10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

________________________________________________________ 

FORM 10-Q

________________________________________________________  

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2021.

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from              to            

Commission File Number 000-20288

 _________________________________________________________________________

COLUMBIA BANKING SYSTEM, INC.

(Exact name of registrant as specified in its charter)

 _______________________________________________________________

Washington	91-1422237
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

1301 A Street

Tacoma, Washington 98402-2156

(Address of principal executive offices and zip code)

(253) 305-1900

(Registrant’s telephone number, including area code)

Securities Registered Pursuant to Section 12(b) of the Act:
Common Stock, No Par Value	COLB	The Nasdaq Stock Market LLC
(Title of each class)	(Trading symbol)	(Name of each exchange on which registered)

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes x No ¨ 

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes x No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). 

Yes ☐  No x

The number of shares of common stock outstanding at July 31, 2021 was 71,767,227

TABLE OF CONTENTS

		Page
	PART I — FINANCIAL INFORMATION
Item 1.	Financial Statements (unaudited)
	Consolidated Balance Sheets - June 30, 2021 and December 31, 2020	1
	Consolidated Statements of Income - three and six months ended June 30, 2021 and 2020	2
	Consolidated Statements of Comprehensive Income - three and six months ended June 30, 2021 and 2020	3
	Consolidated Statements of Changes in Shareholders’ Equity - three and six months ended June 30, 2021 and 2020	4
	Consolidated Statements of Cash Flows - six months ended June 30, 2021 and 2020	6
	Notes to Unaudited Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	36
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	56
Item 4.	Controls and Procedures	57
	PART II — OTHER INFORMATION
Item 1.	Legal Proceedings	58
Item 1A.	Risk Factors	58
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	58
Item 3.	Defaults Upon Senior Securities	58
Item 4.	Mine Safety Disclosures	58
Item 5.	Other Information	58
Item 6.	Exhibits	59
	Signatures	60

i

Glossary of Acronyms, Abbreviations, and Terms

The acronyms, abbreviations, and terms listed below are used in various sections of the Form 10-Q, including “Item 1. Financial Statements” and “Item 2. Management Discussion and Analysis of Financial Condition and Results of Operations.”

ACL	Allowance for Credit Losses	FASB	Financial Accounting Standards Board
ASC	Accounting Standards Codification	FDIC	Federal Deposit Insurance Corporation
ASC 326	Codification related to measurement of credit losses on financial instruments	FHLB	Federal Home Loan Bank of Des Moines
ASU	Accounting Standards Update	FRB	Federal Reserve Bank
ATM	Automated Teller Machine	GAAP	Generally Accepted Accounting Principles
Bank of Commerce	Bank of Commerce Holdings	GDP	Gross Domestic Product
B&O	Business and Occupation	Intermountain	Intermountain Community Bancorp
Basel III	A comprehensive capital framework and rules for U.S. banking organizations approved by the FRB and the FDIC in 2013	LIBOR	London Interbank Offering Rate
BOLI	Bank Owned Life Insurance	N/M	Not meaningful
Capital Rules	Risk-based capital standards currently applicable to the Company and the Bank.	OPPO	Other Personal Property Owned
CARES Act	Coronavirus Aid Relief and Economic Security Act	OREO	Other Real Estate Owned
CDI	Core Deposit Intangible	Pacific Continental	Pacific Continental Corporation
CECL	Current Expected Credit Losses	PPP	Paycheck Protection Program
CEO	Chief Executive Officer	RSA	Restricted Stock Awards
CET1	Common Equity Tier 1	RSU	Restricted Stock Units
CFO	Chief Financial Officer	SBA	Small Business Administration
COVID-19	Novel Coronavirus	SEC	Securities and Exchange Commission
DCF	Discounted Cash Flow	TDRs	Troubled Debt Restructurings
Dodd-Frank Act	Dodd-Frank Wall Street Reform and Consumer Protection Act	West Coast	West Coast Bancorp
EPS	Earnings Per Share

ii

PART I - FINANCIAL INFORMATION

Item 1. FINANCIAL STATEMENTS

CONSOLIDATED BALANCE SHEETS
Columbia Banking System, Inc.
(Unaudited)
			June 30, 2021		December 31, 2020
ASSETS			(in thousands)
Cash and due from banks			$	218,649	$	218,899
Interest-earning deposits with banks			612,883		434,867
Total cash and cash equivalents			831,532		653,766
Debt securities available for sale at fair value (amortized cost of $4,103,196 and $4,997,529, respectively)			4,190,066		5,210,134
Debt securities held to maturity at amortized cost (fair value of $2,032,980 and $—, respectively)			2,024,715		—
Equity securities			13,425		13,425
FHLB stock at cost			10,280		10,280
Loans held for sale			13,179		26,481
Loans, net of unearned income			9,693,116		9,427,660
Less: ACL			142,988		149,140
Loans, net			9,550,128		9,278,520
Interest receivable			52,347		54,831
Premises and equipment, net			158,827		162,059
OREO			381		553
Goodwill			765,842		765,842
Other intangible assets, net			22,958		26,734
Other assets			379,797		382,154
Total assets			$	18,013,477	$	16,584,779
LIABILITIES AND SHAREHOLDERS’ EQUITY
Deposits:
Noninterest-bearing			$	7,703,325	$	6,913,214
Interest-bearing			7,642,107		6,956,648
Total deposits			15,345,432		13,869,862
FHLB advances			7,386		7,414
Securities sold under agreements to repurchase			70,994		73,859
Subordinated debentures			35,000		35,092
Other liabilities			221,419		250,945
Total liabilities			15,680,231		14,237,172
Commitments and contingent liabilities (Note 10)
Shareholders’ equity:
	June 30, 2021	December 31, 2020
	(in thousands)
Preferred stock (no par value)
Authorized shares	2,000	2,000
Common stock (no par value)
Authorized shares	115,000	115,000
Issued	73,926	73,782	1,664,953		1,660,998
Outstanding	71,742	71,598
Retained earnings			642,018		575,248
Accumulated other comprehensive income			97,109		182,195
Treasury stock at cost	2,184	2,184	(70,834)		(70,834)
Total shareholders’ equity			2,333,246		2,347,607
Total liabilities and shareholders’ equity			$	18,013,477	$	16,584,779

See accompanying Notes to unaudited Consolidated Financial Statements.

1

CONSOLIDATED STATEMENTS OF INCOME
Columbia Banking System, Inc.
(Unaudited)
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
	(in thousands except per share amounts)
Interest Income
Loans	$	99,712	$	105,496	$	200,027	$	212,862
Taxable securities	24,750		18,343		47,566		39,431
Tax-exempt securities	2,826		2,257		5,585		4,559
Deposits in banks	159		136		311		277
Total interest income	127,447		126,232		253,489		257,129
Interest Expense
Deposits	1,426		2,094		2,911		5,736
FHLB advances and FRB borrowings	72		1,796		144		6,025
Subordinated debentures	468		468		936		936
Other borrowings	19		23		42		159
Total interest expense	1,985		4,381		4,033		12,856
Net Interest Income	125,462		121,851		249,456		244,273
Provision (recapture) for credit losses	(5,500)		33,500		(6,300)		75,000
Net interest income after provision (recapture) for credit losses	130,962		88,351		255,756		169,273
Noninterest Income
Deposit account and treasury management fees	6,701		6,092		13,059		13,880
Card revenue	4,773		3,079		8,506		6,597
Financial services and trust revenue	4,245		3,163		7,626		6,228
Loan revenue	4,514		5,607		11,883		10,197
Bank owned life insurance	1,635		1,618		3,195		3,214
Investment securities gains, net	314		16,425		314		16,674
Other	548		1,275		1,313		1,676
Total noninterest income	22,730		37,259		45,896		58,466
Noninterest Expense
Compensation and employee benefits	53,450		46,043		105,186		100,885
Occupancy	9,038		8,812		18,044		18,009
Data processing and software	7,402		7,981		15,853		15,080
Legal and professional fees	3,264		3,483		6,079		5,585
Amortization of intangibles	1,852		2,210		3,776		4,520
B&O taxes	1,490		1,244		2,749		1,868
Advertising and promotion	588		837		1,348		2,142
Regulatory premiums	1,112		1,034		2,217		1,068
Net cost (benefit) of operation of OREO	111		(200)		48		(188)
Other	5,809		9,389		12,375		16,135
Total noninterest expense	84,116		80,833		167,675		165,104
Income before income taxes	69,576		44,777		133,977		62,635
Income tax provision	14,537		8,195		27,085		11,425
Net Income	$	55,039	$	36,582	$	106,892	$	51,210
Earnings per common share
Basic	$	0.77	$	0.52	$	1.50	$	0.72
Diluted	$	0.77	$	0.52	$	1.50	$	0.72
Weighted average number of common shares outstanding	70,987		70,679		70,924		70,942
Weighted average number of diluted common shares outstanding	71,164		70,711		71,079		70,981

See accompanying Notes to unaudited Consolidated Financial Statements.

2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Columbia Banking System, Inc.
(Unaudited)
	Three Months Ended
	June 30,
	2021		2020
	(in thousands)
Net income	$	55,039	$	36,582
Other comprehensive income, net of tax:
Unrealized gain from securities:
Net unrealized holding gain from available for sale debt securities arising during the period, net of tax of $(6,619) and $(12,984)	21,850		42,860
Reclassification adjustment of net gain from available for sale debt securities arising during the period, net of tax of $73 and $0	(241)		—
Amortization of net unrealized gain for the reclassification of available for sale securities to held to maturity, net of tax of $105 and $0	(345)		—
Net unrealized gain from securities, net of reclassification adjustment	21,264		42,860
Pension plan liability adjustment:
Amortization of unrecognized net actuarial loss included in net periodic pension cost, net of tax of $(34) and $(24)	115		79
Pension plan liability adjustment, net	115		79
Unrealized gain from cash flow hedging instruments:
Net unrealized gain in cash flow hedging instruments arising during the period, net of tax of $0 and $(791)	—		2,611
Reclassification adjustment for net gain in cash flow hedging instruments included in income, net of tax of $604 and $510	(1,998)		(1,680)
Net unrealized gain (loss) from cash flow hedging instruments, net of reclassification adjustment	(1,998)		931
Other comprehensive income	19,381		43,870
Total comprehensive income	$	74,420	$	80,452

	Six Months Ended
	June 30,
	2021		2020
	(in thousands)
Net income	$	106,892	$	51,210
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) from securities:
Net unrealized holding gain (loss) from available for sale debt securities arising during the period, net of tax of $24,463 and $(37,126)	(80,755)		122,556
Reclassification adjustment of net gain from available for sale debt securities arising during the period, net of tax of $73 and $58	(241)		(191)
Amortization of net unrealized gain for the reclassification of available for sale securities to held to maturity, net of tax of $105 and $0	(345)		—
Net unrealized gain (loss) from securities, net of reclassification adjustment	(81,341)		122,365
Pension plan liability adjustment:
Amortization of unrecognized net actuarial loss included in net periodic pension cost, net of tax of $(69) and $(48)	230		159
Pension plan liability adjustment, net	230		159
Unrealized gain from cash flow hedging instruments:
Net unrealized gain in cash flow hedging instruments arising during the period, net of tax of $0 and $(6,237)	—		20,588
Reclassification adjustment for net gain in cash flow hedging instruments included in income, net of tax of $1,203 and $728	(3,975)		(2,402)
Net unrealized gain (loss) from cash flow hedging instruments, net of reclassification adjustment	(3,975)		18,186
Other comprehensive income (loss)	(85,086)		140,710
Total comprehensive income	$	21,806	$	191,920

See accompanying Notes to unaudited Consolidated Financial Statements.

3

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY
Columbia Banking System, Inc.
(Unaudited)
	Common Stock			Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Treasury Stock		Total Shareholders’ Equity
	Shares Outstanding	Amount
For the Three Months Ended June 30, 2021	(in thousands except per share amounts)
Balance at April 1, 2021	71,739	$	1,661,129	$	607,040	$	77,728	$	(70,834)	$	2,275,063
Net income	—	—		55,039		—		—		55,039
Other comprehensive income	—	—		—		19,381		—		19,381
Activity in deferred compensation plan	—	(8)		—		—		—		(8)
Issuance of common stock - RSAs and RSUs, net of canceled awards	4	3,908		—		—		—		3,908
Purchase and retirement of common stock	(1)	(76)		—		—		—		(76)
Cash dividends declared on common stock ($0.28 per share)	—	—		(20,061)		—		—		(20,061)
Balance at June 30, 2021	71,742	$	1,664,953	$	642,018	$	97,109	$	(70,834)	$	2,333,246
For the Six Months Ended June 30, 2021
Balance at January 1, 2021	71,598	$	1,660,998	$	575,248	$	182,195	$	(70,834)	$	2,347,607
Net income	—	—		106,892		—		—		106,892
Other comprehensive loss	—	—		—		(85,086)		—		(85,086)
Issuance of common stock - employee stock purchase plan	41	1,098		—		—		—		1,098
Activity in deferred compensation plan	—	(8)		—		—		—		(8)
Issuance of common stock - RSAs and RSUs, net of canceled awards	192	6,936		—		—		—		6,936
Purchase and retirement of common stock	(89)	(4,071)		—		—		—		(4,071)
Cash dividends declared on common stock ($0.56 per share)	—	—		(40,122)		—		—		(40,122)
Balance at June 30, 2021	71,742	$	1,664,953	$	642,018	$	97,109	$	(70,834)	$	2,333,246

4

	Common Stock			Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Treasury Stock		Total Shareholders’ Equity
	Shares Outstanding	Amount
For the Three Months Ended June 30, 2020	(in thousands except per share amounts)
Balance at April 1, 2020	71,575	$	1,651,399	$	495,830	$	137,207	$	(70,834)	$	2,213,602
Net income	—	—		36,582		—		—		36,582
Other comprehensive income	—	—		—		43,870		—		43,870
Activity in deferred compensation plan	—	1		—		—		—		1
Issuance of common stock - RSAs and RSUs, net of canceled awards	12	2,737		—		—		—		2,737
Purchase and retirement of common stock	(1)	(8)		—		—		—		(8)
Cash dividends declared on common stock ($0.28 per share)	—	—		(20,029)		—		—		(20,029)
Balance at June 30, 2020	71,586	$	1,654,129	$	512,383	$	181,077	$	(70,834)	$	2,276,755
For the Six Months Ended June 30, 2020
Balance at January 1, 2020	72,124	$	1,650,753	$	519,676	$	40,367	$	(50,834)	$	2,159,962
Adjustment to opening retained earnings pursuant to adoption of ASU 2016-02	—	—		(2,457)		—		—		(2,457)
Net income	—	—		51,210		—		—		51,210
Other comprehensive income	—	—		—		140,710		—		140,710
Issuance of common stock - employee stock purchase plan	26	945		—		—		—		945
Activity in deferred compensation plan	—	4		—		—		—		4
Issuance of common stock - RSAs and RSUs, net of canceled awards	234	4,909		—		—		—		4,909
Purchase and retirement of common stock	(67)	(2,482)		—		—		—		(2,482)
Cash dividends declared on common stock ($0.78 per share)	—	—		(56,046)		—		—		(56,046)
Purchase of treasury stock	(731)	—		—		—		(20,000)		(20,000)
Balance at June 30, 2020	71,586	$	1,654,129	$	512,383	$	181,077	$	(70,834)	$	2,276,755

See accompanying Notes to unaudited Consolidated Financial Statements.

5

CONSOLIDATED STATEMENTS OF CASH FLOWS
Columbia Banking System, Inc.
(Unaudited)
	Six Months Ended June 30,
	2021		2020
	(in thousands)
Cash Flows From Operating Activities
Net income	$	106,892	$	51,210
Adjustments to reconcile net income to net cash provided by operating activities
Provision (recapture) for credit losses	(6,300)		75,000
Stock-based compensation expense	6,936		4,909
Depreciation, amortization and accretion	7,056		10,382
Investment securities gain, net	(314)		(16,674)
Net realized gain on sale of premises and equipment, loans held for investment and OPPO	(279)		(705)
Net realized loss on sale and valuation adjustments of OREO	40		18
Gain on bank owned life insurance death benefit	(209)		—
Originations of loans held for sale	(195,632)		(217,017)
Proceeds from sales of loans held for sale	208,789		205,932
Change in fair value of loans held for sale	145		—
Net change in:
Interest receivable	2,484		(12,310)
Interest payable	(49)		(219)
Other assets	12,583		(93,919)
Other liabilities	(14,700)		76,500
Net cash provided by operating activities	127,442		83,107
Cash Flows From Investing Activities
Loans originated, net of principal collected	(177,399)		(1,026,250)
Purchases of:
Debt securities available for sale	(1,527,512)		(259,236)
Debt securities held to maturity	(22,915)		—
Loans held for investment	(74,383)		—
Premises and equipment	(3,087)		(4,490)
FHLB stock	—		(53,240)
Proceeds from:
Sales of debt securities available for sale	26,914		194,105
Sales of equity securities	—		3,000
Principal repayments and maturities of debt securities available for sale	385,408		265,072
Principal repayments and maturities of debt securities held to maturity	8,711		—
Sales of premises and equipment and loans held for investment	4,296		932
Redemption of FHLB stock	—		85,080
Sales of OREO and OPPO	132		353
Bank owned life insurance death benefit	671		1,050
Net cash used in investing activities	(1,379,164)		(793,624)

6

CONSOLIDATED STATEMENTS OF CASH FLOWS
Columbia Banking System, Inc.
(Unaudited)
	Six Months Ended June 30,
	2021		2020
	(in thousands)
Cash Flows From Financing Activities
Net increase in deposits	1,475,570		2,446,782
Net decrease in sweep repurchase agreements	(2,865)		(12,958)
Proceeds from:
FHLB advances	10		1,331,000
FRB borrowings	—		222,010
Other borrowings	—		9,222
Employee stock purchase plan	1,098		945
Payments for:
Repayment of FHLB advances	(10)		(2,127,000)
Repayment of FRB borrowings	—		(222,010)
Repayment of other borrowings	—		(9,222)
Common stock dividends	(40,244)		(55,750)
Purchase of treasury stock	—		(20,000)
Purchase and retirement of common stock	(4,071)		(2,482)
Net cash provided by financing activities	1,429,488		1,560,537
Increase in cash and cash equivalents	177,766		850,020
Cash and cash equivalents at beginning of period	653,766		247,673
Cash and cash equivalents at end of period	$	831,532	$	1,097,693
Supplemental Information:
Interest paid	$	4,082	$	13,075
Income taxes paid, net of refunds	$	28,474	$	21,501
Non-cash investing and financing activities
Transfer of debt securities available for sale to debt securities held to maturity	$	2,012,123	$	—
Loans transferred to OREO	$	—	$	558
Premises and equipment expenditures incurred but not yet paid	$	—	$	9
Change in dividends payable on unvested shares included in other liabilities	$	(122)	$	296

See accompanying Notes to unaudited Consolidated Financial Statements.

7

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

Columbia Banking System, Inc.

1.Basis of Presentation, Significant Accounting Policies and Reclassifications

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, 2021 are not necessarily indicative of results to be anticipated for the year ending December 31, 2021. The accompanying interim unaudited Consolidated Financial Statements should be read in conjunction with the financial statements and related notes contained in the Company’s 2020 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 2020 Annual Report on Form 10-K. There have not been any changes in our significant accounting policies compared to those contained in our 2020 Form 10-K disclosure for the year ended December 31, 2020.

Reclassifications

Certain amounts reported in prior periods have been reclassified in the Consolidated Financial Statements to conform to the current presentation. Specifically, amounts related to software expense, which prior to January 1, 2021 had historically been included in “Other” noninterest expense, have been combined with data processing expense in the row titled “Data processing and software” in the Consolidated Statements of Income. The reclassifications have no effect on net income or shareholders’ equity as previously reported.

2.Accounting Pronouncements Recently Adopted or Issued

Accounting Standards Adopted in 2021

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting. In response to concerns about structural risks of the cessation of LIBOR, the amendments in this ASU provide optional guidance for a limited time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this ASU provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments in this ASU apply only to contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022. The amendments in this ASU are elective and were effective March 12, 2020 for all entities. The adoption of this ASU did not have a material impact on the Company’s Consolidated Financial Statements.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes. The guidance issued in this ASU simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period and the recognition for deferred tax liabilities for outside basis differences. This ASU also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. The ASU is effective for interim and annual reporting periods beginning after December 15, 2020. The adoption of this ASU did not have a material impact on the Company’s Consolidated Financial Statements.

8

In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848) - Scope. The amendments in this ASU clarify that certain optional expedients and exceptions for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. Certain provisions, if elected, apply to derivative instruments that use an interest rate for margining, discounting or contract price alignment that is modified as a result of reference rate reform. Amendments in this ASU to the expedients and exceptions in Topic 848 capture the incremental consequences of the scope clarification and tailor the existing guidance to derivative instruments affected by the discounting transition. The ASU is effective for interim and annual reporting periods beginning on January 7, 2021. The adoption of this ASU is not expected to have a material impact on the Company’s Consolidated Financial Statements.

Recently Issued Accounting Standards, Not Yet Adopted

There are no recently issued accounting standards that are applicable to the Company and not yet adopted.

3.Securities

During the second quarter of 2021, the Company transferred, at fair value, $2.01 billion of U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations from the available for sale classification to the held to maturity classification. The net unrealized after tax gain of $15.5 million remained in accumulated other comprehensive income and will be amortized over the remaining life of the securities, offsetting the related amortization of discount or premium on the transferred securities. No gains or losses were recognized at the time of the transfer.

The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of debt securities:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
June 30, 2021	(in thousands)
Available for sale
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	2,671,827	$	74,715	$	(9,342)	$	2,737,200
Other asset-backed securities	429,983		6,307		(3,976)		432,314
State and municipal securities	748,224		18,294		(2,458)		764,060
U.S. government agency and government-sponsored enterprise securities	253,162		4,663		(1,333)		256,492
Total available for sale	$	4,103,196	$	103,979	$	(17,109)	$	4,190,066
Held to maturity
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	2,024,715	$	9,586	$	(1,321)	$	2,032,980
Total held to maturity	$	2,024,715	$	9,586	$	(1,321)	$	2,032,980
December 31, 2020
Available for sale
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	3,640,351	$	178,579	$	(4,543)	$	3,814,387
Other asset-backed securities	349,904		9,651		(2,076)		357,479
State and municipal securities	729,066		25,098		(592)		753,572
U.S. government agency and government-sponsored enterprise securities	278,208		6,545		(57)		284,696
Total available for sale	$	4,997,529	$	219,873	$	(7,268)	$	5,210,134

There was no allowance for credit losses on both available for sale securities and held to maturity securities as of June 30, 2021 and December 31, 2020. 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 and/or implicit guarantee of the U.S. government, are widely recognized as “risk free,” and have a long history of zero credit loss.

9

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 and six months ended June 30, 2021 and 2020.

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, 2021 and December 31, 2020, accrued interest receivable for securities available for sale was $15.1 million and $17.1 million, respectively. Accrued interest for securities held to maturity was $4.2 million at June 30, 2021. There was no accrued interest receivable related to securities held to maturity at December 31, 2020, as the Company did not have held to maturity securities at that date. 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,
	2021		2020		2021		2020
	(in thousands)
Proceeds from sales of debt securities available for sale	$	26,914	$	—	$	26,914	$	194,105
Gross realized gains from sales of debt securities available for sale	$	751	$	—	$	751	$	435
Gross realized losses from sales of debt securities available for sale	(437)		—		(437)		(186)
Other securities gains (1)	—		16,425		—		16,425
Investment securities gains, net	$	314	$	16,425	$	314	$	16,674

__________

(1) Other securities gains includes gain from sale of Visa Class B restricted stock and subsequent write up to fair value of remaining Visa Class B shares. For additional information, please see Note 13.

The following table provides the unrealized gains and losses on equity securities at the reporting date:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	(in thousands)
Gains recognized during the period on equity securities (1)	$	—	$	16,425	$	—	$	16,425
Less: Gains recognized during the period on equity securities sold during the period (1)	—		(3,000)		—		(3,000)
Unrealized gains recognized during the reporting period on equity securities still held at the reporting date (1)	$	—	$	13,425	$	—	$	13,425

__________

(1) Visa Class B restricted stock owned by the Company was carried at a zero-cost basis prior to June 2020 due to existing transfer restrictions and uncertainty regarding the outcome of Visa’s litigation that must be settled before the Visa Class B restricted shares may be converted into publicly traded Visa Class A common shares. The sale of shares by the Company of Visa Class B restricted shares during the three months ended June 30, 2020 resulted in an observable market price. As a result, the Company adjusted the carrying value of its remaining shares of Visa Class B restricted shares upward to this observable market price.

The scheduled contractual maturities of debt securities at the period presented below are as follows:

	June 30, 2021
	Available for sale				Held to maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(in thousands)
Due within one year	$	57,266	$	57,900	$	—	$	—
Due after one year through five years	751,065		779,527		26,224		26,163
Due after five years through ten years	1,531,719		1,578,489		1,241,524		1,248,569
Due after ten years	1,763,146		1,774,150		756,967		758,248
Total debt securities	$	4,103,196	$	4,190,066	$	2,024,715	$	2,032,980

10

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, 2021
	(in thousands)
To secure public funds	$	492,636
To secure borrowings	100,289
Other securities pledged	187,276
Total securities pledged as collateral	$	780,201

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 Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
June 30, 2021	(in thousands)
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	807,523	$	(8,956)	$	23,308	$	(386)	$	830,831	$	(9,342)
Other asset-backed securities	232,155		(3,976)		55		—		232,210		(3,976)
State and municipal securities	223,105		(2,443)		1,647		(15)		224,752		(2,458)
U.S. government agency and government-sponsored enterprise securities	150,218		(1,332)		—		(1)		150,218		(1,333)
Total	$	1,413,001	$	(16,707)	$	25,010	$	(402)	$	1,438,011	$	(17,109)
December 31, 2020
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	575,329	$	(3,728)	$	18,527	$	(815)	$	593,856	$	(4,543)
Other asset-backed securities	143,764		(2,076)		70		—		143,834		(2,076)
State and municipal securities	86,471		(592)		—		—		86,471		(592)
U.S. government agency and government-sponsored enterprise securities	74,943		(57)		—		—		74,943		(57)
Total	$	880,507	$	(6,453)	$	18,597	$	(815)	$	899,104	$	(7,268)

11

Debt securities available for sale

At June 30, 2021, there were 77 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, 2021.

At June 30, 2021, there were 18 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, 2021.

At June 30, 2021, there were 66 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, 2021, 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, 2021.

At June 30, 2021, there were nine 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, 2021.

Equity Securities without Readily Determinable Fair Values

Visa Class B Restricted Shares

In 2008, the Company received Visa Class B restricted shares as part of Visa’s initial public offering. These shares are transferable only under limited circumstances until they can be converted into publicly traded Visa Class A common shares. This conversion will not occur until the settlement of certain litigation which is indemnified by Visa members, including the Company. Visa funded an escrow account from its initial public offering to settle these litigation claims. Should this escrow account not be sufficient to cover these litigation claims, Visa is entitled to fund additional amounts to the escrow account by reducing each member bank’s Visa Class B conversion ratio to unrestricted Visa Class A shares.

During the second quarter of 2020, the Company sold 17,360 shares of Visa Class B restricted stock, which resulted in an observable market price. As a result, the Company adjusted the carrying value of its remaining Visa Class B restricted shares upward to this observable market price. At June 30, 2021, the Company owned 77,683 Visa Class B shares, which had a carrying value of $13.4 million.

12

4.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, 2021		December 31, 2020
	(dollars in thousands)
Commercial loans:
Commercial real estate	$	4,101,071	$	4,062,313
Commercial business	3,738,288		3,597,968
Agriculture	797,580		779,627
Construction	300,303		268,663
Consumer loans:
One-to-four family residential real estate	724,151		683,570
Other consumer	31,723		35,519
Total loans	9,693,116		9,427,660
Less: Allowance for credit losses	(142,988)		(149,140)
Total loans, net	$	9,550,128	$	9,278,520

At June 30, 2021 and December 31, 2020, 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 and Idaho.

At June 30, 2021 and December 31, 2020, $3.56 billion and $3.46 billion of commercial and residential real estate loans were pledged as collateral on FHLB advances and additional borrowing capacity. The Company has also pledged $200.3 million and $200.4 million of commercial loans to the FRB for additional borrowing capacity at June 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020, accrued interest receivable for loans was $33.1 million and $37.8 million, respectively. The Company does not measure an allowance for credit losses for accrued interest receivable.

13

The following is an aging of the recorded investment of the loan portfolio at the dates presented:

	Current Loans		30 - 59 Days Past Due		60 - 89 Days Past Due		Greater than 90 Days Past Due		Total Past Due		Nonaccrual Loans		Total Loans
June 30, 2021	(in thousands)
Commercial loans:
Commercial real estate	$	4,089,659	$	8,244	$	149	$	—	$	8,393	$	3,019	$	4,101,071
Commercial business	3,724,202		2,351		990		—		3,341		10,745		3,738,288
Agriculture	785,071		2,537		938		—		3,475		9,034		797,580
Construction	300,303		—		—		—		—		—		300,303
Consumer loans:
One-to-four family residential real estate	720,854		775		1,343		—		2,118		1,179		724,151
Other consumer	31,658		20		1		—		21		44		31,723
Total	$	9,651,747	$	13,927	$	3,421	$	—	$	17,348	$	24,021	$	9,693,116
	Current Loans		30 - 59 Days Past Due		60 - 89 Days Past Due		Greater than 90 Days Past Due		Total Past Due		Nonaccrual Loans		Total Loans
December 31, 2020	(in thousands)
Commercial loans:
Commercial real estate	$	4,037,309	$	17,292	$	—	—		$	17,292	$	7,712	$	4,062,313
Commercial business	3,578,905		1,282		4,559		—		5,841		13,222		3,597,968
Agriculture	767,102		911		—		—		911		11,614		779,627
Construction	268,304		—		142		—		142		217		268,663
Consumer loans:
One-to-four family residential real estate	677,627		2,283		1,659		—		3,942		2,001		683,570
Other consumer	35,450		24		5		—		29		40		35,519
Total	$	9,364,697	$	21,792	$	6,365	$	—	$	28,157	$	34,806	$	9,427,660

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. In addition, the risk rating on loans modified in association with the CARES Act or Interagency guidance did not change. These loans are not considered past due until after the deferral period is over and scheduled payments resume. Accrued interest on these COVID-19 modified loans is due, in full, when the deferral period ends. The credit quality of these loans will be reevaluated after the deferral period ends.

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.

14

The following table summarizes written-off interest on nonaccrual loans for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	(in thousands)
Commercial loans	$	212	$	665	$	424	$	1,448
Consumer loans	2		8		9		13
Total	$	214	$	673	$	433	$	1,461

The following summarizes the amortized cost of nonaccrual loans for which there was no related ACL for the periods indicated:

	June 30, 2021		December 31, 2020
	(in thousands)
Commercial loans:
Commercial real estate	$	942	$	6,393
Commercial business	6,125		6,382
Agriculture	6,744		8,136
Total	$	13,811	$	20,911

The following is an analysis of loans classified as TDR for the periods indicated:

	Three Months Ended June 30, 2021					Three Months Ended June 30, 2020
	Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
	(dollars in thousands)
Commercial loans:
Commercial business	4	$	1,757	$	1,757	4	$	1,690	$	1,690
Consumer loans:
One-to-four family residential real estate	—	—		—		1	128		128
Total	4	$	1,757	$	1,757	5	$	1,818	$	1,818

	Six Months Ended June 30, 2021					Six Months Ended June 30, 2020
	Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
	(dollars in thousands)
Commercial loans:
Commercial real estate	1	$	628	$	628	—	$	—	$	—
Commercial business	11	2,600		2,600		6	1,962		1,962
Agriculture	—	—		—		1	895		895
Consumer loans:
One-to-four family residential real estate	2	140		140		2	196		196
Total	14	$	3,368	$	3,368	9	$	3,053	$	3,053

15

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 $988 thousand of additional funds on loans classified as TDR as of June 30, 2021. The Company had $651 thousand of such commitments at December 31, 2020. The Company had no loans classified as TDR that defaulted within 12 months of being classified as TDR during the three months and six months ended June 30, 2021 and 2020.

Financial institutions are required to maintain records of the volume of loans involved in modifications to which troubled debt restructuring relief is applicable. At June 30, 2021, the Company had 10 short–term deferments on $40.7 million of loans, gross of unearned income. These short–term deferments are not classified as TDRs and will not be reported as past due provided that they are performing in accordance with the modified terms.

The Company offered PPP loans to provide financial support to small and medium-size businesses to cover payroll and certain other expenses during the COVID-19 pandemic. The PPP was established by the CARES Act and is implemented by the U.S. SBA with support from the U.S. Department of Treasury. The program, which was amended by the Paycheck Protection Flexibility Act of 2020, provides small businesses with funds to pay up to 24 weeks of payroll costs including benefits, as well as interest on mortgages, rent and utilities. Funds are provided to small businesses in the form of loans that will be fully forgiven when used for permitted purposes and when at least 60% of the funds are used for payroll costs and applicable employment levels are maintained in accordance with the requirements of the amended PPP. At June 30, 2021, we had $691.9 million of PPP loans outstanding, which are included in commercial business loans.

5.Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit

The ACL is determined through quarterly assessments of expected credit losses within the loan portfolio and is deducted from the loan’s amortized cost basis to present the net amount of loans expected to be collected. 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 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.

16

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 foreclosure is probable. 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 loans measured on an individual basis, 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 (Recapture)		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 (Recapture)		Ending Balance
Six Months Ended June 30, 2021	(in thousands)
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

17

	Beginning Balance		Charge-offs		Recoveries		Provision (Recapture)		Ending Balance
Three Months Ended June 30, 2020	(in thousands)
Commercial loans:
Commercial real estate	$	37,122	$	—	$	13	$	13,098	$	50,233
Commercial business	45,570		(5,442)		811		12,247		53,186
Agriculture	11,085		—		1		3,782		14,868
Construction	8,845		—		235		(1,127)		7,953
Consumer loans:
One-to-four family residential real estate	17,659		—		422		5,630		23,711
Other consumer	1,644		(198)		130		19		1,595
Unallocated	149		—		—		(149)		—
Total	$	122,074	$	(5,640)	$	1,612	$	33,500	$	151,546

	Beginning Balance		Impact of Adopting ASC 326		Charge-offs		Recoveries		Provision (Recapture)		Ending Balance
Six Months Ended June 30, 2020	(in thousands)
Commercial loans:
Commercial real estate	$	20,340	$	7,533	$	(101)	$	27	$	22,434	$	50,233
Commercial business	30,292		762		(7,126)		1,671		27,587		53,186
Agriculture	15,835		(9,325)		(4,726)		42		13,042		14,868
Construction	8,571		(1,750)		—		677		455		7,953
Consumer loans:
One-to-four family residential real estate	7,435		4,237		(10)		704		11,345		23,711
Other consumer	883		778		(466)		254		146		1,595
Unallocated	612		(603)		—		—		(9)		—
Total	83,968		1,632		(12,429)		3,375		75,000		151,546

The $6.2 million decrease in the ACL at June 30, 2021 compared to the ACL at December 31, 2020 was primarily due to a slight improvement in the economic outlook, which remains impacted by the COVID-19 pandemic and its impact on our borrowers. Specifically regarding the forecast used in the June 30, 2021 estimate, management expects the forecasted national unemployment rate to return to pre-pandemic levels in 2023. Additionally, the commercial real estate index decline is expected to continue through 2021, followed by a slight increase in 2022. The home price index is projected to moderate over the forecast period and real GDP growth is projected to continue to be above average during this time. 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, 2021 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,
	2021		2020		2021		2020
	(in thousands)
Beginning balance	$	9,800	$	6,000	$	8,300	$	3,430
Impact of adopting ASC 326	—		—		—		1,570
Net changes in the allowance for unfunded commitments and letters of credit	200		2,800		1,700		3,800
Ending balance	$	10,000	$	8,800	$	10,000	$	8,800

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.

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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 $100,000 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.

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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
	2021		2020		2019		2018		2017		Prior						Total (1)
June 30, 2021	(in thousands)
Commercial loans:
Commercial real estate
Pass	$	389,826	$	648,251	$	584,280	$	443,700	$	452,989	$	1,163,730	$	57,550	$	2,775	$	3,743,101
Special mention	1,875		10,168		58,636		21,408		26,722		60,889		—		2,195		181,893
Substandard	507		3,917		43,600		10,882		28,362		87,655		1,154		—		176,077
Total commercial real estate	$	392,208	$	662,336	$	686,516	$	475,990	$	508,073	$	1,312,274	$	58,704	$	4,970	$	4,101,071
Commercial business
Pass	$	881,501	$	585,999	$	325,418	$	245,432	$	163,134	$	316,525	$	980,429	$	16,876	$	3,515,314
Special mention	—		1,243		8,311		6,293		4,955		990		43,386		251		65,429
Substandard	336		5,808		24,959		29,854		22,175		31,814		41,282		1,317		157,545
Total commercial business	$	881,837	$	593,050	$	358,688	$	281,579	$	190,264	$	349,329	$	1,065,097	$	18,444	$	3,738,288
Agriculture
Pass	$	97,908	$	95,853	$	82,533	$	37,066	$	54,739	$	102,476	$	259,260	$	1,744	$	731,579
Special mention	109		4,593		738		325		64		—		4,526		—		10,355
Substandard	—		6,343		10,045		1,643		3,862		2,529		30,317		907		55,646
Total agriculture	$	98,017	$	106,789	$	93,316	$	39,034	$	58,665	$	105,005	$	294,103	$	2,651	$	797,580
Construction
Pass	$	115,216	$	101,292	$	19,352	$	6,699	$	3,448	$	4,897	$	30,302	$	304	$	281,510
Substandard	—		—		18,739		—		—		54		—		—		18,793
Total construction	$	115,216	$	101,292	$	38,091	$	6,699	$	3,448	$	4,951	$	30,302	$	304	$	300,303
Consumer loans:
One-to-four family residential real estate
Pass	$	130,355	$	146,145	$	58,921	$	49,106	$	23,838	$	81,118	$	227,230	$	622	$	717,335
Special mention	—		2,350		—		—		314		—		—		—		2,664
Substandard	—		81		1,201		239		172		2,132		172		155		4,152
Total one-to-four family real estate	$	130,355	$	148,576	$	60,122	$	49,345	$	24,324	$	83,250	$	227,402	$	777	$	724,151
Other consumer
Pass	$	4,289	$	3,294	$	2,270	$	1,789	$	671	$	1,122	$	18,006	$	192	$	31,633
Substandard	—		25		38		—		2		2		23		—		90
Total consumer	$	4,289	$	3,319	$	2,308	$	1,789	$	673	$	1,124	$	18,029	$	192	$	31,723
Total	$	1,621,922	$	1,615,362	$	1,239,041	$	854,436	$	785,447	$	1,855,933	$	1,693,637	$	27,338	$	9,693,116
Less:
Allowance for credit losses																	142,988
Loans, net																	$	9,550,128

__________

(1) Loans that are on short-term deferments are treated as Pass loans and will not be reported as past due provided that they are performing in accordance with the modified terms.

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													Revolving Loans Amortized Cost Basis		Revolving Loans Converted to Term Loans Amortized Cost Basis
	Term Loans
	Amortized Cost Basis by Origination Year
	2020		2019		2018		2017		2016		Prior						Total
December 31, 2020	(in thousands)
Commercial loans:
Commercial real estate
Pass	$	674,444	$	645,328	$	478,881	$	502,112	$	408,972	$	946,980	$	52,049	$	11,332	$	3,720,098
Special mention	3,348		39,374		21,285		30,232		46,197		50,115		5		2,139		192,695
Substandard	2,916		24,860		13,571		15,652		43,735		41,138		3,389		4,259		149,520
Total commercial real estate	$	680,708	$	709,562	$	513,737	$	547,996	$	498,904	$	1,038,233	$	55,443	$	17,730	$	4,062,313
Commercial business
Pass	$	1,087,400	$	366,435	$	324,360	$	199,010	$	218,313	$	214,677	$	1,000,725	$	11,540	$	3,422,460
Special mention	3,002		26,361		8,471		24,582		7,004		10,650		22,426		—		102,496
Substandard	3,625		7,376		11,061		5,905		6,396		3,743		32,134		2,772		73,012
Total commercial business	$	1,094,027	$	400,172	$	343,892	$	229,497	$	231,713	$	229,070	$	1,055,285	$	14,312	$	3,597,968
Agriculture
Pass	$	142,163	$	90,612	$	44,434	$	58,366	$	58,893	$	59,396	$	244,135	$	9,299	$	707,298
Special mention	—		90		285		33		—		—		85		13		506
Substandard	5,193		12,480		5,868		4,258		284		3,502		38,780		1,458		71,823
Total agriculture	$	147,356	$	103,182	$	50,587	$	62,657	$	59,177	$	62,898	$	283,000	$	10,770	$	779,627
Construction
Pass	$	134,693	$	66,974	$	10,066	$	3,498	$	763	$	1,805	$	29,323	$	3,753	$	250,875
Substandard	—		17,732		—		—		—		56		—		—		17,788
Total construction	$	134,693	$	84,706	$	10,066	$	3,498	$	763	$	1,861	$	29,323	$	3,753	$	268,663
Consumer loans:
One-to-four family real estate
Pass	$	161,021	$	77,756	$	62,696	$	29,737	$	20,889	$	78,098	$	243,325	$	3,655	$	677,177
Special mention	—		—		332		—		—		195		—		—		527
Substandard	—		849		227		1,166		344		1,968		1,005		307		5,866
Total one-to-four family real estate	$	161,021	$	78,605	$	63,255	$	30,903	$	21,233	$	80,261	$	244,330	$	3,962	$	683,570
Other consumer
Pass	$	5,548	$	3,109	$	3,886	$	989	$	244	$	1,060	$	19,911	$	474	$	35,221
Substandard	30		—		—		5		—		170		53		40		298
Total consumer	$	5,578	$	3,109	$	3,886	$	994	$	244	$	1,230	$	19,964	$	514	$	35,519
Total	$	2,223,383	$	1,379,336	$	985,423	$	875,545	$	812,034	$	1,413,553	$	1,687,345	$	51,041	$	9,427,660
Less:
Allowance for credit losses																	149,140
Loans, net																	$	9,278,520

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6.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,
	2021		2020		2021		2020
	(in thousands)
Balance, beginning of period	$	521	$	510	$	553	$	552
Transfers in	—		558		—		558
Valuation adjustments	(140)		—		(140)		—
Proceeds from sale of OREO property	—		(303)		(132)		(345)
Gain (loss) on sale of OREO, net	—		(18)		100		(18)
Balance, end of period	$	381	$	747	$	381	$	747

At June 30, 2021, there were no foreclosed residential real estate properties held as OREO. The recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process was $166 thousand.

7.Goodwill and Other Intangible Assets

In accordance with the Intangibles – Goodwill and Other topic of the FASB ASC, 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,
	2021		2020		2021		2020
	(in thousands)
Goodwill
Total goodwill	$	765,842	$	765,842	$	765,842	$	765,842
Other intangible assets, net
CDI:
Gross CDI balance at beginning of period	105,473		105,473		105,473		105,473
Accumulated amortization at beginning of period	(81,582)		(73,244)		(79,658)		(70,934)
CDI, net at beginning of period	23,891		32,229		25,815		34,539
CDI current period amortization	(1,852)		(2,210)		(3,776)		(4,520)
Total CDI, net at end of period	22,039		30,019		22,039		30,019
Intangible assets not subject to amortization	919		919		919		919
Other intangible assets, net at end of period	22,958		30,938		22,958		30,938
Total goodwill and other intangible assets at end of period	$	788,800	$	796,780	$	788,800	$	796,780

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The following table provides the estimated future amortization expense of our CDI for the remaining six months ending December 31, 2021 and the succeeding four years:

	Year ending December 31,
	(in thousands)
2021	$	3,488
2022	5,880
2023	4,552
2024	3,432
2025	2,415

8. Revolving Line of Credit

The Company has a $15.0 million short-term credit facility with an unaffiliated bank, for which the term was extended through May 26, 2022 as a result of an amendment executed during the second quarter of 2021. This facility has a variable interest rate and provides the Company additional liquidity, if needed, for various corporate activities including the repurchase of shares of Columbia Banking System, Inc. common stock. There was no outstanding balance at both June 30, 2021 and December 31, 2020. 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, 2021.

9.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 and 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.

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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, 2021 and 2020. 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, 2021 and December 31, 2020, the Bank had commitments to originate mortgage loans held for sale totaling $26.9 million and $31.9 million, respectively, and forward sales commitments of $21.5 million and $26.5 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, 2021 and December 31, 2020 was $605.1 million and $597.9 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, 2021			December 31, 2020			June 30, 2021			December 31, 2020
	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
	(in thousands)
Derivatives not designated as hedging instruments:
Interest rate lock commitments	Other assets	$	585	Other assets	$	1,096	Other liabilities	$	—	Other liabilities	$	—
Interest rate forward loan sales contracts	Other assets	$	—	Other assets	$	—	Other liabilities	$	23	Other liabilities	$	165
Interest rate swap contracts	Other assets	$	32,546	Other assets	$	46,184	Other liabilities	$	32,853	Other liabilities	$	46,637

The table below presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) for the periods indicated:

	Amount of Gain or (Loss) Recognized in Accumulated Other Comprehensive Income on Derivative				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,					Three Months Ended June 30,
	2021		2020			2021		2020
	(in thousands)
Interest rate collar	$	—	$	3,402	Interest income	$	2,602	$	2,190
	Six Months Ended June 30,					Six Months Ended June 30,
	2021		2020			2021		2020
Interest rate collar	$	—	$	26,825	Interest income	$	5,178	$	3,130

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.

24

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,
	2021		2020		2021		2020
	(in thousands)
Interest rate lock commitments	$	(340)	$	—	$	(511)	$	—
Interest rate forward loan sales contracts	(527)		—		143		—
Interest rate swap contracts	(40)		(473)		72		(473)
Total derivative gains (losses)	$	(907)	$	(473)	$	(296)	$	(473)

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, 2021	(in thousands)
Assets
Interest rate swap contracts	$	32,546	$	—	$	32,546	$	(430)	$	32,116
Liabilities
Interest rate swap contracts	$	32,853	$	—	$	32,853	$	(30,167)	$	2,686
Repurchase agreements	$	70,994	$	—	$	70,994	$	(70,994)	$	—
December 31, 2020
Assets
Interest rate swap contracts	$	46,184	$	—	$	46,184	$	—	$	46,184
Liabilities
Interest rate swap contracts	$	46,637	$	—	$	46,637	$	(46,637)	$	—
Repurchase agreements	$	73,859	$	—	$	73,859	$	(73,859)	$	—

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, 2021	(in thousands)
Class of collateral pledged for repurchase agreements
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	70,994	$	—	$	—	$	—	$	70,994
Gross amount of recognized liabilities for repurchase agreements									70,994
Amounts related to agreements not included in offsetting disclosure									$	—

25

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 $71.0 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.

10.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 2021 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, 2021 and December 31, 2020, the Company’s loan commitments amounted to $3.04 billion and $2.80 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 $24.7 million and $29.9 million at June 30, 2021 and December 31, 2020, respectively.

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.

11.Shareholders’ Equity

Dividends:

The following table summarizes year-to-date dividend activity:

Declared	Regular Cash Dividends Per Common Share		Record Date	Paid Date
January 28, 2021	$	0.28	February 10, 2021	February 24, 2021
April 29, 2021	$	0.28	May 12, 2021	May 26, 2021

Subsequent to quarter end, on July 29, 2021, the Company declared a regular quarterly cash dividend of $0.28 per common share payable on August 25, 2021 to shareholders of record at the close of business on August 11, 2021.

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.

Share Repurchase Program:

For the three and six months ended June 30, 2021, the Company did not purchase any common shares under the share repurchase program.

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12.Accumulated Other Comprehensive Income

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, 2021	(in thousands)
Beginning balance	$	60,569	$	(5,718)	$	22,877	$	77,728
Other comprehensive income (loss) 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
Three Months Ended June 30, 2020
Beginning balance	$	112,543	$	(3,894)	$	28,558	$	137,207
Other comprehensive income before reclassifications	42,860		—		2,611		45,471
Amounts reclassified from accumulated other comprehensive income (2)	—		79		(1,680)		(1,601)
Net current-period other comprehensive income	42,860		79		931		43,870
Ending balance	$	155,403	$	(3,815)	$	29,489	$	181,077
Six Months Ended June 30, 2021
Beginning balance	$	163,174	$	(5,833)	$	24,854	$	182,195
Other comprehensive income (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
Six Months Ended June 30, 2020
Beginning balance	$	33,038	$	(3,974)	$	11,303	$	40,367
Other comprehensive income before reclassifications	122,556		—		20,588		143,144
Amounts reclassified from accumulated other comprehensive income (2)	(191)		159		(2,402)		(2,434)
Net current-period other comprehensive income	122,365		159		18,186		140,710
Ending balance	$	155,403	$	(3,815)	$	29,489	$	181,077

__________

(1) All amounts are net of tax. Amounts in parentheses indicate debits.

(2) See following table for details about these reclassifications.

27

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
	2021		2020		2021		2020		Statement of Income
	(in thousands)
Unrealized gains on available for sale debt securities	$	314	$	—	$	314	$	249	Investment securities gains, net
Amortization of unrealized gains related to securities transfer	450		—		450		—		Loan interest income
	764		—		764		249		Total before tax
	(178)		—		(178)		(58)		Income tax provision
	$	586	$	—	$	586	$	191	Net of tax
Amortization of pension plan liability actuarial losses	$	(149)	$	(103)	$	(299)	$	(207)	Compensation and employee benefits
	(149)		(103)		(299)		(207)		Total before tax
	34		24		69		48		Income tax provision
	$	(115)	$	(79)	$	(230)	$	(159)	Net of tax
Unrealized gains from hedging instruments	$	2,602	$	2,190	$	5,178	$	3,130	Loans
	2,602		2,190		5,178		3,130		Total before tax
	(604)		(510)		(1,203)		(728)		Income tax provision
	$	1,998	$	1,680	$	3,975	$	2,402	Net of tax

13.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.

28

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.

29

The following table sets 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, 2021	(in thousands)
Assets
Debt securities available for sale:
U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	2,737,200	$	—	$	2,737,200	$	—
Other asset-backed securities	432,314		—		432,314		—
State and municipal securities	764,060		—		764,060		—
U.S. government agency and government-sponsored enterprise securities	256,492		—		256,492		—
Total debt securities available for sale	$	4,190,066	$	—	$	4,190,066	$	—
Loans held for sale	$	14,413	$	—	$	14,413	$	—
Other assets:
Interest rate lock commitments	$	585	$	—	$	—	$	585
Interest rate contracts	$	32,546	$	—	$	32,546	$	—
Liabilities
Other liabilities:
Interest rate forward loan sales contracts	$	23	$	—	$	23	$	—
Interest rate contracts	$	32,853	$	—	$	32,853	$	—

	Fair Value		Fair Value Measurements at Reporting Date Using
			Level 1		Level 2		Level 3
December 31, 2020	(in thousands)
Assets
Debt securities available for sale:
U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	3,814,387	$	—	$	3,814,387	$	—
Other asset-backed securities	357,479		—		357,479		—
State and municipal securities	753,572		—		753,572		—
U.S. government agency and government-sponsored enterprise securities	284,696		—		284,696		—
Total debt securities available for sale	$	5,210,134	$	—	$	5,210,134	$	—
Loans held for sale	$	14,760	$	—	$	14,760	$	—
Other assets:
Interest rate lock commitments	$	1,096	$	—	$	—	$	1,096
Interest rate contracts	$	46,184	$	—	$	46,184	$	—
Liabilities
Other liabilities:
Interest rate forward loan sales contracts	$	165	$	—	$	165	$	—
Interest rate contracts	$	46,637	$	—	$	46,637	$	—

30

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, 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,
	2021		2020		2021		2020
	(in thousands)
Balance at the beginning of the period	$	925	$	—	$	1,096	$	—
Change included in earnings	2,134		—		3,844		—
Settlements	(2,474)		—		(4,355)		—
Balance at the end of the period	$	585	$	—	$	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 and equity securities without readily determinable fair value.

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.

Equity securities without readily determinable fair value - The Company measures equity securities without readily determinable fair values at cost less impairment (if any), plus or minus observable price changes from an identical or similar investment of the same issuer, with such changes recognized in earnings. Our equity securities without readily determinable fair values consist of 77,683 Visa Class B shares. These shares are currently subject to certain transfer restrictions and will be convertible into Visa Class A shares upon final resolution of certain litigation matters involving Visa. For additional information, please see Note 3 of this report.

OREO - OREO is real property that the Bank has taken ownership of 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.

31

The following table presents the carrying value of equity securities, without readily determinable fair values, still held as of June 30, 2021, that are measured under the measurement alternative and related adjustments recorded during the periods presented for those securities with observable price changes. These securities are included in the nonrecurring fair value tables when applicable price changes are observable.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
Equity securities without readily determinable fair values	(in thousands)
Carrying value, beginning of period	$	13,425	$	—	$	13,425	$	—
Upward carrying value changes	—		13,425		—		13,425
Carrying value, end of period	$	13,425	$	13,425	$	13,425	$	13,425

The following tables set forth information related to the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the current and prior year quarterly periods:

	Fair Value at June 30, 2021		Fair Value Measurements  at Reporting Date Using						Losses During the Three Months Ended June 30, 2021		Losses During the Six Months Ended 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 at June 30, 2020		Fair Value Measurements  at Reporting Date Using						Gains (Losses) During the Three Months Ended June 30, 2020		Gains (Losses) During the Six Months Ended June 30, 2020
			Level 1		Level 2		Level 3
	(in thousands)
Collateral dependent loans	$	7,976	$	—	$	—	$	7,976	$	(6,946)	$	(7,745)
Equity securities	$	13,425	$	—	$	—	$	13,425	$	13,425	$	13,425

The losses on collateral dependent loans disclosed above represent the amount of the allowance 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 fixed and intangible assets).

(2) Collateral consists of intangible assets, fixed assets and real estate.

	Fair Value at June 30, 2020		Valuation Technique	Unobservable Input	Range (Weighted Average) (1)
	(dollars in thousands)
Collateral dependent loans (2)	$	7,976	Fair Market Value of Collateral	Adjustment to Stated Value	0.00% - 100.00% (56.22%)

__________

(1) Discount applied to appraised value or stated value (in the case of accounts receivable, fixed assets and inventory).

(2) Collateral consists of cash, accounts receivable, fixed assets, inventory and real estate.

32

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, 2021
	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Assets
Cash and due from banks	$	218,649	$	218,649	$	218,649	$	—	$	—
Interest-earning deposits with banks	612,883		612,883		612,883		—		—
Debt securities available for sale	4,190,066		4,190,066		—		4,190,066		—
Debt securities held to maturity	2,024,715		2,032,980		—		2,032,980		—
FHLB stock	10,280		10,280		—		10,280		—
Loans held for sale	13,179		13,179		—		13,179		—
Loans	9,550,128		9,955,668		—		—		9,955,668
Interest rate contracts	32,546		32,546		—		32,546		—
Interest rate lock commitments	585		585		—		—		585
Liabilities
Time deposits	$	327,882	$	326,735	$	—	$	326,735	$	—
FHLB advances	7,386		8,878		—		8,878		—
Repurchase agreements	70,994		70,994		—		70,994		—
Subordinated debentures	35,000		35,171		—		35,171		—
Interest rate contracts	32,853		32,853		—		32,853		—
Interest rate forward loan sales contracts	23		23		—		23		—

	December 31, 2020
	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Assets
Cash and due from banks	$	218,899	$	218,899	$	218,899	$	—	$	—
Interest-earning deposits with banks	434,867		434,867		434,867		—		—
Debt securities available for sale	5,210,134		5,210,134		—		5,210,134		—
FHLB stock	10,280		10,280		—		10,280		—
Loans held for sale	26,481		26,481		—		26,481		—
Loans	9,278,520		9,720,592		—		—		9,720,592
Interest rate contracts	46,184		46,184		—		46,184		—
Interest rate lock commitments	1,096		1,096		—		—		1,096
Liabilities
Time deposits	$	338,845	$	338,815	$	—	$	338,815	$	—
FHLB advances and FRB borrowings	7,414		9,295		—		9,295		—
Repurchase agreements	73,859		73,859		—		73,859		—
Subordinated debentures	35,092		35,414		—		35,414		—
Interest rate contracts	46,637		46,637		—		46,637		—
Interest rate forward loan sales contracts	165		165		—		165		—

33

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, 2021						December 31, 2020
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)
$	14,413	$	14,050	$	363	$	14,760	$	14,252	$	508

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 and six months ended June 30, 2021, the Company recorded net decreases in fair value of $57 thousand and $145 thousand, respectively, representing the change in fair value reflected in earnings. For the three and six months ended June 30, 2020, there were no such loans held for sale under the mandatory delivery method. At June 30, 2021 and December 31, 2020, 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.

14.Earnings Per Common Share

The 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,
	2021		2020		2021		2020
	(in thousands except per share amounts)
Basic EPS:
Net income	$	55,039	$	36,582	$	106,892	$	51,210
Less: Earnings allocated to participating securities:
Nonvested restricted shares	70		139		227		325
Earnings allocated to common shareholders	$	54,969	$	36,443	$	106,665	$	50,885
Weighted average common shares outstanding	70,987		70,679		70,924		70,942
Basic earnings per common share	$	0.77	$	0.52	$	1.50	$	0.72
Diluted EPS:
Earnings allocated to common shareholders	$	54,969	$	36,443	$	106,665	$	50,885
Weighted average common shares outstanding	70,987		70,679		70,924		70,942
Dilutive effect of equity awards	177		32		155		39
Weighted average diluted common shares outstanding	71,164		70,711		71,079		70,981
Diluted earnings per common share	$	0.77	$	0.52	$	1.50	$	0.72
Potentially dilutive RSAs and RSUs that were not included in the computation of diluted EPS because to do so would be anti-dilutive	248		571		158		450

34

15.Revenue from Contracts with Customers

Revenue in the scope of Topic 606, Revenue from Contracts with Customers is measured based on the consideration specified in the contract with a customer and excludes amounts collected on behalf of third parties. The vast majority of the Company’s revenue is specifically outside the scope of Topic 606. For in-scope revenue, the following is a description of principal activities, separated by the timing of revenue recognition from which the Company generates its revenue from contracts with customers.

a.Revenue earned at a point in time - Examples of revenue earned at a point in time are ATM transaction fees, wire transfer fees, overdraft fees, interchange fees and foreign exchange transaction fees. Revenue is primarily based on the number and type of transactions and is generally derived from transactional information accumulated by our systems and is recognized immediately as the transactions occur or upon providing the service to complete the customer’s transaction. The Company is the principal in each of these contracts, with the exception of interchange fees, in which case we are acting as the agent and record revenue net of expenses paid to the principal.

b.Revenue earned over time - The Company earns revenue from contracts with customers in a variety of ways where the revenue is earned over a period of time - generally monthly. Examples of this type of revenue are deposit account maintenance fees, investment advisory fees, merchant revenue and safe deposit box fees. Revenue is generally derived from transactional information accumulated by our systems or those of third-parties and is recognized as the related transactions occur or services are rendered to the customer.

The Company recognizes revenue from contracts with customers when it satisfies its performance obligations. The Company’s performance obligations are typically satisfied as services are rendered and our contracts generally do not include multiple performance obligations. As a result, there are no contract balances as payments and services are rendered simultaneously. Payment is generally collected at the time services are rendered, monthly or quarterly. Unsatisfied performance obligations at the report date are not material to our Consolidated Financial Statements.

In certain cases, other parties are involved with providing products and services to our customers. If the Company is principal in the transaction (providing goods or services itself), revenues are reported based on the gross consideration received from the customer and any related expenses are reported gross in noninterest expense. If the Company is an agent in the transaction (arranging for another party to provide goods or services), the Company reports its net fee or commission retained as revenue.

Rebates, waivers and reversals are recorded as a reduction of the transaction price either when the revenue is recognized by the Company or at the time the rebate, waiver or reversal is earned by the customer.

Practical expedients

The Company applies the practical expedient in paragraph 606-10-32-18 and does not adjust the consideration from customers for the effects of a significant financing component if at contract inception the period between when the entity transfers the goods or services and when the customer pays for that good or service will be one year or less.

The Company pays sales commissions to its employees in accordance with certain incentive plans and in connection with obtaining certain contracts with customers. The Company applies the practical expedient in paragraph 340-40-25-4 and expenses such sales commissions when incurred if the amortization period of the asset the Company otherwise would have recognized is one year or less. Sales commissions are included in compensation and employee benefits expense.

For the Company’s contracts that have an original expected duration of one year or less, the Company uses the practical expedient in paragraph 606-10-50-14 and has not disclosed the amount of the transaction price allocated to unsatisfied performance obligations as of the end of each reporting period or when the Company expects to recognize this revenue.

35

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,
	2021		2020		2021		2020
	(in thousands)
Noninterest income:
Revenue from contracts with customers:
Deposit account and treasury management fees	$	6,701	$	6,092	$	13,059	$	13,880
Card revenue	4,773		3,079		8,506		6,597
Financial services and trust revenue	4,245		3,163		7,626		6,228
Total revenue from contracts with customers	15,719		12,334		29,191		26,705
Other sources of noninterest income	7,011		24,925		16,705		31,761
Total noninterest income	$	22,730	$	37,259	$	45,896	$	58,466

Item 2.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This discussion should be read in conjunction with the unaudited Consolidated Financial Statements of Columbia Banking System, Inc. (referred to in this report as “we”, “our”, “Columbia” and “the Company”) and notes thereto presented elsewhere in this report and with the December 31, 2020 audited Consolidated Financial Statements and its accompanying notes included in our Annual Report on Form 10-K. In the following discussion, unless otherwise noted, references to increases or decreases in average balances in items of income and expense for a particular period and balances at a particular date refer to the comparison with corresponding amounts for the period or date one year earlier.

36

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This quarterly report on Form 10-Q may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include, but are not limited to, statements about our plans, objectives, expectations and intentions that are not historical facts, and statements identified by words such as “expects,” “anticipates,” “intends,” “plans,” “believes,” “should,” “projects,” “seeks,” “estimates” or the negative version of those words or other comparable words or phrases of a future or forward-looking nature, as well as the continuing effects of the COVID-19 pandemic on the Company’s business, operations, financial performance and prospects. Forward-looking statements are based on current beliefs and expectations of management and are inherently subject to significant business, economic and competitive uncertainties and contingencies, many of which are beyond our control. In addition, forward-looking statements are subject to assumptions with respect to future business strategies and decisions that are subject to change. In addition to the factors set forth in the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in this report and the factors set forth in the section titled “Risk Factors” in the Company’s Form 10-K, and Quarterly Reports on Form 10-Q, the following factors, among others, could cause actual results to differ materially from the anticipated results expressed or implied by forward-looking statements:

•national and global economic conditions could be less favorable than expected or could have a more direct and pronounced effect on us than expected and adversely affect our ability to continue internal growth and maintain the quality of our earning assets;

•the markets where we operate and make loans could face challenges;

•the risks presented by the economy, which could adversely affect credit quality, collateral values, including real estate collateral, investment values, liquidity and loan originations and loan portfolio delinquency rates;

•the efficiencies and enhanced financial and operating performance we expect to realize from investments in personnel, acquisitions (including the pending acquisition of Bank of Commerce Holdings (“Bank of Commerce”)) and infrastructure may not be realized;

•the ability to complete the proposed acquisition of Bank of Commerce in a timely manner or at all because required regulatory, shareholder or other approvals and other conditions to closing are not received or satisfied on a timely basis or at all, or to complete future acquisitions;

•the ability to successfully integrate Bank of Commerce if the acquisition is completed, or to integrate future acquired entities;

•interest rate changes could significantly reduce net interest income and negatively affect asset yields and funding sources;

•the effect of the discontinuation or replacement of LIBOR;

•results of operations following strategic expansion, including the impact of acquired loans on our earnings, could differ from expectations;

•changes in the scope and cost of FDIC insurance and other coverages;

•changes in accounting policies or procedures as may be required by the FASB or other regulatory agencies could materially affect our financial statements and how we report those results, and expectations and preliminary analysis relating to how such changes will affect our financial results could prove incorrect;

•changes in laws and regulations affecting our businesses, including changes in the enforcement and interpretation of such laws and regulations by applicable governmental and regulatory agencies;

•increased competition among financial institutions and nontraditional providers of financial services;

•continued consolidation in the Northwest financial services industry resulting in the creation of larger financial institutions that have greater resources could change the competitive landscape;

•the goodwill we have recorded in connection with acquisitions could become impaired, which may have an adverse impact on our earnings and capital;

•our ability to identify and address cyber-security risks, including security breaches, “denial of service attacks,” “hacking” and identity theft;

•any material failure or interruption of our information and communications systems;

•inability to keep pace with technological changes;

•our ability to effectively manage credit risk, interest rate risk, market risk, operational risk, legal risk, liquidity risk and regulatory and compliance risk;

•failure to maintain effective internal control over financial reporting or disclosure controls and procedures;

•the effect of geopolitical instability, including wars, conflicts and terrorist attacks;

•our profitability measures could be adversely affected if we are unable to effectively manage our capital;

•natural disasters, including earthquakes, tsunamis, flooding, fires and other unexpected events;

•the effect of COVID-19 and other infectious illness outbreaks that may arise in the future, which has created significant impacts and uncertainties in U.S. and global markets;

37

•changes in governmental policy and regulation, including measures taken in response to economic, business, political and social conditions, including with regard to COVID-19; and

•the effects of any damage to our reputation resulting from developments related to any of the items identified above.

You should take into account that forward-looking statements speak only as of the date of this report. Given the described uncertainties and risks, we cannot guarantee our future performance or results of operations and you should not place undue reliance on forward-looking statements. We undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required under federal securities laws.

CRITICAL ACCOUNTING POLICIES

Management has identified the accounting policies related to the ACL, business combinations and the valuation and recoverability of goodwill as critical to an understanding of our financial statements. These policies and related estimates are discussed in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” under the headings “Allowance for Credit Losses,” “Business Combinations” and “Valuation and Recoverability of Goodwill” in our 2020 Annual Report on Form 10-K. There have not been any material changes in our critical accounting policies as compared to those disclosed in our 2020 Annual Report on Form 10-K.

RESULTS OF OPERATIONS

Our results of operations are dependent to a large degree on our net interest income. We also generate noninterest income from our broad range of products and services including treasury management, wealth management and debit and credit cards. Our operating expenses consist primarily of compensation and employee benefits, occupancy, data processing and software and legal and professional fees. Like most financial institutions, our interest income and cost of funds are affected significantly by general economic conditions, particularly changes in market interest rates, and by government policies and actions of regulatory authorities.

Earnings Summary

Comparison of current quarter to prior year period

The Company reported net income for the second quarter of $55.0 million or $0.77 per diluted common share, compared to $36.6 million or $0.52 per diluted common share for the second quarter of 2020. Net interest income for the three months ended June 30, 2021 was $125.5 million, an increase of $3.6 million from the prior year period. The increase was primarily a result of an increase in interest income from securities and a reduction in interest expense on FHLB advances and deposits, partially offset by a decline in interest income on loans.

The provision for credit losses for the second quarter of 2021 was a recapture of $5.5 million compared to a provision of $33.5 million for the second quarter of 2020. The decrease in provision expense for the second quarter of 2021 compared to the second quarter of 2020 was principally the result of an improved economic forecast as the second quarter of 2020 was at the beginning of the COVID-19 pandemic and the economy is now recovering from the COVID-19 pandemic.

Noninterest income for the current quarter was $22.7 million, a decrease of $14.5 million from the prior year period. The decrease was principally due to the prior year period including a $16.4 million gain from the sale and upward adjustment to the carrying value of the Visa Class B restricted shares to the market price, partially offset by an increase in card revenue.

Total noninterest expense for the quarter ended June 30, 2021 was $84.1 million, an increase of $3.3 million from the prior year period. This increase was primarily driven by higher compensation and employee benefits expense partially offset by a decrease in other noninterest expense.

Comparison of current year-to-date to prior year period

The Company reported net income for the six months ended June 30, 2021 of $106.9 million or $1.50 per diluted common share, compared to $51.2 million or $0.72 per diluted common share for the same period in 2020. Net interest income for the six months ended June 30, 2021 was $249.5 million, an increase of $5.2 million from the prior year period. The drivers for the first six months of 2021 were similar to the drivers for the quarterly comparison above. The increase was primarily a result of an increase in interest income from securities and a reduction in interest expense on FHLB advances and deposits, partially offset by a decline in interest income from loans.

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The provision for credit losses for the six months ended June 30, 2021 was a recapture of $6.3 million compared to a provision of $75.0 million for the first six months of 2020. The decrease in the provision for the first six months of 2021 compared to the same period in 2020 was due to an improved economic forecast as the second quarter of 2020 was at the beginning of the COVID-19 pandemic and the economy is now recovering from the COVID-19 pandemic.

Noninterest income for the six months ended June 30, 2021 was $45.9 million, a decrease of $12.6 million from the prior year period. The decrease was primarily due to the prior year period including a $16.4 million gain from the sale and upward adjustment to the carrying value of the Visa Class B restricted shares to the market price, partially offset by an increase in card revenue.

For the six months ended June 30, 2021, noninterest expense was $167.7 million, an increase of $2.6 million from $165.1 million for the same period in 2020. The increase from the prior year period was most attributable to an increase in compensation and employee benefits expenses and regulatory premiums, partially offset by a decrease in other noninterest expense.

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Net Interest Income

The following table sets forth the average balances of all major categories of interest-earning assets and interest-bearing liabilities, the total dollar amounts of interest income on interest-earning assets and interest expense on interest-bearing liabilities, the average yield earned on interest-earning assets and average cost of interest-bearing liabilities by category and, in total, net interest income and net interest margin:

	Three Months Ended June 30,						Three Months Ended June 30,
	2021						2020
	Average Balances		Interest Earned / Paid		Average Rate		Average Balances		Interest Earned / Paid		Average Rate
	(dollars in thousands)
ASSETS
Loans, net (1)(2)	$	9,664,169	$	100,908	4.19	%	$	9,546,099	$	106,737	4.50	%
Taxable securities	5,291,380		24,750		1.88	%	3,189,805		18,343		2.31	%
Tax exempt securities (2)	623,458		3,577		2.30	%	401,888		2,857		2.86	%
Interest-earning deposits with banks	597,321		159		0.11	%	519,927		136		0.11	%
Total interest-earning assets	16,176,328		129,394		3.21	%	13,657,719		128,073		3.77	%
Other earning assets	244,181						234,019
Noninterest-earning assets	1,249,971						1,256,750
Total assets	$	17,670,480					$	15,148,488
LIABILITIES AND SHAREHOLDERS’ EQUITY
Money market accounts	3,632,383		692		0.08	%	2,939,657		974		0.13	%
Interest-bearing demand	1,546,247		286		0.07	%	1,213,182		339		0.11	%
Savings accounts	1,318,837		45		0.01	%	976,785		38		0.02	%
Interest-bearing public funds, other than certificates of deposit	702,967		245		0.14	%	559,256		393		0.28	%
Certificates of deposit	329,938		158		0.19	%	348,227		350		0.40	%
Total interest-bearing deposits	7,530,372		1,426		0.08	%	6,037,107		2,094		0.14	%
FHLB advances and FRB borrowings	7,395		72		3.91	%	407,035		1,796		1.77	%
Subordinated debentures	35,030		468		5.36	%	35,207		468		5.35	%
Other borrowings and interest-bearing liabilities	45,832		19		0.17	%	34,663		23		0.27	%
Total interest-bearing liabilities	7,618,629		1,985		0.10	%	6,514,012		4,381		0.27	%
Noninterest-bearing deposits	7,529,034						6,183,308
Other noninterest-bearing liabilities	210,038						196,819
Shareholders’ equity	2,312,779						2,254,349
Total liabilities & shareholders’ equity	$	17,670,480					$	15,148,488
Net interest income (tax equivalent)			$	127,409					$	123,692
Net interest margin (tax equivalent)					3.16	%					3.64	%

__________

(1)Nonaccrual loans have been included in the tables as loans carrying a zero yield. Amortized net deferred loan fees and net unearned discounts on acquired loans were included in the interest income calculations. The amortization of net deferred loan fees was $6.4 million and $5.1 million for the three months ended June 30, 2021 and 2020, respectively. The incremental accretion income on acquired loans was $856 thousand and $1.7 million for the three months ended June 30, 2021 and 2020, respectively.

(2)Tax-exempt income is calculated on a tax equivalent basis. The tax equivalent yield adjustment to interest earned on loans was $1.2 million for both the three months ended June 30, 2021 and 2020. The tax equivalent yield adjustment to interest earned on tax exempt securities was $751 thousand and $600 thousand for the three months ended June 30, 2021 and 2020, respectively.

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The following table sets forth the average balances of all major categories of interest-earning assets and interest-bearing liabilities, the total dollar amounts of interest income on interest-earning assets and interest expense on interest-bearing liabilities, the average yield earned on interest-earning assets and average cost of interest-bearing liabilities by category and, in total, net interest income and net interest margin:

	Six Months Ended June 30,						Six Months Ended June 30,
	2021						2020
	Average Balances		Interest Earned / Paid		Average Rate		Average Balances		Interest Earned / Paid		Average Rate
	(dollars in thousands)
ASSETS
Loans, net (1)(2)	$	9,625,790	$	202,385	4.24	%	$	9,180,927	$	215,402	4.72	%
Taxable securities	4,959,620		47,566		1.93	%	3,199,458		39,431		2.48	%
Tax exempt securities (2)	614,841		7,069		2.32	%	405,673		5,771		2.86	%
Interest-earning deposits with banks	599,689		311		0.10	%	286,577		277		0.19	%
Total interest-earning assets	15,799,940		$	257,331	3.28	%	13,072,635		$	260,881	4.01	%
Other earning assets	243,437						233,190
Noninterest-earning assets	1,239,855						1,266,235
Total assets	$	17,283,232					$	14,572,060
LIABILITIES AND SHAREHOLDERS’ EQUITY
Money market accounts	3,542,068		1,391		0.08	%	2,786,794		2,702		0.19	%
Interest-bearing demand	1,498,211		551		0.07	%	1,169,436		823		0.14	%
Savings accounts	1,270,403		85		0.01	%	937,030		81		0.02	%
Interest-bearing public funds, other than certificates of deposit	683,172		521		0.15	%	457,328		1,296		0.57	%
Certificates of deposit	333,111		363		0.22	%	359,567		834		0.47	%
Total interest-bearing deposits	7,326,965		2,911		0.08	%	5,710,155		5,736		0.20	%
FHLB advances and FRB borrowings	7,401		144		3.92	%	658,072		6,025		1.84	%
Subordinated debentures	35,051		936		5.39	%	35,230		936		5.34	%
Other borrowings and interest-bearing liabilities	49,740		42		0.17	%	41,514		159		0.77	%
Total interest-bearing liabilities	7,419,157		$	4,033	0.11	%	6,444,971		$	12,856	0.40	%
Noninterest-bearing deposits	7,311,385						5,711,242
Other noninterest-bearing liabilities	223,097						192,147
Shareholders’ equity	2,329,593						2,223,700
Total liabilities & shareholders’ equity	$	17,283,232					$	14,572,060
Net interest income (tax equivalent)			$	253,298					$	248,025
Net interest margin (tax equivalent)					3.23	%					3.82	%

__________

(1)Nonaccrual loans have been included in the table as loans carrying a zero yield. Amortized net deferred loan fees and net unearned discounts on acquired loans were included in the interest income calculations. The amortization of net deferred loan fees was $14.7 million and $7.5 million for the six months ended June 30, 2021 and 2020, respectively. The incremental accretion income on acquired loans was $1.9 million and $3.2 million for the six months ended June 30, 2021 and 2020, respectively.

(2)Tax-exempt income is calculated on a tax equivalent basis. The tax equivalent yield adjustment to interest earned on loans was $2.4 million and $2.5 million for the six months ended June 30, 2021 and 2020, respectively. The tax equivalent yield adjustment to interest earned on tax exempt securities was $1.5 million and $1.2 million for the six months ended June 30, 2021 and 2020, respectively.

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The following table sets forth the total dollar amount of change in interest income and interest expense. The changes have been segregated for each major category of interest-earning assets and interest-bearing liabilities into amounts attributable to changes in volume and changes in rates. Changes attributable to the combined effect of volume and interest rates have been allocated proportionately to the changes due to volume and the changes due to interest rates:

	Three Months Ended June 30, 2021 Compared to 2020 Increase (Decrease) Due to
	Volume		Rate		Total (1)
	(in thousands)
Interest Income
Loans, net	$	1,306	$	(7,135)	$	(5,829)
Taxable securities	10,327		(3,920)		6,407
Tax exempt securities	1,350		(630)		720
Interest-earning deposits with banks	21		2		23
Interest income	$	13,004	$	(11,683)	$	1,321
Interest Expense
Deposits:
Money market accounts	$	194	$	(476)	$	(282)
Interest-bearing demand	79		(132)		(53)
Savings accounts	12		(5)		7
Interest-bearing public funds, other than certificates of deposit	84		(232)		(148)
Certificates of deposit	(17)		(175)		(192)
Total interest on deposits	352		(1,020)		(668)
FHLB advances and FRB borrowings	(2,723)		999		(1,724)
Other borrowings and interest-bearing liabilities	27		(31)		(4)
Interest expense	$	(2,344)	$	(52)	$	(2,396)

__________

(1)The change in interest not due solely to volume or rate has been allocated in proportion to the absolute dollar amount of the change in each.

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The following table sets forth the total dollar amount of change in interest income and interest expense. The changes have been segregated for each major category of interest-earning assets and interest-bearing liabilities into amounts attributable to changes in volume and changes in rates. Changes attributable to the combined effect of volume and interest rates have been allocated proportionately to the changes due to volume and the changes due to interest rates:

	Six Months Ended June 30, 2021 Compared to 2020 Increase (Decrease) Due to
	Volume		Rate		Total (1)
	(in thousands)
Interest Income
Loans, net	$	10,092	$	(23,109)	$	(13,017)
Taxable securities	18,264		(10,129)		8,135
Tax exempt securities	2,560		(1,262)		1,298
Interest earning deposits with banks	203		(169)		34
Interest income	$	31,119	$	(34,669)	$	(3,550)
Interest Expense
Deposits:
Money market accounts	596		(1,907)		(1,311)
Interest-bearing demand	190		(462)		(272)
Savings accounts	25		(21)		4
Interest-bearing public funds, other than certificates of deposit	452		(1,227)		(775)
Certificates of deposit	(57)		(414)		(471)
Total interest on deposits	1,206		(4,031)		(2,825)
FHLB advances and FRB borrowings	(9,089)		3,208		(5,881)
Other borrowings	40		(157)		(117)
Interest expense	$	(7,843)	$	(980)	$	(8,823)

__________

(1) The change in interest not due solely to volume or rate has been allocated in proportion to the absolute dollar amount of the change in each.

Comparison of current quarter to prior year period

Net interest income for the second quarter of 2021 was $125.5 million, up from $121.9 million for the same quarter in 2020. The increase was mainly due to an increase in interest income from securities and a reduction in interest expense on FHLB advances and deposits, partially offset by a decrease in interest income for loans. The increase in interest income from securities was due to higher average balances. The decrease in interest expense was due to lower average balances of FHLB advances and lower rates on deposits. The decline in interest income from loans was mainly due to lower average rates.

The Company’s net interest margin (tax equivalent) decreased to 3.16% in the second quarter of 2021, from 3.64% for the prior year period. This decrease was driven by lower average rates on loans and securities as well as a higher ratio of taxable securities to our overall earning assets. The Company’s operating net interest margin (tax equivalent)1 decreased to 3.15% from 3.64% during the second quarter of 2020. The decrease was due to the items previously noted for the decrease in the net interest margin.

Comparison of current year-to-date to prior year period

Net interest income for the six months ended June 30, 2021 was $249.5 million, relative to $244.3 million for the prior year period. The year-to-date comparison results were similar to the second quarter comparison results as deposit interest expense declined due to the lower rate environment while the decrease in interest expense on FHLB advances was due to lower average advance balances. The increase in interest income from securities was principally due to higher average balances. Partially offsetting these favorable changes to net interest income was a decline in interest income from loans due to the low rate environment.

1 Operating net interest margin (tax equivalent) is a non-GAAP financial measure. See the “Non-GAAP financial measures” section in this Management’s Discussion and Analysis

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The Company’s net interest margin (tax equivalent) decreased to 3.23% for the first six months of 2021, from 3.82% for the prior year period. As with the quarter comparison, the decrease in the Company’s net interest margin (tax equivalent) was driven by lower average rates on loans and securities as well as a higher ratio of taxable securities to our overall earning assets. The Company’s operating net interest margin (tax equivalent) for the six months ended June 30, 2021 was 3.22% compared to 3.82% for the six months ended June 30, 2020. The decrease was due to the items previously noted for the decrease in the net interest margin.

Provision for Credit Losses

Comparison of current quarter to prior year period

During the second quarter of 2021, the Company recorded a $5.5 million net provision recapture for credit losses compared to a $33.5 million net provision during the second quarter of 2020. The decrease in provision expense and resulting recapture for the second quarter of 2021 compared to the second quarter of 2020 was principally the result of an improved economic forecast as the second quarter of 2020 was at the beginning of the COVID-19 pandemic and the economy is now recovering from the COVID-19 pandemic.

The net provision recapture for credit losses recorded during the current quarter also reflected management’s ongoing assessment of the credit quality of the Company’s loan portfolio. Other factors affecting the provision include net charge-offs, credit quality migration, and the size and composition of the loan portfolio and changes in the economic environment during the second quarter of 2021. The amount of provision was calculated in accordance with the Company’s methodology for determining the ACL, discussed in Note 5 to the Consolidated Financial Statements in “Item 1. Financial Statements (unaudited)” of this report.

Comparison of current year-to-date to prior year period

The provision recapture for credit losses for the six months ended June 30, 2021 was $6.3 million compared to a net provision of $75.0 million during the same period in 2020. The increase in the provision for the first six months of 2021 was due to the same factors discussed above for the quarterly provision for credit losses. The amount of provision was calculated in accordance with the Company’s methodology for determining the ACL, discussed in Note 5 to the Consolidated Financial Statements in “Item 1. Financial Statements (unaudited)” of this report.

Noninterest Income

The following table presents the significant components of noninterest income and the related dollar and percentage change from period to period:

	Three Months Ended June 30,								Six Months Ended June 30,
	2021		2020		$ Change		% Change		2021		2020		$ Change		% Change
	(dollars in thousands)
Deposit account and treasury management fees	$	6,701	$	6,092	$	609	10	%	$	13,059	$	13,880	$	(821)	(6)	%
Card revenue	4,773		3,079		1,694		55	%	8,506		6,597		1,909		29	%
Financial services and trust revenue	4,245		3,163		1,082		34	%	7,626		6,228		1,398		22	%
Loan revenue	4,514		5,607		(1,093)		(19)	%	11,883		10,197		1,686		17	%
Bank owned life insurance	1,635		1,618		17		1	%	3,195		3,214		(19)		(1)	%
Investment securities gains, net	314		16,425		(16,111)		(98)	%	314		16,674		(16,360)		(98)	%
Other	548		1,275		(727)		(57)	%	1,313		1,676		(363)		(22)	%
Total noninterest income	$	22,730	$	37,259	$	(14,529)	(39)	%	$	45,896	$	58,466	$	(12,570)	(21)	%

Comparison of current quarter to prior year period

Noninterest income was $22.7 million for the second quarter of 2021, compared to $37.3 million for the same period in 2020. The decrease was principally due to the sale of 17,360 shares of Visa Class B restricted stock during the second quarter of 2020 for a gain of $3.0 million, which resulted in an observable market price. As a result, the Company wrote up its remaining 77,683 Visa Class B restricted shares to fair value resulting in a gain of $13.4 million, for a total gain of $16.4 million. Based on the existing transfer restriction and uncertainty regarding the outcome of Visa’s litigation that must be settled before the Visa Class B restricted shares may be converted into publicly traded Visa Class A common shares, the shares were previously carried at a zero-cost basis. This year-over-year decrease in investment securities gains was partially offset by an increase in card revenue, largely driven by interchange fees and merchant card services.

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Comparison of current year-to-date to prior year period

For the six months ended June 30, 2021, noninterest income was $45.9 million compared to $58.5 million for the same period in 2020, a decrease of $12.6 million. The decrease was primarily due to the $16.4 million gain from the sale and write-up of Visa Class B restricted shares to fair value during the second quarter of 2020. The decrease in investment securities gains was partially offset by an increase in card revenue, largely driven by interchange fees and merchant card services.

Noninterest Expense

The following table presents the significant components of noninterest expense and the related dollar and percentage change from period to period:

	Three Months Ended June 30,								Six Months Ended June 30,
	2021		2020		$ Change		% Change		2021		2020		$ Change		% Change
	(dollars in thousands)
Compensation and employee benefits	$	53,450	$	46,043	$	7,407	16	%	$	105,186	$	100,885	$	4,301	4	%
Occupancy	9,038		8,812		226		3	%	18,044		18,009		35		—	%
Data processing and software	7,402		7,981		(579)		(7)	%	15,853		15,080		773		5	%
Legal and professional fees	3,264		3,483		(219)		(6)	%	6,079		5,585		494		9	%
Amortization of intangibles	1,852		2,210		(358)		(16)	%	3,776		4,520		(744)		(16)	%
B&O taxes	1,490		1,244		246		20	%	2,749		1,868		881		47	%
Advertising and promotion	588		837		(249)		(30)	%	1,348		2,142		(794)		(37)	%
Regulatory premiums	1,112		1,034		78		8	%	2,217		1,068		1,149		108	%
Net cost (benefit) of operation of OREO	111		(200)		311		(156)	%	48		(188)		236		(126)	%
Other	5,809		9,389		(3,580)		(38)	%	12,375		16,135		(3,760)		(23)	%
Total noninterest expense	$	84,116	$	80,833	$	3,283	4	%	$	167,675	$	165,104	$	2,571	2	%

The following table shows the impact of the acquisition-related expenses for the periods indicated to the various components of noninterest expense:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
	(in thousands)
Acquisition-related expenses:
Legal and professional fees	$	510	$	—	$	510	$	—
Total impact of acquisition-related expense to noninterest expense (1)	$	510	$	—	$	510	$	—

__________

(1) The Company has entered into a merger agreement with respect to the proposed Bank of Commerce merger; however, completion of this transaction is pending as of the date of this filing.

Comparison of current quarter to prior year period

Noninterest expense was $84.1 million for the second quarter of 2021, an increase of $3.3 million from $80.8 million for the prior year period. This increase was mostly attributable to an increase in compensation and employee benefits expense partially offset by a decrease in other noninterest expense. The increase in compensation and employee benefits expense was due to higher labor costs related to the origination of PPP loans in the second quarter of 2020. These costs, rather than recognized in the period incurred, are capitalized and amortized as a reduction to interest income over the life of the loan. The decrease in other noninterest expense was the result of a larger provision for unfunded commitments during the prior year period.

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Comparison of current year-to-date to prior year period

For the six months ended June 30, 2021, noninterest expense was $167.7 million, compared to $165.1 million for the same period in 2020, an increase of $2.6 million. The increase from the prior year period was mostly attributable to an increase in compensation and employee benefits expenses and regulatory premiums, partially offset by a decrease in other noninterest expense. The largest increase related to compensation and employee benefits was incentives and commissions while the increase in regulatory premiums was the result of the prior year period including a Small Bank Assessment Credit related to our FDIC deposit insurance premiums. The decrease in other noninterest expense was the result of a larger provision for unfunded commitments during the prior year period.

The provision for unfunded loan commitments for the periods indicated are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	(in thousands)
Provision for unfunded loan commitments	$	200	$	2,800	$	1,700	$	3,800

Income Taxes

We recorded an income tax provision of $14.5 million for the second quarter of 2021, compared to a provision of $8.2 million for the same period in 2020, with effective tax rates of 21% and 18% for the second quarter of 2021 and 2020, respectively. For the six months ended June 30, 2021 and 2020, we recorded income tax provisions of $27.1 million and $11.4 million, respectively, with effective tax rates of 20% for the current year and 18% for the prior year period. Our effective tax rate remains lower than the statutory tax rate due to tax-exempt income from municipal securities, BOLI and certain loan receivables. For additional information, please refer to the Company’s annual report on Form 10-K for the year ended December 31, 2020.

FINANCIAL CONDITION

Total assets were $18.01 billion at June 30, 2021, an increase of $1.43 billion from December 31, 2020. Cash and cash equivalents increased $177.8 million. Loans increased $265.5 million during the first six months of 2021, which was primarily the result of new loan production, supplemented by PPP loans, partially offset by loan payments and a decrease in line utilization. Debt securities available for sale were $4.19 billion at June 30, 2021, a decrease of $1.02 billion from December 31, 2020 which was largely due to the Company transferring securities with a fair value of $2.01 billion from the available for sale classification to the held to maturity classification. Total liabilities were $15.68 billion as of June 30, 2021, an increase of $1.44 billion from December 31, 2020. The increase was primarily due to an increase in demand and other noninterest-bearing deposits driven by PPP loan funds being deposited into our clients’ deposit accounts at the Bank, stimulus funds being distributed by the federal government and reduced expenditures by consumers and business clients.

Investment Securities

At June 30, 2021, the Company’s investment portfolio primarily consisted of debt securities available for sale totaling $4.19 billion compared to $5.21 billion at December 31, 2020 and debt securities held to maturity of $2.02 billion at June 30, 2021. The decrease in the debt securities available for sale from year-end is due to a transfer of securities with a fair value of $2.01 billion from the available for sale classification to the held to maturity classification, $412.0 million in maturities, repayments and sales, a $105.5 million decline in unrealized gains and $17.9 million in premium amortization, partially offset by $1.53 billion in purchases. The increase in debt securities held to maturity from year-end is due to the $2.01 billion transfer of securities into the held to maturity classification and purchases of $22.9 million, partially offset by $8.7 million in maturities, repayments and sales and $1.6 million in premium amortization. The average duration of our debt securities available for sale was approximately 4 years and 9 months at June 30, 2021. The average duration of our debt securities held to maturity was approximately 5 years and 10 months at June 30, 2021. These durations take into account calls, where appropriate, and consensus prepayment speeds.

The investment securities are used by the Company as a component of its balance sheet management strategies. From time-to-time, securities may be sold to reposition the portfolio in response to strategies developed by the Company’s asset liability management committee. In accordance with our investment strategy, management monitors market conditions with a view to realize gains on its available for sale securities portfolio when prudent.

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The Company performs a quarterly assessment to determine whether a decline in fair value below amortized cost exists. Amortized cost includes adjustments made to the cost of an investment for accretion, amortization, collection of cash and previous credit losses recognized in earnings.

When the fair value of an available for sale debt security falls below the amortized cost basis, it is evaluated to determine if any of the decline in value is attributable to credit loss. Decreases in fair value attributable to credit loss would be recorded directly to earnings with a corresponding allowance for credit losses, limited by the amount that the fair value is less than the amortized cost basis. If the credit quality subsequently improves, the allowance would be reversed up to a maximum of the previously recorded credit losses. If the Company intends to sell an impaired available for sale debt security, or if it is more likely than not that the Company will be required to sell the security prior to recovering the amortized cost basis, the entire fair value adjustment would be immediately recognized in earnings with no corresponding allowance for credit losses.

At June 30, 2021, the market value of debt securities available for sale had a net unrealized gain of $86.9 million compared to a net unrealized gain of $212.6 million at December 31, 2020. The change in valuation was the result of fluctuations in market interest rates during the six months ended June 30, 2021, in addition to there being less securities classified as available for sale at June 30, 2021 than December 31, 2020 as a result of the aforementioned transfer to the held to maturity classification. At June 30, 2021, the Company had $1.44 billion of debt securities available for sale with gross unrealized losses of $17.1 million; however, we did not consider these investment securities to have an indicated credit loss.

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 and/or implicit guarantee of the U.S. government, are widely recognized as “risk free,” and have a long history of zero credit loss. Therefore, the Company did not record an allowance for credit losses for these securities as of June 30, 2021.

The following table sets forth our securities portfolio by type for the dates indicated:

	June 30, 2021		December 31, 2020
	(in thousands)
Debt securities available for sale:
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	2,737,200	$	3,814,387
Other asset-backed securities	432,314		357,479
State and municipal securities	764,060		753,572
U.S. government agency and government-sponsored enterprise securities	256,492		284,696
Total debt securities available for sale, at fair value	$	4,190,066	$	5,210,134
Debt securities held to maturity:
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	2,024,715	$	—
Total debt securities held to maturity, at amortized cost	$	2,024,715	$	—
Equity securities	13,425		13,425
Total investment securities	$	6,228,206	$	5,223,559

For further information on our investment portfolio and equity securities transactions, see Note 3 to the Consolidated Financial Statements in “Item 1. Financial Statements (unaudited)” of this report.

Credit Risk Management

The extension of credit in the form of loans or other credit substitutes to individuals and businesses is one of our principal business activities. Our policies, as well as 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.

In analyzing our existing portfolio, we review our consumer and residential loan portfolios by their performance as a pool of loans, since no single loan is individually significant or judged by its risk rating, size or potential risk of loss. In contrast, the monitoring process for the commercial business, real estate construction, and commercial real estate portfolios includes periodic reviews of individual loans with risk ratings assigned to each loan and performance judged on a loan-by-loan basis.

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We review these loans to assess the ability of our borrowers to service all interest and principal obligations and, as a result, the risk rating may be adjusted accordingly. In the event that full collection of principal and interest is not reasonably assured, the loan is appropriately downgraded and, if warranted, placed on nonaccrual status even though the loan may be current as to principal and interest payments. Additionally, we assess whether an individually measured allowance is required for collateral dependent nonaccrual loans with balances equal to or greater than $500,000 and with respect to which foreclosure is probable. For the individually measured collateral dependent nonaccrual loan, the allowance for credit losses is equal to the difference between amortized cost of the loan and the determined value of the collateral. However, if the determined value of the collateral is greater than the amortized cost of the loan, no allowance for credit losses will be added for these loans.

For additional discussion on our methodology in managing credit risk within our loan portfolio, see the “Allowance for Credit Losses” section in this Management’s Discussion and Analysis and Note 1 to the Consolidated Financial Statements in “Item 8. Financial Statements and Supplementary Data” of the Company’s 2020 Annual Report on Form 10-K.

Loan policies, credit quality criteria, portfolio guidelines and other controls are established under the guidance of our Chief Credit Officer and approved, as appropriate, by the Board of Directors. Credit Administration, together with the management loan committee, has the responsibility for administering the credit approval process. As another part of its control process, we use an internal credit review and examination function to provide reasonable assurance that loans and commitments are made and maintained as prescribed by our credit policies. Examinations are performed to ensure continued performance and proper risk assessment.

Loan Portfolio Analysis

Our wholly owned banking subsidiary Columbia State Bank is a full service commercial bank, which originates a wide variety of loans, and focuses its lending efforts on originating commercial real estate and commercial business loans. The following table sets forth our loan portfolio by type of loan for the dates indicated:

	June 30, 2021		% of Total		December 31, 2020		% of Total
	(dollars in thousands)
Commercial loans:
Commercial real estate	$	4,101,071	42.3	%	$	4,062,313	43.0	%
Commercial business	3,738,288		38.6	%	3,597,968		38.2	%
Agriculture	797,580		8.2	%	779,627		8.3	%
Construction	300,303		3.1	%	268,663		2.8	%
Consumer loans:
One-to-four family residential real estate	724,151		7.5	%	683,570		7.3	%
Other consumer	31,723		0.3	%	35,519		0.4	%
Total loans	$	9,693,116	100.0	%	$	9,427,660	100.0	%
Loans held for sale	$	13,179			$	26,481

Total loans increased $265.5 million from year-end 2020. This increase includes $543.3 million of new PPP loans as well as new non-PPP loan originations, partially offset by $502.9 million of PPP loan pay downs and forgiveness from the SBA as well as contractual payments and prepayments on non-PPP loans. The PPP loans were originated to provide financial support to small and medium-size businesses to cover payroll and certain other expenses during the COVID-19 pandemic. To further assist our borrowers, the Company also offered loan deferrals to support borrowers during the COVID-19 pandemic.

The following table provides additional detail related to the Company’s COVID-19 deferrals:

	December 31, 2020		Ended (1)		Re-deferral		New Deferral		June 30, 2021		% Change
	(dollars in thousands)
Number of deferrals	70		(73)		3		10		10		(85.7)	%
Balance of deferrals (2)	$	146,725	$	(135,870)	$	17,213	$	12,679	$	40,747	(72.2)	%

__________

1) Ended includes re-deferrals that have ended.

2) Balance of deferrals are gross of unearned income.

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The following table provides additional detail related to the net discount of acquired and purchased loans by acquisition:

	June 30, 2021		December 31, 2020
	(in thousands)
Acquisition:
Pacific Continental	$	7,051	$	8,442
Intermountain	953		1,090
West Coast	1,311		1,695
Other	(1,987)		957
Total net discount at period end	$	7,328	$	12,184

Commercial Real Estate Loans: Commercial real estate loans are secured by properties located within our primary market areas and typically, have loan-to-value ratios of 80% or lower at origination. Our underwriting standards for commercial and multifamily residential loans generally require that the loan-to-value ratio for these loans not exceed 75% of appraised value, cost, or discounted cash flow value, as appropriate, and that commercial properties maintain debt coverage ratios (net operating income divided by annual debt servicing) of 1.2 or better. However, underwriting standards can be influenced by competition and other factors. We endeavor to maintain the highest practical underwriting standards while balancing the need to remain competitive in our lending practices.

Commercial Business Loans: We are committed to providing competitive commercial lending in our primary market area. Management expects a continued focus within its commercial lending products and to emphasize, in particular, relationship banking with businesses and business owners.

Agriculture Loans: Agricultural lending includes agricultural real estate and production loans and lines of credit within our primary market area. We are committed to our Pacific Northwest communities offering seasonal and longer-term loans and operating lines of credit by lending officers with expertise in the agricultural communities we serve. Typical loan-to-value ratios on term loans can range from 55% to 80% depending upon the type of loan. Operating lines of credit require the borrower to provide a 20% to 25% equity investment. The debt coverage ratio is generally 1.25:1 or better on all term loans.

Construction Loans: We originate a variety of real estate construction loans. Underwriting guidelines for these loans vary by loan type but include loan-to-value limits, term limits and loan advance limits, as applicable. Our underwriting guidelines for commercial and multifamily residential real estate construction loans generally require that the loan-to-value ratio not exceed 75% and stabilized debt coverage ratios (net operating income divided by annual debt service) of 1.2 or better. As noted above, underwriting standards can be influenced by competition and other factors. However, we endeavor to maintain the highest practical underwriting standards while balancing the need to remain competitive in our lending practices.

One-to-four Family Residential Real Estate Loans: One-to-four family residential loans, including home equity loans and lines of credit, are secured by properties located within our primary market areas and, typically, have loan-to-value ratios of 80% or lower at origination.

Other Consumer Loans: Consumer loans include automobile loans, boat and recreational vehicle financing, and other miscellaneous personal loans.

Foreign Loans: The Company has 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 and Idaho.

For additional information on our loan portfolio, including amounts pledged as collateral on borrowings, see Note 4 to the Consolidated Financial Statements in “Item 1. Financial Statements (unaudited)” of this report.

Nonperforming Assets

Nonperforming assets consist of: (i) nonaccrual loans, which generally are loans placed on a nonaccrual basis when the loan becomes past due 90 days or when there are otherwise serious doubts about the collectability of principal or interest within the existing terms of the loan, (ii) OREO and (iii) OPPO, if applicable.

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The following table sets forth, at the dates indicated, information with respect to our nonaccrual loans and total nonperforming assets:

	June 30, 2021			December 31, 2020
	(dollars in thousands)
Nonperforming assets
Nonaccrual loans:
Commercial loans:
Commercial real estate	$	3,019		$	7,712
Commercial business	10,745			13,222
Agriculture	9,034			11,614
Construction	—			217
Consumer loans:
One-to-four family residential real estate	1,179			2,001
Other consumer	44			40
Total nonaccrual loans	24,021			34,806
OREO and OPPO	381			553
Total nonperforming assets	$	24,402		$	35,359
Loans, net of unearned income	$	9,693,116		$	9,427,660
Total assets	$	18,013,477		$	16,584,779
Nonperforming loans to period-end loans	0.25		%	0.37		%
Nonperforming assets to period-end assets	0.14		%	0.21		%

At June 30, 2021, nonperforming assets were $24.4 million, compared to $35.4 million at December 31, 2020. Nonperforming assets decreased $11.0 million during the six months ended June 30, 2021, primarily due to decreases in commercial real estate, commercial business and agriculture nonaccrual loans. For information on OREO, see Note 6 to the Consolidated Financial Statements in “Item 1. Financial Statements (unaudited)” of this report.

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Allowance for Credit Losses

The ACL is an accounting estimate of expected credit losses in our loan portfolio at the balance sheet date. The provision for credit losses is the expense recognized in the Consolidated Statements of Income to adjust the ACL to the levels deemed appropriate by management, as measured by the Company’s credit loss estimation methodologies. The allowance for unfunded commitments and letters of credit is maintained at a level believed by management to be sufficient to absorb estimated expected losses related to these unfunded credit facilities at the balance sheet date.

At June 30, 2021, our ACL was $143.0 million, or 1.48% of total loans (excluding loans held for sale). This compares with an ACL of $149.1 million, or 1.58% of total loans (excluding loans held for sale) at December 31, 2020 and an ACL of $151.5 million or 1.55% of total loans (excluding loans held for sale) at June 30, 2020. The decrease from year end was primarily due to a slight improvement in the economic outlook, which remains impacted by the COVID-19 pandemic and its impact on our borrowers. The ACL at June 30, 2021 does not include a reserve for the PPP loans as they are fully guaranteed by the SBA.

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The following table provides an analysis of the Company’s ACL at the dates and the periods indicated:

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
	(dollars in thousands)
Beginning Balance	$	148,294		$	122,074		$	149,140		$	83,968
Impact of adopting ASC 326	—			—			—			1,632
Charge-offs:
Commercial loans:
Commercial real estate	(316)			—			(316)			(101)
Commercial business	(971)			(5,442)			(4,310)			(7,126)
Agriculture	(122)			—			(122)			(4,726)
Consumer loans:
One-to-four family residential real estate	(146)			—			(146)			(10)
Other consumer	(385)			(198)			(512)			(466)
Total charge-offs	(1,940)			(5,640)			(5,406)			(12,429)
Recoveries:
Commercial loans:
Commercial real estate	16			13			52			27
Commercial business	874			811			4,088			1,671
Agriculture	5			1			17			42
Construction	521			235			567			677
Consumer loans:
One-to-four family residential real estate	503			422			554			704
Other consumer	215			130			276			254
Total recoveries	2,134			1,612			5,554			3,375
Net (charge-offs) recoveries	194			(4,028)			148			(9,054)
Provision (recapture) for credit losses	(5,500)			33,500			(6,300)			75,000
Ending balance	142,988			151,546			142,988			151,546
Total loans, net at end of period, excluding loans held for sale	$	9,693,116		$	9,771,898		$	9,693,116		$	9,771,898
ACL to period-end loans	1.48		%	1.55		%	1.48		%	1.55		%
Allowance for unfunded commitments and letters of credit
Beginning Balance	$	9,800		$	6,000		$	8,300		$	3,430
Impact of adopting ASC 326	—			—			—			1,570
Net changes in the allowance for unfunded commitments and letters of credit	200			2,800			1,700			3,800
Ending balance	$	10,000		$	8,800		$	10,000		$	8,800

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Liquidity and Sources of Funds

Our primary sources of funds are customer deposits. Additionally, we utilize advances from the FHLB, borrowings from the FRB, sweep repurchase agreements, subordinated debentures assumed in acquisitions and a revolving line of credit to supplement our funding needs. These funds, together with loan repayments, loan sales, retained earnings, equity and other borrowed funds are used to make loans, to acquire securities, meet deposit withdrawals and maturing liabilities, to acquire other assets and to fund continuing operations.

Deposit Activities

Our deposit products include a wide variety of transaction accounts, savings accounts and time deposit accounts. We have established a branch system to serve our consumer and business depositors. Deposits increased $1.48 billion from December 31, 2020. The second round of PPP loans during the six months ended June 30, 2021 had an impact on our deposits, as our clients deposited these funds into their accounts. In addition, management’s strategy for funding asset growth is to make use of public funds and brokered and other wholesale deposits on an as-needed basis. The Company participates in the CD Option of IntraFi Network Deposits program, which is a network that allows participating banks to offer extended FDIC deposit insurance coverage on time deposits. The Company also participates in a similar program to offer extended FDIC deposit insurance coverage on money market accounts. These extended deposit insurance programs are generally available only to existing customers and are not used as a means of generating additional liquidity. At June 30, 2021, brokered deposits, reciprocal money market accounts and other wholesale deposits (excluding public funds) totaled $759.4 million, or 4.9% of total deposits, compared to $605.9 million or 4.4% at year-end 2020. These deposits have varied maturities.

The following table sets forth the Company’s deposit base by type of product for the dates indicated:

	June 30, 2021				December 31, 2020
	Balance		% of Total		Balance		% of Total
	(dollars in thousands)
Demand and other noninterest-bearing	$	7,703,325	50.2	%	$	6,913,214	49.8	%
Money market	2,950,063		19.2	%	2,780,922		20.1	%
Interest-bearing demand	1,525,360		9.9	%	1,433,083		10.3	%
Savings	1,388,241		9.0	%	1,169,721		8.4	%
Interest-bearing public funds, other than certificates of deposit	720,553		4.7	%	656,273		4.7	%
Certificates of deposit, less than $250,000	193,080		1.3	%	201,805		1.5	%
Certificates of deposit, $250,000 or more	105,393		0.7	%	108,935		0.8	%
Certificates of deposit insured by the CD Option of IntraFi Network Deposits	24,409		0.2	%	23,105		0.2	%
Brokered certificates of deposit	5,000		—	%	5,000		—	%
Reciprocal money market accounts	730,008		4.8	%	577,804		4.2	%
Total deposits	$	15,345,432	100.0	%	$	13,869,862	100.0	%

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Borrowings

We rely on FHLB advances and FRB borrowings as another source of both short and long-term funding. FHLB advances and FRB borrowings are secured by investment securities, and residential, commercial and commercial real estate loans. At both June 30, 2021 and December 31, 2020, we had FHLB advances of $7.4 million.

We also utilize wholesale and retail repurchase agreements to supplement our funding sources. Our wholesale repurchase agreements are secured by mortgage-backed securities. At June 30, 2021 and December 31, 2020, we had deposit customer sweep-related repurchase agreements of $71.0 million and $73.9 million, respectively, which mature on a daily basis.

Subordinated debentures are another source of funding. The Company assumed $35.0 million in aggregate principal amount with its acquisition of Pacific Continental on November 1, 2017. These subordinated debentures, which are unsecured, are callable on September 30, 2021 and have a stated maturity date of June 30, 2026.

The Company has a $15.0 million short-term credit facility with an unaffiliated bank. This facility provides the Company additional liquidity, if needed, for various corporate activities including the repurchase of shares of Columbia Banking System, Inc. common stock. At both June 30, 2021 and December 31, 2020, there was no balance associated with this credit facility. 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, 2021.

Management anticipates we will continue to rely on FHLB advances, FRB borrowings, the short-term credit facility and wholesale and retail repurchase agreements in the future. We will use those funds primarily to make loans and purchase securities.

Contractual Obligations, Commitments & Off-Balance Sheet Arrangements

We are party to many contractual financial obligations, including repayments of borrowings, operating and equipment lease payments, off-balance sheet commitments to extend credit and investments in affordable housing partnerships. At June 30, 2021, we had commitments to extend credit of $3.07 billion compared to $2.83 billion at December 31, 2020.

Capital Resources

Shareholders’ equity at June 30, 2021 was $2.33 billion, compared to $2.35 billion at December 31, 2020. Shareholders’ equity was 13% and 14% of total period-end assets at June 30, 2021 and December 31, 2020, respectively.

Regulatory Capital

In July 2013, the federal bank regulators approved the Capital Rules (as discussed in our 2020 Annual Report on Form 10-K, “Item 1. Business—Supervision and Regulation and —Regulatory Capital Requirements”), which implement the Basel III capital framework and various provisions of the Dodd-Frank Act, which were fully phased in as of January 1, 2019. As of June 30, 2021, we and the Bank met all capital adequacy requirements under the Capital Rules.

FDIC regulations set forth the qualifications necessary for a bank to be classified as “well-capitalized,” primarily for assignment of FDIC insurance premium rates. Failure to qualify as “well-capitalized” can negatively impact a bank’s ability to expand and to engage in certain activities. The Company and the Bank qualified as “well-capitalized” at June 30, 2021 and December 31, 2020.

As part of its response to the impact of COVID-19, the U.S. federal regulatory agencies issued an interim final rule that provided the option to temporarily delay certain effects of CECL on regulatory capital for two years, followed by a three year transition period. The interim final rule allows bank holding companies and banks to delay for two years 100% of the day one impact of adopting CECL and 25% of the cumulative change in the reported allowance for credit losses since adopting CECL. The Company elected to adopt the interim final rule. As a result, certain capital ratios and amounts as of June 30, 2021 and December 31, 2020 exclude the impact of the increased allowance for credit losses related to the adoption of CECL.

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The following table presents the capital ratios and the capital conservation buffer, as applicable, for the Company and its banking subsidiary as of the dates presented below:

	Company				Columbia Bank
	June 30, 2021		December 31, 2020		June 30, 2021		December 31, 2020
CET1 risk-based capital ratio	12.97	%	12.88	%	12.85	%	13.08	%
Tier 1 risk-based capital ratio	12.97	%	12.88	%	12.85	%	13.08	%
Total risk-based capital ratio	14.47	%	14.45	%	14.04	%	14.33	%
Leverage ratio	8.67	%	8.86	%	8.63	%	9.08	%
Capital conservation buffer	6.47	%	6.45	%	6.04	%	6.33	%

Stock Repurchase Program

As described in our Annual Report on Form 10-K for the year ended December 31, 2020, our board of directors approved a stock repurchase program to repurchase up to 3.5 million shares, up to a maximum aggregate purchase price of $100.0 million. There were no share repurchases during the three or six months ended June 30, 2021.

Non-GAAP Financial Measures

The Company considers operating net interest margin (tax equivalent) to be a useful measurement as it more closely reflects the ongoing operating performance of the Company. Additionally, presentation of the operating net interest margin allows readers to compare certain aspects of the Company’s net interest margin to other organizations that may not have had significant acquisitions. Despite the usefulness of the operating net interest margin (tax equivalent) to the Company, there is no standardized definition for it and, as a result, the Company’s calculations may not be comparable with other organizations. The Company encourages readers to consider its Consolidated Financial Statements in their entirety and not to rely on any single financial measure.

The following table reconciles the Company’s calculation of the operating net interest margin (tax equivalent) to the net interest margin (tax equivalent) for the periods indicated:

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
	(dollars in thousands)
Operating net interest margin non-GAAP reconciliation:
Net interest income (tax equivalent) (1)	$	127,409		$	123,692		$	253,298		$	248,025
Adjustments to arrive at operating net interest income (tax equivalent):
Incremental accretion income on acquired loans	(856)			(1,675)			(1,911)			(3,166)
Premium amortization on acquired securities	532			975			1,052			2,102
Interest reversals on nonaccrual loans (2)	—			673			—			1,461
Operating net interest income (tax equivalent) (1)	$	127,085		$	123,665		$	252,439		$	248,422
Average interest earning assets	$	16,176,328		$	13,657,719		$	15,799,940		$	13,072,635
Net interest margin (tax equivalent) (1)	3.16		%	3.64		%	3.23		%	3.82		%
Operating net interest margin (tax equivalent) (1)	3.15		%	3.64		%	3.22		%	3.82		%

__________

(1) Tax-exempt interest income has been adjusted to a tax equivalent basis. The amount of such adjustment was an addition to net interest income of $1.9 million and $1.8 million for the three months ended June 30, 2021 and 2020, respectively, and an addition to net interest income of $3.8 million for both the six months ended June 30, 2021 and 2020.

(2) Beginning 2021, interest reversals on nonaccrual loans is no longer a component of this non-GAAP measure.

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Item 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate Sensitivity

We are exposed to interest rate risk, which is the risk that changes in prevailing interest rates will adversely affect assets, liabilities, capital, income and expenses at different times or in different amounts. Generally, there are four sources of interest rate risk as described below:

Repricing risk—Repricing risk is the risk of adverse consequences from a change in interest rates that arises because of differences in the timing of when those interest rate changes affect an institution’s assets and liabilities.

Basis risk—Basis risk is the risk of adverse consequences resulting from unequal changes in the spread between two or more rates for different instruments with the same maturity.

Yield curve risk—Yield curve risk is the risk of adverse consequences resulting from unequal changes in the spread between two or more rates for different maturities for the same instrument.

Option risk—In banking, option risks are known as borrower options to prepay loans and depositor options to make deposits, withdrawals, and early redemptions. Option risk arises whenever a bank’s products give customers the right, but not the obligation, to alter the quantity or the timing of cash flows. We are also exposed to option risk in callable bonds as the counterparty may call the bonds during a low rate environment resulting in reinvestment of the proceeds at lower yields. Option risk is also present in the investment portfolio as mortgage-backed securities could prepay.

Since our earnings are primarily dependent on our ability to generate net interest income, we actively monitor and manage the effects of adverse changes in interest rates on our results of operations. Management of our interest rate risk is overseen by our board of directors, which is responsible for establishing policies and interest rate limits and approving these policies and interest rate limits annually. These policies include our asset/liability management policy, which provides guidelines for controlling our exposure to interest rate risk. These guidelines direct management to assess the impact of changes in interest rates upon both earnings and capital. These guidelines also establish limits for interest rate risk sensitivity.

We maintain an Asset/Liability Management Committee which is responsible for developing, monitoring and reviewing asset/liability processes, interest rate risk exposures, strategies and tactics. The Asset/Liability Management Committee reports on a periodic basis to our board of directors. It is the responsibility of management to execute the approved policies, develop and implement risk management strategies and to report to the board of directors on a regular basis.

Interest Rate Risk Sensitivity

We use a number of measures to monitor and manage interest rate risk, including income simulations and interest sensitivity (gap) analysis. An income simulation model is the primary tool used to assess the direction and magnitude of changes in net interest income resulting from changes in interest rates. Basic assumptions in the model include prepayment speeds on mortgage-related assets, cash flows and maturities of other investment securities, loan and deposit volumes and pricing. These assumptions are inherently subjective and may not be realized and, as a result, actual results will differ from our projections. In addition, variances in the timing, magnitude and frequency of interest rate changes, overall market conditions including volumes and pricing, and changes in management strategies, among other factors, will also result in variances between the projected and actual results.

The following table summarizes the expected impact if interest rates gradually increased or decreased over a one or two year period, based on the results of the simulation model as of June 30, 2021:

	Year one				Year two
Change in basis points (bps)	Change in net interest income		% Change in net interest income		Change in net interest income		% Change in net interest income
	(dollars in thousands)
+200	$	1,728	0.38	%	$	32,192	7.18	%
-100	$	(6,787)	(1.48)	%	$	(27,064)	(6.03)	%

The projections are based on the current interest rate environment and we assume our balance sheet remains constant during the next two years. Short-term market interest rates are near historical lows. Loan interest rate indexes such as Prime and LIBOR are also near historical lows. Since we don’t assume negative interest rates, the downward repricing of Prime and LIBOR loans is more limited than during a higher interest rate environment. Our ability to reprice deposits downward is also limited given our low cost of funds.

56

The limited increase in net interest income in the first year of the rising interest rate scenario is mainly due to the ramp up period of the interest rate scenario combined with floating rate loans where the floor rate exceeds the fully indexed rate. In year two of this scenario, net interest income increases as yields on new loan production and investment security purchases rise faster than our funding costs and the existing floating rate loans increase from the floor level. The decrease in net interest income in the falling rate scenario is due to loan production and investment security purchases at rates lower than the existing portfolios combined with our inability to materially lower funding costs.

On January 23, 2019, the Company entered into an interest rate collar derivative transaction with a $500.0 million notional value based on one month LIBOR. 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 into interest income through February 2024 which is in line with the initial term of the interest rate collar. The gain will be amortized in this manner as long as the cash flows pertaining to the hedged item are expected to occur.

Net interest income sensitivity excludes the amortization of premiums, discounts and deferred fees on the existing loan portfolio although the amortization of the collar is included in loan interest income.

Item 4.CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

An evaluation was carried out under the supervision and with the participation of the Company’s management, including the CEO and CFO, of the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934). Based on that evaluation, the CEO and CFO have concluded that as of the end of the period covered by this report, our disclosure controls and procedures are effective in ensuring that the information required to be disclosed by us in the reports we file or submit under the Securities Exchange Act of 1934 is (i) accumulated and communicated to our management (including the CEO and CFO) to allow timely decisions regarding required disclosure, and (ii) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

Changes in Internal Control Over Financial Reporting

There was no change in our internal controls over financial reporting during our most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

57

PART II - OTHER INFORMATION

Item 1.LEGAL PROCEEDINGS

The Company and its subsidiaries are party to routine litigation arising in the ordinary course of business. Management believes that, based on information currently known to it, any liabilities arising from such litigation will not have a material adverse impact on the Company’s financial conditions, results of operations or cash flows.

Item 1A. RISK FACTORS

Refer to Item 1A of Part I of the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 for a discussion of risk factors relating to the Company’s business. The Company believes that there has been no material change in its risk factors as previously disclosed in the Company’s Form 10-K for the year ended December 31, 2020.

Item 2.UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

(a)Not applicable

(b)Not applicable

(c)The following table provides information about repurchases of common stock by the Company during the quarter ended June 30, 2021:

Period	Total Number of Common Shares Purchased (1)	Average Price Paid per Common Share		Total Number of Shares Purchased as Part of Publicly Announced Plan (2)	Maximum Number of Remaining Shares That May Yet Be Purchased Under the Plan (2)
4/1/2021 - 4/30/2021	1,037	$	45.07	—	3,500,000
5/1/2021 - 5/31/2021	645	44.48		—	3,500,000
6/1/2021 - 6/30/2021	—	—		—	3,500,000
	1,682	44.84		—

__________

(1) Common shares repurchased by the Company during the quarter consisted of cancellation of shares of common stock to pay the shareholders’ withholding taxes.

(2) As described in our Annual Report on Form 10-K for the year ended December 31, 2020, the board of directors approved a stock repurchase program to repurchase up to 3.5 million shares of its outstanding stock, up to a maximum aggregate purchase price of $100.0 million through December 31, 2021.

Item 3.DEFAULTS UPON SENIOR SECURITIES

None.

Item 4.MINE SAFETY DISCLOSURES

Not applicable.

Item 5.OTHER INFORMATION

None.

58

Item 6.EXHIBITS

2.1*	Agreement and Plan of Merger, dated as of June 23, 2021, by and between Columbia Banking System, Inc. and Bank of Commerce Holdings (1)
31.1+	Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2+	Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32+	Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS+	XBRL Instance Document - The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH+	XBRL Taxonomy Extension Schema
101.CAL+	XBRL Taxonomy Extension Calculation Linkbase
101.LAB+	XBRL Taxonomy Extension Label Linkbase
101.PRE+	XBRL Taxonomy Extension Presentation Linkbase
101.DEF+	XBRL Taxonomy Extension Definition Linkbase
104+	Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

_______

(1) Incorporated by reference to Exhibit 2.1 of the Company’s Current Report on Form 8-K filed June 23, 2021.

* Certain schedules (or similar attachments) have been omitted pursuant to Item 601(a)(5) or Item 601(b)(2) of Regulation S-K. The registrant agrees to furnish copies of such schedules (or similar attachments) to the SEC upon request.

+ Filed herewith

59

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Company has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		COLUMBIA BANKING SYSTEM, INC.
Date:	August 6, 2021	By	/s/ CLINT E. STEIN
			Clint E. Stein
			President and Chief Executive Officer (Principal Executive Officer)
Date:	August 6, 2021	By	/s/ AARON JAMES DEER
			Aaron James Deer
			Executive Vice President and Chief Financial Officer (Principal Financial Officer)
Date:	August 6, 2021	By	/s/ BROCK M. LAKELY
			Brock M. Lakely
			Senior Vice President and Chief Accounting Officer (Principal Accounting Officer)

60

EX-31.1

EXHIBIT 31.1

CERTIFICATION

I, Clint E. Stein, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Columbia Banking System, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ CLINT E. STEIN

Clint E. Stein
President and
Chief Executive Officer

Date: August 6, 2021

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, Aaron James Deer, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Columbia Banking System, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ AARON JAMES DEER

Aaron James Deer
Executive Vice President and
Chief Financial Officer

Date: August 6, 2021

EX-32

EXHIBIT 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Columbia Banking System, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Clint E. Stein, President and Chief Executive Officer, and Aaron James Deer, Executive Vice President and Chief Financial Officer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ CLINT E. STEIN

Clint E. Stein
President and
Chief Executive Officer
Columbia Banking System, Inc.

/s/ AARON JAMES DEER

Aaron James Deer
Executive Vice President and
Chief Financial Officer
Columbia Banking System, Inc.

Dated: August 6, 2021

XML

Document - shares	6 Months Ended
	Jun. 30, 2021	Jul. 31, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
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		71,767,227
Entity Central Index Key	0000887343
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false

XML

Consolidated Balance Sheets - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 218,649	$ 218,899
Interest-earning deposits with banks	612,883	434,867
Total cash and cash equivalents	831,532	653,766
Debt securities available for sale at fair value	4,190,066	5,210,134
Debt Securities, Held-to-Maturity, Amortized Cost	2,024,715	0
Equity Securities	13,425	13,425
FHLB stock at cost	10,280	10,280
Loans held for sale	13,179	26,481
Loans, net of unearned income	9,693,116	9,427,660
Less: Allowance for credit losses	142,988	149,140
Loans, net	9,550,128	9,278,520
Interest receivable	52,347	54,831
Premises and equipment, net	158,827	162,059
OREO	381	553
Goodwill	765,842	765,842
Other intangible assets, net	22,958	26,734
Other assets	379,797	382,154
Total assets	18,013,477	16,584,779
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing	7,703,325	6,913,214
Interest-bearing	7,642,107	6,956,648
Total deposits	15,345,432	13,869,862
FHLB advances	7,386	7,414
Securities sold under agreements to repurchase	70,994	73,859
Subordinated debentures	35,000	35,092
Other liabilities	221,419	250,945
Total liabilities	$ 15,680,231	$ 14,237,172
Shareholders' equity:
Preferred Stock, Authorized shares	2,000	2,000
Common Stock Authorized shares	115,000	115,000
Common Stock Shares Issued	73,926	73,782
Common Stock Issued value	$ 1,664,953	$ 1,660,998
Common Stock, Shares, Outstanding	71,742	71,598
Retained earnings	$ 642,018	$ 575,248
Accumulated other comprehensive income	$ 97,109	$ 182,195
Treasury Stock, Shares	2,184	2,184
Treasury Stock, Value	$ (70,834)	$ (70,834)
Total shareholders’ equity	2,333,246	2,347,607
Total liabilities and shareholders’ equity	$ 18,013,477	$ 16,584,779

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ / shares in Thousands, $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale, Amortized Cost	$ 4,103,196	$ 4,997,529
Debt Securities, Held-to-maturity, Fair Value	$ 2,032,980	$ 0
Preferred Stock, No Par Value	$ 0	$ 0
Common Stock, No Par Value	$ 0	$ 0

XML

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest Income
Loans	$ 99,712	$ 105,496	$ 200,027	$ 212,862
Taxable securities	24,750	18,343	47,566	39,431
Tax-exempt securities	2,826	2,257	5,585	4,559
Deposits in banks	159	136	311	277
Total interest income	127,447	126,232	253,489	257,129
Interest Expense
Deposits	1,426	2,094	2,911	5,736
FHLB advances and FRB borrowings	72	1,796	144	6,025
Subordinated debentures	468	468	936	936
Other borrowings	19	23	42	159
Total interest expense	1,985	4,381	4,033	12,856
Net Interest Income	125,462	121,851	249,456	244,273
Provision (recapture) for credit losses	(5,500)	33,500	(6,300)	75,000
Net interest income after provision (recapture) for credit losses	130,962	88,351	255,756	169,273
Noninterest Income
Deposit account and treasury management fees	6,701	6,092	13,059	13,880
Card revenue	4,773	3,079	8,506	6,597
Financial services and trust revenue	4,245	3,163	7,626	6,228
Loan revenue	4,514	5,607	11,883	10,197
Bank owned life insurance	1,635	1,618	3,195	3,214
Investment securities gains, net	314	16,425	314	16,674
Other	548	1,275	1,313	1,676
Total noninterest income	22,730	37,259	45,896	58,466
Noninterest Expense
Compensation and employee benefits	53,450	46,043	105,186	100,885
Occupancy	9,038	8,812	18,044	18,009
Data processing and software	7,402	7,981	15,853	15,080
Legal and professional fees	3,264	3,483	6,079	5,585
Amortization of intangibles	1,852	2,210	3,776	4,520
B&O taxes	1,490	1,244	2,749	1,868
Advertising and promotion	588	837	1,348	2,142
Regulatory premiums	1,112	1,034	2,217	1,068
Net cost (benefit) of operation of OREO	111	(200)	48	(188)
Other	5,809	9,389	12,375	16,135
Total noninterest expense	84,116	80,833	167,675	165,104
Income before income taxes	69,576	44,777	133,977	62,635
Income tax provision	14,537	8,195	27,085	11,425
Net Income	$ 55,039	$ 36,582	$ 106,892	$ 51,210
Earnings per common share
Basic	$ 0.77	$ 0.52	$ 1.50	$ 0.72
Diluted	$ 0.77	$ 0.52	$ 1.50	$ 0.72
Weighted average number of common shares outstanding	70,987	70,679	70,924	70,942
Weighted average number of diluted common shares outstanding	71,164	70,711	71,079	70,981

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net Income	$ 55,039	$ 36,582	$ 106,892	$ 51,210
Unrealized gain from securities
Net unrealized holding gain from available for sale debt securities arising during the period, net of tax	21,850	42,860	(80,755)	122,556
Reclassification adjustment of net gain from sale of available for sale debt securities included in income, net of tax	(241)	0	(241)	(191)
Amortization of net unrealized gain for the reclassification of available for sale securities to held to maturity, after Tax	345	0	345	0
Net unrealized gain from securities, net of reclassification adjustment	21,264	42,860	(81,341)	122,365
Pension plan liability adjustment:
Amortization of unrecognized net actuarial loss included in net periodic pension cost, net of tax	115	79	230	159
Pension plan liability adjustment, net	115	79	230	159
Unrealized gain from cash flow hedging instruments
Net unrealized gain (loss) in cash flow hedging instruments arising during the period, net of tax	0	2,611	0	20,588
Reclassification adjustment for net gain in cash flow hedging instruments included in income, net of tax	1,998	1,680	3,975	2,402
Net unrealized gain from cash flow hedging instruments, net of reclassification adjustment	(1,998)	931	(3,975)	18,186
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	19,381	43,870	(85,086)	140,710
Total comprehensive income	$ 74,420	$ 80,452	$ 21,806	$ 191,920

XML

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ (6,619)	$ (12,984)	$ 24,463	$ (37,126)
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	73	0	73	58
OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), Tax	105	0	105	0
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	(34)	(24)	(69)	(48)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	0	(791)	0	(6,237)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	$ 604	$ 510	$ 1,203	$ 728

XML

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		72,124
Adjustment to opening retained earnings, net of tax, pursuant to adoption of ASU | Accounting Standards Update 2016-02 [Member]	$ (2,457)		$ (2,457)
Balance, value at Dec. 31, 2019	2,159,962	$ 1,650,753	519,676	$ 40,367	$ (50,834)
Net income	51,210		51,210
Other comprehensive income (loss)	140,710			140,710
Issuance of common stock - employee stock purchase plan, shares		26
Issuance of common stock - employee stock purchase plan, value	$ 945	$ 945
Activity in Deferred Compensation Plan, shares	0
Activity in Deferred Compensation Plan, value	$ 4
Issuance of common stock - RSAs and RSUs, net of canceled awards, shares		234
Issuance of common stock - RSAs and RSUs, net of canceled awards, value	4,909	$ 4,909
Purchase and retirement of common stock, shares		(67)
Purchase and retirement of common stock, value	(2,482)	$ (2,482)
Cash dividends declared on common stock	(56,046)		(56,046)
Purchase of treasury stock, shares		(731)
Purchase of treasury stock, value	(20,000)				(20,000)
Balance, value at Jun. 30, 2020	2,276,755	$ 1,654,129	512,383	181,077	(70,834)
Shares, Outstanding		71,575
Balance, value at Mar. 31, 2020	2,213,602	$ 1,651,399	495,830	137,207	(70,834)
Net income	36,582		36,582
Other comprehensive income (loss)	$ 43,870			43,870
Activity in Deferred Compensation Plan, shares	0
Activity in Deferred Compensation Plan, value	$ 1	$ 1
Issuance of common stock - RSAs and RSUs, net of canceled awards, shares		12
Issuance of common stock - RSAs and RSUs, net of canceled awards, value	2,737	$ 2,737
Purchase and retirement of common stock, shares		(1)
Purchase and retirement of common stock, value	(8)	$ (8)
Cash dividends declared on common stock	(20,029)		(20,029)
Balance, value at Jun. 30, 2020	2,276,755	$ 1,654,129	512,383	181,077	(70,834)
Shares, Outstanding		71,586
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)	$ (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

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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Cash dividends declared on common stock, per share	$ 0.28	$ 0.28	$ 0.56	$ 0.78

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash Flows From Operating Activities
Net income	$ 106,892	$ 51,210
Adjustments to reconcile net income to net cash provided by operating activities
Provision (recapture) for credit losses	(6,300)	75,000
Stock-based compensation expense	6,936	4,909
Depreciation, amortization and accretion	7,056	10,382
Investment securities gain, net	314	16,674
Net realized gain on sale of premises and equipment, loans held for investment and OPPO	279	705
Net realized loss on sale and valuation adjustments of OREO	(40)	(18)
Gain on bank owned life insurance death benefit	209	0
Originations of loans held for sale	195,632	217,017
Proceeds from sales of loans held for sale	208,789	205,932
Change in fair value of loans held for sale	145	0
Net change in:
Interest receivable	2,484	(12,310)
Interest payable	(49)	(219)
Other assets	12,583	(93,919)
Other liabilities	(14,700)	76,500
Net cash provided by operating activities	127,442	83,107
Cash Flows From Investing Activities
Loans originated, net of principal collected	(177,399)	(1,026,250)
Purchases of debt securities available for sale	(1,527,512)	(259,236)
Purchases of debt securities held to maturity	(22,915)	0
Purchases of loans held for investment	74,383	0
Purchases of premises and equipment	(3,087)	(4,490)
Purchases of FHLB stock	0	(53,240)
Proceeds from sale of debt securities, available-for-sale	26,914	194,105
Proceeds from sale of equity securities	0	3,000
Proceeds from principal repayments and maturities of debt securities available for sale	385,408	265,072
Proceeds from repayments and maturities of securities held to maturity	8,711	0
Proceeds from sales of premises and equipment	4,296	932
Proceeds from redemption of Federal Home Loan Bank stock	0	85,080
Proceeds from sales of other real estate and other personal property owned	132	353
Proceeds from bank owned life insurance death benefit	671	1,050
Net cash used in investing activities	(1,379,164)	(793,624)
Cash Flows From Financing Activities
Net increase in deposits	1,475,570	2,446,782
Net decrease in sweep repurchase agreements	(2,865)	(12,958)
Proceeds from FHLB advances	10	1,331,000
Proceeds from FRB borrowings	0	222,010
Proceeds from other borrowings	0	9,222
Proceeds from exercise of stock options and employee stock purchase plan	1,098	945
Repayment of FHLB advances	(10)	(2,127,000)
Repayment of FRB borrowings	0	222,010
Repayments of other borrowings	0	9,222
Payments for common stock dividends	(40,244)	(55,750)
Purchase of treasury stock	0	(20,000)
Purchase and retirement of common stock	4,071	2,482
Net cash provided by financing activities	1,429,488	1,560,537
Increase (decrease) in cash and cash equivalents	177,766	850,020
Cash and cash equivalents at beginning of period	653,766	247,673
Cash and cash equivalents at end of period	831,532	1,097,693
Supplemental Information:
Cash paid for interest	4,082	13,075
Income Taxes Paid, Net	28,474	21,501
Non-cash investing and financing activities
Securities transfer from AFS to HTM, fair value	2,012,123	0
Loans transferred to OREO	0	558
Premises and equipment expenditures incurred but not yet paid	0	9
Change in dividends payable on unvested shares included in other liabilities	$ (122)	$ 296

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Basis of Presentation and Significant Accounting Policies

6 Months Ended

Jun. 30, 2021

Basis of Presentation And Significant Accounting Policies

Basis of Presentation and Significant Accounting Policies

Basis of Presentation, Significant Accounting Policies and Reclassifications

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, 2021 are not necessarily indicative of results to be anticipated for the year ending December 31, 2021. The accompanying interim unaudited Consolidated Financial Statements should be read in conjunction with the financial statements and related notes contained in the Company’s 2020 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 2020 Annual Report on Form 10-K. There have not been any changes in our significant accounting policies compared to those contained in our 2020 Form 10-K disclosure for the year ended December 31, 2020.

Reclassifications

Certain amounts reported in prior periods have been reclassified in the Consolidated Financial Statements to conform to the current presentation. Specifically, amounts related to software expense, which prior to January 1, 2021 had historically been included in “Other” noninterest expense, have been combined with data processing expense in the row titled “Data processing and software” in the Consolidated Statements of Income. The reclassifications have no effect on net income or shareholders’ equity as previously reported.

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Accounting Pronouncements Recently Adopted or Issued

6 Months Ended

Jun. 30, 2021

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 2021

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting. In response to concerns about structural risks of the cessation of LIBOR, the amendments in this ASU provide optional guidance for a limited time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this ASU provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments in this ASU apply only to contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022. The amendments in this ASU are elective and were effective March 12, 2020 for all entities. The adoption of this ASU did not have a material impact on the Company’s Consolidated Financial Statements.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes. The guidance issued in this ASU simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period and the recognition for deferred tax liabilities for outside basis differences. This ASU also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. The ASU is effective for interim and annual reporting periods beginning after December 15, 2020. The adoption of this ASU did not have a material impact on the Company’s Consolidated Financial Statements.

In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848) - Scope. The amendments in this ASU clarify that certain optional expedients and exceptions for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. Certain provisions, if elected, apply to derivative instruments that use an interest rate for margining, discounting or contract price alignment that is modified as a result of reference rate reform. Amendments in this ASU to the expedients and exceptions in Topic 848 capture the incremental consequences of the scope clarification and tailor the existing guidance to derivative instruments affected by the discounting transition. The ASU is effective for interim and annual reporting periods beginning on January 7, 2021. The adoption of this ASU is not expected to have a material impact on the Company’s Consolidated Financial Statements.

Recently Issued Accounting Standards, Not Yet Adopted

There are no recently issued accounting standards that are applicable to the Company and not yet adopted.

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Securities

6 Months Ended

Jun. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

Securities

During the second quarter of 2021, the Company transferred, at fair value, $2.01 billion of U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations from the available for sale classification to the held to maturity classification. The net unrealized after tax gain of $15.5 million remained in accumulated other comprehensive income and will be amortized over the remaining life of the securities, offsetting the related amortization of discount or premium on the transferred securities. No gains or losses were recognized at the time of the transfer.

The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of debt securities:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
June 30, 2021	(in thousands)
Available for sale
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	2,671,827	$	74,715	$	(9,342)	$	2,737,200
Other asset-backed securities	429,983		6,307		(3,976)		432,314
State and municipal securities	748,224		18,294		(2,458)		764,060
U.S. government agency and government-sponsored enterprise securities	253,162		4,663		(1,333)		256,492
Total available for sale	$	4,103,196	$	103,979	$	(17,109)	$	4,190,066
Held to maturity
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	2,024,715	$	9,586	$	(1,321)	$	2,032,980
Total held to maturity	$	2,024,715	$	9,586	$	(1,321)	$	2,032,980
December 31, 2020
Available for sale
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	3,640,351	$	178,579	$	(4,543)	$	3,814,387
Other asset-backed securities	349,904		9,651		(2,076)		357,479
State and municipal securities	729,066		25,098		(592)		753,572
U.S. government agency and government-sponsored enterprise securities	278,208		6,545		(57)		284,696
Total available for sale	$	4,997,529	$	219,873	$	(7,268)	$	5,210,134

There was no allowance for credit losses on both available for sale securities and held to maturity securities as of June 30, 2021 and December 31, 2020. 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 and/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 and six months ended June 30, 2021 and 2020.

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, 2021 and December 31, 2020, accrued interest receivable for securities available for sale was $15.1 million and $17.1 million, respectively. Accrued interest for securities held to maturity was $4.2 million at June 30, 2021. There was no accrued interest receivable related to securities held to maturity at December 31, 2020, as the Company did not have held to maturity securities at that date. 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,
	2021		2020		2021		2020
	(in thousands)
Proceeds from sales of debt securities available for sale	$	26,914	$	—	$	26,914	$	194,105
Gross realized gains from sales of debt securities available for sale	$	751	$	—	$	751	$	435
Gross realized losses from sales of debt securities available for sale	(437)		—		(437)		(186)
Other securities gains (1)	—		16,425		—		16,425
Investment securities gains, net	$	314	$	16,425	$	314	$	16,674

__________

(1) Other securities gains includes gain from sale of Visa Class B restricted stock and subsequent write up to fair value of remaining Visa Class B shares. For additional information, please see Note 13.

The following table provides the unrealized gains and losses on equity securities at the reporting date:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	(in thousands)
Gains recognized during the period on equity securities (1)	$	—	$	16,425	$	—	$	16,425
Less: Gains recognized during the period on equity securities sold during the period (1)	—		(3,000)		—		(3,000)
Unrealized gains recognized during the reporting period on equity securities still held at the reporting date (1)	$	—	$	13,425	$	—	$	13,425

__________

(1) Visa Class B restricted stock owned by the Company was carried at a zero-cost basis prior to June 2020 due to existing transfer restrictions and uncertainty regarding the outcome of Visa’s litigation that must be settled before the Visa Class B restricted shares may be converted into publicly traded Visa Class A common shares. The sale of shares by the Company of Visa Class B restricted shares during the three months ended June 30, 2020 resulted in an observable market price. As a result, the Company adjusted the carrying value of its remaining shares of Visa Class B restricted shares upward to this observable market price.

The scheduled contractual maturities of debt securities at the period presented below are as follows:

	June 30, 2021
	Available for sale				Held to maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(in thousands)
Due within one year	$	57,266	$	57,900	$	—	$	—
Due after one year through five years	751,065		779,527		26,224		26,163
Due after five years through ten years	1,531,719		1,578,489		1,241,524		1,248,569
Due after ten years	1,763,146		1,774,150		756,967		758,248
Total debt securities	$	4,103,196	$	4,190,066	$	2,024,715	$	2,032,980

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, 2021
	(in thousands)
To secure public funds	$	492,636
To secure borrowings	100,289
Other securities pledged	187,276
Total securities pledged as collateral	$	780,201

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 Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
June 30, 2021	(in thousands)
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	807,523	$	(8,956)	$	23,308	$	(386)	$	830,831	$	(9,342)
Other asset-backed securities	232,155		(3,976)		55		—		232,210		(3,976)
State and municipal securities	223,105		(2,443)		1,647		(15)		224,752		(2,458)
U.S. government agency and government-sponsored enterprise securities	150,218		(1,332)		—		(1)		150,218		(1,333)
Total	$	1,413,001	$	(16,707)	$	25,010	$	(402)	$	1,438,011	$	(17,109)
December 31, 2020
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	575,329	$	(3,728)	$	18,527	$	(815)	$	593,856	$	(4,543)
Other asset-backed securities	143,764		(2,076)		70		—		143,834		(2,076)
State and municipal securities	86,471		(592)		—		—		86,471		(592)
U.S. government agency and government-sponsored enterprise securities	74,943		(57)		—		—		74,943		(57)
Total	$	880,507	$	(6,453)	$	18,597	$	(815)	$	899,104	$	(7,268)

Debt securities available for sale

At June 30, 2021, there were 77 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, 2021.

At June 30, 2021, there were 18 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, 2021.

At June 30, 2021, there were 66 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, 2021, 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, 2021.

At June 30, 2021, there were nine 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, 2021.

Equity Securities without Readily Determinable Fair Values

Visa Class B Restricted Shares

In 2008, the Company received Visa Class B restricted shares as part of Visa’s initial public offering. These shares are transferable only under limited circumstances until they can be converted into publicly traded Visa Class A common shares. This conversion will not occur until the settlement of certain litigation which is indemnified by Visa members, including the Company. Visa funded an escrow account from its initial public offering to settle these litigation claims. Should this escrow account not be sufficient to cover these litigation claims, Visa is entitled to fund additional amounts to the escrow account by reducing each member bank’s Visa Class B conversion ratio to unrestricted Visa Class A shares.

During the second quarter of 2020, the Company sold 17,360 shares of Visa Class B restricted stock, which resulted in an observable market price. As a result, the Company adjusted the carrying value of its remaining Visa Class B restricted shares upward to this observable market price. At June 30, 2021, the Company owned 77,683 Visa Class B shares, which had a carrying value of $13.4 million.

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Loans

6 Months Ended

Jun. 30, 2021

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, 2021		December 31, 2020
	(dollars in thousands)
Commercial loans:
Commercial real estate	$	4,101,071	$	4,062,313
Commercial business	3,738,288		3,597,968
Agriculture	797,580		779,627
Construction	300,303		268,663
Consumer loans:
One-to-four family residential real estate	724,151		683,570
Other consumer	31,723		35,519
Total loans	9,693,116		9,427,660
Less: Allowance for credit losses	(142,988)		(149,140)
Total loans, net	$	9,550,128	$	9,278,520

At June 30, 2021 and December 31, 2020, 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 and Idaho.

At June 30, 2021 and December 31, 2020, $3.56 billion and $3.46 billion of commercial and residential real estate loans were pledged as collateral on FHLB advances and additional borrowing capacity. The Company has also pledged $200.3 million and $200.4 million of commercial loans to the FRB for additional borrowing capacity at June 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020, accrued interest receivable for loans was $33.1 million and $37.8 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 Loans		30 - 59 Days Past Due		60 - 89 Days Past Due		Greater than 90 Days Past Due		Total Past Due		Nonaccrual Loans		Total Loans
June 30, 2021	(in thousands)
Commercial loans:
Commercial real estate	$	4,089,659	$	8,244	$	149	$	—	$	8,393	$	3,019	$	4,101,071
Commercial business	3,724,202		2,351		990		—		3,341		10,745		3,738,288
Agriculture	785,071		2,537		938		—		3,475		9,034		797,580
Construction	300,303		—		—		—		—		—		300,303
Consumer loans:
One-to-four family residential real estate	720,854		775		1,343		—		2,118		1,179		724,151
Other consumer	31,658		20		1		—		21		44		31,723
Total	$	9,651,747	$	13,927	$	3,421	$	—	$	17,348	$	24,021	$	9,693,116
	Current Loans		30 - 59 Days Past Due		60 - 89 Days Past Due		Greater than 90 Days Past Due		Total Past Due		Nonaccrual Loans		Total Loans
December 31, 2020	(in thousands)
Commercial loans:
Commercial real estate	$	4,037,309	$	17,292	$	—	—		$	17,292	$	7,712	$	4,062,313
Commercial business	3,578,905		1,282		4,559		—		5,841		13,222		3,597,968
Agriculture	767,102		911		—		—		911		11,614		779,627
Construction	268,304		—		142		—		142		217		268,663
Consumer loans:
One-to-four family residential real estate	677,627		2,283		1,659		—		3,942		2,001		683,570
Other consumer	35,450		24		5		—		29		40		35,519
Total	$	9,364,697	$	21,792	$	6,365	$	—	$	28,157	$	34,806	$	9,427,660

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. In addition, the risk rating on loans modified in association with the CARES Act or Interagency guidance did not change. These loans are not considered past due until after the deferral period is over and scheduled payments resume. Accrued interest on these COVID-19 modified loans is due, in full, when the deferral period ends. The credit quality of these loans will be reevaluated after the deferral period ends.

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,
	2021		2020		2021		2020
	(in thousands)
Commercial loans	$	212	$	665	$	424	$	1,448
Consumer loans	2		8		9		13
Total	$	214	$	673	$	433	$	1,461

The following summarizes the amortized cost of nonaccrual loans for which there was no related ACL for the periods indicated:

	June 30, 2021		December 31, 2020
	(in thousands)
Commercial loans:
Commercial real estate	$	942	$	6,393
Commercial business	6,125		6,382
Agriculture	6,744		8,136
Total	$	13,811	$	20,911

The following is an analysis of loans classified as TDR for the periods indicated:

	Three Months Ended June 30, 2021					Three Months Ended June 30, 2020
	Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
	(dollars in thousands)
Commercial loans:
Commercial business	4	$	1,757	$	1,757	4	$	1,690	$	1,690
Consumer loans:
One-to-four family residential real estate	—	—		—		1	128		128
Total	4	$	1,757	$	1,757	5	$	1,818	$	1,818

	Six Months Ended June 30, 2021					Six Months Ended June 30, 2020
	Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
	(dollars in thousands)
Commercial loans:
Commercial real estate	1	$	628	$	628	—	$	—	$	—
Commercial business	11	2,600		2,600		6	1,962		1,962
Agriculture	—	—		—		1	895		895
Consumer loans:
One-to-four family residential real estate	2	140		140		2	196		196
Total	14	$	3,368	$	3,368	9	$	3,053	$	3,053

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 $988 thousand of additional funds on loans classified as TDR as of June 30, 2021. The Company had $651 thousand of such commitments at December 31, 2020. The Company had no loans classified as TDR that defaulted within 12 months of being classified as TDR during the three months and six months ended June 30, 2021 and 2020.

Financial institutions are required to maintain records of the volume of loans involved in modifications to which troubled debt restructuring relief is applicable. At June 30, 2021, the Company had 10 short–term deferments on $40.7 million of loans, gross of unearned income. These short–term deferments are not classified as TDRs and will not be reported as past due provided that they are performing in accordance with the modified terms.

The Company offered PPP loans to provide financial support to small and medium-size businesses to cover payroll and certain other expenses during the COVID-19 pandemic. The PPP was established by the CARES Act and is implemented by the U.S. SBA with support from the U.S. Department of Treasury. The program, which was amended by the Paycheck Protection Flexibility Act of 2020, provides small businesses with funds to pay up to 24 weeks of payroll costs including benefits, as well as interest on mortgages, rent and utilities. Funds are provided to small businesses in the form of loans that will be fully forgiven when used for permitted purposes and when at least 60% of the funds are used for payroll costs and applicable employment levels are maintained in accordance with the requirements of the amended PPP. At June 30, 2021, we had $691.9 million of PPP loans outstanding, which are included in commercial business loans.

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Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit

6 Months Ended

Jun. 30, 2021

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 expected credit losses within the loan portfolio and is deducted from the loan’s amortized cost basis to present the net amount of loans expected to be collected. 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 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 foreclosure is probable. 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 loans measured on an individual basis, 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 (Recapture)		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 (Recapture)		Ending Balance
Six Months Ended June 30, 2021	(in thousands)
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

	Beginning Balance		Charge-offs		Recoveries		Provision (Recapture)		Ending Balance
Three Months Ended June 30, 2020	(in thousands)
Commercial loans:
Commercial real estate	$	37,122	$	—	$	13	$	13,098	$	50,233
Commercial business	45,570		(5,442)		811		12,247		53,186
Agriculture	11,085		—		1		3,782		14,868
Construction	8,845		—		235		(1,127)		7,953
Consumer loans:
One-to-four family residential real estate	17,659		—		422		5,630		23,711
Other consumer	1,644		(198)		130		19		1,595
Unallocated	149		—		—		(149)		—
Total	$	122,074	$	(5,640)	$	1,612	$	33,500	$	151,546

	Beginning Balance		Impact of Adopting ASC 326		Charge-offs		Recoveries		Provision (Recapture)		Ending Balance
Six Months Ended June 30, 2020	(in thousands)
Commercial loans:
Commercial real estate	$	20,340	$	7,533	$	(101)	$	27	$	22,434	$	50,233
Commercial business	30,292		762		(7,126)		1,671		27,587		53,186
Agriculture	15,835		(9,325)		(4,726)		42		13,042		14,868
Construction	8,571		(1,750)		—		677		455		7,953
Consumer loans:
One-to-four family residential real estate	7,435		4,237		(10)		704		11,345		23,711
Other consumer	883		778		(466)		254		146		1,595
Unallocated	612		(603)		—		—		(9)		—
Total	83,968		1,632		(12,429)		3,375		75,000		151,546

The $6.2 million decrease in the ACL at June 30, 2021 compared to the ACL at December 31, 2020 was primarily due to a slight improvement in the economic outlook, which remains impacted by the COVID-19 pandemic and its impact on our borrowers. Specifically regarding the forecast used in the June 30, 2021 estimate, management expects the forecasted national unemployment rate to return to pre-pandemic levels in 2023. Additionally, the commercial real estate index decline is expected to continue through 2021, followed by a slight increase in 2022. The home price index is projected to moderate over the forecast period and real GDP growth is projected to continue to be above average during this time. 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, 2021 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,
	2021		2020		2021		2020
	(in thousands)
Beginning balance	$	9,800	$	6,000	$	8,300	$	3,430
Impact of adopting ASC 326	—		—		—		1,570
Net changes in the allowance for unfunded commitments and letters of credit	200		2,800		1,700		3,800
Ending balance	$	10,000	$	8,800	$	10,000	$	8,800

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 $100,000 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
	2021		2020		2019		2018		2017		Prior						Total (1)
June 30, 2021	(in thousands)
Commercial loans:
Commercial real estate
Pass	$	389,826	$	648,251	$	584,280	$	443,700	$	452,989	$	1,163,730	$	57,550	$	2,775	$	3,743,101
Special mention	1,875		10,168		58,636		21,408		26,722		60,889		—		2,195		181,893
Substandard	507		3,917		43,600		10,882		28,362		87,655		1,154		—		176,077
Total commercial real estate	$	392,208	$	662,336	$	686,516	$	475,990	$	508,073	$	1,312,274	$	58,704	$	4,970	$	4,101,071
Commercial business
Pass	$	881,501	$	585,999	$	325,418	$	245,432	$	163,134	$	316,525	$	980,429	$	16,876	$	3,515,314
Special mention	—		1,243		8,311		6,293		4,955		990		43,386		251		65,429
Substandard	336		5,808		24,959		29,854		22,175		31,814		41,282		1,317		157,545
Total commercial business	$	881,837	$	593,050	$	358,688	$	281,579	$	190,264	$	349,329	$	1,065,097	$	18,444	$	3,738,288
Agriculture
Pass	$	97,908	$	95,853	$	82,533	$	37,066	$	54,739	$	102,476	$	259,260	$	1,744	$	731,579
Special mention	109		4,593		738		325		64		—		4,526		—		10,355
Substandard	—		6,343		10,045		1,643		3,862		2,529		30,317		907		55,646
Total agriculture	$	98,017	$	106,789	$	93,316	$	39,034	$	58,665	$	105,005	$	294,103	$	2,651	$	797,580
Construction
Pass	$	115,216	$	101,292	$	19,352	$	6,699	$	3,448	$	4,897	$	30,302	$	304	$	281,510
Substandard	—		—		18,739		—		—		54		—		—		18,793
Total construction	$	115,216	$	101,292	$	38,091	$	6,699	$	3,448	$	4,951	$	30,302	$	304	$	300,303
Consumer loans:
One-to-four family residential real estate
Pass	$	130,355	$	146,145	$	58,921	$	49,106	$	23,838	$	81,118	$	227,230	$	622	$	717,335
Special mention	—		2,350		—		—		314		—		—		—		2,664
Substandard	—		81		1,201		239		172		2,132		172		155		4,152
Total one-to-four family real estate	$	130,355	$	148,576	$	60,122	$	49,345	$	24,324	$	83,250	$	227,402	$	777	$	724,151
Other consumer
Pass	$	4,289	$	3,294	$	2,270	$	1,789	$	671	$	1,122	$	18,006	$	192	$	31,633
Substandard	—		25		38		—		2		2		23		—		90
Total consumer	$	4,289	$	3,319	$	2,308	$	1,789	$	673	$	1,124	$	18,029	$	192	$	31,723
Total	$	1,621,922	$	1,615,362	$	1,239,041	$	854,436	$	785,447	$	1,855,933	$	1,693,637	$	27,338	$	9,693,116
Less:
Allowance for credit losses																	142,988
Loans, net																	$	9,550,128

__________

(1) Loans that are on short-term deferments are treated as Pass loans and will not be reported as past due provided that they are performing in accordance with the modified terms.

													Revolving Loans Amortized Cost Basis		Revolving Loans Converted to Term Loans Amortized Cost Basis
	Term Loans
	Amortized Cost Basis by Origination Year
	2020		2019		2018		2017		2016		Prior						Total
December 31, 2020	(in thousands)
Commercial loans:
Commercial real estate
Pass	$	674,444	$	645,328	$	478,881	$	502,112	$	408,972	$	946,980	$	52,049	$	11,332	$	3,720,098
Special mention	3,348		39,374		21,285		30,232		46,197		50,115		5		2,139		192,695
Substandard	2,916		24,860		13,571		15,652		43,735		41,138		3,389		4,259		149,520
Total commercial real estate	$	680,708	$	709,562	$	513,737	$	547,996	$	498,904	$	1,038,233	$	55,443	$	17,730	$	4,062,313
Commercial business
Pass	$	1,087,400	$	366,435	$	324,360	$	199,010	$	218,313	$	214,677	$	1,000,725	$	11,540	$	3,422,460
Special mention	3,002		26,361		8,471		24,582		7,004		10,650		22,426		—		102,496
Substandard	3,625		7,376		11,061		5,905		6,396		3,743		32,134		2,772		73,012
Total commercial business	$	1,094,027	$	400,172	$	343,892	$	229,497	$	231,713	$	229,070	$	1,055,285	$	14,312	$	3,597,968
Agriculture
Pass	$	142,163	$	90,612	$	44,434	$	58,366	$	58,893	$	59,396	$	244,135	$	9,299	$	707,298
Special mention	—		90		285		33		—		—		85		13		506
Substandard	5,193		12,480		5,868		4,258		284		3,502		38,780		1,458		71,823
Total agriculture	$	147,356	$	103,182	$	50,587	$	62,657	$	59,177	$	62,898	$	283,000	$	10,770	$	779,627
Construction
Pass	$	134,693	$	66,974	$	10,066	$	3,498	$	763	$	1,805	$	29,323	$	3,753	$	250,875
Substandard	—		17,732		—		—		—		56		—		—		17,788
Total construction	$	134,693	$	84,706	$	10,066	$	3,498	$	763	$	1,861	$	29,323	$	3,753	$	268,663
Consumer loans:
One-to-four family real estate
Pass	$	161,021	$	77,756	$	62,696	$	29,737	$	20,889	$	78,098	$	243,325	$	3,655	$	677,177
Special mention	—		—		332		—		—		195		—		—		527
Substandard	—		849		227		1,166		344		1,968		1,005		307		5,866
Total one-to-four family real estate	$	161,021	$	78,605	$	63,255	$	30,903	$	21,233	$	80,261	$	244,330	$	3,962	$	683,570
Other consumer
Pass	$	5,548	$	3,109	$	3,886	$	989	$	244	$	1,060	$	19,911	$	474	$	35,221
Substandard	30		—		—		5		—		170		53		40		298
Total consumer	$	5,578	$	3,109	$	3,886	$	994	$	244	$	1,230	$	19,964	$	514	$	35,519
Total	$	2,223,383	$	1,379,336	$	985,423	$	875,545	$	812,034	$	1,413,553	$	1,687,345	$	51,041	$	9,427,660
Less:
Allowance for credit losses																	149,140
Loans, net																	$	9,278,520

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Other Real Estate Owned

6 Months Ended

Jun. 30, 2021

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,
	2021		2020		2021		2020
	(in thousands)
Balance, beginning of period	$	521	$	510	$	553	$	552
Transfers in	—		558		—		558
Valuation adjustments	(140)		—		(140)		—
Proceeds from sale of OREO property	—		(303)		(132)		(345)
Gain (loss) on sale of OREO, net	—		(18)		100		(18)
Balance, end of period	$	381	$	747	$	381	$	747

At June 30, 2021, there were no foreclosed residential real estate properties held as OREO. The recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process was $166 thousand.

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Goodwill and Intangible Assets

6 Months Ended

Jun. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Other Intangible Assets

In accordance with the Intangibles – Goodwill and Other topic of the FASB ASC, 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,
	2021		2020		2021		2020
	(in thousands)
Goodwill
Total goodwill	$	765,842	$	765,842	$	765,842	$	765,842
Other intangible assets, net
CDI:
Gross CDI balance at beginning of period	105,473		105,473		105,473		105,473
Accumulated amortization at beginning of period	(81,582)		(73,244)		(79,658)		(70,934)
CDI, net at beginning of period	23,891		32,229		25,815		34,539
CDI current period amortization	(1,852)		(2,210)		(3,776)		(4,520)
Total CDI, net at end of period	22,039		30,019		22,039		30,019
Intangible assets not subject to amortization	919		919		919		919
Other intangible assets, net at end of period	22,958		30,938		22,958		30,938
Total goodwill and other intangible assets at end of period	$	788,800	$	796,780	$	788,800	$	796,780

The following table provides the estimated future amortization expense of our CDI for the remaining six months ending December 31, 2021 and the succeeding four years:

	Year ending December 31,
	(in thousands)
2021	$	3,488
2022	5,880
2023	4,552
2024	3,432
2025	2,415

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Revolving Line of Credit	6 Months Ended
	Jun. 30, 2021
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, for which the term was extended through May 26, 2022 as a result of an amendment executed during the second quarter of 2021. This facility has a variable interest rate and provides the Company additional liquidity, if needed, for various corporate activities including the repurchase of shares of Columbia Banking System, Inc. common stock. There was no outstanding balance at both June 30, 2021 and December 31, 2020. 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, 2021.

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Derivatives and Balance Sheet Offsetting

6 Months Ended

Jun. 30, 2021

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 and 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, 2021 and 2020. 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, 2021 and December 31, 2020, the Bank had commitments to originate mortgage loans held for sale totaling $26.9 million and $31.9 million, respectively, and forward sales commitments of $21.5 million and $26.5 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, 2021 and December 31, 2020 was $605.1 million and $597.9 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, 2021			December 31, 2020			June 30, 2021			December 31, 2020
	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
	(in thousands)
Derivatives not designated as hedging instruments:
Interest rate lock commitments	Other assets	$	585	Other assets	$	1,096	Other liabilities	$	—	Other liabilities	$	—
Interest rate forward loan sales contracts	Other assets	$	—	Other assets	$	—	Other liabilities	$	23	Other liabilities	$	165
Interest rate swap contracts	Other assets	$	32,546	Other assets	$	46,184	Other liabilities	$	32,853	Other liabilities	$	46,637

The table below presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) for the periods indicated:

	Amount of Gain or (Loss) Recognized in Accumulated Other Comprehensive Income on Derivative				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,					Three Months Ended June 30,
	2021		2020			2021		2020
	(in thousands)
Interest rate collar	$	—	$	3,402	Interest income	$	2,602	$	2,190
	Six Months Ended June 30,					Six Months Ended June 30,
	2021		2020			2021		2020
Interest rate collar	$	—	$	26,825	Interest income	$	5,178	$	3,130

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,
	2021		2020		2021		2020
	(in thousands)
Interest rate lock commitments	$	(340)	$	—	$	(511)	$	—
Interest rate forward loan sales contracts	(527)		—		143		—
Interest rate swap contracts	(40)		(473)		72		(473)
Total derivative gains (losses)	$	(907)	$	(473)	$	(296)	$	(473)

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, 2021	(in thousands)
Assets
Interest rate swap contracts	$	32,546	$	—	$	32,546	$	(430)	$	32,116
Liabilities
Interest rate swap contracts	$	32,853	$	—	$	32,853	$	(30,167)	$	2,686
Repurchase agreements	$	70,994	$	—	$	70,994	$	(70,994)	$	—
December 31, 2020
Assets
Interest rate swap contracts	$	46,184	$	—	$	46,184	$	—	$	46,184
Liabilities
Interest rate swap contracts	$	46,637	$	—	$	46,637	$	(46,637)	$	—
Repurchase agreements	$	73,859	$	—	$	73,859	$	(73,859)	$	—

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, 2021	(in thousands)
Class of collateral pledged for repurchase agreements
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	70,994	$	—	$	—	$	—	$	70,994
Gross amount of recognized liabilities for repurchase agreements									70,994
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 $71.0 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.

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Commitments and contingent liabilities

6 Months Ended

Jun. 30, 2021

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 2021 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, 2021 and December 31, 2020, the Company’s loan commitments amounted to $3.04 billion and $2.80 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 $24.7 million and $29.9 million at June 30, 2021 and December 31, 2020, respectively.

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.

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Shareholders' Equity

6 Months Ended

Jun. 30, 2021

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 28, 2021	$	0.28	February 10, 2021	February 24, 2021
April 29, 2021	$	0.28	May 12, 2021	May 26, 2021

Subsequent to quarter end, on July 29, 2021, the Company declared a regular quarterly cash dividend of $0.28 per common share payable on August 25, 2021 to shareholders of record at the close of business on August 11, 2021.

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.

Share Repurchase Program:

For the three and six months ended June 30, 2021, the Company did not purchase any common shares under the share repurchase program.

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Accumulated Other Comprehensive Income

6 Months Ended

Jun. 30, 2021

Accumulated Other Comprehensive Income (Loss) [Abstract]

Accumulated Other Comprehensive Income

Accumulated Other Comprehensive Income

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, 2021	(in thousands)
Beginning balance	$	60,569	$	(5,718)	$	22,877	$	77,728
Other comprehensive income (loss) 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
Three Months Ended June 30, 2020
Beginning balance	$	112,543	$	(3,894)	$	28,558	$	137,207
Other comprehensive income before reclassifications	42,860		—		2,611		45,471
Amounts reclassified from accumulated other comprehensive income (2)	—		79		(1,680)		(1,601)
Net current-period other comprehensive income	42,860		79		931		43,870
Ending balance	$	155,403	$	(3,815)	$	29,489	$	181,077
Six Months Ended June 30, 2021
Beginning balance	$	163,174	$	(5,833)	$	24,854	$	182,195
Other comprehensive income (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
Six Months Ended June 30, 2020
Beginning balance	$	33,038	$	(3,974)	$	11,303	$	40,367
Other comprehensive income before reclassifications	122,556		—		20,588		143,144
Amounts reclassified from accumulated other comprehensive income (2)	(191)		159		(2,402)		(2,434)
Net current-period other comprehensive income	122,365		159		18,186		140,710
Ending balance	$	155,403	$	(3,815)	$	29,489	$	181,077

__________

(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
	2021		2020		2021		2020		Statement of Income
	(in thousands)
Unrealized gains on available for sale debt securities	$	314	$	—	$	314	$	249	Investment securities gains, net
Amortization of unrealized gains related to securities transfer	450		—		450		—		Loan interest income
	764		—		764		249		Total before tax
	(178)		—		(178)		(58)		Income tax provision
	$	586	$	—	$	586	$	191	Net of tax
Amortization of pension plan liability actuarial losses	$	(149)	$	(103)	$	(299)	$	(207)	Compensation and employee benefits
	(149)		(103)		(299)		(207)		Total before tax
	34		24		69		48		Income tax provision
	$	(115)	$	(79)	$	(230)	$	(159)	Net of tax
Unrealized gains from hedging instruments	$	2,602	$	2,190	$	5,178	$	3,130	Loans
	2,602		2,190		5,178		3,130		Total before tax
	(604)		(510)		(1,203)		(728)		Income tax provision
	$	1,998	$	1,680	$	3,975	$	2,402	Net of tax

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Fair Value Accounting and Measurement

6 Months Ended

Jun. 30, 2021

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 table sets 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, 2021	(in thousands)
Assets
Debt securities available for sale:
U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	2,737,200	$	—	$	2,737,200	$	—
Other asset-backed securities	432,314		—		432,314		—
State and municipal securities	764,060		—		764,060		—
U.S. government agency and government-sponsored enterprise securities	256,492		—		256,492		—
Total debt securities available for sale	$	4,190,066	$	—	$	4,190,066	$	—
Loans held for sale	$	14,413	$	—	$	14,413	$	—
Other assets:
Interest rate lock commitments	$	585	$	—	$	—	$	585
Interest rate contracts	$	32,546	$	—	$	32,546	$	—
Liabilities
Other liabilities:
Interest rate forward loan sales contracts	$	23	$	—	$	23	$	—
Interest rate contracts	$	32,853	$	—	$	32,853	$	—

	Fair Value		Fair Value Measurements at Reporting Date Using
			Level 1		Level 2		Level 3
December 31, 2020	(in thousands)
Assets
Debt securities available for sale:
U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	3,814,387	$	—	$	3,814,387	$	—
Other asset-backed securities	357,479		—		357,479		—
State and municipal securities	753,572		—		753,572		—
U.S. government agency and government-sponsored enterprise securities	284,696		—		284,696		—
Total debt securities available for sale	$	5,210,134	$	—	$	5,210,134	$	—
Loans held for sale	$	14,760	$	—	$	14,760	$	—
Other assets:
Interest rate lock commitments	$	1,096	$	—	$	—	$	1,096
Interest rate contracts	$	46,184	$	—	$	46,184	$	—
Liabilities
Other liabilities:
Interest rate forward loan sales contracts	$	165	$	—	$	165	$	—
Interest rate contracts	$	46,637	$	—	$	46,637	$	—

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, 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,
	2021		2020		2021		2020
	(in thousands)
Balance at the beginning of the period	$	925	$	—	$	1,096	$	—
Change included in earnings	2,134		—		3,844		—
Settlements	(2,474)		—		(4,355)		—
Balance at the end of the period	$	585	$	—	$	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 and equity securities without readily determinable fair value.

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.

Equity securities without readily determinable fair value - The Company measures equity securities without readily determinable fair values at cost less impairment (if any), plus or minus observable price changes from an identical or similar investment of the same issuer, with such changes recognized in earnings. Our equity securities without readily determinable fair values consist of 77,683 Visa Class B shares. These shares are currently subject to certain transfer restrictions and will be convertible into Visa Class A shares upon final resolution of certain litigation matters involving Visa. For additional information, please see Note 3 of this report.

OREO - OREO is real property that the Bank has taken ownership of 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 following table presents the carrying value of equity securities, without readily determinable fair values, still held as of June 30, 2021, that are measured under the measurement alternative and related adjustments recorded during the periods presented for those securities with observable price changes. These securities are included in the nonrecurring fair value tables when applicable price changes are observable.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
Equity securities without readily determinable fair values	(in thousands)
Carrying value, beginning of period	$	13,425	$	—	$	13,425	$	—
Upward carrying value changes	—		13,425		—		13,425
Carrying value, end of period	$	13,425	$	13,425	$	13,425	$	13,425

The following tables set forth information related to the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the current and prior year quarterly periods:

	Fair Value at June 30, 2021		Fair Value Measurements  at Reporting Date Using						Losses During the Three Months Ended June 30, 2021		Losses During the Six Months Ended 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 at June 30, 2020		Fair Value Measurements  at Reporting Date Using						Gains (Losses) During the Three Months Ended June 30, 2020		Gains (Losses) During the Six Months Ended June 30, 2020
			Level 1		Level 2		Level 3
	(in thousands)
Collateral dependent loans	$	7,976	$	—	$	—	$	7,976	$	(6,946)	$	(7,745)
Equity securities	$	13,425	$	—	$	—	$	13,425	$	13,425	$	13,425

The losses on collateral dependent loans disclosed above represent the amount of the allowance 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 fixed and intangible assets).

(2) Collateral consists of intangible assets, fixed assets and real estate.

	Fair Value at June 30, 2020		Valuation Technique	Unobservable Input	Range (Weighted Average) (1)
	(dollars in thousands)
Collateral dependent loans (2)	$	7,976	Fair Market Value of Collateral	Adjustment to Stated Value	0.00% - 100.00% (56.22%)

__________

(1) Discount applied to appraised value or stated value (in the case of accounts receivable, fixed assets and inventory).

(2) Collateral consists of cash, accounts receivable, fixed assets, inventory and real estate.

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, 2021
	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Assets
Cash and due from banks	$	218,649	$	218,649	$	218,649	$	—	$	—
Interest-earning deposits with banks	612,883		612,883		612,883		—		—
Debt securities available for sale	4,190,066		4,190,066		—		4,190,066		—
Debt securities held to maturity	2,024,715		2,032,980		—		2,032,980		—
FHLB stock	10,280		10,280		—		10,280		—
Loans held for sale	13,179		13,179		—		13,179		—
Loans	9,550,128		9,955,668		—		—		9,955,668
Interest rate contracts	32,546		32,546		—		32,546		—
Interest rate lock commitments	585		585		—		—		585
Liabilities
Time deposits	$	327,882	$	326,735	$	—	$	326,735	$	—
FHLB advances	7,386		8,878		—		8,878		—
Repurchase agreements	70,994		70,994		—		70,994		—
Subordinated debentures	35,000		35,171		—		35,171		—
Interest rate contracts	32,853		32,853		—		32,853		—
Interest rate forward loan sales contracts	23		23		—		23		—

	December 31, 2020
	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Assets
Cash and due from banks	$	218,899	$	218,899	$	218,899	$	—	$	—
Interest-earning deposits with banks	434,867		434,867		434,867		—		—
Debt securities available for sale	5,210,134		5,210,134		—		5,210,134		—
FHLB stock	10,280		10,280		—		10,280		—
Loans held for sale	26,481		26,481		—		26,481		—
Loans	9,278,520		9,720,592		—		—		9,720,592
Interest rate contracts	46,184		46,184		—		46,184		—
Interest rate lock commitments	1,096		1,096		—		—		1,096
Liabilities
Time deposits	$	338,845	$	338,815	$	—	$	338,815	$	—
FHLB advances and FRB borrowings	7,414		9,295		—		9,295		—
Repurchase agreements	73,859		73,859		—		73,859		—
Subordinated debentures	35,092		35,414		—		35,414		—
Interest rate contracts	46,637		46,637		—		46,637		—
Interest rate forward loan sales contracts	165		165		—		165		—

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, 2021						December 31, 2020
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)
$	14,413	$	14,050	$	363	$	14,760	$	14,252	$	508

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 and six months ended June 30, 2021, the Company recorded net decreases in fair value of $57 thousand and $145 thousand, respectively, representing the change in fair value reflected in earnings. For the three and six months ended June 30, 2020, there were no such loans held for sale under the mandatory delivery method. At June 30, 2021 and December 31, 2020, 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.

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Earnings per Common Share

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Earnings Per Common Share

Earnings Per Common Share

The 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,
	2021		2020		2021		2020
	(in thousands except per share amounts)
Basic EPS:
Net income	$	55,039	$	36,582	$	106,892	$	51,210
Less: Earnings allocated to participating securities:
Nonvested restricted shares	70		139		227		325
Earnings allocated to common shareholders	$	54,969	$	36,443	$	106,665	$	50,885
Weighted average common shares outstanding	70,987		70,679		70,924		70,942
Basic earnings per common share	$	0.77	$	0.52	$	1.50	$	0.72
Diluted EPS:
Earnings allocated to common shareholders	$	54,969	$	36,443	$	106,665	$	50,885
Weighted average common shares outstanding	70,987		70,679		70,924		70,942
Dilutive effect of equity awards	177		32		155		39
Weighted average diluted common shares outstanding	71,164		70,711		71,079		70,981
Diluted earnings per common share	$	0.77	$	0.52	$	1.50	$	0.72
Potentially dilutive RSAs and RSUs that were not included in the computation of diluted EPS because to do so would be anti-dilutive	248		571		158		450

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Revenue from Contracts with Customers

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Revenue from Contract with Customer [Text Block]

Revenue from Contracts with Customers

Revenue in the scope of Topic 606, Revenue from Contracts with Customers is measured based on the consideration specified in the contract with a customer and excludes amounts collected on behalf of third parties. The vast majority of the Company’s revenue is specifically outside the scope of Topic 606. For in-scope revenue, the following is a description of principal activities, separated by the timing of revenue recognition from which the Company generates its revenue from contracts with customers.

a.Revenue earned at a point in time - Examples of revenue earned at a point in time are ATM transaction fees, wire transfer fees, overdraft fees, interchange fees and foreign exchange transaction fees. Revenue is primarily based on the number and type of transactions and is generally derived from transactional information accumulated by our systems and is recognized immediately as the transactions occur or upon providing the service to complete the customer’s transaction. The Company is the principal in each of these contracts, with the exception of interchange fees, in which case we are acting as the agent and record revenue net of expenses paid to the principal.

b.Revenue earned over time - The Company earns revenue from contracts with customers in a variety of ways where the revenue is earned over a period of time - generally monthly. Examples of this type of revenue are deposit account maintenance fees, investment advisory fees, merchant revenue and safe deposit box fees. Revenue is generally derived from transactional information accumulated by our systems or those of third-parties and is recognized as the related transactions occur or services are rendered to the customer.

The Company recognizes revenue from contracts with customers when it satisfies its performance obligations. The Company’s performance obligations are typically satisfied as services are rendered and our contracts generally do not include multiple performance obligations. As a result, there are no contract balances as payments and services are rendered simultaneously. Payment is generally collected at the time services are rendered, monthly or quarterly. Unsatisfied performance obligations at the report date are not material to our Consolidated Financial Statements.

In certain cases, other parties are involved with providing products and services to our customers. If the Company is principal in the transaction (providing goods or services itself), revenues are reported based on the gross consideration received from the customer and any related expenses are reported gross in noninterest expense. If the Company is an agent in the transaction (arranging for another party to provide goods or services), the Company reports its net fee or commission retained as revenue.

Rebates, waivers and reversals are recorded as a reduction of the transaction price either when the revenue is recognized by the Company or at the time the rebate, waiver or reversal is earned by the customer.

Practical expedients

The Company applies the practical expedient in paragraph 606-10-32-18 and does not adjust the consideration from customers for the effects of a significant financing component if at contract inception the period between when the entity transfers the goods or services and when the customer pays for that good or service will be one year or less.

The Company pays sales commissions to its employees in accordance with certain incentive plans and in connection with obtaining certain contracts with customers. The Company applies the practical expedient in paragraph 340-40-25-4 and expenses such sales commissions when incurred if the amortization period of the asset the Company otherwise would have recognized is one year or less. Sales commissions are included in compensation and employee benefits expense.

For the Company’s contracts that have an original expected duration of one year or less, the Company uses the practical expedient in paragraph 606-10-50-14 and has not disclosed the amount of the transaction price allocated to unsatisfied performance obligations as of the end of each reporting period or when the Company expects to recognize this revenue.

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,
	2021		2020		2021		2020
	(in thousands)
Noninterest income:
Revenue from contracts with customers:
Deposit account and treasury management fees	$	6,701	$	6,092	$	13,059	$	13,880
Card revenue	4,773		3,079		8,506		6,597
Financial services and trust revenue	4,245		3,163		7,626		6,228
Total revenue from contracts with customers	15,719		12,334		29,191		26,705
Other sources of noninterest income	7,011		24,925		16,705		31,761
Total noninterest income	$	22,730	$	37,259	$	45,896	$	58,466

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Securities (Tables)

6 Months Ended

Jun. 30, 2021

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 Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
June 30, 2021	(in thousands)
Available for sale
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	2,671,827	$	74,715	$	(9,342)	$	2,737,200
Other asset-backed securities	429,983		6,307		(3,976)		432,314
State and municipal securities	748,224		18,294		(2,458)		764,060
U.S. government agency and government-sponsored enterprise securities	253,162		4,663		(1,333)		256,492
Total available for sale	$	4,103,196	$	103,979	$	(17,109)	$	4,190,066
Held to maturity
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	2,024,715	$	9,586	$	(1,321)	$	2,032,980
Total held to maturity	$	2,024,715	$	9,586	$	(1,321)	$	2,032,980
December 31, 2020
Available for sale
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	3,640,351	$	178,579	$	(4,543)	$	3,814,387
Other asset-backed securities	349,904		9,651		(2,076)		357,479
State and municipal securities	729,066		25,098		(592)		753,572
U.S. government agency and government-sponsored enterprise securities	278,208		6,545		(57)		284,696
Total available for sale	$	4,997,529	$	219,873	$	(7,268)	$	5,210,134

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,
	2021		2020		2021		2020
	(in thousands)
Proceeds from sales of debt securities available for sale	$	26,914	$	—	$	26,914	$	194,105
Gross realized gains from sales of debt securities available for sale	$	751	$	—	$	751	$	435
Gross realized losses from sales of debt securities available for sale	(437)		—		(437)		(186)
Other securities gains (1)	—		16,425		—		16,425
Investment securities gains, net	$	314	$	16,425	$	314	$	16,674

__________

(1) Other securities gains includes gain from sale of Visa Class B restricted stock and subsequent write up to fair value of remaining Visa Class B shares. For additional information, please see Note 13.

Unrealized gains and losses on equity securities

The following table provides the unrealized gains and losses on equity securities at the reporting date:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	(in thousands)
Gains recognized during the period on equity securities (1)	$	—	$	16,425	$	—	$	16,425
Less: Gains recognized during the period on equity securities sold during the period (1)	—		(3,000)		—		(3,000)
Unrealized gains recognized during the reporting period on equity securities still held at the reporting date (1)	$	—	$	13,425	$	—	$	13,425

__________

(1) Visa Class B restricted stock owned by the Company was carried at a zero-cost basis prior to June 2020 due to existing transfer restrictions and uncertainty regarding the outcome of Visa’s litigation that must be settled before the Visa Class B restricted shares may be converted into publicly traded Visa Class A common shares. The sale of shares by the Company of Visa Class B restricted shares during the three months ended June 30, 2020 resulted in an observable market price. As a result, the Company adjusted the carrying value of its remaining shares of Visa Class B restricted shares upward to this observable market price

Schedule Of Contractual Maturities

The scheduled contractual maturities of debt securities at the period presented below are as follows:

	June 30, 2021
	Available for sale				Held to maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(in thousands)
Due within one year	$	57,266	$	57,900	$	—	$	—
Due after one year through five years	751,065		779,527		26,224		26,163
Due after five years through ten years	1,531,719		1,578,489		1,241,524		1,248,569
Due after ten years	1,763,146		1,774,150		756,967		758,248
Total debt securities	$	4,103,196	$	4,190,066	$	2,024,715	$	2,032,980

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, 2021
	(in thousands)
To secure public funds	$	492,636
To secure borrowings	100,289
Other securities pledged	187,276
Total securities pledged as collateral	$	780,201

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 Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
June 30, 2021	(in thousands)
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	807,523	$	(8,956)	$	23,308	$	(386)	$	830,831	$	(9,342)
Other asset-backed securities	232,155		(3,976)		55		—		232,210		(3,976)
State and municipal securities	223,105		(2,443)		1,647		(15)		224,752		(2,458)
U.S. government agency and government-sponsored enterprise securities	150,218		(1,332)		—		(1)		150,218		(1,333)
Total	$	1,413,001	$	(16,707)	$	25,010	$	(402)	$	1,438,011	$	(17,109)
December 31, 2020
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	575,329	$	(3,728)	$	18,527	$	(815)	$	593,856	$	(4,543)
Other asset-backed securities	143,764		(2,076)		70		—		143,834		(2,076)
State and municipal securities	86,471		(592)		—		—		86,471		(592)
U.S. government agency and government-sponsored enterprise securities	74,943		(57)		—		—		74,943		(57)
Total	$	880,507	$	(6,453)	$	18,597	$	(815)	$	899,104	$	(7,268)

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Loans (Tables)

6 Months Ended

Jun. 30, 2021

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, 2021		December 31, 2020
	(dollars in thousands)
Commercial loans:
Commercial real estate	$	4,101,071	$	4,062,313
Commercial business	3,738,288		3,597,968
Agriculture	797,580		779,627
Construction	300,303		268,663
Consumer loans:
One-to-four family residential real estate	724,151		683,570
Other consumer	31,723		35,519
Total loans	9,693,116		9,427,660
Less: Allowance for credit losses	(142,988)		(149,140)
Total loans, net	$	9,550,128	$	9,278,520

Analysis of the Aged Loan Portfolio

The following is an aging of the recorded investment of the loan portfolio at the dates presented:

	Current Loans		30 - 59 Days Past Due		60 - 89 Days Past Due		Greater than 90 Days Past Due		Total Past Due		Nonaccrual Loans		Total Loans
June 30, 2021	(in thousands)
Commercial loans:
Commercial real estate	$	4,089,659	$	8,244	$	149	$	—	$	8,393	$	3,019	$	4,101,071
Commercial business	3,724,202		2,351		990		—		3,341		10,745		3,738,288
Agriculture	785,071		2,537		938		—		3,475		9,034		797,580
Construction	300,303		—		—		—		—		—		300,303
Consumer loans:
One-to-four family residential real estate	720,854		775		1,343		—		2,118		1,179		724,151
Other consumer	31,658		20		1		—		21		44		31,723
Total	$	9,651,747	$	13,927	$	3,421	$	—	$	17,348	$	24,021	$	9,693,116
	Current Loans		30 - 59 Days Past Due		60 - 89 Days Past Due		Greater than 90 Days Past Due		Total Past Due		Nonaccrual Loans		Total Loans
December 31, 2020	(in thousands)
Commercial loans:
Commercial real estate	$	4,037,309	$	17,292	$	—	—		$	17,292	$	7,712	$	4,062,313
Commercial business	3,578,905		1,282		4,559		—		5,841		13,222		3,597,968
Agriculture	767,102		911		—		—		911		11,614		779,627
Construction	268,304		—		142		—		142		217		268,663
Consumer loans:
One-to-four family residential real estate	677,627		2,283		1,659		—		3,942		2,001		683,570
Other consumer	35,450		24		5		—		29		40		35,519
Total	$	9,364,697	$	21,792	$	6,365	$	—	$	28,157	$	34,806	$	9,427,660

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,
	2021		2020		2021		2020
	(in thousands)
Commercial loans	$	212	$	665	$	424	$	1,448
Consumer loans	2		8		9		13
Total	$	214	$	673	$	433	$	1,461

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, 2021		December 31, 2020
	(in thousands)
Commercial loans:
Commercial real estate	$	942	$	6,393
Commercial business	6,125		6,382
Agriculture	6,744		8,136
Total	$	13,811	$	20,911

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, 2021					Three Months Ended June 30, 2020
	Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
	(dollars in thousands)
Commercial loans:
Commercial business	4	$	1,757	$	1,757	4	$	1,690	$	1,690
Consumer loans:
One-to-four family residential real estate	—	—		—		1	128		128
Total	4	$	1,757	$	1,757	5	$	1,818	$	1,818

	Six Months Ended June 30, 2021					Six Months Ended June 30, 2020
	Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Number of TDR Modifications	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
	(dollars in thousands)
Commercial loans:
Commercial real estate	1	$	628	$	628	—	$	—	$	—
Commercial business	11	2,600		2,600		6	1,962		1,962
Agriculture	—	—		—		1	895		895
Consumer loans:
One-to-four family residential real estate	2	140		140		2	196		196
Total	14	$	3,368	$	3,368	9	$	3,053	$	3,053

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Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit (Tables)

6 Months Ended

Jun. 30, 2021

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 (Recapture)		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 (Recapture)		Ending Balance
Six Months Ended June 30, 2021	(in thousands)
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

	Beginning Balance		Charge-offs		Recoveries		Provision (Recapture)		Ending Balance
Three Months Ended June 30, 2020	(in thousands)
Commercial loans:
Commercial real estate	$	37,122	$	—	$	13	$	13,098	$	50,233
Commercial business	45,570		(5,442)		811		12,247		53,186
Agriculture	11,085		—		1		3,782		14,868
Construction	8,845		—		235		(1,127)		7,953
Consumer loans:
One-to-four family residential real estate	17,659		—		422		5,630		23,711
Other consumer	1,644		(198)		130		19		1,595
Unallocated	149		—		—		(149)		—
Total	$	122,074	$	(5,640)	$	1,612	$	33,500	$	151,546

	Beginning Balance		Impact of Adopting ASC 326		Charge-offs		Recoveries		Provision (Recapture)		Ending Balance
Six Months Ended June 30, 2020	(in thousands)
Commercial loans:
Commercial real estate	$	20,340	$	7,533	$	(101)	$	27	$	22,434	$	50,233
Commercial business	30,292		762		(7,126)		1,671		27,587		53,186
Agriculture	15,835		(9,325)		(4,726)		42		13,042		14,868
Construction	8,571		(1,750)		—		677		455		7,953
Consumer loans:
One-to-four family residential real estate	7,435		4,237		(10)		704		11,345		23,711
Other consumer	883		778		(466)		254		146		1,595
Unallocated	612		(603)		—		—		(9)		—
Total	83,968		1,632		(12,429)		3,375		75,000		151,546

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,
	2021		2020		2021		2020
	(in thousands)
Beginning balance	$	9,800	$	6,000	$	8,300	$	3,430
Impact of adopting ASC 326	—		—		—		1,570
Net changes in the allowance for unfunded commitments and letters of credit	200		2,800		1,700		3,800
Ending balance	$	10,000	$	8,800	$	10,000	$	8,800

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
	2021		2020		2019		2018		2017		Prior						Total (1)
June 30, 2021	(in thousands)
Commercial loans:
Commercial real estate
Pass	$	389,826	$	648,251	$	584,280	$	443,700	$	452,989	$	1,163,730	$	57,550	$	2,775	$	3,743,101
Special mention	1,875		10,168		58,636		21,408		26,722		60,889		—		2,195		181,893
Substandard	507		3,917		43,600		10,882		28,362		87,655		1,154		—		176,077
Total commercial real estate	$	392,208	$	662,336	$	686,516	$	475,990	$	508,073	$	1,312,274	$	58,704	$	4,970	$	4,101,071
Commercial business
Pass	$	881,501	$	585,999	$	325,418	$	245,432	$	163,134	$	316,525	$	980,429	$	16,876	$	3,515,314
Special mention	—		1,243		8,311		6,293		4,955		990		43,386		251		65,429
Substandard	336		5,808		24,959		29,854		22,175		31,814		41,282		1,317		157,545
Total commercial business	$	881,837	$	593,050	$	358,688	$	281,579	$	190,264	$	349,329	$	1,065,097	$	18,444	$	3,738,288
Agriculture
Pass	$	97,908	$	95,853	$	82,533	$	37,066	$	54,739	$	102,476	$	259,260	$	1,744	$	731,579
Special mention	109		4,593		738		325		64		—		4,526		—		10,355
Substandard	—		6,343		10,045		1,643		3,862		2,529		30,317		907		55,646
Total agriculture	$	98,017	$	106,789	$	93,316	$	39,034	$	58,665	$	105,005	$	294,103	$	2,651	$	797,580
Construction
Pass	$	115,216	$	101,292	$	19,352	$	6,699	$	3,448	$	4,897	$	30,302	$	304	$	281,510
Substandard	—		—		18,739		—		—		54		—		—		18,793
Total construction	$	115,216	$	101,292	$	38,091	$	6,699	$	3,448	$	4,951	$	30,302	$	304	$	300,303
Consumer loans:
One-to-four family residential real estate
Pass	$	130,355	$	146,145	$	58,921	$	49,106	$	23,838	$	81,118	$	227,230	$	622	$	717,335
Special mention	—		2,350		—		—		314		—		—		—		2,664
Substandard	—		81		1,201		239		172		2,132		172		155		4,152
Total one-to-four family real estate	$	130,355	$	148,576	$	60,122	$	49,345	$	24,324	$	83,250	$	227,402	$	777	$	724,151
Other consumer
Pass	$	4,289	$	3,294	$	2,270	$	1,789	$	671	$	1,122	$	18,006	$	192	$	31,633
Substandard	—		25		38		—		2		2		23		—		90
Total consumer	$	4,289	$	3,319	$	2,308	$	1,789	$	673	$	1,124	$	18,029	$	192	$	31,723
Total	$	1,621,922	$	1,615,362	$	1,239,041	$	854,436	$	785,447	$	1,855,933	$	1,693,637	$	27,338	$	9,693,116
Less:
Allowance for credit losses																	142,988
Loans, net																	$	9,550,128

__________

(1) Loans that are on short-term deferments are treated as Pass loans and will not be reported as past due provided that they are performing in accordance with the modified terms.

													Revolving Loans Amortized Cost Basis		Revolving Loans Converted to Term Loans Amortized Cost Basis
	Term Loans
	Amortized Cost Basis by Origination Year
	2020		2019		2018		2017		2016		Prior						Total
December 31, 2020	(in thousands)
Commercial loans:
Commercial real estate
Pass	$	674,444	$	645,328	$	478,881	$	502,112	$	408,972	$	946,980	$	52,049	$	11,332	$	3,720,098
Special mention	3,348		39,374		21,285		30,232		46,197		50,115		5		2,139		192,695
Substandard	2,916		24,860		13,571		15,652		43,735		41,138		3,389		4,259		149,520
Total commercial real estate	$	680,708	$	709,562	$	513,737	$	547,996	$	498,904	$	1,038,233	$	55,443	$	17,730	$	4,062,313
Commercial business
Pass	$	1,087,400	$	366,435	$	324,360	$	199,010	$	218,313	$	214,677	$	1,000,725	$	11,540	$	3,422,460
Special mention	3,002		26,361		8,471		24,582		7,004		10,650		22,426		—		102,496
Substandard	3,625		7,376		11,061		5,905		6,396		3,743		32,134		2,772		73,012
Total commercial business	$	1,094,027	$	400,172	$	343,892	$	229,497	$	231,713	$	229,070	$	1,055,285	$	14,312	$	3,597,968
Agriculture
Pass	$	142,163	$	90,612	$	44,434	$	58,366	$	58,893	$	59,396	$	244,135	$	9,299	$	707,298
Special mention	—		90		285		33		—		—		85		13		506
Substandard	5,193		12,480		5,868		4,258		284		3,502		38,780		1,458		71,823
Total agriculture	$	147,356	$	103,182	$	50,587	$	62,657	$	59,177	$	62,898	$	283,000	$	10,770	$	779,627
Construction
Pass	$	134,693	$	66,974	$	10,066	$	3,498	$	763	$	1,805	$	29,323	$	3,753	$	250,875
Substandard	—		17,732		—		—		—		56		—		—		17,788
Total construction	$	134,693	$	84,706	$	10,066	$	3,498	$	763	$	1,861	$	29,323	$	3,753	$	268,663
Consumer loans:
One-to-four family real estate
Pass	$	161,021	$	77,756	$	62,696	$	29,737	$	20,889	$	78,098	$	243,325	$	3,655	$	677,177
Special mention	—		—		332		—		—		195		—		—		527
Substandard	—		849		227		1,166		344		1,968		1,005		307		5,866
Total one-to-four family real estate	$	161,021	$	78,605	$	63,255	$	30,903	$	21,233	$	80,261	$	244,330	$	3,962	$	683,570
Other consumer
Pass	$	5,548	$	3,109	$	3,886	$	989	$	244	$	1,060	$	19,911	$	474	$	35,221
Substandard	30		—		—		5		—		170		53		40		298
Total consumer	$	5,578	$	3,109	$	3,886	$	994	$	244	$	1,230	$	19,964	$	514	$	35,519
Total	$	2,223,383	$	1,379,336	$	985,423	$	875,545	$	812,034	$	1,413,553	$	1,687,345	$	51,041	$	9,427,660
Less:
Allowance for credit losses																	149,140
Loans, net																	$	9,278,520

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Other Real Estate Owned (Tables)

6 Months Ended

Jun. 30, 2021

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,
	2021		2020		2021		2020
	(in thousands)
Balance, beginning of period	$	521	$	510	$	553	$	552
Transfers in	—		558		—		558
Valuation adjustments	(140)		—		(140)		—
Proceeds from sale of OREO property	—		(303)		(132)		(345)
Gain (loss) on sale of OREO, net	—		(18)		100		(18)
Balance, end of period	$	381	$	747	$	381	$	747

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Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2021

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,
	2021		2020		2021		2020
	(in thousands)
Goodwill
Total goodwill	$	765,842	$	765,842	$	765,842	$	765,842
Other intangible assets, net
CDI:
Gross CDI balance at beginning of period	105,473		105,473		105,473		105,473
Accumulated amortization at beginning of period	(81,582)		(73,244)		(79,658)		(70,934)
CDI, net at beginning of period	23,891		32,229		25,815		34,539
CDI current period amortization	(1,852)		(2,210)		(3,776)		(4,520)
Total CDI, net at end of period	22,039		30,019		22,039		30,019
Intangible assets not subject to amortization	919		919		919		919
Other intangible assets, net at end of period	22,958		30,938		22,958		30,938
Total goodwill and other intangible assets at end of period	$	788,800	$	796,780	$	788,800	$	796,780

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, 2021 and the succeeding four years:

	Year ending December 31,
	(in thousands)
2021	$	3,488
2022	5,880
2023	4,552
2024	3,432
2025	2,415

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Derivatives and Balance Sheet Offsetting (Tables)

6 Months Ended

Jun. 30, 2021

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, 2021			December 31, 2020			June 30, 2021			December 31, 2020
	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
	(in thousands)
Derivatives not designated as hedging instruments:
Interest rate lock commitments	Other assets	$	585	Other assets	$	1,096	Other liabilities	$	—	Other liabilities	$	—
Interest rate forward loan sales contracts	Other assets	$	—	Other assets	$	—	Other liabilities	$	23	Other liabilities	$	165
Interest rate swap contracts	Other assets	$	32,546	Other assets	$	46,184	Other liabilities	$	32,853	Other liabilities	$	46,637

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:

	Amount of Gain or (Loss) Recognized in Accumulated Other Comprehensive Income on Derivative				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,					Three Months Ended June 30,
	2021		2020			2021		2020
	(in thousands)
Interest rate collar	$	—	$	3,402	Interest income	$	2,602	$	2,190
	Six Months Ended June 30,					Six Months Ended June 30,
	2021		2020			2021		2020
Interest rate collar	$	—	$	26,825	Interest income	$	5,178	$	3,130

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,
	2021		2020		2021		2020
	(in thousands)
Interest rate lock commitments	$	(340)	$	—	$	(511)	$	—
Interest rate forward loan sales contracts	(527)		—		143		—
Interest rate swap contracts	(40)		(473)		72		(473)
Total derivative gains (losses)	$	(907)	$	(473)	$	(296)	$	(473)

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, 2021	(in thousands)
Assets
Interest rate swap contracts	$	32,546	$	—	$	32,546	$	(430)	$	32,116
Liabilities
Interest rate swap contracts	$	32,853	$	—	$	32,853	$	(30,167)	$	2,686
Repurchase agreements	$	70,994	$	—	$	70,994	$	(70,994)	$	—
December 31, 2020
Assets
Interest rate swap contracts	$	46,184	$	—	$	46,184	$	—	$	46,184
Liabilities
Interest rate swap contracts	$	46,637	$	—	$	46,637	$	(46,637)	$	—
Repurchase agreements	$	73,859	$	—	$	73,859	$	(73,859)	$	—

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, 2021	(in thousands)
Class of collateral pledged for repurchase agreements
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	70,994	$	—	$	—	$	—	$	70,994
Gross amount of recognized liabilities for repurchase agreements									70,994
Amounts related to agreements not included in offsetting disclosure									$	—

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Shareholders' Equity Dividends Declared (Tables)

6 Months Ended

Jun. 30, 2021

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 28, 2021	$	0.28	February 10, 2021	February 24, 2021
April 29, 2021	$	0.28	May 12, 2021	May 26, 2021

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Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2021

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, 2021	(in thousands)
Beginning balance	$	60,569	$	(5,718)	$	22,877	$	77,728
Other comprehensive income (loss) 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
Three Months Ended June 30, 2020
Beginning balance	$	112,543	$	(3,894)	$	28,558	$	137,207
Other comprehensive income before reclassifications	42,860		—		2,611		45,471
Amounts reclassified from accumulated other comprehensive income (2)	—		79		(1,680)		(1,601)
Net current-period other comprehensive income	42,860		79		931		43,870
Ending balance	$	155,403	$	(3,815)	$	29,489	$	181,077
Six Months Ended June 30, 2021
Beginning balance	$	163,174	$	(5,833)	$	24,854	$	182,195
Other comprehensive income (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
Six Months Ended June 30, 2020
Beginning balance	$	33,038	$	(3,974)	$	11,303	$	40,367
Other comprehensive income before reclassifications	122,556		—		20,588		143,144
Amounts reclassified from accumulated other comprehensive income (2)	(191)		159		(2,402)		(2,434)
Net current-period other comprehensive income	122,365		159		18,186		140,710
Ending balance	$	155,403	$	(3,815)	$	29,489	$	181,077

__________

(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
	2021		2020		2021		2020		Statement of Income
	(in thousands)
Unrealized gains on available for sale debt securities	$	314	$	—	$	314	$	249	Investment securities gains, net
Amortization of unrealized gains related to securities transfer	450		—		450		—		Loan interest income
	764		—		764		249		Total before tax
	(178)		—		(178)		(58)		Income tax provision
	$	586	$	—	$	586	$	191	Net of tax
Amortization of pension plan liability actuarial losses	$	(149)	$	(103)	$	(299)	$	(207)	Compensation and employee benefits
	(149)		(103)		(299)		(207)		Total before tax
	34		24		69		48		Income tax provision
	$	(115)	$	(79)	$	(230)	$	(159)	Net of tax
Unrealized gains from hedging instruments	$	2,602	$	2,190	$	5,178	$	3,130	Loans
	2,602		2,190		5,178		3,130		Total before tax
	(604)		(510)		(1,203)		(728)		Income tax provision
	$	1,998	$	1,680	$	3,975	$	2,402	Net of tax

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Fair Value Accounting and Measurement (Tables)

6 Months Ended

Jun. 30, 2021

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 table sets 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, 2021	(in thousands)
Assets
Debt securities available for sale:
U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	2,737,200	$	—	$	2,737,200	$	—
Other asset-backed securities	432,314		—		432,314		—
State and municipal securities	764,060		—		764,060		—
U.S. government agency and government-sponsored enterprise securities	256,492		—		256,492		—
Total debt securities available for sale	$	4,190,066	$	—	$	4,190,066	$	—
Loans held for sale	$	14,413	$	—	$	14,413	$	—
Other assets:
Interest rate lock commitments	$	585	$	—	$	—	$	585
Interest rate contracts	$	32,546	$	—	$	32,546	$	—
Liabilities
Other liabilities:
Interest rate forward loan sales contracts	$	23	$	—	$	23	$	—
Interest rate contracts	$	32,853	$	—	$	32,853	$	—

	Fair Value		Fair Value Measurements at Reporting Date Using
			Level 1		Level 2		Level 3
December 31, 2020	(in thousands)
Assets
Debt securities available for sale:
U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	3,814,387	$	—	$	3,814,387	$	—
Other asset-backed securities	357,479		—		357,479		—
State and municipal securities	753,572		—		753,572		—
U.S. government agency and government-sponsored enterprise securities	284,696		—		284,696		—
Total debt securities available for sale	$	5,210,134	$	—	$	5,210,134	$	—
Loans held for sale	$	14,760	$	—	$	14,760	$	—
Other assets:
Interest rate lock commitments	$	1,096	$	—	$	—	$	1,096
Interest rate contracts	$	46,184	$	—	$	46,184	$	—
Liabilities
Other liabilities:
Interest rate forward loan sales contracts	$	165	$	—	$	165	$	—
Interest rate contracts	$	46,637	$	—	$	46,637	$	—

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,
	2021		2020		2021		2020
	(in thousands)
Balance at the beginning of the period	$	925	$	—	$	1,096	$	—
Change included in earnings	2,134		—		3,844		—
Settlements	(2,474)		—		(4,355)		—
Balance at the end of the period	$	585	$	—	$	585	$	—

Equity Securities without Readily Determinable Fair Value

The following table presents the carrying value of equity securities, without readily determinable fair values, still held as of June 30, 2021, that are measured under the measurement alternative and related adjustments recorded during the periods presented for those securities with observable price changes. These securities are included in the nonrecurring fair value tables when applicable price changes are observable.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
Equity securities without readily determinable fair values	(in thousands)
Carrying value, beginning of period	$	13,425	$	—	$	13,425	$	—
Upward carrying value changes	—		13,425		—		13,425
Carrying value, end of period	$	13,425	$	13,425	$	13,425	$	13,425

Financial Assets Accounted For Fair Value On Nonrecurring Basis

The following tables set forth information related to the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the current and prior year quarterly periods:

	Fair Value at June 30, 2021		Fair Value Measurements  at Reporting Date Using						Losses During the Three Months Ended June 30, 2021		Losses During the Six Months Ended 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 at June 30, 2020		Fair Value Measurements  at Reporting Date Using						Gains (Losses) During the Three Months Ended June 30, 2020		Gains (Losses) During the Six Months Ended June 30, 2020
			Level 1		Level 2		Level 3
	(in thousands)
Collateral dependent loans	$	7,976	$	—	$	—	$	7,976	$	(6,946)	$	(7,745)
Equity securities	$	13,425	$	—	$	—	$	13,425	$	13,425	$	13,425

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, 2021
	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Assets
Cash and due from banks	$	218,649	$	218,649	$	218,649	$	—	$	—
Interest-earning deposits with banks	612,883		612,883		612,883		—		—
Debt securities available for sale	4,190,066		4,190,066		—		4,190,066		—
Debt securities held to maturity	2,024,715		2,032,980		—		2,032,980		—
FHLB stock	10,280		10,280		—		10,280		—
Loans held for sale	13,179		13,179		—		13,179		—
Loans	9,550,128		9,955,668		—		—		9,955,668
Interest rate contracts	32,546		32,546		—		32,546		—
Interest rate lock commitments	585		585		—		—		585
Liabilities
Time deposits	$	327,882	$	326,735	$	—	$	326,735	$	—
FHLB advances	7,386		8,878		—		8,878		—
Repurchase agreements	70,994		70,994		—		70,994		—
Subordinated debentures	35,000		35,171		—		35,171		—
Interest rate contracts	32,853		32,853		—		32,853		—
Interest rate forward loan sales contracts	23		23		—		23		—

	December 31, 2020
	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Assets
Cash and due from banks	$	218,899	$	218,899	$	218,899	$	—	$	—
Interest-earning deposits with banks	434,867		434,867		434,867		—		—
Debt securities available for sale	5,210,134		5,210,134		—		5,210,134		—
FHLB stock	10,280		10,280		—		10,280		—
Loans held for sale	26,481		26,481		—		26,481		—
Loans	9,278,520		9,720,592		—		—		9,720,592
Interest rate contracts	46,184		46,184		—		46,184		—
Interest rate lock commitments	1,096		1,096		—		—		1,096
Liabilities
Time deposits	$	338,845	$	338,815	$	—	$	338,815	$	—
FHLB advances and FRB borrowings	7,414		9,295		—		9,295		—
Repurchase agreements	73,859		73,859		—		73,859		—
Subordinated debentures	35,092		35,414		—		35,414		—
Interest rate contracts	46,637		46,637		—		46,637		—
Interest rate forward loan sales contracts	165		165		—		165		—

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, 2021						December 31, 2020
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)
$	14,413	$	14,050	$	363	$	14,760	$	14,252	$	508

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 fixed and intangible assets).

(2) Collateral consists of intangible assets, fixed assets and real estate.

	Fair Value at June 30, 2020		Valuation Technique	Unobservable Input	Range (Weighted Average) (1)
	(dollars in thousands)
Collateral dependent loans (2)	$	7,976	Fair Market Value of Collateral	Adjustment to Stated Value	0.00% - 100.00% (56.22%)

__________

(1) Discount applied to appraised value or stated value (in the case of accounts receivable, fixed assets and inventory).

(2) Collateral consists of cash, accounts receivable, fixed assets, inventory and real estate.

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, 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%)

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Earnings per Common Share (Tables)

6 Months Ended

Jun. 30, 2021

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,
	2021		2020		2021		2020
	(in thousands except per share amounts)
Basic EPS:
Net income	$	55,039	$	36,582	$	106,892	$	51,210
Less: Earnings allocated to participating securities:
Nonvested restricted shares	70		139		227		325
Earnings allocated to common shareholders	$	54,969	$	36,443	$	106,665	$	50,885
Weighted average common shares outstanding	70,987		70,679		70,924		70,942
Basic earnings per common share	$	0.77	$	0.52	$	1.50	$	0.72
Diluted EPS:
Earnings allocated to common shareholders	$	54,969	$	36,443	$	106,665	$	50,885
Weighted average common shares outstanding	70,987		70,679		70,924		70,942
Dilutive effect of equity awards	177		32		155		39
Weighted average diluted common shares outstanding	71,164		70,711		71,079		70,981
Diluted earnings per common share	$	0.77	$	0.52	$	1.50	$	0.72
Potentially dilutive RSAs and RSUs that were not included in the computation of diluted EPS because to do so would be anti-dilutive	248		571		158		450

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Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2021

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue [Table Text Block]

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,
	2021		2020		2021		2020
	(in thousands)
Noninterest income:
Revenue from contracts with customers:
Deposit account and treasury management fees	$	6,701	$	6,092	$	13,059	$	13,880
Card revenue	4,773		3,079		8,506		6,597
Financial services and trust revenue	4,245		3,163		7,626		6,228
Total revenue from contracts with customers	15,719		12,334		29,191		26,705
Other sources of noninterest income	7,011		24,925		16,705		31,761
Total noninterest income	$	22,730	$	37,259	$	45,896	$	58,466

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Securities (Debt securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, [Line Items]
Debt securities available-for-sale, amortized cost	$ 4,103,196	$ 4,997,529
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	103,979	219,873
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(17,109)	(7,268)
Debt securities available for sale at fair value	4,190,066	5,210,134
Debt Securities, Held-to-Maturity, Amortized Cost	2,024,715	0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	9,586
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	1,321
Debt Securities, Held-to-maturity, Fair Value	2,032,980	0
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	2,671,827	3,640,351
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	74,715	178,579
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(9,342)	(4,543)
Debt securities available for sale at fair value	2,737,200	3,814,387
Debt Securities, Held-to-Maturity, Amortized Cost	2,024,715
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	9,586
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	1,321
Debt Securities, Held-to-maturity, Fair Value	2,032,980
Asset-backed Securities [Member]
Debt Securities, [Line Items]
Debt securities available-for-sale, amortized cost	429,983	349,904
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	6,307	9,651
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(3,976)	(2,076)
Debt securities available for sale at fair value	432,314	357,479
State and Municipal Securities [Member]
Debt Securities, [Line Items]
Debt securities available-for-sale, amortized cost	748,224	729,066
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	18,294	25,098
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(2,458)	(592)
Debt securities available for sale at fair value	764,060	753,572
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Debt Securities, [Line Items]
Debt securities available-for-sale, amortized cost	253,162	278,208
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	4,663	6,545
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(1,333)	(57)
Debt securities available for sale at fair value	$ 256,492	$ 284,696

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Securities (Summary of Gross Realized Gains and Gross Realized Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Proceeds from Sale of Debt Securities, Available-for-sale	$ 26,914	$ 0	$ 26,914	$ 194,105
Gross Realized Gains from sales of debt securities available for sale	751	0	751	435
Gross Realized Losses from sales of debt securities available for sale	(437)	0	(437)	(186)
Other securities gains	0	16,425	0	16,425
Investment securities gain (loss), net	$ 314	$ 16,425	$ 314	$ 16,674

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Securities (Summary of Gross Unrealized Gains and Gross Unrealized Losses on Equity Securities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Gains recognized during the period on equity securities	$ 0	$ 16,425	$ 0	$ 16,425
Less: Gains recognized during the period on equity securities sold during the period	0	3,000	0	3,000
Unrealized gains recognized during the reporting period on equity securities still held at the reporting date	$ 0	$ 13,425	$ 0	$ 13,425

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Securities (Schedule of Contractual Maturities of Investment Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One	$ 57,266
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five	751,065
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	1,531,719
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10	1,763,146
Debt securities available-for-sale, amortized cost	4,103,196	$ 4,997,529
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One	57,900
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	779,527
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	1,578,489
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10	1,774,150
Debt securities available for sale at fair value	4,190,066	5,210,134
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	26,224
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year Five through Ten	1,241,524
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10	756,967
Debt Securities, Held-to-Maturity, Amortized Cost	2,024,715	0
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	26,163
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	1,248,569
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10	758,248
Debt Securities, Held-to-maturity, Fair Value	$ 2,032,980	$ 0

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Securities (Carrying Value of Securities Pledged as Collateral) (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 780,201
To secure public funds
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	492,636
To secure borrowings
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	100,289
Other securities pledged
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 187,276

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Securities (Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	$ 1,413,001	$ 880,507
Less than 12 Months Unrealized Losses	(16,707)	(6,453)
12 Months or More Fair Value	25,010	18,597
12 Months or More Unrealized Losses	(402)	(815)
Total Fair Value	1,438,011	899,104
Total Unrealized Losses	(17,109)	(7,268)
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	807,523	575,329
Less than 12 Months Unrealized Losses	(8,956)	(3,728)
12 Months or More Fair Value	23,308	18,527
12 Months or More Unrealized Losses	(386)	(815)
Total Fair Value	830,831	593,856
Total Unrealized Losses	(9,342)	(4,543)
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	232,155	143,764
Less than 12 Months Unrealized Losses	(3,976)	(2,076)
12 Months or More Fair Value	55	70
12 Months or More Unrealized Losses	0	0
Total Fair Value	232,210	143,834
Total Unrealized Losses	(3,976)	(2,076)
State and Municipal Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	223,105	86,471
Less than 12 Months Unrealized Losses	(2,443)	(592)
12 Months or More Fair Value	1,647	0
12 Months or More Unrealized Losses	(15)	0
Total Fair Value	224,752	86,471
Total Unrealized Losses	(2,458)	(592)
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	150,218	74,943
Less than 12 Months Unrealized Losses	(1,332)	(57)
12 Months or More Fair Value	0	0
12 Months or More Unrealized Losses	(1)	0
Total Fair Value	150,218	74,943
Total Unrealized Losses	$ (1,333)	$ (57)

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Securities (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) security shares	Jun. 30, 2020 USD ($) shares	Jun. 30, 2021 USD ($) security shares	Jun. 30, 2020 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Debt Securities, Available-for-sale [Line Items]
Securities transfer from AFS to HTM, fair value			$ 2,012,123	$ 0
Debt Securities, Held-to-maturity, Allowance for Credit Loss	$ 0		0			$ 0
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Interest receivable	$ 52,347		$ 52,347			54,831
Visa Class B shares, shares sold | shares		17,360
Visa Class B shares, remaining shares | shares	77,683		77,683
Equity Securities	$ 13,425	$ 13,425	$ 13,425	$ 13,425	$ 13,425	13,425	$ 0	$ 0
Available-for-sale Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Interest receivable	15,100		15,100			17,100
Held-to-maturity Securities
Debt Securities, Available-for-sale [Line Items]
Interest receivable	4,200		$ 4,200			$ 0
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Securities transfer from AFS to HTM, fair value	2,010,000
Unrealized gain on AFS securities transferred to HTM, net of tax	$ 15,500
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	77		77
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	18		18
State and Municipal Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	66		66
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	9		9

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Loans (Analysis of Loan Portfolio by Major Types of Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 9,693,116		$ 9,427,660
Financing Receivable, Allowance for Credit Loss	(142,988)	$ (148,294)	(149,140)	$ (151,546)	$ (122,074)	$ (83,968)
Loans and Leases Receivable, Net Amount	9,550,128		9,278,520
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	4,101,071		4,062,313
Financing Receivable, Allowance for Credit Loss	(53,250)	(57,050)	(68,934)	(50,233)	(37,122)	(20,340)
Commercial Business [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,738,288		3,597,968
Financing Receivable, Allowance for Credit Loss	(57,554)	(58,405)	(45,250)	(53,186)	(45,570)	(30,292)
Agriculture [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	797,580		779,627
Financing Receivable, Allowance for Credit Loss	(7,920)	(9,487)	(9,052)	(14,868)	(11,085)	(15,835)
Construction [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	300,303		268,663
Financing Receivable, Allowance for Credit Loss	(6,559)	(6,551)	(7,636)	(7,953)	(8,845)	(8,571)
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	724,151		683,570
Financing Receivable, Allowance for Credit Loss	(16,519)	(15,638)	(16,875)	(23,711)	(17,659)	(7,435)
Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Loans and Leases Receivable, Net of Deferred Income	31,723		35,519
Financing Receivable, Allowance for Credit Loss	$ (1,186)	$ (1,163)	$ (1,393)	$ (1,595)	$ (1,644)	$ (883)

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Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 24,021	$ 34,806
Total Loans	9,693,116	9,427,660
Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	3,019	7,712
Total Loans	4,101,071	4,062,313
Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	10,745	13,222
Total Loans	3,738,288	3,597,968
Agriculture [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	9,034	11,614
Total Loans	797,580	779,627
Construction [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	0	217
Total Loans	300,303	268,663
One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	1,179	2,001
Total Loans	724,151	683,570
Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	44	40
Total Loans	31,723	35,519
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	9,651,747	9,364,697
Financial Asset, Not Past Due | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	4,089,659	4,037,309
Financial Asset, Not Past Due | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	3,724,202	3,578,905
Financial Asset, Not Past Due | Agriculture [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	785,071	767,102
Financial Asset, Not Past Due | Construction [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	300,303	268,304
Financial Asset, Not Past Due | One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	720,854	677,627
Financial Asset, Not Past Due | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	31,658	35,450
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	13,927	21,792
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	8,244	17,292
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	2,351	1,282
Financial Asset, 30 to 59 Days Past Due [Member] | Agriculture [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	2,537	911
Financial Asset, 30 to 59 Days Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	775	2,283
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	20	24
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	3,421	6,365
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	149	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	990	4,559
Financial Asset, 60 to 89 Days Past Due [Member] | Agriculture [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	938	0
Financial Asset, 60 to 89 Days Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	142
Financial Asset, 60 to 89 Days Past Due [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	1,343	1,659
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	1	5
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	17,348	28,157
Financial Asset, Past Due | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	8,393	17,292
Financial Asset, Past Due | Commercial Business [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	3,341	5,841
Financial Asset, Past Due | Agriculture [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	3,475	911
Financial Asset, Past Due | Construction [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	0	142
Financial Asset, Past Due | One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	2,118	3,942
Financial Asset, Past Due | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	$ 21	$ 29

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Loans (Interest written off on nonaccual loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Financing Receivable, Credit Quality Indicator - nonaccrual loans written off interest [Line Items]
Financing Receivable Accrued Interest Reversed Through Interest Income	$ 214	$ 673	$ 433	$ 1,461
Commercial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator - nonaccrual loans written off interest [Line Items]
Financing Receivable Accrued Interest Reversed Through Interest Income	212	665	424	1,448
Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator - nonaccrual loans written off interest [Line Items]
Financing Receivable Accrued Interest Reversed Through Interest Income	$ 2	$ 8	$ 9	$ 13

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Loans (Analysis of Nonaccrual Loans with no ACL) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	$ 13,811	$ 20,911
Commercial Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	942	6,393
Commercial Business [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	6,125	6,382
Agriculture [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	$ 6,744	$ 8,136

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Loans Loans (Analysis of Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) Modifications	Jun. 30, 2020 USD ($) Modifications	Jun. 30, 2021 USD ($) Modifications	Jun. 30, 2020 USD ($) Modifications
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	4	5	14	9
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 1,757	$ 1,818	$ 3,368	$ 3,053
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 1,757	$ 1,818	$ 3,368	$ 3,053
Commercial Real Estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications			1	0
Financing Receivable, Troubled Debt Restructuring, Premodification			$ 628	$ 0
Financing Receivable, Troubled Debt Restructuring, Postmodification			$ 628	$ 0
Commercial Business [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	4	4	11	6
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 1,757	$ 1,690	$ 2,600	$ 1,962
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 1,757	$ 1,690	$ 2,600	$ 1,962
Agriculture [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications			0	1
Financing Receivable, Troubled Debt Restructuring, Premodification			$ 0	$ 895
Financing Receivable, Troubled Debt Restructuring, Postmodification			$ 0	$ 895
One-to-Four Family Residential [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	0	1	2	2
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 0	$ 128	$ 140	$ 196
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 128	$ 140	$ 196

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Loans (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) contract	Jun. 30, 2020 contract	Jun. 30, 2021 USD ($) contract	Jun. 30, 2020 contract	Dec. 31, 2020 USD ($)
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Interest Receivable, loans	$ 52,347		$ 52,347		$ 54,831
Financing Receivable Modifications Additional Commitment To Lend	$ 988		$ 988		651
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract	0	0	0	0
Loan modifications, short-term deferments not classified as TDR, Number of contracts | contract			10
Loan modifications, short-term deferments not classified as TDR, net of unearned income			$ 40,700
Paycheck Protection Program (PPP) loans, net of unearned income	$ 691,900		691,900
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	3,560,000		3,560,000		3,460,000
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		200,300		200,400
Loans [Member]
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items]
Interest Receivable, loans	$ 33,100		$ 33,100		$ 37,800

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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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	$ 142,988	$ 151,546	$ 142,988	$ 151,546	$ 148,294	$ 149,140	$ 122,074		$ 83,968
Financing Receivable, Allowance for Credit Loss, Writeoff	(1,940)	(5,640)	(5,406)	(12,429)
Financing Receivable, Allowance for Credit Loss, Recovery	2,134	1,612	5,554	3,375
Provision (recapture) for credit losses	(5,500)	33,500	(6,300)	75,000
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	53,250	50,233	53,250	50,233	57,050	68,934	37,122		20,340
Financing Receivable, Allowance for Credit Loss, Writeoff	(316)	0	(316)	(101)
Financing Receivable, Allowance for Credit Loss, Recovery	16	13	52	27
Provision (recapture) for credit losses	(3,500)	13,098	(15,420)	22,434
Commercial Business [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	57,554	53,186	57,554	53,186	58,405	45,250	45,570		30,292
Financing Receivable, Allowance for Credit Loss, Writeoff	(971)	(5,442)	(4,310)	(7,126)
Financing Receivable, Allowance for Credit Loss, Recovery	874	811	4,088	1,671
Provision (recapture) for credit losses	(754)	12,247	12,526	27,587
Agriculture [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	7,920	14,868	7,920	14,868	9,487	9,052	11,085		15,835
Financing Receivable, Allowance for Credit Loss, Writeoff	(122)	0	(122)	(4,726)
Financing Receivable, Allowance for Credit Loss, Recovery	5	1	17	42
Provision (recapture) for credit losses	(1,450)	3,782	(1,027)	13,042
Construction [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	6,559	7,953	6,559	7,953	6,551	7,636	8,845		8,571
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	521	235	567	677
Provision (recapture) for credit losses	(513)	(1,127)	(1,644)	455
One-to-Four Family Residential [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	16,519	23,711	16,519	23,711	15,638	16,875	17,659		7,435
Financing Receivable, Allowance for Credit Loss, Writeoff	(146)	0	(146)	(10)
Financing Receivable, Allowance for Credit Loss, Recovery	503	422	554	704
Provision (recapture) for credit losses	524	5,630	(764)	11,345
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	1,186	1,595	1,186	1,595	$ 1,163	$ 1,393	1,644		883
Financing Receivable, Allowance for Credit Loss, Writeoff	(385)	(198)	(512)	(466)
Financing Receivable, Allowance for Credit Loss, Recovery	215	130	276	254
Provision (recapture) for credit losses	$ 193	19	$ 29	146
Unallocated Financing Receivables [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss		0		0			$ 149		$ 612
Financing Receivable, Allowance for Credit Loss, Writeoff		0		0
Financing Receivable, Allowance for Credit Loss, Recovery		0		0
Provision (recapture) for credit losses		$ (149)		$ (9)
Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Change in allowance for credit losses due to adoption of new ASU								$ 1,632
Accounting Standards Update 2016-13 [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Change in allowance for credit losses due to adoption of new ASU								7,533
Accounting Standards Update 2016-13 [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Change in allowance for credit losses due to adoption of new ASU								762
Accounting Standards Update 2016-13 [Member] | Agriculture [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Change in allowance for credit losses due to adoption of new ASU								(9,325)
Accounting Standards Update 2016-13 [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Change in allowance for credit losses due to adoption of new ASU								(1,750)
Accounting Standards Update 2016-13 [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Change in allowance for credit losses due to adoption of new ASU								4,237
Accounting Standards Update 2016-13 [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Change in allowance for credit losses due to adoption of new ASU								778
Accounting Standards Update 2016-13 [Member] | Unallocated Financing Receivables [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Change in allowance for credit losses due to adoption of new ASU								$ (603)

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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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Schedule of Allowance for Unfunded Commitments and Letters of Credit [Line Items]
Allowance For Unfunded Loan Commitments And Letters Of Credit	$ 10,000	$ 8,800	$ 10,000	$ 8,800	$ 9,800	$ 8,300	$ 6,000		$ 3,430
Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance	$ 200	$ 2,800	$ 1,700	$ 3,800
Accounting Standards Update 2016-13 [Member]
Schedule of Allowance for Unfunded Commitments and Letters of Credit [Line Items]
Change in allowance for unfunded commitments and letters of credit due to adoption of new ASU					$ 0		$ 0	$ 0	$ 1,570

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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, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 1,621,922		$ 2,223,383
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,615,362		1,379,336
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,239,041		985,423
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	854,436		875,545
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	785,447		812,034
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,855,933		1,413,553
Financing Receivable, Revolving	1,693,637		1,687,345
Financing Receivable, Revolving Converted to Term Loans	27,338		51,041
Loans and Leases Receivable, Net of Deferred Income	9,693,116		9,427,660
Financing Receivable, Allowance for Credit Loss	142,988	$ 148,294	149,140	$ 151,546	$ 122,074	$ 83,968
Loans, net	9,550,128		9,278,520
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	392,208		680,708
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	662,336		709,562
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	686,516		513,737
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	475,990		547,996
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	508,073		498,904
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,312,274		1,038,233
Financing Receivable, Revolving	58,704		55,443
Financing Receivable, Revolving Converted to Term Loans	4,970		17,730
Loans and Leases Receivable, Net of Deferred Income	4,101,071		4,062,313
Financing Receivable, Allowance for Credit Loss	53,250	57,050	68,934	50,233	37,122	20,340
Commercial Real Estate [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	389,826		674,444
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	648,251		645,328
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	584,280		478,881
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	443,700		502,112
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	452,989		408,972
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,163,730		946,980
Financing Receivable, Revolving	57,550		52,049
Financing Receivable, Revolving Converted to Term Loans	2,775		11,332
Loans and Leases Receivable, Net of Deferred Income	3,743,101		3,720,098
Commercial Real Estate [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,875		3,348
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	10,168		39,374
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	58,636		21,285
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	21,408		30,232
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	26,722		46,197
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	60,889		50,115
Financing Receivable, Revolving	0		5
Financing Receivable, Revolving Converted to Term Loans	2,195		2,139
Loans and Leases Receivable, Net of Deferred Income	181,893		192,695
Commercial Real Estate [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	507		2,916
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	3,917		24,860
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	43,600		13,571
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	10,882		15,652
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	28,362		43,735
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	87,655		41,138
Financing Receivable, Revolving	1,154		3,389
Financing Receivable, Revolving Converted to Term Loans	0		4,259
Loans and Leases Receivable, Net of Deferred Income	176,077		149,520
Commercial Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	881,837		1,094,027
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	593,050		400,172
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	358,688		343,892
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	281,579		229,497
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	190,264		231,713
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	349,329		229,070
Financing Receivable, Revolving	1,065,097		1,055,285
Financing Receivable, Revolving Converted to Term Loans	18,444		14,312
Loans and Leases Receivable, Net of Deferred Income	3,738,288		3,597,968
Financing Receivable, Allowance for Credit Loss	57,554	58,405	45,250	53,186	45,570	30,292
Commercial Business [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	881,501		1,087,400
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	585,999		366,435
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	325,418		324,360
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	245,432		199,010
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	163,134		218,313
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	316,525		214,677
Financing Receivable, Revolving	980,429		1,000,725
Financing Receivable, Revolving Converted to Term Loans	16,876		11,540
Loans and Leases Receivable, Net of Deferred Income	3,515,314		3,422,460
Commercial Business [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		3,002
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,243		26,361
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	8,311		8,471
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	6,293		24,582
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	4,955		7,004
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	990		10,650
Financing Receivable, Revolving	43,386		22,426
Financing Receivable, Revolving Converted to Term Loans	251		0
Loans and Leases Receivable, Net of Deferred Income	65,429		102,496
Commercial Business [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	336		3,625
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	5,808		7,376
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	24,959		11,061
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	29,854		5,905
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	22,175		6,396
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	31,814		3,743
Financing Receivable, Revolving	41,282		32,134
Financing Receivable, Revolving Converted to Term Loans	1,317		2,772
Loans and Leases Receivable, Net of Deferred Income	157,545		73,012
Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	98,017		147,356
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	106,789		103,182
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	93,316		50,587
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	39,034		62,657
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	58,665		59,177
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	105,005		62,898
Financing Receivable, Revolving	294,103		283,000
Financing Receivable, Revolving Converted to Term Loans	2,651		10,770
Loans and Leases Receivable, Net of Deferred Income	797,580		779,627
Financing Receivable, Allowance for Credit Loss	7,920	9,487	9,052	14,868	11,085	15,835
Agriculture [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	97,908		142,163
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	95,853		90,612
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	82,533		44,434
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	37,066		58,366
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	54,739		58,893
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	102,476		59,396
Financing Receivable, Revolving	259,260		244,135
Financing Receivable, Revolving Converted to Term Loans	1,744		9,299
Loans and Leases Receivable, Net of Deferred Income	731,579		707,298
Agriculture [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	109		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	4,593		90
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	738		285
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	325		33
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	64		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0		0
Financing Receivable, Revolving	4,526		85
Financing Receivable, Revolving Converted to Term Loans	0		13
Loans and Leases Receivable, Net of Deferred Income	10,355		506
Agriculture [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		5,193
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	6,343		12,480
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	10,045		5,868
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,643		4,258
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,862		284
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,529		3,502
Financing Receivable, Revolving	30,317		38,780
Financing Receivable, Revolving Converted to Term Loans	907		1,458
Loans and Leases Receivable, Net of Deferred Income	55,646		71,823
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	115,216		134,693
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	101,292		84,706
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	38,091		10,066
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	6,699		3,498
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,448		763
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,951		1,861
Financing Receivable, Revolving	30,302		29,323
Financing Receivable, Revolving Converted to Term Loans	304		3,753
Loans and Leases Receivable, Net of Deferred Income	300,303		268,663
Financing Receivable, Allowance for Credit Loss	6,559	6,551	7,636	7,953	8,845	8,571
Construction [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	115,216		134,693
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	101,292		66,974
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	19,352		10,066
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	6,699		3,498
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,448		763
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,897		1,805
Financing Receivable, Revolving	30,302		29,323
Financing Receivable, Revolving Converted to Term Loans	304		3,753
Loans and Leases Receivable, Net of Deferred Income	281,510		250,875
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		17,732
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	18,739		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		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	54		56
Financing Receivable, Revolving	0		0
Financing Receivable, Revolving Converted to Term Loans	0		0
Loans and Leases Receivable, Net of Deferred Income	18,793		17,788
One-to-Four Family Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	130,355		161,021
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	148,576		78,605
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	60,122		63,255
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	49,345		30,903
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	24,324		21,233
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	83,250		80,261
Financing Receivable, Revolving	227,402		244,330
Financing Receivable, Revolving Converted to Term Loans	777		3,962
Loans and Leases Receivable, Net of Deferred Income	724,151		683,570
Financing Receivable, Allowance for Credit Loss	16,519	15,638	16,875	23,711	17,659	7,435
One-to-Four Family Residential [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	130,355		161,021
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	146,145		77,756
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	58,921		62,696
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	49,106		29,737
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	23,838		20,889
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	81,118		78,098
Financing Receivable, Revolving	227,230		243,325
Financing Receivable, Revolving Converted to Term Loans	622		3,655
Loans and Leases Receivable, Net of Deferred Income	717,335		677,177
One-to-Four Family Residential [Member] | Special Mention [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	2,350		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		332
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	314		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0		195
Financing Receivable, Revolving	0		0
Financing Receivable, Revolving Converted to Term Loans	0		0
Loans and Leases Receivable, Net of Deferred Income	2,664		527
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		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	81		849
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,201		227
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	239		1,166
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	172		344
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,132		1,968
Financing Receivable, Revolving	172		1,005
Financing Receivable, Revolving Converted to Term Loans	155		307
Loans and Leases Receivable, Net of Deferred Income	4,152		5,866
Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	4,289		5,578
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	3,319		3,109
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,308		3,886
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,789		994
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	673		244
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,124		1,230
Financing Receivable, Revolving	18,029		19,964
Financing Receivable, Revolving Converted to Term Loans	192		514
Loans and Leases Receivable, Net of Deferred Income	31,723		35,519
Financing Receivable, Allowance for Credit Loss	1,186	$ 1,163	1,393	$ 1,595	$ 1,644	$ 883
Consumer Loan [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	4,289		5,548
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	3,294		3,109
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,270		3,886
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,789		989
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	671		244
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,122		1,060
Financing Receivable, Revolving	18,006		19,911
Financing Receivable, Revolving Converted to Term Loans	192		474
Loans and Leases Receivable, Net of Deferred Income	31,633		35,221
Consumer Loan [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		30
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	25		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	38		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		5
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2		170
Financing Receivable, Revolving	23		53
Financing Receivable, Revolving Converted to Term Loans	0		40
Loans and Leases Receivable, Net of Deferred Income	$ 90		$ 298

XML

Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit (Narrative) (Details)	3 Months Ended
	Jun. 30, 2021 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)	$ (6,200,000)

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Other Real Estate Owned (Summary of Other Real Estate Owned) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other Real Estate Owned [Line Items]
Balance, beginning of period	$ 521	$ 510	$ 553	$ 552
Real Estate Acquired Through Foreclosure Transfers In Net Of Write Downs	0	558	0	558
Transfer Other Real Estate Write Down	140	0	140	0
Proceeds from Sale of OREO Property	0	303	132	345
Gain on sale of OREO, net	0	(18)	100	(18)
Total OREO, end of period	$ 381	$ 747	$ 381	$ 747

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Other Real Estate Owned (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Other Real Estate Owned [Line Items]
Foreclosed residential real estate properties	$ 381	$ 521	$ 553	$ 747	$ 510	$ 552
Mortgage Loans in Process of Foreclosure, Amount	166
One-to-Four Family Residential [Member]
Other Real Estate Owned [Line Items]
Foreclosed residential real estate properties	$ 0

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Goodwill and Intangible Assets (Schedule of Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets [Roll Forward]
Total goodwill, beginning of period			$ 765,842
Total goodwill, end of period	$ 765,842	$ 765,842	765,842	$ 765,842
CDI current period amortization	(1,852)	(2,210)	(3,776)	(4,520)
Indefinite-lived Intangible Assets (Excluding Goodwill)	919	919	919	919
Other intangible assets, net	22,958	30,938	22,958	30,938		$ 26,734
Total goodwill and intangible assets, end of period	788,800	796,780	788,800	796,780
Core Deposits [Member]
Goodwill and Intangible Assets [Roll Forward]
Gross core deposit intangible balance, beginning of period					$ 105,473	105,473	$ 105,473	$ 105,473
Accumulated amortization at beginning of period					$ (81,582)	$ (79,658)	$ (73,244)	$ (70,934)
Core deposit intangible, net, beginning of period	23,891	32,229	25,815	34,539
CDI current period amortization	(1,852)	(2,210)	(3,776)	(4,520)
Total core deposit intangible, end of period	$ 22,039	$ 30,019	$ 22,039	$ 30,019

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Goodwill and Intangible Assets (Estimated Future Amortization Expense of Core Deposit Intangibles) (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Future Amortization Expense For Core Deposit Intangibles
2021	$ 3,488
2022	5,880
2023	4,552
2024	3,432
2025	$ 2,415

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Intangible Assets, Goodwill and Other (Details) - Narrative	6 Months Ended
	Jun. 30, 2021
Core Deposits [Member]
Goodwill and Intangible Assets [Line Items]
Estimated life of CDI, in years	10 years

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Revolving Line of Credit (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
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

XML

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, 2021	Dec. 31, 2020
Derivative [Line Items]
Fair value of asset derivative instruments	$ 32,546	$ 46,184
Fair value of liability derivative instruments	32,853	46,637
Other Assets [Member] | Interest Rate Lock Commitments Contracts
Derivative [Line Items]
Fair value of asset derivative instruments	585	1,096
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	32,546	46,184
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	23	165
Other Liabilities [Member] | Interest Rate Swap Contracts
Derivative [Line Items]
Fair value of liability derivative instruments	$ 32,853	$ 46,637

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Derivatives and Balance Sheet Offsetting - Cash flow hedge effect on AOCI table (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Balance Sheet Offsetting [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	$ 0	$ 3,402	$ 0	$ 26,825
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	$ 2,602	$ 2,190	$ 5,178	$ 3,130

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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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Balance Sheet Offsetting [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ (907)	$ (473)	$ (296)	$ (473)
Interest Rate Contracts [Member] | Interest Rate Lock Commitments Contracts
Balance Sheet Offsetting [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(340)	0	(511)	0
Interest Rate Contracts [Member] | Interest rate Forward Sales Contracts
Balance Sheet Offsetting [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(527)	0	143	0
Interest Rate Contracts [Member] | Interest Rate Swap Contracts
Balance Sheet Offsetting [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ (40)	$ (473)	$ 72	$ (473)

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Derivatives and Balance Sheet Offsetting - Collateral pledged table (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Balance Sheet Offsetting [Line Items]
Repurchase agreements, amounts offset in balance sheet	$ 0	$ 0
Repurchase agreements, net amount presented in statement of financial position	70,994	73,859
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	(70,994)	(73,859)
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	32,546	46,184
Derivative, Collateral, Obligation to Return Cash	(430)	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	32,116	46,184
Derivative Liability, Gross Amounts Offset in Balance Sheets	0	0
Derivative Liability	32,853	46,637
Derivative, Collateral, Right to Reclaim Cash	30,167	46,637
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	2,686	0
Available-for-sale Securities [Member]
Balance Sheet Offsetting [Line Items]
Securities Sold under Agreements to Repurchase, Gross	70,994	73,859
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Balance Sheet Offsetting [Line Items]
Fair value of asset derivative instruments	32,546	46,184
Fair value of liability derivative instruments	$ 32,853	$ 46,637

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Derivatives and Balance Sheet Offsetting - Collateral pledged for repurchase agreements table (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Balance Sheet Offsetting [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	$ 70,994
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	70,994
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	70,994
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

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Derivatives and Balance Sheet Offsetting (Narative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
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	70,994
Commitments To Originate Loans Held For Sale Member
Balance Sheet Offsetting [Line Items]
Commitments and contingent liabilities (Note 10)	26,900	$ 31,900
Interest rate Forward Sales Contracts
Balance Sheet Offsetting [Line Items]
Commitments and contingent liabilities (Note 10)	21,500	26,500
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Balance Sheet Offsetting [Line Items]
Derivative, Notional Amount	605,100	$ 597,900
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	$ 70,994

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Commitments and contingent liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Commitments to Extend Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 3,040.0	$ 2,800.0
Standby Letters of Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 24.7	$ 29.9

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Shareholders' Equity (Details) - $ / shares	Jul. 29, 2021	Apr. 29, 2021	Jan. 28, 2021
Subsequent Event [Line Items]
Declared quarterly cash dividend		$ 0.28	$ 0.28
Subsequent Event [Member]
Subsequent Event [Line Items]
Declared quarterly cash dividend	$ 0.28

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Accumulated Other Comprehensive Income (Changes in AOCI by Component) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 77,728	$ 137,207	$ 182,195	$ 40,367
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	21,850	45,471	(80,755)	143,144
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax	(2,469)	(1,601)	(4,331)	(2,434)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	19,381	43,870	(85,086)	140,710
Ending balance	97,109	181,077	97,109	181,077
Unrealized Gains and Losses on Available-for-Sale Debt Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	60,569	112,543	163,174	33,038
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	21,850	42,860	(80,755)	122,556
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax	(586)	0	(586)	(191)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	21,264	42,860	(81,341)	122,365
Ending balance	81,833	155,403	81,833	155,403
Unrealized Gains and Losses on Pension Plan Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(5,718)	(3,894)	(5,833)	(3,974)
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	115	79	230	159
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	115	79	230	159
Ending balance	(5,603)	(3,815)	(5,603)	(3,815)
Unrealized gains and losses on cash flow hedge
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	22,877	28,558	24,854	11,303
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	2,611	0	20,588
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax	(1,998)	(1,680)	(3,975)	(2,402)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	(1,998)	931	(3,975)	18,186
Ending balance	$ 20,879	$ 29,489	$ 20,879	$ 29,489

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Accumulated Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains, net			$ 314	$ 16,674
Loan interest income	$ 125,462	$ 121,851	249,456	244,273
Total before tax	69,576	44,777	133,977	62,635
Income tax provision	(14,537)	(8,195)	(27,085)	(11,425)
Net Income	55,039	36,582	106,892	51,210
Compensation and employee benefits	53,450	46,043	105,186	100,885
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]
Investment securities gains, net	314	0	314	249
Total before tax	764	0	764	249
Income tax provision	(178)	0	(178)	(58)
Net Income	586	0	586	191
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	450	0	450	0
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]
Total before tax	(149)	(103)	(299)	(207)
Income tax provision	34	24	69	48
Net Income	(115)	(79)	(230)	(159)
Compensation and employee benefits	(149)	(103)	(299)	(207)
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]
Total before tax	2,602	2,190	5,178	3,130
Income tax provision	(604)	(510)	(1,203)	(728)
Net Income	1,998	1,680	3,975	2,402
Loans	$ 2,602	$ 2,190	$ 5,178	$ 3,130

XML

Fair Value Accounting and Measurement (Financial Assets And Liabilities Accounted for Fair Value On Recurring Basis) (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 4,190,066	$ 5,210,134
Loans held for sale	14,413	14,760
Interest rate derivative asset	32,546	46,184
Interest rate derivative liability	32,853	46,637
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
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, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	4,190,066	5,210,134
Loans held for sale	14,413	14,760
Interest rate derivative asset	32,546	46,184
Interest rate derivative liability	32,853	46,637
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	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, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	2,737,200	3,814,387
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	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, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	2,737,200	3,814,387
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	432,314	357,479
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	432,314	357,479
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	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	764,060	753,572
State and Municipal Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
State and Municipal Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	764,060	753,572
State and Municipal Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
U.S. Government Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	256,492	284,696
U.S. Government Agency [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
U.S. Government Agency [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	256,492	284,696
U.S. Government Agency [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
Interest Rate Lock Commitments Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate derivative asset	585	1,096
Interest Rate Lock Commitments Contracts | Fair Value, Inputs, Level 1 [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, 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, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate derivative asset	585	1,096
Interest rate Forward Sales Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	23	165
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 1 [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, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	23	165
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	$ 0	$ 0

XML

Fair Value Accounting and Measurement (IRL Quantitative Information About Level 3 Fair Value Measurements) (Details) $ in Thousands	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
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	0.7850
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	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	0.8889
Fair Value, Recurring [Member]
Fair Value Measurements Inputs and Valuation Techniques
Interest rate derivative asset	$ 32,546	$ 46,184
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	585	1,096
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	$ 585	$ 1,096

XML

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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Balance - Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 585	$ 0	$ 585	$ 0	$ 925	$ 1,096	$ 0	$ 0
Change included in Earnings - Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	2,134	0	3,844	0
Settlements - Fair Value Net Derivative Asset (Liability) Measured on Recurring Basis with Unobserved Inputs reconciliation, Sales and Settlements	$ (2,474)	$ 0	$ (4,355)	$ 0

XML

Fair Value Accounting and Measurement Equity securities without readily determinable values (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Equity Securities	$ 13,425	$ 13,425	$ 13,425	$ 13,425	$ 13,425	$ 13,425	$ 0	$ 0
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount	$ 0	$ 13,425	$ 0	$ 13,425

XML

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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities	$ 13,425	$ 13,425	$ 13,425	$ 13,425	$ 13,425	$ 13,425	$ 0	$ 0
Fair Value, Option, Changes in Fair Value, Gain (Loss)	(57)	0	(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	7,976	4,331	7,976
Other real estate owned, fair value disclosure	375		375
Equity Securities		13,425		13,425
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	0	0
Other real estate owned, fair value disclosure	0		0
Equity Securities		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	0	0
Other real estate owned, fair value disclosure	0		0
Equity Securities		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	4,331	7,976	4,331	7,976
Other real estate owned, fair value disclosure	375		375
Equity Securities		13,425		13,425
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	(6,946)	383	(7,745)
Equity Securities [Member] | 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)		$ 13,425		$ 13,425
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

XML

Fair Value Accounting and Measurement (Quantitative Information About Level 3 Fair Value Measurements) (Details) - Fair Value, Nonrecurring [Member] $ in Thousands	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)
Fair Value Measurements Inputs and Valuation Techniques
Collateral dependent loans, Fair Value	$ 4,331	$ 7,976
Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements Inputs and Valuation Techniques
Collateral dependent loans, Fair Value	$ 4,331	$ 7,976
Valuation, Market Approach [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements Inputs and Valuation Techniques
Collateral dependent loans, Measurement Input	0.0000	0.0000
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	1.0000
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	0.5622

XML

Fair Value Accounting and Measurement (Carrying Amounts and Estimated Fair Values of Selected Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Assets
Interest-earning deposits with banks	$ 612,883	$ 434,867
Debt securities available for sale at fair value	4,190,066	5,210,134
Debt Securities, Held-to-Maturity, Amortized Cost	2,024,715	0
Debt Securities, Held-to-maturity, Fair Value	2,032,980	0
Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	218,649	218,899
Interest-earning deposits with banks	612,883	434,867
Debt securities available for sale at fair value	4,190,066	5,210,134
Debt Securities, Held-to-maturity, Fair Value	2,032,980
FHLB stock	10,280	10,280
Loans held for sale	13,179	26,481
Loans	9,955,668	9,720,592
Liabilities
Deposits	326,735	338,815
FHLB advances	8,878	9,295
Repurchase agreements	70,994	73,859
Subordinated Debentures	35,171	35,414
Carrying Amount
Assets
Cash and due from banks	218,649	218,899
Interest-earning deposits with banks	612,883	434,867
Debt securities available for sale at fair value	4,190,066	5,210,134
Debt Securities, Held-to-Maturity, Amortized Cost	2,024,715
FHLB stock	10,280	10,280
Loans held for sale	13,179	26,481
Loans	9,550,128	9,278,520
Liabilities
Deposits	327,882	338,845
FHLB advances	7,386	7,414
Repurchase agreements	70,994	73,859
Subordinated Debentures	35,000	35,092
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	218,649	218,899
Interest-earning deposits with banks	612,883	434,867
Debt securities available for sale at fair value	0	0
Debt Securities, Held-to-maturity, Fair Value	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
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	4,190,066	5,210,134
Debt Securities, Held-to-maturity, Fair Value	2,032,980
FHLB stock	10,280	10,280
Loans held for sale	13,179	26,481
Loans	0	0
Liabilities
Deposits	326,735	338,815
FHLB advances	8,878	9,295
Repurchase agreements	70,994	73,859
Subordinated Debentures	35,171	35,414
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
FHLB stock	0	0
Loans held for sale	0	0
Loans	9,955,668	9,720,592
Liabilities
Deposits	0	0
FHLB advances	0	0
Repurchase agreements	0	0
Subordinated Debentures	0	0
Interest Rate Swap Contracts | Estimate of Fair Value Measurement [Member]
Assets
Interest rate derivative asset	32,546	46,184
Liabilities
Interest rate derivative liability	32,853	46,637
Interest Rate Swap Contracts | Carrying Amount
Assets
Interest rate derivative asset	32,546	46,184
Liabilities
Interest rate derivative liability	32,853	46,637
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	32,546	46,184
Liabilities
Interest rate derivative liability	32,853	46,637
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	585	1,096
Interest Rate Lock Commitments Contracts | Carrying Amount
Assets
Interest rate derivative asset	585	1,096
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	585	1,096
Interest rate Forward Sales Contracts | Estimate of Fair Value Measurement [Member]
Liabilities
Interest rate derivative liability	23	165
Interest rate Forward Sales Contracts | Carrying Amount
Liabilities
Interest rate derivative liability	23	165
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	23	165
Interest rate Forward Sales Contracts | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Liabilities
Interest rate derivative liability	$ 0	$ 0

XML

Fair Value Accounting and Measurement (Aggregate FV and aggregate unpaid principal balance of LHFS under FV option (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Fair Value Disclosures [Abstract]
FV, Loans held for sale, FV option, Mandatory Delivery method	$ 14,413	$ 14,760
Fair Value, Loans held for sale, FV option, Aggregate Unpaid Principal Balance	14,050	14,252
Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables	$ 363	$ 508

XML

Fair Value Accounting and Measurement - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Visa Class B shares, remaining shares	77,683		77,683
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ (57)	$ 0	$ (145)

XML

Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 55,039	$ 36,582	$ 106,892	$ 51,210
Earnings allocated to participating securities - nonvested restricted shares	70	139	227	325
Earnings allocated to common shareholders, Basic	$ 54,969	$ 36,443	$ 106,665	$ 50,885
Weighted average common shares outstanding	70,987	70,679	70,924	70,942
Basic earnings per common share	$ 0.77	$ 0.52	$ 1.50	$ 0.72
Earnings allocated to common shareholders, Diluted	$ 54,969	$ 36,443	$ 106,665	$ 50,885
Dilutive effect of equity awards	177	32	155	39
Weighted average diluted common shares outstanding	71,164	70,711	71,079	70,981
Diluted earnings per common share	$ 0.77	$ 0.52	$ 1.50	$ 0.72
Potentially dilutive stock awards and units that were not included in the computation of diluted EPS because to do so would be anti-dilutive.	248	571	158	450

XML

Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue from Contract with Customer [Abstract]
Deposit account and treasury management fees	$ 6,701	$ 6,092	$ 13,059	$ 13,880
Card revenue	4,773	3,079	8,506	6,597
Financial services and trust revenue	4,245	3,163	7,626	6,228
Revenue from contracts with customers	15,719	12,334	29,191	26,705
Noninterest income, excluding revenue from contracts with customers	7,011	24,925	16,705	31,761
Noninterest Income	$ 22,730	$ 37,259	$ 45,896	$ 58,466