CVB Financial (CVBF) 10-Q 10 May 21 2021 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2021	Apr. 30, 2021
Cover [Abstract]
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0000354647
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2021
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Document Period End Date	Mar. 31, 2021
Entity Registrant Name	CVB FINANCIAL CORP.
Entity Current Reporting Status	Yes
Trading Symbol	CVBF
Title of 12(b) Security	Common Stock
Security Exchange Name	NASDAQ
Entity File Number	000-10140
Entity Incorporation, State or Country Code	CA
Entity Tax Identification Number	95-3629339
Entity Address, Address Line One	701 North Haven Ave
Entity Address, Address Line Two	Suite 350
Entity Address, City or Town	Ontario
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91764
City Area Code	909
Local Phone Number	980-4030
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		135,918,972

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 139,713	$ 122,305
Interest-earning balances due from Federal Reserve	1,385,586	1,835,855
Total cash and cash equivalents	1,525,299	1,958,160
Interest-earning balances due from depository institutions	27,748	43,563
Investment securities available-for-sale, at fair value (with amortized cost of $2,797,990 at March 31, 2021, and $2,344,174 at December 31, 2020)	2,812,348	2,398,923
Investment securities held-to-maturity (with fair value of $1,085,481 at March 31, 2021, and $604,223 at December 31, 2020)	1,086,984	578,626
Total investment securities	3,899,332	2,977,549
Investment in stock of Federal Home Loan Bank (FHLB)	17,688	17,688
Loans and lease finance receivables	8,293,057	8,348,808
Allowance for credit losses	(71,805)	(93,692)
Net loans and lease finance receivables	8,221,252	8,255,116
Premises and equipment, net	49,735	51,144
Bank owned life insurance (BOLI)	223,905	226,818
Accrued interest receivable	34,825	31,306
Intangibles	31,467	33,634
Goodwill	663,707	663,707
Other real estate owned (OREO)	1,575	3,392
Income taxes	15,372	29,540
Other assets	128,533	127,697
Total assets	14,840,438	14,419,314
Deposits:
Noninterest-bearing	7,577,839	7,455,387
Interest-bearing	4,500,816	4,281,114
Total deposits	12,078,655	11,736,501
Customer repurchase agreements	506,346	439,406
Other borrowings	5,000	5,000
Deferred compensation	22,023	21,611
Junior subordinated debentures	25,774	25,774
Payable for securities purchased	80,973	60,113
Other liabilities	101,001	122,919
Total liabilities	12,819,772	12,411,324
Stockholders' Equity
Common stock, authorized, 225,000,000 shares without par; issued and outstanding 135,919,625 at March 31, 2021, and 135,600,501 at December 31, 2020	1,213,451	1,211,780
Retained earnings	800,259	760,861
Accumulated other comprehensive income, net of tax	6,956	35,349
Total stockholders' equity	2,020,666	2,007,990
Total liabilities and stockholders' equity	$ 14,840,438	$ 14,419,314

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Amortized cost	$ 2,797,990	$ 2,344,174
Fair Value, Held-to-maturity	$ 1,085,481	$ 604,223
Common stock, par value	$ 0	$ 0
Common stock, authorized	225,000,000	225,000,000
Common stock, shares issued	135,919,625	135,600,501
Common stock, shares outstanding	135,919,625	135,600,501

Condensed Consolidated Statemen

Condensed Consolidated Statements of Earnings and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest income:
Loans and leases, including fees	$ 91,795	$ 92,117
Investment securities:
Investment securities available-for-sale	9,159	10,049
Investment securities held-to-maturity	3,940	3,998
Total investment income	13,099	14,047
Dividends from FHLB stock	217	332
Interest-earning deposits with other institutions	413	613
Total interest income	105,524	107,109
Interest expense:
Deposits	1,812	4,124
Borrowings and customer repurchase agreements	141	479
Junior subordinated debentures	103	200
Total interest expense	2,056	4,803
Net interest income before (recapture of) provision for credit losses	103,468	102,306
(Recapture of) provision for credit losses	(19,500)	12,000
Net interest income after (recapture of)  provision for credit losses	122,968	90,306
Noninterest income:
BOLI income	4,624	2,059
Gain on OREO, net	429	10
Other	1,682	1,798
Total noninterest income	13,681	11,640
Noninterest expense:
Salaries and employee benefits	29,706	30,877
Occupancy and equipment	4,863	4,837
Professional services	2,168	2,256
Computer software expense	2,844	2,816
Marketing and promotion	725	1,555
Amortization of intangible assets	2,167	2,445
Other	4,690	3,855
Total noninterest expense	47,163	48,641
Earnings before income taxes	89,486	53,305
Income taxes	25,593	15,325
Net earnings	63,893	37,980
Other comprehensive (loss) income:
Unrealized (loss) gain on securities arising during the period, before tax	(40,310)	36,618
Less: Income tax benefit (expense) related to items of other comprehensive income	11,917	(10,826)
Other comprehensive (loss) income, net of tax	(28,393)	25,792
Comprehensive income	$ 35,500	$ 63,772
Basic earnings per common share	$ 0.47	$ 0.27
Diluted earnings per common share	$ 0.47	$ 0.27
Service Charges on Deposit Accounts [Member]
Noninterest income:
Revenue from contract with customer, including assessed tax	$ 3,985	$ 4,776
Trust and Investment Services [Member]
Noninterest income:
Revenue from contract with customer, including assessed tax	2,611	2,420
Bankcard Services [Member]
Noninterest income:
Revenue from contract with customer, including assessed tax	$ 350	$ 577

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative adjustment upon adoption of ASU 2016-13 [ Member]	Common Stock [Member]	Common Stock [Member]Cumulative adjustment upon adoption of ASU 2016-13 [ Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative adjustment upon adoption of ASU 2016-13 [ Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]Cumulative adjustment upon adoption of ASU 2016-13 [ Member]
Beginning balance at Dec. 31, 2019	$ 1,994,098	$ (1,325)	$ 1,298,792	$ 0	$ 682,692	$ (1,325)	$ 12,614	$ 0
Beginning balance, shares at Dec. 31, 2019			140,102	0
Repurchase of common stock	(92,402)		$ (92,402)
Repurchase of common stock, shares			(4,988)
Exercise of stock options	42		$ 42
Exercise of stock options, shares			4
Shares issued pursuant to stock-based compensation plan	1,617		$ 1,617
Shares issued pursuant to stock-based compensation plan, shares			393
Cash dividends declared on common stock	(24,416)				(24,416)
Net earnings	37,980				37,980
Other comprehensive income (loss)	25,792						25,792
Ending balance at Mar. 31, 2020	1,941,386		$ 1,208,049		694,931		38,406
Ending balance, shares at Mar. 31, 2020			135,511
Beginning balance at Dec. 31, 2020	2,007,990		$ 1,211,780		760,861		35,349
Beginning balance, shares at Dec. 31, 2020			135,601
Repurchase of common stock	(502)		$ (502)
Repurchase of common stock, shares			(22)
Exercise of stock options	891		$ 891
Exercise of stock options, shares			40
Shares issued pursuant to stock-based compensation plan	1,282		$ 1,282
Shares issued pursuant to stock-based compensation plan, shares			301
Cash dividends declared on common stock	(24,495)				(24,495)
Net earnings	63,893				63,893
Other comprehensive income (loss)	(28,393)						(28,393)
Ending balance at Mar. 31, 2021	$ 2,020,666		$ 1,213,451		$ 800,259		$ 6,956
Ending balance, shares at Mar. 31, 2021			135,920

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends per common share	$ 0.18	$ 0.18

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities
Interest and dividends received	$ 95,475	$ 105,673
Service charges and other fees received	8,636	9,644
Interest paid	(1,859)	(4,589)
Net cash paid to vendors, employees and others	(56,221)	(35,201)
Income taxes	907	0
Net cash provided by operating activities	46,938	75,527
Cash Flows from Investing Activities
Net change in interest-earning balances from depository institutions	15,815	(20,868)
Proceeds from repayment of investment securities available-for-sale	224,104	92,519
Proceeds from maturity of investment securities available-for-sale	0	2,390
Purchases of investment securities available-for-sale	(661,857)	0
Proceeds from repayment and maturity of investment securities held-to-maturity	35,766	33,297
Purchases of investment securities held-to-maturity	(545,681)	(1,509)
Net increase in equity investments	(4,961)	(2,985)
Net decrease in loan and lease finance receivables	64,167	103,890
Proceeds from sale of building, net of selling costs	1,157	0
Purchase of premises and equipment	(662)	(882)
Proceeds from BOLI death benefit	5,062	138
Proceeds from sales of other real estate owned	2,216	0
Net cash (used in) provided by investing activities	(864,874)	205,990
Cash Flows from Financing Activities
Net increase in other deposits	336,518	403,546
Net increase in time deposits	5,636	5,130
Net increase (decrease) in customer repurchase agreements	66,940	(59,744)
Cash dividends on common stock	(24,408)	(25,252)
Repurchase of common stock	(502)	(85,018)
Proceeds from exercise of stock options	891	42
Net cash provided by financing activities	385,075	238,704
Net (decrease) increase in cash and cash equivalents	(432,861)	520,221
Cash and cash equivalents, beginning of period	1,958,160	185,518
Cash and cash equivalents, end of period	1,525,299	705,739
Reconciliation of Net Earnings to Net Cash Provided by Operating Activities
Net earnings	63,893	37,980
Adjustments to reconcile net earnings to net cash provided by operating activities:
Gain on sale of building, net	(189)	0
Gain on sale of other real estate owned	(399)	0
Increase in BOLI	(4,624)	(1,344)
Net amortization of premiums and discounts on investment securities	6,411	2,620
Accretion of discount for acquired loans, net	(4,028)	(4,776)
(Recapture of) provision for credit losses	(19,500)	12,000
Stock-based compensation	1,282	1,617
Depreciation and amortization, net	(3,526)	5,176
Change in other assets and liabilities	7,618	22,254
Total adjustments	(16,955)	37,547
Net cash provided by operating activities	46,938	75,527
Supplemental Disclosure of Non-cash Investing Activities
Securities purchased and not settled	$ 80,973	$ 0

Business

Business	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	1. BUSINESS The condensed consolidated financial statements include CVB Financial Corp. (referred to herein on an unconsolidated basis as “CVB” and on a consolidated basis and its wholly owned subsidiary: Citizens Business Bank (the “Bank” or “CBB”), after elimination of all intercompany transactions and balances. The Company has one inactive subsidiary, Chino Valley Bancorp. The Company is also the common stockholder of CVB Statutory Trust III. CVB Statutory Trust III was created in January 2006 to issue trust preferred securities in order to raise capital for the Company. In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 810, Consolidation, this trust does not meet the criteria for consolidation. The Company’s primary operations are related to traditional banking activities. This includes the acceptance of deposits and the lending and investing of money through the operations of the Bank. The Bank also provides trust and investment-related services to customers through its CitizensTrust Division. The Bank’s customers consist primarily of small to mid-sized

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	2. BASIS OF PRESENTATION The accompanying unaudited condensed consolidated financial statements and notes thereto have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”) for Form 10-Q 10-K Reclassification

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Except as discussed below, our accounting policies are described in Note 3 – Summary of Significant Accounting Policies 10-K 10-K”). Use of Estimates in the Preparation of Financial Statements

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Investment Securities	4. INVESTMENT SECURITIES The amortized cost and estimated fair value of investment securities are summarized below. The majority of securities held are available-for-sale March 31, 2021 Amortized Cost Gross Unrealized Holding Gain Gross Unrealized Holding Loss Fair Value Total Percent (Dollars in thousands) Investment securities available-for-sale: Mortgage-backed securities $ 2,175,414 $ 38,333 $ (22,409) $ 2,191,338 77.92% CMO/REMIC 592,915 4,072 (6,821) 590,166 20.99% Municipal bonds 28,703 1,183 - 29,886 1.06% Other securities 958 - - 958 0.03% Total available-for-sale $ 2,797,990 $ 43,588 $ (29,230) $ 2,812,348 100.00% Investment securities held-to-maturity: Government agency/GSE $ 601,142 $ 3,860 $ (16,289 ) $ 588,713 55.30% Mortgage-backed securities 135,137 5,348 (255 ) 140,230 12.43% CMO/REMIC 133,556 2,832 - 136,388 12.29% Municipal bonds 217,149 5,095 (2,094) 220,150 19.98% Total held-to-maturity $ 1,086,984 $ 17,135 $ (18,638) $ 1,085,481 100.00% December 31, 2020 Amortized Cost Gross Unrealized Holding Gain Gross Unrealized Holding Loss Fair Value Total Percent (Dollars in thousands) Investment securities available-for-sale: Mortgage-backed securities $ 1,857,030 $ 48,006 $ (101) $ 1,904,935 79.41% CMO/REMIC 457,548 5,515 (249) 462,814 19.29% Municipal bonds 28,707 1,578 - 30,285 1.26% Other securities 889 - - 889 0.04% Total available-for-sale $ 2,344,174 $ 55,099 $ (350) $ 2,398,923 100.00% Investment securities held-to-maturity: Government agency/GSE $ 98,663 $ 5,877 $ - $ 104,540 17.05% Mortgage-backed securities 146,382 7,644 (32) 153,994 25.30% CMO/REMIC 145,309 5,202 - 150,511 25.11% Municipal bonds 188,272 6,980 (74) 195,178 32.54% Total held-to-maturity $ 578,626 $ 25,703 $ (106) $ 604,223 100.00% The following table provides information about the amount of interest income earned on investment securities which is fully taxable and which is exempt from regular federal income tax. Three Months Ended March 31, 2021 2020 (Dollars in thousands) Investment securities available-for-sale: Taxable $ 8,968 $ 9,825 Tax-advantaged 191 224 Total interest income from available-for-sale 9,159 10,049 Investment securities held-to-maturity: Taxable 2,811 2,698 Tax-advantaged 1,129 1,300 Total interest income from held-to-maturity 3,940 3,998 Total interest income from investment securities $ 13,099 $ 14,047 The adoption of CECL did not have a material impact on the accounting for investment securities, as approximately 94% of the total investment securities portfolio at March 31, 2021 represents securities issued by the U.S. government or U.S. government-sponsored enterprises, with the implied guarantee of payment of principal and interest. The remaining securities are predominately AA- held-to-maturity We adopted ASU 2016-13 The following table presents the Company’s available-for-sale March 31, 2021 Less Than 12 Months 12 Months or Longer Total Fair Value Gross Fair Value Gross Fair Value Gross (Dollars in thousands) Investment securities available-for-sale: Mortgage-backed securities $ 1,327,126 $ (22,409 ) $ - $ - $ 1,327,126 $ (22,409 ) CMO/REMIC 422,765 (6,821 ) - - 422,765 (6,821 ) Municipal bonds - - - - - - Total available-for-sale $ 1,749,891 $ (29,230 ) $ - $ - $ 1,749,891 $ (29,230 ) December 31, 2020 Less Than 12 Months 12 Months or Longer Total Fair Value Gross Fair Value Gross Fair Gross (Dollars in thousands) Investment securities available-for-sale: Mortgage-backed securities $ 72,219 $ (101 ) $ - $ - $ 72,219 $ (101 ) CMO/REMIC 96,974 (249 ) - - 96,974 (249 ) Municipal bonds - - - - - - Total available-for-sale $ 169,193 $ (350 ) $ - $ - $ 169,193 $ (350 ) At March 31, 2021 and December 31, 2020, investment securities having a carrying value of approximately $1.92 billion and $1.81 billion, respectively, were pledged to secure public deposits, short and long-term borrowings, and for other purposes as required or permitted by law. The amortized cost and fair value of debt securities at March 31, 2021, by contractual maturity, are shown in the table below. Although mortgage-backed and CMO/REMIC securities have weighted average remaining contractual maturities of approximately 19 years, expected maturities will differ from contractual maturities because borrowers may have the right to prepay such obligations without penalty. Mortgage-backed and CMO/REMIC securities are included in maturity categories based upon estimated average lives which incorporate estimated prepayment speeds. March 31, 2021 Available-for-sale Held-to-maturity Amortized Fair Value Amortized Fair Value (Dollars in thousands) Due in one year or less $ 4,821 $ 4,920 $ 4,054 $ 4,086 Due after one year through five years 2,368,827 2,383,641 280,057 288,032 Due after five years through ten years 393,699 392,160 133,106 134,081 Due after ten years 30,643 31,627 669,767 659,282 Total investment securities $ 2,797,990 $ 2,812,348 $ 1,086,984 $ 1,085,481 The investment in FHLB stock is periodically evaluated for impairment based on, among other things, the capital adequacy of the FHLB and its overall financial condition. No

Loans and Lease Finance Receiva

Loans and Lease Finance Receivables and Allowance for Credit Losses	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Loans and Lease Finance Receivables and Allowance for Credit Losses	5. LOANS AND LEASE FINANCE RECEIVABLES AND ALLOWANCE FOR CREDIT LOSSES The following table provides a summary of total loans and lease finance receivables by type. March 31, 2021 December 31, 2020 (Dollars in thousands) Commercial real estate $ 5,596,781 $ 5,501,509 Construction 96,356 85,145 SBA 307,727 303,896 SBA - Paycheck Protection Program (PPP) 897,724 882,986 Commercial and industrial 753,708 812,062 Dairy & livestock and agribusiness 261,088 361,146 Municipal lease finance receivables 42,349 45,547 SFR mortgage 255,400 270,511 Consumer and other loans 81,924 86,006 Total loans, at amortized cost 8,293,057 8,348,808 Less: Allowance for credit losses (71,805 ) (93,692 ) Total loans and lease finance receivables, net $ 8,221,252 $ 8,255,116 As of March 31, 2021, 71.73% of the Company’s total loan portfolio consisted of real estate loans, with commercial real estate loans representing 67.49% of total loans. Substantially all of the Company’s real estate loans and construction loans are secured by real properties located in California. As of March 31, 2021, $327.4 million, or 5.85% of the total commercial real estate loans included loans secured by farmland, compared to $314.4 million, or 5.72%, at December 31, 2020. The loans secured by farmland included $129.2 million for loans secured by dairy & livestock land and $198.1 million for loans secured by agricultural land at March 31, 2021, compared to $132.9 million for loans secured by dairy & livestock land and $181.5 million for loans secured by agricultural land at December 31, 2020. As of March 31, 2021, dairy & livestock and agribusiness loans of $261.1 million were comprised of $229.1 million for dairy & livestock loans and $31.9 million for agribusiness loans, compared to $320.1 million for dairy & livestock loans and $41.0 million for agribusiness loans at December 31, 2020. At March 31, 2021 and December 31, 2020, loans totaling $6.07 billion and $6.07 billion, respectively, were pledged to secure the borrowings and available lines of credit from the FHLB and the Federal Reserve Bank. There were no held-for-sale Credit Quality Indicators We monitor credit quality by evaluating various risk attributes and utilize such information in our evaluation of the appropriateness of the allowance for credit losses. Internal credit risk ratings, within our loan risk rating system, are the credit quality indicators that we most closely monitor. An important element of our approach to credit risk management is our loan risk rating system. The originating officer assigns each loan an initial risk rating, which is reviewed and confirmed or changed, as appropriate, by credit management. Approvals are made based upon the amount of inherent credit risk specific to the transaction and are reviewed for appropriateness by senior line and credit management personnel. Credits are monitored by line and credit management personnel for deterioration or improvement in a borrower’s financial condition, which would impact the ability of the borrower to perform under the contract. Risk ratings are adjusted as necessary. Loans are risk rated into the following categories: Pass, Special Mention, Substandard, Doubtful and Loss. Each of these groups is assessed for the proper amount to be used in determining the adequacy of our allowance for losses. These categories can be described as follows: Pass — These loans, including loans on the Bank’s internal watch list, range from minimal credit risk to lower than average, but still acceptable, credit risk. Watch list loans usually require more than normal management attention. Loans on the watch list may involve borrowers with adverse financial trends, higher debt/equity ratios, or weaker liquidity positions, but not to the degree of being considered a defined weakness or problem loan where risk of loss may be apparent. Special Mention — Loans assigned to this category have potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in the deterioration of the repayment prospects for the asset or the Company’s credit position at some future date. Special mention assets are not adversely classified and do not expose the Company to sufficient risk to warrant adverse classification. Substandard — Loans classified as substandard are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Assets so classified must have a well-defined weakness, or weaknesses, that jeopardize the liquidation of the debt. Substandard loans are characterized by the distinct possibility that the Company will sustain some loss if deficiencies are not corrected. Doubtful — Loans classified as doubtful have all the weaknesses inherent in those classified substandard with the added characteristic that the weaknesses make collection or the liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. Loss — Loans classified as loss are considered uncollectible and of such little value that their continuance as bankable assets 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 this asset with insignificant value even though partial recovery may be affected in the future. The following table summarizes loans by type and origination year, according to our internal risk ratings as of the dates presented. Origination Year Revolving loans cost basis Revolving loans converted to term loans March 31, 2021 2021 2020 2019 2018 2017 Prior Total (Dollars in thousands) Commercial real estate loans: Risk Rating: Pass $ 282,950 $ 981,750 $ 678,640 $ 588,405 $ 569,006 $ 2,063,996 $ 180,542 $ 35,794 $ 5,381,083 Special Mention 10,420 9,254 11,441 25,826 50,811 66,570 4,609 9,890 188,821 Substandard - - 479 2,156 9,064 14,347 500 331 26,877 Doubtful & Loss - - - - - - - - - Total Commercial real estate loans: $ 293,370 $ 991,004 $ 690,560 $ 616,387 $ 628,881 $ 2,144,913 $ 185,651 $ 46,015 $ 5,596,781 Construction loans: Risk Rating: Pass $ 876 $ 19,034 $ 7,974 $ 6,380 $ 2,257 $ 4 $ 52,058 $ - $ 88,583 Special Mention - - - 7,773 - - - - 7,773 Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Construction loans: $ 876 $ 19,034 $ 7,974 $ 14,153 $ 2,257 $ 4 $ 52,058 $ - $ 96,356 SBA loans: Risk Rating: Pass $ 20,599 $ 44,593 $ 12,742 $ 43,163 $ 55,759 $ 104,385 $ - $ 2,976 $ 284,217 Special Mention - - - - 5,408 6,864 - - 12,272 Substandard - - - 876 5,145 5,217 - - 11,238 Doubtful & Loss - - - - - - - - - Total SBA loans: $ 20,599 $ 44,593 $ 12,742 $ 44,039 $ 66,312 $ 116,466 $ - $ 2,976 $ 307,727 SBA - PPP loans: Risk Rating: Pass $ 314,940 $ 581,281 $ - $ - $ - $ - $ - $ - $ 896,221 Special Mention - - - - - - - - - Substandard - 1,503 - - - - - - 1,503 Doubtful & Loss - - - - - - - - - Total SBA - PPP loans: $ 314,940 $ 582,784 $ - $ - $ - $ - $ - $ - $ 897,724 Commercial and industrial loans: Risk Rating: Pass $ 31,474 $ 100,585 $ 147,772 $ 59,414 $ 50,335 $ 97,792 $ 219,271 $ 6,303 $ 712,946 Special Mention 486 1,781 1,881 1,732 856 4,798 10,485 247 22,266 Substandard 2,643 1,611 808 3,467 2,039 355 6,183 1,390 18,496 Doubtful & Loss - - - - - - - - - Total Commercial and industrial $ 34,603 $ 103,977 $ 150,461 $ 64,613 $ 53,230 $ 102,945 $ 235,939 $ 7,940 $ 753,708 Origination Year Revolving loans cost basis Revolving loans converted to term loans March 31, 2021 2021 2020 2019 2018 2017 Prior Total (Dollars in thousands) Dairy & livestock and agribusiness Risk Rating: Pass $ - $ 2,216 $ 1,660 $ 1,102 $ 256 $ 391 $ 227,667 $ 387 $ 233,679 Special Mention - - - 347 - 1,684 11,029 7,342 20,402 Substandard - - - 259 - - - 6,748 7,007 Doubtful & Loss - - - - - - - - - Total Dairy & livestock and $ - $ 2,216 $ 1,660 $ 1,708 $ 256 $ 2,075 $ 238,696 $ 14,477 $ 261,088 Municipal lease finance receivables loans: Risk Rating: Pass $ - $ 8,217 $ - $ 2,556 $ 10,248 $ 20,916 $ - $ - $ 41,937 Special Mention - - - - - 412 - - 412 Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Municipal lease finance $ - $ 8,217 $ - $ 2,556 $ 10,248 $ 21,328 $ - $ - $ 42,349 SFR mortgage loans: Risk Rating: Pass $ 7,745 $ 61,021 $ 53,148 $ 27,117 $ 20,857 $ 81,721 $ 2 $ - $ 251,611 Special Mention - - - - - 195 - - 195 Substandard - - - - - 3,168 - 426 3,594 Doubtful & Loss - - - - - - - - - Total SFR mortgage loans: $ 7,745 $ 61,021 $ 53,148 $ 27,117 $ 20,857 $ 85,084 $ 2 $ 426 $ 255,400 Consumer and other loans: Risk Rating: Pass $ 2,618 $ 7,558 $ 1,833 $ 778 $ 878 $ 2,157 $ 61,735 $ 1,791 $ 79,348 Special Mention 975 - - - - 90 516 - 1,581 Substandard - - - - - 170 149 676 995 Doubtful & Loss - - - - - - - - - Total Consumer and other loans: $ 3,593 $ 7,558 $ 1,833 $ 778 $ 878 $ 2,417 $ 62,400 $ 2,467 $ 81,924 Total Loans: Risk Rating: Pass $ 661,202 $ 1,806,255 $ 903,769 $ 728,915 $ 709,596 $ 2,371,362 $ 741,275 $ 47,251 $ 7,969,625 Special Mention 11,881 11,035 13,322 35,678 57,075 80,613 26,639 17,479 253,722 Substandard 2,643 3,114 1,287 6,758 16,248 23,257 6,832 9,571 69,710 Doubtful & Loss - - - - - - - - - Total Loans: $ 675,726 $ 1,820,404 $ 918,378 $ 771,351 $ 782,919 $ 2,475,232 $ 774,746 $ 74,301 $ 8,293,057 Origination Year Revolving loans cost basis Revolving loans converted to term loans December 31, 2020 2020 2019 2018 2017 2016 Prior Total (Dollars in thousands) Commercial real estate loans: Risk Rating: Pass $ 979,499 $ 691,091 $ 607,753 $ 617,640 $ 550,105 $ 1,646,876 $ 192,583 $ 24,548 $ 5,310,095 Special Mention 9,332 7,162 30,049 43,870 17,398 49,840 5,720 994 164,365 Substandard - 491 2,157 7,382 2,528 13,790 360 341 27,049 Doubtful & Loss - - - - - - - - - Total Commercial real estate loans: $ 988,831 $ 698,744 $ 639,959 $ 668,892 $ 570,031 $ 1,710,506 $ 198,663 $ 25,883 $ 5,501,509 Construction loans: Risk Rating: Pass $ 14,511 $ 9,350 $ 14,945 $ 2,258 $ - $ 4 $ 44,077 $ - $ 85,145 Special Mention - - - - - - - - - Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Construction loans: $ 14,511 $ 9,350 $ 14,945 $ 2,258 $ - $ 4 $ 44,077 $ - $ 85,145 SBA loans: Risk Rating: Pass $ 47,901 $ 12,821 $ 44,950 $ 58,839 $ 26,136 $ 86,085 $ - $ 2,976 $ 279,708 Special Mention - - - 5,446 1,336 5,648 - - 12,430 Substandard - - 904 5,503 1,554 3,797 - - 11,758 Doubtful & Loss - - - - - - - - - Total SBA loans: $ 47,901 $ 12,821 $ 45,854 $ 69,788 $ 29,026 $ 95,530 $ - $ 2,976 $ 303,896 SBA - PPP loans: Risk Rating: Pass $ 882,986 $ - $ - $ - $ - $ - $ - $ - $ 882,986 Special Mention - - - - - - - - - Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total SBA - PPP loans: $ 882,986 $ - $ - $ - $ - $ - $ - $ - $ 882,986 Commercial and industrial loans: Risk Rating: Pass $ 104,478 $ 168,050 $ 62,453 $ 56,043 $ 32,149 $ 76,019 $ 257,250 $ 6,058 $ 762,500 Special Mention 1,995 1,081 1,892 1,028 95 4,882 17,395 1,132 29,500 Substandard 4,346 860 3,996 2,282 285 94 6,677 1,522 20,062 Doubtful & Loss - - - - - - - - - Total Commercial and industrial loans: $ 110,819 $ 169,991 $ 68,341 $ 59,353 $ 32,529 $ 80,995 $ 281,322 $ 8,712 $ 812,062 Origination Year Revolving loans cost basis Revolving loans converted to term loans December 31, 2020 2020 2019 2018 2017 2016 Prior Total (Dollars in thousands) Dairy & livestock and agribusiness loans: Risk Rating: Pass $ 1,041 $ 1,765 $ 1,199 $ 5,680 $ 120 $ 320 $ 319,211 $ 363 $ 329,699 Special Mention 878 - 364 - - - 13,255 1,511 16,008 Substandard - - 784 693 2,285 - - 11,677 15,439 Doubtful & Loss - - - - - - - - - Total Dairy & livestock and agribusiness loans: $ 1,919 $ 1,765 $ 2,347 $ 6,373 $ 2,405 $ 320 $ 332,466 $ 13,551 $ 361,146 Municipal lease finance receivables loans: Risk Rating: Pass $ 8,478 $ - $ 2,556 $ 10,249 $ 3,586 $ 20,266 $ - $ - $ 45,135 Special Mention - - - - - 412 - - 412 Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Municipal lease finance receivables loans: $ 8,478 $ - $ 2,556 $ 10,249 $ 3,586 $ 20,678 $ - $ - $ 45,547 SFR mortgage loans: Risk Rating: Pass $ 65,463 $ 59,596 $ 29,142 $ 22,452 $ 27,192 $ 62,593 $ 3 $ - $ 266,441 Special Mention - - - - - 452 - - 452 Substandard - - - - 229 2,957 - 432 3,618 Doubtful & Loss - - - - - - - - - Total SFR mortgage loans: $ 65,463 $ 59,596 $ 29,142 $ 22,452 $ 27,421 $ 66,002 $ 3 $ 432 $ 270,511 Consumer and other loans: Risk Rating: Pass $ 8,557 $ 2,077 $ 871 $ 969 $ 1,586 $ 961 $ 67,774 $ 1,688 $ 84,483 Special Mention - - - - - 91 517 22 630 Substandard - - - - - 172 - 721 893 Doubtful & Loss - - - - - - - - - Total Consumer and other loans: $ 8,557 $ 2,077 $ 871 $ 969 $ 1,586 $ 1,224 $ 68,291 $ 2,431 $ 86,006 Total Loans: Risk Rating: Pass $ 2,112,914 $ 944,750 $ 763,869 $ 774,130 $ 640,874 $ 1,893,124 $ 880,898 $ 35,633 $ 8,046,192 Special Mention 12,205 8,243 32,305 50,344 18,829 61,325 36,887 3,659 223,797 Substandard 4,346 1,351 7,841 15,860 6,881 20,810 7,037 14,693 78,819 Doubtful & Loss - - - - - - - - - Total Loans: $ 2,129,465 $ 954,344 $ 804,015 $ 840,334 $ 666,584 $ 1,975,259 $ 924,822 $ 53,985 $ 8,348,808 Allowance for Credit Losses Our allowance for credit losses is based upon lifetime loss rate models developed from an estimation framework that uses historical lifetime loss experiences to derive loss rates at a collective pool level. We measure the expected credit losses on a collective (pooled) basis for those loans that share similar risk characteristics. We have three collective loan pools: Commercial Real Estate, Commercial and Industrial, and Consumer. Our ACL amounts are largely driven by portfolio characteristics, including loss history and various risk attributes, and the economic outlook for certain macroeconomic variables. Risk attributes for commercial real estate loans include OLTV, origination year, loan seasoning, and macroeconomic variables that include GDP growth, commercial real estate price index and unemployment rate. Risk attributes for commercial and industrial loans include internal risk ratings, borrower industry sector, loan credit spreads and macroeconomic variables that include unemployment rate and BBB spread. The macroeconomic variables for Consumer include unemployment rate and GDP. The Commercial Real Estate methodology is applied over commercial real estate loans, a portion of construction loans, and a portion of SBA loans (excluding Payment Protection Program loans). The Commercial and Industrial methodology is applied over a substantial portion of the Company’s commercial and industrial loans, all dairy & livestock and agribusiness loans, municipal lease receivables, as well as the remaining portion of SBA loans (excluding Payment Protection Program loans). The Consumer methodology is applied to SFR mortgage loans, consumer loans, as well as the remaining construction loans. In addition to determining the quantitative life of loan loss rate to be applied against the amortized cost basis of the portfolio segments, management reviews current conditions and forecasts to determine whether adjustments are needed to ensure that the life of loan loss rates reflect both the current state of the portfolio, and expectations for macroeconomic changes. Our methodology for assessing the appropriateness of the allowance is reviewed on a regular basis and considers overall risks in the Bank’s loan portfolio. Refer to Note 3 – Summary of Significant Accounting Policies contained herein for a more detailed discussion concerning the allowance for credit losses. Our allowance for credit losses at March 31, 2021 decreased from the prior quarter end by $21.9 million, as a result of a $19.5 million recapture of provision for credit losses and net charge-offs of $2.4 million. The recapture of provision for credit losses was primarily due to the forecasted improvements in macroeconomic variables, with the greatest impact reflected in an $18.9 million decline in the ACL for Commercial Real Estate loans. During the first quarter of 2020, we recorded a provision for credit losses of $12.0 million, due to the initial forecast of a severe economic downturn from the COVID-19 Management believes that the ACL was appropriate at March 31, 2021 and December 31, 2020. As there is a high degree of uncertainty around the epidemiological assumptions and impact of government responses to the pandemic that impact our economic forecast, no assurance can be given that economic conditions that adversely affect the Company’s service areas or other circumstances will not be reflected in increased provisions for credit losses in the future. The following tables present the balance and activity related to the allowance for credit losses for held-for-investment Three Months Ended March 31, 2021 Ending Balance Charge-offs Recoveries (Recapture of) Ending Balance (Dollars in thousands) Commercial real estate $ 75,439 $ - $ - $ (18,867 ) $ 56,572 Construction 1,934 - 3 (59 ) 1,878 SBA 2,992 - 4 (484 ) 2,512 SBA - PPP - - - - - Commercial and industrial 7,142 (2,475 ) 2 1,770 6,439 Dairy & livestock and agribusiness 3,949 - - (1,227 ) 2,722 Municipal lease finance receivables 74 - - (39 ) 35 SFR mortgage 367 - 79 (148 ) 298 Consumer and other loans 1,795 - - (446 ) 1,349 Total allowance for credit losses $ 93,692 $ (2,475 ) $ 88 $ (19,500 ) $ 71,805 Three Months Ended March 31, 2020 Ending Balance, prior to adoption of ASU 2016-13 December 31, 2019 Impact of Adoption of ASU 2016-13 Charge-offs Recoveries Provision for (Recapture of) Credit Losses Ending Balance March 31, 2020 (Dollars in thousands) Commercial real estate $48,629 $ 3,547 $ - $ - $ 6,251 $ 58,427 Construction 858 655 - 3 3,116 4,632 SBA 1,453 1,818 - - 675 3,946 Commercial and industrial 8,880 (2,442 ) - 2 2,947 9,387 Dairy & livestock and agribusiness 5,255 (186 ) - - (803 ) 4,266 Municipal lease finance receivables 623 (416 ) - - 70 277 SFR mortgage 2,339 (2,043 ) - 206 (221 ) 281 Consumer and other loans 623 907 (86 ) 16 (35 ) 1,425 Total allowance for credit losses $68,660 $ 1,840 $ (86 ) $ 227 $ 12,000 $ 82,641 Past Due and Nonperforming Loans We seek to manage asset quality and control credit risk through diversification of the loan portfolio and the application of policies designed to promote sound underwriting and loan monitoring practices. The Bank’s Credit Management Division is in charge of monitoring asset quality, establishing credit policies and procedures and enforcing the consistent application of these policies and procedures across the Bank. Reviews of nonperforming, past due loans and larger credits, designed to identify potential charges to the allowance for credit losses, are conducted on an ongoing basis. These reviews consider such factors as the financial strength of borrowers and any guarantors, the value of the applicable collateral, loan loss experience, estimated credit losses, growth in the loan portfolio, prevailing economic conditions and other factors. Refer to Note 3 – Summary of Significant Accounting Policies 10-K The following table presents the recorded investment in, and the aging of, past due loans (including nonaccrual loans), by type of loans as of the dates presented. March 31, 2021 30-59 Days 60-89 Days Greater than 89 Total Loans Not Total Loans (Dollars in thousands) Commercial real estate Owner occupied $ - $ 211 $ 6,934 $ 7,145 $ 2,165,178 $ 2,172,323 Non-owner 178 - - 178 3,424,280 3,424,458 Construction Speculative (1) - - - - 80,857 80,857 Non-speculative - - - - 15,499 15,499 SBA 258 - 1,028 1,286 306,441 307,727 SBA - PPP - - - - 897,724 897,724 Commercial and industrial 452 689 2,606 3,747 749,961 753,708 Dairy & livestock and agribusiness - - 259 259 260,829 261,088 Municipal lease finance receivables - - - - 42,349 42,349 SFR mortgage 266 - 229 495 254,905 255,400 Consumer and other loans 21 - 193 214 81,710 81,924 Total loans $ 1,175 $ 900 $ 11,249 $ 13,324 $ 8,279,733 $ 8,293,057 (1) Speculative construction loans are generally for properties where there is no identified buyer or renter. December 31, 2020 30-59 Days 60-89 Days Greater than 89 Total Loans Not Total Loans (Dollars in thousands) Commercial real estate Owner occupied $ - $ - $ 7,208 $ 7,208 $ 2,136,051 $ 2,143,259 Non-owner - - - - 3,358,250 3,358,250 Construction Speculative (1) - - - - 72,126 72,126 Non-speculative - - - - 13,019 13,019 SBA 531 2,415 1,025 3,971 299,925 303,896 SBA - PPP - - - - 882,986 882,986 Commercial and industrial 608 811 2,338 3,757 808,305 812,062 Dairy & livestock and agribusiness - - 784 784 360,362 361,146 Municipal lease finance receivables - - - - 45,547 45,547 SFR mortgage - - 229 229 270,282 270,511 Consumer and other loans - - - - 86,006 86,006 Total loans $ 1,139 $ 3,226 $ 11,584 $ 15,949 $ 8,332,859 $ 8,348,808 (1) Speculative construction loans are generally for properties where there is no identified buyer or renter. Amortized cost of our finance receivables and loans that are on nonaccrual status, including loans with no allowance are presented as of March 31, 2021 and December 31, 2020 by type of loan. March 31, 2021 Nonaccrual Total Loans Past (Dollars in thousands) Commercial real estate Owner occupied $ 7,395 $ 7,395 $ - Non-owner - - - Construction Speculative (2) - - - Non-speculative - - - SBA 2,076 2,412 - SBA - PPP - - - Commercial and industrial 1,506 2,967 - Dairy & livestock and agribusiness - 259 - Municipal lease finance receivables - - - SFR mortgage 424 424 - Consumer and other loans 312 312 - Total loans $ 11,713 $ 13,769 $ - (1) As of March 31, 2021, $2.1 million of nonaccruing loans were current, $400,000 were 60-89 (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. December 31, 2020 Nonaccrual Total Loans Past (Dollars in thousands) Commercial real estate Owner occupied $ 7,563 $ 7,563 $ - Non-owner - - - Construction Speculative (2) - - - Non-speculative - - - SBA 2,035 2,273 - SBA - PPP - - - Commercial and industrial 1,576 3,129 - Dairy & livestock and agribusiness 785 785 - Municipal lease finance receivables 430 - - SFR mortgage - 430 - Consumer and other loans 167 167 - Total loans $ 12,556 $ 14,347 $ - (1) As of December 31, 2020, $1.4 million of nonaccruing loans were current, $2,000 were 30-59 60-89 (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. (3) Excludes $184,000 of guaranteed portion of nonaccrual SBA loans that are in process of collection. Collateral Dependent Loans A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. The following table presents the recorded investment in collateral-dependent loans by type of loans as of the dates presented. March 31, 2021 Number of Dependent on Collateral Real Estate Business Assets Other (Dollars in thousands) Commercial real estate $ 7,689 $ - $ - 8 Construction - - - 11 SBA 1,826 418 168 - SBA - PPP - - - - Commercial and industrial 421 7,708 143 21 Dairy & livestock and agribusiness - 259 - 1 Municipal lease finance receivables - - - - SFR mortgage 424 - - 2 Consumer and other loans 312 - - 3 Total collateral-dependent loans $ 10,672 $ 8,385 $ 311 46 December 31, 2020 Number of Dependent on Collateral Real Estate Business Assets Other (Dollars in thousands) Commercial real estate $ 7,883 $ - $ - 8 Construction - - - - SBA 1,761 326 185 10 SBA - PPP - - - - Commercial and industrial 470 5,542 95 18 Dairy & livestock and agribusiness - 785 - 1 Municipal lease finance receivables - - - - SFR mortgage 430 - - 2 Consumer and other loans 168 - - 2 Total collateral-dependent loans $ 10,712 $ 6,653 $ 280 41 Reserve for Unfunded Loan Commitments The allowance for off-balance off-balance Troubled Debt Restructurings (“TDRs”) Loans that are reported as TDRs are considered impaired and charge-off Summary of Significant Accounting Policies, 10-K As of March 31, 2021, there were $5.8 million of loans classified as a TDR, all of which were performing. TDRs on accrual status are comprised of loans that were accruing interest at the time of restructuring or have demonstrated repayment performance in compliance with the restructured terms for a sustained period and for which the Company anticipates full repayment of both principal and interest. At March 31, 2021, performing TDRs were comprised of three commercial and industrial loans of $4.5 million, five SFR mortgage loans of $1.0 million, and one commercial real estate loan of $294,000. The majority of TDRs have no specific allowance allocated as any impairment amount is normally charged off at the time the loan is considered uncollectible. We have no The following table provides a summary of the activity related to TDRs for the periods presented. Three Months Ended March 31, 2021 2020 (Dollars in thousands) Performing TDRs: Beginning balance $ 2,159 $ 3,112 New modifications 4,643 - Payoffs/payments, net and other (989 ) (299 ) TDRs returned to accrual status - - TDRs placed on nonaccrual status - - Ending balance $ 5,813 $ 2,813 Nonperforming TDRs: Beginning balance $ - $ 244 New modifications - - Charge-offs - - Payoffs/payments, net and other - (244 ) TDRs returned to accrual status - - TDRs placed on nonaccrual status - - Ending balance $ - $ - Total TDRs $ 5,813 $ 2,813 The following table summarizes loans modified as TDRs for the period presented. Modifications (1) For the Three Months Ended March 31, 2021 Number of Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial real estate: Interest rate reduction - $ - $ - $ - $ - - - - - - Commercial and industrial: Interest rate reduction - - - - - Change in amortization 2 4,643 4,643 4,443 - SFR mortgage: Interest rate reduction - - - - - - - - - - Total loans 2 $ 4,643 $ 4,643 $ 4,443 $ - (1) The tables above exclude modified loans that were paid off prior to the end of the period. (2) Financial effects resulting from modifications represent charge-offs and current allowance for credit losses at modification date. As of March 31, 2021 and 2020, there were no loans that were modified as a TDR within the previous 12 months that subsequently defaulted during the three months ended March 31, 2021 and 2020, respectively.

Earnings Per Share Reconciliati

Earnings Per Share Reconciliation	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share Reconciliation	6. EARNINGS PER SHARE RECONCILIATION Basic earnings per common share are computed by dividing income allocated to common stockholders by the weighted-average number of common shares outstanding during each period. The computation of diluted earnings per common share considers the number of shares issuable upon the assumed exercise of outstanding common stock options. Antidilutive common shares are not included in the calculation of diluted earnings per common share. For the three months ended March 31, 2021 and 2020, shares deemed to be antidilutive, and thus excluded from the computation of earnings per common share, were 117,000 and 269,000, respectively. The table below shows earnings per common share and diluted earnings per common share, and reconciles the numerator and denominator of both earnings per common share calculations. Three Months Ended 2021 2020 (In thousands, except per share amounts) Earnings per common share: Net earnings $ 63,893 $ 37,980 Less: Net earnings allocated to restricted stock 309 83 Net earnings allocated to common shareholders $ 63,584 $ 37,897 Weighted average shares outstanding 135,175 139,107 Basic earnings per common share $ 0.47 $ 0.27 Diluted earnings per common share: Net income allocated to common shareholders 63,584 37,897 Weighted average shares outstanding 135,175 139,107 Incremental shares from assumed exercise of outstanding options 253 209 Diluted weighted average shares outstanding 135,428 139,316 Diluted earnings per common share $ 0.47 $ 0.27

Fair Value Information

Fair Value Information	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Information	7. FAIR VALUE INFORMATION Fair Value Hierarchy Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The valuation methodologies for financial assets and liabilities measured at fair value on a recurring and non-recurring Fair Value Information, 10-K Assets and Liabilities Measured at Fair Value on a Recurring Basis The tables below present the balances of assets and liabilities measured at fair value on a recurring basis as of the dates presented. Carrying Value at Quoted Prices in (Level 1) Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Mortgage-backed securities $ 2,191,338 $ - $ 2,191,338 $ - CMO/REMIC 590,166 - 590,166 - Municipal bonds 29,886 - 29,886 - Other securities 958 - 958 - Total investment securities - AFS 2,812,348 - 2,812,348 - Interest rate swaps 14,692 - 14,692 - Total assets $ 2,827,040 $ - $ 2,827,040 $ - Description of liability Interest rate swaps $ 14,692 $ - $ 14,692 $ - Total liabilities $ 14,692 $ - $ 14,692 $ - Carrying Value at Quoted Prices in (Level 1) Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Mortgage-backed securities $ 1,904,935 $ - $ 1,904,935 $ - CMO/REMIC 462,814 - 462,814 - Municipal bonds 30,285 - 30,285 - Other securities 889 - 889 - Total investment securities - AFS 2,398,923 - 2,398,923 - Interest rate swaps 30,181 - 30,181 - Total assets $ 2,429,104 $ - $ 2,429,104 $ - Description of liability Interest rate swaps $ 30,181 $ - $ 30,181 $ - Total liabilities $ 30,181 $ - $ 30,181 $ - Assets and Liabilities Measured at Fair Value on a Non-Recurring We may be required to measure certain assets at fair value on a non-recurring For assets measured at fair value on a non-recurring Carrying Value at Quoted Prices in Significant Other Significant Total Losses (Dollars in thousands) Description of assets Loans: Commercial real estate $ - $ - $ - $ - $ - Construction - - - - - SBA 97 - - 97 19 Commercial and industrial 2,248 - - 2,248 307 Dairy & livestock and agribusiness 260 - - 260 102 Municipal lease finance receivables - - - - - SFR mortgage - - - - - Consumer and other loans - - - - - Other real estate owned - - - - - Asset held-for-sale - - - - - Total assets $ 2,605 $ - $ - $ 2,605 $ 428 Carrying Value at Quoted Prices in Significant Other Significant Total Losses For (Dollars in thousands) Description of assets Loans: Commercial real estate $ - $ - $ - $ - $ - Construction - - - - - SBA 76 - - 76 24 Commercial and industrial 4,266 - - 4,266 2,316 Dairy & livestock and agribusiness - - - - - Municipal lease finance receivables - - - - - SFR mortgage - - - - - Consumer and other loans - - - - - Other real estate owned 2,275 - - 2,275 700 Asset held-for-sale - - - - - Total assets $ 6,617 $ - $ - $ 6,617 $ 3,040 Fair Value of Financial Instruments The following disclosure presents estimated fair value of our financial instruments. The estimated fair value amounts have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to develop the estimates of fair value. Accordingly, the estimates presented below are not necessarily indicative of the amounts the Company may realize in a current market exchange as of March 31, 2021 and December 31, 2020, respectively. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. March 31, 2021 Estimated Fair Value Carrying Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 1,525,299 $ 1,525,299 $ - $ - $ 1,525,299 Interest-earning balances due from depository institutions 27,748 - 27,748 - 27,748 Investment securities available-for-sale 2,812,348 - 2,812,348 - 2,812,348 Investment securities held-to-maturity 1,086,984 - 1,085,481 - 1,085,481 Total loans, net of allowance for credit losses 8,221,252 - - 8,231,707 8,231,707 Swaps 14,692 - 14,692 - 14,692 Liabilities Deposits: Interest-bearing $ 4,500,816 $ - $ 4,500,611 $ - $ 4,500,611 Borrowings 511,346 - 504,563 - 504,563 Junior subordinated debentures 25,774 - - 20,351 20,351 Swaps 14,692 - 14,692 - 14,692 December 31, 2020 Estimated Fair Value Carrying Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 1,958,160 $ 1,958,160 $ - $ - $ 1,958,160 Interest-earning balances due from depository institutions 43,563 - 43,600 - 43,600 Investment securities available-for-sale 2,398,923 - 2,398,923 - 2,398,923 Investment securities held-to-maturity 578,626 - 604,223 - 604,223 Total loans, net of allowance for credit losses 8,255,116 - - 8,256,178 8,256,178 Swaps 30,181 - 30,181 - 30,181 Liabilities Deposits: Interest-bearing $ 4,281,114 $ - $ 4,281,952 $ - $ 4,281,952 Borrowings 444,406 - 444,349 - 444,349 Junior subordinated debentures 25,774 - - 19,431 19,431 Swaps 30,181 - 30,181 - 30,181 The fair value estimates presented herein are based on pertinent information available to management as of March 31, 2021and December 31, 2020. Although management is not aware of any factors that would significantly affect the estimated fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since that date, and therefore, current estimates of fair value may differ significantly from the amounts presented above.

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	8. DERIVATIVE FINANCIAL INSTRUMENTS The Bank is exposed to certain risks relating to its ongoing business operations and utilizes interest rate swap agreements (“swaps”) as part of its asset/liability management strategy to help manage its interest rate risk position. As of March 31, 2021, the Bank has entered into 148 interest-rate swap agreements with customers with a notional amount totaling $509.5 million. The Bank then entered into identical offsetting swaps with a counterparty. The swap agreements are not designated as hedging instruments. The purpose of entering into offsetting derivatives not designated as a hedging instrument is to provide the Bank a variable-rate loan receivable and to provide the customer the financial effects of a fixed-rate loan without creating significant volatility in the Bank’s earnings. The structure of the swaps is as follows. The Bank enters into an interest rate swap with its customers in which the Bank pays the customer a variable rate and the customer pays the Bank a fixed rate, therefore allowing customers to convert variable rate loans to fixed rate loans. At the same time, the Bank enters into a swap with the counterparty bank in which the Bank pays the counterparty a fixed rate and the counterparty in return pays the Bank a variable rate. The net effect of the transaction allows the Bank to receive interest on the loan from the customer at a variable rate based on LIBOR plus a spread. The changes in the fair value of the swaps primarily offset each other and therefore should not have a significant impact on the Company’s results of operations, although the Company does incur credit and counterparty risk with respect to performance on the swap agreements by the Bank’s customer and counterparty, respectively. As a result of the Bank exceeding $10 billion in assets, federal regulations required the Bank, beginning in January 2019, to clear most interest rate swaps through a clearing house (“centrally cleared”). These instruments contain language outlining collateral pledging requirements for each counterparty, in which collateral must be posted if market value exceeds certain agreed upon threshold limits. Cash or securities are pledged as collateral. Our interest rate swap derivatives are subject to a master netting arrangement with our counterparties. None of our derivative assets and liabilities are offset in the Company’s condensed consolidated balance sheet. We believe our risk of loss associated with our counterparty borrowers related to interest rate swaps is mitigated as the loans with swaps are underwritten to take into account potential additional exposure, although there can be no assurances in this regard since the performance of our swaps is subject to market and counterparty risk. Balance Sheet Classification of Derivative Financial Instruments As of March 31, 2021 and December 31, 2020, the total notional amount of the Company’s swaps was $509.5 million, and $503.8 million, respectively. The location of the asset and liability, and their respective fair values, are summarized in the tables below. March 31, 2021 Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $14,692 Other liabilities $14,692 Total derivatives $14,692 $14,692 December 31, 2020 Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $30,181 Other liabilities $30,181 Total derivatives $30,181 $30,181 The Effect of Derivative Financial Instruments on the Condensed Consolidated Statements of Earnings The following table summarizes the effect of derivative financial instruments on the condensed consolidated statements of earnings for the periods presented. Derivatives Not Designated as Hedging Instruments Location of Gain Recognized in Amount of Gain Recognized in Income on Derivative Instruments Three Months Ended March 31, 2021 2020 (Dollars in thousands) Interest rate swaps Other income $ 215 $ 373 Total $ 215 $ 373

Other Comprehensive Income

Other Comprehensive Income	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Other Comprehensive Income	9. OTHER COMPREHENSIVE INCOME The table below provides a summary of the components of other comprehensive income (“OCI”) for the periods presented. Three Months Ended March 31, 2021 2020 Before-tax Tax effect After-tax Before-tax Tax effect After-tax (Dollars in thousands) Investment securities: Net change in fair value recorded in accumulated OCI $ (40,391 ) $ 11,941 $ (28,450 ) $ 36,619 $ (10,826 ) $ 25,793 Amortization of net unrealized losses on securities transferred from available-for-sale held-to-maturity 81 (24 ) 57 (1 ) - (1 ) Net change $ (40,310 ) $ 11,917 $ (28,393 ) $ 36,618 $ (10,826 ) $ 25,792

Balance Sheet Offsetting

Balance Sheet Offsetting	3 Months Ended
	Mar. 31, 2021
Text Block [Abstract]
Balance Sheet Offsetting	10. BALANCE SHEET OFFSETTING Assets and liabilities relating to certain financial instruments, including, derivatives and securities sold under repurchase agreements (“repurchase agreements”), may be eligible for offset in the condensed consolidated balance sheets as permitted under accounting guidance. As noted above, our interest rate swap derivatives are subject to master netting arrangements. Our interest rate swap derivatives require the Company to pledge investment securities as collateral based on certain risk thresholds. Investment securities that have been pledged by the Company to counterparties continue to be reported in the Company’s condensed consolidated balance sheets unless the Company defaults. We offer a repurchase agreement product to our customers, which include master netting agreements that allow for the netting of collateral positions. This product, known as Citizens Sweep Manager, sells certain of our securities overnight to our customers under an agreement to repurchase them the next day. The repurchase agreements are not offset in the Company’s condensed consolidated balances. Gross Amounts Gross Amounts Net Amounts Presented in the Gross Amounts Not Offset in the the Condensed Condensed Condensed Financial Collateral Net Amount (Dollars in thousands) March 31, 2021 Financial assets: Derivatives not designated as hedging instruments $ 14,692 $ - $ - $ 14,692 $ - $ 14,692 Total $ 14,692 $ - $ - $ 14,692 $ - $ 14,692 Financial liabilities: Derivatives not designated as hedging instruments $ 27,826 $ (13,134 ) $ 14,692 $ 13,134 $ (45,482 ) $ (17,656 ) Repurchase agreements 506,346 - 506,346 - (543,551 ) (37,205 ) Total $ 534,172 $ (13,134 ) $ 521,038 $ 13,134 $ (589,033 ) $ (54,861 ) December 31, 2020 Financial assets: Derivatives not designated as hedging instruments $ 30,181 $ - $ - $ 30,181 $ - $ 30,181 Total $ 30,181 $ - $ - $ 30,181 $ - $ 30,181 Financial liabilities: Derivatives not designated as hedging instruments $ 30,434 $ (253 ) $ 30,181 $ 253 $ (63,730 ) $ (33,296 ) Repurchase agreements 439,406 - 439,406 - (483,603 ) (44,197 ) Total $ 469,840 $ (253 ) $ 469,587 $ 253 $ (547,333 ) $ (77,493 )

Leases

Leases	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Leases	11. LEASES The Company’s operating leases, where the Company is a lessee, include real estate, such as office space and banking centers. Lease expense for operating leases is recognized on a straight-line basis over the term of the lease and is reflected in the consolidated statement of earnings. Right-of-use While the Company has, as a lessor, certain equipment finance leases, such leases are not material to the Company’s consolidated financial statements. The tables below present the components of lease costs and supplemental information related to leases as of and for the periods presented. March 31, December 31, (Dollars in thousands) Lease Assets and Liabilities ROU assets $ 20,340 $ 19,112 Total lease liabilities 22,237 21,164 Three Months Ended March 31, 2021 2020 (Dollars in thousands) Lease Cost Operating lease expense (1) $ 1,662 $ 1,623 Sublease income - - Total lease expense $ 1,662 $ 1,623 (1) Includes short-term leases and variable lease costs, which are immaterial. Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash outflows from operating leases, net $ 1,819 $ 1,935 March 31, 2021 December 31, 020 Lease Term and Discount Rate Weighted average remaining lease term (years) 4.40 4.16 Weighted average discount rate 2.63% 2.80% The Company’s lease arrangements that have not yet commenced as of March 31, 2021 and the Company’s short-term lease costs and variable lease costs, for the three months ended March 31, 2021 are not material to the consolidated financial statements. The future lease payments required for leases that have initial or remaining non-cancelable March 31, 2021 (Dollars in thousands) Year: 2021 (excluding the three months ended March 31, 2021) $ 5,142 2022 6,031 2023 4,279 2024 3,107 2025 2,433 Thereafter 2,499 Total future lease payments 23,491 Less: Imputed interest (1,254 ) Present value of lease liabilities $ 22,237

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue Recognition	12. REVENUE RECOGNITION The following presents noninterest income, segregated by revenue streams in-scope out-of-scope No. 2014-09 Three Months Ended 2021 2020 (Dollars in thousands) Noninterest income: In-scope Service charges on deposit accounts $ 3,985 $ 4,776 Trust and investment services 2,611 2,420 Bankcard services 350 577 Gain on OREO, net 429 10 Other 1,682 1,798 Noninterest Income (in-scope 9,057 9,581 Noninterest Income (out-of-scope 4,624 2,059 Total noninterest income $ 13,681 $ 11,640 Refer to Note 3 – Summary of Significant Accounting Policies Revenue Recognition, 10-K in-scope

Accounting policies (Policies)

Accounting policies (Policies)	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reclassification	Reclassification
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Estimated Fair Value of Investment Securities	March 31, 2021 Amortized Cost Gross Unrealized Holding Gain Gross Unrealized Holding Loss Fair Value Total Percent (Dollars in thousands) Investment securities available-for-sale: Mortgage-backed securities $ 2,175,414 $ 38,333 $ (22,409) $ 2,191,338 77.92% CMO/REMIC 592,915 4,072 (6,821) 590,166 20.99% Municipal bonds 28,703 1,183 - 29,886 1.06% Other securities 958 - - 958 0.03% Total available-for-sale $ 2,797,990 $ 43,588 $ (29,230) $ 2,812,348 100.00% Investment securities held-to-maturity: Government agency/GSE $ 601,142 $ 3,860 $ (16,289 ) $ 588,713 55.30% Mortgage-backed securities 135,137 5,348 (255 ) 140,230 12.43% CMO/REMIC 133,556 2,832 - 136,388 12.29% Municipal bonds 217,149 5,095 (2,094) 220,150 19.98% Total held-to-maturity $ 1,086,984 $ 17,135 $ (18,638) $ 1,085,481 100.00% December 31, 2020 Amortized Cost Gross Unrealized Holding Gain Gross Unrealized Holding Loss Fair Value Total Percent (Dollars in thousands) Investment securities available-for-sale: Mortgage-backed securities $ 1,857,030 $ 48,006 $ (101) $ 1,904,935 79.41% CMO/REMIC 457,548 5,515 (249) 462,814 19.29% Municipal bonds 28,707 1,578 - 30,285 1.26% Other securities 889 - - 889 0.04% Total available-for-sale $ 2,344,174 $ 55,099 $ (350) $ 2,398,923 100.00% Investment securities held-to-maturity: Government agency/GSE $ 98,663 $ 5,877 $ - $ 104,540 17.05% Mortgage-backed securities 146,382 7,644 (32) 153,994 25.30% CMO/REMIC 145,309 5,202 - 150,511 25.11% Municipal bonds 188,272 6,980 (74) 195,178 32.54% Total held-to-maturity $ 578,626 $ 25,703 $ (106) $ 604,223 100.00%
Summary of Interest Income Earned on Investment Securities	The following table provides information about the amount of interest income earned on investment securities which is fully taxable and which is exempt from regular federal income tax. Three Months Ended March 31, 2021 2020 (Dollars in thousands) Investment securities available-for-sale: Taxable $ 8,968 $ 9,825 Tax-advantaged 191 224 Total interest income from available-for-sale 9,159 10,049 Investment securities held-to-maturity: Taxable 2,811 2,698 Tax-advantaged 1,129 1,300 Total interest income from held-to-maturity 3,940 3,998 Total interest income from investment securities $ 13,099 $ 14,047
Summary of Continuous Unrealized Loss Position of Securities	The following table presents the Company’s available-for-sale March 31, 2021 Less Than 12 Months 12 Months or Longer Total Fair Value Gross Fair Value Gross Fair Value Gross (Dollars in thousands) Investment securities available-for-sale: Mortgage-backed securities $ 1,327,126 $ (22,409 ) $ - $ - $ 1,327,126 $ (22,409 ) CMO/REMIC 422,765 (6,821 ) - - 422,765 (6,821 ) Municipal bonds - - - - - - Total available-for-sale $ 1,749,891 $ (29,230 ) $ - $ - $ 1,749,891 $ (29,230 ) December 31, 2020 Less Than 12 Months 12 Months or Longer Total Fair Value Gross Fair Value Gross Fair Gross (Dollars in thousands) Investment securities available-for-sale: Mortgage-backed securities $ 72,219 $ (101 ) $ - $ - $ 72,219 $ (101 ) CMO/REMIC 96,974 (249 ) - - 96,974 (249 ) Municipal bonds - - - - - - Total available-for-sale $ 169,193 $ (350 ) $ - $ - $ 169,193 $ (350 )
Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	Mortgage-backed and CMO/REMIC securities are included in maturity categories based upon estimated average lives which incorporate estimated prepayment speeds. March 31, 2021 Available-for-sale Held-to-maturity Amortized Fair Value Amortized Fair Value (Dollars in thousands) Due in one year or less $ 4,821 $ 4,920 $ 4,054 $ 4,086 Due after one year through five years 2,368,827 2,383,641 280,057 288,032 Due after five years through ten years 393,699 392,160 133,106 134,081 Due after ten years 30,643 31,627 669,767 659,282 Total investment securities $ 2,797,990 $ 2,812,348 $ 1,086,984 $ 1,085,481

Loans and Lease Finance Recei_2

Loans and Lease Finance Receivables and Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Summary of Components of Loans and Lease Finance Receivables, Excluding PCI Loans	The following table provides a summary of total loans and lease finance receivables by type. March 31, 2021 December 31, 2020 (Dollars in thousands) Commercial real estate $ 5,596,781 $ 5,501,509 Construction 96,356 85,145 SBA 307,727 303,896 SBA - Paycheck Protection Program (PPP) 897,724 882,986 Commercial and industrial 753,708 812,062 Dairy & livestock and agribusiness 261,088 361,146 Municipal lease finance receivables 42,349 45,547 SFR mortgage 255,400 270,511 Consumer and other loans 81,924 86,006 Total loans, at amortized cost 8,293,057 8,348,808 Less: Allowance for credit losses (71,805 ) (93,692 ) Total loans and lease finance receivables, net $ 8,221,252 $ 8,255,116
Summary of loans by type and origination year, according to our internal risk ratings	Origination Year Revolving loans cost basis Revolving loans converted to term loans March 31, 2021 2021 2020 2019 2018 2017 Prior Total (Dollars in thousands) Commercial real estate loans: Risk Rating: Pass $ 282,950 $ 981,750 $ 678,640 $ 588,405 $ 569,006 $ 2,063,996 $ 180,542 $ 35,794 $ 5,381,083 Special Mention 10,420 9,254 11,441 25,826 50,811 66,570 4,609 9,890 188,821 Substandard - - 479 2,156 9,064 14,347 500 331 26,877 Doubtful & Loss - - - - - - - - - Total Commercial real estate loans: $ 293,370 $ 991,004 $ 690,560 $ 616,387 $ 628,881 $ 2,144,913 $ 185,651 $ 46,015 $ 5,596,781 Construction loans: Risk Rating: Pass $ 876 $ 19,034 $ 7,974 $ 6,380 $ 2,257 $ 4 $ 52,058 $ - $ 88,583 Special Mention - - - 7,773 - - - - 7,773 Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Construction loans: $ 876 $ 19,034 $ 7,974 $ 14,153 $ 2,257 $ 4 $ 52,058 $ - $ 96,356 SBA loans: Risk Rating: Pass $ 20,599 $ 44,593 $ 12,742 $ 43,163 $ 55,759 $ 104,385 $ - $ 2,976 $ 284,217 Special Mention - - - - 5,408 6,864 - - 12,272 Substandard - - - 876 5,145 5,217 - - 11,238 Doubtful & Loss - - - - - - - - - Total SBA loans: $ 20,599 $ 44,593 $ 12,742 $ 44,039 $ 66,312 $ 116,466 $ - $ 2,976 $ 307,727 SBA - PPP loans: Risk Rating: Pass $ 314,940 $ 581,281 $ - $ - $ - $ - $ - $ - $ 896,221 Special Mention - - - - - - - - - Substandard - 1,503 - - - - - - 1,503 Doubtful & Loss - - - - - - - - - Total SBA - PPP loans: $ 314,940 $ 582,784 $ - $ - $ - $ - $ - $ - $ 897,724 Commercial and industrial loans: Risk Rating: Pass $ 31,474 $ 100,585 $ 147,772 $ 59,414 $ 50,335 $ 97,792 $ 219,271 $ 6,303 $ 712,946 Special Mention 486 1,781 1,881 1,732 856 4,798 10,485 247 22,266 Substandard 2,643 1,611 808 3,467 2,039 355 6,183 1,390 18,496 Doubtful & Loss - - - - - - - - - Total Commercial and industrial $ 34,603 $ 103,977 $ 150,461 $ 64,613 $ 53,230 $ 102,945 $ 235,939 $ 7,940 $ 753,708 Origination Year Revolving loans cost basis Revolving loans converted to term loans March 31, 2021 2021 2020 2019 2018 2017 Prior Total (Dollars in thousands) Dairy & livestock and agribusiness Risk Rating: Pass $ - $ 2,216 $ 1,660 $ 1,102 $ 256 $ 391 $ 227,667 $ 387 $ 233,679 Special Mention - - - 347 - 1,684 11,029 7,342 20,402 Substandard - - - 259 - - - 6,748 7,007 Doubtful & Loss - - - - - - - - - Total Dairy & livestock and $ - $ 2,216 $ 1,660 $ 1,708 $ 256 $ 2,075 $ 238,696 $ 14,477 $ 261,088 Municipal lease finance receivables loans: Risk Rating: Pass $ - $ 8,217 $ - $ 2,556 $ 10,248 $ 20,916 $ - $ - $ 41,937 Special Mention - - - - - 412 - - 412 Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Municipal lease finance $ - $ 8,217 $ - $ 2,556 $ 10,248 $ 21,328 $ - $ - $ 42,349 SFR mortgage loans: Risk Rating: Pass $ 7,745 $ 61,021 $ 53,148 $ 27,117 $ 20,857 $ 81,721 $ 2 $ - $ 251,611 Special Mention - - - - - 195 - - 195 Substandard - - - - - 3,168 - 426 3,594 Doubtful & Loss - - - - - - - - - Total SFR mortgage loans: $ 7,745 $ 61,021 $ 53,148 $ 27,117 $ 20,857 $ 85,084 $ 2 $ 426 $ 255,400 Consumer and other loans: Risk Rating: Pass $ 2,618 $ 7,558 $ 1,833 $ 778 $ 878 $ 2,157 $ 61,735 $ 1,791 $ 79,348 Special Mention 975 - - - - 90 516 - 1,581 Substandard - - - - - 170 149 676 995 Doubtful & Loss - - - - - - - - - Total Consumer and other loans: $ 3,593 $ 7,558 $ 1,833 $ 778 $ 878 $ 2,417 $ 62,400 $ 2,467 $ 81,924 Total Loans: Risk Rating: Pass $ 661,202 $ 1,806,255 $ 903,769 $ 728,915 $ 709,596 $ 2,371,362 $ 741,275 $ 47,251 $ 7,969,625 Special Mention 11,881 11,035 13,322 35,678 57,075 80,613 26,639 17,479 253,722 Substandard 2,643 3,114 1,287 6,758 16,248 23,257 6,832 9,571 69,710 Doubtful & Loss - - - - - - - - - Total Loans: $ 675,726 $ 1,820,404 $ 918,378 $ 771,351 $ 782,919 $ 2,475,232 $ 774,746 $ 74,301 $ 8,293,057 Origination Year Revolving loans cost basis Revolving loans converted to term loans December 31, 2020 2020 2019 2018 2017 2016 Prior Total (Dollars in thousands) Commercial real estate loans: Risk Rating: Pass $ 979,499 $ 691,091 $ 607,753 $ 617,640 $ 550,105 $ 1,646,876 $ 192,583 $ 24,548 $ 5,310,095 Special Mention 9,332 7,162 30,049 43,870 17,398 49,840 5,720 994 164,365 Substandard - 491 2,157 7,382 2,528 13,790 360 341 27,049 Doubtful & Loss - - - - - - - - - Total Commercial real estate loans: $ 988,831 $ 698,744 $ 639,959 $ 668,892 $ 570,031 $ 1,710,506 $ 198,663 $ 25,883 $ 5,501,509 Construction loans: Risk Rating: Pass $ 14,511 $ 9,350 $ 14,945 $ 2,258 $ - $ 4 $ 44,077 $ - $ 85,145 Special Mention - - - - - - - - - Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Construction loans: $ 14,511 $ 9,350 $ 14,945 $ 2,258 $ - $ 4 $ 44,077 $ - $ 85,145 SBA loans: Risk Rating: Pass $ 47,901 $ 12,821 $ 44,950 $ 58,839 $ 26,136 $ 86,085 $ - $ 2,976 $ 279,708 Special Mention - - - 5,446 1,336 5,648 - - 12,430 Substandard - - 904 5,503 1,554 3,797 - - 11,758 Doubtful & Loss - - - - - - - - - Total SBA loans: $ 47,901 $ 12,821 $ 45,854 $ 69,788 $ 29,026 $ 95,530 $ - $ 2,976 $ 303,896 SBA - PPP loans: Risk Rating: Pass $ 882,986 $ - $ - $ - $ - $ - $ - $ - $ 882,986 Special Mention - - - - - - - - - Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total SBA - PPP loans: $ 882,986 $ - $ - $ - $ - $ - $ - $ - $ 882,986 Commercial and industrial loans: Risk Rating: Pass $ 104,478 $ 168,050 $ 62,453 $ 56,043 $ 32,149 $ 76,019 $ 257,250 $ 6,058 $ 762,500 Special Mention 1,995 1,081 1,892 1,028 95 4,882 17,395 1,132 29,500 Substandard 4,346 860 3,996 2,282 285 94 6,677 1,522 20,062 Doubtful & Loss - - - - - - - - - Total Commercial and industrial loans: $ 110,819 $ 169,991 $ 68,341 $ 59,353 $ 32,529 $ 80,995 $ 281,322 $ 8,712 $ 812,062 Origination Year Revolving loans cost basis Revolving loans converted to term loans December 31, 2020 2020 2019 2018 2017 2016 Prior Total (Dollars in thousands) Dairy & livestock and agribusiness loans: Risk Rating: Pass $ 1,041 $ 1,765 $ 1,199 $ 5,680 $ 120 $ 320 $ 319,211 $ 363 $ 329,699 Special Mention 878 - 364 - - - 13,255 1,511 16,008 Substandard - - 784 693 2,285 - - 11,677 15,439 Doubtful & Loss - - - - - - - - - Total Dairy & livestock and agribusiness loans: $ 1,919 $ 1,765 $ 2,347 $ 6,373 $ 2,405 $ 320 $ 332,466 $ 13,551 $ 361,146 Municipal lease finance receivables loans: Risk Rating: Pass $ 8,478 $ - $ 2,556 $ 10,249 $ 3,586 $ 20,266 $ - $ - $ 45,135 Special Mention - - - - - 412 - - 412 Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Municipal lease finance receivables loans: $ 8,478 $ - $ 2,556 $ 10,249 $ 3,586 $ 20,678 $ - $ - $ 45,547 SFR mortgage loans: Risk Rating: Pass $ 65,463 $ 59,596 $ 29,142 $ 22,452 $ 27,192 $ 62,593 $ 3 $ - $ 266,441 Special Mention - - - - - 452 - - 452 Substandard - - - - 229 2,957 - 432 3,618 Doubtful & Loss - - - - - - - - - Total SFR mortgage loans: $ 65,463 $ 59,596 $ 29,142 $ 22,452 $ 27,421 $ 66,002 $ 3 $ 432 $ 270,511 Consumer and other loans: Risk Rating: Pass $ 8,557 $ 2,077 $ 871 $ 969 $ 1,586 $ 961 $ 67,774 $ 1,688 $ 84,483 Special Mention - - - - - 91 517 22 630 Substandard - - - - - 172 - 721 893 Doubtful & Loss - - - - - - - - - Total Consumer and other loans: $ 8,557 $ 2,077 $ 871 $ 969 $ 1,586 $ 1,224 $ 68,291 $ 2,431 $ 86,006 Total Loans: Risk Rating: Pass $ 2,112,914 $ 944,750 $ 763,869 $ 774,130 $ 640,874 $ 1,893,124 $ 880,898 $ 35,633 $ 8,046,192 Special Mention 12,205 8,243 32,305 50,344 18,829 61,325 36,887 3,659 223,797 Substandard 4,346 1,351 7,841 15,860 6,881 20,810 7,037 14,693 78,819 Doubtful & Loss - - - - - - - - - Total Loans: $ 2,129,465 $ 954,344 $ 804,015 $ 840,334 $ 666,584 $ 1,975,259 $ 924,822 $ 53,985 $ 8,348,808
Schedule of Balance and Activity Related to Allowance for Loan Losses for Held-for-Investment Loans by Type	The following tables present the balance and activity related to the allowance for credit losses for held-for-investment Three Months Ended March 31, 2021 Ending Balance Charge-offs Recoveries (Recapture of) Ending Balance (Dollars in thousands) Commercial real estate $ 75,439 $ - $ - $ (18,867 ) $ 56,572 Construction 1,934 - 3 (59 ) 1,878 SBA 2,992 - 4 (484 ) 2,512 SBA - PPP - - - - - Commercial and industrial 7,142 (2,475 ) 2 1,770 6,439 Dairy & livestock and agribusiness 3,949 - - (1,227 ) 2,722 Municipal lease finance receivables 74 - - (39 ) 35 SFR mortgage 367 - 79 (148 ) 298 Consumer and other loans 1,795 - - (446 ) 1,349 Total allowance for credit losses $ 93,692 $ (2,475 ) $ 88 $ (19,500 ) $ 71,805 Three Months Ended March 31, 2020 Ending Balance, prior to adoption of ASU 2016-13 December 31, 2019 Impact of Adoption of ASU 2016-13 Charge-offs Recoveries Provision for (Recapture of) Credit Losses Ending Balance March 31, 2020 (Dollars in thousands) Commercial real estate $48,629 $ 3,547 $ - $ - $ 6,251 $ 58,427 Construction 858 655 - 3 3,116 4,632 SBA 1,453 1,818 - - 675 3,946 Commercial and industrial 8,880 (2,442 ) - 2 2,947 9,387 Dairy & livestock and agribusiness 5,255 (186 ) - - (803 ) 4,266 Municipal lease finance receivables 623 (416 ) - - 70 277 SFR mortgage 2,339 (2,043 ) - 206 (221 ) 281 Consumer and other loans 623 907 (86 ) 16 (35 ) 1,425 Total allowance for credit losses $68,660 $ 1,840 $ (86 ) $ 227 $ 12,000 $ 82,641
Schedule of Recorded Investment in, and Aging of, Past Due and Nonaccrual Loans, Excluding PCI Loans by Class of Loans	The following table presents the recorded investment in, and the aging of, past due loans (including nonaccrual loans), by type of loans as of the dates presented. March 31, 2021 30-59 Days 60-89 Days Greater than 89 Total Loans Not Total Loans (Dollars in thousands) Commercial real estate Owner occupied $ - $ 211 $ 6,934 $ 7,145 $ 2,165,178 $ 2,172,323 Non-owner 178 - - 178 3,424,280 3,424,458 Construction Speculative (1) - - - - 80,857 80,857 Non-speculative - - - - 15,499 15,499 SBA 258 - 1,028 1,286 306,441 307,727 SBA - PPP - - - - 897,724 897,724 Commercial and industrial 452 689 2,606 3,747 749,961 753,708 Dairy & livestock and agribusiness - - 259 259 260,829 261,088 Municipal lease finance receivables - - - - 42,349 42,349 SFR mortgage 266 - 229 495 254,905 255,400 Consumer and other loans 21 - 193 214 81,710 81,924 Total loans $ 1,175 $ 900 $ 11,249 $ 13,324 $ 8,279,733 $ 8,293,057 (1) Speculative construction loans are generally for properties where there is no identified buyer or renter. December 31, 2020 30-59 Days 60-89 Days Greater than 89 Total Loans Not Total Loans (Dollars in thousands) Commercial real estate Owner occupied $ - $ - $ 7,208 $ 7,208 $ 2,136,051 $ 2,143,259 Non-owner - - - - 3,358,250 3,358,250 Construction Speculative (1) - - - - 72,126 72,126 Non-speculative - - - - 13,019 13,019 SBA 531 2,415 1,025 3,971 299,925 303,896 SBA - PPP - - - - 882,986 882,986 Commercial and industrial 608 811 2,338 3,757 808,305 812,062 Dairy & livestock and agribusiness - - 784 784 360,362 361,146 Municipal lease finance receivables - - - - 45,547 45,547 SFR mortgage - - 229 229 270,282 270,511 Consumer and other loans - - - - 86,006 86,006 Total loans $ 1,139 $ 3,226 $ 11,584 $ 15,949 $ 8,332,859 $ 8,348,808 (1) Speculative construction loans are generally for properties where there is no identified buyer or renter. Amortized cost of our finance receivables and loans that are on nonaccrual status, including loans with no allowance are presented as of March 31, 2021 and December 31, 2020 by type of loan. March 31, 2021 Nonaccrual Total Loans Past (Dollars in thousands) Commercial real estate Owner occupied $ 7,395 $ 7,395 $ - Non-owner - - - Construction Speculative (2) - - - Non-speculative - - - SBA 2,076 2,412 - SBA - PPP - - - Commercial and industrial 1,506 2,967 - Dairy & livestock and agribusiness - 259 - Municipal lease finance receivables - - - SFR mortgage 424 424 - Consumer and other loans 312 312 - Total loans $ 11,713 $ 13,769 $ - (1) As of March 31, 2021, $2.1 million of nonaccruing loans were current, $400,000 were 60-89 (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. December 31, 2020 Nonaccrual Total Loans Past (Dollars in thousands) Commercial real estate Owner occupied $ 7,563 $ 7,563 $ - Non-owner - - - Construction Speculative (2) - - - Non-speculative - - - SBA 2,035 2,273 - SBA - PPP - - - Commercial and industrial 1,576 3,129 - Dairy & livestock and agribusiness 785 785 - Municipal lease finance receivables 430 - - SFR mortgage - 430 - Consumer and other loans 167 167 - Total loans $ 12,556 $ 14,347 $ - (1) As of December 31, 2020, $1.4 million of nonaccruing loans were current, $2,000 were 30-59 60-89 (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. (3) Excludes $184,000 of guaranteed portion of nonaccrual SBA loans that are in process of collection.
Summary of pledged assets not separately reported on statement of financial position	The following table presents the recorded investment in collateral-dependent loans by type of loans as of the dates presented. March 31, 2021 Number of Dependent on Collateral Real Estate Business Assets Other (Dollars in thousands) Commercial real estate $ 7,689 $ - $ - 8 Construction - - - 11 SBA 1,826 418 168 - SBA - PPP - - - - Commercial and industrial 421 7,708 143 21 Dairy & livestock and agribusiness - 259 - 1 Municipal lease finance receivables - - - - SFR mortgage 424 - - 2 Consumer and other loans 312 - - 3 Total collateral-dependent loans $ 10,672 $ 8,385 $ 311 46 December 31, 2020 Number of Dependent on Collateral Real Estate Business Assets Other (Dollars in thousands) Commercial real estate $ 7,883 $ - $ - 8 Construction - - - - SBA 1,761 326 185 10 SBA - PPP - - - - Commercial and industrial 470 5,542 95 18 Dairy & livestock and agribusiness - 785 - 1 Municipal lease finance receivables - - - - SFR mortgage 430 - - 2 Consumer and other loans 168 - - 2 Total collateral-dependent loans $ 10,712 $ 6,653 $ 280 41
Summary of Activity Related to Troubled Debt Restructurings	The following table provides a summary of the activity related to TDRs for the periods presented. Three Months Ended March 31, 2021 2020 (Dollars in thousands) Performing TDRs: Beginning balance $ 2,159 $ 3,112 New modifications 4,643 - Payoffs/payments, net and other (989 ) (299 ) TDRs returned to accrual status - - TDRs placed on nonaccrual status - - Ending balance $ 5,813 $ 2,813 Nonperforming TDRs: Beginning balance $ - $ 244 New modifications - - Charge-offs - - Payoffs/payments, net and other - (244 ) TDRs returned to accrual status - - TDRs placed on nonaccrual status - - Ending balance $ - $ - Total TDRs $ 5,813 $ 2,813
Summary of Loans Modified as Troubled Debt Restructurings	Modifications (1) For the Three Months Ended March 31, 2021 Number of Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial real estate: Interest rate reduction - $ - $ - $ - $ - - - - - - Commercial and industrial: Interest rate reduction - - - - - Change in amortization 2 4,643 4,643 4,443 - SFR mortgage: Interest rate reduction - - - - - - - - - - Total loans 2 $ 4,643 $ 4,643 $ 4,443 $ - (1) The tables above exclude modified loans that were paid off prior to the end of the period. (2) Financial effects resulting from modifications represent charge-offs and current allowance for credit losses at modification date.

Earnings Per Share Reconcilia_2

Earnings Per Share Reconciliation (Tables)	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Schedule of Earnings Per Common Share Reconciliation	The table below shows earnings per common share and diluted earnings per common share, and reconciles the numerator and denominator of both earnings per common share calculations. Three Months Ended 2021 2020 (In thousands, except per share amounts) Earnings per common share: Net earnings $ 63,893 $ 37,980 Less: Net earnings allocated to restricted stock 309 83 Net earnings allocated to common shareholders $ 63,584 $ 37,897 Weighted average shares outstanding 135,175 139,107 Basic earnings per common share $ 0.47 $ 0.27 Diluted earnings per common share: Net income allocated to common shareholders 63,584 37,897 Weighted average shares outstanding 135,175 139,107 Incremental shares from assumed exercise of outstanding options 253 209 Diluted weighted average shares outstanding 135,428 139,316 Diluted earnings per common share $ 0.47 $ 0.27

Fair Value Information (Tables)

Fair Value Information (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	The tables below present the balances of assets and liabilities measured at fair value on a recurring basis as of the dates presented. Carrying Value at Quoted Prices in (Level 1) Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Mortgage-backed securities $ 2,191,338 $ - $ 2,191,338 $ - CMO/REMIC 590,166 - 590,166 - Municipal bonds 29,886 - 29,886 - Other securities 958 - 958 - Total investment securities - AFS 2,812,348 - 2,812,348 - Interest rate swaps 14,692 - 14,692 - Total assets $ 2,827,040 $ - $ 2,827,040 $ - Description of liability Interest rate swaps $ 14,692 $ - $ 14,692 $ - Total liabilities $ 14,692 $ - $ 14,692 $ - Carrying Value at Quoted Prices in (Level 1) Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Mortgage-backed securities $ 1,904,935 $ - $ 1,904,935 $ - CMO/REMIC 462,814 - 462,814 - Municipal bonds 30,285 - 30,285 - Other securities 889 - 889 - Total investment securities - AFS 2,398,923 - 2,398,923 - Interest rate swaps 30,181 - 30,181 - Total assets $ 2,429,104 $ - $ 2,429,104 $ - Description of liability Interest rate swaps $ 30,181 $ - $ 30,181 $ - Total liabilities $ 30,181 $ - $ 30,181 $ -
Assets and Liabilities Measured at Fair Value on Non-Recurring Basis	the following tables provide the level of valuation assumptions used to determine each adjustment and the carrying value of the related assets that had losses during the period. Carrying Value at Quoted Prices in Significant Other Significant Total Losses (Dollars in thousands) Description of assets Loans: Commercial real estate $ - $ - $ - $ - $ - Construction - - - - - SBA 97 - - 97 19 Commercial and industrial 2,248 - - 2,248 307 Dairy & livestock and agribusiness 260 - - 260 102 Municipal lease finance receivables - - - - - SFR mortgage - - - - - Consumer and other loans - - - - - Other real estate owned - - - - - Asset held-for-sale - - - - - Total assets $ 2,605 $ - $ - $ 2,605 $ 428 Carrying Value at Quoted Prices in Significant Other Significant Total Losses For (Dollars in thousands) Description of assets Loans: Commercial real estate $ - $ - $ - $ - $ - Construction - - - - - SBA 76 - - 76 24 Commercial and industrial 4,266 - - 4,266 2,316 Dairy & livestock and agribusiness - - - - - Municipal lease finance receivables - - - - - SFR mortgage - - - - - Consumer and other loans - - - - - Other real estate owned 2,275 - - 2,275 700 Asset held-for-sale - - - - - Total assets $ 6,617 $ - $ - $ 6,617 $ 3,040
Estimated Fair Value of Financial Instruments	The following disclosure presents estimated fair value of our financial instruments. The estimated fair value amounts have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to develop the estimates of fair value. Accordingly, the estimates presented below are not necessarily indicative of the amounts the Company may realize in a current market exchange as of March 31, 2021 and December 31, 2020, respectively. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. March 31, 2021 Estimated Fair Value Carrying Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 1,525,299 $ 1,525,299 $ - $ - $ 1,525,299 Interest-earning balances due from depository institutions 27,748 - 27,748 - 27,748 Investment securities available-for-sale 2,812,348 - 2,812,348 - 2,812,348 Investment securities held-to-maturity 1,086,984 - 1,085,481 - 1,085,481 Total loans, net of allowance for credit losses 8,221,252 - - 8,231,707 8,231,707 Swaps 14,692 - 14,692 - 14,692 Liabilities Deposits: Interest-bearing $ 4,500,816 $ - $ 4,500,611 $ - $ 4,500,611 Borrowings 511,346 - 504,563 - 504,563 Junior subordinated debentures 25,774 - - 20,351 20,351 Swaps 14,692 - 14,692 - 14,692 December 31, 2020 Estimated Fair Value Carrying Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 1,958,160 $ 1,958,160 $ - $ - $ 1,958,160 Interest-earning balances due from depository institutions 43,563 - 43,600 - 43,600 Investment securities available-for-sale 2,398,923 - 2,398,923 - 2,398,923 Investment securities held-to-maturity 578,626 - 604,223 - 604,223 Total loans, net of allowance for credit losses 8,255,116 - - 8,256,178 8,256,178 Swaps 30,181 - 30,181 - 30,181 Liabilities Deposits: Interest-bearing $ 4,281,114 $ - $ 4,281,952 $ - $ 4,281,952 Borrowings 444,406 - 444,349 - 444,349 Junior subordinated debentures 25,774 - - 19,431 19,431 Swaps 30,181 - 30,181 - 30,181

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Instruments	As of March 31, 2021 and December 31, 2020, the total notional amount of the Company’s swaps was $509.5 million, and $503.8 million, respectively. The location of the asset and liability, and their respective fair values, are summarized in the tables below. March 31, 2021 Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $14,692 Other liabilities $14,692 Total derivatives $14,692 $14,692 December 31, 2020 Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $30,181 Other liabilities $30,181 Total derivatives $30,181 $30,181
Effect of Derivative Instruments on Consolidated Statement of Earnings	The following table summarizes the effect of derivative financial instruments on the condensed consolidated statements of earnings for the periods presented. Derivatives Not Designated as Hedging Instruments Location of Gain Recognized in Amount of Gain Recognized in Income on Derivative Instruments Three Months Ended March 31, 2021 2020 (Dollars in thousands) Interest rate swaps Other income $ 215 $ 373 Total $ 215 $ 373

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Summary of Components of Other Comprehensive Income	The table below provides a summary of the components of other comprehensive income (“OCI”) for the periods presented. Three Months Ended March 31, 2021 2020 Before-tax Tax effect After-tax Before-tax Tax effect After-tax (Dollars in thousands) Investment securities: Net change in fair value recorded in accumulated OCI $ (40,391 ) $ 11,941 $ (28,450 ) $ 36,619 $ (10,826 ) $ 25,793 Amortization of net unrealized losses on securities transferred from available-for-sale held-to-maturity 81 (24 ) 57 (1 ) - (1 ) Net change $ (40,310 ) $ 11,917 $ (28,393 ) $ 36,618 $ (10,826 ) $ 25,792

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	3 Months Ended
	Mar. 31, 2021
Text Block [Abstract]
Schedule of Balance Sheet Offsetting	Gross Amounts Gross Amounts Net Amounts Presented in the Gross Amounts Not Offset in the the Condensed Condensed Condensed Financial Collateral Net Amount (Dollars in thousands) March 31, 2021 Financial assets: Derivatives not designated as hedging instruments $ 14,692 $ - $ - $ 14,692 $ - $ 14,692 Total $ 14,692 $ - $ - $ 14,692 $ - $ 14,692 Financial liabilities: Derivatives not designated as hedging instruments $ 27,826 $ (13,134 ) $ 14,692 $ 13,134 $ (45,482 ) $ (17,656 ) Repurchase agreements 506,346 - 506,346 - (543,551 ) (37,205 ) Total $ 534,172 $ (13,134 ) $ 521,038 $ 13,134 $ (589,033 ) $ (54,861 ) December 31, 2020 Financial assets: Derivatives not designated as hedging instruments $ 30,181 $ - $ - $ 30,181 $ - $ 30,181 Total $ 30,181 $ - $ - $ 30,181 $ - $ 30,181 Financial liabilities: Derivatives not designated as hedging instruments $ 30,434 $ (253 ) $ 30,181 $ 253 $ (63,730 ) $ (33,296 ) Repurchase agreements 439,406 - 439,406 - (483,603 ) (44,197 ) Total $ 469,840 $ (253 ) $ 469,587 $ 253 $ (547,333 ) $ (77,493 )

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Components of lease costs and supplemental information related to leases	The tables below present the components of lease costs and supplemental information related to leases as of and for the periods presented. March 31, December 31, (Dollars in thousands) Lease Assets and Liabilities ROU assets $ 20,340 $ 19,112 Total lease liabilities 22,237 21,164 Three Months Ended March 31, 2021 2020 (Dollars in thousands) Lease Cost Operating lease expense (1) $ 1,662 $ 1,623 Sublease income - - Total lease expense $ 1,662 $ 1,623 (1) Includes short-term leases and variable lease costs, which are immaterial. Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash outflows from operating leases, net $ 1,819 $ 1,935 March 31, 2021 December 31, 020 Lease Term and Discount Rate Weighted average remaining lease term (years) 4.40 4.16 Weighted average discount rate 2.63% 2.80%
Future lease payments required for leases that have initial or remaining non-cancelable lease terms	The future lease payments required for leases that have initial or remaining non-cancelable March 31, 2021 (Dollars in thousands) Year: 2021 (excluding the three months ended March 31, 2021) $ 5,142 2022 6,031 2023 4,279 2024 3,107 2025 2,433 Thereafter 2,499 Total future lease payments 23,491 Less: Imputed interest (1,254 ) Present value of lease liabilities $ 22,237

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Summary of Non Interest Income, Segregated by Revenue Streams in-Scope and Out-of-Scope of Topic 606	The following presents noninterest income, segregated by revenue streams in-scope out-of-scope No. 2014-09 Three Months Ended 2021 2020 (Dollars in thousands) Noninterest income: In-scope Service charges on deposit accounts $ 3,985 $ 4,776 Trust and investment services 2,611 2,420 Bankcard services 350 577 Gain on OREO, net 429 10 Other 1,682 1,798 Noninterest Income (in-scope 9,057 9,581 Noninterest Income (out-of-scope 4,624 2,059 Total noninterest income $ 13,681 $ 11,640

Business - Additional Informati

Business - Additional Information (Detail)	Mar. 31, 2021LocationLoanSubsidiary
Schedule Of Description Of Company [Line Items]
Number of inactive subsidiaries | Subsidiary	1
Bank operated banking centers	57
Bank operated trust office locations, number	3
Number of loan production office | Loan	1

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Estimated Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 2,797,990	$ 2,344,174
Gross Unrealized Holding Gain, Available-for-sale	43,588	55,099
Gross Unrealized Holding Loss, Available-for-sale	(29,230)	(350)
Fair Value, Available-for-sale	$ 2,812,348	$ 2,398,923
Total Percent, Available-for-sale	100.00%	100.00%
Amortized Cost, Held-to-maturity	$ 1,086,984	$ 578,626
Gross Unrealized Holding Gain, Held-to-maturity	17,135	25,703
Gross Unrealized Holding Loss, Held-to-maturity	(18,638)	(106)
Fair Value, Held-to-maturity	$ 1,085,481	$ 604,223
Total Percent, Held-to-maturity	100.00%	100.00%
CMO/REMIC [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 592,915	$ 457,548
Gross Unrealized Holding Gain, Available-for-sale	4,072	5,515
Gross Unrealized Holding Loss, Available-for-sale	(6,821)	(249)
Fair Value, Available-for-sale	$ 590,166	$ 462,814
Total Percent, Available-for-sale	20.99%	19.29%
Amortized Cost, Held-to-maturity	$ 133,556	$ 145,309
Gross Unrealized Holding Gain, Held-to-maturity	2,832	5,202
Gross Unrealized Holding Loss, Held-to-maturity		0
Fair Value, Held-to-maturity	$ 136,388	$ 150,511
Total Percent, Held-to-maturity	12.29%	25.11%
Government Agency/GSE [Member]
Schedule of Investments [Line Items]
Amortized Cost, Held-to-maturity	$ 601,142	$ 98,663
Gross Unrealized Holding Gain, Held-to-maturity	3,860	5,877
Gross Unrealized Holding Loss, Held-to-maturity		0
Fair Value, Held-to-maturity	$ 588,713	$ 104,540
Total Percent, Held-to-maturity	55.30%	17.05%
Mortgage-backed Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 2,175,414	$ 1,857,030
Gross Unrealized Holding Gain, Available-for-sale	38,333	48,006
Gross Unrealized Holding Loss, Available-for-sale	(22,409)	(101)
Fair Value, Available-for-sale	$ 2,191,338	$ 1,904,935
Total Percent, Available-for-sale	77.92%	79.41%
Amortized Cost, Held-to-maturity	$ 135,137	$ 146,382
Gross Unrealized Holding Gain, Held-to-maturity	5,348	7,644
Gross Unrealized Holding Loss, Held-to-maturity		(32)
Fair Value, Held-to-maturity	$ 140,230	$ 153,994
Total Percent, Held-to-maturity	12.43%	25.30%
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 28,703	$ 28,707
Gross Unrealized Holding Gain, Available-for-sale	1,183	1,578
Gross Unrealized Holding Loss, Available-for-sale		0
Fair Value, Available-for-sale	$ 29,886	$ 30,285
Total Percent, Available-for-sale	1.06%	1.26%
Amortized Cost, Held-to-maturity	$ 217,149	$ 188,272
Gross Unrealized Holding Gain, Held-to-maturity	5,095	6,980
Gross Unrealized Holding Loss, Held-to-maturity	(2,094)	(74)
Fair Value, Held-to-maturity	$ 220,150	$ 195,178
Total Percent, Held-to-maturity	19.98%	32.54%
Other Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 958	$ 889
Gross Unrealized Holding Gain, Available-for-sale
Gross Unrealized Holding Loss, Available-for-sale
Fair Value, Available-for-sale	$ 958	$ 889
Total Percent, Available-for-sale	0.03%	0.04%

Investment Securities - Summa_2

Investment Securities - Summary of Interest Income Earned on Investment Securities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net Investment Income [Line Items]
Total interest income from available-for-sale securities	$ 9,159	$ 10,049
Total interest income from held-to-maturity securities	3,940	3,998
Total investment income	13,099	14,047
Investment securities available-for-sale [Member]
Net Investment Income [Line Items]
Taxable	8,968	9,825
Tax-advantaged	191	224
Total interest income from available-for-sale securities	9,159	10,049
Investment securities held-to-maturity [Member]
Net Investment Income [Line Items]
Taxable	2,811	2,698
Tax-advantaged	1,129	1,300
Total interest income from held-to-maturity securities	$ 3,940	$ 3,998

Investment Securities - Summa_3

Investment Securities - Summary of Continuous Unrealized Loss Position of Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	$ 1,749,891	$ 169,193
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	(29,230)	(350)
Fair Value, 12 Months or Longer, Available-for-sale		0
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale		0
Fair Value, Available-for-sale	1,749,891	169,193
Gross Unrealized Holding Losses, Available-for-sale	(29,230)	(350)
CMO/REMIC [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	422,765	96,974
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	(6,821)	(249)
Fair Value, 12 Months or Longer, Available-for-sale		0
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale		0
Fair Value, Available-for-sale	422,765	96,974
Gross Unrealized Holding Losses, Available-for-sale	(6,821)	(249)
Mortgage-backed Securities [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	1,327,126	72,219
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	(22,409)	(101)
Fair Value, 12 Months or Longer, Available-for-sale		0
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale		0
Fair Value, Available-for-sale	1,327,126	72,219
Gross Unrealized Holding Losses, Available-for-sale	(22,409)	(101)
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale
Fair Value, 12 Months or Longer, Available-for-sale		0
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale		0
Fair Value, Available-for-sale		0
Gross Unrealized Holding Losses, Available-for-sale		$ 0

Investment Securities - Summa_4

Investment Securities - Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Due in one year or less, Amortized Cost, Held-to-maturity	$ 4,054
Due after one year through five years, Amortized Cost, Held-to-maturity	280,057
Due after five years through ten years, Amortized Cost, Held-to-maturity	133,106
Due after ten years, Amortized Cost, Held-to-maturity	669,767
Total Held-to-maturity, Debt Maturities, Amortized Cost Basis	1,086,984
Due in one year or less, Fair Value, Held-to-maturity	4,086
Due after one year through five years, Fair Value, Held-to-maturity	288,032
Due after five years through ten years, Fair Value, Held-to-maturity	134,081
Due after ten years, Fair Value, Held-to-maturity	659,282
Total, Held-to-maturity, Fair Value	1,085,481
Due in one year or less, Amortized Cost, Available-for-sale	4,821
Due after one year through five years, Amortized Cost, Available-for-sale	2,368,827
Due after five years through ten years, Amortized Cost, Available-for-sale	393,699
Due after ten years, Amortized Cost, Available-for-sale	30,643
Amortized Cost, Available-for-sale	2,797,990	$ 2,344,174
Due in one year or less, Fair Value, Available-for-sale	4,920
Due after one year through five years, Fair Value, Available-for-sale	2,383,641
Due after five years through ten years, Fair Value, Available-for-sale	392,160
Due after ten years, Fair Value, Available-for-sale	31,627
Total Available-for-sale Securities, Debt Maturities, Available-for-sale, Fair Value	$ 2,812,348	$ 2,398,923

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Investment securities pledged as collateral	$ 1,920,000,000	$ 1,810,000,000
Investment in FHLB stock, impairment losses	$ 0
Debt securities weighted average remaining contractual maturity term	19 years
United States [Member]
Debt Securities, Available-for-sale [Line Items]
Securities issued by U.S. government percentage	94.00%

Loans and Lease Finance Recei_3

Loans and Lease Finance Receivables and Allowance for Credit Losses - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended
	May 06, 2021	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)				0.87%	1.11%	1.12%
Secure borrowings and available lines of credit from FHLB and Federal Reserve Bank				$ 6,070,000,000		$ 6,070,000,000
Loans held-for-sale				0		0
Impaired, at carrying value				5,800,000
Allowance for Credit Losses				71,800,000
Reserve for credit risk for undisbursed commitments				9,000,000		9,000,000
Allocation of allowance to troubled debt restructuring				0		0
Increase in reserve for unfunded loan commitments				$ 0	$ 0
Percentage of Increase Decrease In Macro Economic Factors		5.50%	6.30%	6.40%
Allowance For Credit Losses Increase Decrease				$ 21,900,000
Allowance For Credit Losses Write Offs				2,400,000
Recapture of provision for credit losses				19,500,000
Due To Forecast Of Severe Economic Dowturn [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision For Credit Losses				$ 12,000,000
Subsequent Event [Member] | Due To Forecast Of Severe Economic Dowturn [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision For Credit Losses	$ 11,500,000
Forecast [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Increase Decrease In Macro Economic Factors			3.20%
GDP [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Increase Decrease In Macro Economic Factors				4.00%
GDP [Member] | Forecast [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Increase Decrease In Macro Economic Factors		2.80%
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)				71.73%
Notes receivable gross				$ 5,596,781,000		5,501,509,000
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)				67.49%
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance For Credit Losses Increase Decrease				$ 18,900,000
Performing Financing Receivable [Member] | Single-family Residential Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured				1,000,000
Performing Financing Receivable [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured				4,500,000
Performing Financing Receivable [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured				294,000
Loans, Excluding PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross				261,100,000
Loans, Excluding PCI Loans [Member] | Dairy & Livestock Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross				229,100,000		320,100,000
Loans, Excluding PCI Loans [Member] | Agribusiness Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross				$ 31,900,000		$ 41,000,000
Loans, Excluding PCI Loans [Member] | Loans Secured by Farmland [Member] | Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)				5.85%		5.72%
Notes receivable gross				$ 327,400,000		$ 314,400,000
Loans, Excluding PCI Loans [Member] | Loans Secured by Farmland [Member] | Loans Secured by Dairy & Livestock Land [Member] | Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross				129,200,000		132,900,000
Loans, Excluding PCI Loans [Member] | Loans Secured by Farmland [Member] | Loans Secured by Agricultural Land [Member] | Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross				$ 198,100,000		$ 181,500,000

Loans and Lease Finance Recei_4

Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Components of Loans and Lease Finance Receivables, Including PCI Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Construction	$ 96,356	$ 85,145
Total loans, at amortized cost	8,293,057	8,348,808
Less: Allowance for credit losses	(71,805)	(93,692)	$ (82,641)
Net loans and lease finance receivables	8,221,252	8,255,116
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	753,708	812,062
SBA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	307,727	303,896
SBA - Paycheck Protection Program (PPP) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	897,724
Less: Allowance for credit losses	0	0
Commercial real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	5,596,781	5,501,509
SFR mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	255,400	270,511
Dairy & livestock and agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	261,088	361,146
Municipal Lease Finance Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	42,349	45,547
Less: Allowance for credit losses	(35)	(74)	$ (277)
Consumer and other loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	$ 81,924	$ 86,006

Loans and Lease Finance Recei_5

Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of loans by type and origination year, according to our internal risk ratings (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
2021	$ 675,726	$ 2,129,465
2020	1,820,404	954,344
2019	918,378	804,015
2018	771,351	840,334
2017	782,919	666,584
Prior	2,475,232	1,975,259
Revolving loans amortized cost basis	774,746	924,822
Revolving loans converted to term loans	74,301	53,985
Total	8,293,057	8,348,808
Commercial real estate loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	293,370	988,831
2020	991,004	698,744
2019	690,560	639,959
2018	616,387	668,892
2017	628,881	570,031
Prior	2,144,913	1,710,506
Revolving loans amortized cost basis	185,651	198,663
Revolving loans converted to term loans	46,015	25,883
Total	5,596,781	5,501,509
Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	876	14,511
2020	19,034	9,350
2019	7,974	14,945
2018	14,153	2,258
2017	2,257	0
Prior	4	4
Revolving loans amortized cost basis	52,058	44,077
Revolving loans converted to term loans	0	0
Total	96,356	85,145
SBA [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	20,599	47,901
2020	44,593	12,821
2019	12,742	45,854
2018	44,039	69,788
2017	66,312	29,026
Prior	116,466	95,530
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	2,976	2,976
Total	307,727	303,896
SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	314,940	882,986
2020	582,784	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	897,724	882,986
Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	34,603	110,819
2020	103,977	169,991
2019	150,461	68,341
2018	64,613	59,353
2017	53,230	32,529
Prior	102,945	80,995
Revolving loans amortized cost basis	235,939	281,322
Revolving loans converted to term loans	7,940	8,712
Total	753,708	812,062
Dairy And Livestock And Agribusiness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	1,919
2020	2,216	1,765
2019	1,660	2,347
2018	1,708	6,373
2017	256	2,405
Prior	2,075	320
Revolving loans amortized cost basis	238,696	332,466
Revolving loans converted to term loans	14,477	13,551
Total	261,088	361,146
Municipal Lease Finance Receivables [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	8,478
2020	8,217	0
2019	0	2,556
2018	2,556	10,249
2017	10,248	3,586
Prior	21,328	20,678
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	42,349	45,547
SFR mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	7,745	65,463
2020	61,021	59,596
2019	53,148	29,142
2018	27,117	22,452
2017	20,857	27,421
Prior	85,084	66,002
Revolving loans amortized cost basis	2	3
Revolving loans converted to term loans	426	432
Total	255,400	270,511
Consumer Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	3,593	8,557
2020	7,558	2,077
2019	1,833	871
2018	778	969
2017	878	1,586
Prior	2,417	1,224
Revolving loans amortized cost basis	62,400	68,291
Revolving loans converted to term loans	2,467	2,431
Total	81,924	86,006
Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	661,202	2,112,914
2020	1,806,255	944,750
2019	903,769	763,869
2018	728,915	774,130
2017	709,596	640,874
Prior	2,371,362	1,893,124
Revolving loans amortized cost basis	741,275	880,898
Revolving loans converted to term loans	47,251	35,633
Total	7,969,625	8,046,192
Pass [Member] | Commercial real estate loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	282,950	979,499
2020	981,750	691,091
2019	678,640	607,753
2018	588,405	617,640
2017	569,006	550,105
Prior	2,063,996	1,646,876
Revolving loans amortized cost basis	180,542	192,583
Revolving loans converted to term loans	35,794	24,548
Total	5,381,083	5,310,095
Pass [Member] | Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	876	14,511
2020	19,034	9,350
2019	7,974	14,945
2018	6,380	2,258
2017	2,257	0
Prior	4	4
Revolving loans amortized cost basis	52,058	44,077
Revolving loans converted to term loans	0	0
Total	88,583	85,145
Pass [Member] | SBA [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	20,599	47,901
2020	44,593	12,821
2019	12,742	44,950
2018	43,163	58,839
2017	55,759	26,136
Prior	104,385	86,085
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	2,976	2,976
Total	284,217	279,708
Pass [Member] | SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	314,940	882,986
2020	581,281	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	896,221	882,986
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	31,474	104,478
2020	100,585	168,050
2019	147,772	62,453
2018	59,414	56,043
2017	50,335	32,149
Prior	97,792	76,019
Revolving loans amortized cost basis	219,271	257,250
Revolving loans converted to term loans	6,303	6,058
Total	712,946	762,500
Pass [Member] | Dairy And Livestock And Agribusiness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	1,041
2020	2,216	1,765
2019	1,660	1,199
2018	1,102	5,680
2017	256	120
Prior	391	320
Revolving loans amortized cost basis	227,667	319,211
Revolving loans converted to term loans	387	363
Total	233,679	329,699
Pass [Member] | Municipal Lease Finance Receivables [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	8,478
2020	8,217	0
2019	0	2,556
2018	2,556	10,249
2017	10,248	3,586
Prior	20,916	20,266
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	41,937	45,135
Pass [Member] | SFR mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	7,745	65,463
2020	61,021	59,596
2019	53,148	29,142
2018	27,117	22,452
2017	20,857	27,192
Prior	81,721	62,593
Revolving loans amortized cost basis	2	3
Revolving loans converted to term loans	0	0
Total	251,611	266,441
Pass [Member] | Consumer Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,618	8,557
2020	7,558	2,077
2019	1,833	871
2018	778	969
2017	878	1,586
Prior	2,157	961
Revolving loans amortized cost basis	61,735	67,774
Revolving loans converted to term loans	1,791	1,688
Total	79,348	84,483
Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	11,881	12,205
2020	11,035	8,243
2019	13,322	32,305
2018	35,678	50,344
2017	57,075	18,829
Prior	80,613	61,325
Revolving loans amortized cost basis	26,639	36,887
Revolving loans converted to term loans	17,479	3,659
Total	253,722	223,797
Special Mention [Member] | Commercial real estate loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	10,420	9,332
2020	9,254	7,162
2019	11,441	30,049
2018	25,826	43,870
2017	50,811	17,398
Prior	66,570	49,840
Revolving loans amortized cost basis	4,609	5,720
Revolving loans converted to term loans	9,890	994
Total	188,821	164,365
Special Mention [Member] | Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	7,773	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	7,773	0
Special Mention [Member] | SBA [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	5,446
2017	5,408	1,336
Prior	6,864	5,648
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	12,272	12,430
Special Mention [Member] | SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	486	1,995
2020	1,781	1,081
2019	1,881	1,892
2018	1,732	1,028
2017	856	95
Prior	4,798	4,882
Revolving loans amortized cost basis	10,485	17,395
Revolving loans converted to term loans	247	1,132
Total	22,266	29,500
Special Mention [Member] | Dairy And Livestock And Agribusiness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	878
2020	0	0
2019	0	364
2018	347	0
2017	0	0
Prior	1,684	0
Revolving loans amortized cost basis	11,029	13,255
Revolving loans converted to term loans	7,342	1,511
Total	20,402	16,008
Special Mention [Member] | Municipal Lease Finance Receivables [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	412	412
Total	412	412
Special Mention [Member] | SFR mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	195	452
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	195	452
Special Mention [Member] | Consumer Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	975	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	90	91
Revolving loans amortized cost basis	516	517
Revolving loans converted to term loans	0	22
Total	1,581	630
Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,643	4,346
2020	3,114	1,351
2019	1,287	7,841
2018	6,758	15,860
2017	16,248	6,881
Prior	23,257	20,810
Revolving loans amortized cost basis	6,832	7,037
Revolving loans converted to term loans	9,571	14,693
Total	69,710	78,819
Substandard [Member] | Commercial real estate loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	491
2019	479	2,157
2018	2,156	7,382
2017	9,064	2,528
Prior	14,347	13,790
Revolving loans amortized cost basis	500	360
Revolving loans converted to term loans	331	341
Total	26,877	27,049
Substandard [Member] | Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Substandard [Member] | SBA [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	904
2018	876	5,503
2017	5,145	1,554
Prior	5,217	3,797
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	11,238	11,758
Substandard [Member] | SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	1,503	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	1,503	0
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,643	4,346
2020	1,611	860
2019	808	3,996
2018	3,467	2,282
2017	2,039	285
Prior	355	94
Revolving loans amortized cost basis	6,183	6,677
Revolving loans converted to term loans	1,390	1,522
Total	18,496	20,062
Substandard [Member] | Dairy And Livestock And Agribusiness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	784
2018	259	693
2017	0	2,285
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	6,748	11,677
Total	7,007	15,439
Substandard [Member] | Municipal Lease Finance Receivables [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Substandard [Member] | SFR mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	229
Prior	3,168	2,957
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	426	432
Total	3,594	3,618
Substandard [Member] | Consumer Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	170	172
Revolving loans amortized cost basis	149	0
Revolving loans converted to term loans	676	721
Total	995	893
Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Doubtful [Member] | Commercial real estate loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Doubtful [Member] | Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Doubtful [Member] | SBA [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Doubtful [Member] | SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Doubtful [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Doubtful [Member] | Dairy And Livestock And Agribusiness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Doubtful [Member] | Municipal Lease Finance Receivables [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Doubtful [Member] | SFR mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Doubtful [Member] | Consumer Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	$ 0	$ 0

Loans and Lease Finance Recei_6

Loans and Lease Finance Receivables and Allowance for Credit Losses - Schedule of Balance and Activity Related to Allowance for Loan Losses for Held-for-Investment Loans by Type (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 93,692
Charge-offs	(2,475)	$ (86)
Recoveries	88	227
Provision for (Recapture of) loan losses	(19,500)	12,000
Ending Balance	71,805	82,641
Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		68,660
Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		1,840
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	75,439
Charge-offs	0	0
Recoveries	0
Provision for (Recapture of) loan losses	(18,867)	6,251
Ending Balance	56,572	58,427
Commercial Real Estate [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		48,629
Commercial Real Estate [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		3,547
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,934
Charge-offs	0	0
Recoveries	3	3
Provision for (Recapture of) loan losses	(59)	3,116
Ending Balance	1,878	4,632
Construction [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		858
Construction [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		655
Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,992
Charge-offs	0	0
Recoveries	4
Provision for (Recapture of) loan losses	(484)	675
Ending Balance	2,512	3,946
Small Business Administration [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		1,453
Small Business Administration [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		1,818
SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	0
Charge-offs	0
Recoveries	0
Provision for (Recapture of) loan losses	0
Ending Balance	0
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	7,142
Charge-offs	(2,475)	0
Recoveries	2	2
Provision for (Recapture of) loan losses	1,770	2,947
Ending Balance	6,439	9,387
Commercial and Industrial [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		8,880
Commercial and Industrial [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		(2,442)
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3,949
Charge-offs	0	0
Recoveries	0
Provision for (Recapture of) loan losses	(1,227)	(803)
Ending Balance	2,722	4,266
Dairy & Livestock and Agribusiness [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		5,255
Dairy & Livestock and Agribusiness [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		(186)
Municipal Lease Finance Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	74
Charge-offs	0	0
Recoveries	0
Provision for (Recapture of) loan losses	(39)	70
Ending Balance	35	277
Municipal Lease Finance Receivables [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		623
Municipal Lease Finance Receivables [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		(416)
SFR Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	367
Charge-offs	0	0
Recoveries	79	206
Provision for (Recapture of) loan losses	(148)	(221)
Ending Balance	298	281
SFR Mortgage [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		2,339
SFR Mortgage [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		(2,043)
Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,795
Charge-offs	0	(86)
Recoveries	0	16
Provision for (Recapture of) loan losses	(446)	(35)
Ending Balance	$ 1,349	1,425
Consumer and Other Loans [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		623
Consumer and Other Loans [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		$ 907

Loans and Lease Finance Recei_7

Loans and Lease Finance Receivables and Allowance for Credit Losses - Schedule of Recorded Investment in, and Aging of, Past Due and Nonaccrual Loans, Including PCI Loans by Class of Loans (Detail) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 13,324,000	$ 15,949,000
Nonaccrual	13,769,000	14,347,000
Loans Not Past Due	8,279,733,000	8,332,859,000
Nonaccrual with No Allowance for Credit Losses	11,713,000	12,556,000
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	8,293,057,000	8,348,808,000
30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,175,000	1,139,000
Nonaccrual		2,000
60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	900,000	3,226,000
Nonaccrual	400,000	1,300,000
Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	11,249,000	11,584,000
Nonaccrual	11,200,000	11,600,000
Commercial Real Estate Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	7,145,000	7,208,000
Nonaccrual	7,395,000	7,563,000
Loans Not Past Due	2,165,178,000	2,136,051,000
Nonaccrual with No Allowance for Credit Losses	7,395,000	7,563,000
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	2,172,323,000	2,143,259,000
Commercial Real Estate Owner Occupied [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Commercial Real Estate Owner Occupied [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	211,000	0
Commercial Real Estate Owner Occupied [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	6,934,000	7,208,000
Commercial Real Estate Non-owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	178,000	0
Nonaccrual	0	0
Loans Not Past Due	3,424,280,000	3,358,250,000
Nonaccrual with No Allowance for Credit Losses	0	0
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	3,424,458,000	3,358,250,000
Commercial Real Estate Non-owner Occupied [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	178,000	0
Commercial Real Estate Non-owner Occupied [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Commercial Real Estate Non-owner Occupied [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Construction Speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due		0
Nonaccrual	0	0
Loans Not Past Due	80,857,000	72,126,000
Nonaccrual with No Allowance for Credit Losses	0	0
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	80,857,000	72,126,000
Construction Speculative [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Construction Speculative [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Construction Speculative [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Construction Non-speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due		0
Nonaccrual	0	0
Loans Not Past Due	15,499,000	13,019,000
Nonaccrual with No Allowance for Credit Losses	0	0
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	15,499,000	13,019,000
Construction Non-speculative [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Construction Non-speculative [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Construction Non-speculative [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Small Business Administration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,286,000	3,971,000
Nonaccrual	2,412,000	2,273,000
Loans Not Past Due	306,441,000	299,925,000
Nonaccrual with No Allowance for Credit Losses	2,076,000	2,035,000
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	307,727,000	303,896,000
Small Business Administration [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	258,000	531,000
Small Business Administration [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	2,415,000
Small Business Administration [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,028,000	1,025,000
SBA - Paycheck Protection Program (PPP) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due		0
Nonaccrual	0	0
Loans Not Past Due	897,724,000	882,986,000
Nonaccrual with No Allowance for Credit Losses	0	0
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	897,724,000	882,986,000
SBA - Paycheck Protection Program (PPP) [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
SBA - Paycheck Protection Program (PPP) [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
SBA - Paycheck Protection Program (PPP) [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	3,747,000	3,757,000
Nonaccrual	2,967,000	3,129,000
Loans Not Past Due	749,961,000	808,305,000
Nonaccrual with No Allowance for Credit Losses	1,506,000	1,576,000
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	753,708,000	812,062,000
Commercial and Industrial [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	452,000	608,000
Commercial and Industrial [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	689,000	811,000
Commercial and Industrial [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,606,000	2,338,000
Dairy & Livestock and Agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	259,000	784,000
Nonaccrual	259,000	785,000
Loans Not Past Due	260,829,000	360,362,000
Nonaccrual with No Allowance for Credit Losses	0	785,000
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	261,088,000	361,146,000
Dairy & Livestock and Agribusiness [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Dairy & Livestock and Agribusiness [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Dairy & Livestock and Agribusiness [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	259,000	784,000
Municipal Lease Finance Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due		0
Nonaccrual	0	0
Loans Not Past Due	42,349,000	45,547,000
Nonaccrual with No Allowance for Credit Losses	0	430,000
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	42,349,000	45,547,000
Municipal Lease Finance Receivables [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Municipal Lease Finance Receivables [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Municipal Lease Finance Receivables [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
SFR Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	495,000	229,000
Nonaccrual	424,000	430,000
Loans Not Past Due	254,905,000	270,282,000
Nonaccrual with No Allowance for Credit Losses	424,000	0
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	255,400,000	270,511,000
SFR Mortgage [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	266,000	0
SFR Mortgage [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
SFR Mortgage [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	229,000	229,000
Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	214,000	0
Nonaccrual	312,000	167,000
Loans Not Past Due	81,710,000	86,006,000
Nonaccrual with No Allowance for Credit Losses	312,000	167,000
Loans Past Due Over 89 Days Still Accruing	0	0
Total loans	81,924,000	86,006,000
Consumer and Other Loans [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	21,000	0
Consumer and Other Loans [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	0
Consumer and Other Loans [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 193,000	$ 0

Loans and Lease Finance Recei_8

Loans and Lease Finance Receivables and Allowance for Credit Losses - Schedule of Recorded Investment in, and Aging of, Past Due and Nonaccrual Loans, Including PCI Loans by Class of Loans (Parenthetical) (Detail) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing loans, current	$ 2,100,000	$ 1,400,000
Nonaccrual	13,769,000	14,347,000
Nonaccrual loans		184,000
30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual		2,000
60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	400,000	1,300,000
90+ Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 11,200,000	$ 11,600,000

Loans and Lease Finance Recei_9

Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Activity Related to Troubled Debt Restructurings (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Performing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	$ 2,159	$ 3,112
New modifications	4,643	0
Payoffs/payments, net and other	(989)	(299)
TDRs returned to accrual status	0	0
TDRs placed on nonaccrual status	0	0
Ending balance	5,813	2,813
Nonperforming TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	0	244
New modifications	0	0
Charge-offs	0	0
Payoffs/payments, net and other	0	(244)
TDRs returned to accrual status	0	0
TDRs placed on nonaccrual status	0	0
Ending balance	0	0
Total TDRs	$ 5,813	$ 2,813

Loans and Lease Finance Rece_10

Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Recorded Investment in Collateral-Dependent loans (Detail) $ in Thousands	Mar. 31, 2021USD ($)Collateral	Dec. 31, 2020USD ($)Collateral
Financing Receivable, Modifications [Line Items]
Real Estate	$ 10,672	$ 10,712
Business Assets	8,385	6,653
Other	$ 311	$ 280
Number of Loans Dependent on Collateral | Collateral	46	41
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 7,689	$ 7,883
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral | Collateral	8	8
Construction [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0	$ 0
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral | Collateral	11	0
Small Business Administration [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 1,826	$ 1,761
Business Assets	418	326
Other	$ 168	$ 185
Number of Loans Dependent on Collateral | Collateral	0	10
SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0	$ 0
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral | Collateral	0	0
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 421	$ 470
Business Assets	7,708	5,542
Other	$ 143	$ 95
Number of Loans Dependent on Collateral | Collateral	21	18
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0	$ 0
Business Assets	259	785
Other	$ 0	$ 0
Number of Loans Dependent on Collateral | Collateral	1	1
Municipal Lease Finance Receivables [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0	$ 0
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral | Collateral	0	0
SFR Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 424	$ 430
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral | Collateral	2	2
Consumer and Other Loans [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 312	$ 168
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral | Collateral	3	2

Loans and Lease Finance Rece_11

Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Loans Modified as Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)AgreementContract
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Agreement	2
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 4,643
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	4,643
Troubled debt restructurings, Outstanding Recorded Investment	4,443
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0
Commercial Real Estate Owner Occupied [Member] | Interest rate reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0
Troubled debt restructurings, Outstanding Recorded Investment	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0
Commercial Real Estate Owner Occupied [Member] | Change in Amortization Period [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0
Troubled debt restructurings, Outstanding Recorded Investment	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0
Commercial and Industrial Loans [Member] | Interest rate reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Agreement	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0
Troubled debt restructurings, Outstanding Recorded Investment	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0
Commercial and Industrial Loans [Member] | Change in Amortization Period [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Agreement	2
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 4,643
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	4,643
Troubled debt restructurings, Outstanding Recorded Investment	4,443
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0
SFR Mortgage [Member] | Interest rate reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Agreement	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0
Troubled debt restructurings, Outstanding Recorded Investment	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0
SFR Mortgage [Member] | Change in Amortization Period [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Agreement	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0
Troubled debt restructurings, Outstanding Recorded Investment	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0

Earnings Per Share Reconcilia_3

Earnings Per Share Reconciliation - Additional Information (Detail) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per common share	117,000	269,000

Earnings Per Share Reconcilia_4

Earnings Per Share Reconciliation - Schedule of Earnings Per Common Share Reconciliation (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings per common share:
Net earnings	$ 63,893	$ 37,980
Less: Net earnings allocated to restricted stock	309	83
Net earnings allocated to common shareholders	$ 63,584	$ 37,897
Weighted average shares outstanding	135,175	139,107
Basic earnings per common share	$ 0.47	$ 0.27
Diluted earnings per common share:
Net income allocated to common shareholders	$ 63,584	$ 37,897
Weighted average shares outstanding	135,175	139,107
Incremental shares from assumed exercise of outstanding options	253	209
Diluted weighted average shares outstanding	135,428	139,316
Diluted earnings per common share	$ 0.47	$ 0.27

Fair Value Information - Assets

Fair Value Information - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, liabilities	$ 521,038	$ 469,587
Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets	0	0
Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets	14,692	30,181
Interest rate swaps, liabilities	14,692	30,181
Fair Value on Recurring Basis [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0	0
Total liabilities	0	0
Fair Value on Recurring Basis [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	2,827,040	2,429,104
Total liabilities	14,692	30,181
Fair Value on Recurring Basis [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0	0
Total liabilities	0	0
Fair Value on Recurring Basis [Member] | Municipal Bonds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | Municipal Bonds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	29,886	30,285
Fair Value on Recurring Basis [Member] | Municipal Bonds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | Residential Mortgage-backed Securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | Residential Mortgage-backed Securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	2,191,338	1,904,935
Fair Value on Recurring Basis [Member] | Residential Mortgage-backed Securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | CMO/REMIC - Residential [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | CMO/REMIC - Residential [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	590,166	462,814
Fair Value on Recurring Basis [Member] | CMO/REMIC - Residential [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | Other Securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | Other Securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	958	889
Fair Value on Recurring Basis [Member] | Other Securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | Investment Securities-AFS [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | Investment Securities-AFS [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	2,812,348	2,398,923
Fair Value on Recurring Basis [Member] | Investment Securities-AFS [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | Interest Rate Swaps [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets	0	0
Interest rate swaps, liabilities	0	0
Fair Value on Recurring Basis [Member] | Interest Rate Swaps [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets	14,692	30,181
Interest rate swaps, liabilities	14,692	30,181
Fair Value on Recurring Basis [Member] | Interest Rate Swaps [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets	0	0
Interest rate swaps, liabilities	0	0
Fair Value on Recurring Basis [Member] | Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	2,827,040	2,429,104
Total liabilities	14,692	30,181
Fair Value on Recurring Basis [Member] | Carrying Value [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	29,886	30,285
Fair Value on Recurring Basis [Member] | Carrying Value [Member] | Residential Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	2,191,338	1,904,935
Fair Value on Recurring Basis [Member] | Carrying Value [Member] | CMO/REMIC - Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	590,166	462,814
Fair Value on Recurring Basis [Member] | Carrying Value [Member] | Other Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	958	889
Fair Value on Recurring Basis [Member] | Carrying Value [Member] | Investment Securities-AFS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	2,812,348	2,398,923
Fair Value on Recurring Basis [Member] | Carrying Value [Member] | Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets	14,692	30,181
Interest rate swaps, liabilities	$ 14,692	$ 30,181

Fair Value Information - Asse_2

Fair Value Information - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - Fair Value on Non-Recurring Basis [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Description of assets
Total assets	$ 428	$ 3,040
Loans, Excluding PCI Loans [Member] | Asset Held-for-Sale [Member]
Description of assets
Total assets	0	0
Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	307	2,316
Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	19	24
Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	0	0
Loans, Excluding PCI Loans [Member] | Construction [Member]
Description of assets
Total assets	0	0
Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member]
Description of assets
Total assets	0	0
Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	102	0
Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	0	0
Loans, Excluding PCI Loans [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	0	700
Loans, Excluding PCI Loans [Member] | Muncipal Lease Finance Receivables [Member]
Description of assets
Total assets	0	0
Level 1 [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Asset Held-for-Sale [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Construction [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Muncipal Lease Finance Receivables [Member]
Description of assets
Total assets	0	0
Level 2 [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Asset Held-for-Sale [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Construction [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Muncipal Lease Finance Receivables [Member]
Description of assets
Total assets	0	0
Level 3 [Member]
Description of assets
Total assets	2,605	6,617
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Asset Held-for-Sale [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	2,248	4,266
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	97	76
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Construction [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	260	0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	0	2,275
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Muncipal Lease Finance Receivables [Member]
Description of assets
Total assets	0	0
Carrying Value [Member]
Description of assets
Total assets	2,605	6,617
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Asset Held-for-Sale [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	2,248	4,266
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	97	76
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Construction [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	260	0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	0	2,275
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Muncipal Lease Finance Receivables [Member]
Description of assets
Total assets	$ 0	$ 0

Fair Value Information - Estima

Fair Value Information - Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Assets
Total cash and cash equivalents	$ 1,525,299	$ 1,958,160	$ 705,739	$ 185,518
Investment securities available-for-sale	2,812,348	2,398,923
Investment securities held-to-maturity	1,086,984	578,626
Total loans, net of allowance for loan losses	8,221,252	8,255,116
Deposits:
Interest-bearing	4,500,816	4,281,114
Junior subordinated debentures	25,774	25,774
Swaps	521,038	469,587
Carrying Value [Member]
Assets
Total cash and cash equivalents	1,525,299	1,958,160
Interest-earning balances due from depository institutions	27,748	43,563
Investment securities available-for-sale	2,812,348	2,398,923
Investment securities held-to-maturity	1,086,984	578,626
Total loans, net of allowance for loan losses	8,221,252	8,255,116
Swaps	14,692	30,181
Deposits:
Interest-bearing	4,500,816	4,281,114
Borrowings	511,346	444,406
Junior subordinated debentures	25,774	25,774
Swaps	14,692	30,181
Estimated Fair Value [Member]
Assets
Total cash and cash equivalents	1,525,299	1,958,160
Interest-earning balances due from depository institutions	27,748	43,600
Investment securities available-for-sale	2,812,348	2,398,923
Investment securities held-to-maturity	1,085,481	604,223
Total loans, net of allowance for loan losses	8,231,707	8,256,178
Swaps	14,692	30,181
Deposits:
Interest-bearing	4,500,611	4,281,952
Borrowings	504,563	444,349
Junior subordinated debentures	20,351	19,431
Swaps	14,692	30,181
Estimated Fair Value [Member] | Level 1 [Member]
Assets
Total cash and cash equivalents	1,525,299	1,958,160
Interest-earning balances due from depository institutions	0	0
Investment securities available-for-sale	0	0
Investment securities held-to-maturity	0	0
Total loans, net of allowance for loan losses	0	0
Swaps	0	0
Deposits:
Interest-bearing	0	0
Borrowings	0	0
Junior subordinated debentures	0	0
Swaps	0	0
Estimated Fair Value [Member] | Level 2 [Member]
Assets
Total cash and cash equivalents	0	0
Interest-earning balances due from depository institutions	27,748	43,600
Investment securities available-for-sale	2,812,348	2,398,923
Investment securities held-to-maturity	1,085,481	604,223
Total loans, net of allowance for loan losses	0	0
Swaps	14,692	30,181
Deposits:
Interest-bearing	4,500,611	4,281,952
Borrowings	504,563	444,349
Junior subordinated debentures	0	0
Swaps	14,692	30,181
Estimated Fair Value [Member] | Level 3 [Member]
Assets
Total cash and cash equivalents	0	0
Interest-earning balances due from depository institutions	0	0
Investment securities available-for-sale	0	0
Investment securities held-to-maturity	0	0
Total loans, net of allowance for loan losses	8,231,707	8,256,178
Swaps	0	0
Deposits:
Interest-bearing	0	0
Borrowings	0	0
Junior subordinated debentures	20,351	19,431
Swaps	$ 0	$ 0

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2021USD ($)Agreement	Dec. 31, 2020USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets and liabilities offset in balance sheet	$ 0
Total notional amount of the Company's swaps	$ 509,500,000	$ 503,800,000
Description of Conditions Relating to Clearing of Interest rate Swaps	As a result of the Bank exceeding $10 billion in assets, federal regulations required the Bank, beginning in January 2019, to clear most interest rate swaps through a clearing house (“centrally cleared”). These instruments contain language outlining collateral pledging requirements for each counterparty, in which collateral must be posted if market value exceeds certain agreed upon threshold limits. Cash or securities are pledged as collateral.
Interest-rate Swap Agreements with Customers [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest-rate swap agreements | Agreement	148
Total notional amount of the Company's swaps	$ 509,500,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Fair Value of Derivative Instruments (Detail) - Derivatives Not Designated as Hedging Instruments [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 14,692	$ 30,181
Other Assets [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	14,692	30,181
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	14,692	30,181
Other Liabilities [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 14,692	$ 30,181

Derivative Financial Instrume_5

Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statement of Earnings (Detail) - Derivatives Not Designated as Hedging Instruments [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivatives, Fair Value [Line Items]
Amount of Gain Recognized in Income on Derivative Instruments	$ 215	$ 373
Interest Rate Swaps [Member] | Other Income [Member]
Derivatives, Fair Value [Line Items]
Amount of Gain Recognized in Income on Derivative Instruments	$ 215	$ 373

Other Comprehensive Income - Su

Other Comprehensive Income - Summary of Components of OCI (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Equity [Abstract]
Net change in fair value recorded in accumulated OCI, Before-tax	$ (40,391)	$ 36,619
Net change in fair value recorded in accumulated OCI, Tax effect	11,941	(10,826)
Net change in fair value recorded in accumulated OCI, After-tax	(28,450)	25,793
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, Before-tax	81	(1)
Amortization of unrealized gains (losses) on securities transferred from available-for-sale to held-to-maturity, Tax effect	(24)	0
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, After-tax	57	(1)
Net change, Before-tax	(40,310)	36,618
Net change, Tax effect	11,917	(10,826)
Net change, After-tax	$ (28,393)	$ 25,792

Balance Sheet Offsetting - Sche

Balance Sheet Offsetting - Schedule of Balance Sheet Offsetting (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Offsetting Assets Liabilities [Line Items]
Financial liabilities, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	$ 534,172	$ 469,840
Financial liabilities, Gross Amounts Offset in the Condensed Consolidated Balance Sheets	(13,134)	(253)
Financial liabilities, Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets	521,038	469,587
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	13,134	253
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(589,033)	(547,333)
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	(54,861)	(77,493)
Repurchase Agreements [Member]
Offsetting Assets Liabilities [Line Items]
Financial liabilities, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	506,346	439,406
Financial liabilities, Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Financial liabilities, Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets	506,346	439,406
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	0	0
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(543,551)	(483,603)
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	(37,205)	(44,197)
Interest Rate Swaps [Member]
Offsetting Assets Liabilities [Line Items]
Financial assets, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	14,692	30,181
Financial assets, Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Financial assets, Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets	0	0
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	14,692	30,181
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	0	0
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	14,692	30,181
Interest Rate Swaps [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Offsetting Assets Liabilities [Line Items]
Financial assets, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	14,692	30,181
Financial assets, Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Financial assets, Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets	0	0
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	14,692	30,181
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	0	0
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	14,692	30,181
Financial liabilities, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	27,826	30,434
Financial liabilities, Gross Amounts Offset in the Condensed Consolidated Balance Sheets	(13,134)	(253)
Financial liabilities, Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets	14,692	30,181
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	13,134	253
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(45,482)	(63,730)
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	$ (17,656)	$ (33,296)

Leases - Components of lease co

Leases - Components of lease costs and supplemental information related to leases (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Lease Assets and Liabilities
ROU assets	$ 20,340		$ 19,112
Total lease liabilities	22,237		$ 21,164
Lease Cost
Operating lease expense	1,662	$ 1,623
Sublease income	0	0
Total lease expense	1,662	1,623
Other Information
Operating cash outflows from operating leases, net	$ 1,819	$ 1,935
Lease Term and Discount Rate
Weighted average remaining lease term (years)	4 years 4 months 24 days		4 years 1 month 28 days
Weighted average discount rate	2.63%		2.80%

Leases - Future lease payments

Leases - Future lease payments required for leases that have initial or remaining non-cancelable lease terms (Detail) $ in Thousands	Mar. 31, 2021USD ($)
2021 (excluding the three months ended March 31, 2021)	$ 5,142
2022	6,031
2023	4,279
2024	3,107
2025	2,433
Thereafter	2,499
Total future lease payments	23,491
Less: Imputed interest	(1,254)
Present value of lease liabilities	$ 22,237

Revenue Recognition - Summary o

Revenue Recognition - Summary of Non Interest Income, Segregated by Revenue Streams in-Scope and Out-of-Scope of Topic 606 (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Noninterest income:
Gain on OREO, net	$ 399	$ 0
Other	1,682	1,798
Total noninterest income	13,681	11,640
Service Charges on Deposit Accounts [Member]
Noninterest income:
Revenue from contract with customer	3,985	4,776
Trust and Investment Services [Member]
Noninterest income:
Revenue from contract with customer	2,611	2,420
Bankcard Services [Member]
Noninterest income:
Revenue from contract with customer	350	577
Accounting Standards Update 2014-09 [Member]
Noninterest income:
Gain on OREO, net	429	10
Other	1,682	1,798
Total noninterest income	9,057	9,581
Accounting Standards Update 2014-09 [Member] | Service Charges on Deposit Accounts [Member]
Noninterest income:
Revenue from contract with customer	3,985	4,776
Accounting Standards Update 2014-09 [Member] | Trust and Investment Services [Member]
Noninterest income:
Revenue from contract with customer	2,611	2,420
Accounting Standards Update 2014-09 [Member] | Bankcard Services [Member]
Noninterest income:
Revenue from contract with customer	350	577
Accounting Standards Update 2014-09 Not Adopted [Member]
Noninterest income:
Total noninterest income	$ 4,624	$ 2,059