CVB Financial (CVBF) 10-K 1 Mar 19 2018 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 15, 2019	Jun. 30, 2018
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Entity Registrant Name	CVB FINANCIAL CORP
Entity Central Index Key	354,647
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 2,304,857,385
Trading Symbol	CVBF
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		139,973,017

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 144,008	$ 119,841
Interest-earning balances due from Federal Reserve	19,940	24,536
Total cash and cash equivalents	163,948	144,377
Interest-earning balances due from depository institutions	7,670	17,952
Investment securities available-for-sale, at fair value (with amortized cost of $1,757,666 at December 31, 2018, and $2,078,131 at December 31, 2017)	1,734,085	2,080,985
Investment securities held-to-maturity (with fair value of $721,537 at December 31, 2018, and $819,215 at December 31, 2017)	744,440	829,890
Total investment securities	2,478,525	2,910,875
Investment in stock of Federal Home Loan Bank (FHLB)	17,688	17,688
Loans and lease finance receivables	7,764,611	4,830,631
Allowance for loan losses	(63,613)	(59,585)
Net loans and lease finance receivables	7,700,998	4,771,046
Premises and equipment, net	58,193	46,166
Bank owned life insurance (BOLI)	220,758	146,486
Accrued interest receivable	30,649	22,704
Intangibles	53,784	6,838
Goodwill	666,539	116,564
Other real estate owned (OREO)	420	4,527
Income taxes	62,174	40,046
Other assets	67,807	25,317
Total assets	11,529,153	8,270,586
Deposits:
Noninterest-bearing	5,204,787	3,846,436
Interest-bearing	3,622,703	2,700,417
Total deposits	8,827,490	6,546,853
Customer repurchase agreements	442,255	553,773
Other borrowings	280,000	0
Deferred compensation	20,033	18,223
Junior subordinated debentures	25,774	25,774
Other liabilities	82,411	56,697
Total liabilities	9,677,963	7,201,320
Commitments and Contingencies
Stockholders' Equity
Common stock, authorized, 225,000,000 shares without par; issued and outstanding 140,000,017 at December 31, 2018, and 110,184,922 at December 31, 2017	1,293,669	573,453
Retained earnings	575,805	494,361
Accumulated other comprehensive (loss) income, net of tax	(18,284)	1,452
Total stockholders' equity	1,851,190	1,069,266
Total liabilities and stockholders' equity	$ 11,529,153	$ 8,270,586

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Amortized cost	$ 1,757,666	$ 2,078,131
Fair Value, Held-to-maturity	$ 721,537	$ 819,215
Common stock, par value
Common stock, authorized	225,000,000	225,000,000
Common stock, shares issued	140,000,017	110,184,922
Common stock, shares outstanding	140,000,017	110,184,922

Consolidated Statements of Earn

Consolidated Statements of Earnings and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest income:
Loans and leases, including fees	$ 293,284	$ 214,126	$ 192,992
Investment securities:
Investment securities available-for-sale	45,988	49,778	47,702
Investment securities held-to-maturity	18,901	21,015	20,227
Total investment income	64,889	70,793	67,929
Dividends from FHLB stock	2,045	1,375	2,224
Interest-earning deposits with other institutions and federal funds sold	1,642	932	1,905
Total interest income	361,860	287,226	265,050
Interest expense:
Deposits	9,825	6,044	5,957
Borrowings and customer repurchase agreements	2,067	1,579	1,478
Junior subordinated debentures	923	673	541
Total interest expense	12,815	8,296	7,976
Net interest income before provision for (recapture of) loan losses	349,045	278,930	257,074
Provision for (recapture of) loan losses	1,500	(8,500)	(6,400)
Net interest income after provision for (recapture of) loan losses	347,545	287,430	263,474
Noninterest income:
BOLI income	4,018	3,420	2,612
Gain on sale of loans	0	0	1,101
Gain (loss) on OREO, net	3,546	6	(20)
Other	6,588	9,632	4,277
Total noninterest income	43,481	42,118	35,552
Noninterest expense:
Salaries and employee benefits	100,601	87,065	82,630
Occupancy and equipment	20,841	16,756	15,641
Professional services	6,477	5,940	5,054
Software licenses and maintenance	8,655	6,385	5,465
Marketing and promotion	5,302	4,839	5,027
Recapture of provision for unfunded loan commitments	(250)	(400)	(450)
Amortization of intangible assets	5,254	1,329	1,106
Acquisition related expenses	16,404	2,251	1,897
Impairment loss on asset held-for-sale	0	0	2,558
Legal settlement	0	0	1,500
Other	16,627	16,588	16,312
Total noninterest expense	179,911	140,753	136,740
Earnings before income taxes	211,115	188,795	162,286
Income taxes	59,112	84,384	60,857
Net earnings	152,003	104,411	101,429
Other comprehensive loss:
Unrealized loss on securities arising during the period, before tax	(28,526)	(14,629)	(17,966)
Less: Reclassification adjustment for net gain on securities included in net income	0	(402)	(548)
Other comprehensive loss, before tax	(28,526)	(15,031)	(18,514)
Add: Income tax benefit related to items of other comprehensive loss	8,434	6,312	7,776
Other comprehensive loss, net of tax	(20,092)	(8,719)	(10,738)
Comprehensive income	$ 131,911	$ 95,692	$ 90,691
Basic earnings per common share	$ 1.25	$ 0.95	$ 0.94
Diluted earnings per common share	$ 1.24	$ 0.95	$ 0.94
Service Charges on Deposit Accounts [Member]
Noninterest income:
Revenue from contract with customer, including assessed tax	$ 17,070	$ 15,809	$ 15,066
Trust and Investment Services [Member]
Noninterest income:
Revenue from contract with customer, including assessed tax	8,774	9,845	9,595
Bankcard Services [Member]
Noninterest income:
Revenue from contract with customer, including assessed tax	$ 3,485	$ 3,406	$ 2,921

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Valley Commerce Bancorp [Member]	Common Stock [Member]	Common Stock [Member]Valley Commerce Bancorp [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2015	$ 923,399		$ 502,571		$ 399,919	$ 20,909
Beginning balance, shares at Dec. 31, 2015			106,385
Repurchase of common stock	(1,907)		$ (1,907)
Repurchase of common stock, shares			(116)
Issuance of common stock for acquisition	21,642		$ 21,642
Issuance of common stock for acquisition, shares			1,394
Exercise of stock options	5,151		$ 5,151
Exercise of stock options, shares			483
Tax benefit from exercise of stock options	932		$ 932
Shares issued pursuant to stock-based compensation plan	2,803		$ 2,803
Shares issued pursuant to stock-based compensation plan, shares			106
Cash dividends declared on common stock	(51,849)				(51,849)
Net earnings	101,429				101,429
Other comprehensive loss	(10,738)					(10,738)
Ending balance at Dec. 31, 2016	990,862		$ 531,192		449,499	10,171
Ending balance, shares at Dec. 31, 2016			108,252
Cumulative adjustment upon adoption of ASU 2016-09	50		$ 116		(66)
Repurchase of common stock	(1,128)		$ (1,128)
Repurchase of common stock, shares			(50)
Issuance of common stock for acquisition		$ 37,637		$ 37,637
Issuance of common stock for acquisition, shares				1,634
Exercise of stock options	2,683		$ 2,683
Exercise of stock options, shares			283
Shares issued pursuant to stock-based compensation plan	2,953		$ 2,953
Shares issued pursuant to stock-based compensation plan, shares			66
Cash dividends declared on common stock	(59,483)				(59,483)
Net earnings	104,411				104,411
Other comprehensive loss	(8,719)					(8,719)
Ending balance at Dec. 31, 2017	1,069,266		$ 573,453		494,361	1,452
Ending balance, shares at Dec. 31, 2017			110,185
Cumulative adjustment upon adoption of ASU 2018-02					(356)	356
Repurchase of common stock	(7,760)		$ (7,760)
Repurchase of common stock, shares			(389)
Issuance of common stock for acquisition	722,767		$ 722,767
Issuance of common stock for acquisition, shares			29,842
Exercise of stock options	$ 1,701		$ 1,701
Exercise of stock options, shares	167		167
Shares issued pursuant to stock-based compensation plan	$ 3,508		$ 3,508
Shares issued pursuant to stock-based compensation plan, shares			195
Cash dividends declared on common stock	(70,203)				(70,203)
Net earnings	152,003				152,003
Other comprehensive loss	(20,092)					(20,092)
Ending balance at Dec. 31, 2018	$ 1,851,190		$ 1,293,669		$ 575,805	$ (18,284)
Ending balance, shares at Dec. 31, 2018			140,000

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Cash dividends per common share	$ 0.56	$ 0.54	$ 0.48

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows from Operating Activities
Interest and dividends received	$ 363,217	$ 296,885	$ 279,210
Service charges and other fees received	35,915	35,003	31,044
Interest paid	(13,241)	(8,286)	(7,987)
Net cash paid to vendors, employees and others	(168,573)	(114,424)	(125,726)
Income taxes	(48,876)	(70,250)	(51,495)
Payments to FDIC, loss share agreement	(64)	(519)	(514)
Net cash provided by operating activities	168,378	138,409	124,532
Cash Flows from Investing Activities
Proceeds from redemption of FHLB stock	17,250	1,952	1,423
Net change in interest-earning balances from depository institutions	13,076	30,375	47,179
Proceeds from sale of investment securities held-for-sale	716,996	5,403	1,957
Proceeds from repayment of investment securities available-for-sale	383,155	425,666	448,823
Proceeds from maturity of investment securities available-for-sale	24,651	28,620	97,603
Purchases of investment securities available-for-sale	(98,709)	(319,603)	(461,674)
Proceeds from repayment and maturity of investment securities held-to-maturity	81,816	118,540	281,141
Purchases of investment securities held-to-maturity	0	(42,400)	(346,334)
Net (increase) decrease in equity investments	(24,863)	(1,470)	(1,277)
Net increase in loan and lease finance receivables	(179,054)	(111,879)	(203,040)
Proceeds from BOLI death benefit	2,383	2,653	0
Proceeds from sale of loans	0	0	6,417
Proceeds from sale of asset held-for-sale	0	4,012	0
Purchase of premises and equipment	(4,194)	(4,893)	(12,615)
Proceeds from sales of other real estate owned	8,067	0	2,102
Cash used in sale of branch, net	0	(25,266)	(8,217)
Cash acquired from acquisition, net of cash paid	(132,918)	28,325	(7,504)
Net cash provided by (used in) investing activities	807,656	140,035	(154,016)
Cash Flows from Financing Activities
Net (decrease) increase in other deposits	(444,316)	(50,611)	541,210
Net decrease in time deposits	(145,033)	(47,342)	(363,486)
Repayment of FHLB advances	(297,571)	0	(5,000)
Net increase (decrease) in other borrowings	114,000	(53,000)	7,000
Net decrease in customer repurchase agreements	(111,518)	(49,255)	(87,255)
Cash dividends on common stock	(65,966)	(57,047)	(51,625)
Repurchase of common stock	(7,760)	(1,128)	(1,907)
Proceeds from exercise of stock options	1,701	2,683	5,151
Tax benefit related to exercise of stock options	0	0	932
Net cash (used in) provided by financing activities	(956,463)	(255,700)	45,020
Net increase in cash and cash equivalents	19,571	22,744	15,536
Cash and cash equivalents, beginning of period	144,377	121,633	106,097
Cash and cash equivalents, end of period	163,948	144,377	121,633
Reconciliation of Net Earnings to Net Cash Provided by Operating Activities
Net earnings	152,003	104,411	101,429
Adjustments to reconcile net earnings to net cash provided by operating activities:
Gain on sale of loans	0	0	(1,101)
Gain on sale of branch	0	(906)	(272)
Gain on eminent domain condemnation	0	(2,894)
Gain loss on sale of investment securities	0	(402)	(548)
Impairment loss on asset held-for-sale	0	0	2,558
Gain on sale of other real estate owned	(3,546)	(6)	20
Increase in BOLI	(5,751)	(4,932)	(3,829)
Net amortization of premiums and discounts on investment securities	13,531	18,017	21,005
Accretion of discount for acquired loans, net	(15,400)	(5,159)	(4,028)
Recapture of provision for loan losses	1,500	(8,500)	(6,400)
Recapture of provision for unfunded loan commitments	(250)	(400)	(450)
Valuation adjustment on other real estate owned	0	0	337
Payments to FDIC, loss share agreement	(64)	(519)	(514)
Stock-based compensation	3,508	2,953	2,803
Depreciation and amortization, net	8,349	2,657	5,324
Change in other assets and liabilities	14,492	34,083	8,191
Total adjustments	16,375	33,998	23,103
Net cash provided by operating activities	168,378	138,409	124,532
Supplemental Disclosure of Non-cash Investing Activities
Securities purchased and not settled	0	0	23,777
Transfer of loans to other real estate owned	420	0	0
Issuance of common stock for acquisition	$ 722,767	$ 37,637	$ 21,642

Business

Business	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	1. BUSINESS The 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 businesses and individuals located in the Inland Empire, Los Angeles County, Orange County, San Diego County, Ventura County, Santa Barbara County, and the Central Valley area of California. The Bank operates 68 banking centers and three trust office locations. The Company is headquartered in the city of Ontario, California. On February 29, 2016, we acquired County Commerce Bank (“CCB”), headquartered in Oxnard, CA, with four branch locations in Ventura County with total assets of approximately $253 million. This acquisition extends our geographic footprint northward into the central coast of California. Our consolidated financial statements for 2016 include CCB operations, post-merger. See Note 4 — Business Combinations , included herein. On March 10, 2017, we completed the acquisition of Valley Commerce Bancorp (“VCBP”), the holding company for Valley Business Bank (“VBB”), headquartered in the Central Valley area of California with four branch locations and total assets of approximately $400 million. This acquisition strengthens our market share in the Central Valley area of California. Our consolidated financial statements for 2017 include VBB operations, post-merger. See Note 4 — Business Combinations , included herein. On August 10, 2018, we completed the acquisition of Community Bank (“CB”), headquartered in Pasadena, California with 16 banking centers located throughout the greater Los Angeles and Orange County areas and total assets of approximately $4.09 billion. Our condensed consolidated financial statements for 2018 include CB operations, post-merger. See Note 4 — Business Combinations , included herein.

Basis of Presentation

Basis of Presentation	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	2. BASIS OF PRESENTATION The accompanying 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-K and conform to practices within the banking industry and include all of the information and disclosures required by accounting principles generally accepted in the United States of America (“ ”) for financial reporting. Reclassification — Certain amounts in the prior periods’ financial statements and related footnote disclosures have been reclassified to conform to the current presentation with no impact on previously reported net income or stockholders’ equity.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Business Segments As of December 31, 2018, we operated as one reportable segment. The factors considered in making this determination include the nature of products and offered services, geographic regions in which we operate, the applicable regulatory environment, and the materiality of discrete financial information reviewed by our key decision makers. Through our network of banking centers, we provide relationship-based banking products, services and solutions for small to mid-sized companies, real estate investors, non-profit organizations, professionals and other individuals. Our products include loans for commercial businesses, commercial real estate, multi-family, construction, land, dairy & livestock and agribusiness, consumer and government-guaranteed small business loans. We also provide business deposit products and treasury cash management services, as well as deposit products to the owners and employees of the businesses we serve. The decision to combine our two reportable segments was made to align the segment reporting with the changes in our operations and reporting structure, and to be consistent with the level and materiality of information reviewed by our key decision makers. Cash and cash equivalents — Cash on hand, cash items in the process of collection, and amounts due from correspondent banks, the Federal Reserve Bank and interest-bearing balances due from depository institutions with initial terms of ninety days or less, are included in Cash and cash equivalents. Investment Securities — The Company classifies as held-to-maturity (“HTM”) those debt securities that the Company has the positive intent and ability to hold to maturity. Securities classified as trading are those securities that are bought and held principally for the purpose of selling them in the near term. All other debt and equity securities are classified as available-for-sale (“AFS”). Securities held-to-maturity are accounted for at cost and adjusted for amortization of premiums and accretion of discounts. Trading securities are accounted for at fair value with the unrealized gains and losses being included in current earnings. Available-for-sale securities are accounted for at fair value, with the net unrealized gains and losses, net of income tax effects, presented as a separate component of stockholders’ equity. Realized gains and losses on sales of securities are recognized in earnings at the time of sale and are determined on a specific-identification basis. Purchase premiums and discounts are recognized in interest income using the effective-yield method over the estimated terms of the securities. For mortgage-backed securities (“MBS”), the amortization or accretion is based on estimated average lives of the securities. The lives of these securities can fluctuate based on the amount of prepayments received on the underlying collateral of the securities. The Company’s investment in the Federal Home Loan Bank of San Francisco (“FHLB”) stock is carried at cost. At each reporting date, securities are assessed to determine whether there is an other-than-temporary impairment (“OTTI”). Other-than-temporary impairment on investment securities is not recognized in earnings when there are credit losses on a debt security for which management does not intend to sell and for which it is more-likely-than-not that the Company will not have to sell prior to recovery of the noncredit impairment. Otherwise, the portion of the total impairment that is attributable to the credit loss would be recorded in earnings, and the remaining difference between the debt security’s amortized cost and its fair value would be included in other comprehensive income. Loans and Lease Finance Receivables — Loans and lease finance receivables that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding, less deferred net loan origination fees and purchase price discounts. Purchase Credit Impaired (“PCI”) loans are those loans that when we acquired them were deemed to be impaired. PCI loans are included in total loans and lease finance receivables as of December 31, 2018. Refer to Note 7 — Loans and Lease Finance Receivables and Allowance for Loan Losses for total loans, excluding PCI loans, by type and to Note 6 — Acquired SJB Assets and FDIC Loss Sharing Asset for PCI loans by type. In the ordinary course of business, the Company enters into commitments to extend credit to its customers. To the extent that such commitments are unfunded, the related unfunded amounts are not reflected in the accompanying consolidated financial statements. The Company receives collateral to support loans, lease finance receivables, and commitments to extend credit for which collateral is deemed necessary. The most significant categories for which collateral is deemed necessary are real estate, principally commercial and industrial income-producing properties, Small Business Administration (“SBA”) loans, real estate mortgages, assets utilized in dairy & livestock and agribusiness, and various personal property assets utilized in commercial and industrial business governed by the Uniform Commercial Code. Nonrefundable fees and direct costs associated with the origination or purchase of loans are deferred and netted against outstanding loan balances. The deferred net loan fees and costs and purchase price discounts are recognized in interest income over the loan term using the effective-yield method. Interest on loans and lease finance receivables, excluding PCI loans, is credited to income based on the principal amounts of such loans or receivables outstanding. Loans are considered delinquent when principal or interest payments are past due 30 days or more and generally remain on accrual status between 30 and 89 days past due. Interest income is not recognized on loans and lease finance receivables when collection of interest is deemed by management to be doubtful. Loans, excluding PCI loans, on which the accrual of interest has been discontinued are designated as nonaccrual loans. In general, interest shall not accrue on any loan, excluding PCI loans, for which payment in full of principal and interest is not expected, or when the loan becomes 90 days past due, unless the loan is both well secured and in the process of collection. Factors considered in determining that the full collection of principal and interest is no longer probable include cash flow and liquidity of the borrower or property, the financial position of the guarantors and their willingness to support the loan as well as other factors, and this determination involves significant judgment. When an asset is placed on nonaccrual status, previously accrued but unpaid interest is reversed against income. Subsequent collections of cash are applied as reductions to the principal balance unless the loan is returned to accrual status. Interest is not recognized using a cash-basis method. Nonaccrual loans may be restored to accrual status when principal and interest become current and when the borrower is able to demonstrate payment performance for a sustained period, typically for six months. A nonaccrual loan may return to accrual status sooner based on other significant events or mitigating circumstances. This policy is consistently applied to all types of loans and lease finance receivables, excluding PCI loans. Troubled Debt Restructurings — Loans are reported as a Troubled Debt Restructuring (“TDR”) if the Company for economic or legal reasons related to the debtor’s financial difficulties grants a concession to the debtor that it would not otherwise consider. Types of modifications that may be considered concessions, which in turn result in a TDR include, but are not limited to, (i) a reduction of the stated interest rate for the remaining original life of the debt, (ii) an extension of the maturity date or dates at a stated interest rate lower than the current market rate for new debt with similar risk, (iii) a reduction of the face amount or maturity amount of the debt as stated in the instrument or other agreement, or (iv) a reduction of interest. As a result of these concessions, restructured loans are considered impaired, and the measurement of impairment is based on the Company’s policy for impaired loans. In addition, the Company may provide a concession to the debtor where it offers collateral and the value of such collateral is significant in proportion to the nature of the concession requested, and it substantially reduces the Company’s risk of loss. In such cases, these modifications are not considered a TDR as, in substance, no concession was made as a result of the significant additional collateral obtained. When determining whether or not a loan modification is a TDR under ASC 310-40, the Company evaluates loan modification requests from borrowers experiencing financial difficulties on a case-by-case basis. Any such modifications granted are unique to the borrower’s circumstances. Because of the Company’s focus on the commercial lending sector, each business customer has unique attributes, which in turn means that modifications of loans to those customers are not easily categorized by type, key features, or other terms, but are evaluated individually based on all relevant facts and circumstances pertaining to the modification request and the borrower’s/guarantor’s financial condition at the time of the request. The evaluation of whether or not a borrower is experiencing financial difficulties will include, among other relevant factors considered by the Company, a review of significant factors such as (i) whether the borrower is in default on any of its debt, (ii) whether the borrower is experiencing payment delinquency, (iii) whether the global cash flows of the borrower and the owner guarantor(s) of the borrower have diminished below what is necessary to service existing debt obligations, (iv) whether the borrower’s forecasted cash flows will be insufficient to service the debt in future periods or in accordance with the contractual terms of the existing agreement through maturity, (v) whether the borrower is unable to refinance the subject debt from other financing sources with similar terms, and (vi) whether the borrower is in jeopardy as a going-concern and/or considering bankruptcy. In any case, the debtor is presumed to be experiencing financial difficulties if the Company determines it is probable the debtor will default on the original loan if the modification is not granted. The types of loans subject to modification vary greatly, but during the subject period are concentrated in commercial and industrial loans, dairy & livestock and agribusiness loans, and term loans to commercial real estate investors. Some examples of key features include payment deferrals and delays, interest rate reductions, and extensions or renewals where the contract rate may or may not be below the market rate of interest for debt with similar characteristics as those of the modified debt. The typical length of the modified terms ranges from three (3) to twelve (12) months; however, all actual modified terms will depend on the facts, circumstances and attributes of the specific borrower requesting a modification. In general, after a careful evaluation of all relevant facts and circumstances taken together, including the nature of any concession, certain modification requests will result in troubled debt restructurings while certain other modifications will not, pursuant to the criteria and judgments as discussed throughout this report. In certain cases, modification requests for delays or deferrals of principal were evaluated and determined to be exempt from TDR reporting because they constituted insignificant delays under ASC 310-40-15. In situations where the Company has determined that the borrower is experiencing financial difficulties and is evaluating whether a concession is insignificant, and therefore does not result in a TDR, such analysis is based on an evaluation of both the amount and the timing of the restructured payments, including the following factors: 1. Whether the amount of the restructured payments subject to delay is insignificant relative to the unpaid principal balance or collateral value of the debt and will result in an insignificant shortfall in the contractual amount due; and 2. The delay is insignificant relative to any of the following: • The frequency of payments due; • The debt’s original contractual maturity; or • The debt’s original expected duration. Most modified loans not classified and accounted for as a TDR were performing and paying as agreed under their original terms in the six-month period immediately preceding a request for modification. Subsequently, these modified loans have continued to perform under the modified terms and deferrals that amounted to insignificant delays, which in turn is supported by the facts and circumstances of each individual customer and loan as described above. Payment performance continues to be monitored once modifications are made. The Company’s favorable experience regarding “re-defaults” under modified terms, or upon return of the loan to its original terms, indicates that such relief may improve ultimate collection and reduces the Company’s risk of loss. Impaired Loans — A loan is generally considered impaired when based on current events and information it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. A loan, including a restructured loan, for which there is an insignificant delay relative to the frequency of payments due, and/or the original contractual maturity, is not considered an impaired loan. Generally, impaired loans include loans on nonaccrual status and TDRs. The Company’s policy is to record a specific valuation allowance, which is included in the allowance for loan losses, or to charge off that portion of an impaired loan that represents the impairment or shortfall amount as determined utilizing one of the three methods described in ASC 310-10-35-22. Impairment on non-collateral dependent restructured loans is measured by comparing the present value of expected future cash flows on the restructured loans discounted at the interest rate of the original loan agreement to the loan’s carrying value. The impairment amount, if any, is generally charged off and recorded against the allowance for loan losses at the time impairment is measurable and a probable loss is determined. As a result, most of the TDRs have no specific allowance allocated because, consistent with the Company’s stated practice, any impairment is typically charged off in the period in which it is identified. The Company measures impairment based on the present value of expected future cash flows discounted at the loan’s effective interest rate, except that as a practical expedient, the Company may also measure impairment based on an observable market price for the loan, or the value of the collateral, for collateral dependent loans. Impairment on collateral dependent restructured loans is measured by determining the amount by which our recorded investment in the impaired loan exceeds the fair value of the collateral less estimated selling costs. The fair value is generally determined by one or more appraisals of the collateral, performed by a Company-approved third-party independent appraiser. The majority of impaired loans that are collateral dependent are charged off down to their estimated fair value of the collateral (less selling costs) at each reporting date based on current appraised value. Appraisals of the collateral for impaired collateral dependent loans are typically ordered at the time the loan is identified as showing signs of inherent weakness. These appraisals are normally updated at least annually, or more frequently, if there are concerns or indications that the value of the collateral may have changed significantly since the previous appraisal. On an exception basis, a specific valuation allowance is recorded on collateral dependent impaired loans when a current appraisal is not yet available, a recent appraisal is still under review or on single-family residential (“SFR”) mortgage loans if the loans are currently under review for a loan modification. Such valuation allowances are generally based on previous appraisals adjusted for current market conditions, based on preliminary appraisal values that are still being reviewed or for SFR mortgage loans under review for modification on an appraisal or indications of comparable home sales from external sources. Charge-offs of unsecured consumer loans are recorded when the loan reaches 120 days past due or sooner as circumstances indicate. Except for the charge-offs of unsecured consumer loans, the charge-off policy is applied consistently across all portfolio segments. Impaired single-family mortgage loans that have been modified in accordance with the various government modification programs are also measured based on the present value of the expected cash flows discounted at the loan’s pre-modification interest rate. The Company recognizes the change in present value attributable to the passage of time as interest income on such performing SFR mortgage loans and the amount of interest income recognized to date has been insignificant. Provision and Allowance for Loan Losses — The allowance for loan losses is management’s estimate of probable losses inherent in the loan and lease receivables portfolio. The allowance is increased by the provision for loan losses and recoveries of prior loan losses, and it is decreased by recapture of provision for loan losses and by charge-offs taken when management believes the uncollectability of any loan is confirmed. Subsequent recoveries, if any, are added to the allowance. The determination of the balance in the allowance for loan losses is based on an analysis of the loan and lease finance receivables portfolio using a systematic methodology and reflects an amount that, in management’s judgment, is appropriate to provide for probable loan losses inherent in the portfolio, after giving consideration to the character of the loan portfolio, current economic conditions, past loan loss experience, and such other factors that would deserve current recognition in estimating inherent loan losses. There are different qualitative risks for the loans in each portfolio segment. The construction and real estate segments’ predominant risk characteristic is the collateral and the geographic location of the property collateralizing the loan as well as the operating cash flow for commercial real estate properties. The commercial and industrial segment’s predominant risk characteristics are the cash flows of the businesses we lend to, the global cash flows and liquidity of the guarantors, as well as economic and market conditions. SBA 504 loans have risk characteristics that are similar to the real estate loan segment, while SBA 7(a) loans have risks that are similar to commercial and industrial loans. The dairy & livestock segment’s predominant risk characteristics are milk and beef prices in the market as well as the cost of feed and cattle. The Agribusiness segment’s predominant risk characteristics are the supply and demand conditions of the product, production seasonality, the scale of operations and ability to control costs, the availability and cost of water, and operator experience. The municipal lease segment’s predominant risk characteristics are the municipality’s general financial condition and tax revenues or if applicable the specific project related financial condition. The consumer, auto and other segment’s predominant risk characteristics are employment and income levels as they relate to consumers and cash flows of the businesses as they relate to equipment and vehicle leases to businesses. The Company’s methodology is consistently applied across all portfolio segments taking into account the applicable historical loss rates and the qualitative factors applicable to each pool of loans. A key factor in the Company’s methodology is the loan risk rating (Pass, Special Mention, Substandard, Doubtful and Loss). Loan risk ratings are updated as facts related to the loan or borrower become available. In addition, all term loans in excess of $1.0 million are subject to an annual internal credit review process where all factors underlying the loan, borrower and guarantors are subject to review which may result in changes to the loan’s risk rating. Our methodology for assessing the appropriateness of the allowance is conducted on a regular basis and considers the Bank’s overall loan portfolio. The Bank’s methodology consists of two major phases. In the first phase, individual loans are reviewed to identify loans for impairment. Impairment is measured based on the Company’s policy. If an impaired loan is determined to be a collateral dependent loan, the Company determines the fair value of the loan and if it is less than the recorded investment in the loan, the Company either recognizes an impairment as a specific allowance, or charges off the impaired balance if it determined that such amount represents a confirmed loss. For non-collateral dependent loans, the Company measures impairment based on the comparison of the loan’s carrying value to the present value of expected future cash flows discounted at the interest rate on the original loan agreement. Loans determined to be impaired are excluded from the formula allowance so as not to double count the loss exposure. The second phase is conducted by evaluating or segmenting the remainder of the loan portfolio into groups or pools of loans with similar characteristics. In this second phase, groups or pools of homogeneous loans are reviewed to determine a portfolio formula allowance. In the case of the portfolio formula allowance, homogeneous portfolios, such as small business loans, consumer loans, dairy & livestock and agribusiness loans, and real estate loans, are aggregated or pooled in determining the appropriate allowance. The Bank aggregates loans with similar risk characteristics into eight (8) segments in order to capture sufficient loss observations, and to produce more reliable historical loss rates for a given segment. The Bank’s methodology employs a look back period based on a through-the-cycle time frame beginning with the first quarter of 2009 through the fourth quarter of 2018. This time period continues to expand by one quarter until such time the current economic cycle ends, triggered by independent evidence that a recession has begun. The through-the-cycle look back period produces meaningful results that more appropriately reflect the level of incurred losses in the Bank’s loan portfolio given the current, extended credit cycle . Included in this second phase is our consideration of qualitative factors, including, all known relevant internal and external factors that may affect the collectability of a loan. This includes our estimates of the amounts necessary for concentrations, economic uncertainties, the volatility of the market value of collateral, and other relevant factors. Quantitative metrics are applied to each of the factors utilizing a comparison of current measurements to historical results within the range of the look back period. These qualitative factors are used to adjust the historical loan loss rates for each pool of loans to determine the probable loan losses inherent in the portfolio. Periodically, we assess various attributes utilized in adjusting our historical loss factors to reflect current economic conditions. The methodology is consistently applied across all the portfolio segments taking into account the applicable historical loss rates and the qualitative factors applicable to each pool of loans. Performing loans acquired through business combinations are evaluated separately by each acquired portfolio using the ALLL methodology. The results of the ALLL methodology are compared to the remaining fair value discounts by portfolio. If the remaining fair value discounts are determined to be insufficient, the allowance will be increased to reflect the additional risk in the portfolio. The ALLL methodology includes documentation, controls, validation and governance processes that ensure that the overall ALLL process is structured, transparent and repeatable. The Bank updates its ALLL methodology at least annually to ensure the relevance and reliability of key measures and assumptions that produce the allowance each quarter. Reserve for Unfunded Loan Commitments — We record a liability for probable and estimable losses associated with our unfunded loan commitments being funded and subsequently being charged off. Each quarter, every unfunded client loan commitment is allocated to a credit risk-rating in accordance with each client’s credit risk rating. We use the historical loan loss factors described under our allowance for loan losses to calculate the loan loss experience if unfunded loan commitments are funded. Separately, we use historical trends to calculate a probability of an unfunded loan commitment being funded. We apply the loan funding probability factor to risk-factor adjusted unfunded loan commitments by credit risk-rating to derive the reserve for unfunded loan commitments, similar to funded loans. The reserve for unfunded loan commitments also includes certain qualitative allocations as deemed appropriate by management. We include the reserve for unfunded loan commitments in other liabilities and the related provision in other noninterest expense. Purchase Credit Impaired Loans — PCI loans are those loans that we acquired in the San Joaquin Bank (“SJB”) acquisition for which we were “covered” for reimbursement for a substantial portion of any future losses under the terms of the FDIC loss sharing agreement. We account for PCI loans under ASC 310-30, Loa ns and Debt Securities Acquired with Deteriorated Credit Quality (“acquired impaired loan accounting”) when (i) we acquire loans deemed to be impaired when there is evidence of credit deterioration since their origination and it is probable at the date of acquisition that we would be unable to collect all contractually required payments and (ii) as a general policy election for non-impaired loans that we acquire in a distressed bank acquisition. Acquired impaired loans are accounted for individually or in pools of loans based on common risk characteristics. The excess of the loan’s or pool’s scheduled contractual principal and interest payments over all cash flows expected at acquisition is the nonaccretable difference. The remaining amount, representing the excess of the loan’s cash flows expected to be collected over the fair value is the accretable yield (accreted into interest income over the remaining life of the loan or pool). Refer to Note 6 — Acquired SJB Assets and FDIC Loss Sharing Asset for PCI loans by type at December 31, 2018. Provision for loan losses on the PCI portfolio will be recorded if there is deterioration in the expected cash flows on PCI loans as a result of deteriorated credit quality. Assumptions utilized in this process include projections related to probability of default, loss severity, prepayment and recovery lag. Decreases in expected cash flows on the acquired impaired loans as of the measurement date compared to previously estimated are recognized by recording a provision for loan losses on acquired impaired loans. Loans accounted for as part of a pool are measured based on the expected cash flows of the entire pool. Other Real Estate Owned Premises and Equipment — Premises and equipment are stated at cost, less accumulated depreciation, which is provided for in amounts sufficient to relate the cost of depreciable assets to operations over the estimated service lives of the respective asset and are computed on a straight-line basis. The ranges of useful lives of the principal classes of assets are as follows: Bank premises 15 - 39 years Leasehold improvements Shorter of estimated economic lives of 15 years or term of the lease. Computer equipment 3 - 7 years Furniture, fixtures and equipment 5 - 10 years Long-lived assets are reviewed periodically for impairment when events or changes in circumstances indicate that the carrying amount may not be recoverable. The existence of impairment is based on undiscounted cash flows. To the extent impairment exists, the impairment is calculated as the difference in fair value of assets and their carrying value. The impairment loss, if any, would be recorded in noninterest expense. Long-lived assets classified as held-for-sale are measured at the lower of its carrying amount or fair value less cost to sell. Assets-held-for sale include long-lived assets transferred from our “held-and-used” portfolio in the period in which the following criteria are met: • Management, having the authority to approve the action, commits to a plan to sell the asset; • The asset is available for immediate sale, an active program to locate a buyer and other actions required to complete the plan to sell the asset have been initiated; • The sale of the asset is probable, and transfer of the asset is expected to qualify for recognition as a completed sale, within one year; • The asset is being actively marketed for sale at a price that is reasonable in relation to its current fair value; • Actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. Goodwill and Intangible Assets — Goodwill resulting from business combinations prior to January 1, 2009, represents the excess of the purchase price over the fair value of the net assets of the businesses acquired. Goodwill resulting from business combinations after January 1, 2009, is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any non-controlling interest in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but is tested for impairment at least annually, or more frequently, if events and circumstances exist that indicate that a goodwill impairment test should be performed. Intangible assets with definite useful lives are amortized over their estimated useful lives to their estimated residual values. Goodwill is the only intangible asset with an indefinite life on our balance sheets. Based on the Company’s annual impairment test, there was zero recorded impairment as of December 31, 2018. Other intangible assets consist of core deposit intangible assets arising from business combinations and are amortized using an accelerated method over their estimated useful lives. Use of Fair Value — We use fair value measurements to record fair value adjustments to certain financial instruments and to determine fair value disclosures. Investment securities available-for-sale and interest-rate swaps are financial instruments recorded at fair value on a recurring basis. Additionally, from time to time, we may be required to record at fair value other assets on a non-recurring basis, such as impaired loans and OREO. These non-recurring fair value adjustments typically involve application of lower-of-cost-or-market accounting or write-downs of individual assets. Further, we include in Note 20 — Fair Value Information of the consolidated financial statements information about the extent to which fair value is used to measure assets and liabilities, the valuation methodologies used and its impact to earnings. Additionally, for financial instruments not recorded at fair value we disclose the estimate of their fair value. Bank Owned Life Insurance — The Company invests in Bank Owned Life Insurance (“BOLI”). BOLI involves the purchasing of life insurance by the Company on a select group of employees. The Company is the owner and primary beneficiary of these policies. BOLI is recorded as an asset at the cash surrender value. Increases in the cash value of these policies, as well as insurance proceeds received, are recorded in other noninterest income and are not subject to income tax for as long as they are held for the life of the covered employee. Income Taxes — Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for t

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Business Combinations	4. BUSINESS COMBINATIONS Community Bank Acquisition On August 10, 2018, the Company completed the acquisition of CB, headquartered in Pasadena, California. The Company acquired all of the assets and assumed all of the liabilities of CB for $180.7 million in cash and $722.8 million in stock. As a result, CB was merged with the Bank, the principal subsidiary of CVB. The primary reason for the acquisition was to further strengthen the Company’s presence in Southern California. At close, CB had 16 banking centers located throughout the greater Los Angeles and . The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. The assets and liabilities, both tangible and intangible, were recorded at their estimated fair values as of the August 10, 2018 acquisition date. These fair values are estimates and are subject to adjustment for up to one year after the acquisition date or when additional information relative to the closing date fair values becomes available and such information is considered final, whichever is earlier. As the initial estimate of fair value of impaired loans was incomplete as of December 31, 2018, the fair value reflected in the financial statements has been determined provisionally. The application of the acquisition method of accounting resulted in the recognition of goodwill of $ 550.0 million and a core deposit intangible (“CDI”) of $52.2 million, or 2.26% of core deposits. Goodwill represents the excess purchase price over the fair value of the net assets acquired. Goodwill is not deductible for income tax purposes. The table below summarizes the amounts recognized for the estimated fair value of assets acquired and the liabilities assumed as of the acquisition date. August 10, 2018 (Dollars in thousands) Merger Consideration Cash paid $ 180,719 CVBF common stock issued 722,767 Total merger consideration $ 903,486 Identifiable net assets acquired, at fair value Assets Acquired Cash and cash equivalents 47,802 Investment securities 716,996 FHLB stock 17,250 Loans 2,734,081 Accrued interest receivable 7,916 Premises and equipment 14,632 BOLI 70,904 Core deposit intangible 52,200 Other assets 54,479 Total assets acquired 3,716,260 Liabilities assumed Deposits 2,869,986 FHLB advances 297,571 Other borrowings 166,000 Other liabilities 29,192 Total liabilities assumed 3,362,749 Total fair value of identifiable net assets, at fair value 353,511 Goodwill $ 549,975 At the date of acquisition, the gross contractual amounts receivable, inclusive of all principal and interest, was approximately $3 billion. The Company’s best estimate of the contractual principal cash flows for loans not expected to be collected at the date of acquisition was approximately $4.5 million. We have included the financial results of the business combination in the condensed consolidated statement of earnings and comprehensive income beginning on the acquisition date. For the year ended December 31, 2018, the Company incurred merger related expenses associated with the CB acquisition of $ 16.4 For illustrative purposes only, the following table presents certain unaudited pro forma information for the years ended December 31, 2018 and 2017. This unaudited estimated pro forma financial information was calculated as if CB had been acquired as of the beginning of the year prior to the date of acquisition. This unaudited pro forma information combines the historical results of CB with the Company’s consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the acquisition occurred as of the beginning of the year prior to the acquisition. The unaudited pro forma information does not consider any changes to the provision for credit losses resulting from recording loan assets at fair value, cost savings, or business synergies. As a result, actual amounts would have differed from the unaudited pro forma information presented. Unaudited Pro Forma Year Ended December 31, 2018 2017 (Dollars in thousands, except per share amounts) Total revenues (net interest income plus noninterest income) $ 488,620 $ 477,235 Net Income $ 181,433 $ 139,129 Earnings per share - basic $ 1.30 $ 1.00 Earnings per share - diluted $ 1.29 $ 0.99 Valley Commerce Bancorp Acquisition On March 10, 2017, the Company completed the acquisition of , the holding company for VBB, headquartered in the Central Valley area of California. The Company acquired all of the assets and assumed all of the liabilities of for $ million in cash and $ million in stock. As a result, VBB was merged with the Bank, the principal subsidiary of CVB. The Company believes this transaction serves to further strengthen its presence in the Central Valley area of California. At close, VBB had four branches located in Visalia, , Fresno, and Woodlake. The systems integration of and CBB was completed in May 2017. Three of these center locations were consolidated with nearby CBB locations in the third quarter of 2017 and the Company sold the Woodlake branch in the fourth quarter of 2017. Goodwill of $27.0 million from the acquisition represents the excess of the purchase price over the fair value of the net tangible and intangible assets acquired. The total fair value of assets acquired approximated $405.9 million, which included $28.3 million in cash and cash equivalents net of cash paid, $2.0 million in FHLB stock, $309.7 million in loans and lease finance receivables, $5.3 million in fixed assets, $9.4 million in Bank Owned Life Insurance (“BOLI”), $3.2 million in core deposit intangible assets acquired and $21.0 million in other assets. The total fair value of liabilities assumed was $368.3 million, which included $361.8 million in deposits, and $6.5 million in other liabilities. The assets and liabilities, both tangible and intangible, were recorded at their estimated fair values as of March 10, 2017. The assets acquired and liabilities assumed have been accounted for under the acquisition method accounting. The purchase price allocation was finalized in the third quarter of 2017. We have included the financial results of the business combination in the condensed consolidated statement of earnings and comprehensive income beginning on the acquisition date. For the year ended December 31, 2018, the Company did not incur any merger related expenses associated with the VCBP acquisition, compared to $ 2.1 . County Commerce Bank Acquisition On February 29, 2016, the Bank acquired all of the assets and assumed all of the liabilities of CCB for $ million in cash and $ million in stock. As a result, CCB was merged with the Bank, the principal subsidiary of CVB. The Company believes this transaction serves to further expand its footprint northward into and along the central coast of California. At close, CCB had four branches located in Ventura, Oxnard, Camarillo, and Westlake Village. Goodwill of $15.3 million from the acquisition represents the excess of the purchase price over the fair value of the net tangible and intangible assets acquired. The total fair value of assets acquired approximated $252.4 million, which included $54.8 million in cash and balances due from depository institutions net of cash paid, $1.5 million in FHLB stock, $168.0 million in loans and lease finance receivables, $8.6 million in fixed assets, $3.9 million in core deposit intangible assets acquired and $289,000 in other assets. The total fair value of liabilities assumed was $230.8 million, which included $224.2 million in deposits, $5.0 million in FHLB advances and $1.6 million in other liabilities. The assets and liabilities, both tangible and intangible, were recorded at their estimated fair values as of February 29, 2016. The assets acquired and liabilities assumed have been accounted for under the acquisition method accounting. The purchase price allocation was finalized in the fourth quarter of 2016. We have included the financial results of the business combination in the condensed consolidated statement of earnings and comprehensive income beginning on the acquisition date. For the year ended December 31, 2018, the Company did not incur any merger related expenses associated with the CCB acquisition, compared to $ 145,000 .

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Investment Securities	5. INVESTMENT SECURITIES The amortized cost and estimated fair value of investment securities are summarized below. The majority of securities held are available-for-sale securities with fair value based on quoted prices for similar assets in active markets or quoted prices for identical assets in markets that are not active. Estimated fair values were obtained from an independent pricing service based upon market quotes. December 31, 2018 Amortized Cost Gross Unrealized Holding Gain Gross Unrealized Holding Loss Fair Value Total Percent (Dollars in thousands) Investment securities available-for-sale: Residential mortgage-backed securities $ 1,494,106 $ 1,348 $ (20,946 ) $ 1,474,508 85.03 % CMO/REMIC - residential 217,223 353 (3,525 ) 214,051 12.34 % Municipal bonds 45,621 332 (1,143 ) 44,810 2.59 % Other securities 716 - - 716 0.04 % Total available-for-sale securities $ 1,757,666 $ 2,033 $ (25,614 ) $ 1,734,085 100.00 % Investment securities held-to-maturity: Government agency/GSE $ 138,274 $ 572 $ (2,622 ) $ 136,224 18.57 % Residential mortgage-backed securities 153,874 - (3,140 ) 150,734 20.67 % CMO 215,336 - (12,081 ) 203,255 28.93 % Municipal bonds 236,956 556 (6,188 ) 231,324 31.83 % Total held-to-maturity securities $ 744,440 $ 1,128 $ (24,031 ) $ 721,537 100.00 % December 31, 2017 Amortized Cost Gross Unrealized Holding Gain Gross Unrealized Holding Loss Fair Value Total Percent (Dollars in thousands) Investment securities available-for-sale: Residential mortgage-backed securities $ 1,747,780 $ 11,231 $ (8,102 ) $ 1,750,909 84.14 % CMO/REMIC - residential 274,634 1,277 (2,082 ) 273,829 13.16 % Municipal bonds 54,966 774 (244 ) 55,496 2.66 % Other securities 751 - - 751 0.04 % Total available-for-sale securities $ 2,078,131 $ 13,282 $ (10,428 ) $ 2,080,985 100.00 % Investment securities held-to-maturity: Government agency/GSE $ 159,716 $ 854 $ (2,134 ) $ 158,436 19.25 % Residential mortgage-backed securities 176,427 667 (382 ) 176,712 21.26 % CMO 225,072 - (8,641 ) 216,431 27.12 % Municipal bonds 268,675 2,751 (3,790 ) 267,636 32.37 % Total held-to-maturity securities $ 829,890 $ 4,272 $ (14,947 ) $ 819,215 100.00 % 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. For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Investment securities available-for-sale: Taxable $ 44,423 $ 47,596 $ 43,538 Tax-advantaged 1,565 2,182 4,164 Total interest income from available-for-sale securities 45,988 49,778 47,702 Investment securities held-to-maturity: Taxable 11,848 12,558 10,183 Tax-advantaged 7,053 8,457 10,044 Total interest income from held-to-maturity securities 18,901 21,015 20,227 Total interest income from investment securities $ 64,889 $ 70,793 $ 67,929 Approximately 89% of the total investment securities portfolio at December 31, 2018 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 tables below show 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, 2018 and 2017. Management has reviewed individual securities to determine whether a decline in fair value below the amortized cost basis is other-than-temporary. The unrealized losses on these securities were primarily attributed to changes in interest rates. The issuers of these securities have not, to our knowledge, evidenced any cause for default on these securities. These securities have fluctuated in value since their purchase dates as market rates have fluctuated. However, we have the ability and the intention to hold these securities until their fair values recover to cost or maturity. As such, management does not deem these securities to be OTTI. December 31, 2018 Less Than 12 Months 12 Months or Longer Total Fair Value Gross Unrealized Holding Losses Fair Value Gross Unrealized Holding Losses Fair Value Gross Unrealized Holding Losses (Dollars in thousands) Investment securities available-for-sale: Residential mortgage-backed securities $ 692,311 $ (4,864 ) $ 593,367 $ (16,082 ) $ 1,285,678 $ (20,946 ) CMO/REMIC - residential 36,582 (365 ) 135,062 (3,160 ) 171,644 (3,525 ) Municipal bonds 9,568 (188 ) 14,181 (955 ) 23,749 (1,143 ) Total available-for-sale securities $ 738,461 $ (5,417 ) $ 742,610 $ (20,197 ) $ 1,481,071 $ (25,614 ) Investment securities held-to-maturity: Government agency/GSE $ 7,479 $ (15 ) $ 54,944 $ (2,607 ) $ 62,423 $ (2,622 ) Residential mortgage-backed securities 59,871 (484 ) 90,863 (2,656 ) 150,734 (3,140 ) CMO - - 203,254 (12,081 ) 203,254 (12,081 ) Municipal bonds 70,989 (778 ) 77,723 (5,410 ) 148,712 (6,188 ) Total held-to-maturity securities $ 138,339 $ (1,277 ) $ 426,784 $ (22,754 ) $ 565,123 $ (24,031 ) December 31, 2017 Less Than 12 Months 12 Months or Longer Total Fair Value Gross Unrealized Holding Losses Fair Value Gross Unrealized Holding Losses Fair Value Gross Unrealized Holding Losses (Dollars in thousands) Investment securities available-for-sale: Residential mortgage-backed securities $ 414,091 $ (1,828 ) $ 303,746 $ (6,274 ) $ 717,837 $ (8,102 ) CMO/REMIC - residential 95,137 (487 ) 71,223 (1,595 ) 166,360 (2,082 ) Municipal bonds 946 (4 ) 13,956 (240 ) 14,902 (244 ) Total available-for-sale securities $ 510,174 $ (2,319 ) $ 388,925 $ (8,109 ) $ 899,099 $ (10,428 ) Investment securities held-to-maturity: Government agency/GSE $ 18,950 $ (27 ) $ 43,495 $ (2,107 ) $ 62,445 $ (2,134 ) Residential mortgage-backed securities 51,297 (188 ) 55,306 (194 ) 106,603 (382 ) CMO - - 216,431 (8,641 ) 216,431 (8,641 ) Municipal bonds 32,069 (492 ) 66,217 (3,298 ) 98,286 (3,790 ) Total held-to-maturity securities $ 102,316 $ (707 ) $ 381,449 $ (14,240 ) $ 483,765 $ (14,947 ) The following summarizes our analysis of these securities and the unrealized losses. This assessment was based on the following factors: i) the length of the time and the extent to which the fair value has been less than amortized cost; ii) adverse condition specifically related to the security, an industry, or a geographic area and whether or not the Company expects to recover the entire amortized cost, iii) historical and implied volatility of the fair value of the security; iv) the payment structure of the security and the likelihood of the issuer being able to make payments in the future; v) failure of the issuer of the security to make scheduled interest or principal payments, vi) any changes to the rating of the security by a rating agency, and vii) recoveries or additional declines in fair value subsequent to the balance sheet date. Government Agency & Government-Sponsored Enterprise (“GSE”) — The government agency bonds are backed by the full faith and credit of agencies of the U.S. Government. While the Government-Sponsored Enterprise bonds are not expressly guaranteed by the U.S. Government, they are currently being supported by the U.S. Government under a conservatorship arrangement. As of December 31, 2018, approximately $89.7 million in U.S. government agency bonds were callable. These securities are bullet securities, that is, they have a defined maturity date on which the principal is paid. The contractual term of these investments provides that the Company will receive the face value of the bond at maturity which will equal the amortized cost of the bond. Interest is received throughout the life of the security. Accordingly, it is expected that the securities would not be settled at a price less than the amortized cost of the bonds. Mortgage-Backed Securities (“MBS”) and CMO/REMIC — Most of the Company’s mortgage-backed and CMO/REMIC securities are issued by Government Agencies or Government-Sponsored Enterprises such as Ginnie Mae, Fannie Mae and Freddie Mac. These securities are collateralized or backed by the underlying residential or commercial mortgages. All mortgage-backed securities are considered to be rated investment grade with a weighted average life of approximately 3.9 years. Of the total MBS/CMO, 100.00% have the implied guarantee of U.S. Government-Sponsored Agencies and Enterprises. Accordingly, it is expected that the securities would not be settled at a price less than the amortized cost of the bonds. There were no credit-related OTTI recognized in earnings for the years ended December 31, 2018 and 2017. Municipal Bonds — The majority of the Company’s municipal bonds, with maturities of approximately 9.6 t At December 31, 2018 and 2017, investment securities having a carrying value of approximately $1.66 billion and $1.91 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 December 31, 2018, by contractual maturity, are shown in the table below. Although mortgage-backed securities and CMO/REMIC have contractual maturities through 2057, expected maturities will differ from contractual maturities because borrowers may have the right to prepay such obligations without penalty. Mortgage-backed and CMO/REMIC securities are included in maturity categories based upon estimated average lives which incorporate estimated prepayment speeds. December 31, 2018 Available-for-sale Held-to-maturity Amortized Cost Fair Value Amortized Cost Fair Value (Dollars in thousands) Due in one year or less $ 13,907 $ 14,069 $ 500 $ 508 Due after one year through five years 1,574,638 1,554,686 288,967 276,693 Due after five years through ten years 143,258 140,500 197,061 193,389 Due after ten years 25,863 24,830 257,912 250,947 Total investment securities $ 1,757,666 $ 1,734,085 $ 744,440 $ 721,537 The investment in stock is periodically evaluated for impairment based on, among other things, the capital adequacy of the and its overall financial condition. No impairment losses have been recorded through December 31 , 2018 .

Acquired SJB Assets and FDIC Lo

Acquired SJB Assets and FDIC Loss Sharing Asset	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Acquired SJB Assets and FDIC Loss Sharing Asset	6. ACQUIRED SJB ASSETS AND FDIC LOSS SHARING ASSET FDIC Assisted Acquisition On October 16, 2009, the Bank acquired SJB and entered into a loss sharing agreements with the FDIC that is more fully discussed in Note 3 — Summary of Significant Accounting Policies At December 31, 2018, the remaining discount associated with the PCI loans was zero. The loss sharing agreement for commercial loans expired October 16, 2014. The loss sharing agreement with FDIC for single-family residential loans, which would have expired on October 16, 2019, was terminated by the Bank on July 20, 2018. The following table provides a summary of PCI loans and lease finance receivables by type and by internal risk ratings (credit quality indicators) for the periods presented. December 31 2018 2017 (Dollars in thousands) Commercial and industrial $ 519 $ 934 SBA 1,258 1,383 Real estate: Commercial real estate 14,407 27,431 Construction - - SFR mortgage 145 162 Dairy & livestock and agribusiness 700 770 Municipal lease finance receivables - - Consumer and other loans 185 228 Gross PCI loans 17,214 30,908 Less: Purchase accounting discount - (2,026 ) Gross PCI loans, net of discount 17,214 28,882 Less: Allowance for PCI loan losses (204 ) (367 ) Net PCI loans $ 17,010 $ 28,515 Credit Quality Indicators The following table summarizes gross PCI loans by internal risk ratings for the periods presented. December 31, 2018 2017 (Dollars in thousands) Pass $ 15,816 $ 26,439 Special mention 1,174 1,088 Substandard 224 3,381 Doubtful & loss - - Total gross PCI loans $ 17,214 $ 30,908 FDIC Loss Sharing Liability The following table summarizes the activity related to the FDIC loss sharing liability for the periods presented. For the Year Ended December 31, 2018 2017 (Dollars in thousands) Balance, beginning of period $ (107 ) $ (502 ) FDIC share of recoveries, net of charge-offs - - Cash paid to FDIC, net 64 519 Other 43 (124 ) Balance, end of period $ - $ (107 ) Through December 31, 2018, the Bank has submitted claims to the FDIC for net losses on PCI loans totaling $ milli on.

Loans and Lease Finance Receiva

Loans and Lease Finance Receivables and Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Loans and Lease Finance Receivables and Allowance for Loan Losses	7. LOANS AND LEASE FINANCE RECEIVABLES AND ALLOWANCE FOR LOAN LOSSES The following table provides a summary of total loans and lease finance receivables, excluding PCI loans, by type. December 31 2018 2017 (Dollars in thousands) Commercial and industrial $ 1,002,209 $ 513,325 SBA 350,043 122,055 Real estate: Commercial real estate 5,394,229 3,376,713 Construction 122,782 77,982 SFR mortgage 296,504 236,202 Dairy & livestock and agribusiness 393,843 347,289 Municipal lease finance receivables 64,186 70,243 Consumer and other loans 128,429 64,229 Gross loans, excluding PCI loans 7,752,225 4,808,038 Less: Deferred loan fees, net (4,828 ) (6,289 ) Gross loans, excluding PCI loans, net of deferred loan fees 7,747,397 4,801,749 Less: Allowance for loan losses (63,409 ) (59,218 ) Net loans, excluding PCI loans 7,683,988 4,742,531 PCI Loans 17,214 30,908 Discount on PCI loans - (2,026 ) Less: Allowance for loan losses (204 ) (367 ) PCI loans, net 17,010 28,515 Total loans and lease finance receivables $ 7,700,998 $ 4,771,046 As of December 31, 2018, 74.99% of the total gross loan portfolio (excluding PCI loans) consisted of real estate loans, 69.58% of which consisted of commercial real estate loans. Substantially all of the Company’s real estate loans and construction loans are secured by real properties located in California. As of December 31, 2018, $229.8 million, or 4.26% of the total commercial real estate loans included loans secured by farmland, compared to $206.1 million, or 6.10%, at December 31, 2017. The loans secured by farmland included $126.9 million for loans secured by dairy & livestock land and $102.9 million for loans secured by agricultural land at December 31, 2018, compared to $118.2 million for loans secured by dairy & livestock land and $87.9 million for loans secured by agricultural land at December 31, 2017. As of December 31, 2018, dairy & livestock and agribusiness loans of $393.8 million were comprised of $340.5 million for dairy & livestock loans and $53.3 million for agribusiness loans, compared to $310.6 million for dairy & livestock loans and $36.7 million for agribusiness loans at December 31, 2017. At December 31, 2018, the Company held approximately $3.77 billion of total fixed rate loans, including PCI loans. At December 31, 2018 and 2017, loans totaling $5.71 billion and $3.68 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 as of December 31, 2018 and 2017. 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. Credits are monitored by line and credit management personnel for deterioration or improvement in a borrower’s financial condition, which would impact the ability of the borrower to perform under the contract. Risk ratings are adjusted as necessary . Loans are risk rated into the following categories (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, excluding PCI loans, according to our internal risk ratings for the periods presented. December 31, 2018 Pass Special Mention Substandard (1) Doubtful & Loss Total (Dollars in thousands) Commercial and industrial $ 961,909 $ 29,358 $ 10,942 $ - $ 1,002,209 SBA 336,033 7,375 6,635 - 350,043 Real estate: Commercial real estate Owner occupied 2,008,169 95,841 13,980 - 2,117,990 Non-owner occupied 3,260,822 9,938 5,479 - 3,276,239 Construction Speculative 118,233 - - - 118,233 Non-speculative 4,549 - - - 4,549 SFR mortgage 289,607 3,310 3,587 - 296,504 Dairy & livestock and agribusiness 350,044 34,586 9,213 - 393,843 Municipal lease finance receivables 63,650 536 - - 64,186 Consumer and other loans 126,085 1,263 1,081 - 128,429 Total gross loans, excluding PCI loans $ 7,519,101 $ 182,207 $ 50,917 $ - $ 7,752,225 (1) Includes $ 19.0 million of classified loans acquired from CB in the third quarter of 2018 . December 31, 2017 Pass Special Mention Substandard Doubtful & Loss Total (Dollars in thousands) Commercial and industrial $ 483,641 $ 19,566 $ 10,118 $ - $ 513,325 SBA 112,835 5,358 3,862 - 122,055 Real estate: Commercial real estate Owner occupied 1,009,199 76,111 10,970 - 1,096,280 Non-owner occupied 2,257,130 16,434 6,869 - 2,280,433 Construction Speculative 60,042 - - - 60,042 Non-speculative 17,940 - - - 17,940 SFR mortgage 229,032 3,124 4,046 - 236,202 Dairy & livestock and agribusiness 321,413 9,047 16,829 - 347,289 Municipal lease finance receivables 69,644 599 - - 70,243 Consumer and other loans 61,715 1,255 1,259 - 64,229 Total gross loans, excluding PCI loans $ 4,622,591 $ 131,494 $ 53,953 $ - $ 4,808,038 Allowance for Loan Losses The Bank’s Audit and Director Loan Committees provide Board oversight of the ALLL process and approve the ALLL methodology on a quarterly basis. Our methodology for assessing the appropriateness of the allowance is conducted on a regular basis and considers the Bank’s overall loan portfolio. Refer to Note 3 — Summary of Significant Accounting Policies for a more detailed discussion concerning the allowance for loan losses. Management believes that the ALLL was appropriate at December 31, 2018 and 2017. No assurance can be given that economic conditions which adversely affect the Company’s service areas or other circumstances will not be reflected in increased provisions for loan losses in the future. The following tables present the balance and activity related to the allowance for loan losses for held-for-investment loans by type for the periods presented. For the Year Ended December 31, 2018 Ending Balance December 31, 2017 Charge-offs Recoveries Provision for (Recapture of) Loan Losses Ending Balance December 31, 2018 (Dollars in thousands) Commercial and industrial $ 7,280 $ (10 ) $ 82 $ 168 $ 7,520 SBA 869 (257 ) 20 430 1,062 Real estate: Commercial real estate 41,722 - - 3,212 44,934 Construction 984 - 2,506 (2,509 ) 981 SFR mortgage 2,112 (13 ) 51 46 2,196 Dairy & livestock and agribusiness 4,647 - 19 549 5,215 Municipal lease finance receivables 851 - - (76 ) 775 Consumer and other loans 753 (11 ) 141 (157 ) 726 PCI loans 367 - - (163 ) 204 Total allowance for loan losses $ 59,585 $ (291 ) $ 2,819 $ 1,500 $ 63,613 For the Year Ended December 31, 2017 Ending Balance December 31, 2016 Charge-offs Recoveries (Recapture of) Provision for Loan Losses Ending Balance December 31, 2017 (Dollars in thousands) Commercial and industrial $ 8,154 $ (138 ) $ 118 $ (854 ) $ 7,280 SBA 871 - 78 (80 ) 869 Real estate: Commercial real estate 37,443 - 154 4,125 41,722 Construction 1,096 - 6,036 (6,148 ) 984 SFR mortgage 2,287 - 212 (387 ) 2,112 Dairy & livestock and agribusiness 8,541 - 19 (3,913 ) 4,647 Municipal lease finance receivables 941 - - (90 ) 851 Consumer and other loans 988 (13 ) 79 (301 ) 753 PCI loans 1,219 - - (852 ) 367 Total allowance for loan losses $ 61,540 $ (151 ) $ 6,696 $ (8,500 ) $ 59,585 For the Y ear Ended December 31, 2016 Ending Balance Charge-offs Recoveries (Recapture Ending Balance (Dollars in thousands) Commercial and industrial $ 8,588 $ (120 ) $ 630 $ (944 ) $ 8,154 SBA 993 — 40 (162 ) 871 Real estate: Commercial real estate 36,995 — 792 (344 ) 37,443 Construction 2,389 — 7,174 (8,467 ) 1,096 SFR mortgage 2,103 (102 ) — 286 2,287 Dairy & livestock and agribusiness 6,029 — 216 2,296 8,541 Municipal lease finance receivables 1,153 — — (212 ) 941 Consumer and other loans 906 (16 ) 170 (72 ) 988 PCI loans — — — 1,219 1,219 Total allowance for loan losses $ 59,156 $ (238 ) $ 9,022 $ (6,400 ) $ 61,540 The following tables present the recorded investment in loans held-for-investment and the related allowance for loan losses by loan type, based on the Company’s methodology for determining the allowance for loan losses for the periods presented. Acquired loans are also supported by a credit discount established through the determination of fair value for the acquired loan portfolio. December 31, 2018 Recorded Investment in Loans Allowance for Loan Losses Individually Collectively Acquired with Deterioriated Credit Quality Individually Collectively Acquired with Deterioriated Credit Quality (Dollars in thousands) Commercial and industrial $ 7,625 $ 994,584 $ — $ 3 $ 7,517 $ — SBA 3,467 346,576 — — 1,062 — Real estate: Commercial real estate 6,540 5,387,689 — 478 44,456 — Construction — 122,782 — — 981 — SFR mortgage 5,349 291,155 — — 2,196 — Dairy & livestock and agribusiness 78 393,765 — 12 5,203 — Municipal lease finance receivables — 64,186 — — 775 — Consumer and other loans 486 127,943 — 68 658 — PCI loans — — 17,214 — — 204 Total $ 23,545 $ 7,728,680 $ 17,214 $ 561 $ 62,848 $ 204 December 31, 2017 Recorded Investment in Loans Allowance for Loan Losses Individually Collectively Acquired with Deterioriated Credit Quality Individually Collectively Acquired with Deterioriated Credit Quality (Dollars in thousands) Commercial and industrial $ 440 $ 512,885 $ — $ — $ 7,280 $ — SBA 1,531 120,524 — 1 868 — Real estate: Commercial real estate 8,133 3,368,580 — — 41,722 — Construction — 77,982 — — 984 — SFR mortgage 4,040 232,162 — — 2,112 — Dairy & livestock and agribusiness 829 346,460 — — 4,647 — Municipal lease finance receivables — 70,243 — — 851 — Consumer and other loans 552 63,677 — 74 679 — PCI loans — — 28,882 — — 367 Total $ 15,525 $ 4,792,513 $ 28,882 $ 75 $ 59,143 $ 367 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 allowance, 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 A loan is reported as a TDR when the Bank grants a concession(s) to a borrower experiencing financial difficulties that the Bank would not otherwise consider. Examples of such concessions include a reduction in the interest rate, deferral of principal or accrued interest, extending the payment due dates or loan maturity date(s), or providing a lower interest rate than would be normally available for new debt of similar risk. As a result of these concessions, restructured loans are classified as impaired. Impairment reserves on non-collateral dependent restructured loans are measured by comparing the present value of expected future cash flows on the restructured loans discounted at the interest rate of the original loan agreement to the carrying value . These impairment reserves are recognized as a specific component to be provided for in the allowance for loan losses. Generally, when loans are identified as impaired they are moved to our Special Assets Department. When we identify a loan as impaired, we measure the loan for potential impairment using discounted cash flows, unless the loan is determined to be collateral dependent. In these cases, we use the current fair value of collateral, less selling costs. Generally, the determination of fair value is established through obtaining external appraisals of the collateral. The following tables present the recorded investment in, and the aging of, past due and nonaccrual loans, excluding PCI loans, by type of loans for the periods presented. December 31, 2018 30-59 60 - 89 Total Past Due Nonaccrual (1) (3) Current Total Loans (Dollars in thousands) Commercial and industrial $ 820 $ 89 $ 909 $ 7,490 $ 993,810 $ 1,002,209 SBA 1,172 135 1,307 2,892 345,844 350,043 Real estate: Commercial real estate Owner occupied 2,439 350 2,789 589 2,114,612 2,117,990 Non-owner occupied — — — 5,479 3,270,760 3,276,239 Construction Speculative (2) — — — — 118,233 118,233 Non-speculative — — — — 4,549 4,549 SFR mortgage — 285 285 2,937 293,282 296,504 Dairy & livestock and agribusiness — — — 78 393,765 393,843 Municipal lease finance receivables — — — — 64,186 64,186 Consumer and other loans — — — 486 127,943 128,429 Total gross loans, excluding PCI loans $ 4,431 $ 859 $ 5,290 $ 19,951 $ 7,726,984 $ 7,752,225 (1) As of December 31, 2018, $2.3 million of nonaccruing loans were current, $33,000 were 30-59 days past due, $57,000 were 60-89 days past due and $17.6 million were 90+ days past due. (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. (3) Includes $12.3 million of nonaccrual loans acquired from CB in the third quarter of 2018. December 31, 2017 30-59 60-89 Total Past Nonaccrual Current Total Loans (Dollars in thousands) Commercial and industrial $ 768 $ — $ 768 $ 250 $ 512,307 $ 513,325 SBA 403 — 403 906 120,746 122,055 Real estate: Commercial real estate Owner occupied — — — 4,365 1,091,915 1,096,280 Non-owner occupied — — — 2,477 2,277,956 2,280,433 Construction Speculative (2) — — — — 60,042 60,042 Non-speculative — — — — 17,940 17,940 SFR mortgage — — — 1,337 234,865 236,202 Dairy & livestock and agribusiness — — — 829 346,460 347,289 Municipal lease finance receivables — — — — 70,243 70,243 Consumer and other loans 1 — 1 552 63,676 64,229 Total gross loans, excluding PCI loans $ 1,172 $ — $ 1,172 $ 10,716 $ 4,796,150 $ 4,808,038 (1) As of December 31, 2017, $3.6 million of nonaccruing loans were current, $ 376 (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. Impaired Loans At December 31, 2018, the Company had impaired loans, excluding PCI loans, of $23.5 million and included $12.3 million of loans acquired from CB in the third quarter of 2018. Impaired loans included $7.5 million of nonaccrual commercial and industrial loans, $6.1 million of nonaccrual SFR mortgage loans, $2.9 million of nonaccrual SBA loans, $486,000 of nonaccrual dairy & livestock and agribusiness loans. These impaired loans included $7.1 million of loans whose terms were modified in a troubled debt restructuring, of which $3.5 million are classified as nonaccrual. The remaining balance of $3.6 million consisted of 13 loans performing according to the restructured terms. The impaired loans had a specific allowance of $561,000 at December 31, 2018. At December 31, 2017, the Company had classified as impaired, loans, excluding PCI loans, with a balance of $15.5 million with a related allowance of $75,000. The following tables present information for held-for-investment loans, excluding PCI loans, individually evaluated for impairment by type of loans, as and for the periods presented. As of and For the Year Ended December 31, 2018 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 7,436 $ 11,457 $ — $ 7,718 $ 7 SBA 3,467 5,746 — 3,919 44 Real estate: Commercial real estate Owner occupied 589 705 — 624 — Non-owner occupied 2,808 4,324 — 4,585 32 Construction Speculative — — — — — Non-speculative — — — — — SFR mortgage 5,349 6,270 — 5,484 80 Dairy & livestock and agribusiness — — — — — Municipal lease finance receivables — — — — — Consumer and other loans 418 526 — 459 — Total 20,067 29,028 — 22,789 163 With a related allowance recorded: Commercial and industrial 189 191 3 203 — SBA — — — — — Real estate: Commercial real estate Owner occupied — — — — — Non-owner occupied 3,143 3,144 478 3,144 — Construction Speculative — — — — — Non-speculative — — — — — SFR mortgage — — — — — Dairy & livestock and agribusiness 78 78 12 78 — Municipal lease finance receivables — — — — — Consumer and other loans 68 100 68 76 — Total 3,478 3,513 561 3,501 — Total impaired loans $ 23,545 $ 32,541 $ 561 $ 26,290 $ 163 As of and For the Year Ended December 31, 2017 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 440 $ 980 $ — $ 548 $ 10 SBA 1,530 1,699 — 1,598 47 Real estate: Commercial real estate Owner occupied 4,365 4,763 — 4,414 36 Non-owner occupied 3,768 5,107 — 3,951 94 Construction Speculative — — — — — Non-speculative — — — — — SFR mortgage 4,040 4,692 — 4,119 118 Dairy & livestock and agribusiness 829 1,091 — 988 1 Municipal lease finance receivables — — — — — Consumer and other loans 174 370 — 202 — Total 15,146 18,702 — 15,820 306 With a related allowance recorded: Commercial and industrial — — — — — SBA 1 18 1 6 — 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 378 391 74 385 — Total 379 409 75 391 — Total impaired loans $ 15,525 $ 19,111 $ 75 $ 16,211 $ 306 As of and For the Year Ended December 31, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 730 $ 1,646 $ — $ 832 $ 26 SBA 3,386 4,189 — 3,709 50 Real estate: Commercial real estate Owner occupied 1,797 2,276 — 1,410 70 Non-owner occupied 13,331 15,842 — 13,517 592 Construction Speculative — — — — — Non-speculative — — — — — SFR mortgage 5,174 6,075 — 5,327 135 Dairy & livestock and agribusiness 747 747 — 692 47 Municipal lease finance receivables — — — — — Consumer and other loans 853 1,423 — 919 18 Total 26,018 32,198 — 26,406 938 With a related allowance recorded: Commercial and industrial 171 171 114 233 9 SBA 196 212 27 206 14 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 367 383 141 439 23 Total impaired loans $ 26,385 $ 32,581 $ 141 $ 26,845 $ 961 The Company recognizes the charge-off of the impairment allowance on impaired loans in the period in which a loss is identified for collateral dependent loans. Therefore, the majority of the nonaccrual loans as of December 31, 2018 and 2017 have already been written down to the estimated net realizable value. An allowance is recorded on impaired loans for the following: nonaccrual loans where a charge-off is not yet processed, nonaccrual SFR mortgage loans where there is a potential modification in process, or on smaller balance non-collateral dependent loans. Reserve for Unfunded Loan Commitments The allowance for off-balance sheet credit exposure relates to commitments to extend credit, letters of credit and undisbursed funds on lines of credit. The Company evaluates credit risk associated with the off-balance sheet loan commitments at the same time it evaluates credit risk associated with the loan and lease portfolio. Company recorded a recapture of the reserve for unfunded loan commitments of $250,000 for the year ended December 31, 2018, compared with a recapture of provision for unfunded loan commitments of $400,000 for the year ended December 31, 2017 and a recapture of provision for unfunded loan commitments of $450,000 for the year ended December 31, 2016. As of December 31, 2018 and December 31, 2017, the balance in this reserve was $9.0 million and $6.3 million, respectively, and was included in other liabilities. Troubled Debt Restructurings Loans that are reported as TDRs are considered impaired and charge-off amounts are taken on an individual loan basis, as deemed appropriate. The majority of restructured loans are loans for which the terms of repayment have been renegotiated, resulting in a reduction in interest rate or deferral of principal. Refer to Note 3 — Summary of Significant Accounting Policies, Troubled Debt Restructurings , included herein. As of December 31, 2018, there were $7.1 million of loans classified as a TDR, of which $3.5 million were nonperforming and $3.6 million were performing. TDRs on accrual status are comprised of loans that were accruing interest at the time of restructuring or have demonstrated repayment performance in compliance with the restructured terms for a sustained period and for which the Company anticipates full repayment of both principal and interest. At December 31, 2018, performing TDRs were comprised of nine SFR mortgage loans of $2.4 million, one SBA loan of $575,000, and two commercial and industrial loans of $135,000. 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 allocated $490,000 and $1,000 of specific allowance to TDRs as of December 31, 2018 and December 31, 2017, respectively. The following table provides a summary of the activity related to TDRs for the periods presented. For the Year Ended December 31, 2018 2017 (Dollars in thousands) Performing TDRs: Beginning balance $ 4,809 $ 19,233 New modifications 311 3,143 Payoffs/payments, net and other (1,526 ) (14,752 ) TDRs returned to accrual status - 329 TDRs placed on nonaccrual status - (3,144 ) Ending balance $ 3,594 $ 4,809 Nonperforming TDRs: Beginning balance $ 4,200 $ 1,626 New modifications 316 2,066 Charge-offs - - Payoffs/payments, net and other (1,007 ) (2,307 ) TDRs returned to accrual status - (329 ) TDRs placed on nonaccrual status - 3,144 Ending balance $ 3,509 $ 4,200 Total TDRs $ 7,103 $ 9,009 The following tables summarize loans modified as troubled debt restructurings for the periods presented. Modifications (1) For the Year Ended December 31, 2018 Number Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity 1 38 38 20 - Real estate: Commercial real estate: Owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Non-owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - SFR mortgage: Interest rate reduction - - - - - Change in amortization period or maturity 1 311 311 300 - Dairy & livestock and agribusiness: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity 1 278 278 267 - Total loans 3 $ 627 $ 627 $ 587 $ - For the Year Ended December 31, 2017 Number Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity - - - - - Real estate: Commercial real estate: Owner occupied Interest rate reduction - - - - - Change in amortization period or maturity 1 3,143 3,143 3,143 - Non-owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - SFR mortgage: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Dairy & livestock and agribusiness: Interest rate reduction - - - - - Change in amortization period or maturity 1 1,984 1,984 78 - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Total loans 2 $ 5,127 $ 5,127 $ 3,221 $ - For the Year Ended December 31, 2016 Number Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction 1 $ 112 $ 112 $ 103 $ - Change in amortization period or maturity - - - - - SBA: Interest rate reduction - - - - - Change in amortization period or maturity 2 214 214 196 28 Real estate: Commercial real estate: Owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Non-owner occupied Interest rate reduction 1 759 759 756 - Change in amortization period or maturity - - - - - Dairy & livestock and agribusiness: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - SFR mortgage: Interest rate reduction - - - - - Change in amortization period or maturity 3 201 201 185 - Total loans 7 $ 1,286 $ 1,286 $ 1,240 $ 28 (1) The tables above exclude modified loans that were paid off prior to the end of the period. (2) Financial effects resulting from modifications represent charge-offs and specific allowance recorded at modification date. As of December 31, 2018, there were no loans that were modified as a TDR within the previous 12 months that subsequently defaulted. As of December 31, 2017, there was one commercial real estate loan with an outstanding balance of $3.1 million loans that were previously modified as a troubled debt restructuring within the previous 12 months that subsequently . As of December 31, 2016, there were no loans that were previously modified as a troubled debt restructuring within the previous 12 months that subsequently defaulted during the year ended December 31, 2016 .

Other Real Estate Owned

Other Real Estate Owned	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Other Real Estate Owned	8. OTHER REAL ESTATE OWNED The following table summarizes the activity related to total OREO for the periods presented. For the Year Ended December 31, 2018 2017 (Dollars in thousands) Balance, beginning of period $ 4,527 $ 4,527 Additions 420 — Dispositions (4,527 ) — Valuation adjustments — — Balance, end of period $ 420 $ 4,527

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	9. GOODWILL AND OTHER INTANGIBLE ASSETS The following table presents the changes in the carrying amount of goodwill for the periods presented. As of and for the Year Ended December 31, 2018 2017 (Dollars in thousands) Balance, beginning of period $ 116,564 $ 89,533 Additions due to acquisitions 549,975 27,031 Balance, end of period $ 666,539 $ 116,564 The following summarizes activity of amortizable core deposit intangible (“CDI”) assets for the periods presented. As of and For the Year Ended December 31, 2018 2017 Gross CDI Amount Accumulated Amortization Net CDI Amount Gross CDI Amount Accumulated Amortization Net CDI Amount (Dollars in thousands) Balance of intangible assets, beginning of period $ 41,097 $ (34,259 ) $ 6,838 $ 37,940 $ (32,930 ) $ 5,010 Additions due to acquisitions 52,200 3,157 Balance of intangible assets, end of period $ 93,297 $ (39,513 ) $ 53,784 $ 41,097 $ (34,259 ) $ 6,838 Aggregate amortization expense: For year ended December 31, $ 5,254 $ 1,329 Estimated Amortization Expense: For the year ending December 31, 2019 10,798 For the year ending December 31, 2020 9,352 For the year ending December 31, 2021 8,240 For the year ending December 31, 2022 7,126 Thereafter 18,268 At December 31, 2018 the weighted average remaining life of intangible assets is approximately 3.21 years.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Premises and Equipment	10. PREMISES AND EQUIPMENT Premises and equipment were comprised of the following for the periods presented. As of December 31, 2018 2017 (Dollars in thousands) Land $ 19,929 $ 14,489 Bank premises 73,188 65,215 Furniture and equipment 29,020 25,610 Premises and equipment, gross 122,137 105,314 Accumulated depreciation and amortization (63,944 ) (59,148 ) Premises and equipment, net $ 58,193 $ 46,166 In 2016, a decision was made to relocate our operations and technology center to a new location to allow for future growth. A new location was identified and acquired in 2016 with a plan of relocation in the second quarter of 2017. In conjunction with the purchase of this new building, management pursued a plan to sell the existing building. In accordance with GAAP, this building was transferred from our long-lived asset portfolio to held-for-sale which resulted in an impairment loss of $2.6 million for the year ended December 31, 2016. At December 31, 2016, the fair value, net of selling costs, of this held-for-sale asset was $3.4 million. This asset was sold in the third quarter of 2017, which resulted in a net gain of $542,000. 2017 also included a $2.9 million net gain from an eminent domain condemnation of one of our banking center buildings that had a net book value of $450,000 at the time of the condemnation. Leases The Company leases land and buildings under operating leases for varying periods extending to 2028, at which time the Company can exercise options that could extend certain leases through 2039. The future minimum annual rental payments required for leases that have initial or remaining noncancelable lease terms in excess of one year as of December 31, 2018, excluding property taxes and insurance, are as follows: As of December 31, 2018 Year: (Dollars in thousands) 2019 $ 9,261 2020 5,918 2021 4,077 2022 2,819 2023 1,179 Thereafter 1,707 Total $ 24,961 Total rental expense for the Company was approximately $7.7 million, $5.9 million and $5.6 million for the years ended December 31, 2018, 2017 and 2016, respectively.

Other Assets

Other Assets	12 Months Ended
	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other Assets	11. OTHER ASSETS Other assets were comprised of the following for the periods presented. As of December 31, 2018 2017 (Dollars in thousands) Prepaid expenses $ 6,393 $ 4,538 Interest rate swaps 1,938 3,211 Affordable housing investments 15,995 5,977 Other investments 33,031 801 Other assets 10,450 10,790 Total $ 67,807 $ 25,317

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	12. INCOME TAXES New tax legislation, referred to as the Tax Reform Act, was enacted on December 22, 2017. ASC 740, Accounting for Income Taxes, requires companies to recognize the effect of tax law changes in the period of enactment. Beginning in 2018, the Tax Reform Act reduces the federal tax rate for corporations from 35% to 21% and changes or limits certain tax deductions. During the fourth quarter of 2017, a $13.2 million one-time charge to income The current and deferred amounts of income tax expense consist of the following. For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Current provision: Federal $ 31,055 $ 44,153 $ 41,195 State 20,546 17,151 17,944 51,601 61,304 59,139 Deferred provision: Federal 5,158 20,926 1,208 State 2,353 2,154 510 7,511 23,080 1,718 Total $ 59,112 $ 84,384 $ 60,857 Income tax asset consists of the following. As of December 31, 2018 2017 (Dollars in thousands) Current: Federal $ 12,303 $ 11,713 State 6,800 2,946 19,103 14,659 Deferred: Federal 27,334 16,557 State 15,737 8,830 43,071 25,387 Total $ 62,174 $ 40,046 Temporary differences between the amounts reported in the financial statements and the tax bases of assets and liabilities resulted in deferred taxes. The components of the net deferred tax asset are as follows. As of December 31, 2018 2017 (Dollars in thousands) Deferred tax assets: Bad debt and credit loss deduction $ 22,402 $ 19,911 Net operating loss carryforward 141 207 Deferred compensation 6,109 5,501 PCI loans 2,556 3,098 California franchise tax 837 1,618 Accrued expense 4,865 1,365 Unrealized loss on investment securities, net 7,508 - Acquired loan discounts 25,555 2,081 Other, net 2,624 1,272 Gross deferred tax asset 72,597 35,053 Deferred tax liabilities: Depreciation 4,440 975 Intangibles - acquistions 19,843 3,404 FHLB Stock 2,527 2,400 Deferred income 2,716 2,112 Unrealized gain on investment securities, net - 775 Gross deferred tax liability 29,526 9,666 Net deferred tax asset $ 43,071 $ 25,387 Annual Effective Tax Rate The annual consolidated effective tax rate for the periods presented, is reconciled to the U.S. statutory income rate as follows. For the Year Ended December 31, 2018 2017 2016 Amount Percent Amount Percent Amount Percent (Dollars in thousands) Federal income tax at statutory rate $ 44,334 21.0 % $ 66,078 35.0 % $ 56,800 35.0 % State franchise taxes, net of federal benefit 17,905 8.5 % 12,903 6.9 % 11,299 7.0 % Tax-exempt income (2,991 ) -1.4 % (4,450 ) -2.4 % (5,848 ) -3.6 % Tax credits (1,451 ) -0.7 % (1,096 ) -0.6 % (846 ) -0.5 % Deferred tax asset revaluation adjustment - - 13,208 7.0 % - - Other, net 1,315 0.6 % (2,259 ) -1.2 % (548 ) -0.4 % Provision for income taxes $ 59,112 28.0 % $ 84,384 44.7 % $ 60,857 37.5 % There were no unrecognized tax benefits at December 31, 2018 The Company records interest and penalties related to uncertain tax positions as part of other operating expense. We do not expect the total amount of unrecognized tax benefits to significantly increase or decrease within the next twelve months. The Company is subject to federal income tax and franchise tax of the state of California. Our federal income tax returns for the years ended December 31, 2014 through 2018 are open to audit by the federal authorities and our California state tax returns for the years ended December 31, 2013 through 2018 are open to audit by state authorities.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Deposits	13. DEPOSITS The composition of deposits is summarized for the periods presented in the table below. As of December 31, 2018 2017 Amount Percent Amount Percent (Dollars in thousands) Noninterest-bearing deposits $ 5,204,787 58.96 % $ 3,846,436 58.75 % Interest-bearing deposits: Investment checking 460,972 5.22 % 433,971 6.63 % Money market 2,236,018 25.33 % 1,517,050 23.17 % Savings 393,769 4.46 % 364,049 5.56 % Time deposits 531,944 6.03 % 385,347 5.89 % Total deposits $ 8,827,490 100.00 % $ 6,546,853 100.00 % Time deposits with balances of $250,000 or more amounted to approximately $125.4 million and $ 108.5 million at December 31, 2018 and 2017, respectively. Interest expense on such deposits amounted to approximately $1.1 million, $545,000 and $444,000, for the years ended December 31, 2018, 2017 and 2016, respectively. At December , , the scheduled maturities of time certificates of deposit are as follows. December 31, 2018 Year of maturity: (Dollars in thousands) 2019 $ 398,735 2020 70,898 2021 46,710 2022 5,320 2023 and thereafter 10,281 Total $ 531,944

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Borrowings	14. BORROWINGS Customer Repurchase Agreements The Bank offers a repurchase agreement product to its customers. This product, known as Citizens Sweep Manager, sells our investment securities overnight to our customers under an agreement to repurchase them the next day at a price which reflects the market value of the use of funds by the Bank for the period concerned. These repurchase agreements are signed with customers who want to invest their excess deposits, above a pre-determined balance in a demand deposit account, in order to earn interest. As of December 31, 2018, total funds borrowed under these agreements were $ 442.3 million with a weighted average interest rate of 0.39%, compared to $553.8 million with a weighted average rate of 0.30%. Federal Home Loan Bank Advances At December 31, 2018 and 2017, there were no outstanding FHLB advances. At December 31, 2018, $5.71 billion of loans and $ 1.66 Other Borrowings At December 31, 2018, the Bank had $280.0 million short-term borrowings with the FHLB at a cost of 2.53%, compared to no short-term borrowings with the FHLB at December 31, 2017. Junior Subordinated Debentures On January 31, 2006, CVB Statutory Trust III completed a $25,000,000 offering of Trust Preferred Securities and used the gross proceeds from the offering and other cash totaling $25,774,000 to purchase a like amount of junior subordinated debentures of the Company. The junior subordinated debentures were issued concurrent with the issuance of the Trust Preferred Securities. The interest on junior subordinated debentures, paid by the Company to CVB Statutory Trust III, represents the sole revenues of CVB Statutory Trust III and the sole source of dividend distributions to the holders of the Trust Preferred Securities. The Company has fully and conditionally guaranteed all of CVB Statutory Trust III’s obligations under the Trust Preferred Securities. The Company has the right, assuming no default has occurred, to defer payments of interest on the junior subordinated debenture at any time for a period not to exceed 20 consecutive quarters. The Trust Preferred Securities will mature on March 15, 2036, but became callable in part or in total on March 15, 2011 by CVB Statutory Trust III. The Trust Preferred Securities have a variable per annum rate equal to LIBOR (as defined in the indenture dated as of January 31, 2006 (“Indenture”) between the Company and U.S. Bank National Association, as debenture trustee) plus 1.38% (the “Variable Rate”). As of December 31, 2018, these securities continue to be outstanding.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	15. COMMITMENTS AND CONTINGENCIES Commitments At December 31, 2018 and 2017, the Bank had commitments to extend credit of approximately $1.69 billion and $924.5 million, respectively, and obligations under letters of credit of $54.3 million and $37.6 million, respectively. Commitments to extend credit are agreements to lend to customers, provided there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Commitments are generally variable rate, and many of these commitments are expected to expire without being drawn upon. As such, the total commitment amounts do not necessarily represent future cash requirements. The Bank uses the same credit underwriting policies in granting or accepting such commitments or contingent obligations as it does for on-balance-sheet instruments, which consist of evaluating customers’ creditworthiness individually. The Bank had a reserve for unfunded loan commitments of $9.0 million as of December 31, 2018 and $6.3 million as of December 31, 2017 included in other liabilities. Standby letters of credit are conditional commitments issued by the Bank to guarantee the financial performance of a customer to a third party. Those guarantees are primarily issued to support private borrowing or purchase arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. When deemed necessary, the Bank holds appropriate collateral supporting those commitments. Management does not anticipate any material losses as a result of these transactions. At December 31, 2018, the Bank has available lines of credit totaling $3.96 billion from correspondent banks, FHLB and Federal Reserve Bank of which $3.59 billion were secured. Other Contingencies The Company and its subsidiaries are parties to various lawsuits and threatened lawsuits in the ordinary and non-ordinary course of business. From time to time, such lawsuits and threatened lawsuits may include, but are not limited to, actions involving wage-hour and labor law claims, consumer, lender liability claims and negligence claims, some of which may be styled as “class action” or representative cases. Some of these lawsuits may be similar in nature to other lawsuits pending against the Company’s competitors. The Company is a defendant and cross-complainant in an action entitled Edward A. Dunagan et al On November 7, 2018, the Court issued a statement of decision finding in favor of the Dunagans and against ASB on all three claims made by the plaintiffs enumerated above, denying ASB’s claims under the cross-complaint, and awarding damages and attorney’s fees and costs to the Dunagans in an aggregate amount of approximately $1.34 million. The Company has filed to appeal this decision. The Company also believes that the bankers professional liability insurance policy previously obtained by ASB (which provides for a $5 million per claim limit subject to a $100,000 For lawsuits where the Company has determined that a loss is both probable and reasonably estimable, a liability representing the best estimate of the Company’s financial exposure based on known facts has been recorded in accordance with FASB guidance over loss contingencies (ASC 450). However, as a result of inherent uncertainties in judicial interpretation and application of a myriad of laws applicable to the Company’s business, and the unique, complex factual issues presented in any given lawsuit, the Company often cannot determine the probability of loss or estimate the amount of damages which a plaintiff might successfully prove if the Company were found to be liable. For lawsuits or threatened lawsuits where a claim has been asserted or the Company has determined that it is probable that a claim will be asserted, and there is a reasonable possibility that the outcome will be unfavorable, the Company will disclose the existence of the loss contingency, even if the Company is not able to make an estimate of the possible loss or range of possible loss with respect to the action or potential action in question, unless the Company believes that the nature, potential magnitude or potential timing (if known) of the loss contingency is not reasonably likely to be material to the Company’s liquidity, consolidated financial position, and/or results of operations. Our accruals and disclosures for loss contingencies are reviewed quarterly and adjusted as additional information becomes available. We disclose a loss contingency and/or the amount accrued if we believe it is reasonably likely to be material or if we believe such disclosure is necessary for our financial statements to not be misleading. If we determine that an exposure to loss exists in excess of an amount previously accrued or disclosed, we assess whether there is at least a reasonable possibility that a loss, or additional loss, may have been incurred, and we adjust our accruals and disclosures accordingly. We do not presently believe that the ultimate resolution of any lawsuits currently pending against the Company will have a material adverse effect on the Company’s results of operations, financial condition, or cash flows. The outcome of litigation and other legal and regulatory matters is inherently uncertain, however, and it is possible that one or more of the legal matters currently pending or threatened against the Company could have a material adverse effect on our results of operations, financial condition or cash flows.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2018
Postemployment Benefits [Abstract]
Employee Benefit Plans	16. EMPLOYEE BENEFIT PLANS Deferred Compensation Plans As of December 31, 2018, the Company has various deferred compensation plans, and severance arrangements it assumed through the acquisition of other banks in prior years. These plans require the Company to make periodic payments to former employees upon retirement, upon a change in control, and in certain instances, to beneficiaries of former employees upon death. Payments made by the Company under these agreements totaled approximately $1.4 million, $1.6 million, and $610,000 for each of the years ended December 31, 2018, 2017 and 2016, respectively. The total expense recorded by the Company for these deferred compensation agreements was approximately $1.1 million, $1.2 million, and $684,000 for each of the years ended December 31, 2018, 2017 and 2016, respectively. On December 22, 2006, the Company approved a deferred compensation plan for its President and Chief Executive Officer, Christopher D. Myers. Under the plan, which became effective on January 1, 2007, Mr. Myers may defer up to 75% of his base salary and up to 100% of his bonus for each calendar year in which the Plan is effective. The Company has the discretion to make additional contributions to the Plan for the benefit of Mr. Myers. No discretionary payments were made by the Company during the years ended December 31, 2018, 2017 and 2016. On March 31, 2007, the Company approved the Executive Non-qualified Excess Plan, a deferred compensation plan for certain management employees to provide a means by which they may elect to defer receipt of compensation in order to provide retirement benefits. The plan is intended to be unfunded and primarily serve the purpose of providing deferred compensation benefits for a select group of employees. The Bank, however, does fund the cost of these plans through the purchase of life insurance policies, which are recorded in other assets of the consolidated balance sheets. At December 31, 2018 and 2017, the amount of deferred compensation liability was $2.4 million and $2.1 million, respectively. 401(k) and Profit Sharing Plan The Bank sponsors a 401(k) and profit-sharing plan for the benefit of its employees. Employees are eligible to participate in the plan immediately upon hire. Employees may make contributions to the plan under the plan’s 401(k) component. The Bank contributes 3%, non-matching, to the plan to comply with ERISA’s safe harbor provisions. The Bank may make additional contributions under the plan’s profit-sharing component, subject to certain limitations. The Bank’s total contributions are determined by the Board of Directors and amounted to approximately $3.5 million for 2018, $3.2 million for 2017, and $2.8 million for 2016.

Earnings Per Share Reconciliati

Earnings Per Share Reconciliation	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share Reconciliation	17. 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 years ended December 31, 2018, 2017 and 2016, shares deemed to be antidilutive, and thus excluded from the computation of earnings per common share were 160,000, 9,000 and 291,000, 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. For the Year Ended December 31, 2018 2017 2016 (In thousands, except per share amounts) Earnings per common share: Net earnings $ 152,003 $ 104,411 $ 101,429 Less: Net earnings allocated to restricted stock 429 382 421 Net earnings allocated to common shareholders $ 151,574 $ 104,029 $ 101,008 Weighted average shares outstanding 121,670 109,409 107,282 Basic earnings per common share $ 1.25 $ 0.95 $ 0.94 Diluted earnings per common share: Net income allocated to common shareholders $ 151,574 $ 104,029 $ 101,008 Weighted average shares outstanding 121,670 109,409 107,282 Incremental shares from assumed exercise of outstanding options 287 398 405 Diluted weighted average shares outstanding 121,957 109,807 107,687 Diluted earnings per common share $ 1.24 $ 0.95 $ 0.94

Stock-Based Compensation Plans

Stock-Based Compensation Plans	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based Compensation Plans	18. STOCK-BASED COMPENSATION PLANS In May 9,000,000 Stock Options The Company expensed $400,281, $399,000, and $485,000, for the years ended December 31, 2018, 2017 and 2016, respectively. The estimated fair value of the options granted during 2018 and prior years was calculated using the Black-Scholes options pricing model. There were 140,500, 11,500 and 121,500 options granted during 2018, 2017 and 2016, respectively. The options will vest, in equal installments, over a five-year period. The fair value of each stock option granted in 2018 , 2017 and 2016 , was estimated on the date of grant using the following weighted-average assumptions. For the Year Ended December 31, 2018 2017 2016 Dividend yield 2.4% 2.2% 2.9% Volatility 25.4% 29.6% 33.1% Risk-free interest rate 2.9% 1.8% 1.2% Expected life 5.4 years 5.6 years 5.6 years Weighted average grant date fair value $ 5.08 $ 5.17 $ 3.96 The expected volatility is solely based on the daily historical stock price volatility over the expected option life. The expected life of options granted is derived from the output of the option valuation model and represents the period of time an optionee will hold an option before exercising it. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury five-year constant maturity yield curve in effect at the time of the grant. In connection with the adoption of ASU 2016-09 the Company elected to account for forfeitures as they occur, rather than to estimate forfeitures over the vesting period. The following table presents option activity under the Company’s stock option plans as of and for the year ended December 31, 2018. Number of Stock Options Outstanding Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (In thousands) (In years) (In thousands) Outstanding at January 1, 2018 588 $ 13.12 Granted 141 23.73 Exercised (167 ) 10.21 Forfeited or expired (30 ) 15.07 Outstanding at December 31, 2018 532 $ 16.73 6.26 $ 2,368 Vested or expected to vest at December 31, 2018 514 $ 16.73 6.23 $ 2,303 Exercisable at December 31, 2018 275 $ 13.29 4.31 $ 1,915 The total intrinsic value of options exercised during the years ended December 31, 2018, 2017 and 2016 was $2.2 million, $3.8 million and $3.9 million, respectively. As of December 31, 2018, there was a total of $957,000 in unrecognized compensation cost related to nonvested options granted under the Plan. That cost is expected to be recognized over a weighted-average period of approximately 2.9 years. The total fair value of options vested was $364,000, $505,000 and $489,000 during 2018, 2017 and 2016, respectively. Cash received from stock option exercises was $1.7 million, $2.7 million and $5.2 million, in 2018, 2017 and 2016, respectively. At December 31, 2018, options for the purchase of 531,916 shares of CVB’s common stock were outstanding under the above plans, of which options to purchase 275,416 shares were exercisable at prices ranging from $7.68 to $23.69. The Company has a policy of issuing new shares to satisfy share option exercises. Restricted Stock Awards and Restricted Stock Units The Company granted 424,000, 73,000 and 166,500 restricted stock awards during 2018, 2017 and 2016 respectively. The weighted average grant date fair value of RSAs and RSUs granted in 2018, 2017 and 2016 was $23.84 per share, $21.59 per share and $16.89 per share, respectively. These awards will vest, in equal installments, over a period of three or five years. Compensation cost is recognized over the requisite service period, which is three or five years, and amounted to $3.1 million, $2.6 million and $2.3 million during the years ended December 31, 2018, 2017 and 2016, respectively. Total unrecognized compensation cost related to was $8.8 million at December 31, 2018. The table below summarizes activity related to the Company’s non-vested for the year ended December 31, 2018. Shares Weighted Value (In thousands) Nonvested at January 1, 2018 376 $ 16.82 Granted 424 23.84 Vested (158 ) 16.50 Forfeited (18 ) 20.57 Nonvested at December 31, 2018 624 $ 21.56 Under the 2018 Equity Incentive Plan, 8,019,000 shares of common stock were available for the granting of future stock-based awards as of December 31, 2018.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Regulatory Matters	19. REGULATORY MATTERS The Company (on a consolidated basis) and the Bank are subject to various regulatory capital requirements administered by the federal banking regulatory agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct, material effect on the Company’s and the Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and Bank must meet specific capital guidelines that involve quantitative measures of assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgment by the regulators about components, risk-weightings, and other factors. Prompt corrective action provisions are not applicable to bank holding companies. Effective January 1, 2015, the Company and the Bank became subject to a new regulatory capital measure called Common Equity Tier 1 (“CET1”) to risk-weighted assets which was implemented as a result of the “Basel III” regulatory capital reforms and changes required by the Dodd-Frank Act. Basel III also introduces a new “capital conservation buffer,” composed entirely of CET1, on top of minimum risk-weighted asset ratios. The capital conservation buffer is designed to absorb losses during periods of economic stress. Banking institutions with a ratio of CET1 to risk-weighted assets above the minimum requirement but below the capital conservation buffer will face constraints on dividends, equity repurchases and payment of discretionary bonuses based on the amount of the shortfall. The implementation of the capital conservation buffer began on January 1, 2016 at 0.625% and will be phased in over a four-year period (increasing by that amount on each subsequent January 1, until it reaches 2.5% on January 1, 2019). Thus, when fully phased in on January 1, 2019, the Bank will be required to maintain this additional capital conservation buffer of 2.5% of CET1. Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (set forth in the table below) of total capital, Tier 1 capital and CET1 capital to risk-weighted assets, and of Tier 1 capital to average assets. Management believes that, as of December 31, 2018 and 2017, the Company and the Bank meet all capital adequacy requirements to which they are subject. As of December 31, 2018 and 2017, the most recent notifications from the FDIC categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, the minimum total risk-based, Tier 1 risk-based, CET1 risk-based, and Tier 1 leverage (tangible Tier 1 capital divided by average total assets) ratios as set forth in the table below must be maintained. There are no conditions or events since said notification that management believes have changed the Bank’s category. As of December 31, 2018 and 2017, the Company had $25.0 million of trust-preferred securities, which were included in Tier 1 capital for regulatory purposes, respectively. The following table summarizes regulatory capital amounts and ratios for the Company and the Bank as of December 31, 2018 and 2017. To Be Well For Capital Capitalized under Prompt Corrective Actual Adequacy Purposes Action Provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) As of December 31, 2018: Total Capital (to Risk-Weighted Assets) Company $ 1,263,800 14.13 % $ 715,283 > 8.00 % N/A Bank $ 1,253,219 14.03 % $ 714,601 > 8.00 % $ 893,251 > 10.00 % Tier 1 Capital (to Risk-Weighted Assets) Company $ 1,191,228 13.32 % $ 536,462 > 6.00 % N/A Bank $ 1,180,647 13.22 % $ 535,951 > 6.00 % $ 714,601 > 8.00 % Common equity Tier 1 capital ratio Company $ 1,166,228 13.04 % $ 402,347 > 4.50 % N/A Bank $ 1,180,647 13.22 % $ 401,963 > 4.50 % $ 580,613 > 6.50 % Tier 1 Capital (to Average- Assets) Company $ 1,191,228 10.98 % $ 433,834 > 4.00 % N/A Bank $ 1,180,647 10.90 % $ 433,403 > 4.00 % $ 541,754 > 5.00 % As of December 31, 2017: Total Capital (to Risk-Weighted Assets) Company $ 1,039,060 18.01 % $ 461,574 > 8.00 % N/A Bank $ 1,029,126 17.86 % $ 461,037 > 8.00 % $ 576,296 > 10.00 % Tier 1 Capital (to Risk-Weighted Assets) Company $ 973,169 16.87 % $ 346,180 > 6.00 % N/A Bank $ 963,235 16.71 % $ 345,778 > 6.00 % $ 461,037 > 8.00 % Common equity Tier 1 capital ratio Company $ 948,210 16.43 % $ 259,635 > 4.50 % N/A Bank $ 963,235 16.71 % $ 259,333 > 4.50 % $ 374,592 > 6.50 % Tier 1 Capital (to Average- Assets) Company $ 973,169 11.88 % $ 327,680 > 4.00 % N/A Bank $ 963,235 11.77 % $ 327,397 > 4.00 % $ 409,246 > 5.00 % In addition, the Financial Code limits the amount of dividends a bank can pay without obtaining prior approval from bank regulators. Under this law, the Bank could, as of December 31, 2018, declare and pay additional dividends of approximately $184.0 million.

Fair Value Information

Fair Value Information	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Information	20. 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 December 31 , 2018 . 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 There were no transfers in and out of Level 1 and Level 2 during the years ended December 31 , 2018 and 2017. 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 for the periods presented. Carrying Value at December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Description of assets Investment securities - AFS: Residential mortgage-backed securities $ 1,474,508 $ - $ 1,474,508 $ - CMO/REMIC - residential 214,051 - 214,051 - Municipal bonds 44,810 - 44,810 - Other securities 716 - 716 - Total investment securities - AFS 1,734,085 - 1,734,085 - Interest rate swaps 1,938 - 1,938 - Total assets $ 1,736,023 $ - $ 1,736,023 $ - Description of liability Interest rate swaps $ 1,938 $ - $ 1,938 $ - Total liabilities $ 1,938 $ - $ 1,938 $ - Carrying Value at December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Description of assets Investment securities - AFS: Residential mortgage-backed securities $ 1,750,909 $ - $ 1,750,909 $ - CMO/ REMIC - residential 273,829 - 273,829 - Municipal bonds 55,496 - 55,496 - Other securities 751 - 751 - Total investment securities - AFS 2,080,985 - 2,080,985 - Interest rate swaps 3,211 - 3,211 - Total assets $ 2,084,196 $ - $ 2,084,196 $ - Description of liability Interest rate swaps $ 3,211 $ - $ 3,211 $ - Total liabilities $ 3,211 $ - $ 3,211 $ - Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis We may be required to measure certain assets at fair value on a non-recurring basis in accordance with GAAP. These adjustments to fair value usually result from application of lower of cost or fair value accounting or write-downs of individual assets. For assets measured at fair value on a non-recurring basis that were held on the balance sheet at December 31 , 2018 and 2017 , respectively, 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 December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Losses For the Year Ended December 31, 2018 (Dollars in thousands) Description of assets Impaired loans, excluding PCI loans: Commercial and industrial $ 189 $ - $ - $ 189 $ 3 SBA - - - - - Real estate: Commercial real estate 3,143 - - 3,143 478 Construction - - - - - SFR mortgage - - - - - Dairy & livestock and agribusiness 78 - - 78 12 Consumer and other loans 68 - - 68 68 Other real estate owned - - - - - Asset held-for-sale - - - - - Total assets $ 3,478 $ - $ - $ 3,478 $ 561 Carrying Value at Quoted Prices in Identical Assets (Level 1) Significant Other (Level 2) Significant (Level 3) Total Losses (Dollars in thousands) Description of assets Impaired loans, excluding PCI loans: Commercial and industrial $ - $ - $ - $ - $ - SBA - - - - - Real estate: Commercial real estate - - - - - Construction - - - - - SFR mortgage - - - - - Dairy & livestock and agribusiness - - - - - Consumer and other loans 378 - - 378 74 Other real estate owned - - - - - Asset held-for-sale - - - - - Total assets $ 378 $ - $ - $ 378 $ 74 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 December 31, 2018 and 2017, respectively. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. December 31, 2018 Estimated Fair Value Carrying Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 163,948 $ 163,948 $ - $ - $ 163,948 Interest-earning balances due from depository institutions 7,670 - 7,339 - 7,339 Investment securities available-for-sale 1,734,085 - 1,734,085 - 1,734,085 Investment securities held-to-maturity 744,440 - 721,537 - 721,537 Total loans, net of allowance for loan losses (1) 7,700,998 - - 7,514,964 7,514,964 Swaps 1,938 - 1,938 - 1,938 Liabilities Deposits: Interest-bearing $ 3,622,703 $ - $ 3,614,682 $ - $ 3,614,682 Borrowings 722,255 - 721,601 - 721,601 Junior subordinated debentures 25,774 - - 21,176 21,176 Swaps 1,938 - 1,938 - 1,938 (1) The fair value of loans as of December 31, 2018 was measured using an exit price notion. December 31, 2017 Estimated Fair Value Carrying Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and due from banks $ 144,377 $ 144,377 $ - $ - $ 144,377 Interest-earning balances due from depository institutions 17,952 - 17,951 - 17,951 FHLB stock 17,688 - 17,688 - 17,688 Investment securities available-for-sale 2,080,985 - 2,080,985 - 2,080,985 Investment securities held-to-maturity 829,890 - 819,215 - 819,215 Total loans, net of allowance for loan losses 4,771,046 - - 4,678,402 4,678,402 Swaps 3,211 - 3,211 - 3,211 Liabilities Deposits: Noninterest-bearing $ 3,846,436 $ 3,846,436 $ - $ - $ 3,846,436 Interest-bearing 2,700,417 - 2,697,781 - 2,697,781 Borrowings 553,773 - 553,416 - 553,416 Junior subordinated debentures 25,774 - - 18,070 18,070 Swaps 3,211 - 3,211 - 3,211 The fair value estimates presented herein are based on pertinent information available to management as of December 31, 2018 and 2017. 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	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	21. 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 December 31, 2018, the Bank has entered into 73 interest-rate swap agreements with customers. The Bank then entered into identical offsetting swaps with a counterparty bank. 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, which has the effect of passing on the interest-rate risk associated with the customer’s fixed rate swap to the counterparty bank. 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. Our interest rate swap derivatives are subject to a master netting arrangement with one counterparty bank. None of our derivative assets and liabilities are offset in the 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 December 31, 2018 and 2017, the total notional amount of the Company’s swaps was $195.4 million and $198.5 million, respectively. The location of the asset and liability, and their respective fair values are summarized in the tables below. December 31, 2018 Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 1,938 Other liabilities $ 1,938 Total derivatives $ 1,938 $ 1,938 December 31, 2017 Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 3,211 Other liabilities $ 3,211 Total derivatives $ 3,211 $ 3,211 The Effect of Derivative Financial Instruments on the Consolidated Statements of Earnings The following table summarizes the effect of derivative financial instruments on the consolidated statements of earnings for the periods presented. Derivatives Not Instruments Location of Gain Amount of Gain Recognized in Income on Derivative Instruments For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Interest rate swaps Other income $ 340 $ 615 $ 691 Total $ 340 $ 615 $ 691

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Other Comprehensive Income (Loss)	22. OTHER COMPREHENSIVE INCOME (LOSS) The tables below provide a summary of the components of OCI for the periods presented. For the Year Ended December 31, 2018 2017 2016 Before-tax Tax effect After-tax 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 $ (26,435 ) $ 7,815 $ (18,620 ) $ (11,336 ) $ 4,760 $ (6,576 ) $ (15,792 ) $ 6,633 $ (9,159 ) Amortization of unrealized (gains)/ losses on securities transferred from available-for-sale to held-to-maturity (2,091 ) 619 (1,472 ) (3,293 ) 1,383 (1,910 ) (2,174 ) 913 (1,261 ) Net realized (gain)/loss reclassified into earnings (1) — — — (402 ) 169 (233 ) (548 ) 230 (318 ) Net change $ (28,526 ) $ 8,434 $ (20,092 ) $ (15,031 ) $ 6,312 $ (8,719 ) $ (18,514 ) $ 7,776 $ (10,738 ) (1) Included in other noninterest income.

Balance Sheet Offsetting

Balance Sheet Offsetting	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Balance Sheet Offsetting	23. 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 a master netting arrangement with one counterparty bank. 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 the counterparty bank 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. Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset in the Consolidated Balance Sheets the Consolidated Consolidated in the Financial Instruments Collateral Pledged Net Amount (Dollars in thousands) December 31, 2018 Financial assets: Derivatives not designated as hedging instruments $ 1,938 $ — $ — $ 1,938 $ — $ 1,938 Total $ 1,938 $ — $ — $ 1,938 $ — $ 1,938 Financial liabilities: Derivatives not designated as hedging instruments $ 4,203 $ (2,265 ) $ 1,938 $ 2,265 $ — $ 4,203 Repurchase agreements 442,255 — 442,255 — (487,607 ) (45,352 ) Total $ 446,458 $ (2,265 ) $ 444,193 $ 2,265 $ (487,607 ) $ (41,149 ) December 31, 2017 Financial assets: Derivatives not designated as hedging instruments $ 3,211 $ — $ — $ 3,211 $ — $ 3,211 Total $ 3,211 $ — $ — $ 3,211 $ — $ 3,211 Financial liabilities: Derivatives not designated as hedging instruments $ 4,495 $ (1,284 ) $ 3,211 $ 1,284 $ (12,760 ) $ (8,265 ) Repurchase agreements 553,773 — 553,773 — (573,759 ) (19,986 ) Total $ 558,268 $ (1,284 ) $ 556,984 $ 1,284 $ (586,519 ) $ (28,251 )

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognition	24. REVENUE RECOGNITION On January 1, 2018, the Company adopted ASU No. 2014-09 “Revenue from Contracts with Customers (Topic 606)” and all subsequent ASUs that modified Topic 606. As stated in Note 3 – Summary of Significant Accounting Policies Topic 606 does not apply to revenue associated with financial instruments, including revenue from loans and securities. In addition, certain noninterest income streams such as fees associated with mortgage servicing rights, financial guarantees, derivatives, and certain credit card fees are also not in scope of the new guidance. Topic 606 is applicable to noninterest revenue streams such as trust and asset management income, deposit related fees, interchange fees, and merchant income. However, the recognition of these revenue streams did not change significantly upon adoption of Topic 606. Substantially all of the Company’s revenue is generated from contracts with customers. Noninterest revenue streams in-scope of Topic 606 are discussed below. Trust and Investment Services Trust and asset management income is primarily comprised of fees earned from the management and administration of trusts and customer assets. The Company’s performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the monthly market value of the assets under management and the applicable fee rate. Payment is generally received at month end through a direct charge to customers’ accounts. The Company does not earn performance-based incentives. Other services related to real estate and tax return preparation services are also provided to existing trust and asset management customers. The Company’s performance obligation for these transactional-based services is generally satisfied, and related revenue recognized, at a point in time (i.e., as incurred). Payment is received shortly after services are rendered. Wealth Management contracts with customers have no clauses that would entitle customers to additional services. Fees are generally earned based on market value of assets under management (AUM) and miscellaneous fees are transaction driven and are charged based on an agreed upon fee schedule. Performance obligation is satisfied upon execution of the transaction and there is no need to allocate transaction price to the performance obligation(s) in the contract. Wealth Management customers can also terminate the contract at will. Based on our review, we did not find provisions in the contracts that will require changes to the current accounting under Topic 606. For Investment Services, the fees are earned based on services performed for customers as provided through an affiliated broker-dealer. Fees are earned from gross dealer commission based on trade date. Performance obligation is satisfied upon execution of the transaction and there is no need to allocate transaction price to the performance obligation(s) in the contract. Based on our review, we did not find provisions in the contracts that will require changes to the current accounting under Topic 606. Deposit-related Fees Service charges on deposit accounts consist of account analysis fees earned on analyzed business checking accounts, monthly service fees, and other deposit account related fees. The Company’s performance obligation for account analysis fees and monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Other deposit account related fees are largely transactional based, and therefore, the Company’s performance obligation is satisfied, and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. Bankcard Services The Bank generates revenues from merchant servicing to its clients. A fee schedule is part of the contract and is calculated based on sales of merchants on a monthly basis. There is no future promise or claim to deliver services as merchant fees are based on monthly merchant transactions. The Company’s performance obligations are largely satisfied, and related revenue recognized, when the services are rendered or upon completion. Payment is typically received immediately or in the following month. Therefore, the new revenue standard has no impact on revenues generated from bankcard services. The following presents noninterest income, segregated by revenue streams in-scope out-of-scope For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Noninterest income: In-scope Service charges on deposit accounts $ 17,070 $ 15,809 $ 15,066 Trust and investment services 8,774 9,845 9,595 Bankcard services 3,485 3,406 2,921 Gain on OREO, net 3,546 6 (20 ) Other 6,588 4,888 3,457 Noninterest Income (in-scope 39,463 33,954 31,019 Noninterest Income (out-of-scope 4,018 8,164 4,533 Total noninterest income $ 43,481 $ 42,118 $ 35,552 Contract Balances A contract asset balance occurs when an entity performs a service for a customer before the customer pays consideration (resulting in a contract receivable) or before payment is due (resulting in a contract asset). A contract liability balance is an entity’s obligation to transfer a service to a customer for which the entity has already received payment (or payment is due) from the customer. The Company’s noninterest revenue streams are largely based on transactional activity, or standard month-end month-end Contract Acquisition Costs In connection with the adoption of Topic 606, an entity is required to capitalize, and subsequently amortize into expense, certain incremental costs of obtaining a contract with a customer if these costs are expected to be recovered. The incremental costs of obtaining a contract are those costs that an entity incurs to obtain a contract with a customer that it would not have incurred if the contract had not been obtained (for example, sales commission). The Company utilizes the practical expedient, which allows entities to immediately expense contract acquisition costs when the asset that would have resulted from capitalizing these costs would have been amortized in one year or less. Upon adoption of Topic 606, the Company did not capitalize any contract acquisition costs.

Condensed Financial Information

Condensed Financial Information of Parent Company	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information of Parent Company	25. CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY The following tables provide the parent company only condensed balance sheets, condensed statements of earnings and condensed statements of cash flows for the periods presented. CVB FINANCIAL CORP. CONDENSED BALANCE SHEETS As of December 31, 2018 2017 (Dollars in thousands) Assets Investment in subsidiaries $ 1,865,609 $ 1,084,332 Other assets, net 31,628 26,703 Total assets $ 1,897,237 $ 1,111,035 Liabilities $ 46,047 $ 41,769 Stockholders’ equity 1,851,190 1,069,266 Total liabilities and stockholders’ equity $ 1,897,237 $ 1,111,035 CVB FINANCIAL CORP. CONDENSED STATEMENTS OF EARNINGS For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Excess in net earnings of subsidiaries $ 78,601 $ 50,253 $ 55,192 Dividends from the Bank 77,800 57,000 49,000 Other expense, net (4,398 ) (2,842 ) (2,763 ) Net earnings $ 152,003 $ 104,411 $ 101,429 CVB FINANCIAL CORP. CONDENSED STATEMENTS OF CASH FLOWS For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Cash Flows from Operating Activities Net earnings $ 152,003 $ 104,411 $ 101,429 Adjustments to reconcile net earnings to cash used in operating activities: Earnings of subsidiaries (156,401 ) (107,253 ) (104,192 ) Tax settlement received from the Bank — 1,577 2,557 Stock-based compensation 3,508 2,953 2,803 Other operating activities, net (2,052 ) (1,725 ) (3,362 ) Total adjustments (154,945 ) (104,448 ) (102,194 ) Net cash used in operating activities (2,942 ) (37 ) (765 ) Cash Flows from Investing Activities Dividends received from the Bank 77,800 57,000 49,000 Net cash provided by investing activities 77,800 57,000 49,000 Cash Flows from Financing Activities Cash dividends on common stock (65,966 ) (57,047 ) (51,625 ) Proceeds from exercise of stock options 1,701 2,683 5,151 Tax benefit related to exercise of stock options — — 932 Repurchase of common stock (7,760 ) (1,128 ) (1,907 ) Net cash used in financing activities (72,025 ) (55,492 ) (47,449 ) Net increase in cash and cash equivalents 2,833 1,471 786 Cash and cash equivalents, beginning of period 19,217 17,746 16,960 Cash and cash equivalents, end of period $ 22,050 $ 19,217 $ 17,746

Quarterly Financial Data

Quarterly Financial Data	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data	26. QUARTERLY FINANCIAL DATA (UNAUDITED) The following table sets forth our unaudited, quarterly results for the periods indicated. For the Three Months Ended December 31, September 30, June 30, March 31, (Dollars in thousands, except per share amounts) 2018 Net interest income $ 113,016 $ 92,820 $ 72,688 $ 70,521 Provision for (recapture of) loan losses 3,000 500 (1,000 ) (1,000 ) Net earnings 43,159 38,558 35,373 34,913 Basic earnings per common share 0.31 0.30 0.32 0.32 Diluted earnings per common share 0.31 0.30 0.32 0.32 2017 Net interest income $ 71,275 $ 71,739 $ 70,483 $ 65,433 Recapture of provision for loan losses (1,500 ) (1,500 ) (1,000 ) (4,500 ) Net earnings 17,851 29,683 28,373 28,504 Basic earnings per common share 0.16 0.27 0.26 0.26 Diluted earnings per common share 0.16 0.27 0.26 0.26

Accounting policies (Policies)

Accounting policies (Policies)	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reclassification	Reclassification — Certain amounts in the prior periods’ financial statements and related footnote disclosures have been reclassified to conform to the current presentation with no impact on previously reported net income or stockholders’ equity.
Business Segments	Business Segments As of December 31, 2018, we operated as one reportable segment. The factors considered in making this determination include the nature of products and offered services, geographic regions in which we operate, the applicable regulatory environment, and the materiality of discrete financial information reviewed by our key decision makers. Through our network of banking centers, we provide relationship-based banking products, services and solutions for small to mid-sized companies, real estate investors, non-profit organizations, professionals and other individuals. Our products include loans for commercial businesses, commercial real estate, multi-family, construction, land, dairy & livestock and agribusiness, consumer and government-guaranteed small business loans. We also provide business deposit products and treasury cash management services, as well as deposit products to the owners and employees of the businesses we serve. The decision to combine our two reportable segments was made to align the segment reporting with the changes in our operations and reporting structure, and to be consistent with the level and materiality of information reviewed by our key decision makers.
Cash and cash equivalents	Cash and cash equivalents — Cash on hand, cash items in the process of collection, and amounts due from correspondent banks, the Federal Reserve Bank and interest-bearing balances due from depository institutions with initial terms of ninety days or less, are included in Cash and cash equivalents.
Investment Securities	Investment Securities — The Company classifies as held-to-maturity (“HTM”) those debt securities that the Company has the positive intent and ability to hold to maturity. Securities classified as trading are those securities that are bought and held principally for the purpose of selling them in the near term. All other debt and equity securities are classified as available-for-sale (“AFS”). Securities held-to-maturity are accounted for at cost and adjusted for amortization of premiums and accretion of discounts. Trading securities are accounted for at fair value with the unrealized gains and losses being included in current earnings. Available-for-sale securities are accounted for at fair value, with the net unrealized gains and losses, net of income tax effects, presented as a separate component of stockholders’ equity. Realized gains and losses on sales of securities are recognized in earnings at the time of sale and are determined on a specific-identification basis. Purchase premiums and discounts are recognized in interest income using the effective-yield method over the estimated terms of the securities. For mortgage-backed securities (“MBS”), the amortization or accretion is based on estimated average lives of the securities. The lives of these securities can fluctuate based on the amount of prepayments received on the underlying collateral of the securities. The Company’s investment in the Federal Home Loan Bank of San Francisco (“FHLB”) stock is carried at cost. At each reporting date, securities are assessed to determine whether there is an other-than-temporary impairment (“OTTI”). Other-than-temporary impairment on investment securities is not recognized in earnings when there are credit losses on a debt security for which management does not intend to sell and for which it is more-likely-than-not that the Company will not have to sell prior to recovery of the noncredit impairment. Otherwise, the portion of the total impairment that is attributable to the credit loss would be recorded in earnings, and the remaining difference between the debt security’s amortized cost and its fair value would be included in other comprehensive income.
Loans and Lease Finance Receivables	Loans and Lease Finance Receivables — Loans and lease finance receivables that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding, less deferred net loan origination fees and purchase price discounts. Purchase Credit Impaired (“PCI”) loans are those loans that when we acquired them were deemed to be impaired. PCI loans are included in total loans and lease finance receivables as of December 31, 2018. Refer to Note 7 — Loans and Lease Finance Receivables and Allowance for Loan Losses for total loans, excluding PCI loans, by type and to Note 6 — Acquired SJB Assets and FDIC Loss Sharing Asset for PCI loans by type. In the ordinary course of business, the Company enters into commitments to extend credit to its customers. To the extent that such commitments are unfunded, the related unfunded amounts are not reflected in the accompanying consolidated financial statements. The Company receives collateral to support loans, lease finance receivables, and commitments to extend credit for which collateral is deemed necessary. The most significant categories for which collateral is deemed necessary are real estate, principally commercial and industrial income-producing properties, Small Business Administration (“SBA”) loans, real estate mortgages, assets utilized in dairy & livestock and agribusiness, and various personal property assets utilized in commercial and industrial business governed by the Uniform Commercial Code. Nonrefundable fees and direct costs associated with the origination or purchase of loans are deferred and netted against outstanding loan balances. The deferred net loan fees and costs and purchase price discounts are recognized in interest income over the loan term using the effective-yield method. Interest on loans and lease finance receivables, excluding PCI loans, is credited to income based on the principal amounts of such loans or receivables outstanding. Loans are considered delinquent when principal or interest payments are past due 30 days or more and generally remain on accrual status between 30 and 89 days past due. Interest income is not recognized on loans and lease finance receivables when collection of interest is deemed by management to be doubtful. Loans, excluding PCI loans, on which the accrual of interest has been discontinued are designated as nonaccrual loans. In general, interest shall not accrue on any loan, excluding PCI loans, for which payment in full of principal and interest is not expected, or when the loan becomes 90 days past due, unless the loan is both well secured and in the process of collection. Factors considered in determining that the full collection of principal and interest is no longer probable include cash flow and liquidity of the borrower or property, the financial position of the guarantors and their willingness to support the loan as well as other factors, and this determination involves significant judgment. When an asset is placed on nonaccrual status, previously accrued but unpaid interest is reversed against income. Subsequent collections of cash are applied as reductions to the principal balance unless the loan is returned to accrual status. Interest is not recognized using a cash-basis method. Nonaccrual loans may be restored to accrual status when principal and interest become current and when the borrower is able to demonstrate payment performance for a sustained period, typically for six months. A nonaccrual loan may return to accrual status sooner based on other significant events or mitigating circumstances. This policy is consistently applied to all types of loans and lease finance receivables, excluding PCI loans.
Troubled Debt Restructurings	Troubled Debt Restructurings — Loans are reported as a Troubled Debt Restructuring (“TDR”) if the Company for economic or legal reasons related to the debtor’s financial difficulties grants a concession to the debtor that it would not otherwise consider. Types of modifications that may be considered concessions, which in turn result in a TDR include, but are not limited to, (i) a reduction of the stated interest rate for the remaining original life of the debt, (ii) an extension of the maturity date or dates at a stated interest rate lower than the current market rate for new debt with similar risk, (iii) a reduction of the face amount or maturity amount of the debt as stated in the instrument or other agreement, or (iv) a reduction of interest. As a result of these concessions, restructured loans are considered impaired, and the measurement of impairment is based on the Company’s policy for impaired loans. In addition, the Company may provide a concession to the debtor where it offers collateral and the value of such collateral is significant in proportion to the nature of the concession requested, and it substantially reduces the Company’s risk of loss. In such cases, these modifications are not considered a TDR as, in substance, no concession was made as a result of the significant additional collateral obtained. When determining whether or not a loan modification is a TDR under ASC 310-40, the Company evaluates loan modification requests from borrowers experiencing financial difficulties on a case-by-case basis. Any such modifications granted are unique to the borrower’s circumstances. Because of the Company’s focus on the commercial lending sector, each business customer has unique attributes, which in turn means that modifications of loans to those customers are not easily categorized by type, key features, or other terms, but are evaluated individually based on all relevant facts and circumstances pertaining to the modification request and the borrower’s/guarantor’s financial condition at the time of the request. The evaluation of whether or not a borrower is experiencing financial difficulties will include, among other relevant factors considered by the Company, a review of significant factors such as (i) whether the borrower is in default on any of its debt, (ii) whether the borrower is experiencing payment delinquency, (iii) whether the global cash flows of the borrower and the owner guarantor(s) of the borrower have diminished below what is necessary to service existing debt obligations, (iv) whether the borrower’s forecasted cash flows will be insufficient to service the debt in future periods or in accordance with the contractual terms of the existing agreement through maturity, (v) whether the borrower is unable to refinance the subject debt from other financing sources with similar terms, and (vi) whether the borrower is in jeopardy as a going-concern and/or considering bankruptcy. In any case, the debtor is presumed to be experiencing financial difficulties if the Company determines it is probable the debtor will default on the original loan if the modification is not granted. The types of loans subject to modification vary greatly, but during the subject period are concentrated in commercial and industrial loans, dairy & livestock and agribusiness loans, and term loans to commercial real estate investors. Some examples of key features include payment deferrals and delays, interest rate reductions, and extensions or renewals where the contract rate may or may not be below the market rate of interest for debt with similar characteristics as those of the modified debt. The typical length of the modified terms ranges from three (3) to twelve (12) months; however, all actual modified terms will depend on the facts, circumstances and attributes of the specific borrower requesting a modification. In general, after a careful evaluation of all relevant facts and circumstances taken together, including the nature of any concession, certain modification requests will result in troubled debt restructurings while certain other modifications will not, pursuant to the criteria and judgments as discussed throughout this report. In certain cases, modification requests for delays or deferrals of principal were evaluated and determined to be exempt from TDR reporting because they constituted insignificant delays under ASC 310-40-15. In situations where the Company has determined that the borrower is experiencing financial difficulties and is evaluating whether a concession is insignificant, and therefore does not result in a TDR, such analysis is based on an evaluation of both the amount and the timing of the restructured payments, including the following factors: 1. Whether the amount of the restructured payments subject to delay is insignificant relative to the unpaid principal balance or collateral value of the debt and will result in an insignificant shortfall in the contractual amount due; and 2. The delay is insignificant relative to any of the following: • The frequency of payments due; • The debt’s original contractual maturity; or • The debt’s original expected duration. Most modified loans not classified and accounted for as a TDR were performing and paying as agreed under their original terms in the six-month period immediately preceding a request for modification. Subsequently, these modified loans have continued to perform under the modified terms and deferrals that amounted to insignificant delays, which in turn is supported by the facts and circumstances of each individual customer and loan as described above. Payment performance continues to be monitored once modifications are made. The Company’s favorable experience regarding “re-defaults” under modified terms, or upon return of the loan to its original terms, indicates that such relief may improve ultimate collection and reduces the Company’s risk of loss.
Impaired Loans	Impaired Loans — A loan is generally considered impaired when based on current events and information it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. A loan, including a restructured loan, for which there is an insignificant delay relative to the frequency of payments due, and/or the original contractual maturity, is not considered an impaired loan. Generally, impaired loans include loans on nonaccrual status and TDRs. The Company’s policy is to record a specific valuation allowance, which is included in the allowance for loan losses, or to charge off that portion of an impaired loan that represents the impairment or shortfall amount as determined utilizing one of the three methods described in ASC 310-10-35-22. Impairment on non-collateral dependent restructured loans is measured by comparing the present value of expected future cash flows on the restructured loans discounted at the interest rate of the original loan agreement to the loan’s carrying value. The impairment amount, if any, is generally charged off and recorded against the allowance for loan losses at the time impairment is measurable and a probable loss is determined. As a result, most of the TDRs have no specific allowance allocated because, consistent with the Company’s stated practice, any impairment is typically charged off in the period in which it is identified. The Company measures impairment based on the present value of expected future cash flows discounted at the loan’s effective interest rate, except that as a practical expedient, the Company may also measure impairment based on an observable market price for the loan, or the value of the collateral, for collateral dependent loans. Impairment on collateral dependent restructured loans is measured by determining the amount by which our recorded investment in the impaired loan exceeds the fair value of the collateral less estimated selling costs. The fair value is generally determined by one or more appraisals of the collateral, performed by a Company-approved third-party independent appraiser. The majority of impaired loans that are collateral dependent are charged off down to their estimated fair value of the collateral (less selling costs) at each reporting date based on current appraised value. Appraisals of the collateral for impaired collateral dependent loans are typically ordered at the time the loan is identified as showing signs of inherent weakness. These appraisals are normally updated at least annually, or more frequently, if there are concerns or indications that the value of the collateral may have changed significantly since the previous appraisal. On an exception basis, a specific valuation allowance is recorded on collateral dependent impaired loans when a current appraisal is not yet available, a recent appraisal is still under review or on single-family residential (“SFR”) mortgage loans if the loans are currently under review for a loan modification. Such valuation allowances are generally based on previous appraisals adjusted for current market conditions, based on preliminary appraisal values that are still being reviewed or for SFR mortgage loans under review for modification on an appraisal or indications of comparable home sales from external sources. Charge-offs of unsecured consumer loans are recorded when the loan reaches 120 days past due or sooner as circumstances indicate. Except for the charge-offs of unsecured consumer loans, the charge-off policy is applied consistently across all portfolio segments. Impaired single-family mortgage loans that have been modified in accordance with the various government modification programs are also measured based on the present value of the expected cash flows discounted at the loan’s pre-modification interest rate. The Company recognizes the change in present value attributable to the passage of time as interest income on such performing SFR mortgage loans and the amount of interest income recognized to date has been insignificant.
Provision and Allowance for Loan Losses	Provision and Allowance for Loan Losses — The allowance for loan losses is management’s estimate of probable losses inherent in the loan and lease receivables portfolio. The allowance is increased by the provision for loan losses and recoveries of prior loan losses, and it is decreased by recapture of provision for loan losses and by charge-offs taken when management believes the uncollectability of any loan is confirmed. Subsequent recoveries, if any, are added to the allowance. The determination of the balance in the allowance for loan losses is based on an analysis of the loan and lease finance receivables portfolio using a systematic methodology and reflects an amount that, in management’s judgment, is appropriate to provide for probable loan losses inherent in the portfolio, after giving consideration to the character of the loan portfolio, current economic conditions, past loan loss experience, and such other factors that would deserve current recognition in estimating inherent loan losses. There are different qualitative risks for the loans in each portfolio segment. The construction and real estate segments’ predominant risk characteristic is the collateral and the geographic location of the property collateralizing the loan as well as the operating cash flow for commercial real estate properties. The commercial and industrial segment’s predominant risk characteristics are the cash flows of the businesses we lend to, the global cash flows and liquidity of the guarantors, as well as economic and market conditions. SBA 504 loans have risk characteristics that are similar to the real estate loan segment, while SBA 7(a) loans have risks that are similar to commercial and industrial loans. The dairy & livestock segment’s predominant risk characteristics are milk and beef prices in the market as well as the cost of feed and cattle. The Agribusiness segment’s predominant risk characteristics are the supply and demand conditions of the product, production seasonality, the scale of operations and ability to control costs, the availability and cost of water, and operator experience. The municipal lease segment’s predominant risk characteristics are the municipality’s general financial condition and tax revenues or if applicable the specific project related financial condition. The consumer, auto and other segment’s predominant risk characteristics are employment and income levels as they relate to consumers and cash flows of the businesses as they relate to equipment and vehicle leases to businesses. The Company’s methodology is consistently applied across all portfolio segments taking into account the applicable historical loss rates and the qualitative factors applicable to each pool of loans. A key factor in the Company’s methodology is the loan risk rating (Pass, Special Mention, Substandard, Doubtful and Loss). Loan risk ratings are updated as facts related to the loan or borrower become available. In addition, all term loans in excess of $1.0 million are subject to an annual internal credit review process where all factors underlying the loan, borrower and guarantors are subject to review which may result in changes to the loan’s risk rating. Our methodology for assessing the appropriateness of the allowance is conducted on a regular basis and considers the Bank’s overall loan portfolio. The Bank’s methodology consists of two major phases. In the first phase, individual loans are reviewed to identify loans for impairment. Impairment is measured based on the Company’s policy. If an impaired loan is determined to be a collateral dependent loan, the Company determines the fair value of the loan and if it is less than the recorded investment in the loan, the Company either recognizes an impairment as a specific allowance, or charges off the impaired balance if it determined that such amount represents a confirmed loss. For non-collateral dependent loans, the Company measures impairment based on the comparison of the loan’s carrying value to the present value of expected future cash flows discounted at the interest rate on the original loan agreement. Loans determined to be impaired are excluded from the formula allowance so as not to double count the loss exposure. The second phase is conducted by evaluating or segmenting the remainder of the loan portfolio into groups or pools of loans with similar characteristics. In this second phase, groups or pools of homogeneous loans are reviewed to determine a portfolio formula allowance. In the case of the portfolio formula allowance, homogeneous portfolios, such as small business loans, consumer loans, dairy & livestock and agribusiness loans, and real estate loans, are aggregated or pooled in determining the appropriate allowance. The Bank aggregates loans with similar risk characteristics into eight (8) segments in order to capture sufficient loss observations, and to produce more reliable historical loss rates for a given segment. The Bank’s methodology employs a look back period based on a through-the-cycle time frame beginning with the first quarter of 2009 through the fourth quarter of 2018. This time period continues to expand by one quarter until such time the current economic cycle ends, triggered by independent evidence that a recession has begun. The through-the-cycle look back period produces meaningful results that more appropriately reflect the level of incurred losses in the Bank’s loan portfolio given the current, extended credit cycle . Included in this second phase is our consideration of qualitative factors, including, all known relevant internal and external factors that may affect the collectability of a loan. This includes our estimates of the amounts necessary for concentrations, economic uncertainties, the volatility of the market value of collateral, and other relevant factors. Quantitative metrics are applied to each of the factors utilizing a comparison of current measurements to historical results within the range of the look back period. These qualitative factors are used to adjust the historical loan loss rates for each pool of loans to determine the probable loan losses inherent in the portfolio. Periodically, we assess various attributes utilized in adjusting our historical loss factors to reflect current economic conditions. The methodology is consistently applied across all the portfolio segments taking into account the applicable historical loss rates and the qualitative factors applicable to each pool of loans. Performing loans acquired through business combinations are evaluated separately by each acquired portfolio using the ALLL methodology. The results of the ALLL methodology are compared to the remaining fair value discounts by portfolio. If the remaining fair value discounts are determined to be insufficient, the allowance will be increased to reflect the additional risk in the portfolio. The ALLL methodology includes documentation, controls, validation and governance processes that ensure that the overall ALLL process is structured, transparent and repeatable. The Bank updates its ALLL methodology at least annually to ensure the relevance and reliability of key measures and assumptions that produce the allowance each quarter. Reserve for Unfunded Loan Commitments — We record a liability for probable and estimable losses associated with our unfunded loan commitments being funded and subsequently being charged off. Each quarter, every unfunded client loan commitment is allocated to a credit risk-rating in accordance with each client’s credit risk rating. We use the historical loan loss factors described under our allowance for loan losses to calculate the loan loss experience if unfunded loan commitments are funded. Separately, we use historical trends to calculate a probability of an unfunded loan commitment being funded. We apply the loan funding probability factor to risk-factor adjusted unfunded loan commitments by credit risk-rating to derive the reserve for unfunded loan commitments, similar to funded loans. The reserve for unfunded loan commitments also includes certain qualitative allocations as deemed appropriate by management. We include the reserve for unfunded loan commitments in other liabilities and the related provision in other noninterest expense.
Reserve for Unfunded Loan Commitments	We record a liability for probable and estimable losses associated with our unfunded loan commitments being funded and subsequently being charged off. Each quarter, every unfunded client loan commitment is allocated to a credit risk-rating in accordance with each client’s credit risk rating. We use the historical loan loss factors described under our allowance for loan losses to calculate the loan loss experience if unfunded loan commitments are funded. Separately, we use historical trends to calculate a probability of an unfunded loan commitment being funded. We apply the loan funding probability factor to risk-factor adjusted unfunded loan commitments by credit risk-rating to derive the reserve for unfunded loan commitments, similar to funded loans. The reserve for unfunded loan commitments also includes certain qualitative allocations as deemed appropriate by management. We include the reserve for unfunded loan commitments in other liabilities and the related provision in other noninterest expense.
Purchase Credit Impaired Loans	Purchase Credit Impaired Loans — PCI loans are those loans that we acquired in the San Joaquin Bank (“SJB”) acquisition for which we were “covered” for reimbursement for a substantial portion of any future losses under the terms of the FDIC loss sharing agreement. We account for PCI loans under ASC 310-30, Loa ns and Debt Securities Acquired with Deteriorated Credit Quality (“acquired impaired loan accounting”) when (i) we acquire loans deemed to be impaired when there is evidence of credit deterioration since their origination and it is probable at the date of acquisition that we would be unable to collect all contractually required payments and (ii) as a general policy election for non-impaired loans that we acquire in a distressed bank acquisition. Acquired impaired loans are accounted for individually or in pools of loans based on common risk characteristics. The excess of the loan’s or pool’s scheduled contractual principal and interest payments over all cash flows expected at acquisition is the nonaccretable difference. The remaining amount, representing the excess of the loan’s cash flows expected to be collected over the fair value is the accretable yield (accreted into interest income over the remaining life of the loan or pool). Refer to Note 6 — Acquired SJB Assets and FDIC Loss Sharing Asset for PCI loans by type at December 31, 2018. Provision for loan losses on the PCI portfolio will be recorded if there is deterioration in the expected cash flows on PCI loans as a result of deteriorated credit quality. Assumptions utilized in this process include projections related to probability of default, loss severity, prepayment and recovery lag. Decreases in expected cash flows on the acquired impaired loans as of the measurement date compared to previously estimated are recognized by recording a provision for loan losses on acquired impaired loans. Loans accounted for as part of a pool are measured based on the expected cash flows of the entire pool.
Other Real Estate Owned	Other Real Estate Owned
Premises and Equipment	Premises and Equipment — Premises and equipment are stated at cost, less accumulated depreciation, which is provided for in amounts sufficient to relate the cost of depreciable assets to operations over the estimated service lives of the respective asset and are computed on a straight-line basis. The ranges of useful lives of the principal classes of assets are as follows: Bank premises 15 - 39 years Leasehold improvements Shorter of estimated economic lives of 15 years or term of the lease. Computer equipment 3 - 7 years Furniture, fixtures and equipment 5 - 10 years Long-lived assets are reviewed periodically for impairment when events or changes in circumstances indicate that the carrying amount may not be recoverable. The existence of impairment is based on undiscounted cash flows. To the extent impairment exists, the impairment is calculated as the difference in fair value of assets and their carrying value. The impairment loss, if any, would be recorded in noninterest expense. Long-lived assets classified as held-for-sale are measured at the lower of its carrying amount or fair value less cost to sell. Assets-held-for sale include long-lived assets transferred from our “held-and-used” portfolio in the period in which the following criteria are met: • Management, having the authority to approve the action, commits to a plan to sell the asset; • The asset is available for immediate sale, an active program to locate a buyer and other actions required to complete the plan to sell the asset have been initiated; • The sale of the asset is probable, and transfer of the asset is expected to qualify for recognition as a completed sale, within one year; • The asset is being actively marketed for sale at a price that is reasonable in relation to its current fair value; • Actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.
Goodwill and Intangible Assets	Goodwill and Intangible Assets — Goodwill resulting from business combinations prior to January 1, 2009, represents the excess of the purchase price over the fair value of the net assets of the businesses acquired. Goodwill resulting from business combinations after January 1, 2009, is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any non-controlling interest in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but is tested for impairment at least annually, or more frequently, if events and circumstances exist that indicate that a goodwill impairment test should be performed. Intangible assets with definite useful lives are amortized over their estimated useful lives to their estimated residual values. Goodwill is the only intangible asset with an indefinite life on our balance sheets. Based on the Company’s annual impairment test, there was zero recorded impairment as of December 31, 2018. Other intangible assets consist of core deposit intangible assets arising from business combinations and are amortized using an accelerated method over their estimated useful lives.
Use of Fair Value	Use of Fair Value — We use fair value measurements to record fair value adjustments to certain financial instruments and to determine fair value disclosures. Investment securities available-for-sale and interest-rate swaps are financial instruments recorded at fair value on a recurring basis. Additionally, from time to time, we may be required to record at fair value other assets on a non-recurring basis, such as impaired loans and OREO. These non-recurring fair value adjustments typically involve application of lower-of-cost-or-market accounting or write-downs of individual assets. Further, we include in Note 20 — Fair Value Information of the consolidated financial statements information about the extent to which fair value is used to measure assets and liabilities, the valuation methodologies used and its impact to earnings. Additionally, for financial instruments not recorded at fair value we disclose the estimate of their fair value.
Bank Owned Life Insurance	Bank Owned Life Insurance — The Company invests in Bank Owned Life Insurance (“BOLI”). BOLI involves the purchasing of life insurance by the Company on a select group of employees. The Company is the owner and primary beneficiary of these policies. BOLI is recorded as an asset at the cash surrender value. Increases in the cash value of these policies, as well as insurance proceeds received, are recorded in other noninterest income and are not subject to income tax for as long as they are held for the life of the covered employee.
Income Taxes	Income Taxes — Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Future realization of deferred tax assets ultimately depends on the existence of sufficient taxable income of the appropriate character (for example, ordinary income or capital gain) within the carryback or carryforward periods available under the tax law. Based on historical and future expected taxable earnings and available strategies, the Company considers the future realization of these deferred tax assets more likely than not. The tax effects from an uncertain tax position are recognized in the financial statements only if, based on its merits, the position is more likely than not to be sustained on audit by the taxing authorities. Interest and penalties related to uncertain tax positions are recorded as part of other operating expense.
Earnings per Common Share	Earnings per Common Share — The Company calculates earnings per common share (“EPS”) using the two-class method. The two-class method requires the Company to present EPS as if all of the earnings for the period are distributed to common shareholders and any participating securities. All outstanding unvested share-based payment awards that contain rights to non-forfeitable dividends are considered participating securities. The Company grants restricted shares under the 2008 Equity Incentive Plan that qualify as participating securities. Restricted shares issued under this plan are entitled to dividends at the same rate as common stock. A reconciliation of the numerator and the denominator used in the computation of basic and diluted earnings per common share is included in Note 17 — Earnings Per Share Reconciliation of these consolidated financial statements.
Stock-Based Compensation	Stock-Based Compensation — Consistent with the provisions of ASC 718, Stock Compensation , we recognize expense for the grant date fair value of stock options and restricted shares issued to employees, officers and non-employee directors over the requisite service periods (generally the vesting period). The service periods may be subject to performance conditions. The fair value of each stock option grant is estimated as of the grant date using the Black-Scholes option-pricing model. Management assumptions used at the time of grant impact the fair value of the option calculated under the Black-Scholes option-pricing model, and ultimately, the expense that will be recognized over the life of the option. The grant date fair value of restricted stock awards is measured at the fair value of the Company’s common stock as if the restricted share was vested and issued on the date of grant. Additional information is included in Note 18 — Stock Option Plans and Restricted Stock Awards of the consolidated financial statements included herein.
Derivative Financial Instruments	Derivative Financial Instruments — All derivative instruments, including certain derivative instruments embedded in other contracts, are recognized on the consolidated balance sheets at fair value. For derivatives designated as fair value hedges, changes in the fair value of the derivative and the hedged item related to the hedged risk are recognized in earnings. Changes in fair value of derivatives designated and accounted for as cash flow hedges, to the extent they are effective as hedges, are recorded in “Other Comprehensive Income,” net of deferred taxes, and are subsequently reclassified to earnings when the hedged transaction affects earnings. Any hedge ineffectiveness would be recognized in the income statement line item pertaining to the hedged item.
Statement of Cash Flows	Statement of Cash Flows — Cash and cash equivalents, as reported in the statements of cash flows, include cash and due from banks, interest-bearing balances due from depository institutions and federal funds sold with original maturities of three months or less. Cash flows from loans and deposits are reported net.
CitizensTrust	CitizensTrust — This division provides trust, investment and brokerage related services and asset management, as well as financial planning, estate planning, retirement planning, and business succession planning services. CitizensTrust services its clients through three offices in Southern California: Pasadena, Ontario and Newport Beach. At December 31, 2018, CitizensTrust had approximately $2.54 billion in assets under management and administration, including $1.80 billion in assets under management. The amount of these funds and the related liability have not been recorded in the accompanying consolidated balance sheets because they are not assets or liabilities of the Bank or Company, with the exception of any funds held on deposit with the Bank.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements — The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. A material estimate that is particularly susceptible to significant change in the near term relates to the determination of the allowance for loan losses. Other significant estimates which may be subject to change include fair value determinations and disclosures, impairment of investments, goodwill, loans, as well as valuation of deferred tax assets.
Other Contingencies	Other Contingencies — In the ordinary course of business, the Company becomes involved in litigation. Based upon the Company’s internal records and discussions with legal counsel, the Company records accruals as appropriate, for estimates of the probable outcome of all cases brought against the Company. Except as discussed in Note 15 — Commitments and Contingencies material litigation accruals and is not aware of any material pending legal action or complaints asserted against the Company.
Adoption of New Accounting Standard and Recent Accounting Pronouncements	Adoption of New Accounting Standard Revenue Recognition In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities”, which addresses certain aspects of recognition, measurement, presentation and disclosure of financial instruments. The guidance in this ASU among other things, (i) requires equity investments with certain exceptions, to be measured at fair value with changes in fair value recognized in net income, (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) eliminates the requirement for public entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (iv) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (v) requires an entity to present separately in other comprehensive income the portion of the change in fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (vi) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or in the accompanying notes to the financial statements and (vii) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities. This amendment is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Entities are required to apply the amendment by means of a cumulative-effect adjustment as of the beginning of the fiscal year of adoption, with the exception of the amendment related to equity securities without readily determinable fair values, which should be applied prospectively to equity investments that exist as of the date of adoption. The Company adopted ASU 2016-01 effective January 1, 2018 and it did not have a material impact on the Company’s consolidated financial statements. In accordance with (iv) above, the Company measured the fair value of its loan portfolio at December 31, 2018 using an exit price notion. See Note 20 – Fair Value Information . In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments.” The new guidance clarifies the classification within the statement of cash flows for certain transactions, including debt extinguishment costs, zero-coupon debt, and contingent consideration related to business combinations, insurance proceeds, equity method distributions and beneficial interests in securitizations. The guidance also clarifies that cash flows with aspects of multiple classes of cash flows, or that cannot be separated by source or use, should be classified based on the activity that is likely to be the predominant source or use of cash flows for the item. This guidance is effective for fiscal years beginning after December 15, 2017 and will require application using a retrospective transition method. The Company adopted this ASU retrospectively effective January 1, 2018 and it did not have a material impact on the Company’s consolidated financial statements. In May 2017, the FASB issued ASU No. 2017-09, “Compensation – Stock Compensation (Topic 718): Scope of Modification Accounting.” The amendments in ASU 2017-09 provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. An entity should account for the effects of a modification unless all the following are met: (1) the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the modified award is the same as the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the modified award is the same as the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the original award immediately before the original award is modified. If the modification does not affect any of the inputs to the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification. (2) the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified. (3) the classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. The amendments in ASU No. 2017-09 are effective for annual periods, and interim within those annual reporting periods, beginning after December 15, 2017; early adoption is permitted. The amendments in this ASU should be applied prospectively to an award modified on or after the adoption date. The Company adopted this ASU and it did not have a material impact on the Company’s consolidated financial statements. In February 2018, the FASB issued ASU No. 2018-02, “Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Job Act (“Tax Reform Act”). The amendments in this update also require entities to disclose their accounting policy for releasing income tax effects from accumulated other comprehensive income. The ASU is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Early adoption is permitted, and the provisions of the amendment should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Reform Act is recognized. The Company elected to early adopt ASU 2018-02 in the first quarter of 2018 and reclassified $356,000 related to the stranded tax effects from accumulated other comprehensive income to retained earnings within our consolidated statements of stockholders’ equity. Recent Accounting Pronouncements — In February 2016, FASB issued ASU No. 2016-02, “Leases (Topic 842)”. ASU 2016-02 establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. In July 2018, the FASB issued ASU 2018-10, “Codification Improvements to Topic 842, Leases”, which clarifies and corrects errors in ASC 842. The effective date and transition requirements of ASU 2018-10 are the same as the effective date and transition requirements of 2016-02. In July 2018, the FASB issued ASU No. 2018-11, “Leases (Topic 842): Targeted Improvements”, which creates a new optional transition method for implementing the new standard on leases, ASU No. 2016-02, and provides lessors with a practical expedient for separating lease and non-lease components. Specifically, under the amendments in ASU 2018-11: (1) the transition option allows entities to not apply the new leases standard in the comparative periods presented when transitioning to the new accounting standard for leases, and (2) lessors may elect not to separate lease and non-lease components when certain conditions are met. The amendments have the same effective date as ASU 2016-02. The Company established a project to consider the impact of Topic 842. The leasing portfolio consists of real estate leases, which are used for the banking operations of the Company. All leases in the current portfolio have been classified as operating leases, although this may change in the future. Management does not anticipate a material impact to the consolidated statement of earnings. Management estimates the ROU asset and liability to be between $15 million and $20 million. This amount is based on the present value of currently-committed cash flows from leases discounted at the Company’s incremental rate of borrowing on an arms-length basis. This liability includes the non-lease components as the Company has elected to include these components as a practical expedient. In addition, there are a number of practical expedients that have been elected, which included electing not to adjust comparative financial statements at the effective date of the new accounting standard, with the effect of initially applying ASC 842 recognized as a cumulative-effect adjustment to retained earnings in the period of adoption. In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” This ASU significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The standard will replace the current “incurred loss” approach with an “expected loss” model. The new model, referred to as the Current Expected Credit Loss (“CECL”) model, will apply to: (1) financial assets subject to credit losses and measured at amortized cost, and (2) certain off-balance sheet credit exposures. This includes, but is not limited to, loans, leases, held-to-maturity securities, loan commitments, and financial guarantees. The CECL model does not apply to AFS debt securities. For AFS debt securities with unrealized losses, entities will measure credit impairment in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. As a result, entities will recognize improvements to estimated credit losses immediately in earnings rather than as interest income over time, as they do today. ASU No. 2016-13 is effective for interim and annual reporting periods beginning after December 15, 2019. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (i.e., modified retrospective approach). The Company is currently evaluating the impact of adoption of this ASU on its consolidated financial statements. A cross-functional team, consisting of finance, credit management, and information technology is currently developing the allowance methodology, models and assumptions that will be used under the new life of loan methodology. In determining the appropriate methodology, the Company has reviewed portfolio segmentation, data quality and availability. The Company will continue to review and update assumptions and models, as appropriate. In January 2017, the FASB issued ASU No. 2017-04, “Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.” ASU 2017-04 eliminates the second step in the goodwill impairment test which requires an entity to determine the implied fair value of the reporting unit’s goodwill. Instead, an entity should recognize an impairment loss if the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, with the impairment loss not to exceed the amount of goodwill allocated to the reporting unit. The standard will be effective for the Company beginning January 1, 2020, with early adoption permitted for goodwill impairment tests performed after January 1, 2017. The Company does not expect this ASU to have a material impact on the Company’s consolidated financial statements. In August 2017, the FASB issued ASU No. 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.” ASU 2017-12 changes the recognition and presentation requirements of hedge accounting and makes certain targeted improvements to simplify the application of the hedge accounting guidance in current GAAP. The amendments in this ASU better align an entity’s financial reporting and risk management activities for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. To meet that objective, the amendments expand and refine hedge accounting for both non-financial and financial risk components and align the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. ASU No. 2017-12 is effective for interim and annual reporting periods beginning after December 15, 2018; early adoption is permitted. The Company currently does not designate any derivative financial instruments as qualifying hedging relationships, and therefore, does not utilize hedge accounting. The Company does not expect this ASU to have a material impact on the Company’s consolidated financial statements. In June 2018, the FASB issued ASU No. 2018-07, “Compensation – Stock Compensation (Topic 718): Improvements to Nonemployees Share-Based Accounting.” The intention of ASU 2018-07 is to expand the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. These share-based payments will now be measured at grant-date fair value of the equity instrument issued. Upon adoption, only liability-classified awards that have not been settled and equity-classified awards for which a measurement date has not been established should be re-measured through a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. ASU 2018-07 is effective for fiscal years beginning after December 15, 2019 and is applied retrospectively. The Company does not expect this ASU to have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU eliminates, adds and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU No. 2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. Entities may early adopt any eliminated or modified disclosure requirements and delay adoption of the additional disclosure requirements until their effective date. The Company does not expect this ASU to have a material impact on the Company’s consolidated financial statements.
Fair Value Hierarchy	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 December 31 , 2018 . 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 There were no transfers in and out of Level 1 and Level 2 during the years ended December 31 , 2018 and 2017. 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 for the periods presented.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Useful Lives of Principal Classes of Assets	The ranges of useful lives of the principal classes of assets are as follows: Bank premises 15 - 39 years Leasehold improvements Shorter of estimated economic lives of 15 years or term of the lease. Computer equipment 3 - 7 years Furniture, fixtures and equipment 5 - 10 years

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The table below summarizes the amounts recognized for the estimated fair value of assets acquired and the liabilities assumed as of the acquisition date. August 10, 2018 (Dollars in thousands) Merger Consideration Cash paid $ 180,719 CVBF common stock issued 722,767 Total merger consideration $ 903,486 Identifiable net assets acquired, at fair value Assets Acquired Cash and cash equivalents 47,802 Investment securities 716,996 FHLB stock 17,250 Loans 2,734,081 Accrued interest receivable 7,916 Premises and equipment 14,632 BOLI 70,904 Core deposit intangible 52,200 Other assets 54,479 Total assets acquired 3,716,260 Liabilities assumed Deposits 2,869,986 FHLB advances 297,571 Other borrowings 166,000 Other liabilities 29,192 Total liabilities assumed 3,362,749 Total fair value of identifiable net assets, at fair value 353,511 Goodwill $ 549,975
Business Acquisition, Pro Forma Information [Table Text Block]	As a result, actual amounts would have differed from the unaudited pro forma information presented. Unaudited Pro Forma Year Ended December 31, 2018 2017 (Dollars in thousands, except per share amounts) Total revenues (net interest income plus noninterest income) $ 488,620 $ 477,235 Net Income $ 181,433 $ 139,129 Earnings per share - basic $ 1.30 $ 1.00 Earnings per share - diluted $ 1.29 $ 0.99

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Estimated Fair Value of Investment Securities	The amortized cost and estimated fair value of investment securities are summarized below. The majority of securities held are available-for-sale securities with fair value based on quoted prices for similar assets in active markets or quoted prices for identical assets in markets that are not active. Estimated fair values were obtained from an independent pricing service based upon market quotes. December 31, 2018 Amortized Cost Gross Unrealized Holding Gain Gross Unrealized Holding Loss Fair Value Total Percent (Dollars in thousands) Investment securities available-for-sale: Residential mortgage-backed securities $ 1,494,106 $ 1,348 $ (20,946 ) $ 1,474,508 85.03 % CMO/REMIC - residential 217,223 353 (3,525 ) 214,051 12.34 % Municipal bonds 45,621 332 (1,143 ) 44,810 2.59 % Other securities 716 - - 716 0.04 % Total available-for-sale securities $ 1,757,666 $ 2,033 $ (25,614 ) $ 1,734,085 100.00 % Investment securities held-to-maturity: Government agency/GSE $ 138,274 $ 572 $ (2,622 ) $ 136,224 18.57 % Residential mortgage-backed securities 153,874 - (3,140 ) 150,734 20.67 % CMO 215,336 - (12,081 ) 203,255 28.93 % Municipal bonds 236,956 556 (6,188 ) 231,324 31.83 % Total held-to-maturity securities $ 744,440 $ 1,128 $ (24,031 ) $ 721,537 100.00 % December 31, 2017 Amortized Cost Gross Unrealized Holding Gain Gross Unrealized Holding Loss Fair Value Total Percent (Dollars in thousands) Investment securities available-for-sale: Residential mortgage-backed securities $ 1,747,780 $ 11,231 $ (8,102 ) $ 1,750,909 84.14 % CMO/REMIC - residential 274,634 1,277 (2,082 ) 273,829 13.16 % Municipal bonds 54,966 774 (244 ) 55,496 2.66 % Other securities 751 - - 751 0.04 % Total available-for-sale securities $ 2,078,131 $ 13,282 $ (10,428 ) $ 2,080,985 100.00 % Investment securities held-to-maturity: Government agency/GSE $ 159,716 $ 854 $ (2,134 ) $ 158,436 19.25 % Residential mortgage-backed securities 176,427 667 (382 ) 176,712 21.26 % CMO 225,072 - (8,641 ) 216,431 27.12 % Municipal bonds 268,675 2,751 (3,790 ) 267,636 32.37 % Total held-to-maturity securities $ 829,890 $ 4,272 $ (14,947 ) $ 819,215 100.00 %
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. For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Investment securities available-for-sale: Taxable $ 44,423 $ 47,596 $ 43,538 Tax-advantaged 1,565 2,182 4,164 Total interest income from available-for-sale securities 45,988 49,778 47,702 Investment securities held-to-maturity: Taxable 11,848 12,558 10,183 Tax-advantaged 7,053 8,457 10,044 Total interest income from held-to-maturity securities 18,901 21,015 20,227 Total interest income from investment securities $ 64,889 $ 70,793 $ 67,929
Summary of Continuous Unrealized Loss Position of Securities	The tables below show 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, 2018 and 2017. Management has reviewed individual securities to determine whether a decline in fair value below the amortized cost basis is other-than-temporary. The unrealized losses on these securities were primarily attributed to changes in interest rates. The issuers of these securities have not, to our knowledge, evidenced any cause for default on these securities. These securities have fluctuated in value since their purchase dates as market rates have fluctuated. However, we have the ability and the intention to hold these securities until their fair values recover to cost or maturity. As such, management does not deem these securities to be OTTI. December 31, 2018 Less Than 12 Months 12 Months or Longer Total Fair Value Gross Unrealized Holding Losses Fair Value Gross Unrealized Holding Losses Fair Value Gross Unrealized Holding Losses (Dollars in thousands) Investment securities available-for-sale: Residential mortgage-backed securities $ 692,311 $ (4,864 ) $ 593,367 $ (16,082 ) $ 1,285,678 $ (20,946 ) CMO/REMIC - residential 36,582 (365 ) 135,062 (3,160 ) 171,644 (3,525 ) Municipal bonds 9,568 (188 ) 14,181 (955 ) 23,749 (1,143 ) Total available-for-sale securities $ 738,461 $ (5,417 ) $ 742,610 $ (20,197 ) $ 1,481,071 $ (25,614 ) Investment securities held-to-maturity: Government agency/GSE $ 7,479 $ (15 ) $ 54,944 $ (2,607 ) $ 62,423 $ (2,622 ) Residential mortgage-backed securities 59,871 (484 ) 90,863 (2,656 ) 150,734 (3,140 ) CMO - - 203,254 (12,081 ) 203,254 (12,081 ) Municipal bonds 70,989 (778 ) 77,723 (5,410 ) 148,712 (6,188 ) Total held-to-maturity securities $ 138,339 $ (1,277 ) $ 426,784 $ (22,754 ) $ 565,123 $ (24,031 ) December 31, 2017 Less Than 12 Months 12 Months or Longer Total Fair Value Gross Unrealized Holding Losses Fair Value Gross Unrealized Holding Losses Fair Value Gross Unrealized Holding Losses (Dollars in thousands) Investment securities available-for-sale: Residential mortgage-backed securities $ 414,091 $ (1,828 ) $ 303,746 $ (6,274 ) $ 717,837 $ (8,102 ) CMO/REMIC - residential 95,137 (487 ) 71,223 (1,595 ) 166,360 (2,082 ) Municipal bonds 946 (4 ) 13,956 (240 ) 14,902 (244 ) Total available-for-sale securities $ 510,174 $ (2,319 ) $ 388,925 $ (8,109 ) $ 899,099 $ (10,428 ) Investment securities held-to-maturity: Government agency/GSE $ 18,950 $ (27 ) $ 43,495 $ (2,107 ) $ 62,445 $ (2,134 ) Residential mortgage-backed securities 51,297 (188 ) 55,306 (194 ) 106,603 (382 ) CMO - - 216,431 (8,641 ) 216,431 (8,641 ) Municipal bonds 32,069 (492 ) 66,217 (3,298 ) 98,286 (3,790 ) Total held-to-maturity securities $ 102,316 $ (707 ) $ 381,449 $ (14,240 ) $ 483,765 $ (14,947 )
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. December 31, 2018 Available-for-sale Held-to-maturity Amortized Cost Fair Value Amortized Cost Fair Value (Dollars in thousands) Due in one year or less $ 13,907 $ 14,069 $ 500 $ 508 Due after one year through five years 1,574,638 1,554,686 288,967 276,693 Due after five years through ten years 143,258 140,500 197,061 193,389 Due after ten years 25,863 24,830 257,912 250,947 Total investment securities $ 1,757,666 $ 1,734,085 $ 744,440 $ 721,537

Acquired SJB Assets and FDIC _2

Acquired SJB Assets and FDIC Loss Sharing Asset (Tables)	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Summary of PCI Loans and Lease Finance Receivables	The following table provides a summary of PCI loans and lease finance receivables by type and by internal risk ratings (credit quality indicators) for the periods presented. December 31 2018 2017 (Dollars in thousands) Commercial and industrial $ 519 $ 934 SBA 1,258 1,383 Real estate: Commercial real estate 14,407 27,431 Construction - - SFR mortgage 145 162 Dairy & livestock and agribusiness 700 770 Municipal lease finance receivables - - Consumer and other loans 185 228 Gross PCI loans 17,214 30,908 Less: Purchase accounting discount - (2,026 ) Gross PCI loans, net of discount 17,214 28,882 Less: Allowance for PCI loan losses (204 ) (367 ) Net PCI loans $ 17,010 $ 28,515
Summary of Gross PCI Loans by Internal Risk Ratings by Loans	The following table summarizes gross PCI loans by internal risk ratings for the periods presented. December 31, 2018 2017 (Dollars in thousands) Pass $ 15,816 $ 26,439 Special mention 1,174 1,088 Substandard 224 3,381 Doubtful & loss - - Total gross PCI loans $ 17,214 $ 30,908
Summary of Activity Related to FDIC Loss Sharing Liability	The following table summarizes the activity related to the FDIC loss sharing liability for the periods presented. For the Year Ended December 31, 2018 2017 (Dollars in thousands) Balance, beginning of period $ (107 ) $ (502 ) FDIC share of recoveries, net of charge-offs - - Cash paid to FDIC, net 64 519 Other 43 (124 ) Balance, end of period $ - $ (107 )

Loans and Lease Finance Recei_2

Loans and Lease Finance Receivables and Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Summary of Components of Loans and Lease Finance Receivables, Excluding PCI Loans	December 31 2018 2017 (Dollars in thousands) Commercial and industrial $ 1,002,209 $ 513,325 SBA 350,043 122,055 Real estate: Commercial real estate 5,394,229 3,376,713 Construction 122,782 77,982 SFR mortgage 296,504 236,202 Dairy & livestock and agribusiness 393,843 347,289 Municipal lease finance receivables 64,186 70,243 Consumer and other loans 128,429 64,229 Gross loans, excluding PCI loans 7,752,225 4,808,038 Less: Deferred loan fees, net (4,828 ) (6,289 ) Gross loans, excluding PCI loans, net of deferred loan fees 7,747,397 4,801,749 Less: Allowance for loan losses (63,409 ) (59,218 ) Net loans, excluding PCI loans 7,683,988 4,742,531 PCI Loans 17,214 30,908 Discount on PCI loans - (2,026 ) Less: Allowance for loan losses (204 ) (367 ) PCI loans, net 17,010 28,515 Total loans and lease finance receivables $ 7,700,998 $ 4,771,046
Summary of Loan, Excluding PCI Loans by Internal Risk Ratings	December 31, 2018 Pass Special Mention Substandard (1) Doubtful & Loss Total (Dollars in thousands) Commercial and industrial $ 961,909 $ 29,358 $ 10,942 $ - $ 1,002,209 SBA 336,033 7,375 6,635 - 350,043 Real estate: Commercial real estate Owner occupied 2,008,169 95,841 13,980 - 2,117,990 Non-owner occupied 3,260,822 9,938 5,479 - 3,276,239 Construction Speculative 118,233 - - - 118,233 Non-speculative 4,549 - - - 4,549 SFR mortgage 289,607 3,310 3,587 - 296,504 Dairy & livestock and agribusiness 350,044 34,586 9,213 - 393,843 Municipal lease finance receivables 63,650 536 - - 64,186 Consumer and other loans 126,085 1,263 1,081 - 128,429 Total gross loans, excluding PCI loans $ 7,519,101 $ 182,207 $ 50,917 $ - $ 7,752,225 (1) Includes $ 19.0 million of classified loans acquired from CB in the third quarter of 2018 . December 31, 2017 Pass Special Mention Substandard Doubtful & Loss Total (Dollars in thousands) Commercial and industrial $ 483,641 $ 19,566 $ 10,118 $ - $ 513,325 SBA 112,835 5,358 3,862 - 122,055 Real estate: Commercial real estate Owner occupied 1,009,199 76,111 10,970 - 1,096,280 Non-owner occupied 2,257,130 16,434 6,869 - 2,280,433 Construction Speculative 60,042 - - - 60,042 Non-speculative 17,940 - - - 17,940 SFR mortgage 229,032 3,124 4,046 - 236,202 Dairy & livestock and agribusiness 321,413 9,047 16,829 - 347,289 Municipal lease finance receivables 69,644 599 - - 70,243 Consumer and other loans 61,715 1,255 1,259 - 64,229 Total gross loans, excluding PCI loans $ 4,622,591 $ 131,494 $ 53,953 $ - $ 4,808,038
Schedule of Balance and Activity Related to Allowance for Loan Losses for Held-for-Investment Loans by Type	For the Year Ended December 31, 2018 Ending Balance December 31, 2017 Charge-offs Recoveries Provision for (Recapture of) Loan Losses Ending Balance December 31, 2018 (Dollars in thousands) Commercial and industrial $ 7,280 $ (10 ) $ 82 $ 168 $ 7,520 SBA 869 (257 ) 20 430 1,062 Real estate: Commercial real estate 41,722 - - 3,212 44,934 Construction 984 - 2,506 (2,509 ) 981 SFR mortgage 2,112 (13 ) 51 46 2,196 Dairy & livestock and agribusiness 4,647 - 19 549 5,215 Municipal lease finance receivables 851 - - (76 ) 775 Consumer and other loans 753 (11 ) 141 (157 ) 726 PCI loans 367 - - (163 ) 204 Total allowance for loan losses $ 59,585 $ (291 ) $ 2,819 $ 1,500 $ 63,613 For the Year Ended December 31, 2017 Ending Balance December 31, 2016 Charge-offs Recoveries (Recapture of) Provision for Loan Losses Ending Balance December 31, 2017 (Dollars in thousands) Commercial and industrial $ 8,154 $ (138 ) $ 118 $ (854 ) $ 7,280 SBA 871 - 78 (80 ) 869 Real estate: Commercial real estate 37,443 - 154 4,125 41,722 Construction 1,096 - 6,036 (6,148 ) 984 SFR mortgage 2,287 - 212 (387 ) 2,112 Dairy & livestock and agribusiness 8,541 - 19 (3,913 ) 4,647 Municipal lease finance receivables 941 - - (90 ) 851 Consumer and other loans 988 (13 ) 79 (301 ) 753 PCI loans 1,219 - - (852 ) 367 Total allowance for loan losses $ 61,540 $ (151 ) $ 6,696 $ (8,500 ) $ 59,585 For the Y ear Ended December 31, 2016 Ending Balance Charge-offs Recoveries (Recapture Ending Balance (Dollars in thousands) Commercial and industrial $ 8,588 $ (120 ) $ 630 $ (944 ) $ 8,154 SBA 993 — 40 (162 ) 871 Real estate: Commercial real estate 36,995 — 792 (344 ) 37,443 Construction 2,389 — 7,174 (8,467 ) 1,096 SFR mortgage 2,103 (102 ) — 286 2,287 Dairy & livestock and agribusiness 6,029 — 216 2,296 8,541 Municipal lease finance receivables 1,153 — — (212 ) 941 Consumer and other loans 906 (16 ) 170 (72 ) 988 PCI loans — — — 1,219 1,219 Total allowance for loan losses $ 59,156 $ (238 ) $ 9,022 $ (6,400 ) $ 61,540
Schedule of Recorded Investment in Loans Held-for-Investment and Related Allowance for Loan Losses by Loan Type	The following tables present the recorded investment in loans held-for-investment and the related allowance for loan losses by loan type, based on the Company’s methodology for determining the allowance for loan losses for the periods presented. Acquired loans are also supported by a credit discount established through the determination of fair value for the acquired loan portfolio. December 31, 2018 Recorded Investment in Loans Allowance for Loan Losses Individually Collectively Acquired with Deterioriated Credit Quality Individually Collectively Acquired with Deterioriated Credit Quality (Dollars in thousands) Commercial and industrial $ 7,625 $ 994,584 $ — $ 3 $ 7,517 $ — SBA 3,467 346,576 — — 1,062 — Real estate: Commercial real estate 6,540 5,387,689 — 478 44,456 — Construction — 122,782 — — 981 — SFR mortgage 5,349 291,155 — — 2,196 — Dairy & livestock and agribusiness 78 393,765 — 12 5,203 — Municipal lease finance receivables — 64,186 — — 775 — Consumer and other loans 486 127,943 — 68 658 — PCI loans — — 17,214 — — 204 Total $ 23,545 $ 7,728,680 $ 17,214 $ 561 $ 62,848 $ 204 December 31, 2017 Recorded Investment in Loans Allowance for Loan Losses Individually Collectively Acquired with Deterioriated Credit Quality Individually Collectively Acquired with Deterioriated Credit Quality (Dollars in thousands) Commercial and industrial $ 440 $ 512,885 $ — $ — $ 7,280 $ — SBA 1,531 120,524 — 1 868 — Real estate: Commercial real estate 8,133 3,368,580 — — 41,722 — Construction — 77,982 — — 984 — SFR mortgage 4,040 232,162 — — 2,112 — Dairy & livestock and agribusiness 829 346,460 — — 4,647 — Municipal lease finance receivables — 70,243 — — 851 — Consumer and other loans 552 63,677 — 74 679 — PCI loans — — 28,882 — — 367 Total $ 15,525 $ 4,792,513 $ 28,882 $ 75 $ 59,143 $ 367
Schedule of Recorded Investment in, and Aging of, Past Due and Nonaccrual Loans, Excluding PCI Loans by Class of Loans	The following tables present the recorded investment in, and the aging of, past due and nonaccrual loans, excluding PCI loans, by type of loans for the periods presented. December 31, 2018 30-59 60 - 89 Total Past Due Nonaccrual (1) (3) Current Total Loans (Dollars in thousands) Commercial and industrial $ 820 $ 89 $ 909 $ 7,490 $ 993,810 $ 1,002,209 SBA 1,172 135 1,307 2,892 345,844 350,043 Real estate: Commercial real estate Owner occupied 2,439 350 2,789 589 2,114,612 2,117,990 Non-owner occupied — — — 5,479 3,270,760 3,276,239 Construction Speculative (2) — — — — 118,233 118,233 Non-speculative — — — — 4,549 4,549 SFR mortgage — 285 285 2,937 293,282 296,504 Dairy & livestock and agribusiness — — — 78 393,765 393,843 Municipal lease finance receivables — — — — 64,186 64,186 Consumer and other loans — — — 486 127,943 128,429 Total gross loans, excluding PCI loans $ 4,431 $ 859 $ 5,290 $ 19,951 $ 7,726,984 $ 7,752,225 (1) As of December 31, 2018, $2.3 million of nonaccruing loans were current, $33,000 were 30-59 days past due, $57,000 were 60-89 days past due and $17.6 million were 90+ days past due. (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. (3) Includes $12.3 million of nonaccrual loans acquired from CB in the third quarter of 2018. December 31, 2017 30-59 60-89 Total Past Nonaccrual Current Total Loans (Dollars in thousands) Commercial and industrial $ 768 $ — $ 768 $ 250 $ 512,307 $ 513,325 SBA 403 — 403 906 120,746 122,055 Real estate: Commercial real estate Owner occupied — — — 4,365 1,091,915 1,096,280 Non-owner occupied — — — 2,477 2,277,956 2,280,433 Construction Speculative (2) — — — — 60,042 60,042 Non-speculative — — — — 17,940 17,940 SFR mortgage — — — 1,337 234,865 236,202 Dairy & livestock and agribusiness — — — 829 346,460 347,289 Municipal lease finance receivables — — — — 70,243 70,243 Consumer and other loans 1 — 1 552 63,676 64,229 Total gross loans, excluding PCI loans $ 1,172 $ — $ 1,172 $ 10,716 $ 4,796,150 $ 4,808,038 (1) As of December 31, 2017, $3.6 million of nonaccruing loans were current, $ 376 (2) Speculative construction loans are generally for properties where there is no identified buyer or renter.
Schedule of Held-for-Investment Loans, Excluding PCI Loans, Individually Evaluated for Impairment by Class of Loans	The following tables present information for held-for-investment loans, excluding PCI loans, individually evaluated for impairment by type of loans, as and for the periods presented. As of and For the Year Ended December 31, 2018 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 7,436 $ 11,457 $ — $ 7,718 $ 7 SBA 3,467 5,746 — 3,919 44 Real estate: Commercial real estate Owner occupied 589 705 — 624 — Non-owner occupied 2,808 4,324 — 4,585 32 Construction Speculative — — — — — Non-speculative — — — — — SFR mortgage 5,349 6,270 — 5,484 80 Dairy & livestock and agribusiness — — — — — Municipal lease finance receivables — — — — — Consumer and other loans 418 526 — 459 — Total 20,067 29,028 — 22,789 163 With a related allowance recorded: Commercial and industrial 189 191 3 203 — SBA — — — — — Real estate: Commercial real estate Owner occupied — — — — — Non-owner occupied 3,143 3,144 478 3,144 — Construction Speculative — — — — — Non-speculative — — — — — SFR mortgage — — — — — Dairy & livestock and agribusiness 78 78 12 78 — Municipal lease finance receivables — — — — — Consumer and other loans 68 100 68 76 — Total 3,478 3,513 561 3,501 — Total impaired loans $ 23,545 $ 32,541 $ 561 $ 26,290 $ 163 As of and For the Year Ended December 31, 2017 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 440 $ 980 $ — $ 548 $ 10 SBA 1,530 1,699 — 1,598 47 Real estate: Commercial real estate Owner occupied 4,365 4,763 — 4,414 36 Non-owner occupied 3,768 5,107 — 3,951 94 Construction Speculative — — — — — Non-speculative — — — — — SFR mortgage 4,040 4,692 — 4,119 118 Dairy & livestock and agribusiness 829 1,091 — 988 1 Municipal lease finance receivables — — — — — Consumer and other loans 174 370 — 202 — Total 15,146 18,702 — 15,820 306 With a related allowance recorded: Commercial and industrial — — — — — SBA 1 18 1 6 — 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 378 391 74 385 — Total 379 409 75 391 — Total impaired loans $ 15,525 $ 19,111 $ 75 $ 16,211 $ 306 As of and For the Year Ended December 31, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 730 $ 1,646 $ — $ 832 $ 26 SBA 3,386 4,189 — 3,709 50 Real estate: Commercial real estate Owner occupied 1,797 2,276 — 1,410 70 Non-owner occupied 13,331 15,842 — 13,517 592 Construction Speculative — — — — — Non-speculative — — — — — SFR mortgage 5,174 6,075 — 5,327 135 Dairy & livestock and agribusiness 747 747 — 692 47 Municipal lease finance receivables — — — — — Consumer and other loans 853 1,423 — 919 18 Total 26,018 32,198 — 26,406 938 With a related allowance recorded: Commercial and industrial 171 171 114 233 9 SBA 196 212 27 206 14 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 367 383 141 439 23 Total impaired loans $ 26,385 $ 32,581 $ 141 $ 26,845 $ 961
Summary of Activity Related to Troubled Debt Restructurings	The following table provides a summary of the activity related to TDRs for the periods presented. For the Year Ended December 31, 2018 2017 (Dollars in thousands) Performing TDRs: Beginning balance $ 4,809 $ 19,233 New modifications 311 3,143 Payoffs/payments, net and other (1,526 ) (14,752 ) TDRs returned to accrual status - 329 TDRs placed on nonaccrual status - (3,144 ) Ending balance $ 3,594 $ 4,809 Nonperforming TDRs: Beginning balance $ 4,200 $ 1,626 New modifications 316 2,066 Charge-offs - - Payoffs/payments, net and other (1,007 ) (2,307 ) TDRs returned to accrual status - (329 ) TDRs placed on nonaccrual status - 3,144 Ending balance $ 3,509 $ 4,200 Total TDRs $ 7,103 $ 9,009
Summary of Loans Modified as Troubled Debt Restructurings	The following tables summarize loans modified as troubled debt restructurings for the periods presented. Modifications (1) For the Year Ended December 31, 2018 Number Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity 1 38 38 20 - Real estate: Commercial real estate: Owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Non-owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - SFR mortgage: Interest rate reduction - - - - - Change in amortization period or maturity 1 311 311 300 - Dairy & livestock and agribusiness: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity 1 278 278 267 - Total loans 3 $ 627 $ 627 $ 587 $ - For the Year Ended December 31, 2017 Number Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity - - - - - Real estate: Commercial real estate: Owner occupied Interest rate reduction - - - - - Change in amortization period or maturity 1 3,143 3,143 3,143 - Non-owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - SFR mortgage: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Dairy & livestock and agribusiness: Interest rate reduction - - - - - Change in amortization period or maturity 1 1,984 1,984 78 - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Total loans 2 $ 5,127 $ 5,127 $ 3,221 $ - For the Year Ended December 31, 2016 Number Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction 1 $ 112 $ 112 $ 103 $ - Change in amortization period or maturity - - - - - SBA: Interest rate reduction - - - - - Change in amortization period or maturity 2 214 214 196 28 Real estate: Commercial real estate: Owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Non-owner occupied Interest rate reduction 1 759 759 756 - Change in amortization period or maturity - - - - - Dairy & livestock and agribusiness: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - SFR mortgage: Interest rate reduction - - - - - Change in amortization period or maturity 3 201 201 185 - Total loans 7 $ 1,286 $ 1,286 $ 1,240 $ 28 (1) The tables above exclude modified loans that were paid off prior to the end of the period. (2) Financial effects resulting from modifications represent charge-offs and specific allowance recorded at modification date.

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Summary of Activity Related to Total OREO	The following table summarizes the activity related to total OREO for the periods presented. For the Year Ended December 31, 2018 2017 (Dollars in thousands) Balance, beginning of period $ 4,527 $ 4,527 Additions 420 — Dispositions (4,527 ) — Valuation adjustments — — Balance, end of period $ 420 $ 4,527

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	The following table presents the changes in the carrying amount of goodwill for the periods presented. As of and for the Year Ended December 31, 2018 2017 (Dollars in thousands) Balance, beginning of period $ 116,564 $ 89,533 Additions due to acquisitions 549,975 27,031 Balance, end of period $ 666,539 $ 116,564
Summary of Amortizable Intangible Assets	The following summarizes activity of amortizable core deposit intangible (“CDI”) assets for the periods presented. As of and For the Year Ended December 31, 2018 2017 Gross CDI Amount Accumulated Amortization Net CDI Amount Gross CDI Amount Accumulated Amortization Net CDI Amount (Dollars in thousands) Balance of intangible assets, beginning of period $ 41,097 $ (34,259 ) $ 6,838 $ 37,940 $ (32,930 ) $ 5,010 Additions due to acquisitions 52,200 3,157 Balance of intangible assets, end of period $ 93,297 $ (39,513 ) $ 53,784 $ 41,097 $ (34,259 ) $ 6,838 Aggregate amortization expense: For year ended December 31, $ 5,254 $ 1,329 Estimated Amortization Expense: For the year ending December 31, 2019 10,798 For the year ending December 31, 2020 9,352 For the year ending December 31, 2021 8,240 For the year ending December 31, 2022 7,126 Thereafter 18,268

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Schedule of Premises and Equipment	Premises and equipment were comprised of the following for the periods presented. As of December 31, 2018 2017 (Dollars in thousands) Land $ 19,929 $ 14,489 Bank premises 73,188 65,215 Furniture and equipment 29,020 25,610 Premises and equipment, gross 122,137 105,314 Accumulated depreciation and amortization (63,944 ) (59,148 ) Premises and equipment, net $ 58,193 $ 46,166
Future Minimum Annual Rental Payments for Noncancelable Leases	The future minimum annual rental payments required for leases that have initial or remaining noncancelable lease terms in excess of one year as of December 31, 2018, excluding property taxes and insurance, are as follows: As of December 31, 2018 Year: (Dollars in thousands) 2019 $ 9,261 2020 5,918 2021 4,077 2022 2,819 2023 1,179 Thereafter 1,707 Total $ 24,961

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Summary of Other Assets	Other assets were comprised of the following for the periods presented. As of December 31, 2018 2017 (Dollars in thousands) Prepaid expenses $ 6,393 $ 4,538 Interest rate swaps 1,938 3,211 Affordable housing investments 15,995 5,977 Other investments 33,031 801 Other assets 10,450 10,790 Total $ 67,807 $ 25,317

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense	The current and deferred amounts of income tax expense consist of the following. For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Current provision: Federal $ 31,055 $ 44,153 $ 41,195 State 20,546 17,151 17,944 51,601 61,304 59,139 Deferred provision: Federal 5,158 20,926 1,208 State 2,353 2,154 510 7,511 23,080 1,718 Total $ 59,112 $ 84,384 $ 60,857
Schedule of Income Tax Asset	Income tax asset consists of the following. As of December 31, 2018 2017 (Dollars in thousands) Current: Federal $ 12,303 $ 11,713 State 6,800 2,946 19,103 14,659 Deferred: Federal 27,334 16,557 State 15,737 8,830 43,071 25,387 Total $ 62,174 $ 40,046
Components of Net Deferred Tax Asset	Temporary differences between the amounts reported in the financial statements and the tax bases of assets and liabilities resulted in deferred taxes. The components of the net deferred tax asset are as follows. As of December 31, 2018 2017 (Dollars in thousands) Deferred tax assets: Bad debt and credit loss deduction $ 22,402 $ 19,911 Net operating loss carryforward 141 207 Deferred compensation 6,109 5,501 PCI loans 2,556 3,098 California franchise tax 837 1,618 Accrued expense 4,865 1,365 Unrealized loss on investment securities, net 7,508 - Acquired loan discounts 25,555 2,081 Other, net 2,624 1,272 Gross deferred tax asset 72,597 35,053 Deferred tax liabilities: Depreciation 4,440 975 Intangibles - acquistions 19,843 3,404 FHLB Stock 2,527 2,400 Deferred income 2,716 2,112 Unrealized gain on investment securities, net - 775 Gross deferred tax liability 29,526 9,666 Net deferred tax asset $ 43,071 $ 25,387
Reconciliation of Statutory Income Tax Rate to Consolidated Effective Income Tax Rate	The annual consolidated effective tax rate for the periods presented, is reconciled to the U.S. statutory income rate as follows. For the Year Ended December 31, 2018 2017 2016 Amount Percent Amount Percent Amount Percent (Dollars in thousands) Federal income tax at statutory rate $ 44,334 21.0 % $ 66,078 35.0 % $ 56,800 35.0 % State franchise taxes, net of federal benefit 17,905 8.5 % 12,903 6.9 % 11,299 7.0 % Tax-exempt income (2,991 ) -1.4 % (4,450 ) -2.4 % (5,848 ) -3.6 % Tax credits (1,451 ) -0.7 % (1,096 ) -0.6 % (846 ) -0.5 % Deferred tax asset revaluation adjustment - - 13,208 7.0 % - - Other, net 1,315 0.6 % (2,259 ) -1.2 % (548 ) -0.4 % Provision for income taxes $ 59,112 28.0 % $ 84,384 44.7 % $ 60,857 37.5 %

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Composition of Deposits	The composition of deposits is summarized for the periods presented in the table below. As of December 31, 2018 2017 Amount Percent Amount Percent (Dollars in thousands) Noninterest-bearing deposits $ 5,204,787 58.96 % $ 3,846,436 58.75 % Interest-bearing deposits: Investment checking 460,972 5.22 % 433,971 6.63 % Money market 2,236,018 25.33 % 1,517,050 23.17 % Savings 393,769 4.46 % 364,049 5.56 % Time deposits 531,944 6.03 % 385,347 5.89 % Total deposits $ 8,827,490 100.00 % $ 6,546,853 100.00 %
Scheduled Maturities of Time Certificates of Deposit	At December , , the scheduled maturities of time certificates of deposit are as follows. December 31, 2018 Year of maturity: (Dollars in thousands) 2019 $ 398,735 2020 70,898 2021 46,710 2022 5,320 2023 and thereafter 10,281 Total $ 531,944

Earnings Per Share Reconcilia_2

Earnings Per Share Reconciliation (Tables)	12 Months Ended
	Dec. 31, 2018
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. For the Year Ended December 31, 2018 2017 2016 (In thousands, except per share amounts) Earnings per common share: Net earnings $ 152,003 $ 104,411 $ 101,429 Less: Net earnings allocated to restricted stock 429 382 421 Net earnings allocated to common shareholders $ 151,574 $ 104,029 $ 101,008 Weighted average shares outstanding 121,670 109,409 107,282 Basic earnings per common share $ 1.25 $ 0.95 $ 0.94 Diluted earnings per common share: Net income allocated to common shareholders $ 151,574 $ 104,029 $ 101,008 Weighted average shares outstanding 121,670 109,409 107,282 Incremental shares from assumed exercise of outstanding options 287 398 405 Diluted weighted average shares outstanding 121,957 109,807 107,687 Diluted earnings per common share $ 1.24 $ 0.95 $ 0.94

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Estimated Fair Value of Stock Options	The fair value of each stock option granted in 2018 , 2017 and 2016 , was estimated on the date of grant using the following weighted-average assumptions. For the Year Ended December 31, 2018 2017 2016 Dividend yield 2.4% 2.2% 2.9% Volatility 25.4% 29.6% 33.1% Risk-free interest rate 2.9% 1.8% 1.2% Expected life 5.4 years 5.6 years 5.6 years Weighted average grant date fair value $ 5.08 $ 5.17 $ 3.96
Option Activity under Company's Stock Option Plans	The following table presents option activity under the Company’s stock option plans as of and for the year ended December 31, 2018. Number of Stock Options Outstanding Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (In thousands) (In years) (In thousands) Outstanding at January 1, 2018 588 $ 13.12 Granted 141 23.73 Exercised (167 ) 10.21 Forfeited or expired (30 ) 15.07 Outstanding at December 31, 2018 532 $ 16.73 6.26 $ 2,368 Vested or expected to vest at December 31, 2018 514 $ 16.73 6.23 $ 2,303 Exercisable at December 31, 2018 275 $ 13.29 4.31 $ 1,915
Summary of Status of Company's Non-Vested Restricted Shares	The table below summarizes activity related to the Company’s non-vested for the year ended December 31, 2018. Shares Weighted Value (In thousands) Nonvested at January 1, 2018 376 $ 16.82 Granted 424 23.84 Vested (158 ) 16.50 Forfeited (18 ) 20.57 Nonvested at December 31, 2018 624 $ 21.56

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Regulatory Capital Amounts and Ratios for Company and Bank	As of December 31, 2018 and 2017, the Company had $25.0 million of trust-preferred securities, which were included in Tier 1 capital for regulatory purposes, respectively. The following table summarizes regulatory capital amounts and ratios for the Company and the Bank as of December 31, 2018 and 2017. To Be Well For Capital Capitalized under Prompt Corrective Actual Adequacy Purposes Action Provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) As of December 31, 2018: Total Capital (to Risk-Weighted Assets) Company $ 1,263,800 14.13 % $ 715,283 > 8.00 % N/A Bank $ 1,253,219 14.03 % $ 714,601 > 8.00 % $ 893,251 > 10.00 % Tier 1 Capital (to Risk-Weighted Assets) Company $ 1,191,228 13.32 % $ 536,462 > 6.00 % N/A Bank $ 1,180,647 13.22 % $ 535,951 > 6.00 % $ 714,601 > 8.00 % Common equity Tier 1 capital ratio Company $ 1,166,228 13.04 % $ 402,347 > 4.50 % N/A Bank $ 1,180,647 13.22 % $ 401,963 > 4.50 % $ 580,613 > 6.50 % Tier 1 Capital (to Average- Assets) Company $ 1,191,228 10.98 % $ 433,834 > 4.00 % N/A Bank $ 1,180,647 10.90 % $ 433,403 > 4.00 % $ 541,754 > 5.00 % As of December 31, 2017: Total Capital (to Risk-Weighted Assets) Company $ 1,039,060 18.01 % $ 461,574 > 8.00 % N/A Bank $ 1,029,126 17.86 % $ 461,037 > 8.00 % $ 576,296 > 10.00 % Tier 1 Capital (to Risk-Weighted Assets) Company $ 973,169 16.87 % $ 346,180 > 6.00 % N/A Bank $ 963,235 16.71 % $ 345,778 > 6.00 % $ 461,037 > 8.00 % Common equity Tier 1 capital ratio Company $ 948,210 16.43 % $ 259,635 > 4.50 % N/A Bank $ 963,235 16.71 % $ 259,333 > 4.50 % $ 374,592 > 6.50 % Tier 1 Capital (to Average- Assets) Company $ 973,169 11.88 % $ 327,680 > 4.00 % N/A Bank $ 963,235 11.77 % $ 327,397 > 4.00 % $ 409,246 > 5.00 %

Fair Value Information (Tables)

Fair Value Information (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	Carrying Value at December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Description of assets Investment securities - AFS: Residential mortgage-backed securities $ 1,474,508 $ - $ 1,474,508 $ - CMO/REMIC - residential 214,051 - 214,051 - Municipal bonds 44,810 - 44,810 - Other securities 716 - 716 - Total investment securities - AFS 1,734,085 - 1,734,085 - Interest rate swaps 1,938 - 1,938 - Total assets $ 1,736,023 $ - $ 1,736,023 $ - Description of liability Interest rate swaps $ 1,938 $ - $ 1,938 $ - Total liabilities $ 1,938 $ - $ 1,938 $ - Carrying Value at December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Dollars in thousands) Description of assets Investment securities - AFS: Residential mortgage-backed securities $ 1,750,909 $ - $ 1,750,909 $ - CMO/ REMIC - residential 273,829 - 273,829 - Municipal bonds 55,496 - 55,496 - Other securities 751 - 751 - Total investment securities - AFS 2,080,985 - 2,080,985 - Interest rate swaps 3,211 - 3,211 - Total assets $ 2,084,196 $ - $ 2,084,196 $ - Description of liability Interest rate swaps $ 3,211 $ - $ 3,211 $ - Total liabilities $ 3,211 $ - $ 3,211 $ -
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 December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Losses For the Year Ended December 31, 2018 (Dollars in thousands) Description of assets Impaired loans, excluding PCI loans: Commercial and industrial $ 189 $ - $ - $ 189 $ 3 SBA - - - - - Real estate: Commercial real estate 3,143 - - 3,143 478 Construction - - - - - SFR mortgage - - - - - Dairy & livestock and agribusiness 78 - - 78 12 Consumer and other loans 68 - - 68 68 Other real estate owned - - - - - Asset held-for-sale - - - - - Total assets $ 3,478 $ - $ - $ 3,478 $ 561 Carrying Value at Quoted Prices in Identical Assets (Level 1) Significant Other (Level 2) Significant (Level 3) Total Losses (Dollars in thousands) Description of assets Impaired loans, excluding PCI loans: Commercial and industrial $ - $ - $ - $ - $ - SBA - - - - - Real estate: Commercial real estate - - - - - Construction - - - - - SFR mortgage - - - - - Dairy & livestock and agribusiness - - - - - Consumer and other loans 378 - - 378 74 Other real estate owned - - - - - Asset held-for-sale - - - - - Total assets $ 378 $ - $ - $ 378 $ 74
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 December 31, 2018 and 2017, respectively. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. December 31, 2018 Estimated Fair Value Carrying Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 163,948 $ 163,948 $ - $ - $ 163,948 Interest-earning balances due from depository institutions 7,670 - 7,339 - 7,339 Investment securities available-for-sale 1,734,085 - 1,734,085 - 1,734,085 Investment securities held-to-maturity 744,440 - 721,537 - 721,537 Total loans, net of allowance for loan losses (1) 7,700,998 - - 7,514,964 7,514,964 Swaps 1,938 - 1,938 - 1,938 Liabilities Deposits: Interest-bearing $ 3,622,703 $ - $ 3,614,682 $ - $ 3,614,682 Borrowings 722,255 - 721,601 - 721,601 Junior subordinated debentures 25,774 - - 21,176 21,176 Swaps 1,938 - 1,938 - 1,938 (1) The fair value of loans as of December 31, 2018 was measured using an exit price notion. December 31, 2017 Estimated Fair Value Carrying Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and due from banks $ 144,377 $ 144,377 $ - $ - $ 144,377 Interest-earning balances due from depository institutions 17,952 - 17,951 - 17,951 FHLB stock 17,688 - 17,688 - 17,688 Investment securities available-for-sale 2,080,985 - 2,080,985 - 2,080,985 Investment securities held-to-maturity 829,890 - 819,215 - 819,215 Total loans, net of allowance for loan losses 4,771,046 - - 4,678,402 4,678,402 Swaps 3,211 - 3,211 - 3,211 Liabilities Deposits: Noninterest-bearing $ 3,846,436 $ 3,846,436 $ - $ - $ 3,846,436 Interest-bearing 2,700,417 - 2,697,781 - 2,697,781 Borrowings 553,773 - 553,416 - 553,416 Junior subordinated debentures 25,774 - - 18,070 18,070 Swaps 3,211 - 3,211 - 3,211

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting Information by Segment

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Instruments	As of December 31, 2018 and 2017, the total notional amount of the Company’s swaps was $195.4 million and $198.5 million, respectively. The location of the asset and liability, and their respective fair values are summarized in the tables below. December 31, 2018 Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 1,938 Other liabilities $ 1,938 Total derivatives $ 1,938 $ 1,938 December 31, 2017 Asset Derivatives Liability Derivatives Balance Sheet Location Fair Value Balance Sheet Location Fair Value (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 3,211 Other liabilities $ 3,211 Total derivatives $ 3,211 $ 3,211
Effect of Derivative Instruments on Consolidated Statement of Earnings	The following table summarizes the effect of derivative financial instruments on the consolidated statements of earnings for the periods presented. Derivatives Not Instruments Location of Gain Amount of Gain Recognized in Income on Derivative Instruments For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Interest rate swaps Other income $ 340 $ 615 $ 691 Total $ 340 $ 615 $ 691

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Summary of Components of Other Comprehensive Income	The tables below provide a summary of the components of OCI for the periods presented. For the Year Ended December 31, 2018 2017 2016 Before-tax Tax effect After-tax 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 $ (26,435 ) $ 7,815 $ (18,620 ) $ (11,336 ) $ 4,760 $ (6,576 ) $ (15,792 ) $ 6,633 $ (9,159 ) Amortization of unrealized (gains)/ losses on securities transferred from available-for-sale to held-to-maturity (2,091 ) 619 (1,472 ) (3,293 ) 1,383 (1,910 ) (2,174 ) 913 (1,261 ) Net realized (gain)/loss reclassified into earnings (1) — — — (402 ) 169 (233 ) (548 ) 230 (318 ) Net change $ (28,526 ) $ 8,434 $ (20,092 ) $ (15,031 ) $ 6,312 $ (8,719 ) $ (18,514 ) $ 7,776 $ (10,738 ) (1) Included in other noninterest income.

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Schedule of Balance Sheet Offsetting	The repurchase agreements are not offset in the condensed consolidated balances. Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset in the Consolidated Balance Sheets the Consolidated Consolidated in the Financial Instruments Collateral Pledged Net Amount (Dollars in thousands) December 31, 2018 Financial assets: Derivatives not designated as hedging instruments $ 1,938 $ — $ — $ 1,938 $ — $ 1,938 Total $ 1,938 $ — $ — $ 1,938 $ — $ 1,938 Financial liabilities: Derivatives not designated as hedging instruments $ 4,203 $ (2,265 ) $ 1,938 $ 2,265 $ — $ 4,203 Repurchase agreements 442,255 — 442,255 — (487,607 ) (45,352 ) Total $ 446,458 $ (2,265 ) $ 444,193 $ 2,265 $ (487,607 ) $ (41,149 ) December 31, 2017 Financial assets: Derivatives not designated as hedging instruments $ 3,211 $ — $ — $ 3,211 $ — $ 3,211 Total $ 3,211 $ — $ — $ 3,211 $ — $ 3,211 Financial liabilities: Derivatives not designated as hedging instruments $ 4,495 $ (1,284 ) $ 3,211 $ 1,284 $ (12,760 ) $ (8,265 ) Repurchase agreements 553,773 — 553,773 — (573,759 ) (19,986 ) Total $ 558,268 $ (1,284 ) $ 556,984 $ 1,284 $ (586,519 ) $ (28,251 )

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2018
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 and out-of-scope of Topic 606, for the periods indicated. For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Noninterest income: In-scope of Topic 606: Service charges on deposit accounts $ 17,070 $ 15,809 $ 15,066 Trust and investment services 8,774 9,845 9,595 Bankcard services 3,485 3,406 2,921 Gain on OREO, net 3,546 6 (20 ) Other 6,588 4,888 3,457 Noninterest Income (in-scope of Topic 606) 39,463 33,954 31,019 Noninterest Income (out-of-scope of Topic 606) 4,018 8,164 4,533 Total noninterest income $ 43,481 $ 42,118 $ 35,552

Condensed Financial Informati_2

Condensed Financial Information of Parent Company (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheets	CONDENSED BALANCE SHEETS As of December 31, 2018 2017 (Dollars in thousands) Assets Investment in subsidiaries $ 1,865,609 $ 1,084,332 Other assets, net 31,628 26,703 Total assets $ 1,897,237 $ 1,111,035 Liabilities $ 46,047 $ 41,769 Stockholders’ equity 1,851,190 1,069,266 Total liabilities and stockholders’ equity $ 1,897,237 $ 1,111,035
Condensed Statements of Earnings	CONDENSED STATEMENTS OF EARNINGS For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Excess in net earnings of subsidiaries $ 78,601 $ 50,253 $ 55,192 Dividends from the Bank 77,800 57,000 49,000 Other expense, net (4,398 ) (2,842 ) (2,763 ) Net earnings $ 152,003 $ 104,411 $ 101,429
Condensed Statements of Cash Flows	CONDENSED STATEMENTS OF CASH FLOWS For the Year Ended December 31, 2018 2017 2016 (Dollars in thousands) Cash Flows from Operating Activities Net earnings $ 152,003 $ 104,411 $ 101,429 Adjustments to reconcile net earnings to cash used in operating activities: Earnings of subsidiaries (156,401 ) (107,253 ) (104,192 ) Tax settlement received from the Bank — 1,577 2,557 Stock-based compensation 3,508 2,953 2,803 Other operating activities, net (2,052 ) (1,725 ) (3,362 ) Total adjustments (154,945 ) (104,448 ) (102,194 ) Net cash used in operating activities (2,942 ) (37 ) (765 ) Cash Flows from Investing Activities Dividends received from the Bank 77,800 57,000 49,000 Net cash provided by investing activities 77,800 57,000 49,000 Cash Flows from Financing Activities Cash dividends on common stock (65,966 ) (57,047 ) (51,625 ) Proceeds from exercise of stock options 1,701 2,683 5,151 Tax benefit related to exercise of stock options — — 932 Repurchase of common stock (7,760 ) (1,128 ) (1,907 ) Net cash used in financing activities (72,025 ) (55,492 ) (47,449 ) Net increase in cash and cash equivalents 2,833 1,471 786 Cash and cash equivalents, beginning of period 19,217 17,746 16,960 Cash and cash equivalents, end of period $ 22,050 $ 19,217 $ 17,746

Quarterly Financial Data (Table

Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Summarized Quarterly Financial Data	The following table sets forth our unaudited, quarterly results for the periods indicated. For the Three Months Ended December 31, September 30, June 30, March 31, (Dollars in thousands, except per share amounts) 2018 Net interest income $ 113,016 $ 92,820 $ 72,688 $ 70,521 Provision for (recapture of) loan losses 3,000 500 (1,000 ) (1,000 ) Net earnings 43,159 38,558 35,373 34,913 Basic earnings per common share 0.31 0.30 0.32 0.32 Diluted earnings per common share 0.31 0.30 0.32 0.32 2017 Net interest income $ 71,275 $ 71,739 $ 70,483 $ 65,433 Recapture of provision for loan losses (1,500 ) (1,500 ) (1,000 ) (4,500 ) Net earnings 17,851 29,683 28,373 28,504 Basic earnings per common share 0.16 0.27 0.26 0.26 Diluted earnings per common share 0.16 0.27 0.26 0.26

Business - Additional Informati

Business - Additional Information (Detail) $ in Millions	Mar. 10, 2017USD ($)Branch	Feb. 29, 2016USD ($)Branch	Dec. 31, 2018SubsidiaryLocation	Aug. 10, 2018USD ($)
Schedule Of Description Of Company [Line Items]
Number of inactive subsidiaries | Subsidiary			1
Bank operated banking centers | Location			68
Bank operated trust office locations, number | Location			3
Valley Commerce Bancorp [Member]
Schedule Of Description Of Company [Line Items]
Total assets	$ 400
Number of bank branches acquired | Branch	4
County Commerce Bank [Member]
Schedule Of Description Of Company [Line Items]
Total assets		$ 253
Number of bank branches acquired | Branch		4
Community Bank [Member]
Schedule Of Description Of Company [Line Items]
Bank operated banking centers				16
Total assets				$ 4,090

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018USD ($)SegmentOffice	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Oct. 16, 2009
Summary Of Significant Accounting Policies [Line Items]
Number of operating business segments | Segment	2
Net unrealized holding gain after tax	$ (20,092,000)	$ (8,719,000)	$ (10,738,000)
Number of days on which collection of interest on principal is no longer probable	90 days
Period over which borrower has to demonstrate repayment performance in compliance with restructured terms to take loan out of nonaccrual status	6 months
Original terms of modified loans	6 months
Number of days on which charge-offs unsecured consumer loans are recorded	120 days
Minimum loan amount for credit review process	$ 1,000,000
Allowance for loan losses look-back period, revised	Rolling 20-quarters
Agreed percentage of losses in loss sharing agreement				80.00%
Commercial loans expiration date	Oct. 16, 2014
Goodwill impairment	$ 0
Number of offices providing services, CitizensTrust | Office	3
Assets under administration, CitizensTrust	$ 2,540,000,000
Assets under management, CitizensTrust	$ 1,800,000,000
Single-family Residential Loans [Member]
Summary Of Significant Accounting Policies [Line Items]
Commercial loans expiration date	Oct. 16, 2019
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days over which principal or interest payments are past due to consider loans, excluding PCI loans	30 days
Number of days for which principal or interest payments on loans, excluding PCI loans remain accrual	30 days
Length of modified debt term	3 months
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days for which principal or interest payments on loans, excluding PCI loans remain accrual	89 days

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Summary of Useful Lives of Principal Classes of Assets (Detail)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Estimated economic lives of leasehold improvements	Shorter of estimated economic lives of 15 years or term of the lease.
Minimum [Member] | Bank Premises [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of asset	15 years
Minimum [Member] | Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of asset	3 years
Minimum [Member] | Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of asset	5 years
Maximum [Member] | Bank Premises [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of asset	39 years
Maximum [Member] | Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of asset	7 years
Maximum [Member] | Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of asset	10 years

Business Combinations - Additio

Business Combinations - Additional Information (Detail)	Aug. 10, 2018USD ($)Branch	Mar. 10, 2017USD ($)Branch	Feb. 29, 2016USD ($)Branch	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Business Acquisition [Line Items]
Acquisition date				Oct. 16, 2009
Goodwill				$ 666,539,000	$ 116,564,000	$ 89,533,000
Merger related expenses				$ 16,404,000	2,251,000	$ 1,897,000
Valley Commerce Bancorp [Member]
Business Acquisition [Line Items]
Acquisition date				Mar. 10, 2017
Acquired assets and assumed liabilities for cash		$ 23,200,000
Assets and assumed all of the liabilities, stock		37,600,000
Goodwill		27,000,000
Core deposit intangible assets		3,200,000
Total fair value of assets acquired		405,900,000
Cash and cash equivalents		28,300,000
FHLB stock		2,000,000
Loans and lease finance receivables		309,700,000
Fixed assets		5,300,000
Bank-Owned Life Insurance		9,400,000
Other assets		21,000,000
Total fair value of liabilities assumed		368,300,000
Deposits		361,800,000
Other liabilities		$ 6,500,000
Merger related expenses				$ 0	2,100,000
Valley Business Bank [Member]
Business Acquisition [Line Items]
Number of branches owned by merger company | Branch		4
Community Bank [Member]
Business Acquisition [Line Items]
Acquisition date				Aug. 10, 2018
Number of branches owned by merger company | Branch	16
Acquired assets and assumed liabilities for cash	$ 180,719,000
Assets and assumed all of the liabilities, stock	722,767,000
Goodwill	549,975,000
Core deposit intangible assets	$ 52,200,000
Percentage of core deposits to total deposits	2.26%
Total fair value of assets acquired	$ 3,716,260,000
Cash and cash equivalents	47,802,000
FHLB stock	17,250,000
Loans and lease finance receivables	2,734,081,000
Bank-Owned Life Insurance	70,904,000
Other assets	54,479,000
Total fair value of liabilities assumed	353,511,000
Deposits	2,869,986,000
Other liabilities	29,192,000
Merger related expenses				$ 16,400,000
FHLB advances	166,000,000
Gross contractual amount receivable, as of acquisition date	3,000,000,000
contractual principal cash flows, loans not expected to be collected	$ 4,500,000
County Commerce Bank [Member]
Business Acquisition [Line Items]
Acquisition date				Feb. 29, 2016
Number of branches owned by merger company | Branch			4
Acquired assets and assumed liabilities for cash			$ 20,600,000
Assets and assumed all of the liabilities, stock			21,600,000
Goodwill			15,300,000
Core deposit intangible assets			3,900,000
Total fair value of assets acquired			252,400,000
Cash and cash equivalents			54,800,000
FHLB stock			1,500,000
Loans and lease finance receivables			168,000,000
Fixed assets			8,600,000
Other assets			289,000
Total fair value of liabilities assumed			230,800,000
Deposits			224,200,000
Other liabilities			1,600,000
Merger related expenses				$ 0	$ 145,000
FHLB advances			$ 5,000,000

Business Combinaions - Schedule

Business Combinaions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Aug. 10, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Liabilities assumed
Goodwill		$ 666,539	$ 116,564	$ 89,533
Community Bank [Member]
Merger Consideration
Cash paid	$ 180,719
CVBF common stock issued	722,767
Total merger consideration	903,486
Assets Acquired
Cash and cash equivalents	47,802
Investment securities	716,996
FHLB stock	17,250
Loans	2,734,081
Accrued interest receivable	7,916
Premises and equipment	14,632
BOLI	70,904
Core deposit intangible	52,200
Other assets	54,479
Total assets acquired	3,716,260
Liabilities assumed
Deposits	2,869,986
FHLB advances	297,571
Other borrowings	166,000
Other liabilities	29,192
Total liabilities assumed	3,362,749
Total fair value of identifiable net assets, at fair value	353,511
Goodwill	$ 549,975

Business Combinations - Busines

Business Combinations - Business Acquisition Pro Forma Information (Detail) - Community Bank [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Acquisitions ProForma Information [Line Items]
Total revenues (net interest income plus noninterest income)	$ 488,620	$ 477,235
Net Income	$ 181,433	$ 139,129
Earnings per share - basic	$ 1.30	$ 1
Earnings per share - diluted	$ 1.29	$ 0.99

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Estimated Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 1,757,666	$ 2,078,131
Gross Unrealized Holding Gain, Available-for-sale	2,033	13,282
Gross Unrealized Holding Loss, Available-for-sale	(25,614)	(10,428)
Fair Value, Available-for-sale	$ 1,734,085	$ 2,080,985
Total Percent, Available-for-sale	100.00%	100.00%
Amortized Cost, Held-to-maturity	$ 744,440	$ 829,890
Gross Unrealized Holding Gain, Held-to-maturity	1,128	4,272
Gross Unrealized Holding Loss, Held-to-maturity	(24,031)	(14,947)
Fair Value, Held-to-maturity	$ 721,537	$ 819,215
Total Percent, Held-to-maturity	100.00%	100.00%
CMO/REMIC - Residential [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 217,223	$ 274,634
Gross Unrealized Holding Gain, Available-for-sale	353	1,277
Gross Unrealized Holding Loss, Available-for-sale	(3,525)	(2,082)
Fair Value, Available-for-sale	$ 214,051	$ 273,829
Total Percent, Available-for-sale	12.34%	13.16%
Amortized Cost, Held-to-maturity	$ 215,336	$ 225,072
Gross Unrealized Holding Gain, Held-to-maturity	0	0
Gross Unrealized Holding Loss, Held-to-maturity	(12,081)	(8,641)
Fair Value, Held-to-maturity	$ 203,255	$ 216,431
Total Percent, Held-to-maturity	28.93%	27.12%
Government Agency/GSE [Member]
Schedule of Investments [Line Items]
Amortized Cost, Held-to-maturity	$ 138,274	$ 159,716
Gross Unrealized Holding Gain, Held-to-maturity	572	854
Gross Unrealized Holding Loss, Held-to-maturity	(2,622)	(2,134)
Fair Value, Held-to-maturity	$ 136,224	$ 158,436
Total Percent, Held-to-maturity	18.57%	19.25%
Residential Mortgage-backed Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 1,494,106	$ 1,747,780
Gross Unrealized Holding Gain, Available-for-sale	1,348	11,231
Gross Unrealized Holding Loss, Available-for-sale	(20,946)	(8,102)
Fair Value, Available-for-sale	$ 1,474,508	$ 1,750,909
Total Percent, Available-for-sale	85.03%	84.14%
Amortized Cost, Held-to-maturity	$ 153,874	$ 176,427
Gross Unrealized Holding Gain, Held-to-maturity	0	667
Gross Unrealized Holding Loss, Held-to-maturity	(3,140)	(382)
Fair Value, Held-to-maturity	$ 150,734	$ 176,712
Total Percent, Held-to-maturity	20.67%	21.26%
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 45,621	$ 54,966
Gross Unrealized Holding Gain, Available-for-sale	332	774
Gross Unrealized Holding Loss, Available-for-sale	(1,143)	(244)
Fair Value, Available-for-sale	$ 44,810	$ 55,496
Total Percent, Available-for-sale	2.59%	2.66%
Amortized Cost, Held-to-maturity	$ 236,956	$ 268,675
Gross Unrealized Holding Gain, Held-to-maturity	556	2,751
Gross Unrealized Holding Loss, Held-to-maturity	(6,188)	(3,790)
Fair Value, Held-to-maturity	$ 231,324	$ 267,636
Total Percent, Held-to-maturity	31.83%	32.37%
Other Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 716	$ 751
Gross Unrealized Holding Gain, Available-for-sale	0	0
Gross Unrealized Holding Loss, Available-for-sale	0	0
Fair Value, Available-for-sale	$ 716	$ 751
Total Percent, Available-for-sale	0.04%	0.04%

Investment Securities - Summa_2

Investment Securities - Summary of Interest Income Earned on Investment Securities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net Investment Income [Line Items]
Total interest income from available-for-sale securities	$ 45,988	$ 49,778	$ 47,702
Total interest income from held-to-maturity securities	18,901	21,015	20,227
Total investment income	64,889	70,793	67,929
Investment securities available-for-sale [Member]
Net Investment Income [Line Items]
Taxable	44,423	47,596	43,538
Tax-advantaged	1,565	2,182	4,164
Investment securities held-to-maturity [Member]
Net Investment Income [Line Items]
Taxable	11,848	12,558	10,183
Tax-advantaged	$ 7,053	$ 8,457	$ 10,044

Investment Securities - Summa_3

Investment Securities - Summary of Continuous Unrealized Loss Position of Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	$ 738,461	$ 510,174
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	(5,417)	(2,319)
Fair Value, 12 Months or Longer, Available-for-sale	742,610	388,925
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale	(20,197)	(8,109)
Fair Value, Available-for-sale	1,481,071	899,099
Gross Unrealized Holding Losses, Available-for-sale	(25,614)	(10,428)
Fair Value, Less Than 12 Months, Held-to-maturity	138,339	102,316
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity	(1,277)	(707)
Fair Value, 12 Months or Longer, Held-to-maturity	426,784	381,449
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity	(22,754)	(14,240)
Fair Value, Held-to-maturity	565,123	483,765
Gross Unrealized Holding Losses, Held-to-maturity	(24,031)	(14,947)
CMO/REMIC - Residential [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	36,582	95,137
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	(365)	(487)
Fair Value, 12 Months or Longer, Available-for-sale	135,062	71,223
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale	(3,160)	(1,595)
Fair Value, Available-for-sale	171,644	166,360
Gross Unrealized Holding Losses, Available-for-sale	(3,525)	(2,082)
Fair Value, Less Than 12 Months, Held-to-maturity	0	0
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity	0	0
Fair Value, 12 Months or Longer, Held-to-maturity	203,254	216,431
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity	(12,081)	(8,641)
Fair Value, Held-to-maturity	203,254	216,431
Gross Unrealized Holding Losses, Held-to-maturity	(12,081)	(8,641)
Government Agency/GSE [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Held-to-maturity	7,479	18,950
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity	(15)	(27)
Fair Value, 12 Months or Longer, Held-to-maturity	54,944	43,495
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity	(2,607)	(2,107)
Fair Value, Held-to-maturity	62,423	62,445
Gross Unrealized Holding Losses, Held-to-maturity	(2,622)	(2,134)
Residential Mortgage-backed Securities [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	692,311	414,091
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	(4,864)	(1,828)
Fair Value, 12 Months or Longer, Available-for-sale	593,367	303,746
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale	(16,082)	(6,274)
Fair Value, Available-for-sale	1,285,678	717,837
Gross Unrealized Holding Losses, Available-for-sale	(20,946)	(8,102)
Fair Value, Less Than 12 Months, Held-to-maturity	59,871	51,297
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity	(484)	(188)
Fair Value, 12 Months or Longer, Held-to-maturity	90,863	55,306
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity	(2,656)	(194)
Fair Value, Held-to-maturity	150,734	106,603
Gross Unrealized Holding Losses, Held-to-maturity	(3,140)	(382)
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	9,568	946
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	(188)	(4)
Fair Value, 12 Months or Longer, Available-for-sale	14,181	13,956
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale	(955)	(240)
Fair Value, Available-for-sale	23,749	14,902
Gross Unrealized Holding Losses, Available-for-sale	(1,143)	(244)
Fair Value, Less Than 12 Months, Held-to-maturity	70,989	32,069
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity	(778)	(492)
Fair Value, 12 Months or Longer, Held-to-maturity	77,723	66,217
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity	(5,410)	(3,298)
Fair Value, Held-to-maturity	148,712	98,286
Gross Unrealized Holding Losses, Held-to-maturity	$ (6,188)	$ (3,790)

Investment Securities - Summa_4

Investment Securities - Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Due in one year or less, Amortized Cost, Held-to-maturity	$ 500
Due after one year through five years, Amortized Cost, Held-to-maturity	288,967
Due after five years through ten years, Amortized Cost, Held-to-maturity	197,061
Due after ten years, Amortized Cost, Held-to-maturity	257,912
Total Held-to-maturity, Debt Maturities, Amortized Cost Basis	744,440
Due in one year or less, Fair Value, Held-to-maturity	508
Due after one year through five years, Fair Value, Held-to-maturity	276,693
Due after five years through ten years, Fair Value, Held-to-maturity	193,389
Due after ten years, Fair Value, Held-to-maturity	250,947
Total, Held-to-maturity, Fair Value	721,537
Due in one year or less, Amortized Cost, Available-for-sale	13,907
Due after one year through five years, Amortized Cost, Available-for-sale	1,574,638
Due after five years through ten years, Amortized Cost, Available-for-sale	143,258
Due after ten years, Amortized Cost, Available-for-sale	25,863
Amortized Cost, Available-for-sale	1,757,666	$ 2,078,131
Due in one year or less, Fair Value, Available-for-sale	14,069
Due after one year through five years, Fair Value, Available-for-sale	1,554,686
Due after five years through ten years, Fair Value, Available-for-sale	140,500
Due after ten years, Fair Value, Available-for-sale	24,830
Total Available-for-sale Securities, Debt Maturities, Available-for-sale, Fair Value	$ 1,734,085	$ 2,080,985

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Average life of investment grade debt securities, years	3 years 10 months 24 days
Credit-related impairment loss on investment securities held-to-maturity	$ 0	$ 0
Investment securities pledged as collateral	$ 1,660,000,000	$ 1,910,000,000
Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Average life of investment grade debt securities, years	9 years 7 months 6 days
Government Agency/GSE [Member]
Debt Securities, Available-for-sale [Line Items]
Agency bond callable	$ 89,700,000
United States [Member]
Debt Securities, Available-for-sale [Line Items]
Securities issued by U.S. government percentage	89.00%
CMO/REMIC - Residential [Member]
Debt Securities, Available-for-sale [Line Items]
Investment contractual cash flows guaranteed by Government, percentage	100.00%
Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Total investment portfolio representing municipal bonds, percentage	11.00%

Acquired SJB Assets and FDIC _3

Acquired SJB Assets and FDIC Loss Sharing Asset - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Business Combinations [Abstract]
Acquisition date	Oct. 16, 2009
Remaining discount associated with SJB loans	$ 0
Claims submitted for net losses on PCI loans	$ 118.9

Acquired SJB Assets and FDIC _4

Acquired SJB Assets and FDIC Loss Sharing Asset - Summary of PCI Loans and Lease Finance Receivables (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Real estate:
Less: Purchase accounting discount	$ 0
Gross PCI loans, net of discount	17,214	$ 28,882
Less: Allowance for PCI loan losses	(204)	(367)
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	519	934
SBA	1,258	1,383
Real estate:
Commercial real estate	14,407	27,431
Construction	0	0
SFR mortgage	145	162
Dairy & livestock and agribusiness	700	770
Municipal lease finance receivables	0	0
Consumer and other loans	185	228
Gross PCI loans	17,214	30,908
Less: Purchase accounting discount	0	(2,026)
Gross PCI loans, net of discount	17,214	28,882
Less: Allowance for PCI loan losses	(204)	(367)
Net loans	$ 17,010	$ 28,515

Acquired SJB Assets and FDIC _5

Acquired SJB Assets and FDIC Loss Sharing Asset - Summary of Gross PCI Loans by Internal Risk Ratings by Loans (Detail) - PCI Loans [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross PCI loans	$ 17,214	$ 30,908
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross PCI loans	15,816	26,439
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross PCI loans	1,174	1,088
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross PCI loans	224	3,381
Doubtful & Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross PCI loans	$ 0	$ 0

Acquired SJB Assets and FDIC _6

Acquired SJB Assets and FDIC Loss Sharing Asset - Summary of Activity Related to FDIC Loss Sharing Liability (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
FDIC Indemnification Asset [Roll Forward]
Balance, beginning of period	$ (107)	$ (502)
FDIC share of recoveries, net of charge-offs	0	0
Cash paid to FDIC, net	64	519
Other	43	(124)
Balance, end of period	$ 0	$ (107)

Loans and Lease Finance Recei_3

Loans and Lease Finance Receivables and Allowance for Loan Losses - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)ContractSecurityLoan	Dec. 31, 2017USD ($)Contract	Dec. 31, 2016USD ($)	Dec. 31, 2015Contract
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total fixed rate loans held		$ 3,770,000,000
Secure borrowings and available lines of credit from FHLB and Federal Reserve Bank		5,710,000,000	$ 3,680,000,000
Loans held-for-sale		0	0
Impaired, at carrying value		23,545,000	15,525,000	$ 26,385,000
Loans classified as troubled debt restructured		7,100,000
Impaired, at carrying value		$ 561,000	75,000	141,000
Number of performing loans | SecurityLoan		13
Provision for unfunded loan commitments		$ 250,000	400,000	450,000
Reserve for credit risk for undisbursed commitments		9,000,000	6,300,000
Allocation of allowance to troubled debt restructuring		$ 490,000,000	1,000,000
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		$ 250,000	400,000	$ 450,000
Community Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value	$ 12,300,000	$ 0
Provision for unfunded loan commitments	2,900,000
Increase in reserve for unfunded loan commitments	2,900,000
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)		74.99%
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)		69.58%
Nonaccrual Small Business Administration Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance		$ 2,900,000
Dairy & Livestock and Agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance		78,000
Impaired Loans Modified in Troubled Debt Restructure [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value		7,100,000
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate loan outstanding balance modified as a TDR within the previous 12 months that subsequently defaulted			$ 3,100,000
Nonaccrual Single Family Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance		2,900,000
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans modified as a TDR within the previous 12 months that subsequently defaulted | Contract			1
Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance		486,000
Nonperforming Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value		3,500,000
Loans classified as troubled debt restructured		3,500,000
Performing Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value	$ 23,500,000
Loans classified as troubled debt restructured		3,600,000
Performing Financing Receivable [Member] | Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured		473,000
Performing Financing Receivable [Member] | Impaired Loans Modified in Troubled Debt Restructure [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured		$ 3,600,000
Performing Financing Receivable [Member] | Single-family Residential Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan		9
Performing Financing Receivable [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured		$ 135,000
Number of loans | SecurityLoan		2
Performing Financing Receivable [Member] | Small Business Administration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan		1
Performing Financing Receivable [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan		1
Allowance Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured		$ 561,000
Loans, Excluding PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate loans		5,394,229,000	$ 3,376,713,000
Dairy & livestock and agribusiness		393,843,000	347,289,000
Outstanding balance		19,951,000	10,716,000
Impaired, at carrying value			15,500,000
Loans, Excluding PCI Loans [Member] | Dairy & Livestock Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Dairy & livestock and agribusiness		340,500,000	310,600,000
Loans, Excluding PCI Loans [Member] | Agribusiness Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Dairy & livestock and agribusiness		53,300,000	36,700,000
Loans, Excluding PCI Loans [Member] | Nonaccrual Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance		7,500,000
Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance		78,000	829,000
Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance		7,490,000	250,000
Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance		2,892,000	$ 906,000
Loans classified as troubled debt restructured		575,000
Loans, Excluding PCI Loans [Member] | Nonaccrual Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance		6,100,000
Loans, Excluding PCI Loans [Member] | Nonaccrual Single Family Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured		$ 2,400,000
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)		4.26%	6.10%
Commercial real estate loans		$ 229,800,000	$ 206,100,000
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]
Commercial real estate loans		102,900,000	118,200,000
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]
Commercial real estate loans		$ 126,900,000	$ 87,900,000

Loans and Lease Finance Recei_4

Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Components of Loans and Lease Finance Receivables, Excluding PCI Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, excluding PCI loans, net of deferred loan fees	$ 7,764,611	$ 4,830,631
Less: Allowance for loan losses	(63,613)	(59,585)	$ (61,540)	$ (59,156)
Total loans and lease finance receivables	7,700,998	4,771,046
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	519	934
PCI Loans	17,214	30,908
SBA	1,258	1,383
Discount on PCI loans	0	(2,026)
Commercial real estate	14,407	27,431
Construction	0	0
SFR mortgage	145	162
Dairy & livestock and agribusiness	700	770
Municipal lease finance receivables	0	0
Consumer and other loans	185	228
Less: Allowance for loan losses	(204)	(367)	$ (1,219)	$ 0
Net loans	17,010	28,515
Loans, Excluding PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	1,002,209	513,325
SBA	350,043	122,055
Commercial real estate	5,394,229	3,376,713
Construction	122,782	77,982
SFR mortgage	296,504	236,202
Dairy & livestock and agribusiness	393,843	347,289
Municipal lease finance receivables	64,186	70,243
Consumer and other loans	128,429	64,229
Total gross loans, excluding PCI loans	7,752,225	4,808,038
Less: Deferred loan fees, net	(4,828)	(6,289)
Gross loans, excluding PCI loans, net of deferred loan fees	7,747,397	4,801,749
Less: Allowance for loan losses	(63,409)	(59,218)
Net loans	$ 7,683,988	$ 4,742,531

Loans and Lease Finance Recei_5

Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Loan, Excluding PCI Loans by Internal Risk Ratings (Parenthetical) (Detail) $ in Millions	3 Months Ended
	Sep. 30, 2018USD ($)
Receivables [Abstract]
Payments to Acquire Loans Receivable	$ 19

Loans and Lease Finance Recei_6

Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Loan, Excluding PCI Loans by Internal Risk Ratings (Detail) - Loans, Excluding PCI Loans [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	$ 1,002,209	$ 513,325
SBA	350,043	122,055
Commercial real estate, Owner occupied	2,117,990	1,096,280
Commercial real estate, Non-owner occupied	3,276,239	2,280,433
Construction, Speculative	118,233	60,042
Construction, Non-speculative	4,549	17,940
SFR mortgage	296,504	236,202
Dairy & livestock and agribusiness	393,843	347,289
Municipal lease finance receivables	64,186	70,243
Consumer and other loans	128,429	64,229
Total gross loans, excluding PCI loans	7,752,225	4,808,038
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	961,909	483,641
SBA	336,033	112,835
Commercial real estate, Owner occupied	2,008,169	1,009,199
Commercial real estate, Non-owner occupied	3,260,822	2,257,130
Construction, Speculative	118,233	60,042
Construction, Non-speculative	4,549	17,940
SFR mortgage	289,607	229,032
Dairy & livestock and agribusiness	350,044	321,413
Municipal lease finance receivables	63,650	69,644
Consumer and other loans	126,085	61,715
Total gross loans, excluding PCI loans	7,519,101	4,622,591
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	29,358	19,566
SBA	7,375	5,358
Commercial real estate, Owner occupied	95,841	76,111
Commercial real estate, Non-owner occupied	9,938	16,434
Construction, Speculative	0	0
Construction, Non-speculative	0	0
SFR mortgage	3,310	3,124
Dairy & livestock and agribusiness	34,586	9,047
Municipal lease finance receivables	536	599
Consumer and other loans	1,263	1,255
Total gross loans, excluding PCI loans	182,207	131,494
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	10,942	10,118
SBA	6,635	3,862
Commercial real estate, Owner occupied	13,980	10,970
Commercial real estate, Non-owner occupied	5,479	6,869
Construction, Speculative	0	0
Construction, Non-speculative	0	0
SFR mortgage	3,587	4,046
Dairy & livestock and agribusiness	9,213	16,829
Municipal lease finance receivables	0	0
Consumer and other loans	1,081	1,259
Total gross loans, excluding PCI loans	50,917	53,953
Doubtful & Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	0	0
SBA	0	0
Commercial real estate, Owner occupied	0	0
Commercial real estate, Non-owner occupied	0	0
Construction, Speculative	0	0
Construction, Non-speculative	0	0
SFR mortgage	0	0
Dairy & livestock and agribusiness	0	0
Municipal lease finance receivables	0	0
Consumer and other loans	0	0
Total gross loans, excluding PCI loans	$ 0	$ 0

Loans and Lease Finance Recei_7

Loans and Lease Finance Receivables and Allowance for Loan Losses - Schedule of Balance and Activity Related to Allowance for Loan Losses for Held-for-Investment Loans by Type (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 59,585	$ 61,540	$ 59,156
Charge-offs	(291)	(151)	(238)
Recoveries	2,819	6,696	9,022
(Recapture of) provision for loan losses	1,500	(8,500)	(6,400)
Ending Balance	63,613	59,585	61,540
PCI Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	367	1,219	0
Charge-offs	0	0	0
Recoveries	0	0	0
(Recapture of) provision for loan losses	(163)	(852)	1,219
Ending Balance	204	367	1,219
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	7,280	8,154	8,588
Charge-offs	(10)	(138)	(120)
Recoveries	82	118	630
(Recapture of) provision for loan losses	168	(854)	(944)
Ending Balance	7,520	7,280	8,154
Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	869	871	993
Charge-offs	(257)	0	0
Recoveries	20	78	40
(Recapture of) provision for loan losses	430	(80)	(162)
Ending Balance	1,062	869	871
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	41,722	37,443	36,995
Charge-offs	0	0	0
Recoveries	0	154	792
(Recapture of) provision for loan losses	3,212	4,125	(344)
Ending Balance	44,934	41,722	37,443
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	984	1,096	2,389
Charge-offs	0	0	0
Recoveries	2,506	6,036	7,174
(Recapture of) provision for loan losses	(2,509)	(6,148)	(8,467)
Ending Balance	981	984	1,096
SFR Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,112	2,287	2,103
Charge-offs	(13)	0	(102)
Recoveries	51	212	0
(Recapture of) provision for loan losses	46	(387)	286
Ending Balance	2,196	2,112	2,287
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	4,647	8,541	6,029
Charge-offs	0	0	0
Recoveries	19	19	216
(Recapture of) provision for loan losses	549	(3,913)	2,296
Ending Balance	5,215	4,647	8,541
Municipal Lease Finance Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	851	941	1,153
Charge-offs	0	0	0
Recoveries	0	0	0
(Recapture of) provision for loan losses	(76)	(90)	(212)
Ending Balance	775	851	941
Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	753	988	906
Charge-offs	(11)	(13)	(16)
Recoveries	141	79	170
(Recapture of) provision for loan losses	(157)	(301)	(72)
Ending Balance	$ 726	$ 753	$ 988

Loans and Lease Finance Recei_8

Loans and Lease Finance Receivables and Allowance for Loan Losses - Schedule of Recorded Investment in Loans Held-for-Investment and Related Allowance for Loan Losses by Loan Type (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	$ 23,545	$ 15,525
Recorded Investment in Loans, Collectively Evaluated for Impairment	7,728,680	4,792,513
Recorded Investment in Loans, Acquired with Deterioriated Credit Quality	17,214	28,882
Allowance for Loan Losses, Individually Evaluated for Impairment	561	75
Allowance for Loan Losses, Collectively Evaluated for Impairment	62,848	59,143
Allowance for Loan Losses, Acquired with Deterioriated Credit Quality	204	367
PCI Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	0	0
Recorded Investment in Loans, Collectively Evaluated for Impairment	0	0
Recorded Investment in Loans, Acquired with Deterioriated Credit Quality	17,214	28,882
Allowance for Loan Losses, Individually Evaluated for Impairment	0	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	0	0
Allowance for Loan Losses, Acquired with Deterioriated Credit Quality	204	367
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	7,625	440
Recorded Investment in Loans, Collectively Evaluated for Impairment	994,584	512,885
Recorded Investment in Loans, Acquired with Deterioriated Credit Quality	0	0
Allowance for Loan Losses, Individually Evaluated for Impairment	3	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	7,517	7,280
Allowance for Loan Losses, Acquired with Deterioriated Credit Quality	0	0
Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	3,467	1,531
Recorded Investment in Loans, Collectively Evaluated for Impairment	346,576	120,524
Recorded Investment in Loans, Acquired with Deterioriated Credit Quality	0	0
Allowance for Loan Losses, Individually Evaluated for Impairment	0	1
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,062	868
Allowance for Loan Losses, Acquired with Deterioriated Credit Quality	0	0
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	6,540	8,133
Recorded Investment in Loans, Collectively Evaluated for Impairment	5,387,689	3,368,580
Recorded Investment in Loans, Acquired with Deterioriated Credit Quality	0	0
Allowance for Loan Losses, Individually Evaluated for Impairment	478	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	44,456	41,722
Allowance for Loan Losses, Acquired with Deterioriated Credit Quality	0	0
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	0	0
Recorded Investment in Loans, Collectively Evaluated for Impairment	122,782	77,982
Recorded Investment in Loans, Acquired with Deterioriated Credit Quality	0	0
Allowance for Loan Losses, Individually Evaluated for Impairment	0	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	981	984
Allowance for Loan Losses, Acquired with Deterioriated Credit Quality	0	0
SFR Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	5,349	4,040
Recorded Investment in Loans, Collectively Evaluated for Impairment	291,155	232,162
Recorded Investment in Loans, Acquired with Deterioriated Credit Quality	0	0
Allowance for Loan Losses, Individually Evaluated for Impairment	0	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	2,196	2,112
Allowance for Loan Losses, Acquired with Deterioriated Credit Quality	0	0
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	78	829
Recorded Investment in Loans, Collectively Evaluated for Impairment	393,765	346,460
Recorded Investment in Loans, Acquired with Deterioriated Credit Quality	0	0
Allowance for Loan Losses, Individually Evaluated for Impairment	12	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	5,203	4,647
Allowance for Loan Losses, Acquired with Deterioriated Credit Quality	0	0
Municipal Lease Finance Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	0	0
Recorded Investment in Loans, Collectively Evaluated for Impairment	64,186	70,243
Recorded Investment in Loans, Acquired with Deterioriated Credit Quality	0	0
Allowance for Loan Losses, Individually Evaluated for Impairment	0	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	775	851
Allowance for Loan Losses, Acquired with Deterioriated Credit Quality	0	0
Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	486	552
Recorded Investment in Loans, Collectively Evaluated for Impairment	127,943	63,677
Recorded Investment in Loans, Acquired with Deterioriated Credit Quality	0	0
Allowance for Loan Losses, Individually Evaluated for Impairment	68	74
Allowance for Loan Losses, Collectively Evaluated for Impairment	658	679
Allowance for Loan Losses, Acquired with Deterioriated Credit Quality	$ 0	$ 0

Loans and Lease Finance Recei_9

Loans and Lease Finance Receivables and Allowance for Loan Losses - Schedule of Recorded Investment in, and Aging of, Past Due and Nonaccrual Loans, Excluding PCI Loans by Class of Loans (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 33,000
60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	57,000	$ 376,000
Dairy & Livestock and Agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	78,000
Loans, Excluding PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	5,290,000	1,172,000
Nonaccrual	19,951,000	10,716,000
Current	7,726,984,000	4,796,150,000
Total gross loans, excluding PCI loans	7,752,225,000	4,808,038,000
Loans, Excluding PCI Loans [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	4,431,000	1,172,000
Loans, Excluding PCI Loans [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	859,000	0
Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	909,000	768,000
Nonaccrual	7,490,000	250,000
Current	993,810,000	512,307,000
Total gross loans, excluding PCI loans	1,002,209,000	513,325,000
Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	820,000	768,000
Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	89,000	0
Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	1,307,000	403,000
Nonaccrual	2,892,000	906,000
Current	345,844,000	120,746,000
Total gross loans, excluding PCI loans	350,043,000	122,055,000
Loans, Excluding PCI Loans [Member] | Small Business Administration [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	1,172,000	403,000
Loans, Excluding PCI Loans [Member] | Small Business Administration [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	135,000	0
Loans, Excluding PCI Loans [Member] | Commercial Real Estate Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	2,789,000	0
Nonaccrual	589,000	4,365,000
Current	2,114,612,000	1,091,915,000
Total gross loans, excluding PCI loans	2,117,990,000	1,096,280,000
Loans, Excluding PCI Loans [Member] | Commercial Real Estate Owner Occupied [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	2,439,000	0
Loans, Excluding PCI Loans [Member] | Commercial Real Estate Owner Occupied [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	350,000	0
Loans, Excluding PCI Loans [Member] | Commercial Real Estate Non-owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Nonaccrual	5,479,000	2,477,000
Current	3,270,760,000	2,277,956,000
Total gross loans, excluding PCI loans	3,276,239,000	2,280,433,000
Loans, Excluding PCI Loans [Member] | Commercial Real Estate Non-owner Occupied [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | Commercial Real Estate Non-owner Occupied [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | Construction Speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Nonaccrual	0	0
Current	118,233,000	60,042,000
Total gross loans, excluding PCI loans	118,233,000	60,042,000
Loans, Excluding PCI Loans [Member] | Construction Speculative [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | Construction Speculative [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | Construction Non-speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Nonaccrual	0	0
Current	4,549,000	17,940,000
Total gross loans, excluding PCI loans	4,549,000	17,940,000
Loans, Excluding PCI Loans [Member] | Construction Non-speculative [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | Construction Non-speculative [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	285,000	0
Nonaccrual	2,937,000	1,337,000
Current	293,282,000	234,865,000
Total gross loans, excluding PCI loans	296,504,000	236,202,000
Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	285,000	0
Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Nonaccrual	78,000	829,000
Current	393,765,000	346,460,000
Total gross loans, excluding PCI loans	393,843,000	347,289,000
Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | Municipal Lease Finance Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Nonaccrual	0	0
Current	64,186,000	70,243,000
Total gross loans, excluding PCI loans	64,186,000	70,243,000
Loans, Excluding PCI Loans [Member] | Municipal Lease Finance Receivables [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | Municipal Lease Finance Receivables [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	1,000
Nonaccrual	486,000	552,000
Current	127,943,000	63,676,000
Total gross loans, excluding PCI loans	128,429,000	64,229,000
Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	1,000
Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	$ 0	$ 0

Loans and Lease Finance Rece_10

Loans and Lease Finance Receivables and Allowance for Loan Losses - Schedule of Recorded Investment in, and Aging of, Past Due and Nonaccrual Loans, Excluding PCI Loans by Class of Loans (Parenthetical) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing loans, current	$ 2,300		$ 3,600
Community Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans		$ 12,300
30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	33
60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	57		376
90+ Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 17,600		$ 6,800

Loans and Lease Finance Rece_11

Loans and Lease Finance Receivables and Allowance for Loan Losses - Schedule of Held-for-Investment Loans, Excluding PCI Loans, Individually Evaluated for Impairment by Class of Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	$ 20,067	$ 15,146	$ 26,018
Recorded Investment, With a related allowance recorded	3,478	379	367
Recorded Investment, Total impaired loans	23,545	15,525	26,385
Unpaid Principal Balance, With no related allowance recorded	29,028	18,702	32,198
Unpaid Principal Balance, With a related allowance recorded	3,513	409	383
Unpaid Principal Balance, Total impaired loans	32,541	19,111	32,581
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	561	75	141
Related Allowance, Total impaired loans	561	75	141
Average Recorded Investment, With no related allowance recorded	22,789	15,820	26,406
Average Recorded Investment, With a related allowance recorded	3,501	391	439
Average Recorded Investment, Total impaired loans	26,290	16,211	26,845
Interest Income Recognized, With no related allowance recorded	163	306	938
Interest Income Recognized, With a related allowance recorded	0	0	23
Interest Income Recognized, Total impaired loans	163	306	961
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	7,436	440	730
Recorded Investment, With a related allowance recorded	189	0	171
Unpaid Principal Balance, With no related allowance recorded	11,457	980	1,646
Unpaid Principal Balance, With a related allowance recorded	191	0	171
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	3	0	114
Average Recorded Investment, With no related allowance recorded	7,718	548	832
Average Recorded Investment, With a related allowance recorded	203	0	233
Interest Income Recognized, With no related allowance recorded	7	10	26
Interest Income Recognized, With a related allowance recorded	0	0	9
Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	3,467	1,530	3,386
Recorded Investment, With a related allowance recorded		1	196
Unpaid Principal Balance, With no related allowance recorded	5,746	1,699	4,189
Unpaid Principal Balance, With a related allowance recorded	0	18	212
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	0	1	27
Average Recorded Investment, With no related allowance recorded	3,919	1,598	3,709
Average Recorded Investment, With a related allowance recorded	0	6	206
Interest Income Recognized, With no related allowance recorded	44	47	50
Interest Income Recognized, With a related allowance recorded	0	0	14
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	589	4,365	1,797
Recorded Investment, With a related allowance recorded	0	0	0
Unpaid Principal Balance, With no related allowance recorded	705	4,763	2,276
Unpaid Principal Balance, With a related allowance recorded	0	0	0
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	624	4,414	1,410
Average Recorded Investment, With a related allowance recorded	0	0	0
Interest Income Recognized, With no related allowance recorded	0	36	70
Interest Income Recognized, With a related allowance recorded	0	0	0
Commercial Real Estate Non-owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	2,808	3,768	13,331
Recorded Investment, With a related allowance recorded	3,143	0	0
Unpaid Principal Balance, With no related allowance recorded	4,324	5,107	15,842
Unpaid Principal Balance, With a related allowance recorded	3,144	0	0
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	478	0	0
Average Recorded Investment, With no related allowance recorded	4,585	3,951	13,517
Average Recorded Investment, With a related allowance recorded	3,144	0	0
Interest Income Recognized, With no related allowance recorded	32	94	592
Interest Income Recognized, With a related allowance recorded	0	0	0
Construction Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	0	0	0
Recorded Investment, With a related allowance recorded	0	0	0
Unpaid Principal Balance, With no related allowance recorded	0	0	0
Unpaid Principal Balance, With a related allowance recorded	0	0	0
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	0	0	0
Average Recorded Investment, With a related allowance recorded	0	0	0
Interest Income Recognized, With no related allowance recorded	0	0	0
Interest Income Recognized, With a related allowance recorded	0	0	0
Construction Non-speculative [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	0	0	0
Recorded Investment, With a related allowance recorded	0	0	0
Unpaid Principal Balance, With no related allowance recorded	0	0	0
Unpaid Principal Balance, With a related allowance recorded	0	0	0
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	0	0	0
Average Recorded Investment, With a related allowance recorded	0	0	0
Interest Income Recognized, With no related allowance recorded	0	0	0
Interest Income Recognized, With a related allowance recorded	0	0	0
SFR Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	5,349	4,040	5,174
Recorded Investment, With a related allowance recorded	0	0	0
Unpaid Principal Balance, With no related allowance recorded	6,270	4,692	6,075
Unpaid Principal Balance, With a related allowance recorded	0	0	0
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	5,484	4,119	5,327
Average Recorded Investment, With a related allowance recorded	0	0	0
Interest Income Recognized, With no related allowance recorded	80	118	135
Interest Income Recognized, With a related allowance recorded	0	0	0
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	0	829	747
Recorded Investment, With a related allowance recorded	78	0	0
Unpaid Principal Balance, With no related allowance recorded	0	1,091	747
Unpaid Principal Balance, With a related allowance recorded	78	0	0
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	12	0	0
Average Recorded Investment, With no related allowance recorded	0	988	692
Average Recorded Investment, With a related allowance recorded	78	0	0
Interest Income Recognized, With no related allowance recorded	0	1	47
Interest Income Recognized, With a related allowance recorded	0	0	0
Municipal Lease Finance Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	0	0	0
Recorded Investment, With a related allowance recorded	0	0	0
Unpaid Principal Balance, With no related allowance recorded	0	0	0
Unpaid Principal Balance, With a related allowance recorded	0	0	0
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	0	0	0
Average Recorded Investment, With a related allowance recorded	0	0	0
Interest Income Recognized, With no related allowance recorded	0	0	0
Interest Income Recognized, With a related allowance recorded	0	0	0
Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	418	174	853
Recorded Investment, With a related allowance recorded	68	378	0
Unpaid Principal Balance, With no related allowance recorded	526	370	1,423
Unpaid Principal Balance, With a related allowance recorded	100	391	0
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	68	74	0
Average Recorded Investment, With no related allowance recorded	459	202	919
Average Recorded Investment, With a related allowance recorded	76	385	0
Interest Income Recognized, With no related allowance recorded	0	0	18
Interest Income Recognized, With a related allowance recorded	$ 0	$ 0	$ 0

Loans and Lease Finance Rece_12

Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Activity Related to Troubled Debt Restructurings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 7,103	$ 9,009
Performing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	4,809	19,233
New modifications	311	3,143
Payoffs/payments, net and other	(1,526)	(14,752)
TDRs returned to accrual status	0	329
TDRs placed on nonaccrual status	0	(3,144)
Ending balance	3,594	4,809
Nonperforming TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	4,200	1,626
New modifications	316	2,066
Charge-offs	0	0
Payoffs/payments, net and other	(1,007)	(2,307)
TDRs returned to accrual status	0	(329)
TDRs placed on nonaccrual status	0	3,144
Ending balance	$ 3,509	$ 4,200

Loans and Lease Finance Rece_13

Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Loans Modified as Troubled Debt Restructurings (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)Contract	Dec. 31, 2017USD ($)Contract	Dec. 31, 2016USD ($)Contract
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	3	2	7
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 627	$ 5,127	$ 1,286
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	627	5,127	1,286
Troubled debt restructurings, Outstanding Recorded Investment	587	3,221	1,240
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 28
Commercial and Industrial [Member] | Interest rate reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	0	1
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 112
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	112
Troubled debt restructurings, Outstanding Recorded Investment	0	0	103
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0
Commercial and Industrial [Member] | Change in Amortization Period or Maturity [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	1	0	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 38	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	38	0	0
Troubled debt restructurings, Outstanding Recorded Investment	20	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0
Small Business Administration [Member] | Interest rate reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract			0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment			$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment			0
Troubled debt restructurings, Outstanding Recorded Investment			0
Troubled debt restructurings, Financial Effect Resulting From Modifications			$ 0
Small Business Administration [Member] | Change in Amortization Period or Maturity [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract			2
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment			$ 214
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment			214
Troubled debt restructurings, Outstanding Recorded Investment			196
Troubled debt restructurings, Financial Effect Resulting From Modifications			$ 28
Commercial Real Estate Owner Occupied [Member] | Interest rate reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	0	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	0
Troubled debt restructurings, Outstanding Recorded Investment	0	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0
Commercial Real Estate Owner Occupied [Member] | Change in Amortization Period or Maturity [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	1	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 3,143	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	3,143	0
Troubled debt restructurings, Outstanding Recorded Investment	0	3,143	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0
Commercial Real Estate Non-owner Occupied [Member] | Interest rate reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	0	1
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 759
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	759
Troubled debt restructurings, Outstanding Recorded Investment	0	0	756
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0
Commercial Real Estate Non-owner Occupied [Member] | Change in Amortization Period or Maturity [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	0	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	0
Troubled debt restructurings, Outstanding Recorded Investment	0	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0
SFR Mortgage [Member] | Interest rate reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0
Troubled debt restructurings, Outstanding Recorded Investment	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0
SFR Mortgage [Member] | Change in Amortization Period or Maturity [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	1	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 311	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	311	0
Troubled debt restructurings, Outstanding Recorded Investment	300	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0
Dairy & Livestock and Agribusiness [Member] | Interest rate reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	0	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	0
Troubled debt restructurings, Outstanding Recorded Investment	0	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0
Dairy & Livestock and Agribusiness [Member] | Change in Amortization Period or Maturity [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	1	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 1,984	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	1,984	0
Troubled debt restructurings, Outstanding Recorded Investment	0	78	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0
Consumer [Member] | Interest rate reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	0	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	0
Troubled debt restructurings, Outstanding Recorded Investment	0	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0
Consumer [Member] | Change in Amortization Period or Maturity [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	1	0	3
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 278	$ 0	$ 201
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	278	0	201
Troubled debt restructurings, Outstanding Recorded Investment	267	0	185
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0

Other Real Estate Owned - Summa

Other Real Estate Owned - Summary of Activity Related to Total OREO (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Balance, beginning of period	$ 4,527	$ 4,527
Additions	420	0
Dispositions	(4,527)	0
Valuation adjustments	0	0
Balance, end of period	$ 420	$ 4,527

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Balance, beginning of period	$ 116,564	$ 89,533
Addition due to acqusitions	549,975	27,031
Balance, end of period	$ 666,539	$ 116,564

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Summary of Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Balance of intangible assets, Gross CDI Carrying Amount, Beginning of period	$ 41,097	$ 37,940
Additions due to acquisitions	52,200	3,157
Balance of intangible assets, Gross CDI Carrying Amount, End of period	93,297	41,097	$ 37,940
Aggregate amortization expense, Gross CDI Carrying Amount	5,254	1,329	1,106
Estimated Amortization Expense:
Estimated Amortization Expense, 2019	10,798
Estimated Amortization Expense, 2020	9,352
Estimated Amortization Expense, 2021	8,240
Estimated Amortization Expense, 2022	7,126
Estimated Amortization Expense, Thereafter	18,268
Balance of intangible assets, Accumulated Amortization, Beginning of period	(34,259)	(32,930)
Balance of intangible assets, Accumulated Amortization, End of period	(39,513)	(34,259)	(32,930)
Balance of intangible assets, Net CDI Amount, Beginning of period	6,838	5,010
Balance of intangible assets, Net CDI Amount, End of period	$ 53,784	$ 6,838	$ 5,010

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Approximately weighted average remaining life of intangible assets	3 years 2 months 16 days

Premises and Equipment - Schedu

Premises and Equipment - Schedule of Premises and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Land	$ 19,929	$ 14,489
Bank premises	73,188	65,215
Furniture and equipment	29,020	25,610
Premises and equipment, gross	122,137	105,314
Accumulated depreciation and amortization	(63,944)	(59,148)
Premises and equipment, net	$ 58,193	$ 46,166

Premises and Equipment - Future

Premises and Equipment - Future Minimum Annual Rental Payments for Noncancelable Leases (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2,019	$ 9,261
2,020	5,918
2,021	4,077
2,022	2,819
2,023	1,179
Thereafter	1,707
Total	$ 24,961

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Impairment loss				$ 2,600,000
Fair value, net of selling costs, of held-for-sale asset				3,400,000
Gain on eminent domain condemnation		$ 0	$ 2,894,000
Gain on sale of property plant equipment	$ 542,000
Premises and equipment, net		58,193,000	46,166,000
Rental expense		$ 7,700,000	5,900,000	$ 5,600,000
Building [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, net			$ 450,000

Other Assets - Summary of Other

Other Assets - Summary of Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses	$ 6,393	$ 4,538
Interest rate swaps	1,938	3,211
Affordable housing investments	33,031	801
Other investments	15,995	5,977
Other assets	10,450	10,790
Total	$ 67,807	$ 25,317

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current provision:
Federal	$ 31,055	$ 44,153	$ 41,195
State	20,546	17,151	17,944
Current provision, total	51,601	61,304	59,139
Deferred provision/(benefit):
Federal	5,158	20,926	1,208
State	2,353	2,154	510
Deferred provision (benefit), total	7,511	23,080	1,718
Provision for income taxes	$ 59,112	$ 84,384	$ 60,857

Income Taxes - Schedule of In_2

Income Taxes - Schedule of Income Tax Asset (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current:
Income tax asset , Current, Total	$ 19,103	$ 14,659
Deferred:
Income tax asset , Deferred, Total	43,071	25,387
Income tax asset (liability), Total	62,174	40,046
Federal [Member]
Current:
Income tax asset , Current, Total	12,303	11,713
Deferred:
Income tax asset , Deferred, Total	27,334	16,557
State [Member]
Current:
Income tax asset , Current, Total	6,800	2,946
Deferred:
Income tax asset , Deferred, Total	$ 15,737	$ 8,830

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Tax Asset (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Bad debt and credit loss deduction	$ 22,402	$ 19,911
Net operating loss carryforward	141	207
Deferred compensation	6,109	5,501
PCI loans	2,556	3,098
California franchise tax	837	1,618
Accrued expense	4,865	1,365
Unrealized loss on investment securities, net	7,508	0
Acquired loan discounts	25,555	2,081
Other, net	2,624	1,272
Gross deferred tax asset	72,597	35,053
Deferred tax liabilities:
Depreciation	4,440	975
Intangibles—acquistions	19,843	3,404
FHLB stock	2,527	2,400
Deferred income	2,716	2,112
Unrealized gain on investment securities, net	0	775
Gross deferred tax liability	29,526	9,666
Net deferred tax asset	$ 43,071	$ 25,387

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Statutory Income Tax Rate to Consolidated Effective Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal income tax at statutory rate, rate	21.00%	35.00%	35.00%
State franchise taxes, net of federal benefit, rate	8.50%	6.90%	7.00%
Tax-exempt income, rate	(1.40%)	(2.40%)	(3.60%)
Tax credits, rate	(0.70%)	(0.60%)	(0.50%)
Deferred tax asset revalution adjustment, rate	0.00%	7.00%	0.00%
Other, net, rate	0.60%	(1.20%)	(0.40%)
Provision for income taxes, rate	28.00%	44.70%	37.50%
Federal income tax at statutory rate	$ 44,334	$ 66,078	$ 56,800
State franchise taxes, net of federal benefit	17,905	12,903	11,299
Tax-exempt income	(2,991)	(4,450)	(5,848)
Tax credits	(1,451)	(1,096)	(846)
Deferred tax asset revalution adjustment	0	13,208	0
Other, net	1,315	(2,259)	(548)
Provision for income taxes	$ 59,112	$ 84,384	$ 60,857

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Amount of unrecognized tax benefits	$ 0	$ 0	$ 1,675
Deferred tax asset revaluation adjustment	$ 0	$ 13,208	$ 0
Effective Income Tax Rate	21.00%	35.00%	35.00%

Deposits - Composition of Depos

Deposits - Composition of Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Noninterest-bearing Deposit Liabilities [Abstract]
Noninterest-bearing deposits	$ 5,204,787	$ 3,846,436
Interest-bearing deposits:
Investment checking	460,972	433,971
Money market	2,236,018	1,517,050
Savings	393,769	364,049
Time deposits	531,944	385,347
Total deposits	$ 8,827,490	$ 6,546,853
Noninterest-bearing deposits, percentage of total deposits	58.96%	58.75%
Investment checking, percentage of total deposits	5.22%	6.63%
Money market, percentage of total deposits	25.33%	23.17%
Savings, percentage of total deposits	4.46%	5.56%
Time deposits, percentage of total deposits	6.03%	5.89%
Percentage of deposit, total	100.00%	100.00%

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Deposits [Abstract]
Balance of accounts with more than $0,000 balance	$ 125,400,000	$ 108,500,000
Interest expenses on accounts with more than $0,000 balance	$ 1,100,000	$ 545,000	$ 444,000

Deposits - Scheduled Maturities

Deposits - Scheduled Maturities of Time Certificates of Deposit (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Year of maturity:
2,019	$ 398,735
2,020	70,898
2,021	46,710
2,022	5,320
2023 and thereafter	10,281
Total	$ 531,944	$ 385,347

Borrowings - Additional Informa

Borrowings - Additional Information (Detail) - USD ($)	Jan. 31, 2006	Jan. 31, 2006	Dec. 31, 2018	Dec. 31, 2006	Dec. 31, 2017
Debt Instrument [Line Items]
Funds borrowed under repurchase agreement			$ 442,255,000		$ 553,773,000
Weighted average interest rates			0.39%		0.30%
Loans at carrying value			$ 5,710,000,000		$ 3,680,000,000
Investment securities at carrying value			1,660,000,000		$ 1,910,000,000
Overnight borrowings			$ 280,000,000
Overnight borrowings with cost basis points			2.53%
Period of LIBOR		1 year
Collateral Pledged [Member]
Debt Instrument [Line Items]
Investment securities at carrying value			$ 1,660,000,000
CVB Statutory Trust III [Member] | Junior Subordinated Debenture Held by CVB Statutory Trust III [Member]
Debt Instrument [Line Items]
Trust preferred securities, offered fair value	$ 25,000,000	$ 25,000,000
Proceeds from the offering and other cash	$ 25,774,000
Maximum Period of Deferred payments of interest			20 consecutive quarters.
Trust Preferred Securities, maturity date			Mar. 15, 2036
Trust Preferred Securities, interest rate in excess of LIBOR				1.38%
Trust Preferred Securities callable date			Mar. 15, 2011

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	Nov. 07, 2018	Sep. 09, 2015	Dec. 31, 2018	Dec. 31, 2017
Contingencies And Commitments [Line Items]
Commitments to extend credit			$ 1,690,000,000	$ 924,500,000
Obligations under letters of credit			54,300,000	37,600,000
Reserve for credit risk for undisbursed commitments			9,000,000	$ 6,300,000
Available lines of credit			3,960,000,000
Loss contigency damages sought value		$ 2,000,000
amount awarded to the plaintiff	$ 1,340,000
insurance policy that covers the amount awarded to the plaintiff	5,000,000
loss contingency, amount deductible	$ 100,000
Secured [Member]
Contingencies And Commitments [Line Items]
Available lines of credit			$ 3,590,000,000

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Severance costs	$ 1,400,000	$ 1,600,000	$ 610,000
Deferred compensation agreements expenses	$ 1,100,000	1,200,000	684,000
Maximum percentage of bonus defer by individual under deferred compensation plan	100.00%
Deferred compensation plan, discretionary payments	$ 0	0	0
Deferred compensation liability	$ 20,033,000	18,223,000
Employer contribution percentage to 401(k) plan	3.00%
Employer contribution in profit-sharing plan	$ 3,500,000	3,200,000	$ 2,800,000
Executive Non-qualified Excess Plan [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred compensation liability	$ 2,400,000	$ 2,100,000
Maximum [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Maximum percentage of salary defer by individual under deferred compensation plan	75.00%

Earnings Per Share Reconcilia_3

Earnings Per Share Reconciliation - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per common share	160,000	9,000	291,000

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								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings per common share:
Net earnings	$ 43,159	$ 38,558	$ 35,373	$ 34,913	$ 17,851	$ 29,683	$ 28,373	$ 28,504	$ 152,003	$ 104,411	$ 101,429
Less: Net earnings allocated to restricted stock									429	382	421
Net earnings allocated to common shareholders									$ 151,574	$ 104,029	$ 101,008
Weighted average shares outstanding									121,670	109,409	107,282
Basic earnings per common share	$ 0.31	$ 0.30	$ 0.32	$ 0.32	$ 0.16	$ 0.27	$ 0.26	$ 0.26	$ 1.25	$ 0.95	$ 0.94
Diluted earnings per common share:
Net income allocated to common shareholders									$ 151,574	$ 104,029	$ 101,008
Weighted average shares outstanding									121,670	109,409	107,282
Incremental shares from assumed exercise of outstanding options									287	398	405
Diluted weighted average shares outstanding									121,957	109,807	107,687
Diluted earnings per common share	$ 0.31	$ 0.30	$ 0.32	$ 0.32	$ 0.16	$ 0.27	$ 0.26	$ 0.26	$ 1.24	$ 0.95	$ 0.94

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	May 31, 2008	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option plan, options outstanding		532,000	588,000
Stock options granted under Black-Scholes options pricing model		141,000
Cash received from stock option exercises		$ 1,701,000	$ 2,683,000	$ 5,151,000
Common stock, shares outstanding		140,000,017	110,184,922
Number of common shares, options exercisable		275,000
Common stock available for the granting of future options and restricted stock		8,019,000
2008 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized issuance of shares of Company common stock	9,000,000
Expiry of equity incentive plan		2,018
2008 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option plan, options outstanding		622,620	0
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses on stock option		$ 400,281	$ 399,000	$ 485,000
Stock options granted under Black-Scholes options pricing model		140,500	11,500	121,500
Vesting period		5 years
Intrinsic value of options exercised		$ 2,200,000	$ 3,800,000	$ 3,900,000
Unrecognized compensation cost related to nonvested options granted		$ 957,000
Weighted-average period for expected cost recognized		2 years 10 months 24 days
Fair value of options vested		$ 364,000	505,000	489,000
Cash received from stock option exercises		$ 1,700,000	2,700,000	5,200,000
Common stock, shares outstanding		531,916
Options exercisable lower price range		$ 7.68
Options exercisable upper price range		$ 23.69
Stock Options [Member] | Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares, options exercisable		275,416
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested options granted		$ 8,800,000
2008 Equity Incentive Plan, granted restricted stock awards		424,000
Weighted average fair value of restricted stock		$ 23.84
Period of compensation cost recognized		5 years
Amount of compensation cost recognized		$ 3,100,000	$ 2,600,000	$ 2,300,000
Restricted Stock [Member] | 2008 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2008 Equity Incentive Plan, granted restricted stock awards		424,000	73,000	166,500
Weighted average fair value of restricted stock		$ 23.84	$ 21.59	$ 16.89
Restricted Stock [Member] | 2008 Equity Incentive Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years	3 years	3 years
Restricted Stock [Member] | 2008 Equity Incentive Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		5 years	5 years	5 years

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans - Estimated Fair Value of Stock Options (Detail) - Stock Options [Member] - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	2.40%	2.20%	2.90%
Volatility	25.40%	29.60%	33.10%
Risk-free interest rate	2.90%	1.80%	1.20%
Expected life	5 years 4 months 24 days	5 years 7 months 6 days	5 years 7 months 6 days
Weighted average grant date fair value	$ 5.08	$ 5.17	$ 3.96

Stock-Based Compensation Plan_4

Stock-Based Compensation Plans - Option Activity under Company's Stock Option Plans (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)$ / sharesshares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, Number of Stock Options, Beginning Balance | shares	588
Granted, Number of Stock Options Outstanding | shares	141
Exercised, Number of Stock Options Outstanding | shares	(167)
Forfeited or expired, Number of Stock Options Outstanding | shares	(30)
Outstanding, Number of Stock Options, Ending Balance | shares	532
Vested or expected to vest, Number of Stock Options Outstanding | shares	514
Exercisable, Number of Stock Options Outstanding | shares	275
Outstanding, Weighted Average Exercise Price, Beginning Balance | $ / shares	$ 13.12
Granted, Weighted Average Exercise Price | $ / shares	23.73
Exercised, Weighted Average Exercise Price | $ / shares	10.21
Forfeited or expired, Weighted Average Exercise Price | $ / shares	15.07
Outstanding, Weighted Average Exercise Price, Ending Balance | $ / shares	16.73
Vested or expected to vest, Weighted Average Exercise Price | $ / shares	16.73
Exercisable, Weighted Average Exercise Price | $ / shares	$ 13.29
Outstanding, Weighted Average Remaining Contractual Term	6 years 3 months 4 days
Vested or expected to vest, Weighted Average Remaining Contractual Term	6 years 2 months 23 days
Exercisable, Weighted Average Remaining Contractual Term	4 years 3 months 22 days
Outstanding, Aggregate Intrinsic Value | $	$ 2,368
Vested or expected to vest, Aggregate Intrinsic Value | $	2,303
Exercisable, Aggregate Intrinsic Value | $	$ 1,915

Stock-Based Compensation Plan_5

Stock-Based Compensation Plans - Summary of Status of Company's Non-Vested Restricted Shares (Detail) - Restricted Stock [Member] shares in Thousands	12 Months Ended
	Dec. 31, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested, Shares, Beginning Balance | shares	376
Granted, Shares | shares	424
Vested, Shares | shares	(158)
Forfeited, Shares | shares	(18)
Nonvested, Shares, Ending Balance | shares	624
Nonvested, Weighted Average Fair Value, Beginning Balance | $ / shares	$ 16.82
Granted, Weighted Average Fair Value | $ / shares	23.84
Vested, Weighted Average Fair Value | $ / shares	16.50
Forfeited, Weighted Average Fair Value | $ / shares	20.57
Nonvested, Weighted Average Fair Value, Ending Balance | $ / shares	$ 21.56

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Detail) - USD ($) $ in Millions	Jan. 02, 2016	Dec. 31, 2018	Dec. 31, 2017
Regulated Operations [Abstract]
Capital conservation buffer rate	0.625%
Capital conservation buffer phase period		4 years
Capital conservation buffer rate, full implementation		2.50%
Percentage of required capital conservation buffer rate of CET1		2.50%
Capital conservation buffer phase in beginning period		Jan. 1, 2016
Capital conservation buffer phase in end period		Jan. 1, 2019
Trust-preferred securities included in Tier 1 capital		$ 25	$ 25
Additional dividends without obtaining prior approval from bank regulators declared and paid		$ 184

Regulatory Matters - Regulatory

Regulatory Matters - Regulatory Capital Amounts and Ratios for Company and Bank (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual, Amount	$ 1,263,800	$ 1,039,060
Total Capital (to Risk-Weighted Assets), Actual, Ratio	14.13%	18.01%
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount	$ 715,283	$ 461,574
Tier 1 Capital (to Risk-Weighted Assets), Actual, Amount	$ 1,191,228	$ 973,169
Tier 1 Capital (to Risk-Weighted Assets), Actual, Ratio	13.32%	16.87%
Tier 1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount	$ 536,462	$ 346,180
Common equity Tier I capital ratio, Actual, Amount	$ 1,166,228	$ 948,210
Common equity Tier I capital ratio, Actual, Ratio	13.04%	16.43%
Common equity Tier I capital ratio, For Capital Adequacy Purposes, Amount	$ 402,347	$ 259,635
Tier 1 Capital (to Average-Assets), Actual, Amount	$ 1,191,228	$ 973,169
Tier 1 Capital (to Average-Assets), Actual, Ratio	10.98%	11.88%
Tier 1 Capital (to Average-Assets), For Capital Adequacy Purposes, Amount	$ 433,834	$ 327,680
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual, Amount	$ 1,253,219	$ 1,029,126
Total Capital (to Risk-Weighted Assets), Actual, Ratio	14.03%	17.86%
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount	$ 714,601	$ 461,037
Total Capital (to Risk-Weighted Assets), Required To Be Well Capitalized, Amount	893,251	576,296
Tier 1 Capital (to Risk-Weighted Assets), Actual, Amount	$ 1,180,647	$ 963,235
Tier 1 Capital (to Risk-Weighted Assets), Actual, Ratio	13.22%	16.71%
Tier 1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount	$ 535,951	$ 345,778
Tier 1 Capital (to Risk-Weighted Assets), Required To Be Well Capitalized, Amount	714,601	461,037
Common equity Tier I capital ratio, Actual, Amount	$ 1,180,647	$ 963,235
Common equity Tier I capital ratio, Actual, Ratio	13.22%	16.71%
Common equity Tier I capital ratio, For Capital Adequacy Purposes, Amount	$ 401,963	$ 259,333
Common equity Tier I capital ratio, To Be Well Capitalized under Prompt Corrective Action Provisions, Amount	580,613	374,592
Tier 1 Capital (to Average-Assets), Actual, Amount	$ 1,180,647	$ 963,235
Tier 1 Capital (to Average-Assets), Actual, Ratio	10.90%	11.77%
Tier 1 Capital (to Average-Assets), For Capital Adequacy Purposes, Amount	$ 433,403	$ 327,397
Tier 1 Capital (to Average-Assets), Required To Be Well Capitalized, Amount	$ 541,754	$ 409,246
Minimum [Member] | Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier 1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio	6.00%	6.00%
Common equity Tier I capital ratio, For Capital Adequacy Purposes, Ratio	4.50%	4.50%
Tier 1 Capital (to Average-Assets), For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Minimum [Member] | Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Total Capital (to Risk-Weighted Assets), Required To Be Well Capitalized, Ratio	10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio	6.00%	6.00%
Tier 1 Capital (to Risk-Weighted Assets), Required To Be Well Capitalized, Ratio	8.00%	8.00%
Common equity Tier I capital ratio, For Capital Adequacy Purposes, Ratio	4.50%	4.50%
Common equity Tier I capital ratio, To Be Well Capitalized under Prompt Corrective Action Provisions, Ratio	6.50%	6.50%
Tier 1 Capital (to Average-Assets), For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier 1 Capital (to Average-Assets), Required To Be Well Capitalized, Ratio	5.00%	5.00%

Fair Value Information - Additi

Fair Value Information - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value assets transfers from Level 1 to Level 2	$ 0	$ 0
Fair value assets transfers from Level 2 to Level 1	0	0
Fair value liabilities transfers from Level 1 to Level 2	0	0
Fair value liabilities transfers from Level 2 to Level 1	$ 0	$ 0
Minimum [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Term of interest rate swap contracts by the counterparty, years	3 years
Maximum [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Term of interest rate swap contracts by the counterparty, years	30 years

Fair Value Information - Assets

Fair Value Information - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets	$ 1,938	$ 3,211
Interest rate swaps, liabilities	444,193	556,984
Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets	0	0
Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets	1,938	3,211
Interest rate swaps, liabilities	1,938	3,211
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	1,736,023	2,084,196
Total liabilities	1,938	3,211
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	44,810	55,496
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	1,474,508	1,750,909
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	214,051	273,829
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	716	751
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	1,734,085	2,080,985
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	1,938	3,211
Interest rate swaps, liabilities	1,938	3,211
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	1,736,023	2,084,196
Total liabilities	1,938	3,211
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	44,810	55,496
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	1,474,508	1,750,909
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	214,051	273,829
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	716	751
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	1,734,085	2,080,985
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	1,938	3,211
Interest rate swaps, liabilities	$ 1,938	$ 3,211

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	Dec. 31, 2018	Dec. 31, 2017
Description of assets
Total assets	$ 561	$ 74
Other Real Estate Owned [Member]
Description of assets
Total assets	0	0
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	3	0
Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	0	0
Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	478	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	12	0
Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	68	74
Level 1 [Member]
Description of assets
Total assets	0	0
Level 1 [Member] | Other Real Estate Owned [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 2 [Member]
Description of assets
Total assets	0	0
Level 2 [Member] | Other Real Estate Owned [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 3 [Member]
Description of assets
Total assets	3,478	378
Level 3 [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	0	0
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	189	0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	3,143	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	78	0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	68	378
Carrying Value [Member]
Description of assets
Total assets	3,478	378
Carrying Value [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	0	0
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	189	0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	3,143	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	78	0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	$ 68	$ 378

Fair Value Information - Estima

Fair Value Information - Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Total cash and cash equivalents	$ 163,948	$ 144,377	$ 121,633	$ 106,097
Interest-earning balances due from depository institutions	7,670	17,952
FHLB stock	17,688	17,688
Investment securities available-for-sale	1,734,085	2,080,985
Investment securities held-to-maturity	744,440	829,890
Total loans, net of allowance for loan losses	7,700,998	4,771,046
Swaps	1,938	3,211
Deposits:
Noninterest-bearing	5,204,787	3,846,436
Interest-bearing	3,622,703	2,700,417
Junior subordinated debentures	25,774	25,774
Swaps	444,193	556,984
Carrying Value [Member]
Assets
Total cash and cash equivalents	163,948	144,377
Interest-earning balances due from depository institutions	7,670	17,952
FHLB stock		17,688
Investment securities available-for-sale	1,734,085	2,080,985
Investment securities held-to-maturity	744,440	829,890
Total loans, net of allowance for loan losses	7,700,998	4,771,046
Swaps	1,938	3,211
Deposits:
Noninterest-bearing		3,846,436
Interest-bearing	3,622,703	2,700,417
Borrowings	722,255	553,773
Junior subordinated debentures	25,774	25,774
Swaps	1,938	3,211
Estimated Fair Value [Member]
Assets
Total cash and cash equivalents	163,948	144,377
Interest-earning balances due from depository institutions	7,339	17,951
FHLB stock		17,688
Investment securities available-for-sale	1,734,085	2,080,985
Investment securities held-to-maturity	721,537	819,215
Total loans, net of allowance for loan losses	7,514,964	4,678,402
Swaps	1,938	3,211
Deposits:
Noninterest-bearing		3,846,436
Interest-bearing	3,614,682	2,697,781
Borrowings	721,601	553,416
Junior subordinated debentures	21,176	18,070
Swaps	1,938	3,211
Estimated Fair Value [Member] | Level 1 [Member]
Assets
Total cash and cash equivalents	163,948	144,377
Interest-earning balances due from depository institutions	0	0
FHLB stock		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:
Noninterest-bearing		3,846,436
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	7,339	17,951
FHLB stock		17,688
Investment securities available-for-sale	1,734,085	2,080,985
Investment securities held-to-maturity	721,537	819,215
Total loans, net of allowance for loan losses	0	0
Swaps	1,938	3,211
Deposits:
Noninterest-bearing		0
Interest-bearing	3,614,682	2,697,781
Borrowings	721,601	553,416
Junior subordinated debentures	0	0
Swaps	1,938	3,211
Estimated Fair Value [Member] | Level 3 [Member]
Assets
Total cash and cash equivalents	0	0
Interest-earning balances due from depository institutions	0	0
FHLB stock		0
Investment securities available-for-sale	0	0
Investment securities held-to-maturity	0	0
Total loans, net of allowance for loan losses	7,514,964	4,678,402
Swaps	0	0
Deposits:
Noninterest-bearing		0
Interest-bearing	0	0
Borrowings	0	0
Junior subordinated debentures	21,176	18,070
Swaps	$ 0	$ 0

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Detail)	Dec. 31, 2018USD ($)Agreement	Dec. 31, 2017USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets and liabilities offset in balance sheet	$ 0
Total notional amount of the Company's swaps	$ 195,400,000	$ 198,500,000
Interest-rate Swap Agreements with Customers [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest-rate swap agreements | Agreement	73

Derivative Financial Instrume_4

Derivative Financial Instruments - Fair Value of Derivative Instruments (Detail) - Derivatives Not Designated as Hedging Instruments [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 1,938	$ 3,211
Other Assets [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	1,938	3,211
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	1,938	3,211
Other Liabilities [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 1,938	$ 3,211

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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Amount of Gain Recognized in Income on Derivative Instruments	$ 340	$ 615	$ 691
Interest Rate Swaps [Member] | Other Income [Member]
Derivatives, Fair Value [Line Items]
Amount of Gain Recognized in Income on Derivative Instruments	$ 340	$ 615	$ 691

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) - Summary of Components of OCI (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Net change in fair value recorded in accumulated OCI, Before-tax	$ (26,435)	$ (11,336)	$ (15,792)
Net change in fair value recorded in accumulated OCI, Tax effect	7,815	4,760	6,633
Net change in fair value recorded in accumulated OCI, After-tax	(18,620)	(6,576)	(9,159)
Amortization of unrealized (gains)/ losses on securities transferred from available-for-sale to held-to-maturity, Before-tax	(2,091)	(3,293)	(2,174)
Amortization of unrealized (gains)/ losses on securities transferred from available-for-sale to held-to-maturity, Tax effect	619	1,383	913
Amortization of unrealized (gains)/ losses on securities transferred from available-for-sale to held-to-maturity, After-tax	(1,472)	(1,910)	(1,261)
Net realized (gain)/loss reclassified into earnings, Before-tax	0	(402)	(548)
Net realized (gain)/loss reclassified into earnings, Tax Effect	0	169	230
Net realized (gain)/loss reclassified into earnings, After-Tax	0	(233)	(318)
Net change, Before-tax	(28,526)	(15,031)	(18,514)
Net change, Tax effect	(8,434)	(6,312)	(7,776)
Net change, After-tax	$ (20,092)	$ (8,719)	$ (10,738)

Balance Sheet Offsetting - Sche

Balance Sheet Offsetting - Schedule of Balance Sheet Offsetting (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Offsetting Assets Liabilities [Line Items]
Financial assets, Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	$ 1,938	$ 3,211
Financial liabilities, Gross Amounts Recognized in the Consolidated Balance Sheets	446,458	558,268
Financial liabilities, Gross Amounts Offset in the Consolidated Balance Sheets	(2,265)	(1,284)
Financial liabilities, Net Amounts of Assets presented in the Consolidated	444,193	556,984
Financial liabilities, Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments	2,265	1,284
Financial liabilities, Gross Amounts Not Offset in the Consolidated Balance Sheets, Collateral Pledged	(487,607)	(586,519)
Financial liabilities, Gross Amounts Not Offset in the Consolidated Balance Sheets, Net Amount	(41,149)	(28,251)
Repurchase Agreements [Member]
Offsetting Assets Liabilities [Line Items]
Financial liabilities, Gross Amounts Recognized in the Consolidated Balance Sheets	442,255	553,773
Financial liabilities, Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Financial liabilities, Net Amounts of Assets presented in the Consolidated	442,255	553,773
Financial liabilities, Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments	0	0
Financial liabilities, Gross Amounts Not Offset in the Consolidated Balance Sheets, Collateral Pledged	(487,607)	(573,759)
Financial liabilities, Gross Amounts Not Offset in the Consolidated Balance Sheets, Net Amount	(45,352)	(19,986)
Interest Rate Swaps [Member]
Offsetting Assets Liabilities [Line Items]
Financial assets, Gross Amounts Recognized in the Consolidated Balance Sheets	1,938	3,211
Financial assets, Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Financial assets, Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	0	0
Financial assets, Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments	1,938	3,211
Financial assets, Gross Amounts Not Offset in the Consolidated Balance Sheets, Collateral Pledged	0	0
Financial assets, Gross Amounts Not Offset in the Consolidated Balance Sheets, Net Amount	1,938	3,211
Interest Rate Swaps [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Offsetting Assets Liabilities [Line Items]
Financial assets, Gross Amounts Recognized in the Consolidated Balance Sheets	1,938	3,211
Financial assets, Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Financial assets, Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	0	0
Financial assets, Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments	1,938	3,211
Financial assets, Gross Amounts Not Offset in the Consolidated Balance Sheets, Collateral Pledged	0	0
Financial assets, Gross Amounts Not Offset in the Consolidated Balance Sheets, Net Amount	1,938	3,211
Financial liabilities, Gross Amounts Recognized in the Consolidated Balance Sheets	4,203	4,495
Financial liabilities, Gross Amounts Offset in the Consolidated Balance Sheets	(2,265)	(1,284)
Financial liabilities, Net Amounts of Assets presented in the Consolidated	1,938	3,211
Financial liabilities, Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments	2,265	1,284
Financial liabilities, Gross Amounts Not Offset in the Consolidated Balance Sheets, Collateral Pledged	0	(12,760)
Financial liabilities, Gross Amounts Not Offset in the Consolidated Balance Sheets, Net Amount	$ 4,203	$ (8,265)

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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Noninterest income:
Gain on OREO, net	$ 3,546	$ 6	$ (20)
Other	6,588	9,632	4,277
Total noninterest income	43,481	42,118	35,552
Service Charges on Deposit Accounts [Member]
Noninterest income:
Revenue from contract with customer	17,070	15,809	15,066
Trust and Investment Services [Member]
Noninterest income:
Revenue from contract with customer	8,774	9,845	9,595
Bankcard Services [Member]
Noninterest income:
Revenue from contract with customer	3,485	3,406	2,921
Accounting Standards Update 2014-09 [Member]
Noninterest income:
Gain on OREO, net	3,546	6	(20)
Other	6,588	4,888	3,457
Total noninterest income	39,463	33,954	31,019
Accounting Standards Update 2014-09 [Member] | Service Charges on Deposit Accounts [Member]
Noninterest income:
Revenue from contract with customer	17,070	15,809	15,066
Accounting Standards Update 2014-09 [Member] | Trust and Investment Services [Member]
Noninterest income:
Revenue from contract with customer	8,774	9,845	9,595
Accounting Standards Update 2014-09 [Member] | Bankcard Services [Member]
Noninterest income:
Revenue from contract with customer	3,485	3,406	2,921
Accounting Standards Update 2014-09 Not Adopted [Member]
Noninterest income:
Total noninterest income	$ 4,018	$ 8,164	$ 4,533

Condensed Financial Informati_3

Condensed Financial Information of Parent Company - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Other assets, net	$ 67,807	$ 25,317
Total assets	11,529,153	8,270,586
Liabilities	9,677,963	7,201,320
Stockholders' equity	1,851,190	1,069,266	$ 990,862	$ 923,399
Total liabilities and stockholders' equity	11,529,153	8,270,586
Parent Company [Member]
Assets
Investment in subsidiaries	1,865,609	1,084,332
Other assets, net	31,628	26,703
Total assets	1,897,237	1,111,035
Liabilities	46,047	41,769
Stockholders' equity	1,851,190	1,069,266
Total liabilities and stockholders' equity	$ 1,897,237	$ 1,111,035

Condensed Financial Informati_4

Condensed Financial Information of Parent Company - Condensed Statements of Earnings (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Other expense, net									$ (179,911)	$ (140,753)	$ (136,740)
Net earnings	$ 43,159	$ 38,558	$ 35,373	$ 34,913	$ 17,851	$ 29,683	$ 28,373	$ 28,504	152,003	104,411	101,429
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Excess in net earnings of subsidiaries									78,601	50,253	55,192
Dividends from the Bank									77,800	57,000	49,000
Other expense, net									(4,398)	(2,842)	(2,763)
Net earnings									$ 152,003	$ 104,411	$ 101,429

Condensed Financial Informati_5

Condensed Financial Information of Parent Company - Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Adjustments to reconcile net earnings to cash used in operating activities:
Stock-based compensation	$ 3,508	$ 2,953	$ 2,803
Total adjustments	16,375	33,998	23,103
Net cash used in operating activities	168,378	138,409	124,532
Cash Flows from Investing Activities
Net cash provided by investing activities	807,656	140,035	(154,016)
Cash Flows from Financing Activities
Cash dividends on common stock	(65,966)	(57,047)	(51,625)
Proceeds from exercise of stock options	1,701	2,683	5,151
Tax benefit related to exercise of stock options	0	0	932
Repurchase of common stock	(7,760)	(1,128)	(1,907)
Net cash (used in) provided by financing activities	(956,463)	(255,700)	45,020
Net increase in cash and cash equivalents	19,571	22,744	15,536
Cash and cash equivalents, beginning of period	144,377	121,633	106,097
Cash and cash equivalents, end of period	163,948	144,377	121,633
Parent Company [Member]
Cash Flows from Operating Activities
Net earnings	152,003	104,411	101,429
Adjustments to reconcile net earnings to cash used in operating activities:
Earnings of subsidiaries	(156,401)	(107,253)	(104,192)
Tax settlement received from the Bank	0	1,577	2,557
Stock-based compensation	3,508	2,953	2,803
Other operating activities, net	(2,052)	(1,725)	(3,362)
Total adjustments	(154,945)	(104,448)	(102,194)
Net cash used in operating activities	(2,942)	(37)	(765)
Cash Flows from Investing Activities
Dividends received from the Bank	77,800	57,000	49,000
Net cash provided by investing activities	77,800	57,000	49,000
Cash Flows from Financing Activities
Cash dividends on common stock	(65,966)	(57,047)	(51,625)
Proceeds from exercise of stock options	1,701	2,683	5,151
Tax benefit related to exercise of stock options	0		932
Repurchase of common stock	(7,760)	(1,128)	(1,907)
Net cash (used in) provided by financing activities	(72,025)	(55,492)	(47,449)
Net increase in cash and cash equivalents	2,833	1,471	786
Cash and cash equivalents, beginning of period	19,217	17,746	16,960
Cash and cash equivalents, end of period	$ 22,050	$ 19,217	$ 17,746

Quarterly Financial Data - Summ

Quarterly Financial Data - Summarized Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Selected Quarterly Financial Information [Abstract]
Net interest income	$ 113,016	$ 92,820	$ 72,688	$ 70,521	$ 71,275	$ 71,739	$ 70,483	$ 65,433	$ 349,045	$ 278,930	$ 257,074
Recapture of provision for loan losses	3,000	500	(1,000)	(1,000)	(1,500)	(1,500)	(1,000)	(4,500)
Net earnings	$ 43,159	$ 38,558	$ 35,373	$ 34,913	$ 17,851	$ 29,683	$ 28,373	$ 28,504	$ 152,003	$ 104,411	$ 101,429
Basic earnings per common share	$ 0.31	$ 0.30	$ 0.32	$ 0.32	$ 0.16	$ 0.27	$ 0.26	$ 0.26	$ 1.25	$ 0.95	$ 0.94
Diluted earnings per common share	$ 0.31	$ 0.30	$ 0.32	$ 0.32	$ 0.16	$ 0.27	$ 0.26	$ 0.26	$ 1.24	$ 0.95	$ 0.94