TriCo Bancshares (TCBK) 10-Q 8 Nov 21 2021 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Nov. 05, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	000-10661
Entity Incorporation, State or Country Code	CA
Entity Tax Identification Number	94-2792841
Entity Address, Address Line One	63 Constitution Drive
Entity Address, City or Town	Chico
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95973
City Area Code	530
Local Phone Number	898-0300
Title of 12(b) Security	Common Stock
Trading Symbol	TCBK
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		29,714,609
Entity Registrant Name	TriCo Bancshares
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0000356171

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets:
Cash and due from banks	$ 83,188	$ 77,253
Cash at Federal Reserve and other banks	657,048	592,298
Cash and cash equivalents	740,236	669,551
Investment securities:
Marketable equity securities	2,965	3,025
Available for sale debt securities, net of allowance for credit losses of $—	2,095,821	1,414,264
Held to maturity debt securities, net of allowance for credit losses of $—	216,979	284,563
Restricted equity securities	17,250	17,250
Loans held for sale	3,072	6,268
Loans	4,887,496	4,763,127
Allowance for credit losses	(84,306)	(91,847)
Total loans, net	4,803,190	4,671,280
Premises and equipment, net	78,968	83,731
Cash value of life insurance	120,932	118,870
Accrued interest receivable	18,425	20,004
Goodwill	220,872	220,872
Other intangible assets, net	13,562	17,833
Operating leases, right-of-use	26,815	27,846
Other assets	98,943	84,172
Total assets	8,458,030	7,639,529
Deposits:
Noninterest-bearing demand	2,943,016	2,581,517
Interest-bearing	4,293,806	3,924,417
Total deposits	7,236,822	6,505,934
Accrued interest payable	1,056	1,362
Operating lease liability	27,290	27,973
Other liabilities	107,282	94,597
Other borrowings	45,601	26,914
Junior subordinated debt	57,965	57,635
Total liabilities	7,476,016	6,714,415
Commitments and contingencies (Note 7)
Shareholders’ equity:
Preferred stock, no par value: 1,000,000 shares authorized, zero issued and outstanding at September 30, 2021 and December 31, 2020	0	0
Common stock, no par value: 50,000,000 shares authorized; 29,714,609 and 29,727,214 issued and outstanding at September 30, 2021 and December 31, 2020, respectively	531,339	530,835
Retained earnings	446,948	381,999
Accumulated other comprehensive income, net of tax	3,727	12,280
Total shareholders’ equity	982,014	925,114
Total liabilities and shareholders’ equity	$ 8,458,030	$ 7,639,529

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Available-for-sale, allowance for credit loss	$ 0	$ 0
Held-to-maturity, allowance for credit loss	$ 0	$ 0
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	29,714,609	29,727,214
Common stock, shares outstanding (in shares)	29,714,609	29,727,214

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest and dividend income:
Loans, including fees	$ 60,725	$ 58,039	$ 181,465	$ 172,706
Investments:
Taxable securities	7,483	6,153	20,594	21,830
Tax exempt securities	882	848	2,656	2,704
Dividends	258	223	730	807
Interest bearing cash at Federal Reserve and other banks	280	175	578	1,056
Total interest and dividend income	69,628	65,438	206,023	199,103
Interest expense:
Deposits	855	1,412	2,620	5,776
Other borrowings	6	4	15	13
Junior subordinated debt	534	568	1,632	2,009
Total interest expense	1,395	1,984	4,267	7,798
Net interest income	68,233	63,454	201,756	191,305
Provision for (reversal of) credit losses	(1,435)	7,649	(7,755)	37,963
Net interest income after credit loss provision (reversal)	69,668	55,805	209,511	153,342
Non-interest income:
Service charges and fees	11,265	10,469	32,671	27,763
Gain on sale of loans	1,814	3,035	7,908	5,662
Gain on sale of investment securities	0	7	0	7
Asset management and commission income	957	667	2,738	2,244
Increase in cash value of life insurance	644	773	2,062	2,203
Other	415	186	1,783	735
Total non-interest income	15,095	15,137	47,162	38,614
Non-interest expense:
Salaries and related benefits	26,274	29,321	78,685	83,648
Other	19,533	17,393	52,911	53,365
Total non-interest expense	45,807	46,714	131,596	137,013
Income before provision for income taxes	38,956	24,228	125,077	54,943
Provision for income taxes	11,534	6,622	35,644	13,786
Net income	$ 27,422	$ 17,606	$ 89,433	$ 41,157
Per share data:
Basic earnings per share (in USD per share)	$ 0.92	$ 0.59	$ 3.01	$ 1.37
Diluted earnings per share (in USD per share)	0.92	0.59	2.99	1.37
Dividend per share (in USD per share)	$ 0.25	$ 0.22	$ 0.75	$ 0.66

Condensed Consolidated Statem_2

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 27,422	$ 17,606	$ 89,433	$ 41,157
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available for sale securities arising during the period	(4,440)	3,266	(7,924)	7,069
Change in minimum pension liability	0	1,691	0	2,817
Change in joint beneficiary agreements	0	0	(629)	912
Other comprehensive income (loss)	(4,440)	4,957	(8,553)	10,798
Comprehensive income	$ 22,982	$ 22,563	$ 80,880	$ 51,955

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period Of Adoption, Adjusted Balance	Common Stock	Common StockCumulative Effect, Period Of Adoption, Adjusted Balance	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Retained EarningsCumulative Effect, Period Of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss)Cumulative Effect, Period Of Adoption, Adjusted Balance
Beginning balance (in shares) at Dec. 31, 2019				30,523,824	30,523,824
Beginning balance at Dec. 31, 2019	$ 906,570	$ (12,983)	$ 893,587	$ 543,998	$ 543,998	$ 367,794	$ (12,983)	$ 354,811	$ (5,222)	$ (5,222)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	41,157					41,157
Other comprehensive income (loss)	10,798								10,798
Stock options exercised (in shares)				32,000
Stock options exercised	547			$ 547
RSU vesting	1,018			1,018
PSU vesting	458			$ 458
RSUs released (in shares)				31,708
PSUs released (in shares)				20,265
Repurchase of common stock (in shares)				(838,408)
Repurchase of common stock	(25,545)			$ (14,946)		(10,599)
Dividends paid	(19,758)					(19,758)
Ending balance (in shares) at Sep. 30, 2020				29,769,389
Ending balance at Sep. 30, 2020	902,262			$ 531,075		365,611			5,576
Beginning balance (in shares) at Jun. 30, 2020				29,759,209
Beginning balance at Jun. 30, 2020	885,686			$ 530,422		354,645			619
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,606					17,606
Other comprehensive income (loss)	4,957								4,957
Stock options exercised (in shares)				16,000
Stock options exercised	259			$ 259
RSU vesting	383			383
PSU vesting	162			$ 162
RSUs released (in shares)				2,619
PSUs released (in shares)				0
Repurchase of common stock (in shares)				(8,439)
Repurchase of common stock	(242)			$ (151)		(91)
Dividends paid	(6,549)					(6,549)
Ending balance (in shares) at Sep. 30, 2020				29,769,389
Ending balance at Sep. 30, 2020	$ 902,262			$ 531,075		365,611			5,576
Beginning balance (in shares) at Dec. 31, 2020	29,727,214			29,727,214
Beginning balance at Dec. 31, 2020	$ 925,114			$ 530,835		381,999			12,280
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	89,433					89,433
Other comprehensive income (loss)	$ (8,553)								(8,553)
Stock options exercised (in shares)	5,675			5,675
Stock options exercised	$ 86			$ 86
RSU vesting	1,242			1,242
PSU vesting	658			$ 658
RSUs released (in shares)				45,401
PSUs released (in shares)				19,272
Repurchase of common stock (in shares)				(82,953)
Repurchase of common stock	(3,675)			$ (1,482)		(2,193)
Dividends paid	$ (22,291)					(22,291)
Ending balance (in shares) at Sep. 30, 2021	29,714,609			29,714,609
Ending balance at Sep. 30, 2021	$ 982,014			$ 531,339		446,948			3,727
Beginning balance (in shares) at Jun. 30, 2021				29,716,294
Beginning balance at Jun. 30, 2021	966,780			$ 531,038		427,575			8,167
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	27,422					27,422
Other comprehensive income (loss)	(4,440)								(4,440)
Stock options exercised (in shares)				4,000
Stock options exercised	58			$ 58
RSU vesting	485			485
PSU vesting	252			$ 252
RSUs released (in shares)				2,689
PSUs released (in shares)				19,272
Repurchase of common stock (in shares)				(27,646)
Repurchase of common stock	(1,114)			$ (494)		(620)
Dividends paid	$ (7,429)					(7,429)
Ending balance (in shares) at Sep. 30, 2021	29,714,609			29,714,609
Ending balance at Sep. 30, 2021	$ 982,014			$ 531,339		$ 446,948			$ 3,727

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Common Stock
Dividends paid, per share (in USD per share)	$ 0.25	$ 0.22	$ 0.75	$ 0.66

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities:
Net income	$ 89,433	$ 41,157
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	4,923	4,778
Amortization of intangible assets	4,271	4,293
Provision for (reversal of) credit losses on loans	(7,880)	37,738
Amortization of investment securities premium, net	4,702	1,747
Gain on sale of investment securities	0	(7)
Originations of loans for resale	(175,127)	(152,968)
Proceeds from sale of loans originated for resale	184,896	156,347
Gain on sale of loans	(7,908)	(5,662)
Change in market value of mortgage servicing rights	691	2,258
Provision for losses on foreclosed assets	0	0
(Gain) loss on transfer of loans to foreclosed assets	(133)	128
Gain on sale of foreclosed assets	(68)	(57)
Operating lease expense payments	(3,690)	(3,716)
(Gain) loss on disposal of fixed assets	(445)	37
Increase in cash value of life insurance	(2,062)	(2,203)
(Gain) loss on marketable equity securities	59	(72)
Equity compensation vesting expense	1,900	1,476
Change in:
Interest receivable	1,579	(660)
Interest payable	(306)	(836)
Amortization of operating lease ROUA	4,038	4,070
Other assets and liabilities, net	1,046	(9,264)
Net cash from operating activities	99,919	78,584
Investing activities:
Proceeds from maturities of securities available for sale	263,865	114,122
Proceeds from maturities of securities held to maturity	66,880	64,054
Proceeds from sale of available for sale securities	0	229
Purchases of securities available for sale	(960,668)	(298,018)
Loan origination and principal collections, net	(21,869)	(518,564)
Loans purchased	(102,710)	0
Proceeds from sale of other real estate owned	944	570
Proceeds from sale of premises and equipment	2,743	0
Purchases of premises and equipment	(2,114)	(2,340)
Net cash used by investing activities	(752,929)	(639,947)
Financing activities:
Net change in deposits	730,888	973,594
Net change in other borrowings	18,687	8,601
Repurchase of common stock, net of option exercises	(3,675)	(24,999)
Dividends paid	(22,291)	(19,758)
Exercise of stock options	86	0
Net cash from financing activities	723,695	937,438
Net change in cash and cash equivalents	70,685	376,075
Cash and cash equivalents, beginning of period	669,551	276,507
Cash and cash equivalents, end of period	740,236	652,582
Supplemental disclosure of noncash activities:
Unrealized (loss) gain on securities available for sale	(11,249)	10,036
Market value of shares tendered in-lieu of cash to pay for exercise of options and/or related taxes	835	736
Obligations incurred in conjunction with leased assets	2,883	4,161
Loans transferred to foreclosed assets	549	157
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	4,573	8,634
Cash paid for income taxes	$ 38,500	$ 26,000

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Description of Business and Basis of Presentation TriCo Bancshares (the “Company” or “we”) is a California corporation organized to act as a bank holding company for Tri Counties Bank (the “Bank”). The Company and the Bank are headquartered in Chico, California. The Bank is a California-chartered bank that is engaged in the general commercial banking business in 31 California counties. The Company has five capital subsidiary business trusts (collectively, the “Capital Trusts”) that issued trust preferred securities, including two organized by the Company and three acquired with the acquisition of North Valley Bancorp. The consolidated financial statements are prepared in accordance with accounting policies generally accepted in the United States of America and general practices in the banking industry. All adjustments necessary for a fair presentation of these consolidated financial statements have been included and are of a normal and recurring nature. The financial statements include the accounts of the Company. All inter-company accounts and transactions have been eliminated in consolidation. For financial reporting purposes, the Company’s investments in the Capital Trusts of $1,741,000 are accounted for under the equity method and, accordingly, are not consolidated and are included in other assets on the consolidated balance sheet. The subordinated debentures issued and guaranteed by the Company and held by the Capital Trusts are reflected as debt on the Company’s consolidated balance sheet. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (the “2020 Annual Report”). The Company believes that the disclosures made are adequate to make the information not misleading. Segment and Significant Group Concentration of Credit Risk The Company grants agribusiness, commercial, consumer, and residential loans to customers located throughout California. The Company has a diversified loan portfolio within the business segments located in this geographical area. The Company currently classifies all its operation into one business segment that it denotes as community banking. Geographical Descriptions For the purpose of describing the geographical location of the Company’s operations, the Company has defined northern California as that area of California north of, and including, Stockton to the east and San Jose to the west; central California as that area of the state south of Stockton and San Jose, to and including, Bakersfield to the east and San Luis Obispo to the west; and southern California as that area of the state south of Bakersfield and San Luis Obispo. Reclassification Some items in the prior year consolidated financial statements were reclassified to conform to the current presentation. Reclassifications had no effect on prior year net income or shareholders’ equity. Cash and Cash Equivalents Net cash flows are reported for loan and deposit transactions and other borrowings. For purposes of the consolidated statement of cash flows, cash, due from banks with original maturities less than 90 days, interest-earning deposits in other banks, and Federal funds sold are considered to be cash equivalents. Allowance for Credit Losses - Securities The Company measures expected credit losses on held-to-maturity debt securities on a collective basis by major security type, then further disaggregated by sector and bond rating. Accrued interest receivable on held-to-maturity (HTM) debt securities totaled was considered insignificant at September 30, 2021 and is therefore excluded from the estimate of credit losses. The estimate of expected credit losses considers historical credit loss information that is adjusted for current condition and reasonable and supportable forecasts based on current and expected changes in credit ratings and default rates. Based on the implied guarantees of the U. S. Government or its agencies related to certain of these investment securities, and the absence of any historical or expected losses, substantially all qualify for a zero loss assumption. Management has separately evaluated its HTM investment securities from obligations of state and political subdivisions utilizing the historical loss data represented by similar securities over a period of time spanning nearly 50 years. As a result of this evaluation, management determined that the expected credit losses associated with these securities is not significant for financial reporting purposes and therefore, no allowance for credit losses has been recognized. The Company evaluates available for sale debt securities in an unrealized loss position to determine whether the decline in the fair value below the amortized cost basis (impairment) is due to credit-related factors or noncredit-related factors. Any impairment that is not credit related is recognized in other comprehensive income, net of applicable taxes. Credit-related impairment is recognized as an allowance for credit losses on the balance sheet, limited to the amount by which the amortized cost basis exceeds the fair value, with a corresponding adjustment to earnings. Both the allowance for credit losses and the adjustment to net income may be reversed if conditions change. However, if the Company intends to sell an impaired available for sale debt security or more likely than not will be required to sell such a security before recovering its amortized cost basis, the entire impairment amount is recognized in earnings with a corresponding adjustment to the security's amortized cost basis. In evaluating available for sale debt securities in unrealized loss positions for impairment and the criteria regarding its intent or requirement to sell such securities, the Company considers the extent to which fair value is less than amortized cost, whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, and the results of reviews of the issuers' financial condition, among other factors. Changes in the allowance for credit losses are recorded as provision for (or reversal of) credit loss expense. Losses are charged against the ACL when management believes the uncollectability of an available for sale debt security is confirmed or when either of the criteria regarding intent or requirement to sell is met. No security credit losses were recognized during the nine month periods ended September 30, 2021 and 2020, respectively. Loans Loans that management has the intent and ability to hold until maturity or payoff are reported at principle amount outstanding, net of deferred loan fees and costs. Loans are placed in nonaccrual status when reasonable doubt exists as to the full, timely collection of interest or principal, or a loan becomes contractually past due by 90 days or more with respect to interest or principal and is not well secured and in the process of collection. When a loan is placed on nonaccrual status, all interest previously accrued but not collected is reversed against interest income. Income on such loans is then recognized only to the extent that cash is received and where the future collection of principal is considered probable. Interest accruals are resumed on such loans only when they are brought fully current with respect to interest and principal and when, in the judgment of Management, the loan is estimated to be fully collectible as to both principal and interest. Accrued interest receivable is not included in the calculation of the allowance for credit losses. Allowance for Credit Losses - Loans The allowance for credit losses (ACL) is a valuation account that is deducted from the loan's amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the allowance when management believes the recorded loan balance is confirmed as uncollectible. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Regardless of the determination that a charge-off is appropriate for financial accounting purposes, the Company manages its loan portfolio by continually monitoring, where possible, a borrower's ability to pay through the collection of financial information, delinquency status, borrower discussion and the encouragement to repay in accordance with the original contract or modified terms, if appropriate. Management estimates the allowance balance using relevant information, from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist. Historical credit loss experience provides the basis for the estimation of expected credit losses, which captures loan balances as of a point in time to form a cohort, then tracks the respective losses generated by that cohort of loans over the remaining life. The Company identified and accumulated loan cohort historical loss data beginning with the fourth quarter of 2008 and through the current period. In situations where the Company's actual loss history was not statistically relevant, the loss history of peers, defined as financial institutions with assets greater than three billion and less than ten billion, were utilized to create a minimum loss rate. Adjustments to historical loss information are made for differences in relevant current loan-specific risk characteristics, such as historical timing of losses relative to the loan origination. In its loss forecasting framework, the Company incorporates forward-looking information through the use of macroeconomic scenarios applied over the forecasted life of the assets. These macroeconomic scenarios incorporate variables that have historically been key drivers of increases and decreases in credit losses. These variables include, but are not limited to changes in environmental conditions, such as California unemployment rates, household debt levels and U.S. gross domestic product. A loan is considered to be collateral dependent when repayment is expected to be provided substantially through the operation or sale of the collateral. The ACL on collateral dependent loans is measured using the fair value of the underlying collateral, adjusted for costs to sell when applicable, less the amortized cost basis of the financial asset. If the value of underlying collateral is determined to be less than the recorded amount of the loan, a charge-off will be taken. Loans for which the terms have been modified resulting in a concession, and for which the borrower is experiencing financial difficulties, is considered to be a troubled debt restructuring (TDR). The ACL on a TDR is measured using the same method as all other portfolio loans, except when the value of a concession cannot be measured using a method other than the discounted cash flow method. When the value of a concession is measured using the discounted cash flow method, the ACL is determined by discounting the expected future cash flows at the original interest rate of the loan. The Company has identified the following portfolio segments to evaluate and measure the allowance for credit loss: Commercial real estate : Commercial real estate - Non-owner occupied: These commercial properties typically consist of buildings which are leased to others for their use and rely on rents as the primary source of repayment. Property types are predominantly office, retail, or light industrial but the portfolio also has some special use properties. As such, the risk of loss associated with these properties is primarily driven by general economic changes or changes in regional economies and the impact of such on a tenant’s ability to pay. Ultimately this can affect occupancy, rental rates, or both. Additional risk of loss can come from new construction resulting in oversupply, the costs to hold or operate the property, or changes in interest rates. The terms on these loans at origination typically have maturities from five fifteen Commercial real estate - Owner occupied: These credits are primarily susceptible to changes in the financial condition of the business operated by the property owner. This may be driven by changes in, among other things, industry challenges, factors unique to the operating geography of the borrower, change in the individual fortunes of the business owner, general economic conditions and changes in business cycles. When default is driven by issues related specifically to the business owner, collateral values tend to provide better repayment support and may result in little or no loss. Alternatively, when default is driven more by general economic conditions, the underlying collateral may have devalued more and thus result in larger losses in the event of default. The terms on these loans at origination typically have maturities from five fifteen Multifamily: These commercial properties are generally comprised of more than four rentable units, such as apartment buildings, with each unit intended to be occupied as the primary residence for one or more persons. Multifamily properties are also subject to changes in general or regional economic conditions, such as unemployment, ultimately resulting in increased vacancy rates or reduced rents or both. In addition, new construction can create an oversupply condition and market competition resulting in increased vacancy, reduced market rents, or both. Due to the nature of their use and the greater likelihood of tenant turnover, the management of these properties is more intensive and therefore is more critical to the preclusion of loss. Farmland: While the Company has few loans that were originated for the purpose of the acquisition of these commercial properties, loans secured by farmland represent unique risks that are associated with the operation of an agricultural businesses. The valuation of farmland can vary greatly over time based on the property's access to resources including but not limited to water, crop prices, foreign exchange rates, government regulation or restrictions, and the nature of ongoing capital investment needed to maintain the quality of the property. Loans secured by farmland typically represent less risk to the Company than other agriculture loans as the real estate typically provides greater support in the event of default or need for longer term repayment. Consumer loans : SFR 1-4 1st DT Liens: The most significant drivers of potential loss within the Company's residential real estate portfolio relate general, regional, or individual changes in economic conditions and their effect on employment and borrowers cash flow. Risk in this portfolio is best measured by changes in borrower credit score and loan-to-value. Loss estimates are based on the general movement in credit score, economic outlook and its effects on employment and the value of homes and the Bank’s historical loss experience adjusted to reflect the economic outlook and the unemployment rate. SFR HELOCs and Junior Liens: Similar to residential real estate term loans, HELOCs and junior liens performance is also primarily driven by borrower cash flows based on employment status. However, HELOCs carry additional risks associated with the fact that most of these loans are secured by a deed of trust in a position that is junior to the primary lien holder. Furthermore, the risk that as the borrower's financial strength deteriorates, the outstanding balance on these credit lines may increase as they may only be canceled by the Company if certain limited criteria are met. In addition to the allowance for credit losses maintained as a percent of the outstanding loan balance, the Company maintains additional reserves for the unfunded portion of the HELOC. Other: The majority of consumer loans are secured by automobiles, with the remainder primarily unsecured revolving debt (credit cards). These loans are susceptible to three primary risks; non-payment due to income loss, over-extension of credit and, when the borrower is unable to pay, shortfall in collateral value, if any. Typically non-payment is due to loss of job and will follow general economic trends in the marketplace driven primarily by rises in the unemployment rate. Loss of collateral value can be due to market demand shifts, damage to collateral itself or a combination of those factors. Credit card loans are unsecured and while collection efforts are pursued in the event of default, there is typically limited opportunity for recovery. Loss estimates are based on the general movement in credit score, economic outlook and its effects on employment and the Bank’s historical loss experience adjusted to reflect the economic outlook and the unemployment rate. Commercial and Industrial: Repayment of these loans is primarily based on the cash flow of the borrower, and secondarily on the underlying collateral provided by the borrower. A borrower's cash flow may be unpredictable, and collateral securing these loans may fluctuate in value. Most often, collateral includes accounts receivable, inventory, or equipment. Collateral securing these loans may depreciate over time, may be difficult to appraise, may be illiquid and may fluctuate in value based on the success of the business. Actual and forecast changes in gross domestic product are believed to be corollary to losses associated with these credits. Construction : While secured by real estate, construction loans represent a greater level of risk than term real estate loans due to the nature of the additional risks associated with the not only the completion of construction within an estimated time period and budget, but also the need to either sell the building or reach a level of stabilized occupancy sufficient to generate the cash flows necessary to support debt service and operating costs. The Company seeks to mitigate the additional risks associated with construction lending by requiring borrowers to comply with lower loan to value ratios and additional covenants as well as strong tertiary support of guarantors. The loss forecasting model applies the historical rate of loss for similar loans over the expected life of the asset as adjusted for macroeconomic factors. Agriculture Production: Repayment of agricultural loans is dependent upon successful operation of the agricultural business, which is greatly impacted by factors outside the control of the borrower. These factors include adverse weather conditions, including access to water, that may impact crop yields, loss of livestock due to disease or other factors, declines in market prices for agriculture products, changes in foreign exchange, and the impact of government regulations. In addition, many farms are dependent on a limited number of key individuals whose injury or death may significantly affect the successful operation of the business. Consequently, agricultural production loans may involve a greater degree of risk than other types of loans. Leases: The loss forecasting model applies the historical rate of loss for similar loans over the expected life of the asset. Leases typically represent an elevated level of credit risk as compared to loans secured by real estate as the collateral for leases is often subject to a more rapid rate of depreciation or depletion. The ultimate severity of loss is impacted by the type of collateral securing the exposure, the size of the exposure, the borrower’s industry sector, any guarantors and the geographic market. Assumptions of expected loss are conditioned to the economic outlook and the other variables discussed above. Unfunded commitments : The estimated credit losses associated with these unfunded lending commitments is calculated using the same models and methodologies noted above and incorporate utilization assumptions at time of default. The reserve for unfunded commitments is maintained on the consolidated balance sheet in other liabilities. Accounting Standards Adopted in 2021 On January 1, 2021, the Company adopted ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. This ASU simplified the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The guidance also promoted consistent application and simplification of GAAP for other areas of Topic 740 by clarifying and amending existing guidance. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) was enacted in response to the Coronavirus Disease 2019 (COVID-19) pandemic. The CARES Act provides optional temporary relief from troubled debt restructuring and impairment accounting requirements for loan modifications related to the COVID-19 pandemic made during the period from March 1, 2020 to the earlier of December 31, 2020 or 60 days after the national emergency concerning COVID-19 declared by the President terminates. The applicable period for this relief was extended through 2021 by way of the Consolidated Appropriations Act. Following the passage of the CARES Act legislation, the "Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus" was issued by federal bank regulators, which similarly offers temporary relief from troubled debt restructuring accounting for loan payment deferrals for certain customers whose businesses are experiencing economic hardship due to Coronavirus. The Interagency Statement requires the modification event to be short-term and COVID-19 related, requiring the borrower be not more than 30 days past due as of the date the modification program was implemented, and allowing Management to apply judgement as when the modification program terminates. The ability to suspend TDR accounting under either program does not apply to any adverse impact on the credit of a borrower that is not related to the COVID-19 pandemic. Accounting Standards Pending Adoption FASB issued ASU 2021-06, Presentation of Financial Statements (Topic 205), Financial Services—Depository and Lending (Topic 942), and Financial Services—Investment Companies (Topic 946): Amendments to SEC Paragraphs Pursuant to SEC Final Rule Releases No. 33-10786, Amendments to Financial Disclosures about Acquired and Disposed Businesses, and No. 33-10835, Update of Statistical Disclosures for Bank and Savings and Loan Registrants. This ASU updates certain GAAP annual and interim disclosure requirements to conform with SEC disclosure updates to Guide 3 "Statistical Disclosure by Bank Holding Companies.” Amendments in this ASU are effective for the Company's annual disclosures for fiscal years ending December 31, 2021. The Company's existing annual disclosure report (10-K) largely complies with the impacted updates to Guide 3 requirements, and management expects the impact from adoption to be limited to: certain deposit related disclosures, and reducing certain comparative disclosures from five years to three years, all within Management's Discussion and Analysis section of the 10-K. FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This ASU provides temporary optional guidance to ease the potential burden in accounting for reference rate reform by providing optional expedients and exceptions for applying generally accepted accounting principles (GAAP) to contracts, hedging relationships, and other transactions affected if certain criteria are met. The amendments in this Update apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The election to apply the optional relief for existing fair value and cash flow hedge accounting relationships may be made on a hedge-by-hedge basis and across multiple reporting periods. Amendments in this ASU are effective for the Company through December 31, 2022. As the Company has an insignificant number of instruments that are applicable to this ASU, management has determined that no impact to the valuations of these instruments are applicable for financial reporting purposes.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The amortized cost, estimated fair values and allowance for credit losses of investments in debt securities are summarized in the following tables: September 30, 2021 (in thousands) Amortized Gross Gross Allowance for Credit Losses Estimated Debt Securities Available for Sale Obligations of U.S. government agencies $ 1,241,676 $ 11,001 $ (8,061) $ — $ 1,244,616 Obligations of states and political subdivisions 164,043 5,360 (1,296) — 168,107 Corporate bonds 6,738 58 — — 6,796 Asset backed securities 675,430 3,119 (2,247) — 676,302 Total debt securities available for sale $ 2,087,887 $ 19,538 $ (11,604) $ — $ 2,095,821 Debt Securities Held to Maturity Obligations of U.S. government agencies $ 208,127 $ 10,910 $ — $ — $ 219,037 Obligations of states and political subdivisions 8,852 285 — — 9,137 Total debt securities held to maturity $ 216,979 $ 11,195 $ — $ — $ 228,174 December 31, 2020 (in thousands) Amortized Gross Gross Allowance for Credit Losses Estimated Debt Securities Available for Sale Obligations of U.S. government agencies $ 795,555 $ 17,710 $ (891) $ — $ 812,374 Obligations of states and political subdivisions 123,347 5,748 — — 129,095 Corporate bonds 2,459 85 — — 2,544 Asset backed securities 473,720 1,682 (5,151) — 470,251 Total debt securities available for sale $ 1,395,081 $ 25,225 $ (6,042) $ — $ 1,414,264 Debt Securities Held to Maturity Obligations of U.S. government agencies 273,667 13,774 — $ — 287,441 Obligations of states and political subdivisions 10,896 389 — — 11,285 Total debt securities held to maturity $ 284,563 $ 14,163 $ — $ — $ 298,726 There were no sales of investment securities during the three and nine months ended September 30, 2021 and 2020, respectively. Investment securities with an aggregate carrying value of $440,177,000 and $429,049,000 at September 30, 2021 and December 31, 2020, respectively, were pledged as collateral for specific borrowings, lines of credit or local agency deposits. The amortized cost and estimated fair value of debt securities at September 30, 2021 by contractual maturity are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. At September 30, 2021, obligations of U.S. government corporations and agencies with a cost basis totaling $1,196,924,000 consist almost entirely of residential real estate mortgage-backed securities whose contractual maturity, or principal repayment, will follow the repayment of the underlying mortgages. For purposes of the following table, the entire outstanding balance of these mortgage-backed securities issued by U.S. government corporations and agencies is categorized based on final maturity date. At September 30, 2021, the Company estimates the average remaining life of these mortgage-backed securities issued by U.S. government corporations and agencies to be approximately 4.24 years. Average remaining life is defined as the time span after which the principal balance has been reduced by half. As of September 30, 2021, the contractual final maturity for available for sale and held to maturity investment securities is as follows: Debt Securities Available for Sale Held to Maturity (in thousands) Amortized Estimated Amortized Estimated Due in one year $ 8,771 $ 8,872 $ — $ — Due after one year through five years 154,411 154,531 1,020 1,129 Due after five years through ten years 337,783 339,617 22,548 23,346 Due after ten years 1,586,922 1,592,801 193,411 203,699 Totals $ 2,087,887 $ 2,095,821 $ 216,979 $ 228,174 Gross unrealized losses on debt securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, were as follows: September 30, 2021: Less than 12 months 12 months or more Total (in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Debt Securities Available for Sale Obligations of U.S. government agencies $ 778,650 $ (7,907) $ 11,463 $ (154) $ 790,113 $ (8,061) Obligations of states and political subdivisions 62,820 (1,296) — — 62,820 (1,296) Asset backed securities 232,417 (1,325) 129,656 (922) 362,073 (2,247) Total debt securities available for sale $ 1,073,887 $ (10,528) $ 141,119 $ (1,076) $ 1,215,006 $ (11,604) December 31, 2020: Less than 12 months 12 months or more Total (in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Debt Securities Available for Sale Obligations of U.S. government agencies $ 160,543 $ (891) $ — $ — $ 160,543 $ (891) Asset backed securities 51,544 (441) 297,020 (4,710) 348,564 (5,151) Total debt securities available for sale $ 212,087 $ (1,332) $ 297,020 $ (4,710) $ 509,107 $ (6,042) Obligations of U.S. government agencies: The unrealized losses on investments in obligations of U.S. government agencies are caused by interest rate increases and illiquidity. The contractual cash flows of these securities are guaranteed by U.S. Government Sponsored Entities (principally Fannie Mae and Freddie Mac). It is expected that the securities would not be settled at a price less than the amortized cost of the investment. Because management believes the decline in fair value is attributable to changes in interest rates and not credit quality, and because the Company does not intend to sell and more likely than not will not be required to sell, there is no impairment on these securities and there has been no allowance for credit losses recorded. At September 30, 2021, 40 debt securities representing obligations of U.S. government agencies had unrealized losses with aggregate depreciation of 1.01% from the Company’s amortized cost basis. Obligations of states and political subdivisions: The unrealized losses on investments in obligations of states and political subdivisions were caused by increases in required yields by investors in these types of securities. It is expected that the securities would not be settled at a price less than the amortized cost of the investment. Because management believes the decline in fair value is attributable to changes in interest rates and not credit quality, and because the Company does not intend to sell and more likely than not will not be required to sell, there is no impairment on these securities and there has been no allowance for credit losses recorded as of September 30, 2021. At September 30, 2021, 31 debt securities representing obligations of states and political subdivisions had unrealized losses with aggregate depreciation of 2.02% from the Company’s amortized cost basis. Asset backed securities: The unrealized losses on investments in asset backed securities were caused by increases in required yields by investors for these types of securities. At the time of purchase, each of these securities was rated AA or AAA and through September 30, 2021 has not experienced any deterioration in credit rating. At September 30, 2021, 26 asset backed securities had unrealized losses with aggregate depreciation of 0.62% from the Company’s amortized cost basis. The Company continues to monitor these securities for changes in credit rating or other indications of credit deterioration. Because management believes the decline in fair value is attributable to changes in interest rates and not credit quality, and because the Company does not intend to sell and more likely than not will not be required to sell, there is no impairment on these securities and there has been no allowance for credit losses recorded as of September 30, 2021. The Company monitors credit quality of debt securities held-to-maturity through the use of credit rating. The Company monitors the credit rating on a monthly basis. The following table summarizes the amortized cost of debt securities held-to-maturity at the dates indicated, aggregated by credit quality indicator: September 30, 2021 December 31, 2020 AAA/AA/A BBB/BB/B AAA/AA/A BBB/BB/B (In thousands) (In thousands) Debt Securities Held to Maturity Obligations of U.S. government agencies $ 208,127 $ — $ 273,667 $ — Obligations of states and political subdivisions 8,852 — 10,896 — Total debt securities held to maturity $ 216,979 $ — $ 284,563 $ —

Loans

Loans	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Loans	Loans A summary of loan balances follows: (in thousands) September 30, 2021 December 31, 2020 Commercial real estate: CRE non-owner occupied $ 1,526,030 $ 1,535,555 CRE owner occupied 701,041 624,375 Multifamily 829,644 639,480 Farmland 166,022 152,492 Total commercial real estate loans 3,222,737 2,951,902 Consumer: SFR 1-4 1st DT liens 662,343 546,592 SFR HELOCs and junior liens 323,258 327,484 Other 68,052 78,032 Total consumer loans 1,053,653 952,108 Commercial and industrial 345,027 526,327 Construction 216,680 284,842 Agriculture production 44,410 44,164 Leases 4,989 3,784 Total loans, net of deferred loan fees and discounts $ 4,887,496 $ 4,763,127 Total principal balance of loans owed, net of charge-offs $ 4,928,842 $ 4,805,596 Unamortized net deferred loan fees (17,218) (16,984) Discounts to principal balance of loans owed, net of charge-offs (17,984) (25,485) Total loans, net of unamortized deferred loan fees and discounts $ 4,893,640 $ 4,763,127 Allowance for credit losses on loans $ (84,306) $ (91,847) As of September 30, 2021 and December 31, 2020, the total gross balance outstanding of PPP loans was $157,461,000 and $326,770,000, respectively, as compared to total PPP originations of $640,410,000. In connection with the origination of these loans, the Company earned approximately $25,299,000 in loan fees, offset by deferred loan costs of approximately $1,245,000, the net of which will be recognized over the earlier of loan maturity (between 24-60 months), repayment or receipt of forgiveness confirmation. As of September 30, 2021, there was approximately $6,013,000 in net deferred fee income remaining to be recognized. During the three and nine months ended September 30, 2021, the Company recognized $2,984,000 and $10,306,000, respectively in fees on PPP loans as compared with $2,603,000 and $4,959,000 for the three and nine months ended September 30, 2020, respectively.

Allowance for Credit Losses

Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2021
Allowance For Loan And Lease Losses [Abstract]
Allowance for Credit Losses	Allowance for Credit Losses For the periods indicated, the following tables summarize the activity in the allowance for credit losses on loans which is recorded as a contra asset, and the reserve for unfunded commitments which is recorded on the balance sheet within other liabilities: Allowance for credit losses – Three months ended September 30, 2021 (in thousands) Beginning Charge-offs Recoveries Provision (benefit) Ending Commercial real estate: CRE non-owner occupied $ 26,028 $ — $ 10 $ (817) $ 25,221 CRE owner occupied 10,463 (18) 793 (508) 10,730 Multifamily 13,196 — — (320) 12,876 Farmland 1,950 (126) — 78 1,902 Total commercial real estate loans 51,637 (144) 803 (1,567) 50,729 Consumer: SFR 1-4 1st DT liens 10,629 (145) 1 133 10,618 SFR HELOCs and junior liens 10,701 — 63 (333) 10,431 Other 2,620 (181) 97 (94) 2,442 Total consumer loans 23,950 (326) 161 (294) 23,491 Commercial and industrial 4,511 (1,112) 355 (327) 3,427 Construction 4,951 — — 577 5,528 Agriculture production 1,007 — 2 110 1,119 Leases 6 — — 6 12 Allowance for credit losses on loans 86,062 (1,582) 1,321 (1,495) 84,306 Reserve for unfunded commitments 3,465 — — 60 3,525 Total $ 89,527 $ (1,582) $ 1,321 $ (1,435) $ 87,831 Allowance for credit losses – Nine months ended September 30, 2021 (in thousands) Beginning Charge-offs Recoveries Provision (benefit) Ending Commercial real estate: CRE non-owner occupied $ 29,380 $ — $ 12 $ (4,171) $ 25,221 CRE owner occupied 10,861 (18) 794 (907) 10,730 Multifamily 11,472 — — 1,404 12,876 Farmland 1,980 (126) — 48 1,902 Total commercial real estate loans 53,693 (144) 806 (3,626) 50,729 Consumer: SFR 1-4 1st DT liens 10,117 (145) 12 634 10,618 SFR HELOCs and junior liens 11,771 — 860 (2,200) 10,431 Other 3,260 (460) 262 (620) 2,442 Total consumer loans 25,148 (605) 1,134 (2,186) 23,491 Commercial and industrial 4,252 (1,446) 570 51 3,427 Construction 7,540 — — (2,012) 5,528 Agriculture production 1,209 — 24 (114) 1,119 Leases 5 — — 7 12 Allowance for credit losses on loans 91,847 (2,195) 2,534 (7,880) 84,306 Reserve for unfunded commitments 3,400 — — 125 3,525 Total $ 95,247 $ (2,195) $ 2,534 $ (7,755) $ 87,831 In determining the allowance for credit losses, accruing loans with similar risk characteristics are generally evaluated collectively. To estimate expected losses the Company generally utilizes historical loss trends and the remaining contractual lives of the loan portfolios to determine estimated credit losses through a reasonable and supportable forecast period. Individual loan credit quality indicators including loan grade and borrower repayment performance have been statistically correlated with historical credit losses and various econometrics, including California unemployment, gross domestic product, and corporate bond yields. Model forecasts may be adjusted for inherent limitations or biases that have been identified through independent validation and back-testing of model performance to actual realized results. The Company utilizes a forecast period of approximately eight quarters and obtains the forecast data from publicly available sources as of the balance sheet date. This forecast data continues to evolve and included improving shifts in the magnitude of changes for both the unemployment and GDP factors leading up to the balance sheet date. However, management notes that the majority of economic forecasts utilized in the ACL calculation have remained directionally consistent with preceding quarters, as general economic conditions continue to improve, albeit at a pace slower than expected due to unforeseen disruptions in the supply chain and increasing energy prices. In addition, management notes that the level of governmental assistance provided through PPP as well as other programs during the last several quarters has been unprecedented. As a result, management continues to believe that certain credit weakness are likely present in the overall economy and that it is appropriate to maintain a reserve level that incorporates such risk factors. Allowance for credit losses – Year ended December 31, 2020 (in thousands) Beginning Adoption of CECL Charge-offs Recoveries Provision Ending Balance Commercial real estate: CRE non-owner occupied $ 5,948 $ 6,701 $ — $ 198 $ 16,533 $ 29,380 CRE owner occupied 2,027 2,281 — 28 6,525 10,861 Multifamily 3,352 2,281 — — 5,839 11,472 Farmland 668 585 (182) — 909 1,980 Total commercial real estate loans 11,995 11,848 (182) 226 29,806 53,693 Consumer: SFR 1-4 1st DT liens 2,306 2,675 (13) 416 4,733 10,117 SFR HELOCs and junior liens 6,183 4,638 (116) 304 762 11,771 Other 1,595 971 (670) 347 1,017 3,260 Total consumer loans 10,084 8,284 (799) 1,067 6,512 25,148 Commercial and industrial 4,867 (1,961) (774) 568 1,552 4,252 Construction 3,388 933 — — 3,219 7,540 Agriculture production 261 (179) — 24 1,103 1,209 Leases 21 (12) — — (4) 5 Allowance for credit losses on loans 30,616 18,913 (1,755) 1,885 42,188 91,847 Reserve for unfunded commitments 2,775 — — — 625 3,400 Total $ 33,391 $ 18,913 $ (1,755) $ 1,885 $ 42,813 $ 95,247 On January 1, 2020, the Company adopted ASU 2016-03 Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , which replaces the incurred loss methodology that is referred to as the current expected credit loss (CECL) methodology. The Company recognized an increase in the ACL for loans totaling $18,913,000, including a reclassification of $481,000 from discounts on acquired loans to the allowance for credit losses, as a cumulative effect adjustment from change in accounting policies, with a corresponding decrease in retained earnings, net of $5,449,000 in taxes of $12,983,000. Allowance for credit losses – Three months ended September 30, 2020 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Commercial real estate: CRE non-owner occupied $ 26,091 $ — $ 23 $ 2,733 $ 28,847 CRE owner occupied 8,710 — 1 914 9,625 Multifamily 8,581 — — 1,451 10,032 Farmland 1,468 — — 322 1,790 Total commercial real estate loans 44,850 — 24 5,420 50,294 Consumer: SFR 1-4 1st DT liens 8,015 (2) 2 922 8,937 SFR HELOCs and junior liens 12,108 — 126 (558) 11,676 Other 3,042 (98) 85 365 3,394 Total consumer loans 23,165 (100) 213 729 24,007 Commercial and industrial 4,018 (94) 142 468 4,534 Construction 6,775 — — 865 7,640 Agriculture production 919 — 2 172 1,093 Leases 12 — — (5) 7 Allowance for credit losses on loans $ 79,739 $ (194) $ 381 $ 7,649 $ 87,575 Reserve for unfunded commitments 3,000 — — — 3,000 Total $ 82,739 $ (194) $ 381 $ 7,649 $ 90,575 Allowance for credit losses – Nine months ended September 30, 2020 (in thousands) Beginning Adoption of CECL Charge-offs Recoveries Provision Ending Balance Commercial real estate: CRE non-owner occupied $ 5,948 $ 6,701 $ — $ 223 $ 15,975 $ 28,847 CRE owner occupied 2,027 2,281 — 3 5,314 9,625 Multifamily 3,352 2,281 — — 4,399 10,032 Farmland 668 585 — — 537 1,790 Total commercial real estate loans 11,995 11,848 — 226 26,225 50,294 Consumer: SFR 1-4 1st DT liens 2,306 2,675 (13) 414 3,555 8,937 SFR HELOCs and junior liens 6,183 4,638 (23) 265 613 11,676 Other 1,595 971 (471) 253 1,046 3,394 Total consumer loans 10,084 8,284 (507) 932 5,214 24,007 Commercial and industrial 4,867 (1,961) (688) 323 1,993 4,534 Construction 3,388 933 — — 3,319 7,640 Agriculture production 261 (179) — 22 989 1,093 Leases 21 (12) — — (2) 7 Allowance for credit losses on loans 30,616 18,913 (1,195) 1,503 37,738 87,575 Reserve for unfunded commitments 2,775 — — — 225 3,000 Total $ 33,391 $ 18,913 $ (1,195) $ 1,503 $ 37,963 $ 90,575 As part of the on-going monitoring of the credit quality of the Company’s loan portfolio, management tracks certain credit quality indicators including, but not limited to, trends relating to (i) the level of criticized and classified loans, (ii) net charge-offs, (iii) non-performing loans, and (iv) delinquency within the portfolio. The Company analyzes loans individually to classify the loans as to credit risk and grading. This analysis is performed annually for all outstanding balances greater than $1,000,000 and non-homogeneous loans, such as commercial real estate loans, unless other indicators, such as delinquency, trigger more frequent evaluation. Loans below the $1,000,000 threshold and homogenous in nature are evaluated as needed for proper grading based on delinquency and borrower credit scores. The Company utilizes a risk grading system to assign a risk grade to each of its loans. Loans are graded on a scale ranging from Pass to Loss. A description of the general characteristics of the risk grades is as follows: • Pass – This grade represents loans ranging from acceptable to very little or no credit risk. These loans typically meet most if not all policy standards in regard to: loan amount as a percentage of collateral value, debt service coverage, profitability, leverage, and working capital. • Special Mention – This grade represents “Other Assets Especially Mentioned” in accordance with regulatory guidelines and includes loans that display some potential weaknesses which, if left unaddressed, may result in deterioration of the repayment prospects for the asset or may inadequately protect the Company’s position in the future. These loans warrant more than normal supervision and attention. • Substandard – This grade represents “Substandard” loans in accordance with regulatory guidelines. Loans within this rating typically exhibit weaknesses that are well defined to the point that repayment is jeopardized. Loss potential is, however, not necessarily evident. The underlying collateral supporting the credit appears to have sufficient value to protect the Company from loss of principal and accrued interest, or the loan has been written down to the point where this is true. There is a definite need for a well-defined workout/rehabilitation program. • Doubtful – This grade represents “Doubtful” loans in accordance with regulatory guidelines. An asset classified as Doubtful has all the weaknesses inherent in a loan classified Substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. Pending factors include proposed merger, acquisition, or liquidation procedures, capital injection, perfecting liens on additional collateral, and financing plans. • Loss – This grade represents “Loss” loans in accordance with regulatory guidelines. A loan classified as Loss is considered uncollectible and of such little value that its continuance as a bankable asset is not warranted. This classification does not mean that the loan has absolutely no recovery or salvage value, but rather that it is not practical or desirable to defer writing off the loan, even though some recovery may be affected in the future. The portion of the loan that is graded loss should be charged off no later than the end of the quarter in which the loss is identified. Based on the most recent analysis performed, the risk category of loans by class of loans is as follows for the period indicated: Term Loans Amortized Cost Basis by Origination Year – As of September 30, 2021 (in thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Commercial real estate: CRE non-owner occupied risk ratings Pass $ 150,987 $ 121,346 $ 199,462 $ 136,871 $ 235,302 $ 552,648 $ 69,077 $ — $ 1,465,693 Special Mention — — 8,422 11,555 4,312 19,770 1,730 — 45,789 Substandard — — — 1,397 564 12,587 — — 14,548 Doubtful/Loss — — — — — — — — — Total CRE non-owner occupied risk ratings $ 150,987 $ 121,346 $ 207,884 $ 149,823 $ 240,178 $ 585,005 $ 70,807 $ — $ 1,526,030 Commercial real estate: CRE owner occupied risk ratings Pass $ 137,277 $ 99,090 $ 66,978 $ 53,684 $ 58,367 $ 232,613 $ 22,114 $ — $ 670,123 Special Mention 16,055 — — 289 759 6,446 — — 23,549 Substandard — — 875 1,243 460 4,791 — — 7,369 Doubtful/Loss — — — — — — — — — Total CRE owner occupied risk ratings $ 153,332 $ 99,090 $ 67,853 $ 55,216 $ 59,586 $ 243,850 $ 22,114 $ — $ 701,041 Commercial real estate: Multifamily risk ratings Pass $ 197,898 $ 105,210 $ 106,446 $ 110,324 $ 88,440 $ 152,383 $ 22,648 $ — $ 783,349 Special Mention — 9,388 — — — 24,664 7,684 — 41,736 Substandard — — 4,397 — — 162 — — 4,559 Doubtful/Loss — — — — — — — — — Total multifamily loans $ 197,898 $ 114,598 $ 110,843 $ 110,324 $ 88,440 $ 177,209 $ 30,332 $ — $ 829,644 Commercial real estate: Farmland risk ratings Pass $ 26,989 $ 18,422 $ 20,922 $ 17,650 $ 7,596 $ 19,726 $ 42,725 $ — $ 154,030 Special Mention — — — — 1,197 2,683 1,558 — 5,438 Substandard — — 2,934 — 584 1,374 1,662 — 6,554 Doubtful/Loss — — — — — — — — — Total farmland loans $ 26,989 $ 18,422 $ 23,856 $ 17,650 $ 9,377 $ 23,783 $ 45,945 $ — $ 166,022 Consumer loans: SFR 1-4 1st DT liens risk ratings Pass $ 224,532 $ 170,331 $ 50,860 $ 35,379 $ 38,529 $ 127,044 $ — $ 3,312 $ 649,987 Special Mention 1,102 — 287 1,149 418 1,754 — 785 5,495 Substandard — — — 1,110 267 4,973 — 511 6,861 Doubtful/Loss — — — — — — — — — Total SFR 1st DT liens $ 225,634 $ 170,331 $ 51,147 $ 37,638 $ 39,214 $ 133,771 $ — $ 4,608 $ 662,343 Term Loans Amortized Cost Basis by Origination Year – As of September 30, 2021 (in thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Consumer loans: SFR HELOCs and Junior Liens Pass $ 591 $ — $ — $ — $ — $ 206 $ 301,235 $ 10,106 $ 312,138 Special Mention — — — — — 86 4,202 719 5,007 Substandard — — — — — 12 4,575 1,526 6,113 Doubtful/Loss — — — — — — — — — Total SFR HELOCs and Junior Liens $ 591 $ — $ — $ — $ — $ 304 $ 310,012 $ 12,351 $ 323,258 Consumer loans: Other risk ratings Pass $ 16,323 $ 17,635 $ 19,492 $ 9,261 $ 2,417 $ 1,187 $ 575 $ — $ 66,890 Special Mention — 49 190 237 105 58 66 — 705 Substandard — 59 85 120 70 110 13 — 457 Doubtful/Loss — — — — — — — — — Total other consumer loans $ 16,323 $ 17,743 $ 19,767 $ 9,618 $ 2,592 $ 1,355 $ 654 $ — $ 68,052 Commercial and industrial loans: Commercial and industrial risk ratings Pass $ 166,972 $ 25,705 $ 30,078 $ 12,775 $ 7,865 $ 8,503 $ 85,476 $ 691 $ 338,065 Special Mention — 2,517 77 357 98 140 95 52 3,336 Substandard — — 158 72 890 555 1,811 140 3,626 Doubtful/Loss — — — — — — — — — Total commercial and industrial loans $ 166,972 $ 28,222 $ 30,313 $ 13,204 $ 8,853 $ 9,198 $ 87,382 $ 883 $ 345,027 Construction loans: Construction risk ratings Pass $ 48,405 $ 80,862 $ 55,870 $ 5,176 $ 1,670 $ 19,048 $ — $ — $ 211,031 Special Mention 4,102 1,087 — — 346 — — — 5,535 Substandard — — — — — 114 — — 114 Doubtful/Loss — — — — — — — — — Total construction loans $ 52,507 $ 81,949 $ 55,870 $ 5,176 $ 2,016 $ 19,162 $ — $ — $ 216,680 Agriculture production loans: Agriculture production risk ratings Pass $ 2,037 $ 945 $ 1,598 $ 1,053 $ 1,091 $ 930 $ 34,526 $ — $ 42,180 Special Mention — — — 163 — 52 1,894 — 2,109 Substandard — — — — — — 121 — 121 Doubtful/Loss — — — — — — — — — Total agriculture production loans $ 2,037 $ 945 $ 1,598 $ 1,216 $ 1,091 $ 982 $ 36,541 $ — $ 44,410 Term Loans Amortized Cost Basis by Origination Year – As of September 30, 2021 (in thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Leases: Lease risk ratings Pass $ 4,989 $ — $ — $ — $ — $ — $ — $ — $4,989 Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful/Loss — — — — — — — — — Total leases $ 4,989 $ — $ — $ — $ — $ — $ — $ — $ 4,989 Total loans outstanding: Risk ratings Pass $ 977,000 $ 639,546 $ 551,706 $ 382,173 $ 441,277 $ 1,114,288 $ 578,376 $ 14,109 $ 4,698,475 Special Mention 21,259 13,041 8,976 13,750 7,235 55,653 17,229 1,556 138,699 Substandard — 59 8,449 3,942 2,835 24,678 8,182 2,177 50,322 Doubtful/Loss — — — — — — — — — Total loans outstanding $ 998,259 $ 652,646 $ 569,131 $ 399,865 $ 451,347 $ 1,194,619 $ 603,787 $ 17,842 $ 4,887,496 Term Loans Amortized Cost Basis by Origination Year – As of December 31, 2020 (in thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Commercial real estate: CRE non-owner occupied risk ratings Pass $ 120,520 $ 207,899 $ 155,730 $ 256,677 $ 179,523 $ 460,644 $ 76,730 $ — $ 1,457,723 Special Mention — 7,455 11,692 5,407 15,773 18,832 12,205 — 71,364 Substandard — — 1,449 584 2,147 2,288 — — 6,468 Doubtful/Loss — — — — — — — — — Total CRE non-owner occupied risk ratings $ 120,520 $ 215,354 $ 168,871 $ 262,668 $ 197,443 $ 481,764 $ 88,935 $ — $ 1,535,555 Commercial real estate: CRE owner occupied risk ratings Pass $ 105,896 $ 75,144 $ 53,816 $ 58,371 $ 54,541 $ 227,828 $ 25,508 $ — $ 601,104 Special Mention — — 288 7,451 2,955 6,140 — — 16,834 Substandard — 1,533 1,301 475 1,306 1,822 — — 6,437 Doubtful/Loss — — — — — — — — — Total CRE owner occupied risk ratings $ 105,896 $ 76,677 $ 55,405 $ 66,297 $ 58,802 $ 235,790 $ 25,508 $ — $ 624,375 Commercial real estate: Multifamily risk ratings Pass $ 77,646 $ 118,725 $ 113,882 $ 70,112 $ 67,457 $ 123,518 $ 19,007 $ — $ 590,347 Special Mention 9,441 — — 603 24,687 772 9,259 — 44,762 Substandard — 4,371 — — — — — — — 4,371 Doubtful/Loss — — — — — — — — — Total multifamily loans $ 87,087 $ 123,096 $ 113,882 $ 70,715 $ 92,144 $ 124,290 $ 28,266 $ — $ 639,480 Term Loans Amortized Cost Basis by Origination Year – As of December 31, 2020 (in thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Commercial real estate: Farmland risk ratings Pass $ 17,640 $ 25,003 $ 19,148 $ 12,834 $ 7,377 $ 17,129 $ 39,411 $ — $ 138,542 Special Mention — 2,567 — 1,271 227 3,107 2,258 — 9,430 Substandard — 700 — 602 — 1,214 2,004 — 4,520 Doubtful/Loss — — — — — — — — — Total farmland loans $ 17,640 $ 28,270 $ 19,148 $ 14,707 $ 7,604 $ 21,450 $ 43,673 $ — $ 152,492 Consumer loans: SFR 1-4 1st DT liens risk ratings Pass $ 183,719 $ 80,717 $ 36,342 $ 53,001 $ 46,467 $ 126,465 $ 76 $ 5,507 $ 532,294 Special Mention — 290 684 110 15 2,936 — 934 4,969 Substandard — — 1,174 929 935 5,763 — 528 9,329 Doubtful/Loss — — — — — — — — — Total SFR 1st DT liens $ 183,719 $ 81,007 $ 38,200 $ 54,040 $ 47,417 $ 135,164 $ 76 $ 6,969 $ 546,592 Consumer loans: SFR HELOCs and Junior Liens Pass $ 793 $ — $ 13 $ 360 $ 300 $ 910 $ 297,160 $ 14,051 $ 313,587 Special Mention — — 16 — — 83 4,504 789 5,392 Substandard — — — — — 39 6,698 1,768 8,505 Doubtful/Loss — — — — — — — — — Total SFR HELOCs and Junior Liens $ 793 $ — $ 29 $ 360 $ 300 $ 1,032 $ 308,362 $ 16,608 $ 327,484 Consumer loans: Other risk ratings Pass $ 25,876 $ 29,539 $ 14,170 $ 4,238 $ 1,020 $ 967 $ 986 $ — $ 76,796 Special Mention 43 208 147 74 24 65 90 — 651 Substandard 58 82 210 74 12 140 9 — 585 Doubtful/Loss — — — — — — — — — Total other consumer loans $ 25,977 $ 29,829 $ 14,527 $ 4,386 $ 1,056 $ 1,172 $ 1,085 $ — $ 78,032 Commercial and industrial loans: Commercial and industrial risk ratings Pass $ 356,701 $ 48,838 $ 20,463 $ 13,151 $ 5,185 $ 9,490 $ 65,938 $ 1,085 $ 520,851 Special Mention — 102 698 195 20 178 207 11 1,411 Substandard — 301 53 1,142 823 148 1,519 79 4,065 Doubtful/Loss — — — — — — — — — Total commercial and industrial loans $ 356,701 $ 49,241 $ 21,214 $ 14,488 $ 6,028 $ 9,816 $ 67,664 $ 1,175 $ 526,327 The following table shows the ending balance of current and past due originated loans by loan category as of the date indicated: Analysis of Past Due Loans - As of September 30, 2021 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total Commercial real estate: CRE non-owner occupied $ 810 $ — $ 120 $ 930 $ 1,525,100 $ 1,526,030 CRE owner occupied 193 — — 193 700,848 701,041 Multifamily 4,729 4,729 824,915 829,644 Farmland — 50 575 625 165,397 166,022 Total commercial real estate loans 5,732 50 695 6,477 3,216,260 3,222,737 Consumer: SFR 1-4 1st DT liens 24 163 216 403 661,940 662,343 SFR HELOCs and junior liens 1,220 205 1,416 2,841 320,417 323,258 Other 23 35 25 83 67,969 68,052 Total consumer loans 1,267 403 1,657 3,327 1,050,326 1,053,653 Commercial and industrial 377 63 127 567 344,460 345,027 Construction — — — — 216,680 216,680 Agriculture production 49 — 119 168 44,242 44,410 Leases — — — — 4,989 4,989 Total $ 7,425 $ 516 $ 2,598 $ 10,539 $ 4,876,957 $ 4,887,496 Analysis of Past Due Loans - As of December 31, 2020 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total Commercial real estate: CRE non-owner occupied $ 127 $ 173 $ 239 $ 539 $ 1,535,016 $ 1,535,555 CRE owner occupied 297 824 1,121 623,254 624,375 Multifamily — — — — 639,480 639,480 Farmland 899 — 70 969 151,523 152,492 Total commercial real estate loans 1,323 173 1,133 2,629 2,949,273 2,951,902 Consumer: SFR 1-4 1st DT liens 37 — 960 997 545,595 546,592 SFR HELOCs and junior liens 418 212 1,671 2,301 325,183 327,484 Other 41 13 100 154 77,878 78,032 Total consumer loans 496 225 2,731 3,452 948,656 952,108 Commercial and industrial 155 426 105 686 525,641 526,327 Construction — — — — 284,842 284,842 Agriculture production — — — — 44,164 44,164 Leases — — — — 3,784 3,784 Total $ 1,974 $ 824 $ 3,969 $ 6,767 $ 4,756,360 $ 4,763,127 The following table shows the ending balance of non accrual loans by loan category as of the date indicated: Non Accrual Loans As of September 30, 2021 As of December 31, 2020 (in thousands) Non accrual with no allowance for credit losses Total non accrual Past due 90 days or more and still accruing Non accrual with no allowance for credit losses Total non accrual Past due 90 days or more and still accruing Commercial real estate: CRE non-owner occupied $ 12,591 $ 7,713 $ — $ 3,110 $ 3,110 $ — CRE owner occupied — 4,877 — 3,111 4,061 — Multifamily 4,560 4,560 — — — — Farmland 1,147 1,147 — 1,468 1,538 — Total commercial real estate loans 18,298 18,297 — 7,689 8,709 — Consumer: SFR 1-4 1st DT liens 3,831 3,833 — 4,950 5,093 — SFR HELOCs and junior liens 3,282 4,034 — 4,480 6,148 — Other 52 84 — 68 167 — Total consumer loans 7,165 7,951 — 9,498 11,408 — Commercial and industrial 1,339 2,407 — 652 2,183 — Construction 15 15 — 4,546 4,546 — Agriculture production — 120 — 5 18 — Leases — — — — — — Sub-total 26,817 28,790 — 22,390 26,864 — Less: Guaranteed loans (679) (775) — (687) (811) Total, net $ 26,138 $ 28,015 $ — $ 21,703 $ 26,053 $ — Interest income on non accrual loans that would have been recognized during the three months ended September 30, 2021 and 2020, if all such loans had been current in accordance with their original terms, totaled $412,000 and $303,000, respectively. Interest income actually recognized on these originated loans during the three months ended September 30, 2021 and 2020 was $117,000 and $187,000, respectively. Interest income on non accrual loans that would have been recognized during the nine months ended September 30, 2021 and 2020, if all such loans had been current in accordance with their original terms, totaled $1,472,000 and $1,162,000, respectively. Interest income actually recognized on these originated loans during the nine months ended September 30, 2021 and 2020 was $293,000 and $321,000, respectively. The following tables present the amortized cost basis of collateral dependent loans by class of loans as of the following periods: As of September 30, 2021 (in thousands) Retail Office Warehouse Other Multifamily Farmland SFR -1st Deed SFR -2nd Deed Automobile/Truck A/R and Inventory Equipment Total Commercial real estate: CRE non-owner occupied $ 2,858 $ 1,285 $ 1,583 $ 6,865 $ — $ — $ — $ — $ — $ — $ — $ 12,591 CRE owner occupied — — — — — — — — — — — — Multifamily — — — — 4,560 — — — — — — 4,560 Farmland — — — — — 1,147 — — — — — 1,147 Total commercial real estate loans 2,858 1,285 1,583 6,865 4,560 1,147 — — — — — 18,298 Consumer: SFR 1-4 1st DT liens — — — — — — 3,830 — — — — 3,830 SFR HELOCs and junior liens — — — — — — 1,574 1,848 — — — 3,422 Other — — — 44 — — — — 18 — 12 74 Total consumer loans — — — 44 — — 5,404 1,848 18 — 12 7,326 Commercial and industrial — — — — — — — — — 2,231 130 2,361 Construction — — — — — — 16 — — — — 16 Agriculture production — — — 120 — — — — — — — 120 Leases — — — — — — — — — — — — Total $ 2,858 $ 1,285 $ 1,583 $ 7,029 $ 4,560 $ 1,147 $ 5,420 $ 1,848 $ 18 $ 2,231 $ 142 $ 28,121 As of December 31, 2020 (in thousands) Retail Office Warehouse Other Multifamily Farmland SFR -1st Deed SFR -2nd Deed Automobile/Truck A/R and Inventory Equipment Total Commercial real estate: CRE non-owner occupied $ 2,445 $ 435 $ — $ — $ — $ — $ — $ — $ — $ — $ — $ 2,880 CRE owner occupied 796 1,176 1,668 — — — — — — — — 3,640 Multifamily — — — — — — — — — — — — Farmland — — — — — — 1,538 — — — — — 1,538 Total commercial real estate loans 3,241 1,611 1,668 — — 1,538 — — — — — 8,058 Consumer: SFR 1-4 1st DT liens — — — — — — 5,068 — — — — 5,068 SFR HELOCs and junior liens — — — — — — 1,855 2,839 — — — 4,694 Other — — — 42 — — — — 97 — — 139 Total consumer loans — — — 42 — — 6,923 2,839 97 — — 9,901 Commercial and industrial — — — 292 — — — — — 1,173 75 1,540 Construction — — — — — — 4,546 — — — — 4,546 Agriculture production — — — — — — — — — 13 5 18 Leases — — — — — — — — — — — — Total $ 3,241 $ 1,611 $ 1,668 $ 334 $ — $ 1,538 $ 11,469 $ 2,839 $ 97 $ 1,186 $ 80 $ 24,063 TDR information for the three months ended September 30, 2021 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Commercial real estate: CRE non-owner occupied 3 $ 3,943 $ 3,938 $ — — $ — $ — CRE owner occupied — — — — — — — Multifamily — — — — — — — Farmland 1 50 50 50 — — — Total commercial real estate loans 4 3,993 3,988 50 — — — Consumer: SFR 1-4 1st DT liens — — — — — — — SFR HELOCs and junior liens — — — — — — — Other — — — — — — — Total consumer loans — — — — — — — Commercial and industrial 2 160 159 106 1 13 (5) Construction — — — — — — — Agriculture production — — — — — — — Leases — — — — — — — Total 6 $ 4,153 $ 4,147 $ 156 1 $ 13 $ (5) TDR information for the three months ended September 30, 2020 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Commercial real estate: CRE non-owner occupied 1 $ 319 $ 314 $ 314 1 $ 141 $ — CRE owner occupied 5 2,422 2,341 67 2 1,401 — Multifamily — — — — — — — Farmland — — — — — — — Total commercial real estate loans 6 2,741 2,655 381 3 1,542 — Consumer: SFR 1-4 1st DT liens — — — — — — — SFR HELOCs and junior liens — — — — 1 143 — Other — — — — — — — Total consumer loans — — — — 1 143 — Commercial and industrial — — — — — — — Construction — — — — — — — Agriculture production — — — — — — — Leases — — — — — — — Total 6 $ 2,741 $ 2,655 $ 381 $ 4 $ 1,685 $ — TDR Information for the nine months ended September 30, 2021 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Commercial real estate: CRE non-owner occupied 5 $ 4,966 $ 4,956 $ 1,020 — $ — $ — CRE owner occupied 1 740 742 742 — — — Multifamily — — — — — — — Farmland 1 50 50 50 3 847 — Total commercial real estate loans 7 5,756 5,748 1,812 3 847 — Consumer: SFR 1-4 1st DT liens — — — — — — — SFR HELOCs and junior liens — — — — — — — Other — — — — — — — Total consumer loans — — — — — — — Commercial and industrial 7 2,476 2,469 709 2 260 (5) Construction — — — — — — — Agriculture production — — — — — — — Leases — — — — — — — Total 14 $ 8,232 $ 8,217 $ 2,521 5 $ 1,107 $ (5) TDR Information for the nine months ended September 30, 2020 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Commercial real estate: CRE non-owner occupied 2 $ 576 $ 565 $ 314 1 $ 141 $ — CRE owner occupied 5 2,422 2,341 67 2 1,401 — Multifamily — — — — — — — Farmland 2 229 298 — — — — Total commercial real estate loans 9 3,227 3,204 381 3 1,542 — Consumer: SFR 1-4 1st DT liens — — — — 2 1,037 — SFR HELOCs and junior liens 2 172 169 — — — — Other — — — — — — — Total consumer loans 2 172 169 — 2 1,037 — Commercial and industrial — — — — — — — Construction 1 21 20 21 — — — Agriculture production — — — — — — — Leases — — — — — — — Total 12 $ 3,420 $ 3,393 $ 402 5 $ 2,579 $ — The Company also modified the terms of select loans in an effort to assist borrowers that were not related to the COVID-19 pandemic. If the borrower was experiencing financial difficulty and a concession was granted, the Company considered such modifications as troubled debt restructurings. Modifications classified as TDRs can include one or a combination of the following: rate modifications, term extensions, interest only modifications, either temporary or long-term, payment modifications, and collateral substitutions/additions. The objective of the modifications was to increase loan repayments by customers and thereby reduce net charge-offs. The modified loans are included in impaired loans for purposes of determining the level of the allowance for credit losses. For all new TDRs, an impairment analysis is conducted. If the loan is determined to be collateral dependent, any additional amount of impairment will be calculated based on the difference between estimated collectible value and the current carrying balance of the loan. This difference could result in an increased provision and is typically charged off. If the asset is determined not to be collateral dependent, the impairment is measured on the net present value difference between the expected cash flows of the restructured loan and the cash flows which would have been received under the original terms. The effect of this could result in a requirement for additional provision to the

Leases

Leases	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Leases	Leases The Company records a right-of-use asset (“ROUA”) on the consolidated balance sheets for those leases that convey rights to control use of identified assets for a period of time in exchange for consideration. The Company also records a lease liability on the consolidated balance sheets for the present value of future payment commitments. All of the Company’s leases are comprised of operating leases in which the Company is lessee of real estate property for branches, ATM locations, and general administration and operations. The Company has elected not to include short-term leases (i.e. leases with initial terms of 12 month or less) within the ROUA and lease liability. Known or determinable adjustments to the required minimum future lease payments were included in the calculation of the Company’s ROUA and lease liability. Adjustments to the required minimum future lease payments that are variable and will not be determinable until a future period, such as changes in the consumer price index, are included as variable lease costs. Additionally, expected variable payments for common area maintenance, taxes and insurance were unknown and not determinable at lease commencement and therefore, were not included in the determination of the Company’s ROUA or lease liability. The value of the ROUA and lease liability is impacted by the amount of the periodic payment required, length of the lease term, and the discount rate used to calculate the present value of the minimum lease payments. The Company’s lease agreements often include one or more options to renew at the Company’s discretion. If at lease inception, the Company considers the exercising of a renewal option to be reasonably certain, the Company will include the extended term in the calculation of the ROU asset and lease liability. Topic 842 requires the use of the rate implicit in the lease whenever this rate is readily determinable. As this rate is rarely determinable, the Company utilizes its incremental borrowing rate at lease inception, on a collateralized basis, over a similar term. The lease liability is reduced based on the discounted present value of remaining payments as of each reporting period. The ROUA value is measured using the amount of lease liability and adjusted for prepaid or accrued lease payments, remaining lease incentives, unamortized direct costs (if any), and impairment (if any). The following table presents the components of lease expense for the periods ended: Three months ended September 30, Nine months ended September 30, (in thousands) 2021 2020 2021 2020 Operating lease cost $ 1,328 $ 1,284 $ 3,854 $ 3,869 Short-term lease cost 57 67 180 195 Variable lease cost 8 (1) 5 6 Sublease income — (33) (24) (102) Total lease cost $ 1,393 $ 1,317 $ 4,015 $ 3,968 The following table presents supplemental cash flow information related to leases for the periods ended: Three months ended September 30, Nine months ended September 30, (in thousands) 2021 2020 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 1,261 $ 1,236 $ 3,690 $ 3,716 ROUA obtained in exchange for operating lease liabilities $ 1,575 $ 93 $ 2,883 $ 4,161 The following table presents the weighted average operating lease term and discount rate as of the period ended: September 30, 2021 2020 Weighted-average remaining lease term (years) 9.3 10.0 Weighted-average discount rate 2.92 % 3.10 % At September 30, 2021, future expected operating lease payments are as follows: (in thousands) Periods ending December 31, 2021 $ 1,215 2022 4,714 2023 4,071 2024 3,716 2025 3,132 Thereafter 15,057 31,905 Discount for present value of expected cash flows (4,615) Lease liability at September 30, 2021 $ 27,290

Deposits

Deposits	9 Months Ended
	Sep. 30, 2021
Deposits [Abstract]
Deposits	Deposits A summary of the balances of deposits follows: (in thousands) September 30, December 31, Noninterest-bearing demand $ 2,943,016 $ 2,581,517 Interest-bearing demand 1,519,426 1,414,908 Savings 2,447,706 2,164,942 Time certificates, $250,000 or more 58,503 73,147 Other time certificates 268,171 271,420 Total deposits $ 7,236,822 $ 6,505,934 Certificate of deposit balances of $10,000,000 from the State of California were included in time certificates, over $250,000, at September 30, 2021 and December 31, 2020, respectively. The Company participates in a deposit program offered by the State of California whereby the State may make deposits at the Company’s request subject to collateral and credit worthiness constraints. The negotiated rates on these State deposits are generally more favorable than other wholesale funding sources available to the Company. Overdrawn deposit balances of $1,110,000 and $985,000 were classified as consumer loans at September 30, 2021 and December 31, 2020, respectively.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The following table presents a summary of the Bank’s commitments and contingent liabilities: (in thousands) September 30, December 31, Financial instruments whose amounts represent risk: Commitments to extend credit: Commercial loans $ 405,112 $ 462,422 Consumer loans 595,148 534,223 Real estate mortgage loans 321,745 202,306 Real estate construction loans 209,407 227,876 Standby letters of credit 23,207 15,056 Deposit account overdraft privilege 111,980 110,813

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Shareholders' Equity	Shareholders’ Equity Dividends Paid The Bank paid to the Company cash dividends in the aggregate amounts of $7,058,000 and $6,913,000 during the three months ended September 30, 2021 and 2020, respectively, and $23,197,000 and $46,361,000 during the nine months ended September 30, 2021 and 2020, respectively. The Bank is regulated by the Federal Deposit Insurance Corporation (FDIC) and the State Department of Financial Protection and Innovation (DFPI). Absent approval from the Commissioner of the DFPI, California banking laws generally limit the Bank’s ability to pay dividends to the lesser of (1) retained earnings or (2) net income for the last three fiscal years, less cash distributions paid during such period. Stock Repurchase Plan On February 25, 2021 the Board of Directors approved the authorization to repurchase up to 2,000,000 shares of the Company's common stock (the 2021 Repurchase Plan), which approximated 6.7% of the shares outstanding as of the approval date. The actual timing of any share repurchases will be determined by the Company's management and therefore the total value of the shares to be purchased under the program is subject to change. The 2021 Repurchase Plan has no expiration date (in accordance with applicable laws and regulations) and during the three and nine month periods September 30, 2021, the Company repurchased 17,963 and 63,317 shares with a market value of $730,000 and $2,831,000, respectively. In connection with approval of the 2021 Repurchase Plan, the Company’s previous repurchase program adopted on November 12, 2019 (the 2019 Repurchase Plan) was terminated. Under the 2019 Repurchase Plan, during the nine months ended September 30, 2021, the Company repurchased 223 shares with a market value of approximately $8,000. The Company repurchased 858,717 shares during 2020. Stock Repurchased Under Equity Compensation Plans The Company's shareholder-approved equity compensation plans permit employees to tender recently vested shares in lieu of cash for the payment of exercise price, if applicable, and the tax withholding on such shares. During the three months ended September 30, 2021 and 2020, employees tendered zero and 7,820 shares, respectively, of the Company’s common stock in connection with option exercises. During the nine months ended September 30, 2021 and 2020, employees tendered zero and 12,488 shares, respectively, of the Company’s common stock in connection with option exercises. Employees also tendered 9,683 and 619 shares in connection with the tax withholding requirements of other share based awards during the three months ended September 30, 2021 and 2020, respectively, and 19,413 and 12,058 during the nine months ended September 30, 2021 and 2020, respectively. In total, shares of the Company's common stock tendered had market values of $384,000 and $242,000 during the quarters ended September 30, 2021 and 2020, respectively, and $836,000 and $588,000 during the year to date periods September 30, 2021 and 2020, respectively. The tendered shares were retired. The market value of tendered shares is the last market trade price at closing on the day an option is exercised or the other share based award vests. Stock repurchased under equity incentive plans are not included in the total of stock repurchased under the 2021 or 2019 Stock Repurchase Plans.

Stock Options and Other Equity-

Stock Options and Other Equity-Based Incentive Instruments	9 Months Ended
	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Stock Options and Other Equity-Based Incentive Instruments	Stock Options and Other Equity-Based Incentive Instruments On April 16, 2019, the Board of Directors adopted the 2019 Equity Incentive Plan (2019 Plan) which was approved by shareholders on May 21, 2019. The 2019 Plan allows for up to 1,500,000 shares to be issued in connection with equity-based incentives. The Company’s 2009 Equity Incentive Plan (2009 Plan) expired on March 26, 2019. While no new awards can be granted under the 2009 Plan, existing grants continue to be governed by the terms, conditions and procedures set forth in any applicable award agreement. Stock option activity during the nine months ended September 30, 2021 is summarized in the following table: Number Weighted Outstanding at December 31, 2020 128,500 $ 17.72 Options granted — — Options exercised (5,675) 15.20 Options forfeited — — Outstanding at September 30, 2021 122,825 $ 17.80 The following table shows the number, weighted-average exercise price, intrinsic value, and weighted average remaining contractual life of options exercisable, options not yet exercisable and total options outstanding as of September 30, 2021: Currently Currently Not Total Number of options 122,825 — 122,825 Weighted average exercise price $ 17.80 $ — $ 17.80 Intrinsic value (in thousands) $ 3,144 $ — $ 3,144 Weighted average remaining contractual term (yrs.) 1.3 0.0 1.5 As of September 30, 2021 all options outstanding are fully vested and are expected to be exercised prior to expiration. The Company did not modify any option grants during 2020 or the nine months ended September 30, 2021. Activity related to restricted stock unit awards during the nine months ended September 30, 2021 is summarized in the following table: Service Market Plus Outstanding at December 31, 2020 99,809 81,615 RSUs granted 47,029 31,479 RSUs added through dividend and performance credits 1,687 6,067 RSUs released (45,401) (19,272) RSUs forfeited/expired (190) (126) Outstanding at September 30, 2021 102,934 99,763 The 102,934 of service condition vesting RSUs outstanding as of September 30, 2021 include a feature whereby each RSU outstanding is credited with a dividend amount equal to any common stock cash dividend declared and paid, and the credited amount is divided by the closing price of the Company’s stock on the dividend payable date to arrive at an additional amount of RSUs outstanding under the original grant. The dividend credits follow the same vesting requirements as the RSU awards and are not considered participating securities. The 102,934 of service condition vesting RSUs outstanding as of September 30, 2021 are expected to vest, and be released, on a weighted-average basis, over the next 1.6 years. The Company expects to recognize $3,406,000 of pre-tax compensation costs related to these service condition vesting RSUs between September 30, 2021 and their vesting dates. The Company did not modify any service condition vesting RSUs during 2020 or during the nine months ended September 30, 2021. The 99,763 of market plus service condition vesting RSUs outstanding as of September 30, 2021 are expected to vest, and be released, on a weighted-average basis, over the next 1.8 years. The Company expects to recognize $1,852,000 of pre-tax compensation costs related to these RSUs between September 30, 2021 and their vesting dates. As of September 30, 2021, the number of market plus service condition vesting RSUs outstanding that will actually vest, and be released, may be reduced to zero or increased to 149,645 depending on the total return of the Company’s common stock versus the total return of an index of bank stocks from the grant date to the vesting date. The Company did not modify any market plus service condition vesting RSUs during 2020 or during the nine months ended September 30, 2021.

Non-interest Income and Expense

Non-interest Income and Expense	9 Months Ended
	Sep. 30, 2021
Other Income and Expenses [Abstract]
Non-interest Income and Expense	Non-interest Income and Expense The following table summarizes the Company’s non-interest income for the periods indicated: Three months ended Nine months ended (in thousands) 2021 2020 2021 2020 ATM and interchange fees $ 6,516 $ 5,637 $ 18,935 $ 15,913 Service charges on deposit accounts 3,608 3,334 10,339 10,426 Other service fees 897 805 2,682 2,296 Mortgage banking service fees 476 457 1,406 1,386 Change in value of mortgage servicing rights (232) 236 (691) (2,258) Total service charges and fees 11,265 10,469 32,671 27,763 Increase in cash value of life insurance 644 773 2,062 2,203 Asset management and commission income 957 667 2,738 2,244 Gain on sale of loans 1,814 3,035 7,908 5,662 Lease brokerage income 183 175 542 495 Sale of customer checks 107 91 342 303 Gain on sale of investment securities — 7 — 7 Gain (loss) on marketable equity securities (14) — (59) 72 Other 139 (80) 958 (135) Total other non-interest income 3,830 4,668 14,491 10,851 Total non-interest income $ 15,095 $ 15,137 $ 47,162 $ 38,614 The components of non-interest expense were as follows: Three months ended Nine months ended (in thousands) 2021 2020 2021 2020 Base salaries, net of deferred loan origination costs $ 17,673 $ 18,754 $ 50,721 $ 53,654 Incentive compensation 3,123 2,184 11,025 7,680 Benefits and other compensation costs 5,478 8,383 16,939 22,314 Total salaries and benefits expense 26,274 29,321 78,685 83,648 Occupancy 3,771 3,440 11,197 10,713 Data processing and software 3,689 3,561 10,092 10,585 Equipment 1,336 1,549 4,060 4,411 Intangible amortization 1,409 1,431 4,271 4,293 Advertising 966 869 2,080 2,065 ATM and POS network charges 1,692 1,314 4,489 3,897 Professional fees 1,090 955 2,730 2,399 Telecommunications 574 619 1,719 1,983 Regulatory assessments and insurance 673 538 1,903 993 Merger and acquisition expense 651 — 651 — Postage 156 118 478 691 Operational losses 244 154 665 559 Courier service 286 345 868 1,013 Gain on sale or acquisition of foreclosed assets (144) — (210) (57) (Gain) loss on disposal of fixed assets (19) 22 (445) 37 Other miscellaneous expense 3,159 2,478 8,363 9,783 Total other non-interest expense 19,533 17,393 52,911 53,365 Total non-interest expense $ 45,807 $ 46,714 $ 131,596 $ 137,013

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share represent income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per share reflect additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustments to income that would result from assumed issuance. Potential common shares that may be issued by the Company relate to outstanding stock options and restricted stock units (RSUs), and are determined using the treasury stock method. Earnings per share have been computed based on the following: Three months ended September 30, (in thousands) 2021 2020 Net income $ 27,422 $ 17,606 Average number of common shares outstanding 29,714 29,764 Effect of dilutive stock options and restricted stock 137 80 Average number of common shares outstanding used to calculate diluted earnings per share 29,851 29,844 Options excluded from diluted earnings per share because of their antidilutive effect — — Nine months ended September 30, (in thousands) 2021 2020 Net income $ 89,433 $ 41,157 Average number of common shares outstanding 29,720 29,971 Effect of dilutive stock options and restricted stock 167 112 Average number of common shares outstanding used to calculate diluted earnings per share 29,887 30,083 Options excluded from diluted earnings per share because of their antidilutive effect — —

Comprehensive Income (Loss)

Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Comprehensive Income (Loss)	Comprehensive Income (Loss)Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available-for-sale securities, are reported as a separate component of the equity section of the balance sheet identified as accumulated other comprehensive income (AOCI), such items, along with net income, are components of other comprehensive income (loss) (OCI). The components of other comprehensive income (loss) and related tax effects are as follows: Three months ended September 30, Nine months ended (in thousands) 2021 2020 2021 2020 Unrealized holding losses on available for sale securities before reclassifications $ (6,304) $ 4,645 $ (11,249) $ 10,043 Amounts reclassified out of AOCI: Realized gain on debt securities — (7) — (7) Unrealized holding losses on available for sale securities after reclassifications (6,304) 4,638 (11,249) 10,036 Tax effect 1,864 (1,372) 3,325 (2,967) Unrealized holding losses on available for sale securities, net of tax (4,440) 3,266 (7,924) 7,069 Change in unfunded status of the supplemental retirement plans before reclassifications (49) 1,936 (147) 2,607 Amounts reclassified out of AOCI: Amortization of prior service cost (14) (14) (43) (41) Amortization of actuarial losses 63 478 190 1,434 Total amounts reclassified out of accumulated other comprehensive income 49 464 147 1,393 Change in unfunded status of the supplemental retirement plans after reclassifications — 2,400 — 4,000 Tax effect — (709) — (1,183) Change in unfunded status of the supplemental retirement plans, net of tax — 1,691 — 2,817 Change in joint beneficiary agreement liability before reclassifications — — (629) 912 Tax effect — — — — Change in joint beneficiary agreement liability before reclassifications, net of tax — — (629) 912 Total other comprehensive income (loss) $ (4,440) $ 4,957 $ (8,553) $ 10,798 The components of accumulated other comprehensive income, included in shareholders’ equity, are as follows: (in thousands) September 30, December 31, Net unrealized gain on available for sale securities $ 7,934 $ 19,183 Tax effect (2,346) (5,671) Unrealized holding gain on available for sale securities, net of tax 5,588 13,512 Unfunded status of the supplemental retirement plans (1,294) (1,294) Tax effect 382 382 Unfunded status of the supplemental retirement plans, net of tax (912) (912) Joint beneficiary agreement liability (949) (320) Tax effect — — Joint beneficiary agreement liability, net of tax (949) (320) Accumulated other comprehensive income $ 3,727 $ 12,280

Fair Value Measurement

Fair Value Measurement	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurement	Fair Value Measurement The Company utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, income approach, and/or the cost approach. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability including assumptions about the risk inherent in a particular valuation technique, the effect of a restriction on the sale or use of an asset and the risk of nonperformance. Marketable equity securities, debt securities available-for-sale, loans held for sale, and mortgage servicing rights are recorded at fair value on a recurring basis. Additionally, from time to time, the Company may be required to record at fair value other assets on a nonrecurring basis, such loans held for investment and certain other assets. These nonrecurring fair value adjustments typically involve application impairment write-downs of individual assets. The Company groups assets and liabilities at fair value in three levels, based on the markets in which the assets and liabilities are traded and the observable nature of the assumptions used to determine fair value. These levels are: Level 1 - Valuation is based upon quoted prices for identical instruments traded in active markets. Level 2 - Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. Level 3 - Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques. Marketable equity securities and debt securities available for sale - Marketable equity securities and debt securities available for sale are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted prices, if available. If quoted prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security’s credit rating, prepayment assumptions and other factors such as credit loss assumptions. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange, U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets and money market funds. Level 2 securities include mortgage-backed securities issued by government sponsored entities, municipal bonds and corporate debt securities. The Company had no securities classified as Level 3 during any of the periods covered in these financial statements. Loans held for sale - Loans held for sale are carried at the lower of cost or fair value. The fair value of loans held for sale is based on what secondary markets are currently offering for loans with similar characteristics. As such, we classify those loans subjected to recurring fair value adjustments as Level 2. Individually evaluated loans - Loans are not recorded at fair value on a recurring basis. However, from time to time, certain loans have individual risk characteristics not consistent with a pool of loans and is individually evaluated for credit reserves. Loans for which it is probable that payment of interest and principal will not be made in accordance with the original contractual terms of the loan agreement are typically individually evaluated. The fair value of these loans are estimated using one of several methods, including collateral value, fair value of similar debt, enterprise value, liquidation value and discounted cash flows. Those loans not requiring an allowance represent loans for which the fair value of the expected repayments or collateral exceed the recorded investments in such loans. Loans where an allowance is established based on the fair value of collateral require classification in the fair value hierarchy. When the fair value of the collateral is based on an observable market price or a current appraised value which uses substantially observable data, the Company records the loan as nonrecurring Level 2. When an appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value, or the appraised value contains a significant unobservable assumption, such as deviations from comparable sales, and there is no observable market price, the Company records the loan as nonrecurring Level 3. Foreclosed assets - Foreclosed assets include assets acquired through, or in lieu of, loan foreclosure. Foreclosed assets are held for sale and are initially recorded at fair value at the date of foreclosure, establishing a new cost basis. Subsequent to foreclosure, management periodically performs valuations and the assets are carried at the lower of carrying amount or fair value less cost to sell. When the fair value of foreclosed assets is based on an observable market price or a current appraised value which uses substantially observable data, the Company records the loan as nonrecurring Level 2. When an appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value, or the appraised value contains a significant unobservable assumption, such as deviations from comparable sales, and there is no observable market price, the Company records the foreclosed asset as nonrecurring Level 3. Revenue and expenses from operations and changes in the valuation allowance are included in other non-interest expense. Mortgage servicing rights - Mortgage servicing rights are carried at fair value. A valuation model, which utilizes a discounted cash flow analysis using a discount rate and prepayment speed assumptions is used in the computation of the fair value measurement. While the prepayment speed assumption is currently quoted for comparable instruments, the discount rate assumption currently requires a significant degree of management judgment and is therefore considered an unobservable input. As such, the Company classifies mortgage servicing rights subjected to recurring fair value adjustments as Level 3. The table below presents the recorded amount of assets and liabilities measured at fair value on a recurring basis (in thousands): Fair value at September 30, 2021 Total Level 1 Level 2 Level 3 Marketable equity securities $ 2,965 $ 2,965 Debt securities available for sale: Obligations of U.S. government corporations and agencies 1,244,616 1,244,616 Obligations of states and political subdivisions 168,107 168,107 Corporate bonds 6,796 6,796 Asset backed securities 676,302 676,302 Loans held for sale 3,072 3,072 Mortgage servicing rights 5,736 5,736 Total assets measured at fair value $ 2,107,594 $ 2,965 $ 2,098,893 $ 5,736 Fair value at December 31, 2020 Total Level 1 Level 2 Level 3 Marketable equity securities $ 3,025 $ 3,025 $ — $ — Debt securities available for sale: Obligations of U.S. government corporations and agencies 812,374 — 812,374 — Obligations of states and political subdivisions 129,095 — 129,095 — Corporate bonds 2,544 — 2,544 — Asset backed securities 470,251 — 470,251 — Loans held for sale 6,268 — 6,268 — Mortgage servicing rights 5,092 — — 5,092 Total assets measured at fair value $ 1,428,649 $ 3,025 $ 1,420,532 $ 5,092 Transfers between levels of the fair value hierarchy are recognized on the actual date of the event or circumstances that caused the transfer, which generally corresponds with the Company’s quarterly valuation process. There were no transfers between any levels during the nine months ended September 30, 2021, or the year ended December 31, 2020. The following table provides a reconciliation of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the time periods indicated. Had there been any transfer into or out of Level 3 during the time periods indicated, the amount included in the “Transfers into (out of) Level 3” column would represent the beginning balance of an item in the period (interim quarter) during which it was transferred (in thousands): Three months ended September 30, Beginning Transfers Change Issuances Ending 2021: Mortgage servicing rights $ 5,603 — $ (233) $ 366 $ 5,736 2020: Mortgage servicing rights $ 4,250 — $ 236 $ 434 $ 4,920 Nine months ended September 30, Beginning Transfers Change Issuances Ending 2021: Mortgage servicing rights $ 5,092 $ (691) $ 1,335 $ 5,736 2020: Mortgage servicing rights $ 6,200 — $ (2,258) $ 978 $ 4,920 The key unobservable inputs used in determining the fair value of mortgage servicing rights are mortgage prepayment speeds and the discount rate used to discount cash projected cash flows. Generally, any significant increases in the mortgage prepayment speed and discount rate utilized in the fair value measurement of the mortgage servicing rights will result in a negative fair value adjustments (and decrease in the fair value measurement). Conversely, a decrease in the mortgage prepayment speed and discount rate will result in a positive fair value adjustment (and increase in the fair value measurement). The following table presents quantitative information about recurring Level 3 fair value measurements at September 30, 2021 and December 31, 2020: As of September 30, 2021: Fair Value Valuation Unobservable Range, Mortgage Servicing Rights $ 5,736 Discounted cash flow Constant prepayment rate 12% - 17%; 13.3% Discount rate 10% - 14%; 12% As of December 31, 2020: Mortgage Servicing Rights $ 5,092 Discounted cash flow Constant prepayment rate 14% - 20.0%; 17.6% Discount rate 10% - 14%; 12% The tables below present the recorded investment in assets and liabilities measured at fair value on a nonrecurring basis, as of the dates indicated (in thousands): September 30, 2021 Total Level 1 Level 2 Level 3 Total Gains (Losses) Fair value: Individually evaluated loans $ 2,942 — — $ 2,942 $ (840) Foreclosed assets 447 — — 447 113 Total assets measured at fair value $ 3,389 $ — $ — $ 3,389 $ (727) December 31, 2020 Total Level 1 Level 2 Level 3 Total Gains (Losses) Fair value: Individually evaluated loans $ 1,424 — — $ 1,424 $ (1,489) Foreclosed assets 979 — — 979 155 Total assets measured at fair value $ 2,403 — — $ 2,403 $ (1,334) September 30, 2020 Total Level 1 Level 2 Level 3 Total Losses Fair value: Individually evaluated loans $ 1,024 — — $ 1,024 $ (309) The individually evaluated loan amounts above represent collateral dependent loans that have been adjusted to fair value. When the Company identifies a collateral dependent loan with unique risk characteristics, the Company evaluates the need for an allowance using the current fair value of the collateral, less selling costs. Depending on the characteristics of a loan, the fair value of collateral is generally estimated by obtaining external appraisals. If the Company determines that the value of the loan is less than the recorded investment in the loan, the Company recognizes this impairment and adjust the carrying value of the loan to fair value through the allowance for credit losses. The loss represents charge-offs or impairments on collateral dependent loans for fair value adjustments based on the fair value of collateral. The carrying value of loans fully charged-off is zero. The foreclosed assets amount above represents impaired real estate that has been adjusted to fair value. Foreclosed assets represent real estate which the Company has taken control of in partial or full satisfaction of loans. At the time of foreclosure, other real estate owned is recorded at fair value less costs to sell, which becomes the property’s new basis. Any write-downs based on the asset’s fair value at the date of acquisition are charged to the allowance for credit losses. After foreclosure, management periodically performs valuations such that the real estate is carried at the lower of its new cost basis or fair value, net of estimated costs to sell. Fair value adjustments on other real estate owned are recognized within net loss on real estate owned. The loss represents impairments on real estate owned for fair value adjustments based on the fair value of the real estate. The Company’s property appraisals are primarily based on the sales comparison approach and income approach methodologies, which consider recent sales of comparable properties, including their income generating characteristics, and then make adjustments to reflect the general assumptions that a market participant would make when analyzing the property for purchase. These adjustments may increase or decrease an appraised value and can vary significantly depending on the location, physical characteristics and income producing potential of each property. Additionally, the quality and volume of market information available at the time of the appraisal can vary from period to period and cause significant changes to the nature and magnitude of comparable sale adjustments. Given these variations, comparable sale adjustments are generally not a reliable indicator for how fair value will increase or decrease from period to period. Under certain circumstances, management discounts are applied based on specific characteristics of an individual property. The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at September 30, 2021: September 30, 2021 Fair Value Valuation Unobservable Inputs Range, Individually evaluated loans $ 2,942 Sales comparison Adjustment for differences between Not meaningful Foreclosed assets (Residential real estate) $ 447 Sales comparison Adjustment for differences between Not meaningful The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at December 31, 2020: December 31, 2020 Fair Value Valuation Unobservable Inputs Range, Individually evaluated loans $ 1,424 Sales comparison Adjustment for differences between Not meaningful Foreclosed assets (Residential real estate) $ 979 Sales comparison Adjustment for differences between Not meaningful Fair values for financial instruments are management’s estimates of the values at which the instruments could be exchanged in a transaction between willing parties. The Company uses the exit price notion when measuring the fair value of financial instruments. These estimates are subjective and may vary significantly from amounts that would be realized in actual transactions. In addition, other significant assets are not considered financial assets including, any mortgage banking operations, deferred tax assets, and premises and equipment. Further, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on the fair value estimates and have not been considered in any of these estimates. September 30, 2021 December 31, 2020 (in thousands) Carrying Fair Carrying Fair Financial assets: Level 1 inputs: Cash and due from banks $ 83,188 $ 83,188 $ 77,253 $ 77,253 Cash at Federal Reserve and other banks 657,048 657,048 592,298 592,298 Level 2 inputs: Securities held to maturity 216,979 228,174 284,563 298,726 Restricted equity securities 17,250 N/A 17,250 N/A Level 3 inputs: Loans, net 4,803,190 4,808,023 4,671,280 4,753,027 Financial liabilities: Level 2 inputs: Deposits 7,236,822 7,243,986 6,505,934 6,507,235 Other borrowings 45,601 45,601 26,914 26,914 Level 3 inputs: Junior subordinated debt 57,965 57,907 57,635 56,632 (in thousands) Contract Fair Contract Fair Off-balance sheet: Level 3 inputs: Commitments $ 1,531,412 $ 15,314 $ 1,426,827 $ 14,268 Standby letters of credit 23,207 232 15,056 151 Overdraft privilege commitments 111,980 1,119 110,813 1,108

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2021
Banking Regulation, Global Systemically Important Bank (GSIB) Surcharge [Abstract]
Regulatory Matters	Regulatory Matters The Company is subject to various regulatory capital requirements administered by federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company must meet specific capital guidelines that involve quantitative measures of the Company’s assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting practices. The Company’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Company to maintain minimum amounts and ratios (set forth in the table below) of total, Tier 1, and common equity Tier 1 capital to risk-weighted assets, and of Tier 1 capital to average assets. The following tables present actual and required capital ratios as of September 30, 2021 and December 31, 2020 for the Company and the Bank under applicable Basel III Capital Rules. The minimum capital amounts presented include the minimum required capital levels as of September 30, 2021 and December 31, 2020 based on the then phased-in provisions of the Basel III Capital Rules. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended to reflect the changes under the Basel III Capital Rules. Actual Required for Capital Adequacy Purposes Required to be As of September 30, 2021: Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total Capital (to Risk Weighted Assets): Consolidated $ 869,196 15.41 % $ 592,435 10.50 % N/A N/A Tri Counties Bank $ 860,080 15.26 % $ 591,775 10.50 % $ 563,595 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 798,433 14.15 % $ 479,590 8.50 % N/A N/A Tri Counties Bank $ 789,416 14.01 % $ 479,056 8.50 % $ 450,876 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 742,209 13.15 % $ 394,957 7.00 % N/A N/A Tri Counties Bank $ 789,416 14.01 % $ 394,517 7.00 % $ 366,337 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 798,433 9.85 % $ 324,391 4.00 % N/A N/A Tri Counties Bank $ 789,416 9.74 % $ 324,254 4.00 % $ 405,317 5.00 % Actual Required for Capital Adequacy Purposes Required to be As of December 31, 2020: Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total Capital (to Risk Weighted Assets): Consolidated $ 793,433 15.22 % $ 547,352 10.50 % N/A N/A Tri Counties Bank $ 780,320 14.97 % $ 547,156 10.50 % $ 521,101 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 727,879 13.96 % $ 443,094 8.50 % N/A N/A Tri Counties Bank $ 714,811 13.72 % $ 442,936 8.50 % $ 416,881 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 671,975 12.89 % $ 364,901 7.00 % N/A N/A Tri Counties Bank $ 714,811 13.72 % $ 364,771 7.00 % $ 338,716 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 727,879 9.93 % $ 293,138 4.00 % N/A N/A Tri Counties Bank $ 714,811 9.76 % $ 292,949 4.00 % $ 366,186 5.00 % As of September 30, 2021 and December 31, 2020, capital levels at the Company and the Bank exceed all capital adequacy requirements under the Basel III Capital Rules. Also, at September 30, 2021 and December 31, 2020, the Bank’s capital levels exceeded the minimum amounts necessary to be considered well capitalized under the current regulatory framework for prompt corrective action. The Basel III Capital Rules require for all banking organizations to maintain a capital conservation buffer above the minimum risk-based capital requirements in order to avoid certain limitations on capital distributions, stock repurchases and discretionary bonus payments to executive officers. The capital conservation buffer is exclusively composed of common equity tier 1 capital, and it applies to each of the risk-based capital ratios but not the leverage ratio. At September 30, 2021, the Company and the Bank are in compliance with the capital conservation buffer requirement.

Pending Merger

Pending Merger	9 Months Ended
	Sep. 30, 2021
Business Combinations [Abstract]
Pending Merger	Pending MergerOn July 27, 2021, the Company entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”) with Valley Republic Bancorp, a California corporation (“Valley”), providing for the merger of Valley with and into the Company, with the Company as the surviving corporation. The Merger Agreement contemplates that immediately after the Merger, Valley Republic Bank, a California state-chartered bank and wholly-owned subsidiary of Valley, will merge with and into Tri Counties Bank, a California state-chartered bank and wholly-owned subsidiary of the Company, with Tri Counties Bank as the surviving bank (the “Bank Merger”). The Merger Agreement was adopted and unanimously approved by the Board of Directors of each of the Company and Valley. As of September 30, 2021, Valley had a total asset size of approximately $1.41 billion. The transaction, subject to customary regulatory approvals as well as approval by a majority of the Valley Shareholders, is expected to close in the coming months.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Description of Business and Basis of Presentation	Description of Business and Basis of Presentation TriCo Bancshares (the “Company” or “we”) is a California corporation organized to act as a bank holding company for Tri Counties Bank (the “Bank”). The Company and the Bank are headquartered in Chico, California. The Bank is a California-chartered bank that is engaged in the general commercial banking business in 31 California counties. The Company has five capital subsidiary business trusts (collectively, the “Capital Trusts”) that issued trust preferred securities, including two organized by the Company and three acquired with the acquisition of North Valley Bancorp. The consolidated financial statements are prepared in accordance with accounting policies generally accepted in the United States of America and general practices in the banking industry. All adjustments necessary for a fair presentation of these consolidated financial statements have been included and are of a normal and recurring nature. The financial statements include the accounts of the Company. All inter-company accounts and transactions have been eliminated in consolidation. For financial reporting purposes, the Company’s investments in the Capital Trusts of $1,741,000 are accounted for under the equity method and, accordingly, are not consolidated and are included in other assets on the consolidated balance sheet. The subordinated debentures issued and guaranteed by the Company and held by the Capital Trusts are reflected as debt on the Company’s consolidated balance sheet.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (the “2020 Annual Report”). The Company believes that the disclosures made are adequate to make the information not misleading.
Segment and Significant Group Concentration of Credit Risk	Segment and Significant Group Concentration of Credit Risk The Company grants agribusiness, commercial, consumer, and residential loans to customers located throughout California. The Company has a diversified loan portfolio within the business segments located in this geographical area. The Company currently classifies all its operation into one business segment that it denotes as community banking.
Geographical Descriptions	Geographical Descriptions For the purpose of describing the geographical location of the Company’s operations, the Company has defined northern California as that area of California north of, and including, Stockton to the east and San Jose to the west; central California as that area of the state south of Stockton and San Jose, to and including, Bakersfield to the east and San Luis Obispo to the west; and southern California as that area of the state south of Bakersfield and San Luis Obispo.
Reclassification	Reclassification Some items in the prior year consolidated financial statements were reclassified to conform to the current presentation. Reclassifications had no effect on prior year net income or shareholders’ equity.
Cash and Cash Equivalents	Cash and Cash Equivalents Net cash flows are reported for loan and deposit transactions and other borrowings. For purposes of the consolidated statement of cash flows, cash, due from banks with original maturities less than 90 days, interest-earning deposits in other banks, and Federal funds sold are considered to be cash equivalents.
Allowance for Credit Losses - Securities	Allowance for Credit Losses - Securities The Company measures expected credit losses on held-to-maturity debt securities on a collective basis by major security type, then further
Loans	Loans Loans that management has the intent and ability to hold until maturity or payoff are reported at principle amount outstanding, net of deferred loan fees and costs. Loans are placed in nonaccrual status when reasonable doubt exists as to the full, timely collection of interest or principal, or a loan becomes contractually past due by 90 days or more with respect to interest or principal and is not well secured and in the process of collection. When a loan is placed on nonaccrual status, all interest previously accrued but not collected is reversed against interest income. Income on such loans is then recognized only to the extent that cash is received and where the future collection of principal is considered probable. Interest accruals are resumed on such loans only when they are brought fully current with respect to interest and principal and when, in the judgment of Management, the loan is estimated to be fully collectible as to both principal and interest. Accrued interest receivable is not included in the calculation of the allowance for credit losses.
Allowance for Credit Losses - Loans	Allowance for Credit Losses - Loans The allowance for credit losses (ACL) is a valuation account that is deducted from the loan's amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the allowance when management believes the recorded loan balance is confirmed as uncollectible. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Regardless of the determination that a charge-off is appropriate for financial accounting purposes, the Company manages its loan portfolio by continually monitoring, where possible, a borrower's ability to pay through the collection of financial information, delinquency status, borrower discussion and the encouragement to repay in accordance with the original contract or modified terms, if appropriate. Management estimates the allowance balance using relevant information, from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist. Historical credit loss experience provides the basis for the estimation of expected credit losses, which captures loan balances as of a point in time to form a cohort, then tracks the respective losses generated by that cohort of loans over the remaining life. The Company identified and accumulated loan cohort historical loss data beginning with the fourth quarter of 2008 and through the current period. In situations where the Company's actual loss history was not statistically relevant, the loss history of peers, defined as financial institutions with assets greater than three billion and less than ten billion, were utilized to create a minimum loss rate. Adjustments to historical loss information are made for differences in relevant current loan-specific risk characteristics, such as historical timing of losses relative to the loan origination. In its loss forecasting framework, the Company incorporates forward-looking information through the use of macroeconomic scenarios applied over the forecasted life of the assets. These macroeconomic scenarios incorporate variables that have historically been key drivers of increases and decreases in credit losses. These variables include, but are not limited to changes in environmental conditions, such as California unemployment rates, household debt levels and U.S. gross domestic product. A loan is considered to be collateral dependent when repayment is expected to be provided substantially through the operation or sale of the collateral. The ACL on collateral dependent loans is measured using the fair value of the underlying collateral, adjusted for costs to sell when applicable, less the amortized cost basis of the financial asset. If the value of underlying collateral is determined to be less than the recorded amount of the loan, a charge-off will be taken. Loans for which the terms have been modified resulting in a concession, and for which the borrower is experiencing financial difficulties, is considered to be a troubled debt restructuring (TDR). The ACL on a TDR is measured using the same method as all other portfolio loans, except when the value of a concession cannot be measured using a method other than the discounted cash flow method. When the value of a concession is measured using the discounted cash flow method, the ACL is determined by discounting the expected future cash flows at the original interest rate of the loan. The Company has identified the following portfolio segments to evaluate and measure the allowance for credit loss: Commercial real estate : Commercial real estate - Non-owner occupied: These commercial properties typically consist of buildings which are leased to others for their use and rely on rents as the primary source of repayment. Property types are predominantly office, retail, or light industrial but the portfolio also has some special use properties. As such, the risk of loss associated with these properties is primarily driven by general economic changes or changes in regional economies and the impact of such on a tenant’s ability to pay. Ultimately this can affect occupancy, rental rates, or both. Additional risk of loss can come from new construction resulting in oversupply, the costs to hold or operate the property, or changes in interest rates. The terms on these loans at origination typically have maturities from five fifteen Commercial real estate - Owner occupied: These credits are primarily susceptible to changes in the financial condition of the business operated by the property owner. This may be driven by changes in, among other things, industry challenges, factors unique to the operating geography of the borrower, change in the individual fortunes of the business owner, general economic conditions and changes in business cycles. When default is driven by issues related specifically to the business owner, collateral values tend to provide better repayment support and may result in little or no loss. Alternatively, when default is driven more by general economic conditions, the underlying collateral may have devalued more and thus result in larger losses in the event of default. The terms on these loans at origination typically have maturities from five fifteen Multifamily: These commercial properties are generally comprised of more than four rentable units, such as apartment buildings, with each unit intended to be occupied as the primary residence for one or more persons. Multifamily properties are also subject to changes in general or regional economic conditions, such as unemployment, ultimately resulting in increased vacancy rates or reduced rents or both. In addition, new construction can create an oversupply condition and market competition resulting in increased vacancy, reduced market rents, or both. Due to the nature of their use and the greater likelihood of tenant turnover, the management of these properties is more intensive and therefore is more critical to the preclusion of loss. Farmland: While the Company has few loans that were originated for the purpose of the acquisition of these commercial properties, loans secured by farmland represent unique risks that are associated with the operation of an agricultural businesses. The valuation of farmland can vary greatly over time based on the property's access to resources including but not limited to water, crop prices, foreign exchange rates, government regulation or restrictions, and the nature of ongoing capital investment needed to maintain the quality of the property. Loans secured by farmland typically represent less risk to the Company than other agriculture loans as the real estate typically provides greater support in the event of default or need for longer term repayment. Consumer loans : SFR 1-4 1st DT Liens: The most significant drivers of potential loss within the Company's residential real estate portfolio relate general, regional, or individual changes in economic conditions and their effect on employment and borrowers cash flow. Risk in this portfolio is best measured by changes in borrower credit score and loan-to-value. Loss estimates are based on the general movement in credit score, economic outlook and its effects on employment and the value of homes and the Bank’s historical loss experience adjusted to reflect the economic outlook and the unemployment rate. SFR HELOCs and Junior Liens: Similar to residential real estate term loans, HELOCs and junior liens performance is also primarily driven by borrower cash flows based on employment status. However, HELOCs carry additional risks associated with the fact that most of these loans are secured by a deed of trust in a position that is junior to the primary lien holder. Furthermore, the risk that as the borrower's financial strength deteriorates, the outstanding balance on these credit lines may increase as they may only be canceled by the Company if certain limited criteria are met. In addition to the allowance for credit losses maintained as a percent of the outstanding loan balance, the Company maintains additional reserves for the unfunded portion of the HELOC. Other: The majority of consumer loans are secured by automobiles, with the remainder primarily unsecured revolving debt (credit cards). These loans are susceptible to three primary risks; non-payment due to income loss, over-extension of credit and, when the borrower is unable to pay, shortfall in collateral value, if any. Typically non-payment is due to loss of job and will follow general economic trends in the marketplace driven primarily by rises in the unemployment rate. Loss of collateral value can be due to market demand shifts, damage to collateral itself or a combination of those factors. Credit card loans are unsecured and while collection efforts are pursued in the event of default, there is typically limited opportunity for recovery. Loss estimates are based on the general movement in credit score, economic outlook and its effects on employment and the Bank’s historical loss experience adjusted to reflect the economic outlook and the unemployment rate. Commercial and Industrial: Repayment of these loans is primarily based on the cash flow of the borrower, and secondarily on the underlying collateral provided by the borrower. A borrower's cash flow may be unpredictable, and collateral securing these loans may fluctuate in value. Most often, collateral includes accounts receivable, inventory, or equipment. Collateral securing these loans may depreciate over time, may be difficult to appraise, may be illiquid and may fluctuate in value based on the success of the business. Actual and forecast changes in gross domestic product are believed to be corollary to losses associated with these credits. Construction : While secured by real estate, construction loans represent a greater level of risk than term real estate loans due to the nature of the additional risks associated with the not only the completion of construction within an estimated time period and budget, but also the need to either sell the building or reach a level of stabilized occupancy sufficient to generate the cash flows necessary to support debt service and operating costs. The Company seeks to mitigate the additional risks associated with construction lending by requiring borrowers to comply with lower loan to value ratios and additional covenants as well as strong tertiary support of guarantors. The loss forecasting model applies the historical rate of loss for similar loans over the expected life of the asset as adjusted for macroeconomic factors. Agriculture Production: Repayment of agricultural loans is dependent upon successful operation of the agricultural business, which is greatly impacted by factors outside the control of the borrower. These factors include adverse weather conditions, including access to water, that may impact crop yields, loss of livestock due to disease or other factors, declines in market prices for agriculture products, changes in foreign exchange, and the impact of government regulations. In addition, many farms are dependent on a limited number of key individuals whose injury or death may significantly affect the successful operation of the business. Consequently, agricultural production loans may involve a greater degree of risk than other types of loans. Leases: The loss forecasting model applies the historical rate of loss for similar loans over the expected life of the asset. Leases typically represent an elevated level of credit risk as compared to loans secured by real estate as the collateral for leases is often subject to a more rapid rate of depreciation or depletion. The ultimate severity of loss is impacted by the type of collateral securing the exposure, the size of the exposure, the borrower’s industry sector, any guarantors and the geographic market. Assumptions of expected loss are conditioned to the economic outlook and the other variables discussed above. Unfunded commitments : The estimated credit losses associated with these unfunded lending commitments is calculated using the same models and methodologies noted above and incorporate utilization assumptions at time of default. The reserve for unfunded commitments is maintained on the consolidated balance sheet in other liabilities.
Accounting Standards Adopted in 2021 and Pending Adoption	Accounting Standards Adopted in 2021 On January 1, 2021, the Company adopted ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. This ASU simplified the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The guidance also promoted consistent application and simplification of GAAP for other areas of Topic 740 by clarifying and amending existing guidance. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) was enacted in response to the Coronavirus Disease 2019 (COVID-19) pandemic. The CARES Act provides optional temporary relief from troubled debt restructuring and impairment accounting requirements for loan modifications related to the COVID-19 pandemic made during the period from March 1, 2020 to the earlier of December 31, 2020 or 60 days after the national emergency concerning COVID-19 declared by the President terminates. The applicable period for this relief was extended through 2021 by way of the Consolidated Appropriations Act. Following the passage of the CARES Act legislation, the "Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus" was issued by federal bank regulators, which similarly offers temporary relief from troubled debt restructuring accounting for loan payment deferrals for certain customers whose businesses are experiencing economic hardship due to Coronavirus. The Interagency Statement requires the modification event to be short-term and COVID-19 related, requiring the borrower be not more than 30 days past due as of the date the modification program was implemented, and allowing Management to apply judgement as when the modification program terminates. The ability to suspend TDR accounting under either program does not apply to any adverse impact on the credit of a borrower that is not related to the COVID-19 pandemic. Accounting Standards Pending Adoption FASB issued ASU 2021-06, Presentation of Financial Statements (Topic 205), Financial Services—Depository and Lending (Topic 942), and Financial Services—Investment Companies (Topic 946): Amendments to SEC Paragraphs Pursuant to SEC Final Rule Releases No. 33-10786, Amendments to Financial Disclosures about Acquired and Disposed Businesses, and No. 33-10835, Update of Statistical Disclosures for Bank and Savings and Loan Registrants. This ASU updates certain GAAP annual and interim disclosure requirements to conform with SEC disclosure updates to Guide 3 "Statistical Disclosure by Bank Holding Companies.” Amendments in this ASU are effective for the Company's annual disclosures for fiscal years ending December 31, 2021. The Company's existing annual disclosure report (10-K) largely complies with the impacted updates to Guide 3 requirements, and management expects the impact from adoption to be limited to: certain deposit related disclosures, and reducing certain comparative disclosures from five years to three years, all within Management's Discussion and Analysis section of the 10-K. FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This ASU provides temporary optional guidance to ease the potential burden in accounting for reference rate reform by providing optional expedients and exceptions for applying generally accepted accounting principles (GAAP) to contracts, hedging relationships, and other transactions affected if certain criteria are met. The amendments in this Update apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The election to apply the optional relief for existing fair value and cash flow hedge accounting relationships may be made on a hedge-by-hedge basis and across multiple reporting periods. Amendments in this ASU are effective for the Company through December 31, 2022. As the Company has an insignificant number of instruments that are applicable to this ASU, management has determined that no impact to the valuations of these instruments are applicable for financial reporting purposes.

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Estimated Fair Values of Investments Securities	The amortized cost, estimated fair values and allowance for credit losses of investments in debt securities are summarized in the following tables: September 30, 2021 (in thousands) Amortized Gross Gross Allowance for Credit Losses Estimated Debt Securities Available for Sale Obligations of U.S. government agencies $ 1,241,676 $ 11,001 $ (8,061) $ — $ 1,244,616 Obligations of states and political subdivisions 164,043 5,360 (1,296) — 168,107 Corporate bonds 6,738 58 — — 6,796 Asset backed securities 675,430 3,119 (2,247) — 676,302 Total debt securities available for sale $ 2,087,887 $ 19,538 $ (11,604) $ — $ 2,095,821 Debt Securities Held to Maturity Obligations of U.S. government agencies $ 208,127 $ 10,910 $ — $ — $ 219,037 Obligations of states and political subdivisions 8,852 285 — — 9,137 Total debt securities held to maturity $ 216,979 $ 11,195 $ — $ — $ 228,174 December 31, 2020 (in thousands) Amortized Gross Gross Allowance for Credit Losses Estimated Debt Securities Available for Sale Obligations of U.S. government agencies $ 795,555 $ 17,710 $ (891) $ — $ 812,374 Obligations of states and political subdivisions 123,347 5,748 — — 129,095 Corporate bonds 2,459 85 — — 2,544 Asset backed securities 473,720 1,682 (5,151) — 470,251 Total debt securities available for sale $ 1,395,081 $ 25,225 $ (6,042) $ — $ 1,414,264 Debt Securities Held to Maturity Obligations of U.S. government agencies 273,667 13,774 — $ — 287,441 Obligations of states and political subdivisions 10,896 389 — — 11,285 Total debt securities held to maturity $ 284,563 $ 14,163 $ — $ — $ 298,726
Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity	As of September 30, 2021, the contractual final maturity for available for sale and held to maturity investment securities is as follows: Debt Securities Available for Sale Held to Maturity (in thousands) Amortized Estimated Amortized Estimated Due in one year $ 8,771 $ 8,872 $ — $ — Due after one year through five years 154,411 154,531 1,020 1,129 Due after five years through ten years 337,783 339,617 22,548 23,346 Due after ten years 1,586,922 1,592,801 193,411 203,699 Totals $ 2,087,887 $ 2,095,821 $ 216,979 $ 228,174
Gross Unrealized Losses on Investment Securities	Gross unrealized losses on debt securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, were as follows: September 30, 2021: Less than 12 months 12 months or more Total (in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Debt Securities Available for Sale Obligations of U.S. government agencies $ 778,650 $ (7,907) $ 11,463 $ (154) $ 790,113 $ (8,061) Obligations of states and political subdivisions 62,820 (1,296) — — 62,820 (1,296) Asset backed securities 232,417 (1,325) 129,656 (922) 362,073 (2,247) Total debt securities available for sale $ 1,073,887 $ (10,528) $ 141,119 $ (1,076) $ 1,215,006 $ (11,604) December 31, 2020: Less than 12 months 12 months or more Total (in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Debt Securities Available for Sale Obligations of U.S. government agencies $ 160,543 $ (891) $ — $ — $ 160,543 $ (891) Asset backed securities 51,544 (441) 297,020 (4,710) 348,564 (5,151) Total debt securities available for sale $ 212,087 $ (1,332) $ 297,020 $ (4,710) $ 509,107 $ (6,042)
Amortized Cost of Debt Securities Held-to-Maturity	The following table summarizes the amortized cost of debt securities held-to-maturity at the dates indicated, aggregated by credit quality indicator: September 30, 2021 December 31, 2020 AAA/AA/A BBB/BB/B AAA/AA/A BBB/BB/B (In thousands) (In thousands) Debt Securities Held to Maturity Obligations of U.S. government agencies $ 208,127 $ — $ 273,667 $ — Obligations of states and political subdivisions 8,852 — 10,896 — Total debt securities held to maturity $ 216,979 $ — $ 284,563 $ —

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Summary of Loan Balances	A summary of loan balances follows: (in thousands) September 30, 2021 December 31, 2020 Commercial real estate: CRE non-owner occupied $ 1,526,030 $ 1,535,555 CRE owner occupied 701,041 624,375 Multifamily 829,644 639,480 Farmland 166,022 152,492 Total commercial real estate loans 3,222,737 2,951,902 Consumer: SFR 1-4 1st DT liens 662,343 546,592 SFR HELOCs and junior liens 323,258 327,484 Other 68,052 78,032 Total consumer loans 1,053,653 952,108 Commercial and industrial 345,027 526,327 Construction 216,680 284,842 Agriculture production 44,410 44,164 Leases 4,989 3,784 Total loans, net of deferred loan fees and discounts $ 4,887,496 $ 4,763,127 Total principal balance of loans owed, net of charge-offs $ 4,928,842 $ 4,805,596 Unamortized net deferred loan fees (17,218) (16,984) Discounts to principal balance of loans owed, net of charge-offs (17,984) (25,485) Total loans, net of unamortized deferred loan fees and discounts $ 4,893,640 $ 4,763,127 Allowance for credit losses on loans $ (84,306) $ (91,847)

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2021
Allowance For Loan And Lease Losses [Abstract]
Summary of Activity in Allowance for Loan Losses, and Ending Balance of Loans, Net of Unearned Fees for Periods Indicated	For the periods indicated, the following tables summarize the activity in the allowance for credit losses on loans which is recorded as a contra asset, and the reserve for unfunded commitments which is recorded on the balance sheet within other liabilities: Allowance for credit losses – Three months ended September 30, 2021 (in thousands) Beginning Charge-offs Recoveries Provision (benefit) Ending Commercial real estate: CRE non-owner occupied $ 26,028 $ — $ 10 $ (817) $ 25,221 CRE owner occupied 10,463 (18) 793 (508) 10,730 Multifamily 13,196 — — (320) 12,876 Farmland 1,950 (126) — 78 1,902 Total commercial real estate loans 51,637 (144) 803 (1,567) 50,729 Consumer: SFR 1-4 1st DT liens 10,629 (145) 1 133 10,618 SFR HELOCs and junior liens 10,701 — 63 (333) 10,431 Other 2,620 (181) 97 (94) 2,442 Total consumer loans 23,950 (326) 161 (294) 23,491 Commercial and industrial 4,511 (1,112) 355 (327) 3,427 Construction 4,951 — — 577 5,528 Agriculture production 1,007 — 2 110 1,119 Leases 6 — — 6 12 Allowance for credit losses on loans 86,062 (1,582) 1,321 (1,495) 84,306 Reserve for unfunded commitments 3,465 — — 60 3,525 Total $ 89,527 $ (1,582) $ 1,321 $ (1,435) $ 87,831 Allowance for credit losses – Nine months ended September 30, 2021 (in thousands) Beginning Charge-offs Recoveries Provision (benefit) Ending Commercial real estate: CRE non-owner occupied $ 29,380 $ — $ 12 $ (4,171) $ 25,221 CRE owner occupied 10,861 (18) 794 (907) 10,730 Multifamily 11,472 — — 1,404 12,876 Farmland 1,980 (126) — 48 1,902 Total commercial real estate loans 53,693 (144) 806 (3,626) 50,729 Consumer: SFR 1-4 1st DT liens 10,117 (145) 12 634 10,618 SFR HELOCs and junior liens 11,771 — 860 (2,200) 10,431 Other 3,260 (460) 262 (620) 2,442 Total consumer loans 25,148 (605) 1,134 (2,186) 23,491 Commercial and industrial 4,252 (1,446) 570 51 3,427 Construction 7,540 — — (2,012) 5,528 Agriculture production 1,209 — 24 (114) 1,119 Leases 5 — — 7 12 Allowance for credit losses on loans 91,847 (2,195) 2,534 (7,880) 84,306 Reserve for unfunded commitments 3,400 — — 125 3,525 Total $ 95,247 $ (2,195) $ 2,534 $ (7,755) $ 87,831 Allowance for credit losses – Year ended December 31, 2020 (in thousands) Beginning Adoption of CECL Charge-offs Recoveries Provision Ending Balance Commercial real estate: CRE non-owner occupied $ 5,948 $ 6,701 $ — $ 198 $ 16,533 $ 29,380 CRE owner occupied 2,027 2,281 — 28 6,525 10,861 Multifamily 3,352 2,281 — — 5,839 11,472 Farmland 668 585 (182) — 909 1,980 Total commercial real estate loans 11,995 11,848 (182) 226 29,806 53,693 Consumer: SFR 1-4 1st DT liens 2,306 2,675 (13) 416 4,733 10,117 SFR HELOCs and junior liens 6,183 4,638 (116) 304 762 11,771 Other 1,595 971 (670) 347 1,017 3,260 Total consumer loans 10,084 8,284 (799) 1,067 6,512 25,148 Commercial and industrial 4,867 (1,961) (774) 568 1,552 4,252 Construction 3,388 933 — — 3,219 7,540 Agriculture production 261 (179) — 24 1,103 1,209 Leases 21 (12) — — (4) 5 Allowance for credit losses on loans 30,616 18,913 (1,755) 1,885 42,188 91,847 Reserve for unfunded commitments 2,775 — — — 625 3,400 Total $ 33,391 $ 18,913 $ (1,755) $ 1,885 $ 42,813 $ 95,247 Allowance for credit losses – Three months ended September 30, 2020 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Commercial real estate: CRE non-owner occupied $ 26,091 $ — $ 23 $ 2,733 $ 28,847 CRE owner occupied 8,710 — 1 914 9,625 Multifamily 8,581 — — 1,451 10,032 Farmland 1,468 — — 322 1,790 Total commercial real estate loans 44,850 — 24 5,420 50,294 Consumer: SFR 1-4 1st DT liens 8,015 (2) 2 922 8,937 SFR HELOCs and junior liens 12,108 — 126 (558) 11,676 Other 3,042 (98) 85 365 3,394 Total consumer loans 23,165 (100) 213 729 24,007 Commercial and industrial 4,018 (94) 142 468 4,534 Construction 6,775 — — 865 7,640 Agriculture production 919 — 2 172 1,093 Leases 12 — — (5) 7 Allowance for credit losses on loans $ 79,739 $ (194) $ 381 $ 7,649 $ 87,575 Reserve for unfunded commitments 3,000 — — — 3,000 Total $ 82,739 $ (194) $ 381 $ 7,649 $ 90,575 Allowance for credit losses – Nine months ended September 30, 2020 (in thousands) Beginning Adoption of CECL Charge-offs Recoveries Provision Ending Balance Commercial real estate: CRE non-owner occupied $ 5,948 $ 6,701 $ — $ 223 $ 15,975 $ 28,847 CRE owner occupied 2,027 2,281 — 3 5,314 9,625 Multifamily 3,352 2,281 — — 4,399 10,032 Farmland 668 585 — — 537 1,790 Total commercial real estate loans 11,995 11,848 — 226 26,225 50,294 Consumer: SFR 1-4 1st DT liens 2,306 2,675 (13) 414 3,555 8,937 SFR HELOCs and junior liens 6,183 4,638 (23) 265 613 11,676 Other 1,595 971 (471) 253 1,046 3,394 Total consumer loans 10,084 8,284 (507) 932 5,214 24,007 Commercial and industrial 4,867 (1,961) (688) 323 1,993 4,534 Construction 3,388 933 — — 3,319 7,640 Agriculture production 261 (179) — 22 989 1,093 Leases 21 (12) — — (2) 7 Allowance for credit losses on loans 30,616 18,913 (1,195) 1,503 37,738 87,575 Reserve for unfunded commitments 2,775 — — — 225 3,000 Total $ 33,391 $ 18,913 $ (1,195) $ 1,503 $ 37,963 $ 90,575
Schedule Credit Quality Indicators	Based on the most recent analysis performed, the risk category of loans by class of loans is as follows for the period indicated: Term Loans Amortized Cost Basis by Origination Year – As of September 30, 2021 (in thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Commercial real estate: CRE non-owner occupied risk ratings Pass $ 150,987 $ 121,346 $ 199,462 $ 136,871 $ 235,302 $ 552,648 $ 69,077 $ — $ 1,465,693 Special Mention — — 8,422 11,555 4,312 19,770 1,730 — 45,789 Substandard — — — 1,397 564 12,587 — — 14,548 Doubtful/Loss — — — — — — — — — Total CRE non-owner occupied risk ratings $ 150,987 $ 121,346 $ 207,884 $ 149,823 $ 240,178 $ 585,005 $ 70,807 $ — $ 1,526,030 Commercial real estate: CRE owner occupied risk ratings Pass $ 137,277 $ 99,090 $ 66,978 $ 53,684 $ 58,367 $ 232,613 $ 22,114 $ — $ 670,123 Special Mention 16,055 — — 289 759 6,446 — — 23,549 Substandard — — 875 1,243 460 4,791 — — 7,369 Doubtful/Loss — — — — — — — — — Total CRE owner occupied risk ratings $ 153,332 $ 99,090 $ 67,853 $ 55,216 $ 59,586 $ 243,850 $ 22,114 $ — $ 701,041 Commercial real estate: Multifamily risk ratings Pass $ 197,898 $ 105,210 $ 106,446 $ 110,324 $ 88,440 $ 152,383 $ 22,648 $ — $ 783,349 Special Mention — 9,388 — — — 24,664 7,684 — 41,736 Substandard — — 4,397 — — 162 — — 4,559 Doubtful/Loss — — — — — — — — — Total multifamily loans $ 197,898 $ 114,598 $ 110,843 $ 110,324 $ 88,440 $ 177,209 $ 30,332 $ — $ 829,644 Commercial real estate: Farmland risk ratings Pass $ 26,989 $ 18,422 $ 20,922 $ 17,650 $ 7,596 $ 19,726 $ 42,725 $ — $ 154,030 Special Mention — — — — 1,197 2,683 1,558 — 5,438 Substandard — — 2,934 — 584 1,374 1,662 — 6,554 Doubtful/Loss — — — — — — — — — Total farmland loans $ 26,989 $ 18,422 $ 23,856 $ 17,650 $ 9,377 $ 23,783 $ 45,945 $ — $ 166,022 Consumer loans: SFR 1-4 1st DT liens risk ratings Pass $ 224,532 $ 170,331 $ 50,860 $ 35,379 $ 38,529 $ 127,044 $ — $ 3,312 $ 649,987 Special Mention 1,102 — 287 1,149 418 1,754 — 785 5,495 Substandard — — — 1,110 267 4,973 — 511 6,861 Doubtful/Loss — — — — — — — — — Total SFR 1st DT liens $ 225,634 $ 170,331 $ 51,147 $ 37,638 $ 39,214 $ 133,771 $ — $ 4,608 $ 662,343 Term Loans Amortized Cost Basis by Origination Year – As of September 30, 2021 (in thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Consumer loans: SFR HELOCs and Junior Liens Pass $ 591 $ — $ — $ — $ — $ 206 $ 301,235 $ 10,106 $ 312,138 Special Mention — — — — — 86 4,202 719 5,007 Substandard — — — — — 12 4,575 1,526 6,113 Doubtful/Loss — — — — — — — — — Total SFR HELOCs and Junior Liens $ 591 $ — $ — $ — $ — $ 304 $ 310,012 $ 12,351 $ 323,258 Consumer loans: Other risk ratings Pass $ 16,323 $ 17,635 $ 19,492 $ 9,261 $ 2,417 $ 1,187 $ 575 $ — $ 66,890 Special Mention — 49 190 237 105 58 66 — 705 Substandard — 59 85 120 70 110 13 — 457 Doubtful/Loss — — — — — — — — — Total other consumer loans $ 16,323 $ 17,743 $ 19,767 $ 9,618 $ 2,592 $ 1,355 $ 654 $ — $ 68,052 Commercial and industrial loans: Commercial and industrial risk ratings Pass $ 166,972 $ 25,705 $ 30,078 $ 12,775 $ 7,865 $ 8,503 $ 85,476 $ 691 $ 338,065 Special Mention — 2,517 77 357 98 140 95 52 3,336 Substandard — — 158 72 890 555 1,811 140 3,626 Doubtful/Loss — — — — — — — — — Total commercial and industrial loans $ 166,972 $ 28,222 $ 30,313 $ 13,204 $ 8,853 $ 9,198 $ 87,382 $ 883 $ 345,027 Construction loans: Construction risk ratings Pass $ 48,405 $ 80,862 $ 55,870 $ 5,176 $ 1,670 $ 19,048 $ — $ — $ 211,031 Special Mention 4,102 1,087 — — 346 — — — 5,535 Substandard — — — — — 114 — — 114 Doubtful/Loss — — — — — — — — — Total construction loans $ 52,507 $ 81,949 $ 55,870 $ 5,176 $ 2,016 $ 19,162 $ — $ — $ 216,680 Agriculture production loans: Agriculture production risk ratings Pass $ 2,037 $ 945 $ 1,598 $ 1,053 $ 1,091 $ 930 $ 34,526 $ — $ 42,180 Special Mention — — — 163 — 52 1,894 — 2,109 Substandard — — — — — — 121 — 121 Doubtful/Loss — — — — — — — — — Total agriculture production loans $ 2,037 $ 945 $ 1,598 $ 1,216 $ 1,091 $ 982 $ 36,541 $ — $ 44,410 Term Loans Amortized Cost Basis by Origination Year – As of September 30, 2021 (in thousands) 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Leases: Lease risk ratings Pass $ 4,989 $ — $ — $ — $ — $ — $ — $ — $4,989 Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful/Loss — — — — — — — — — Total leases $ 4,989 $ — $ — $ — $ — $ — $ — $ — $ 4,989 Total loans outstanding: Risk ratings Pass $ 977,000 $ 639,546 $ 551,706 $ 382,173 $ 441,277 $ 1,114,288 $ 578,376 $ 14,109 $ 4,698,475 Special Mention 21,259 13,041 8,976 13,750 7,235 55,653 17,229 1,556 138,699 Substandard — 59 8,449 3,942 2,835 24,678 8,182 2,177 50,322 Doubtful/Loss — — — — — — — — — Total loans outstanding $ 998,259 $ 652,646 $ 569,131 $ 399,865 $ 451,347 $ 1,194,619 $ 603,787 $ 17,842 $ 4,887,496 Term Loans Amortized Cost Basis by Origination Year – As of December 31, 2020 (in thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Commercial real estate: CRE non-owner occupied risk ratings Pass $ 120,520 $ 207,899 $ 155,730 $ 256,677 $ 179,523 $ 460,644 $ 76,730 $ — $ 1,457,723 Special Mention — 7,455 11,692 5,407 15,773 18,832 12,205 — 71,364 Substandard — — 1,449 584 2,147 2,288 — — 6,468 Doubtful/Loss — — — — — — — — — Total CRE non-owner occupied risk ratings $ 120,520 $ 215,354 $ 168,871 $ 262,668 $ 197,443 $ 481,764 $ 88,935 $ — $ 1,535,555 Commercial real estate: CRE owner occupied risk ratings Pass $ 105,896 $ 75,144 $ 53,816 $ 58,371 $ 54,541 $ 227,828 $ 25,508 $ — $ 601,104 Special Mention — — 288 7,451 2,955 6,140 — — 16,834 Substandard — 1,533 1,301 475 1,306 1,822 — — 6,437 Doubtful/Loss — — — — — — — — — Total CRE owner occupied risk ratings $ 105,896 $ 76,677 $ 55,405 $ 66,297 $ 58,802 $ 235,790 $ 25,508 $ — $ 624,375 Commercial real estate: Multifamily risk ratings Pass $ 77,646 $ 118,725 $ 113,882 $ 70,112 $ 67,457 $ 123,518 $ 19,007 $ — $ 590,347 Special Mention 9,441 — — 603 24,687 772 9,259 — 44,762 Substandard — 4,371 — — — — — — — 4,371 Doubtful/Loss — — — — — — — — — Total multifamily loans $ 87,087 $ 123,096 $ 113,882 $ 70,715 $ 92,144 $ 124,290 $ 28,266 $ — $ 639,480 Term Loans Amortized Cost Basis by Origination Year – As of December 31, 2020 (in thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Commercial real estate: Farmland risk ratings Pass $ 17,640 $ 25,003 $ 19,148 $ 12,834 $ 7,377 $ 17,129 $ 39,411 $ — $ 138,542 Special Mention — 2,567 — 1,271 227 3,107 2,258 — 9,430 Substandard — 700 — 602 — 1,214 2,004 — 4,520 Doubtful/Loss — — — — — — — — — Total farmland loans $ 17,640 $ 28,270 $ 19,148 $ 14,707 $ 7,604 $ 21,450 $ 43,673 $ — $ 152,492 Consumer loans: SFR 1-4 1st DT liens risk ratings Pass $ 183,719 $ 80,717 $ 36,342 $ 53,001 $ 46,467 $ 126,465 $ 76 $ 5,507 $ 532,294 Special Mention — 290 684 110 15 2,936 — 934 4,969 Substandard — — 1,174 929 935 5,763 — 528 9,329 Doubtful/Loss — — — — — — — — — Total SFR 1st DT liens $ 183,719 $ 81,007 $ 38,200 $ 54,040 $ 47,417 $ 135,164 $ 76 $ 6,969 $ 546,592 Consumer loans: SFR HELOCs and Junior Liens Pass $ 793 $ — $ 13 $ 360 $ 300 $ 910 $ 297,160 $ 14,051 $ 313,587 Special Mention — — 16 — — 83 4,504 789 5,392 Substandard — — — — — 39 6,698 1,768 8,505 Doubtful/Loss — — — — — — — — — Total SFR HELOCs and Junior Liens $ 793 $ — $ 29 $ 360 $ 300 $ 1,032 $ 308,362 $ 16,608 $ 327,484 Consumer loans: Other risk ratings Pass $ 25,876 $ 29,539 $ 14,170 $ 4,238 $ 1,020 $ 967 $ 986 $ — $ 76,796 Special Mention 43 208 147 74 24 65 90 — 651 Substandard 58 82 210 74 12 140 9 — 585 Doubtful/Loss — — — — — — — — — Total other consumer loans $ 25,977 $ 29,829 $ 14,527 $ 4,386 $ 1,056 $ 1,172 $ 1,085 $ — $ 78,032 Commercial and industrial loans: Commercial and industrial risk ratings Pass $ 356,701 $ 48,838 $ 20,463 $ 13,151 $ 5,185 $ 9,490 $ 65,938 $ 1,085 $ 520,851 Special Mention — 102 698 195 20 178 207 11 1,411 Substandard — 301 53 1,142 823 148 1,519 79 4,065 Doubtful/Loss — — — — — — — — — Total commercial and industrial loans $ 356,701 $ 49,241 $ 21,214 $ 14,488 $ 6,028 $ 9,816 $ 67,664 $ 1,175 $ 526,327 Term Loans Amortized Cost Basis by Origination Year – As of December 31, 2020 (in thousands) 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Construction loans: Construction risk ratings Pass 69,133 41,786 92,191 51,082 20,868 2,876 — $ — $ 277,936 Special Mention — — — 346 — 1,780 — — 2,126 Substandard — — — — 4,529 251 — — 4,780 Doubtful/Loss — — — — — — — — — Total construction loans $ 69,133 $ 41,786 $ 92,191 $ 51,428 $ 25,397 $ 4,907 $ — $ — $ 284,842 Agriculture production loans: Agriculture production risk ratings Pass $ 977 $ 2,079 $ 1,590 $ 1,838 $ 663 $ 708 $ 36,051 $ — $ 43,906 Special Mention — — 203 — 49 — — — 252 Substandard — — — — 6 — — — 6 Doubtful/Loss — — — — — — — — — Total agriculture production loans $ 977 $ 2,079 $ 1,793 $ 1,838 $ 718 $ 708 $ 36,051 $ — $ 44,164 Leases: Lease risk ratings Pass $ 3,784 $ — $ — $ — $ — $ — $ — $ — $ 3,784 Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful/Loss — — — — — — — — — Total leases $ 3,784 $ — $ — $ — $ — $ — $ — $ — $ 3,784 Total loans outstanding: Risk ratings Pass $ 962,685 $ 629,730 $ 507,345 $ 521,664 $ 383,401 $ 970,535 $ 560,867 $ 20,643 $ 4,556,870 Special Mention 9,484 10,622 13,728 15,457 43,750 33,893 28,523 1,734 157,191 Substandard 58 6,987 4,187 3,806 9,758 11,665 10,230 2,375 49,066 Doubtful/Loss — — — — — — — — — Total loans outstanding $ 972,227 $ 647,339 $ 525,260 $ 540,927 $ 436,909 $ 1,016,093 $ 599,620 $ 24,752 $ 4,763,127
Analysis of Past Due Loans	The following table shows the ending balance of current and past due originated loans by loan category as of the date indicated: Analysis of Past Due Loans - As of September 30, 2021 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total Commercial real estate: CRE non-owner occupied $ 810 $ — $ 120 $ 930 $ 1,525,100 $ 1,526,030 CRE owner occupied 193 — — 193 700,848 701,041 Multifamily 4,729 4,729 824,915 829,644 Farmland — 50 575 625 165,397 166,022 Total commercial real estate loans 5,732 50 695 6,477 3,216,260 3,222,737 Consumer: SFR 1-4 1st DT liens 24 163 216 403 661,940 662,343 SFR HELOCs and junior liens 1,220 205 1,416 2,841 320,417 323,258 Other 23 35 25 83 67,969 68,052 Total consumer loans 1,267 403 1,657 3,327 1,050,326 1,053,653 Commercial and industrial 377 63 127 567 344,460 345,027 Construction — — — — 216,680 216,680 Agriculture production 49 — 119 168 44,242 44,410 Leases — — — — 4,989 4,989 Total $ 7,425 $ 516 $ 2,598 $ 10,539 $ 4,876,957 $ 4,887,496 Analysis of Past Due Loans - As of December 31, 2020 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total Commercial real estate: CRE non-owner occupied $ 127 $ 173 $ 239 $ 539 $ 1,535,016 $ 1,535,555 CRE owner occupied 297 824 1,121 623,254 624,375 Multifamily — — — — 639,480 639,480 Farmland 899 — 70 969 151,523 152,492 Total commercial real estate loans 1,323 173 1,133 2,629 2,949,273 2,951,902 Consumer: SFR 1-4 1st DT liens 37 — 960 997 545,595 546,592 SFR HELOCs and junior liens 418 212 1,671 2,301 325,183 327,484 Other 41 13 100 154 77,878 78,032 Total consumer loans 496 225 2,731 3,452 948,656 952,108 Commercial and industrial 155 426 105 686 525,641 526,327 Construction — — — — 284,842 284,842 Agriculture production — — — — 44,164 44,164 Leases — — — — 3,784 3,784 Total $ 1,974 $ 824 $ 3,969 $ 6,767 $ 4,756,360 $ 4,763,127
Schedule of Non Accrual Loans	The following table shows the ending balance of non accrual loans by loan category as of the date indicated: Non Accrual Loans As of September 30, 2021 As of December 31, 2020 (in thousands) Non accrual with no allowance for credit losses Total non accrual Past due 90 days or more and still accruing Non accrual with no allowance for credit losses Total non accrual Past due 90 days or more and still accruing Commercial real estate: CRE non-owner occupied $ 12,591 $ 7,713 $ — $ 3,110 $ 3,110 $ — CRE owner occupied — 4,877 — 3,111 4,061 — Multifamily 4,560 4,560 — — — — Farmland 1,147 1,147 — 1,468 1,538 — Total commercial real estate loans 18,298 18,297 — 7,689 8,709 — Consumer: SFR 1-4 1st DT liens 3,831 3,833 — 4,950 5,093 — SFR HELOCs and junior liens 3,282 4,034 — 4,480 6,148 — Other 52 84 — 68 167 — Total consumer loans 7,165 7,951 — 9,498 11,408 — Commercial and industrial 1,339 2,407 — 652 2,183 — Construction 15 15 — 4,546 4,546 — Agriculture production — 120 — 5 18 — Leases — — — — — — Sub-total 26,817 28,790 — 22,390 26,864 — Less: Guaranteed loans (679) (775) — (687) (811) Total, net $ 26,138 $ 28,015 $ — $ 21,703 $ 26,053 $ —
Amortized Cost Basis of Collateral Dependent Loans, By Class of Loan	The following tables present the amortized cost basis of collateral dependent loans by class of loans as of the following periods: As of September 30, 2021 (in thousands) Retail Office Warehouse Other Multifamily Farmland SFR -1st Deed SFR -2nd Deed Automobile/Truck A/R and Inventory Equipment Total Commercial real estate: CRE non-owner occupied $ 2,858 $ 1,285 $ 1,583 $ 6,865 $ — $ — $ — $ — $ — $ — $ — $ 12,591 CRE owner occupied — — — — — — — — — — — — Multifamily — — — — 4,560 — — — — — — 4,560 Farmland — — — — — 1,147 — — — — — 1,147 Total commercial real estate loans 2,858 1,285 1,583 6,865 4,560 1,147 — — — — — 18,298 Consumer: SFR 1-4 1st DT liens — — — — — — 3,830 — — — — 3,830 SFR HELOCs and junior liens — — — — — — 1,574 1,848 — — — 3,422 Other — — — 44 — — — — 18 — 12 74 Total consumer loans — — — 44 — — 5,404 1,848 18 — 12 7,326 Commercial and industrial — — — — — — — — — 2,231 130 2,361 Construction — — — — — — 16 — — — — 16 Agriculture production — — — 120 — — — — — — — 120 Leases — — — — — — — — — — — — Total $ 2,858 $ 1,285 $ 1,583 $ 7,029 $ 4,560 $ 1,147 $ 5,420 $ 1,848 $ 18 $ 2,231 $ 142 $ 28,121 As of December 31, 2020 (in thousands) Retail Office Warehouse Other Multifamily Farmland SFR -1st Deed SFR -2nd Deed Automobile/Truck A/R and Inventory Equipment Total Commercial real estate: CRE non-owner occupied $ 2,445 $ 435 $ — $ — $ — $ — $ — $ — $ — $ — $ — $ 2,880 CRE owner occupied 796 1,176 1,668 — — — — — — — — 3,640 Multifamily — — — — — — — — — — — — Farmland — — — — — — 1,538 — — — — — 1,538 Total commercial real estate loans 3,241 1,611 1,668 — — 1,538 — — — — — 8,058 Consumer: SFR 1-4 1st DT liens — — — — — — 5,068 — — — — 5,068 SFR HELOCs and junior liens — — — — — — 1,855 2,839 — — — 4,694 Other — — — 42 — — — — 97 — — 139 Total consumer loans — — — 42 — — 6,923 2,839 97 — — 9,901 Commercial and industrial — — — 292 — — — — — 1,173 75 1,540 Construction — — — — — — 4,546 — — — — 4,546 Agriculture production — — — — — — — — — 13 5 18 Leases — — — — — — — — — — — — Total $ 3,241 $ 1,611 $ 1,668 $ 334 $ — $ 1,538 $ 11,469 $ 2,839 $ 97 $ 1,186 $ 80 $ 24,063
Troubled Debt Restructurings	The following tables show certain information regarding TDRs that occurred during the periods indicated: TDR information for the three months ended September 30, 2021 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Commercial real estate: CRE non-owner occupied 3 $ 3,943 $ 3,938 $ — — $ — $ — CRE owner occupied — — — — — — — Multifamily — — — — — — — Farmland 1 50 50 50 — — — Total commercial real estate loans 4 3,993 3,988 50 — — — Consumer: SFR 1-4 1st DT liens — — — — — — — SFR HELOCs and junior liens — — — — — — — Other — — — — — — — Total consumer loans — — — — — — — Commercial and industrial 2 160 159 106 1 13 (5) Construction — — — — — — — Agriculture production — — — — — — — Leases — — — — — — — Total 6 $ 4,153 $ 4,147 $ 156 1 $ 13 $ (5) TDR information for the three months ended September 30, 2020 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Commercial real estate: CRE non-owner occupied 1 $ 319 $ 314 $ 314 1 $ 141 $ — CRE owner occupied 5 2,422 2,341 67 2 1,401 — Multifamily — — — — — — — Farmland — — — — — — — Total commercial real estate loans 6 2,741 2,655 381 3 1,542 — Consumer: SFR 1-4 1st DT liens — — — — — — — SFR HELOCs and junior liens — — — — 1 143 — Other — — — — — — — Total consumer loans — — — — 1 143 — Commercial and industrial — — — — — — — Construction — — — — — — — Agriculture production — — — — — — — Leases — — — — — — — Total 6 $ 2,741 $ 2,655 $ 381 $ 4 $ 1,685 $ — TDR Information for the nine months ended September 30, 2021 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Commercial real estate: CRE non-owner occupied 5 $ 4,966 $ 4,956 $ 1,020 — $ — $ — CRE owner occupied 1 740 742 742 — — — Multifamily — — — — — — — Farmland 1 50 50 50 3 847 — Total commercial real estate loans 7 5,756 5,748 1,812 3 847 — Consumer: SFR 1-4 1st DT liens — — — — — — — SFR HELOCs and junior liens — — — — — — — Other — — — — — — — Total consumer loans — — — — — — — Commercial and industrial 7 2,476 2,469 709 2 260 (5) Construction — — — — — — — Agriculture production — — — — — — — Leases — — — — — — — Total 14 $ 8,232 $ 8,217 $ 2,521 5 $ 1,107 $ (5) TDR Information for the nine months ended September 30, 2020 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Commercial real estate: CRE non-owner occupied 2 $ 576 $ 565 $ 314 1 $ 141 $ — CRE owner occupied 5 2,422 2,341 67 2 1,401 — Multifamily — — — — — — — Farmland 2 229 298 — — — — Total commercial real estate loans 9 3,227 3,204 381 3 1,542 — Consumer: SFR 1-4 1st DT liens — — — — 2 1,037 — SFR HELOCs and junior liens 2 172 169 — — — — Other — — — — — — — Total consumer loans 2 172 169 — 2 1,037 — Commercial and industrial — — — — — — — Construction 1 21 20 21 — — — Agriculture production — — — — — — — Leases — — — — — — — Total 12 $ 3,420 $ 3,393 $ 402 5 $ 2,579 $ —

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Components of Lease Expense	The following table presents the components of lease expense for the periods ended: Three months ended September 30, Nine months ended September 30, (in thousands) 2021 2020 2021 2020 Operating lease cost $ 1,328 $ 1,284 $ 3,854 $ 3,869 Short-term lease cost 57 67 180 195 Variable lease cost 8 (1) 5 6 Sublease income — (33) (24) (102) Total lease cost $ 1,393 $ 1,317 $ 4,015 $ 3,968
Supplemental Cash Flow Information Related to Leases	The following table presents supplemental cash flow information related to leases for the periods ended: Three months ended September 30, Nine months ended September 30, (in thousands) 2021 2020 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 1,261 $ 1,236 $ 3,690 $ 3,716 ROUA obtained in exchange for operating lease liabilities $ 1,575 $ 93 $ 2,883 $ 4,161
Weighted Average Operating Lease Term And Discount Rate	The following table presents the weighted average operating lease term and discount rate as of the period ended: September 30, 2021 2020 Weighted-average remaining lease term (years) 9.3 10.0 Weighted-average discount rate 2.92 % 3.10 %
Future Expected Operating Lease Payments	At September 30, 2021, future expected operating lease payments are as follows: (in thousands) Periods ending December 31, 2021 $ 1,215 2022 4,714 2023 4,071 2024 3,716 2025 3,132 Thereafter 15,057 31,905 Discount for present value of expected cash flows (4,615) Lease liability at September 30, 2021 $ 27,290

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2021
Deposits [Abstract]
Summary of Balances of Deposits	A summary of the balances of deposits follows: (in thousands) September 30, December 31, Noninterest-bearing demand $ 2,943,016 $ 2,581,517 Interest-bearing demand 1,519,426 1,414,908 Savings 2,447,706 2,164,942 Time certificates, $250,000 or more 58,503 73,147 Other time certificates 268,171 271,420 Total deposits $ 7,236,822 $ 6,505,934

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Summary of Bank's Commitments and Contingent Liabilities	The following table presents a summary of the Bank’s commitments and contingent liabilities: (in thousands) September 30, December 31, Financial instruments whose amounts represent risk: Commitments to extend credit: Commercial loans $ 405,112 $ 462,422 Consumer loans 595,148 534,223 Real estate mortgage loans 321,745 202,306 Real estate construction loans 209,407 227,876 Standby letters of credit 23,207 15,056 Deposit account overdraft privilege 111,980 110,813

Stock Options and Other Equit_2

Stock Options and Other Equity-Based Incentive Instruments (Tables)	9 Months Ended
	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Stock Option Activity	Stock option activity during the nine months ended September 30, 2021 is summarized in the following table: Number Weighted Outstanding at December 31, 2020 128,500 $ 17.72 Options granted — — Options exercised (5,675) 15.20 Options forfeited — — Outstanding at September 30, 2021 122,825 $ 17.80
Summary of Options Outstanding	The following table shows the number, weighted-average exercise price, intrinsic value, and weighted average remaining contractual life of options exercisable, options not yet exercisable and total options outstanding as of September 30, 2021: Currently Currently Not Total Number of options 122,825 — 122,825 Weighted average exercise price $ 17.80 $ — $ 17.80 Intrinsic value (in thousands) $ 3,144 $ — $ 3,144 Weighted average remaining contractual term (yrs.) 1.3 0.0 1.5
Restricted Stock Unit (RSU) Activity	Activity related to restricted stock unit awards during the nine months ended September 30, 2021 is summarized in the following table: Service Market Plus Outstanding at December 31, 2020 99,809 81,615 RSUs granted 47,029 31,479 RSUs added through dividend and performance credits 1,687 6,067 RSUs released (45,401) (19,272) RSUs forfeited/expired (190) (126) Outstanding at September 30, 2021 102,934 99,763

Non-interest Income and Expen_2

Non-interest Income and Expense (Tables)	9 Months Ended
	Sep. 30, 2021
Other Income and Expenses [Abstract]
Components of Non-Interest Income	The following table summarizes the Company’s non-interest income for the periods indicated: Three months ended Nine months ended (in thousands) 2021 2020 2021 2020 ATM and interchange fees $ 6,516 $ 5,637 $ 18,935 $ 15,913 Service charges on deposit accounts 3,608 3,334 10,339 10,426 Other service fees 897 805 2,682 2,296 Mortgage banking service fees 476 457 1,406 1,386 Change in value of mortgage servicing rights (232) 236 (691) (2,258) Total service charges and fees 11,265 10,469 32,671 27,763 Increase in cash value of life insurance 644 773 2,062 2,203 Asset management and commission income 957 667 2,738 2,244 Gain on sale of loans 1,814 3,035 7,908 5,662 Lease brokerage income 183 175 542 495 Sale of customer checks 107 91 342 303 Gain on sale of investment securities — 7 — 7 Gain (loss) on marketable equity securities (14) — (59) 72 Other 139 (80) 958 (135) Total other non-interest income 3,830 4,668 14,491 10,851 Total non-interest income $ 15,095 $ 15,137 $ 47,162 $ 38,614
Components of Non Interest Expense	The components of non-interest expense were as follows: Three months ended Nine months ended (in thousands) 2021 2020 2021 2020 Base salaries, net of deferred loan origination costs $ 17,673 $ 18,754 $ 50,721 $ 53,654 Incentive compensation 3,123 2,184 11,025 7,680 Benefits and other compensation costs 5,478 8,383 16,939 22,314 Total salaries and benefits expense 26,274 29,321 78,685 83,648 Occupancy 3,771 3,440 11,197 10,713 Data processing and software 3,689 3,561 10,092 10,585 Equipment 1,336 1,549 4,060 4,411 Intangible amortization 1,409 1,431 4,271 4,293 Advertising 966 869 2,080 2,065 ATM and POS network charges 1,692 1,314 4,489 3,897 Professional fees 1,090 955 2,730 2,399 Telecommunications 574 619 1,719 1,983 Regulatory assessments and insurance 673 538 1,903 993 Merger and acquisition expense 651 — 651 — Postage 156 118 478 691 Operational losses 244 154 665 559 Courier service 286 345 868 1,013 Gain on sale or acquisition of foreclosed assets (144) — (210) (57) (Gain) loss on disposal of fixed assets (19) 22 (445) 37 Other miscellaneous expense 3,159 2,478 8,363 9,783 Total other non-interest expense 19,533 17,393 52,911 53,365 Total non-interest expense $ 45,807 $ 46,714 $ 131,596 $ 137,013

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Computation of Earnings Per Share	Potential common shares that may be issued by the Company relate to outstanding stock options and restricted stock units (RSUs), and are determined using the treasury stock method. Earnings per share have been computed based on the following: Three months ended September 30, (in thousands) 2021 2020 Net income $ 27,422 $ 17,606 Average number of common shares outstanding 29,714 29,764 Effect of dilutive stock options and restricted stock 137 80 Average number of common shares outstanding used to calculate diluted earnings per share 29,851 29,844 Options excluded from diluted earnings per share because of their antidilutive effect — — Nine months ended September 30, (in thousands) 2021 2020 Net income $ 89,433 $ 41,157 Average number of common shares outstanding 29,720 29,971 Effect of dilutive stock options and restricted stock 167 112 Average number of common shares outstanding used to calculate diluted earnings per share 29,887 30,083 Options excluded from diluted earnings per share because of their antidilutive effect — —

Comprehensive Income (Loss) (Ta

Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Components of Other Comprehensive Income (Loss) and Related Tax Effects	The components of other comprehensive income (loss) and related tax effects are as follows: Three months ended September 30, Nine months ended (in thousands) 2021 2020 2021 2020 Unrealized holding losses on available for sale securities before reclassifications $ (6,304) $ 4,645 $ (11,249) $ 10,043 Amounts reclassified out of AOCI: Realized gain on debt securities — (7) — (7) Unrealized holding losses on available for sale securities after reclassifications (6,304) 4,638 (11,249) 10,036 Tax effect 1,864 (1,372) 3,325 (2,967) Unrealized holding losses on available for sale securities, net of tax (4,440) 3,266 (7,924) 7,069 Change in unfunded status of the supplemental retirement plans before reclassifications (49) 1,936 (147) 2,607 Amounts reclassified out of AOCI: Amortization of prior service cost (14) (14) (43) (41) Amortization of actuarial losses 63 478 190 1,434 Total amounts reclassified out of accumulated other comprehensive income 49 464 147 1,393 Change in unfunded status of the supplemental retirement plans after reclassifications — 2,400 — 4,000 Tax effect — (709) — (1,183) Change in unfunded status of the supplemental retirement plans, net of tax — 1,691 — 2,817 Change in joint beneficiary agreement liability before reclassifications — — (629) 912 Tax effect — — — — Change in joint beneficiary agreement liability before reclassifications, net of tax — — (629) 912 Total other comprehensive income (loss) $ (4,440) $ 4,957 $ (8,553) $ 10,798
Components of Accumulated Other Comprehensive Loss	The components of accumulated other comprehensive income, included in shareholders’ equity, are as follows: (in thousands) September 30, December 31, Net unrealized gain on available for sale securities $ 7,934 $ 19,183 Tax effect (2,346) (5,671) Unrealized holding gain on available for sale securities, net of tax 5,588 13,512 Unfunded status of the supplemental retirement plans (1,294) (1,294) Tax effect 382 382 Unfunded status of the supplemental retirement plans, net of tax (912) (912) Joint beneficiary agreement liability (949) (320) Tax effect — — Joint beneficiary agreement liability, net of tax (949) (320) Accumulated other comprehensive income $ 3,727 $ 12,280

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Recorded Amount of Assets and Liabilities Measured at Fair Value on Recurring Basis	The table below presents the recorded amount of assets and liabilities measured at fair value on a recurring basis (in thousands): Fair value at September 30, 2021 Total Level 1 Level 2 Level 3 Marketable equity securities $ 2,965 $ 2,965 Debt securities available for sale: Obligations of U.S. government corporations and agencies 1,244,616 1,244,616 Obligations of states and political subdivisions 168,107 168,107 Corporate bonds 6,796 6,796 Asset backed securities 676,302 676,302 Loans held for sale 3,072 3,072 Mortgage servicing rights 5,736 5,736 Total assets measured at fair value $ 2,107,594 $ 2,965 $ 2,098,893 $ 5,736 Fair value at December 31, 2020 Total Level 1 Level 2 Level 3 Marketable equity securities $ 3,025 $ 3,025 $ — $ — Debt securities available for sale: Obligations of U.S. government corporations and agencies 812,374 — 812,374 — Obligations of states and political subdivisions 129,095 — 129,095 — Corporate bonds 2,544 — 2,544 — Asset backed securities 470,251 — 470,251 — Loans held for sale 6,268 — 6,268 — Mortgage servicing rights 5,092 — — 5,092 Total assets measured at fair value $ 1,428,649 $ 3,025 $ 1,420,532 $ 5,092
Reconciliation of Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) on Recurring Basis	The following table provides a reconciliation of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the time periods indicated. Had there been any transfer into or out of Level 3 during the time periods indicated, the amount included in the “Transfers into (out of) Level 3” column would represent the beginning balance of an item in the period (interim quarter) during which it was transferred (in thousands): Three months ended September 30, Beginning Transfers Change Issuances Ending 2021: Mortgage servicing rights $ 5,603 — $ (233) $ 366 $ 5,736 2020: Mortgage servicing rights $ 4,250 — $ 236 $ 434 $ 4,920 Nine months ended September 30, Beginning Transfers Change Issuances Ending 2021: Mortgage servicing rights $ 5,092 $ (691) $ 1,335 $ 5,736 2020: Mortgage servicing rights $ 6,200 — $ (2,258) $ 978 $ 4,920
Quantitative Information about Recurring Level 3 Fair Value Measurements	The following table presents quantitative information about recurring Level 3 fair value measurements at September 30, 2021 and December 31, 2020: As of September 30, 2021: Fair Value Valuation Unobservable Range, Mortgage Servicing Rights $ 5,736 Discounted cash flow Constant prepayment rate 12% - 17%; 13.3% Discount rate 10% - 14%; 12% As of December 31, 2020: Mortgage Servicing Rights $ 5,092 Discounted cash flow Constant prepayment rate 14% - 20.0%; 17.6% Discount rate 10% - 14%; 12%
Assets and Liabilities Measured at Fair Value on Nonrecurring Basis	The tables below present the recorded investment in assets and liabilities measured at fair value on a nonrecurring basis, as of the dates indicated (in thousands): September 30, 2021 Total Level 1 Level 2 Level 3 Total Gains (Losses) Fair value: Individually evaluated loans $ 2,942 — — $ 2,942 $ (840) Foreclosed assets 447 — — 447 113 Total assets measured at fair value $ 3,389 $ — $ — $ 3,389 $ (727) December 31, 2020 Total Level 1 Level 2 Level 3 Total Gains (Losses) Fair value: Individually evaluated loans $ 1,424 — — $ 1,424 $ (1,489) Foreclosed assets 979 — — 979 155 Total assets measured at fair value $ 2,403 — — $ 2,403 $ (1,334) September 30, 2020 Total Level 1 Level 2 Level 3 Total Losses Fair value: Individually evaluated loans $ 1,024 — — $ 1,024 $ (309)
Quantitative Information about Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on Nonrecurring Basis	The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at September 30, 2021: September 30, 2021 Fair Value Valuation Unobservable Inputs Range, Individually evaluated loans $ 2,942 Sales comparison Adjustment for differences between Not meaningful Foreclosed assets (Residential real estate) $ 447 Sales comparison Adjustment for differences between Not meaningful The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at December 31, 2020: December 31, 2020 Fair Value Valuation Unobservable Inputs Range, Individually evaluated loans $ 1,424 Sales comparison Adjustment for differences between Not meaningful Foreclosed assets (Residential real estate) $ 979 Sales comparison Adjustment for differences between Not meaningful
Estimated Fair Values of Financial Instruments that are Reported at Amortized Cost in Consolidated Balance Sheets	September 30, 2021 December 31, 2020 (in thousands) Carrying Fair Carrying Fair Financial assets: Level 1 inputs: Cash and due from banks $ 83,188 $ 83,188 $ 77,253 $ 77,253 Cash at Federal Reserve and other banks 657,048 657,048 592,298 592,298 Level 2 inputs: Securities held to maturity 216,979 228,174 284,563 298,726 Restricted equity securities 17,250 N/A 17,250 N/A Level 3 inputs: Loans, net 4,803,190 4,808,023 4,671,280 4,753,027 Financial liabilities: Level 2 inputs: Deposits 7,236,822 7,243,986 6,505,934 6,507,235 Other borrowings 45,601 45,601 26,914 26,914 Level 3 inputs: Junior subordinated debt 57,965 57,907 57,635 56,632 (in thousands) Contract Fair Contract Fair Off-balance sheet: Level 3 inputs: Commitments $ 1,531,412 $ 15,314 $ 1,426,827 $ 14,268 Standby letters of credit 23,207 232 15,056 151 Overdraft privilege commitments 111,980 1,119 110,813 1,108

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2021
Banking Regulation, Global Systemically Important Bank (GSIB) Surcharge [Abstract]
Actual and Required Capital Ratios of Bank	Actual Required for Capital Adequacy Purposes Required to be As of September 30, 2021: Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total Capital (to Risk Weighted Assets): Consolidated $ 869,196 15.41 % $ 592,435 10.50 % N/A N/A Tri Counties Bank $ 860,080 15.26 % $ 591,775 10.50 % $ 563,595 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 798,433 14.15 % $ 479,590 8.50 % N/A N/A Tri Counties Bank $ 789,416 14.01 % $ 479,056 8.50 % $ 450,876 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 742,209 13.15 % $ 394,957 7.00 % N/A N/A Tri Counties Bank $ 789,416 14.01 % $ 394,517 7.00 % $ 366,337 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 798,433 9.85 % $ 324,391 4.00 % N/A N/A Tri Counties Bank $ 789,416 9.74 % $ 324,254 4.00 % $ 405,317 5.00 % Actual Required for Capital Adequacy Purposes Required to be As of December 31, 2020: Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total Capital (to Risk Weighted Assets): Consolidated $ 793,433 15.22 % $ 547,352 10.50 % N/A N/A Tri Counties Bank $ 780,320 14.97 % $ 547,156 10.50 % $ 521,101 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 727,879 13.96 % $ 443,094 8.50 % N/A N/A Tri Counties Bank $ 714,811 13.72 % $ 442,936 8.50 % $ 416,881 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 671,975 12.89 % $ 364,901 7.00 % N/A N/A Tri Counties Bank $ 714,811 13.72 % $ 364,771 7.00 % $ 338,716 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 727,879 9.93 % $ 293,138 4.00 % N/A N/A Tri Counties Bank $ 714,811 9.76 % $ 292,949 4.00 % $ 366,186 5.00 %

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)officesegmentcountytrust
Significant Accounting Policies [Line Items]
Number of subsidiary business trusts (in trusts) | trust	5
Number of loan production offices (in offices)	2
Company's investments in the trusts | $	$ 1,741
Number of business segment (in segments) | segment	1
Loans contractual past due	90 days
North Valley Bancorp
Significant Accounting Policies [Line Items]
Number of loan production offices (in offices)	3
Minimum
Significant Accounting Policies [Line Items]
Loan term	5 years
Amortization period	15 years
Maximum
Significant Accounting Policies [Line Items]
Loan term	10 years
Amortization period	30 years
California
Significant Accounting Policies [Line Items]
Number of counties (in counties) | county	31

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Values of Investments Securities (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Debt Securities Available for Sale
Amortized Cost	$ 2,087,887,000	$ 1,395,081,000
Gross Unrealized Gains	19,538,000	25,225,000
Gross Unrealized Losses	(11,604,000)	(6,042,000)
Allowance for Credit Losses	0	0
Estimated Fair Value	2,095,821,000	1,414,264,000
Debt Securities Held to Maturity
Amortized Cost	216,979,000	284,563,000
Gross Unrealized Gains	11,195,000	14,163,000
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Estimated Fair Value	228,174,000	298,726,000
Obligations of U.S. government agencies
Debt Securities Available for Sale
Amortized Cost	1,241,676,000	795,555,000
Gross Unrealized Gains	11,001,000	17,710,000
Gross Unrealized Losses	(8,061,000)	(891,000)
Allowance for Credit Losses	0	0
Estimated Fair Value	1,244,616,000	812,374,000
Debt Securities Held to Maturity
Amortized Cost	208,127,000	273,667,000
Gross Unrealized Gains	10,910,000	13,774,000
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Estimated Fair Value	219,037,000	287,441,000
Obligations of states and political subdivisions
Debt Securities Available for Sale
Amortized Cost	164,043,000	123,347,000
Gross Unrealized Gains	5,360,000	5,748,000
Gross Unrealized Losses	(1,296,000)	0
Allowance for Credit Losses	0	0
Estimated Fair Value	168,107,000	129,095,000
Debt Securities Held to Maturity
Amortized Cost	8,852,000	10,896,000
Gross Unrealized Gains	285,000	389,000
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Estimated Fair Value	9,137,000	11,285,000
Corporate bonds
Debt Securities Available for Sale
Amortized Cost	6,738,000	2,459,000
Gross Unrealized Gains	58,000	85,000
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Estimated Fair Value	6,796,000	2,544,000
Asset backed securities
Debt Securities Available for Sale
Amortized Cost	675,430,000	473,720,000
Gross Unrealized Gains	3,119,000	1,682,000
Gross Unrealized Losses	(2,247,000)	(5,151,000)
Allowance for Credit Losses	0	0
Estimated Fair Value	$ 676,302,000	$ 470,251,000

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021USD ($)investmentSecurity	Dec. 31, 2020USD ($)
Investment Securities [Line Items]
Securities pledged as collateral	$ 440,177,000	$ 429,049,000
Residential real estate mortgage-backed securities	$ 1,196,924,000,000
Life of mortgage-backed securities	4 years 2 months 26 days
Impairment losses recognized	$ 0
Allowance for Credit Losses	0	0
Obligations of U.S. government agencies
Investment Securities [Line Items]
Allowance for Credit Losses	$ 0	0
Number of available for sale securities in unrealized loss position (in investment securities) | investmentSecurity	40
Percentage of aggregate depreciation in unrealized losses	1.01%
Obligations of states and political subdivisions
Investment Securities [Line Items]
Allowance for Credit Losses	$ 0	0
Number of available for sale securities in unrealized loss position (in investment securities) | investmentSecurity	31
Percentage of aggregate depreciation in unrealized losses	2.02%
Asset backed securities
Investment Securities [Line Items]
Allowance for Credit Losses	$ 0	$ 0
Number of available for sale securities in unrealized loss position (in investment securities) | investmentSecurity	26
Percentage of aggregate depreciation in unrealized losses	0.62%

Investment Securities - Amort_2

Investment Securities - Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Amortized Cost
Due in one year	$ 8,771
Due after one year through five years	154,411
Due after five years through ten years	337,783
Due after ten years	1,586,922
Amortized Cost	2,087,887	$ 1,395,081
Estimated Fair Value
Due in one year	8,872
Due after one year through five years	154,531
Due after five years through ten years	339,617
Due after ten years	1,592,801
Totals	2,095,821	1,414,264
Amortized Cost
Due in one year	0
Due after one year through five years	1,020
Due after five years through ten years	22,548
Due after ten years	193,411
Totals	216,979	284,563
Estimated Fair Value
Due in one year	0
Due after one year through five years	1,129
Due after five years through ten years	23,346
Due after ten years	203,699
Totals	$ 228,174	$ 298,726

Investment Securities - Gross U

Investment Securities - Gross Unrealized Losses on Debt Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available for Sale, Less than 12 Months, Fair Value	$ 1,073,887	$ 212,087
Debt Securities, Available for Sale, Less than 12 Months, Unrealized Loss	(10,528)	(1,332)
Debt Securities, Available for Sale, 12 Months or more, Fair Value	141,119	297,020
Debt Securities, Available for Sale, 12 Months or more, Unrealized Loss	(1,076)	(4,710)
Debt Securities, Available for Sale, Fair Value	1,215,006	509,107
Debt Securities, Available-for-sale, Unrealized Loss	(11,604)	(6,042)
Obligations of U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available for Sale, Less than 12 Months, Fair Value	778,650	160,543
Debt Securities, Available for Sale, Less than 12 Months, Unrealized Loss	(7,907)	(891)
Debt Securities, Available for Sale, 12 Months or more, Fair Value	11,463	0
Debt Securities, Available for Sale, 12 Months or more, Unrealized Loss	(154)	0
Debt Securities, Available for Sale, Fair Value	790,113	160,543
Debt Securities, Available-for-sale, Unrealized Loss	(8,061)	(891)
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available for Sale, Less than 12 Months, Fair Value	62,820
Debt Securities, Available for Sale, Less than 12 Months, Unrealized Loss	(1,296)
Debt Securities, Available for Sale, 12 Months or more, Fair Value	0
Debt Securities, Available for Sale, 12 Months or more, Unrealized Loss	0
Debt Securities, Available for Sale, Fair Value	62,820
Debt Securities, Available-for-sale, Unrealized Loss	(1,296)
Asset backed securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available for Sale, Less than 12 Months, Fair Value	232,417	51,544
Debt Securities, Available for Sale, Less than 12 Months, Unrealized Loss	(1,325)	(441)
Debt Securities, Available for Sale, 12 Months or more, Fair Value	129,656	297,020
Debt Securities, Available for Sale, 12 Months or more, Unrealized Loss	(922)	(4,710)
Debt Securities, Available for Sale, Fair Value	362,073	348,564
Debt Securities, Available-for-sale, Unrealized Loss	$ (2,247)	$ (5,151)

Investment Securities - Amort_3

Investment Securities - Amortized Cost of Debt Securities Held-to-Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Securities held to maturity	$ 216,979	$ 284,563
AAA/AA/A
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Securities held to maturity	216,979	284,563
BBB/BB/B
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Securities held to maturity	0	0
Obligations of U.S. government agencies | AAA/AA/A
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Securities held to maturity	208,127	273,667
Obligations of U.S. government agencies | BBB/BB/B
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Securities held to maturity	0	0
Obligations of states and political subdivisions | AAA/AA/A
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Securities held to maturity	8,852	10,896
Obligations of states and political subdivisions | BBB/BB/B
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Securities held to maturity	$ 0	$ 0

Loans - Summary of Loan Balance

Loans - Summary of Loan Balances (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 4,887,496		$ 4,763,127
Total principal balance of loans owed, net of charge-offs	4,928,842		4,805,596
Unamortized net deferred loan fees	(17,218)		(16,984)
Deferred Discounts, Finance Charges and Interest Included in Receivables	(17,984)
Discounts to principal balance of loans owed, net of charge-offs	4,893,640		(25,485)
Allowance for credit losses on loans	(84,306)	$ (86,062)	(91,847)	$ (87,575)	$ (79,739)	$ (30,616)
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	3,222,737		2,951,902
Allowance for credit losses on loans	(50,729)	(51,637)	(53,693)	(50,294)	(44,850)	(11,995)
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total	1,053,653		952,108
Allowance for credit losses on loans	(23,491)	(23,950)	(25,148)	(24,007)	(23,165)	(10,084)
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Total	345,027		526,327
Allowance for credit losses on loans	(3,427)	(4,511)	(4,252)	(4,534)	(4,018)	(4,867)
Construction
Loans and Leases Receivable Disclosure [Line Items]
Total	216,680		284,842
Allowance for credit losses on loans	(5,528)	(4,951)	(7,540)	(7,640)	(6,775)	(3,388)
Agriculture production
Loans and Leases Receivable Disclosure [Line Items]
Total	44,410		44,164
Allowance for credit losses on loans	(1,119)	(1,007)	(1,209)	(1,093)	(919)	(261)
Leases
Loans and Leases Receivable Disclosure [Line Items]
Total	4,989		3,784
Allowance for credit losses on loans	(12)	(6)	(5)	(7)	(12)	(21)
CRE non-owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	1,526,030		1,535,555
Allowance for credit losses on loans	(25,221)	(26,028)	(29,380)	(28,847)	(26,091)	(5,948)
CRE owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	701,041		624,375
Allowance for credit losses on loans	(10,730)	(10,463)	(10,861)	(9,625)	(8,710)	(2,027)
Multifamily | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	829,644		639,480
Allowance for credit losses on loans	(12,876)	(13,196)	(11,472)	(10,032)	(8,581)	(3,352)
Farmland | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	166,022		152,492
Allowance for credit losses on loans	(1,902)	(1,950)	(1,980)	(1,790)	(1,468)	(668)
SFR 1-4 1st DT liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total	662,343		546,592
SFR HELOCs and junior liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total	323,258		327,484
Allowance for credit losses on loans	(10,431)	(10,701)	(11,771)	(11,676)	(12,108)	(6,183)
Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total	68,052		78,032
Allowance for credit losses on loans	$ (2,442)	$ (2,620)	$ (3,260)	$ (3,394)	$ (3,042)	$ (1,595)

Loans - Narrative (Details)

Loans - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 4,887,496		$ 4,887,496		$ 4,763,127
Loan balance, before allowance for credit loss and fee	4,928,842		4,928,842		4,805,596
Deferred loan fees	17,218		17,218		16,984
Loans, including fees	60,725	$ 58,039	181,465	$ 172,706
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans	345,027		345,027		526,327
Payment Protection Program (PPP)
Loans and Leases Receivable Disclosure [Line Items]
Loan balance, before allowance for credit loss and fee	640,410		640,410
Payment Protection Program (PPP) | Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans	157,461		157,461		$ 326,770
Deferred loan fees	25,299		25,299
Deferred loan costs	1,245		1,245
Deferred fee accretion	6,013		6,013
Loans, including fees	$ 2,984	$ 2,603	$ 10,306	$ 4,959
Payment Protection Program (PPP) | Commercial and industrial | Minimum
Loans and Leases Receivable Disclosure [Line Items]
Term of loan			24 months
Payment Protection Program (PPP) | Commercial and industrial | Maximum
Loans and Leases Receivable Disclosure [Line Items]
Term of loan			60 months

Allowance for Credit Losses - S

Allowance for Credit Losses - Summary of Activity in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 86,062	$ 79,739	$ 91,847	$ 30,616	$ 30,616
Charge-offs	(1,582)		(2,195)	(1,195)	(1,755)
Recoveries	1,321	381	2,534	1,503	1,885
Provision (benefit)	(1,495)	7,649	(7,880)	37,738	42,188
Ending balance	84,306	87,575	84,306	87,575	91,847
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	3,465	3,000	3,400	2,775	2,775
Charge-offs	0		0	0	0
Recoveries	0	0	0	0	0
Provision (benefit)	60	0	125	225	625
Ending balance	3,525	3,000	3,525	3,000	3,400
Credit Loss [Roll Forward]
Beginning balance	89,527	82,739	95,247	33,391	33,391
Charge-offs	(1,582)		(2,195)	(1,195)	(1,755)
Recoveries	1,321	381	2,534	1,503	1,885
Provision (benefit)	(1,435)	7,649	(7,755)	37,963	42,813
Ending balance	87,831	90,575	87,831	90,575	95,247
Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				18,913	18,913
Charge-offs		(194)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance				0	0
Charge-offs		0
Credit Loss [Roll Forward]
Beginning balance				18,913	18,913
Charge-offs		(194)
Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	51,637	44,850	53,693	11,995	11,995
Charge-offs	(144)	0	(144)	0	(182)
Recoveries	803	24	806	226	226
Provision (benefit)	(1,567)	5,420	(3,626)	26,225	29,806
Ending balance	50,729	50,294	50,729	50,294	53,693
Commercial real estate | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				11,848	11,848
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	23,950	23,165	25,148	10,084	10,084
Charge-offs	(326)	(100)	(605)	(507)	(799)
Recoveries	161	213	1,134	932	1,067
Provision (benefit)	(294)	729	(2,186)	5,214	6,512
Ending balance	23,491	24,007	23,491	24,007	25,148
Consumer | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				8,284	8,284
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,511	4,018	4,252	4,867	4,867
Charge-offs	(1,112)	(94)	(1,446)	(688)	(774)
Recoveries	355	142	570	323	568
Provision (benefit)	(327)	468	51	1,993	1,552
Ending balance	3,427	4,534	3,427	4,534	4,252
Commercial and industrial | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				(1,961)	(1,961)
Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,951	6,775	7,540	3,388	3,388
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision (benefit)	577	865	(2,012)	3,319	3,219
Ending balance	5,528	7,640	5,528	7,640	7,540
Construction | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				933	933
Agriculture production
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,007	919	1,209	261	261
Charge-offs	0	0	0	0	0
Recoveries	2	2	24	22	24
Provision (benefit)	110	172	(114)	989	1,103
Ending balance	1,119	1,093	1,119	1,093	1,209
Agriculture production | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				(179)	(179)
Leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6	12	5	21	21
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision (benefit)	6	(5)	7	(2)	(4)
Ending balance	12	7	12	7	5
Leases | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				(12)	(12)
CRE non-owner occupied | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	26,028	26,091	29,380	5,948	5,948
Charge-offs	0	0	0	0	0
Recoveries	10	23	12	223	198
Provision (benefit)	(817)	2,733	(4,171)	15,975	16,533
Ending balance	25,221	28,847	25,221	28,847	29,380
CRE non-owner occupied | Commercial real estate | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				6,701	6,701
CRE owner occupied | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,463	8,710	10,861	2,027	2,027
Charge-offs	(18)	0	(18)	0	0
Recoveries	793	1	794	3	28
Provision (benefit)	(508)	914	(907)	5,314	6,525
Ending balance	10,730	9,625	10,730	9,625	10,861
CRE owner occupied | Commercial real estate | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				2,281	2,281
Multifamily | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	13,196	8,581	11,472	3,352	3,352
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision (benefit)	(320)	1,451	1,404	4,399	5,839
Ending balance	12,876	10,032	12,876	10,032	11,472
Multifamily | Commercial real estate | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				2,281	2,281
Farmland | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,950	1,468	1,980	668	668
Charge-offs	(126)	0	(126)	0	(182)
Recoveries	0	0	0	0	0
Provision (benefit)	78	322	48	537	909
Ending balance	1,902	1,790	1,902	1,790	1,980
Farmland | Commercial real estate | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				585	585
SFR 1-4 1st DT liens | Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,629	8,015	10,117	2,306	2,306
Charge-offs	(145)	(2)	(145)	(13)	(13)
Recoveries	1	2	12	414	416
Provision (benefit)	133	922	634	3,555	4,733
Ending balance	10,618	8,937	10,618	8,937	10,117
SFR 1-4 1st DT liens | Consumer | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				2,675	2,675
SFR HELOCs and junior liens | Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,701	12,108	11,771	6,183	6,183
Charge-offs	0	0	0	(23)	(116)
Recoveries	63	126	860	265	304
Provision (benefit)	(333)	(558)	(2,200)	613	762
Ending balance	10,431	11,676	10,431	11,676	11,771
SFR HELOCs and junior liens | Consumer | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				4,638	4,638
Other | Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,620	3,042	3,260	1,595	1,595
Charge-offs	(181)	(98)	(460)	(471)	(670)
Recoveries	97	85	262	253	347
Provision (benefit)	(94)	365	(620)	1,046	1,017
Ending balance	$ 2,442	$ 3,394	$ 2,442	3,394	3,260
Other | Consumer | Impact of CECL Adoption
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				$ 971	$ 971

Allowance for Credit Losses - A

Allowance for Credit Losses - Additional Information (Detail) - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2019	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Loans and Leases Receivable Disclosure [Line Items]
Allowance for credit loss		$ 30,616	$ 84,306	$ 87,575	$ 84,306	$ 87,575	$ 86,062	$ 91,847	$ 79,739
Cumulative effect adjustment, decrease in retained earnings		(906,570)	(982,014)	(902,262)	(982,014)	(902,262)	(966,780)	(925,114)	(885,686)
Threshold for loan analysis			1,000		1,000
ASU 2016-13
Loans and Leases Receivable Disclosure [Line Items]
Allowance for credit loss	$ 18,913
Reclassification of financing receivable	$ 481
Retained Earnings
Loans and Leases Receivable Disclosure [Line Items]
Cumulative effect adjustment, decrease in retained earnings		(367,794)	(446,948)	(365,611)	(446,948)	(365,611)	(427,575)	(381,999)	(354,645)
Common Stock
Loans and Leases Receivable Disclosure [Line Items]
Cumulative effect adjustment, decrease in retained earnings		(543,998)	(531,339)	(531,075)	(531,339)	(531,075)	$ (531,038)	$ (530,835)	$ (530,422)
Impact of CECL Adoption
Loans and Leases Receivable Disclosure [Line Items]
Allowance for credit loss		18,913
Tax portion of cumulative effect adjustment		5,449
Cumulative effect adjustment, decrease in retained earnings		12,983
Impact of CECL Adoption | Retained Earnings
Loans and Leases Receivable Disclosure [Line Items]
Cumulative effect adjustment, decrease in retained earnings		$ 12,983
Financial Asset Originated
Loans and Leases Receivable Disclosure [Line Items]
Interest lost on nonaccrual loans			412	303	1,472	1,162
Interest income on nonaccrual loans			$ 117	$ 187	$ 293	$ 321

Allowance for Credit Losses -_2

Allowance for Credit Losses - Schedule Credit Quality Indicators (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	$ 998,259	$ 972,227
Fiscal year before latest fiscal year	652,646	647,339
Two years before latest fiscal year	569,131	525,260
Three years before latest fiscal year	399,865	540,927
Four years before latest fiscal year	451,347	436,909
Prior	1,194,619	1,016,093
Revolving Loans Amortized Cost Basis	603,787	599,620
Revolving Loans Converted to Term	17,842	24,752
Total	4,887,496	4,763,127
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	3,222,737	2,951,902
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total	1,053,653	952,108
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	166,972	356,701
Fiscal year before latest fiscal year	28,222	49,241
Two years before latest fiscal year	30,313	21,214
Three years before latest fiscal year	13,204	14,488
Four years before latest fiscal year	8,853	6,028
Prior	9,198	9,816
Revolving Loans Amortized Cost Basis	87,382	67,664
Revolving Loans Converted to Term	883	1,175
Total	345,027	526,327
Construction
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	52,507	69,133
Fiscal year before latest fiscal year	81,949	41,786
Two years before latest fiscal year	55,870	92,191
Three years before latest fiscal year	5,176	51,428
Four years before latest fiscal year	2,016	25,397
Prior	19,162	4,907
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	216,680	284,842
Agriculture production
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	2,037	977
Fiscal year before latest fiscal year	945	2,079
Two years before latest fiscal year	1,598	1,793
Three years before latest fiscal year	1,216	1,838
Four years before latest fiscal year	1,091	718
Prior	982	708
Revolving Loans Amortized Cost Basis	36,541	36,051
Revolving Loans Converted to Term	0	0
Total	44,410	44,164
Leases
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	4,989	3,784
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	4,989	3,784
CRE non-owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	150,987	120,520
Fiscal year before latest fiscal year	121,346	215,354
Two years before latest fiscal year	207,884	168,871
Three years before latest fiscal year	149,823	262,668
Four years before latest fiscal year	240,178	197,443
Prior	585,005	481,764
Revolving Loans Amortized Cost Basis	70,807	88,935
Revolving Loans Converted to Term	0	0
Total	1,526,030	1,535,555
CRE owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	153,332	105,896
Fiscal year before latest fiscal year	99,090	76,677
Two years before latest fiscal year	67,853	55,405
Three years before latest fiscal year	55,216	66,297
Four years before latest fiscal year	59,586	58,802
Prior	243,850	235,790
Revolving Loans Amortized Cost Basis	22,114	25,508
Revolving Loans Converted to Term	0	0
Total	701,041	624,375
Multifamily | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	197,898	87,087
Fiscal year before latest fiscal year	114,598	123,096
Two years before latest fiscal year	110,843	113,882
Three years before latest fiscal year	110,324	70,715
Four years before latest fiscal year	88,440	92,144
Prior	177,209	124,290
Revolving Loans Amortized Cost Basis	30,332	28,266
Revolving Loans Converted to Term	0	0
Total	829,644	639,480
Farmland | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	26,989	17,640
Fiscal year before latest fiscal year	18,422	28,270
Two years before latest fiscal year	23,856	19,148
Three years before latest fiscal year	17,650	14,707
Four years before latest fiscal year	9,377	7,604
Prior	23,783	21,450
Revolving Loans Amortized Cost Basis	45,945	43,673
Revolving Loans Converted to Term	0	0
Total	166,022	152,492
SFR 1-4 1st DT liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	225,634	183,719
Fiscal year before latest fiscal year	170,331	81,007
Two years before latest fiscal year	51,147	38,200
Three years before latest fiscal year	37,638	54,040
Four years before latest fiscal year	39,214	47,417
Prior	133,771	135,164
Revolving Loans Amortized Cost Basis	0	76
Revolving Loans Converted to Term	4,608	6,969
Total	662,343	546,592
SFR HELOCs and junior liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	591	793
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	29
Three years before latest fiscal year	0	360
Four years before latest fiscal year	0	300
Prior	304	1,032
Revolving Loans Amortized Cost Basis	310,012	308,362
Revolving Loans Converted to Term	12,351	16,608
Total	323,258	327,484
Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	16,323	25,977
Fiscal year before latest fiscal year	17,743	29,829
Two years before latest fiscal year	19,767	14,527
Three years before latest fiscal year	9,618	4,386
Four years before latest fiscal year	2,592	1,056
Prior	1,355	1,172
Revolving Loans Amortized Cost Basis	654	1,085
Revolving Loans Converted to Term	0	0
Total	68,052	78,032
Pass
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	977,000	962,685
Fiscal year before latest fiscal year	639,546	629,730
Two years before latest fiscal year	551,706	507,345
Three years before latest fiscal year	382,173	521,664
Four years before latest fiscal year	441,277	383,401
Prior	1,114,288	970,535
Revolving Loans Amortized Cost Basis	578,376	560,867
Revolving Loans Converted to Term	14,109	20,643
Total	4,698,475	4,556,870
Pass | Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	166,972	356,701
Fiscal year before latest fiscal year	25,705	48,838
Two years before latest fiscal year	30,078	20,463
Three years before latest fiscal year	12,775	13,151
Four years before latest fiscal year	7,865	5,185
Prior	8,503	9,490
Revolving Loans Amortized Cost Basis	85,476	65,938
Revolving Loans Converted to Term	691	1,085
Total	338,065	520,851
Pass | Construction
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	48,405	69,133
Fiscal year before latest fiscal year	80,862	41,786
Two years before latest fiscal year	55,870	92,191
Three years before latest fiscal year	5,176	51,082
Four years before latest fiscal year	1,670	20,868
Prior	19,048	2,876
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	211,031	277,936
Pass | Agriculture production
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	2,037	977
Fiscal year before latest fiscal year	945	2,079
Two years before latest fiscal year	1,598	1,590
Three years before latest fiscal year	1,053	1,838
Four years before latest fiscal year	1,091	663
Prior	930	708
Revolving Loans Amortized Cost Basis	34,526	36,051
Revolving Loans Converted to Term	0	0
Total	42,180	43,906
Pass | Leases
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	4,989	3,784
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	4,989	3,784
Pass | CRE non-owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	150,987	120,520
Fiscal year before latest fiscal year	121,346	207,899
Two years before latest fiscal year	199,462	155,730
Three years before latest fiscal year	136,871	256,677
Four years before latest fiscal year	235,302	179,523
Prior	552,648	460,644
Revolving Loans Amortized Cost Basis	69,077	76,730
Revolving Loans Converted to Term	0	0
Total	1,465,693	1,457,723
Pass | CRE owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	137,277	105,896
Fiscal year before latest fiscal year	99,090	75,144
Two years before latest fiscal year	66,978	53,816
Three years before latest fiscal year	53,684	58,371
Four years before latest fiscal year	58,367	54,541
Prior	232,613	227,828
Revolving Loans Amortized Cost Basis	22,114	25,508
Revolving Loans Converted to Term	0	0
Total	670,123	601,104
Pass | Multifamily | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	197,898	77,646
Fiscal year before latest fiscal year	105,210	118,725
Two years before latest fiscal year	106,446	113,882
Three years before latest fiscal year	110,324	70,112
Four years before latest fiscal year	88,440	67,457
Prior	152,383	123,518
Revolving Loans Amortized Cost Basis	22,648	19,007
Revolving Loans Converted to Term	0	0
Total	783,349	590,347
Pass | Farmland | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	26,989	17,640
Fiscal year before latest fiscal year	18,422	25,003
Two years before latest fiscal year	20,922	19,148
Three years before latest fiscal year	17,650	12,834
Four years before latest fiscal year	7,596	7,377
Prior	19,726	17,129
Revolving Loans Amortized Cost Basis	42,725	39,411
Revolving Loans Converted to Term	0	0
Total	154,030	138,542
Pass | SFR 1-4 1st DT liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	224,532	183,719
Fiscal year before latest fiscal year	170,331	80,717
Two years before latest fiscal year	50,860	36,342
Three years before latest fiscal year	35,379	53,001
Four years before latest fiscal year	38,529	46,467
Prior	127,044	126,465
Revolving Loans Amortized Cost Basis	0	76
Revolving Loans Converted to Term	3,312	5,507
Total	649,987	532,294
Pass | SFR HELOCs and junior liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	591	793
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	13
Three years before latest fiscal year	0	360
Four years before latest fiscal year	0	300
Prior	206	910
Revolving Loans Amortized Cost Basis	301,235	297,160
Revolving Loans Converted to Term	10,106	14,051
Total	312,138	313,587
Pass | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	16,323	25,876
Fiscal year before latest fiscal year	17,635	29,539
Two years before latest fiscal year	19,492	14,170
Three years before latest fiscal year	9,261	4,238
Four years before latest fiscal year	2,417	1,020
Prior	1,187	967
Revolving Loans Amortized Cost Basis	575	986
Revolving Loans Converted to Term	0	0
Total	66,890	76,796
Special Mention
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	21,259	9,484
Fiscal year before latest fiscal year	13,041	10,622
Two years before latest fiscal year	8,976	13,728
Three years before latest fiscal year	13,750	15,457
Four years before latest fiscal year	7,235	43,750
Prior	55,653	33,893
Revolving Loans Amortized Cost Basis	17,229	28,523
Revolving Loans Converted to Term	1,556	1,734
Total	138,699	157,191
Special Mention | Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	2,517	102
Two years before latest fiscal year	77	698
Three years before latest fiscal year	357	195
Four years before latest fiscal year	98	20
Prior	140	178
Revolving Loans Amortized Cost Basis	95	207
Revolving Loans Converted to Term	52	11
Total	3,336	1,411
Special Mention | Construction
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	4,102	0
Fiscal year before latest fiscal year	1,087	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	346
Four years before latest fiscal year	346	0
Prior	0	1,780
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	5,535	2,126
Special Mention | Agriculture production
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	203
Three years before latest fiscal year	163	0
Four years before latest fiscal year	0	49
Prior	52	0
Revolving Loans Amortized Cost Basis	1,894	0
Revolving Loans Converted to Term	0	0
Total	2,109	252
Special Mention | Leases
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Special Mention | CRE non-owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	7,455
Two years before latest fiscal year	8,422	11,692
Three years before latest fiscal year	11,555	5,407
Four years before latest fiscal year	4,312	15,773
Prior	19,770	18,832
Revolving Loans Amortized Cost Basis	1,730	12,205
Revolving Loans Converted to Term	0	0
Total	45,789	71,364
Special Mention | CRE owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	16,055	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	288
Three years before latest fiscal year	289	7,451
Four years before latest fiscal year	759	2,955
Prior	6,446	6,140
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	23,549	16,834
Special Mention | Multifamily | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	9,441
Fiscal year before latest fiscal year	9,388	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	603
Four years before latest fiscal year	0	24,687
Prior	24,664	772
Revolving Loans Amortized Cost Basis	7,684	9,259
Revolving Loans Converted to Term	0	0
Total	41,736	44,762
Special Mention | Farmland | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	2,567
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	1,271
Four years before latest fiscal year	1,197	227
Prior	2,683	3,107
Revolving Loans Amortized Cost Basis	1,558	2,258
Revolving Loans Converted to Term	0	0
Total	5,438	9,430
Special Mention | SFR 1-4 1st DT liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	1,102	0
Fiscal year before latest fiscal year	0	290
Two years before latest fiscal year	287	684
Three years before latest fiscal year	1,149	110
Four years before latest fiscal year	418	15
Prior	1,754	2,936
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	785	934
Total	5,495	4,969
Special Mention | SFR HELOCs and junior liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	16
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	86	83
Revolving Loans Amortized Cost Basis	4,202	4,504
Revolving Loans Converted to Term	719	789
Total	5,007	5,392
Special Mention | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	43
Fiscal year before latest fiscal year	49	208
Two years before latest fiscal year	190	147
Three years before latest fiscal year	237	74
Four years before latest fiscal year	105	24
Prior	58	65
Revolving Loans Amortized Cost Basis	66	90
Revolving Loans Converted to Term	0	0
Total	705	651
Substandard
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	58
Fiscal year before latest fiscal year	59	6,987
Two years before latest fiscal year	8,449	4,187
Three years before latest fiscal year	3,942	3,806
Four years before latest fiscal year	2,835	9,758
Prior	24,678	11,665
Revolving Loans Amortized Cost Basis	8,182	10,230
Revolving Loans Converted to Term	2,177	2,375
Total	50,322	49,066
Substandard | Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	301
Two years before latest fiscal year	158	53
Three years before latest fiscal year	72	1,142
Four years before latest fiscal year	890	823
Prior	555	148
Revolving Loans Amortized Cost Basis	1,811	1,519
Revolving Loans Converted to Term	140	79
Total	3,626	4,065
Substandard | Construction
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	4,529
Prior	114	251
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	114	4,780
Substandard | Agriculture production
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	6
Prior	0	0
Revolving Loans Amortized Cost Basis	121	0
Revolving Loans Converted to Term	0	0
Total	121	6
Substandard | Leases
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Substandard | CRE non-owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	1,449
Three years before latest fiscal year	1,397	584
Four years before latest fiscal year	564	2,147
Prior	12,587	2,288
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	14,548	6,468
Substandard | CRE owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	1,533
Two years before latest fiscal year	875	1,301
Three years before latest fiscal year	1,243	475
Four years before latest fiscal year	460	1,306
Prior	4,791	1,822
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	7,369	6,437
Substandard | Multifamily | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	4,371
Two years before latest fiscal year	4,397	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	162	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	4,559	4,371
Substandard | Farmland | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	700
Two years before latest fiscal year	2,934	0
Three years before latest fiscal year	0	602
Four years before latest fiscal year	584	0
Prior	1,374	1,214
Revolving Loans Amortized Cost Basis	1,662	2,004
Revolving Loans Converted to Term	0	0
Total	6,554	4,520
Substandard | SFR 1-4 1st DT liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	1,174
Three years before latest fiscal year	1,110	929
Four years before latest fiscal year	267	935
Prior	4,973	5,763
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	511	528
Total	6,861	9,329
Substandard | SFR HELOCs and junior liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	12	39
Revolving Loans Amortized Cost Basis	4,575	6,698
Revolving Loans Converted to Term	1,526	1,768
Total	6,113	8,505
Substandard | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	58
Fiscal year before latest fiscal year	59	82
Two years before latest fiscal year	85	210
Three years before latest fiscal year	120	74
Four years before latest fiscal year	70	12
Prior	110	140
Revolving Loans Amortized Cost Basis	13	9
Revolving Loans Converted to Term	0	0
Total	457	585
Doubtful/Loss
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Doubtful/Loss | Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Doubtful/Loss | Construction
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Doubtful/Loss | Agriculture production
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Doubtful/Loss | Leases
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Doubtful/Loss | CRE non-owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Doubtful/Loss | CRE owner occupied | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Doubtful/Loss | Multifamily | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Doubtful/Loss | Farmland | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Doubtful/Loss | SFR 1-4 1st DT liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Doubtful/Loss | SFR HELOCs and junior liens | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Doubtful/Loss | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Current fiscal year	0	0
Fiscal year before latest fiscal year	0	0
Two years before latest fiscal year	0	0
Three years before latest fiscal year	0	0
Four years before latest fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	$ 0	$ 0

Allowance for Credit Losses -_3

Allowance for Credit Losses - Analysis of Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total	$ 4,887,496	$ 4,763,127
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	3,222,737	2,951,902
Consumer
Financing Receivable, Past Due [Line Items]
Total	1,053,653	952,108
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	345,027	526,327
Construction
Financing Receivable, Past Due [Line Items]
Total	216,680	284,842
Agriculture production
Financing Receivable, Past Due [Line Items]
Total	44,410	44,164
Leases
Financing Receivable, Past Due [Line Items]
Total	4,989	3,784
CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	1,526,030	1,535,555
CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	701,041	624,375
Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	829,644	639,480
Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	166,022	152,492
SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Total	662,343	546,592
SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Total	323,258	327,484
Other | Consumer
Financing Receivable, Past Due [Line Items]
Total	68,052	78,032
Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Past due	10,539	6,767
Current	4,876,957	4,756,360
Total	4,887,496	4,763,127
Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	6,477	2,629
Current	3,216,260	2,949,273
Total	3,222,737	2,951,902
Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Past due	3,327	3,452
Current	1,050,326	948,656
Total	1,053,653	952,108
Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due	567	686
Current	344,460	525,641
Total	345,027	526,327
Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Past due	0	0
Current	216,680	284,842
Total	216,680	284,842
Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Past due	168	0
Current	44,242	44,164
Total	44,410	44,164
Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Past due	0	0
Current	4,989	3,784
Total	4,989	3,784
Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	930	539
Current	1,525,100	1,535,016
Total	1,526,030	1,535,555
Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	193	1,121
Current	700,848	623,254
Total	701,041	624,375
Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	4,729	0
Current	824,915	639,480
Total	829,644	639,480
Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	625	969
Current	165,397	151,523
Total	166,022	152,492
Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	403	997
Current	661,940	545,595
Total	662,343	546,592
Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	2,841	2,301
Current	320,417	325,183
Total	323,258	327,484
Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	83	154
Current	67,969	77,878
Total	68,052	78,032
30-59 days | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Past due	7,425	1,974
30-59 days | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	5,732	1,323
30-59 days | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Past due	1,267	496
30-59 days | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due	377	155
30-59 days | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Past due	0	0
30-59 days | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Past due	49	0
30-59 days | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Past due	0	0
30-59 days | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	810	127
30-59 days | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	193	297
30-59 days | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	4,729	0
30-59 days | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	0	899
30-59 days | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	24	37
30-59 days | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	1,220	418
30-59 days | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	23	41
60-89 days | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Past due	516	824
60-89 days | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	50	173
60-89 days | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Past due	403	225
60-89 days | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due	63	426
60-89 days | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Past due	0	0
60-89 days | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Past due	0	0
60-89 days | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Past due	0	0
60-89 days | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	0	173
60-89 days | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	0
60-89 days | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due		0
60-89 days | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	50	0
60-89 days | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	163	0
60-89 days | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	205	212
60-89 days | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	35	13
> 90 days | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Past due	2,598	3,969
> 90 days | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	695	1,133
> 90 days | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Past due	1,657	2,731
> 90 days | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Past due	127	105
> 90 days | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Past due	0	0
> 90 days | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Past due	119	0
> 90 days | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Past due	0	0
> 90 days | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	120	239
> 90 days | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	0	824
> 90 days | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due		0
> 90 days | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due	575	70
> 90 days | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	216	960
> 90 days | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Past due	1,416	1,671
> 90 days | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	$ 25	$ 100

Allowance for Credit Losses -_4

Allowance for Credit Losses - Schedule of Non Accrual Loans (Detail) - Financial Asset Originated - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	$ 26,138	$ 21,703
Non accrual with no allowance for credit losses	26,817	22,390
Nonaccrual loans	28,790	26,864
Total non accrual	28,015	26,053
Loans Insured or Guaranteed by US Government Authorities
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	679	687
Total non accrual	775	811
> 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
Commercial real estate
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	18,298	7,689
Total non accrual	18,297	8,709
Commercial real estate | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
Consumer
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	7,165	9,498
Total non accrual	7,951	11,408
Consumer | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	1,339	652
Total non accrual	2,407	2,183
Commercial and industrial | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
Construction
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	15	4,546
Total non accrual	15	4,546
Construction | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
Agriculture production
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	0	5
Total non accrual	120	18
Agriculture production | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
Leases
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	0	0
Total non accrual	0	0
Leases | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	12,591	3,110
Total non accrual	7,713	3,110
CRE non-owner occupied | Commercial real estate | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	0	3,111
Total non accrual	4,877	4,061
CRE owner occupied | Commercial real estate | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	4,560	0
Total non accrual	4,560	0
Multifamily | Commercial real estate | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	1,147	1,468
Total non accrual	1,147	1,538
Farmland | Commercial real estate | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	3,831	4,950
Total non accrual	3,833	5,093
SFR 1-4 1st DT liens | Consumer | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	3,282	4,480
Total non accrual	4,034	6,148
SFR HELOCs and junior liens | Consumer | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	0	0
Other | Consumer
Financing Receivable, Past Due [Line Items]
Non accrual with no allowance for credit losses	52	68
Total non accrual	84	167
Other | Consumer | > 90 days
Financing Receivable, Past Due [Line Items]
Past due 90 days or more and still accruing	$ 0	$ 0

Allowance for Credit Losses -_5

Allowance for Credit Losses - Amortized Cost Basis of Collateral Dependent Loans, By Class of Loan (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 4,887,496	$ 4,763,127
Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,858	3,241
Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,285	1,611
Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,583	1,668
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	7,029	334
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,560	0
Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,147	1,538
SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	5,420	11,469
SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,848	2,839
Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	18	97
A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,231	1,186
Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	142	80
Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	28,121	24,063
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,222,737	2,951,902
Commercial real estate | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,858	3,241
Commercial real estate | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,285	1,611
Commercial real estate | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,583	1,668
Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6,865	0
Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,560	0
Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,147	1,538
Commercial real estate | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	18,298	8,058
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,053,653	952,108
Consumer | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	44	42
Consumer | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	5,404	6,923
Consumer | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,848	2,839
Consumer | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	18	97
Consumer | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	12	0
Consumer | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	7,326	9,901
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	345,027	526,327
Commercial and industrial | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	292
Commercial and industrial | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,231	1,173
Commercial and industrial | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	130	75
Commercial and industrial | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,361	1,540
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	216,680	284,842
Construction | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	16	4,546
Construction | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Construction | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	16	4,546
Agriculture production
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	44,410	44,164
Agriculture production | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	120	0
Agriculture production | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agriculture production | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	13
Agriculture production | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	5
Agriculture production | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	120	18
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,989	3,784
Leases | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,526,030	1,535,555
CRE non-owner occupied | Commercial real estate | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,858	2,445
CRE non-owner occupied | Commercial real estate | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,285	435
CRE non-owner occupied | Commercial real estate | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,583	0
CRE non-owner occupied | Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6,865	0
CRE non-owner occupied | Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE non-owner occupied | Commercial real estate | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	12,591	2,880
CRE owner occupied | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	701,041	624,375
CRE owner occupied | Commercial real estate | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	796
CRE owner occupied | Commercial real estate | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	1,176
CRE owner occupied | Commercial real estate | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	1,668
CRE owner occupied | Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
CRE owner occupied | Commercial real estate | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	3,640
Multifamily | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	829,644	639,480
Multifamily | Commercial real estate | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,560	0
Multifamily | Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Multifamily | Commercial real estate | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,560	0
Farmland | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	166,022	152,492
Farmland | Commercial real estate | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,147	1,538
Farmland | Commercial real estate | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Farmland | Commercial real estate | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,147	1,538
SFR 1-4 1st DT liens | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	662,343	546,592
SFR 1-4 1st DT liens | Consumer | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,830	5,068
SFR 1-4 1st DT liens | Consumer | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR 1-4 1st DT liens | Consumer | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,830	5,068
SFR HELOCs and junior liens | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	323,258	327,484
SFR HELOCs and junior liens | Consumer | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,574	1,855
SFR HELOCs and junior liens | Consumer | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,848	2,839
SFR HELOCs and junior liens | Consumer | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
SFR HELOCs and junior liens | Consumer | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,422	4,694
Other | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	68,052	78,032
Other | Consumer | Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	44	42
Other | Consumer | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | SFR -1st Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | SFR -2nd Deed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Automobile/Truck
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	18	97
Other | Consumer | A/R and Inventory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	12	0
Other | Consumer | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 74	$ 139

Allowance for Credit Losses - T

Allowance for Credit Losses - Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)investmentSecurity	Sep. 30, 2020USD ($)investmentSecurity	Sep. 30, 2021USD ($)investmentSecurity	Sep. 30, 2020USD ($)investmentSecurity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	6,000	6,000	14	12,000
Pre-mod outstanding principal balance	$ 4,153	$ 2,741	$ 8,232	$ 3,420
Post-mod outstanding principal balance	4,147	2,655	8,217	3,393
Financial impact due to TDR taken as additional provision	$ 156	$ 381	$ 2,521	$ 402
Number that defaulted during the period (in investment securities) | investmentSecurity	1,000	4,000	5	5,000
Recorded investment of TDRs that defaulted during the period	$ 13	$ 1,685	$ 1,107	$ 2,579
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ (5)	$ 0	$ (5)	$ 0
Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	4,000	6,000	7	9,000
Pre-mod outstanding principal balance	$ 3,993	$ 2,741	$ 5,756	$ 3,227
Post-mod outstanding principal balance	3,988	2,655	5,748	3,204
Financial impact due to TDR taken as additional provision	$ 50	$ 381	$ 1,812	$ 381
Number that defaulted during the period (in investment securities) | investmentSecurity	0	3,000	3	3,000
Recorded investment of TDRs that defaulted during the period	$ 0	$ 1,542	$ 847	$ 1,542
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	0	0	0	2,000
Pre-mod outstanding principal balance	$ 0	$ 0	$ 0	$ 172
Post-mod outstanding principal balance	0	0	0	169
Financial impact due to TDR taken as additional provision	$ 0	$ 0	$ 0	$ 0
Number that defaulted during the period (in investment securities) | investmentSecurity	0	1,000	0	2,000
Recorded investment of TDRs that defaulted during the period	$ 0	$ 143	$ 0	$ 1,037
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	2,000	0	7	0
Pre-mod outstanding principal balance	$ 160	$ 0	$ 2,476	$ 0
Post-mod outstanding principal balance	159	0	2,469	0
Financial impact due to TDR taken as additional provision	$ 106	$ 0	$ 709	$ 0
Number that defaulted during the period (in investment securities) | investmentSecurity	1,000	0	2	0
Recorded investment of TDRs that defaulted during the period	$ 13	$ 0	$ 260	$ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ (5)	$ 0	$ (5)	$ 0
Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	0	0	0	1,000
Pre-mod outstanding principal balance	$ 0	$ 0	$ 0	$ 21
Post-mod outstanding principal balance	0	0	0	20
Financial impact due to TDR taken as additional provision	$ 0	$ 0	$ 0	$ 21
Number that defaulted during the period (in investment securities) | investmentSecurity	0	0	0	0
Recorded investment of TDRs that defaulted during the period	$ 0	$ 0	$ 0	$ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0
Agriculture production
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	0	0	0	0
Pre-mod outstanding principal balance	$ 0	$ 0	$ 0	$ 0
Post-mod outstanding principal balance	0	0	0	0
Financial impact due to TDR taken as additional provision	$ 0	$ 0	$ 0	$ 0
Number that defaulted during the period (in investment securities) | investmentSecurity	0	0	0	0
Recorded investment of TDRs that defaulted during the period	$ 0	$ 0	$ 0	$ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0
Leases
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	0	0	0	0
Pre-mod outstanding principal balance	$ 0	$ 0	$ 0	$ 0
Post-mod outstanding principal balance	0	0	0	0
Financial impact due to TDR taken as additional provision	$ 0	$ 0	$ 0	$ 0
Number that defaulted during the period (in investment securities) | investmentSecurity	0	0	0	0
Recorded investment of TDRs that defaulted during the period	$ 0	$ 0	$ 0	$ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0
CRE non-owner occupied | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	3,000	1,000	5	2,000
Pre-mod outstanding principal balance	$ 3,943	$ 319	$ 4,966	$ 576
Post-mod outstanding principal balance	3,938	314	4,956	565
Financial impact due to TDR taken as additional provision	$ 0	$ 314	$ 1,020	$ 314
Number that defaulted during the period (in investment securities) | investmentSecurity	0	1,000	0	1,000
Recorded investment of TDRs that defaulted during the period	$ 0	$ 141	$ 0	$ 141
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0
CRE owner occupied | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	0	5,000	1	5,000
Pre-mod outstanding principal balance	$ 0	$ 2,422	$ 740	$ 2,422
Post-mod outstanding principal balance	0	2,341	742	2,341
Financial impact due to TDR taken as additional provision	$ 0	$ 67	$ 742	$ 67
Number that defaulted during the period (in investment securities) | investmentSecurity	0	2,000	0	2,000
Recorded investment of TDRs that defaulted during the period	$ 0	$ 1,401	$ 0	$ 1,401
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0
Multifamily | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	0	0	0	0
Pre-mod outstanding principal balance	$ 0	$ 0	$ 0	$ 0
Post-mod outstanding principal balance	0	0	0	0
Financial impact due to TDR taken as additional provision	$ 0	$ 0	$ 0	$ 0
Number that defaulted during the period (in investment securities) | investmentSecurity	0	0	0	0
Recorded investment of TDRs that defaulted during the period	$ 0	$ 0	$ 0	$ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0
Farmland | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	1,000	0	1	2,000
Pre-mod outstanding principal balance	$ 50	$ 0	$ 50	$ 229
Post-mod outstanding principal balance	50	0	50	298
Financial impact due to TDR taken as additional provision	$ 50	$ 0	$ 50	$ 0
Number that defaulted during the period (in investment securities) | investmentSecurity	0	0	3	0
Recorded investment of TDRs that defaulted during the period	$ 0	$ 0	$ 847	$ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0
SFR 1-4 1st DT liens | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	0	0	0	0
Pre-mod outstanding principal balance	$ 0	$ 0	$ 0	$ 0
Post-mod outstanding principal balance	0	0	0	0
Financial impact due to TDR taken as additional provision	$ 0	$ 0	$ 0	$ 0
Number that defaulted during the period (in investment securities) | investmentSecurity	0	0	0	2,000
Recorded investment of TDRs that defaulted during the period	$ 0	$ 0	$ 0	$ 1,037
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0
SFR HELOCs and junior liens | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	0	0	0	2,000
Pre-mod outstanding principal balance	$ 0	$ 0	$ 0	$ 172
Post-mod outstanding principal balance	0	0	0	169
Financial impact due to TDR taken as additional provision	$ 0	$ 0	$ 0	$ 0
Number that defaulted during the period (in investment securities) | investmentSecurity	0	1,000	0	0
Recorded investment of TDRs that defaulted during the period	$ 0	$ 143	$ 0	$ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0
Other | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number (in investment securities) | investmentSecurity	0	0	0	0
Pre-mod outstanding principal balance	$ 0	$ 0	$ 0	$ 0
Post-mod outstanding principal balance	0	0	0	0
Financial impact due to TDR taken as additional provision	$ 0	$ 0	$ 0	$ 0
Number that defaulted during the period (in investment securities) | investmentSecurity	0	0	0	0
Recorded investment of TDRs that defaulted during the period	$ 0	$ 0	$ 0	$ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions	$ 0	$ 0	$ 0	$ 0

Leases - Additional Information

Leases - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021renewalOption
Leases [Abstract]
Number of lease renewal options (in renewal options)	1

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Operating lease cost	$ 1,328	$ 1,284	$ 3,854	$ 3,869
Short-term lease cost	57	67	180	195
Variable lease cost	8	(1)	5	6
Sublease income	0	(33)	(24)	(102)
Total lease cost	$ 1,393	$ 1,317	$ 4,015	$ 3,968

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information Related To Leases (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Operating cash flows for operating leases	$ 1,261	$ 1,236	$ 3,690	$ 3,716
ROUA obtained in exchange for operating lease liabilities	$ 1,575	$ 93	$ 2,883	$ 4,161

Leases - Weighted Average Opera

Leases - Weighted Average Operating Lease Term And Discount Rate (Detail)	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Weighted-average remaining lease term (years)	9 years 3 months 18 days	10 years
Weighted-average discount rate	2.92%	3.10%

Leases - Future Minimum Rental

Leases - Future Minimum Rental Payments For Operating Leases (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
2021	$ 1,215
2022	4,714
2023	4,071
2024	3,716
2025	3,132
Thereafter	15,057
Total	31,905
Discount for present value of expected cash flows	(4,615)
Lease liability	$ 27,290	$ 27,973

Deposits - Summary of Balances

Deposits - Summary of Balances of Deposits (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Deposits [Abstract]
Noninterest-bearing demand	$ 2,943,016	$ 2,581,517
Interest-bearing demand	1,519,426	1,414,908
Savings	2,447,706	2,164,942
Time certificates, $250,000 or more	58,503	73,147
Other time certificates	268,171	271,420
Total deposits	$ 7,236,822	$ 6,505,934

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Schedule Of Deposits [Line Items]
Overdrawn deposit balances classified as consumer loans	$ 1,110,000	$ 985,000
California
Schedule Of Deposits [Line Items]
Certificate of deposits, included in time certificates, over $250,000	$ 10,000,000	$ 10,000,000

Commitments and Contingencies -

Commitments and Contingencies - Summary of Bank's Commitments and Contingent Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit
Real estate construction loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	209,407	227,876
Real estate mortgage loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	321,745	202,306
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	23,207	15,056
Commercial loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	405,112	462,422
Consumer loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	595,148	534,223
Deposit account overdraft privilege
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	$ 111,980	$ 110,813

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Feb. 25, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Cash dividends received	$ 7,058		$ 6,913	$ 23,197	$ 46,361
Repurchase of common stock	$ 1,114		$ 242	3,675	25,545
Market value of shares repurchased under equity compensation plans				$ 835	$ 736
Employee Stock
Class of Stock [Line Items]
Company's common stock in lieu of cash to exercise options to purchase shares (in shares)	0		7,820	0	12,488
Other Share Based Awards
Class of Stock [Line Items]
Company's common stock in lieu of cash to exercise options to purchase shares (in shares)	9,683		619	19,413	12,058
2021 Stock Repurchase Plan
Class of Stock [Line Items]
Repurchase of common stock (in shares)						2,000,000
Stock repurchase program, percentage of common stock						6.70%
Repurchase of common stock (in shares)	17,963			63,317
Repurchase of common stock	$ 730			$ 2,831
2019 Stock Repurchase Plan
Class of Stock [Line Items]
Repurchase of common stock (in shares)		223
Repurchase of common stock		$ 8
Cumulative number of shares repurchased (in shares)							858,717
Common Stock
Class of Stock [Line Items]
Repurchase of common stock (in shares)	27,646		8,439	82,953	838,408
Repurchase of common stock	$ 494		$ 151	$ 1,482	$ 14,946
Market value of shares repurchased under equity compensation plans	$ 384		$ 242	$ 836	$ 588

Stock Options and Other Equit_3

Stock Options and Other Equity-Based Incentive Instruments - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020	Apr. 16, 2019
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Weighted-average remaining contractual term (in years)	1 year 7 months 6 days
Number of units released (in shares)	0
Number of units increased (in shares)	149,645
Restricted Stock Units (RSUs) | Service Condition Vesting RSUs
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of units outstanding expected to vest (in shares)	102,934	99,809
Pre-tax compensation costs	$ 3,406
Number of units released (in shares)	45,401
Restricted Stock Units (RSUs) | Market Plus Service Condition Vesting RSUs
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of units outstanding expected to vest (in shares)	99,763	81,615
Weighted-average remaining contractual term (in years)	1 year 9 months 18 days
Pre-tax compensation costs	$ 1,852
Number of units released (in shares)	19,272
2019 Plan
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Aggregate number of shares of TriCo's common stock issued (in shares)			1,500,000

Stock Options and Other Equit_4

Stock Options and Other Equity-Based Incentive Instruments - Stock Option Activity (Detail)	9 Months Ended
	Sep. 30, 2021$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at beginning of period (in shares) | shares	128,500
Options granted (in shares) | shares	0
Options exercised (in shares) | shares	(5,675)
Options forfeited (in shares) | shares	0
Options outstanding at end of period (in shares) | shares	122,825
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price at beginning of period (in USD per share) | $ / shares	$ 17.72
Weighted Average Exercise Price of Options Granted (in USD per share) | $ / shares	0
Weighted Average Exercise Price of Options Exercised (in USD per share) | $ / shares	15.20
Weighted Average Exercise Price of Options Forfeited (in USD per share) | $ / shares	0
Weighted Average Exercise Price at end of period (in USD per share) | $ / shares	$ 17.80

Stock Options and Other Equit_5

Stock Options and Other Equity-Based Incentive Instruments - Summary of Options Outstanding (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of options (in shares)	122,825	128,500
Weighted average exercise price (in USD per share)	$ 17.80	$ 17.72
Intrinsic value (in thousands)	$ 3,144
Weighted average remaining contractual term (in years)	1 year 6 months
Currently Exercisable
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of options (in shares)	122,825
Weighted average exercise price (in USD per share)	$ 17.80
Intrinsic value (in thousands)	$ 3,144
Weighted average remaining contractual term (in years)	1 year 3 months 18 days
Currently Not Exercisable
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of options (in shares)	0
Weighted average exercise price (in USD per share)	$ 0
Intrinsic value (in thousands)	$ 0
Weighted average remaining contractual term (in years)	0 years

Stock Options and Other Equit_6

Stock Options and Other Equity-Based Incentive Instruments - Restricted Stock Unit (RSU) Activity (Detail)	9 Months Ended
	Sep. 30, 2021shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
RSUs released (in shares)	0
Restricted Stock Units (RSUs) | Service Condition Vesting RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period (in shares)	99,809
RSUs granted (in shares)	47,029
RSUs added through dividend and performance credits (in shares)	1,687
RSUs released (in shares)	(45,401)
RSUs forfeited/expired (in shares)	(190)
Outstanding at end of period (in shares)	102,934
Restricted Stock Units (RSUs) | Market Plus Service Condition Vesting RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period (in shares)	81,615
RSUs granted (in shares)	31,479
RSUs added through dividend and performance credits (in shares)	6,067
RSUs released (in shares)	(19,272)
RSUs forfeited/expired (in shares)	(126)
Outstanding at end of period (in shares)	99,763

Non-interest Income and Expen_3

Non-interest Income and Expense - Components of Non-Interest Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ 11,265	$ 10,469	$ 32,671	$ 27,763
Increase in cash value of life insurance	644	773	2,062	2,203
Asset management and commission income	957	667	2,738	2,244
Gain on sale of loans	1,814	3,035	7,908	5,662
Lease brokerage income	183	175	542	495
Sale of customer checks	107	91	342	303
Gain on sale of investment securities	0	7	0	7
Gain (loss) on marketable equity securities	(14)	0	(59)	72
Other	139	(80)	958	(135)
Total other non-interest income	3,830	4,668	14,491	10,851
Total non-interest income	15,095	15,137	47,162	38,614
ATM and interchange fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	6,516	5,637	18,935	15,913
Service charges on deposit accounts
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	3,608	3,334	10,339	10,426
Other service fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	897	805	2,682	2,296
Mortgage banking service fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	476	457	1,406	1,386
Change in value of mortgage servicing rights
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ (232)	$ 236	$ (691)	$ (2,258)

Non-interest Income and Expen_4

Non-interest Income and Expense - Components of Non Interest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income and Expenses [Abstract]
Base salaries, net of deferred loan origination costs	$ 17,673	$ 18,754	$ 50,721	$ 53,654
Incentive compensation	3,123	2,184	11,025	7,680
Benefits and other compensation costs	5,478	8,383	16,939	22,314
Total salaries and benefits expense	26,274	29,321	78,685	83,648
Occupancy	3,771	3,440	11,197	10,713
Data processing and software	3,689	3,561	10,092	10,585
Equipment	1,336	1,549	4,060	4,411
Intangible amortization	1,409	1,431	4,271	4,293
Advertising	966	869	2,080	2,065
ATM and POS network charges	1,692	1,314	4,489	3,897
Professional fees	1,090	955	2,730	2,399
Telecommunications	574	619	1,719	1,983
Regulatory assessments and insurance	673	538	1,903	993
Merger and acquisition expense	651	0	651	0
Postage	156	118	478	691
Operational losses	244	154	665	559
Courier service	286	345	868	1,013
Gain on sale or acquisition of foreclosed assets	(144)	0	(210)	(57)
(Gain) loss on disposal of fixed assets	(19)	22	(445)	37
Other miscellaneous expense	3,159	2,478	8,363	9,783
Total other non-interest expense	19,533	17,393	52,911	53,365
Total non-interest expense	$ 45,807	$ 46,714	$ 131,596	$ 137,013

Earnings Per Share - Computatio

Earnings Per Share - Computation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income	$ 27,422	$ 17,606	$ 89,433	$ 41,157
Average number of common shares outstanding (in shares)	29,714	29,764	29,720	29,971
Effect of dilutive stock options and restricted stock (in shares)	137	80	167	112
Average number of common shares outstanding used to calculate diluted earnings per share (in shares)	29,851	29,844	29,887	30,083
Options excluded from diluted earnings per share because of their antidilutive effect (in shares)	0	0	0	0

Comprehensive Income (Loss) - C

Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) and Related Tax Effects (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	$ (4,440)	$ 4,957	$ (8,553)	$ 10,798
Net unrealized gain on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
OCI, before reclassifications, before tax	(6,304)	4,645	(11,249)	10,043
Reclassifications, before tax	0	(7)	0	(7)
OCI, after reclassifications, before tax	(6,304)	4,638	(11,249)	10,036
Tax effect	1,864	(1,372)	3,325	(2,967)
Other comprehensive income (loss)	(4,440)	3,266	(7,924)	7,069
Unfunded status of the supplemental retirement plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
OCI, before reclassifications, before tax	(49)	1,936	(147)	2,607
Reclassifications, before tax	49	464	147	1,393
OCI, after reclassifications, before tax	0	2,400	0	4,000
Tax effect	0	(709)	0	(1,183)
Other comprehensive income (loss)	0	1,691	0	2,817
Amortization of prior service cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassifications, before tax	(14)	(14)	(43)	(41)
Amortization of actuarial losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassifications, before tax	63	478	190	1,434
Joint beneficiary agreement liability
Accumulated Other Comprehensive Income (Loss) [Line Items]
OCI, before reclassifications, before tax	0	0	(629)	912
Tax effect	0	0	0	0
OCI, before reclassifications, net of tax	$ 0	$ 0	$ (629)	$ 912

Comprehensive Income (Loss) -_2

Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, net of tax	$ 3,727	$ 12,280
Net unrealized gain on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before tax	7,934	19,183
Accumulated other comprehensive income, tax effect	(2,346)	(5,671)
Accumulated other comprehensive income, net of tax	5,588	13,512
Unfunded status of the supplemental retirement plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before tax	(1,294)	(1,294)
Accumulated other comprehensive income, tax effect	382	382
Accumulated other comprehensive income, net of tax	(912)	(912)
Joint beneficiary agreement liability
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before tax	(949)	(320)
Accumulated other comprehensive income, tax effect	0	0
Accumulated other comprehensive income, net of tax	$ (949)	$ (320)

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021USD ($)investmentSecurity
Fair Value Disclosures [Abstract]
Number of investment securities classified as level 3 (in investment securities) | investmentSecurity	0
Carrying value of loans fully charged-off | $	$ 0

Fair Value Measurement - Record

Fair Value Measurement - Recorded Amount of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value Measurements on Recurring Basis - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 2,107,594	$ 1,428,649
Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,965	3,025
Obligations of U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,244,616	812,374
Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	168,107	129,095
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	6,796	2,544
Asset backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	676,302	470,251
Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	3,072	6,268
Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	5,736	5,092
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,965	3,025
Level 1 | Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,965	3,025
Level 1 | Obligations of U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 1 | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 1 | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 1 | Asset backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 1 | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 1 | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,098,893	1,420,532
Level 2 | Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 2 | Obligations of U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,244,616	812,374
Level 2 | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	168,107	129,095
Level 2 | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	6,796	2,544
Level 2 | Asset backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	676,302	470,251
Level 2 | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	3,072	6,268
Level 2 | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	5,736	5,092
Level 3 | Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 3 | Obligations of U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 3 | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 3 | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 3 | Asset backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 3 | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		0
Level 3 | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 5,736	$ 5,092

Fair Value Measurement - Reconc

Fair Value Measurement - Reconciliation of Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) on Recurring Basis (Detail) - Mortgage servicing rights - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 5,603	$ 4,250	$ 5,092	$ 6,200
Transfers into (out of) Level 3	0	0		0
Change Included in Earnings	(233)	236	(691)	(2,258)
Issuances	366	434	1,335	978
Ending Balance	$ 5,736	$ 4,920	$ 5,736	$ 4,920

Fair Value Measurement - Quanti

Fair Value Measurement - Quantitative Information about Recurring Level 3 Fair Value Measurements (Detail) - Mortgage servicing rights $ in Thousands	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgages servicing rights, fair value	$ 5,736	$ 5,092
Minimum | Valuation Technique, Discounted Cash Flow | Measurement Input, Constant Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.12	0.14
Minimum | Valuation Technique, Discounted Cash Flow | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.10	0.10
Maximum | Valuation Technique, Discounted Cash Flow | Measurement Input, Constant Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.17	0.20
Maximum | Valuation Technique, Discounted Cash Flow | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.14	0.14
Weighted Average | Valuation Technique, Discounted Cash Flow | Measurement Input, Constant Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.133	0.176
Weighted Average | Valuation Technique, Discounted Cash Flow | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.12	0.12

Fair Value Measurement - Assets

Fair Value Measurement - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Foreclosed assets (Residential real estate)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 447		$ 979
Individually evaluated loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,942		1,424
Fair Value Nonrecurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	3,389		2,403
Total Gains/(Losses)	(727)		(1,334)
Fair Value Nonrecurring Basis | Individually evaluated loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,942	$ 1,024	1,424
Total Gains/(Losses)	(840)	(309)	(1,489)
Fair Value Nonrecurring Basis | Foreclosed Assets | Foreclosed assets (Residential real estate)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	447		979
Total Gains/(Losses)	113		155
Fair Value Nonrecurring Basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0		0
Fair Value Nonrecurring Basis | Level 1 | Individually evaluated loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0	0
Fair Value Nonrecurring Basis | Level 1 | Foreclosed Assets | Foreclosed assets (Residential real estate)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0		0
Fair Value Nonrecurring Basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0		0
Fair Value Nonrecurring Basis | Level 2 | Individually evaluated loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0	0
Fair Value Nonrecurring Basis | Level 2 | Foreclosed Assets | Foreclosed assets (Residential real estate)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0		0
Fair Value Nonrecurring Basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	3,389		2,403
Fair Value Nonrecurring Basis | Level 3 | Individually evaluated loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,942	$ 1,024	1,424
Fair Value Nonrecurring Basis | Level 3 | Foreclosed Assets | Foreclosed assets (Residential real estate)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 447		$ 979

Fair Value Measurement - Quan_2

Fair Value Measurement - Quantitative Information about (Level 3) Fair Value Measurements for Financial Instruments Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Foreclosed assets (Residential real estate)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 447	$ 979
Individually evaluated loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 2,942	$ 1,424

Fair Value Measurement - Estima

Fair Value Measurement - Estimated Fair Values of Financial Instruments that are Reported at Amortized Cost in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financial assets:
Cash and due from banks	$ 83,188	$ 77,253
Cash at Federal Reserve and other banks	657,048	592,298
Securities held to maturity	216,979	284,563
Financial liabilities:
Other borrowings	45,601	26,914
Junior subordinated debt	57,965	57,635
Level 3 | Overdraft Privilege Commitments
Off-balance sheet:
Contract Amount	111,980	110,813
Level 3 | Standby letters of credit
Off-balance sheet:
Contract Amount	23,207	15,056
Level 3 | Commitments
Off-balance sheet:
Contract Amount	1,531,412	1,426,827
Carrying Amount | Level 1
Financial assets:
Cash and due from banks	83,188	77,253
Cash at Federal Reserve and other banks	657,048	592,298
Carrying Amount | Level 2
Financial assets:
Securities held to maturity	216,979	284,563
Restricted equity securities	17,250	17,250
Financial liabilities:
Deposits	7,236,822	6,505,934
Other borrowings	45,601	26,914
Carrying Amount | Level 3
Financial assets:
Loans, net	4,803,190	4,671,280
Financial liabilities:
Junior subordinated debt	57,965	57,635
Fair Value | Level 1
Financial assets:
Cash and due from banks	83,188	77,253
Cash at Federal Reserve and other banks	657,048	592,298
Fair Value | Level 2
Financial assets:
Securities held to maturity	228,174	298,726
Financial liabilities:
Deposits	7,243,986	6,507,235
Other borrowings	45,601	26,914
Fair Value | Level 3
Financial assets:
Loans, net	4,808,023	4,753,027
Financial liabilities:
Junior subordinated debt	57,907	56,632
Fair Value | Level 3 | Overdraft Privilege Commitments
Off-balance sheet:
Fair Value	1,119	1,108
Fair Value | Level 3 | Standby letters of credit
Off-balance sheet:
Fair Value	232	151
Fair Value | Level 3 | Commitments
Off-balance sheet:
Fair Value	$ 15,314	$ 14,268

Regulatory Matters - Actual and

Regulatory Matters - Actual and Required Capital Ratios of Bank (Detail) $ in Thousands	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Consolidated
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets)	$ 869,196	$ 793,433
Tier 1 Capital (to Risk Weighted Assets)	798,433	727,879
Common Equity Tier 1 Capital (to Risk Weighted Assets)	742,209	671,975
Tier 1 Capital (to Average Assets)	$ 798,433	$ 727,879
Total Capital Ratio (to Risk Weighted Assets)	0.1541	0.1522
Tier 1 Capital Ratio (to Risk Weighted Assets)	0.1415	0.1396
Common Equity Tier 1 Capital Ratio (to Risk Weighted Assets)	0.1315	0.1289
Tier 1 Capital Ratio (to Average Assets)	0.0985	0.0993
Consolidated | Basel III Fully Phased In
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement	$ 592,435	$ 547,352
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement	479,590	443,094
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement	394,957	364,901
Tier 1 Capital (to Average Assets), Minimum Capital Requirement	$ 324,391	$ 293,138
Total Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	0.1050	0.1050
Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	0.0850	0.0850
Common Equity Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	7.00%	7.00%
Tier 1 Capital Ratio (to Average Assets), Minimum Capital Requirement	0.0400	0.0400
Tri Counties Bank
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets)	$ 860,080	$ 780,320
Tier 1 Capital (to Risk Weighted Assets)	789,416	714,811
Common Equity Tier 1 Capital (to Risk Weighted Assets)	789,416	714,811
Tier 1 Capital (to Average Assets)	$ 789,416	$ 714,811
Total Capital Ratio (to Risk Weighted Assets)	0.1526	0.1497
Tier 1 Capital Ratio (to Risk Weighted Assets)	0.1401	0.1372
Common Equity Tier 1 Capital Ratio (to Risk Weighted Assets)	0.1401	0.1372
Tier 1 Capital Ratio (to Average Assets)	0.0974	0.0976
Total Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 563,595	$ 521,101
Capital Required to be Well Capitalized to Risk Weighted Assets	0.1000	0.1000
Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 450,876	$ 416,881
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	0.0800	0.0800
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 366,337	$ 338,716
Common Equity Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.50%	6.50%
Tier 1 Capital (to Average Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 405,317	$ 366,186
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	0.0500	0.0500
Tri Counties Bank | Basel III Fully Phased In
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement	$ 591,775	$ 547,156
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement	479,056	442,936
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement	394,517	364,771
Tier 1 Capital (to Average Assets), Minimum Capital Requirement	$ 324,254	$ 292,949
Total Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	0.1050	0.1050
Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	0.0850	0.0850
Common Equity Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	7.00%	7.00%
Tier 1 Capital Ratio (to Average Assets), Minimum Capital Requirement	0.0400	0.0400

Pending Merger - Narrative (Det

Pending Merger - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Assets	$ 8,458,030	$ 7,639,529
Valley Republic Bancorp
Subsequent Event [Line Items]
Assets	$ 1,410,000

Uncategorized Items - tcbk-2021

Label	Element	Value
Accounting Standards Update [Extensible List]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2016-13 [Member]