CVB Financial (CVBF) 10-Q 6 Nov 20 2020 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Oct. 30, 2020
Cover [Abstract]
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0000354647
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Document Period End Date	Sep. 30, 2020
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, 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		135,505,605

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 145,455	$ 158,310
Interest-earning balances due from Federal Reserve	1,339,498	27,208
Total cash and cash equivalents	1,484,953	185,518
Interest-earning balances due from depository institutions	44,367	2,931
Investment securities available-for-sale, at fair value (with amortized cost of $2,150,364 at September 30, 2020, and $1,718,357 at December 31, 2019)	2,205,646	1,740,257
Investment securities held-to-maturity (with fair value of $603,522 at September 30, 2020, and $678,948 at December 31, 2019)	577,694	674,452
Total investment securities	2,783,340	2,414,709
Investment in stock of Federal Home Loan Bank (FHLB)	17,688	17,688
Loans and lease finance receivables	8,407,872	7,564,577
Allowance for credit losses	(93,869)	(68,660)
Net loans and lease finance receivables	8,314,003	7,495,917
Premises and equipment, net	51,477	53,978
Bank owned life insurance (BOLI)	228,132	226,281
Accrued interest receivable	30,004	28,122
Intangibles	35,804	42,986
Goodwill	663,707	663,707
Other real estate owned (OREO)	4,189	4,889
Income taxes	21,412	35,587
Other assets	139,635	110,137
Total assets	13,818,711	11,282,450
Deposits:
Noninterest-bearing	6,919,423	5,245,517
Interest-bearing	4,249,411	3,459,411
Total deposits	11,168,834	8,704,928
Customer repurchase agreements	483,420	428,659
Other borrowings	10,000
Deferred compensation	21,259	22,666
Junior subordinated debentures	25,774	25,774
Other liabilities	127,467	106,325
Total liabilities	11,836,754	9,288,352
Stockholders' Equity
Common stock, authorized, 225,000,000 shares without par; issued and outstanding 135,509,143 at September 30, 2020, and 140,102,480 at December 31, 2019	1,210,646	1,298,792
Retained earnings	735,218	682,692
Accumulated other comprehensive income, net of tax	36,093	12,614
Total stockholders' equity	1,981,957	1,994,098
Total liabilities and stockholders' equity	$ 13,818,711	$ 11,282,450

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Amortized cost	$ 2,150,364	$ 1,718,357
Fair Value, Held-to-maturity	$ 603,522	$ 678,948
Common stock, par value	$ 0	$ 0
Common stock, authorized	225,000,000	225,000,000
Common stock, shares issued	135,509,143	140,102,480
Common stock, shares outstanding	135,509,143	140,102,480

Condensed Consolidated Statemen

Condensed Consolidated Statements of Earnings and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest income:
Loans and leases, including fees	$ 94,200	$ 98,796	$ 281,669	$ 300,326
Investment securities:
Investment securities available-for-sale	8,447	9,222	26,945	29,985
Investment securities held-to-maturity	3,375	4,298	11,033	13,249
Total investment income	11,822	13,520	37,978	43,234
Dividends from FHLB stock	215	301	761	931
Interest-earning deposits with other institutions	389	946	1,285	1,140
Total interest income	106,626	113,563	321,693	345,631
Interest expense:
Deposits	2,958	4,589	10,077	12,553
Borrowings and customer repurchase agreements	232	568	972	3,555
Junior subordinated debentures	111	247	444	771
Total interest expense	3,301	5,404	11,493	16,879
Net interest income before provision for credit losses	103,325	108,159	310,200	328,752
Provision for credit losses	0	1,500	23,500	5,000
Net interest income after provision for credit losses	103,325	106,659	286,700	323,752
Noninterest income:
BOLI income	1,469	1,797	5,211	4,482
Gain on OREO, net	13		23	129
Gain on sale of building, net	1,680		1,680	4,545
Gain on eminent domain condemnation, net			0	5,685
Other	3,160	2,297	8,736	6,944
Total noninterest income	13,153	11,894	36,945	46,402
Noninterest expense:
Salaries and employee benefits	31,034	30,122	90,617	88,286
Occupancy and equipment	5,275	4,879	15,143	15,730
Professional services	2,019	1,688	6,643	5,653
Computer software expense	2,837	2,663	8,407	8,032
Marketing and promotion	728	1,517	3,538	4,149
Amortization of intangible assets	2,292	2,648	7,182	8,338
Acquisition related expenses		244		6,005
Other	5,403	3,774	13,097	13,474
Total noninterest expense	49,588	47,535	144,627	149,667
Earnings before income taxes	66,890	71,018	179,018	220,487
Income taxes	19,398	20,595	51,915	63,941
Net earnings	47,492	50,423	127,103	156,546
Other comprehensive income:
Unrealized (loss) gain on securities arising during the period, before tax	(2,004)	5,423	33,334	43,136
Less: Reclassification adjustment for net gain on securities included in net income	0	(5)	0	(5)
Other comprehensive (loss) income, before tax	(2,004)	5,418	33,334	43,131
Less: Income tax benefit (expense) related to items of other comprehensive income	593	(1,602)	(9,855)	(12,751)
Other comprehensive (loss) income, net of tax	(1,411)	3,816	23,479	30,380
Comprehensive income	$ 46,081	$ 54,239	$ 150,582	$ 186,926
Basic earnings per common share	$ 0.35	$ 0.36	$ 0.93	$ 1.12
Diluted earnings per common share	$ 0.35	$ 0.36	$ 0.93	$ 1.12
Service Charges on Deposit Accounts [Member]
Noninterest income:
Revenue from contract with customer, including assessed tax	$ 3,970	$ 4,833	$ 12,555	$ 15,039
Trust and Investment Services [Member]
Noninterest income:
Revenue from contract with customer, including assessed tax	2,405	2,330	7,302	6,964
Bankcard Services [Member]
Noninterest income:
Revenue from contract with customer, including assessed tax	$ 456	$ 637	$ 1,438	$ 2,614

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2018	$ 1,851,190		$ 1,293,669	$ 575,805		$ (18,284)
Beginning balance, shares at Dec. 31, 2018			140,000
Repurchase of common stock	(1,535)		$ (1,535)
Repurchase of common stock, shares			(70)
Exercise of stock options	2,212		$ 2,212
Exercise of stock options, shares			160
Shares issued pursuant to stock-based compensation plan	3,792		$ 3,792
Shares issued pursuant to stock-based compensation plan, shares			67
Cash dividends declared on common stock	(75,692)			(75,692)
Net earnings	156,546			156,546
Other comprehensive income (loss)	30,380					30,380
Ending balance at Sep. 30, 2019	1,966,893		$ 1,298,138	656,659		12,096
Ending balance, shares at Sep. 30, 2019			140,157
Beginning balance at Jun. 30, 2019	1,936,677		$ 1,296,885	631,512		8,280
Beginning balance, shares at Jun. 30, 2019			140,142
Repurchase of common stock	(723)		$ (723)
Repurchase of common stock, shares			(34)
Exercise of stock options	155		$ 155
Exercise of stock options, shares			15
Shares issued pursuant to stock-based compensation plan	1,821		$ 1,821
Shares issued pursuant to stock-based compensation plan, shares			34
Cash dividends declared on common stock	(25,276)			(25,276)
Net earnings	50,423			50,423
Other comprehensive income (loss)	3,816					3,816
Ending balance at Sep. 30, 2019	1,966,893		$ 1,298,138	656,659		12,096
Ending balance, shares at Sep. 30, 2019			140,157
Beginning balance at Dec. 31, 2019	1,994,098		$ 1,298,792	682,692		12,614
Beginning balance, shares at Dec. 31, 2019			140,102
Cumulative adjustment upon adoption of ASU 2016-13 at Dec. 31, 2019		$ (1,325)			$ (1,325)
Repurchase of common stock	(92,687)		$ (92,687)
Repurchase of common stock, shares			(5,004)
Exercise of stock options	168		$ 168
Exercise of stock options, shares			14
Shares issued pursuant to stock-based compensation plan	4,373		$ 4,373
Shares issued pursuant to stock-based compensation plan, shares			397
Cash dividends declared on common stock	(73,252)			(73,252)
Net earnings	127,103			127,103
Other comprehensive income (loss)	23,479					23,479
Ending balance at Sep. 30, 2020	1,981,957		$ 1,210,646	735,218		36,093
Ending balance, shares at Sep. 30, 2020			135,509
Beginning balance at Jun. 30, 2020	1,959,098		$ 1,209,449	712,145		37,504
Beginning balance, shares at Jun. 30, 2020			135,516
Repurchase of common stock	(257)		$ (257)
Repurchase of common stock, shares			(15)
Exercise of stock options	47		$ 47
Exercise of stock options, shares			4
Shares issued pursuant to stock-based compensation plan	1,407		$ 1,407
Shares issued pursuant to stock-based compensation plan, shares			4
Cash dividends declared on common stock	(24,419)			(24,419)
Net earnings	47,492			47,492
Other comprehensive income (loss)	(1,411)					(1,411)
Ending balance at Sep. 30, 2020	$ 1,981,957		$ 1,210,646	$ 735,218		$ 36,093
Ending balance, shares at Sep. 30, 2020			135,509

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends per common share	$ 0.18	$ 0.18	$ 0.54	$ 0.54

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows from Operating Activities
Interest and dividends received	$ 301,634	$ 331,953
Service charges and other fees received	29,918	31,441
Interest paid	(10,975)	(16,155)
Net cash paid to vendors, employees and others	(136,948)	(140,482)
Income taxes	(45,610)	(59,347)
Net cash provided by operating activities	138,019	147,410
Cash Flows from Investing Activities
Net change in interest-earning balances from depository institutions	(41,436)	1,997
Proceeds from sale of investment securities held-for-sale	0	152,644
Proceeds from repayment of investment securities available-for-sale	426,684	268,766
Proceeds from maturity of investment securities available-for-sale	3,506	6,059
Purchases of investment securities available-for-sale	(870,934)	(225,416)
Proceeds from repayment and maturity of investment securities held-to-maturity	106,491	81,001
Purchases of investment securities held-to-maturity	(11,210)	(42,917)
Net increase in equity investments	(2,890)	(3,511)
Net (increase) decrease in loan and lease finance receivables	(815,151)	289,490
Proceeds on eminent domain condemnation, net	0	5,685
Proceeds from sale of building, net of selling costs	2,131	5,487
Purchase of premises and equipment	(2,444)	(3,061)
Proceeds from BOLI death benefit	4,589	1,509
Proceeds from sales of other real estate owned	0	523
Net cash (used in) provided by investing activities	(1,200,664)	538,256
Cash Flows from Financing Activities
Net increase in other deposits	2,465,066	37,061
Net decrease in time deposits	(1,160)	(70,221)
Net increase (decrease) in other borrowings	10,000	(275,086)
Net increase (decrease) in customer repurchase agreements	54,761	(34,405)
Cash dividends on common stock	(74,068)	(70,092)
Repurchase of common stock	(92,687)	(1,535)
Proceeds from exercise of stock options	168	2,212
Net cash provided by (used in) financing activities	2,362,080	(412,066)
Net increase in cash and cash equivalents	1,299,435	273,600
Cash and cash equivalents, beginning of period	185,518	163,948
Cash and cash equivalents, end of period	1,484,953	437,548
Reconciliation of Net Earnings to Net Cash Provided by Operating Activities
Net earnings	127,103	156,546
Adjustments to reconcile net earnings to net cash provided by operating activities:
Gain on sale of investment securities, net	0	(5)
Gain on eminent domain condemnation, net	0	(5,685)
Gain on sale of building, net	(1,680)	(4,545)
Gain on sale of other real estate owned	0	(105)
Increase in BOLI	(4,028)	(5,592)
Net amortization of premiums and discounts on investment securities	10,181	7,593
Accretion of discount for acquired loans, net	(13,106)	(22,369)
Provision for credit losses	23,500	5,000
Valuation allowance on other real estate owned	700	0
Stock-based compensation	4,373	3,792
Depreciation and amortization, net	2,173	16,993
Change in other assets and liabilities	(11,197)	(4,213)
Total adjustments	10,916	(9,136)
Net cash provided by operating activities	138,019	147,410
Supplemental Disclosure of Non-cash Investing Activities
Transfer of loans to other real estate owned	$ 0	$ 9,450

Business

Business	9 Months Ended
	Sep. 30, 2020
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 as “we,” “our” or the “Company”) 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	9 Months Ended
	Sep. 30, 2020
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	9 Months Ended
	Sep. 30, 2020
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 (“Form 10-K”). Use of Estimates in the Preparation of Financial Statements Adoption of New Accounting Standard Provision and Allowance for Credit Losses No. 2016-13, held-to-maturity available-for-sale The Company adopted this ASU using the modified retrospective method for all financial assets measured at amortized cost and off-balance The Company developed an allowance model that calculates reserves over the life of the loan and is largely driven by portfolio characteristics, risk grading, macroeconomic variables and the associated economic outlook, as well as other key methodology assumptions. The allowance is based upon historical lifetime loss rate models segregated by three loan segments: Commercial and Industrial, Commercial Real Estate, and Consumer Retail. In addition to determining the quantitative life of loan loss rate to be applied against the portfolio segments, the ASU indicates management has the opportunity to layer on current conditions and forecast adjustments to ensure that the life of loan loss rate reflects both the current state of the portfolio, and expectations for macroeconomic changes in the near future. We utilized a single economic forecast that is based on probability weighted scenarios to incorporate macroeconomic uncertainty over a 2 or 3-year Beginning in the second half of March 2020, the broader economy experienced a significant deterioration in the economic environment driven by the COVID-19 pandemic resulting in adverse changes to the forecasted macroeconomic variables utilized in our modeling processes. This economic deterioration, coupled with the implementation of the expected loss methodology for determining our provision for credit losses, have contributed to an increased provision for credit losses of million in the first half of 2020. We continue to monitor the impact on the economy from COVID-19 closely, as well as any effects that may result from the CARES Act. The extent to which the COVID-19 pandemic will impact our operations and financial results during the final quarter of 2020 is uncertain, but we may experience increased provision for credit losses if the COVID-19 pandemic results in additional economic stress on our borrowers and loan portfolios.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2020
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 September 30, 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 $ 1,710,160 $ 46,713 $ (2) $ 1,756,871 79.65% CMO/REMIC 404,380 7,326 (212) 411,494 18.66% Municipal bonds 35,011 1,457 - 36,468 1.65% Other securities 813 - - 813 0.04% Total available-for-sale $ 2,150,364 $ 55,496 $ (214) $ 2,205,646 100.00% Investment securities held-to-maturity: Government agency/GSE $ 103,317 $ 6,627 $ - $ 109,944 17.88% Mortgage-backed securities 152,285 7,837 - 160,122 26.36% CMO/REMIC 159,676 5,315 - 164,991 27.64% Municipal bonds 162,416 6,387 (338) 168,465 28.12% Total held-to-maturity $ 577,694 $ 26,166 $ (338) $ 603,522 100.00% December 31, 2019 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 $ 1,185,757 $ 21,306 $ (750) $ 1,206,313 69.32% CMO/REMIC 493,214 1,392 (896) 493,710 28.37% Municipal bonds 38,506 850 (2) 39,354 2.26% Other securities 880 - - 880 0.05% Total available-for-sale $ 1,718,357 $ 23,548 $ (1,648) $ 1,740,257 100.00% Investment securities held-to-maturity: Government agency/GSE $ 117,366 $ 2,280 $ (657) $ 118,989 17.40% Mortgage-backed securities 168,479 2,083 (54) 170,508 24.98% CMO/REMIC 192,548 - (2,458) 190,090 28.55% Municipal bonds 196,059 3,867 (565) 199,361 29.07% Total held-to-maturity $ 674,452 $ 8,230 $ (3,734) $ 678,948 100.00% 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 Nine Months Ended 2020 2019 2020 2019 (Dollars in thousands) Investment securities available-for-sale: Taxable $ 8,244 $ 8,949 $ 26,313 $ 29,079 Tax-advantaged 203 273 632 906 Total interest income from available-for-sale 8,447 9,222 26,945 29,985 Investment securities held-to-maturity: Taxable 2,265 2,883 7,410 8,725 Tax-advantaged 1,110 1,415 3,623 4,524 Total interest income from held-to-maturity 3,375 4,298 11,033 13,249 Total interest income from investment securities $ 11,822 $ 13,520 $ 37,978 $ 43,234 The adoption of CECL did not have a material impact on the accounting for investment securities, as approximately 93% of the total investment securities portfolio at September 30, 2020 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 available-for-sale held-to-maturity The following table presents the Company’s available-for-sale September 30, 2020 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 $ 30,851 $ (2) $ - $ - $ 30,851 $ (2) CMO/REMIC 71,781 (212) - - 71,781 (212) Municipal bonds - - - - - - Total available-for-sale $ 102,632 $ (214) $ - $ - $ 102,632 $ (214) The table below presents the Company’s investment securities’ gross unrealized losses and fair value by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2019, prior to adoption of ASU 2016-13. December 31, 2019 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 $ 20,289 $ (6) $ 97,964 $ (744) $ 118,253 $ (750) CMO/REMIC 177,517 (705) 34,565 (191) 212,082 (896) Municipal bonds - - 563 (2) 563 (2) Total available-for-sale $ 197,806 $ (711) $ 133,092 $ (937) $ 330,898 $ (1,648) Investment securities held-to-maturity: Government agency/GSE $ 28,359 $ (252) $ 19,405 $ (405) $ 47,764 $ (657) Mortgage-backed securities 10,411 (54) - - 10,411 (54) CMO/REMIC 23,897 (104) 166,193 (2,354) 190,090 (2,458) Municipal bonds 7,583 (32) 29,981 (533) 37,564 (565) Total held-to-maturity $ 70,250 $ (442) $ 215,579 $ (3,292) $ 285,829 $ (3,734) At September 30, 2020 and December 31, 2019, investment securities having a carrying value of approximately $1.86 billion and $1.64 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 September 30, 2020, by contractual maturity, are shown in the table below. Although mortgage-backed and CMO/REMIC securities have weighted average remaining contractual maturities of approximately 17 years, expected maturities will differ from contractual maturities because borrowers may have the right to prepay such obligations without penalty . September 30, 2020 Available-for-sale Held-to-maturity Amortized Fair Value Amortized Fair Value (Dollars in thousands) Due in one year or less $ 27,816 $ 27,968 $ 2,730 $ 2,764 Due after one year through five years 1,960,912 2,012,028 327,785 341,060 Due after five years through ten years 119,315 121,652 81,246 84,329 Due after ten years 42,321 43,998 165,933 175,369 Total investment securities $ 2,150,364 $ 2,205,646 $ 577,694 $ 603,522 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 impairment losses have been recorded as of September 30, 2020.

Loans and Lease Finance Receiva

Loans and Lease Finance Receivables and Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2020
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. September 30, 2020 December 31, 2019 (Dollars in thousands) Commercial and industrial $ 817,056 $ 935,127 SBA 304,987 305,008 SBA - Paycheck Protection Program (PPP) 1,101,142 - Real estate: Commercial real estate 5,428,223 5,374,617 Construction 101,903 116,925 SFR mortgage 274,731 283,468 Dairy & livestock and agribusiness 252,802 383,709 Municipal lease finance receivables 38,040 53,146 Consumer and other loans 88,988 116,319 Total loans 8,407,872 7,568,319 Less: Deferred loan fees, net (1) - (3,742 ) Total loans, net of deferred loan fees 8,407,872 7,564,577 Less: Allowance for credit losses (93,869 ) (68,660 ) Total loans and lease finance receivables, net $ 8,314,003 $ 7,495,917 (1) Beginning with March 31, 2020, gross loans are presented net of deferred loan fees by respective class of financing receivables. As of September 30, 2020, 69.04% of the Company’s total gross loan portfolio consisted of real estate loans, with commercial real estate loans representing 64.56% 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 September 30, 2020, $271.2 million, or 5.00% of the total commercial real estate loans included loans secured by farmland, compared to $241.8 million, or 4.50%, at December 31, 2019. The loans secured by farmland included $121.1 million for loans secured by dairy & livestock land and $150.2 million for loans secured by agricultural land at September 30, 2020, compared to $125.9 million for loans secured by dairy & livestock land and $115.9 million for loans secured by agricultural land at December 31, 2019. As of September 30, 2020, dairy & livestock and agribusiness loans of $252.8 million were comprised of $210.4 million for dairy & livestock loans and $42.4 million for agribusiness loans, compared to $323.5 million for dairy & livestock loans and $60.2 million for agribusiness loans at December 31, 2019. At September 30, 2020 and December 31, 2019, loans totaling $6.00 billion and $6.03 billion, respectively, were pledged to secure the borrowings and available lines of credit from the FHLB and the Federal Reserve Bank. There were no outstanding loans held-for-sale Credit Quality Indicators 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. Loans are monitored by line and credit management personnel on an ongoing basis 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 (Credit Quality Indicators): 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 date presented. Origination Year Revolving Revolving September 30, 2020 2020 2019 2018 2017 2016 Prior Total (Dollars in thousands) Commercial and Risk Rating: Pass $ 81,480 $ 170,738 $ 72,345 $ 62,918 $ 41,860 $ 80,669 $ 255,407 $ 8,153 $ 773,570 Special Mention - 1,235 3,087 814 241 5,015 15,970 1,022 27,384 Substandard 4,545 111 1,500 1,815 448 8 6,472 1,203 16,102 Doubtful & Loss - - - - - - - - - Total Commercial and $ 86,025 $ 172,084 $ 76,932 $ 65,547 $ 42,549 $ 85,692 $ 277,849 $ 10,378 $ 817,056 SBA loans: Risk Rating: Pass $ 37,389 $ 13,394 $ 46,193 $ 72,665 $ 26,687 $ 88,255 $ - $ 2,873 $ 287,456 Special Mention - - - 1,113 1,352 6,910 - - 9,375 Substandard - - 955 1,998 1,546 3,657 - - 8,156 Doubtful & Loss - - - - - - - - - Total SBA loans: $ 37,389 $ 13,394 $ 47,148 $ 75,776 $ 29,585 $ 98,822 $ - $ 2,873 $ 304,987 SBA - PPP loans: Risk Rating: Pass $ 1,101,142 $ - $ - $ - $ - $ - $ - $ - $ 1,101,142 Special Mention - - - - - - - - - Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total SBA - PPP loans: $ 1,101,142 $ - $ - $ - $ - $ - $ - $ - $ 1,101,142 Commercial real estate loans: Risk Rating: Pass $ 617,068 $ 701,648 $ 680,997 $ 684,519 $ 589,553 $ 1,776,989 $ 201,021 $ 26,329 $ 5,278,124 Special Mention 4,619 11,125 18,168 21,767 13,865 48,591 5,447 297 123,879 Substandard - 793 3,815 5,497 1,281 14,597 237 - 26,220 Doubtful & Loss - - - - - - - - - Total Commercial real estate loans: $ 621,687 $ 713,566 $ 702,980 $ 711,783 $ 604,699 $ 1,840,177 $ 206,705 $ 26,626 $ 5,428,223 Construction loans: Risk Rating: Pass $ 11,160 $ 8,614 $ 14,399 $ 15,667 $ 10,592 $ 4 $ 41,467 $ - $ 101,903 Special Mention - - - - - - - - - Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Construction loans: $ 11,160 $ 8,614 $ 14,399 $ 15,667 $ 10,592 $ 4 $ 41,467 $ - $ 101,903 SFR mortgage loans: Risk Rating: Pass $ 52,050 $ 62,087 $ 33,614 $ 25,069 $ 28,344 $ 69,215 $ - $ - $ 270,379 Special Mention 15 - - - - 456 - - 471 Substandard - 238 - - 229 2,974 - 440 3,881 Doubtful & Loss - - - - - - - - - Total SFR mortgage loans: $ 52,065 $ 62,325 $ 33,614 $ 25,069 $ 28,573 $ 72,645 $ - $ 440 $ 274,731 Origination Year Revolving Revolving September 30, 2020 2020 2019 2018 2017 2016 Prior Total (Dollars in thousands) Dairy & livestock and agribusiness loans: Risk Rating: Pass $ 742 $ 2,201 $ 1,675 $ 5,709 $ 152 $ 341 $ 210,610 $ 494 $ 221,924 Special Mention 13 - - - - - 11,596 1,631 13,240 Substandard - - 849 703 2,985 - 824 12,277 17,638 Doubtful & Loss - - - - - - - - - Total Dairy & livestock and agribusiness loans: $ 755 $ 2,201 $ 2,524 $ 6,412 $ 3,137 $ 341 $ 223,030 $ 14,402 $ 252,802 Municipal lease finance receivables loans: Risk Rating: Pass $ 123 $ - $ 2,556 $ 10,436 $ 3,587 $ 20,926 $ - $ - $ 37,628 Special Mention - - - - - 412 - - 412 Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Municipal lease finance receivables loans: $ 123 $ - $ 2,556 $ 10,436 $ 3,587 $ 21,338 $ - $ - $ 38,040 Consumer and other Risk Rating: Pass $ 5,483 $ 2,334 $ 971 $ 1,068 $ 1,714 $ 1,380 $ 72,501 $ 1,994 $ 87,445 Special Mention - - - - - 91 737 - 828 Substandard - - - - - 174 - 541 715 Doubtful & Loss - - - - - - - - - Total Consumer and other loans: $ 5,483 $ 2,334 $ 971 $ 1,068 $ 1,714 $ 1,645 $ 73,238 $ 2,535 $ 88,988 Gross loans: Risk Rating: Pass $ 1,906,637 $ 961,016 $ 852,750 $ 878,051 $ 702,489 $ 2,037,779 $ 781,006 $ 39,843 $ 8,159,571 Special Mention 4,647 12,360 21,255 23,694 15,458 61,475 33,750 2,950 175,589 Substandard 4,545 1,142 7,119 10,013 6,489 21,410 7,533 14,461 72,712 Doubtful & Loss - - - - - - - - - Total Gross loans: $ 1,915,829 $ 974,518 $ 881,124 $ 911,758 $ 724,436 $ 2,120,664 $ 822,289 $ 57,254 $ 8,407,872 The following table summarizes loans by type, according to our internal risk ratings as of the date presented. December 31, 2019 Pass Special Substandard Doubtful & Total (Dollars in thousands) Commercial and industrial $ 895,234 $ 35,473 $ 4,420 $ - $ 935,127 SBA 283,430 11,032 10,546 - 305,008 Real estate: Commercial real estate Owner occupied 1,977,007 78,208 28,435 - 2,083,650 Non-owner 3,280,580 10,005 382 - 3,290,967 Construction Speculative 106,895 - - - 106,895 Non-speculative 10,030 - - - 10,030 SFR mortgage 280,010 1,957 1,501 - 283,468 Dairy & livestock and agribusiness 320,670 35,920 27,119 - 383,709 Municipal lease finance receivables 52,676 470 - - 53,146 Consumer and other loans 114,870 421 1,028 - 116,319 Total gross loans $ 7,321,402 $ 173,486 $ 73,431 $ - $ 7,568,319 Allowance for Credit Losses The allowance for credit losses for 2020 is based upon historical lifetime loss rate models segregated by three loan segments: Commercial and Industrial, Commercial Real Estate, and Consumer Retail. 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 Our allowance for credit losses decreased in the third quarter by $114,000, as a result of net charge-offs of $114,000. There was no provision for credit losses in the third quarter of 2020. Our allowance for credit losses at September 30, 2020 was $93.9 million or 1.12% of total loans. For the nine months ended September 30, 2020, the ACL increased by $25.2 million, including a $1.8 million increase from the adoption of CECL on January 1, 2020. The increase in the ACL was primarily due to $23.5 million in provision for credit losses recorded in the first half of 2020 resulting from the forecasted changes in macroeconomic variables related to the COVID -19 in this baseline forec as t re-opening its currently f Management believes that the ACL was appropriate at September 30, 2020 and December 31, 2019. There is a high degree of uncertainty around the epidemiological assumptions and impact of government responses to the pandemic that impact our economic forecast, so 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 September 30, 2020 Ending Balance Charge-offs Recoveries Provision for Ending Balance (Dollars in thousands) Commercial and industrial $ 7,991 $ (161 ) $ 2 $ 761 $ 8,593 SBA 3,651 (47 ) 69 (169 ) 3,504 SBA - PPP - - - - - Real estate: Commercial real estate 74,928 - - (473 ) 74,455 Construction 2,290 - 3 (355 ) 1,938 SFR mortgage 222 - - 15 237 Dairy & livestock and agribusiness 3,379 - - 330 3,709 Municipal lease finance receivables 302 - - (153 ) 149 Consumer and other loans 1,220 (23 ) 43 44 1,284 Total allowance for credit losses $ 93,983 $ (231 ) $ 117 $ - $ 93,869 Three Months Ended September 30, 2019 Ending Balance Charge-offs Recoveries Provision for Ending Balance (Dollars in thousands) Commercial and industrial $ 7,857 $ - $ 94 $ 287 $ 8,238 SBA 1,119 (65 ) - 412 1,466 Real estate: Commercial real estate 48,287 - - 624 48,911 Construction 871 - 3 55 929 SFR mortgage 2,323 - 8 44 2,375 Dairy & livestock and agribusiness 5,341 - - 88 5,429 Municipal lease finance receivables 726 - - (64 ) 662 Consumer and other loans 608 (3 ) 3 54 662 Total allowance for loan losses $ 67,132 $ (68 ) $ 108 $ 1,500 $ 68,672 Nine Months Ended September 30, 2020 Ending Balance, 2016-13 Impact of ASU 2016-13 Charge-offs Recoveries Provision for Ending Balance (Dollars in thousands) Commercial and industrial $ 8,880 $ (2,442 ) $ (172 ) $ 7 $ 2,320 $ 8,593 SBA 1,453 1,818 (203 ) 72 364 3,504 SBA - PPP - - - - - - Real estate: Commercial real estate 48,629 3,547 - - 22,279 74,455 Construction 858 655 - 9 416 1,938 SFR mortgage 2,339 (2,043 ) - 206 (265 ) 237 Dairy & livestock and agribusiness 5,255 (186 ) - - (1,360 ) 3,709 Municipal lease finance receivables 623 (416 ) - - (58 ) 149 Consumer and other loans 623 907 (109 ) 59 (196 ) 1,284 Total allowance for credit losses $ 68,660 $ 1,840 $ (484 ) $ 353 $ 23,500 $ 93,869 Nine Months Ended September 30, 2019 Ending Balance Charge-offs Recoveries Provision for Ending Balance (Dollars in thousands) Commercial and industrial $ 7,528 $ (48 ) $ 253 $ 505 $ 8,238 SBA 1,078 (295 ) 9 674 1,466 Real estate: Commercial real estate 45,097 - - 3,814 48,911 Construction 981 - 9 (61 ) 929 SFR mortgage 2,197 - 191 (13 ) 2,375 Dairy & livestock and agribusiness 5,225 (78 ) 19 263 5,429 Municipal lease finance receivables 775 - - (113 ) 662 Consumer and other loans 732 (7 ) 6 (69 ) 662 Total allowance for loan losses $ 63,613 $ (428 ) $ 487 $ 5,000 $ 68,672 The following table presents the recorded investment in loans held-for-investment September 30, 2019 Recorded Investment in Loans Allowance for Loan Losses Individually Collectively Individually Collectively (Dollars in thousands) Commercial and industrial $ 1,638 $ 920,040 $ 254 $ 7,984 SBA 3,248 316,323 286 1,180 Real estate: Commercial real estate 1,500 5,374,168 - 48,911 Construction - 119,931 - 929 SFR mortgage 3,009 275,635 - 2,375 Dairy & livestock and agribusiness - 311,229 - 5,429 Municipal lease finance receivables - 54,468 - 662 Consumer and other loans 385 116,743 - 662 Total $ 9,780 $ 7,488,537 $ 540 $ 68,132 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 loan losses, and to determine the adequacy of the ACL, 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 loan 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 date presented. September 30, 2020 30-59 Days 60-89 Days Greater than Past Due Total Past Due Loans Not Total Loans (Dollars in thousands) Commercial and industrial $ 3,582 $ 1,209 $ 560 $ 5,351 $ 811,705 $ 817,056 SBA 468 270 777 1,515 303,472 304,987 SBA - PPP - - - - 1,101,142 1,101,142 Real estate: Commercial real estate Owner occupied - - 3,770 3,770 2,121,430 2,125,200 Non-owner - - 1,715 1,715 3,301,308 3,303,023 Construction Speculative (1) - - - - 94,232 94,232 Non-speculative - - - - 7,671 7,671 SFR mortgage - - 467 467 274,264 274,731 Dairy & livestock and agribusiness - 849 - 849 251,953 252,802 Municipal lease finance receivables - - - - 38,040 38,040 Consumer and other loans 68 - 34 102 88,886 88,988 Total gross loans $ 4,118 $ 2,328 $ 7,323 $ 13,769 $ 8,394,103 $ 8,407,872 (1) Speculative construction loans are generally for properties where there is no identified buyer or renter. Following the adoption of CECL on January 1, 2020, the definitions of impairment and related impaired loan disclosures were removed. Under CECL, amortized cost of our finance receivables and loans that are on nonaccrual status, including loans with no allowance, are presented as of September 30, 2020 by type of loan. September 30, 2020 Nonaccrual Total Loans Past 89 Days Still (Dollars in thousands) Commercial and industrial $ 1,421 $ 1,822 $ - SBA 850 1,724 - SBA - PPP - - - Real estate: Commercial real estate Owner occupied 4,766 4,766 - Non-owner - 1,715 - Construction Speculative (2) - - - Non-speculative - - - SFR mortgage 675 675 - Dairy & livestock and agribusiness 849 849 - Municipal lease finance receivables - - - Consumer and other loans 224 224 - Total gross loans $ 8,785 $ 11,775 $ - (1) As of September 30, 2020, $1.8 million of nonaccruing loans were current, $571,000 were 30-59 60-89 (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. (3) Excludes $51,000 of guaranteed portion of nonaccrual SBA loans that are in process of collection. The following table presents the recorded investment in, and the aging of, past due and nonaccrual loans, by type of loans as of the date presented. December 31, 2019 30-59 Days 60-89 Days Total Past Due Nonaccrual (1) (3) Current Total Loans (Dollars in thousands) Commercial and industrial $ 2 $ - $ 2 $ 1,266 $ 933,859 $ 935,127 SBA 870 532 1,402 2,032 301,574 305,008 Real estate: Commercial real estate Owner occupied - - - 479 2,083,171 2,083,650 Non-owner - - - 245 3,290,722 3,290,967 Construction Speculative (2) - - - - 106,895 106,895 Non-speculative - - - - 10,030 10,030 SFR mortgage 6 243 249 878 282,341 283,468 Dairy & livestock and agribusiness - - - - 383,709 383,709 Municipal lease finance receivables - - - - 53,146 53,146 Consumer and other loans - - - 377 115,942 116,319 Total gross loans $ 878 $ 775 $ 1,653 $ 5,277 $ 7,561,389 $ 7,568,319 (1) As of December 31, 2019, $1.2 million of nonaccruing loans were current, $59,000 were 30-59 60-89 (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. (3) Excludes $2.0 million of guaranteed portion of nonaccrual SBA loans that are in process of collection. Impaired Loans (prior to adoption of CECL) Following the adoption of CECL as of January 1, 2020, the definitions of impairment and related impaired loan disclosures were removed. As a result of the change, the following tables present information about our impaired loans and lease finance receivables, individually evaluated for impairment by type of loans, as of September 30, 2019 and December 31, 2019, prior to the date of adoption of the amendments to the credit loss standard. As of and For the Nine Months Ended Recorded Unpaid Related Average Interest (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 1,382 $ 1,537 $ - $ 1,560 $ 4 SBA 2,447 3,554 - 2,606 31 Real estate: Commercial real estate Owner occupied 494 614 - 508 - Non-owner occupied 1,006 1,190 - 1,052 21 Construction Speculative - - - - - Non-speculative - - - - - SFR mortgage 3,009 3,338 - 3,059 62 Dairy & livestock and agribusiness - - - - - Municipal lease finance receivables - - - - - Consumer and other loans 385 516 - 401 - Total 8,723 10,749 - 9,186 118 With a related allowance recorded: Commercial and industrial 256 345 254 829 - SBA 801 816 286 816 - Real estate: Commercial real estate Owner occupied - - - - - Non-owner occupied - - - - - Construction Speculative - - - - - Non-speculative - - - - - SFR mortgage - - - - - Dairy & livestock and agribusiness - - - - - Municipal lease finance receivables - - - - - Consumer and other loans - - - - - Total 1,057 1,161 540 1,645 - Total impaired loans $ 9,780 $ 11,910 $ 540 $ 10,831 $ 118 December 31, 2019 Recorded Unpaid Related (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 1,091 $ 1,261 $ - SBA 2,243 2,734 - Real estate: Commercial real estate Owner occupied 479 613 - Non-owner 642 643 - Construction Speculative - - - Non-speculative - - - SFR mortgage 2,979 3,310 - Dairy & livestock and agribusiness - - - Municipal lease finance receivables - - - Consumer and other loans 377 514 - Total 7,811 9,075 - With a related allowance recorded: Commercial and industrial 253 347 251 SBA 325 324 257 Real estate: Commercial real estate Owner occupied - - - Non-owner - - - Construction Speculative - - - Non-speculative - - - SFR mortgage - - - Dairy & livestock and agribusiness - - - Municipal lease finance receivables - - - Consumer and other loans - - - Total 578 671 508 Total impaired loans $ 8,389 $ 9,746 $ 508 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 date presented. September 30, 2020 Number of Real Estate Business Assets Other (Dollars in thousands) Commercial and industrial $ 145 $ 4,703 $ 62 14 SBA 1,015 497 7 11 SBA - PPP - - - - Real estate: Commercial real estate 6,836 - - 7 Construction - - - - SFR mortgage 675 - - 3 Dairy & livestock and agribusiness - 849 - 1 Municipal lease finance receivables - - - - Consumer and other loans 203 - 20 4 Total collateral-dependent loans $ 8,874 $ 6,049 $ 89 40 Reserve for Unfunded Loan Commitments The allowance for off-balance off-balance 2016-13, Troubled Debt Restructurings (“TDRs”) Loans that are reported as TDRs are considered nonperforming and charge-off Summary of Significant Accounting Policies, 10-K As of September 30, 2020, there were $2.2 million of loans classified as a TDR, all of which The majority of TDRs have no specific allowance allocated as any impairment amount is normally charged off at the time a probable loss is determined. We have no allocated allowance to TDRs as of September 30, 2020 and December 31, 2019. The following table provides a summary of the activity related to TDRs for the periods presented. Three Months Ended Nine Months Ended 2020 2019 2020 2019 (Dollars in thousands) Performing TDRs: Beginning balance $ 2,771 $ 3,219 $ 3,112 $ 3,594 New modifications - - - - Payoffs/payments, net and other (554 ) (51 ) (895 ) (426 ) TDRs returned to accrual status - - - - TDRs placed on nonaccrual status - - - - Ending balance $ 2,217 $ 3,168 $ 2,217 $ 3,168 Nonperforming TDRs: Beginning balance $ - $ 263 $ 244 $ 3,509 New modifications - - - - Charge-offs - - - (78 ) Transfer to OREO - - - (2,275 ) Payoffs/payments, net and other - (14 ) (244 ) (907 ) TDRs returned to accrual status - - - - TDRs placed on nonaccrual status - - - - Ending balance $ - $ 249 $ - $ 249 Total TDRs $ 2,217 $ 3,417 $ 2,217 $ 3,417 As of September 30, 2020 and 2019, there were no loans that were modified as TDRs during the nine months ended September 30, 2020 and 2019, respectively. There were no loans that were previously modified as a TDR within the previous 12 months that subsequently defaulted during the nine months ended September 30, 2020 and 2019. In accordance with regulatory guidance, if borrowers are less than 30 days past due on their loans, upon implementation of the modification program, or as allowed under the CARES Act if borrowers are less than 30 days past due on their loans as of December 31, 2019, and enter into short-term loan modifications offered as a result of COVID-19, COVID-19, COVID-19,

Earnings Per Share Reconciliati

Earnings Per Share Reconciliation	9 Months Ended
	Sep. 30, 2020
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 and nine months ended September 30, 2020, shares deemed to be antidilutive, and thus excluded from the computation of earnings per common share, were 517,000 and 361,000, respectively. For the three and nine months ended September 30, 2019, shares deemed to be antidilutive, and thus excluded from the computation of earnings per common share, were 240,000 and 184,000, 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 Nine Months Ended 2020 2019 2020 2019 (In thousands, except per share amounts) Earnings per common share: Net earnings $ 47,492 $ 50,423 $ 127,103 $ 156,546 Less: Net earnings allocated to restricted stock 175 116 407 390 Net earnings allocated to common shareholders $ 47,317 $ 50,307 $ 126,696 $ 156,156 Weighted average shares outstanding 135,017 139,824 136,369 139,730 Basic earnings per common share $ 0.35 $ 0.36 $ 0.93 $ 1.12 Diluted earnings per common share: Net income allocated to common shareholders $ 47,317 $ 50,307 $ 126,696 $ 156,156 Weighted average shares outstanding 135,017 139,824 136,369 139,730 Incremental shares from assumed exercise of outstanding options 167 151 167 217 Diluted weighted average shares outstanding 135,184 139,975 136,536 139,947 Diluted earnings per common share $ 0.35 $ 0.36 $ 0.93 $ 1.12

Fair Value Information

Fair Value Information	9 Months Ended
	Sep. 30, 2020
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 following disclosure provides the fair value information for financial assets and liabilities as of September 30, 2020. The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels (Level 1, Level 2 and Level 3). · Level 1 · Level 2 · Level 3 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 Active Markets for Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Mortgage-backed securities $ 1,756,871 $ - $ 1,756,871 $ - CMO/REMIC 411,494 - 411,494 - Municipal bonds 36,468 - 36,468 - Other securities 813 - 813 - Total investment securities - AFS 2,205,646 - 2,205,646 - Interest rate swaps 37,255 - 37,255 - Total assets $ 2,242,901 $ - $ 2,242,901 $ - Description of liability Interest rate swaps $ 37,255 $ - $ 37,255 $ - Total liabilities $ 37,255 $ - $ 37,255 $ - Carrying Value at Quoted Prices in Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Mortgage-backed securities $ 1,206,313 $ - $ 1,206,313 $ - CMO/REMIC 493,710 - 493,710 - Municipal bonds 39,354 - 39,354 - Other securities 880 - 880 - Total investment securities - AFS 1,740,257 - 1,740,257 - Interest rate swaps 11,502 - 11,502 - Total assets $ 1,751,759 $ - $ 1,751,759 $ - Description of liability Interest rate swaps $ 11,502 $ - $ 11,502 $ - Total liabilities $ 11,502 $ - $ 11,502 $ - 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 For the Nine Months Ended (Dollars in thousands) Description of assets Loans: Commercial and industrial $ 3,273 $ - $ - $ 3,273 $ 2,034 SBA 712 - - 712 203 Real estate: Commercial real estate 1,715 - - 1,715 1,295 Construction - - - - - SFR mortgage - - - - - Dairy & livestock and agribusiness - - - - - Consumer and other loans - - - - - Other real estate owned 2,275 - - 2,275 700 Asset held-for-sale - - - - - Total assets $ 7,975 $ - $ - $ 7,975 $ 4,232 Carrying Value at Quoted Prices in Significant Other Significant Total Losses (Dollars in thousands) Description of assets Impaired loans: Commercial and industrial $ 253 $ - $ - $ 253 $ 251 SBA 359 - - 359 513 Real estate: Commercial real estate - - - - - Construction - - - - - SFR mortgage - - - - - Dairy & livestock and agribusiness - - - - - Consumer and other loans - - - - - Other real estate owned 444 - - 444 64 Asset held-for-sale - - - - - Total assets $ 1,056 $ - $ - $ 1,056 $ 828 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 September 30, 2020 and December 31, 2019, respectively. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. September 30, 2020 Carrying Estimated Fair Value Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 1,484,953 $ 1,484,953 $ - $ - $ 1,484,953 Interest-earning balances due from depository 44,367 - 44,414 - 44,414 Investment securities available-for-sale 2,205,646 - 2,205,646 - 2,205,646 Investment securities held-to-maturity 577,694 - 603,522 - 603,522 Total loans, net of allowance for credit losses 8,314,003 - - 8,326,796 8,326,796 Swaps 37,255 - 37,255 - 37,255 Liabilities Deposits: Interest-bearing $ 4,249,411 $ - $ 4,250,728 $ - $ 4,250,728 Borrowings 493,420 - 493,344 - 493,344 Junior subordinated debentures 25,774 - - 18,917 18,917 Swaps 37,255 - 37,255 - 37,255 December 31, 2019 Carrying Estimated Fair Value Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 185,518 $ 185,518 $ - $ - $ 185,518 Interest-earning balances due from depository 2,931 - 2,938 - 2,938 Investment securities available-for-sale 1,740,257 - 1,740,257 - 1,740,257 Investment securities held-to-maturity 674,452 - 678,948 - 678,948 Total loans, net of allowance for loan losses 7,495,917 - - 7,343,167 7,343,167 Swaps 11,502 - 11,502 - 11,502 Liabilities Deposits: Interest-bearing $ 3,459,411 $ - $ 3,457,922 $ - $ 3,457,922 Borrowings 428,659 - 428,330 - 428,330 Junior subordinated debentures 25,774 - - 20,669 20,669 Swaps 11,502 - 11,502 - 11,502 The fair value estimates presented herein are based on pertinent information available to management as of September 30, 2020 and December 31, 2019. 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	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020, the Bank has entered into 133 interest-rate swap agreements with customers with a notional amount totaling $455.2 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 September 30, 2020 and December 31, 2019, the total notional amount of the Company’s swaps was $455.2 million, and $260.0 million, respectively. The location of the asset and liability, and their respective fair values, are summarized in the tables below. September 30, 2020 Asset Derivatives Liability Derivatives Balance Sheet Fair Balance Sheet Fair (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 37,255 Other liabilities $ 37,255 Total derivatives $ 37,255 $ 37,255 December 31, 2019 Asset Derivatives Liability Derivatives Balance Sheet Fair Balance Sheet Fair (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 11,502 Other liabilities $ 11,502 Total derivatives $ 11,502 $ 11,502 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 statement of earnings for the periods presented. Derivatives Not Designated as Hedging Instruments Location of Gain Recognized in Amount of Gain Recognized in Income Three Months Ended Nine Months Ended 2020 2019 2020 2019 (Dollars in thousands) Interest rate swaps Other income $ 1,591 $ 378 $ 4,149 $ 1,135 Total $ 1,591 $ 378 $ 4,149 $ 1,135

Other Comprehensive Income

Other Comprehensive Income	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 2019 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 $ (1,974 ) $ 584 $ (1,390 ) $ 5,672 $ (1,677 ) $ 3,995 Amortization of net unrealized losses on securities transferred from available-for-sale held-to-maturity (30 ) 9 (21 ) (249 ) 74 (175 ) Net realized gain reclassified into earnings (1) - - - (5 ) 1 (4 ) Net change $ (2,004 ) $ 593 $ (1,411 ) $ 5,418 $ (1,602 ) $ 3,816 Nine Months Ended September 30, 2020 2019 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 $ 33,382 $ (9,869 ) $ 23,513 $ 44,586 $ (13,181 ) $ 31,405 Amortization of net unrealized losses on securities transferred from available-for-sale held-to-maturity (48 ) 14 (34 ) (1,450 ) 429 (1,021 ) Net realized gain reclassified into earnings (1) - - - (5 ) 1 (4 ) Net change $ 33,334 $ (9,855 ) $ 23,479 $ 43,131 $ (12,751 ) $ 30,380 (1) Included in other noninterest income.

Balance Sheet Offsetting

Balance Sheet Offsetting	9 Months Ended
	Sep. 30, 2020
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 Gross Amounts Not Offset in the Net Amount Financial Collateral (Dollars in thousands) September 30, 2020 Financial assets: Derivatives not designated as $ 37,255 $ - $ - $ 37,255 $ - $ 37,255 Total $ 37,255 $ - $ - $ 37,255 $ - $ 37,255 Financial liabilities: Derivatives not designated as $ 37,255 $ - $ 37,255 $ - $ (66,946 ) $ (29,691 ) Repurchase agreements 483,420 - 483,420 - (498,535 ) (15,115 ) Total $ 520,675 $ - $ 520,675 $ - $ (565,481 ) $ (44,806 ) December 31, 2019 Financial assets: Derivatives not designated as $ 11,502 $ - $ - $ 11,502 $ - $ 11,502 Total $ 11,502 $ - $ - $ 11,502 $ - $ 11,502 Financial liabilities: Derivatives not designated as $ 11,619 $ (117 ) $ 11,502 $ 117 $ (23,312 ) $ (11,693 ) Repurchase agreements 428,659 - 428,659 - (510,138 ) (81,479 ) Total $ 440,278 $ (117 ) $ 440,161 $ 117 $ (533,450 ) $ (93,172 )

Leases

Leases	9 Months Ended
	Sep. 30, 2020
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. September 30, December 31, (Dollars in thousands) Lease Assets and Liabilities ROU assets $ 19,771 $ 18,522 Total lease liabilities 21,939 21,392 Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in thousands) Lease Cost Operating lease expense (1) $ 1,654 $ 1,628 $ 4,900 $ 5,634 Sublease income - - - - Total lease expense $ 1,654 $ 1,628 $ 4,900 $ 5,634 (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 $ 1,826 $ 1,640 $ 5,630 $ 6,499 Lease Term and Discount Rate September 30, December 31, Weighted average remaining lease term (years) 4.29 4.18 Weighted average discount rate 2.86 % 3.34 % The Company’s lease arrangements that have not yet commenced as of September 30, 2020 and the Company’s short-term lease costs and variable lease costs, for the nine months ended September 30, 2020 are not material to the consolidated financial statements. The future lease payments required for leases that have initial or remaining non-cancelable September 30, 2020 (Dollars in thousands) Year: 2020 (excluding the nine months ended September 30, 2020) $ 1,781 2021 6,656 2022 5,475 2023 3,615 2024 2,428 Thereafter 3,461 Total future lease payments 23,416 Less: Imputed interest (1,477 ) Present value of lease liabilities $ 21,939

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue Recognition	12. REVENUE RECOGNITION On January 1, 2018, the Company adopted ASU No. 2014-09 Summary of Significant Accounting Policies Revenue Recognition our 10-K in-scope The following presents noninterest income, segregated by revenue streams in-scope out-of-scope Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (Dollars in thousands) Noninterest income: In-scope Service charges on deposit accounts $ 3,970 $ 4,833 $ 12,555 $ 15,039 Trust and investment services 2,405 2,330 7,302 6,964 Bankcard services 456 637 1,438 2,614 Gain on OREO, net 13 - 23 129 Other 3,160 2,292 8,736 6,939 Noninterest Income (in-scope 10,004 10,092 30,054 31,685 Noninterest Income (out-of-scope 3,149 1,802 6,891 14,717 Total noninterest income $ 13,153 $ 11,894 $ 36,945 $ 46,402

Accounting policies (Policies)

Accounting policies (Policies)	9 Months Ended
	Sep. 30, 2020
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
Adoption of New Accounting Standard	Adoption of New Accounting Standard Provision and Allowance for Credit Losses No. 2016-13, held-to-maturity available-for-sale The Company adopted this ASU using the modified retrospective method for all financial assets measured at amortized cost and off-balance The Company developed an allowance model that calculates reserves over the life of the loan and is largely driven by portfolio characteristics, risk grading, macroeconomic variables and the associated economic outlook, as well as other key methodology assumptions. The allowance is based upon historical lifetime loss rate models segregated by three loan segments: Commercial and Industrial, Commercial Real Estate, and Consumer Retail. In addition to determining the quantitative life of loan loss rate to be applied against the portfolio segments, the ASU indicates management has the opportunity to layer on current conditions and forecast adjustments to ensure that the life of loan loss rate reflects both the current state of the portfolio, and expectations for macroeconomic changes in the near future. We utilized a single economic forecast that is based on probability weighted scenarios to incorporate macroeconomic uncertainty over a 2 or 3-year Beginning in the second half of March 2020, the broader economy experienced a significant deterioration in the economic environment driven by the COVID-19 pandemic resulting in adverse changes to the forecasted macroeconomic variables utilized in our modeling processes. This economic deterioration, coupled with the implementation of the expected loss methodology for determining our provision for credit losses, have contributed to an increased provision for credit losses of million in the first half of 2020. We continue to monitor the impact on the economy from COVID-19 closely, as well as any effects that may result from the CARES Act. The extent to which the COVID-19 pandemic will impact our operations and financial results during the final quarter of 2020 is uncertain, but we may experience increased provision for credit losses if the COVID-19 pandemic results in additional economic stress on our borrowers and loan portfolios.

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Estimated Fair Value of Investment Securities	September 30, 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 $ 1,710,160 $ 46,713 $ (2) $ 1,756,871 79.65% CMO/REMIC 404,380 7,326 (212) 411,494 18.66% Municipal bonds 35,011 1,457 - 36,468 1.65% Other securities 813 - - 813 0.04% Total available-for-sale $ 2,150,364 $ 55,496 $ (214) $ 2,205,646 100.00% Investment securities held-to-maturity: Government agency/GSE $ 103,317 $ 6,627 $ - $ 109,944 17.88% Mortgage-backed securities 152,285 7,837 - 160,122 26.36% CMO/REMIC 159,676 5,315 - 164,991 27.64% Municipal bonds 162,416 6,387 (338) 168,465 28.12% Total held-to-maturity $ 577,694 $ 26,166 $ (338) $ 603,522 100.00% December 31, 2019 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 $ 1,185,757 $ 21,306 $ (750) $ 1,206,313 69.32% CMO/REMIC 493,214 1,392 (896) 493,710 28.37% Municipal bonds 38,506 850 (2) 39,354 2.26% Other securities 880 - - 880 0.05% Total available-for-sale $ 1,718,357 $ 23,548 $ (1,648) $ 1,740,257 100.00% Investment securities held-to-maturity: Government agency/GSE $ 117,366 $ 2,280 $ (657) $ 118,989 17.40% Mortgage-backed securities 168,479 2,083 (54) 170,508 24.98% CMO/REMIC 192,548 - (2,458) 190,090 28.55% Municipal bonds 196,059 3,867 (565) 199,361 29.07% Total held-to-maturity $ 674,452 $ 8,230 $ (3,734) $ 678,948 100.00%
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 Nine Months Ended 2020 2019 2020 2019 (Dollars in thousands) Investment securities available-for-sale: Taxable $ 8,244 $ 8,949 $ 26,313 $ 29,079 Tax-advantaged 203 273 632 906 Total interest income from available-for-sale 8,447 9,222 26,945 29,985 Investment securities held-to-maturity: Taxable 2,265 2,883 7,410 8,725 Tax-advantaged 1,110 1,415 3,623 4,524 Total interest income from held-to-maturity 3,375 4,298 11,033 13,249 Total interest income from investment securities $ 11,822 $ 13,520 $ 37,978 $ 43,234
Summary of Continuous Unrealized Loss Position of Securities	The following table presents the Company’s available-for-sale September 30, 2020 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 $ 30,851 $ (2) $ - $ - $ 30,851 $ (2) CMO/REMIC 71,781 (212) - - 71,781 (212) Municipal bonds - - - - - - Total available-for-sale $ 102,632 $ (214) $ - $ - $ 102,632 $ (214) December 31, 2019 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 $ 20,289 $ (6) $ 97,964 $ (744) $ 118,253 $ (750) CMO/REMIC 177,517 (705) 34,565 (191) 212,082 (896) Municipal bonds - - 563 (2) 563 (2) Total available-for-sale $ 197,806 $ (711) $ 133,092 $ (937) $ 330,898 $ (1,648) Investment securities held-to-maturity: Government agency/GSE $ 28,359 $ (252) $ 19,405 $ (405) $ 47,764 $ (657) Mortgage-backed securities 10,411 (54) - - 10,411 (54) CMO/REMIC 23,897 (104) 166,193 (2,354) 190,090 (2,458) Municipal bonds 7,583 (32) 29,981 (533) 37,564 (565) Total held-to-maturity $ 70,250 $ (442) $ 215,579 $ (3,292) $ 285,829 $ (3,734)
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. September 30, 2020 Available-for-sale Held-to-maturity Amortized Fair Value Amortized Fair Value (Dollars in thousands) Due in one year or less $ 27,816 $ 27,968 $ 2,730 $ 2,764 Due after one year through five years 1,960,912 2,012,028 327,785 341,060 Due after five years through ten years 119,315 121,652 81,246 84,329 Due after ten years 42,321 43,998 165,933 175,369 Total investment securities $ 2,150,364 $ 2,205,646 $ 577,694 $ 603,522

Loans and Lease Finance Recei_2

Loans and Lease Finance Receivables and Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2020
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. September 30, 2020 December 31, 2019 (Dollars in thousands) Commercial and industrial $ 817,056 $ 935,127 SBA 304,987 305,008 SBA - Paycheck Protection Program (PPP) 1,101,142 - Real estate: Commercial real estate 5,428,223 5,374,617 Construction 101,903 116,925 SFR mortgage 274,731 283,468 Dairy & livestock and agribusiness 252,802 383,709 Municipal lease finance receivables 38,040 53,146 Consumer and other loans 88,988 116,319 Total loans 8,407,872 7,568,319 Less: Deferred loan fees, net (1) - (3,742 ) Total loans, net of deferred loan fees 8,407,872 7,564,577 Less: Allowance for credit losses (93,869 ) (68,660 ) Total loans and lease finance receivables, net $ 8,314,003 $ 7,495,917 (1) Beginning with March 31, 2020, gross loans are presented net of deferred loan fees by respective class of financing receivables.
Summary of loans by type and origination year, according to our internal risk ratings	The following table summarizes loans by type and origination year, according to our internal risk ratings as of the date presented. Origination Year Revolving Revolving September 30, 2020 2020 2019 2018 2017 2016 Prior Total (Dollars in thousands) Commercial and Risk Rating: Pass $ 81,480 $ 170,738 $ 72,345 $ 62,918 $ 41,860 $ 80,669 $ 255,407 $ 8,153 $ 773,570 Special Mention - 1,235 3,087 814 241 5,015 15,970 1,022 27,384 Substandard 4,545 111 1,500 1,815 448 8 6,472 1,203 16,102 Doubtful & Loss - - - - - - - - - Total Commercial and $ 86,025 $ 172,084 $ 76,932 $ 65,547 $ 42,549 $ 85,692 $ 277,849 $ 10,378 $ 817,056 SBA loans: Risk Rating: Pass $ 37,389 $ 13,394 $ 46,193 $ 72,665 $ 26,687 $ 88,255 $ - $ 2,873 $ 287,456 Special Mention - - - 1,113 1,352 6,910 - - 9,375 Substandard - - 955 1,998 1,546 3,657 - - 8,156 Doubtful & Loss - - - - - - - - - Total SBA loans: $ 37,389 $ 13,394 $ 47,148 $ 75,776 $ 29,585 $ 98,822 $ - $ 2,873 $ 304,987 SBA - PPP loans: Risk Rating: Pass $ 1,101,142 $ - $ - $ - $ - $ - $ - $ - $ 1,101,142 Special Mention - - - - - - - - - Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total SBA - PPP loans: $ 1,101,142 $ - $ - $ - $ - $ - $ - $ - $ 1,101,142 Commercial real estate loans: Risk Rating: Pass $ 617,068 $ 701,648 $ 680,997 $ 684,519 $ 589,553 $ 1,776,989 $ 201,021 $ 26,329 $ 5,278,124 Special Mention 4,619 11,125 18,168 21,767 13,865 48,591 5,447 297 123,879 Substandard - 793 3,815 5,497 1,281 14,597 237 - 26,220 Doubtful & Loss - - - - - - - - - Total Commercial real estate loans: $ 621,687 $ 713,566 $ 702,980 $ 711,783 $ 604,699 $ 1,840,177 $ 206,705 $ 26,626 $ 5,428,223 Construction loans: Risk Rating: Pass $ 11,160 $ 8,614 $ 14,399 $ 15,667 $ 10,592 $ 4 $ 41,467 $ - $ 101,903 Special Mention - - - - - - - - - Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Construction loans: $ 11,160 $ 8,614 $ 14,399 $ 15,667 $ 10,592 $ 4 $ 41,467 $ - $ 101,903 SFR mortgage loans: Risk Rating: Pass $ 52,050 $ 62,087 $ 33,614 $ 25,069 $ 28,344 $ 69,215 $ - $ - $ 270,379 Special Mention 15 - - - - 456 - - 471 Substandard - 238 - - 229 2,974 - 440 3,881 Doubtful & Loss - - - - - - - - - Total SFR mortgage loans: $ 52,065 $ 62,325 $ 33,614 $ 25,069 $ 28,573 $ 72,645 $ - $ 440 $ 274,731 Origination Year Revolving Revolving September 30, 2020 2020 2019 2018 2017 2016 Prior Total (Dollars in thousands) Dairy & livestock and agribusiness loans: Risk Rating: Pass $ 742 $ 2,201 $ 1,675 $ 5,709 $ 152 $ 341 $ 210,610 $ 494 $ 221,924 Special Mention 13 - - - - - 11,596 1,631 13,240 Substandard - - 849 703 2,985 - 824 12,277 17,638 Doubtful & Loss - - - - - - - - - Total Dairy & livestock and agribusiness loans: $ 755 $ 2,201 $ 2,524 $ 6,412 $ 3,137 $ 341 $ 223,030 $ 14,402 $ 252,802 Municipal lease finance receivables loans: Risk Rating: Pass $ 123 $ - $ 2,556 $ 10,436 $ 3,587 $ 20,926 $ - $ - $ 37,628 Special Mention - - - - - 412 - - 412 Substandard - - - - - - - - - Doubtful & Loss - - - - - - - - - Total Municipal lease finance receivables loans: $ 123 $ - $ 2,556 $ 10,436 $ 3,587 $ 21,338 $ - $ - $ 38,040 Consumer and other Risk Rating: Pass $ 5,483 $ 2,334 $ 971 $ 1,068 $ 1,714 $ 1,380 $ 72,501 $ 1,994 $ 87,445 Special Mention - - - - - 91 737 - 828 Substandard - - - - - 174 - 541 715 Doubtful & Loss - - - - - - - - - Total Consumer and other loans: $ 5,483 $ 2,334 $ 971 $ 1,068 $ 1,714 $ 1,645 $ 73,238 $ 2,535 $ 88,988 Gross loans: Risk Rating: Pass $ 1,906,637 $ 961,016 $ 852,750 $ 878,051 $ 702,489 $ 2,037,779 $ 781,006 $ 39,843 $ 8,159,571 Special Mention 4,647 12,360 21,255 23,694 15,458 61,475 33,750 2,950 175,589 Substandard 4,545 1,142 7,119 10,013 6,489 21,410 7,533 14,461 72,712 Doubtful & Loss - - - - - - - - - Total Gross loans: $ 1,915,829 $ 974,518 $ 881,124 $ 911,758 $ 724,436 $ 2,120,664 $ 822,289 $ 57,254 $ 8,407,872
Summary of Loan, Excluding PCI Loans by Internal Risk Ratings	The following table summarizes loans by type, according to our internal risk ratings as of the date presented. December 31, 2019 Pass Special Substandard Doubtful & Total (Dollars in thousands) Commercial and industrial $ 895,234 $ 35,473 $ 4,420 $ - $ 935,127 SBA 283,430 11,032 10,546 - 305,008 Real estate: Commercial real estate Owner occupied 1,977,007 78,208 28,435 - 2,083,650 Non-owner 3,280,580 10,005 382 - 3,290,967 Construction Speculative 106,895 - - - 106,895 Non-speculative 10,030 - - - 10,030 SFR mortgage 280,010 1,957 1,501 - 283,468 Dairy & livestock and agribusiness 320,670 35,920 27,119 - 383,709 Municipal lease finance receivables 52,676 470 - - 53,146 Consumer and other loans 114,870 421 1,028 - 116,319 Total gross loans $ 7,321,402 $ 173,486 $ 73,431 $ - $ 7,568,319
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 September 30, 2020 Ending Balance Charge-offs Recoveries Provision for Ending Balance (Dollars in thousands) Commercial and industrial $ 7,991 $ (161 ) $ 2 $ 761 $ 8,593 SBA 3,651 (47 ) 69 (169 ) 3,504 SBA - PPP - - - - - Real estate: Commercial real estate 74,928 - - (473 ) 74,455 Construction 2,290 - 3 (355 ) 1,938 SFR mortgage 222 - - 15 237 Dairy & livestock and agribusiness 3,379 - - 330 3,709 Municipal lease finance receivables 302 - - (153 ) 149 Consumer and other loans 1,220 (23 ) 43 44 1,284 Total allowance for credit losses $ 93,983 $ (231 ) $ 117 $ - $ 93,869 Three Months Ended September 30, 2019 Ending Balance Charge-offs Recoveries Provision for Ending Balance (Dollars in thousands) Commercial and industrial $ 7,857 $ - $ 94 $ 287 $ 8,238 SBA 1,119 (65 ) - 412 1,466 Real estate: Commercial real estate 48,287 - - 624 48,911 Construction 871 - 3 55 929 SFR mortgage 2,323 - 8 44 2,375 Dairy & livestock and agribusiness 5,341 - - 88 5,429 Municipal lease finance receivables 726 - - (64 ) 662 Consumer and other loans 608 (3 ) 3 54 662 Total allowance for loan losses $ 67,132 $ (68 ) $ 108 $ 1,500 $ 68,672 Nine Months Ended September 30, 2020 Ending Balance, 2016-13 Impact of ASU 2016-13 Charge-offs Recoveries Provision for Ending Balance (Dollars in thousands) Commercial and industrial $ 8,880 $ (2,442 ) $ (172 ) $ 7 $ 2,320 $ 8,593 SBA 1,453 1,818 (203 ) 72 364 3,504 SBA - PPP - - - - - - Real estate: Commercial real estate 48,629 3,547 - - 22,279 74,455 Construction 858 655 - 9 416 1,938 SFR mortgage 2,339 (2,043 ) - 206 (265 ) 237 Dairy & livestock and agribusiness 5,255 (186 ) - - (1,360 ) 3,709 Municipal lease finance receivables 623 (416 ) - - (58 ) 149 Consumer and other loans 623 907 (109 ) 59 (196 ) 1,284 Total allowance for credit losses $ 68,660 $ 1,840 $ (484 ) $ 353 $ 23,500 $ 93,869 Nine Months Ended September 30, 2019 Ending Balance Charge-offs Recoveries Provision for Ending Balance (Dollars in thousands) Commercial and industrial $ 7,528 $ (48 ) $ 253 $ 505 $ 8,238 SBA 1,078 (295 ) 9 674 1,466 Real estate: Commercial real estate 45,097 - - 3,814 48,911 Construction 981 - 9 (61 ) 929 SFR mortgage 2,197 - 191 (13 ) 2,375 Dairy & livestock and agribusiness 5,225 (78 ) 19 263 5,429 Municipal lease finance receivables 775 - - (113 ) 662 Consumer and other loans 732 (7 ) 6 (69 ) 662 Total allowance for loan losses $ 63,613 $ (428 ) $ 487 $ 5,000 $ 68,672
Schedule of Recorded Investment in Loans Held-for-Investment and Related Allowance for Loan Losses by Loan Type	September 30, 2019 Recorded Investment in Loans Allowance for Loan Losses Individually Collectively Individually Collectively (Dollars in thousands) Commercial and industrial $ 1,638 $ 920,040 $ 254 $ 7,984 SBA 3,248 316,323 286 1,180 Real estate: Commercial real estate 1,500 5,374,168 - 48,911 Construction - 119,931 - 929 SFR mortgage 3,009 275,635 - 2,375 Dairy & livestock and agribusiness - 311,229 - 5,429 Municipal lease finance receivables - 54,468 - 662 Consumer and other loans 385 116,743 - 662 Total $ 9,780 $ 7,488,537 $ 540 $ 68,132
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 date presented. September 30, 2020 30-59 Days 60-89 Days Greater than Past Due Total Past Due Loans Not Total Loans (Dollars in thousands) Commercial and industrial $ 3,582 $ 1,209 $ 560 $ 5,351 $ 811,705 $ 817,056 SBA 468 270 777 1,515 303,472 304,987 SBA - PPP - - - - 1,101,142 1,101,142 Real estate: Commercial real estate Owner occupied - - 3,770 3,770 2,121,430 2,125,200 Non-owner - - 1,715 1,715 3,301,308 3,303,023 Construction Speculative (1) - - - - 94,232 94,232 Non-speculative - - - - 7,671 7,671 SFR mortgage - - 467 467 274,264 274,731 Dairy & livestock and agribusiness - 849 - 849 251,953 252,802 Municipal lease finance receivables - - - - 38,040 38,040 Consumer and other loans 68 - 34 102 88,886 88,988 Total gross loans $ 4,118 $ 2,328 $ 7,323 $ 13,769 $ 8,394,103 $ 8,407,872 (1) Speculative construction loans are generally for properties where there is no identified buyer or renter. Following the adoption of CECL on January 1, 2020, the definitions of impairment and related impaired loan disclosures were removed. Under CECL, amortized cost of our finance receivables and loans that are on nonaccrual status, including loans with no allowance, are presented as of September 30, 2020 by type of loan. September 30, 2020 Nonaccrual Total Loans Past 89 Days Still (Dollars in thousands) Commercial and industrial $ 1,421 $ 1,822 $ - SBA 850 1,724 - SBA - PPP - - - Real estate: Commercial real estate Owner occupied 4,766 4,766 - Non-owner - 1,715 - Construction Speculative (2) - - - Non-speculative - - - SFR mortgage 675 675 - Dairy & livestock and agribusiness 849 849 - Municipal lease finance receivables - - - Consumer and other loans 224 224 - Total gross loans $ 8,785 $ 11,775 $ - (1) As of September 30, 2020, $1.8 million of nonaccruing loans were current, $571,000 were 30-59 60-89 (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. (3) Excludes $51,000 of guaranteed portion of nonaccrual SBA loans that are in process of collection. The following table presents the recorded investment in, and the aging of, past due and nonaccrual loans, by type of loans as of the date presented. December 31, 2019 30-59 Days 60-89 Days Total Past Due Nonaccrual (1) (3) Current Total Loans (Dollars in thousands) Commercial and industrial $ 2 $ - $ 2 $ 1,266 $ 933,859 $ 935,127 SBA 870 532 1,402 2,032 301,574 305,008 Real estate: Commercial real estate Owner occupied - - - 479 2,083,171 2,083,650 Non-owner - - - 245 3,290,722 3,290,967 Construction Speculative (2) - - - - 106,895 106,895 Non-speculative - - - - 10,030 10,030 SFR mortgage 6 243 249 878 282,341 283,468 Dairy & livestock and agribusiness - - - - 383,709 383,709 Municipal lease finance receivables - - - - 53,146 53,146 Consumer and other loans - - - 377 115,942 116,319 Total gross loans $ 878 $ 775 $ 1,653 $ 5,277 $ 7,561,389 $ 7,568,319 (1) As of December 31, 2019, $1.2 million of nonaccruing loans were current, $59,000 were 30-59 60-89 (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. (3) Excludes $2.0 million of guaranteed portion of nonaccrual SBA loans that are in process of collection.
Schedule of Held-for-Investment Loans, Individually Evaluated for Impairment by Class of Loans	As of and For the Nine Months Ended Recorded Unpaid Related Average Interest (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 1,382 $ 1,537 $ - $ 1,560 $ 4 SBA 2,447 3,554 - 2,606 31 Real estate: Commercial real estate Owner occupied 494 614 - 508 - Non-owner occupied 1,006 1,190 - 1,052 21 Construction Speculative - - - - - Non-speculative - - - - - SFR mortgage 3,009 3,338 - 3,059 62 Dairy & livestock and agribusiness - - - - - Municipal lease finance receivables - - - - - Consumer and other loans 385 516 - 401 - Total 8,723 10,749 - 9,186 118 With a related allowance recorded: Commercial and industrial 256 345 254 829 - SBA 801 816 286 816 - Real estate: Commercial real estate Owner occupied - - - - - Non-owner occupied - - - - - Construction Speculative - - - - - Non-speculative - - - - - SFR mortgage - - - - - Dairy & livestock and agribusiness - - - - - Municipal lease finance receivables - - - - - Consumer and other loans - - - - - Total 1,057 1,161 540 1,645 - Total impaired loans $ 9,780 $ 11,910 $ 540 $ 10,831 $ 118 December 31, 2019 Recorded Unpaid Related (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 1,091 $ 1,261 $ - SBA 2,243 2,734 - Real estate: Commercial real estate Owner occupied 479 613 - Non-owner 642 643 - Construction Speculative - - - Non-speculative - - - SFR mortgage 2,979 3,310 - Dairy & livestock and agribusiness - - - Municipal lease finance receivables - - - Consumer and other loans 377 514 - Total 7,811 9,075 - With a related allowance recorded: Commercial and industrial 253 347 251 SBA 325 324 257 Real estate: Commercial real estate Owner occupied - - - Non-owner - - - Construction Speculative - - - Non-speculative - - - SFR mortgage - - - Dairy & livestock and agribusiness - - - Municipal lease finance receivables - - - Consumer and other loans - - - Total 578 671 508 Total impaired loans $ 8,389 $ 9,746 $ 508
Summary of pledged assets not separately reported on statement of financial position	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 date presented. September 30, 2020 Number of Real Estate Business Assets Other (Dollars in thousands) Commercial and industrial $ 145 $ 4,703 $ 62 14 SBA 1,015 497 7 11 SBA - PPP - - - - Real estate: Commercial real estate 6,836 - - 7 Construction - - - - SFR mortgage 675 - - 3 Dairy & livestock and agribusiness - 849 - 1 Municipal lease finance receivables - - - - Consumer and other loans 203 - 20 4 Total collateral-dependent loans $ 8,874 $ 6,049 $ 89 40
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 Nine Months Ended 2020 2019 2020 2019 (Dollars in thousands) Performing TDRs: Beginning balance $ 2,771 $ 3,219 $ 3,112 $ 3,594 New modifications - - - - Payoffs/payments, net and other (554 ) (51 ) (895 ) (426 ) TDRs returned to accrual status - - - - TDRs placed on nonaccrual status - - - - Ending balance $ 2,217 $ 3,168 $ 2,217 $ 3,168 Nonperforming TDRs: Beginning balance $ - $ 263 $ 244 $ 3,509 New modifications - - - - Charge-offs - - - (78 ) Transfer to OREO - - - (2,275 ) Payoffs/payments, net and other - (14 ) (244 ) (907 ) TDRs returned to accrual status - - - - TDRs placed on nonaccrual status - - - - Ending balance $ - $ 249 $ - $ 249 Total TDRs $ 2,217 $ 3,417 $ 2,217 $ 3,417

Earnings Per Share Reconcilia_2

Earnings Per Share Reconciliation (Tables)	9 Months Ended
	Sep. 30, 2020
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 Nine Months Ended 2020 2019 2020 2019 (In thousands, except per share amounts) Earnings per common share: Net earnings $ 47,492 $ 50,423 $ 127,103 $ 156,546 Less: Net earnings allocated to restricted stock 175 116 407 390 Net earnings allocated to common shareholders $ 47,317 $ 50,307 $ 126,696 $ 156,156 Weighted average shares outstanding 135,017 139,824 136,369 139,730 Basic earnings per common share $ 0.35 $ 0.36 $ 0.93 $ 1.12 Diluted earnings per common share: Net income allocated to common shareholders $ 47,317 $ 50,307 $ 126,696 $ 156,156 Weighted average shares outstanding 135,017 139,824 136,369 139,730 Incremental shares from assumed exercise of outstanding options 167 151 167 217 Diluted weighted average shares outstanding 135,184 139,975 136,536 139,947 Diluted earnings per common share $ 0.35 $ 0.36 $ 0.93 $ 1.12

Fair Value Information (Tables)

Fair Value Information (Tables)	9 Months Ended
	Sep. 30, 2020
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 Active Markets for Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Mortgage-backed securities $ 1,756,871 $ - $ 1,756,871 $ - CMO/REMIC 411,494 - 411,494 - Municipal bonds 36,468 - 36,468 - Other securities 813 - 813 - Total investment securities - AFS 2,205,646 - 2,205,646 - Interest rate swaps 37,255 - 37,255 - Total assets $ 2,242,901 $ - $ 2,242,901 $ - Description of liability Interest rate swaps $ 37,255 $ - $ 37,255 $ - Total liabilities $ 37,255 $ - $ 37,255 $ - Carrying Value at Quoted Prices in Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Mortgage-backed securities $ 1,206,313 $ - $ 1,206,313 $ - CMO/REMIC 493,710 - 493,710 - Municipal bonds 39,354 - 39,354 - Other securities 880 - 880 - Total investment securities - AFS 1,740,257 - 1,740,257 - Interest rate swaps 11,502 - 11,502 - Total assets $ 1,751,759 $ - $ 1,751,759 $ - Description of liability Interest rate swaps $ 11,502 $ - $ 11,502 $ - Total liabilities $ 11,502 $ - $ 11,502 $ -
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 For the Nine Months Ended (Dollars in thousands) Description of assets Loans: Commercial and industrial $ 3,273 $ - $ - $ 3,273 $ 2,034 SBA 712 - - 712 203 Real estate: Commercial real estate 1,715 - - 1,715 1,295 Construction - - - - - SFR mortgage - - - - - Dairy & livestock and agribusiness - - - - - Consumer and other loans - - - - - Other real estate owned 2,275 - - 2,275 700 Asset held-for-sale - - - - - Total assets $ 7,975 $ - $ - $ 7,975 $ 4,232 Carrying Value at Quoted Prices in Significant Other Significant Total Losses (Dollars in thousands) Description of assets Impaired loans: Commercial and industrial $ 253 $ - $ - $ 253 $ 251 SBA 359 - - 359 513 Real estate: Commercial real estate - - - - - Construction - - - - - SFR mortgage - - - - - Dairy & livestock and agribusiness - - - - - Consumer and other loans - - - - - Other real estate owned 444 - - 444 64 Asset held-for-sale - - - - - Total assets $ 1,056 $ - $ - $ 1,056 $ 828
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 September 30, 2020 and December 31, 2019, respectively. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. September 30, 2020 Carrying Estimated Fair Value Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 1,484,953 $ 1,484,953 $ - $ - $ 1,484,953 Interest-earning balances due from depository 44,367 - 44,414 - 44,414 Investment securities available-for-sale 2,205,646 - 2,205,646 - 2,205,646 Investment securities held-to-maturity 577,694 - 603,522 - 603,522 Total loans, net of allowance for credit losses 8,314,003 - - 8,326,796 8,326,796 Swaps 37,255 - 37,255 - 37,255 Liabilities Deposits: Interest-bearing $ 4,249,411 $ - $ 4,250,728 $ - $ 4,250,728 Borrowings 493,420 - 493,344 - 493,344 Junior subordinated debentures 25,774 - - 18,917 18,917 Swaps 37,255 - 37,255 - 37,255 December 31, 2019 Carrying Estimated Fair Value Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 185,518 $ 185,518 $ - $ - $ 185,518 Interest-earning balances due from depository 2,931 - 2,938 - 2,938 Investment securities available-for-sale 1,740,257 - 1,740,257 - 1,740,257 Investment securities held-to-maturity 674,452 - 678,948 - 678,948 Total loans, net of allowance for loan losses 7,495,917 - - 7,343,167 7,343,167 Swaps 11,502 - 11,502 - 11,502 Liabilities Deposits: Interest-bearing $ 3,459,411 $ - $ 3,457,922 $ - $ 3,457,922 Borrowings 428,659 - 428,330 - 428,330 Junior subordinated debentures 25,774 - - 20,669 20,669 Swaps 11,502 - 11,502 - 11,502

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Instruments	As of September 30, 2020 and December 31, 2019, the total notional amount of the Company’s swaps was $455.2 million, and $260.0 million, respectively. The location of the asset and liability, and their respective fair values, are summarized in the tables below. September 30, 2020 Asset Derivatives Liability Derivatives Balance Sheet Fair Balance Sheet Fair (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 37,255 Other liabilities $ 37,255 Total derivatives $ 37,255 $ 37,255 December 31, 2019 Asset Derivatives Liability Derivatives Balance Sheet Fair Balance Sheet Fair (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 11,502 Other liabilities $ 11,502 Total derivatives $ 11,502 $ 11,502
Effect of Derivative Instruments on Consolidated Statement of Earnings	The following table summarizes the effect of derivative financial instruments on the condensed consolidated statement of earnings for the periods presented. Derivatives Not Designated as Hedging Instruments Location of Gain Recognized in Amount of Gain Recognized in Income Three Months Ended Nine Months Ended 2020 2019 2020 2019 (Dollars in thousands) Interest rate swaps Other income $ 1,591 $ 378 $ 4,149 $ 1,135 Total $ 1,591 $ 378 $ 4,149 $ 1,135

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 2019 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 $ (1,974 ) $ 584 $ (1,390 ) $ 5,672 $ (1,677 ) $ 3,995 Amortization of net unrealized losses on securities transferred from available-for-sale held-to-maturity (30 ) 9 (21 ) (249 ) 74 (175 ) Net realized gain reclassified into earnings (1) - - - (5 ) 1 (4 ) Net change $ (2,004 ) $ 593 $ (1,411 ) $ 5,418 $ (1,602 ) $ 3,816 Nine Months Ended September 30, 2020 2019 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 $ 33,382 $ (9,869 ) $ 23,513 $ 44,586 $ (13,181 ) $ 31,405 Amortization of net unrealized losses on securities transferred from available-for-sale held-to-maturity (48 ) 14 (34 ) (1,450 ) 429 (1,021 ) Net realized gain reclassified into earnings (1) - - - (5 ) 1 (4 ) Net change $ 33,334 $ (9,855 ) $ 23,479 $ 43,131 $ (12,751 ) $ 30,380 (1) Included in other noninterest income.

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	9 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Schedule of Balance Sheet Offsetting	Gross Amounts Gross Amounts Net Amounts Gross Amounts Not Offset in the Net Amount Financial Collateral (Dollars in thousands) September 30, 2020 Financial assets: Derivatives not designated as $ 37,255 $ - $ - $ 37,255 $ - $ 37,255 Total $ 37,255 $ - $ - $ 37,255 $ - $ 37,255 Financial liabilities: Derivatives not designated as $ 37,255 $ - $ 37,255 $ - $ (66,946 ) $ (29,691 ) Repurchase agreements 483,420 - 483,420 - (498,535 ) (15,115 ) Total $ 520,675 $ - $ 520,675 $ - $ (565,481 ) $ (44,806 ) December 31, 2019 Financial assets: Derivatives not designated as $ 11,502 $ - $ - $ 11,502 $ - $ 11,502 Total $ 11,502 $ - $ - $ 11,502 $ - $ 11,502 Financial liabilities: Derivatives not designated as $ 11,619 $ (117 ) $ 11,502 $ 117 $ (23,312 ) $ (11,693 ) Repurchase agreements 428,659 - 428,659 - (510,138 ) (81,479 ) Total $ 440,278 $ (117 ) $ 440,161 $ 117 $ (533,450 ) $ (93,172 )

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2020
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. September 30, December 31, (Dollars in thousands) Lease Assets and Liabilities ROU assets $ 19,771 $ 18,522 Total lease liabilities 21,939 21,392 Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in thousands) Lease Cost Operating lease expense (1) $ 1,654 $ 1,628 $ 4,900 $ 5,634 Sublease income - - - - Total lease expense $ 1,654 $ 1,628 $ 4,900 $ 5,634 (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 $ 1,826 $ 1,640 $ 5,630 $ 6,499 Lease Term and Discount Rate September 30, December 31, Weighted average remaining lease term (years) 4.29 4.18 Weighted average discount rate 2.86 % 3.34 %
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 September 30, 2020 (Dollars in thousands) Year: 2020 (excluding the nine months ended September 30, 2020) $ 1,781 2021 6,656 2022 5,475 2023 3,615 2024 2,428 Thereafter 3,461 Total future lease payments 23,416 Less: Imputed interest (1,477 ) Present value of lease liabilities $ 21,939

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2020
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 Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (Dollars in thousands) Noninterest income: In-scope Service charges on deposit accounts $ 3,970 $ 4,833 $ 12,555 $ 15,039 Trust and investment services 2,405 2,330 7,302 6,964 Bankcard services 456 637 1,438 2,614 Gain on OREO, net 13 - 23 129 Other 3,160 2,292 8,736 6,939 Noninterest Income (in-scope 10,004 10,092 30,054 31,685 Noninterest Income (out-of-scope 3,149 1,802 6,891 14,717 Total noninterest income $ 13,153 $ 11,894 $ 36,945 $ 46,402

Business - Additional Informati

Business - Additional Information (Detail)	Sep. 30, 2020LocationLoanSubsidiary
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

Summary of Significant Accoun_2

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	Jan. 01, 2020	Jun. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Net decrease in retained earnings			$ 735,218,000	$ 682,692,000
Transition adjustment, allowance for credit loses for loans	$ 1,800,000		1,800,000
Adjustment of transition reserve for loans			$ 41,000
Increase in provision for credit loses		$ 23,500,000
Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
Summary Of Significant Accounting Policies [Line Items]
Net decrease in retained earnings	$ 1,300,000

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Estimated Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 2,150,364	$ 1,718,357
Gross Unrealized Holding Gain, Available-for-sale	55,496	23,548
Gross Unrealized Holding Loss, Available-for-sale	(214)	(1,648)
Fair Value, Available-for-sale	$ 2,205,646	$ 1,740,257
Total Percent, Available-for-sale	100.00%	100.00%
Amortized Cost, Held-to-maturity	$ 577,694	$ 674,452
Gross Unrealized Holding Gain, Held-to-maturity	26,166	8,230
Gross Unrealized Holding Loss, Held-to-maturity	(338)	(3,734)
Fair Value, Held-to-maturity	$ 603,522	$ 678,948
Total Percent, Held-to-maturity	100.00%	100.00%
CMO/REMIC [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 404,380	$ 493,214
Gross Unrealized Holding Gain, Available-for-sale	7,326	1,392
Gross Unrealized Holding Loss, Available-for-sale	(212)	(896)
Fair Value, Available-for-sale	$ 411,494	$ 493,710
Total Percent, Available-for-sale	18.66%	28.37%
Amortized Cost, Held-to-maturity	$ 159,676	$ 192,548
Gross Unrealized Holding Gain, Held-to-maturity	5,315
Gross Unrealized Holding Loss, Held-to-maturity		(2,458)
Fair Value, Held-to-maturity	$ 164,991	$ 190,090
Total Percent, Held-to-maturity	27.64%	28.55%
Government Agency/GSE [Member]
Schedule of Investments [Line Items]
Amortized Cost, Held-to-maturity	$ 103,317	$ 117,366
Gross Unrealized Holding Gain, Held-to-maturity	6,627	2,280
Gross Unrealized Holding Loss, Held-to-maturity		(657)
Fair Value, Held-to-maturity	$ 109,944	$ 118,989
Total Percent, Held-to-maturity	17.88%	17.40%
Mortgage-backed Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 1,710,160	$ 1,185,757
Gross Unrealized Holding Gain, Available-for-sale	46,713	21,306
Gross Unrealized Holding Loss, Available-for-sale	(2)	(750)
Fair Value, Available-for-sale	$ 1,756,871	$ 1,206,313
Total Percent, Available-for-sale	79.65%	69.32%
Amortized Cost, Held-to-maturity	$ 152,285	$ 168,479
Gross Unrealized Holding Gain, Held-to-maturity	7,837	2,083
Gross Unrealized Holding Loss, Held-to-maturity		(54)
Fair Value, Held-to-maturity	$ 160,122	$ 170,508
Total Percent, Held-to-maturity	26.36%	24.98%
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 35,011	$ 38,506
Gross Unrealized Holding Gain, Available-for-sale	1,457	850
Gross Unrealized Holding Loss, Available-for-sale		(2)
Fair Value, Available-for-sale	$ 36,468	$ 39,354
Total Percent, Available-for-sale	1.65%	2.26%
Amortized Cost, Held-to-maturity	$ 162,416	$ 196,059
Gross Unrealized Holding Gain, Held-to-maturity	6,387	3,867
Gross Unrealized Holding Loss, Held-to-maturity	(338)	(565)
Fair Value, Held-to-maturity	$ 168,465	$ 199,361
Total Percent, Held-to-maturity	28.12%	29.07%
Other Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 813	$ 880
Gross Unrealized Holding Gain, Available-for-sale
Gross Unrealized Holding Loss, Available-for-sale
Fair Value, Available-for-sale	$ 813	$ 880
Total Percent, Available-for-sale	0.04%	0.05%

Investment Securities - Summa_2

Investment Securities - Summary of Interest Income Earned on Investment Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Investment Income [Line Items]
Total interest income from available-for-sale securities	$ 8,447	$ 9,222	$ 26,945	$ 29,985
Total interest income from held-to-maturity securities	3,375	4,298	11,033	13,249
Total investment income	11,822	13,520	37,978	43,234
Investment securities available-for-sale [Member]
Net Investment Income [Line Items]
Taxable	8,244	8,949	26,313	29,079
Tax-advantaged	203	273	632	906
Total interest income from available-for-sale securities	8,447	9,222	26,945	29,985
Investment securities held-to-maturity [Member]
Net Investment Income [Line Items]
Taxable	2,265	2,883	7,410	8,725
Tax-advantaged	1,110	1,415	3,623	4,524
Total interest income from held-to-maturity securities	$ 3,375	$ 4,298	$ 11,033	$ 13,249

Investment Securities - Summa_3

Investment Securities - Summary of Continuous Unrealized Loss Position of Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	$ 102,632	$ 197,806
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	(214)	(711)
Fair Value, 12 Months or Longer, Available-for-sale		133,092
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale		(937)
Fair Value, Available-for-sale	102,632	330,898
Gross Unrealized Holding Losses, Available-for-sale	(214)	(1,648)
Fair Value, Less Than 12 Months, Held-to-maturity		70,250
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity		(442)
Fair Value, 12 Months or Longer, Held-to-maturity		215,579
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity		(3,292)
Fair Value, Held-to-maturity		285,829
Gross Unrealized Holding Losses, Held-to-maturity		(3,734)
CMO/REMIC [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	71,781	177,517
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	(212)	(705)
Fair Value, 12 Months or Longer, Available-for-sale		34,565
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale		(191)
Fair Value, Available-for-sale	71,781	212,082
Gross Unrealized Holding Losses, Available-for-sale	(212)	(896)
Fair Value, Less Than 12 Months, Held-to-maturity		23,897
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity		(104)
Fair Value, 12 Months or Longer, Held-to-maturity		166,193
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity		(2,354)
Fair Value, Held-to-maturity		190,090
Gross Unrealized Holding Losses, Held-to-maturity		(2,458)
Government Agency/GSE [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Held-to-maturity		28,359
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity		(252)
Fair Value, 12 Months or Longer, Held-to-maturity		19,405
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity		(405)
Fair Value, Held-to-maturity		47,764
Gross Unrealized Holding Losses, Held-to-maturity		(657)
Mortgage-backed Securities [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	30,851	20,289
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	(2)	(6)
Fair Value, 12 Months or Longer, Available-for-sale		97,964
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale		(744)
Fair Value, Available-for-sale	30,851	118,253
Gross Unrealized Holding Losses, Available-for-sale	(2)	(750)
Fair Value, Less Than 12 Months, Held-to-maturity		10,411
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity		(54)
Fair Value, 12 Months or Longer, Held-to-maturity
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity
Fair Value, Held-to-maturity		10,411
Gross Unrealized Holding Losses, Held-to-maturity		(54)
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		563
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale		(2)
Fair Value, Available-for-sale		563
Gross Unrealized Holding Losses, Available-for-sale		(2)
Fair Value, Less Than 12 Months, Held-to-maturity		7,583
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity		(32)
Fair Value, 12 Months or Longer, Held-to-maturity		29,981
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity		(533)
Fair Value, Held-to-maturity		37,564
Gross Unrealized Holding Losses, Held-to-maturity		$ (565)

Investment Securities - Summa_4

Investment Securities - Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Due in one year or less, Amortized Cost, Held-to-maturity	$ 2,730
Due after one year through five years, Amortized Cost, Held-to-maturity	327,785
Due after five years through ten years, Amortized Cost, Held-to-maturity	81,246
Due after ten years, Amortized Cost, Held-to-maturity	165,933
Total Held-to-maturity, Debt Maturities, Amortized Cost Basis	577,694
Due in one year or less, Fair Value, Held-to-maturity	2,764
Due after one year through five years, Fair Value, Held-to-maturity	341,060
Due after five years through ten years, Fair Value, Held-to-maturity	84,329
Due after ten years, Fair Value, Held-to-maturity	175,369
Total, Held-to-maturity, Fair Value	603,522
Due in one year or less, Amortized Cost, Available-for-sale	27,816
Due after one year through five years, Amortized Cost, Available-for-sale	1,960,912
Due after five years through ten years, Amortized Cost, Available-for-sale	119,315
Due after ten years, Amortized Cost, Available-for-sale	42,321
Amortized Cost, Available-for-sale	2,150,364	$ 1,718,357
Due in one year or less, Fair Value, Available-for-sale	27,968
Due after one year through five years, Fair Value, Available-for-sale	2,012,028
Due after five years through ten years, Fair Value, Available-for-sale	121,652
Due after ten years, Fair Value, Available-for-sale	43,998
Total Available-for-sale Securities, Debt Maturities, Available-for-sale, Fair Value	$ 2,205,646	$ 1,740,257

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Investment securities pledged as collateral	$ 1,860,000,000	$ 1,640,000,000
Investment in FHLB stock, impairment losses	$ 0
Debt securities weighted average remaining contractual maturity term	17 years
United States [Member]
Debt Securities, Available-for-sale [Line Items]
Securities issued by U.S. government percentage	93.00%

Loans and Lease Finance Recei_3

Loans and Lease Finance Receivables and Allowance for Credit Losses - Additional Information (Detail)	Jan. 01, 2020USD ($)	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Sep. 30, 2020USD ($)Contract	Sep. 30, 2019USD ($)Contract	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2019USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)				1.12%		1.12%
Secure borrowings and available lines of credit from FHLB and Federal Reserve Bank				$ 6,000,000,000		$ 6,000,000,000				$ 6,030,000,000
Loans held-for-sale				0		0				0
Impaired, at carrying value				2,200,000		2,200,000	$ 9,780,000			8,389,000
Allowance for Credit Losses				93,900,000		93,900,000
Reserve for credit risk for undisbursed commitments				9,000,000		9,000,000				9,000,000
Allocation of allowance to troubled debt restructuring				0		$ 0				0
Number of loans modified as a TDR within the previous 12 months that subsequently defaulted | Contract						0	0
Increase in reserve for unfunded loan commitments						$ 0
Allowance For Credit Losses Increase Decrease				114,000		25,200,000
Provision For Credit Losses				0	$ 23,500,000
Allowance For Credit Losses Write Offs				$ 114,000
Transition adjustment, allowance for credit loses for loans	$ 1,800,000					$ 1,800,000
Baseline Forecast [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of weighted forecast				50.00%		50.00%
GDP [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Increase Decrease In Macro Economic Factors				27.00%
GDP [Member] | Forecast [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Increase Decrease In Macro Economic Factors		3.50%	2.90%					5.00%
Unemployment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Increase Decrease In Macro Economic Factors						11.00%
Unemployment [Member] | Forecast [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Increase Decrease In Macro Economic Factors		8.90%						6.40%	8.00%
Impact of ASU 2016-13 Adoption [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in reserve for unfunded loan commitments						$ 41,000
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)				69.04%		69.04%
Notes receivable gross				$ 5,428,223,000		$ 5,428,223,000				5,374,617,000
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)				64.56%		64.56%
Performing Financing Receivable [Member] | Single-family Residential Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured				$ 1,800,000		$ 1,800,000
Performing Financing Receivable [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured				47,000		47,000
Performing Financing Receivable [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured				354,000		354,000
Loans, Excluding PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross				252,800,000		252,800,000
Loans, Excluding PCI Loans [Member] | Dairy & Livestock Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross				210,400,000		210,400,000				323,500,000
Loans, Excluding PCI Loans [Member] | Agribusiness Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross				$ 42,400,000		$ 42,400,000				$ 60,200,000
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)				5.00%		5.00%				4.50%
Notes receivable gross				$ 271,200,000		$ 271,200,000				$ 241,800,000
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				121,100,000		121,100,000				125,900,000
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				$ 150,200,000		$ 150,200,000				$ 115,900,000

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	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Construction	$ 101,903		$ 116,925
Total loans	8,407,872		7,568,319
Less: Deferred loan fees, net			(3,742)
Total loans, net of deferred loan fees	8,407,872		7,564,577
Less: Allowance for credit losses	(93,869)	$ (93,983)	(68,660)	$ (68,672)	$ (67,132)	$ (63,613)
Net loans and lease finance receivables	8,314,003		7,495,917
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	817,056		935,127
Total loans	817,056
SBA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	304,987		305,008
Total loans	304,987
SBA - Paycheck Protection Program (PPP) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	1,101,142
Total loans	1,101,142
Less: Allowance for credit losses	0	0	0
Commercial real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	5,428,223		5,374,617
Total loans	5,428,223
SFR mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	274,731		283,468
Total loans	274,731
Dairy & livestock and agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	252,802		383,709
Total loans	252,802
Municipal Lease Finance Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	38,040		53,146
Total loans	38,040		53,146
Less: Allowance for credit losses	(149)	$ (302)		$ (662)	$ (726)	$ (775)
Consumer and other loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	88,988		$ 116,319
Total loans	$ 88,988

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	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
2020	$ 1,915,829
2019	974,518
2018	881,124
2017	911,758
2016	724,436
Prior	2,120,664
Revolving loans amortized cost basis	822,289
Revolving loans converted to term loans	57,254
Total	8,407,872	$ 7,568,319
Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	86,025
2019	172,084
2018	76,932
2017	65,547
2016	42,549
Prior	85,692
Revolving loans amortized cost basis	277,849
Revolving loans converted to term loans	10,378
Total	817,056
Commercial Trade Financing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	37,389
2019	13,394
2018	47,148
2017	75,776
2016	29,585
Prior	98,822
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	2,873
Total	304,987
SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,101,142
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	1,101,142
Real Estate Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	621,687
2019	713,566
2018	702,980
2017	711,783
2016	604,699
Prior	1,840,177
Revolving loans amortized cost basis	206,705
Revolving loans converted to term loans	26,626
Total	5,428,223
Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	11,160
2019	8,614
2018	14,399
2017	15,667
2016	10,592
Prior	4
Revolving loans amortized cost basis	41,467
Revolving loans converted to term loans	0
Total	101,903
Consumer Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	52,065
2019	62,325
2018	33,614
2017	25,069
2016	28,573
Prior	72,645
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	440
Total	274,731
Dairy And Livestock And Agribusiness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	755
2019	2,201
2018	2,524
2017	6,412
2016	3,137
Prior	341
Revolving loans amortized cost basis	223,030
Revolving loans converted to term loans	14,402
Total	252,802
Municipal Lease Finance Receivables [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	123
2019	0
2018	2,556
2017	10,436
2016	3,587
Prior	21,338
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	38,040	53,146
Consumer Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5,483
2019	2,334
2018	971
2017	1,068
2016	1,714
Prior	1,645
Revolving loans amortized cost basis	73,238
Revolving loans converted to term loans	2,535
Total	88,988
Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,906,637
2019	961,016
2018	852,750
2017	878,051
2016	702,489
Prior	2,037,779
Revolving loans amortized cost basis	781,006
Revolving loans converted to term loans	39,843
Total	8,159,571	7,321,402
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	81,480
2019	170,738
2018	72,345
2017	62,918
2016	41,860
Prior	80,669
Revolving loans amortized cost basis	255,407
Revolving loans converted to term loans	8,153
Total	773,570
Pass [Member] | Commercial Trade Financing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	37,389
2019	13,394
2018	46,193
2017	72,665
2016	26,687
Prior	88,255
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	2,873
Total	287,456
Pass [Member] | SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,101,142
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	1,101,142
Pass [Member] | Real Estate Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	617,068
2019	701,648
2018	680,997
2017	684,519
2016	589,553
Prior	1,776,989
Revolving loans amortized cost basis	201,021
Revolving loans converted to term loans	26,329
Total	5,278,124
Pass [Member] | Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	11,160
2019	8,614
2018	14,399
2017	15,667
2016	10,592
Prior	4
Revolving loans amortized cost basis	41,467
Revolving loans converted to term loans	0
Total	101,903
Pass [Member] | Consumer Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	52,050
2019	62,087
2018	33,614
2017	25,069
2016	28,344
Prior	69,215
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	270,379
Pass [Member] | Dairy And Livestock And Agribusiness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	742
2019	2,201
2018	1,675
2017	5,709
2016	152
Prior	341
Revolving loans amortized cost basis	210,610
Revolving loans converted to term loans	494
Total	221,924
Pass [Member] | Municipal Lease Finance Receivables [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	123
2019	0
2018	2,556
2017	10,436
2016	3,587
Prior	20,926
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	37,628
Pass [Member] | Consumer Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5,483
2019	2,334
2018	971
2017	1,068
2016	1,714
Prior	1,380
Revolving loans amortized cost basis	72,501
Revolving loans converted to term loans	1,994
Total	87,445
Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	4,647
2019	12,360
2018	21,255
2017	23,694
2016	15,458
Prior	61,475
Revolving loans amortized cost basis	33,750
Revolving loans converted to term loans	2,950
Total	175,589	173,486
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	1,235
2018	3,087
2017	814
2016	241
Prior	5,015
Revolving loans amortized cost basis	15,970
Revolving loans converted to term loans	1,022
Total	27,384
Special Mention [Member] | Commercial Trade Financing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	1,113
2016	1,352
Prior	6,910
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	9,375
Special Mention [Member] | SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Special Mention [Member] | Real Estate Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	4,619
2019	11,125
2018	18,168
2017	21,767
2016	13,865
Prior	48,591
Revolving loans amortized cost basis	5,447
Revolving loans converted to term loans	297
Total	123,879
Special Mention [Member] | Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Special Mention [Member] | Consumer Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	15
2019	0
2018	0
2017	0
2016	0
Prior	456
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	471
Special Mention [Member] | Dairy And Livestock And Agribusiness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	13
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	11,596
Revolving loans converted to term loans	1,631
Total	13,240
Special Mention [Member] | Municipal Lease Finance Receivables [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	412
Total	412
Special Mention [Member] | Consumer Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	91
Revolving loans amortized cost basis	737
Revolving loans converted to term loans	0
Total	828
Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	4,545
2019	1,142
2018	7,119
2017	10,013
2016	6,489
Prior	21,410
Revolving loans amortized cost basis	7,533
Revolving loans converted to term loans	14,461
Total	72,712	73,431
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	4,545
2019	111
2018	1,500
2017	1,815
2016	448
Prior	8
Revolving loans amortized cost basis	6,472
Revolving loans converted to term loans	1,203
Total	16,102
Substandard [Member] | Commercial Trade Financing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	955
2017	1,998
2016	1,546
Prior	3,657
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	8,156
Substandard [Member] | SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Substandard [Member] | Real Estate Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	793
2018	3,815
2017	5,497
2016	1,281
Prior	14,597
Revolving loans amortized cost basis	237
Revolving loans converted to term loans	0
Total	26,220
Substandard [Member] | Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Substandard [Member] | Consumer Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	238
2018	0
2017	0
2016	229
Prior	2,974
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	440
Total	3,881
Substandard [Member] | Dairy And Livestock And Agribusiness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	849
2017	703
2016	2,985
Prior	0
Revolving loans amortized cost basis	824
Revolving loans converted to term loans	12,277
Total	17,638
Substandard [Member] | Municipal Lease Finance Receivables [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Substandard [Member] | Consumer Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	174
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	541
Total	715
Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0	$ 0
Doubtful [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Doubtful [Member] | Commercial Trade Financing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Doubtful [Member] | SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Doubtful [Member] | Real Estate Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Doubtful [Member] | Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Doubtful [Member] | Consumer Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Doubtful [Member] | Dairy And Livestock And Agribusiness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Doubtful [Member] | Municipal Lease Finance Receivables [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	0
Doubtful [Member] | Consumer Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans	0
Total	$ 0

Loans and Lease Finance Recei_6

Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Loan, Including PCI Loans by Internal Risk Ratings (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate, Non-owner occupied		$ 3,290,967
Total loans	$ 8,407,872	7,568,319
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	817,056	935,127
Total loans	817,056
SBA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	304,987	305,008
Total loans	304,987
Commercial real estate, owner occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		2,083,650
Total loans	2,125,200	2,083,650
Construction, Speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		106,895
Construction, Non-speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		10,030
SFR mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	274,731	283,468
Total loans	274,731
Dairy & Livestock and Agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	252,802	383,709
Total loans	252,802
Municipal Lease Finance Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	38,040	53,146
Total loans	38,040	53,146
Consumer Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross	88,988	116,319
Total loans	88,988
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate, Non-owner occupied		3,280,580
Total loans	8,159,571	7,321,402
Pass [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		895,234
Total loans	773,570
Pass [Member] | SBA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		283,430
Total loans	287,456
Pass [Member] | Commercial real estate, owner occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		1,977,007
Pass [Member] | Construction, Speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		106,895
Pass [Member] | Construction, Non-speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		10,030
Pass [Member] | SFR mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		280,010
Total loans	270,379
Pass [Member] | Dairy & Livestock and Agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		320,670
Total loans	221,924
Pass [Member] | Municipal Lease Finance Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		52,676
Total loans	37,628
Pass [Member] | Consumer Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		114,870
Total loans	87,445
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate, Non-owner occupied		10,005
Total loans	175,589	173,486
Special Mention [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		35,473
Total loans	27,384
Special Mention [Member] | SBA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		11,032
Total loans	9,375
Special Mention [Member] | Commercial real estate, owner occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		78,208
Special Mention [Member] | Construction, Speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Special Mention [Member] | Construction, Non-speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Special Mention [Member] | SFR mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		1,957
Total loans	471
Special Mention [Member] | Dairy & Livestock and Agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		35,920
Total loans	13,240
Special Mention [Member] | Municipal Lease Finance Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		470
Total loans	412
Special Mention [Member] | Consumer Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		421
Total loans	828
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate, Non-owner occupied		382
Total loans	72,712	73,431
Substandard [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		4,420
Total loans	16,102
Substandard [Member] | SBA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		10,546
Total loans	8,156
Substandard [Member] | Commercial real estate, owner occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		28,435
Substandard [Member] | Construction, Speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Substandard [Member] | Construction, Non-speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Substandard [Member] | SFR mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		1,501
Total loans	3,881
Substandard [Member] | Dairy & Livestock and Agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		27,119
Total loans	17,638
Substandard [Member] | Municipal Lease Finance Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Total loans	0
Substandard [Member] | Consumer Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		1,028
Total loans	715
Doubtful & Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate, Non-owner occupied		0
Total loans	0	0
Doubtful & Loss [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Total loans	0
Doubtful & Loss [Member] | SBA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Total loans	0
Doubtful & Loss [Member] | Commercial real estate, owner occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Doubtful & Loss [Member] | Construction, Speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Doubtful & Loss [Member] | Construction, Non-speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Doubtful & Loss [Member] | SFR mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Total loans	0
Doubtful & Loss [Member] | Dairy & Livestock and Agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Total loans	0
Doubtful & Loss [Member] | Municipal Lease Finance Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		0
Total loans	0
Doubtful & Loss [Member] | Consumer Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable gross		$ 0
Total loans	$ 0

Loans and Lease Finance Recei_7

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 93,983	$ 67,132	$ 68,660	$ 63,613
Charge-offs	(231)	(68)	(484)	(428)
Recoveries	117	108	353	487
Provision for (Recapture of) loan losses	0	1,500	23,500	5,000
Ending Balance	93,869	68,672	93,869	68,672
Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			1,840
Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			68,660
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	7,991	7,857		7,528
Charge-offs	(161)	0	(172)	(48)
Recoveries	2	94	7	253
Provision for (Recapture of) loan losses	761	287	2,320	505
Ending Balance	8,593	8,238	8,593	8,238
Commercial and Industrial [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			(2,442)
Commercial and Industrial [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			8,880
Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3,651	1,119		1,078
Charge-offs	(47)	(65)	(203)	(295)
Recoveries	69	0	72	9
Provision for (Recapture of) loan losses	(169)	412	364	674
Ending Balance	3,504	1,466	3,504	1,466
Small Business Administration [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			1,818
Small Business Administration [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			1,453
SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	0		0
Charge-offs	0		0
Recoveries	0		0
Provision for (Recapture of) loan losses	0		0
Ending Balance	0		0
SBA - Paycheck Protection Program (PPP) [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			0
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	74,928	48,287		45,097
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for (Recapture of) loan losses	(473)	624	22,279	3,814
Ending Balance	74,455	48,911	74,455	48,911
Commercial Real Estate [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			3,547
Commercial Real Estate [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			48,629
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,290	871		981
Charge-offs	0	0	0	0
Recoveries	3	3	9	9
Provision for (Recapture of) loan losses	(355)	55	416	(61)
Ending Balance	1,938	929	1,938	929
Construction [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			655
Construction [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			858
SFR Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	222	2,323		2,197
Charge-offs	0	0	0	0
Recoveries	0	8	206	191
Provision for (Recapture of) loan losses	15	44	(265)	(13)
Ending Balance	237	2,375	237	2,375
SFR Mortgage [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			(2,043)
SFR Mortgage [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			2,339
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3,379	5,341		5,225
Charge-offs	0	0	0	(78)
Recoveries	0	0	0	19
Provision for (Recapture of) loan losses	330	88	(1,360)	263
Ending Balance	3,709	5,429	3,709	5,429
Dairy & Livestock and Agribusiness [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			(186)
Dairy & Livestock and Agribusiness [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			5,255
Municipal Lease Finance Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	302	726		775
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for (Recapture of) loan losses	(153)	(64)	(58)	(113)
Ending Balance	149	662	149	662
Municipal Lease Finance Receivables [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			(416)
Municipal Lease Finance Receivables [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			623
Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,220	608		732
Charge-offs	(23)	(3)	(109)	(7)
Recoveries	43	3	59	6
Provision for (Recapture of) loan losses	44	54	(196)	(69)
Ending Balance	$ 1,284	$ 662	1,284	$ 662
Consumer and Other Loans [Member] | Impact of ASU 2016-13 Adoption [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			907
Consumer and Other Loans [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance			$ 623

Loans and Lease Finance Recei_8

Loans and Lease Finance Receivables and Allowance for Credit Losses - Schedule of Recorded Investment in Loans Held-for-Investment and Related Allowance for Loan Losses by Loan Type (Detail) $ in Thousands	Sep. 30, 2019USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	$ 9,780
Recorded Investment in Loans, Collectively Evaluated for Impairment	7,488,537
Allowance for Loan Losses, Individually Evaluated for Impairment	540
Allowance for Loan Losses, Collectively Evaluated for Impairment	68,132
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	1,638
Recorded Investment in Loans, Collectively Evaluated for Impairment	920,040
Allowance for Loan Losses, Individually Evaluated for Impairment	254
Allowance for Loan Losses, Collectively Evaluated for Impairment	7,984
Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	3,248
Recorded Investment in Loans, Collectively Evaluated for Impairment	316,323
Allowance for Loan Losses, Individually Evaluated for Impairment	286
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,180
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	1,500
Recorded Investment in Loans, Collectively Evaluated for Impairment	5,374,168
Allowance for Loan Losses, Individually Evaluated for Impairment	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	48,911
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	0
Recorded Investment in Loans, Collectively Evaluated for Impairment	119,931
Allowance for Loan Losses, Individually Evaluated for Impairment	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	929
SFR Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	3,009
Recorded Investment in Loans, Collectively Evaluated for Impairment	275,635
Allowance for Loan Losses, Individually Evaluated for Impairment	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	2,375
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	0
Recorded Investment in Loans, Collectively Evaluated for Impairment	311,229
Allowance for Loan Losses, Individually Evaluated for Impairment	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	5,429
Municipal Lease Finance Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	0
Recorded Investment in Loans, Collectively Evaluated for Impairment	54,468
Allowance for Loan Losses, Individually Evaluated for Impairment	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	662
Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	385
Recorded Investment in Loans, Collectively Evaluated for Impairment	116,743
Allowance for Loan Losses, Individually Evaluated for Impairment	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	$ 662

Loans and Lease Finance Recei_9

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 ($)	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 13,769,000
Total Past Due and Accruing		$ 1,653,000
Nonaccrual	11,775,000	5,277,000
Loans Not Past Due	8,394,103,000
Loans Not Past Due and accruing		7,561,389,000
Nonaccrual with No Allowance for Credit Losses	8,785,000
Loans Past Due Over 89 Days Still Accruing	0
Total loans	8,407,872,000	7,568,319,000
30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	4,118,000
Total Past Due and Accruing		878,000
Nonaccrual	571,000	59,000
60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,328,000
Total Past Due and Accruing		775,000
Nonaccrual	2,100,000	1,100,000
Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	7,323,000
Nonaccrual	7,300,000	2,900,000
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	5,351,000
Total Past Due and Accruing		2,000
Nonaccrual	1,822,000	1,266,000
Loans Not Past Due	811,705,000
Loans Not Past Due and accruing		933,859,000
Nonaccrual with No Allowance for Credit Losses	1,421,000
Loans Past Due Over 89 Days Still Accruing	0
Total loans	817,056,000	935,127,000
Commercial and Industrial [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	3,582,000
Total Past Due and Accruing		2,000
Commercial and Industrial [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,209,000	0
Commercial and Industrial [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	560,000
Small Business Administration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,515,000
Total Past Due and Accruing		1,402,000
Nonaccrual	1,724,000	2,032,000
Loans Not Past Due	303,472,000
Loans Not Past Due and accruing		301,574,000
Nonaccrual with No Allowance for Credit Losses	850,000
Loans Past Due Over 89 Days Still Accruing	0
Total loans	304,987,000	305,008,000
Small Business Administration [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	468,000
Total Past Due and Accruing		870,000
Small Business Administration [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	270,000
Total Past Due and Accruing		532,000
Small Business Administration [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	777,000
SBA - Paycheck Protection Program (PPP) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0
Nonaccrual	0
Loans Not Past Due	1,101,142,000
Nonaccrual with No Allowance for Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	0
Total loans	1,101,142,000
SBA - Paycheck Protection Program (PPP) [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0
SBA - Paycheck Protection Program (PPP) [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	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
Commercial Real Estate Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	3,770,000
Total Past Due and Accruing		0
Nonaccrual	4,766,000	479,000
Loans Not Past Due	2,121,430,000
Loans Not Past Due and accruing		2,083,171,000
Nonaccrual with No Allowance for Credit Losses	4,766,000
Loans Past Due Over 89 Days Still Accruing	0
Total loans	2,125,200,000	2,083,650,000
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	0	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	3,770,000
Commercial Real Estate Non-owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,715,000
Total Past Due and Accruing		0
Nonaccrual	1,715,000	245,000
Loans Not Past Due	3,301,308,000
Loans Not Past Due and accruing		3,290,722,000
Nonaccrual with No Allowance for Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	0
Total loans	3,303,023,000	3,290,967,000
Commercial Real Estate Non-owner Occupied [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0	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	1,715,000
Construction Speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0
Total Past Due and Accruing		0
Nonaccrual	0	0
Loans Not Past Due	94,232,000
Loans Not Past Due and accruing		106,895,000
Nonaccrual with No Allowance for Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	0
Total loans	94,232,000	106,895,000
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
Construction Non-speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0
Total Past Due and Accruing		0
Nonaccrual	0	0
Loans Not Past Due	7,671,000
Loans Not Past Due and accruing		10,030,000
Nonaccrual with No Allowance for Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	0
Total loans	7,671,000	10,030,000
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
SFR Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	467,000
Total Past Due and Accruing		249,000
Nonaccrual	675,000	878,000
Loans Not Past Due	274,264,000
Loans Not Past Due and accruing		282,341,000
Nonaccrual with No Allowance for Credit Losses	675,000
Loans Past Due Over 89 Days Still Accruing	0
Total loans	274,731,000	283,468,000
SFR Mortgage [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0
Total Past Due and Accruing		6,000
SFR Mortgage [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0
Total Past Due and Accruing		243,000
SFR Mortgage [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	467,000
Dairy & Livestock and Agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	849,000
Total Past Due and Accruing		0
Nonaccrual	849,000	0
Loans Not Past Due	251,953,000
Loans Not Past Due and accruing		383,709,000
Nonaccrual with No Allowance for Credit Losses	849,000
Loans Past Due Over 89 Days Still Accruing	0
Total loans	252,802,000	383,709,000
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	849,000	0
Dairy & Livestock and Agribusiness [Member] | Greater than 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0
Municipal Lease Finance Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	0
Total Past Due and Accruing		0
Nonaccrual	0	0
Loans Not Past Due	38,040,000
Loans Not Past Due and accruing		53,146,000
Nonaccrual with No Allowance for Credit Losses	0
Loans Past Due Over 89 Days Still Accruing	0
Total loans	38,040,000	53,146,000
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
Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	102,000
Total Past Due and Accruing		0
Nonaccrual	224,000	377,000
Loans Not Past Due	88,886,000
Loans Not Past Due and accruing		115,942,000
Nonaccrual with No Allowance for Credit Losses	224,000
Loans Past Due Over 89 Days Still Accruing	0
Total loans	88,988,000	116,319,000
Consumer and Other Loans [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	68,000	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	$ 34,000

Loans and Lease Finance Rece_10

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 ($)	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing loans, current	$ 1,800,000	$ 1,200,000
Nonaccrual	11,775,000	5,277,000
Small Business Administration Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	1,724,000	2,032,000
Small Business Administration Loans [Member] | Financial Guarantee [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	51,000	2,000,000
30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	571,000	59,000
60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	2,100,000	1,100,000
90+ Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 7,300,000	$ 2,900,000

Loans and Lease Finance Rece_11

Loans and Lease Finance Receivables and Allowance for Credit Losses - Schedule of Held-for-Investment Loans, Individually Evaluated for Impairment by Class of Loans (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	$ 8,723		$ 7,811
Recorded Investment, With a related allowance recorded	1,057		578
Recorded Investment, Total impaired loans	9,780	$ 2,200	8,389
Unpaid Principal Balance, With no related allowance recorded	10,749		9,075
Unpaid Principal Balance, With a related allowance recorded	1,161		671
Unpaid Principal Balance, Total impaired loans	11,910		9,746
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With a related allowance recorded	540		508
Related Allowance, Total impaired loans	540		508
Average Recorded Investment, With no related allowance recorded	9,186
Average Recorded Investment, With a related allowance recorded	1,645
Average Recorded Investment, Total impaired loans	10,831
Interest Income Recognized, With no related allowance recorded	118
Interest Income Recognized, With a related allowance recorded	0
Interest Income Recognized, Total impaired loans	118
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	1,382		1,091
Recorded Investment, With a related allowance recorded	256		253
Unpaid Principal Balance, With no related allowance recorded	1,537		1,261
Unpaid Principal Balance, With a related allowance recorded	345		347
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With a related allowance recorded	254		251
Average Recorded Investment, With no related allowance recorded	1,560
Average Recorded Investment, With a related allowance recorded	829
Interest Income Recognized, With no related allowance recorded	4
Interest Income Recognized, With a related allowance recorded	0
Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	2,447		2,243
Recorded Investment, With a related allowance recorded	801		325
Unpaid Principal Balance, With no related allowance recorded	3,554		2,734
Unpaid Principal Balance, With a related allowance recorded	816		324
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With a related allowance recorded	286		257
Average Recorded Investment, With no related allowance recorded	2,606
Average Recorded Investment, With a related allowance recorded	816
Interest Income Recognized, With no related allowance recorded	31
Interest Income Recognized, With a related allowance recorded	0
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	494		479
Recorded Investment, With a related allowance recorded	0		0
Unpaid Principal Balance, With no related allowance recorded	614		613
Unpaid Principal Balance, With a related allowance recorded	0		0
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With a related allowance recorded	0		0
Average Recorded Investment, With no related allowance recorded	508
Average Recorded Investment, With a related allowance recorded	0
Interest Income Recognized, With no related allowance recorded	0
Interest Income Recognized, With a related allowance recorded	0
Commercial Real Estate Non-owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	1,006		642
Recorded Investment, With a related allowance recorded	0		0
Unpaid Principal Balance, With no related allowance recorded	1,190		643
Unpaid Principal Balance, With a related allowance recorded	0		0
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With a related allowance recorded	0		0
Average Recorded Investment, With no related allowance recorded	1,052
Average Recorded Investment, With a related allowance recorded	0
Interest Income Recognized, With no related allowance recorded	21
Interest Income Recognized, With a related allowance recorded	0
Construction Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	0		0
Recorded Investment, With a related allowance recorded	0		0
Unpaid Principal Balance, With no related allowance recorded	0		0
Unpaid Principal Balance, With a related allowance recorded	0		0
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With a related allowance recorded	0		0
Average Recorded Investment, With no related allowance recorded	0
Average Recorded Investment, With a related allowance recorded	0
Interest Income Recognized, With no related allowance recorded	0
Interest Income Recognized, With a related allowance recorded	0
Construction Non-speculative [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	0		0
Recorded Investment, With a related allowance recorded	0		0
Unpaid Principal Balance, With no related allowance recorded	0		0
Unpaid Principal Balance, With a related allowance recorded	0		0
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With a related allowance recorded	0		0
Average Recorded Investment, With no related allowance recorded	0
Average Recorded Investment, With a related allowance recorded	0
Interest Income Recognized, With no related allowance recorded	0
Interest Income Recognized, With a related allowance recorded	0
SFR Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	3,009		2,979
Recorded Investment, With a related allowance recorded	0		0
Unpaid Principal Balance, With no related allowance recorded	3,338		3,310
Unpaid Principal Balance, With a related allowance recorded	0		0
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With a related allowance recorded	0		0
Average Recorded Investment, With no related allowance recorded	3,059
Average Recorded Investment, With a related allowance recorded	0
Interest Income Recognized, With no related allowance recorded	62
Interest Income Recognized, With a related allowance recorded	0
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	0		0
Recorded Investment, With a related allowance recorded	0		0
Unpaid Principal Balance, With no related allowance recorded	0		0
Unpaid Principal Balance, With a related allowance recorded	0		0
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With a related allowance recorded	0		0
Average Recorded Investment, With no related allowance recorded	0
Average Recorded Investment, With a related allowance recorded	0
Interest Income Recognized, With no related allowance recorded	0
Interest Income Recognized, With a related allowance recorded	0
Municipal Lease Finance Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	0		0
Recorded Investment, With a related allowance recorded	0		0
Unpaid Principal Balance, With no related allowance recorded	0		0
Unpaid Principal Balance, With a related allowance recorded	0		0
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With a related allowance recorded	0		0
Average Recorded Investment, With no related allowance recorded	0
Average Recorded Investment, With a related allowance recorded	0
Interest Income Recognized, With no related allowance recorded	0
Interest Income Recognized, With a related allowance recorded	0
Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	385		377
Recorded Investment, With a related allowance recorded	0		0
Unpaid Principal Balance, With no related allowance recorded	516		514
Unpaid Principal Balance, With a related allowance recorded	0		0
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With a related allowance recorded	0		$ 0
Average Recorded Investment, With no related allowance recorded	401
Average Recorded Investment, With a related allowance recorded	0
Interest Income Recognized, With no related allowance recorded	0
Interest Income Recognized, With a related allowance recorded	$ 0

Loans and Lease Finance Rece_12

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Modifications [Line Items]
Transfer to OREO			$ 0	$ (9,450)
Performing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	$ 2,771	$ 3,219	3,112	3,594
New modifications	0	0	0	0
Payoffs/payments, net and other	(554)	(51)	(895)	(426)
TDRs returned to accrual status	0	0	0	0
TDRs placed on nonaccrual status	0	0	0	0
Ending balance	2,217	3,168	2,217	3,168
Nonperforming TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	0	263	244	3,509
New modifications	0	0	0	0
Charge-offs	0	0	0	(78)
Transfer to OREO	0	0	0	(2,275)
Payoffs/payments, net and other	0	(14)	(244)	(907)
TDRs returned to accrual status	0	0	0	0
TDRs placed on nonaccrual status	0	0	0	0
Ending balance	0	249	0	249
Total TDRs	$ 2,217	$ 3,417	$ 2,217	$ 3,417

Loans and Lease Finance Rece_13

Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Recorded Investment in Collateral-Dependent loans (Detail) $ in Thousands	Sep. 30, 2020USD ($)Collateral
Financing Receivable, Modifications [Line Items]
Real Estate	$ 8,874
Business Assets	6,049
Other	$ 89
Number of Instruments Dependent on Collateral | Collateral	40
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 145
Business Assets	4,703
Other	$ 62
Number of Instruments Dependent on Collateral | Collateral	14
Small Business Administration [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 1,015
Business Assets	497
Other	$ 7
Number of Instruments Dependent on Collateral | Collateral	11
SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0
Business Assets	0
Other	$ 0
Number of Instruments Dependent on Collateral | Collateral	0
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Business Assets	$ 0
Other	0
Construction [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	0
Business Assets	0
Other	$ 0
Number of Instruments Dependent on Collateral | Collateral	0
SFR Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 675
Business Assets	0
Other	$ 0
Number of Instruments Dependent on Collateral | Collateral	3
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0
Business Assets	849
Other	$ 0
Number of Instruments Dependent on Collateral | Collateral	1
Municipal Lease Finance Receivables [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0
Business Assets	0
Other	$ 0
Number of Instruments Dependent on Collateral | Collateral	0
Consumer and Other Loans [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 203
Business Assets	0
Other	$ 20
Number of Instruments Dependent on Collateral | Collateral	4
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 6,836
Number of Instruments Dependent on Collateral | Collateral	7

Earnings Per Share Reconcilia_3

Earnings Per Share Reconciliation - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per common share	517,000	240,000	361,000	184,000

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings per common share:
Net earnings	$ 47,492	$ 50,423	$ 127,103	$ 156,546
Less: Net earnings allocated to restricted stock	175	116	407	390
Net earnings allocated to common shareholders	$ 47,317	$ 50,307	$ 126,696	$ 156,156
Weighted average shares outstanding	135,017	139,824	136,369	139,730
Basic earnings per common share	$ 0.35	$ 0.36	$ 0.93	$ 1.12
Diluted earnings per common share:
Net income allocated to common shareholders	$ 47,317	$ 50,307	$ 126,696	$ 156,156
Weighted average shares outstanding	135,017	139,824	136,369	139,730
Incremental shares from assumed exercise of outstanding options	167	151	167	217
Diluted weighted average shares outstanding	135,184	139,975	136,536	139,947
Diluted earnings per common share	$ 0.35	$ 0.36	$ 0.93	$ 1.12

Fair Value Information - Assets

Fair Value Information - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, liabilities	$ 520,675	$ 440,161
Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets
Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets	37,255	11,502
Interest rate swaps, liabilities	37,255	11,502
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	2,242,901	1,751,759
Total liabilities	37,255	11,502
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	36,468	39,354
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	1,756,871	1,206,313
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	411,494	493,710
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	813	880
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	2,205,646	1,740,257
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	37,255	11,502
Interest rate swaps, liabilities	37,255	11,502
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	2,242,901	1,751,759
Total liabilities	37,255	11,502
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	36,468	39,354
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	1,756,871	1,206,313
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	411,494	493,710
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	813	880
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	2,205,646	1,740,257
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	37,255	11,502
Interest rate swaps, liabilities	$ 37,255	$ 11,502

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	Sep. 30, 2020	Dec. 31, 2019
Description of assets
Total assets	$ 4,232	$ 828
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	2,034	251
Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	203	513
Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	1,295	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	0	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	700	64
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 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 3 [Member]
Description of assets
Total assets	7,975	1,056
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	3,273	253
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	712	359
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	1,715	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	0	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	2,275	444
Carrying Value [Member]
Description of assets
Total assets	7,975	1,056
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	3,273	253
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	712	359
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	1,715	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	0	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	$ 2,275	$ 444

Fair Value Information - Estima

Fair Value Information - Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Assets
Total cash and cash equivalents	$ 1,484,953	$ 185,518	$ 437,548	$ 163,948
Investment securities available-for-sale	2,205,646	1,740,257
Investment securities held-to-maturity	577,694	674,452
Total loans, net of allowance for loan losses	8,314,003	7,495,917
Deposits:
Interest-bearing	4,249,411	3,459,411
Junior subordinated debentures	25,774	25,774
Swaps	520,675	440,161
Carrying Value [Member]
Assets
Total cash and cash equivalents	1,484,953	185,518
Interest-earning balances due from depository institutions	44,367	2,931
Investment securities available-for-sale	2,205,646	1,740,257
Investment securities held-to-maturity	577,694	674,452
Total loans, net of allowance for loan losses	8,314,003	7,495,917
Swaps	37,255	11,502
Deposits:
Interest-bearing	4,249,411	3,459,411
Borrowings	493,420	428,659
Junior subordinated debentures	25,774	25,774
Swaps	37,255	11,502
Estimated Fair Value [Member]
Assets
Total cash and cash equivalents	1,484,953	185,518
Interest-earning balances due from depository institutions	44,414	2,938
Investment securities available-for-sale	2,205,646	1,740,257
Investment securities held-to-maturity	603,522	678,948
Total loans, net of allowance for loan losses	8,326,796	7,343,167
Swaps	37,255	11,502
Deposits:
Interest-bearing	4,250,728	3,457,922
Borrowings	493,344	428,330
Junior subordinated debentures	18,917	20,669
Swaps	37,255	11,502
Estimated Fair Value [Member] | Level 1 [Member]
Assets
Total cash and cash equivalents	1,484,953	185,518
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	44,414	2,938
Investment securities available-for-sale	2,205,646	1,740,257
Investment securities held-to-maturity	603,522	678,948
Total loans, net of allowance for loan losses	0	0
Swaps	37,255	11,502
Deposits:
Interest-bearing	4,250,728	3,457,922
Borrowings	493,344	428,330
Junior subordinated debentures	0	0
Swaps	37,255	11,502
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	8,326,796	7,343,167
Swaps	0	0
Deposits:
Interest-bearing	0	0
Borrowings	0	0
Junior subordinated debentures	18,917	20,669
Swaps	$ 0	$ 0

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2020USD ($)Agreement	Dec. 31, 2019USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets and liabilities offset in balance sheet	$ 0
Total notional amount of the Company's swaps	$ 455,200,000	$ 260,000,000
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	133
Total notional amount of the Company's swaps	$ 455,200,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Fair Value of Derivative Instruments (Detail) - Derivatives Not Designated as Hedging Instruments [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 37,255	$ 11,502
Other Assets [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	37,255	11,502
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	37,255	11,502
Other Liabilities [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 37,255	$ 11,502

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivatives, Fair Value [Line Items]
Amount of Gain Recognized in Income on Derivative Instruments	$ 1,591	$ 378	$ 4,149	$ 1,135
Interest Rate Swaps [Member] | Other Income [Member]
Derivatives, Fair Value [Line Items]
Amount of Gain Recognized in Income on Derivative Instruments	$ 1,591	$ 378	$ 4,149	$ 1,135

Other Comprehensive Income - Su

Other Comprehensive Income - Summary of Components of OCI (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity [Abstract]
Net change in fair value recorded in accumulated OCI, Before-tax	$ (1,974)	$ 5,672	$ 33,382	$ 44,586
Net change in fair value recorded in accumulated OCI, Tax effect	584	(1,677)	(9,869)	(13,181)
Net change in fair value recorded in accumulated OCI, After-tax	(1,390)	3,995	23,513	31,405
Net realized gain (loss) reclassified into earnings Before-tax	0	(5)	0	(5)
Net realized gain reclassified into earnings Tax effect	0	1	0	1
Net realized gain reclassified into earnings After-tax	0	(4)	0	(4)
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, Before-tax	(30)	(249)	(48)	(1,450)
Amortization of unrealized gains (losses) on securities transferred from available-for-sale to held-to-maturity, Tax effect	9	74	14	429
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, After-tax	(21)	(175)	(34)	(1,021)
Net change, Before-tax	(2,004)	5,418	33,334	43,131
Net change, Tax effect	593	(1,602)	(9,855)	(12,751)
Net change, After-tax	$ (1,411)	$ 3,816	$ 23,479	$ 30,380

Balance Sheet Offsetting - Sche

Balance Sheet Offsetting - Schedule of Balance Sheet Offsetting (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Offsetting Assets Liabilities [Line Items]
Financial liabilities, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	$ 520,675	$ 440,278
Financial liabilities, Gross Amounts Offset in the Condensed Consolidated Balance Sheets		(117)
Financial liabilities, Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets	520,675	440,161
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments		117
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(565,481)	(533,450)
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	(44,806)	(93,172)
Repurchase Agreements [Member]
Offsetting Assets Liabilities [Line Items]
Financial liabilities, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	483,420	428,659
Financial liabilities, Gross Amounts Offset in the Condensed Consolidated Balance Sheets
Financial liabilities, Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets	483,420	428,659
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(498,535)	(510,138)
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	(15,115)	(81,479)
Interest Rate Swaps [Member]
Offsetting Assets Liabilities [Line Items]
Financial assets, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	37,255	11,502
Financial assets, Gross Amounts Offset in the Condensed Consolidated Balance Sheets
Financial assets, Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	37,255	11,502
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	37,255	11,502
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	37,255	11,502
Financial assets, Gross Amounts Offset in the Condensed Consolidated Balance Sheets
Financial assets, Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	37,255	11,502
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	37,255	11,502
Financial liabilities, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	37,255	11,619
Financial liabilities, Gross Amounts Offset in the Condensed Consolidated Balance Sheets		(117)
Financial liabilities, Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets	37,255	11,502
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments		117
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(66,946)	(23,312)
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	$ (29,691)	$ (11,693)

Leases - Components of lease co

Leases - Components of lease costs and supplemental information related to leases (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Lease Assets and Liabilities
ROU assets	$ 19,771		$ 19,771		$ 18,522
Total lease liabilities	21,939		21,939		$ 21,392
Lease Cost
Operating lease expense	1,654	$ 1,628	4,900	$ 5,634
Sublease income	0	0		0
Total lease expense	1,654	1,628	4,900	5,634
Other Information
Operating cash outflows from operating leases, net	$ 1,826	$ 1,640	$ 5,630	$ 6,499
Lease Term and Discount Rate
Weighted average remaining lease term (years)	4 years 3 months 14 days		4 years 3 months 14 days		4 years 2 months 4 days
Weighted average discount rate	2.86%		2.86%		3.34%

Leases - Future lease payments

Leases - Future lease payments required for leases that have initial or remaining non-cancelable lease terms (Detail) $ in Thousands	Sep. 30, 2020USD ($)
2020 (excluding the nine months ended September 30, 2020)	$ 1,781
2021	6,656
2022	5,475
2023	3,615
2024	2,428
Thereafter	3,461
Total future lease payments	23,416
Less: Imputed interest	(1,477)
Present value of lease liabilities	$ 21,939

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Noninterest income:
Gain on OREO, net			$ 0	$ 105
Other	$ 3,160	$ 2,297	8,736	6,944
Total noninterest income	13,153	11,894	36,945	46,402
Service Charges on Deposit Accounts [Member]
Noninterest income:
Revenue from contract with customer	3,970	4,833	12,555	15,039
Trust and Investment Services [Member]
Noninterest income:
Revenue from contract with customer	2,405	2,330	7,302	6,964
Bankcard Services [Member]
Noninterest income:
Revenue from contract with customer	456	637	1,438	2,614
Accounting Standards Update 2014-09 [Member]
Noninterest income:
Gain on OREO, net	13	0	23	129
Other	3,160	2,292	8,736	6,939
Total noninterest income	10,004	10,092	30,054	31,685
Accounting Standards Update 2014-09 [Member] | Service Charges on Deposit Accounts [Member]
Noninterest income:
Revenue from contract with customer	3,970	4,833	12,555	15,039
Accounting Standards Update 2014-09 [Member] | Trust and Investment Services [Member]
Noninterest income:
Revenue from contract with customer	2,405	2,330	7,302	6,964
Accounting Standards Update 2014-09 [Member] | Bankcard Services [Member]
Noninterest income:
Revenue from contract with customer	456	637	1,438	2,614
Accounting Standards Update 2014-09 Not Adopted [Member]
Noninterest income:
Total noninterest income	$ 3,149	$ 1,802	$ 6,891	$ 14,717