Columbia Banking System (COLB) 10-Q 4 Aug 22 2022 Q2 Quarterly report Financial data

Document

Document - shares	6 Months Ended
	Jun. 30, 2022	Jul. 31, 2022
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	000-20288
Entity Registrant Name	COLUMBIA BANKING SYSTEM, INC.
Entity Incorporation, State or Country Code	WA
Entity Tax Identification Number	91-1422237
Entity Address, Address Line One	1301 A Street
Entity Address, City or Town	Tacoma
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98402-2156
City Area Code	253
Local Phone Number	305-1900
Title of 12(b) Security	Common Stock, No Par Value
Trading Symbol	COLB
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		78,649,458
Entity Central Index Key	0000887343
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
ASSETS
Cash and due from banks	$ 239,868	$ 153,414
Interest-earning deposits with banks	174,328	671,300
Total cash and cash equivalents	414,196	824,714
Debt securities available for sale at fair value	5,122,568	5,910,999
Debt Securities, Held-to-Maturity, Amortized Cost	2,149,255	2,148,327
Equity Securities	13,425	13,425
FHLB stock at cost	10,280	10,280
Loans held for sale	3,718	9,774
Loans, net of unearned income	11,322,387	10,641,937
Less: Allowance for credit losses	149,935	155,578
Loans, net	11,172,452	10,486,359
Interest receivable	57,155	56,019
Premises and equipment, net	168,586	172,144
OREO	33	381
Goodwill	823,172	823,172
Other intangible assets, net	30,140	34,647
Other assets	599,410	455,092
Total assets	20,564,390	20,945,333
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing	8,741,488	8,856,714
Interest-bearing	9,215,438	9,153,401
Total deposits	17,956,926	18,010,115
FHLB advances	7,331	7,359
Securities sold under agreements to repurchase	70,349	86,013
Subordinated debentures	10,000	10,000
Junior subordinated Debentures	10,310	10,310
Other liabilities	266,256	232,794
Total liabilities	$ 18,321,172	$ 18,356,591
Shareholders' equity:
Preferred Stock, Authorized shares	2,000	2,000
Common Stock Authorized shares	115,000	115,000
Common Stock Issued Shares	80,805	80,695
Common Stock Issued value	$ 1,935,180	$ 1,930,187
Common Stock, Shares, Outstanding	78,621	78,511
Retained earnings	$ 763,487	$ 694,227
Accumulated other comprehensive income (loss)	$ (384,615)	$ 35,162
Treasury Stock, Shares	2,184	2,184
Treasury Stock, Value	$ (70,834)	$ (70,834)
Total shareholders’ equity	2,243,218	2,588,742
Total liabilities and shareholders’ equity	$ 20,564,390	$ 20,945,333

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ / shares in Thousands, $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Amortized Cost	$ 5,647,523	$ 5,898,041
Debt Securities, Held-to-maturity, Fair Value	$ 1,912,526	$ 2,122,606
Preferred Stock, No Par Value	$ 0	$ 0
Common Stock, No Par Value	$ 0	$ 0

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest Income
Loans	$ 111,049	$ 99,712	$ 218,152	$ 200,027
Taxable securities	34,622	24,750	71,784	47,566
Tax-exempt securities	3,755	2,826	7,480	5,585
Deposits in banks	887	159	1,182	311
Total interest income	150,313	127,447	298,598	253,489
Interest Expense
Deposits	2,464	1,426	4,260	2,911
FHLB advances and FRB borrowings	73	72	144	144
Subordinated debentures	172	468	316	936
Other borrowings	153	19	227	42
Total interest expense	2,862	1,985	4,947	4,033
Net Interest Income	147,451	125,462	293,651	249,456
Provision (recapture) for credit losses	2,100	(5,500)	(5,700)	(6,300)
Net interest income after provision (recapture) for credit losses	145,351	130,962	299,351	255,756
Noninterest Income
Deposit account and treasury management fees	8,212	6,701	15,325	13,059
Card revenue	5,031	4,773	9,998	8,506
Financial services and trust revenue	4,192	4,245	8,824	7,626
Loan revenue	3,881	4,514	7,074	11,883
Bank owned life insurance	2,024	1,635	3,812	3,195
Other securities gains	0	314	0	314
Other	1,666	548	4,153	1,313
Total noninterest income	25,006	22,730	49,186	45,896
Noninterest Expense
Compensation and employee benefits	57,386	53,450	120,465	105,186
Occupancy	9,632	9,038	20,641	18,044
Data processing and software	9,185	7,402	19,509	15,853
Legal and professional fees	5,182	3,264	11,717	6,079
Amortization of intangibles	2,219	1,852	4,507	3,776
B&O taxes	1,584	1,490	3,173	2,749
Advertising and promotion	1,208	588	1,934	1,348
Regulatory premiums	1,461	1,112	2,997	2,217
Net cost of operation of OREO	116	111	126	48
Other	7,406	5,809	15,363	12,375
Total noninterest expense	95,379	84,116	200,432	167,675
Income before income taxes	74,978	69,576	148,105	133,977
Income tax provision	16,170	14,537	31,775	27,085
Net Income	$ 58,808	$ 55,039	$ 116,330	$ 106,892
Earnings per common share
Basic	$ 0.75	$ 0.77	$ 1.49	$ 1.50
Diluted	$ 0.75	$ 0.77	$ 1.49	$ 1.50
Weighted average number of common shares outstanding	78,049	70,987	77,989	70,924
Weighted average number of diluted common shares outstanding	78,114	71,164	78,099	71,079

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Income	$ 58,808	$ 55,039	$ 116,330	$ 106,892
Unrealized gain from securities
Net unrealized holding gain (loss) from available for sale debt securities arising during the period, net of tax	(152,860)	21,850	(412,848)	(80,755)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	0	241	0	241
Amortization of net unrealized gain for the reclassification of available for sale securities to held to maturity, after Tax	2,080	345	3,156	345
Net unrealized gain (loss) from securities, net of reclassification adjustment	(154,940)	21,264	(416,004)	(81,341)
Pension plan liability adjustment:
Amortization of unrecognized net actuarial loss included in net periodic pension cost, net of tax	100	115	201	230
Pension plan liability adjustment, net	100	115	201	230
Unrealized gain from cash flow hedging instruments
Reclassification adjustment for net gain in cash flow hedging instruments included in income, net of tax	1,998	1,998	3,974	3,975
Net unrealized gain (loss) from cash flow hedging instruments, net of reclassification adjustment	(1,998)	(1,998)	(3,974)	(3,975)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	(156,838)	19,381	(419,777)	(85,086)
Total comprehensive income	$ (98,030)	$ 74,420	$ (303,447)	$ 21,806

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ 46,306	$ (6,619)	$ 125,065	$ 24,463
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	0	73	0	73
OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), Tax	630	105	956	105
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	(31)	(34)	(61)	(69)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	$ 605	$ 604	$ 1,204	$ 1,203

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]
Shares, Outstanding		71,598
Balance, value at Dec. 31, 2020	$ 2,347,607	$ 1,660,998	$ 575,248	$ 182,195	$ (70,834)
Net income	106,892		106,892
Other comprehensive income (loss)	(85,086)			(85,086)
Issuance of common stock - employee stock purchase plan, shares		41
Issuance of common stock - employee stock purchase plan, value	$ 1,098	$ 1,098
Activity in Deferred Compensation Plan, shares	0
Activity in Deferred Compensation Plan, value	$ (8)
Issuance of common stock - RSAs and RSUs, net of canceled awards, shares		192
Issuance of common stock - RSAs and RSUs, net of canceled awards, value	6,936	$ 6,936
Purchase and retirement of common stock, shares		(89)
Purchase and retirement of common stock, value	(4,071)	$ (4,071)
Cash dividends declared on common stock	(40,122)		(40,122)
Balance, value at Jun. 30, 2021	2,333,246	$ 1,664,953	642,018	97,109	(70,834)
Shares, Outstanding		71,739
Balance, value at Mar. 31, 2021	2,275,063	$ 1,661,129	607,040	77,728	(70,834)
Net income	55,039		55,039
Other comprehensive income (loss)	$ 19,381			19,381
Activity in Deferred Compensation Plan, shares	0
Activity in Deferred Compensation Plan, value	$ (8)	$ (8)
Issuance of common stock - RSAs and RSUs, net of canceled awards, shares		4
Issuance of common stock - RSAs and RSUs, net of canceled awards, value	3,908	$ 3,908
Purchase and retirement of common stock, shares		(1)
Purchase and retirement of common stock, value	(76)	$ (76)
Cash dividends declared on common stock	(20,061)		(20,061)
Balance, value at Jun. 30, 2021	2,333,246	$ 1,664,953	642,018	97,109	(70,834)
Shares, Outstanding		71,742
Shares, Outstanding		78,511
Balance, value at Dec. 31, 2021	2,588,742	$ 1,930,187	694,227	35,162	(70,834)
Net income	116,330		116,330
Other comprehensive income (loss)	(419,777)			(419,777)
Issuance of common stock - employee stock purchase plan, shares		31
Issuance of common stock - employee stock purchase plan, value	1,017	$ 1,017
Activity in Deferred Compensation Plan, shares		0
Activity in Deferred Compensation Plan, value	3	$ 3
Issuance of common stock - RSAs and RSUs, net of canceled awards, shares		187
Issuance of common stock - RSAs and RSUs, net of canceled awards, value	7,910	$ 7,910
Purchase and retirement of common stock, shares		(108)
Purchase and retirement of common stock, value	(3,937)	$ (3,937)
Cash dividends declared on common stock	(47,070)		(47,070)
Balance, value at Jun. 30, 2022	2,243,218	$ 1,935,180	763,487	(384,615)	(70,834)
Shares, Outstanding		78,644
Balance, value at Mar. 31, 2022	2,360,779	$ 1,931,076	728,314	(227,777)	(70,834)
Net income	58,808		58,808
Other comprehensive income (loss)	(156,838)			(156,838)
Activity in Deferred Compensation Plan, shares		0
Activity in Deferred Compensation Plan, value	2	$ 2
Issuance of common stock - RSAs and RSUs, net of canceled awards, shares		(23)
Issuance of common stock - RSAs and RSUs, net of canceled awards, value	4,115	$ 4,115
Purchase and retirement of common stock, shares		0
Purchase and retirement of common stock, value	(13)	$ (13)
Cash dividends declared on common stock	(23,635)		(23,635)
Balance, value at Jun. 30, 2022	$ 2,243,218	$ 1,935,180	$ 763,487	$ (384,615)	$ (70,834)
Shares, Outstanding		78,621

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical and Footnote) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Cash dividends declared on common stock, per share	$ 0.30	$ 0.28	$ 0.60	$ 0.56

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows From Operating Activities
Net income	$ 116,330	$ 106,892
Adjustments to reconcile net income to net cash provided by operating activities
Recapture for credit losses	(5,700)	(6,300)
Stock-based compensation expense	7,910	6,936
Depreciation, amortization and accretion	22,599	7,056
Investment securities gain, net	0	314
Net realized gain on sale of premises and equipment and loans held for investment	1,339	279
Net realized loss on sale and valuation adjustments of OREO	(148)	(40)
Gain on bank owned life insurance death benefit	610	209
Originations of loans held for sale	90,137	195,632
Proceeds from sales of loans held for sale	96,022	208,789
Change in fair value of loans held for sale	171	145
Net change in:
Interest receivable	(1,136)	2,484
Interest payable	18	(49)
Other assets	(7,201)	12,583
Other liabilities	24,488	(14,700)
Net cash provided by operating activities	161,563	127,442
Cash Flows From Investing Activities
Loans originated, net of principal collected	(700,946)	(177,399)
Investment in low income housing tax credit partnerships	(271)	0
Purchases of Debt Securities, Available-for-sale	183,803	1,527,512
Purchases of debt securities held to maturity	(97,658)	(22,915)
Purchases of loans held for investment	0	74,383
Purchases of premises and equipment	(3,639)	(3,087)
Proceeds from Sale of Debt Securities, Available-for-sale	0	26,914
Proceeds from principal repayments and maturities of debt securities available for sale	418,967	385,408
Proceeds from repayments and maturities of securities held to maturity	86,328	8,711
Proceeds from sales of premises and equipment	27,574	4,296
Proceeds from sales of other real estate and other personal property owned	200	132
Proceeds from bank owned life insurance death benefit	0	671
Net cash used in investing activities	(453,248)	(1,379,164)
Cash Flows From Financing Activities
Net increase (decrease) in deposits	(52,821)	1,475,570
Net decrease in sweep repurchase agreements	(15,664)	(2,865)
Proceeds from FHLB advances	20	10
Proceeds from FRB borrowings	20	0
Proceeds from employee stock purchase plan	1,017	1,098
Repayment of FHLB advances	(20)	(10)
Repayment of FRB borrowings	(20)	0
Payments of Common Stock Dividends	47,428	40,244
Payments for purchase and retirement of common stock	3,937	4,071
Net cash provided by (used in) financing activities	(118,833)	1,429,488
Increase (decrease) in cash and cash equivalents	(410,518)	177,766
Cash and cash equivalents at beginning of period	824,714	653,766
Cash and cash equivalents at end of period	414,196	831,532
Supplemental Information:
Cash paid for interest	4,930	4,082
Income Taxes Paid, Net	15,393	28,474
Non-cash investing and financing activities
Securities transfer from AFS to HTM, fair value	0	2,012,123
Change in dividends payable included in other liabilities	$ (358)	$ (122)

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2022
Basis of Presentation And Significant Accounting Policies
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies Basis of Presentation The interim unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with instructions to Form 10-Q and Article 10 of Regulation S-X. The Consolidated Financial Statements include the accounts of Columbia Banking System, Inc. (“we”, “our”, “Columbia” or the “Company”) and its subsidiaries, including its wholly owned banking subsidiary Columbia State Bank (“Columbia Bank” or the “Bank”) and Columbia Trust Company (“Columbia Trust”). All intercompany transactions and accounts have been eliminated in consolidation. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair statement of the results for the interim periods presented have been included. The results of operations for the six months ended June 30, 2022 are not necessarily indicative of results to be anticipated for the year ending December 31, 2022. The accompanying interim unaudited Consolidated Financial Statements should be read in conjunction with the financial statements and related notes contained in the Company’s 2021 Annual Report on Form 10-K. Significant Accounting Policies The significant accounting policies used in preparation of our Consolidated Financial Statements are disclosed in our 2021 Annual Report on Form 10-K. There have not been any changes in our significant accounting policies compared to those contained in our 2021 Annual Report on Form 10-K disclosure for the year ended December 31, 2021.

Accounting Pronouncements Recen

Accounting Pronouncements Recently Adopted or Issued	6 Months Ended
	Jun. 30, 2022
Accounting Standards Update and Change in Accounting Principle [Abstract]
New Accounting Pronouncements Recently Adopted or Issued	Accounting Pronouncements Recently Adopted or Issued Accounting Standards Adopted in 2022 There are no recently issued accounting standards that are applicable to the Company that were adopted in 2022. Recently Issued Accounting Standards, Not Yet Adopted In June 2022, the FASB issued ASU 2022-03, Fair Value Measurement (Topic 820) - Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions . The amendments in this ASU clarify that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and is not considered in measuring fair value. Further, an entity cannot, as a separate unit of account, recognize and measure a contractual sale restriction. Additionally, the amendments require the disclosures for equity securities subject to contractual sale restrictions to include the fair value of equity securities subject to contractual sale restrictions reflected on the balance sheet, the nature and remaining duration of the restrictions and the circumstances that could cause a lapse in the restrictions. The ASU is effective for interim and annual reporting periods beginning after December 15, 2023; early adoption is permitted. The adoption of this ASU is not expected to have a material impact on the Company’s Consolidated Financial Statements. In March 2022, the FASB issued ASU 2022-02, Financial Instruments - Credit Losses (Topic 326) - Troubled Debt Restructurings and Vintage Disclosures . The amendments in this ASU enhance disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Additionally, the amendments require the disclosure of current-period gross charge-offs by year of origination for financing receivables and net investments in leases within scope. The ASU is effective for interim and annual reporting periods beginning after December 15, 2022; early adoption is permitted. The adoption of this ASU is not expected to have a material impact on the Company’s Consolidated Financial Statements.

Business Combinations and Asset

Business Combinations and Asset Acquisitions	6 Months Ended
	Jun. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Business Combination Disclosure [Text Block]	Bank of Commerce On October 1, 2021, the Company completed its acquisition of Bank of Commerce and its wholly-owned banking subsidiary Merchants Bank of Commerce. The Company acquired 100% of the equity interests of Bank of Commerce. The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. The assets and liabilities, both tangible and intangible, were recorded at their fair values as of the October 1, 2021 acquisition date. The application of the acquisition method of accounting resulted in the recognition of goodwill of $57.3 million and a CDI of $15.9 million. The goodwill represents the excess of the purchase price over the fair value of the net assets acquired. The Company paid this premium for a number of reasons, including to expand the Company’s current footprint and to enter the California market and the synergies and economies of scale expected from the acquisition. The goodwill is not deductible for income tax purposes. The table below summarizes the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed: October 1, 2021 (in thousands) Merger consideration $ 256,257 Identifiable net assets acquired, at fair value Assets acquired Cash and cash equivalents $ 155,180 Investment securities 654,480 FHLB stock 7,463 Loans, net allowance for credit loss 1,084,984 Interest receivable 5,237 Premises and equipment 17,658 Core deposit intangible 15,932 Other assets 41,963 Total assets acquired 1,982,897 Liabilities assumed Deposits (1,737,584) Subordinated debentures (10,000) Junior subordinated debentures (10,310) Other liabilities (26,076) Total liabilities assumed (1,783,970) Total fair value of identifiable net assets 198,927 Goodwill $ 57,330 See Note 8, “Goodwill and Other Intangible Assets,” for further discussion of the accounting for goodwill and other intangible assets. Of the $1.08 billion net loans acquired, $40.3 million exhibited credit deterioration on the date of purchase. The following table provides a summary of these PCD loans at acquisition: October 1, 2021 (in thousands) Par value of PCD loans acquired $ 43,419 PCD ACL at acquisition (2,616) Non-credit discount on PCD loans (525) Purchase price of PCD loans $ 40,278 The operating results of the Company reported herein include the operating results produced by the acquired assets and assumed liabilities for the period of January 1, 2022 to June 30, 2022. Disclosure of the amount of Bank of Commerce’s revenue and net income (excluding integration costs) included in Columbia’s Consolidated Statements of Income is impracticable due to the integration of the operations and accounting for this acquisition. For illustrative purposes only, the following table presents certain unaudited pro forma information for the six months ended June 30, 2021. This unaudited, estimated pro forma financial information was calculated as if Bank of Commerce had been acquired as of the beginning of the year prior to the date of acquisition. This unaudited pro forma information combines the historical results of Bank of Commerce with the Company’s consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the acquisition occurred as of the beginning of the year prior to the acquisition. The unaudited pro forma information does not consider any changes to the provision for credit losses resulting from recording loan assets at fair value. Additionally, the pro forma amounts below do not reflect Columbia’s expectations as of the date of the pro forma information of further operating cost savings and other business synergies expected to be achieved, including revenue growth as a result of the acquisition. As a result, actual amounts would have differed from the unaudited pro forma information presented. Unaudited Pro Forma for the Six Months Ended June 30, 2021 (in thousands, except per share amounts) Total revenues (net interest income plus noninterest income) $ 324,547 Net income $ 115,073 Earnings per share - basic $ 1.48 Earnings per share - diluted $ 1.48 The following table shows the impact of the merger-related expenses related to the acquisition of Bank of Commerce for the periods indicated to the various components of noninterest expense: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Noninterest Expense Compensation and employee benefits $ 569 $ — $ 939 $ — Occupancy 101 — 920 — Data processing and software 381 — 1,421 — Legal and professional fees 153 510 245 510 Advertising and promotion — — 18 — Other 545 — 794 — Total impact of merger-related expenses to noninterest expense $ 1,749 $ 510 $ 4,337 $ 510 In addition, related to the pending transaction with Umpqua, the Company recognized $2.2 million and $6.6 million of merger-related expenses for the three and six months ended June 30, 2022. While regulatory approval is still pending, integration planning efforts continue to move forward.

Securities

Securities	6 Months Ended
	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	Securities The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of debt securities: Amortized Gross Gross Fair Value June 30, 2022 (in thousands) Available for sale U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 3,447,262 $ 1,016 $ (309,514) $ 3,138,764 Other asset-backed securities 419,448 — (39,480) 379,968 State and municipal securities 989,070 629 (111,371) 878,328 U.S. government agency and government-sponsored enterprise securities 240,375 58 (11,005) 229,428 U.S. government securities 182,681 — (11,362) 171,319 Non-agency collateralized mortgage obligations 368,687 — (43,926) 324,761 Total available for sale $ 5,647,523 $ 1,703 $ (526,658) $ 5,122,568 Held to maturity U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,149,255 $ — $ (236,729) $ 1,912,526 Total held to maturity $ 2,149,255 $ — $ (236,729) $ 1,912,526 December 31, 2021 Available for sale U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 3,738,616 $ 45,077 $ (38,092) $ 3,745,601 Other asset-backed securities 469,052 3,802 (9,791) 463,063 State and municipal securities 983,704 18,525 (4,938) 997,291 U.S. government agency and government-sponsored enterprise securities 252,755 3,095 (3,274) 252,576 U.S. government securities 158,367 — (831) 157,536 Non-agency collateralized mortgage obligations 295,547 340 (955) 294,932 Total available for sale $ 5,898,041 $ 70,839 $ (57,881) $ 5,910,999 Held to maturity U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,148,327 $ 50 $ (25,771) $ 2,122,606 Total held to maturity $ 2,148,327 $ 50 $ (25,771) $ 2,122,606 There was no allowance for credit losses on both available for sale securities and held to maturity securities as of June 30, 2022 and December 31, 2021. All of the Company’s debt securities held to maturity were issued by U.S. government agencies or U.S. government-sponsored enterprises. These securities carry the explicit or implicit guarantee of the U.S. government, are widely recognized as “risk free,” and have a long history of zero credit loss. A debt security is placed on nonaccrual status at the time any principal or interest payments become 90 days delinquent. Interest accrued but not received for a security placed on nonaccrual is reversed against interest income. There were no amounts of accrued interest reversed against interest income for the three or six months ended June 30, 2022 and 2021. Accrued interest receivable for debt securities is included in “Interest receivable” on the Company’s Consolidated Balance Sheet and is not reflected in the balances in the table above. At June 30, 2022 and December 31, 2021, accrued interest receivable for securities available for sale was $18.5 million and $19.2 million, respectively. At June 30, 2022 and December 31, 2021, accrued interest receivable for securities held to maturity was $4.4 million. The Company does not measure an allowance for credit losses for accrued interest receivable. The following table provides the proceeds and both gross realized gains and losses on sales and calls of debt securities available for sale as well as other securities gains and losses for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Proceeds from sales of debt securities available for sale $ — $ 26,914 $ — $ 26,914 Gross realized gains from sales of debt securities available for sale $ — $ 751 $ — $ 751 Gross realized losses from sales of debt securities available for sale — (437) — (437) Investment securities gains, net $ — $ 314 $ — $ 314 There were no gains or losses recognized on equity securities during the three and six month periods ended June 30, 2022 and 2021. The scheduled contractual maturities of debt securities at the period presented below are as follows: June 30, 2022 Available for sale Held to maturity Amortized Cost Fair Value Amortized Cost Fair Value (in thousands) Due within one year $ 82,217 $ 82,117 $ — $ — Due after one year through five years 1,072,574 1,032,016 218,714 199,431 Due after five years through ten years 1,342,718 1,235,074 1,079,230 963,623 Due after ten years 3,150,014 2,773,361 851,311 749,472 Total debt securities $ 5,647,523 $ 5,122,568 $ 2,149,255 $ 1,912,526 The following table summarizes the carrying value of securities pledged as collateral to secure public funds, borrowings and other purposes as permitted or required by law: June 30, 2022 (in thousands) To secure public funds $ 558,331 To secure borrowings 91,525 Other securities pledged 235,258 Total securities pledged as collateral $ 885,114 The following table shows the gross unrealized losses and fair value of the Company’s debt securities available for sale for which an allowance for credit losses has not been recorded, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of the dates presented: Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized June 30, 2022 (in thousands) U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,595,623 $ (249,339) $ 390,944 $ (60,175) $ 2,986,567 $ (309,514) Other asset-backed securities 265,060 (23,946) 114,909 (15,534) 379,969 (39,480) State and municipal securities 708,006 (98,857) 73,417 (12,514) 781,423 (111,371) U.S. government agency and government-sponsored enterprise securities 87,960 (1,781) 117,326 (9,224) 205,286 (11,005) U.S. government securities 171,319 (11,362) — — 171,319 (11,362) Non-agency collateralized mortgage obligations 324,761 (43,926) — — 324,761 (43,926) Total $ 4,152,729 $ (429,211) $ 696,596 $ (97,447) $ 4,849,325 $ (526,658) December 31, 2021 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,292,062 $ (30,777) $ 176,946 $ (7,315) $ 2,469,008 $ (38,092) Other asset-backed securities 195,708 (4,823) 117,751 (4,968) 313,459 (9,791) State and municipal securities 237,354 (3,862) 40,343 (1,076) 277,697 (4,938) U.S. government agency and government-sponsored enterprise securities 100,813 (1,988) 48,714 (1,286) 149,527 (3,274) U.S. government securities 157,536 (831) — — 157,536 (831) Non-agency collateralized mortgage obligations 212,259 (955) — — 212,259 (955) Total $ 3,195,732 $ (43,236) $ 383,754 $ (14,645) $ 3,579,486 $ (57,881) Debt securities available for sale At June 30, 2022, there were 643 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligation securities in an unrealized loss position. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company concluded an allowance for credit losses is unnecessary at June 30, 2022. At June 30, 2022, there were 83 other asset-backed securities in an unrealized loss position. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company concluded an allowance for credit losses is unnecessary at June 30, 2022. At June 30, 2022, there were 520 state and municipal government securities in an unrealized loss position. The unrealized losses on state and municipal securities were caused by interest rate changes or widening of market spreads subsequent to the purchase of the individual securities. Management monitors published credit ratings of these securities for adverse changes. As of June 30, 2022, none of the rated obligations of state and local government entities held by the Company had a below investment grade credit rating. Because the credit quality of these securities are investment grade and the Company does not intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company concluded an allowance for credit losses is unnecessary at June 30, 2022. At June 30, 2022, there were 20 U.S. government agency and government-sponsored enterprise securities in an unrealized loss position. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company concluded an allowance for credit losses is unnecessary at June 30, 2022. At June 30, 2022, there were 10 U.S. government securities in an unrealized loss position. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company concluded an allowance for credit losses is unnecessary at June 30, 2022. At June 30, 2022, there were 56 non-agency collateralized mortgage obligations in an unrealized loss position. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company concluded an allowance for credit losses is unnecessary at June 30, 2022.

Loans

Loans	6 Months Ended
	Jun. 30, 2022
Loans and Leases Receivable, Net Amount [Abstract]
Loans	Loans The Company’s loan portfolio includes originated and purchased loans. The following is an analysis of the loan portfolio by segment and class (net of unearned income): June 30, 2022 December 31, 2021 (dollars in thousands) Commercial loans: Commercial real estate $ 5,251,100 $ 4,981,263 Commercial business 3,646,956 3,423,268 Agriculture 853,099 795,715 Construction 482,211 384,755 Consumer loans: One-to-four family residential real estate 1,042,190 1,013,908 Other consumer 46,831 43,028 Total loans 11,322,387 10,641,937 Less: Allowance for credit losses (149,935) (155,578) Total loans, net $ 11,172,452 $ 10,486,359 At June 30, 2022 and December 31, 2021, the Company had no material foreign activities. Substantially all of the Company’s loans and unfunded commitments are geographically concentrated in its service areas within the states of Washington, Oregon, Idaho and California. At June 30, 2022 and December 31, 2021, $4.24 billion and $3.49 billion of commercial and residential real estate loans were pledged as collateral on FHLB advances and additional borrowing capacity. The Company also pledged $200.3 million and $200.5 million of commercial loans to the FRB for additional borrowing capacity at June 30, 2022 and December 31, 2021, respectively. Accrued interest receivable for loans is included in “Interest receivable” on the Company’s Consolidated Balance Sheet and is not reflected in the balances in the table above. At June 30, 2022 and December 31, 2021, accrued interest receivable for loans was $34.3 million and $32.4 million, respectively. The Company does not measure an allowance for credit losses for accrued interest receivable. The following is an aging of the recorded investment of the loan portfolio at the dates presented: Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans June 30, 2022 (in thousands) Commercial loans: Commercial real estate $ 5,244,961 $ 1,281 $ 2,183 $ — $ 3,464 $ 2,675 $ 5,251,100 Commercial business 3,621,858 14,910 241 — 15,151 9,947 3,646,956 Agriculture 849,483 400 — — 400 3,216 853,099 Construction 481,238 973 — — 973 — 482,211 Consumer loans: One-to-four family residential real estate 1,038,770 1,537 743 — 2,280 1,140 1,042,190 Other consumer 46,693 108 10 — 118 20 46,831 Total $ 11,283,003 $ 19,209 $ 3,177 $ — $ 22,386 $ 16,998 $ 11,322,387 Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans December 31, 2021 (in thousands) Commercial loans: Commercial real estate $ 4,977,781 $ — $ 1,610 $ — $ 1,610 $ 1,872 $ 4,981,263 Commercial business 3,406,539 2,721 687 — 3,408 13,321 3,423,268 Agriculture 789,112 1,207 — — 1,207 5,396 795,715 Construction 384,755 — — — — — 384,755 Consumer loans: One-to-four family residential real estate 1,010,343 921 211 — 1,132 2,433 1,013,908 Other consumer 42,998 11 — — 11 19 43,028 Total $ 10,611,528 $ 4,860 $ 2,508 $ — $ 7,368 $ 23,041 $ 10,641,937 Loan payments are considered timely when the contractual principal or interest due in accordance with the terms of the loan agreement or any portion thereof is received on the due date of the scheduled payment. Nonaccrual loans are generally loans placed on a nonaccrual basis when they become 90 days past due or when there are otherwise serious doubts about the collectability of principal or interest within the existing terms of the loan. The Company’s policy is to write-off all accrued interest on loans when they are placed on nonaccrual status. The following table summarizes written-off interest on nonaccrual loans for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Commercial loans $ 71 $ 212 $ 139 $ 424 Consumer loans 1 2 8 9 Total $ 72 $ 214 $ 147 $ 433 The following summarizes the amortized cost of nonaccrual loans for which there was no related ACL for the periods indicated: June 30, 2022 December 31, 2021 (in thousands) Commercial loans: Commercial real estate $ 1,760 $ 932 Commercial business 4,036 5,131 Agriculture 2,079 3,756 Consumer loans: One-to-four family residential real estate 751 — Total $ 8,626 $ 9,819 The following is an analysis of loans classified as TDR for the periods indicated: Three Months Ended June 30, 2022 Three Months Ended June 30, 2021 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial loans: Commercial business — — — 4 $ 1,757 $ 1,757 Total — $ — $ — 4 $ 1,757 $ 1,757 Six Months Ended June 30, 2022 Six Months Ended June 30, 2021 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial loans: Commercial real estate — $ — $ — 1 $ 628 $ 628 Commercial business — — — 11 2,600 2,600 Agriculture 1 633 633 — — — Consumer loans: One-to-four family residential real estate — — — 2 140 140 Total 1 $ 633 $ 633 14 $ 3,368 $ 3,368 The Company’s loans classified as TDR are loans that have been modified or with respect to which the borrower has been granted special concessions due to financial difficulties that, if not for the challenges of the borrower, the Company would not otherwise consider. The TDR modifications or concessions are made to increase the likelihood that these borrowers with financial difficulties will be able to satisfy their debt obligations as amended. The concessions granted in the restructurings, summarized in the table above, largely consisted of maturity extensions, interest rate modifications or a combination of both. In limited circumstances, a reduction in the principal balance of the loan could also be made as a concession. Loans classified as TDR are included with the loans collectively measured for credit losses. The Company had commitments to lend $299 thousand of additional funds on loans classified as TDR as of June 30, 2022. The Company had $1.5 million of such commitments at December 31, 2021. The Company had no loans classified as TDR that defaulted within 12 months of being classified as TDR during the three and six months ended June 30, 2022 and December 31, 2021.

Allowance for Credit Losses and

Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit	6 Months Ended
	Jun. 30, 2022
Allowance For Credit Losses and Allowance for Unfunded Commitments and Letters Of Credit [Abstract]
Allowance For Credit Losses And Allowance for Unfunded Loan Commitments And Letters Of Credit Text Block	Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit The ACL is determined through quarterly assessments of the present value of expected future cash flows within the loan portfolio, which, are deducted from the loan’s amortized cost basis to determine the expected credit losses of the loan portfolio. We estimate the ACL using relevant and reliable available information, which is derived from both internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Additions to and recaptures from the ACL are charged to current period earnings through the provision for credit losses. Loan amounts that are determined to be uncollectible are charged directly against the ACL and netted against amounts recovered on previously charged-off loans. For the purpose of calculating portfolio level reserves, we have segmented our loan portfolio into two portfolio segments (Commercial and Consumer). The Commercial and Consumer portfolio segments are then further broken down into loan classes by risk characteristics. The risk characteristics include regulatory call codes, type of industry, risk ratings and collateral type. The ACL is comprised of reserves measured on a collective (pool) basis using a quantitative DCF model for all loan classes with similar risk characteristics and then qualitatively adjusted for large loan concentrations, policy exemptions granted and other factors. The quantitative DCF model utilizes anticipated period cash flows determined on a loan-level basis. The anticipated cash flows take into account contractual principal and interest payments, anticipated segment level prepayments, probability of defaults and historical loss given defaults. The majority of our loan classes utilize regression models to calculate probability of defaults, in which macroeconomic factors are correlated to historical quarterly defaults. The Commercial segment multi-factor models utilize a mix of 15 macroeconomic factors, including the four most commonly used factors: Real GDP, National Unemployment Rate, Disposable Personal Income and Private Inventories. The Consumer segment multi-factor models utilize a mix of three macroeconomic factors: National Unemployment Rate, Home Price Index and Disposable Income. The Company utilizes an 18 month reasonable and supportable forecast for the macroeconomic factors, after which the probability of default reverts to its historical mean using a straight-line basis constructed on each macroeconomic factor’s absolute historical quarterly change. Loans are individually measured for credit losses if they do not share similar risk characteristics of other loans within their respective pools. Individually measured loans are primarily nonaccrual and collateral dependent with balances equal to or greater than $500,000 and for which the borrower is experiencing financial difficulty such that full satisfaction of the contractual terms of the loan is in question. Commercial real estate loans are secured by commercial real estate, including owner occupied and non-owner occupied commercial real estate, as well as multifamily residential real estate. Commercial business loans are primarily secured by non-real estate collateral, including equipment and other non-real estate fixed assets, inventory, receivables and cash. Agricultural loans are secured by farmland and other agricultural real estate, as well as equipment, inventory, such as crops and livestock, non-real estate fixed assets and cash. Construction loans are secured by one-to-four family residential real estate and commercial real estate in varying stages of development. One-to-four family residential real estate loans are secured by one-to-four family residential properties. Other consumer loans are secured by personal property. For collateral dependent loans, the Company calculates the allowance as the difference between the amortized cost of the loan and the fair market value of the collateral. The fair market value of the collateral is determined by either the discounted expected future cash flows from the operation of the collateral or the appraised value of the collateral, less costs to sell. If the fair value of the collateral is greater than the amortized cost of the loan, no reserve is recorded. The Company also records an allowance for credit losses on unfunded loan commitments and letters of credit. We estimate expected credit losses on unfunded commitments in which we are exposed to credit risk, unless we have the option to unconditionally cancel the obligation. Expected credit losses are calculated based on the likelihood that funding will occur and an estimate of what will be funded by analyzing the most recent four-quarter utilization rates, current utilization and our quantitative ACL rate. The allowance for unfunded commitments and letters of credit is included in “Other Liabilities” on the Consolidated Balance Sheets, with changes to the balance being charged to noninterest expense. We do not measure an allowance for credit losses on accrued interest receivable balances because these balances are written-off in a timely manner as a reduction to interest income when loans are placed on nonaccrual status. The following tables show a detailed analysis of the ACL for the periods indicated: Beginning Balance Charge-offs Recoveries Provision Ending Balance Three Months Ended June 30, 2022 (in thousands) Commercial loans: Commercial real estate $ 57,307 $ (299) $ 147 $ (36) $ 57,119 Commercial business 50,474 (92) 797 806 51,985 Agriculture 8,010 (1) 24 862 8,895 Construction 5,399 — 136 379 5,914 Consumer loans: One-to-four family residential real estate 24,356 (3) 291 (18) 24,626 Other consumer 1,403 (241) 127 107 1,396 Total $ 146,949 $ (636) $ 1,522 $ 2,100 $ 149,935 Beginning Balance Charge-offs Recoveries Provision Ending Balance Six Months Ended June 30, 2022 Commercial loans: Commercial real estate $ 61,254 $ (299) $ 161 $ (3,997) $ 57,119 Commercial business 54,712 (1,724) 1,088 (2,091) 51,985 Agriculture 8,148 (24) 149 622 8,895 Construction 5,397 — 144 373 5,914 Consumer loans: One-to-four family residential real estate 24,123 (3) 585 (79) 24,626 Other consumer 1,944 (487) 467 (528) 1,396 Total $ 155,578 $ (2,537) $ 2,594 $ (5,700) $ 149,935 Beginning Balance Charge-offs Recoveries Provision Ending Balance Three Months Ended June 30, 2021 (in thousands) Commercial loans: Commercial real estate $ 57,050 $ (316) $ 16 $ (3,500) $ 53,250 Commercial business 58,405 (971) 874 (754) 57,554 Agriculture 9,487 (122) 5 (1,450) 7,920 Construction 6,551 — 521 (513) 6,559 Consumer loans: One-to-four family residential real estate 15,638 (146) 503 524 16,519 Other consumer 1,163 (385) 215 193 1,186 Total $ 148,294 $ (1,940) $ 2,134 $ (5,500) $ 142,988 Beginning Balance Charge-offs Recoveries Provision Ending Balance Six Months Ended June 30, 2021 Commercial loans: Commercial real estate $ 68,934 $ (316) $ 52 $ (15,420) $ 53,250 Commercial business 45,250 (4,310) 4,088 12,526 57,554 Agriculture 9,052 (122) 17 (1,027) 7,920 Construction 7,636 — 567 (1,644) 6,559 Consumer loans: One-to-four family residential real estate 16,875 (146) 554 (764) 16,519 Other consumer 1,393 (512) 276 29 1,186 Total $ 149,140 $ (5,406) $ 5,554 $ (6,300) $ 142,988 The $5.6 million decrease in the ACL at June 30, 2022 compared to the ACL at December 31, 2021 was primarily due to significant improvements in portfolio risk ratings. Additionally, problem loans decreased during the period and their percentage within the portfolio is now near pre-pandemic levels. Specifically regarding the forecast used in the June 30, 2022 estimate, management expects the forecasted national unemployment rate to be near pre-pandemic levels early in the forecast period, increasing a little later in the forecast period. Additionally, the commercial real estate index is expected to grow more slowly throughout the year. The home price index is projected to moderate over the forecast period and real GDP growth is projected to slow in 2022. The models used for calculating the ACL are sensitive to changes in these and other economic factors, which could result in volatility as these assumptions change over time. The ACL at June 30, 2022 does not include a reserve for the PPP loans as these loans are fully guaranteed by the SBA. Changes in the allowance for unfunded commitments and letters of credit, a component of “Other liabilities” in the Consolidated Balance Sheets, are summarized as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Beginning balance $ 9,000 $ 9,800 $ 8,500 $ 8,300 Net changes in the allowance for unfunded commitments and letters of credit — 200 500 1,700 Ending balance $ 9,000 $ 10,000 $ 9,000 $ 10,000 Credit Quality Indicators The extension of credit in the form of loans or other credit products to consumer and commercial clients is one of our principal business activities. Our policies and applicable laws and regulations require risk analysis as well as ongoing portfolio and credit management. We manage our credit risk through lending limit constraints, credit review, approval policies and extensive, ongoing internal monitoring. We also manage credit risk through diversification of the loan portfolio by type of loan, type of industry and type of borrower and by limiting the aggregation of debt to a single borrower. We evaluate the credit quality of our loan portfolio using regulatory risk ratings, which are based on relevant information about the borrower’s financial condition, including current financial condition, historical payment experience, credit documentation and current economic trends. Risk ratings are reviewed and updated whenever appropriate, with more periodic reviews as the risk and dollar value of the loss on the loan increases. All loans risk rated special mention or worse with amortized costs exceeding $250 thousand are reviewed at least quarterly with more frequent review for specific loans. Pass rated loans are generally considered to have sufficient sources of repayment in order to repay the loan in full in accordance with all terms and conditions. Special Mention rated loans have potential weaknesses that, if left uncorrected, may result in deterioration of the repayment prospects for the asset or in the Company’s credit position at some future date. Loans with a risk rating of Substandard or worse are reviewed to assess the ability of our borrowers to service all interest and principal obligations and, as a result, the risk rating or accrual status may be adjusted accordingly. Loans risk rated as Substandard reflect loans where a loss is possible if loan weaknesses are not corrected. Doubtful rated loans have a high probability of loss; however, the amount of loss has not yet been determined. Loss rated loans are considered uncollectible and when identified, are charged-off. The following is an analysis of the credit quality of our loan portfolio as of the periods indicated: Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Term Loans Amortized Cost Basis by Origination Year 2022 2021 2020 2019 2018 Prior Total June 30, 2022 (in thousands) Commercial loans: Commercial real estate Pass $ 705,896 $ 1,033,579 $ 709,061 $ 629,353 $ 450,830 $ 1,490,341 $ 54,099 $ 6,325 $ 5,079,484 Special mention — 1,882 1,373 30,655 1,424 26,442 — — 61,776 Substandard — 2,187 9,460 22,464 4,274 70,421 999 35 109,840 Total commercial real estate $ 705,896 $ 1,037,648 $ 719,894 $ 682,472 $ 456,528 $ 1,587,204 $ 55,098 $ 6,360 $ 5,251,100 Commercial business Pass $ 305,290 $ 742,045 $ 386,970 $ 239,935 $ 191,713 $ 306,756 $ 1,313,072 $ 5,325 $ 3,491,106 Special mention — 5,434 1,924 6,877 311 205 22,562 206 37,519 Substandard — 4,253 3,697 18,494 23,571 30,124 37,477 715 118,331 Total commercial business $ 305,290 $ 751,732 $ 392,591 $ 265,306 $ 215,595 $ 337,085 $ 1,373,111 $ 6,246 $ 3,646,956 Agriculture Pass $ 63,852 $ 134,066 $ 77,772 $ 75,835 $ 24,957 $ 108,954 $ 325,438 $ 666 $ 811,540 Special mention — 152 — 196 — — 618 — 966 Substandard — 1,524 6,621 548 1,134 2,753 28,013 — 40,593 Total agriculture $ 63,852 $ 135,742 $ 84,393 $ 76,579 $ 26,091 $ 111,707 $ 354,069 $ 666 $ 853,099 Construction Pass $ 106,490 $ 246,371 $ 40,102 $ 14,137 $ 2,702 $ 4,849 $ 64,558 $ — $ 479,209 Special mention — 761 — — 453 — — — 1,214 Substandard — — — 1,737 — 51 — — 1,788 Total construction $ 106,490 $ 247,132 $ 40,102 $ 15,874 $ 3,155 $ 4,900 $ 64,558 $ — $ 482,211 Consumer loans: One-to-four family residential real estate Pass $ 88,455 $ 368,446 $ 128,930 $ 44,689 $ 41,821 $ 102,116 $ 264,454 $ 429 $ 1,039,340 Substandard — 751 77 — 515 1,247 3 257 2,850 Total one-to-four family real estate $ 88,455 $ 369,197 $ 129,007 $ 44,689 $ 42,336 $ 103,363 $ 264,457 $ 686 $ 1,042,190 Other consumer Pass $ 3,931 $ 3,671 $ 1,934 $ 1,415 $ 1,899 $ 10,082 $ 23,855 $ 5 $ 46,792 Substandard — 25 — 3 — 11 — — 39 Total consumer $ 3,931 $ 3,696 $ 1,934 $ 1,418 $ 1,899 $ 10,093 $ 23,855 $ 5 $ 46,831 Total $ 1,273,914 $ 2,545,147 $ 1,367,921 $ 1,086,338 $ 745,604 $ 2,154,352 $ 2,135,148 $ 13,963 $ 11,322,387 Less: Allowance for credit losses 149,935 Loans, net $ 11,172,452 Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Term Loans Amortized Cost Basis by Origination Year 2021 2020 2019 2018 2017 Prior Total December 31, 2021 (in thousands) Commercial loans: Commercial real estate Pass $ 1,068,493 $ 760,545 $ 650,593 $ 492,348 $ 515,233 $ 1,180,115 $ 74,754 $ 3,644 $ 4,745,725 Special mention 2,252 — 19,016 6,196 163 27,270 — 2,199 57,096 Substandard 4,119 5,897 45,769 9,112 29,917 82,599 1,029 — 178,442 Total commercial real estate $ 1,074,864 $ 766,442 $ 715,378 $ 507,656 $ 545,313 $ 1,289,984 $ 75,783 $ 5,843 $ 4,981,263 Commercial business Pass $ 891,957 $ 426,004 $ 280,823 $ 217,605 $ 144,363 $ 232,356 $ 1,028,616 $ 35,411 $ 3,257,135 Special mention 621 135 6,097 747 105 51 34,256 236 42,248 Substandard 4,329 4,610 18,393 28,066 20,568 27,462 18,796 1,661 123,885 Total commercial business $ 896,907 $ 430,749 $ 305,313 $ 246,418 $ 165,036 $ 259,869 $ 1,081,668 $ 37,308 $ 3,423,268 Agriculture Pass $ 147,561 $ 87,964 $ 74,658 $ 29,739 $ 46,058 $ 79,693 $ 266,573 $ 5,448 $ 737,694 Special mention 162 — 445 — — — 565 — 1,172 Substandard — 7,717 9,148 1,616 5,532 1,833 29,125 1,878 56,849 Total agriculture $ 147,723 $ 95,681 $ 84,251 $ 31,355 $ 51,590 $ 81,526 $ 296,263 $ 7,326 $ 795,715 Construction Pass $ 228,661 $ 53,880 $ 35,795 $ 3,183 $ 3,285 $ 2,189 $ 55,765 $ — $ 382,758 Substandard — — 1,748 — — 249 — — 1,997 Total construction $ 228,661 $ 53,880 $ 37,543 $ 3,183 $ 3,285 $ 2,438 $ 55,765 $ — $ 384,755 Consumer loans: One-to-four family real estate Pass $ 390,153 $ 140,799 $ 56,520 $ 51,549 $ 32,447 $ 111,307 $ 222,747 $ 1,347 $ 1,006,869 Substandard 85 470 183 562 234 4,736 485 284 7,039 Total one-to-four family real estate $ 390,238 $ 141,269 $ 56,703 $ 52,111 $ 32,681 $ 116,043 $ 223,232 $ 1,631 $ 1,013,908 Other consumer Pass $ 7,045 $ 2,711 $ 1,950 $ 13,489 $ 560 $ 1,277 $ 15,853 $ 97 $ 42,982 Substandard — — — — 1 13 23 9 46 Total consumer $ 7,045 $ 2,711 $ 1,950 $ 13,489 $ 561 $ 1,290 $ 15,876 $ 106 $ 43,028 Total $ 2,745,438 $ 1,490,732 $ 1,201,138 $ 854,212 $ 798,466 $ 1,751,150 $ 1,748,587 $ 52,214 $ 10,641,937 Less: Allowance for credit losses 155,578 Loans, net $ 10,486,359

Other Real Estate Owned

Other Real Estate Owned	6 Months Ended
	Jun. 30, 2022
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Other Real Estate Owned	Other Real Estate Owned The following tables set forth activity in OREO for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Balance, beginning of period $ 381 $ 521 $ 381 $ 553 Valuation adjustments (149) (140) (149) (140) Proceeds from sale of OREO property (200) — (200) (132) Gain on sale of OREO, net 1 — 1 100 Balance, end of period $ 33 $ 381 $ 33 $ 381 At June 30, 2022, there were no foreclosed residential real estate properties held as OREO. Additionally, there were no consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Other Intangible Assets Goodwill is not amortized but is reviewed for potential impairment at the reporting unit level. Management analyzes its goodwill for impairment on an annual basis on July 31 and between annual tests in certain circumstances such as material adverse changes in legal, business, regulatory and economic factors. An impairment loss is recorded to the extent that the carrying amount of goodwill exceeds its implied fair value. Our CDIs are evaluated for impairment if events and circumstances indicate a possible impairment. Each CDI is amortized on an accelerated basis over an estimated life of 10 years. The following table sets forth activity for goodwill and other intangible assets for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Goodwill Total goodwill $ 823,172 $ 765,842 $ 823,172 $ 765,842 Other intangible assets, net CDI: Gross CDI balance at beginning of period (1) 88,931 105,473 88,931 105,473 Accumulated amortization at beginning of period (57,491) (81,582) (55,203) (79,658) CDI, net at beginning of period 31,440 23,891 33,728 25,815 CDI current period amortization (2,219) (1,852) (4,507) (3,776) Total CDI, net at end of period 29,221 22,039 29,221 22,039 Intangible assets not subject to amortization 919 919 919 919 Other intangible assets, net at end of period 30,140 22,958 30,140 22,958 Total goodwill and other intangible assets at end of period $ 853,312 $ 788,800 $ 853,312 $ 788,800 __________ (1) For the three and six months ended June 30, 2022 , the gross CDI balance, beginning of period excludes fully amortized amounts. Prior period columns has not been adjusted. The following table provides the estimated future amortization expense of our CDI for the remaining six months ending December 31, 2022 and the succeeding four years: Total (in thousands) Remainder of 2022 $ 4,191 2023 7,082 2024 5,673 2025 4,366 2026 3,225

Revolving Line of Credit

Revolving Line of Credit	6 Months Ended
	Jun. 30, 2022
Line of Credit [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Revolving Line of CreditThe Company has a $15.0 million short-term credit facility with an unaffiliated bank. This facility, which expires May 25, 2023, has a variable interest rate and provides the Company additional liquidity, if needed, for various corporate activities. There was no outstanding balance at both June 30, 2022 and December 31, 2021. The credit agreement requires the Company to comply with certain covenants including those related to asset quality and capital levels. The Company was in compliance with all covenants associated with this facility at June 30, 2022.

Derivatives and Balance Sheet O

Derivatives and Balance Sheet Offsetting	6 Months Ended
	Jun. 30, 2022
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Derivatives and Hedging Activities	Derivatives, Hedging Activities and Balance Sheet Offsetting The Company is exposed to certain risks arising from both its business and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity and credit risk, primarily by managing the amount, sources and duration of its assets and liabilities as well as the use of derivative financial instruments. Specifically, the Company enters into interest rate-based 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 Company’s derivative financial instruments are used to manage differences in the amount, timing and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to the Company’s loan portfolio. The Company’s objectives in using interest rate derivatives are to add stability to interest income and to manage its exposure to interest rate movements. To accomplish this objective, the Company used an interest rate collar as part of its interest rate risk management strategy. Interest rate collars designated as cash flow hedges involve the payments of variable-rate amounts if interest rates rise above the cap strike rate on the contract and receipts of variable-rate amounts if interest rates fall below the floor strike rate on the contract. These derivative contracts were used to hedge the variable cash flows associated with existing variable-rate assets. With respect to derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in accumulated other comprehensive income (loss) and subsequently reclassified into interest income in the same period(s) during which the hedged transaction affects earnings. Amounts reported in accumulated other comprehensive income (loss) related to derivatives are reclassified to interest income as interest payments are received on the Company’s variable-rate assets. During the next 12 months, the Company estimates that there will be $10.4 million reclassified as an increase to interest income. The Company may use derivatives to hedge the risk or changes in the fair values of interest rate lock commitments and residential mortgage loans held for sale. These derivatives are not designated as hedging instruments. Rather, they are accounted for as free-standing derivatives, or economic hedges, with changes in the fair value of the derivatives reported in income. The Company primarily utilizes interest rate forward loan sales contracts in its derivative risk management strategy. The Company enters into forward delivery contracts to sell residential mortgage loans to broker-dealers at specific prices and dates in order to hedge the interest rate risk in its portfolio of mortgage loans held for sale and its residential mortgage interest rate lock commitments. Credit risk associated with forward contracts is limited to the replacement cost of those forward contracts in a gain position. There were no counterparty default losses on forward contracts during the three and six months ended June 30, 2022 and 2021. Market risk with respect to forward contracts arises principally from changes in the value of contractual positions due to changes in interest rates. The Bank limits its exposure to market risk by monitoring differences between commitments to customers and forward contracts with broker-dealers. In the event the Company has forward delivery contract commitments in excess of available mortgage loans, the Company completes the transaction by either paying or receiving a fee to or from the broker-dealer equal to the increase or decrease in the market value of the forward contract. At June 30, 2022 and December 31, 2021, the Bank had commitments to originate mortgage loans held for sale totaling $8.8 million and $21.8 million, respectively, and forward sales commitments of $7.5 million and $18.5 million, respectively, which are used to hedge both on-balance sheet and off-balance sheet exposures. In addition, the Company periodically enters into certain commercial loan interest rate swap agreements in order to provide commercial loan customers the ability to convert from variable to fixed interest rates. Under these agreements, the Company enters into a variable-rate loan agreement with a customer in addition to a swap agreement. This swap agreement effectively converts the customer’s variable rate loan into a fixed rate. The Company then enters into a corresponding swap agreement with a third-party in order to offset its exposure on the variable and fixed components of the customer agreement. As the interest rate swap agreements with the customers and third parties are not designated as hedges under the Derivatives and Hedging topic of the FASB ASC, the instruments are marked to market in earnings. The notional amount of open interest rate swap agreements at June 30, 2022 and December 31, 2021 was $522.5 million and $570.2 million, respectively. The following table presents the fair value of derivatives, as well as their classification on the Consolidated Balance Sheet as of the dates presented: Asset Derivatives Liability Derivatives June 30, 2022 December 31, 2021 June 30, 2022 December 31, 2021 Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value (in thousands) Derivatives not designated as hedging instruments: Interest rate lock commitments Other assets $ 90 Other assets $ 356 Other liabilities $ — Other liabilities $ — Interest rate forward loan sales contracts Other assets $ — Other assets $ — Other liabilities $ 20 Other liabilities $ 27 Interest rate swap contracts Other assets $ 24,063 Other assets $ 24,257 Other liabilities $ 24,063 Other liabilities $ 24,257 The table below presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) for the periods indicated: Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income Three Months Ended June 30, 2022 2021 (in thousands) Interest rate collar Interest income $ 2,603 $ 2,602 Six Months Ended June 30, 2022 2021 (in thousands) Interest rate collar Interest income $ 5,178 $ 5,178 In January 2019, the Company entered into a $500.0 million notional interest rate collar with a five-year term. In October 2020, the collar was terminated and resulted in a $34.4 million realized gain that was recorded in accumulated other comprehensive income, net of deferred income taxes. The gain will amortize through February 2024 into interest income. The gain will be amortized in this manner as long as the cash flows pertaining to the hedged item are expected to occur. The following table summarizes the types of derivatives not designated as hedging instruments and the gains (losses) recorded during the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Interest rate lock commitments $ 53 $ (340) $ (266) $ (511) Interest rate forward loan sales contracts (333) (527) 7 143 Interest rate swap contracts — (40) — 72 Total derivative gains (losses) $ (280) $ (907) $ (259) $ (296) The gains and losses on the Company’s mortgage banking derivatives are included in loan revenue. Mark-to-market gains and losses on the Company’s interest rate swap contracts are recorded to “Other” noninterest expense. The Company is party to interest rate swap contracts and repurchase agreements that are subject to enforceable master netting arrangements or similar agreements. Under these agreements, the Company may have the right to net settle multiple contracts with the same counterparty. The following tables show the gross interest rate swap contracts, collar agreements and repurchase agreements in the Consolidated Balance Sheets and the respective collateral received or pledged in the form of cash or other financial instruments. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of over-collateralization are not shown. Gross Amounts of Recognized Assets/Liabilities Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheets Collateral Pledged/Received Net Amount June 30, 2022 (in thousands) Assets Interest rate swap contracts $ 24,063 $ — $ 24,063 $ (24,063) $ — Liabilities Interest rate swap contracts $ 24,063 $ — $ 24,063 $ (180) $ 23,883 Repurchase agreements $ 70,349 $ — $ 70,349 $ (70,349) $ — December 31, 2021 Assets Interest rate swap contracts $ 24,257 $ — $ 24,257 $ (450) $ 23,807 Liabilities Interest rate swap contracts $ 24,257 $ — $ 24,257 $ (20,747) $ 3,510 Repurchase agreements $ 86,013 $ — $ 86,013 $ (86,013) $ — The Company’s agreements with each of its derivative counterparties provide that if the Company defaults or is capable of being declared in default on any of its indebtedness, then the Company could also be declared in default on its derivative obligations. The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements: Remaining contractual maturity of the agreements Overnight and continuous Up to 30 days 30 - 90 days Greater than 90 days Total June 30, 2022 (in thousands) Class of collateral pledged for repurchase agreements U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 70,349 $ — $ — $ — $ 70,349 Gross amount of recognized liabilities for repurchase agreements 70,349 Amounts related to agreements not included in offsetting disclosure $ — The collateral utilized for the Company’s repurchase agreements is subject to market fluctuations as well as prepayments of principal. The Company monitors the risk of the fair value of its pledged collateral falling below acceptable amounts based on the type of the underlying repurchase agreement. The pledged collateral related to the Company’s $70.3 million sweep repurchase agreements, which mature on an overnight basis, is monitored on a daily basis as the underlying sweep accounts can have frequent transaction activity and the amount of pledged collateral is adjusted as necessary.

Commitments and contingent liab

Commitments and contingent liabilities	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Commitments and Contingent Liabilities Lease Commitments: The Company’s lease commitments consist primarily of leased locations under various non-cancellable operating leases that expire between 2022 and 2043. The majority of the leases contain renewal options and provisions for increases in rental rates based on an agreed upon index or predetermined escalation schedule. Financial Instruments with Off-Balance Sheet Risk: In the normal course of business, the Company makes loan commitments (typically unfunded loans and unused lines of credit) and issues standby letters of credit to accommodate the financial needs of its customers. At June 30, 2022 and December 31, 2021, the Company’s loan commitments amounted to $3.71 billion and $3.50 billion, respectively. Standby letters of credit commit the Company to make payments on behalf of customers under specified conditions. Historically, no significant losses have been incurred by the Company under standby letters of credit. Both arrangements have credit risk essentially the same as that involved in extending loans to customers and are subject to the Company’s normal credit policies, including collateral requirements, where appropriate. Standby letters of credit were $34.2 million and $36.0 million at June 30, 2022 and December 31, 2021, respectively. Commercial and similar letters of credit and other off-balance sheet liabilities were $66 thousand as of June 30, 2022, while there were none at December 31, 2021. Legal Proceedings: The Company and its subsidiaries are from time to time defendants in and are threatened with various legal proceedings arising from their regular business activities. Management, after consulting with legal counsel, is of the opinion that the ultimate liability, if any, resulting from these pending or threatened actions and proceedings will not have a material effect on the financial statements of the Company.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2022
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders’ Equity Dividends: The following table summarizes year-to-date dividend activity: Declared Regular Cash Dividends Per Common Share Record Date Paid Date January 19, 2022 $ 0.30 February 2, 2022 February 16, 2022 April 21, 2022 $ 0.30 May 4, 2022 May 18, 2022 The payment of cash dividends is subject to federal regulatory requirements for capital levels and other restrictions. In addition, the cash dividends paid by Columbia Bank to the Company are subject to both federal and state regulatory requirements.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income (Loss) The following table shows changes in accumulated other comprehensive income (loss) by component for the periods indicated: Unrealized Gains and Losses on Available for Sale Securities (1) Unrealized Gains and Losses on Pension Plan Liability (1) Unrealized Gains and Losses on Hedging Instruments (1) Total (1) Three Months Ended June 30, 2022 (in thousands) Beginning balance $ (237,930) $ (4,711) $ 14,864 $ (227,777) Other comprehensive loss before reclassifications (152,860) — — (152,860) Amounts reclassified from accumulated other comprehensive loss (2) (2,080) 100 (1,998) (3,978) Net current-period other comprehensive income (loss) (154,940) 100 (1,998) (156,838) Ending balance $ (392,870) $ (4,611) $ 12,866 $ (384,615) Three Months Ended June 30, 2021 Beginning balance $ 60,569 $ (5,718) $ 22,877 $ 77,728 Other comprehensive income before reclassifications 21,850 — — 21,850 Amounts reclassified from accumulated other comprehensive income (2) (586) 115 (1,998) (2,469) Net current-period other comprehensive income (loss) 21,264 115 (1,998) 19,381 Ending balance $ 81,833 $ (5,603) $ 20,879 $ 97,109 Six Months Ended June 30, 2022 Beginning balance $ 23,134 $ (4,812) $ 16,840 $ 35,162 Other comprehensive loss before reclassifications (412,848) — — (412,848) Amounts reclassified from accumulated other comprehensive income (2) (3,156) 201 (3,974) (6,929) Net current-period other comprehensive income (loss) (416,004) 201 (3,974) (419,777) Ending balance $ (392,870) $ (4,611) $ 12,866 $ (384,615) Six Months Ended June 30, 2021 Beginning balance $ 163,174 $ (5,833) $ 24,854 $ 182,195 Other comprehensive loss before reclassifications (80,755) — — (80,755) Amounts reclassified from accumulated other comprehensive income (2) (586) 230 (3,975) (4,331) Net current-period other comprehensive income (loss) (81,341) 230 (3,975) (85,086) Ending balance $ 81,833 $ (5,603) $ 20,879 $ 97,109 __________ (1) All amounts are net of tax. Amounts in parentheses indicate debits. (2) See following table for details about these reclassifications. The following table shows details regarding the reclassifications from accumulated other comprehensive income (loss) for the periods indicated: Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended June 30, Six Months Ended June 30, Affected line Item in the Consolidated 2022 2021 2022 2021 Statement of Income (in thousands) Unrealized gains on available for sale debt securities $ — $ 314 $ — $ 314 Investment securities gains, net Amortization of unrealized gains related to securities transfer 2,710 450 4,112 450 Taxable securities 2,710 764 4,112 764 Total before tax (630) (178) (956) (178) Income tax provision $ 2,080 $ 586 $ 3,156 $ 586 Net of tax Amortization of pension plan liability actuarial losses $ (131) $ (149) $ (262) $ (299) Compensation and employee benefits (131) (149) (262) (299) Total before tax 31 34 61 69 Income tax provision $ (100) $ (115) $ (201) $ (230) Net of tax Unrealized gains from hedging instruments $ 2,603 $ 2,602 $ 5,178 $ 5,178 Loans 2,603 2,602 5,178 5,178 Total before tax (605) (604) (1,204) (1,203) Income tax provision $ 1,998 $ 1,998 $ 3,974 $ 3,975 Net of tax

Fair Value Accounting and Measu

Fair Value Accounting and Measurement	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Accounting and Measurement	Fair Value Accounting and Measurement The Fair Value Measurements and Disclosures topic of the FASB ASC defines fair value, establishes a consistent framework for measuring fair value and expands disclosure requirements about fair value. We hold fixed and variable rate interest-bearing securities, investments in marketable equity securities and certain other financial instruments, which are carried at fair value. Fair value is determined based upon quoted prices when available or through the use of alternative approaches, such as matrix or model pricing, when market quotes are not readily accessible or available. The valuation techniques are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our own market assumptions. These two types of inputs create the following fair value hierarchy: Level 1 – Quoted prices for identical instruments in active markets that are accessible at the measurement date. Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 – Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable. Fair values are determined as follows: Debt securities at fair value are priced using a combination of market activity, industry recognized information sources, yield curves, discounted cash flow models and other factors. These fair value calculations are considered a Level 2 input method under the provisions of the Fair Value Measurements and Disclosures topic of the FASB ASC for all debt securities. Loans held for sale include the fair value of residential mortgage loans originated as held for sale determined based on quoted secondary market prices for similar loans, including the implicit fair value of embedded servicing rights. The change in fair value of loans held for sale is primarily driven by changes in interest rates subsequent to loan funding and changes in the fair value of the related servicing asset, resulting in revaluation adjustments to the recorded fair value. The fair values of the interest rate lock commitments and interest rate forward loan sales contracts are estimated using quoted or published market prices for similar instruments, adjusted for factors such as pull-through rate assumptions based on historical information, where appropriate. The pull-through rate assumptions are considered Level 3 valuation inputs and are significant to the interest rate lock commitment valuation; as such, the interest rate lock commitment derivatives are classified as Level 3. Interest rate contracts and the interest rate collar are valued in models, which use as their basis, readily observable market parameters and are classified within Level 2 of the valuation hierarchy. The following tables set forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at the dates presented by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement: Fair Value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 June 30, 2022 (in thousands) Assets Debt securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 3,138,764 $ — $ 3,138,764 $ — Other asset-backed securities 379,968 — 379,968 — State and municipal securities 878,328 — 878,328 — U.S. government agency and government-sponsored enterprise securities 229,428 — 229,428 — U.S. government securities 171,319 171,319 — Non-agency collateralized mortgage obligations 324,761 — 324,761 — Total debt securities available for sale $ 5,122,568 $ 171,319 $ 4,951,249 $ — Loans held for sale $ 3,505 $ — $ 3,505 $ — Other assets: Interest rate lock commitments $ 90 $ — $ — $ 90 Interest rate contracts $ 24,063 $ — $ 24,063 $ — Liabilities Other liabilities: Interest rate forward loan sales contracts $ 20 $ — $ 20 $ — Interest rate contracts $ 24,063 $ — $ 24,063 $ — Fair Value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 December 31, 2021 (in thousands) Assets Debt securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 3,745,601 $ — $ 3,745,601 $ — Other asset-backed securities 463,063 — 463,063 — State and municipal securities 997,291 — 997,291 — U.S. government agency and government-sponsored enterprise securities 252,576 — 252,576 — U.S. government securities 157,536 157,536 — — Non-agency collateralized mortgage 294,932 — 294,932 — Total debt securities available for sale $ 5,910,999 $ 157,536 $ 5,753,463 $ — Loans held for sale $ 9,570 $ — $ 9,570 $ — Other assets: Interest rate lock commitments $ 356 $ — $ — $ 356 Interest rate contracts $ 24,257 $ — $ 24,257 $ — Liabilities Other liabilities: Interest rate forward loan sales contracts $ 27 $ — $ 27 $ — Interest rate contracts $ 24,257 $ — $ 24,257 $ — Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) The following table provides a description of the valuation technique, significant unobservable inputs and qualitative information about the unobservable inputs for the Company’s assets and liabilities classified as Level 3 and measured at fair value on a recurring basis at the dates presented: Fair Value at June 30, 2022 Valuation Technique Unobservable Input Range (Weighted Average) (dollars in thousands) Interest rate lock commitments $ 90 Internal pricing model Pull-through rate 75.10% - 100.00% (90.64%) Fair Value at June 30, 2021 Valuation Technique Unobservable Input Range (Weighted Average) (dollars in thousands) Interest rate lock commitments $ 585 Internal pricing model Pull-through rate 78.50% - 98.53% (88.89%) An increase in the pull-through rate utilized in the fair value measurement of the interest rate lock commitment derivative will result in positive fair value adjustments (and an increase in the fair value measurement). Conversely, a decrease in the pull-through rate will result in a negative fair value adjustment (and a decrease in the fair value measurement). The following table includes a rollforward of interest rate lock commitments which utilize Level 3 inputs to determine the fair value on a recurring basis. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Balance at the beginning of the period $ 36 $ 925 $ 356 $ 1,096 Change included in earnings 165 2,134 146 3,844 Settlements (111) (2,474) (412) (4,355) Balance at the end of the period $ 90 $ 585 $ 90 $ 585 Nonrecurring Measurements Certain assets and liabilities are measured at fair value on a nonrecurring basis after initial recognition such as collateral dependent loans. The following valuation techniques and inputs were used to estimate the fair value of collateral dependent loans. Collateral dependent loans - A collateral dependent loan is a loan in which repayment is expected to be provided solely by the underlying collateral. The fair market value of the collateral is determined by either the discounted expected future cash flows from the operation of the collateral or the appraised value of the collateral, less costs to sell. The collateral dependent loan valuations are performed in conjunction with the allowance for credit losses process on a quarterly basis. OREO - OREO is the real property of which the Bank has taken ownership in partial or full satisfaction of a loan or loans. OREO is generally measured based on the property’s fair market value as indicated by an appraisal or a letter of intent to purchase. OREO is initially recorded at the fair value less estimated costs to sell. This amount becomes the property’s new basis. Any fair value adjustments based on the property’s fair value less estimated costs to sell at the date of acquisition are charged to the allowance for credit losses, or in the event of a write-up without previous losses charged to the allowance for credit losses, a credit to earnings is recorded. Management periodically reviews OREO in an effort to ensure the property is recorded at its fair value, net of estimated costs to sell. Any fair value adjustments subsequent to acquisition are charged or credited to earnings. The Company had no assets measured using fair value estimates on a nonrecurring basis during the current quarterly period. For the six months ended June 30, 2022, the Company recorded a loss of $1.5 million on the nonrecurring measurement of collateral dependent loans. The following table sets forth information related to the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the prior year quarterly period: Fair Value at Fair Value Measurements Gains (Losses) During the Three Months Ended June 30, 2021 Gains (Losses) During the Six Months Ended June 30, 2021 June 30, 2021 Level 1 Level 2 Level 3 (in thousands) Collateral dependent loans $ 4,331 $ — $ — $ 4,331 $ (383) $ (383) OREO $ 375 $ — $ — $ 375 $ (140) $ (140) The gains (losses) on collateral dependent loans disclosed above represent the amount of the allowance or provision recapture for credit losses and/or charge-offs during the period applicable to loans held at period-end. The amount of the allowance is included in the ACL. The losses on OREO disclosed above represent the write-downs taken at foreclosure that were charged to the ACL as well as subsequent changes in valuation allowances from updated appraisals that were recorded to earnings. Quantitative information about Level 3 fair value measurements The range and weighted average of the significant unobservable inputs used to fair value our Level 3 nonrecurring assets, along with the valuation techniques used, are shown in the following table: Fair Value at June 30, 2021 Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Collateral dependent loans (2) $ 4,331 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 31.00% (3.67%) __________ (1) Discount applied to appraised value or stated value (in the case of accounts receivable and fixed assets). (2) Collateral consists of accounts receivable and fixed assets. The following tables summarize carrying amounts and estimated fair values of selected financial instruments by level within the fair value hierarchy at the dates presented: June 30, 2022 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 239,868 $ 239,868 $ 239,868 $ — $ — Interest-earning deposits with banks 174,328 174,328 174,328 — — Debt securities available for sale 5,122,568 5,122,568 171,319 4,951,249 — Debt securities held to maturity 2,149,255 1,912,526 — 1,912,526 — FHLB stock 10,280 10,280 — 10,280 — Loans held for sale 3,718 3,718 — 3,718 — Loans 11,172,452 11,060,539 — — 11,060,539 Interest rate contracts 24,063 24,063 — 24,063 — Interest rate lock commitments 90 90 — — 90 Liabilities Time deposits $ 400,553 $ 392,047 $ — $ 392,047 $ — FHLB advances 7,331 7,685 — 7,685 — Repurchase agreements 70,349 70,349 — 70,349 — Subordinated debentures 10,000 10,013 — 10,013 — Junior subordinated debentures 10,310 12,813 — 12,813 — Interest rate contracts 24,063 24,063 — 24,063 — Interest rate forward loan sales contracts 20 20 — 20 — December 31, 2021 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 153,414 $ 153,414 $ 153,414 $ — $ — Interest-earning deposits with banks 671,300 671,300 671,300 — — Debt securities available for sale 5,910,999 5,910,999 157,536 5,753,463 — Debt securities held to maturity 2,148,327 2,122,606 — 2,122,606 — FHLB stock 10,280 10,280 — 10,280 — Loans held for sale 9,774 9,774 — 9,774 — Loans 10,486,359 10,679,349 — — 10,679,349 Interest rate contracts 24,257 24,257 — 24,257 — Interest rate lock commitments 356 356 — — 356 Liabilities Time deposits $ 445,957 $ 430,682 $ — $ 430,682 $ — FHLB advances 7,359 8,752 — 8,752 — Repurchase agreements 86,013 86,013 — 86,013 — Subordinated debentures 10,000 10,125 — 10,125 — Junior subordinated debentures 10,310 9,927 — 9,927 — Interest rate contracts 24,257 24,257 — 24,257 — Interest rate forward loan sales contracts 27 27 — 27 — The following table presents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans held for sale sold under the mandatory delivery method and accounted for under the fair value option as of the dates presented: June 30, 2022 December 31, 2021 Fair Value Aggregate Unpaid Principal Balance Fair Value Less Aggregate Unpaid Principal Balance Fair Value Aggregate Unpaid Principal Balance Fair Value Less Aggregate Unpaid Principal Balance (in thousands) $ 3,505 $ 3,506 $ (1) $ 9,570 $ 9,401 $ 169 Residential mortgage loans held for sale that are sold under the mandatory delivery method and accounted for under the fair value option are measured initially at fair value with subsequent changes in fair value recognized in earnings. Gains and losses from such changes in fair value are reported in loan revenue. For the three months ended June 30, 2022, the Company recorded a net increase in fair value of $27 thousand representing the change in fair value reflected in earnings. For the six months ended June 30, 2022, the Company recorded a net decrease in fair value of $170 thousand, while the Company recorded net decreases in fair value of $57 thousand and $145 thousand, respectively, for the three and six months ended June 30, 2021. At June 30, 2022 and December 31, 2021, there were no residential mortgage loans held for sale for which the fair value option was elected that were 90 days or more past due, in nonaccrual status or both.

Earnings per Common Share

Earnings per Common Share	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common ShareThe Company applies the two-class method of computing basic and diluted EPS. Under the two-class method, EPS is determined for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. The Company has issued restricted shares under share-based compensation plans which qualify as participating securities. The following table sets forth the computation of basic and diluted EPS for the periods presented: Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (in thousands except per share amounts) Basic EPS: Net income $ 58,808 $ 55,039 $ 116,330 $ 106,892 Less: Earnings allocated to participating securities: Nonvested restricted shares — 70 47 227 Earnings allocated to common shareholders $ 58,808 $ 54,969 $ 116,283 $ 106,665 Weighted average common shares outstanding 78,049 70,987 77,989 70,924 Basic earnings per common share $ 0.75 $ 0.77 $ 1.49 $ 1.50 Diluted EPS: Earnings allocated to common shareholders $ 58,808 $ 54,969 $ 116,283 $ 106,665 Weighted average common shares outstanding 78,049 70,987 77,989 70,924 Dilutive effect of equity awards 65 177 110 155 Weighted average diluted common shares outstanding 78,114 71,164 78,099 71,079 Diluted earnings per common share $ 0.75 $ 0.77 $ 1.49 $ 1.50 Potentially dilutive RSAs and RSUs that were not included in the computation of diluted EPS because to do so would be anti-dilutive 600 248 389 158

Revenue from Contracts with Cus

Revenue from Contracts with Customers	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers The following table shows the disaggregation of revenue from contracts with customers for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Noninterest income: Revenue from contracts with customers: Deposit account and treasury management fees $ 8,212 $ 6,701 $ 15,325 $ 13,059 Card revenue 5,031 4,773 9,998 8,506 Financial services and trust revenue 4,192 4,245 8,824 7,626 Total revenue from contracts with customers 17,435 15,719 34,147 29,191 Other sources of noninterest income 7,571 7,011 15,039 16,705 Total noninterest income $ 25,006 $ 22,730 $ 49,186 $ 45,896

Business Combinations and Ass_2

Business Combinations and Asset Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Schedule of Recognized Assets Acquired and Liabilities Assumed [Table Text Block]	The table below summarizes the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed: October 1, 2021 (in thousands) Merger consideration $ 256,257 Identifiable net assets acquired, at fair value Assets acquired Cash and cash equivalents $ 155,180 Investment securities 654,480 FHLB stock 7,463 Loans, net allowance for credit loss 1,084,984 Interest receivable 5,237 Premises and equipment 17,658 Core deposit intangible 15,932 Other assets 41,963 Total assets acquired 1,982,897 Liabilities assumed Deposits (1,737,584) Subordinated debentures (10,000) Junior subordinated debentures (10,310) Other liabilities (26,076) Total liabilities assumed (1,783,970) Total fair value of identifiable net assets 198,927 Goodwill $ 57,330 See Note 8, “Goodwill and Other Intangible Assets,” for further discussion of the accounting for goodwill and other intangible assets.
Summary of PCD loans at acquisition [Table Text Block]	The following table provides a summary of these PCD loans at acquisition: October 1, 2021 (in thousands) Par value of PCD loans acquired $ 43,419 PCD ACL at acquisition (2,616) Non-credit discount on PCD loans (525) Purchase price of PCD loans $ 40,278
Business Acquisition, Pro Forma Information [Table Text Block]	For illustrative purposes only, the following table presents certain unaudited pro forma information for the six months ended June 30, 2021. This unaudited, estimated pro forma financial information was calculated as if Bank of Commerce had been acquired as of the beginning of the year prior to the date of acquisition. This unaudited pro forma information combines the historical results of Bank of Commerce with the Company’s consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the acquisition occurred as of the beginning of the year prior to the acquisition. The unaudited pro forma information does not consider any changes to the provision for credit losses resulting from recording loan assets at fair value. Additionally, the pro forma amounts below do not reflect Columbia’s expectations as of the date of the pro forma information of further operating cost savings and other business synergies expected to be achieved, including revenue growth as a result of the acquisition. As a result, actual amounts would have differed from the unaudited pro forma information presented. Unaudited Pro Forma for the Six Months Ended June 30, 2021 (in thousands, except per share amounts) Total revenues (net interest income plus noninterest income) $ 324,547 Net income $ 115,073 Earnings per share - basic $ 1.48 Earnings per share - diluted $ 1.48
Business acquisition, acquisition-related expenses [Table text block]	The following table shows the impact of the merger-related expenses related to the acquisition of Bank of Commerce for the periods indicated to the various components of noninterest expense: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Noninterest Expense Compensation and employee benefits $ 569 $ — $ 939 $ — Occupancy 101 — 920 — Data processing and software 381 — 1,421 — Legal and professional fees 153 510 245 510 Advertising and promotion — — 18 — Other 545 — 794 — Total impact of merger-related expenses to noninterest expense $ 1,749 $ 510 $ 4,337 $ 510

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Schedule of available-for-sale securities and held-to-maturity securities	The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of debt securities: Amortized Gross Gross Fair Value June 30, 2022 (in thousands) Available for sale U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 3,447,262 $ 1,016 $ (309,514) $ 3,138,764 Other asset-backed securities 419,448 — (39,480) 379,968 State and municipal securities 989,070 629 (111,371) 878,328 U.S. government agency and government-sponsored enterprise securities 240,375 58 (11,005) 229,428 U.S. government securities 182,681 — (11,362) 171,319 Non-agency collateralized mortgage obligations 368,687 — (43,926) 324,761 Total available for sale $ 5,647,523 $ 1,703 $ (526,658) $ 5,122,568 Held to maturity U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,149,255 $ — $ (236,729) $ 1,912,526 Total held to maturity $ 2,149,255 $ — $ (236,729) $ 1,912,526 December 31, 2021 Available for sale U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 3,738,616 $ 45,077 $ (38,092) $ 3,745,601 Other asset-backed securities 469,052 3,802 (9,791) 463,063 State and municipal securities 983,704 18,525 (4,938) 997,291 U.S. government agency and government-sponsored enterprise securities 252,755 3,095 (3,274) 252,576 U.S. government securities 158,367 — (831) 157,536 Non-agency collateralized mortgage obligations 295,547 340 (955) 294,932 Total available for sale $ 5,898,041 $ 70,839 $ (57,881) $ 5,910,999 Held to maturity U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,148,327 $ 50 $ (25,771) $ 2,122,606 Total held to maturity $ 2,148,327 $ 50 $ (25,771) $ 2,122,606
Schedule of gross realized gains and losses on sales and calls of securities available for sale	The following table provides the proceeds and both gross realized gains and losses on sales and calls of debt securities available for sale as well as other securities gains and losses for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Proceeds from sales of debt securities available for sale $ — $ 26,914 $ — $ 26,914 Gross realized gains from sales of debt securities available for sale $ — $ 751 $ — $ 751 Gross realized losses from sales of debt securities available for sale — (437) — (437) Investment securities gains, net $ — $ 314 $ — $ 314
Schedule Of Contractual Maturities	The scheduled contractual maturities of debt securities at the period presented below are as follows: June 30, 2022 Available for sale Held to maturity Amortized Cost Fair Value Amortized Cost Fair Value (in thousands) Due within one year $ 82,217 $ 82,117 $ — $ — Due after one year through five years 1,072,574 1,032,016 218,714 199,431 Due after five years through ten years 1,342,718 1,235,074 1,079,230 963,623 Due after ten years 3,150,014 2,773,361 851,311 749,472 Total debt securities $ 5,647,523 $ 5,122,568 $ 2,149,255 $ 1,912,526
Schedule of Securities pledged as collateral	The following table summarizes the carrying value of securities pledged as collateral to secure public funds, borrowings and other purposes as permitted or required by law: June 30, 2022 (in thousands) To secure public funds $ 558,331 To secure borrowings 91,525 Other securities pledged 235,258 Total securities pledged as collateral $ 885,114
Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses	The following table shows the gross unrealized losses and fair value of the Company’s debt securities available for sale for which an allowance for credit losses has not been recorded, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of the dates presented: Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized June 30, 2022 (in thousands) U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,595,623 $ (249,339) $ 390,944 $ (60,175) $ 2,986,567 $ (309,514) Other asset-backed securities 265,060 (23,946) 114,909 (15,534) 379,969 (39,480) State and municipal securities 708,006 (98,857) 73,417 (12,514) 781,423 (111,371) U.S. government agency and government-sponsored enterprise securities 87,960 (1,781) 117,326 (9,224) 205,286 (11,005) U.S. government securities 171,319 (11,362) — — 171,319 (11,362) Non-agency collateralized mortgage obligations 324,761 (43,926) — — 324,761 (43,926) Total $ 4,152,729 $ (429,211) $ 696,596 $ (97,447) $ 4,849,325 $ (526,658) December 31, 2021 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,292,062 $ (30,777) $ 176,946 $ (7,315) $ 2,469,008 $ (38,092) Other asset-backed securities 195,708 (4,823) 117,751 (4,968) 313,459 (9,791) State and municipal securities 237,354 (3,862) 40,343 (1,076) 277,697 (4,938) U.S. government agency and government-sponsored enterprise securities 100,813 (1,988) 48,714 (1,286) 149,527 (3,274) U.S. government securities 157,536 (831) — — 157,536 (831) Non-agency collateralized mortgage obligations 212,259 (955) — — 212,259 (955) Total $ 3,195,732 $ (43,236) $ 383,754 $ (14,645) $ 3,579,486 $ (57,881)

Loans (Tables)

Loans (Tables)	6 Months Ended
	Jun. 30, 2022
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Analysis of Loan Portfolio by Major Types of Loans	The Company’s loan portfolio includes originated and purchased loans. The following is an analysis of the loan portfolio by segment and class (net of unearned income): June 30, 2022 December 31, 2021 (dollars in thousands) Commercial loans: Commercial real estate $ 5,251,100 $ 4,981,263 Commercial business 3,646,956 3,423,268 Agriculture 853,099 795,715 Construction 482,211 384,755 Consumer loans: One-to-four family residential real estate 1,042,190 1,013,908 Other consumer 46,831 43,028 Total loans 11,322,387 10,641,937 Less: Allowance for credit losses (149,935) (155,578) Total loans, net $ 11,172,452 $ 10,486,359
Analysis of the Aged Loan Portfolio	The following is an aging of the recorded investment of the loan portfolio at the dates presented: Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans June 30, 2022 (in thousands) Commercial loans: Commercial real estate $ 5,244,961 $ 1,281 $ 2,183 $ — $ 3,464 $ 2,675 $ 5,251,100 Commercial business 3,621,858 14,910 241 — 15,151 9,947 3,646,956 Agriculture 849,483 400 — — 400 3,216 853,099 Construction 481,238 973 — — 973 — 482,211 Consumer loans: One-to-four family residential real estate 1,038,770 1,537 743 — 2,280 1,140 1,042,190 Other consumer 46,693 108 10 — 118 20 46,831 Total $ 11,283,003 $ 19,209 $ 3,177 $ — $ 22,386 $ 16,998 $ 11,322,387 Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans December 31, 2021 (in thousands) Commercial loans: Commercial real estate $ 4,977,781 $ — $ 1,610 $ — $ 1,610 $ 1,872 $ 4,981,263 Commercial business 3,406,539 2,721 687 — 3,408 13,321 3,423,268 Agriculture 789,112 1,207 — — 1,207 5,396 795,715 Construction 384,755 — — — — — 384,755 Consumer loans: One-to-four family residential real estate 1,010,343 921 211 — 1,132 2,433 1,013,908 Other consumer 42,998 11 — — 11 19 43,028 Total $ 10,611,528 $ 4,860 $ 2,508 $ — $ 7,368 $ 23,041 $ 10,641,937
Interest written off on nonaccrual loans	The following table summarizes written-off interest on nonaccrual loans for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Commercial loans $ 71 $ 212 $ 139 $ 424 Consumer loans 1 2 8 9 Total $ 72 $ 214 $ 147 $ 433
Analysis of Nonaccrual Loans	The following summarizes the amortized cost of nonaccrual loans for which there was no related ACL for the periods indicated: June 30, 2022 December 31, 2021 (in thousands) Commercial loans: Commercial real estate $ 1,760 $ 932 Commercial business 4,036 5,131 Agriculture 2,079 3,756 Consumer loans: One-to-four family residential real estate 751 — Total $ 8,626 $ 9,819
Analysis of loans classified as Troubled Debt Restructurings (“TDR”)	The following is an analysis of loans classified as TDR for the periods indicated: Three Months Ended June 30, 2022 Three Months Ended June 30, 2021 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial loans: Commercial business — — — 4 $ 1,757 $ 1,757 Total — $ — $ — 4 $ 1,757 $ 1,757 Six Months Ended June 30, 2022 Six Months Ended June 30, 2021 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial loans: Commercial real estate — $ — $ — 1 $ 628 $ 628 Commercial business — — — 11 2,600 2,600 Agriculture 1 633 633 — — — Consumer loans: One-to-four family residential real estate — — — 2 140 140 Total 1 $ 633 $ 633 14 $ 3,368 $ 3,368

Allowance for Credit Losses a_2

Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit (Tables)	6 Months Ended
	Jun. 30, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Credit Losses on Financing Receivables	The following tables show a detailed analysis of the ACL for the periods indicated: Beginning Balance Charge-offs Recoveries Provision Ending Balance Three Months Ended June 30, 2022 (in thousands) Commercial loans: Commercial real estate $ 57,307 $ (299) $ 147 $ (36) $ 57,119 Commercial business 50,474 (92) 797 806 51,985 Agriculture 8,010 (1) 24 862 8,895 Construction 5,399 — 136 379 5,914 Consumer loans: One-to-four family residential real estate 24,356 (3) 291 (18) 24,626 Other consumer 1,403 (241) 127 107 1,396 Total $ 146,949 $ (636) $ 1,522 $ 2,100 $ 149,935 Beginning Balance Charge-offs Recoveries Provision Ending Balance Six Months Ended June 30, 2022 Commercial loans: Commercial real estate $ 61,254 $ (299) $ 161 $ (3,997) $ 57,119 Commercial business 54,712 (1,724) 1,088 (2,091) 51,985 Agriculture 8,148 (24) 149 622 8,895 Construction 5,397 — 144 373 5,914 Consumer loans: One-to-four family residential real estate 24,123 (3) 585 (79) 24,626 Other consumer 1,944 (487) 467 (528) 1,396 Total $ 155,578 $ (2,537) $ 2,594 $ (5,700) $ 149,935 Beginning Balance Charge-offs Recoveries Provision Ending Balance Three Months Ended June 30, 2021 (in thousands) Commercial loans: Commercial real estate $ 57,050 $ (316) $ 16 $ (3,500) $ 53,250 Commercial business 58,405 (971) 874 (754) 57,554 Agriculture 9,487 (122) 5 (1,450) 7,920 Construction 6,551 — 521 (513) 6,559 Consumer loans: One-to-four family residential real estate 15,638 (146) 503 524 16,519 Other consumer 1,163 (385) 215 193 1,186 Total $ 148,294 $ (1,940) $ 2,134 $ (5,500) $ 142,988 Beginning Balance Charge-offs Recoveries Provision Ending Balance Six Months Ended June 30, 2021 Commercial loans: Commercial real estate $ 68,934 $ (316) $ 52 $ (15,420) $ 53,250 Commercial business 45,250 (4,310) 4,088 12,526 57,554 Agriculture 9,052 (122) 17 (1,027) 7,920 Construction 7,636 — 567 (1,644) 6,559 Consumer loans: One-to-four family residential real estate 16,875 (146) 554 (764) 16,519 Other consumer 1,393 (512) 276 29 1,186 Total $ 149,140 $ (5,406) $ 5,554 $ (6,300) $ 142,988
Changes in the Allowance for Unfunded Commitments and Letters of Credit	Changes in the allowance for unfunded commitments and letters of credit, a component of “Other liabilities” in the Consolidated Balance Sheets, are summarized as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Beginning balance $ 9,000 $ 9,800 $ 8,500 $ 8,300 Net changes in the allowance for unfunded commitments and letters of credit — 200 500 1,700 Ending balance $ 9,000 $ 10,000 $ 9,000 $ 10,000
Financing Receivable Credit Quality Indicators	The following is an analysis of the credit quality of our loan portfolio as of the periods indicated: Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Term Loans Amortized Cost Basis by Origination Year 2022 2021 2020 2019 2018 Prior Total June 30, 2022 (in thousands) Commercial loans: Commercial real estate Pass $ 705,896 $ 1,033,579 $ 709,061 $ 629,353 $ 450,830 $ 1,490,341 $ 54,099 $ 6,325 $ 5,079,484 Special mention — 1,882 1,373 30,655 1,424 26,442 — — 61,776 Substandard — 2,187 9,460 22,464 4,274 70,421 999 35 109,840 Total commercial real estate $ 705,896 $ 1,037,648 $ 719,894 $ 682,472 $ 456,528 $ 1,587,204 $ 55,098 $ 6,360 $ 5,251,100 Commercial business Pass $ 305,290 $ 742,045 $ 386,970 $ 239,935 $ 191,713 $ 306,756 $ 1,313,072 $ 5,325 $ 3,491,106 Special mention — 5,434 1,924 6,877 311 205 22,562 206 37,519 Substandard — 4,253 3,697 18,494 23,571 30,124 37,477 715 118,331 Total commercial business $ 305,290 $ 751,732 $ 392,591 $ 265,306 $ 215,595 $ 337,085 $ 1,373,111 $ 6,246 $ 3,646,956 Agriculture Pass $ 63,852 $ 134,066 $ 77,772 $ 75,835 $ 24,957 $ 108,954 $ 325,438 $ 666 $ 811,540 Special mention — 152 — 196 — — 618 — 966 Substandard — 1,524 6,621 548 1,134 2,753 28,013 — 40,593 Total agriculture $ 63,852 $ 135,742 $ 84,393 $ 76,579 $ 26,091 $ 111,707 $ 354,069 $ 666 $ 853,099 Construction Pass $ 106,490 $ 246,371 $ 40,102 $ 14,137 $ 2,702 $ 4,849 $ 64,558 $ — $ 479,209 Special mention — 761 — — 453 — — — 1,214 Substandard — — — 1,737 — 51 — — 1,788 Total construction $ 106,490 $ 247,132 $ 40,102 $ 15,874 $ 3,155 $ 4,900 $ 64,558 $ — $ 482,211 Consumer loans: One-to-four family residential real estate Pass $ 88,455 $ 368,446 $ 128,930 $ 44,689 $ 41,821 $ 102,116 $ 264,454 $ 429 $ 1,039,340 Substandard — 751 77 — 515 1,247 3 257 2,850 Total one-to-four family real estate $ 88,455 $ 369,197 $ 129,007 $ 44,689 $ 42,336 $ 103,363 $ 264,457 $ 686 $ 1,042,190 Other consumer Pass $ 3,931 $ 3,671 $ 1,934 $ 1,415 $ 1,899 $ 10,082 $ 23,855 $ 5 $ 46,792 Substandard — 25 — 3 — 11 — — 39 Total consumer $ 3,931 $ 3,696 $ 1,934 $ 1,418 $ 1,899 $ 10,093 $ 23,855 $ 5 $ 46,831 Total $ 1,273,914 $ 2,545,147 $ 1,367,921 $ 1,086,338 $ 745,604 $ 2,154,352 $ 2,135,148 $ 13,963 $ 11,322,387 Less: Allowance for credit losses 149,935 Loans, net $ 11,172,452 Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Term Loans Amortized Cost Basis by Origination Year 2021 2020 2019 2018 2017 Prior Total December 31, 2021 (in thousands) Commercial loans: Commercial real estate Pass $ 1,068,493 $ 760,545 $ 650,593 $ 492,348 $ 515,233 $ 1,180,115 $ 74,754 $ 3,644 $ 4,745,725 Special mention 2,252 — 19,016 6,196 163 27,270 — 2,199 57,096 Substandard 4,119 5,897 45,769 9,112 29,917 82,599 1,029 — 178,442 Total commercial real estate $ 1,074,864 $ 766,442 $ 715,378 $ 507,656 $ 545,313 $ 1,289,984 $ 75,783 $ 5,843 $ 4,981,263 Commercial business Pass $ 891,957 $ 426,004 $ 280,823 $ 217,605 $ 144,363 $ 232,356 $ 1,028,616 $ 35,411 $ 3,257,135 Special mention 621 135 6,097 747 105 51 34,256 236 42,248 Substandard 4,329 4,610 18,393 28,066 20,568 27,462 18,796 1,661 123,885 Total commercial business $ 896,907 $ 430,749 $ 305,313 $ 246,418 $ 165,036 $ 259,869 $ 1,081,668 $ 37,308 $ 3,423,268 Agriculture Pass $ 147,561 $ 87,964 $ 74,658 $ 29,739 $ 46,058 $ 79,693 $ 266,573 $ 5,448 $ 737,694 Special mention 162 — 445 — — — 565 — 1,172 Substandard — 7,717 9,148 1,616 5,532 1,833 29,125 1,878 56,849 Total agriculture $ 147,723 $ 95,681 $ 84,251 $ 31,355 $ 51,590 $ 81,526 $ 296,263 $ 7,326 $ 795,715 Construction Pass $ 228,661 $ 53,880 $ 35,795 $ 3,183 $ 3,285 $ 2,189 $ 55,765 $ — $ 382,758 Substandard — — 1,748 — — 249 — — 1,997 Total construction $ 228,661 $ 53,880 $ 37,543 $ 3,183 $ 3,285 $ 2,438 $ 55,765 $ — $ 384,755 Consumer loans: One-to-four family real estate Pass $ 390,153 $ 140,799 $ 56,520 $ 51,549 $ 32,447 $ 111,307 $ 222,747 $ 1,347 $ 1,006,869 Substandard 85 470 183 562 234 4,736 485 284 7,039 Total one-to-four family real estate $ 390,238 $ 141,269 $ 56,703 $ 52,111 $ 32,681 $ 116,043 $ 223,232 $ 1,631 $ 1,013,908 Other consumer Pass $ 7,045 $ 2,711 $ 1,950 $ 13,489 $ 560 $ 1,277 $ 15,853 $ 97 $ 42,982 Substandard — — — — 1 13 23 9 46 Total consumer $ 7,045 $ 2,711 $ 1,950 $ 13,489 $ 561 $ 1,290 $ 15,876 $ 106 $ 43,028 Total $ 2,745,438 $ 1,490,732 $ 1,201,138 $ 854,212 $ 798,466 $ 1,751,150 $ 1,748,587 $ 52,214 $ 10,641,937 Less: Allowance for credit losses 155,578 Loans, net $ 10,486,359

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	6 Months Ended
	Jun. 30, 2022
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Summary of Other Real Estate Owned	The following tables set forth activity in OREO for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Balance, beginning of period $ 381 $ 521 $ 381 $ 553 Valuation adjustments (149) (140) (149) (140) Proceeds from sale of OREO property (200) — (200) (132) Gain on sale of OREO, net 1 — 1 100 Balance, end of period $ 33 $ 381 $ 33 $ 381

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill and Intangible Assets	The following table sets forth activity for goodwill and other intangible assets for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Goodwill Total goodwill $ 823,172 $ 765,842 $ 823,172 $ 765,842 Other intangible assets, net CDI: Gross CDI balance at beginning of period (1) 88,931 105,473 88,931 105,473 Accumulated amortization at beginning of period (57,491) (81,582) (55,203) (79,658) CDI, net at beginning of period 31,440 23,891 33,728 25,815 CDI current period amortization (2,219) (1,852) (4,507) (3,776) Total CDI, net at end of period 29,221 22,039 29,221 22,039 Intangible assets not subject to amortization 919 919 919 919 Other intangible assets, net at end of period 30,140 22,958 30,140 22,958 Total goodwill and other intangible assets at end of period $ 853,312 $ 788,800 $ 853,312 $ 788,800 __________ (1) For the three and six months ended June 30, 2022 , the gross CDI balance, beginning of period excludes fully amortized amounts. Prior period columns has not been adjusted.
Estimated Future Amortization Expense of Core Deposit Intangibles	The following table provides the estimated future amortization expense of our CDI for the remaining six months ending December 31, 2022 and the succeeding four years: Total (in thousands) Remainder of 2022 $ 4,191 2023 7,082 2024 5,673 2025 4,366 2026 3,225

Derivatives and Balance Sheet_2

Derivatives and Balance Sheet Offsetting (Tables)	6 Months Ended
	Jun. 30, 2022
Derivative [Line Items]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table presents the fair value of derivatives, as well as their classification on the Consolidated Balance Sheet as of the dates presented: Asset Derivatives Liability Derivatives June 30, 2022 December 31, 2021 June 30, 2022 December 31, 2021 Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value (in thousands) Derivatives not designated as hedging instruments: Interest rate lock commitments Other assets $ 90 Other assets $ 356 Other liabilities $ — Other liabilities $ — Interest rate forward loan sales contracts Other assets $ — Other assets $ — Other liabilities $ 20 Other liabilities $ 27 Interest rate swap contracts Other assets $ 24,063 Other assets $ 24,257 Other liabilities $ 24,063 Other liabilities $ 24,257
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The table below presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) for the periods indicated: Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income Three Months Ended June 30, 2022 2021 (in thousands) Interest rate collar Interest income $ 2,603 $ 2,602 Six Months Ended June 30, 2022 2021 (in thousands) Interest rate collar Interest income $ 5,178 $ 5,178
Derivative Instruments, Gain (Loss)	The following table summarizes the types of derivatives not designated as hedging instruments and the gains (losses) recorded during the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Interest rate lock commitments $ 53 $ (340) $ (266) $ (511) Interest rate forward loan sales contracts (333) (527) 7 143 Interest rate swap contracts — (40) — 72 Total derivative gains (losses) $ (280) $ (907) $ (259) $ (296)
Balance Sheet Offsetting [Table Text Block]	The following tables show the gross interest rate swap contracts, collar agreements and repurchase agreements in the Consolidated Balance Sheets and the respective collateral received or pledged in the form of cash or other financial instruments. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of over-collateralization are not shown. Gross Amounts of Recognized Assets/Liabilities Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheets Collateral Pledged/Received Net Amount June 30, 2022 (in thousands) Assets Interest rate swap contracts $ 24,063 $ — $ 24,063 $ (24,063) $ — Liabilities Interest rate swap contracts $ 24,063 $ — $ 24,063 $ (180) $ 23,883 Repurchase agreements $ 70,349 $ — $ 70,349 $ (70,349) $ — December 31, 2021 Assets Interest rate swap contracts $ 24,257 $ — $ 24,257 $ (450) $ 23,807 Liabilities Interest rate swap contracts $ 24,257 $ — $ 24,257 $ (20,747) $ 3,510 Repurchase agreements $ 86,013 $ — $ 86,013 $ (86,013) $ —
Available-for-sale Securities [Member]
Derivative [Line Items]
Carrying Value of Securities Pledged As Collateral	The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements: Remaining contractual maturity of the agreements Overnight and continuous Up to 30 days 30 - 90 days Greater than 90 days Total June 30, 2022 (in thousands) Class of collateral pledged for repurchase agreements U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 70,349 $ — $ — $ — $ 70,349 Gross amount of recognized liabilities for repurchase agreements 70,349 Amounts related to agreements not included in offsetting disclosure $ —

Shareholders' Equity Dividends

Shareholders' Equity Dividends Declared (Tables)	6 Months Ended
	Jun. 30, 2022
Shareholders' Equity [Abstract]
Dividends Declared [Table Text Block]	The following table summarizes year-to-date dividend activity: Declared Regular Cash Dividends Per Common Share Record Date Paid Date January 19, 2022 $ 0.30 February 2, 2022 February 16, 2022 April 21, 2022 $ 0.30 May 4, 2022 May 18, 2022

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table shows changes in accumulated other comprehensive income (loss) by component for the periods indicated: Unrealized Gains and Losses on Available for Sale Securities (1) Unrealized Gains and Losses on Pension Plan Liability (1) Unrealized Gains and Losses on Hedging Instruments (1) Total (1) Three Months Ended June 30, 2022 (in thousands) Beginning balance $ (237,930) $ (4,711) $ 14,864 $ (227,777) Other comprehensive loss before reclassifications (152,860) — — (152,860) Amounts reclassified from accumulated other comprehensive loss (2) (2,080) 100 (1,998) (3,978) Net current-period other comprehensive income (loss) (154,940) 100 (1,998) (156,838) Ending balance $ (392,870) $ (4,611) $ 12,866 $ (384,615) Three Months Ended June 30, 2021 Beginning balance $ 60,569 $ (5,718) $ 22,877 $ 77,728 Other comprehensive income before reclassifications 21,850 — — 21,850 Amounts reclassified from accumulated other comprehensive income (2) (586) 115 (1,998) (2,469) Net current-period other comprehensive income (loss) 21,264 115 (1,998) 19,381 Ending balance $ 81,833 $ (5,603) $ 20,879 $ 97,109 Six Months Ended June 30, 2022 Beginning balance $ 23,134 $ (4,812) $ 16,840 $ 35,162 Other comprehensive loss before reclassifications (412,848) — — (412,848) Amounts reclassified from accumulated other comprehensive income (2) (3,156) 201 (3,974) (6,929) Net current-period other comprehensive income (loss) (416,004) 201 (3,974) (419,777) Ending balance $ (392,870) $ (4,611) $ 12,866 $ (384,615) Six Months Ended June 30, 2021 Beginning balance $ 163,174 $ (5,833) $ 24,854 $ 182,195 Other comprehensive loss before reclassifications (80,755) — — (80,755) Amounts reclassified from accumulated other comprehensive income (2) (586) 230 (3,975) (4,331) Net current-period other comprehensive income (loss) (81,341) 230 (3,975) (85,086) Ending balance $ 81,833 $ (5,603) $ 20,879 $ 97,109 __________ (1) All amounts are net of tax. Amounts in parentheses indicate debits. (2) See following table for details about these reclassifications.
Schedule of reclassifications from accumulated other comprehensive income [Table Text Block]	The following table shows details regarding the reclassifications from accumulated other comprehensive income (loss) for the periods indicated: Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended June 30, Six Months Ended June 30, Affected line Item in the Consolidated 2022 2021 2022 2021 Statement of Income (in thousands) Unrealized gains on available for sale debt securities $ — $ 314 $ — $ 314 Investment securities gains, net Amortization of unrealized gains related to securities transfer 2,710 450 4,112 450 Taxable securities 2,710 764 4,112 764 Total before tax (630) (178) (956) (178) Income tax provision $ 2,080 $ 586 $ 3,156 $ 586 Net of tax Amortization of pension plan liability actuarial losses $ (131) $ (149) $ (262) $ (299) Compensation and employee benefits (131) (149) (262) (299) Total before tax 31 34 61 69 Income tax provision $ (100) $ (115) $ (201) $ (230) Net of tax Unrealized gains from hedging instruments $ 2,603 $ 2,602 $ 5,178 $ 5,178 Loans 2,603 2,602 5,178 5,178 Total before tax (605) (604) (1,204) (1,203) Income tax provision $ 1,998 $ 1,998 $ 3,974 $ 3,975 Net of tax

Fair Value Accounting and Mea_2

Fair Value Accounting and Measurement (Tables)	6 Months Ended
	Jun. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables set forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at the dates presented by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement: Fair Value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 June 30, 2022 (in thousands) Assets Debt securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 3,138,764 $ — $ 3,138,764 $ — Other asset-backed securities 379,968 — 379,968 — State and municipal securities 878,328 — 878,328 — U.S. government agency and government-sponsored enterprise securities 229,428 — 229,428 — U.S. government securities 171,319 171,319 — Non-agency collateralized mortgage obligations 324,761 — 324,761 — Total debt securities available for sale $ 5,122,568 $ 171,319 $ 4,951,249 $ — Loans held for sale $ 3,505 $ — $ 3,505 $ — Other assets: Interest rate lock commitments $ 90 $ — $ — $ 90 Interest rate contracts $ 24,063 $ — $ 24,063 $ — Liabilities Other liabilities: Interest rate forward loan sales contracts $ 20 $ — $ 20 $ — Interest rate contracts $ 24,063 $ — $ 24,063 $ — Fair Value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 December 31, 2021 (in thousands) Assets Debt securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 3,745,601 $ — $ 3,745,601 $ — Other asset-backed securities 463,063 — 463,063 — State and municipal securities 997,291 — 997,291 — U.S. government agency and government-sponsored enterprise securities 252,576 — 252,576 — U.S. government securities 157,536 157,536 — — Non-agency collateralized mortgage 294,932 — 294,932 — Total debt securities available for sale $ 5,910,999 $ 157,536 $ 5,753,463 $ — Loans held for sale $ 9,570 $ — $ 9,570 $ — Other assets: Interest rate lock commitments $ 356 $ — $ — $ 356 Interest rate contracts $ 24,257 $ — $ 24,257 $ — Liabilities Other liabilities: Interest rate forward loan sales contracts $ 27 $ — $ 27 $ — Interest rate contracts $ 24,257 $ — $ 24,257 $ —
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The following table includes a rollforward of interest rate lock commitments which utilize Level 3 inputs to determine the fair value on a recurring basis. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Balance at the beginning of the period $ 36 $ 925 $ 356 $ 1,096 Change included in earnings 165 2,134 146 3,844 Settlements (111) (2,474) (412) (4,355) Balance at the end of the period $ 90 $ 585 $ 90 $ 585
Financial Assets Accounted For Fair Value On Nonrecurring Basis	The following table sets forth information related to the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the prior year quarterly period: Fair Value at Fair Value Measurements Gains (Losses) During the Three Months Ended June 30, 2021 Gains (Losses) During the Six Months Ended June 30, 2021 June 30, 2021 Level 1 Level 2 Level 3 (in thousands) Collateral dependent loans $ 4,331 $ — $ — $ 4,331 $ (383) $ (383) OREO $ 375 $ — $ — $ 375 $ (140) $ (140)
Fair Value, by Balance Sheet Grouping	The following tables summarize carrying amounts and estimated fair values of selected financial instruments by level within the fair value hierarchy at the dates presented: June 30, 2022 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 239,868 $ 239,868 $ 239,868 $ — $ — Interest-earning deposits with banks 174,328 174,328 174,328 — — Debt securities available for sale 5,122,568 5,122,568 171,319 4,951,249 — Debt securities held to maturity 2,149,255 1,912,526 — 1,912,526 — FHLB stock 10,280 10,280 — 10,280 — Loans held for sale 3,718 3,718 — 3,718 — Loans 11,172,452 11,060,539 — — 11,060,539 Interest rate contracts 24,063 24,063 — 24,063 — Interest rate lock commitments 90 90 — — 90 Liabilities Time deposits $ 400,553 $ 392,047 $ — $ 392,047 $ — FHLB advances 7,331 7,685 — 7,685 — Repurchase agreements 70,349 70,349 — 70,349 — Subordinated debentures 10,000 10,013 — 10,013 — Junior subordinated debentures 10,310 12,813 — 12,813 — Interest rate contracts 24,063 24,063 — 24,063 — Interest rate forward loan sales contracts 20 20 — 20 — December 31, 2021 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 153,414 $ 153,414 $ 153,414 $ — $ — Interest-earning deposits with banks 671,300 671,300 671,300 — — Debt securities available for sale 5,910,999 5,910,999 157,536 5,753,463 — Debt securities held to maturity 2,148,327 2,122,606 — 2,122,606 — FHLB stock 10,280 10,280 — 10,280 — Loans held for sale 9,774 9,774 — 9,774 — Loans 10,486,359 10,679,349 — — 10,679,349 Interest rate contracts 24,257 24,257 — 24,257 — Interest rate lock commitments 356 356 — — 356 Liabilities Time deposits $ 445,957 $ 430,682 $ — $ 430,682 $ — FHLB advances 7,359 8,752 — 8,752 — Repurchase agreements 86,013 86,013 — 86,013 — Subordinated debentures 10,000 10,125 — 10,125 — Junior subordinated debentures 10,310 9,927 — 9,927 — Interest rate contracts 24,257 24,257 — 24,257 — Interest rate forward loan sales contracts 27 27 — 27 —
Fair Value Option, Disclosures	The following table presents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans held for sale sold under the mandatory delivery method and accounted for under the fair value option as of the dates presented: June 30, 2022 December 31, 2021 Fair Value Aggregate Unpaid Principal Balance Fair Value Less Aggregate Unpaid Principal Balance Fair Value Aggregate Unpaid Principal Balance Fair Value Less Aggregate Unpaid Principal Balance (in thousands) $ 3,505 $ 3,506 $ (1) $ 9,570 $ 9,401 $ 169
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Assets, Quantitative Information	The range and weighted average of the significant unobservable inputs used to fair value our Level 3 nonrecurring assets, along with the valuation techniques used, are shown in the following table: Fair Value at June 30, 2021 Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Collateral dependent loans (2) $ 4,331 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 31.00% (3.67%) __________ (1) Discount applied to appraised value or stated value (in the case of accounts receivable and fixed assets). (2) Collateral consists of accounts receivable and fixed assets.
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Assets And Liabilities Measured On Recurring Basis ValuationTechniques	The following table provides a description of the valuation technique, significant unobservable inputs and qualitative information about the unobservable inputs for the Company’s assets and liabilities classified as Level 3 and measured at fair value on a recurring basis at the dates presented: Fair Value at June 30, 2022 Valuation Technique Unobservable Input Range (Weighted Average) (dollars in thousands) Interest rate lock commitments $ 90 Internal pricing model Pull-through rate 75.10% - 100.00% (90.64%) Fair Value at June 30, 2021 Valuation Technique Unobservable Input Range (Weighted Average) (dollars in thousands) Interest rate lock commitments $ 585 Internal pricing model Pull-through rate 78.50% - 98.53% (88.89%)

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted EPS for the periods presented: Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (in thousands except per share amounts) Basic EPS: Net income $ 58,808 $ 55,039 $ 116,330 $ 106,892 Less: Earnings allocated to participating securities: Nonvested restricted shares — 70 47 227 Earnings allocated to common shareholders $ 58,808 $ 54,969 $ 116,283 $ 106,665 Weighted average common shares outstanding 78,049 70,987 77,989 70,924 Basic earnings per common share $ 0.75 $ 0.77 $ 1.49 $ 1.50 Diluted EPS: Earnings allocated to common shareholders $ 58,808 $ 54,969 $ 116,283 $ 106,665 Weighted average common shares outstanding 78,049 70,987 77,989 70,924 Dilutive effect of equity awards 65 177 110 155 Weighted average diluted common shares outstanding 78,114 71,164 78,099 71,079 Diluted earnings per common share $ 0.75 $ 0.77 $ 1.49 $ 1.50 Potentially dilutive RSAs and RSUs that were not included in the computation of diluted EPS because to do so would be anti-dilutive 600 248 389 158

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table shows the disaggregation of revenue from contracts with customers for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (in thousands) Noninterest income: Revenue from contracts with customers: Deposit account and treasury management fees $ 8,212 $ 6,701 $ 15,325 $ 13,059 Card revenue 5,031 4,773 9,998 8,506 Financial services and trust revenue 4,192 4,245 8,824 7,626 Total revenue from contracts with customers 17,435 15,719 34,147 29,191 Other sources of noninterest income 7,571 7,011 15,039 16,705 Total noninterest income $ 25,006 $ 22,730 $ 49,186 $ 45,896

Business Combinations and Ass_3

Business Combinations and Asset Acquisitions - Assets acquired and liabilities assumed (Details) - Bank of Commerce $ in Thousands	Oct. 01, 2021 USD ($)
Asset Acquisition [Line Items]
Merger consideration	$ 256,257
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	155,180
Business Acquisition, Purchase Price Allocation, Current Assets, Investment Securities	654,480
Business Acquisition, Purchase Price Allocation, FHLB Stock	7,463
Business Combination, Acquired Loans, net of allowance for credit loss	1,084,984
Business Acquisition, Purchase Price Allocation, Accrued Interest Receivable	5,237
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	17,658
Business Combination, Purchase Price Allocation, Core Deposit Intangible	15,932
Business Combination, Purchase Price Allocation, Other Assets	41,963
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	1,982,897
Business Acquisition, Purchase Price Allocation, Liabilities, Deposits	1,737,584
Business Combination, Purchase Price Allocation, Subordinated Debt	10,000
Business Combination, Purchase Price Allocation, Junior Subordinated Debentures	10,310
Business Combination, Purchase Price Allocation, Other Liabilities	26,076
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	1,783,970
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	198,927
Business Combination, Purchase Price Allocation, Goodwill Amount	$ 57,330

Business Combinations and Ass_4

Business Combinations and Asset Acquisitions - PCD (Details) - Bank of Commerce $ in Thousands	Oct. 01, 2021 USD ($)
Business Acquisition [Line Items]
Par Value of PCD loans acquired	$ 43,419
PCD ACL at acquisition	(2,616)
Non-credit discount on PCD loans	(525)
Purchase price of PCD loans	$ 40,278

Business Combinations and Ass_5

Business Combinations and Asset Acquisitions - Proforma (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($) $ / shares
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue | $	$ 324,547
Business Acquisition, Pro Forma Net Income | $	$ 115,073
Business Acquisition, Pro Forma Earnings Per Share, Basic | $ / shares	$ 1.48
Business Acquisition, Pro Forma Earnings Per Share, Diluted | $ / shares	$ 1.48

Business Combinations and Ass_6

Business Combinations and Asset Acquisitions - acquisition-related expenses (Details) - Bank of Commerce - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Asset Acquisition [Line Items]
Business Combination, Acquisition Related Costs	$ 1,749	$ 510	$ 4,337	$ 510
Compensation and employee benefits
Asset Acquisition [Line Items]
Business Combination, Acquisition Related Costs	569	0	939	0
Occupancy
Asset Acquisition [Line Items]
Business Combination, Acquisition Related Costs	101	0	920	0
Data processing and software
Asset Acquisition [Line Items]
Business Combination, Acquisition Related Costs	381	0	1,421	0
Legal and professional fees
Asset Acquisition [Line Items]
Business Combination, Acquisition Related Costs	153	510	245	510
Advertising and promotion
Asset Acquisition [Line Items]
Business Combination, Acquisition Related Costs	0	0	18	0
Other noninterest expenses
Asset Acquisition [Line Items]
Business Combination, Acquisition Related Costs	$ 545	$ 0	$ 794	$ 0

Business Combinations and Ass_7

Business Combinations and Asset Acquisitions - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Oct. 01, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Bank of Commerce
Business Acquisition [Line Items]
Business Combination, Purchase Price Allocation, Goodwill Amount	$ 57,330
Business Combination, Purchase Price Allocation, Amortizable Intangible Assets	15,932
Business Combination, net loans acquired	1,084,984
Acquired PCD loans	$ 40,278
Business Combination, Acquisition Related Costs		$ 1,749	$ 510	$ 4,337	$ 510
Umpqua
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs		$ 2,200		$ 6,600

Securities (Debt securities) (D

Securities (Debt securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, [Line Items]
Debt securities available-for-sale, amortized cost	$ 5,647,523	$ 5,898,041
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,703	70,839
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(526,658)	(57,881)
Debt securities available for sale at fair value	5,122,568	5,910,999
Debt Securities, Held-to-Maturity, Amortized Cost	2,149,255	2,148,327
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0	50
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	236,729	25,771
Debt Securities, Held-to-maturity, Fair Value	1,912,526	2,122,606
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Debt Securities, [Line Items]
Debt securities available-for-sale, amortized cost	3,447,262	3,738,616
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,016	45,077
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(309,514)	(38,092)
Debt securities available for sale at fair value	3,138,764	3,745,601
Debt Securities, Held-to-Maturity, Amortized Cost	2,149,255	2,148,327
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0	50
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	236,729	25,771
Debt Securities, Held-to-maturity, Fair Value	1,912,526	2,122,606
Asset-backed Securities [Member]
Debt Securities, [Line Items]
Debt securities available-for-sale, amortized cost	419,448	469,052
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	3,802
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(39,480)	(9,791)
Debt securities available for sale at fair value	379,968	463,063
State and Municipal Securities [Member]
Debt Securities, [Line Items]
Debt securities available-for-sale, amortized cost	989,070	983,704
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	629	18,525
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(111,371)	(4,938)
Debt securities available for sale at fair value	878,328	997,291
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Debt Securities, [Line Items]
Debt securities available-for-sale, amortized cost	240,375	252,755
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	58	3,095
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(11,005)	(3,274)
Debt securities available for sale at fair value	229,428	252,576
US Treasury Securities [Member]
Debt Securities, [Line Items]
Debt securities available-for-sale, amortized cost	182,681	158,367
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(11,362)	(831)
Debt securities available for sale at fair value	171,319	157,536
Non-agency collateralized mortgage obligations [Member]
Debt Securities, [Line Items]
Debt securities available-for-sale, amortized cost	368,687	295,547
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	340
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(43,926)	(955)
Debt securities available for sale at fair value	$ 324,761	$ 294,932

Securities - Summary of Gross R

Securities - Summary of Gross Realized Gains and Gross Realized losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Proceeds from Sale of Debt Securities, Available-for-sale	$ 0	$ 26,914	$ 0	$ 26,914
Debt Securities, Available-for-sale, Realized Gain	0	751	0	751
Debt Securities, Available-for-sale, Realized Loss	0	437	0	437
Investment securities gain (loss), net	$ 0	$ 314	$ 0	$ 314

Securities (Schedule of Contrac

Securities (Schedule of Contractual Maturities of Investment Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One	$ 82,217
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five	1,072,574
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	1,342,718
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10	3,150,014
Debt securities available-for-sale, amortized cost	5,647,523	$ 5,898,041
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One	82,117
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	1,032,016
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	1,235,074
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10	2,773,361
Debt securities available for sale at fair value	5,122,568	5,910,999
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One	0
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five	218,714
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year Five through Ten	1,079,230
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10	851,311
Debt Securities, Held-to-Maturity, Amortized Cost	2,149,255	2,148,327
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value	0
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	199,431
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	963,623
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10	749,472
Debt Securities, Held-to-maturity, Fair Value	$ 1,912,526	$ 2,122,606

Securities (Carrying Value of S

Securities (Carrying Value of Securities Pledged as Collateral) (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 885,114
To secure public funds
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	558,331
To secure borrowings
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	91,525
Other securities pledged
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 235,258

Securities (Summary of Gross Un

Securities (Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 4,152,729	$ 3,195,732
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	429,211	43,236
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	696,596	383,754
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	97,447	14,645
Debt Securities, Available-for-sale, Unrealized Loss Position	4,849,325	3,579,486
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	526,658	57,881
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	2,595,623	2,292,062
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	249,339	30,777
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	390,944	176,946
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	60,175	7,315
Debt Securities, Available-for-sale, Unrealized Loss Position	2,986,567	2,469,008
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	309,514	38,092
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	265,060	195,708
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	23,946	4,823
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	114,909	117,751
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	15,534	4,968
Debt Securities, Available-for-sale, Unrealized Loss Position	379,969	313,459
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	39,480	9,791
State and Municipal Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	708,006	237,354
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	98,857	3,862
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	73,417	40,343
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	12,514	1,076
Debt Securities, Available-for-sale, Unrealized Loss Position	781,423	277,697
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	111,371	4,938
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	87,960	100,813
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,781	1,988
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	117,326	48,714
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	9,224	1,286
Debt Securities, Available-for-sale, Unrealized Loss Position	205,286	149,527
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	11,005	3,274
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	171,319	157,536
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	11,362	831
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	171,319	157,536
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	11,362	831
Non-agency collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	324,761	212,259
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	43,926	955
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	324,761	212,259
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 43,926	$ 955

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) security	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) security	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity, Allowance for Credit Loss | $	$ 0		$ 0		$ 0
Debt Securities, Available-for-sale, Allowance for Credit Loss | $	0		0		0
Interest receivable | $	57,155		57,155		56,019
Gain (loss) on equity securities, net | $	0	$ 0	0	$ 0
Available-for-sale Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Interest receivable | $	18,500		18,500		19,200
Held-to-maturity Securities
Debt Securities, Available-for-sale [Line Items]
Interest receivable | $	$ 4,400		$ 4,400		$ 4,400
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	643		643
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	83		83
State and Municipal Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	520		520
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	20		20
Non-agency collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	56		56
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	10		10

Loans (Analysis of Loan Portfol

Loans (Analysis of Loan Portfolio by Major Types of Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 11,322,387		$ 10,641,937
Financing Receivable, Allowance for Credit Loss	(149,935)	$ (146,949)	(155,578)	$ (142,988)	$ (148,294)	$ (149,140)
Loans and Leases Receivable, Net Amount	11,172,452		10,486,359
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,251,100		4,981,263
Financing Receivable, Allowance for Credit Loss	(57,119)	(57,307)	(61,254)	(53,250)	(57,050)	(68,934)
Commercial Business [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,646,956		3,423,268
Financing Receivable, Allowance for Credit Loss	(51,985)	(50,474)	(54,712)	(57,554)	(58,405)	(45,250)
Agriculture [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	853,099		795,715
Financing Receivable, Allowance for Credit Loss	(8,895)	(8,010)	(8,148)	(7,920)	(9,487)	(9,052)
Construction [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	482,211		384,755
Financing Receivable, Allowance for Credit Loss	(5,914)	(5,399)	(5,397)	(6,559)	(6,551)	(7,636)
One-to-Four Family Residential [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,042,190		1,013,908
Financing Receivable, Allowance for Credit Loss	(24,626)	(24,356)	(24,123)	(16,519)	(15,638)	(16,875)
Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	46,831		43,028
Financing Receivable, Allowance for Credit Loss	$ (1,396)	$ (1,403)	$ (1,944)	$ (1,186)	$ (1,163)	$ (1,393)

Loans (Analysis of the Aged Loa

Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 16,998	$ 23,041
Total Loans	11,322,387	10,641,937
Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	2,675	1,872
Total Loans	5,251,100	4,981,263
Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	9,947	13,321
Total Loans	3,646,956	3,423,268
Agriculture [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	3,216	5,396
Total Loans	853,099	795,715
Construction [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	0	0
Total Loans	482,211	384,755
One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	1,140	2,433
Total Loans	1,042,190	1,013,908
Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	20	19
Total Loans	46,831	43,028
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	11,283,003	10,611,528
Financial Asset, Not Past Due | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	5,244,961	4,977,781
Financial Asset, Not Past Due | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	3,621,858	3,406,539
Financial Asset, Not Past Due | Agriculture [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	849,483	789,112
Financial Asset, Not Past Due | Construction [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	481,238	384,755
Financial Asset, Not Past Due | One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	1,038,770	1,010,343
Financial Asset, Not Past Due | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	46,693	42,998
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	19,209	4,860
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	1,281	0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	14,910	2,721
Financial Asset, 30 to 59 Days Past Due [Member] | Agriculture [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	400	1,207
Financial Asset, 30 to 59 Days Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	973	0
Financial Asset, 30 to 59 Days Past Due [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	1,537	921
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	108	11
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	3,177	2,508
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	2,183	1,610
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	241	687
Financial Asset, 60 to 89 Days Past Due [Member] | Agriculture [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	743	211
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	10	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Agriculture [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	22,386	7,368
Financial Asset, Past Due | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	3,464	1,610
Financial Asset, Past Due | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	15,151	3,408
Financial Asset, Past Due | Agriculture [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	400	1,207
Financial Asset, Past Due | Construction [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	973	0
Financial Asset, Past Due | One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	2,280	1,132
Financial Asset, Past Due | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	$ 118	$ 11

Loans (Interest written off on

Loans (Interest written off on nonaccual loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Credit Quality Indicator - nonaccrual loans written off interest [Line Items]
Financing Receivable Accrued Interest Reversed Through Interest Income	$ 72	$ 214	$ 147	$ 433
Commercial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator - nonaccrual loans written off interest [Line Items]
Financing Receivable Accrued Interest Reversed Through Interest Income	71	212	139	424
Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator - nonaccrual loans written off interest [Line Items]
Financing Receivable Accrued Interest Reversed Through Interest Income	$ 1	$ 2	$ 8	$ 9

Loans (Analysis of Nonaccrual L

Loans (Analysis of Nonaccrual Loans with no ACL) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	$ 8,626	$ 9,819
Commercial Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	1,760	932
Commercial Business [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	4,036	5,131
Agriculture [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	2,079	3,756
One-to-Four Family Residential [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	$ 751	$ 0

Loans Loans (Analysis of Troubl

Loans Loans (Analysis of Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) Modifications	Jun. 30, 2021 USD ($) Modifications	Jun. 30, 2022 USD ($) Modifications	Jun. 30, 2021 USD ($) Modifications
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	0	4	1	14
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 0	$ 1,757	$ 633	$ 3,368
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 1,757	$ 633	$ 3,368
Commercial Real Estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications			0	1
Financing Receivable, Troubled Debt Restructuring, Premodification			$ 0	$ 628
Financing Receivable, Troubled Debt Restructuring, Postmodification			$ 0	$ 628
Commercial Business [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	0	4	0	11
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 0	$ 1,757	$ 0	$ 2,600
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 1,757	$ 0	$ 2,600
Agriculture [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications			1	0
Financing Receivable, Troubled Debt Restructuring, Premodification			$ 633	$ 0
Financing Receivable, Troubled Debt Restructuring, Postmodification			$ 633	$ 0
One-to-Four Family Residential [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications			0	2
Financing Receivable, Troubled Debt Restructuring, Premodification			$ 0	$ 140
Financing Receivable, Troubled Debt Restructuring, Postmodification			$ 0	$ 140

Loans (Narrative) (Details)

Loans (Narrative) (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2022 USD ($) contract	Jun. 30, 2021 contract	Dec. 31, 2021 USD ($)
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Interest Receivable, loans	$ 57,155		$ 56,019
Financing Receivable Modifications Additional Commitment To Lend	$ 299		1,500
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract	0	0
Loans Receivable [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 4,240,000		3,490,000
Commercial Loan [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans pledged to collateralize Federal Reserve Bank Borrowings	200,300		200,500
Loans [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Interest Receivable, loans	$ 34,300		$ 32,400

Allowance for Credit Losses a_3

Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit (Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	$ 149,935	$ 142,988	$ 149,935	$ 142,988	$ 146,949	$ 155,578	$ 148,294	$ 149,140
Financing Receivable, Allowance for Credit Loss, Writeoff	(636)	(1,940)	(2,537)	(5,406)
Financing Receivable, Allowance for Credit Loss, Recovery	1,522	2,134	2,594	5,554
Provision (recapture) for credit losses	2,100	(5,500)	(5,700)	(6,300)
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	57,119	53,250	57,119	53,250	57,307	61,254	57,050	68,934
Financing Receivable, Allowance for Credit Loss, Writeoff	(299)	(316)	(299)	(316)
Financing Receivable, Allowance for Credit Loss, Recovery	147	16	161	52
Provision (recapture) for credit losses	(36)	(3,500)	(3,997)	(15,420)
Commercial Business [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	51,985	57,554	51,985	57,554	50,474	54,712	58,405	45,250
Financing Receivable, Allowance for Credit Loss, Writeoff	(92)	(971)	(1,724)	(4,310)
Financing Receivable, Allowance for Credit Loss, Recovery	797	874	1,088	4,088
Provision (recapture) for credit losses	806	(754)	(2,091)	12,526
Agriculture [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	8,895	7,920	8,895	7,920	8,010	8,148	9,487	9,052
Financing Receivable, Allowance for Credit Loss, Writeoff	(1)	(122)	(24)	(122)
Financing Receivable, Allowance for Credit Loss, Recovery	24	5	149	17
Provision (recapture) for credit losses	862	(1,450)	622	(1,027)
Construction [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	5,914	6,559	5,914	6,559	5,399	5,397	6,551	7,636
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	136	521	144	567
Provision (recapture) for credit losses	379	(513)	373	(1,644)
One-to-Four Family Residential [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	24,626	16,519	24,626	16,519	24,356	24,123	15,638	16,875
Financing Receivable, Allowance for Credit Loss, Writeoff	(3)	(146)	(3)	(146)
Financing Receivable, Allowance for Credit Loss, Recovery	291	503	585	554
Provision (recapture) for credit losses	(18)	524	(79)	(764)
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	1,396	1,186	1,396	1,186	$ 1,403	$ 1,944	$ 1,163	$ 1,393
Financing Receivable, Allowance for Credit Loss, Writeoff	(241)	(385)	(487)	(512)
Financing Receivable, Allowance for Credit Loss, Recovery	127	215	467	276
Provision (recapture) for credit losses	$ 107	$ 193	$ (528)	$ 29

Allowance for Credit Losses a_4

Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit (Changes in the Allowance for Unfunded Commitments and Letters of Credit) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Schedule of Allowance for Unfunded Commitments and Letters of Credit [Line Items]
Allowance For Unfunded Loan Commitments And Letters Of Credit	$ 9,000	$ 10,000	$ 9,000	$ 10,000	$ 9,000	$ 8,500	$ 9,800	$ 8,300
Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance	$ 0	$ 200	$ 500	$ 1,700

Allowance for Credit Losses a_5

Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit (Analysis of Credit Quality of the Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 1,273,914		$ 2,745,438
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,545,147		1,490,732
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,367,921		1,201,138
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,086,338		854,212
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	745,604		798,466
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,154,352		1,751,150
Financing Receivable, Revolving	2,135,148		1,748,587
Financing Receivable, Revolving Converted to Term Loans	13,963		52,214
Loans and Leases Receivable, Net of Deferred Income	11,322,387		10,641,937
Financing Receivable, Allowance for Credit Loss	149,935	$ 146,949	155,578	$ 142,988	$ 148,294	$ 149,140
Loans, net	11,172,452		10,486,359
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	705,896		1,074,864
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,037,648		766,442
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	719,894		715,378
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	682,472		507,656
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	456,528		545,313
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,587,204		1,289,984
Financing Receivable, Revolving	55,098		75,783
Financing Receivable, Revolving Converted to Term Loans	6,360		5,843
Loans and Leases Receivable, Net of Deferred Income	5,251,100		4,981,263
Financing Receivable, Allowance for Credit Loss	57,119	57,307	61,254	53,250	57,050	68,934
Commercial Real Estate [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	705,896		1,068,493
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,033,579		760,545
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	709,061		650,593
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	629,353		492,348
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	450,830		515,233
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,490,341		1,180,115
Financing Receivable, Revolving	54,099		74,754
Financing Receivable, Revolving Converted to Term Loans	6,325		3,644
Loans and Leases Receivable, Net of Deferred Income	5,079,484		4,745,725
Commercial Real Estate [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		2,252
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,882		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,373		19,016
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	30,655		6,196
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,424		163
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	26,442		27,270
Financing Receivable, Revolving	0		0
Financing Receivable, Revolving Converted to Term Loans	0		2,199
Loans and Leases Receivable, Net of Deferred Income	61,776		57,096
Commercial Real Estate [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		4,119
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,187		5,897
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	9,460		45,769
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	22,464		9,112
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	4,274		29,917
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	70,421		82,599
Financing Receivable, Revolving	999		1,029
Financing Receivable, Revolving Converted to Term Loans	35		0
Loans and Leases Receivable, Net of Deferred Income	109,840		178,442
Commercial Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	305,290		896,907
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	751,732		430,749
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	392,591		305,313
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	265,306		246,418
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	215,595		165,036
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	337,085		259,869
Financing Receivable, Revolving	1,373,111		1,081,668
Financing Receivable, Revolving Converted to Term Loans	6,246		37,308
Loans and Leases Receivable, Net of Deferred Income	3,646,956		3,423,268
Financing Receivable, Allowance for Credit Loss	51,985	50,474	54,712	57,554	58,405	45,250
Commercial Business [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	305,290		891,957
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	742,045		426,004
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	386,970		280,823
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	239,935		217,605
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	191,713		144,363
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	306,756		232,356
Financing Receivable, Revolving	1,313,072		1,028,616
Financing Receivable, Revolving Converted to Term Loans	5,325		35,411
Loans and Leases Receivable, Net of Deferred Income	3,491,106		3,257,135
Commercial Business [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		621
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	5,434		135
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,924		6,097
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	6,877		747
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	311		105
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	205		51
Financing Receivable, Revolving	22,562		34,256
Financing Receivable, Revolving Converted to Term Loans	206		236
Loans and Leases Receivable, Net of Deferred Income	37,519		42,248
Commercial Business [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		4,329
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	4,253		4,610
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	3,697		18,393
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	18,494		28,066
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	23,571		20,568
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	30,124		27,462
Financing Receivable, Revolving	37,477		18,796
Financing Receivable, Revolving Converted to Term Loans	715		1,661
Loans and Leases Receivable, Net of Deferred Income	118,331		123,885
Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	63,852		147,723
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	135,742		95,681
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	84,393		84,251
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	76,579		31,355
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	26,091		51,590
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	111,707		81,526
Financing Receivable, Revolving	354,069		296,263
Financing Receivable, Revolving Converted to Term Loans	666		7,326
Loans and Leases Receivable, Net of Deferred Income	853,099		795,715
Financing Receivable, Allowance for Credit Loss	8,895	8,010	8,148	7,920	9,487	9,052
Agriculture [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	63,852		147,561
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	134,066		87,964
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	77,772		74,658
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	75,835		29,739
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	24,957		46,058
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	108,954		79,693
Financing Receivable, Revolving	325,438		266,573
Financing Receivable, Revolving Converted to Term Loans	666		5,448
Loans and Leases Receivable, Net of Deferred Income	811,540		737,694
Agriculture [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		162
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	152		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		445
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	196		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0		0
Financing Receivable, Revolving	618		565
Financing Receivable, Revolving Converted to Term Loans	0		0
Loans and Leases Receivable, Net of Deferred Income	966		1,172
Agriculture [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,524		7,717
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	6,621		9,148
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	548		1,616
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,134		5,532
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,753		1,833
Financing Receivable, Revolving	28,013		29,125
Financing Receivable, Revolving Converted to Term Loans	0		1,878
Loans and Leases Receivable, Net of Deferred Income	40,593		56,849
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	106,490		228,661
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	247,132		53,880
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	40,102		37,543
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	15,874		3,183
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,155		3,285
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,900		2,438
Financing Receivable, Revolving	64,558		55,765
Financing Receivable, Revolving Converted to Term Loans	0		0
Loans and Leases Receivable, Net of Deferred Income	482,211		384,755
Financing Receivable, Allowance for Credit Loss	5,914	5,399	5,397	6,559	6,551	7,636
Construction [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	106,490		228,661
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	246,371		53,880
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	40,102		35,795
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	14,137		3,183
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,702		3,285
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,849		2,189
Financing Receivable, Revolving	64,558		55,765
Financing Receivable, Revolving Converted to Term Loans	0		0
Loans and Leases Receivable, Net of Deferred Income	479,209		382,758
Construction [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	761
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	453
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving Converted to Term Loans	0
Loans and Leases Receivable, Net of Deferred Income	1,214
Construction [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		1,748
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,737		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	51		249
Financing Receivable, Revolving	0		0
Financing Receivable, Revolving Converted to Term Loans	0		0
Loans and Leases Receivable, Net of Deferred Income	1,788		1,997
One-to-Four Family Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	88,455		390,238
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	369,197		141,269
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	129,007		56,703
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	44,689		52,111
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	42,336		32,681
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	103,363		116,043
Financing Receivable, Revolving	264,457		223,232
Financing Receivable, Revolving Converted to Term Loans	686		1,631
Loans and Leases Receivable, Net of Deferred Income	1,042,190		1,013,908
Financing Receivable, Allowance for Credit Loss	24,626	24,356	24,123	16,519	15,638	16,875
One-to-Four Family Residential [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	88,455		390,153
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	368,446		140,799
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	128,930		56,520
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	44,689		51,549
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	41,821		32,447
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	102,116		111,307
Financing Receivable, Revolving	264,454		222,747
Financing Receivable, Revolving Converted to Term Loans	429		1,347
Loans and Leases Receivable, Net of Deferred Income	1,039,340		1,006,869
One-to-Four Family Residential [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		85
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	751		470
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	77		183
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		562
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	515		234
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,247		4,736
Financing Receivable, Revolving	3		485
Financing Receivable, Revolving Converted to Term Loans	257		284
Loans and Leases Receivable, Net of Deferred Income	2,850		7,039
Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	3,931		7,045
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	3,696		2,711
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,934		1,950
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,418		13,489
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,899		561
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	10,093		1,290
Financing Receivable, Revolving	23,855		15,876
Financing Receivable, Revolving Converted to Term Loans	5		106
Loans and Leases Receivable, Net of Deferred Income	46,831		43,028
Financing Receivable, Allowance for Credit Loss	1,396	$ 1,403	1,944	$ 1,186	$ 1,163	$ 1,393
Consumer Loan [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	3,931		7,045
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	3,671		2,711
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,934		1,950
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,415		13,489
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,899		560
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	10,082		1,277
Financing Receivable, Revolving	23,855		15,853
Financing Receivable, Revolving Converted to Term Loans	5		97
Loans and Leases Receivable, Net of Deferred Income	46,792		42,982
Consumer Loan [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	25		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		1
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	11		13
Financing Receivable, Revolving	0		23
Financing Receivable, Revolving Converted to Term Loans	0		9
Loans and Leases Receivable, Net of Deferred Income	$ 39		$ 46

Allowance for Credit Losses a_6

Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit (Narrative) (Details)	3 Months Ended
	Jun. 30, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum loan balance of nonaccrual, collateral dependent loans considered for ACL	$ 500,000
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	$ (5,600,000)

Other Real Estate Owned (Summar

Other Real Estate Owned (Summary of Other Real Estate Owned) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other Real Estate Owned [Line Items]
Balance, beginning of period	$ 381	$ 521	$ 381	$ 553
Transfer Other Real Estate Write Down	149	140	149	140
Proceeds from Sale of OREO Property	200	0	200	132
Gain on sale of OREO, net	1	0	1	100
Total OREO, end of period	$ 33	$ 381	$ 33	$ 381

Other Real Estate Owned (Narrat

Other Real Estate Owned (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Other Real Estate Owned [Line Items]
Foreclosed residential real estate properties	$ 33	$ 381	$ 381	$ 381	$ 521	$ 553
Mortgage Loans in Process of Foreclosure, Amount	0
One-to-Four Family Residential [Member]
Other Real Estate Owned [Line Items]
Foreclosed residential real estate properties	$ 0

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Schedule of Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Goodwill and Intangible Assets [Roll Forward]
Total goodwill			$ 823,172
CDI current period amortization	$ (2,219)	$ (1,852)	(4,507)	$ (3,776)
Indefinite-lived Intangible Assets (Excluding Goodwill)	919	919	919	919
Other intangible assets, net	30,140	22,958	30,140	22,958		$ 34,647
Total goodwill and intangible assets, end of period	853,312	788,800	853,312	788,800
Core Deposits [Member]
Goodwill and Intangible Assets [Roll Forward]
Gross core deposit intangible balance, beginning of period					$ 88,931	88,931	$ 105,473	$ 105,473
Accumulated amortization at beginning of period					$ (57,491)	$ (55,203)	$ (81,582)	$ (79,658)
Core deposit intangible, net, beginning of period	31,440	23,891	33,728	25,815
CDI current period amortization	(2,219)	(1,852)	(4,507)	(3,776)
Total core deposit intangible, end of period	$ 29,221	$ 22,039	$ 29,221	$ 22,039

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Estimated Future Amortization Expense of Core Deposit Intangibles) (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Future Amortization Expense For Core Deposit Intangibles
Remainder of 2022	$ 4,191
2023	7,082
2024	5,673
2025	4,366
2026	$ 3,225

Intangible Assets, Goodwill and

Intangible Assets, Goodwill and Other (Details) - Narrative	6 Months Ended
	Jun. 30, 2022
Core Deposits [Member]
Goodwill and Intangible Assets [Line Items]
Estimated life of CDI, in years	10 years

Revolving Line of Credit (Detai

Revolving Line of Credit (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 15,000
Line of Credit [Member]
Line of Credit Facility [Line Items]
Short-term Debt	$ 0	$ 0

Derivatives and Balance Sheet_3

Derivatives and Balance Sheet Offsetting - Fair value of derivatives & classifications table (Details) - Not Designated as Hedging Instrument [Member] - Interest Rate Contracts [Member] - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Fair value of asset derivative instruments	$ 24,063	$ 24,257
Fair value of liability derivative instruments	24,063	24,257
Other Assets [Member] | Interest Rate Lock Commitments Contracts
Derivative [Line Items]
Fair value of asset derivative instruments	90	356
Other Assets [Member] | Interest rate Forward Sales Contracts
Derivative [Line Items]
Fair value of asset derivative instruments	0	0
Other Assets [Member] | Interest Rate Swap Contracts
Derivative [Line Items]
Fair value of asset derivative instruments	24,063	24,257
Other Liabilities [Member] | Interest Rate Lock Commitments Contracts
Derivative [Line Items]
Fair value of liability derivative instruments	0	0
Other Liabilities [Member] | Interest rate Forward Sales Contracts
Derivative [Line Items]
Fair value of liability derivative instruments	20	27
Other Liabilities [Member] | Interest Rate Swap Contracts
Derivative [Line Items]
Fair value of liability derivative instruments	$ 24,063	$ 24,257

Derivatives and Balance Sheet_4

Derivatives and Balance Sheet Offsetting - Cash flow hedge effect on AOCI table (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Balance Sheet Offsetting [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	$ 2,603	$ 2,602	$ 5,178	$ 5,178

Derivatives and Balance Sheet_5

Derivatives and Balance Sheet Offsetting - Not designated as hedging instruments gain/loss table (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Balance Sheet Offsetting [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ (280)	$ (907)	$ (259)	$ (296)
Interest Rate Contracts [Member] | Interest Rate Lock Commitments Contracts
Balance Sheet Offsetting [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	53	(340)	(266)	(511)
Interest Rate Contracts [Member] | Interest rate Forward Sales Contracts
Balance Sheet Offsetting [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(333)	(527)	7	143
Interest Rate Contracts [Member] | Interest Rate Swap Contracts
Balance Sheet Offsetting [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 0	$ (40)	$ 0	$ 72

Derivatives and Balance Sheet_6

Derivatives and Balance Sheet Offsetting - Collateral pledged table (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Balance Sheet Offsetting [Line Items]
Repurchase agreements, amounts offset in balance sheet	$ 0	$ 0
Repurchase agreements, net amount presented in statement of financial position	70,349	86,013
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	(70,349)	(86,013)
Securities sold under agreements to repurchase, amount not offset	0	0
Interest Rate Contracts [Member]
Balance Sheet Offsetting [Line Items]
Derivative Assets, Gross Amounts Offset in the Balance Sheets	0	0
Derivative Asset	24,063	24,257
Derivative, Collateral, Obligation to Return Cash	(24,063)	(450)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	23,807
Derivative Liability, Gross Amounts Offset in Balance Sheets	0	0
Derivative Liability	24,063	24,257
Derivative, Collateral, Right to Reclaim Cash	180	20,747
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	23,883	3,510
Available-for-sale Securities [Member]
Balance Sheet Offsetting [Line Items]
Securities Sold under Agreements to Repurchase, Gross	70,349	86,013
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Balance Sheet Offsetting [Line Items]
Fair value of asset derivative instruments	24,063	24,257
Fair value of liability derivative instruments	$ 24,063	$ 24,257

Derivatives and Balance Sheet_7

Derivatives and Balance Sheet Offsetting - Collateral pledged for repurchase agreements table (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Balance Sheet Offsetting [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	$ 70,349
Secured Borrowings, Gross, Difference, Amount	0
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Balance Sheet Offsetting [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	70,349
Maturity Overnight [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Balance Sheet Offsetting [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	70,349
Maturity Less than 30 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Balance Sheet Offsetting [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	0
Maturity 30 to 90 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Balance Sheet Offsetting [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	0
Maturity Greater than 90 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Balance Sheet Offsetting [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	$ 0

Derivatives and Balance Sheet_8

Derivatives and Balance Sheet Offsetting (Narative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Balance Sheet Offsetting [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ 10,400
Gain on termination of interest rate collar	34,400
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	70,349
Commitments To Originate Loans Held For Sale Member
Balance Sheet Offsetting [Line Items]
Commitments and contingent liabilities	8,800	$ 21,800
Interest rate Forward Sales Contracts
Balance Sheet Offsetting [Line Items]
Commitments and contingent liabilities	7,500	18,500
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Balance Sheet Offsetting [Line Items]
Derivative, Notional Amount	522,500	$ 570,200
Designated as Hedging Instrument [Member] | Interest rate collar [Domain]
Balance Sheet Offsetting [Line Items]
Derivative, Notional Amount	500,000
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Balance Sheet Offsetting [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	$ 70,349

Commitments and contingent li_2

Commitments and contingent liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Commitments to Extend Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 3,710,000	$ 3,500,000
Standby Letters of Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	34,200	$ 36,000
Letter of Credit
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 66		$ 0

Shareholders' Equity (Details)

Shareholders' Equity (Details) - $ / shares	Jul. 21, 2022	Apr. 21, 2022	Jan. 19, 2022
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Declared		$ 0.30	$ 0.30
Subsequent Event [Member]
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.30

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Changes in AOCI by Component) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (227,777)	$ 77,728	$ 35,162	$ 182,195
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(152,860)	21,850	(412,848)	(80,755)
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax	(3,978)	(2,469)	(6,929)	(4,331)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	(156,838)	19,381	(419,777)	(85,086)
Ending balance	(384,615)	97,109	(384,615)	97,109
Unrealized Gains and Losses on Available-for-Sale Debt Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(237,930)	60,569	23,134	163,174
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(152,860)	21,850	(412,848)	(80,755)
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax	(2,080)	(586)	(3,156)	(586)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	(154,940)	21,264	(416,004)	(81,341)
Ending balance	(392,870)	81,833	(392,870)	81,833
Unrealized Gains and Losses on Pension Plan Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(4,711)	(5,718)	(4,812)	(5,833)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	0	0	0
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax	100	115	201	230
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	100	115	201	230
Ending balance	(4,611)	(5,603)	(4,611)	(5,603)
Unrealized gains and losses on cash flow hedge
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	14,864	22,877	16,840	24,854
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	0	0	0
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax	(1,998)	(1,998)	(3,974)	(3,975)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	(1,998)	(1,998)	(3,974)	(3,975)
Ending balance	$ 12,866	$ 20,879	$ 12,866	$ 20,879

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loan interest income	$ 147,451	$ 125,462	$ 293,651	$ 249,456
Income before income taxes	74,978	69,576	148,105	133,977
Income tax provision	(16,170)	(14,537)	(31,775)	(27,085)
Net Income	58,808	55,039	116,330	106,892
Compensation and employee benefits	57,386	53,450	120,465	105,186
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains and Losses on Available-for-Sale Debt Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Debt Securities, Available-for-sale, Realized Gain	0	314	0	314
Income before income taxes	2,710	764	4,112	764
Income tax provision	(630)	(178)	(956)	(178)
Net Income	2,080	586	3,156	586
Reclassification out of Accumulated Other Comprehensive Income [Member] | Amortization of unrealized gains and losses related to available for sale securities transfer
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loan interest income	2,710	450	4,112	450
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains and Losses on Pension Plan Liability [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(131)	(149)	(262)	(299)
Income tax provision	31	34	61	69
Net Income	(100)	(115)	(201)	(230)
Compensation and employee benefits	(131)	(149)	(262)	(299)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized gains and losses from hedging instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	2,603	2,602	5,178	5,178
Income tax provision	(605)	(604)	(1,204)	(1,203)
Net Income	1,998	1,998	3,974	3,975
Loans	$ 2,603	$ 2,602	$ 5,178	$ 5,178

Fair Value Accounting and Mea_3

Fair Value Accounting and Measurement (Financial Assets And Liabilities Accounted for Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	$ 5,122,568	$ 5,910,999
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	5,122,568	5,910,999
Loans held for sale	3,505	9,570
Interest rate derivative asset	24,063	24,257
Interest rate derivative liability	24,063	24,257
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	171,319	157,536
Loans held for sale	0	0
Interest rate derivative asset	0	0
Interest rate derivative liability	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	4,951,249	5,753,463
Loans held for sale	3,505	9,570
Interest rate derivative asset	24,063	24,257
Interest rate derivative liability	24,063	24,257
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
Loans held for sale	0	0
Interest rate derivative asset	0	0
Interest rate derivative liability	0	0
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	3,138,764	3,745,601
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	3,138,764	3,745,601
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	379,968	463,063
Asset-backed Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	379,968	463,063
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	379,968	463,063
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
State and Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	878,328	997,291
State and Municipal Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	878,328	997,291
State and Municipal Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
State and Municipal Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	878,328	997,291
State and Municipal Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
U.S. Government Agency [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	229,428	252,576
U.S. Government Agency [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
U.S. Government Agency [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	229,428	252,576
U.S. Government Agency [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	171,319	157,536
US Treasury Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	171,319	157,536
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	171,319	157,536
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value		0
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
Non-agency collateralized mortgage obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	324,761	294,932
Non-agency collateralized mortgage obligations [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	324,761	294,932
Non-agency collateralized mortgage obligations [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
Non-agency collateralized mortgage obligations [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	324,761	294,932
Non-agency collateralized mortgage obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale at fair value	0	0
Interest Rate Lock Commitments Contracts | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate derivative asset	90	356	$ 585
Interest Rate Lock Commitments Contracts | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate derivative asset	0	0
Interest Rate Lock Commitments Contracts | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate derivative asset	0	0
Interest Rate Lock Commitments Contracts | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate derivative asset	90	356
Interest rate Forward Sales Contracts | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	20	27
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	0	0
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	20	27
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	$ 0	$ 0

Fair Value Accounting and Mea_4

Fair Value Accounting and Measurement (IRL Quantitative Information About Level 3 Fair Value Measurements) (Details) $ in Thousands	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)
Measurement input pull through rate member | Valuation technique internal pricing model member | Interest Rate Lock Commitments Contracts | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements Inputs and Valuation Techniques
Interest rate derivative asset, Measurement Input	0.7510		0.7850
Measurement input pull through rate member | Valuation technique internal pricing model member | Interest Rate Lock Commitments Contracts | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements Inputs and Valuation Techniques
Interest rate derivative asset, Measurement Input	1		0.9853
Measurement input pull through rate member | Valuation technique internal pricing model member | Interest Rate Lock Commitments Contracts | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements Inputs and Valuation Techniques
Interest rate derivative asset, Measurement Input	0.9064		0.8889
Fair Value, Recurring [Member]
Fair Value Measurements Inputs and Valuation Techniques
Interest rate derivative asset	$ 24,063	$ 24,257
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements Inputs and Valuation Techniques
Interest rate derivative asset	0	0
Fair Value, Recurring [Member] | Interest Rate Lock Commitments Contracts
Fair Value Measurements Inputs and Valuation Techniques
Interest rate derivative asset	90	356	$ 585
Fair Value, Recurring [Member] | Interest Rate Lock Commitments Contracts | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements Inputs and Valuation Techniques
Interest rate derivative asset	$ 90	$ 356

Fair Value Accounting and Mea_5

Fair Value Accounting and Measurement (IRL rollforward) (Details) - Interest Rate Lock Commitments Contracts - Fair Value, Inputs, Level 3 [Member] - Fair Value, Recurring [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Balance - Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 90	$ 585	$ 90	$ 585	$ 36	$ 356	$ 925	$ 1,096
Change included in Earnings - Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	165	2,134	146	3,844
Settlements - Fair Value Net Derivative Asset (Liability) Measured on Recurring Basis with Unobserved Inputs reconciliation, Sales and Settlements	$ (111)	$ (2,474)	$ (412)	$ (4,355)

Fair Value Accounting and Mea_6

Fair Value Accounting and Measurement (Financial Assets Accounted For Fair Value On Nonrecurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 27	$ (57)	$ (170)	$ (145)
Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent loans, Fair Value		4,331		4,331
Other real estate owned, fair value disclosure		375		375
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent loans, Fair Value		0		0
Other real estate owned, fair value disclosure		0		0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent loans, Fair Value		0		0
Other real estate owned, fair value disclosure		0		0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent loans, Fair Value	$ 0	4,331	0	4,331
Other real estate owned, fair value disclosure		375		375
Collateral dependent loans [Domain] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		(383)	$ 1,500	(383)
Other real estate owned | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		$ (140)		$ (140)

Fair Value Accounting and Mea_7

Fair Value Accounting and Measurement (Quantitative Information About Level 3 Fair Value Measurements) (Details) - Fair Value, Nonrecurring [Member] $ in Thousands	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Fair Value Measurements Inputs and Valuation Techniques
Collateral dependent loans, Fair Value		$ 4,331
Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements Inputs and Valuation Techniques
Collateral dependent loans, Fair Value	$ 0	$ 4,331
Valuation, Market Approach [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements Inputs and Valuation Techniques
Collateral dependent loans, Measurement Input		0
Valuation, Market Approach [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements Inputs and Valuation Techniques
Collateral dependent loans, Measurement Input		0.3100
Valuation, Market Approach [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements Inputs and Valuation Techniques
Collateral dependent loans, Measurement Input		0.0367

Fair Value Accounting and Mea_8

Fair Value Accounting and Measurement (Carrying Amounts and Estimated Fair Values of Selected Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets
Interest-earning deposits with banks	$ 174,328	$ 671,300
Debt securities available for sale at fair value	5,122,568	5,910,999
Debt Securities, Held-to-Maturity, Amortized Cost	2,149,255	2,148,327
Debt Securities, Held-to-maturity, Fair Value	1,912,526	2,122,606
Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	239,868	153,414
Interest-earning deposits with banks	174,328	671,300
Debt securities available for sale at fair value	5,122,568	5,910,999
Debt Securities, Held-to-maturity, Fair Value	1,912,526	2,122,606
FHLB stock	10,280	10,280
Loans held for sale	3,718	9,774
Loans	11,060,539	10,679,349
Liabilities
Deposits	392,047	430,682
FHLB advances	7,685	8,752
Repurchase agreements	70,349	86,013
Subordinated Debentures	10,013	10,125
Junior subordinated debentures, fair value disclosure	12,813	9,927
Carrying Amount
Assets
Cash and due from banks	239,868	153,414
Interest-earning deposits with banks	174,328	671,300
Debt securities available for sale at fair value	5,122,568	5,910,999
Debt Securities, Held-to-Maturity, Amortized Cost	2,149,255	2,148,327
FHLB stock	10,280	10,280
Loans held for sale	3,718	9,774
Loans	11,172,452	10,486,359
Liabilities
Deposits	400,553	445,957
FHLB advances	7,331	7,359
Repurchase agreements	70,349	86,013
Subordinated Debentures	10,000	10,000
Junior subordinated debentures, fair value disclosure	10,310	10,310
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	239,868	153,414
Interest-earning deposits with banks	174,328	671,300
Debt securities available for sale at fair value	171,319	157,536
Debt Securities, Held-to-maturity, Fair Value	0	0
FHLB stock	0	0
Loans held for sale	0	0
Loans	0	0
Liabilities
Deposits	0	0
FHLB advances	0	0
Repurchase agreements	0	0
Subordinated Debentures	0	0
Junior subordinated debentures, fair value disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	0	0
Interest-earning deposits with banks	0	0
Debt securities available for sale at fair value	4,951,249	5,753,463
Debt Securities, Held-to-maturity, Fair Value	1,912,526	2,122,606
FHLB stock	10,280	10,280
Loans held for sale	3,718	9,774
Loans	0	0
Liabilities
Deposits	392,047	430,682
FHLB advances	7,685	8,752
Repurchase agreements	70,349	86,013
Subordinated Debentures	10,013	10,125
Junior subordinated debentures, fair value disclosure	12,813	9,927
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	0	0
Interest-earning deposits with banks	0	0
Debt securities available for sale at fair value	0	0
Debt Securities, Held-to-maturity, Fair Value	0	0
FHLB stock	0	0
Loans held for sale	0	0
Loans	11,060,539	10,679,349
Liabilities
Deposits	0	0
FHLB advances	0	0
Repurchase agreements	0	0
Subordinated Debentures	0	0
Junior subordinated debentures, fair value disclosure	0	0
Interest Rate Swap Contracts | Estimate of Fair Value Measurement [Member]
Assets
Interest rate derivative asset	24,063	24,257
Liabilities
Interest rate derivative liability	24,063	24,257
Interest Rate Swap Contracts | Carrying Amount
Assets
Interest rate derivative asset	24,063	24,257
Liabilities
Interest rate derivative liability	24,063	24,257
Interest Rate Swap Contracts | Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Interest rate derivative asset	0	0
Liabilities
Interest rate derivative liability	0	0
Interest Rate Swap Contracts | Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Interest rate derivative asset	24,063	24,257
Liabilities
Interest rate derivative liability	24,063	24,257
Interest Rate Swap Contracts | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Interest rate derivative asset	0	0
Liabilities
Interest rate derivative liability	0	0
Interest Rate Lock Commitments Contracts | Estimate of Fair Value Measurement [Member]
Assets
Interest rate derivative asset	90	356
Interest Rate Lock Commitments Contracts | Carrying Amount
Assets
Interest rate derivative asset	90	356
Interest Rate Lock Commitments Contracts | Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Interest rate derivative asset	0	0
Interest Rate Lock Commitments Contracts | Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Interest rate derivative asset	0	0
Interest Rate Lock Commitments Contracts | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Interest rate derivative asset	90	356
Interest rate Forward Sales Contracts | Estimate of Fair Value Measurement [Member]
Liabilities
Interest rate derivative liability	20	27
Interest rate Forward Sales Contracts | Carrying Amount
Liabilities
Interest rate derivative liability	20	27
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Liabilities
Interest rate derivative liability	0	0
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Liabilities
Interest rate derivative liability	20	27
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Liabilities
Interest rate derivative liability	$ 0	$ 0

Fair Value Accounting and Mea_9

Fair Value Accounting and Measurement (Aggregate FV and aggregate unpaid principal balance of LHFS under FV option (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value Disclosures [Abstract]
FV, Loans held for sale, FV option, Mandatory Delivery method	$ 3,505	$ 9,570
Fair Value, Loans held for sale, FV option, Aggregate Unpaid Principal Balance	3,506	9,401
Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables	$ (1)	$ 169

Fair Value Accounting and Me_10

Fair Value Accounting and Measurement - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 27	$ (57)	$ (170)	$ (145)

Earnings per Common Share (Deta

Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 58,808	$ 55,039	$ 116,330	$ 106,892
Earnings allocated to participating securities - nonvested restricted shares	0	70	47	227
Earnings allocated to common shareholders, Basic	$ 58,808	$ 54,969	$ 116,283	$ 106,665
Weighted average common shares outstanding	78,049	70,987	77,989	70,924
Basic earnings per common share	$ 0.75	$ 0.77	$ 1.49	$ 1.50
Earnings allocated to common shareholders, Diluted	$ 58,808	$ 54,969	$ 116,283	$ 106,665
Dilutive effect of equity awards	65	177	110	155
Weighted average diluted common shares outstanding	78,114	71,164	78,099	71,079
Diluted earnings per common share	$ 0.75	$ 0.77	$ 1.49	$ 1.50
Potentially dilutive stock awards and units that were not included in the computation of diluted EPS because to do so would be anti-dilutive.	600	248	389	158

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Deposit account and treasury management fees	$ 8,212	$ 6,701	$ 15,325	$ 13,059
Card revenue	5,031	4,773	9,998	8,506
Financial services and trust revenue	4,192	4,245	8,824	7,626
Revenue from contracts with customers	17,435	15,719	34,147	29,191
Noninterest income, excluding revenue from contracts with customers	7,571	7,011	15,039	16,705
Noninterest income	$ 25,006	$ 22,730	$ 49,186	$ 45,896