0000712534-21-000319 | 10-Q | XBRL Viewer

9,041,576

9,243,174

^[1]

(199,972)

(130,648)

Federal Home Loan Bank stock

8,841,604

9,112,526

Premises and equipment

104,814

111,062

28,736

Interest receivable

53,079

53,948

Goodwill

545,385

543,918

Other intangibles

26,938

28,975

Cash surrender value of life insurance

291,825

292,745

Other real estate owned

698

940

Securities sold under repurchase agreements

39,504

12,340

Other assets

137,928

146,066

TOTAL ASSETS

15,060,725

14,067,210

Deposits:

Noninterest-bearing

2,554,323

2,298,138

Interest-bearing

9,794,366

9,063,472

Total Deposits

12,348,689

11,361,610

Borrowings:

183,589

177,102

Federal Home Loan Bank advances

334,149

389,430

Subordinated debentures and other borrowings

118,558

118,380

Total Borrowings

636,296

684,912

Interest payable

3,736

3,287

Other liabilities

203,914

141,756

Total Liabilities

13,192,635

12,191,565

COMMITMENTS AND CONTINGENT LIABILITIES

STOCKHOLDERS' EQUITY

Cumulative Preferred Stock, $1,000 par value, $1,000 liquidation value: Authorized - 600 shares Issued and outstanding - 125 shares

125

Common Stock, $0.125 stated value: Authorized - 100,000,000 shares Issued and outstanding - 53,972,386 and 53,922,359 shares

6,689

6,740

Additional paid-in capital

988,659

1,005,366

Retained earnings

832,728

788,578

Accumulated other comprehensive income

39,889

74,836

Total Stockholders' Equity

1,868,090

1,875,645

TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY

$ 15,060,725

$ 14,067,210

[1]	Beginning January 1, 2021, the amount is based on the current expected credit loss methodology. Prior to January 1, 2021, the amount is based on the incurred loss methodology. See additional details in NOTE 1. GENERAL of these Notes to Consolidated Condensed Financial Statement.

CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for credit losses	$ 245	$ 0
Investment securities held to maturity - fair value	$ 2,086,555	$ 1,280,293
Preferred Stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, liquidation value per share (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, authorized (in shares)	600	600
Preferred Stock, issued (in shares)	125	125
Preferred Stock, outstanding (in shares)	125	125
Common Stock, stated value (in dollars per share)	$ 0.125	$ 0.125
Common Stock, authorized (in shares)	100,000,000	100,000,000
Common Stock, issued (in shares)	53,510,745	53,922,359
Common Stock, outstanding (in shares)	53,510,745	53,922,359

CONSOLIDATED CONDENSED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Loans receivable:
Taxable	$ 85,319	$ 84,162	$ 257,426	$ 268,126
Tax exempt	5,591	5,395	16,475	16,069
Investment securities:
Taxable	7,788	5,399	21,923	19,177
Tax exempt	14,464	10,931	39,920	30,285
Deposits with financial institutions	218	90	461	799
Federal Home Loan Bank stock	168	248	434	828
Total Interest Income	113,548	106,225	336,639	335,284
INTEREST EXPENSE
Deposits	5,707	9,776	17,730	44,231
Federal funds purchased	0	5	4	118
Securities sold under repurchase agreements	77	83	239	527
Federal Home Loan Bank advances	1,389	1,749	4,283	5,317
Subordinated debentures and other borrowings	1,660	1,691	4,976	5,275
Total Interest Expense	8,833	13,304	27,232	55,468
NET INTEREST INCOME	104,715	92,921	309,407	279,816
Provision for credit losses - loans	0	12,544	0	54,191
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	104,715	80,377	309,407	225,625
OTHER INCOME
Net gains and fees on sales of loans	3,955	5,841	16,266	12,878
Increase in cash surrender value of life insurance	1,198	1,170	3,592	3,761
Gains on life insurance benefits	1,270	1	1,417	96
Net realized gains on sales of available for sale securities	1,756	1,817	5,316	9,497
Other income	1,144	132	2,393	1,425
Total Other Income	28,501	26,163	83,476	82,443
OTHER EXPENSES
Salaries and employee benefits	43,314	39,187	124,563	114,128
Net occupancy	5,576	5,855	17,682	17,103
Equipment	4,529	4,956	14,407	13,789
Marketing	1,676	1,311	3,922	4,846
Outside data processing fees	4,794	3,776	13,736	10,593
Printing and office supplies	265	331	861	997
Intangible asset amortization	1,463	1,486	4,284	4,511
FDIC assessments	1,552	1,249	4,381	4,244
Other real estate owned and foreclosure expenses	(91)	717	821	1,906
Professional and other outside services	2,767	2,254	8,286	6,065
Other expenses	5,539	3,587	13,834	12,687
Total Other Expenses	71,384	64,709	206,777	190,869
INCOME BEFORE INCOME TAX	61,832	41,831	186,106	117,199
Income tax expense	9,062	5,621	28,308	13,734
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 52,770	$ 36,210	$ 157,798	$ 103,465
Per Share Data:
Basic Net Income Available to Common Stockholders (in dollars per share)	$ 0.98	$ 0.67	$ 2.93	$ 1.91
Diluted Net Income Available to Common Stockholders (in dollars per share)	0.98	0.67	2.92	1.91
Cash Dividends Paid (in dollars per share)	$ 0.29	$ 0.26	$ 0.84	$ 0.78
Average Diluted Shares Outstanding (in shares)	53,959,765	53,970,598	54,093,063	54,277,882
Service charges on deposit accounts
OTHER INCOME
Other income	$ 6,249	$ 5,209	$ 17,109	$ 15,491
Fiduciary and wealth management fees
OTHER INCOME
Other income	7,352	5,910	21,284	17,496
Card payment fees
OTHER INCOME
Other income	4,156	3,996	12,682	16,000
Derivative hedge fees
OTHER INCOME
Other income	1,028	1,715	2,288	4,696
Other customer fees
OTHER INCOME
Other income	$ 393	$ 372	$ 1,129	$ 1,103

CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 52,770	$ 36,210	$ 157,798	$ 103,465
Unrealized gains/losses on securities available-for-sale:
Unrealized holding gain (loss) arising during the period	(24,048)	3,568	(39,721)	57,885
Reclassification adjustment for losses (gains) included in net income	(1,756)	(1,817)	(5,316)	(9,497)
Tax effect	5,419	(367)	9,458	(10,162)
Net of tax	(20,385)	1,384	(35,579)	38,226
Unrealized gain/loss on cash flow hedges:
Unrealized holding gain (loss) arising during the period	(20)	8	22	(1,451)
Reclassification adjustment for losses (gains) included in net income	266	294	779	651
Tax effect	(52)	(63)	(169)	168
Net of tax	194	239	632	(632)
Total other comprehensive income (loss), net of tax	(20,191)	1,623	(34,947)	37,594
Comprehensive income	$ 32,579	$ 37,833	$ 122,851	$ 141,059

CONSOLIDATED CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Cumulative effect of ASC 326 adoption	Adjusted balance	Preferred	Preferred Adjusted balance	Common Stock	Common Stock Adjusted balance	Additional Paid-in Capital	Additional Paid-in Capital Adjusted balance	Retained Earnings	Retained Earnings Cumulative effect of ASC 326 adoption	Retained Earnings Adjusted balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Adjusted balance
Beginning balance (in shares) at Dec. 31, 2019				125		55,368,482
Beginning balance at Dec. 31, 2019	$ 1,786,437			$ 125		$ 6,921		$ 1,054,997		$ 696,520			$ 27,874
Comprehensive income:
Net income	103,465									103,465
Other comprehensive income, net of tax	37,594												37,594
Cash dividends on common stock ($.29 per share)	(42,435)									(42,435)
Repurchase of common stock (in shares)						(1,634,437)
Repurchases of common stock	(55,912)					$ (204)		(55,708)
Share-based compensation (in shares)						116,520
Share-based compensation	3,568					$ 15		3,553
Stock issued under employee benefit plans (in shares)						18,639
Stock issued under employee benefit plans	460					$ 2		458
Stock issued under dividend reinvestment and stock purchase plan (in shares)						49,148
Stock issued under dividend reinvestment and stock purchase plan	1,293					$ 6		1,287
Stock options exercised (in shares)						10,050
Stock options exercised	83					$ 1		82
Restricted shares withheld for taxes (in shares)						(36,669)
Restricted shares withheld for taxes	(897)					$ (5)		(892)
Ending balance (in shares) at Sep. 30, 2020				125		53,891,733
Ending balance at Sep. 30, 2020	1,833,656			$ 125		$ 6,736		1,003,777		757,550			65,468
Beginning balance (in shares) at Jun. 30, 2020				125		53,795,500
Beginning balance at Jun. 30, 2020	1,809,095			$ 125		$ 6,724		1,002,962		735,439			63,845
Comprehensive income:
Net income	36,210									36,210
Other comprehensive income, net of tax	1,623												1,623
Cash dividends on common stock ($.29 per share)	(14,099)									(14,099)
Share-based compensation (in shares)						107,929
Share-based compensation	1,135					$ 14		1,121
Stock issued under employee benefit plans (in shares)						7,128
Stock issued under employee benefit plans	151					$ 1		150
Stock issued under dividend reinvestment and stock purchase plan (in shares)						17,541
Stock issued under dividend reinvestment and stock purchase plan	430					$ 2		428
Restricted shares withheld for taxes (in shares)						(36,365)
Restricted shares withheld for taxes	(889)					$ (5)		(884)
Ending balance (in shares) at Sep. 30, 2020				125		53,891,733
Ending balance at Sep. 30, 2020	1,833,656			$ 125		$ 6,736		1,003,777		757,550			65,468
Beginning balance (in shares) at Dec. 31, 2020				125	125	53,922,359	53,922,359
Beginning balance at Dec. 31, 2020	1,875,645	$ (68,040)	$ 1,807,605	$ 125	$ 125	$ 6,740	$ 6,740	1,005,366	$ 1,005,366	788,578	$ (68,040)	$ 720,538	74,836	$ 74,836
Comprehensive income:
Net income	157,798									157,798
Other comprehensive income, net of tax	(34,947)												(34,947)
Cash dividends on common stock ($.29 per share)	(45,608)									(45,608)
Repurchase of common stock (in shares)						(529,498)
Repurchases of common stock	(20,807)					$ (66)		(20,741)
Share-based compensation (in shares)						94,260
Share-based compensation	3,615					$ 12		3,603
Stock issued under employee benefit plans (in shares)						12,006
Stock issued under employee benefit plans	445					$ 2		443
Stock issued under dividend reinvestment and stock purchase plan (in shares)						32,322
Stock issued under dividend reinvestment and stock purchase plan	$ 1,405					$ 4		1,401
Stock options exercised (in shares)	17,300					17,300
Stock options exercised	$ 198					$ 2		196
Restricted shares withheld for taxes (in shares)						(38,004)
Restricted shares withheld for taxes	(1,614)					$ (5)		(1,609)
Ending balance (in shares) at Sep. 30, 2021				125		53,510,745
Ending balance at Sep. 30, 2021	1,868,090			$ 125		$ 6,689		988,659		832,728			39,889
Beginning balance (in shares) at Jun. 30, 2021				125		53,972,386
Beginning balance at Jun. 30, 2021	1,871,800			$ 125		$ 6,747		1,009,182		795,666			60,080
Comprehensive income:
Net income	52,770									52,770
Other comprehensive income, net of tax	(20,191)												(20,191)
Cash dividends on common stock ($.29 per share)	(15,708)									(15,708)
Repurchase of common stock (in shares)						(529,498)
Repurchases of common stock	(20,807)					$ (66)		(20,741)
Share-based compensation (in shares)						89,600
Share-based compensation	1,217					$ 11		1,206
Stock issued under employee benefit plans (in shares)						3,892
Stock issued under employee benefit plans	139					$ 1		138
Stock issued under dividend reinvestment and stock purchase plan (in shares)						12,102
Stock issued under dividend reinvestment and stock purchase plan	474					$ 1		473
Restricted shares withheld for taxes (in shares)						(37,737)
Restricted shares withheld for taxes	(1,604)					$ (5)		(1,599)
Ending balance (in shares) at Sep. 30, 2021				125		53,510,745
Ending balance at Sep. 30, 2021	$ 1,868,090			$ 125		$ 6,689		$ 988,659		$ 832,728			$ 39,889

CONSOLIDATED CONDENSED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited) (Parenthetical) $ in Thousands	12 Months Ended
	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member

Indicates amendment to accounting standards.

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Organization, Consolidation and Presentation of Financial Statements [Abstract]

CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flow From Operating Activities:
Net income	$ 157,798	$ 103,465
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	0	54,191
Depreciation and amortization	8,087	8,214
Change in deferred taxes	(703)	(17,015)
Share-based compensation	3,615	3,568
Loans originated for sale	(410,858)	(477,877)
Proceeds from sales of loans held for sale	422,555	494,945
Gains on sales of loans held for sale	(13,721)	(11,214)
Gains on sales of securities available for sale	(5,316)	(9,497)
Increase in cash surrender of life insurance	(3,592)	(3,761)
Gains on life insurance benefits	(1,417)	(96)
Change in interest receivable	869	(4,091)
Change in interest payable	449	(1,716)
Other adjustments	3,761	5,214
Net cash provided by operating activities	161,527	144,330
Cash Flows from Investing Activities:
Net change in interest-bearing deposits	22,858	(155,673)
Purchases of:
Securities available for sale	(807,833)	(355,407)
Securities held to maturity	(1,017,274)	(507,091)
Proceeds from sales of securities available for sale	157,776	206,704
Proceeds from maturities of:
Securities available for sale	216,135	230,673
Securities held to maturity	170,937	201,272
Net change in loans	126,523	(793,033)
Net cash and cash equivalents paid in acquisition	(2,933)	0
Proceeds from the sale of other real estate owned	678	959
Proceeds from life insurance benefits	5,929	520
Proceeds from mortgage portfolio loan sale	76,067	0
Other adjustments	(8,121)	(8,380)
Net cash used in investing activities	(1,059,258)	(1,179,456)
Net change in :
Demand and savings deposits	1,136,017	1,651,095
Certificates of deposit and other time deposits	(148,938)	(584,898)
Borrowings	45,482	563,697
Repayment of borrowings	(94,098)	(510,826)
Cash dividends on common stock	(45,608)	(42,435)
Stock issued under employee benefit plans	445	460
Stock issued under dividend reinvestment and stock purchase plans	1,405	1,293
Stock options exercised	198	83
Repurchase of common stock	(20,807)	(55,912)
Net cash provided by financing activities	874,096	1,022,557
Net Change in Cash and Cash Equivalents	(23,635)	(12,569)
Cash and Cash Equivalents, January 1	192,896	177,201
Cash and Cash Equivalents, September 30	169,261	164,632
Additional cash flow information:
Interest paid	26,783	57,184
Income tax paid	23,396	32,367
Loans transferred to other real estate owned	292	761
Fixed assets transferred to other real estate owned	6,282	262
Non-cash investing activities using trade date accounting	67,811	66,205
ROU assets obtained in exchange for new operating lease liabilities	2,591	1,406
In conjunction with the acquisitions, liabilities were assumed as follows:
Fair value of assets acquired	4,041	0
Cash paid in acquisition	(3,225)	0
Liabilities assumed	$ 816	$ 0

General

9 Months Ended

Sep. 30, 2021

General

GENERAL

Financial Statement Preparation

The Consolidated Condensed Balance Sheet of the Corporation as of December 31, 2020, has been derived from the audited consolidated balance sheet of the Corporation as of that date. Certain information and note disclosures normally included in the Corporation’s annual financial statements, prepared in accordance with accounting principles generally accepted in the United States of America, have been condensed or omitted. These consolidated condensed financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2020 filed with the Securities and Exchange Commission. The results of operations for the three and nine months ended September 30, 2021, are not necessarily indicative of the results to be expected for the year. Reclassifications have been made to prior financial statements to conform to the current financial statement presentation. These reclassifications had no effect on net income. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for credit losses and fair value of financial instruments. The uncertainties related to the coronavirus disease 2019 ("COVID-19") could cause significant changes to these estimates compared to what was known at the time these financial statements were prepared.

Significant Accounting Policies

The significant accounting policies followed by the Corporation and its wholly-owned subsidiaries for interim financial reporting are consistent with the accounting policies followed for annual financial reporting, with the exception of the Corporation's adoption of ASC 326 as described below under the heading "Recent Accounting Changes Adopted In 2021." The Corporation revised certain accounting policies and implemented certain accounting policy elections, related to the adoption of ASC 326 which are described below. All adjustments, which are of a normal recurring nature and are in the opinion of management necessary for a fair statement of the results for the periods reported, have been included in the accompanying Consolidated Condensed Financial Statements.

The Corporation adopted FASB Accounting Standards Update (ASU) No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ("CECL") on January 1, 2021. CECL replaces the previous "incurred loss" model for measuring credit losses, which encompassed allowances for current known and inherent losses within the portfolio, with an "expected loss" model for measuring credit losses, which encompasses allowances for losses expected to be incurred over the life of the portfolio. The new CECL model requires the measurement of all expected credit losses for financial assets measured at amortized cost and certain off-balance sheet credit exposures based on historical experiences, current conditions, and reasonable and supportable forecasts. CECL also requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as credit quality and underwriting standards of an organization's portfolio. In addition, CECL includes certain changes to the accounting for investment securities available for sale depending on whether management intends to sell the securities or believes that it is more likely than not they will be required to sell.

As of the adoption and day one measurement date of January 1, 2021, the Corporation recorded a one-time cumulative-effect adjustment to retained earnings, net of income taxes, on the consolidated balance sheet of $68.0 million. The allowance increased 57 percent from December 31, 2020, or $74.1 million, because it covered expected credit losses over the life of the loan portfolio, which approximates four years, and it included an allowance on all purchased loans that were previously excluded from the allowance for loan losses calculation. CECL also requires the establishment of a reserve for potential losses from unfunded commitments that is recorded in other liabilities, separate from allowance for credit losses, which was approximately $20.5 million. An allowance for credit losses of $245,000 was recorded on the state and municipal securities classified as held to maturity based on applying the long-term historical credit loss rate, as published by Moody’s, for similarly rated securities. The following table details the impact of the adoption of CECL on the Corporation's balance sheet as of January 1, 2021.


	December 31, 2020		Impact of CECL Adoption		January 1, 2021 Post-CECL Adoption
Assets:
Held to maturity securities	$	1,227,668	$	(245)	$	1,227,423
Loans	9,243,174		4,776		9,247,950
Allowance for credit losses - Loans	(130,648)		(74,055)		(204,703)
Net loans	9,112,526		(69,279)		9,043,247
Tax asset, deferred and receivable	12,340		21,984		34,324

Liabilities:
Allowance for credit losses on unfunded loan commitments	—		20,500		20,500

Stockholder's Equity:
Retained Earnings	788,578		(68,040)		720,538
			$	—

Allowance for credit losses on investment securities available for sale – for investment securities available for sale in an unrealized loss position, the Corporation first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For investment securities available for sale that do not meet the aforementioned criteria, the Corporation evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, the Corporation considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded, limited by the amount that the fair value is less than the amortized cost basis. Unrealized losses that have not been recorded through an allowance for credit losses are recognized in other comprehensive income. Adjustments to the allowance for credit losses are reported in the income statement as a component of the provision for credit loss. The Corporation has made the accounting policy election to exclude accrued interest receivable on investment securities available for sale from the estimate of credit losses. Investment securities available for sale are charged off against the allowance or, in the absence of any allowance, written down through the income statement when deemed uncollectible or when either of the aforementioned criteria regarding intent or requirement to sell is met. The Corporation did not record an allowance for credit losses on its investment securities available for sale as the unrealized losses were attributable to changes in interest rates, not credit quality.

Allowance for credit losses on investment securities held to maturity ("ACL - Investments") – the ACL - Investments is a contra asset-valuation account that is deducted from the amortized cost basis of investment securities held to maturity to present the net amount expected to be collected. Investment securities held to maturity are charged off against the ACL - Investments when deemed uncollectible. Adjustments to the ACL - Investments are reported in the income statement as a component of the provision for credit loss. The Corporation measures expected credit losses on held to maturity debt securities on a collective basis by major security type with each type sharing similar risk characteristics, and considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. The Corporation has made the accounting policy election to exclude accrued interest receivable on investment securities held to maturity from the estimate of credit losses. With regard to U.S. Government-sponsored agency and mortgage-backed securities, all these securities are issued by a U.S. government-sponsored entity and have an implicit or explicit government guarantee. With regard to securities issued by states and municipalities and other investment securities held to maturity, management considers (1) issuer bond ratings, (2) the financial condition of the issuer, (3) historical loss rates for given bond ratings, and (4) whether issuers continue to make timely principal and interest payments under the contractual terms of the securities. Historical loss rates associated with securities having similar grades as those in the Corporation's portfolio have generally not been significant. Furthermore, as of September 30, 2021, there were no past due principal and interest payments associated with these securities. An allowance for credit losses of $245,000 was recorded on the state and municipal securities classified as held to maturity based on applying the long-term historical credit loss rate, as published by Moody’s, for similarly rated securities.

Purchased Credit Deteriorated (“PCD”) – the Corporation has purchased loans, some of which have experienced more than insignificant credit deterioration since origination. PCD loans are recorded at the amount paid. An allowance for credit losses is determined using the same methodology as other loans held for investment. The initial allowance for credit losses determined on a collective basis is allocated to individual loans. The sum of the loan’s purchase price and allowance for credit losses becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is the noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent changes to the allowance for credit losses are recorded through the provision for credit losses.

Allowance for Credit Losses - Loans ("ACL - Loans") - the ACL - Loans is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on loans over the contractual term. Loans are charged off against the allowance when the uncollectibility of the loan is confirmed. Expected recoveries do not exceed the aggregate of amounts previously charged off and expected to be charged off. Adjustments to the ACL- Loans are reported in the income statement as a component of provision for credit loss. The Corporation has made the accounting policy election to exclude accrued interest receivable on loans from the estimate of credit losses. Further information regarding the policies and methodology used to estimate the ACL - Loans is detailed in NOTE 4. LOANS AND ALLOWANCE of these Notes to Consolidated Condensed Financial Statements.

Allowance for Credit Losses – Off-Balance Sheet Credit Exposures – the allowance for credit losses on off-balance sheet credit exposures is a liability account representing expected credit losses over the contractual period for which the Corporation is exposed to credit risk resulting from a contractual obligation to extend credit. No allowance is recognized if the Corporation has the unconditional right to cancel the obligation. Off-balance sheet credit exposures primarily consist of amounts available under outstanding lines of credit and letters of credit. For the period of exposure, the estimate of expected credit losses considers both the likelihood that funding will occur and the amount expected to be funded over the estimated remaining life of the commitment or other off-balance sheet exposure. The likelihood and expected amount of funding are based on historical utilization rates. The amount of the allowance represents management’s best estimate of expected credit losses on commitments expected to be funded over the contractual life of the commitment. The allowance for off-balance sheet credit exposures is adjusted through the income statement as a component of provision for credit loss.

Impact of COVID-19

On January 30, 2020, the World Health Organization (“WHO”) announced that the outbreak of COVID-19 constituted a public health emergency of international concern. On March 11, 2020, WHO declared COVID-19 to be a global pandemic and, on March 13, 2020, the President of the United States declared the COVID-19 outbreak a national emergency. The health concerns relating to the COVID-19 outbreak and related governmental actions taken to reduce the spread of the virus have significantly impacted the global economy (including the states and local economies in which the Corporation operates), disrupted supply chains, and created significant volatility and disruption in financial markets. The outbreak resulted in authorities implementing numerous measures to try to contain the virus, such as travel bans and restrictions, quarantines, shelter in place or total lock-down orders and business limitations and shutdowns. As a result of the shelter in place mandates in effect beginning early in the second quarter of 2020, commercial activity throughout our geographic footprint, as well as nationally, have decreased significantly during 2020 and 2021. These containment measures led to increased unemployment and negatively impacted consumer and business spending. Although the vaccination rate in the U.S. continues to increase and most states have reopened, commercial activity has not yet returned to the levels existing prior to the outbreak of the pandemic. Moreover, certain states and localities have recently experienced significant increases in the number of individuals diagnosed with COVID-19 as variant strains of the virus have spread, which may further complicate efforts of the medical community and federal, state and local governments to respond to the pandemic.

The continued impact of COVID-19 on the Corporation will depend on numerous factors and future developments that are highly uncertain and cannot be predicted with confidence. It is unknown how long the COVID-19 pandemic will last, or when restrictions on individuals and businesses will be fully lifted and businesses and their employees will be able to resume normal activities. Additional information may emerge regarding new developments with COVID-19 and additional actions may be taken by federal, state and local governments to contain COVID-19 or treat its impact. Changes in the behavior of customers, businesses and their employees as a result of COVID-19 pandemic are also unknown. As a result of COVID-19 and the actions taken to contain it or reduce its impact, we may continue to experience changes in the demand for our products and services, changes in the value of collateral securing outstanding loans, reductions in the credit quality of borrowers and the inability of borrowers to repay loans in accordance with their terms. Our commercial and consumer customers are experiencing varying degrees of financial distress, which is expected to continue throughout 2021, especially if positive cases increase and economic shutdowns continue or are reinstated. These and similar factors and events may have substantial negative effects on the business, financial condition and results of operations of the Corporation and its customers.

On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”) was signed into law, providing an approximately $2 trillion stimulus package that included direct payments to individual taxpayers, economic stimulus to significantly impacted industry sectors, emergency funding for hospitals and providers, small business loans, increased unemployment benefits, and a variety of tax incentives. For small businesses, eligible nonprofits and certain others, the CARES Act established the Paycheck Protection Program (“PPP”), a lending program administered by the Small Business Administration (“SBA”) that was intended to incentivize participants to retain their employees by providing them with loans that are fully guaranteed by the U.S. government and subject to forgiveness if program guidelines are met. The CARES Act and the PPP were further amended throughout 2020 in order to provide additional funding and to extend the two-year maturity for PPP loans to five years. On December 27, 2020, the Economic Aid to Hard-Hit Small Businesses, Nonprofits, and Venues Act was signed into law as part of the Consolidated Appropriations Act, 2021 (the “CAA”), which amended the CARES Act to, among other things, provide additional funding for the PPP and extend the program through March 31, 2021. Under the American Rescue Plan Act of 2021 and the PPP Extension Act of 2021, which were both enacted during March 2021, additional funds were provided for the program and the deadline for applying for PPP loans was extended through May 31, 2021 (with the SBA given until June 30, 2021 to process loan applications). The Bank actively participated in assisting its customers with PPP funding during all phases of the program. The vast majority of the Bank’s PPP loans made in 2020 have two-year maturities, while the loans made in 2021 have five-year maturities. Loans under the program earn interest at a fixed rate of 1 percent. As of September 30, 2021, the Corporation had $198.1 million of Paycheck Protection Program ("PPP") loans compared to the December 31, 2020 balance of $667.1 million. The Bank anticipates that the majority of its remaining PPP loans will also be forgiven by the SBA in accordance with the terms of the program.

Guidance on Non-TDR Loan Modifications due to COVID-19

On March 22, 2020, a statement was issued by the Bank’s banking regulators and titled the “Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus” (the “Interagency Statement”) that encourages financial institutions to work prudently with borrowers who are or may be unable to meet their contractual payment obligations due to the effects of COVID-19. Additionally, Section 4013 of the CARES Act further provides that a qualified loan modification is exempt by law from classification as a troubled debt restructure as defined by GAAP, from the period beginning March 1, 2020 until the earlier of December 31, 2020 or the date that is 60 days after the date on which the national emergency concerning the COVID-19 outbreak under the National Emergencies Act (50 U.S.C. 1601 et seq.) terminates. The Interagency Statement was subsequently revised on April 7, 2020 to clarify the interaction of the original guidance with Section 4013 of the CARES Act, as well as setting forth the banking regulators’ views on consumer protection considerations. In accordance with such guidance, the Bank has offered short-term modifications made in response to COVID-19 to borrowers who were current and otherwise not past due. These included short-term, 180 days or less, modifications in the form of payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant. The CAA, as described above, extended the expiration date for COVID-related loan modifications exempt from troubled debt restructuring classification until the earlier of January 1, 2022, or 60 days after the termination of the national emergency. Details of the Corporation's modifications are included in the "LOAN QUALITY" section of Management’s Discussion and Analysis of Financial Condition and Results of Operations included in this Form 10-Q.

Recent Accounting Changes Adopted In 2021

The Corporation continually monitors potential accounting pronouncements and the following pronouncements have been deemed to have the most applicability to the Corporation's financial statements:

FASB Accounting Standards Updates No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

Summary - The FASB issued Accounting Standards Update (ASU) No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This new guidance replaces the previous "incurred loss" model for measuring credit losses with an "expected life of loan loss" model, referred to as the CECL model.

Under the CECL model, certain financial assets carried at amortized cost, such as loans held for investment and held-to-maturity debt securities, are required to be presented at the net amount expected to be collected. The measurement of expected credit losses is based on information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. This measurement takes place at the time the financial asset is first added to the balance sheet and periodically thereafter. This differs significantly from the “incurred loss” model, which delayed recognition until it is probable a loss had been incurred.

The Corporation developed models that satisfy the requirements of the new standard which are governed by a system of internal controls and a cross-functional working group consisting of accounting, finance, and credit administration personnel. The loan portfolio was pooled into ten loan segments with similar risk characteristics for which the probability of default/loss given default methodology was applied. The Corporation utilized a one-year economic forecast period then reverted to historical macroeconomic levels for the remaining life of the portfolio. A baseline macroeconomic scenario, along with other scenarios, were used to develop a range of estimated credit losses for which to determine the best estimate within.

The ASU was effective for SEC filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Pursuant to the CARES Act and the related joint statement of federal banking regulators (which also became effective as of March 27, 2020), and consistent with guidance from the SEC and FASB, the Corporation elected to delay implementation of ASU No. 2016-13, which was set to expire on December 31, 2020. However, the CAA (as discussed above) extended the temporary relief from CECL compliance to the earlier of the first day of the fiscal year that begins after the date on which the national emergency concerning COVID-19 terminates, or January 1, 2022. The Corporation elected to delay implementation of CECL following the approval of the CARES Act and, with the enactment of the CAA, the Corporation elected to adopt CECL on January 1, 2021. This allows the Corporation to utilize the CECL standard for the entire year of 2021, while its 2020 financial statements were prepared under the incurred loss model.

FASB Accounting Standards Updates No. 2019-11 - Codification Improvements to (Topic 326): Financial Instruments - Credit Losses

Summary - The FASB issued ASU No. 2019-11, Codification Improvements to Topic 326, Financial Instruments - Credit Losses in order to address issues raised by stakeholders during the implementation of ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses of Financial Instruments.

Among other narrow-scope improvements, the new ASU clarifies guidance around how to report expected recoveries. “Expected recoveries” describes a situation in which an organization recognizes a full or partial write-off of the amortized cost basis of a financial asset, but then later determines that the amount written off, or a portion of that amount, will in fact be recovered. While applying the credit losses standard, stakeholders questioned whether expected recoveries were permitted on assets that had already shown credit deterioration at the time of purchase (also known as PCD assets). In response to this question, the ASU permits organizations to record expected recoveries on PCD assets. In addition to other narrow technical improvements, the ASU also reinforces existing guidance that prohibits organizations from recording negative allowances for available-for-sale debt securities.

The ASU includes effective dates and transition requirements that vary depending on whether or not an entity has already adopted ASU No. 2016-13. As discussed above, pursuant to the CARES Act, the Corporation elected to defer the adoption of CECL. Additionally, the 2021 Consolidated Appropriations Act ("CAA"), signed into law on December 27, 2020, amended the CARES Act by extending the temporary relief from CECL compliance to the earlier of the first day of the fiscal year that begins after the date on which the national emergency concerning COVID-19 terminates, or January 1, 2022. The Corporation elected to delay implementation of CECL following the approval of the CARES Act and, with the enactment of the CAA, the Corporation elected to adopt CECL on January 1, 2021. The adoption of this standard did not have a significant effect on the Corporation’s consolidated financial statements or disclosures.

FASB Accounting Standards Update No. 2019-12 - Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes

Summary - The FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which is expected to reduce cost and complexity related to the accounting for income taxes.

The ASU removes specific exceptions to the general principles in Topic 740 in Generally Accepted Accounting Principles (GAAP). It eliminates the need for an organization to analyze whether the following apply in a given period:

• Exception to the incremental approach for intraperiod tax allocation;

• Exceptions to accounting for basis differences when there are ownership changes in foreign investments; and

• Exception in interim period income tax accounting for year-to-date losses that exceed anticipated losses.

The ASU also improves financial statement preparers’ application of income tax-related guidance and simplifies GAAP for:

• Franchise taxes that are partially based on income;

• Transactions with a government that result in a step up in the tax basis of goodwill

• Separate financial statements of legal entities that are not subject to tax; and

• Enacted changes in tax laws in interim periods.

The ASU is part of the FASB’s simplification initiative to make narrow-scope simplifications and improvements to accounting standards through a series of short-term projects. For public business entities, the ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption of the ASU was permitted. The Corporation adopted this standard on January 1, 2021 and adoption of this standard did not have a significant effect on the Corporation's consolidated financial statements or disclosures.

New Accounting Pronouncements Not Yet Adopted

FASB Accounting Standards Updates - No. 2020-04 - Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting

Summary - The FASB issued ASU No. 2020-04 to provide temporary optional guidance to ease the potential burden in accounting for reference rate reform. LIBOR and other interbank offered rates are widely used benchmarks or reference rates in the United States and globally. Trillions of dollars in loans, derivatives, and other financial contracts reference LIBOR, the benchmark interest rate banks use to make short-term loans to each other. With global capital markets expected to move away from LIBOR and other interbank offered rates and move toward rates that are more observable or transaction based and less susceptible to manipulation, the FASB launched a broad project in late 2018 to address potential accounting challenges expected to arise from the transition. The new guidance provides optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The ASU is intended to help stakeholders during the global market-wide reference rate transition period.

Entities may apply this ASU as of the beginning of an interim period that includes the March 12, 2020 issuance date of the ASU, through December 31, 2022. The Corporation expects to adopt the practical expedients included in the ASU prior to December 31, 2022. The Corporation is implementing a transition plan to identify and modify its loans and other financial instruments with attributes that are either directly or indirectly influenced by LIBOR. The Corporation is assessing ASU 2020-04 and its impact on the Corporation's transition away from LIBOR for its loans and other financial instruments.

FASB Accounting Standards Updates - Accounting Standards Update No. 2021-01 - Reference Rate Reform (Topic 848): Scope

Summary - The FASB has published ASU 2021-01, Reference Rate Reform. ASU 2021-01 clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. The ASU also amends the expedients and exceptions in Topic 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition.

An entity may elect to apply the amendments in this Update on a full retrospective basis as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or on a prospective basis to new modifications from any date within an interim period that includes or is subsequent to the date of the issuance of a final Update, up to the date that financial statements are available to be issued.

If an entity elects to apply any of the amendments in this Update for an eligible hedging relationship, any adjustments as a result of those elections must be reflected as of the date the entity applies the election.

The amendments in this Update do not apply to contract modifications made after December 31, 2022, new hedging relationships entered into after December 31, 2022, and existing hedging relationships evaluated for effectiveness in periods after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that apply certain optional expedients in which the accounting effects are recorded through the end of the hedging relationship (including periods after December 31, 2022). The Corporation is assessing ASU 2021-01 and its impact on the Corporation's transition away from LIBOR for its loans and other financial instruments.

Acquisition

9 Months Ended

Sep. 30, 2021

Business Combination and Asset Acquisition [Abstract]

Acquisition

ACQUISITION

Hoosier Trust Company

On April 1, 2021, the Bank acquired 100 percent of Hoosier Trust Company ("Hoosier") through a merger of Hoosier with and into the Bank. The consideration paid to shareholders of Hoosier at closing was $3,225,000 in cash. Prior to the acquisition, Hoosier was an Indiana corporate trust company, headquartered in Indianapolis, Indiana, with approximately $290 million in assets under management. Hoosier’s sole office is now being operated by the Bank as a limited service trust office.

Under the acquisition method of accounting, the total purchase price is allocated to net tangible and intangible assets based on their current estimated fair value on the date of the acquisition. Based on preliminary valuations of the fair value of tangible and intangible assets acquired and liabilities assumed, which are based on assumptions that are subject to change based on the timing of the transaction, the purchase price for the Hoosier acquisition is detailed in the following table. If, prior to the end of the one-year measurement period for finalizing the purchase price allocation, information becomes available about facts and circumstances that existed as of the acquisition date, which would indicate adjustments are required to the purchase price allocation, such adjustments will be included in the purchase price allocation retrospectively.


	Fair Value
Cash and cash equivalents	$	292
Other assets	35
Other liabilities	(816)
Net tangible assets acquired	(489)
Customer relationship intangible	2,247
Goodwill	1,467
Purchase price	$	3,225

Of the total purchase price, $2,247,000 was allocated to a customer relationship intangible, which will be amortized over its estimated life of 10 years. The remaining purchase price was allocated to goodwill, which is deductible for tax purposes. Pro forma financial information of the Hoosier acquisition is not included in these disclosures as it is deemed immaterial.

Investment Securities

9 Months Ended

Sep. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Investment Securities

INVESTMENT SECURITIES

The following table summarizes the amortized cost, gross unrealized gains and losses and approximate fair value of investment securities available for sale as of September 30, 2021 and December 31, 2020.


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available for sale at September 30, 2021
U.S. Treasury	$	1,000	$	—	$	—	$	1,000
U.S. Government-sponsored agency securities	11,500		57		—		11,557
State and municipal	1,466,349		72,152		3,946		1,534,555
U.S. Government-sponsored mortgage-backed securities	825,097		10,255		12,215		823,137
Corporate obligations	4,031		298		—		4,329

Total available for sale	$	2,307,977	$	82,762	$	16,161	$	2,374,578


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available for sale at December 31, 2020
U.S. Government-sponsored agency securities	$	2,380	$	50	$	—	$	2,430
State and municipal	1,168,711		89,420		246		1,257,885
U.S. Government-sponsored mortgage-backed securities	632,267		22,505		103		654,669
Corporate obligations	4,031		104		—		4,135

Total available for sale	$	1,807,389	$	112,079	$	349	$	1,919,119

The following table summarizes the amortized cost, gross unrealized gains and losses, approximate fair value and allowance for credit losses on investment securities held to maturity as of September 30, 2021 and December 31, 2020.


	Amortized Cost		Allowance for Credit Losses		Net Carrying Amount		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Held to maturity at September 30, 2021
U.S. Government-sponsored agency securities	$	90,678	$	—	$	90,678	$	86	$	840	$	89,924
State and municipal	996,247		245		996,002		24,330		9,618		1,010,959
U.S. Government-sponsored mortgage-backed securities	982,758		—		982,758		10,353		8,939		984,172
Foreign investment	1,500		—		1,500		—		—		1,500
Total held to maturity	$	2,071,183	$	245	$	2,070,938	$	34,769	$	19,397	$	2,086,555


	Amortized Cost		Allowance for Credit Losses		Net Carrying Amount		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Held to maturity at December 31, 2020
U.S. Government-sponsored agency securities	$	31,087	$	—	$	31,087	$	10	$	113	$	30,984
State and municipal	619,927		—		619,927		34,978		32		654,873
U.S. Government-sponsored mortgage-backed securities	575,154		—		575,154		17,889		107		592,936
Foreign investment	1,500		—		1,500		—		—		1,500
Total held to maturity	$	1,227,668	$	—	$	1,227,668	$	52,877	$	252	$	1,280,293

Accrued interest on investment securities available for sale and held to maturity of $22.8 million are included in the Interest Receivable line on the Corporation's Consolidated Condensed Balance Sheets. The total amount of accrued interest is excluded from the amortized cost of available for sale and held to maturity securities presented above.

In determining the allowance for credit losses on investment securities available for sale that are in an unrealized loss position, the Corporation first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through the income statement. For investment securities available for sale that do not meet the aforementioned criteria, the Corporation evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, the Corporation considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Unrealized losses that have not been recorded through an allowance for credit losses is recognized in other comprehensive income. Adjustments to the allowance are reported in the income statement as a component of the provision for credit loss. The Corporation has made the accounting policy election to exclude accrued interest receivable on investment securities available for sale from the estimate of credit losses. Investment securities available for sale are charged off against the allowance or, in the absence of any allowance, written down through the income statement when deemed uncollectible or when either of the aforementioned criteria regarding intent or requirement to sell is met. The Corporation did not record an allowance for credit losses on its investment securities available for sale as the unrealized losses were attributable to changes in interest rates, not credit quality.

The allowance for credit losses on investment securities held to maturity is a contra asset-valuation account that is deducted from the amortized cost basis of investment securities held to maturity to present the net amount expected to be collected. Investment securities held to maturity are charged off against the allowance when deemed uncollectible. Adjustments to the allowance are reported in the income statement as a component of the provision for credit loss. The Corporation measures expected credit losses on investment securities held to maturity on a collective basis by major security type with each type sharing similar risk characteristics, and considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. The Corporation has made the accounting policy election to exclude accrued interest receivable on investment securities held to maturity from the estimate of credit losses. With regard to U.S. Government-sponsored agency and mortgage-backed securities, all these securities are issued by a U.S. government-sponsored entity and have an implicit or explicit government guarantee; therefore, no allowance for credit losses has been recorded for these securities. With regard to securities issued by states and municipalities and other investment securities held to maturity, management considers (1) issuer bond ratings, (2) historical loss rates for given bond ratings, (3) the financial condition of the issuer, and (4) whether issuers continue to make timely principal and interest payments under the contractual terms of the securities. Historical loss rates associated with securities having similar grades as those in the Corporation's portfolio have been insignificant. Furthermore, as of September 30, 2021, there were no past due principal and interest payments associated with these securities. An allowance for credit losses of $245,000 was recorded on the state and municipal securities classified as held to maturity based on applying the long-term historical credit loss rate, as published by Moody’s, for similarly rated securities.

On a quarterly basis, the Corporation monitors the credit quality of investment securities held to maturity through the use of credit ratings. The following table summarizes the amortized cost of investment securities held to maturity at September 30, 2021, aggregated by credit quality indicator.


	Held to Maturity
	State and municipal		Other		Total
Credit Rating:
Aaa	$	90,991	$	60,678	$	151,669
Aa1	146,992		—		146,992
Aa2	161,730		—		161,730
Aa3	124,369		—		124,369
A1	88,277		—		88,277
A2	23,103		—		23,103
A3	1,066		—		1,066
Baa2	266		—		266
Non-rated	359,453		1,014,258		1,373,711
Total	$	996,247	$	1,074,936	$	2,071,183

The following table details activity in the allowance for credit losses on investment securities held to maturity during the nine months ended September 30, 2021.


	State and municipal
Allowance for Credit Losses:
Balance, December 31, 2020	$	—
Impact of adopting ASC 326	245
Provision for credit loss	—
Securities charged off	—
Recoveries on securities	—
Balance, September 30, 2021	$	245

The following tables summarize, as of September 30, 2021 and December 31, 2020, investment securities available for sale in an unrealized loss position for which an allowance for credit losses has not been recorded, aggregated by security type and length of time in a continuous unrealized loss position.


	Less than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Investment securities available for sale at September 30, 2021

State and municipal	$	273,742	$	3,938	$	501	$	8	$	274,243	$	3,946
U.S. Government-sponsored mortgage-backed securities	525,836		12,215		—		—		525,836		12,215

Total investment securities available for sale	$	799,578	$	16,153	$	501	$	8	$	800,079	$	16,161


	Less than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Investment securities available for sale at December 31, 2020

State and municipal	$	5,368	$	246	$	—	$	—	$	5,368	$	246
U.S. Government-sponsored mortgage-backed securities	9,651		103		—		—		9,651		103

Total investment securities available for sale	$	15,019	$	349	$	—	$	—	$	15,019	$	349

Certain investment securities available for sale are reported in the financial statements at an amount less than their historical cost as indicated in the table below.


	September 30, 2021			December 31, 2020
Investments available for sale reported at less than historical cost:
Historical cost	$	816,240		$	15,368
Fair value	800,079			15,019
Gross unrealized losses	$	16,161		$	349
Percent of the Corporation's investments available for sale	33.7		%	0.8		%

In determining the fair value of the investment securities portfolio, the Corporation utilizes a third party for portfolio accounting services, including market value input, for those securities classified as Level 1 and Level 2 in the fair value hierarchy. The Corporation has obtained an understanding of what inputs are being used by the vendor in pricing the portfolio and how the vendor classified these securities based upon these inputs. From these discussions, the Corporation’s management is comfortable that the classifications are proper. The Corporation has gained trust in the data for two reasons: (a) independent spot testing of the data is conducted by the Corporation through obtaining market quotes from various brokers on a periodic basis; and (b) actual gains or loss resulting from the sale of certain securities has proven the data to be accurate over time. Fair value of securities classified as Level 3 in the valuation hierarchy was determined using a discounted cash flow model that incorporated market estimates of interest rates and volatility in markets that have not been active.

U.S. Government-Sponsored Mortgage-Backed Securities

The unrealized losses on the Corporation's investment in mortgage-backed securities were a result of interest rate changes. The Corporation expects to recover the amortized cost basis over the term of the securities. Because the decline in market value is attributable to changes in interest rates and not credit quality, and because the Corporation does not intend to sell the investments and it is not more likely than not that the Corporation will be required to sell the investments before recovery of their amortized cost basis, which may be maturity. At September 30, 2021, the mortgage-backed securities portfolio contains unrealized losses of $12.2 million on forty-nine securities in the available for sale portfolio. All these securities are issued by a government-sponsored entity.

State and Municipal Securities

The unrealized losses on the Corporation's investments in securities of state and political subdivisions were caused by interest rate increases. The contractual terms of those investments do not permit the issuer to settle the securities at a price less than the amortized cost basis of the investments. The Corporation does not intend to sell the investments and it is not more likely than not that the Corporation will be required to sell the investments before recovery of their amortized cost basis, which may be maturity. At September 30, 2021, the state and municipal securities portfolio contains unrealized losses of $3.9 million on one hundred seventy-nine securities in the available for sale portfolio.

The amortized cost and fair value of investment securities available for sale and held to maturity at September 30, 2021 and December 31, 2020, by contractual maturity are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity are shown separately.


	Available for Sale				Held to Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Maturity Distribution at September 30, 2021
Due in one year or less	$	2,421	$	2,428	$	8,718	$	8,766
Due after one through five years	13,087		14,068		28,789		30,589
Due after five through ten years	100,122		105,457		176,603		180,790
Due after ten years	1,367,250		1,429,488		874,315		882,238
	1,482,880		1,551,441		1,088,425		1,102,383
U.S. Government-sponsored mortgage-backed securities	825,097		823,137		982,758		984,172

Total investment securities	$	2,307,977	$	2,374,578	$	2,071,183	$	2,086,555


	Available for Sale				Held to Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Maturity Distribution at December 31, 2020
Due in one year or less	$	1,349	$	1,353	$	9,712	$	9,755
Due after one through five years	5,545		5,764		22,241		23,190
Due after five through ten years	70,777		75,223		115,408		121,333
Due after ten years	1,097,451		1,182,110		505,153		533,079
	1,175,122		1,264,450		652,514		687,357
U.S. Government-sponsored mortgage-backed securities	632,267		654,669		575,154		592,936

Total investment securities	$	1,807,389	$	1,919,119	$	1,227,668	$	1,280,293

Securities with a carrying value of approximately $946.2 million and $890.0 million were pledged at September 30, 2021 and December 31, 2020, respectively, to secure certain deposits and securities sold under repurchase agreements, and for other purposes as permitted or required by law.

The book value of securities sold under agreements to repurchase amounted to $176.7 million at September 30, 2021 and $167.3 million at

December 31, 2020.

Gross gains and losses on the sales and redemptions of investment securities available for sale for the three and nine months ended September 30, 2021 and 2020 are shown below.


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Sales and redemptions of investment securities available for sale:
Gross gains	$	1,915	$	1,836	$	5,814	$	9,516
Gross losses	159		19		498		19

Net gains on sales and redemptions of investment securities available for sale	$	1,756	$	1,817	$	5,316	$	9,497

Loans and Allowance

9 Months Ended

Sep. 30, 2021

Receivables [Abstract]

Loans and Allowance

LOANS AND ALLOWANCE

Loan Portfolio and Credit Quality

The Corporation's primary lending focus is small business and middle market commercial, commercial real estate, public finance and residential real estate, which results in portfolio diversification. The following tables show the composition of the loan portfolio and credit quality characteristics by collateral classification, excluding loans held for sale. Loans held for sale at September 30, 2021 and December 31, 2020, were $6.0 million and $4.0 million, respectively.

The following table illustrates the composition of the Corporation’s loan portfolio by loan class for the periods indicated:


	September 30, 2021		December 31, 2020

Commercial and industrial loans	$	2,573,615	$	2,776,699
Agricultural land, production and other loans to farmers	240,686		281,884
Real estate loans:
Construction	521,889		484,723
Commercial real estate, non-owner occupied	2,150,387		2,220,949
Commercial real estate, owner occupied	952,441		958,501
Residential	1,154,373		1,234,741
Home equity	531,307		508,259
Individuals' loans for household and other personal expenditures	135,093		129,479
Public finance and other commercial loans	781,785		647,939
Loans	$	9,041,576	$	9,243,174

As of September 30, 2021, the Corporation had $198.1 million of Paycheck Protection Program ("PPP") loans compared to the December 31, 2020 balance of $667.1 million. PPP loans are included in the commercial and industrial loan class. Additional details of the PPP are included in The CARES Act and the Paycheck Protection Program sections of the "COVID-19 UPDATE" in the Management’s Discussion and Analysis of Financial Condition and Results of Operations included in this Form 10-Q.

Credit Quality

As part of the ongoing monitoring of the credit quality of the Corporation's loan portfolio, management tracks certain credit quality indicators including trends related to: (i) the level of criticized commercial loans, (ii) net charge-offs, (iii) non-performing loans, (iv) covenant failures and (v) the general national and local economic conditions.

The Corporation utilizes a risk grading of pass, special mention, substandard, doubtful and loss to assess the overall credit quality of large commercial loans. All large commercial credit grades are reviewed at a minimum of once a year for pass grade loans. Loans with grades below pass are reviewed more frequently depending on the grade. A description of the general characteristics of these grades is as follows:

•Pass - Loans that are considered to be of acceptable credit quality.

•Special Mention - Loans which possess some credit deficiency or potential weakness, which deserves close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the Corporation's credit position at some future date. Special mention assets are not adversely classified and do not expose the Corporation to sufficient risk to warrant adverse classification.

•Substandard - A substandard loan is inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Assets so classified have a well-defined weakness that jeopardizes the liquidation of the debt. They are characterized by the distinct possibility that the Corporation will sustain some loss if the deficiencies are not corrected.

•Doubtful - Loans that have all of the weaknesses of those classified as Substandard. However, based on currently existing facts, conditions and values, these weaknesses make full collection of principal highly questionable and improbable.

•Loss – Loans that are considered uncollectible and of such little value that continuing to carry them as an asset is not warranted. Loans will be classified as Loss when it is neither practical or desirable to defer writing off or reserving all or a portion of a basically worthless asset, even though partial recovery may be possible at some time in the future.

The following tables summarize the risk grading of the Corporation’s loan portfolio by loan class and by year of origination for the years indicated. Consumer loans are not risk graded. For the purposes of this disclosure, the consumer loans are classified in the following manner: loans that are less than 30 days past due are Pass, loans 30-89 days past due are Special Mention and loans greater than 89 days past due are Substandard. The entire balance of a loan is considered delinquent if the minimum payment contractually required to be made is not received by the specified due date. Loans that evidenced deterioration of credit quality since origination and it was probable, at acquisition, that all contractually required payments would not be collected are included in the applicable categories below. Commercial and industrial loan balances as of September 30, 2021 with an origination year of 2021 and 2020 include PPP loans of $182.2 million and $15.9 million, respectively.


	Term Loans (amortized cost basis by origination year)
	2021		2020		2019		2018		2017		Prior		Revolving loans amortized cost basis		Revolving loans converted to term		Total
Commercial and industrial loans
Pass	$	795,366	$	458,425	$	188,155	$	74,791	$	24,767	$	41,419	$	884,233	$	—	$	2,467,156
Special Mention	10,551		27,059		211		992		2,032		2,026		17,466		—		60,337
Substandard	5,912		2,327		6,058		2,948		480		776		27,621		—		46,122


Total Commercial and industrial loans	$	811,829	$	487,811	$	194,424	$	78,731	$	27,279	$	44,221	$	929,320	$	—	$	2,573,615
Agricultural land, production and other loans to farmers
Pass	37,000		48,740		23,447		9,152		7,451		39,875		63,254		—		228,919
Special Mention	84		1,561		—		—		—		391		274		—		2,310
Substandard	719		538		137		1,798		—		2,925		3,340		—		9,457


Total Agricultural land, production and other loans to farmers	$	37,803	$	50,839	$	23,584	$	10,950	$	7,451	$	43,191	$	66,868	$	—	$	240,686
Real estate loans:
Construction
Pass	132,653		202,455		114,065		31,056		2,229		2,559		15,671				500,688
Special Mention	20,839		275		—		—		—		—		—		—		21,114
Substandard	—		25		—		62		—		—		—		—		87


Total Construction	$	153,492	$	202,755	$	114,065	$	31,118	$	2,229	$	2,559	$	15,671	$	—	$	521,889
Commercial real estate, non-owner occupied
Pass	455,140		740,465		228,864		132,584		127,045		156,901		26,696		—		1,867,695
Special Mention	52,739		172,621		—		98		—		2,698		—		—		228,156
Substandard	19,437		25,983		180		1,169		7,477		290		—		—		54,536


Total Commercial real estate, non-owner occupied	$	527,316	$	939,069	$	229,044	$	133,851	$	134,522	$	159,889	$	26,696	$	—	$	2,150,387
Commercial real estate, owner occupied
Pass	221,409		423,411		99,381		45,467		49,800		58,497		32,468		—		930,433
Special Mention	1,548		6,064		745		1,604		—		1,326		149		—		11,436
Substandard	1,687		4,565		—		53		2,413		1,854		—		—		10,572


Total Commercial real estate, owner occupied	$	224,644	$	434,040	$	100,126	$	47,124	$	52,213	$	61,677	$	32,617	$	—	$	952,441
Residential
Pass	263,658		381,258		115,505		80,009		60,398		235,365		4,306		44		1,140,543
Special Mention	874		1,131		464		27		229		2,200		5		—		4,930
Substandard	1,103		3,134		105		1,267		109		3,182		—		—		8,900


Total Residential	$	265,635	$	385,523	$	116,074	$	81,303	$	60,736	$	240,747	$	4,311	$	44	$	1,154,373
Home equity
Pass	68,318		21,473		2,315		2,374		1,419		3,982		427,901		195		527,977
Special Mention	—		87		—		9		—		17		1,378		—		1,491
Substandard	472		—		—		—		94		200		1,073		—		1,839


Total Home Equity	$	68,790	$	21,560	$	2,315	$	2,383	$	1,513	$	4,199	$	430,352	$	195	$	531,307
Individuals' loans for household and other personal expenditures
Pass	41,367		30,506		17,797		13,132		2,657		5,684		23,659		—		134,802
Special Mention	31		101		65		45		7		15		11		—		275
Substandard	—		3		—		—		—		13		—		—		16


Total Individuals' loans for household and other personal expenditures	$	41,398	$	30,610	$	17,862	$	13,177	$	2,664	$	5,712	$	23,670	$	—	$	135,093
Public finance and other commercial loans
Pass	203,809		179,913		100,892		39,236		107,674		129,488		20,773		—		781,785




Total Public finance and other commercial loans	$	203,809	$	179,913	$	100,892	$	39,236	$	107,674	$	129,488	$	20,773	$	—	$	781,785
Loans	$	2,334,716	$	2,732,120	$	898,386	$	437,873	$	396,281	$	691,683	$	1,550,278	$	239	$	9,041,576


	December 31, 2020
	Commercial Pass		Commercial Special Mention		Commercial Substandard		Commercial Doubtful		Commercial Loss		Consumer Performing		Consumer Non-Performing		Total
Commercial and industrial loans	$	2,562,077	$	117,503	$	97,119	$	—	$	—	$	—	$	—	$	2,776,699
Agricultural land, production and other loans to farmers	243,991		26,835		9,885		—		—		1,173		—		281,884
Real estate Loans:
Construction	446,846		10,445		5,549		—		—		21,763		120		484,723
Commercial real estate, non-owner occupied	1,979,827		160,304		80,818		—		—		—		—		2,220,949
Commercial real estate, owner occupied	907,566		17,641		33,294						—		—		958,501
Residential	199,338		2,261		7,058		—		—		1,020,687		5,397		1,234,741
Home equity	12,714		—		989		—		—		492,999		1,557		508,259
Individuals' loans for household and other personal expenditures	—		—		—		—		—		129,440		39		129,479

Public finance and other commercial loans	647,939		—		—		—		—		—		—		647,939
Loans	$	7,000,298	$	334,989	$	234,712	$	—	$	—	$	1,666,062	$	7,113	$	9,243,174

Total past due loans equaled $38.9 million as of September 30, 2021, a $33.9 million decrease from the total of $72.8 million for December 31, 2020. At September 30, 2021, 30-59 Days Past Due loans totaled $12.2 million, a decrease of $7.5 million from December 31, 2020. The primary decreases were in commercial and industrial and owner-occupied commercial real estate loans. At September 30, 2021, 60-89 Days Past Due loans totaled $3.5 million, a decrease of $7.6 million from December 31, 2020. The primary decrease was in commercial and industrial loans. At September 30, 2021, 90 Days or More Past Due loans totaled $23.2 million, a decrease of $18.8 million from December 31, 2020. The primary decrease was in non-owner occupied commercial real estate, due to the payoff of a $23.4 million relationship. This was offset by an increase in the commercial and industrial segment of $13.5 million due to one relationship, of $11.4 million, moving into non-accrual status. The tables below show a past due aging of the Corporation’s loan portfolio, by loan class, for the years indicated:


	September 30, 2021
	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due		Total		Loans > 90 Days or More Past Due And Accruing
Commercial and industrial loans	$	2,554,111	$	2,667	$	507	$	16,330	$	2,573,615	$	1
Agricultural land, production and other loans to farmers	240,660		—		—		26		240,686		—
Real estate loans:
Construction	521,889		—		—		—		521,889		—
Commercial real estate, non-owner occupied	2,142,055		4,698		424		3,210		2,150,387		—
Commercial real estate, owner occupied	950,676		393		1,017		355		952,441		—
Residential	1,147,965		2,982		1,195		2,231		1,154,373		111
Home equity	528,760		1,197		355		995		531,307		43
Individuals' loans for household and other personal expenditures	134,801		233		43		16		135,093		2

Public finance and other commercial loans	781,785		—		—		—		781,785		—
Loans	$	9,002,702	$	12,170	$	3,541	$	23,163	$	9,041,576	$	157


	December 31, 2020
	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due		Total		Loans > 90 Days or More Past Due And Accruing
Commercial and industrial loans	$	2,761,473	$	5,866	$	6,571	$	2,789	$	2,776,699	$	594
Agricultural land, production and other loans to farmers	280,615		146		226		897		281,884		—
Real estate loans:
Construction	484,706		—		17		—		484,723		—
Commercial real estate, non-owner occupied	2,184,681		2,525		2,109		31,634		2,220,949		—
Commercial real estate, owner occupied	951,561		4,854		180		1,906		958,501		—
Residential	1,226,779		3,269		1,429		3,264		1,234,741		133
Home equity	503,596		2,644		559		1,460		508,259		19
Individuals' loans for household and other personal expenditures	129,049		334		96		—		129,479		—

Public finance and other commercial loans	647,939		—		—		—		647,939		—
Loans	$	9,170,399	$	19,638	$	11,187	$	41,950	$	9,243,174	$	746

Loans are reclassified to a non-accruing status when, in management’s judgment, the collateral value and financial condition of the borrower do not justify accruing interest. All unpaid accrued interest is reversed against earnings when considered uncollectible and at the time accrual is discontinued. Payments subsequently received on non-accrual loans are applied to principal. A loan is returned to accrual status when principal and interest are no longer past due and collectability is probable, typically after a minimum of six consecutive months of performance.

The following table summarizes the Corporation’s non-accrual loans by loan class for the periods indicated:


	September 30, 2021				December 31, 2020
	Non-Accrual Loans		Non-Accrual Loans with no Allowance for Credit Losses		Non-Accrual Loans
Commercial and industrial loans	$	16,817	$	628	$	2,329
Agricultural land, production and other loans to farmers	119		—		1,012
Real estate loans:
Construction	15		—		123
Commercial real estate, non-owner occupied	26,176		3,816		46,316
Commercial real estate, owner occupied	1,002		545		3,040
Residential	5,556		797		6,517
Home equity	1,804		—		2,095
Individuals' loans for household and other personal expenditures	13		—		39

Loans	$	51,502	$	5,786	$	61,471

There was no interest income recognized on non-accrual loans for the three and nine months ended September 30, 2021 and 2020, respectively.

Determining fair value for collateral dependent loans requires obtaining a current independent appraisal of the collateral and applying a discount factor, which includes selling costs if applicable, to the value. The fair value of real estate is generally based on appraisals by qualified licensed appraisers. The appraisers typically determine the value of the real estate by utilizing an income or market valuation approach. If an appraisal is not available, the fair value may be determined by using a cash flow analysis. Fair value on other collateral such as business assets is typically ascertained by assessing, either singularly or some combination of, asset appraisals, accounts receivable aging reports, inventory listings and or customer financial statements. Both appraised values and values based on borrower’s financial information are discounted as considered appropriate based on age and quality of the information and current market conditions.

The following table presents the amortized cost basis of collateral dependent loans, which are individually evaluated to determine expected credit losses:


	September 30, 2021
	Commercial Real Estate		Residential Real Estate		Other		Total		Allowance on Collateral Dependent Loans
Commercial and industrial loans	$	—	$	—	$	17,450	$	17,450	$	4,985
Agricultural land, production and other loans to farmers	—		—		300		300		—
Real estate loans:
Construction	—		15		—		15		1
Commercial real estate, non-owner occupied	26,703		—		—		26,703		6,463
Commercial real estate, owner occupied	1,846		—		—		1,846		21
Residential	—		2,927		—		2,927		327
Home equity	—		402		—		402		66


Loans	$	28,549	$	3,344	$	17,750	$	49,643	$	11,863

As detailed in NOTE 1. GENERAL of these Notes to Consolidated Condensed Financial Statements, the Bank's banking regulators issued guidance in March 2020 encouraging financial institutions to work prudently with borrowers who are or may be unable to meet their contractual payment obligations due to the effects of COVID-19. Additionally, Section 4013 of the CARES Act had further provided that a qualified loan modification is exempt by law from classification as a troubled debt restructure as defined by GAAP, from the period beginning March 1, 2020 until the earlier of December 31, 2020 or the date that is 60 days after the date on which the national emergency concerning the COVID-19 outbreak under the National Emergencies Act (50 U.S.C. 1601 et seq.) terminates. In accordance with that guidance, the Bank has offered short-term modifications made in response to COVID-19 to borrowers who were current and otherwise not past due. These included short-term, 180 days or less, modifications in the form of payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant. The Consolidated Appropriations Act, 2021 extended the expiration date for COVID-related loan modifications exempt from troubled debt restructuring classification until the earlier of January 1, 2022, or 60 days after the termination of the national emergency. Details of the Corporation's modifications are included in the "LOAN QUALITY" section of Management’s Discussion and Analysis of Financial Condition and Results of Operations included in this Form 10-Q.

In certain loan restructuring situations, the Corporation may grant a concession to a debtor experiencing financial difficulty, resulting in a troubled debt restructuring. A concession is deemed to be granted when, as a result of the restructuring, the Corporation does not expect to collect all original amounts due, including interest accrued at the original contract rate. If the payment of principal at original maturity is primarily dependent on the value of collateral, the current value of the collateral is considered in determining whether the principal will be repaid.

The following tables summarize troubled debt restructures in the Corporation's loan portfolio that occurred during the three months and nine months ended September 30, 2021 and 2020, respectively.


			Three Months Ended September 30, 2021
	Pre- Modification Recorded Balance		Term Modification		Rate Modification		Post - Modification Recorded Balance		Number of Loans

Real estate loans:
Construction	$	16	$	—	$	16	$	16	1
Commercial real estate, non owner occupied	12,922		12,976		—		12,976		1




Total	$	12,938	$	12,976	$	16	$	12,992	2


			Three Months Ended September 30, 2020
	Pre- Modification Recorded Balance		Term Modification		Rate Modification		Post - Modification Recorded Balance		Number of Loans


Real estate loans:


Residential	$	2,314	$	2,275	$	51	$	2,326	30
Home Equity	307		212		95		307		2
Individuals' loans for household and other personal expenditures	19		19		—		19		2
Total	$	2,640	$	2,506	$	146	$	2,652	34


			Nine Months Ended September 30, 2021
	Pre- Modification Recorded Balance		Term Modification		Rate Modification		Combination		Post - Modification Recorded Balance		Number of Loans
Commercial and industrial loans	$	348	$	348	$	—	$	—	$	348	2
Real estate loans:
Construction	16		—		16		—		16		1
Commercial real estate, non owner occupied	12,922		12,976		—		—		12,976		1
Commercial real estate, owner occupied	21		—		—		21		21		1
Residential	691		449		126		118		693		9


Total	$	13,998	$	13,773	$	142	$	139	$	14,054	14



			Nine Months Ended September 30, 2020
	Pre- Modification Recorded Balance		Term Modification		Rate Modification		Combination		Post - Modification Recorded Balance		Number of Loans
Commercial and industrial loans	$	654	$	654	$	—	$	—	$	654	3
Agricultural land, production and other loans to farmers	458		458		—		—		458		1
Real estate loans:

Commercial real estate, owner occupied	107		107		—		—		107		1
Residential	2,614		2,276		163		224		2,663		36
Home Equity	307		211		96		—		307		2
Individuals' loans for household and other personal expenditures	19		19		—		—		19		2
Total	$	4,159	$	3,725	$	259	$	224	$	4,208	45

Loans secured by commercial real estate, non-owner occupied made up 99.9 percent of the post-modification balances of the troubled debt restructured loans that occurred during the three months ending September 30, 2021 and 92.3 percent for the nine months ending September 30, 2021.

The following tables summarize troubled debt restructures that occurred during the twelve months ended September 30, 2021 and 2020, that subsequently defaulted during the period indicated and remained in default at period end. For purposes of this schedule, a loan is considered in default if it is 30-days or more past due.


	Three Months Ended September 30, 2021			Nine Months Ended September 30, 2021
	Number of Loans	Recorded Balance		Number of Loans	Recorded Balance
Commercial and industrial loans	2	$	160	2	$	160
Real estate loans:

Residential	5	599		5	599


Total	7	$	759	7	$	759


	Three Months Ended September 30, 2020			Nine Months Ended September 30, 2020
	Number of Loans	Recorded Balance		Number of Loans	Recorded Balance
Commercial and industrial loans	1	$	317	2	$	585
Real estate loans:
Commercial real estate, non owner occupied	1	106		1	106



Total	2	$	423	3	$	691

Commercial troubled debt restructured loans risk graded special mention, substandard, doubtful and loss are individually evaluated for apparent loss and may result in a specific reserve allocation in the allowance for credit loss. Commercial troubled debt restructures that aren't individually evaluated for a specific reserve are included in the calculation of allowance for credit losses through the loan segment loss analysis.

For all consumer loan modifications, an evaluation to identify if a troubled debt restructure has occurred is performed prior to making the modification. Any subsequent deterioration is addressed through the charge-off process or through a specific reserve allocation included in the allowance for credit loss. Consumer troubled debt restructures that are not individually evaluated for a specific reserve are included in the calculation of the allowance for credit losses through the loan segment loss analysis. Consumer loans secured by residential real estate properties for which formal foreclosure proceedings are in process totaled $3.9 million and $5.1 million at September 30, 2021 and September 30, 2020, respectively.

Allowance for Credit Losses on Loans

The Allowance for Credit Losses on Loans ("ACL - Loans") is a valuation account that is deducted from the amortized cost basis of loans to present the net amount expected to be collected on loans over the contractual term. The ACL - Loans is adjusted by the provision for credit losses, which is reported in earnings, and reduced by charge offs for loans, net or recoveries. Provision for credit losses on loans reflects the totality of actions taken on all loans for a particular period including any necessary increases or decreases in the allowance related to changes in credit loss expectations associated with specific loans or pools of loans. Loans are charged off against the allowance when the uncollectibility of the loan is confirmed. Expected recoveries do not exceed the aggregate of amounts previously charged off and expected to be charged off.

The allowance represents the Corporation’s best estimate of current expected credit losses on loans using relevant available information, from internal and external sources, related to past events, current conditions, and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. The current expected credit loss ("CECL") calculation is performed and evaluated quarterly and losses are estimated over the expected life of the loan. The level of the allowance for credit losses is believed to be adequate to absorb all expected future losses inherent in the loan portfolio at the measurement date.

In calculating the allowance for credit losses, the loan portfolio was pooled into ten loan segments with similar risk characteristics. Common characteristics include the type or purpose of the loan, underlying collateral and historical/expected credit loss patterns. In developing the loan segments, the Corporation analyzed the degree of correlation in how loans within each portfolio respond when subjected to varying economic conditions and scenarios as well as other portfolio stress factors.

The expected credit losses are measured over the life of each loan segment utilizing the Probability of Default / Loss Given Default methodology combined with economic forecast models to estimate the current expected credit loss inherent in the loan portfolio. This approach is also leveraged to estimate the expected credit losses associated with unfunded loan commitments incorporating expected utilization rates.

The Corporation sub-segmented certain commercial portfolios by risk level and certain consumer portfolios by delinquency status where appropriate. The Corporation utilized a four-quarter reasonable and supportable economic forecast period followed by a six-quarter, straight-line reversion period to the historical macroeconomic mean for the remaining life of the loans. Econometric modeling was performed using historical default rates and a selection of economic forecast scenarios published by Moody’s to develop a range of estimated credit losses for which to determine the best credit loss estimate within. Macroeconomic factors utilized in the modeling process include the national unemployment rate, BBB US corporate index, CRE price index and the home price index.

The Corporation qualitatively adjusts model results for risk factors that are not inherently considered in the quantitative modeling process, but are nonetheless relevant in assessing the expected credit losses within the loan portfolio. These adjustments may increase or decrease the estimate of expected credit losses based upon the assessed level of risk for each qualitative factor. The various risks that may be considered in making qualitative adjustments include, among other things, the impact of (i) changes in the nature and volume of the loan portfolio, (ii) changes in the existence, growth and effect of any concentrations in credit, (iii) changes in lending policies and procedures, including changes in underwriting standards and practices for collections, write-offs, and recoveries, (iv) changes in the quality of the credit review function, (v) changes in the experience, ability and depth of lending management and staff, and (vi) other environmental factors such as regulatory, legal and technological considerations, as well as competition.

In some cases, management may determine that an individual loan exhibits unique risk characteristics which differentiate the loan from other loans within the loan segments. In such cases, the loans are evaluated for expected credit losses on an individual basis and excluded from the collective evaluation. Specific reserve allocations of the allowance for credit losses are determined by analyzing the borrower’s ability to repay amounts owed, collateral deficiencies, the relative risk grade of the loan and economic conditions affecting the borrower’s industry, among other things. A loan is considered to be collateral dependent when, based upon management's assessment, the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. In such cases, expected credit losses are based on the fair value of the collateral at the measurement date, adjusted for estimated selling costs if satisfaction of the loan depends on the sale of the collateral. The fair value of collateral supporting collateral dependent loans is evaluated on a quarterly basis.

No allowance for credit losses has been recognized for PPP loans as such loans are fully guaranteed by the Small Business Administration ("SBA").

The risk characteristics of the Corporation’s portfolio segments are as follows:

Commercial

Commercial lending is primarily based on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial loans are secured by the tangible assets being financed such as equipment or real estate or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee. Other loans may be unsecured, secured but under-collateralized or otherwise made on the basis of the enterprise value of an organization. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts due from its customers.

Commercial real estate

Commercial real estate loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts and the repayment of these loans is generally dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan. The Corporation monitors commercial real estate loans based on collateral and risk grade criteria, as well as the levels of owner-occupied versus non-owner occupied loans.

Construction

Construction loans are underwritten utilizing a combination of tools and techniques including feasibility and market studies, independent appraisals and appraisal reviews, absorption and interest rate sensitivity analysis as well as the financial analysis of the developer and all guarantors. Construction loans are monitored by either in house or third party inspectors limiting advances to a percentage of costs or stabilized project value. These loans frequently involve the disbursement of significant funds with the repayment dependent upon the successful completion and, where necessary, the future stabilization of the project. The predominant inherent risk of this portfolio is associated with the borrower's ability to successfully complete a project on time, within budget and stabilize the projected as originally projected.

Consumer and Residential

With respect to residential loans that are secured by 1-4 family residences, which are typically owner occupied, the Corporation generally establishes a maximum loan-to-value ratio and requires private mortgage insurance if that ratio is exceeded. Home equity loans are secured by a subordinate interest in 1-4 family residences, and consumer loans are secured by consumer assets such as automobiles or recreational vehicles. Some consumer loans, such as small installment loans and certain lines of credit, are unsecured. Repayment of these loans is primarily dependent on the personal income and credit rating of the borrowers and can also be impacted by changes in property values. Risk is mitigated by the fact that the loans are of smaller individual amounts and spread over a large number of borrowers.

The following tables summarize changes in the allowance for credit losses by loan segment for the three and nine months ended September 30, 2021:


	Three Months Ended September 30, 2021
	Commercial		Commercial Real Estate		Construction		Consumer & Residential		Total
Allowance for credit losses
Balances, June 30, 2021	$	63,681	$	72,701	$	17,077	$	46,316	$	199,775




Provision for credit losses	3,496		(3,850)		567		(213)		—

Recoveries on loans	204		370		—		261		835
Loans charged off	(137)		(115)		(4)		(382)		(638)
Balances, September 30, 2021	$	67,244	$	69,106	$	17,640	$	45,982	$	199,972


	Nine Months Ended September 30, 2021
	Commercial		Commercial Real Estate		Construction		Consumer		Residential		Consumer & Residential		Total
Allowance for credit losses
Balances, December 31, 2020	$	47,115	$	51,070	$	—	$	9,648	$	22,815	$	—	$	130,648
Credit risk reclassifications	—		(10,284)		10,284		(9,648)		(22,815)		32,463		—
Balances, December 31, 2020 after reclassifications	47,115		40,786		10,284		—		—		32,463		130,648
Impact of adopting ASC 326	20,024		34,925		8,805		—		—		10,301		74,055
Balances, January 1, 2021 Post-ASC 326 adoption	67,139		75,711		19,089		—		—		42,764		204,703
Provision for credit losses	666		(2,709)		(1,444)		—		—		3,487		—

Recoveries on loans	544		567		1		—		—		829		1,941
Loans charged off	(1,105)		(4,463)		(6)		—		—		(1,098)		(6,672)
Balances, September 30, 2021	$	67,244	$	69,106	$	17,640	$	—	$	—	$	45,982	$	199,972

Allowance for Loan Losses under prior GAAP ("Incurred Loss Model")

Prior to the adoption of ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments on January 1, 2021, the Corporation maintained an allowance for loan losses in accordance with the incurred loss model as disclosed in the Corporation's 2020 Annual Report on Form 10-K.

The following tables summarize changes in the allowance for loan losses by loan segment for the three and nine months ended September 30, 2020:


	Three Months Ended September 30, 2020
	Commercial		Commercial Real Estate		Consumer		Residential		Total
Allowance for loan losses:
Balances, June 30, 2020	$	44,678	$	46,918	$	8,445	$	21,078	$	121,119
Provision for losses	7,299		2,990		971		1,284		12,544
Recoveries on loans	197		46		54		130		427
Loans charged off	(6,827)		—		(92)		(445)		(7,364)
Balances, September 30, 2020	$	45,347	$	49,954	$	9,378	$	22,047	$	126,726


	Nine Months Ended September 30, 2020
	Commercial		Commercial Real Estate		Consumer		Residential		Total
Allowance for loan losses:
Balances, December 31, 2019	$	32,902	$	28,778	$	4,035	$	14,569	$	80,284
Provision for losses	19,240		21,129		5,678		8,144		54,191
Recoveries on loans	746		271		152		248		1,417
Loans charged off	(7,541)		(224)		(487)		(914)		(9,166)
Balances, September 30, 2020	$	45,347	$	49,954	$	9,378	$	22,047	$	126,726

The table below shows the Corporation’s allowance for loan losses under the incurred loss model and loan portfolio by loan segment as of December 31, 2020.


	December 31, 2020
	Commercial		Commercial Real Estate		Consumer		Residential		Total
Allowance Balances:
Individually evaluated for impairment	$	223	$	12,246	$	—	$	432	$	12,901
Collectively evaluated for impairment	46,892		38,824		9,648		22,383		117,747

Total Allowance for Loan Losses	$	47,115	$	51,070	$	9,648	$	22,815	$	130,648
Loan Balances:
Individually evaluated for impairment	$	1,258	$	51,605	$	2	$	3,291	$	56,156
Collectively evaluated for impairment	3,505,863		3,805,808		129,477		1,739,709		9,180,857
Loans acquired with deteriorated credit quality	577		5,584		—		—		6,161
Loans	$	3,507,698	$	3,862,997	$	129,479	$	1,743,000	$	9,243,174

The following tables show the composition of the Corporation’s impaired loans, related allowance under the incurred loss model and interest income recognized while impaired by loan class as of the periods indicated:


	December 31, 2020
	Unpaid Principal Balance		Recorded Investment		Related Allowance
Impaired loans with no related allowance:
Commercial and industrial loans	$	1,059	$	991	$	—

Real estate Loans:
Commercial real estate, non-owner occupied	4,958		4,694		—
Commercial real estate, owner occupied	2,125		1,310		—
Residential	957		816		—

Individuals' loans for household and other personal expenditures	2		2		—

Total	$	9,101	$	7,813	$	—
Impaired loans with related allowance:
Commercial and industrial loans	$	268	$	268	$	223
Agricultural land, production and other loans to farmers	640		562		3
Real estate Loans:
Commercial real estate, non-owner occupied	44,016		43,715		11,686
Commercial real estate, owner occupied	2,061		1,323		557
Residential	2,041		2,014		352
Home equity	487		461		80


Total	$	49,513	$	48,343	$	12,901
Total Impaired Loans	$	58,614	$	56,156	$	12,901


	Three Months Ended September 30, 2020				Nine Months Ended September 30, 2020
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Impaired loans with no related allowance:
Commercial and industrial loans	$	8,625	$	—	$	9,225	$	—

Real estate Loans:

Commercial and farmland	10,812		37		11,059		113
Residential	58		1		59		2

Individuals' loans for household and other personal expenditures	3		—		3		—

Total	$	19,498	$	38	$	20,346	$	115
Impaired loans with related allowance:
Commercial and industrial loans	$	1,018	$	—	$	1,018	$	—

Real estate Loans:

Commercial and farmland	33,390		—		33,543		—
Residential	2,921		18		2,951		53
Home equity	482		4		488		11


Total	$	37,811	$	22	$	38,000	$	64
Total Impaired Loans	$	57,309	$	60	$	58,346	$	179

Off-Balance Sheet Arrangements, Commitments And Contingencies

In the normal course of business, the Corporation has entered into off-balance sheet financial instruments which include commitments to extend credit and standby letters of credit. Commitments to extend credit are usually the result of lines of credit granted to existing borrowers under agreements that the total outstanding indebtedness will not exceed a specific amount during the term of the indebtedness. Typical borrowers are commercial concerns that use lines of credit to supplement their treasury management functions, and thus their total outstanding indebtedness may fluctuate during any time period based on the seasonality of their business and the resultant timing for their cash flows. Other typical lines of credit are related to home equity loans granted to customers. Commitments to extend credit generally have fixed expiration dates or other termination clauses that may require a fee.

Standby letters of credit are generally issued on behalf of an applicant (the Corporation’s customer) to a specifically named beneficiary and are the result of a particular business arrangement that exists between the applicant and the beneficiary. Standby letters of credit have fixed expiration dates and are usually for terms of two years or less unless terminated beforehand due to criteria specified in the standby letter of credit. The standby letter of credit would permit the beneficiary to obtain payment from the Corporation under certain prescribed circumstances. Subsequently, the Corporation would seek reimbursement from the applicant pursuant to the terms of the standby letter of credit.

The Corporation typically follows the same credit policies and underwriting practices when making these commitments as it does for on-balance sheet instruments. Each customer’s creditworthiness is typically evaluated on a case-by-case basis, and the amount of collateral obtained, if any, is based on management’s credit evaluation of the customer. Collateral held varies but may include cash, real estate, marketable securities, accounts receivable, inventory, equipment and personal property.

The contractual amounts of these commitments are not reflected in the consolidated financial statements and only amounts drawn upon would be reflected in the future. Since many of the commitments are expected to expire without being drawn upon, the contractual amounts do not necessarily represent future cash requirements. However, should the commitments be drawn upon and should the Corporation’s customers default on their resulting obligation to the Corporation, the maximum exposure to credit loss, without consideration of collateral, is represented by the contractual amount of those commitments.

Financial instruments with off-balance sheet risk were as follows:


	September 30, 2021		December 31, 2020
Amounts of commitments:
Loan commitments to extend credit	$	3,938,075	$	3,443,514
Standby letters of credit	$	33,986	$	29,555

The adoption of the CECL methodology for measuring credit losses, as discussed more fully in the Allowance for Credit Loss on Loans section of this Note, and in NOTE 1. GENERAL of these Notes to Consolidated Condensed Financial Statements, increased the opening balance of our accrual for off-balance sheet commitments at adoption by $20.5 million. This reserve level remains appropriate and is reported in Other Liabilities as of September 30, 2021 in the CONSOLIDATED CONDENSED BALANCE SHEETS.

The following table details activity in the allowance for credit losses on off-balance sheet commitments:


	Three Months Ended September 30, 2021
Balances, June 30, 2021	$	20,500

Provision for credit losses	—
Balances, September 30, 2021	$	20,500

Goodwill

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

GOODWILL

Goodwill is recorded on the acquisition date of an entity. The Hoosier acquisition on April, 1, 2021 resulted in $1,467,000 of goodwill. Details regarding the Hoosier acquisition are discussed in NOTE 2. ACQUISITION of these Notes to Consolidated Condensed Financial Statements.


	2021		2020
Balance, January 1	$	543,918	$	543,918
Goodwill acquired	1,467		—


Balance, September 30	$	545,385	$	543,918

Other Intangibles

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Other Intangibles

OTHER INTANGIBLES

Core deposit intangibles and other intangibles are recorded on the acquisition date of an entity. The Hoosier acquisition on April 1, 2021 resulted in a customer relationship intangible of $2,247,000. Details regarding the Hoosier acquisition are discussed in NOTE 2. ACQUISITION of these Notes to Consolidated Condensed Financial Statements. The carrying basis and accumulated amortization of recognized core deposit intangibles and other intangibles are noted below.


	September 30, 2021		December 31, 2020
Gross carrying amount	$	102,396	$	102,396

Other intangibles acquired	2,247		—

Accumulated amortization	(77,705)		(73,421)

Total core deposit and other intangibles	$	26,938	$	28,975

The core deposit intangibles and other intangibles are being amortized primarily on an accelerated basis over their estimated useful lives, generally over a period of ten years. Intangible asset amortization expense for the three and nine months ended September 30, 2021 was $1.5 million and $4.3 million, respectively, compared to $1.5 million and $4.5 million for the three and nine months ended September 30, 2020, respectively. Estimated future amortization expense is summarized as follows:


	Amortization Expense
2021	$	1,463
2022	5,402
2023	5,145
2024	4,510
2025	3,754
After 2025	6,664
	$	26,938

Derivative Financial Instruments

9 Months Ended

Sep. 30, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

DERIVATIVE FINANCIAL INSTRUMENTS

Risk Management Objective of Using Derivatives

The Corporation is exposed to certain risks arising from both its business operations and economic conditions. The Corporation principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Corporation manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and through the use of derivative financial instruments. Specifically, the Corporation enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Corporation’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Corporation’s known or expected cash payments principally related to certain variable-rate liabilities. The Corporation also has derivatives that are a result of a service the Corporation provides to certain qualifying customers, and, therefore, are not used to manage interest rate risk in the Corporation’s assets or liabilities. The Corporation manages a matched book with respect to its derivative instruments offered as a part of this service to its customers in order to minimize its net risk exposure resulting from such transactions.

Cash Flow Hedges of Interest Rate Risk

The Corporation’s objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish these objectives, the Corporation primarily uses interest rate swaps and interest rate caps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the payment of fixed amounts to a counterparty in exchange for the Corporation receiving variable payments over the life of the agreements without exchange of the underlying notional amount. Interest rate caps designated as cash flow hedges involve the receipt of variable amounts from a counterparty if interest rates rise above the strike rate on the contract in exchange for an up-front premium. As of September 30, 2021 and December 31, 2020, the Corporation had four interest rate swaps with a notional amount of $60.0 million that were designated as cash flow hedges.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During 2021, $26.0 million of the interest rate swaps were used to hedge the variable cash outflows (LIBOR-based) associated with existing trust preferred securities when the outflows converted from a fixed rate to variable rate in September 2012. In addition, $10.0 million of interest rate swaps were used to hedge the variable cash outflows (LIBOR-based) associated with one Federal Home Loan Bank advance. Finally, the remaining $24.0 million of interest rate swaps were used to hedge the variable cash outflows (Ameribor-based) associated with a brokered deposit. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the three and nine months ended September 30, 2021 and 2020, the Corporation did not recognize any ineffectiveness.

Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on the Corporation's variable-rate liabilities. During the next twelve months, the Corporation expects to reclassify $1.0 million from accumulated other comprehensive income to interest expense.

Non-designated Hedges

The Corporation does not use derivatives for trading or speculative purposes. Derivatives not designated as hedges are not speculative and result from a service the Corporation provides to certain customers. The Corporation executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies. Those interest rate swaps are simultaneously hedged by offsetting interest rate swaps that the Corporation executes with a third party, such that the Corporation minimizes its net risk exposure resulting from such transactions. As the interest rate swaps associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. As of September 30, 2021 and December 31, 2020, the notional amount of customer-facing swaps was approximately $1.0 billion and $985.0 million, respectively. These amounts are offset with third party counterparties, as described above.

Fair Values of Derivative Instruments on the Balance Sheet

The table below presents the fair value of the Corporation’s derivative financial instruments, as well as their classification on the Balance Sheet, as of September 30, 2021, and December 31, 2020.

Asset Derivatives

Liability Derivatives

September 30, 2021

December 31, 2020

September 30, 2021

December 31, 2020

Balance
Sheet
Location

Fair
Value

Balance
Sheet
Location

Fair
Value

Balance
Sheet
Location

Fair
Value

Balance
Sheet
Location

Fair
Value

Derivatives designated as hedging instruments:

Interest rate contracts

Other Assets

—

Other Assets

—

Other Liabilities

1,217

Other Liabilities

2,018

Derivatives not designated as hedging instruments:

Interest rate contracts

Other Assets

47,630

Other Assets

74,335

Other Liabilities

47,630

Other Liabilities

74,335

The amount of gain (loss) recognized in other comprehensive income is included in the table below for the periods indicated.


Derivatives in Cash Flow Hedging Relationships	Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)
	Three Months Ended				Nine Months Ended
	September 30, 2021		September 30, 2020		September 30, 2021		September 30, 2020
Interest Rate Products	$	(20)	$	8	$	22	$	(1,451)

Effect of Derivative Instruments on the Income Statement

The Corporation did not recognize any gains or losses from derivative financial instruments in the Consolidated Condensed Statements of Income for the three and nine months ended September 30, 2021 and 2020.

The amount of gain (loss) reclassified from other comprehensive income into income is included in the table below for the periods indicated.

Derivatives Designated as
Hedging Instruments under
FASB ASC 815-10

Location of Gain (Loss)
Recognized Income on
Derivative

Amount of Gain (Loss) Reclassed from Other Comprehensive Income into Income (Effective Portion)

Three Months Ended
September 30, 2021

Three Months Ended
September 30, 2020

Interest rate contracts

Interest Expense

(266)

(294)

Derivatives Designated as
Hedging Instruments under
FASB ASC 815-10

Location of Gain (Loss)
Recognized Income on
Derivative

Amount of Gain (Loss) Reclassed from Other Comprehensive Income into Income (Effective Portion)

Nine Months Ended
September 30, 2021

Nine Months Ended
September 30, 2020

Interest rate contracts

Interest Expense

(779)

(651)

The Corporation’s exposure to credit risk occurs because of nonperformance by its counterparties. The counterparties approved by the Corporation are usually financial institutions, which are well capitalized and have credit ratings through Moody’s and/or Standard & Poor’s at or above investment grade. The Corporation’s control of such risk is through quarterly financial reviews, comparing mark-to-market values with policy limitations, credit ratings and collateral pledging.

Credit-risk-related Contingent Features

The Corporation has agreements with certain of its derivative counterparties that contain a provision where if the Corporation fails to maintain its status as a well or adequately capitalized institution, then the Corporation could be required to terminate or fully collateralize all outstanding derivative contracts. Additionally, the Corporation has agreements with certain of its derivative counterparties that contain a provision where if the Corporation defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Corporation could also be declared in default on its derivative obligations. As of September 30, 2021, the termination value of derivatives in a net liability position related to these agreements was $41.7 million. As of September 30, 2021, the Corporation has minimum collateral posting thresholds with certain of its derivative counterparties and has posted collateral of $58.8 million. While the Corporation did not breach any of these provisions as of September 30, 2021, if it had, the Corporation could have been required to settle its obligations under the agreements at their termination value.

Disclosures About Fair Value of Assets and Liabilities

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Disclosures About Fair Value of Assets and Liabilities

DISCLOSURES ABOUT FAIR VALUE OF ASSETS AND LIABILITIES

The Corporation used fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The accounting guidance defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. ASC 820 applies only when other guidance requires or permits assets or liabilities to be measured at fair value; it does not expand the use of fair value in any new circumstances.

As defined in ASC 820, fair value is the price to sell an asset or transfer a liability in an orderly transaction between market participants. It represents an exit price at the measurement date. Market participants are buyers and sellers, who are independent, knowledgeable, and willing and able to transact in the principal (or most advantageous) market for the asset or liability being measured. Current market conditions, including imbalances between supply and demand, are considered in determining fair value. The Corporation values its assets and liabilities in the principal market where it sells the particular asset or transfers the liability with the greatest volume and level of activity. In the absence of a principal market, the valuation is based on the most advantageous market for the asset or liability (i.e., the market where the asset could be sold or the liability transferred at a price that maximizes the amount to be received for the asset or minimizes the amount to be paid to transfer the liability).

Valuation inputs refer to the assumptions market participants would use in pricing a given asset or liability. Inputs can be observable or unobservable. Observable inputs are those assumptions which market participants would use in pricing the particular asset or liability. These inputs are based on market data and are obtained from a source independent of the Corporation. Unobservable inputs are assumptions based on the Corporation’s own information or estimate of assumptions used by market participants in pricing the asset or liability. Unobservable inputs are based on the best and most current information available on the measurement date. All inputs, whether observable or unobservable, are ranked in accordance with a prescribed fair value hierarchy which gives the highest ranking to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest ranking to unobservable inputs for which there is little or no market activity (Level 3). Fair values for assets or liabilities classified as Level 2 are based on one or a combination of the following factors: (i) quoted prices for similar assets; (ii) observable inputs for the asset or liability, such as interest rates or yield curves; or (iii) inputs derived principally from or corroborated by observable market data. The level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on

the lowest level input that is significant to the fair value measurement in its entirety. The Corporation considers an input to be significant if it drives 10 percent or more of the total fair value of a particular asset or liability.

RECURRING MEASUREMENTS

Assets and liabilities are considered to be measured at fair value on a recurring basis if fair value is measured regularly (i.e., daily, weekly, monthly or quarterly). Recurring valuation occurs at a minimum on the measurement date. Assets and liabilities are considered to be measured at fair value on a nonrecurring basis if the fair value measurement of the instrument does not necessarily result in a change in the amount recorded on the balance sheet. Generally, nonrecurring valuation is the result of the application of other accounting pronouncements which require assets or liabilities to be assessed for impairment or recorded at the lower of cost or fair value. The fair value of assets or liabilities transferred in or out of Level 3 is measured on the transfer date, with any additional changes in fair value subsequent to the transfer considered to be realized or unrealized gains or losses.

Following is a description of the valuation methodologies used for instruments measured at fair value on a recurring basis and recognized in the

accompanying balance sheets, as well as the general classification of such instruments pursuant to the valuation hierarchy.

Investment Securities

Where quoted prices are available in an active market, securities are classified within Level 1 of the valuation hierarchy. The Corporation currently has no securities classified within Level 1 of the hierarchy. Where significant observable inputs, other than Level 1 quoted prices, are available, securities are classified within Level 2 of the valuation hierarchy. Level 2 securities include U.S. treasury securities, government-sponsored agency and mortgage-backed securities, state and municipal securities and corporate obligations securities. In certain cases where Level 1 or Level 2 inputs are not available, securities are classified within Level 3 of the hierarchy and include state and municipal securities, government-sponsored mortgage-backed securities and corporate obligations securities. Level 3 fair value for securities was determined using a discounted cash flow model that incorporated market estimates of interest rates and volatility in markets that have not been active.

Third party vendors compile prices from various sources and may apply such techniques as matrix pricing to determine the value of identical or similar investment securities (Level 2). Matrix pricing is a mathematical technique widely used in the banking industry to value investment securities without relying exclusively on quoted prices for specific investment securities but rather relying on the investment securities’ relationship to other benchmark quoted investment securities. Any investment security not valued based upon the methods above are considered Level 3.

Interest Rate Derivative Agreements

See information regarding the Corporation’s interest rate derivative products in NOTE 7. DERIVATIVE FINANCIAL INSTRUMENTS of these Notes to Consolidated Condensed Financial Statements.

The following table presents the fair value measurements of assets and liabilities recognized in the accompanying balance sheets measured at fair value on a recurring basis and the level within the ASC 820 fair value hierarchy in which the fair value measurements fall at September 30, 2021, and December 31, 2020.


			Fair Value Measurements Using:
September 30, 2021	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Available for sale securities:
U.S. Treasury	$	1,000	$	—	$	1,000	$	—
U.S. Government-sponsored agency securities	11,557		—		11,557		—
State and municipal	1,534,555		—		1,528,990		5,565
U.S. Government-sponsored mortgage-backed securities	823,137		—		823,133		4
Corporate obligations	4,329		—		4,298		31
Interest rate swap asset	47,630		—		47,630		—
Interest rate swap liability	48,847		—		48,847		—


			Fair Value Measurements Using:
December 31, 2020	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Available for sale securities:

U.S. Government-sponsored agency securities	$	2,430	$	—	$	2,430	$	—
State and municipal	1,257,885		—		1,255,441		2,444
U.S. Government-sponsored mortgage-backed securities	654,669		—		654,665		4

Corporate obligations	4,135		—		4,104		31

Interest rate swap asset	74,335		—		74,335		—
Interest rate swap liability	76,353		—		76,353		—

There were no gains or losses included in earnings that were attributable to the changes in unrealized gains or losses related to assets or

liabilities held at September 30, 2021 or December 31, 2020.

Level 3 Reconciliation

The following is a reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the accompanying

balance sheets using significant unobservable Level 3 inputs for the three and nine months ended September 30, 2021 and 2020.


	Available for Sale Securities
	Three Months Ended				Nine Months Ended
	September 30, 2021		September 30, 2020		September 30, 2021		September 30, 2020
Balance at beginning of the period	$	5,795	$	2,500	$	2,479	$	2,892


Included in other comprehensive income	(21)		75		333		25
Purchases, issuances and settlements	—		—		3,241		—

Principal payments	(174)		(88)		(453)		(430)
Ending balance	$	5,600	$	2,487	$	5,600	$	2,487

Transfers Between Levels

There were no transfers in or out of Level 3 for the three and nine months ended September 30, 2021 and 2020.

Nonrecurring Measurements

Following is a description of valuation methodologies used for instruments measured at fair value on a non-recurring basis and recognized in the accompanying balance sheets, as well as the general classification of such instruments pursuant to the valuation hierarchy for September 30, 2021, and December 31, 2020.


			Fair Value Measurements Using
September 30, 2021	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Collateral dependent loans	$	31,408	$	—	$	—	$	31,408
Other real estate owned	96		—		—		96


			Fair Value Measurements Using
December 31, 2020	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Collateral dependent loans	$	37,250	$	—	$	—	$	37,250
Other real estate owned	544		—		—		544

Impaired Loans (collateral dependent)

Loans for which it is probable that the Corporation will not collect all principal and interest due according to contractual terms are measured for impairment. Allowable methods for determining the amount of impairment include estimating fair value of the collateral for collateral dependent loans. If the impaired loan is identified as collateral dependent, then the fair value method of measuring the amount of impairment is utilized. This method requires obtaining a current independent appraisal of the collateral and applying a discount factor to the value. A portion of the allowance for loan losses is allocated to impaired loans if the value of such loans is deemed to be less than the unpaid balance. If these allocations cause the allowance for loan losses to increase, such increase is reported as a component of the provision for loan losses. Loan losses are charged against the allowance when management believes the uncollectability of the loan is confirmed. During 2020 and 2021, certain impaired loans were partially charged off or re-evaluated. Impaired loans that are collateral dependent are classified within Level 3 of the fair value hierarchy when impairment is determined using the fair value method.

Other Real Estate Owned

The fair value for impaired loans and other real estate owned is measured based on the value of the collateral securing those loans or real estate and is determined using several methods. The fair value of real estate is generally determined based on appraisals by qualified licensed appraisers. The appraisers typically determine the value of the real estate by utilizing an income or market valuation approach. If an appraisal is not available, the fair value may be determined by using a discounted cash flow analysis. Fair value on other collateral such as business assets is typically ascertained by assessing, either singularly or some combination of, asset appraisals, accounts receivable aging reports, inventory listings and/or customer financial statements. Both appraised values and values based on borrower’s financial information are discounted as considered appropriate based on age and quality of the information and current market conditions.

Unobservable (Level 3) Inputs

The following table presents quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements, other than goodwill, at September 30, 2021 and December 31, 2020.

September 30, 2021

Fair Value

Valuation Technique

Unobservable Inputs

Range (Weighted-Average)

State and municipal securities

5,565

Discounted cash flow

Maturity/Call date

1 month to 15 years

US Muni BQ curve

A- to BBB--

Discount rate

.75% - 4%

Weighted-average coupon

Corporate obligations and U.S. Government-sponsored mortgage-backed securities

Discounted cash flow

Risk free rate

3 month LIBOR

plus premium for illiquidity

plus 200bps

Weighted-average coupon

—%

Collateral dependent loans

31,408

Collateral based measurements

Discount to reflect current market conditions and ultimate collectability

0% - 10%

Weighted-average discount by loan balance

Other real estate owned

Appraisals

Discount to reflect current market conditions

0% - 72%

Weighted-average discount of other real estate owned balance

44%

December 31, 2020

Fair Value

Valuation Technique

Unobservable Inputs

Range (Weighted-Average)

State and municipal securities

2,444

Discounted cash flow

Maturity/Call date

1 month to 15 years

US Muni BQ curve

A- to BBB-

Discount rate

1.50% - 4%

Weighted-average coupon

Corporate obligations and U.S Government-sponsored mortgage-backed securities

Discounted cash flow

Risk free rate

3 month LIBOR

plus premium for illiquidity

plus 200bps

Weighted-average coupon

—%

Impaired loans (collateral dependent)

37,250

Collateral based measurements

Discount to reflect current market conditions and ultimate collectability

0% - 10%

Weighted-average discount by loan balance

Other real estate owned

544

Appraisals

Discount to reflect current market conditions

0% - 30%

Weighted-average discount of other real estate owned balance

26%

The following is a discussion of the sensitivity of significant unobservable inputs, the interrelationships between those inputs and other unobservable inputs used in recurring fair value measurement and how those inputs might magnify or mitigate the effect of changes in the unobservable inputs on the fair value measurement.

State and Municipal Securities, Corporate Obligations and U.S. Government-sponsored Mortgage-Backed Securities

The significant unobservable inputs used in the fair value measurement of the Corporation's state and municipal securities, corporate obligations and U.S. Government-sponsored mortgage-backed securities are premiums for unrated securities and marketability discounts. Significant increases or decreases in either of those inputs in isolation would result in a significantly lower or higher fair value measurement. Generally, changes in either of those inputs will not affect the other input.

Fair Value of Financial Instruments

The following table presents estimated fair values of the Corporation’s financial instruments and the level within the fair value hierarchy in which the fair value measurements fall at September 30, 2021, and December 31, 2020.


			September 30, 2021
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	Carrying Amount		(Level 1)		(Level 2)		(Level 3)
Assets:
Cash and cash equivalents	$	169,261	$	169,261	$	—	$	—
Interest-bearing deposits	369,447		369,447		—		—
Investment securities available for sale	2,374,578		—		2,368,978		5,600
Investment securities held to maturity	2,070,938		—		2,071,246		15,309
Loans held for sale	5,990		—		5,990		—
Loans, net	8,841,604		—		—		8,900,412
Federal Home Loan Bank stock	28,736		—		28,736		—
Interest rate swap asset	47,630		—		47,630		—
Interest receivable	53,079		—		53,079		—
Liabilities:
Deposits	$	12,348,689	$	11,618,882	$	727,961	$	—
Borrowings:

Securities sold under repurchase agreements	183,589		—		183,584		—
Federal Home Loan Bank advances	334,149		—		339,704		—
Subordinated debentures and other borrowings	118,558		—		107,595		—
Interest rate swap liability	48,847		—		48,847		—
Interest payable	3,736		—		3,736		—


			December 31, 2020
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	Carrying Amount		(Level 1)		(Level 2)		(Level 3)
Assets:
Cash and cash equivalents	$	192,896	$	192,896	$	—	$	—
Interest-bearing deposits	392,305		392,305		—		—
Investment securities available for sale	1,919,119		—		1,916,640		2,479
Investment securities held to maturity	1,227,668		—		1,260,815		19,478
Loans held for sale	3,966		—		3,966		—
Loans, net	9,112,526		—		—		9,191,628
Federal Home Loan Bank stock	28,736		—		28,736		—
Interest rate swap asset	74,335		—		74,335		—
Interest receivable	53,948		—		53,948		—
Liabilities:
Deposits	$	11,361,610	$	10,482,865	$	878,257	$	—
Borrowings:

Securities sold under repurchase agreements	177,102		—		177,097		—
Federal Home Loan Bank advances	389,430		—		399,991		—
Subordinated debentures and other borrowings	118,380		—		108,439		—
Interest rate swap liability	76,353		—		76,353		—
Interest payable	3,287		—		3,287		—

Transfers Accounted for as Secured Borrowings

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Transfers Accounted for as Secured Borrowings

9 Months Ended

Sep. 30, 2021

Transfers and Servicing [Abstract]

TRANSFERS ACCOUNTED FOR AS SECURED BORROWINGS

The collateral pledged for all repurchase agreements that are accounted for as secured borrowings as of September 30, 2021 and December 31, 2020 were:


	September 30, 2021
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater Than 90 Days		Total
U.S. Government-sponsored mortgage-backed securities	$	183,589	$	—	$	—	$	—	$	183,589


	December 31, 2020
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater Than 90 Days		Total
U.S. Government-sponsored mortgage-backed securities	$	175,449	$	—	$	1,653	$	—	$	177,102

Accumulated Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following table summarizes the changes in the balances of each component of accumulated other comprehensive income (loss), net of tax, as of September 30, 2021 and 2020:


	Accumulated Other Comprehensive Income (Loss)
	Unrealized Gains (Losses) on Securities Available for Sale		Unrealized Gains (Losses) on Cash Flow Hedges		Unrealized Gains (Losses) on Defined Benefit Plans		Total
Balance at December 31, 2020	$	87,988	$	(1,594)	$	(11,558)	$	74,836
Other comprehensive income (loss) before reclassifications	(31,379)		17		—		(31,362)
Amounts reclassified from accumulated other comprehensive income	(4,200)		615		—		(3,585)
Period change	(35,579)		632		—		(34,947)

Balance at September 30, 2021	$	52,409	$	(962)	$	(11,558)	$	39,889


Balance at December 31, 2019	$	38,872	$	(1,141)	$	(9,857)	$	27,874
Other comprehensive income (loss) before reclassifications	45,729		(1,146)		—		44,583
Amounts reclassified from accumulated other comprehensive income	(7,503)		514		—		(6,989)
Period change	38,226		(632)		—		37,594

Balance at September 30, 2020	$	77,098	$	(1,773)	$	(9,857)	$	65,468

The following table presents the reclassification adjustments out of accumulated other comprehensive income (loss) that were included in net income in the Consolidated Condensed Statements of Income for the three and nine months ended September 30, 2021 and 2020.


	Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Three Months Ended September 30,
Details about Accumulated Other Comprehensive Income (Loss) Components	2021		2020		Affected Line Item in the Statements of Income
Unrealized gains (losses) on available for sale securities (1)
Realized securities gains reclassified into income	$	1,756	$	1,817	Other income - net realized gains on sales of available for sale securities
Related income tax expense	(369)		(382)		Income tax expense
	$	1,387	$	1,435

Unrealized gains (losses) on cash flow hedges (2)
Interest rate contracts	$	(266)	$	(294)	Interest expense - subordinated debentures and term loans
Related income tax benefit	56		62		Income tax expense
	$	(210)	$	(232)






Total reclassifications for the period, net of tax	$	1,177	$	1,203




	Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Nine Months Ended September 30,
Details about Accumulated Other Comprehensive Income (Loss) Components	2021		2020		Affected Line Item in the Statements of Income
Unrealized gains (losses) on available for sale securities (1)
Realized securities gains reclassified into income	$	5,316	$	9,497	Other income - net realized gains on sales of available for sale securities
Related income tax expense	(1,116)		(1,994)		Income tax expense
	$	4,200	$	7,503

Unrealized gains (losses) on cash flow hedges (2)
Interest rate contracts	$	(779)	$	(651)	Interest expense - subordinated debentures and term loans
Related income tax benefit	164		137		Income tax expense
	$	(615)	$	(514)






Total reclassifications for the period, net of tax	$	3,585	$	6,989

(1) For additional detail related to unrealized gains (losses) on available for sale securities and related amounts reclassified from accumulated other comprehensive income see NOTE 3. INVESTMENT SECURITIES of these Notes to Consolidated Condensed Financial Statements.

(2) For additional detail related to unrealized gains (losses) on cash flow hedges and related amounts reclassified from accumulated other comprehensive income see NOTE 7. DERIVATIVE FINANCIAL INSTRUMENTS of these Notes to Consolidated Condensed Financial Statements.

Share-Based Compensation

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Share-Based Compensation

SHARE-BASED COMPENSATION

Stock options and RSAs have been issued to directors, officers and other management employees under the Corporation's 2009 Long-term Equity Incentive Plan, the 2019 Long-term Equity Incentive Plan, and the Equity Compensation Plan for Non-Employee Directors. The stock options, which have a ten year life, become 100 percent vested based on time ranging from one year to two years and are fully exercisable when vested. Option exercise prices equal the Corporation's common stock closing price on NASDAQ on the date of grant. The RSAs issued to employees and non-employee directors provide for the issuance of shares of the Corporation's common stock at no cost to the holder and generally vest after 3 years. The RSAs vest only if the employee is actively employed by the Corporation on the vesting date and, therefore, any unvested shares are forfeited. For non-employee directors, the RSAs vest only if the non-employee director remains as an active board member on the vesting date and, therefore, any unvested shares are forfeited. The RSAs for employees and non-employee directors are either immediately vested at retirement, disability or death, or, continue to vest after retirement, disability or death, depending on the plan under which the shares were granted.

The Corporation’s 2019 ESPP provides eligible employees of the Corporation and its subsidiaries an opportunity to purchase shares of common stock of the Corporation through quarterly offerings financed by payroll deductions. The price of the stock to be paid by the employees shall be equal to 85 percent of the average of the closing price of the Corporation’s common stock on each trading day during the offering period. However, in no event shall such purchase price be less than the lesser of an amount equal to 85 percent of the market price of the Corporation’s stock on the offering date or an amount equal to 85 percent of the market value on the date of purchase. Common stock purchases are made quarterly and are paid through advance payroll deductions up to a calendar year maximum of $25,000.

Compensation expense related to unvested share-based awards is recorded by recognizing the unamortized grant date fair value of these awards over the remaining service periods of those awards, with no change in historical reported fair values and earnings. Awards are valued at

fair value in accordance with provisions of share-based compensation guidance and are recognized on a straight-line basis over the service periods of each award. To complete the exercise of vested stock options, RSA’s and ESPP options, the Corporation generally issues new shares from its authorized but unissued share pool. Share-based compensation for the three and nine months ended September 30, 2021 was $1,217,000 and $3,615,000, respectively, compared to $1,135,000 and $3,568,000, respectively, for the three and nine months ended September 30, 2020. Share-based compensation has been recognized as a component of salaries and benefits expense in the accompanying Consolidated Condensed Statements of Income.

Share-based compensation expense recognized in the Consolidated Condensed Statements of Income is based on awards ultimately expected to vest and is reduced for estimated forfeitures. Share-based compensation guidance requires forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods, if actual forfeitures differ from those estimates. Pre-vesting forfeitures were estimated to be approximately 0.5 percent for the nine months ended September 30, 2021, based on historical experience.

The following table summarizes the components of the Corporation's share-based compensation awards recorded as an expense and the income tax benefit of such awards.


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Stock and ESPP Options
Pre-tax compensation expense	$	16	$	23	$	131	$	76
Income tax expense (benefit)	—		—		(92)		(29)
Stock and ESPP option expense, net of income taxes	$	16	$	23	$	39	$	47
Restricted Stock Awards
Pre-tax compensation expense	$	1,201	$	1,112	$	3,484	$	3,492
Income tax expense (benefit)	(136)		149		(619)		(344)
Restricted stock awards expense, net of income taxes	$	1,065	$	1,261	$	2,865	$	3,148
Total Share-Based Compensation
Pre-tax compensation expense	$	1,217	$	1,135	$	3,615	$	3,568
Income tax expense (benefit)	(136)		149		(711)		(373)
Total share-based compensation expense, net of income taxes	$	1,081	$	1,284	$	2,904	$	3,195

As of September 30, 2021, unrecognized compensation expense related to RSAs was $9.3 million and is expected to be recognized over a weighted-average period of 2.13 years. The Corporation did not have any unrecognized compensation expense related to stock options as of September 30, 2021.

Stock option activity under the Corporation's stock option plans as of September 30, 2021 and changes during the nine months ended September 30, 2021, were as follows:


	Number of Shares	Weighted-Average Exercise Price		Weighted Average Remaining Contractual Term (in Years)	Aggregate Intrinsic Value
Outstanding at January 1, 2021	45,800	$	15.00

Exercised	(17,300)	$	11.46

Outstanding September 30, 2021	28,500	$	17.14	1.75	$	703,905
Vested and Expected to Vest at September 30, 2021	28,500	$	17.14	1.75	$	703,905
Exercisable at September 30, 2021	28,500	$	17.14	1.75	$	703,905

The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the difference between the Corporation's closing stock price on the last trading day of the first nine months of 2021 and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their stock options on September 30, 2021. The amount of aggregate intrinsic value will change based on the fair market value of the Corporation's common stock.

The aggregate intrinsic value of stock options exercised during the nine months ended September 30, 2021 and 2020 was $559,000 and $197,000, respectively. Cash receipts of stock options exercised during this same period were $198,000 and $83,000, respectively.

The following table summarizes information on unvested RSAs outstanding as of September 30, 2021:


	Number of Shares	Weighted-Average Grant Date Fair Value
Unvested RSAs at January 1, 2021	357,883	$	36.30
Granted	147,406	$	42.37
Vested	(94,260)	$	48.31
Forfeited	(5,050)	$	36.56
Unvested RSAs at September 30, 2021	405,979	$	35.69

The grant date fair value of ESPP options was estimated to be approximately $16,000 at the beginning of the July 1, 2021 quarterly offering period. The ESPP options vested during the three months ending September 30, 2021, leaving no unrecognized compensation expense related to unvested ESPP options at September 30, 2021.

Income Tax

9 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

Income Tax

INCOME TAX

The following table summarizes the major components creating differences between income taxes at the federal statutory and the effective tax rate recorded in the consolidated statements of income for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,						Nine Months Ended September 30,
	2021			2020			2021			2020








Reconciliation of Federal Statutory to Actual Tax Expense:
Federal statutory income tax at 21%	$	12,984		$	8,785		$	39,082		$	24,612
Tax-exempt interest income	(4,196)			(3,403)			(11,795)			(9,624)

Share-based compensation	119			382			47			376
Tax-exempt earnings and gains on life insurance	(503)			(246)			(1,037)			(810)
Tax credits	(127)			(55)			(277)			(205)
CARES Act - NOL carryback rate differential	—			—			—			(1,178)
State Income Tax	678			311			2,252			561
Other	107			(153)			36			2
Actual Tax Expense	$	9,062		$	5,621		$	28,308		$	13,734

Effective Tax Rate	14.7		%	13.4		%	15.2		%	11.7		%

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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Organization, Consolidation and Presentation of Financial Statements [Abstract]

Net Income Per Share

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Net Income Per Share

NET INCOME PER SHARE

Basic net income per share is computed by dividing net income by the weighted-average shares outstanding during the reporting period. Diluted net income per share is computed by dividing net income by the combination of the weighted-average shares outstanding during the reporting period and all potentially dilutive common shares. Potentially dilutive common shares include stock options and RSAs issued under the Corporation's share-based compensation plans. Potentially dilutive common shares are excluded from the computation of diluted earnings per share in the periods where the effect would be antidilutive.

The following table reconciles basic and diluted net income per share for the three and nine months ended September 30, 2021 and 2020.


	Three Months Ended September 30,
	2021					2020
	Net Income		Weighted-Average Shares	Per Share Amount		Net Income		Weighted-Average Shares	Per Share Amount
Net income available to common stockholders	$	52,770	53,766,630	$	0.98	$	36,210	53,843,508	$	0.67
Effect of potentially dilutive stock options and restricted stock awards			193,135					127,090
Diluted net income per share	$	52,770	53,959,765	$	0.98	$	36,210	53,970,598	$	0.67



	Nine Months Ended September 30,
	2021					2020
	Net Income		Weighted-Average Shares	Per Share Amount		Net Income		Weighted-Average Shares	Per Share Amount
Net income available to common stockholders	$	157,798	53,883,945	$	2.93	$	103,465	54,111,848	$	1.91
Effect of potentially dilutive stock options and restricted stock awards			209,118					166,034
Diluted net income per share	$	157,798	54,093,063	$	2.92	$	103,465	54,277,882	$	1.91

For the three and nine months ended September 30, 2021 and 2020, there were no stock options with an option price greater than the average market price of the common shares.

General Litigation and Regulatory Examinations	9 Months Ended
General Litigation and Regulatory Examinations	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
General Litigation and Regulatory Examinations	GENERAL LITIGATION AND REGULATORY EXAMINATIONS The Corporation is subject to claims and lawsuits that arise primarily in the ordinary course of business. Additionally, the Corporation is also subject to periodic examinations by various regulatory agencies. It is the general opinion of management that the disposition or ultimate resolution of any such routine litigation or regulatory examinations will not have a material adverse effect on the consolidated financial position, results of operations and cash flow of the Corporation.

General (Policies)	9 Months Ended
General (Policies)	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Recent Accounting Changes Adopted in 2021 and New Accounting Pronouncements Not Yet Adopted	Recent Accounting Changes Adopted In 2021 The Corporation continually monitors potential accounting pronouncements and the following pronouncements have been deemed to have the most applicability to the Corporation's financial statements: FASB Accounting Standards Updates No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments Summary - The FASB issued Accounting Standards Update (ASU) No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This new guidance replaces the previous "incurred loss" model for measuring credit losses with an "expected life of loan loss" model, referred to as the CECL model. Under the CECL model, certain financial assets carried at amortized cost, such as loans held for investment and held-to-maturity debt securities, are required to be presented at the net amount expected to be collected. The measurement of expected credit losses is based on information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. This measurement takes place at the time the financial asset is first added to the balance sheet and periodically thereafter. This differs significantly from the “incurred loss” model, which delayed recognition until it is probable a loss had been incurred. The Corporation developed models that satisfy the requirements of the new standard which are governed by a system of internal controls and a cross-functional working group consisting of accounting, finance, and credit administration personnel. The loan portfolio was pooled into ten loan segments with similar risk characteristics for which the probability of default/loss given default methodology was applied. The Corporation utilized a one-year economic forecast period then reverted to historical macroeconomic levels for the remaining life of the portfolio. A baseline macroeconomic scenario, along with other scenarios, were used to develop a range of estimated credit losses for which to determine the best estimate within. The ASU was effective for SEC filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Pursuant to the CARES Act and the related joint statement of federal banking regulators (which also became effective as of March 27, 2020), and consistent with guidance from the SEC and FASB, the Corporation elected to delay implementation of ASU No. 2016-13, which was set to expire on December 31, 2020. However, the CAA (as discussed above) extended the temporary relief from CECL compliance to the earlier of the first day of the fiscal year that begins after the date on which the national emergency concerning COVID-19 terminates, or January 1, 2022. The Corporation elected to delay implementation of CECL following the approval of the CARES Act and, with the enactment of the CAA, the Corporation elected to adopt CECL on January 1, 2021. This allows the Corporation to utilize the CECL standard for the entire year of 2021, while its 2020 financial statements were prepared under the incurred loss model. As of the adoption and day one measurement date of January 1, 2021, the Corporation recorded a one-time cumulative-effect adjustment to retained earnings, net of income taxes, on the consolidated balance sheet of $68.0 million. The allowance increased 57 percent from December 31, 2020, or $74.1 million, because it covered expected credit losses over the life of the loan portfolio, which approximates four years, and it included an allowance on all purchased loans that were previously excluded from the allowance for loan losses calculation. CECL also requires the establishment of a reserve for potential losses from unfunded commitments that is recorded in other liabilities, separate from allowance for credit losses, which was approximately $20.5 million. An allowance for credit losses of $245,000 was recorded on the state and municipal securities classified as held to maturity based on applying the long-term historical credit loss rate, as published by Moody’s, for similarly rated securities. FASB Accounting Standards Updates No. 2019-11 - Codification Improvements to (Topic 326): Financial Instruments - Credit Losses Summary - The FASB issued ASU No. 2019-11, Codification Improvements to Topic 326, Financial Instruments - Credit Losses in order to address issues raised by stakeholders during the implementation of ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses of Financial Instruments. Among other narrow-scope improvements, the new ASU clarifies guidance around how to report expected recoveries. “Expected recoveries” describes a situation in which an organization recognizes a full or partial write-off of the amortized cost basis of a financial asset, but then later determines that the amount written off, or a portion of that amount, will in fact be recovered. While applying the credit losses standard, stakeholders questioned whether expected recoveries were permitted on assets that had already shown credit deterioration at the time of purchase (also known as PCD assets). In response to this question, the ASU permits organizations to record expected recoveries on PCD assets. In addition to other narrow technical improvements, the ASU also reinforces existing guidance that prohibits organizations from recording negative allowances for available-for-sale debt securities. The ASU includes effective dates and transition requirements that vary depending on whether or not an entity has already adopted ASU No. 2016-13. As discussed above, pursuant to the CARES Act, the Corporation elected to defer the adoption of CECL. Additionally, the 2021 Consolidated Appropriations Act ("CAA"), signed into law on December 27, 2020, amended the CARES Act by extending the temporary relief from CECL compliance to the earlier of the first day of the fiscal year that begins after the date on which the national emergency concerning COVID-19 terminates, or January 1, 2022. The Corporation elected to delay implementation of CECL following the approval of the CARES Act and, with the enactment of the CAA, the Corporation elected to adopt CECL on January 1, 2021. The adoption of this standard did not have a significant effect on the Corporation’s consolidated financial statements or disclosures. FASB Accounting Standards Update No. 2019-12 - Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes Summary - The FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which is expected to reduce cost and complexity related to the accounting for income taxes. The ASU removes specific exceptions to the general principles in Topic 740 in Generally Accepted Accounting Principles (GAAP). It eliminates the need for an organization to analyze whether the following apply in a given period: • Exception to the incremental approach for intraperiod tax allocation; • Exceptions to accounting for basis differences when there are ownership changes in foreign investments; and • Exception in interim period income tax accounting for year-to-date losses that exceed anticipated losses. The ASU also improves financial statement preparers’ application of income tax-related guidance and simplifies GAAP for: • Franchise taxes that are partially based on income; • Transactions with a government that result in a step up in the tax basis of goodwill • Separate financial statements of legal entities that are not subject to tax; and • Enacted changes in tax laws in interim periods. The ASU is part of the FASB’s simplification initiative to make narrow-scope simplifications and improvements to accounting standards through a series of short-term projects. For public business entities, the ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption of the ASU was permitted. The Corporation adopted this standard on January 1, 2021 and adoption of this standard did not have a significant effect on the Corporation's consolidated financial statements or disclosures. New Accounting Pronouncements Not Yet Adopted FASB Accounting Standards Updates - No. 2020-04 - Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting Summary - The FASB issued ASU No. 2020-04 to provide temporary optional guidance to ease the potential burden in accounting for reference rate reform. LIBOR and other interbank offered rates are widely used benchmarks or reference rates in the United States and globally. Trillions of dollars in loans, derivatives, and other financial contracts reference LIBOR, the benchmark interest rate banks use to make short-term loans to each other. With global capital markets expected to move away from LIBOR and other interbank offered rates and move toward rates that are more observable or transaction based and less susceptible to manipulation, the FASB launched a broad project in late 2018 to address potential accounting challenges expected to arise from the transition. The new guidance provides optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The ASU is intended to help stakeholders during the global market-wide reference rate transition period. Entities may apply this ASU as of the beginning of an interim period that includes the March 12, 2020 issuance date of the ASU, through December 31, 2022. The Corporation expects to adopt the practical expedients included in the ASU prior to December 31, 2022. The Corporation is implementing a transition plan to identify and modify its loans and other financial instruments with attributes that are either directly or indirectly influenced by LIBOR. The Corporation is assessing ASU 2020-04 and its impact on the Corporation's transition away from LIBOR for its loans and other financial instruments. FASB Accounting Standards Updates - Accounting Standards Update No. 2021-01 - Reference Rate Reform (Topic 848): Scope Summary - The FASB has published ASU 2021-01, Reference Rate Reform. ASU 2021-01 clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. The ASU also amends the expedients and exceptions in Topic 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition. An entity may elect to apply the amendments in this Update on a full retrospective basis as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or on a prospective basis to new modifications from any date within an interim period that includes or is subsequent to the date of the issuance of a final Update, up to the date that financial statements are available to be issued. If an entity elects to apply any of the amendments in this Update for an eligible hedging relationship, any adjustments as a result of those elections must be reflected as of the date the entity applies the election. The amendments in this Update do not apply to contract modifications made after December 31, 2022, new hedging relationships entered into after December 31, 2022, and existing hedging relationships evaluated for effectiveness in periods after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that apply certain optional expedients in which the accounting effects are recorded through the end of the hedging relationship (including periods after December 31, 2022). The Corporation is assessing ASU 2021-01 and its impact on the Corporation's transition away from LIBOR for its loans and other financial instruments.

General (Tables)

9 Months Ended

Sep. 30, 2021

Schedule of changes in accounting principles

The following table details the impact of the adoption of CECL on the Corporation's balance sheet as of January 1, 2021.


	December 31, 2020		Impact of CECL Adoption		January 1, 2021 Post-CECL Adoption
Assets:
Held to maturity securities	$	1,227,668	$	(245)	$	1,227,423
Loans	9,243,174		4,776		9,247,950
Allowance for credit losses - Loans	(130,648)		(74,055)		(204,703)
Net loans	9,112,526		(69,279)		9,043,247
Tax asset, deferred and receivable	12,340		21,984		34,324

Liabilities:
Allowance for credit losses on unfunded loan commitments	—		20,500		20,500

Stockholder's Equity:
Retained Earnings	788,578		(68,040)		720,538
			$	—

Acquisition (Tables)

9 Months Ended

Sep. 30, 2021

Business Combination and Asset Acquisition [Abstract]

Schedule of preliminary valuations of the fair value of assets acquired and liabilities assumed


	Fair Value
Cash and cash equivalents	$	292
Other assets	35
Other liabilities	(816)
Net tangible assets acquired	(489)
Customer relationship intangible	2,247
Goodwill	1,467
Purchase price	$	3,225

Investment Securities (Tables)

9 Months Ended

Sep. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of amortized cost, gross unrealized gains, gross unrealized losses and approximate fair value of investment securities


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available for sale at September 30, 2021
U.S. Treasury	$	1,000	$	—	$	—	$	1,000
U.S. Government-sponsored agency securities	11,500		57		—		11,557
State and municipal	1,466,349		72,152		3,946		1,534,555
U.S. Government-sponsored mortgage-backed securities	825,097		10,255		12,215		823,137
Corporate obligations	4,031		298		—		4,329

Total available for sale	$	2,307,977	$	82,762	$	16,161	$	2,374,578


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available for sale at December 31, 2020
U.S. Government-sponsored agency securities	$	2,380	$	50	$	—	$	2,430
State and municipal	1,168,711		89,420		246		1,257,885
U.S. Government-sponsored mortgage-backed securities	632,267		22,505		103		654,669
Corporate obligations	4,031		104		—		4,135

Total available for sale	$	1,807,389	$	112,079	$	349	$	1,919,119


	Amortized Cost		Allowance for Credit Losses		Net Carrying Amount		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Held to maturity at September 30, 2021
U.S. Government-sponsored agency securities	$	90,678	$	—	$	90,678	$	86	$	840	$	89,924
State and municipal	996,247		245		996,002		24,330		9,618		1,010,959
U.S. Government-sponsored mortgage-backed securities	982,758		—		982,758		10,353		8,939		984,172
Foreign investment	1,500		—		1,500		—		—		1,500
Total held to maturity	$	2,071,183	$	245	$	2,070,938	$	34,769	$	19,397	$	2,086,555


	Amortized Cost		Allowance for Credit Losses		Net Carrying Amount		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Held to maturity at December 31, 2020
U.S. Government-sponsored agency securities	$	31,087	$	—	$	31,087	$	10	$	113	$	30,984
State and municipal	619,927		—		619,927		34,978		32		654,873
U.S. Government-sponsored mortgage-backed securities	575,154		—		575,154		17,889		107		592,936
Foreign investment	1,500		—		1,500		—		—		1,500
Total held to maturity	$	1,227,668	$	—	$	1,227,668	$	52,877	$	252	$	1,280,293

Schedule of amortized cost of investment securities held to maturity aggregated by credit quality indicator

The following table summarizes the amortized cost of investment securities held to maturity at September 30, 2021, aggregated by credit quality indicator.


	Held to Maturity
	State and municipal		Other		Total
Credit Rating:
Aaa	$	90,991	$	60,678	$	151,669
Aa1	146,992		—		146,992
Aa2	161,730		—		161,730
Aa3	124,369		—		124,369
A1	88,277		—		88,277
A2	23,103		—		23,103
A3	1,066		—		1,066
Baa2	266		—		266
Non-rated	359,453		1,014,258		1,373,711
Total	$	996,247	$	1,074,936	$	2,071,183

Schedule of allowance for credit losses on investment securities held to maturity

The following table details activity in the allowance for credit losses on investment securities held to maturity during the nine months ended September 30, 2021.


	State and municipal
Allowance for Credit Losses:
Balance, December 31, 2020	$	—
Impact of adopting ASC 326	245
Provision for credit loss	—
Securities charged off	—
Recoveries on securities	—
Balance, September 30, 2021	$	245

Schedule of investment securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position


	Less than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Investment securities available for sale at September 30, 2021

State and municipal	$	273,742	$	3,938	$	501	$	8	$	274,243	$	3,946
U.S. Government-sponsored mortgage-backed securities	525,836		12,215		—		—		525,836		12,215

Total investment securities available for sale	$	799,578	$	16,153	$	501	$	8	$	800,079	$	16,161


	Less than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Investment securities available for sale at December 31, 2020

State and municipal	$	5,368	$	246	$	—	$	—	$	5,368	$	246
U.S. Government-sponsored mortgage-backed securities	9,651		103		—		—		9,651		103

Total investment securities available for sale	$	15,019	$	349	$	—	$	—	$	15,019	$	349

Schedule of investments in debt and equity securities reported in the financial statements at an amount less than their historical cost

Certain investment securities available for sale are reported in the financial statements at an amount less than their historical cost as indicated in the table below.


	September 30, 2021			December 31, 2020
Investments available for sale reported at less than historical cost:
Historical cost	$	816,240		$	15,368
Fair value	800,079			15,019
Gross unrealized losses	$	16,161		$	349
Percent of the Corporation's investments available for sale	33.7		%	0.8		%

Schedule of amortized cost and fair value of available for sale securities and held to maturity securities


	Available for Sale				Held to Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Maturity Distribution at September 30, 2021
Due in one year or less	$	2,421	$	2,428	$	8,718	$	8,766
Due after one through five years	13,087		14,068		28,789		30,589
Due after five through ten years	100,122		105,457		176,603		180,790
Due after ten years	1,367,250		1,429,488		874,315		882,238
	1,482,880		1,551,441		1,088,425		1,102,383
U.S. Government-sponsored mortgage-backed securities	825,097		823,137		982,758		984,172

Total investment securities	$	2,307,977	$	2,374,578	$	2,071,183	$	2,086,555


	Available for Sale				Held to Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Maturity Distribution at December 31, 2020
Due in one year or less	$	1,349	$	1,353	$	9,712	$	9,755
Due after one through five years	5,545		5,764		22,241		23,190
Due after five through ten years	70,777		75,223		115,408		121,333
Due after ten years	1,097,451		1,182,110		505,153		533,079
	1,175,122		1,264,450		652,514		687,357
U.S. Government-sponsored mortgage-backed securities	632,267		654,669		575,154		592,936

Total investment securities	$	1,807,389	$	1,919,119	$	1,227,668	$	1,280,293

Schedule of gross gains and losses on sales and redemptions of available for sale securities

Gross gains and losses on the sales and redemptions of investment securities available for sale for the three and nine months ended September 30, 2021 and 2020 are shown below.


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Sales and redemptions of investment securities available for sale:
Gross gains	$	1,915	$	1,836	$	5,814	$	9,516
Gross losses	159		19		498		19

Net gains on sales and redemptions of investment securities available for sale	$	1,756	$	1,817	$	5,316	$	9,497

Loans and Allowance (Tables)

9 Months Ended

Sep. 30, 2021

Receivables [Abstract]

Schedule of composition of loan portfolio by loan class

The following table illustrates the composition of the Corporation’s loan portfolio by loan class for the periods indicated:


	September 30, 2021		December 31, 2020

Commercial and industrial loans	$	2,573,615	$	2,776,699
Agricultural land, production and other loans to farmers	240,686		281,884
Real estate loans:
Construction	521,889		484,723
Commercial real estate, non-owner occupied	2,150,387		2,220,949
Commercial real estate, owner occupied	952,441		958,501
Residential	1,154,373		1,234,741
Home equity	531,307		508,259
Individuals' loans for household and other personal expenditures	135,093		129,479
Public finance and other commercial loans	781,785		647,939
Loans	$	9,041,576	$	9,243,174

Schedule of credit quality and collateral of loan portfolio by loan class


	Term Loans (amortized cost basis by origination year)
	2021		2020		2019		2018		2017		Prior		Revolving loans amortized cost basis		Revolving loans converted to term		Total
Commercial and industrial loans
Pass	$	795,366	$	458,425	$	188,155	$	74,791	$	24,767	$	41,419	$	884,233	$	—	$	2,467,156
Special Mention	10,551		27,059		211		992		2,032		2,026		17,466		—		60,337
Substandard	5,912		2,327		6,058		2,948		480		776		27,621		—		46,122


Total Commercial and industrial loans	$	811,829	$	487,811	$	194,424	$	78,731	$	27,279	$	44,221	$	929,320	$	—	$	2,573,615
Agricultural land, production and other loans to farmers
Pass	37,000		48,740		23,447		9,152		7,451		39,875		63,254		—		228,919
Special Mention	84		1,561		—		—		—		391		274		—		2,310
Substandard	719		538		137		1,798		—		2,925		3,340		—		9,457


Total Agricultural land, production and other loans to farmers	$	37,803	$	50,839	$	23,584	$	10,950	$	7,451	$	43,191	$	66,868	$	—	$	240,686
Real estate loans:
Construction
Pass	132,653		202,455		114,065		31,056		2,229		2,559		15,671				500,688
Special Mention	20,839		275		—		—		—		—		—		—		21,114
Substandard	—		25		—		62		—		—		—		—		87


Total Construction	$	153,492	$	202,755	$	114,065	$	31,118	$	2,229	$	2,559	$	15,671	$	—	$	521,889
Commercial real estate, non-owner occupied
Pass	455,140		740,465		228,864		132,584		127,045		156,901		26,696		—		1,867,695
Special Mention	52,739		172,621		—		98		—		2,698		—		—		228,156
Substandard	19,437		25,983		180		1,169		7,477		290		—		—		54,536


Total Commercial real estate, non-owner occupied	$	527,316	$	939,069	$	229,044	$	133,851	$	134,522	$	159,889	$	26,696	$	—	$	2,150,387
Commercial real estate, owner occupied
Pass	221,409		423,411		99,381		45,467		49,800		58,497		32,468		—		930,433
Special Mention	1,548		6,064		745		1,604		—		1,326		149		—		11,436
Substandard	1,687		4,565		—		53		2,413		1,854		—		—		10,572


Total Commercial real estate, owner occupied	$	224,644	$	434,040	$	100,126	$	47,124	$	52,213	$	61,677	$	32,617	$	—	$	952,441
Residential
Pass	263,658		381,258		115,505		80,009		60,398		235,365		4,306		44		1,140,543
Special Mention	874		1,131		464		27		229		2,200		5		—		4,930
Substandard	1,103		3,134		105		1,267		109		3,182		—		—		8,900


Total Residential	$	265,635	$	385,523	$	116,074	$	81,303	$	60,736	$	240,747	$	4,311	$	44	$	1,154,373
Home equity
Pass	68,318		21,473		2,315		2,374		1,419		3,982		427,901		195		527,977
Special Mention	—		87		—		9		—		17		1,378		—		1,491
Substandard	472		—		—		—		94		200		1,073		—		1,839


Total Home Equity	$	68,790	$	21,560	$	2,315	$	2,383	$	1,513	$	4,199	$	430,352	$	195	$	531,307
Individuals' loans for household and other personal expenditures
Pass	41,367		30,506		17,797		13,132		2,657		5,684		23,659		—		134,802
Special Mention	31		101		65		45		7		15		11		—		275
Substandard	—		3		—		—		—		13		—		—		16


Total Individuals' loans for household and other personal expenditures	$	41,398	$	30,610	$	17,862	$	13,177	$	2,664	$	5,712	$	23,670	$	—	$	135,093
Public finance and other commercial loans
Pass	203,809		179,913		100,892		39,236		107,674		129,488		20,773		—		781,785




Total Public finance and other commercial loans	$	203,809	$	179,913	$	100,892	$	39,236	$	107,674	$	129,488	$	20,773	$	—	$	781,785
Loans	$	2,334,716	$	2,732,120	$	898,386	$	437,873	$	396,281	$	691,683	$	1,550,278	$	239	$	9,041,576


	December 31, 2020
	Commercial Pass		Commercial Special Mention		Commercial Substandard		Commercial Doubtful		Commercial Loss		Consumer Performing		Consumer Non-Performing		Total
Commercial and industrial loans	$	2,562,077	$	117,503	$	97,119	$	—	$	—	$	—	$	—	$	2,776,699
Agricultural land, production and other loans to farmers	243,991		26,835		9,885		—		—		1,173		—		281,884
Real estate Loans:
Construction	446,846		10,445		5,549		—		—		21,763		120		484,723
Commercial real estate, non-owner occupied	1,979,827		160,304		80,818		—		—		—		—		2,220,949
Commercial real estate, owner occupied	907,566		17,641		33,294						—		—		958,501
Residential	199,338		2,261		7,058		—		—		1,020,687		5,397		1,234,741
Home equity	12,714		—		989		—		—		492,999		1,557		508,259
Individuals' loans for household and other personal expenditures	—		—		—		—		—		129,440		39		129,479

Public finance and other commercial loans	647,939		—		—		—		—		—		—		647,939
Loans	$	7,000,298	$	334,989	$	234,712	$	—	$	—	$	1,666,062	$	7,113	$	9,243,174

The following table presents the amortized cost basis of collateral dependent loans, which are individually evaluated to determine expected credit losses:


	September 30, 2021
	Commercial Real Estate		Residential Real Estate		Other		Total		Allowance on Collateral Dependent Loans
Commercial and industrial loans	$	—	$	—	$	17,450	$	17,450	$	4,985
Agricultural land, production and other loans to farmers	—		—		300		300		—
Real estate loans:
Construction	—		15		—		15		1
Commercial real estate, non-owner occupied	26,703		—		—		26,703		6,463
Commercial real estate, owner occupied	1,846		—		—		1,846		21
Residential	—		2,927		—		2,927		327
Home equity	—		402		—		402		66


Loans	$	28,549	$	3,344	$	17,750	$	49,643	$	11,863

Schedule of past due aging of loan portfolio by loan class

The tables below show a past due aging of the Corporation’s loan portfolio, by loan class, for the years indicated:


	September 30, 2021
	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due		Total		Loans > 90 Days or More Past Due And Accruing
Commercial and industrial loans	$	2,554,111	$	2,667	$	507	$	16,330	$	2,573,615	$	1
Agricultural land, production and other loans to farmers	240,660		—		—		26		240,686		—
Real estate loans:
Construction	521,889		—		—		—		521,889		—
Commercial real estate, non-owner occupied	2,142,055		4,698		424		3,210		2,150,387		—
Commercial real estate, owner occupied	950,676		393		1,017		355		952,441		—
Residential	1,147,965		2,982		1,195		2,231		1,154,373		111
Home equity	528,760		1,197		355		995		531,307		43
Individuals' loans for household and other personal expenditures	134,801		233		43		16		135,093		2

Public finance and other commercial loans	781,785		—		—		—		781,785		—
Loans	$	9,002,702	$	12,170	$	3,541	$	23,163	$	9,041,576	$	157


	December 31, 2020
	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due		Total		Loans > 90 Days or More Past Due And Accruing
Commercial and industrial loans	$	2,761,473	$	5,866	$	6,571	$	2,789	$	2,776,699	$	594
Agricultural land, production and other loans to farmers	280,615		146		226		897		281,884		—
Real estate loans:
Construction	484,706		—		17		—		484,723		—
Commercial real estate, non-owner occupied	2,184,681		2,525		2,109		31,634		2,220,949		—
Commercial real estate, owner occupied	951,561		4,854		180		1,906		958,501		—
Residential	1,226,779		3,269		1,429		3,264		1,234,741		133
Home equity	503,596		2,644		559		1,460		508,259		19
Individuals' loans for household and other personal expenditures	129,049		334		96		—		129,479		—

Public finance and other commercial loans	647,939		—		—		—		647,939		—
Loans	$	9,170,399	$	19,638	$	11,187	$	41,950	$	9,243,174	$	746

Schedule of non-accrual loans by loan class

The following table summarizes the Corporation’s non-accrual loans by loan class for the periods indicated:


	September 30, 2021				December 31, 2020
	Non-Accrual Loans		Non-Accrual Loans with no Allowance for Credit Losses		Non-Accrual Loans
Commercial and industrial loans	$	16,817	$	628	$	2,329
Agricultural land, production and other loans to farmers	119		—		1,012
Real estate loans:
Construction	15		—		123
Commercial real estate, non-owner occupied	26,176		3,816		46,316
Commercial real estate, owner occupied	1,002		545		3,040
Residential	5,556		797		6,517
Home equity	1,804		—		2,095
Individuals' loans for household and other personal expenditures	13		—		39

Loans	$	51,502	$	5,786	$	61,471

Schedules of troubled debt restructurings

The following tables summarize troubled debt restructures in the Corporation's loan portfolio that occurred during the three months and nine months ended September 30, 2021 and 2020, respectively.


			Three Months Ended September 30, 2021
	Pre- Modification Recorded Balance		Term Modification		Rate Modification		Post - Modification Recorded Balance		Number of Loans

Real estate loans:
Construction	$	16	$	—	$	16	$	16	1
Commercial real estate, non owner occupied	12,922		12,976		—		12,976		1




Total	$	12,938	$	12,976	$	16	$	12,992	2


			Three Months Ended September 30, 2020
	Pre- Modification Recorded Balance		Term Modification		Rate Modification		Post - Modification Recorded Balance		Number of Loans


Real estate loans:


Residential	$	2,314	$	2,275	$	51	$	2,326	30
Home Equity	307		212		95		307		2
Individuals' loans for household and other personal expenditures	19		19		—		19		2
Total	$	2,640	$	2,506	$	146	$	2,652	34


			Nine Months Ended September 30, 2021
	Pre- Modification Recorded Balance		Term Modification		Rate Modification		Combination		Post - Modification Recorded Balance		Number of Loans
Commercial and industrial loans	$	348	$	348	$	—	$	—	$	348	2
Real estate loans:
Construction	16		—		16		—		16		1
Commercial real estate, non owner occupied	12,922		12,976		—		—		12,976		1
Commercial real estate, owner occupied	21		—		—		21		21		1
Residential	691		449		126		118		693		9


Total	$	13,998	$	13,773	$	142	$	139	$	14,054	14



			Nine Months Ended September 30, 2020
	Pre- Modification Recorded Balance		Term Modification		Rate Modification		Combination		Post - Modification Recorded Balance		Number of Loans
Commercial and industrial loans	$	654	$	654	$	—	$	—	$	654	3
Agricultural land, production and other loans to farmers	458		458		—		—		458		1
Real estate loans:

Commercial real estate, owner occupied	107		107		—		—		107		1
Residential	2,614		2,276		163		224		2,663		36
Home Equity	307		211		96		—		307		2
Individuals' loans for household and other personal expenditures	19		19		—		—		19		2
Total	$	4,159	$	3,725	$	259	$	224	$	4,208	45


	Three Months Ended September 30, 2021			Nine Months Ended September 30, 2021
	Number of Loans	Recorded Balance		Number of Loans	Recorded Balance
Commercial and industrial loans	2	$	160	2	$	160
Real estate loans:

Residential	5	599		5	599


Total	7	$	759	7	$	759


	Three Months Ended September 30, 2020			Nine Months Ended September 30, 2020
	Number of Loans	Recorded Balance		Number of Loans	Recorded Balance
Commercial and industrial loans	1	$	317	2	$	585
Real estate loans:
Commercial real estate, non owner occupied	1	106		1	106



Total	2	$	423	3	$	691

Schedule of changes in allowance for loan losses

The following tables summarize changes in the allowance for credit losses by loan segment for the three and nine months ended September 30, 2021:


	Three Months Ended September 30, 2021
	Commercial		Commercial Real Estate		Construction		Consumer & Residential		Total
Allowance for credit losses
Balances, June 30, 2021	$	63,681	$	72,701	$	17,077	$	46,316	$	199,775




Provision for credit losses	3,496		(3,850)		567		(213)		—

Recoveries on loans	204		370		—		261		835
Loans charged off	(137)		(115)		(4)		(382)		(638)
Balances, September 30, 2021	$	67,244	$	69,106	$	17,640	$	45,982	$	199,972


	Nine Months Ended September 30, 2021
	Commercial		Commercial Real Estate		Construction		Consumer		Residential		Consumer & Residential		Total
Allowance for credit losses
Balances, December 31, 2020	$	47,115	$	51,070	$	—	$	9,648	$	22,815	$	—	$	130,648
Credit risk reclassifications	—		(10,284)		10,284		(9,648)		(22,815)		32,463		—
Balances, December 31, 2020 after reclassifications	47,115		40,786		10,284		—		—		32,463		130,648
Impact of adopting ASC 326	20,024		34,925		8,805		—		—		10,301		74,055
Balances, January 1, 2021 Post-ASC 326 adoption	67,139		75,711		19,089		—		—		42,764		204,703
Provision for credit losses	666		(2,709)		(1,444)		—		—		3,487		—

Recoveries on loans	544		567		1		—		—		829		1,941
Loans charged off	(1,105)		(4,463)		(6)		—		—		(1,098)		(6,672)
Balances, September 30, 2021	$	67,244	$	69,106	$	17,640	$	—	$	—	$	45,982	$	199,972

Allowance for Loan Losses under prior GAAP ("Incurred Loss Model")

The following tables summarize changes in the allowance for loan losses by loan segment for the three and nine months ended September 30, 2020:


	Three Months Ended September 30, 2020
	Commercial		Commercial Real Estate		Consumer		Residential		Total
Allowance for loan losses:
Balances, June 30, 2020	$	44,678	$	46,918	$	8,445	$	21,078	$	121,119
Provision for losses	7,299		2,990		971		1,284		12,544
Recoveries on loans	197		46		54		130		427
Loans charged off	(6,827)		—		(92)		(445)		(7,364)
Balances, September 30, 2020	$	45,347	$	49,954	$	9,378	$	22,047	$	126,726


	Nine Months Ended September 30, 2020
	Commercial		Commercial Real Estate		Consumer		Residential		Total
Allowance for loan losses:
Balances, December 31, 2019	$	32,902	$	28,778	$	4,035	$	14,569	$	80,284
Provision for losses	19,240		21,129		5,678		8,144		54,191
Recoveries on loans	746		271		152		248		1,417
Loans charged off	(7,541)		(224)		(487)		(914)		(9,166)
Balances, September 30, 2020	$	45,347	$	49,954	$	9,378	$	22,047	$	126,726

Schedule of allowance for credit losses and loan portfolio by loan segment

The table below shows the Corporation’s allowance for loan losses under the incurred loss model and loan portfolio by loan segment as of December 31, 2020.


	December 31, 2020
	Commercial		Commercial Real Estate		Consumer		Residential		Total
Allowance Balances:
Individually evaluated for impairment	$	223	$	12,246	$	—	$	432	$	12,901
Collectively evaluated for impairment	46,892		38,824		9,648		22,383		117,747

Total Allowance for Loan Losses	$	47,115	$	51,070	$	9,648	$	22,815	$	130,648
Loan Balances:
Individually evaluated for impairment	$	1,258	$	51,605	$	2	$	3,291	$	56,156
Collectively evaluated for impairment	3,505,863		3,805,808		129,477		1,739,709		9,180,857
Loans acquired with deteriorated credit quality	577		5,584		—		—		6,161
Loans	$	3,507,698	$	3,862,997	$	129,479	$	1,743,000	$	9,243,174

Schedule of composition of impaired loans by loan class


	December 31, 2020
	Unpaid Principal Balance		Recorded Investment		Related Allowance
Impaired loans with no related allowance:
Commercial and industrial loans	$	1,059	$	991	$	—

Real estate Loans:
Commercial real estate, non-owner occupied	4,958		4,694		—
Commercial real estate, owner occupied	2,125		1,310		—
Residential	957		816		—

Individuals' loans for household and other personal expenditures	2		2		—

Total	$	9,101	$	7,813	$	—
Impaired loans with related allowance:
Commercial and industrial loans	$	268	$	268	$	223
Agricultural land, production and other loans to farmers	640		562		3
Real estate Loans:
Commercial real estate, non-owner occupied	44,016		43,715		11,686
Commercial real estate, owner occupied	2,061		1,323		557
Residential	2,041		2,014		352
Home equity	487		461		80


Total	$	49,513	$	48,343	$	12,901
Total Impaired Loans	$	58,614	$	56,156	$	12,901


	Three Months Ended September 30, 2020				Nine Months Ended September 30, 2020
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
Impaired loans with no related allowance:
Commercial and industrial loans	$	8,625	$	—	$	9,225	$	—

Real estate Loans:

Commercial and farmland	10,812		37		11,059		113
Residential	58		1		59		2

Individuals' loans for household and other personal expenditures	3		—		3		—

Total	$	19,498	$	38	$	20,346	$	115
Impaired loans with related allowance:
Commercial and industrial loans	$	1,018	$	—	$	1,018	$	—

Real estate Loans:

Commercial and farmland	33,390		—		33,543		—
Residential	2,921		18		2,951		53
Home equity	482		4		488		11


Total	$	37,811	$	22	$	38,000	$	64
Total Impaired Loans	$	57,309	$	60	$	58,346	$	179

Schedule of financial instruments with off-balance sheet risk

Financial instruments with off-balance sheet risk were as follows:


	September 30, 2021		December 31, 2020
Amounts of commitments:
Loan commitments to extend credit	$	3,938,075	$	3,443,514
Standby letters of credit	$	33,986	$	29,555

Schedule of allowance for credit losses, off-balance sheet

The following table details activity in the allowance for credit losses on off-balance sheet commitments:


	Three Months Ended September 30, 2021
Balances, June 30, 2021	$	20,500

Provision for credit losses	—
Balances, September 30, 2021	$	20,500

Goodwill (Tables)

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill


	2021		2020
Balance, January 1	$	543,918	$	543,918
Goodwill acquired	1,467		—


Balance, September 30	$	545,385	$	543,918

Other Intangibles (Tables)

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of core deposit intangibles

The carrying basis and accumulated amortization of recognized core deposit intangibles and other intangibles are noted below.


	September 30, 2021		December 31, 2020
Gross carrying amount	$	102,396	$	102,396

Other intangibles acquired	2,247		—

Accumulated amortization	(77,705)		(73,421)

Total core deposit and other intangibles	$	26,938	$	28,975

Schedule of estimated future amortization expense

Estimated future amortization expense is summarized as follows:


	Amortization Expense
2021	$	1,463
2022	5,402
2023	5,145
2024	4,510
2025	3,754
After 2025	6,664
	$	26,938

Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of fair value of derivative financial instruments and their classification on Balance Sheet

The table below presents the fair value of the Corporation’s derivative financial instruments, as well as their classification on the Balance Sheet, as of September 30, 2021, and December 31, 2020.

Asset Derivatives

Liability Derivatives

September 30, 2021

December 31, 2020

September 30, 2021

December 31, 2020

Balance
Sheet
Location

Fair
Value

Balance
Sheet
Location

Fair
Value

Balance
Sheet
Location

Fair
Value

Balance
Sheet
Location

Fair
Value

Derivatives designated as hedging instruments:

Interest rate contracts

Other Assets

—

Other Assets

—

Other Liabilities

1,217

Other Liabilities

2,018

Derivatives not designated as hedging instruments:

Interest rate contracts

Other Assets

47,630

Other Assets

74,335

Other Liabilities

47,630

Other Liabilities

74,335

Schedule of amount of gain (loss) recognized in other comprehensive income

The amount of gain (loss) recognized in other comprehensive income is included in the table below for the periods indicated.


Derivatives in Cash Flow Hedging Relationships	Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)
	Three Months Ended				Nine Months Ended
	September 30, 2021		September 30, 2020		September 30, 2021		September 30, 2020
Interest Rate Products	$	(20)	$	8	$	22	$	(1,451)

Schedule of amount of gain (loss) reclassified from other comprehensive income

The amount of gain (loss) reclassified from other comprehensive income into income is included in the table below for the periods indicated.

Derivatives Designated as
Hedging Instruments under
FASB ASC 815-10

Location of Gain (Loss)
Recognized Income on
Derivative

Amount of Gain (Loss) Reclassed from Other Comprehensive Income into Income (Effective Portion)

Three Months Ended
September 30, 2021

Three Months Ended
September 30, 2020

Interest rate contracts

Interest Expense

(266)

(294)

Derivatives Designated as
Hedging Instruments under
FASB ASC 815-10

Location of Gain (Loss)
Recognized Income on
Derivative

Amount of Gain (Loss) Reclassed from Other Comprehensive Income into Income (Effective Portion)

Nine Months Ended
September 30, 2021

Nine Months Ended
September 30, 2020

Interest rate contracts

Interest Expense

(779)

(651)

Disclosures About Fair Value of Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of fair value measurements of assets and liabilities recognized in Consolidated Condensed Balance Sheets measured at fair value


			Fair Value Measurements Using:
September 30, 2021	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Available for sale securities:
U.S. Treasury	$	1,000	$	—	$	1,000	$	—
U.S. Government-sponsored agency securities	11,557		—		11,557		—
State and municipal	1,534,555		—		1,528,990		5,565
U.S. Government-sponsored mortgage-backed securities	823,137		—		823,133		4
Corporate obligations	4,329		—		4,298		31
Interest rate swap asset	47,630		—		47,630		—
Interest rate swap liability	48,847		—		48,847		—


			Fair Value Measurements Using:
December 31, 2020	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Available for sale securities:

U.S. Government-sponsored agency securities	$	2,430	$	—	$	2,430	$	—
State and municipal	1,257,885		—		1,255,441		2,444
U.S. Government-sponsored mortgage-backed securities	654,669		—		654,665		4

Corporate obligations	4,135		—		4,104		31

Interest rate swap asset	74,335		—		74,335		—
Interest rate swap liability	76,353		—		76,353		—

Schedule of reconciliation of beginning and ending balances of recurring fair value measurements recognized in Consolidated Condensed Balance Sheets using significant unobservable Level 3 inputs

The following is a reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the accompanying

balance sheets using significant unobservable Level 3 inputs for the three and nine months ended September 30, 2021 and 2020.


	Available for Sale Securities
	Three Months Ended				Nine Months Ended
	September 30, 2021		September 30, 2020		September 30, 2021		September 30, 2020
Balance at beginning of the period	$	5,795	$	2,500	$	2,479	$	2,892


Included in other comprehensive income	(21)		75		333		25
Purchases, issuances and settlements	—		—		3,241		—

Principal payments	(174)		(88)		(453)		(430)
Ending balance	$	5,600	$	2,487	$	5,600	$	2,487

Schedule of description of valuation methodologies used for instruments measured at fair value on a non-recurring basis and recognized in Consolidated Condensed Balance Sheets


			Fair Value Measurements Using
September 30, 2021	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Collateral dependent loans	$	31,408	$	—	$	—	$	31,408
Other real estate owned	96		—		—		96


			Fair Value Measurements Using
December 31, 2020	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Collateral dependent loans	$	37,250	$	—	$	—	$	37,250
Other real estate owned	544		—		—		544

Schedule of unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements other than goodwill

September 30, 2021

Fair Value

Valuation Technique

Unobservable Inputs

Range (Weighted-Average)

State and municipal securities

5,565

Discounted cash flow

Maturity/Call date

1 month to 15 years

US Muni BQ curve

A- to BBB--

Discount rate

.75% - 4%

Weighted-average coupon

Corporate obligations and U.S. Government-sponsored mortgage-backed securities

Discounted cash flow

Risk free rate

3 month LIBOR

plus premium for illiquidity

plus 200bps

Weighted-average coupon

—%

Collateral dependent loans

31,408

Collateral based measurements

Discount to reflect current market conditions and ultimate collectability

0% - 10%

Weighted-average discount by loan balance

Other real estate owned

Appraisals

Discount to reflect current market conditions

0% - 72%

Weighted-average discount of other real estate owned balance

44%

December 31, 2020

Fair Value

Valuation Technique

Unobservable Inputs

Range (Weighted-Average)

State and municipal securities

2,444

Discounted cash flow

Maturity/Call date

1 month to 15 years

US Muni BQ curve

A- to BBB-

Discount rate

1.50% - 4%

Weighted-average coupon

Corporate obligations and U.S Government-sponsored mortgage-backed securities

Discounted cash flow

Risk free rate

3 month LIBOR

plus premium for illiquidity

plus 200bps

Weighted-average coupon

—%

Impaired loans (collateral dependent)

37,250

Collateral based measurements

Discount to reflect current market conditions and ultimate collectability

0% - 10%

Weighted-average discount by loan balance

Other real estate owned

544

Appraisals

Discount to reflect current market conditions

0% - 30%

Weighted-average discount of other real estate owned balance

26%

Schedule of estimated fair values of financial instruments


			September 30, 2021
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	Carrying Amount		(Level 1)		(Level 2)		(Level 3)
Assets:
Cash and cash equivalents	$	169,261	$	169,261	$	—	$	—
Interest-bearing deposits	369,447		369,447		—		—
Investment securities available for sale	2,374,578		—		2,368,978		5,600
Investment securities held to maturity	2,070,938		—		2,071,246		15,309
Loans held for sale	5,990		—		5,990		—
Loans, net	8,841,604		—		—		8,900,412
Federal Home Loan Bank stock	28,736		—		28,736		—
Interest rate swap asset	47,630		—		47,630		—
Interest receivable	53,079		—		53,079		—
Liabilities:
Deposits	$	12,348,689	$	11,618,882	$	727,961	$	—
Borrowings:

Securities sold under repurchase agreements	183,589		—		183,584		—
Federal Home Loan Bank advances	334,149		—		339,704		—
Subordinated debentures and other borrowings	118,558		—		107,595		—
Interest rate swap liability	48,847		—		48,847		—
Interest payable	3,736		—		3,736		—


			December 31, 2020
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	Carrying Amount		(Level 1)		(Level 2)		(Level 3)
Assets:
Cash and cash equivalents	$	192,896	$	192,896	$	—	$	—
Interest-bearing deposits	392,305		392,305		—		—
Investment securities available for sale	1,919,119		—		1,916,640		2,479
Investment securities held to maturity	1,227,668		—		1,260,815		19,478
Loans held for sale	3,966		—		3,966		—
Loans, net	9,112,526		—		—		9,191,628
Federal Home Loan Bank stock	28,736		—		28,736		—
Interest rate swap asset	74,335		—		74,335		—
Interest receivable	53,948		—		53,948		—
Liabilities:
Deposits	$	11,361,610	$	10,482,865	$	878,257	$	—
Borrowings:

Securities sold under repurchase agreements	177,102		—		177,097		—
Federal Home Loan Bank advances	389,430		—		399,991		—
Subordinated debentures and other borrowings	118,380		—		108,439		—
Interest rate swap liability	76,353		—		76,353		—
Interest payable	3,287		—		3,287		—

Transfers Accounted for as Secured Borrowings (Tables)

9 Months Ended

Sep. 30, 2021

Transfers and Servicing [Abstract]

Schedule of collateral pledged for all repurchase agreements accounted for as secured borrowings

The collateral pledged for all repurchase agreements that are accounted for as secured borrowings as of September 30, 2021 and December 31, 2020 were:


	September 30, 2021
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater Than 90 Days		Total
U.S. Government-sponsored mortgage-backed securities	$	183,589	$	—	$	—	$	—	$	183,589


	December 31, 2020
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater Than 90 Days		Total
U.S. Government-sponsored mortgage-backed securities	$	175,449	$	—	$	1,653	$	—	$	177,102

Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

Schedule of accumulated other comprehensive income (loss)

The following table summarizes the changes in the balances of each component of accumulated other comprehensive income (loss), net of tax, as of September 30, 2021 and 2020:


	Accumulated Other Comprehensive Income (Loss)
	Unrealized Gains (Losses) on Securities Available for Sale		Unrealized Gains (Losses) on Cash Flow Hedges		Unrealized Gains (Losses) on Defined Benefit Plans		Total
Balance at December 31, 2020	$	87,988	$	(1,594)	$	(11,558)	$	74,836
Other comprehensive income (loss) before reclassifications	(31,379)		17		—		(31,362)
Amounts reclassified from accumulated other comprehensive income	(4,200)		615		—		(3,585)
Period change	(35,579)		632		—		(34,947)

Balance at September 30, 2021	$	52,409	$	(962)	$	(11,558)	$	39,889


Balance at December 31, 2019	$	38,872	$	(1,141)	$	(9,857)	$	27,874
Other comprehensive income (loss) before reclassifications	45,729		(1,146)		—		44,583
Amounts reclassified from accumulated other comprehensive income	(7,503)		514		—		(6,989)
Period change	38,226		(632)		—		37,594

Balance at September 30, 2020	$	77,098	$	(1,773)	$	(9,857)	$	65,468

Schedule of reclassification out of accumulated other comprehensive income (loss)


	Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Three Months Ended September 30,
Details about Accumulated Other Comprehensive Income (Loss) Components	2021		2020		Affected Line Item in the Statements of Income
Unrealized gains (losses) on available for sale securities (1)
Realized securities gains reclassified into income	$	1,756	$	1,817	Other income - net realized gains on sales of available for sale securities
Related income tax expense	(369)		(382)		Income tax expense
	$	1,387	$	1,435

Unrealized gains (losses) on cash flow hedges (2)
Interest rate contracts	$	(266)	$	(294)	Interest expense - subordinated debentures and term loans
Related income tax benefit	56		62		Income tax expense
	$	(210)	$	(232)






Total reclassifications for the period, net of tax	$	1,177	$	1,203




	Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Nine Months Ended September 30,
Details about Accumulated Other Comprehensive Income (Loss) Components	2021		2020		Affected Line Item in the Statements of Income
Unrealized gains (losses) on available for sale securities (1)
Realized securities gains reclassified into income	$	5,316	$	9,497	Other income - net realized gains on sales of available for sale securities
Related income tax expense	(1,116)		(1,994)		Income tax expense
	$	4,200	$	7,503

Unrealized gains (losses) on cash flow hedges (2)
Interest rate contracts	$	(779)	$	(651)	Interest expense - subordinated debentures and term loans
Related income tax benefit	164		137		Income tax expense
	$	(615)	$	(514)






Total reclassifications for the period, net of tax	$	3,585	$	6,989

Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Schedule of components of share-based compensation awards

The following table summarizes the components of the Corporation's share-based compensation awards recorded as an expense and the income tax benefit of such awards.


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Stock and ESPP Options
Pre-tax compensation expense	$	16	$	23	$	131	$	76
Income tax expense (benefit)	—		—		(92)		(29)
Stock and ESPP option expense, net of income taxes	$	16	$	23	$	39	$	47
Restricted Stock Awards
Pre-tax compensation expense	$	1,201	$	1,112	$	3,484	$	3,492
Income tax expense (benefit)	(136)		149		(619)		(344)
Restricted stock awards expense, net of income taxes	$	1,065	$	1,261	$	2,865	$	3,148
Total Share-Based Compensation
Pre-tax compensation expense	$	1,217	$	1,135	$	3,615	$	3,568
Income tax expense (benefit)	(136)		149		(711)		(373)
Total share-based compensation expense, net of income taxes	$	1,081	$	1,284	$	2,904	$	3,195

Schedule of stock option activity under stock option plans

Stock option activity under the Corporation's stock option plans as of September 30, 2021 and changes during the nine months ended September 30, 2021, were as follows:


	Number of Shares	Weighted-Average Exercise Price		Weighted Average Remaining Contractual Term (in Years)	Aggregate Intrinsic Value
Outstanding at January 1, 2021	45,800	$	15.00

Exercised	(17,300)	$	11.46

Outstanding September 30, 2021	28,500	$	17.14	1.75	$	703,905
Vested and Expected to Vest at September 30, 2021	28,500	$	17.14	1.75	$	703,905
Exercisable at September 30, 2021	28,500	$	17.14	1.75	$	703,905

Schedule of unvested RSAs outstanding

The following table summarizes information on unvested RSAs outstanding as of September 30, 2021:


	Number of Shares	Weighted-Average Grant Date Fair Value
Unvested RSAs at January 1, 2021	357,883	$	36.30
Granted	147,406	$	42.37
Vested	(94,260)	$	48.31
Forfeited	(5,050)	$	36.56
Unvested RSAs at September 30, 2021	405,979	$	35.69

Income Tax (Tables)

9 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

Schedule of reconciliation of Federal Statutory to actual tax expense


	Three Months Ended September 30,						Nine Months Ended September 30,
	2021			2020			2021			2020








Reconciliation of Federal Statutory to Actual Tax Expense:
Federal statutory income tax at 21%	$	12,984		$	8,785		$	39,082		$	24,612
Tax-exempt interest income	(4,196)			(3,403)			(11,795)			(9,624)

Share-based compensation	119			382			47			376
Tax-exempt earnings and gains on life insurance	(503)			(246)			(1,037)			(810)
Tax credits	(127)			(55)			(277)			(205)
CARES Act - NOL carryback rate differential	—			—			—			(1,178)
State Income Tax	678			311			2,252			561
Other	107			(153)			36			2
Actual Tax Expense	$	9,062		$	5,621		$	28,308		$	13,734

Effective Tax Rate	14.7		%	13.4		%	15.2		%	11.7		%

Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Schedule of basic and diluted net income per share

The following table reconciles basic and diluted net income per share for the three and nine months ended September 30, 2021 and 2020.


	Three Months Ended September 30,
	2021					2020
	Net Income		Weighted-Average Shares	Per Share Amount		Net Income		Weighted-Average Shares	Per Share Amount
Net income available to common stockholders	$	52,770	53,766,630	$	0.98	$	36,210	53,843,508	$	0.67
Effect of potentially dilutive stock options and restricted stock awards			193,135					127,090
Diluted net income per share	$	52,770	53,959,765	$	0.98	$	36,210	53,970,598	$	0.67



	Nine Months Ended September 30,
	2021					2020
	Net Income		Weighted-Average Shares	Per Share Amount		Net Income		Weighted-Average Shares	Per Share Amount
Net income available to common stockholders	$	157,798	53,883,945	$	2.93	$	103,465	54,111,848	$	1.91
Effect of potentially dilutive stock options and restricted stock awards			209,118					166,034
Diluted net income per share	$	157,798	54,093,063	$	2.92	$	103,465	54,277,882	$	1.91

General - Narrative (Details) - USD ($)
$ in Thousands

Sep. 30, 2021

Jun. 30, 2021

Jan. 01, 2021

Dec. 31, 2020

Sep. 30, 2020

Jun. 30, 2020

Dec. 31, 2019

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

Retained earnings

$ (832,728)

$ (788,578)

Allowance for credit losses - Loans

199,972

^[1]

$ 199,775

130,648

^[1]

$ 126,726

$ 121,119

$ 80,284

Allowance for credit losses on unfunded loan commitments

20,500

$ 20,500

Allowance for credit losses

245

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

9,041,576

9,243,174

PPP loans

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

198,100

667,100

State and municipal

Allowance for credit losses

245

Cumulative effect of ASC 326 adoption

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

Retained earnings

$ 68,040

Percent of increase in allowance

57.00%

Allowance for credit losses - Loans

$ 74,055

74,055

Allowance for credit losses on unfunded loan commitments

$ 20,500

20,500

Cumulative effect of ASC 326 adoption | State and municipal

4,776

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

Allowance for credit losses

$ 245

[1]	Beginning January 1, 2021, the amount is based on the current expected credit loss methodology. Prior to January 1, 2021, the amount is based on the incurred loss methodology. See additional details in NOTE 1. GENERAL of these Notes to Consolidated Condensed Financial Statement.

General - Schedule of Changes in Accounting Principles (Details) - USD ($)
$ in Thousands

Sep. 30, 2021

Jun. 30, 2021

Jan. 01, 2021

Dec. 31, 2020

Sep. 30, 2020

Jun. 30, 2020

Dec. 31, 2019

Assets:

Held to maturity securities

$ 2,070,938

$ 1,227,668

9,041,576

9,243,174

(199,972)

^[1]

$ (199,775)

(130,648)

^[1]

$ (126,726)

$ (121,119)

$ (80,284)

8,841,604

9,112,526

Allowance for credit losses on unfunded loan commitments

39,504

12,340

Liabilities:

20,500

$ 20,500

Stockholder's Equity:

Retained Earnings

832,728

788,578

Impact of CECL Adoption

Assets:

Held to maturity securities

$ (245)

4,776

(74,055)

(69,279)

Allowance for credit losses on unfunded loan commitments

21,984

Liabilities:

$ 20,500

20,500

Stockholder's Equity:

Retained Earnings

(68,040)

January 1, 2021 Post-CECL Adoption

Assets:

Held to maturity securities

1,227,423

9,247,950

(204,703)

$ (204,703)

9,043,247

Allowance for credit losses on unfunded loan commitments

34,324

Liabilities:

20,500

Stockholder's Equity:

Retained Earnings

$ 720,538

[1]	Beginning January 1, 2021, the amount is based on the current expected credit loss methodology. Prior to January 1, 2021, the amount is based on the incurred loss methodology. See additional details in NOTE 1. GENERAL of these Notes to Consolidated Condensed Financial Statement.

Acquisition - Narrative (Details) - USD ($) $ in Thousands		9 Months Ended
Acquisition - Narrative (Details) - USD ($) $ in Thousands	Apr. 01, 2021	Sep. 30, 2021	Sep. 30, 2020
Business Acquisition [Line Items]
Cash paid in acquisition		$ 3,225	$ 0
Hoosier
Business Acquisition [Line Items]
Percentage of interest acquired	100.00%
Cash paid in acquisition	$ 3,225
Assets under management	290,000
Customer relationship intangible	2,247
Hoosier \| Customer relationship intangible
Business Acquisition [Line Items]
Customer relationship intangible	$ 2,247
Estimated life	10 years

Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Apr. 01, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill	$ 545,385		$ 543,918	$ 543,918	$ 543,918
Hoosier
Business Acquisition [Line Items]
Cash and cash equivalents		$ 292
Other assets		35
Other liabilities		(816)
Net tangible assets acquired		(489)
Customer relationship intangible		2,247
Goodwill		1,467
Purchase price		$ 3,225

Investment Securities - Amortized Cost and Approximate Fair Value of Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Available for sale securities
Amortized Cost	$ 2,307,977	$ 1,807,389
Gross Unrealized Gains	82,762	112,079
Gross Unrealized Losses	16,161	349
Fair Value	2,374,578	1,919,119
Held to maturity securities
Amortized Cost	2,071,183	1,227,668
Allowance for Credit Losses	245	0
Net Carrying Amount	2,070,938	1,227,668
Gross Unrealized Gains	34,769	52,877
Gross Unrealized Losses	19,397	252
Fair Value	2,086,555	1,280,293
U.S. Treasury
Available for sale securities
Amortized Cost	1,000
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	1,000
U.S. Government-sponsored agency securities
Available for sale securities
Amortized Cost	11,500	2,380
Gross Unrealized Gains	57	50
Gross Unrealized Losses	0	0
Fair Value	11,557	2,430
Held to maturity securities
Amortized Cost	90,678	31,087
Allowance for Credit Losses	0	0
Net Carrying Amount	90,678	31,087
Gross Unrealized Gains	86	10
Gross Unrealized Losses	840	113
Fair Value	89,924	30,984
State and municipal
Available for sale securities
Amortized Cost	1,466,349	1,168,711
Gross Unrealized Gains	72,152	89,420
Gross Unrealized Losses	3,946	246
Fair Value	1,534,555	1,257,885
Held to maturity securities
Amortized Cost	996,247	619,927
Allowance for Credit Losses	245	0
Net Carrying Amount	996,002	619,927
Gross Unrealized Gains	24,330	34,978
Gross Unrealized Losses	9,618	32
Fair Value	1,010,959	654,873
U.S. Government-sponsored mortgage-backed securities
Available for sale securities
Amortized Cost	825,097	632,267
Gross Unrealized Gains	10,255	22,505
Gross Unrealized Losses	12,215	103
Fair Value	823,137	654,669
Held to maturity securities
Amortized Cost	982,758	575,154
Allowance for Credit Losses	0	0
Net Carrying Amount	982,758	575,154
Gross Unrealized Gains	10,353	17,889
Gross Unrealized Losses	8,939	107
Fair Value	984,172	592,936
Corporate obligations
Available for sale securities
Amortized Cost	4,031	4,031
Gross Unrealized Gains	298	104
Gross Unrealized Losses	0	0
Fair Value	4,329	4,135
Foreign investment
Held to maturity securities
Amortized Cost	1,500	1,500
Allowance for Credit Losses	0	0
Net Carrying Amount	1,500	1,500
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	$ 1,500	$ 1,500

Investment Securities - Narrative (Details) $ in Thousands	Sep. 30, 2021 USD ($) instrument	Jan. 01, 2021 USD ($)	Dec. 31, 2020 USD ($)
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Accrued interest on investment securities	$ 22,800
Allowance for credit losses	245		$ 0
Gross unrealized losses	16,161		349
Carrying value of securities pledged as collateral	946,200		890,000
Securities sold under repurchase agreements	176,700		167,300
State and municipal
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Allowance for credit losses	245		0
Gross unrealized losses	$ 3,946		246
Number of securities in unrealized loss positions \| instrument	179
State and municipal \| Cumulative effect of ASC 326 adoption
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Allowance for credit losses		$ 245	245
U.S. Government-sponsored mortgage-backed securities
Schedule of Available for sale Securities and Held to maturity Securities [Line Items]
Allowance for credit losses	$ 0		0
Gross unrealized losses	$ 12,215		$ 103
Number of securities in unrealized loss positions \| instrument	49

Investment Securities - Amortized Cost of Investment Securities Held to Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 2,071,183	$ 1,227,668
Aaa
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	151,669
Aa1
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	146,992
Aa2
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	161,730
Aa3
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	124,369
A1
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	88,277
A2
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	23,103
A3
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,066
Baa2
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	266
Non-rated
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,373,711
State and municipal
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	996,247	$ 619,927
State and municipal \| Aaa
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	90,991
State and municipal \| Aa1
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	146,992
State and municipal \| Aa2
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	161,730
State and municipal \| Aa3
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	124,369
State and municipal \| A1
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	88,277
State and municipal \| A2
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	23,103
State and municipal \| A3
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,066
State and municipal \| Baa2
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	266
State and municipal \| Non-rated
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	359,453
Other
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,074,936
Other \| Aaa
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	60,678
Other \| Aa1
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	0
Other \| Aa2
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	0
Other \| Aa3
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	0
Other \| A1
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	0
Other \| A2
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	0
Other \| A3
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	0
Other \| Baa2
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	0
Other \| Non-rated
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 1,014,258

Investment Securities - Allowance for Credit Losses on Investment Securities Held to Maturity (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 0
Ending balance	245
State and municipal
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance	0
Provision for credit loss	0
Securities charged off	0
Recoveries on securities	0
Ending balance	245
State and municipal \| Cumulative effect of ASC 326 adoption
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 245

Investment Securities - Investments' Gross Unrealized Losses and Fair Value Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value
Less than 12 Months	$ 799,578	$ 15,019
12 Months or Longer	501	0
Total	800,079	15,019
Gross Unrealized Losses
Less than 12 Months	16,153	349
12 Months or Longer	8	0
Total	16,161	349
State and municipal
Fair Value
Less than 12 Months	273,742	5,368
12 Months or Longer	501	0
Total	274,243	5,368
Gross Unrealized Losses
Less than 12 Months	3,938	246
12 Months or Longer	8	0
Total	3,946	246
U.S. Government-sponsored mortgage-backed securities
Fair Value
Less than 12 Months	525,836	9,651
12 Months or Longer	0	0
Total	525,836	9,651
Gross Unrealized Losses
Less than 12 Months	12,215	103
12 Months or Longer	0	0
Total	$ 12,215	$ 103

Investment Securities - Investments in Debt and Equity Securities Reported Less than Historical Cost (Details) - Investments reported at less than historical cost - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Historical cost	$ 816,240	$ 15,368
Fair value	800,079	15,019
Gross unrealized losses	$ 16,161	$ 349
Percent of the Corporation's investments available for sale	33.70%	0.80%

Investment Securities - Amortized Cost and Fair Value of Available for Sale Securities and Held to Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Amortized Cost
Due in one year or less	$ 2,421	$ 1,349
Due after one through five years	13,087	5,545
Due after five through ten years	100,122	70,777
Due after ten years	1,367,250	1,097,451
Total debt securities with a single maturity date	1,482,880	1,175,122
Total investment securities	2,307,977	1,807,389
Fair Value
Due in one year or less	2,428	1,353
Due after one through five years	14,068	5,764
Due after five through ten years	105,457	75,223
Due after ten years	1,429,488	1,182,110
Total debt securities with a single maturity date	1,551,441	1,264,450
Total investment securities	2,374,578	1,919,119
Amortized Cost
Due in one year or less	8,718	9,712
Due after one through five years	28,789	22,241
Due after five through ten years	176,603	115,408
Due after ten years	874,315	505,153
Total debt securities with a single maturity date	1,088,425	652,514
Amortized Cost	2,071,183	1,227,668
Fair Value
Due in one year or less	8,766	9,755
Due after one through five years	30,589	23,190
Due after five through ten years	180,790	121,333
Due after ten years	882,238	533,079
Total debt securities with a single maturity date	1,102,383	687,357
Investment securities held to maturity	2,086,555	1,280,293
U.S. Government-sponsored mortgage-backed securities
Amortized Cost
Without single maturity date	825,097	632,267
Fair Value
Without single maturity date	823,137	654,669
Total investment securities	823,137	654,669
Amortized Cost
Without single maturity date	982,758	575,154
Amortized Cost	982,758	575,154
Fair Value
Without single maturity date	984,172	592,936
Investment securities held to maturity	$ 984,172	$ 592,936

Investment Securities - Gross Gains and Losses on Sales and Redemptions of Available for Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Sales and redemptions of investment securities available for sale:
Gross gains	$ 1,915	$ 1,836	$ 5,814	$ 9,516
Gross losses	159	19	498	19
Net gains on sales and redemptions of investment securities available for sale	$ 1,756	$ 1,817	$ 5,316	$ 9,497

Loans and Allowance - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
Loans and Allowance - Narrative (Details) - USD ($)	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Jan. 01, 2021	Dec. 31, 2020
Receivables [Abstract]
Loans held for sale	$ 5,990,000		$ 5,990,000				$ 3,966,000
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	9,041,576,000		9,041,576,000				9,243,174,000
Non-Accrual Loans	51,502,000		51,502,000				61,471,000
Interest income recognized on non-accrual loans	$ 0	$ 0	$ 0	$ 0
Standby letters of credit usual term	2 years		2 years
Allowance for credit losses on unfunded loan commitments	$ 20,500,000		$ 20,500,000		$ 20,500,000		0
Cumulative effect of ASC 326 adoption
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans						$ 4,776,000
Allowance for credit losses on unfunded loan commitments	20,500,000		20,500,000			$ 20,500,000
Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	38,900,000		38,900,000				72,800,000
Increase (decrease) in past due loans			33,900,000
30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	12,170,000		12,170,000				19,638,000
Increase (decrease) in past due loans			7,500,000
60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,541,000		3,541,000				11,187,000
Increase (decrease) in past due loans			7,600,000
90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	23,163,000		23,163,000				41,950,000
Increase (decrease) in past due loans			18,800,000
PPP loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	198,100,000		198,100,000				667,100,000
Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,150,387,000		2,150,387,000				2,220,949,000
Non-Accrual Loans	26,176,000		26,176,000				46,316,000
Commercial real estate, non-owner occupied \| 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,698,000		4,698,000				2,525,000
Commercial real estate, non-owner occupied \| 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	424,000		424,000				2,109,000
Commercial real estate, non-owner occupied \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,210,000		3,210,000				31,634,000
Payoff			23,400,000
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,573,615,000		2,573,615,000				2,776,699,000
Non-Accrual Loans	16,817,000		16,817,000				2,329,000
Commercial and industrial loans \| 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,667,000		2,667,000				5,866,000
Commercial and industrial loans \| 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	507,000		507,000				6,571,000
Commercial and industrial loans \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,330,000		16,330,000				2,789,000
Increase (decrease) in past due loans			(13,500,000)
Non-Accrual Loans	$ 11,400,000		$ 11,400,000
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of troubled debt restructured loans	9990.00%		9230.00%
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 1,154,373,000		$ 1,154,373,000				1,234,741,000
Non-Accrual Loans	5,556,000		5,556,000				6,517,000
Mortgage loans with formal foreclosure proceedings	3,900,000	$ 5,100,000	3,900,000	$ 5,100,000
Residential \| 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,982,000		2,982,000				3,269,000
Residential \| 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,195,000		1,195,000				1,429,000
Residential \| 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 2,231,000		$ 2,231,000				$ 3,264,000

Loans and Allowance - Composition of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 9,041,576	$ 9,243,174
Commercial and industrial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,573,615	2,776,699
Agricultural land, production and other loans to farmers
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	240,686	281,884
Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	521,889	484,723
Commercial real estate, non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,150,387	2,220,949
Commercial real estate, owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	952,441	958,501
Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,154,373	1,234,741
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	531,307	508,259
Individuals' loans for household and other personal expenditures
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	135,093	129,479
Public finance and other commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 781,785	$ 647,939

Loans and Allowance - Credit Quality of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	$ 2,334,716
2020	2,732,120
2019	898,386
2018	437,873
2017	396,281
Prior	691,683
Revolving loans amortized cost basis	1,550,278
Revolving loans converted to term	239
Loans	9,041,576	$ 9,243,174
Commercial Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		7,000,298
Commercial Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		334,989
Commercial Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		234,712
Commercial Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Commercial Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Consumer Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,666,062
Consumer Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		7,113
PPP loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	182,200
2020	15,900
Loans	198,100	667,100
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	811,829
2020	487,811
2019	194,424
2018	78,731
2017	27,279
Prior	44,221
Revolving loans amortized cost basis	929,320
Revolving loans converted to term	0
Loans	2,573,615	2,776,699
Commercial and industrial loans \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	795,366
2020	458,425
2019	188,155
2018	74,791
2017	24,767
Prior	41,419
Revolving loans amortized cost basis	884,233
Revolving loans converted to term	0
Loans	2,467,156
Commercial and industrial loans \| Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	10,551
2020	27,059
2019	211
2018	992
2017	2,032
Prior	2,026
Revolving loans amortized cost basis	17,466
Revolving loans converted to term	0
Loans	60,337
Commercial and industrial loans \| Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	5,912
2020	2,327
2019	6,058
2018	2,948
2017	480
Prior	776
Revolving loans amortized cost basis	27,621
Revolving loans converted to term	0
Loans	46,122
Commercial and industrial loans \| Commercial Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,562,077
Commercial and industrial loans \| Commercial Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		117,503
Commercial and industrial loans \| Commercial Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		97,119
Commercial and industrial loans \| Commercial Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Commercial and industrial loans \| Commercial Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Commercial and industrial loans \| Consumer Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Commercial and industrial loans \| Consumer Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Agricultural land, production and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	37,803
2020	50,839
2019	23,584
2018	10,950
2017	7,451
Prior	43,191
Revolving loans amortized cost basis	66,868
Revolving loans converted to term	0
Loans	240,686	281,884
Agricultural land, production and other loans to farmers \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	37,000
2020	48,740
2019	23,447
2018	9,152
2017	7,451
Prior	39,875
Revolving loans amortized cost basis	63,254
Revolving loans converted to term	0
Loans	228,919
Agricultural land, production and other loans to farmers \| Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	84
2020	1,561
2019	0
2018	0
2017	0
Prior	391
Revolving loans amortized cost basis	274
Revolving loans converted to term	0
Loans	2,310
Agricultural land, production and other loans to farmers \| Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	719
2020	538
2019	137
2018	1,798
2017	0
Prior	2,925
Revolving loans amortized cost basis	3,340
Revolving loans converted to term	0
Loans	9,457
Agricultural land, production and other loans to farmers \| Commercial Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		243,991
Agricultural land, production and other loans to farmers \| Commercial Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		26,835
Agricultural land, production and other loans to farmers \| Commercial Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		9,885
Agricultural land, production and other loans to farmers \| Commercial Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Agricultural land, production and other loans to farmers \| Commercial Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Agricultural land, production and other loans to farmers \| Consumer Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,173
Agricultural land, production and other loans to farmers \| Consumer Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	153,492
2020	202,755
2019	114,065
2018	31,118
2017	2,229
Prior	2,559
Revolving loans amortized cost basis	15,671
Revolving loans converted to term	0
Loans	521,889	484,723
Construction \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	132,653
2020	202,455
2019	114,065
2018	31,056
2017	2,229
Prior	2,559
Revolving loans amortized cost basis	15,671
Revolving loans converted to term
Loans	500,688
Construction \| Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	20,839
2020	275
2019	0
2018	0
2017	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term	0
Loans	21,114
Construction \| Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	0
2020	25
2019	0
2018	62
2017	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term	0
Loans	87
Construction \| Commercial Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		446,846
Construction \| Commercial Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		10,445
Construction \| Commercial Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		5,549
Construction \| Commercial Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Construction \| Commercial Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Construction \| Consumer Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		21,763
Construction \| Consumer Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		120
Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	527,316
2020	939,069
2019	229,044
2018	133,851
2017	134,522
Prior	159,889
Revolving loans amortized cost basis	26,696
Revolving loans converted to term	0
Loans	2,150,387	2,220,949
Commercial real estate, non-owner occupied \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	455,140
2020	740,465
2019	228,864
2018	132,584
2017	127,045
Prior	156,901
Revolving loans amortized cost basis	26,696
Revolving loans converted to term	0
Loans	1,867,695
Commercial real estate, non-owner occupied \| Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	52,739
2020	172,621
2019	0
2018	98
2017	0
Prior	2,698
Revolving loans amortized cost basis	0
Revolving loans converted to term	0
Loans	228,156
Commercial real estate, non-owner occupied \| Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	19,437
2020	25,983
2019	180
2018	1,169
2017	7,477
Prior	290
Revolving loans amortized cost basis	0
Revolving loans converted to term	0
Loans	54,536
Commercial real estate, non-owner occupied \| Commercial Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,979,827
Commercial real estate, non-owner occupied \| Commercial Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		160,304
Commercial real estate, non-owner occupied \| Commercial Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		80,818
Commercial real estate, non-owner occupied \| Commercial Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Commercial real estate, non-owner occupied \| Commercial Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Commercial real estate, non-owner occupied \| Consumer Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Commercial real estate, non-owner occupied \| Consumer Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Commercial real estate, owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	224,644
2020	434,040
2019	100,126
2018	47,124
2017	52,213
Prior	61,677
Revolving loans amortized cost basis	32,617
Revolving loans converted to term	0
Loans	952,441	958,501
Commercial real estate, owner occupied \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	221,409
2020	423,411
2019	99,381
2018	45,467
2017	49,800
Prior	58,497
Revolving loans amortized cost basis	32,468
Revolving loans converted to term	0
Loans	930,433
Commercial real estate, owner occupied \| Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	1,548
2020	6,064
2019	745
2018	1,604
2017	0
Prior	1,326
Revolving loans amortized cost basis	149
Revolving loans converted to term	0
Loans	11,436
Commercial real estate, owner occupied \| Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	1,687
2020	4,565
2019	0
2018	53
2017	2,413
Prior	1,854
Revolving loans amortized cost basis	0
Revolving loans converted to term	0
Loans	10,572
Commercial real estate, owner occupied \| Commercial Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		907,566
Commercial real estate, owner occupied \| Commercial Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		17,641
Commercial real estate, owner occupied \| Commercial Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		33,294
Commercial real estate, owner occupied \| Commercial Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Commercial real estate, owner occupied \| Commercial Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Commercial real estate, owner occupied \| Consumer Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Commercial real estate, owner occupied \| Consumer Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	265,635
2020	385,523
2019	116,074
2018	81,303
2017	60,736
Prior	240,747
Revolving loans amortized cost basis	4,311
Revolving loans converted to term	44
Loans	1,154,373	1,234,741
Residential \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	263,658
2020	381,258
2019	115,505
2018	80,009
2017	60,398
Prior	235,365
Revolving loans amortized cost basis	4,306
Revolving loans converted to term	44
Loans	1,140,543
Residential \| Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	874
2020	1,131
2019	464
2018	27
2017	229
Prior	2,200
Revolving loans amortized cost basis	5
Revolving loans converted to term	0
Loans	4,930
Residential \| Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	1,103
2020	3,134
2019	105
2018	1,267
2017	109
Prior	3,182
Revolving loans amortized cost basis	0
Revolving loans converted to term	0
Loans	8,900
Residential \| Commercial Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		199,338
Residential \| Commercial Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,261
Residential \| Commercial Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		7,058
Residential \| Commercial Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Residential \| Commercial Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Residential \| Consumer Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,020,687
Residential \| Consumer Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		5,397
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	68,790
2020	21,560
2019	2,315
2018	2,383
2017	1,513
Prior	4,199
Revolving loans amortized cost basis	430,352
Revolving loans converted to term	195
Loans	531,307	508,259
Home equity \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	68,318
2020	21,473
2019	2,315
2018	2,374
2017	1,419
Prior	3,982
Revolving loans amortized cost basis	427,901
Revolving loans converted to term	195
Loans	527,977
Home equity \| Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	0
2020	87
2019	0
2018	9
2017	0
Prior	17
Revolving loans amortized cost basis	1,378
Revolving loans converted to term	0
Loans	1,491
Home equity \| Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	472
2020	0
2019	0
2018	0
2017	94
Prior	200
Revolving loans amortized cost basis	1,073
Revolving loans converted to term	0
Loans	1,839
Home equity \| Commercial Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		12,714
Home equity \| Commercial Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Home equity \| Commercial Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		989
Home equity \| Commercial Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Home equity \| Commercial Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Home equity \| Consumer Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		492,999
Home equity \| Consumer Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,557
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	41,398
2020	30,610
2019	17,862
2018	13,177
2017	2,664
Prior	5,712
Revolving loans amortized cost basis	23,670
Revolving loans converted to term	0
Loans	135,093	129,479
Individuals' loans for household and other personal expenditures \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	41,367
2020	30,506
2019	17,797
2018	13,132
2017	2,657
Prior	5,684
Revolving loans amortized cost basis	23,659
Revolving loans converted to term	0
Loans	134,802
Individuals' loans for household and other personal expenditures \| Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	31
2020	101
2019	65
2018	45
2017	7
Prior	15
Revolving loans amortized cost basis	11
Revolving loans converted to term	0
Loans	275
Individuals' loans for household and other personal expenditures \| Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	0
2020	3
2019	0
2018	0
2017	0
Prior	13
Revolving loans amortized cost basis	0
Revolving loans converted to term	0
Loans	16
Individuals' loans for household and other personal expenditures \| Commercial Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Individuals' loans for household and other personal expenditures \| Commercial Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Individuals' loans for household and other personal expenditures \| Commercial Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Individuals' loans for household and other personal expenditures \| Commercial Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Individuals' loans for household and other personal expenditures \| Commercial Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Individuals' loans for household and other personal expenditures \| Consumer Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		129,440
Individuals' loans for household and other personal expenditures \| Consumer Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		39
Public finance and other commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	203,809
2020	179,913
2019	100,892
2018	39,236
2017	107,674
Prior	129,488
Revolving loans amortized cost basis	20,773
Revolving loans converted to term	0
Loans	781,785	647,939
Public finance and other commercial loans \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	203,809
2020	179,913
2019	100,892
2018	39,236
2017	107,674
Prior	129,488
Revolving loans amortized cost basis	20,773
Revolving loans converted to term	0
Loans	$ 781,785
Public finance and other commercial loans \| Commercial Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		647,939
Public finance and other commercial loans \| Commercial Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Public finance and other commercial loans \| Commercial Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Public finance and other commercial loans \| Commercial Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Public finance and other commercial loans \| Commercial Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Public finance and other commercial loans \| Consumer Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Public finance and other commercial loans \| Consumer Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 0

Loans and Allowance - Past Due Aging of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans	$ 9,041,576	$ 9,243,174
Loans > 90 Days or More Past Due And Accruing	157	746
Current
Financing Receivable, Past Due [Line Items]
Loans	9,002,702	9,170,399
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	12,170	19,638
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	3,541	11,187
90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	23,163	41,950
Commercial and industrial loans
Financing Receivable, Past Due [Line Items]
Loans	2,573,615	2,776,699
Loans > 90 Days or More Past Due And Accruing	1	594
Commercial and industrial loans \| Current
Financing Receivable, Past Due [Line Items]
Loans	2,554,111	2,761,473
Commercial and industrial loans \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	2,667	5,866
Commercial and industrial loans \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	507	6,571
Commercial and industrial loans \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	16,330	2,789
Agricultural land, production and other loans to farmers
Financing Receivable, Past Due [Line Items]
Loans	240,686	281,884
Loans > 90 Days or More Past Due And Accruing	0	0
Agricultural land, production and other loans to farmers \| Current
Financing Receivable, Past Due [Line Items]
Loans	240,660	280,615
Agricultural land, production and other loans to farmers \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	146
Agricultural land, production and other loans to farmers \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	226
Agricultural land, production and other loans to farmers \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	26	897
Construction
Financing Receivable, Past Due [Line Items]
Loans	521,889	484,723
Loans > 90 Days or More Past Due And Accruing	0	0
Construction \| Current
Financing Receivable, Past Due [Line Items]
Loans	521,889	484,706
Construction \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	17
Construction \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate, non-owner occupied
Financing Receivable, Past Due [Line Items]
Loans	2,150,387	2,220,949
Loans > 90 Days or More Past Due And Accruing	0	0
Commercial real estate, non-owner occupied \| Current
Financing Receivable, Past Due [Line Items]
Loans	2,142,055	2,184,681
Commercial real estate, non-owner occupied \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	4,698	2,525
Commercial real estate, non-owner occupied \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	424	2,109
Commercial real estate, non-owner occupied \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	3,210	31,634
Commercial real estate, owner occupied
Financing Receivable, Past Due [Line Items]
Loans	952,441	958,501
Loans > 90 Days or More Past Due And Accruing	0	0
Commercial real estate, owner occupied \| Current
Financing Receivable, Past Due [Line Items]
Loans	950,676	951,561
Commercial real estate, owner occupied \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	393	4,854
Commercial real estate, owner occupied \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,017	180
Commercial real estate, owner occupied \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	355	1,906
Residential
Financing Receivable, Past Due [Line Items]
Loans	1,154,373	1,234,741
Loans > 90 Days or More Past Due And Accruing	111	133
Residential \| Current
Financing Receivable, Past Due [Line Items]
Loans	1,147,965	1,226,779
Residential \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	2,982	3,269
Residential \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,195	1,429
Residential \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	2,231	3,264
Home equity
Financing Receivable, Past Due [Line Items]
Loans	531,307	508,259
Loans > 90 Days or More Past Due And Accruing	43	19
Home equity \| Current
Financing Receivable, Past Due [Line Items]
Loans	528,760	503,596
Home equity \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,197	2,644
Home equity \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	355	559
Home equity \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	995	1,460
Individuals' loans for household and other personal expenditures
Financing Receivable, Past Due [Line Items]
Loans	135,093	129,479
Loans > 90 Days or More Past Due And Accruing	2	0
Individuals' loans for household and other personal expenditures \| Current
Financing Receivable, Past Due [Line Items]
Loans	134,801	129,049
Individuals' loans for household and other personal expenditures \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	233	334
Individuals' loans for household and other personal expenditures \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	43	96
Individuals' loans for household and other personal expenditures \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	16	0
Public finance and other commercial loans
Financing Receivable, Past Due [Line Items]
Loans	781,785	647,939
Loans > 90 Days or More Past Due And Accruing	0	0
Public finance and other commercial loans \| Current
Financing Receivable, Past Due [Line Items]
Loans	781,785	647,939
Public finance and other commercial loans \| 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Public finance and other commercial loans \| 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Public finance and other commercial loans \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	$ 0	$ 0

Loans and Allowance - Summary of Non-Accrual Loans by Loan Class (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	$ 51,502	$ 61,471
Non-Accrual Loans with no Allowance for Credit Losses	5,786
Commercial and industrial loans
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	16,817	2,329
Non-Accrual Loans with no Allowance for Credit Losses	628
Agricultural land, production and other loans to farmers
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	119	1,012
Non-Accrual Loans with no Allowance for Credit Losses	0
Construction
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	15	123
Non-Accrual Loans with no Allowance for Credit Losses	0
Commercial real estate, non-owner occupied
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	26,176	46,316
Non-Accrual Loans with no Allowance for Credit Losses	3,816
Commercial real estate, owner occupied
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	1,002	3,040
Non-Accrual Loans with no Allowance for Credit Losses	545
Residential
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	5,556	6,517
Non-Accrual Loans with no Allowance for Credit Losses	797
Home equity
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	1,804	2,095
Non-Accrual Loans with no Allowance for Credit Losses	0
Individuals' loans for household and other personal expenditures
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	13	$ 39
Non-Accrual Loans with no Allowance for Credit Losses	$ 0

Loans and Allowance - Schedule of Modified Loans (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans \| loan	7	2	7	3
Recorded Balance \| $	$ 759	$ 423	$ 759	$ 691
Commercial and industrial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans \| loan	2	1	2	2
Recorded Balance \| $	$ 160	$ 317	$ 160	$ 585
Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans \| loan	5		5
Recorded Balance \| $	$ 599		$ 599
Commercial real estate, non-owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans \| loan		1		1
Recorded Balance \| $		$ 106		$ 106

Loans and Allowance - Changes in Allowance for Loan Losses by Loan Segment (Details) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2021

Sep. 30, 2020

Sep. 30, 2021

Sep. 30, 2020

Allowance for Loan and Lease Losses [Roll Forward]

$ 199,775

$ 121,119

$ 130,648

^[1]

$ 80,284

12,544

54,191

835

427

1,941

1,417

(638)

(7,364)

(6,672)

(9,166)

Impact of adopting ASC 326

199,972

^[1]

126,726

199,972

^[1]

126,726

Allowance for Loan and Lease Losses [Roll Forward]

Allowance for Loan and Lease Losses [Roll Forward]

74,055

Adjusted balance

Allowance for Loan and Lease Losses [Roll Forward]

204,703

Previously reported

Credit risk reclassifications

130,648

Allowance for Loan and Lease Losses [Roll Forward]

Allowance for Loan and Lease Losses [Roll Forward]

Commercial

63,681

44,678

47,115

32,902

3,496

7,299

666

19,240

204

197

544

746

(137)

(6,827)

(1,105)

(7,541)

Commercial | Impact of adopting ASC 326

67,244

45,347

67,244

45,347

Allowance for Loan and Lease Losses [Roll Forward]

Commercial | Adjusted balance

20,024

Allowance for Loan and Lease Losses [Roll Forward]

Commercial | Previously reported

67,139

Allowance for Loan and Lease Losses [Roll Forward]

Commercial | Credit risk reclassifications

47,115

Allowance for Loan and Lease Losses [Roll Forward]

Allowance for Loan and Lease Losses [Roll Forward]

Commercial Real Estate

72,701

46,918

40,786

28,778

(3,850)

2,990

(2,709)

21,129

370

567

271

(115)

(4,463)

(224)

Commercial Real Estate | Impact of adopting ASC 326

69,106

49,954

69,106

49,954

Allowance for Loan and Lease Losses [Roll Forward]

Commercial Real Estate | Adjusted balance

34,925

Allowance for Loan and Lease Losses [Roll Forward]

Commercial Real Estate | Previously reported

75,711

Allowance for Loan and Lease Losses [Roll Forward]

Commercial Real Estate | Credit risk reclassifications

51,070

Allowance for Loan and Lease Losses [Roll Forward]

Allowance for Loan and Lease Losses [Roll Forward]

(10,284)

Construction

17,077

10,284

567

(1,444)

(4)

(6)

Construction | Impact of adopting ASC 326

17,640

Allowance for Loan and Lease Losses [Roll Forward]

Construction | Adjusted balance

8,805

Allowance for Loan and Lease Losses [Roll Forward]

Construction | Previously reported

19,089

Allowance for Loan and Lease Losses [Roll Forward]

Construction | Credit risk reclassifications

Allowance for Loan and Lease Losses [Roll Forward]

Allowance for Loan and Lease Losses [Roll Forward]

10,284

Consumer

8,445

4,035

971

5,678

152

(92)

(487)

Consumer | Impact of adopting ASC 326

9,378

Allowance for Loan and Lease Losses [Roll Forward]

Consumer | Adjusted balance

Allowance for Loan and Lease Losses [Roll Forward]

Consumer | Previously reported

Allowance for Loan and Lease Losses [Roll Forward]

Consumer | Credit risk reclassifications

9,648

Allowance for Loan and Lease Losses [Roll Forward]

Allowance for Loan and Lease Losses [Roll Forward]

(9,648)

Residential

21,078

14,569

1,284

8,144

130

248

(445)

(914)

Residential | Impact of adopting ASC 326

$ 22,047

Allowance for Loan and Lease Losses [Roll Forward]

Residential | Adjusted balance

Allowance for Loan and Lease Losses [Roll Forward]

Residential | Previously reported

Allowance for Loan and Lease Losses [Roll Forward]

Residential | Credit risk reclassifications

22,815

Allowance for Loan and Lease Losses [Roll Forward]

Allowance for Loan and Lease Losses [Roll Forward]

(22,815)

Consumer & Residential

46,316

32,463

(213)

3,487

261

829

(382)

(1,098)

Consumer & Residential | Impact of adopting ASC 326

$ 45,982

45,982

Allowance for Loan and Lease Losses [Roll Forward]

Consumer & Residential | Adjusted balance

10,301

Allowance for Loan and Lease Losses [Roll Forward]

Consumer & Residential | Previously reported

42,764

Allowance for Loan and Lease Losses [Roll Forward]

Consumer & Residential | Credit risk reclassifications

Allowance for Loan and Lease Losses [Roll Forward]

$ 32,463

[1]	Beginning January 1, 2021, the amount is based on the current expected credit loss methodology. Prior to January 1, 2021, the amount is based on the incurred loss methodology. See additional details in NOTE 1. GENERAL of these Notes to Consolidated Condensed Financial Statement.

Loans and Allowance - Allowance for Credit Losses and Loan Portfolio by Loan Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Allowance Balances:
Individually evaluated for impairment		$ 12,901
Collectively evaluated for impairment		117,747
Total Allowance for Loan Losses		130,648
Loan Balances:
Individually evaluated for impairment	$ 49,643	56,156
Collectively evaluated for impairment		9,180,857
Financing Receivable, Evaluated for Impairment		9,243,174
Loans acquired with deteriorated credit quality
Loan Balances:
Financing Receivable, Evaluated for Impairment		6,161
Commercial
Allowance Balances:
Individually evaluated for impairment		223
Collectively evaluated for impairment		46,892
Total Allowance for Loan Losses		47,115
Loan Balances:
Individually evaluated for impairment		1,258
Collectively evaluated for impairment		3,505,863
Financing Receivable, Evaluated for Impairment		3,507,698
Commercial \| Loans acquired with deteriorated credit quality
Loan Balances:
Financing Receivable, Evaluated for Impairment		577
Commercial Real Estate
Allowance Balances:
Individually evaluated for impairment		12,246
Collectively evaluated for impairment		38,824
Total Allowance for Loan Losses		51,070
Loan Balances:
Individually evaluated for impairment		51,605
Collectively evaluated for impairment		3,805,808
Financing Receivable, Evaluated for Impairment		3,862,997
Commercial Real Estate \| Loans acquired with deteriorated credit quality
Loan Balances:
Financing Receivable, Evaluated for Impairment		5,584
Consumer
Allowance Balances:
Individually evaluated for impairment		0
Collectively evaluated for impairment		9,648
Total Allowance for Loan Losses		9,648
Loan Balances:
Individually evaluated for impairment		2
Collectively evaluated for impairment		129,477
Financing Receivable, Evaluated for Impairment		129,479
Residential
Allowance Balances:
Individually evaluated for impairment		432
Collectively evaluated for impairment		22,383
Total Allowance for Loan Losses		22,815
Loan Balances:
Individually evaluated for impairment	2,927	3,291
Collectively evaluated for impairment		1,739,709
Financing Receivable, Evaluated for Impairment		1,743,000
Residential \| Loans acquired with deteriorated credit quality
Loan Balances:
Financing Receivable, Evaluated for Impairment		$ 0
Home equity
Loan Balances:
Individually evaluated for impairment	$ 402

Loans and Allowance - Schedule of Composition of Impaired Loans by Loan Class (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2020
Unpaid Principal Balance
Impaired loans with no related allowance			$ 9,101
Impaired loans with related allowance			49,513
Total Impaired Loans			58,614
Recorded Investment
Impaired loans with no related allowance			7,813
Impaired loans with related allowance			48,343
Total Impaired Loans			56,156
Related Allowance			12,901
Average Recorded Investment
Impaired loans with no related allowance	$ 19,498	$ 20,346
Impaired loans with related allowance	37,811	38,000
Total Impaired Loans	57,309	58,346
Interest Income Recognized
Impaired loans with no related allowance	38	115
Impaired loans with related allowance	22	64
Total Impaired Loans	60	179
Commercial and industrial loans
Unpaid Principal Balance
Impaired loans with no related allowance			1,059
Impaired loans with related allowance			268
Recorded Investment
Impaired loans with no related allowance			991
Impaired loans with related allowance			268
Related Allowance			223
Average Recorded Investment
Impaired loans with no related allowance	8,625	9,225
Impaired loans with related allowance	1,018	1,018
Interest Income Recognized
Impaired loans with no related allowance	0	0
Impaired loans with related allowance	0	0
Agricultural land, production and other loans to farmers
Unpaid Principal Balance
Impaired loans with related allowance			640
Recorded Investment
Impaired loans with related allowance			562
Related Allowance			3
Commercial real estate, non-owner occupied
Unpaid Principal Balance
Impaired loans with no related allowance			4,958
Impaired loans with related allowance			44,016
Recorded Investment
Impaired loans with no related allowance			4,694
Impaired loans with related allowance			43,715
Related Allowance			11,686
Commercial real estate, owner occupied
Unpaid Principal Balance
Impaired loans with no related allowance			2,125
Impaired loans with related allowance			2,061
Recorded Investment
Impaired loans with no related allowance			1,310
Impaired loans with related allowance			1,323
Related Allowance			557
Commercial and farmland
Average Recorded Investment
Impaired loans with no related allowance	10,812	11,059
Impaired loans with related allowance	33,390	33,543
Interest Income Recognized
Impaired loans with no related allowance	37	113
Impaired loans with related allowance	0	0
Residential
Unpaid Principal Balance
Impaired loans with no related allowance			957
Impaired loans with related allowance			2,041
Recorded Investment
Impaired loans with no related allowance			816
Impaired loans with related allowance			2,014
Related Allowance			352
Average Recorded Investment
Impaired loans with no related allowance	58	59
Impaired loans with related allowance	2,921	2,951
Interest Income Recognized
Impaired loans with no related allowance	1	2
Impaired loans with related allowance	18	53
Individuals' loans for household and other personal expenditures
Unpaid Principal Balance
Impaired loans with no related allowance			2
Recorded Investment
Impaired loans with no related allowance			2
Average Recorded Investment
Impaired loans with no related allowance	3	3
Interest Income Recognized
Impaired loans with no related allowance	0	0
Home equity
Unpaid Principal Balance
Impaired loans with related allowance			487
Recorded Investment
Impaired loans with related allowance			461
Related Allowance			$ 80
Average Recorded Investment
Impaired loans with related allowance	482	488
Interest Income Recognized
Impaired loans with related allowance	$ 4	$ 11

Loans and Allowance - Amounts of Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Loan commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Amounts of commitments	$ 3,938,075	$ 3,443,514
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Amounts of commitments	$ 33,986	$ 29,555

Loans and Allowance - Allowance for Credit Losses, Off-balance Sheet (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2021 USD ($)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balances, June 30, 2021	$ 20,500
Provision for credit losses	0
Balances, September 30, 2021	$ 20,500

Goodwill - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Apr. 01, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Goodwill [Line Items]
Goodwill	$ 545,385		$ 543,918	$ 543,918	$ 543,918
Hoosier
Goodwill [Line Items]
Goodwill		$ 1,467

Goodwill - Schedule of Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Goodwill [Roll Forward]
Balance, January 1	$ 543,918	$ 543,918
Goodwill acquired	1,467	0
Balance, September 30	$ 545,385	$ 543,918

Other Intangibles - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Apr. 01, 2021
Indefinite-lived Intangible Assets [Line Items]
Useful life of core deposit intangibles and other intangibles			10 years
Intangible asset amortization	$ 1,463	$ 1,486	$ 4,284	$ 4,511
Hoosier
Indefinite-lived Intangible Assets [Line Items]
Customer relationship intangible					$ 2,247
Hoosier \| Customer Relationships
Indefinite-lived Intangible Assets [Line Items]
Customer relationship intangible					$ 2,247

Other Intangibles- Schedule of Core Deposit Intangibles (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amount	$ 102,396	$ 102,396
Other intangibles acquired	2,247	0
Accumulated amortization	(77,705)	(73,421)
Total core deposit and other intangibles	$ 26,938	$ 28,975

Other Intangibles - Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Amortization Expense
2021	$ 1,463
2022	5,402
2023	5,145
2024	4,510
2025	3,754
After 2025	6,664
Total core deposit and other intangibles	$ 26,938	$ 28,975

Derivative Financial Instruments - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($) interest_rate_swap	Dec. 31, 2020 USD ($) interest_rate_swap
Derivative [Line Items]
Termination value of derivatives in a net liability position	$ 41.7
Derivative collateral posted	58.8
Designated as Hedges
Derivative [Line Items]
Estimated amount to be transferred from accumulated other comprehensive income to earnings	1.0
Non-designated Hedges
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 1,000.0	$ 985.0
Cash Flow Hedging \| Interest rate swap \| Designated as Hedges
Derivative [Line Items]
Number of interest rate derivatives held \| interest_rate_swap	4	4
Notional amount of interest rate derivatives	$ 60.0	$ 60.0
Cash Flow Hedging \| Interest rate swap \| Trust Preferred Debt \| Designated as Hedges
Derivative [Line Items]
Notional amount of interest rate derivatives	26.0
Cash Flow Hedging \| Interest rate swap \| Federal Home Loan Bank advances \| Designated as Hedges
Derivative [Line Items]
Notional amount of interest rate derivatives	10.0
Cash Flow Hedging \| Interest rate swap \| Brokered Deposit \| Designated as Hedges
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 24.0

Derivative Financial Instruments - Fair Value of Derivative Financial Instruments and Their Classification on Balance Sheet (Details) - Interest rate contracts - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Derivatives designated as hedging instruments \| Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 0	$ 0
Derivatives designated as hedging instruments \| Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	1,217	2,018
Derivatives not designated as hedging instruments \| Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	47,630	74,335
Derivatives not designated as hedging instruments \| Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 47,630	$ 74,335

Derivative Financial Instruments - Effect of Derivative Financial Instruments on Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	$ (20)	$ 8	$ 22	$ (1,451)
Derivatives designated as hedging instruments \| Cash Flow Hedging \| Interest Rate Products
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	$ (20)	$ 8	$ 22	$ (1,451)

Derivative Financial Instruments - Effect of Derivative Financial Instruments on Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative [Line Items]
Amount of Gain (Loss) Reclassed from Other Comprehensive Income into Income (Effective Portion)	$ (266)	$ (294)	$ (779)	$ (651)
Interest rate contracts \| Derivatives designated as hedging instruments \| Interest Expense
Derivative [Line Items]
Amount of Gain (Loss) Reclassed from Other Comprehensive Income into Income (Effective Portion)	$ (266)	$ (294)	$ (779)	$ (651)

Disclosures About Fair Value of Assets and Liabilities - Fair Value Measurements of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	$ 2,374,578	$ 1,919,119
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	2,368,978	1,916,640
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	5,600	2,479
Recurring \| Interest rate swap liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap liability	48,847	76,353
Recurring \| U.S. Treasury
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	1,000
Recurring \| U.S. Government-sponsored agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	11,557	2,430
Recurring \| State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	1,534,555	1,257,885
Recurring \| U.S. Government-sponsored mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	823,137	654,669
Recurring \| Corporate obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	4,329	4,135
Recurring \| Interest rate swap asset
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap asset	47,630	74,335
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Interest rate swap liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap liability	0	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. Treasury
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. Government-sponsored agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. Government-sponsored mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Corporate obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Interest rate swap asset
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap asset	0	0
Recurring \| Significant Other Observable Inputs (Level 2) \| Interest rate swap liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap liability	48,847	76,353
Recurring \| Significant Other Observable Inputs (Level 2) \| U.S. Treasury
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	1,000
Recurring \| Significant Other Observable Inputs (Level 2) \| U.S. Government-sponsored agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	11,557	2,430
Recurring \| Significant Other Observable Inputs (Level 2) \| State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	1,528,990	1,255,441
Recurring \| Significant Other Observable Inputs (Level 2) \| U.S. Government-sponsored mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	823,133	654,665
Recurring \| Significant Other Observable Inputs (Level 2) \| Corporate obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	4,298	4,104
Recurring \| Significant Other Observable Inputs (Level 2) \| Interest rate swap asset
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap asset	47,630	74,335
Recurring \| Significant Unobservable Inputs (Level 3) \| Interest rate swap liability
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap liability	0	0
Recurring \| Significant Unobservable Inputs (Level 3) \| U.S. Treasury
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0
Recurring \| Significant Unobservable Inputs (Level 3) \| U.S. Government-sponsored agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Recurring \| Significant Unobservable Inputs (Level 3) \| State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	5,565	2,444
Recurring \| Significant Unobservable Inputs (Level 3) \| U.S. Government-sponsored mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	4	4
Recurring \| Significant Unobservable Inputs (Level 3) \| Corporate obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	31	31
Recurring \| Significant Unobservable Inputs (Level 3) \| Interest rate swap asset
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap asset	$ 0	$ 0

Disclosures About Fair Value of Assets and Liabilities - Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements using Significant Unobservable Level 3 Inputs (Details) - Recurring - Available for Sale Securities - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Available for Sale Securities
Balance at beginning of the period	$ 5,795	$ 2,500	$ 2,479	$ 2,892
Included in other comprehensive income	(21)	75	333	25
Purchases, issuances and settlements	0	0	3,241	0
Principal payments	(174)	(88)	(453)	(430)
Ending balance	$ 5,600	$ 2,487	$ 5,600	$ 2,487

Disclosures About Fair Value of Assets and Liabilities - Valuation Methodologies Used for Instruments Measured at Fair Value on Non-Recurring Basis (Details) - Nonrecurring - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Collateral dependent loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	$ 31,408	$ 37,250
Collateral dependent loans \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	0	0
Collateral dependent loans \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	0	0
Collateral dependent loans \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	31,408	37,250
Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	96	544
Other real estate owned \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	0	0
Other real estate owned \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	0	0
Other real estate owned \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset fair value	$ 96	$ 544

Disclosures About Fair Value of Assets and Liabilities - Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements Other Than Goodwill (Details) - Significant Unobservable Inputs (Level 3) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2021	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
State and municipal securities \| Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value		$ 5,565	$ 2,444
State and municipal securities \| Discounted cash flow \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Maturity/Call date	1 month	1 month
US Muni BQ curve	BBB-	BBB-
State and municipal securities \| Discounted cash flow \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Maturity/Call date	15 years	15 years
US Muni BQ curve	A-	A-
State and municipal securities \| Discounted cash flow \| Discount rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate		0.0075	0.0150
State and municipal securities \| Discounted cash flow \| Discount rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate		0.04	0.04
State and municipal securities \| Discounted cash flow \| Weighted-average coupon \| Weighted-average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate		0.04	0.04
Corporate obligations and U.S. Government-sponsored mortgage-backed securities \| Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value		$ 35	$ 35
Corporate obligations and U.S. Government-sponsored mortgage-backed securities \| Discounted cash flow \| Weighted-average coupon \| Weighted-average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate		0	0
Corporate obligations and U.S. Government-sponsored mortgage-backed securities \| Discounted cash flow \| Risk free rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Risk free rate	3 month LIBOR	3 month LIBOR
Corporate obligations and U.S. Government-sponsored mortgage-backed securities \| Discounted cash flow \| plus premium for illiquidity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate		0.02	0.02
Collateral dependent loans \| Collateral based measurements
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value		$ 31,408	$ 37,250
Collateral dependent loans \| Collateral based measurements \| Discount to reflect current market conditions and ultimate collectability \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability		0	0
Collateral dependent loans \| Collateral based measurements \| Discount to reflect current market conditions and ultimate collectability \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability		0.10	0.10
Collateral dependent loans \| Collateral based measurements \| Discount to reflect current market conditions and ultimate collectability \| Weighted-average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability		0.05	0.06
Other real estate owned \| Appraisals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value		$ 96	$ 544
Other real estate owned \| Appraisals \| Discount to reflect current market conditions \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned		0	0
Other real estate owned \| Appraisals \| Discount to reflect current market conditions \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned		0.72	0.30
Other real estate owned \| Appraisals \| Discount to reflect current market conditions \| Weighted-average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned		0.44	0.26

Disclosures About Fair Value of Assets and Liabilities - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets:
Investment securities available for sale	$ 2,374,578	$ 1,919,119
Investment securities held to maturity	2,086,555	1,280,293
Loans held for sale	5,990	3,966
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	169,261	192,896
Interest-bearing deposits	369,447	392,305
Investment securities available for sale	0	0
Investment securities held to maturity	0	0
Loans held for sale	0	0
Loans, net	0	0
Federal Home Loan Bank stock	0	0
Interest rate swap asset	0	0
Interest receivable	0	0
Liabilities:
Deposits	11,618,882	10,482,865
Borrowings:
Securities sold under repurchase agreements	0	0
Federal Home Loan Bank advances	0	0
Subordinated debentures and other borrowings	0	0
Interest rate swap liability	0	0
Interest payable	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Cash and cash equivalents	0	0
Interest-bearing deposits	0	0
Investment securities available for sale	2,368,978	1,916,640
Investment securities held to maturity	2,071,246	1,260,815
Loans held for sale	5,990	3,966
Loans, net	0	0
Federal Home Loan Bank stock	28,736	28,736
Interest rate swap asset	47,630	74,335
Interest receivable	53,079	53,948
Liabilities:
Deposits	727,961	878,257
Borrowings:
Securities sold under repurchase agreements	183,584	177,097
Federal Home Loan Bank advances	339,704	399,991
Subordinated debentures and other borrowings	107,595	108,439
Interest rate swap liability	48,847	76,353
Interest payable	3,736	3,287
Significant Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	0	0
Interest-bearing deposits	0	0
Investment securities available for sale	5,600	2,479
Investment securities held to maturity	15,309	19,478
Loans held for sale	0	0
Loans, net	8,900,412	9,191,628
Federal Home Loan Bank stock	0	0
Interest rate swap asset	0	0
Interest receivable	0	0
Liabilities:
Deposits	0	0
Borrowings:
Securities sold under repurchase agreements	0	0
Federal Home Loan Bank advances	0	0
Subordinated debentures and other borrowings	0	0
Interest rate swap liability	0	0
Interest payable	0	0
Carrying Amount
Assets:
Cash and cash equivalents	169,261	192,896
Interest-bearing deposits	369,447	392,305
Investment securities available for sale	2,374,578	1,919,119
Investment securities held to maturity	2,070,938	1,227,668
Loans held for sale	5,990	3,966
Loans, net	8,841,604	9,112,526
Federal Home Loan Bank stock	28,736	28,736
Interest rate swap asset	47,630	74,335
Interest receivable	53,079	53,948
Liabilities:
Deposits	12,348,689	11,361,610
Borrowings:
Securities sold under repurchase agreements	183,589	177,102
Federal Home Loan Bank advances	334,149	389,430
Subordinated debentures and other borrowings	118,558	118,380
Interest rate swap liability	48,847	76,353
Interest payable	$ 3,736	$ 3,287

Transfers Accounted for as Secured Borrowings (Details) - U.S. Government-sponsored mortgage-backed securities - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	$ 183,589	$ 177,102
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	183,589	175,449
Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	0	0
30-90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	0	1,653
Greater Than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Collateral pledged for all repurchase agreements accounted for as secured borrowings	$ 0	$ 0

Accumulated Other Comprehensive Income (Loss) - Summary of Changes (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss)
Beginning balance	$ 1,875,645	$ 1,786,437
Other comprehensive income (loss) before reclassifications	(31,362)	44,583
Amounts reclassified from accumulated other comprehensive income	(3,585)	(6,989)
Total other comprehensive income (loss), net of tax	(34,947)	37,594
Ending balance	1,868,090	1,833,656
Total
Accumulated Other Comprehensive Income (Loss)
Beginning balance	74,836	27,874
Ending balance	39,889	65,468
Unrealized Gains (Losses) on Securities Available for Sale
Accumulated Other Comprehensive Income (Loss)
Beginning balance	87,988	38,872
Other comprehensive income (loss) before reclassifications	(31,379)	45,729
Amounts reclassified from accumulated other comprehensive income	(4,200)	(7,503)
Total other comprehensive income (loss), net of tax	(35,579)	38,226
Ending balance	52,409	77,098
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(1,594)	(1,141)
Other comprehensive income (loss) before reclassifications	17	(1,146)
Amounts reclassified from accumulated other comprehensive income	615	514
Total other comprehensive income (loss), net of tax	632	(632)
Ending balance	(962)	(1,773)
Unrealized Gains (Losses) on Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(11,558)	(9,857)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income	0	0
Total other comprehensive income (loss), net of tax	0	0
Ending balance	$ (11,558)	$ (9,857)

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Accumulated Other Comprehensive Income (Loss) - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Net realized gains on sales of available for sale securities	$ 1,756	$ 1,817	$ 5,316	$ 9,497
Interest expense - subordinated debentures and term loans	1,660	1,691	4,976	5,275
Income tax expense	(9,062)	(5,621)	(28,308)	(13,734)
Total reclassifications for the period, net of tax	52,770	36,210	157,798	103,465
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the Period
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	1,177	1,203	3,585	6,989
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the Period \| Unrealized gains (losses) on available for sale securities
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Net realized gains on sales of available for sale securities	1,756	1,817	5,316	9,497
Income tax expense	(369)	(382)	(1,116)	(1,994)
Total reclassifications for the period, net of tax	1,387	1,435	4,200	7,503
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the Period \| Unrealized gains (losses) on cash flow hedges
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	56	62	164	137
Total reclassifications for the period, net of tax	(210)	(232)	(615)	(514)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the Period \| Unrealized gains (losses) on cash flow hedges \| Interest rate contracts
Reclassification Adjustments out of Accumulated Other Comprehensive Income [Line Items]
Interest expense - subordinated debentures and term loans	$ (266)	$ (294)	$ (779)	$ (651)

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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