CVB Financial (CVBF) 10-Q 9 Aug 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 29, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Trading Symbol	CVBF
Entity Registrant Name	CVB FINANCIAL CORP
Entity Central Index Key	354,647
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		107,957,513

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 107,779	$ 102,772
Interest-earning balances due from Federal Reserve and federal funds sold	591,403	3,325
Total cash and cash equivalents	699,182	106,097
Interest-earning balances due from depository institutions	91,272	32,691
Investment securities available-for-sale, at fair value (with amortized cost of $2,181,478 at June 30, 2016, and $2,337,715 at December 31, 2015)	2,248,032	2,368,646
Investment securities held-to-maturity (with fair value of $743,481 at June 30, 2016, and $853,039 at December 31, 2015)	724,357	850,989
Total investment securities	2,972,389	3,219,635
Investment in stock of Federal Home Loan Bank (FHLB)	17,688	17,588
Loans and lease finance receivables	4,237,928	4,016,937
Allowance for loan losses	(60,938)	(59,156)
Net loans and lease finance receivables	4,176,990	3,957,781
Premises and equipment, net	39,702	31,382
Bank owned life insurance	133,231	130,956
Accrued interest receivable	21,389	22,732
Intangibles	5,586	2,265
Goodwill	88,174	74,244
Income taxes	27,693	47,251
Other assets	39,011	28,578
Total assets	8,312,307	7,671,200
Deposits:
Noninterest-bearing	3,666,206	3,250,174
Interest-bearing	2,919,780	2,667,086
Total deposits	6,585,986	5,917,260
Customer repurchase agreements	590,465	690,704
Other borrowings	0	46,000
Deferred compensation	11,920	11,269
Junior subordinated debentures	25,774	25,774
Payable for securities purchased	44,723	1,696
Other liabilities	61,976	55,098
Total liabilities	7,320,844	6,747,801
Commitments and Contingencies
Stockholders' Equity
Common stock, authorized, 225,000,000 shares without par; issued and outstanding 107,946,952 at June 30, 2016, and 106,384,982 at December 31, 2015	527,452	502,571
Retained earnings	422,939	399,919
Accumulated other comprehensive income, net of tax	41,072	20,909
Total stockholders' equity	991,463	923,399
Total liabilities and stockholders' equity	$ 8,312,307	$ 7,671,200

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Amortized cost	$ 2,181,478	$ 2,337,715
Fair Value, Held-to-maturity	$ 743,481	$ 853,039
Common stock, par value
Common stock, authorized	225,000,000	225,000,000
Common stock, shares issued	107,946,952	106,384,982
Common stock, shares outstanding	107,946,952	106,384,982

Condensed Consolidated Statemen

Condensed Consolidated Statements of Earnings and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest income:
Loans and leases, including fees	$ 50,257	$ 45,322	$ 96,027	$ 90,864
Investment securities:
Investment securities available-for-sale	12,018	17,503	24,817	35,437
Investment securities held-to-maturity	4,743	36	10,091	74
Total investment income	16,761	17,539	34,908	35,511
Dividends from FHLB stock	439	1,414	807	1,883
Federal funds sold	383	187	488	329
Interest-earning deposits with other institutions	175	53	285	108
Total interest income	68,015	64,515	132,515	128,695
Interest expense:
Deposits	1,582	1,307	3,019	2,600
Borrowings	345	342	768	2,115
Junior subordinated debentures	132	108	256	213
Total interest expense	2,059	1,757	4,043	4,928
Net interest income before recapture of provision for loan losses	65,956	62,758	128,472	123,767
Recapture of provision for loan losses	0	(2,000)	0	(2,000)
Net interest income after recapture of provision for loan losses	65,956	64,758	128,472	125,767
Noninterest income:
Service charges on deposit accounts	3,822	3,952	7,569	7,913
Trust and investment services	2,508	2,181	4,711	4,332
Bankcard services	784	842	1,339	1,575
BOLI income	752	808	1,299	1,457
Gain on sale of loans	0	0	1,101	0
Other	1,408	562	1,938	1,079
Total noninterest income	9,274	8,345	17,957	16,356
Noninterest expense:
Salaries and employee benefits	21,558	19,648	42,811	38,943
Occupancy and equipment	4,125	3,713	7,838	7,365
Professional services	1,188	1,527	2,554	2,680
Software licenses and maintenance	1,065	993	1,974	2,023
Promotion	1,192	1,201	2,619	2,528
Recapture of provision for unfunded loan commitments	0	0	0	(500)
Debt termination expense	16	0	16	13,870
Acquisition related expenses	355	0	1,204	0
Other	4,939	4,451	9,786	9,096
Total noninterest expense	34,438	31,533	68,802	76,005
Earnings before income taxes	40,792	41,570	77,627	66,118
Income taxes	15,278	14,757	28,722	23,472
Net earnings	25,514	26,813	48,905	42,646
Other comprehensive income (loss):
Unrealized gain (loss) on securities arising during the period, before tax	7,493	(32,968)	34,763	(12,698)
Less: Income tax (expense) benefit related to items of other comprehensive income	(3,147)	13,846	(14,600)	5,332
Net change, After-tax	4,346	(19,122)	20,163	(7,366)
Comprehensive income	$ 29,860	$ 7,691	$ 69,068	$ 35,280
Basic earnings per common share	$ 0.23	$ 0.25	$ 0.46	$ 0.40
Diluted earnings per common share	0.23	0.25	0.45	0.40
Cash dividends declared per common share	$ 0.12	$ 0.12	$ 0.24	$ 0.24

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning balance at Dec. 31, 2014	$ 878,109	$ 495,220	$ 351,814	$ 31,075
Beginning balance, shares at Dec. 31, 2014		105,893
Repurchase of common stock	(511)	$ (511)
Repurchase of common stock, shares		(33)
Exercise of stock options	4,500	$ 4,500
Exercise of stock options, shares		397
Tax benefit from exercise of stock options	742	$ 742
Shares issued pursuant to stock-based compensation plan	1,371	$ 1,371
Shares issued pursuant to stock-based compensation plan, shares		80
Cash dividends declared on common stock	(25,500)		(25,500)
Net earnings	42,646		42,646
Other comprehensive income (loss)	(7,366)			(7,366)
Ending balance at Jun. 30, 2015	893,991	$ 501,322	368,960	23,709
Ending balance, shares at Jun. 30, 2015		106,337
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	(408)	$ (408)
Repurchase of common stock, shares		(40)
Issuance of common stock for acquisition of County Commerce Bank	21,642	$ 21,642
Issuance of common stock for acquisition of County Commerce Bank, Shares		1,394
Exercise of stock options	2,254	$ 2,254
Exercise of stock options, shares		175
Tax benefit from exercise of stock options	86	$ 86
Shares issued pursuant to stock-based compensation plan	1,307	$ 1,307
Shares issued pursuant to stock-based compensation plan, shares		33
Cash dividends declared on common stock	(25,885)		(25,885)
Net earnings	48,905		48,905
Other comprehensive income (loss)	20,163			20,163
Ending balance at Jun. 30, 2016	$ 991,463	$ 527,452	$ 422,939	$ 41,072
Ending balance, shares at Jun. 30, 2016		107,947

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Stockholders' Equity [Abstract]
Cash dividends per common share	$ 0.12	$ 0.12	$ 0.24	$ 0.24

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities
Interest and dividends received	$ 138,664	$ 137,747
Service charges and other fees received	16,908	13,840
Interest paid	(4,030)	(5,768)
Net cash paid to vendors, employees and others	(69,730)	(68,710)
Income taxes paid	(23,000)	(27,000)
Payments to FDIC, loss share agreement	(203)	(460)
Net cash provided by operating activities	58,609	49,649
Cash Flows from Investing Activities
Proceeds from redemption of FHLB stock	1,423	7,750
Net change in interest-earning balances from depository institutions	3,755	2,740
Proceeds from repayment of investment securities available-for-sale	228,070	202,162
Proceeds from maturity of investment securities available-for-sale	56,006	54,601
Purchases of investment securities available-for-sale	(97,368)	(236,451)
Proceeds from repayment and maturity of investment securities held-to-maturity	128,497
Net (increase) decrease in loan and lease finance receivables	(54,623)	35,862
Proceeds from sale of loans	6,417
Purchase of premises and equipment	(2,045)	(485)
Proceeds from sales of other real estate owned	621	1,538
Cash used in sale of branch, net	(8,217)
Cash paid for County Commerce Bank (CCB) acquisition, net of cash acquired	(7,504)
Net cash provided by investing activities	255,032	67,717
Cash Flows from Financing Activities
Net increase in other deposits	512,784	430,912
Net decrease in time deposits	(58,754)	(41,690)
Repayment of FHLB advances	(5,000)	(200,000)
Net decrease in other borrowings	(46,000)	(46,000)
Net (decrease) increase in customer repurchase agreements	(99,818)	98,699
Cash dividends on common stock	(25,700)	(23,340)
Repurchase of common stock	(408)	(511)
Proceeds from exercise of stock options	2,254	4,500
Tax benefit related to exercise of stock options	86	742
Net cash provided by financing activities	279,444	223,312
Net increase in cash and cash equivalents	593,085	340,678
Cash and cash equivalents, beginning of period	106,097	105,768
Cash and cash equivalents, end of period	699,182	446,446
Reconciliation of Net Earnings to Net Cash Provided by Operating Activities
Net earnings	48,905	42,646
Adjustments to reconcile net earnings to net cash provided by operating activities:
Gain on sale of loans	1,101	0
Gain on sale of branch	(272)
Gain on sale of other real estate owned	(14)	(232)
Increase in bank owned life insurance	(2,275)	(2,670)
Net amortization of premiums and discounts on investment securities	10,192	9,749
Accretion of PCI discount	(1,569)	(2,012)
Recapture of provision for loan losses	0	(2,000)
Recapture of provision for unfunded loan commitments	0	(500)
Valuation adjustment on other real estate owned	337	162
Payments to FDIC, loss share agreement	(203)	(460)
Stock-based compensation	1,307	1,371
Depreciation and amortization, net	1,685	292
Change in other assets and liabilities	1,617	3,303
Total adjustments	9,704	7,003
Net cash provided by operating activities	58,609	49,649
Supplemental Disclosure of Non-cash Investing Activities
Securities purchased and not settled	44,723	59,693
Transfer of loans to other real estate owned		$ 3,666
Issuance of common stock for CCB acquisition	$ 21,642

Business

Business	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	1. BUSINESS The condensed consolidated financial statements include CVB Financial Corp. (referred to herein on an unconsolidated basis as “CVB” and on a consolidated basis as “we,” “our” or the “Company”) and its wholly owned subsidiary: Citizens Business Bank (the “Bank” or “CBB”) after elimination of all intercompany transactions and balances. The Company has one inactive subsidiary, Chino Valley Bancorp. The Company is also the common stockholder of CVB Statutory Trust III. CVB Statutory Trust III was created in January 2006 to issue trust preferred securities in order to raise capital for the Company. In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 810, Consolidation 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 San Bernardino County, Riverside County, Los Angeles County, Orange County, San Diego County, Ventura County, Santa Barbara County, and the Central Valley area of California. The Bank operates 43 Business Financial Centers, eight Commercial Banking Centers, and three trust office locations. The Company is headquartered in the city of Ontario, California. On February 29, 2016, we completed the acquisition of County Commerce Bank (“CCB”), headquartered in Ventura County 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 condensed consolidated financial statements for 2016 include CCB operations, post-merger. See Note 4 – Business Combinations, included herein.

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	2. BASIS OF PRESENTATION The accompanying unaudited condensed consolidated financial statements and notes thereto have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”) for Form 10-Q 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 (“GAAP”) for interim financial reporting. The accompanying unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments), which are necessary for a fair presentation of financial results for the interim periods presented. The results of operations for the six months ended June 30, 2016 are not necessarily indicative of the results for the full year. Certain information and note disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements, accounting policies and financial notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015, filed with the SEC. A summary of the significant accounting policies consistently applied in the preparation of the accompanying unaudited condensed consolidated financial statements follows. Reclassification

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Except as discussed below, our accounting policies are described in Note 3— Summary of Significant Accounting Policies, Use of Estimates in the Preparation of Financial Statements Recent Accounting Pronouncements

Business Combinations

Business Combinations	6 Months Ended
	Jun. 30, 2016
Business Combinations [Abstract]
Business Combinations	4. BUSINESS COMBINATIONS County Commerce Bank Acquisition On February 29, 2016, the Bank acquired all of the assets and assumed all of the liabilities of CCB for $20.6 million in cash and $21.6 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 the communities of: Ventura, Oxnard, Camarillo, and Westlake Village. The systems integration of CCB and CBB was completed in April 2016. Goodwill of $13.9 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, $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 $1.7 million 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. 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. 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 three and six months ended June 30, 2016, the Company incurred non-recurring merger related expenses associated with the CCB acquisition of $355,000 and $1.2 million, respectively.

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2016
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 publicly traded, and the estimated fair values were obtained from an independent pricing service based upon market quotes. June 30, 2016 Amortized Gross Gross Fair Value Total (Dollars in thousands) Investment securities available-for-sale: Government agency/GSE $ 4,750 $ 13 $ - $ 4,763 0.21% Residential mortgage-backed securities 1,663,091 54,359 - 1,717,450 76.40% CMO/REMIC - residential 388,881 9,015 - 397,896 17.70% Municipal bonds 119,756 2,893 (1) 122,648 5.46% Other securities 5,000 275 - 5,275 0.23% Total available-for-sale securities $ 2,181,478 $ 66,555 $ (1) $ 2,248,032 100.00% Investment securities held-to-maturity (1): Government agency/GSE $ 209,301 $ 6,336 $ - $ 215,637 28.90% Residential mortgage-backed securities 215,762 6,274 - 222,036 29.79% CMO 974 501 - 1,475 0.13% Municipal bonds 298,320 6,983 (970) 304,333 41.18% Total held-to-maturity securities $ 724,357 $ 20,094 $ (970) $ 743,481 100.00% December 31, 2015 Amortized Gross Gross Loss Fair Value Total (Dollars in thousands) Investment securities available-for-sale: Government agency/GSE $ 5,752 $ - $ (7) $ 5,745 0.24% Residential mortgage-backed securities 1,788,857 26,001 (1,761) 1,813,097 76.55% CMO/REMIC - residential 380,166 4,689 (1,074) 383,781 16.20% Municipal bonds 157,940 3,036 (3) 160,973 6.80% Other securities 5,000 50 - 5,050 0.21% Total available-for-sale securities $ 2,337,715 $ 33,776 $ (2,845) $ 2,368,646 100.00% Investment securities held-to-maturity (1): Government agency/GSE $ 293,338 $ 1,176 $ (734) $ 293,780 34.47% Residential mortgage-backed securities 232,053 - (1,293) 230,760 27.27% CMO 1,284 569 - 1,853 0.15% Municipal bonds 324,314 3,051 (719) 326,646 38.11% Total held-to-maturity securities $ 850,989 $ 4,796 $ (2,746) $ 853,039 100.00% (1) Securities held-to-maturity are presented in the condensed consolidated balance sheets at amortized cost. During the quarter ended September 30, 2015, investment securities were transferred from the available-for-sale security portfolio to the held-to-maturity security portfolio. Transfers of securities into the held-to-maturity category from the available-for-sale category are transferred at fair value at the date of transfer. The fair value of these securities at the date of transfer was $898.6 million. The unrealized holding gain or loss at the date of transfer is retained in accumulated other comprehensive income (“AOCI”) and in the carrying value of the held-to-maturity securities. The net unrealized holding gain at the date of transfer was $3.9 million after-tax and will continue to be reported in AOCI and amortized over the remaining life of the securities as a yield adjustment. At June 30, 2016, investment securities HTM totaled $724.4 million. The after-tax unrealized gain reported in AOCI on investment securities HTM was $2.5 million at June 30, 2016. 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 Three Months Ended For the Six Months Ended June 30, 2016 2015 2016 2015 (Dollars in thousands) Investment securities available-for-sale: Taxable $ 10,827 $ 12,784 $ 22,207 $ 25,707 Tax-advantaged 1,191 4,719 2,610 9,730 Investment securities held-to-maturity: Taxable 2,215 36 4,835 74 Tax-advantaged 2,528 - 5,256 - Total interest income from investment securities $ 16,761 $ 17,539 $ 34,908 $ 35,511 Approximately 86% of the total investment securities portfolio at June 30, 2016 represents securities issued by the U.S government or U.S. government-sponsored enterprises, with the implied guarantee of payment of principal and interest. All non-agency available-for-sale Collateralized Mortgage Obligations (“CMO”)/Real Estate Mortgage Investment Conduit (“REMIC”) issues held are rated investment grade or better by either Standard & Poor’s or Moody’s, as of June 30, 2016 and December 31, 2015. At June 30, 2016, the Bank had $1.1 million in total CMO backed by whole loans issued by private-label companies (nongovernment sponsored). 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 June 30, 2016 and December 31, 2015. Management has reviewed individual securities to determine whether a decline in fair value below the amortized cost basis is other-than-temporary. June 30, 2016 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: Government agency/GSE $ - $ - $ - $ - $ - $ - Residential mortgage-backed securities - - - - - - CMO/REMIC - residential - - - - - - Municipal bonds - - 5,971 (1) 5,971 (1) Other securities - - - - - - Total available-for-sale securities $ - $ - $ 5,971 $ (1) $ 5,971 $ (1) Investment securities held-to-maturity: Government agency/GSE $ - $ - $ - $ - $ - $ - Residential mortgage-backed securities - - - - - - CMO - - - - - - Municipal bonds 67,573 (970) - - 67,573 (970) Other securities - - - - - - Total held-to-maturity securities $ 67,573 $ (970) $ - $ - $ 67,573 $ (970) December 31, 2015 Less Than 12 Months 12 Months or Longer Total Fair Value Gross Fair Value Gross Unrealized Holding Losses Fair Value Gross (Dollars in thousands) Investment securities available-for-sale: Government agency/GSE $ 5,745 $ (7) $ - $ - $ 5,745 $ (7) Residential mortgage-backed securities 437,699 (1,761) - - 437,699 (1,761) CMO/REMIC - residential 171,923 (1,074) - - 171,923 (1,074) Municipal bonds 398 (2) 5,961 (1) 6,359 (3) Other securities - - - - - - Total available-for-sale securities $ 615,765 $ (2,844) $ 5,961 $ (1) $ 621,726 $ (2,845) Investment securities held-to-maturity: Government agency/GSE $ 84,495 $ (734) $ - $ - $ 84,495 $ (734) Residential mortgage-backed securities 230,760 (1,293) - - 230,760 (1,293) CMO - - - - - - Municipal bonds 110,119 (719) - - 110,119 (719) Other securities - - - - - - Total held-to-maturity securities $ 425,374 $ (2,746) $ - $ - $ 425,374 $ (2,746) At June 30, 2016 and December 31, 2015, investment securities having a carrying value of approximately $2.59 billion and $2.81 billion, respectively, were pledged to secure public deposits, short and long-term borrowings, and for other purposes as required or permitted by law. The amortized cost and fair value of debt securities at June 30, 2016, by contractual maturity, are shown in the table below. Although mortgage-backed securities and CMO/REMIC have contractual maturities through 2043, expected maturities will differ from contractual maturities because borrowers may have the right to prepay such obligations without penalty. Mortgage-backed securities and CMO/REMIC are included in maturity categories based upon estimated prepayment speeds. June 30, 2016 Available-for-sale Held-to-maturity Amortized Cost Fair Value Amortized Cost Fair Value (Dollars in thousands) Due in one year or less $ 12,202 $ 12,343 $ - $ - Due after one year through five years 1,795,806 1,851,485 167,856 171,966 Due after five years through ten years 131,286 134,700 240,842 245,295 Due after ten years 242,184 249,504 315,659 326,220 Total investment securities $ 2,181,478 $ 2,248,032 $ 724,357 $ 743,481 The investment in FHLB stock is periodically evaluated for impairment based on, among other things, the capital adequacy of the FHLB and its overall financial condition. No impairment losses have been recorded through June 30, 2016.

Acquired SJB Assets and FDIC Lo

Acquired SJB Assets and FDIC Loss Sharing Asset	6 Months Ended
	Jun. 30, 2016
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 San Joaquin Bank (“SJB”) and entered into loss sharing agreements with the Federal Deposit Insurance Corporation (“FDIC”) that is more fully discussed in Note 3— Summary of Significant Accounting Policies At June 30, 2016, the remaining discount associated with the PCI loans approximated $2.4 million. Based on the Company’s regular forecast of expected cash flows from these loans, approximately $1.0 million of the related discount is expected to accrete into interest income over the remaining average lives of the respective pools, which approximates 3 years. The loss sharing agreement for commercial loans expired October 16, 2014. 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 indicated. June 30, 2016 December 31, 2015 (Dollars in thousands) Commercial and industrial $ 2,580 $ 7,473 SBA 348 393 Real estate: Commercial real estate 70,589 81,786 Construction - - SFR mortgage 186 193 Dairy & livestock and agribusiness 503 1,429 Municipal lease finance receivables - - Consumer and other loans 1,816 2,438 Gross PCI loans 76,022 93,712 Less: Purchase accounting discount (2,430) (3,872) Gross PCI loans, net of discount 73,592 89,840 Less: Allowance for PCI loan losses (310) - Net PCI loans $ 73,282 $ 89,840 Credit Quality Indicators The following table summarizes gross PCI loans by internal risk ratings for the periods indicated. June 30, 2016 December 31, 2015 (Dollars in thousands) Pass $ 60,181 $ 76,401 Special mention 10,255 11,142 Substandard 5,586 6,169 Doubtful & loss - - Total gross PCI loans $ 76,022 $ 93,712 Allowance for Loan Losses (“ALLL”) The Company’s Credit Management Division is responsible for regularly reviewing the ALLL methodology for PCI loans. The ALLL for PCI loans is determined separately from total loans, and is based on expectations of future cash flows from the underlying pools of loans or individual loans in accordance with ASC 310-30, as more fully described in Note 3— Summary of Significant Accounting Policies

Loans and Lease Finance Receiva

Loans and Lease Finance Receivables and Allowance for Loan Losses	6 Months Ended
	Jun. 30, 2016
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. June 30, 2016 December 31, 2015 (Dollars in thousands) Commercial and industrial $ 479,133 $ 434,099 SBA 111,762 106,867 Real estate: Commercial real estate 2,884,332 2,643,184 Construction 94,009 68,563 SFR mortgage 237,488 233,754 Dairy & livestock and agribusiness 213,830 305,509 Municipal lease finance receivables 71,929 74,135 Consumer and other loans 79,725 69,278 Gross loans, excluding PCI loans 4,172,208 3,935,389 Less: Deferred loan fees, net (7,872) (8,292) Gross loans, excluding PCI loans, net of deferred loan fees 4,164,336 3,927,097 Less: Allowance for loan losses (60,628) (59,156) Net loans, excluding PCI loans 4,103,708 3,867,941 PCI Loans 76,022 93,712 Discount on PCI loans (2,430) (3,872) Less: Allowance for loan losses (310) - PCI loans, net 73,282 89,840 Total loans and lease finance receivables $ 4,176,990 $ 3,957,781 As of June 30, 2016, 69.13% of the total gross loan portfolio (excluding PCI loans) consisted of commercial real estate loans and 2.25% of the total loan portfolio consisted of construction loans. Substantially all of the Company’s real estate loans and construction loans are secured by real properties located in California. As of June 30, 2016, $190.5 million, or 6.60% of the total commercial real estate loans included loans secured by farmland, compared to $173.0 million, or 6.54%, at December 31, 2015. The loans secured by farmland included $135.6 million for loans secured by dairy & livestock land and $54.8 million for loans secured by agricultural land at June 30, 2016, compared to $128.4 million for loans secured by dairy & livestock land and $44.6 million for loans secured by agricultural land at December 31, 2015. As of June 30, 2016, dairy & livestock and agribusiness loans of $213.8 million were comprised of $200.2 million for dairy & livestock loans and $14.1 million for agribusiness loans, compared to $287.0 million for dairy & livestock loans and $18.5 million for agribusiness loans at December 31, 2015. At June 30, 2016, the Company held approximately $2.04 billion of total fixed rate loans, including PCI loans. At June 30, 2016 and December 31, 2015, loans totaling $3.13 billion and $2.91 billion, respectively, were pledged to secure the borrowings and available lines of credit from the FHLB and the Federal Reserve Bank. Credit Quality Indicators Central to our 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 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 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 basically worthless asset even though partial recovery may be effected in the future. The following table summarizes each type of loans, excluding PCI loans, according to our internal risk ratings for the periods presented. June 30, 2016 Pass Special Substandard Doubtful & Total (Dollars in thousands) Commercial and industrial $ 440,455 $ 21,264 $ 17,407 $ 7 $ 479,133 SBA 93,259 11,697 6,582 224 111,762 Real estate: Commercial real estate Owner occupied 827,887 87,431 18,617 - 933,935 Non-owner occupied 1,909,707 24,804 15,886 - 1,950,397 Construction Speculative 47,301 - 7,651 - 54,952 Non-speculative 39,057 - - - 39,057 SFR mortgage 229,984 4,965 2,539 - 237,488 Dairy & livestock and agribusiness 145,897 48,122 19,811 - 213,830 Municipal lease finance receivables 67,188 4,741 - - 71,929 Consumer and other loans 75,378 1,867 2,377 103 79,725 Total gross loans, excluding PCI loans $ 3,876,113 $ 204,891 $ 90,870 $ 334 $ 4,172,208 December 31, 2015 Pass Special Substandard Doubtful & Total (Dollars in thousands) Commercial and industrial $ 398,651 $ 33,000 $ 2,403 $ 45 $ 434,099 SBA 87,441 13,169 4,854 1,403 106,867 Real estate: Commercial real estate Owner occupied 772,114 54,758 11,481 - 838,353 Non-owner occupied 1,741,615 26,170 37,046 - 1,804,831 Construction Speculative 38,186 - 7,651 - 45,837 Non-speculative 22,726 - - - 22,726 SFR mortgage 227,207 3,556 2,991 - 233,754 Dairy & livestock and agribusiness 285,647 19,862 - - 305,509 Municipal lease finance receivables 69,194 4,941 - - 74,135 Consumer and other loans 64,844 1,618 2,708 108 69,278 Total gross loans, excluding PCI loans $ 3,707,625 $ 157,074 $ 69,134 $ 1,556 $ 3,935,389 Allowance for Loan Losses The Company’s Credit Management Division is responsible for regularly reviewing the ALLL methodology, including loss factors and economic risk factors. The Bank’s Director Loan Committee provides Board oversight of the ALLL process and approves 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 Management believes that the ALLL was appropriate at June 30, 2016 and December 31, 2015. 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 Three Months Ended June 30, 2016 Ending Charge-offs Recoveries (Recapture of) Ending (Dollars in thousands) Commercial and industrial $ 8,731 $ (24) $ 141 $ 539 $ 9,387 SBA 1,236 - 2 (61) 1,177 Real estate: Commercial real estate 38,286 - 496 1,137 39,919 Construction 1,151 - 875 (798) 1,228 SFR mortgage 2,202 - - 299 2,501 Dairy & livestock and agribusiness 5,176 - 107 (401) 4,882 Municipal lease finance receivables 1,165 - - (50) 1,115 Consumer and other loans 1,389 (1) 6 (975) 419 PCI loans - - - 310 310 Unallocated (1) - - - - - Total allowance for loan losses $ 59,336 $ (25) $ 1,627 $ - $ 60,938 For the Three Months Ended June 30, 2015 Ending Charge-offs Recoveries (Recapture of) Ending (Dollars in thousands) Commercial and industrial $ 7,502 $ - $ 197 $ (514) $ 7,185 SBA 2,196 - 3 (114) 2,085 Real estate: Commercial real estate 34,848 (107) 783 (110) 35,414 Construction 1,043 - 41 (338) 746 SFR mortgage 2,425 (215) - 354 2,564 Dairy & livestock and agribusiness 3,746 - 111 117 3,974 Municipal lease finance receivables 1,030 - - (16) 1,014 Consumer and other loans 825 (20) 52 (23) 834 Unallocated (1) 7,094 - - (1,356) 5,738 Total allowance for loan losses $ 60,709 $ (342) $ 1,187 $ (2,000) $ 59,554 For the Six Months Ended June 30, 2016 Ending Charge-offs Recoveries (Recapture of) Ending (Dollars in thousands) Commercial and industrial $ 8,588 $ (85) $ 204 $ 680 $ 9,387 SBA 993 - 3 181 1,177 Real estate: Commercial real estate 36,995 - 635 2,289 39,919 Construction 2,389 - 884 (2,045) 1,228 SFR mortgage 2,103 (102) - 500 2,501 Dairy & livestock and agribusiness 6,029 - 206 (1,353) 4,882 Municipal lease finance receivables 1,153 - - (38) 1,115 Consumer and other loans 906 (1) 38 (524) 419 PCI loans - - - 310 310 Unallocated (1) - - - - - Total allowance for loan losses $ 59,156 $ (188) $ 1,970 $ - $ 60,938 For the Six Months Ended June 30, 2015 Ending Charge-offs Recoveries (Recapture of) Ending (Dollars in thousands) Commercial and industrial $ 7,074 $ (134) $ 232 $ 13 $ 7,185 SBA 2,557 (33) 37 (476) 2,085 Real estate: Commercial real estate 33,373 (107) 1,640 508 35,414 Construction 988 - 50 (292) 746 SFR mortgage 2,344 (215) 185 250 2,564 Dairy & livestock and agribusiness 5,479 - 210 (1,715) 3,974 Municipal lease finance receivables 1,412 - - (398) 1,014 Consumer and other loans 1,262 (197) 61 (292) 834 Unallocated (1) 5,336 - - 402 5,738 Total allowance for loan losses $ 59,825 $ (686) $ 2,415 $ (2,000) $ 59,554 (1) Based upon changes to our ALLL methodology, as described in Note 3 – Summary of Significant Accounting Policies 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. June 30, 2016 Recorded Investment in Loans Allowance for Loan Losses Individually Collectively Acquired with Individually Collectively Acquired with (Dollars in thousands) Commercial and industrial $ 1,447 $ 477,686 $ - $ 526 $ 8,861 $ - SBA 3,498 108,264 - 42 1,135 - Real estate: Commercial real estate 17,908 2,866,424 - 1 39,918 - Construction 7,651 86,358 - 45 1,183 - SFR mortgage 5,734 231,754 - 13 2,488 - Dairy & livestock and agribusiness 697 213,133 - - 4,882 - Municipal lease finance receivables - 71,929 - - 1,115 - Consumer and other loans 829 78,896 - 3 416 - PCI loans - - 76,022 - - 310 Unallocated (1) - - - - - - Total $ 37,764 $ 4,134,444 $ 76,022 $ 630 $ 59,998 $ 310 June 30, 2015 Recorded Investment in Loans Allowance for Loan Losses Individually Collectively Acquired with Individually Collectively Acquired with (Dollars in thousands) Commercial and industrial $ 1,562 $ 404,861 $ - $ 435 $ 6,750 $ - SBA 3,146 117,420 - 12 2,073 - Real estate: Commercial real estate 39,981 2,529,430 - - 35,414 - Construction 7,651 39,276 - 24 722 - SFR mortgage 7,044 207,459 - 77 2,487 - Dairy & livestock and agribusiness 7,091 176,893 - - 3,974 - Municipal lease finance receivables - 74,691 - - 1,014 - Consumer and other loans 915 70,261 - 2 832 - PCI loans - - 110,746 - - - Unallocated (1) - - - - 5,738 - Total $ 67,390 $ 3,620,291 $ 110,746 $ 550 $ 59,004 $ - (1) Based upon changes to our ALLL methodology, as described in Note 3 – Summary of Significant Accounting Policies 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 Troubled Debt Restructured (“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 loan’s 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. June 30, 2016 30-59 Days 60-89 Days Total Past Nonaccrual Current Total Loans (Dollars in thousands) Commercial and industrial $ 61 $ - $ 61 $ 568 $ 478,504 479,133 SBA - - - 2,637 109,125 111,762 Real estate: Commercial real estate Owner occupied - - - 1,759 932,176 933,935 Non-owner occupied 320 - 320 9,637 1,940,440 1,950,397 Construction Speculative (2) - - - - 54,952 54,952 Non-speculative - - - - 39,057 39,057 SFR mortgage - - - 2,443 235,045 237,488 Dairy & livestock and agribusiness - - - - 213,830 213,830 Municipal lease finance receivables - - - - 71,929 71,929 Consumer and other loans 97 - 97 428 79,200 79,725 Total gross loans, excluding PCI Loans $ 478 $ - $ 478 $ 17,472 $ 4,154,258 $ 4,172,208 (1) As of June 30, 2016, $15.6 million of nonaccruing loans were current, $84,000 were 30-59 days past due, $338,000 were 60-89 days past due and $1.4 million were 90+ days past due. (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. December 31, 2015 30-59 Days 60-89 Days Total Past Nonaccrual Current Total Loans (Dollars in thousands) Commercial and industrial $ - $ - $ - $ 704 $ 433,395 $ 434,099 SBA - - - 2,567 104,300 106,867 Real estate: Commercial real estate Owner occupied - - - 4,174 834,179 838,353 Non-owner occupied 354 - 354 10,367 1,794,110 1,804,831 Construction Speculative (2) - - - - 45,837 45,837 Non-speculative - - - - 22,726 22,726 SFR mortgage 1,082 - 1,082 2,688 229,984 233,754 Dairy & livestock and agribusiness - - - - 305,509 305,509 Municipal lease finance receivables - - - - 74,135 74,135 Consumer and other loans - - - 519 68,759 69,278 Total gross loans, excluding PCI Loans $ 1,436 $ - $ 1,436 $ 21,019 $ 3,912,934 $ 3,935,389 (1) As of December 31, 2015, $7.9 million of nonaccruing loans were current, $456,000 were 30-59 days past due, $9.1 million were 60-89 days past due and $3.5 million were 90+ days past due. (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. Impaired Loans At June 30, 2016, the Company had impaired loans, excluding PCI loans, of $37.8 million. Of this amount, there was $11.4 million of nonaccrual commercial real estate loans, $2.6 million of nonaccrual Small Business Administration (“SBA”) loans, $2.4 million of nonaccrual single-family residential (“SFR”) mortgage loans, $568,000 of nonaccrual commercial and industrial loans, and $428,000 of nonaccrual consumer and other loans. These impaired loans included $32.3 million of loans whose terms were modified in a troubled debt restructuring, of which $12.0 million were classified as nonaccrual. The remaining balance of $20.3 million consisted of 31 loans performing according to the restructured terms. The impaired loans had a specific allowance of $630,000 at June 30, 2016. At December 31, 2015, the Company had classified as impaired, loans, excluding PCI loans, with a balance of $63.7 million with a related allowance of $669,000. 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 Six Months Ended June 30, 2016 Recorded Unpaid Related Average Interest Income (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 840 $ 1,727 $ - $ 904 $ 14 SBA 3,266 4,026 - 3,347 25 Real estate: Commercial real estate Owner occupied 4,386 5,573 - 4,623 87 Non-owner occupied 12,522 15,110 - 12,760 83 Construction Speculative - - - - - Non-speculative - - - - - SFR mortgage 5,464 6,331 - 5,591 60 Dairy & livestock and agribusiness 697 697 - 709 17 Municipal lease finance receivables - - - - - Consumer and other loans 816 1,373 - 845 8 Total 27,991 34,837 - 28,779 294 With a related allowance recorded: Commercial and industrial 607 668 526 638 6 SBA 232 250 42 238 6 Real estate: Commercial real estate Owner occupied 1,000 1,000 1 392 28 Non-owner occupied - - - - - Construction Speculative 7,651 7,651 45 7,651 193 Non-speculative - - - - - SFR mortgage 270 270 13 277 3 Dairy & livestock and agribusiness - - - - - Municipal lease finance receivables - - - - - Consumer and other loans 13 13 3 13 - Total 9,773 9,852 630 9,209 236 Total impaired loans $ 37,764 $ 44,689 $ 630 $ 37,988 $ 530 As of and For the Six Months Ended June 30, 2015 Recorded Unpaid Related Average Interest Income (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 1,097 $ 1,941 $ - $ 1,172 $ 15 SBA 3,087 3,688 - 3,167 26 Real estate: Commercial real estate Owner occupied 5,987 7,080 - 5,865 127 Non-owner occupied 33,994 39,946 - 34,567 838 Construction Speculative - - - - - Non-speculative - - - - - SFR mortgage 6,228 7,175 - 6,102 50 Dairy & livestock and agribusiness 7,091 7,559 - 7,269 167 Municipal lease finance receivables - - - - - Consumer and other loans 906 1,426 - 940 8 Total 58,390 68,815 - 59,082 1,231 With a related allowance recorded: Commercial and industrial 465 536 435 478 1 SBA 59 59 12 63 - Real estate: Commercial real estate Owner occupied - - - - - Non-owner occupied - - - - - Construction Speculative 7,651 7,651 24 7,651 192 Non-speculative - - - - - SFR mortgage 816 824 77 826 3 Dairy & livestock and agribusiness - - - - - Municipal lease finance receivables - - - - - Consumer and other loans 9 14 2 10 - Total 9,000 9,084 550 9,028 196 Total impaired loans $ 67,390 $ 77,899 $ 550 $ 68,110 $ 1,427 As of December 31, 2015 Recorded Unpaid Related (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 1,017 $ 1,894 $ - SBA 3,207 3,877 - Real estate: Commercial real estate Owner occupied 6,252 7,445 - Non-owner occupied 34,041 37,177 - Construction Speculative - - - Non-speculative - - - SFR mortgage 5,665 6,453 - Dairy & livestock and agribusiness 3,685 3,684 - Municipal lease finance receivables - - - Consumer and other loans 890 1,454 - Total 54,757 61,984 - With a related allowance recorded: Commercial and industrial 626 695 626 SBA 41 47 10 Real estate: Commercial real estate Owner occupied - - - Non-owner occupied - - - Construction Speculative 7,651 7,651 13 Non-speculative - - - SFR mortgage 588 640 20 Dairy & livestock and agribusiness - - - Municipal lease finance receivables - - - Consumer and other loans 43 45 - Total 8,949 9,078 669 Total impaired loans $ 63,706 $ 71,062 $ 669 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 June 30, 2016 and December 31, 2015 have already been written down to the estimated net realizable value. The impaired loans with a related allowance recorded are on nonaccrual loans where a charge-off is not yet processed, on nonaccrual SFR 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. There was no provision or recapture of provision for unfunded loan commitments for the three and six months ended June 30, 2016, compared to zero and a $500,000 recapture of provision for unfunded loan commitments for the three and six months ended June 30, 2015, respectively. As of June 30, 2016 and December 31, 2015, the balance in this reserve was $7.2 million and was included in other liabilities. Troubled Debt Restructurings (“TDRs”) 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 As of June 30, 2016, there were $32.3 million of loans classified as a TDR, of which $12.0 million were nonperforming and $20.3 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 June 30, 2016, performing TDRs were comprised of one construction loan of $7.7 million, nine commercial real estate loans of $6.5 million, 11 SFR mortgage loans of $3.3 million, six commercial and industrial loans of $879,000, two SBA loans of $861,000, one dairy & livestock and agribusiness loan of $697,000 and one consumer loan of $401,000. There were no loans removed from TDR classification during the three and six months ended June 30, 2016 and 2015. 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 $609,000 and $607,000 of specific allowance to TDRs as of June 30, 2016 and December 31, 2015, respectively. The following table provides a summary of the activity related to TDRs for the periods presented. For the Three Months Ended For the Six Months Ended 2016 2015 2016 2015 (Dollars in thousands) Performing TDRs: Beginning balance $ 37,321 $ 45,376 $ 42,687 $ 53,589 New modifications 112 30 1,118 30 Payoffs and payments, net (17,141) (240) (23,513) (8,969) TDRs returned to accrual status - - - 516 TDRs placed on nonaccrual status - - - - Ending balance $ 20,292 $ 45,166 $ 20,292 $ 45,166 Nonperforming TDRs: Beginning balance $ 12,360 $ 16,774 $ 12,622 $ 20,285 New modifications - 330 82 330 Charge-offs - - (38) - Transfer to OREO - - - (842) Payoffs and payments, net (331) (842) (637) (4,090) TDRs returned to accrual status - (1,095) - (516) TDRs placed on nonaccrual status - - - - Ending balance $ 12,029 $ 15,167 $ 12,029 $ 15,167 Total TDRs $ 32,321 $ 60,333 $ 32,321 $ 60,333 The following tables summarize loans modified as troubled debt restructurings for the periods presented. Modifications (1) For the Three Months Ended June 30, 2016 Number of Pre-Modification Recorded Investment Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity 1 112 112 110 - SBA: 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 - - - - - Non-owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Total loans 1 $ 112 $ 112 $ 110 $ - For the Three Months Ended June 30, 2015 Number of Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity 1 30 30 30 - SBA: Interest rate reduction - - - - - Change in amortization period or maturity 1 330 330 330 12 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 - - - - - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Total loans 2 $ 360 $ 360 $ 360 $ 12 For the Six Months Ended June 30, 2016 Number of Pre-Modification Recorded Investment Post-Modification Outstanding Financial Effect Resulting From (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity 1 112 112 110 - SBA: Interest rate reduction - - - - - Change in amortization period or maturity 1 194 194 190 28 Real estate: Commercial real estate: Owner occupied Interest rate reduction - - - - - Change in amortization period or maturity 2 812 812 761 - Non-owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity 2 82 82 72 - Total loans 6 $ 1,200 $ 1,200 $ 1,133 $ 28 For the Six Months Ended June 30, 2015 Number of Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity 1 30 30 30 - SBA: Interest rate reduction - - - - - Change in amortization period or maturity 1 330 330 330 12 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 - - - - - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Total loans 2 $ 360 $ 360 $ 360 $ 12 (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 June 30, 2016, there were no loans that were previously modified as a TDR within the previous 12 months that subsequently defaulted during the three and six months ended June 30, 2016.

Earnings Per Share Reconciliati

Earnings Per Share Reconciliation	6 Months Ended
	Jun. 30, 2016
Earnings Per Share [Abstract]
Earnings Per Share Reconciliation	8. 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 tax-effected shares issuable upon the assumed exercise of outstanding common stock options. Antidilutive common shares are not included in the calculation of diluted earnings per common share. For the three and six months ended June 30, 2016, shares deemed to be antidilutive, and thus excluded from the computation of earnings per common share were 262,000 and 267,000, respectively. For the three and six months ended June 30, 2015, shares deemed to be antidilutive, and thus excluded from the computation of earnings per common share were 254,000 and 228,000, 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 Three Months For the Six Months Ended June 30, Ended June 30, 2016 2015 2016 2015 (In thousands, except per share amounts) Earnings per common share: Net earnings $ 25,514 $ 26,813 $ 48,905 $ 42,646 Less: Net earnings allocated to restricted stock 99 143 205 223 Net earnings allocated to common shareholders $ 25,415 $ 26,670 $ 48,700 $ 42,423 Weighted average shares outstanding 108,834 105,707 106,917 105,616 Basic earnings per common share $ 0.23 $ 0.25 $ 0.46 $ 0.40 Diluted earnings per common share: Net income allocated to common shareholders $ 25,415 $ 26,670 $ 48,700 $ 42,423 Weighted average shares outstanding 108,834 105,707 106,917 105,616 Incremental shares from assumed exercise of outstanding options 410 451 406 445 Diluted weighted average shares outstanding 109,244 106,158 107,323 106,061 Diluted earnings per common share $ 0.23 $ 0.25 $ 0.45 $ 0.40

Fair Value Information

Fair Value Information	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Information	9. 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 June 30, 2016. 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 - Observable and unobservable inputs are the key elements that separate the levels in the fair value hierarchy. Inputs here refer explicitly to the types of information used to obtain the fair value of the asset or liability. Observable inputs include data sources and market prices available and visible outside of the entity. While there will continue to be judgments required when an active market price is not available, these inputs are external to the entity and observable outside the entity; they are consequently considered more objective than internal unobservable inputs used for Level 3 fair value. Unobservable inputs are data and analyses that are developed within the entity to assess the fair value, such as management estimates of future benefits from use of assets. There were no transfers in and out of Level 1 and Level 2 during the six months ended June 30, 2016 and 2015. 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 Quoted Prices in Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Government agency/GSE $ 4,763 $ - $ 4,763 $ - Residential mortgage-backed securities 1,717,450 - 1,717,450 - CMO/REMIC - residential 397,896 - 397,896 - Municipal bonds 122,648 - 122,648 - Other securities 5,275 - 5,275 - Total investment securities - AFS 2,248,032 - 2,248,032 - Interest rate swaps 15,161 - 15,161 - Total assets $ 2,263,193 $ - $ 2,263,193 $ - Description of liability Interest rate swaps $ 15,161 $ - $ 15,161 $ - Total liabilities $ 15,161 $ - $ 15,161 $ - Carrying Value at Quoted Prices in Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Government agency/GSE $ 5,745 $ - $ 5,745 $ - Residential mortgage-backed securities 1,813,097 - 1,813,097 - CMO/REMIC - residential 383,781 - 383,781 - Municipal bonds 160,973 - 160,973 - Other securities 5,050 - 5,050 - Total investment securities - AFS 2,368,646 - 2,368,646 - Interest rate swaps 9,344 - 9,344 - Total assets $ 2,377,990 $ - $ 2,377,990 $ - Description of liability Interest rate swaps $ 9,344 $ - $ 9,344 $ - Total liabilities $ 9,344 $ - $ 9,344 $ - 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 June 30, 2016 and December 31, 2015, 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 June 30, 2016 Quoted Prices in Active Markets for Identical Assets Significant Other Significant Total Losses For the Six Months Ended June 30, 2016 (Dollars in thousands) Description of assets Impaired loans, excluding PCI loans: Commercial and industrial $ 95 $ - $ - $ 95 $ 14 SBA 232 - - 232 42 Real estate: Commercial real estate 1,000 - - 1,000 1 Construction 7,651 - - 7,651 31 SFR mortgage - - - - - Dairy & livestock and agribusiness - - - - - Consumer and other loans 13 - - 13 4 Other real estate owned 1,522 - - 1,522 337 Total assets $ 10,513 $ - $ - $ 10,513 $ 429 Carrying Value at December 31, 2015 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Total Losses For the Year Ended December 31, 2015 (Dollars in thousands ) Description of assets Impaired loans, excluding PCI loans: Commercial and industrial $ 228 $ - $ - $ 228 $ 228 SBA 41 - - 41 15 Real estate: Commercial real estate - - - - - Construction 7,651 - - 7,651 13 SFR mortgage 588 - - 588 20 Dairy & livestock and agribusiness - - - - - Consumer and other loans 258 - - 258 101 Other real estate owned 948 - - 948 162 Total assets $ 9,714 $ - $ - $ 9,714 $ 539 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 June 30, 2016 and December 31, 2015, respectively. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. June 30, 2016 Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 699,182 $ 699,182 $ - $ - $ 699,182 Interest-earning balances due from depository institutions 91,272 - 91,272 - 91,272 FHLB stock 17,688 - 17,688 - 17,688 Investment securities available-for-sale 2,248,032 - 2,248,032 - 2,248,032 Investment securities held-to-maturity 724,357 - 742,006 1,475 743,481 Total loans, net of allowance for loan losses 4,176,990 - - 4,243,374 4,243,374 Swaps 15,161 - 15,161 - 15,161 Liabilities Deposits: Noninterest-bearing $ 3,666,206 3,666,206 - - $ 3,666,206 Interest-bearing 2,919,780 - 2,919,677 - 2,919,677 Borrowings 590,465 - 590,342 - 590,342 Junior subordinated debentures 25,774 - 27,383 - 27,383 Swaps 15,161 - 15,161 - 15,161 December 31, 2015 Estimated Fair Value Carrying Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 106,097 $ 106,097 $ - $ - $ 106,097 Interest-earning balances due from depository institutions 32,691 - 32,691 - 32,691 FHLB stock 17,588 - 17,588 - 17,588 Investment securities available-for-sale 2,368,646 - 2,368,646 - 2,368,646 Investment securities held-to-maturity 850,989 - 851,186 1,853 853,039 Total loans, net of allowance for loan losses 3,957,781 - - 3,971,329 3,971,329 Swaps 9,344 - 9,344 - 9,344 Liabilities Deposits: Noninterest-bearing $ 3,250,174 3,250,174 - - $ 3,250,174 Interest-bearing 2,667,086 - 2,666,186 - 2,666,186 Borrowings 736,704 - 736,575 - 736,575 Junior subordinated debentures 25,774 - 27,210 - 27,210 Swaps 9,344 - 9,344 - 9,344 The fair value estimates presented herein are based on pertinent information available to management as of June 30, 2016 and December 31, 2015. 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.

Business Segments

Business Segments	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Business Segments	10. BUSINESS SEGMENTS The Company has identified two principal reportable segments: Business Financial and Commercial Banking Centers (“Centers”) and the Treasury Department. The Bank has 43 Business Financial Centers and eight Commercial Banking Centers organized in geographic regions, which are the focal points for customer sales and services. The Company utilizes an internal reporting system to measure the performance of various operating segments within the Bank which is the basis for determining the Bank’s reportable segments. The chief operating decision maker (currently our CEO) regularly reviews the financial information of these segments in deciding how to allocate resources and to assess performance. Centers are considered one operating segment as their products and services are similar and are sold to similar types of customers, have similar production and distribution processes, have similar economic characteristics, and have similar reporting and organizational structures. The Treasury Department’s primary focus is managing the Bank’s investments, liquidity and interest rate risk. Information related to the Company’s remaining operating segments, which include construction lending, dairy & livestock and agribusiness lending, leasing, CitizensTrust, and centralized functions have been aggregated and included in “Other.” In addition, the Company allocates internal funds to the segments using a methodology that charges users of funds interest expense and credits providers of funds interest income with the net effect of this allocation being recorded in administration. The following tables represent the selected financial information for these two business segments. GAAP does not have an authoritative body of knowledge regarding the management accounting used in presenting segment financial information. The accounting policies for each of the business units is the same as those policies identified for the consolidated Company and disclosed in Note 3 — Summary of Significant Accounting Policies The following tables present the operating results and other key financial measures for the individual operating segments for the periods presented. For the Three Months Ended June 30, 2016 Centers Treasury Other Eliminations Total (Dollars in thousands) Interest income, including loan fees $ 38,953 $ 17,779 $ 11,283 $ - $ 68,015 Credit for funds provided (1) 8,820 - 14,004 (22,824 ) - Total interest income 47,773 17,779 25,287 (22,824 ) 68,015 Interest expense 1,723 203 133 - 2,059 Charge for funds used (1) 1,467 15,629 5,728 (22,824 ) - Total interest expense 3,190 15,832 5,861 (22,824 ) 2,059 Net interest income 44,583 1,947 19,426 - 65,956 Recapture of provision for loan losses - - - - - Net interest income after recapture of provision for loan losses 44,583 1,947 19,426 - 65,956 Noninterest income 5,326 - 3,948 - 9,274 Noninterest expense 12,891 218 21,313 - 34,422 Debt termination expense - 16 - - 16 Segment pre-tax profit $ 37,018 $ 1,713 $ 2,061 $ - $ 40,792 Segment assets as of June 30, 2016 $ 6,967,395 $ 3,738,321 $ 943,289 $ (3,336,698 ) $ 8,312,307 (1) Credit for funds provided and charges for funds used are eliminated in the condensed consolidated presentation. For the Three Months Ended June 30, 2015 Centers Treasury Other Eliminations Total (Dollars in thousands) Interest income, including loan fees $ 35,813 $ 19,210 $ 9,492 $ - $ 64,515 Credit for funds provided (1) 8,530 - 13,024 (21,554 ) - Total interest income 44,343 19,210 22,516 (21,554 ) 64,515 Interest expense 1,628 31 98 - 1,757 Charge for funds used (1) 1,052 15,441 5,061 (21,554 ) - Total interest expense 2,680 15,472 5,159 (21,554 ) 1,757 Net interest income 41,663 3,738 17,357 - 62,758 Recapture of provision for loan losses - - (2,000 ) - (2,000 ) Net interest income after recapture of provision for loan losses 41,663 3,738 19,357 - 64,758 Noninterest income 5,319 - 3,026 - 8,345 Noninterest expense 12,259 211 19,063 - 31,533 Debt termination expense - - - - - Segment pre-tax profit $ 34,723 $ 3,527 $ 3,320 $ - $ 41,570 Segment assets as of June 30, 2015 $ 6,436,216 $ 3,624,321 $ 875,585 $ (3,238,764 ) $ 7,697,358 (1) Credit for funds provided and charges for funds used are eliminated in the condensed consolidated presentation. For the Six Months Ended June 30, 2016 Centers Treasury Other Eliminations Total (Dollars in thousands) Interest income, including loan fees $ 75,457 $ 36,536 $ 20,522 $ - $ 132,515 Credit for funds provided (1) 17,517 - 27,685 (45,202) - Total interest income 92,974 36,536 48,207 (45,202) 132,515 Interest expense 3,403 387 253 - 4,043 Charge for funds used (1) 2,754 30,978 11,470 (45,202) - Total interest expense 6,157 31,365 11,723 (45,202) 4,043 Net interest income 86,817 5,171 36,484 - 128,472 Recapture of provision for loan losses - - - - - Net interest income after recapture of provision for loan losses 86,817 5,171 36,484 - 128,472 Noninterest income 10,153 - 7,804 - 17,957 Noninterest expense 25,501 434 42,851 - 68,786 Debt termination expense - 16 - - 16 Segment pre-tax profit $ 71,469 $ 4,721 $ 1,437 $ - $ 77,627 Segment assets as of June 30, 2016 $ 6,967,395 $ 3,738,321 $ 943,289 $ (3,336,698) $ 8,312,307 (1) Credit for funds provided and charges for funds used are eliminated in the condensed consolidated presentation. For the Six Months Ended June 30, 2015 Centers Treasury Other Eliminations Total (Dollars in thousands) Interest income, including loan fees $ 71,181 $ 37,865 $ 19,649 $ - $ 128,695 Credit for funds provided (1) 16,741 - 25,665 (42,406) - Total interest income 87,922 37,865 45,314 (42,406) 128,695 Interest expense 3,291 1,462 175 - 4,928 Charge for funds used (1) 2,119 30,247 10,040 (42,406) - Total interest expense 5,410 31,709 10,215 (42,406) 4,928 Net interest income 82,512 6,156 35,099 - 123,767 Recapture of provision for loan losses - - (2,000) - (2,000) Net interest income after recapture of provision for loan losses 82,512 6,156 37,099 - 125,767 Noninterest income 10,386 - 5,970 - 16,356 Noninterest expense 24,108 424 37,603 - 62,135 Debt termination expense - 13,870 - - 13,870 Segment pre-tax profit (loss) $ 68,790 $ (8,138) $ 5,466 $ - $ 66,118 Segment assets as of June 30, 2015 $ 6,436,216 $ 3,624,321 $ 875,585 $ (3,238,764) $ 7,697,358 (1) Credit for funds provided and charges for funds used are eliminated in the condensed consolidated presentation.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	11. 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 June 30, 2016, the Bank has entered into 80 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 a swap with its customers to allow them to convert variable rate loans to fixed rate loans, and at the same time, the Bank enters into a swap with the counterparty bank to allow the Bank to pass on the interest-rate risk associated with fixed rate loans. 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 June 30, 2016 and December 31, 2015, the total notional amount of the Company’s swaps was $201.4 million, and $189.0 million, respectively. The location of the asset and liability, and their respective fair values are summarized in the tables below. June 30, 2016 Asset Derivatives Liability Derivatives Balance Sheet Fair Balance Sheet Fair (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 15,161 Other liabilities $ 15,161 Total derivatives $ 15,161 $ 15,161 December 31, 2015 Asset Derivatives Liability Derivatives Balance Sheet Fair Balance Sheet Fair (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 9,344 Other liabilities $ 9,344 Total derivatives $ 9,344 $ 9,344 The Effect of Derivative Financial Instruments on the Condensed Consolidated Statements of Earnings The following table summarizes the effect of derivative financial instruments on the condensed consolidated statement of earnings for the periods presented. Location of Gain Derivatives Not Designated Recognized in Income on Amount of Gain Recognized in Income on Derivative as Hedging Instruments Derivative Instruments Instruments For the Three Months Ended June 30, For the Six Months Ended June 30, 2016 2015 2016 2015 (Dollars in thousands) Interest rate swaps Other income $ 327 $ 199 $ 385 $ 199 Total $ 327 $ 199 $ 385 $ 199

Other Comprehensive Income

Other Comprehensive Income	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Other Comprehensive Income	12. OTHER COMPREHENSIVE INCOME The tables below provide a summary of the components of other comprehensive income (“OCI”) for the periods presented. For the Three Months Ended June 30, 2016 2015 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 $ 7,579 $ 3,183 $ 4,396 $ (32,968 ) $ (13,846 ) $ (19,122 ) Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity (86 ) (36 ) (50 ) - - - Net realized loss reclassified into earnings - - - - - - Net change $ 7,493 $ 3,147 $ 4,346 $ (32,968 ) $ (13,846 ) $ (19,122 ) For the Six Months Ended June 30, 2016 2015 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 $ 35,623 $ 14,961 $ 20,662 $ (12,698 ) $ (5,332 ) $ (7,366 ) Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity (860 ) (361 ) (499 ) - - - Net realized loss reclassified into earnings - - - - - - Net change $ 34,763 $ 14,600 $ 20,163 $ (12,698 ) $ (5,332 ) $ (7,366 )

Balance Sheet Offsetting

Balance Sheet Offsetting	6 Months Ended
	Jun. 30, 2016
Text Block [Abstract]
Balance Sheet Offsetting	13. 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. The repurchase agreements are not offset in the condensed consolidated balances. Gross Amounts Gross Amounts Net Amounts of Gross Amounts Not Offset in the Recognized in offset in the Assets Presented Condensed Consolidated the Condensed Condensed in the Condensed Balance Sheets Consolidated Consolidated Consolidated Financial Collateral Balance Sheets Balance Sheets Balance Sheets Instruments Pledged Net Amount (Dollars in thousands) June 30, 2016 Financial assets: Derivatives not designated as hedging instruments $ 15,161 $ - $ - $ 15,161 $ - $ 15,161 Total $ 15,161 $ - $ - $ 15,161 $ - $ 15,161 Financial liabilities: Derivatives not designated as hedging instruments $ 15,161 $ - $ 15,161 $ - $ (16,791) $ (1,630) Repurchase agreements 590,465 - 590,465 - (629,189) (38,724) Total $ 605,626 $ - $ 605,626 $ - $ (645,980) $ (40,354) December 31, 2015 Financial assets: Derivatives not designated as hedging instruments $ 9,344 $ - $ - $ 9,344 $ - $ 9,344 Total $ 9,344 $ - $ - $ 9,344 $ - $ 9,344 Financial liabilities: Derivatives not designated as hedging instruments $ 9,348 $ (4) $ 9,344 $ 4 $ (16,572) $ (7,224) Repurchase agreements 690,704 - 690,704 - (721,102) (30,398) Total $ 700,052 $ (4) $ 700,048 $ 4 $ (737,674) $ (37,622)

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
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 June 30, 2016. 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 -
Reclassification	Reclassification
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements
Recent Accounting Pronouncements	Recent Accounting Pronouncements

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Estimated Fair Value of Investment Securities	The majority of securities held are publicly traded, and the estimated fair values were obtained from an independent pricing service based upon market quotes. June 30, 2016 Amortized Gross Gross Fair Value Total (Dollars in thousands) Investment securities available-for-sale: Government agency/GSE $ 4,750 $ 13 $ - $ 4,763 0.21% Residential mortgage-backed securities 1,663,091 54,359 - 1,717,450 76.40% CMO/REMIC - residential 388,881 9,015 - 397,896 17.70% Municipal bonds 119,756 2,893 (1) 122,648 5.46% Other securities 5,000 275 - 5,275 0.23% Total available-for-sale securities $ 2,181,478 $ 66,555 $ (1) $ 2,248,032 100.00% Investment securities held-to-maturity (1): Government agency/GSE $ 209,301 $ 6,336 $ - $ 215,637 28.90% Residential mortgage-backed securities 215,762 6,274 - 222,036 29.79% CMO 974 501 - 1,475 0.13% Municipal bonds 298,320 6,983 (970) 304,333 41.18% Total held-to-maturity securities $ 724,357 $ 20,094 $ (970) $ 743,481 100.00% December 31, 2015 Amortized Gross Gross Loss Fair Value Total (Dollars in thousands) Investment securities available-for-sale: Government agency/GSE $ 5,752 $ - $ (7) $ 5,745 0.24% Residential mortgage-backed securities 1,788,857 26,001 (1,761) 1,813,097 76.55% CMO/REMIC - residential 380,166 4,689 (1,074) 383,781 16.20% Municipal bonds 157,940 3,036 (3) 160,973 6.80% Other securities 5,000 50 - 5,050 0.21% Total available-for-sale securities $ 2,337,715 $ 33,776 $ (2,845) $ 2,368,646 100.00% Investment securities held-to-maturity (1): Government agency/GSE $ 293,338 $ 1,176 $ (734) $ 293,780 34.47% Residential mortgage-backed securities 232,053 - (1,293) 230,760 27.27% CMO 1,284 569 - 1,853 0.15% Municipal bonds 324,314 3,051 (719) 326,646 38.11% Total held-to-maturity securities $ 850,989 $ 4,796 $ (2,746) $ 853,039 100.00% (1) Securities held-to-maturity are presented in the condensed consolidated balance sheets at amortized cost.
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 Three Months Ended For the Six Months Ended June 30, 2016 2015 2016 2015 (Dollars in thousands) Investment securities available-for-sale: Taxable $ 10,827 $ 12,784 $ 22,207 $ 25,707 Tax-advantaged 1,191 4,719 2,610 9,730 Investment securities held-to-maturity: Taxable 2,215 36 4,835 74 Tax-advantaged 2,528 - 5,256 - Total interest income from investment securities $ 16,761 $ 17,539 $ 34,908 $ 35,511
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 June 30, 2016 and December 31, 2015. Management has reviewed individual securities to determine whether a decline in fair value below the amortized cost basis is other-than-temporary. June 30, 2016 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: Government agency/GSE $ - $ - $ - $ - $ - $ - Residential mortgage-backed securities - - - - - - CMO/REMIC - residential - - - - - - Municipal bonds - - 5,971 (1) 5,971 (1) Other securities - - - - - - Total available-for-sale securities $ - $ - $ 5,971 $ (1) $ 5,971 $ (1) Investment securities held-to-maturity: Government agency/GSE $ - $ - $ - $ - $ - $ - Residential mortgage-backed securities - - - - - - CMO - - - - - - Municipal bonds 67,573 (970) - - 67,573 (970) Other securities - - - - - - Total held-to-maturity securities $ 67,573 $ (970) $ - $ - $ 67,573 $ (970) December 31, 2015 Less Than 12 Months 12 Months or Longer Total Fair Value Gross Fair Value Gross Unrealized Holding Losses Fair Value Gross (Dollars in thousands) Investment securities available-for-sale: Government agency/GSE $ 5,745 $ (7) $ - $ - $ 5,745 $ (7) Residential mortgage-backed securities 437,699 (1,761) - - 437,699 (1,761) CMO/REMIC - residential 171,923 (1,074) - - 171,923 (1,074) Municipal bonds 398 (2) 5,961 (1) 6,359 (3) Other securities - - - - - - Total available-for-sale securities $ 615,765 $ (2,844) $ 5,961 $ (1) $ 621,726 $ (2,845) Investment securities held-to-maturity: Government agency/GSE $ 84,495 $ (734) $ - $ - $ 84,495 $ (734) Residential mortgage-backed securities 230,760 (1,293) - - 230,760 (1,293) CMO - - - - - - Municipal bonds 110,119 (719) - - 110,119 (719) Other securities - - - - - - Total held-to-maturity securities $ 425,374 $ (2,746) $ - $ - $ 425,374 $ (2,746)
Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	Mortgage-backed securities and CMO/REMIC are included in maturity categories based upon estimated prepayment speeds. June 30, 2016 Available-for-sale Held-to-maturity Amortized Cost Fair Value Amortized Cost Fair Value (Dollars in thousands) Due in one year or less $ 12,202 $ 12,343 $ - $ - Due after one year through five years 1,795,806 1,851,485 167,856 171,966 Due after five years through ten years 131,286 134,700 240,842 245,295 Due after ten years 242,184 249,504 315,659 326,220 Total investment securities $ 2,181,478 $ 2,248,032 $ 724,357 $ 743,481

Acquired SJB Assets and FDIC 23

Acquired SJB Assets and FDIC Loss Sharing Asset (Tables)	6 Months Ended
	Jun. 30, 2016
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 indicated. June 30, 2016 December 31, 2015 (Dollars in thousands) Commercial and industrial $ 2,580 $ 7,473 SBA 348 393 Real estate: Commercial real estate 70,589 81,786 Construction - - SFR mortgage 186 193 Dairy & livestock and agribusiness 503 1,429 Municipal lease finance receivables - - Consumer and other loans 1,816 2,438 Gross PCI loans 76,022 93,712 Less: Purchase accounting discount (2,430) (3,872) Gross PCI loans, net of discount 73,592 89,840 Less: Allowance for PCI loan losses (310) - Net PCI loans $ 73,282 $ 89,840
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 indicated. June 30, 2016 December 31, 2015 (Dollars in thousands) Pass $ 60,181 $ 76,401 Special mention 10,255 11,142 Substandard 5,586 6,169 Doubtful & loss - - Total gross PCI loans $ 76,022 $ 93,712

Loans and Lease Finance Recei24

Loans and Lease Finance Receivables and Allowance for Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2016
Receivables [Abstract]
Summary of Components of Loans and Lease Finance Receivables, Excluding PCI Loans	The following table provides a summary of total loans and lease finance receivables, excluding PCI loans, by type. June 30, 2016 December 31, 2015 (Dollars in thousands) Commercial and industrial $ 479,133 $ 434,099 SBA 111,762 106,867 Real estate: Commercial real estate 2,884,332 2,643,184 Construction 94,009 68,563 SFR mortgage 237,488 233,754 Dairy & livestock and agribusiness 213,830 305,509 Municipal lease finance receivables 71,929 74,135 Consumer and other loans 79,725 69,278 Gross loans, excluding PCI loans 4,172,208 3,935,389 Less: Deferred loan fees, net (7,872) (8,292) Gross loans, excluding PCI loans, net of deferred loan fees 4,164,336 3,927,097 Less: Allowance for loan losses (60,628) (59,156) Net loans, excluding PCI loans 4,103,708 3,867,941 PCI Loans 76,022 93,712 Discount on PCI loans (2,430) (3,872) Less: Allowance for loan losses (310) - PCI loans, net 73,282 89,840 Total loans and lease finance receivables $ 4,176,990 $ 3,957,781
Summary of Loan, Excluding PCI Loans by Internal Risk Ratings	The following table summarizes each type of loans, excluding PCI loans, according to our internal risk ratings for the periods presented. June 30, 2016 Pass Special Substandard Doubtful & Total (Dollars in thousands) Commercial and industrial $ 440,455 $ 21,264 $ 17,407 $ 7 $ 479,133 SBA 93,259 11,697 6,582 224 111,762 Real estate: Commercial real estate Owner occupied 827,887 87,431 18,617 - 933,935 Non-owner occupied 1,909,707 24,804 15,886 - 1,950,397 Construction Speculative 47,301 - 7,651 - 54,952 Non-speculative 39,057 - - - 39,057 SFR mortgage 229,984 4,965 2,539 - 237,488 Dairy & livestock and agribusiness 145,897 48,122 19,811 - 213,830 Municipal lease finance receivables 67,188 4,741 - - 71,929 Consumer and other loans 75,378 1,867 2,377 103 79,725 Total gross loans, excluding PCI loans $ 3,876,113 $ 204,891 $ 90,870 $ 334 $ 4,172,208 December 31, 2015 Pass Special Substandard Doubtful & Total (Dollars in thousands) Commercial and industrial $ 398,651 $ 33,000 $ 2,403 $ 45 $ 434,099 SBA 87,441 13,169 4,854 1,403 106,867 Real estate: Commercial real estate Owner occupied 772,114 54,758 11,481 - 838,353 Non-owner occupied 1,741,615 26,170 37,046 - 1,804,831 Construction Speculative 38,186 - 7,651 - 45,837 Non-speculative 22,726 - - - 22,726 SFR mortgage 227,207 3,556 2,991 - 233,754 Dairy & livestock and agribusiness 285,647 19,862 - - 305,509 Municipal lease finance receivables 69,194 4,941 - - 74,135 Consumer and other loans 64,844 1,618 2,708 108 69,278 Total gross loans, excluding PCI loans $ 3,707,625 $ 157,074 $ 69,134 $ 1,556 $ 3,935,389
Schedule of Balance and Activity Related to Allowance for Loan Losses for Held-for-Investment Loans by Type	The following tables present the balance and activity related to the allowance for loan losses for held-for-investment loans by type for the periods presented. For the Three Months Ended June 30, 2016 Ending Charge-offs Recoveries (Recapture of) Ending (Dollars in thousands) Commercial and industrial $ 8,731 $ (24) $ 141 $ 539 $ 9,387 SBA 1,236 - 2 (61) 1,177 Real estate: Commercial real estate 38,286 - 496 1,137 39,919 Construction 1,151 - 875 (798) 1,228 SFR mortgage 2,202 - - 299 2,501 Dairy & livestock and agribusiness 5,176 - 107 (401) 4,882 Municipal lease finance receivables 1,165 - - (50) 1,115 Consumer and other loans 1,389 (1) 6 (975) 419 PCI loans - - - 310 310 Unallocated (1) - - - - - Total allowance for loan losses $ 59,336 $ (25) $ 1,627 $ - $ 60,938 For the Three Months Ended June 30, 2015 Ending Charge-offs Recoveries (Recapture of) Ending (Dollars in thousands) Commercial and industrial $ 7,502 $ - $ 197 $ (514) $ 7,185 SBA 2,196 - 3 (114) 2,085 Real estate: Commercial real estate 34,848 (107) 783 (110) 35,414 Construction 1,043 - 41 (338) 746 SFR mortgage 2,425 (215) - 354 2,564 Dairy & livestock and agribusiness 3,746 - 111 117 3,974 Municipal lease finance receivables 1,030 - - (16) 1,014 Consumer and other loans 825 (20) 52 (23) 834 Unallocated (1) 7,094 - - (1,356) 5,738 Total allowance for loan losses $ 60,709 $ (342) $ 1,187 $ (2,000) $ 59,554 For the Six Months Ended June 30, 2016 Ending Charge-offs Recoveries (Recapture of) Ending (Dollars in thousands) Commercial and industrial $ 8,588 $ (85) $ 204 $ 680 $ 9,387 SBA 993 - 3 181 1,177 Real estate: Commercial real estate 36,995 - 635 2,289 39,919 Construction 2,389 - 884 (2,045) 1,228 SFR mortgage 2,103 (102) - 500 2,501 Dairy & livestock and agribusiness 6,029 - 206 (1,353) 4,882 Municipal lease finance receivables 1,153 - - (38) 1,115 Consumer and other loans 906 (1) 38 (524) 419 PCI loans - - - 310 310 Unallocated (1) - - - - - Total allowance for loan losses $ 59,156 $ (188) $ 1,970 $ - $ 60,938 For the Six Months Ended June 30, 2015 Ending Charge-offs Recoveries (Recapture of) Ending (Dollars in thousands) Commercial and industrial $ 7,074 $ (134) $ 232 $ 13 $ 7,185 SBA 2,557 (33) 37 (476) 2,085 Real estate: Commercial real estate 33,373 (107) 1,640 508 35,414 Construction 988 - 50 (292) 746 SFR mortgage 2,344 (215) 185 250 2,564 Dairy & livestock and agribusiness 5,479 - 210 (1,715) 3,974 Municipal lease finance receivables 1,412 - - (398) 1,014 Consumer and other loans 1,262 (197) 61 (292) 834 Unallocated (1) 5,336 - - 402 5,738 Total allowance for loan losses $ 59,825 $ (686) $ 2,415 $ (2,000) $ 59,554 (1) Based upon changes to our ALLL methodology, as described in Note 3 – Summary of Significant Accounting Policies
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. June 30, 2016 Recorded Investment in Loans Allowance for Loan Losses Individually Collectively Acquired with Individually Collectively Acquired with (Dollars in thousands) Commercial and industrial $ 1,447 $ 477,686 $ - $ 526 $ 8,861 $ - SBA 3,498 108,264 - 42 1,135 - Real estate: Commercial real estate 17,908 2,866,424 - 1 39,918 - Construction 7,651 86,358 - 45 1,183 - SFR mortgage 5,734 231,754 - 13 2,488 - Dairy & livestock and agribusiness 697 213,133 - - 4,882 - Municipal lease finance receivables - 71,929 - - 1,115 - Consumer and other loans 829 78,896 - 3 416 - PCI loans - - 76,022 - - 310 Unallocated (1) - - - - - - Total $ 37,764 $ 4,134,444 $ 76,022 $ 630 $ 59,998 $ 310 June 30, 2015 Recorded Investment in Loans Allowance for Loan Losses Individually Collectively Acquired with Individually Collectively Acquired with (Dollars in thousands) Commercial and industrial $ 1,562 $ 404,861 $ - $ 435 $ 6,750 $ - SBA 3,146 117,420 - 12 2,073 - Real estate: Commercial real estate 39,981 2,529,430 - - 35,414 - Construction 7,651 39,276 - 24 722 - SFR mortgage 7,044 207,459 - 77 2,487 - Dairy & livestock and agribusiness 7,091 176,893 - - 3,974 - Municipal lease finance receivables - 74,691 - - 1,014 - Consumer and other loans 915 70,261 - 2 832 - PCI loans - - 110,746 - - - Unallocated (1) - - - - 5,738 - Total $ 67,390 $ 3,620,291 $ 110,746 $ 550 $ 59,004 $ - (1) Based upon changes to our ALLL methodology, as described in Note 3 – Summary of Significant Accounting Policies
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. June 30, 2016 30-59 Days 60-89 Days Total Past Nonaccrual Current Total Loans (Dollars in thousands) Commercial and industrial $ 61 $ - $ 61 $ 568 $ 478,504 479,133 SBA - - - 2,637 109,125 111,762 Real estate: Commercial real estate Owner occupied - - - 1,759 932,176 933,935 Non-owner occupied 320 - 320 9,637 1,940,440 1,950,397 Construction Speculative (2) - - - - 54,952 54,952 Non-speculative - - - - 39,057 39,057 SFR mortgage - - - 2,443 235,045 237,488 Dairy & livestock and agribusiness - - - - 213,830 213,830 Municipal lease finance receivables - - - - 71,929 71,929 Consumer and other loans 97 - 97 428 79,200 79,725 Total gross loans, excluding PCI Loans $ 478 $ - $ 478 $ 17,472 $ 4,154,258 $ 4,172,208 (1) As of June 30, 2016, $15.6 million of nonaccruing loans were current, $84,000 were 30-59 days past due, $338,000 were 60-89 days past due and $1.4 million were 90+ days past due. (2) Speculative construction loans are generally for properties where there is no identified buyer or renter. December 31, 2015 30-59 Days 60-89 Days Total Past Nonaccrual Current Total Loans (Dollars in thousands) Commercial and industrial $ - $ - $ - $ 704 $ 433,395 $ 434,099 SBA - - - 2,567 104,300 106,867 Real estate: Commercial real estate Owner occupied - - - 4,174 834,179 838,353 Non-owner occupied 354 - 354 10,367 1,794,110 1,804,831 Construction Speculative (2) - - - - 45,837 45,837 Non-speculative - - - - 22,726 22,726 SFR mortgage 1,082 - 1,082 2,688 229,984 233,754 Dairy & livestock and agribusiness - - - - 305,509 305,509 Municipal lease finance receivables - - - - 74,135 74,135 Consumer and other loans - - - 519 68,759 69,278 Total gross loans, excluding PCI Loans $ 1,436 $ - $ 1,436 $ 21,019 $ 3,912,934 $ 3,935,389 (1) As of December 31, 2015, $7.9 million of nonaccruing loans were current, $456,000 were 30-59 days past due, $9.1 million were 60-89 days past due and $3.5 million were 90+ days past due. (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 Six Months Ended June 30, 2016 Recorded Unpaid Related Average Interest Income (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 840 $ 1,727 $ - $ 904 $ 14 SBA 3,266 4,026 - 3,347 25 Real estate: Commercial real estate Owner occupied 4,386 5,573 - 4,623 87 Non-owner occupied 12,522 15,110 - 12,760 83 Construction Speculative - - - - - Non-speculative - - - - - SFR mortgage 5,464 6,331 - 5,591 60 Dairy & livestock and agribusiness 697 697 - 709 17 Municipal lease finance receivables - - - - - Consumer and other loans 816 1,373 - 845 8 Total 27,991 34,837 - 28,779 294 With a related allowance recorded: Commercial and industrial 607 668 526 638 6 SBA 232 250 42 238 6 Real estate: Commercial real estate Owner occupied 1,000 1,000 1 392 28 Non-owner occupied - - - - - Construction Speculative 7,651 7,651 45 7,651 193 Non-speculative - - - - - SFR mortgage 270 270 13 277 3 Dairy & livestock and agribusiness - - - - - Municipal lease finance receivables - - - - - Consumer and other loans 13 13 3 13 - Total 9,773 9,852 630 9,209 236 Total impaired loans $ 37,764 $ 44,689 $ 630 $ 37,988 $ 530 As of and For the Six Months Ended June 30, 2015 Recorded Unpaid Related Average Interest Income (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 1,097 $ 1,941 $ - $ 1,172 $ 15 SBA 3,087 3,688 - 3,167 26 Real estate: Commercial real estate Owner occupied 5,987 7,080 - 5,865 127 Non-owner occupied 33,994 39,946 - 34,567 838 Construction Speculative - - - - - Non-speculative - - - - - SFR mortgage 6,228 7,175 - 6,102 50 Dairy & livestock and agribusiness 7,091 7,559 - 7,269 167 Municipal lease finance receivables - - - - - Consumer and other loans 906 1,426 - 940 8 Total 58,390 68,815 - 59,082 1,231 With a related allowance recorded: Commercial and industrial 465 536 435 478 1 SBA 59 59 12 63 - Real estate: Commercial real estate Owner occupied - - - - - Non-owner occupied - - - - - Construction Speculative 7,651 7,651 24 7,651 192 Non-speculative - - - - - SFR mortgage 816 824 77 826 3 Dairy & livestock and agribusiness - - - - - Municipal lease finance receivables - - - - - Consumer and other loans 9 14 2 10 - Total 9,000 9,084 550 9,028 196 Total impaired loans $ 67,390 $ 77,899 $ 550 $ 68,110 $ 1,427 As of December 31, 2015 Recorded Unpaid Related (Dollars in thousands) With no related allowance recorded: Commercial and industrial $ 1,017 $ 1,894 $ - SBA 3,207 3,877 - Real estate: Commercial real estate Owner occupied 6,252 7,445 - Non-owner occupied 34,041 37,177 - Construction Speculative - - - Non-speculative - - - SFR mortgage 5,665 6,453 - Dairy & livestock and agribusiness 3,685 3,684 - Municipal lease finance receivables - - - Consumer and other loans 890 1,454 - Total 54,757 61,984 - With a related allowance recorded: Commercial and industrial 626 695 626 SBA 41 47 10 Real estate: Commercial real estate Owner occupied - - - Non-owner occupied - - - Construction Speculative 7,651 7,651 13 Non-speculative - - - SFR mortgage 588 640 20 Dairy & livestock and agribusiness - - - Municipal lease finance receivables - - - Consumer and other loans 43 45 - Total 8,949 9,078 669 Total impaired loans $ 63,706 $ 71,062 $ 669
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 Three Months Ended For the Six Months Ended 2016 2015 2016 2015 (Dollars in thousands) Performing TDRs: Beginning balance $ 37,321 $ 45,376 $ 42,687 $ 53,589 New modifications 112 30 1,118 30 Payoffs and payments, net (17,141) (240) (23,513) (8,969) TDRs returned to accrual status - - - 516 TDRs placed on nonaccrual status - - - - Ending balance $ 20,292 $ 45,166 $ 20,292 $ 45,166 Nonperforming TDRs: Beginning balance $ 12,360 $ 16,774 $ 12,622 $ 20,285 New modifications - 330 82 330 Charge-offs - - (38) - Transfer to OREO - - - (842) Payoffs and payments, net (331) (842) (637) (4,090) TDRs returned to accrual status - (1,095) - (516) TDRs placed on nonaccrual status - - - - Ending balance $ 12,029 $ 15,167 $ 12,029 $ 15,167 Total TDRs $ 32,321 $ 60,333 $ 32,321 $ 60,333
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 Three Months Ended June 30, 2016 Number of Pre-Modification Recorded Investment Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity 1 112 112 110 - SBA: 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 - - - - - Non-owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Total loans 1 $ 112 $ 112 $ 110 $ - For the Three Months Ended June 30, 2015 Number of Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity 1 30 30 30 - SBA: Interest rate reduction - - - - - Change in amortization period or maturity 1 330 330 330 12 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 - - - - - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Total loans 2 $ 360 $ 360 $ 360 $ 12 For the Six Months Ended June 30, 2016 Number of Pre-Modification Recorded Investment Post-Modification Outstanding Financial Effect Resulting From (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity 1 112 112 110 - SBA: Interest rate reduction - - - - - Change in amortization period or maturity 1 194 194 190 28 Real estate: Commercial real estate: Owner occupied Interest rate reduction - - - - - Change in amortization period or maturity 2 812 812 761 - Non-owner occupied Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity 2 82 82 72 - Total loans 6 $ 1,200 $ 1,200 $ 1,133 $ 28 For the Six Months Ended June 30, 2015 Number of Pre-Modification Post-Modification Outstanding Financial Effect (Dollars in thousands) Commercial and industrial: Interest rate reduction - $ - $ - $ - $ - Change in amortization period or maturity 1 30 30 30 - SBA: Interest rate reduction - - - - - Change in amortization period or maturity 1 330 330 330 12 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 - - - - - Consumer: Interest rate reduction - - - - - Change in amortization period or maturity - - - - - Total loans 2 $ 360 $ 360 $ 360 $ 12 (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.

Earnings Per Share Reconcilia25

Earnings Per Share Reconciliation (Tables)	6 Months Ended
	Jun. 30, 2016
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 Three Months For the Six Months Ended June 30, Ended June 30, 2016 2015 2016 2015 (In thousands, except per share amounts) Earnings per common share: Net earnings $ 25,514 $ 26,813 $ 48,905 $ 42,646 Less: Net earnings allocated to restricted stock 99 143 205 223 Net earnings allocated to common shareholders $ 25,415 $ 26,670 $ 48,700 $ 42,423 Weighted average shares outstanding 108,834 105,707 106,917 105,616 Basic earnings per common share $ 0.23 $ 0.25 $ 0.46 $ 0.40 Diluted earnings per common share: Net income allocated to common shareholders $ 25,415 $ 26,670 $ 48,700 $ 42,423 Weighted average shares outstanding 108,834 105,707 106,917 105,616 Incremental shares from assumed exercise of outstanding options 410 451 406 445 Diluted weighted average shares outstanding 109,244 106,158 107,323 106,061 Diluted earnings per common share $ 0.23 $ 0.25 $ 0.45 $ 0.40

Fair Value Information (Tables)

Fair Value Information (Tables)	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on 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 Quoted Prices in Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Government agency/GSE $ 4,763 $ - $ 4,763 $ - Residential mortgage-backed securities 1,717,450 - 1,717,450 - CMO/REMIC - residential 397,896 - 397,896 - Municipal bonds 122,648 - 122,648 - Other securities 5,275 - 5,275 - Total investment securities - AFS 2,248,032 - 2,248,032 - Interest rate swaps 15,161 - 15,161 - Total assets $ 2,263,193 $ - $ 2,263,193 $ - Description of liability Interest rate swaps $ 15,161 $ - $ 15,161 $ - Total liabilities $ 15,161 $ - $ 15,161 $ - Carrying Value at Quoted Prices in Significant Other Significant (Dollars in thousands) Description of assets Investment securities - AFS: Government agency/GSE $ 5,745 $ - $ 5,745 $ - Residential mortgage-backed securities 1,813,097 - 1,813,097 - CMO/REMIC - residential 383,781 - 383,781 - Municipal bonds 160,973 - 160,973 - Other securities 5,050 - 5,050 - Total investment securities - AFS 2,368,646 - 2,368,646 - Interest rate swaps 9,344 - 9,344 - Total assets $ 2,377,990 $ - $ 2,377,990 $ - Description of liability Interest rate swaps $ 9,344 $ - $ 9,344 $ - Total liabilities $ 9,344 $ - $ 9,344 $ -
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 June 30, 2016 Quoted Prices in Active Markets for Identical Assets Significant Other Significant Total Losses For the Six Months Ended June 30, 2016 (Dollars in thousands) Description of assets Impaired loans, excluding PCI loans: Commercial and industrial $ 95 $ - $ - $ 95 $ 14 SBA 232 - - 232 42 Real estate: Commercial real estate 1,000 - - 1,000 1 Construction 7,651 - - 7,651 31 SFR mortgage - - - - - Dairy & livestock and agribusiness - - - - - Consumer and other loans 13 - - 13 4 Other real estate owned 1,522 - - 1,522 337 Total assets $ 10,513 $ - $ - $ 10,513 $ 429 Carrying Value at December 31, 2015 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Total Losses For the Year Ended December 31, 2015 (Dollars in thousands ) Description of assets Impaired loans, excluding PCI loans: Commercial and industrial $ 228 $ - $ - $ 228 $ 228 SBA 41 - - 41 15 Real estate: Commercial real estate - - - - - Construction 7,651 - - 7,651 13 SFR mortgage 588 - - 588 20 Dairy & livestock and agribusiness - - - - - Consumer and other loans 258 - - 258 101 Other real estate owned 948 - - 948 162 Total assets $ 9,714 $ - $ - $ 9,714 $ 539
Estimated Fair Value of Financial Instruments	The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. June 30, 2016 Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 699,182 $ 699,182 $ - $ - $ 699,182 Interest-earning balances due from depository institutions 91,272 - 91,272 - 91,272 FHLB stock 17,688 - 17,688 - 17,688 Investment securities available-for-sale 2,248,032 - 2,248,032 - 2,248,032 Investment securities held-to-maturity 724,357 - 742,006 1,475 743,481 Total loans, net of allowance for loan losses 4,176,990 - - 4,243,374 4,243,374 Swaps 15,161 - 15,161 - 15,161 Liabilities Deposits: Noninterest-bearing $ 3,666,206 3,666,206 - - $ 3,666,206 Interest-bearing 2,919,780 - 2,919,677 - 2,919,677 Borrowings 590,465 - 590,342 - 590,342 Junior subordinated debentures 25,774 - 27,383 - 27,383 Swaps 15,161 - 15,161 - 15,161 December 31, 2015 Estimated Fair Value Carrying Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets Total cash and cash equivalents $ 106,097 $ 106,097 $ - $ - $ 106,097 Interest-earning balances due from depository institutions 32,691 - 32,691 - 32,691 FHLB stock 17,588 - 17,588 - 17,588 Investment securities available-for-sale 2,368,646 - 2,368,646 - 2,368,646 Investment securities held-to-maturity 850,989 - 851,186 1,853 853,039 Total loans, net of allowance for loan losses 3,957,781 - - 3,971,329 3,971,329 Swaps 9,344 - 9,344 - 9,344 Liabilities Deposits: Noninterest-bearing $ 3,250,174 3,250,174 - - $ 3,250,174 Interest-bearing 2,667,086 - 2,666,186 - 2,666,186 Borrowings 736,704 - 736,575 - 736,575 Junior subordinated debentures 25,774 - 27,210 - 27,210 Swaps 9,344 - 9,344 - 9,344

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Schedule of Segment Reporting Information by Segment	The following tables present the operating results and other key financial measures for the individual operating segments for the periods presented. For the Three Months Ended June 30, 2016 Centers Treasury Other Eliminations Total (Dollars in thousands) Interest income, including loan fees $ 38,953 $ 17,779 $ 11,283 $ - $ 68,015 Credit for funds provided (1) 8,820 - 14,004 (22,824 ) - Total interest income 47,773 17,779 25,287 (22,824 ) 68,015 Interest expense 1,723 203 133 - 2,059 Charge for funds used (1) 1,467 15,629 5,728 (22,824 ) - Total interest expense 3,190 15,832 5,861 (22,824 ) 2,059 Net interest income 44,583 1,947 19,426 - 65,956 Recapture of provision for loan losses - - - - - Net interest income after recapture of provision for loan losses 44,583 1,947 19,426 - 65,956 Noninterest income 5,326 - 3,948 - 9,274 Noninterest expense 12,891 218 21,313 - 34,422 Debt termination expense - 16 - - 16 Segment pre-tax profit $ 37,018 $ 1,713 $ 2,061 $ - $ 40,792 Segment assets as of June 30, 2016 $ 6,967,395 $ 3,738,321 $ 943,289 $ (3,336,698 ) $ 8,312,307 (1) Credit for funds provided and charges for funds used are eliminated in the condensed consolidated presentation. For the Three Months Ended June 30, 2015 Centers Treasury Other Eliminations Total (Dollars in thousands) Interest income, including loan fees $ 35,813 $ 19,210 $ 9,492 $ - $ 64,515 Credit for funds provided (1) 8,530 - 13,024 (21,554 ) - Total interest income 44,343 19,210 22,516 (21,554 ) 64,515 Interest expense 1,628 31 98 - 1,757 Charge for funds used (1) 1,052 15,441 5,061 (21,554 ) - Total interest expense 2,680 15,472 5,159 (21,554 ) 1,757 Net interest income 41,663 3,738 17,357 - 62,758 Recapture of provision for loan losses - - (2,000 ) - (2,000 ) Net interest income after recapture of provision for loan losses 41,663 3,738 19,357 - 64,758 Noninterest income 5,319 - 3,026 - 8,345 Noninterest expense 12,259 211 19,063 - 31,533 Debt termination expense - - - - - Segment pre-tax profit $ 34,723 $ 3,527 $ 3,320 $ - $ 41,570 Segment assets as of June 30, 2015 $ 6,436,216 $ 3,624,321 $ 875,585 $ (3,238,764 ) $ 7,697,358 (1) Credit for funds provided and charges for funds used are eliminated in the condensed consolidated presentation. For the Six Months Ended June 30, 2016 Centers Treasury Other Eliminations Total (Dollars in thousands) Interest income, including loan fees $ 75,457 $ 36,536 $ 20,522 $ - $ 132,515 Credit for funds provided (1) 17,517 - 27,685 (45,202) - Total interest income 92,974 36,536 48,207 (45,202) 132,515 Interest expense 3,403 387 253 - 4,043 Charge for funds used (1) 2,754 30,978 11,470 (45,202) - Total interest expense 6,157 31,365 11,723 (45,202) 4,043 Net interest income 86,817 5,171 36,484 - 128,472 Recapture of provision for loan losses - - - - - Net interest income after recapture of provision for loan losses 86,817 5,171 36,484 - 128,472 Noninterest income 10,153 - 7,804 - 17,957 Noninterest expense 25,501 434 42,851 - 68,786 Debt termination expense - 16 - - 16 Segment pre-tax profit $ 71,469 $ 4,721 $ 1,437 $ - $ 77,627 Segment assets as of June 30, 2016 $ 6,967,395 $ 3,738,321 $ 943,289 $ (3,336,698) $ 8,312,307 (1) Credit for funds provided and charges for funds used are eliminated in the condensed consolidated presentation. For the Six Months Ended June 30, 2015 Centers Treasury Other Eliminations Total (Dollars in thousands) Interest income, including loan fees $ 71,181 $ 37,865 $ 19,649 $ - $ 128,695 Credit for funds provided (1) 16,741 - 25,665 (42,406) - Total interest income 87,922 37,865 45,314 (42,406) 128,695 Interest expense 3,291 1,462 175 - 4,928 Charge for funds used (1) 2,119 30,247 10,040 (42,406) - Total interest expense 5,410 31,709 10,215 (42,406) 4,928 Net interest income 82,512 6,156 35,099 - 123,767 Recapture of provision for loan losses - - (2,000) - (2,000) Net interest income after recapture of provision for loan losses 82,512 6,156 37,099 - 125,767 Noninterest income 10,386 - 5,970 - 16,356 Noninterest expense 24,108 424 37,603 - 62,135 Debt termination expense - 13,870 - - 13,870 Segment pre-tax profit (loss) $ 68,790 $ (8,138) $ 5,466 $ - $ 66,118 Segment assets as of June 30, 2015 $ 6,436,216 $ 3,624,321 $ 875,585 $ (3,238,764) $ 7,697,358 (1) Credit for funds provided and charges for funds used are eliminated in the condensed consolidated presentation.

Derivative Financial Instrume28

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Instruments	As of June 30, 2016 and December 31, 2015, the total notional amount of the Company’s swaps was $201.4 million, and $189.0 million, respectively. The location of the asset and liability, and their respective fair values are summarized in the tables below. June 30, 2016 Asset Derivatives Liability Derivatives Balance Sheet Fair Balance Sheet Fair (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 15,161 Other liabilities $ 15,161 Total derivatives $ 15,161 $ 15,161 December 31, 2015 Asset Derivatives Liability Derivatives Balance Sheet Fair Balance Sheet Fair (Dollars in thousands) Derivatives not designated as hedging instruments: Interest rate swaps Other assets $ 9,344 Other liabilities $ 9,344 Total derivatives $ 9,344 $ 9,344
Effect of Derivative Instruments on Consolidated Statement of Earnings	The following table summarizes the effect of derivative financial instruments on the condensed consolidated statement of earnings for the periods presented. Location of Gain Derivatives Not Designated Recognized in Income on Amount of Gain Recognized in Income on Derivative as Hedging Instruments Derivative Instruments Instruments For the Three Months Ended June 30, For the Six Months Ended June 30, 2016 2015 2016 2015 (Dollars in thousands) Interest rate swaps Other income $ 327 $ 199 $ 385 $ 199 Total $ 327 $ 199 $ 385 $ 199

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Summary of Components of Other Comprehensive Income	The tables below provide a summary of the components of other comprehensive income (“OCI”) for the periods presented. For the Three Months Ended June 30, 2016 2015 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 $ 7,579 $ 3,183 $ 4,396 $ (32,968 ) $ (13,846 ) $ (19,122 ) Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity (86 ) (36 ) (50 ) - - - Net realized loss reclassified into earnings - - - - - - Net change $ 7,493 $ 3,147 $ 4,346 $ (32,968 ) $ (13,846 ) $ (19,122 ) For the Six Months Ended June 30, 2016 2015 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 $ 35,623 $ 14,961 $ 20,662 $ (12,698 ) $ (5,332 ) $ (7,366 ) Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity (860 ) (361 ) (499 ) - - - Net realized loss reclassified into earnings - - - - - - Net change $ 34,763 $ 14,600 $ 20,163 $ (12,698 ) $ (5,332 ) $ (7,366 )

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	6 Months Ended
	Jun. 30, 2016
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 Recognized in offset in the Assets Presented Condensed Consolidated the Condensed Condensed in the Condensed Balance Sheets Consolidated Consolidated Consolidated Financial Collateral Balance Sheets Balance Sheets Balance Sheets Instruments Pledged Net Amount (Dollars in thousands) June 30, 2016 Financial assets: Derivatives not designated as hedging instruments $ 15,161 $ - $ - $ 15,161 $ - $ 15,161 Total $ 15,161 $ - $ - $ 15,161 $ - $ 15,161 Financial liabilities: Derivatives not designated as hedging instruments $ 15,161 $ - $ 15,161 $ - $ (16,791) $ (1,630) Repurchase agreements 590,465 - 590,465 - (629,189) (38,724) Total $ 605,626 $ - $ 605,626 $ - $ (645,980) $ (40,354) December 31, 2015 Financial assets: Derivatives not designated as hedging instruments $ 9,344 $ - $ - $ 9,344 $ - $ 9,344 Total $ 9,344 $ - $ - $ 9,344 $ - $ 9,344 Financial liabilities: Derivatives not designated as hedging instruments $ 9,348 $ (4) $ 9,344 $ 4 $ (16,572) $ (7,224) Repurchase agreements 690,704 - 690,704 - (721,102) (30,398) Total $ 700,052 $ (4) $ 700,048 $ 4 $ (737,674) $ (37,622)

Business - Additional Informati

Business - Additional Information (Detail) $ in Millions	Jun. 30, 2016FinancialCentersSubsidiary	Feb. 29, 2016USD ($)
Schedule Of Description Of Company [Line Items]
Number of inactive subsidiaries | Subsidiary	1
Bank operated Business Financial Centers, number	43
Bank operated Commercial Banking Centers, number	8
Bank operated trust office locations, number	3
County Commerce Bank [Member]
Schedule Of Description Of Company [Line Items]
Total assets of merger company | $		$ 253

Business Combinations - Additio

Business Combinations - Additional Information (Detail)	Feb. 29, 2016USD ($)Branch	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Mar. 01, 2016USD ($)	Dec. 31, 2015USD ($)
Business Acquisition [Line Items]
Acquisition date				Oct. 16, 2009
Goodwill		$ 88,174,000		$ 88,174,000			$ 74,244,000
Non-recurring merger related expenses		355,000	$ 0	$ 1,204,000	$ 0
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, cash	$ 20,600,000
Assets and assumed all of the liabilities, stock	21,600,000
Goodwill						$ 13,900,000
Total fair value of assets acquired	252,400,000
Cash and balances due from depository institutions	54,800,000
FHLB stock	1,500,000
Loans and lease finance receivables	168,000,000
Fixed assets	8,600,000
Core deposit intangible assets	3,900,000
Other assets	1,700,000
Total fair value of liabilities assumed	230,800,000
Deposits	224,200,000
Other liabilities	1,600,000
FHLB advances	$ 5,000,000
Non-recurring merger related expenses		$ 355,000		$ 1,200,000

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Estimated Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 2,181,478	$ 2,337,715
Gross Unrealized Holding Gain, Available-for-sale	66,555	33,776
Gross Unrealized Holding Loss, Available-for-sale	(1)	(2,845)
Fair Value, Available-for-sale	$ 2,248,032	$ 2,368,646
Total Percent, Available-for-sale	100.00%	100.00%
Amortized Cost, Held-to-maturity	$ 724,357	$ 850,989
Gross Unrealized Holding Gain, Held-to-maturity	20,094	4,796
Gross Unrealized Holding Loss, Held-to-maturity	(970)	(2,746)
Fair Value, Held-to-maturity	$ 743,481	$ 853,039
Total Percent, Held-to-maturity	100.00%	100.00%
CMO/REMIC - Residential [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 388,881	$ 380,166
Gross Unrealized Holding Gain, Available-for-sale	9,015	4,689
Gross Unrealized Holding Loss, Available-for-sale	0	(1,074)
Fair Value, Available-for-sale	$ 397,896	$ 383,781
Total Percent, Available-for-sale	17.70%	16.20%
Amortized Cost, Held-to-maturity	$ 974	$ 1,284
Gross Unrealized Holding Gain, Held-to-maturity	501	569
Gross Unrealized Holding Loss, Held-to-maturity	0	0
Fair Value, Held-to-maturity	$ 1,475	$ 1,853
Total Percent, Held-to-maturity	0.13%	0.15%
Government Agency/GSE [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 4,750	$ 5,752
Gross Unrealized Holding Gain, Available-for-sale	13	0
Gross Unrealized Holding Loss, Available-for-sale	0	(7)
Fair Value, Available-for-sale	$ 4,763	$ 5,745
Total Percent, Available-for-sale	0.21%	0.24%
Amortized Cost, Held-to-maturity	$ 209,301	$ 293,338
Gross Unrealized Holding Gain, Held-to-maturity	6,336	1,176
Gross Unrealized Holding Loss, Held-to-maturity	0	(734)
Fair Value, Held-to-maturity	$ 215,637	$ 293,780
Total Percent, Held-to-maturity	28.90%	34.47%
Residential Mortgage-backed Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 1,663,091	$ 1,788,857
Gross Unrealized Holding Gain, Available-for-sale	54,359	26,001
Gross Unrealized Holding Loss, Available-for-sale	0	(1,761)
Fair Value, Available-for-sale	$ 1,717,450	$ 1,813,097
Total Percent, Available-for-sale	76.40%	76.55%
Amortized Cost, Held-to-maturity	$ 215,762	$ 232,053
Gross Unrealized Holding Gain, Held-to-maturity	6,274	0
Gross Unrealized Holding Loss, Held-to-maturity	0	(1,293)
Fair Value, Held-to-maturity	$ 222,036	$ 230,760
Total Percent, Held-to-maturity	29.79%	27.27%
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 119,756	$ 157,940
Gross Unrealized Holding Gain, Available-for-sale	2,893	3,036
Gross Unrealized Holding Loss, Available-for-sale	(1)	(3)
Fair Value, Available-for-sale	$ 122,648	$ 160,973
Total Percent, Available-for-sale	5.46%	6.80%
Amortized Cost, Held-to-maturity	$ 298,320	$ 324,314
Gross Unrealized Holding Gain, Held-to-maturity	6,983	3,051
Gross Unrealized Holding Loss, Held-to-maturity	(970)	(719)
Fair Value, Held-to-maturity	$ 304,333	$ 326,646
Total Percent, Held-to-maturity	41.18%	38.11%
Other Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost, Available-for-sale	$ 5,000	$ 5,000
Gross Unrealized Holding Gain, Available-for-sale	275	50
Gross Unrealized Holding Loss, Available-for-sale	0	0
Fair Value, Available-for-sale	$ 5,275	$ 5,050
Total Percent, Available-for-sale	0.23%	0.21%

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Sep. 30, 2015	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Fair value of securities	$ 898,600,000
Net unrealized holding gain after tax	$ 3,900,000	$ 2,500,000
Total held-to-maturity investment securities		724,357,000	$ 850,989,000
Investment securities pledged as collateral		2,590,000,000	2,810,000,000
Investment in FHLB stock, impairment losses		$ 0
United States [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities issued by U.S. government percentage		86.00%
CMO/REMIC - Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Total held-to-maturity investment securities		$ 974,000	$ 1,284,000
Total CMO backed by whole loans issued by private-label companies (non-government sponsored)		$ 1,100,000

Investment Securities - Summa35

Investment Securities - Summary of Interest Income Earned on Investment Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net Investment Income [Line Items]
Total investment income	$ 16,761	$ 17,539	$ 34,908	$ 35,511
Investment securities available-for-sale [Member]
Net Investment Income [Line Items]
Taxable	10,827	12,784	22,207	25,707
Tax-advantaged	1,191	4,719	2,610	9,730
Investment securities held-to-maturity [Member]
Net Investment Income [Line Items]
Taxable	2,215	36	4,835	74
Tax-advantaged	$ 2,528	$ 0	$ 5,256	$ 0

Investment Securities - Summa36

Investment Securities - Summary of Continuous Unrealized Loss Position of Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	$ 0	$ 615,765
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	0	(2,844)
Fair Value, 12 Months or Longer, Available-for-sale	5,971	5,961
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale	(1)	(1)
Fair Value, Available-for-sale	5,971	621,726
Gross Unrealized Holding Losses, Available-for-sale	(1)	(2,845)
Fair Value, Less Than 12 Months, Held-to-maturity	67,573	425,374
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity	(970)	(2,746)
Fair Value, 12 Months or Longer, Held-to-maturity	0	0
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity	0	0
Fair Value, Held-to-maturity	67,573	425,374
Gross Unrealized Holding Losses, Held-to-maturity	(970)	(2,746)
CMO/REMIC - Residential [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	0	171,923
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	0	(1,074)
Fair Value, 12 Months or Longer, Available-for-sale	0	0
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale	0	0
Fair Value, Available-for-sale	0	171,923
Gross Unrealized Holding Losses, Available-for-sale	0	(1,074)
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	0	0
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity	0	0
Fair Value, Held-to-maturity	0	0
Gross Unrealized Holding Losses, Held-to-maturity	0	0
Government Agency/GSE [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	0	5,745
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	0	(7)
Fair Value, 12 Months or Longer, Available-for-sale	0	0
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale	0	0
Fair Value, Available-for-sale	0	5,745
Gross Unrealized Holding Losses, Available-for-sale	0	(7)
Fair Value, Less Than 12 Months, Held-to-maturity	0	84,495
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity	0	(734)
Fair Value, 12 Months or Longer, Held-to-maturity	0	0
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity	0	0
Fair Value, Held-to-maturity	0	84,495
Gross Unrealized Holding Losses, Held-to-maturity	0	(734)
Residential Mortgage-backed Securities [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	0	437,699
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	0	(1,761)
Fair Value, 12 Months or Longer, Available-for-sale	0	0
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale	0	0
Fair Value, Available-for-sale	0	437,699
Gross Unrealized Holding Losses, Available-for-sale	0	(1,761)
Fair Value, Less Than 12 Months, Held-to-maturity	0	230,760
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity	0	(1,293)
Fair Value, 12 Months or Longer, Held-to-maturity	0	0
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity	0	0
Fair Value, Held-to-maturity	0	230,760
Gross Unrealized Holding Losses, Held-to-maturity	0	(1,293)
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	0	398
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	0	(2)
Fair Value, 12 Months or Longer, Available-for-sale	5,971	5,961
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale	(1)	(1)
Fair Value, Available-for-sale	5,971	6,359
Gross Unrealized Holding Losses, Available-for-sale	(1)	(3)
Fair Value, Less Than 12 Months, Held-to-maturity	67,573	110,119
Gross Unrealized Holding Losses, Less Than 12 Months, Held-to-maturity	(970)	(719)
Fair Value, 12 Months or Longer, Held-to-maturity	0	0
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity	0	0
Fair Value, Held-to-maturity	67,573	110,119
Gross Unrealized Holding Losses, Held-to-maturity	(970)	(719)
Other Securities [Member]
Schedule of Investments [Line Items]
Fair Value, Less Than 12 Months, Available-for-sale	0	0
Gross Unrealized Holding Losses, Less Than 12 Months, Available-for-sale	0	0
Fair Value, 12 Months or Longer, Available-for-sale	0	0
Gross Unrealized Holding Losses, 12 Months or Longer, Available-for-sale	0	0
Fair Value, Available-for-sale	0	0
Gross Unrealized Holding Losses, Available-for-sale	0	0
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	0	0
Gross Unrealized Holding Losses, 12 Months or Longer, Held-to-maturity	0	0
Fair Value, Held-to-maturity	0	0
Gross Unrealized Holding Losses, Held-to-maturity	$ 0	$ 0

Investment Securities - Summa37

Investment Securities - Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Due in one year or less, Amortized Cost, Held-to-maturity	$ 0
Due after one year through five years, Amortized Cost, Held-to-maturity	167,856
Due after five years through ten years, Amortized Cost, Held-to-maturity	240,842
Due after ten years, Amortized Cost, Held-to-maturity	315,659
Total Held-to-maturity, Debt Maturities, Amortized Cost Basis	724,357
Due in one year or less, Fair Value, Held-to-maturity	0
Due after one year through five years, Fair Value, Held-to-maturity	171,966
Due after five years through ten years, Fair Value, Held-to-maturity	245,295
Due after ten years, Fair Value, Held-to-maturity	326,220
Total, Held-to-maturity, Fair Value	743,481
Due in one year or less, Amortized Cost, Available-for-sale	12,202
Due after one year through five years, Amortized Cost, Available-for-sale	1,795,806
Due after five years through ten years, Amortized Cost, Available-for-sale	131,286
Due after ten years, Amortized Cost, Available-for-sale	242,184
Amortized Cost, Available-for-sale	2,181,478	$ 2,337,715
Due in one year or less, Fair Value, Available-for-sale	12,343
Due after one year through five years, Fair Value, Available-for-sale	1,851,485
Due after five years through ten years, Fair Value, Available-for-sale	134,700
Due after ten years, Fair Value, Available-for-sale	249,504
Total Available-for-sale Securities, Debt Maturities, Available-for-sale, Fair Value	$ 2,248,032	$ 2,368,646

Acquired SJB Assets and FDIC 38

Acquired SJB Assets and FDIC Loss Sharing Asset - Additional Information (Detail) - USD ($)	Oct. 16, 2009	Jun. 30, 2016	Dec. 31, 2015
Business Combinations [Abstract]
Acquisition date		Oct. 16, 2009
After-tax gain included in earnings due to purchase method	$ 12,300,000
Remaining discount associated with SJB loans		$ 2,400,000
Expected cash flows		$ 1,000,000
Remaining average lives of respective pools loans		3 years
Allowance for PCI loans losses		$ 310,000	$ 0

Acquired SJB Assets and FDIC 39

Acquired SJB Assets and FDIC Loss Sharing Asset - Summary of PCI Loans and Lease Finance Receivables (Detail) - USD ($)	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Real estate:
Gross PCI loans	$ 76,022,000		$ 110,746,000
Less: Allowance for PCI loan losses	(310,000)	$ 0
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	2,580,000	7,473,000
SBA	348,000	393,000
Real estate:
Commercial real estate	70,589,000	81,786,000
Construction	0	0
SFR mortgage	186,000	193,000
Dairy & livestock and agribusiness	503,000	1,429,000
Municipal lease finance receivables	0	0
Consumer and other loans	1,816,000	2,438,000
Gross PCI loans	76,022,000	93,712,000	$ 110,746,000
Less: Purchase accounting discount	(2,430,000)	(3,872,000)
Gross PCI loans, net of discount	73,592,000	89,840,000
Less: Allowance for PCI loan losses	(310,000)	0
Net Non-PCI loans	$ 73,282,000	$ 89,840,000

Acquired SJB Assets and FDIC 40

Acquired SJB Assets and FDIC Loss Sharing Asset - Summary of Gross PCI Loans by Internal Risk Ratings by Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross PCI loans	$ 76,022		$ 110,746
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross PCI loans	76,022	$ 93,712	$ 110,746
PCI Loans [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross PCI loans	60,181	76,401
PCI Loans [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross PCI loans	10,255	11,142
PCI Loans [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross PCI loans	5,586	6,169
PCI Loans [Member] | Doubtful & Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross PCI loans	$ 0	$ 0

Loans and Lease Finance Recei41

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	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI Loans	$ 76,022			$ 110,746
Gross loans, excluding PCI loans, net of deferred loan fees	4,237,928		$ 4,016,937
Less: Allowance for loan losses	(60,938)	$ (59,336)	(59,156)	(59,554)	$ (60,709)	$ (59,825)
Total loans and lease finance receivables	4,176,990		3,957,781
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	2,580		7,473
PCI Loans	76,022		93,712	$ 110,746
SBA	348		393
Discount on PCI loans	(2,430)		(3,872)
Commercial real estate	70,589		81,786
Construction	0		0
SFR mortgage	186		193
Dairy & livestock and agribusiness	503		1,429
Municipal lease finance receivables	0		0
Consumer and other loans	1,816		2,438
Less: Allowance for loan losses	(310)	$ 0	0
Net Non-PCI loans	73,282		89,840
Loans, Excluding PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	479,133		434,099
SBA	111,762		106,867
Commercial real estate	2,884,332		2,643,184
Construction	94,009		68,563
SFR mortgage	237,488		233,754
Dairy & livestock and agribusiness	213,830		305,509
Municipal lease finance receivables	71,929		74,135
Consumer and other loans	79,725		69,278
Total gross loans, excluding PCI loans	4,172,208		3,935,389
Less: Deferred loan fees, net	(7,872)		(8,292)
Gross loans, excluding PCI loans, net of deferred loan fees	4,164,336		3,927,097
Less: Allowance for loan losses	(60,628)		(59,156)
Net Non-PCI loans	$ 4,103,708		$ 3,867,941

Loans and Lease Finance Recei42

Loans and Lease Finance Receivables and Allowance for Loan Losses - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2016USD ($)SecurityLoan	Jun. 30, 2015USD ($)SecurityLoan	Jun. 30, 2016USD ($)SecurityLoan	Jun. 30, 2015USD ($)SecurityLoan	Dec. 31, 2015USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total fixed rate loans held	$ 2,040,000,000		$ 2,040,000,000
Secure borrowings and available lines of credit from FHLB and Federal Reserve Bank	3,130,000,000		3,130,000,000		$ 2,910,000,000
Impaired, at carrying value	37,764,000	$ 67,390,000	37,764,000	$ 67,390,000	63,706,000
Loans classified as troubled debt restructured	32,300,000		32,300,000
Provision for unfunded loan commitments	0	$ 0	0	$ 500,000
Reserve for credit risk for undisbursed commitments	7,200,000		7,200,000		7,200,000
Allocation of allowance to troubled debt restructuring	$ 609,000		$ 609,000		607,000
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)	69.13%		69.13%
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of total gross loan portfolio (excluding PCI loans)	2.25%		2.25%
Nonaccrual Small Business Administration Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	$ 2,600,000		$ 2,600,000
Impaired Loans Modified in Troubled Debt Restructure [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value	32,300,000		32,300,000
Nonaccrual Single Family Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	2,400,000		2,400,000
Nonaccrual Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	11,400,000		11,400,000
Nonaccrual Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	428,000		428,000
Loans, Excluding PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate loans	2,884,332,000		2,884,332,000		2,643,184,000
Dairy & livestock and agribusiness	213,830,000		213,830,000		305,509,000
Impaired, at carrying value					63,700,000
Outstanding balance	17,472,000		17,472,000		21,019,000
Loans, Excluding PCI Loans [Member] | Nonaccrual Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	568,000		568,000
Loans, Excluding PCI Loans [Member] | Dairy & Livestock Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Dairy & livestock and agribusiness	200,200,000		200,200,000		287,000,000
Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	568,000		568,000		704,000
Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	2,637,000		2,637,000		2,567,000
Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	428,000		428,000		519,000
Loans, Excluding PCI Loans [Member] | Agribusiness Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Dairy & livestock and agribusiness	$ 14,100,000		$ 14,100,000		$ 18,500,000
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)	6.60%		6.60%		6.54%
Commercial real estate loans	$ 190,500,000		$ 190,500,000		$ 173,000,000
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	135,600,000		135,600,000		128,400,000
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	54,800,000		54,800,000		44,600,000
Nonperforming Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value	12,000,000		12,000,000
Loans classified as troubled debt restructured	12,000,000		12,000,000
Performing Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value	37,800,000		37,800,000
Loans classified as troubled debt restructured	20,300,000		$ 20,300,000
Number of performing loans | SecurityLoan			31
Performing Financing Receivable [Member] | Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	6,500,000		$ 6,500,000
Number of loans | SecurityLoan			9
Performing Financing Receivable [Member] | Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	7,700,000		$ 7,700,000
Number of loans | SecurityLoan			1
Performing Financing Receivable [Member] | Dairy & Livestock Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	697,000		$ 697,000
Number of loans | SecurityLoan			1
Performing Financing Receivable [Member] | Single-family Residential Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	3,300,000		$ 3,300,000
Number of loans | SecurityLoan			11
Performing Financing Receivable [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	879,000		$ 879,000
Number of loans | SecurityLoan			6
Performing Financing Receivable [Member] | Small Business Administration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	861,000		$ 861,000
Number of loans | SecurityLoan			2
Performing Financing Receivable [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructured	$ 401,000		$ 401,000
Number of loans | SecurityLoan			1
Number of loans removed from TDR classification | SecurityLoan	0	0	0	0
Allowance Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired, at carrying value					$ 669,000
Loans classified as troubled debt restructured	$ 630,000		$ 630,000

Loans and Lease Finance Recei43

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	Jun. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	$ 479,133	$ 434,099
SBA	111,762	106,867
Commercial real estate, Owner occupied	933,935	838,353
Commercial real estate, Non-owner occupied	1,950,397	1,804,831
Construction, Speculative	54,952	45,837
Construction, Non-speculative	39,057	22,726
SFR mortgage	237,488	233,754
Dairy & livestock and agribusiness	213,830	305,509
Municipal lease finance receivables	71,929	74,135
Consumer and other loans	79,725	69,278
Total gross loans, excluding PCI loans	4,172,208	3,935,389
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	440,455	398,651
SBA	93,259	87,441
Commercial real estate, Owner occupied	827,887	772,114
Commercial real estate, Non-owner occupied	1,909,707	1,741,615
Construction, Speculative	47,301	38,186
Construction, Non-speculative	39,057	22,726
SFR mortgage	229,984	227,207
Dairy & livestock and agribusiness	145,897	285,647
Municipal lease finance receivables	67,188	69,194
Consumer and other loans	75,378	64,844
Total gross loans, excluding PCI loans	3,876,113	3,707,625
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	21,264	33,000
SBA	11,697	13,169
Commercial real estate, Owner occupied	87,431	54,758
Commercial real estate, Non-owner occupied	24,804	26,170
Construction, Speculative	0	0
Construction, Non-speculative	0	0
SFR mortgage	4,965	3,556
Dairy & livestock and agribusiness	48,122	19,862
Municipal lease finance receivables	4,741	4,941
Consumer and other loans	1,867	1,618
Total gross loans, excluding PCI loans	204,891	157,074
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	17,407	2,403
SBA	6,582	4,854
Commercial real estate, Owner occupied	18,617	11,481
Commercial real estate, Non-owner occupied	15,886	37,046
Construction, Speculative	7,651	7,651
Construction, Non-speculative	0	0
SFR mortgage	2,539	2,991
Dairy & livestock and agribusiness	19,811	0
Municipal lease finance receivables	0	0
Consumer and other loans	2,377	2,708
Total gross loans, excluding PCI loans	90,870	69,134
Doubtful & Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	7	45
SBA	224	1,403
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	103	108
Total gross loans, excluding PCI loans	$ 334	$ 1,556

Loans and Lease Finance Recei44

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	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 59,336	$ 60,709	$ 59,156	$ 59,825
Charge-offs	(25)	(342)	(188)	(686)
Recoveries	1,627	1,187	1,970	2,415
(Recapture of) Provision for Loan Losses	0	(2,000)	0	(2,000)
Ending Balance	60,938	59,554	60,938	59,554
PCI Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	0		0
Charge-offs	0		0
Recoveries	0		0
(Recapture of) Provision for Loan Losses	310		310
Ending Balance	310		310
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	8,731	7,502	8,588	7,074
Charge-offs	(24)	0	(85)	(134)
Recoveries	141	197	204	232
(Recapture of) Provision for Loan Losses	539	(514)	680	13
Ending Balance	9,387	7,185	9,387	7,185
Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,236	2,196	993	2,557
Charge-offs	0	0	0	(33)
Recoveries	2	3	3	37
(Recapture of) Provision for Loan Losses	(61)	(114)	181	(476)
Ending Balance	1,177	2,085	1,177	2,085
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	38,286	34,848	36,995	33,373
Charge-offs	0	(107)	0	(107)
Recoveries	496	783	635	1,640
(Recapture of) Provision for Loan Losses	1,137	(110)	2,289	508
Ending Balance	39,919	35,414	39,919	35,414
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,151	1,043	2,389	988
Charge-offs	0	0	0	0
Recoveries	875	41	884	50
(Recapture of) Provision for Loan Losses	(798)	(338)	(2,045)	(292)
Ending Balance	1,228	746	1,228	746
SFR Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,202	2,425	2,103	2,344
Charge-offs	0	(215)	(102)	(215)
Recoveries	0	0	0	185
(Recapture of) Provision for Loan Losses	299	354	500	250
Ending Balance	2,501	2,564	2,501	2,564
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	5,176	3,746	6,029	5,479
Charge-offs	0	0	0	0
Recoveries	107	111	206	210
(Recapture of) Provision for Loan Losses	(401)	117	(1,353)	(1,715)
Ending Balance	4,882	3,974	4,882	3,974
Municipal Lease Finance Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,165	1,030	1,153	1,412
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
(Recapture of) Provision for Loan Losses	(50)	(16)	(38)	(398)
Ending Balance	1,115	1,014	1,115	1,014
Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,389	825	906	1,262
Charge-offs	(1)	(20)	(1)	(197)
Recoveries	6	52	38	61
(Recapture of) Provision for Loan Losses	(975)	(23)	(524)	(292)
Ending Balance	419	834	419	834
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	0	7,094	0	5,336
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
(Recapture of) Provision for Loan Losses	0	(1,356)	0	402
Ending Balance	$ 0	$ 5,738	$ 0	$ 5,738

Loans and Lease Finance Recei45

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	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	$ 37,764		$ 67,390
Recorded Investment in Loans, Collectively Evaluated for Impairment	4,134,444		3,620,291
Recorded Investment in Loans, Acquired with Deteriorated Credit Quality	76,022		110,746
Allowance for Loan Losses, Individually Evaluated for Impairment	630		550
Allowance for Loan Losses, Collectively Evaluated for Impairment	59,998		59,004
Allowance for Loan Losses, Acquired with Deteriorated Credit Quality	310		0
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	1,447		1,562
Recorded Investment in Loans, Collectively Evaluated for Impairment	477,686		404,861
Recorded Investment in Loans, Acquired with Deteriorated Credit Quality	0		0
Allowance for Loan Losses, Individually Evaluated for Impairment	526		435
Allowance for Loan Losses, Collectively Evaluated for Impairment	8,861		6,750
Allowance for Loan Losses, Acquired with Deteriorated Credit Quality	0		0
Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	3,498		3,146
Recorded Investment in Loans, Collectively Evaluated for Impairment	108,264		117,420
Recorded Investment in Loans, Acquired with Deteriorated Credit Quality	0		0
Allowance for Loan Losses, Individually Evaluated for Impairment	42		12
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,135		2,073
Allowance for Loan Losses, Acquired with Deteriorated Credit Quality	0		0
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	17,908		39,981
Recorded Investment in Loans, Collectively Evaluated for Impairment	2,866,424		2,529,430
Recorded Investment in Loans, Acquired with Deteriorated Credit Quality	0		0
Allowance for Loan Losses, Individually Evaluated for Impairment	1		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	39,918		35,414
Allowance for Loan Losses, Acquired with Deteriorated Credit Quality	0		0
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	7,651		7,651
Recorded Investment in Loans, Collectively Evaluated for Impairment	86,358		39,276
Recorded Investment in Loans, Acquired with Deteriorated Credit Quality	0		0
Allowance for Loan Losses, Individually Evaluated for Impairment	45		24
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,183		722
Allowance for Loan Losses, Acquired with Deteriorated Credit Quality	0		0
SFR Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment in Loans, Individually Evaluated for Impairment	5,734		7,044
Recorded Investment in Loans, Collectively Evaluated for Impairment	231,754		207,459
Recorded Investment in Loans, Acquired with Deteriorated Credit Quality	0		0
Allowance for Loan Losses, Individually Evaluated for Impairment	13		77
Allowance for Loan Losses, Collectively Evaluated for Impairment	2,488		2,487
Allowance for Loan Losses, Acquired with Deteriorated 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	697		7,091
Recorded Investment in Loans, Collectively Evaluated for Impairment	213,133		176,893
Recorded Investment in Loans, Acquired with Deteriorated Credit Quality	0		0
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	4,882		3,974
Allowance for Loan Losses, Acquired with Deteriorated 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	71,929		74,691
Recorded Investment in Loans, Acquired with Deteriorated Credit Quality	0		0
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,115		1,014
Allowance for Loan Losses, Acquired with Deteriorated 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	829		915
Recorded Investment in Loans, Collectively Evaluated for Impairment	78,896		70,261
Recorded Investment in Loans, Acquired with Deteriorated Credit Quality	0		0
Allowance for Loan Losses, Individually Evaluated for Impairment	3		2
Allowance for Loan Losses, Collectively Evaluated for Impairment	416		832
Allowance for Loan Losses, Acquired with Deteriorated Credit Quality	0		0
Unallocated [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 Deteriorated Credit Quality	0		0
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	0		5,738
Allowance for Loan Losses, Acquired with Deteriorated Credit Quality	0		0
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 Deteriorated Credit Quality	76,022	$ 93,712	110,746
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 Deteriorated Credit Quality	$ 310		$ 0

Loans and Lease Finance Recei46

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 ($)	Jun. 30, 2016	Dec. 31, 2015
30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 84,000	$ 456,000
60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	338,000	9,100,000
Loans, Excluding PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	478,000	1,436,000
Nonaccrual	17,472,000	21,019,000
Current	4,154,258,000	3,912,934,000
Total gross loans, excluding PCI loans	4,172,208,000	3,935,389,000
Loans, Excluding PCI Loans [Member] | 30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	478,000	1,436,000
Loans, Excluding PCI Loans [Member] | 60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	61,000	0
Nonaccrual	568,000	704,000
Current	478,504,000	433,395,000
Total gross loans, excluding PCI loans	479,133,000	434,099,000
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	61,000	0
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	0	0
Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due and Accruing	0	0
Nonaccrual	2,637,000	2,567,000
Current	109,125,000	104,300,000
Total gross loans, excluding PCI loans	111,762,000	106,867,000
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	0	0
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	0	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	0	0
Nonaccrual	1,759,000	4,174,000
Current	932,176,000	834,179,000
Total gross loans, excluding PCI loans	933,935,000	838,353,000
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	0	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	0	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	320,000	354,000
Nonaccrual	9,637,000	10,367,000
Current	1,940,440,000	1,794,110,000
Total gross loans, excluding PCI loans	1,950,397,000	1,804,831,000
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	320,000	354,000
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	54,952,000	45,837,000
Total gross loans, excluding PCI loans	54,952,000	45,837,000
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	39,057,000	22,726,000
Total gross loans, excluding PCI loans	39,057,000	22,726,000
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	0	1,082,000
Nonaccrual	2,443,000	2,688,000
Current	235,045,000	229,984,000
Total gross loans, excluding PCI loans	237,488,000	233,754,000
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	1,082,000
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	0	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	0	0
Current	213,830,000	305,509,000
Total gross loans, excluding PCI loans	213,830,000	305,509,000
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	71,929,000	74,135,000
Total gross loans, excluding PCI loans	71,929,000	74,135,000
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	97,000	0
Nonaccrual	428,000	519,000
Current	79,200,000	68,759,000
Total gross loans, excluding PCI loans	79,725,000	69,278,000
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	97,000	0
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 Recei47

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 ($)	Jun. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing loans, current	$ 15,600,000	$ 7,900,000
30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	84,000	456,000
60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	338,000	9,100,000
90+ Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 1,400,000	$ 3,500,000

Loans and Lease Finance Recei48

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	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, Total impaired loans	$ 37,764	$ 67,390	$ 63,706
Unpaid Principal Balance, Total impaired loans	44,689	77,899	71,062
Related Allowance, Total impaired loans	630	550	669
Average Recorded Investment, Total impaired loans	37,988	68,110
Interest Income Recognized, Total impaired loans	530	1,427
Recorded Investment, With no related allowance recorded	27,991	58,390	54,757
Unpaid Principal Balance, With no related allowance recorded	34,837	68,815	61,984
Related Allowance, With no related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	28,779	59,082
Interest Income Recognized, With no related allowance recorded	294	1,231
Recorded Investment, With a related allowance recorded	9,773	9,000	8,949
Unpaid Principal Balance, With a related allowance recorded	9,852	9,084	9,078
Related Allowance, With a related allowance recorded	630	550	669
Average Recorded Investment, With a related allowance recorded	9,209	9,028
Interest Income Recognized, With a related allowance recorded	236	196
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	840	1,097	1,017
Unpaid Principal Balance, With no related allowance recorded	1,727	1,941	1,894
Related Allowance, With no related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	904	1,172
Interest Income Recognized, With no related allowance recorded	14	15
Recorded Investment, With a related allowance recorded	607	465	626
Unpaid Principal Balance, With a related allowance recorded	668	536	695
Related Allowance, With a related allowance recorded	526	435	626
Average Recorded Investment, With a related allowance recorded	638	478
Interest Income Recognized, With a related allowance recorded	6	1
Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	3,266	3,087	3,207
Unpaid Principal Balance, With no related allowance recorded	4,026	3,688	3,877
Related Allowance, With no related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	3,347	3,167
Interest Income Recognized, With no related allowance recorded	25	26
Recorded Investment, With a related allowance recorded	232	59	41
Unpaid Principal Balance, With a related allowance recorded	250	59	47
Related Allowance, With a related allowance recorded	42	12	10
Average Recorded Investment, With a related allowance recorded	238	63
Interest Income Recognized, With a related allowance recorded	6	0
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	4,386	5,987	6,252
Unpaid Principal Balance, With no related allowance recorded	5,573	7,080	7,445
Related Allowance, With no related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	4,623	5,865
Interest Income Recognized, With no related allowance recorded	87	127
Recorded Investment, With a related allowance recorded	1,000	0	0
Unpaid Principal Balance, With a related allowance recorded	1,000	0	0
Related Allowance, With a related allowance recorded	1	0	0
Average Recorded Investment, With a related allowance recorded	392	0
Interest Income Recognized, With a related allowance recorded	28	0
Commercial Real Estate Non-owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	12,522	33,994	34,041
Unpaid Principal Balance, With no related allowance recorded	15,110	39,946	37,177
Related Allowance, With no related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	12,760	34,567
Interest Income Recognized, With no related allowance recorded	83	838
Recorded Investment, With a related allowance recorded	0	0	0
Unpaid Principal Balance, With a related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	0	0	0
Average Recorded Investment, With a related allowance recorded	0	0
Interest Income Recognized, With a related allowance recorded	0	0
Construction Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	0	0	0
Unpaid Principal Balance, With no related allowance recorded	0	0	0
Related Allowance, With no related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	0	0
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With a related allowance recorded	7,651	7,651	7,651
Unpaid Principal Balance, With a related allowance recorded	7,651	7,651	7,651
Related Allowance, With a related allowance recorded	45	24	13
Average Recorded Investment, With a related allowance recorded	7,651	7,651
Interest Income Recognized, With a related allowance recorded	193	192
Construction Non-speculative [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	0	0	0
Unpaid Principal Balance, With no related allowance recorded	0	0	0
Related Allowance, With no related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	0	0
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With a related allowance recorded	0	0	0
Unpaid Principal Balance, With a related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	0	0	0
Average Recorded Investment, With a related allowance recorded	0	0
Interest Income Recognized, With a related allowance recorded	0	0
SFR Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	5,464	6,228	5,665
Unpaid Principal Balance, With no related allowance recorded	6,331	7,175	6,453
Related Allowance, With no related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	5,591	6,102
Interest Income Recognized, With no related allowance recorded	60	50
Recorded Investment, With a related allowance recorded	270	816	588
Unpaid Principal Balance, With a related allowance recorded	270	824	640
Related Allowance, With a related allowance recorded	13	77	20
Average Recorded Investment, With a related allowance recorded	277	826
Interest Income Recognized, With a related allowance recorded	3	3
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	697	7,091	3,685
Unpaid Principal Balance, With no related allowance recorded	697	7,559	3,684
Related Allowance, With no related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	709	7,269
Interest Income Recognized, With no related allowance recorded	17	167
Recorded Investment, With a related allowance recorded	0	0	0
Unpaid Principal Balance, With a related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	0	0	0
Average Recorded Investment, With a related allowance recorded	0	0
Interest Income Recognized, With a related allowance recorded	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
Unpaid Principal Balance, With no related allowance recorded	0	0	0
Related Allowance, With no related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	0	0
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With a related allowance recorded	0	0	0
Unpaid Principal Balance, With a related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	0	0	0
Average Recorded Investment, With a related allowance recorded	0	0
Interest Income Recognized, With a related allowance recorded	0	0
Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded Investment, With no related allowance recorded	816	906	890
Unpaid Principal Balance, With no related allowance recorded	1,373	1,426	1,454
Related Allowance, With no related allowance recorded	0	0	0
Average Recorded Investment, With no related allowance recorded	845	940
Interest Income Recognized, With no related allowance recorded	8	8
Recorded Investment, With a related allowance recorded	13	9	43
Unpaid Principal Balance, With a related allowance recorded	13	14	45
Related Allowance, With a related allowance recorded	3	2	$ 0
Average Recorded Investment, With a related allowance recorded	13	10
Interest Income Recognized, With a related allowance recorded	$ 0	$ 0

Loans and Lease Finance Recei49

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 (Parenthetical) (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Receivables [Abstract]
Recorded Investment, With no related allowance recorded	$ 27,991	$ 58,390	$ 54,757
Recorded Investment, With a related allowance recorded	9,773	9,000	8,949
Recorded Investment, Total impaired loans	37,764	67,390	63,706
Unpaid Principal Balance, With no related allowance recorded	34,837	68,815	61,984
Unpaid Principal Balance, With a related allowance recorded	9,852	9,084	9,078
Unpaid Principal Balance, Total impaired loans	44,689	77,899	71,062
Related Allowance, With no related allowance recorded	0	0	0
Related Allowance, With a related allowance recorded	630	550	669
Related Allowance, Total impaired loans	630	550	$ 669
Average Recorded Investment, With no related allowance recorded	28,779	59,082
Average Recorded Investment, With a related allowance recorded	9,209	9,028
Average Recorded Investment, Total impaired loans	37,988	68,110
Interest Income Recognized, With no related allowance recorded	294	1,231
Interest Income Recognized, With a related allowance recorded	236	196
Interest Income Recognized, Total impaired loans	$ 530	$ 1,427

Loans and Lease Finance Recei50

Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Activity Related to Troubled Debt Restructurings (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 32,321	$ 60,333	$ 32,321	$ 60,333
Performing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	37,321	45,376	42,687	53,589
New modifications	112	30	1,118	30
Payoffs and payments, net	(17,141)	(240)	(23,513)	(8,969)
TDRs returned to accrual status	0	0	0	516
TDRs placed on nonaccrual status	0	0	0	0
Ending balance	20,292	45,166	20,292	45,166
Nonperforming TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	12,360	16,774	12,622	20,285
New modifications	0	330	82	330
Charge-offs	0	0	(38)	0
Transfer to OREO	0	0	0	(842)
Payoffs and payments, net	(331)	(842)	(637)	(4,090)
TDRs returned to accrual status	0	(1,095)	0	(516)
TDRs placed on nonaccrual status	0	0	0	0
Ending balance	$ 12,029	$ 15,167	$ 12,029	$ 15,167

Loans and Lease Finance Recei51

Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Loans Modified as Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016USD ($)Contract	Jun. 30, 2015USD ($)Contract	Jun. 30, 2016USD ($)Contract	Jun. 30, 2015USD ($)Contract
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	1	2	6	2
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 112	$ 360	$ 1,200	$ 360
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	112	360	1,200	360
Troubled debt restructurings, Outstanding Recorded Investment	1,133	360	1,133	360
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 12	$ 28	$ 12
Commercial and Industrial [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	0	0	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 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	1	1	1
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 112	$ 30	$ 112	$ 30
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	112	30	112	30
Troubled debt restructurings, Outstanding Recorded Investment	110	30	110	30
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0	$ 0
Small Business Administration [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	0	0	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0	$ 0
Small Business Administration [Member] | Change in Amortization Period or Maturity [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	1	1	1
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 330	$ 194	$ 330
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	330	194	330
Troubled debt restructurings, Outstanding Recorded Investment	190	330	190	330
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 12	$ 28	$ 12
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	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 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	0	2	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 812	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	812	0
Troubled debt restructurings, Outstanding Recorded Investment	761	0	761	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 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	0	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 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	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0	$ 0
Consumer [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	0	0	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Outstanding Recorded Investment	0	0	0	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0	$ 0
Consumer [Member] | Change in Amortization Period or Maturity [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Number of Loans | Contract	0	0	2	0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 82	$ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment	0	0	82	0
Troubled debt restructurings, Outstanding Recorded Investment	72	0	72	0
Troubled debt restructurings, Financial Effect Resulting From Modifications	$ 0	$ 0	$ 0	$ 0

Earnings Per Share Reconcilia52

Earnings Per Share Reconciliation - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per common share	262,000	254,000	267,000	228,000

Earnings Per Share Reconcilia53

Earnings Per Share Reconciliation - Schedule of Earnings Per Common Share Reconciliation (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings per common share:
Net earnings	$ 25,514	$ 26,813	$ 48,905	$ 42,646
Less: Net earnings allocated to restricted stock	99	143	205	223
Net earnings allocated to common shareholders	$ 25,415	$ 26,670	$ 48,700	$ 42,423
Weighted average shares outstanding	108,834	105,707	106,917	105,616
Basic earnings per common share	$ 0.23	$ 0.25	$ 0.46	$ 0.40
Diluted earnings per common share:
Net income allocated to common shareholders	$ 25,415	$ 26,670	$ 48,700	$ 42,423
Weighted average shares outstanding	108,834	105,707	106,917	105,616
Incremental shares from assumed exercise of outstanding options	410	451	406	445
Diluted weighted average shares outstanding	109,244	106,158	107,323	106,061
Diluted earnings per common share	$ 0.23	$ 0.25	$ 0.45	$ 0.40

Fair Value Information - Additi

Fair Value Information - Additional Information (Detail) - USD ($)	Jun. 30, 2016	Jun. 30, 2015
Fair Value Disclosures [Abstract]
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

Fair Value Information - Assets

Fair Value Information - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, liabilities	$ 605,626	$ 700,048
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	15,161	9,344
Interest rate swaps, liabilities	15,161	9,344
Fair Value on Recurring Basis [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0	0
Total liabilities	0	0
Fair Value on Recurring Basis [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	2,263,193	2,377,990
Total liabilities	15,161	9,344
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	122,648	160,973
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] | Government Agency/GSE [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] | Government Agency/GSE [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	4,763	5,745
Fair Value on Recurring Basis [Member] | Government Agency/GSE [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	1,717,450	1,813,097
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	397,896	383,781
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	5,275	5,050
Fair Value on Recurring Basis [Member] | Other Securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | Investment Securities - AFS [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	0	0
Fair Value on Recurring Basis [Member] | Investment Securities - AFS [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	2,248,032	2,368,646
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	15,161	9,344
Interest rate swaps, liabilities	15,161	9,344
Fair Value on Recurring Basis [Member] | Interest Rate Swaps [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, assets	0	0
Interest rate swaps, liabilities	0	0
Fair Value on Recurring Basis [Member] | Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	2,263,193	2,377,990
Total liabilities	15,161	9,344
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	122,648	160,973
Fair Value on Recurring Basis [Member] | Carrying Value [Member] | Government Agency/GSE [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	4,763	5,745
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	1,717,450	1,813,097
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	397,896	383,781
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	5,275	5,050
Fair Value on Recurring Basis [Member] | Carrying Value [Member] | Investment Securities - AFS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - AFS	2,248,032	2,368,646
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	15,161	9,344
Interest rate swaps, liabilities	$ 15,161	$ 9,344

Fair Value Information - Asse56

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	Jun. 30, 2016	Dec. 31, 2015
Description of assets
Total assets	$ 429	$ 539
Other Real Estate Owned [Member]
Description of assets
Total assets	337	162
Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	14	228
Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	42	15
Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	1	0
Loans, Excluding PCI Loans [Member] | Construction [Member]
Description of assets
Total assets	31	13
Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member]
Description of assets
Total assets	0	20
Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	0	0
Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	4	101
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] | 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] | 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	10,513	9,714
Level 3 [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	1,522	948
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	95	228
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	232	41
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	1,000	0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Construction [Member]
Description of assets
Total assets	7,651	7,651
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member]
Description of assets
Total assets	0	588
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	0	0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	13	258
Carrying Value [Member]
Description of assets
Total assets	10,513	9,714
Carrying Value [Member] | Other Real Estate Owned [Member]
Description of assets
Total assets	1,522	948
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Description of assets
Total assets	95	228
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Small Business Administration [Member]
Description of assets
Total assets	232	41
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member]
Description of assets
Total assets	1,000	0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Construction [Member]
Description of assets
Total assets	7,651	7,651
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member]
Description of assets
Total assets	0	588
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member]
Description of assets
Total assets	0	0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member]
Description of assets
Total assets	$ 13	$ 258

Fair Value Information - Estima

Fair Value Information - Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Assets
Total cash and cash equivalents	$ 699,182	$ 106,097	$ 446,446	$ 105,768
Interest-earning balances due from depository institutions	91,272	32,691
FHLB stock	17,688	17,588
Investment securities available-for-sale	2,248,032	2,368,646
Investment securities held-to-maturity	724,357	850,989
Total loans, net of allowance for loan losses	4,176,990	3,957,781
Deposits:
Noninterest-bearing	3,666,206	3,250,174
Interest-bearing	2,919,780	2,667,086
Junior subordinated debentures	25,774	25,774
Swaps	605,626	700,048
Carrying Value [Member]
Assets
Total cash and cash equivalents	699,182	106,097
Interest-earning balances due from depository institutions	91,272	32,691
FHLB stock	17,688	17,588
Investment securities available-for-sale	2,248,032	2,368,646
Investment securities held-to-maturity	724,357	850,989
Total loans, net of allowance for loan losses	4,176,990	3,957,781
Swaps	15,161	9,344
Deposits:
Noninterest-bearing	3,666,206	3,250,174
Interest-bearing	2,919,780	2,667,086
Borrowings	590,465	736,704
Junior subordinated debentures	25,774	25,774
Swaps	15,161	9,344
Estimated Fair Value [Member]
Assets
Total cash and cash equivalents	699,182	106,097
Interest-earning balances due from depository institutions	91,272	32,691
FHLB stock	17,688	17,588
Investment securities available-for-sale	2,248,032	2,368,646
Investment securities held-to-maturity	743,481	853,039
Total loans, net of allowance for loan losses	4,243,374	3,971,329
Swaps	15,161	9,344
Deposits:
Noninterest-bearing	3,666,206	3,250,174
Interest-bearing	2,919,677	2,666,186
Borrowings	590,342	736,575
Junior subordinated debentures	27,383	27,210
Swaps	15,161	9,344
Estimated Fair Value [Member] | Level 1 [Member]
Assets
Total cash and cash equivalents	699,182	106,097
Interest-earning balances due from depository institutions	0	0
FHLB stock	0	0
Investment securities available-for-sale	0	0
Investment securities held-to-maturity	0	0
Total loans, net of allowance for loan losses	0	0
Swaps	0	0
Deposits:
Noninterest-bearing	3,666,206	3,250,174
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	91,272	32,691
FHLB stock	17,688	17,588
Investment securities available-for-sale	2,248,032	2,368,646
Investment securities held-to-maturity	742,006	851,186
Total loans, net of allowance for loan losses	0	0
Swaps	15,161	9,344
Deposits:
Noninterest-bearing	0	0
Interest-bearing	2,919,677	2,666,186
Borrowings	590,342	736,575
Junior subordinated debentures	27,383	27,210
Swaps	15,161	9,344
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	0
Investment securities available-for-sale	0	0
Investment securities held-to-maturity	1,475	1,853
Total loans, net of allowance for loan losses	4,243,374	3,971,329
Swaps	0	0
Deposits:
Noninterest-bearing	0	0
Interest-bearing	0	0
Borrowings	0	0
Junior subordinated debentures	0	0
Swaps	$ 0	$ 0

Business Segments - Additional

Business Segments - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2016FinancialCentersSegment
Segment Reporting [Abstract]
Number of principal reporting segments | Segment	2
Bank operated Business Financial Centers, number | FinancialCenters	43
Bank operated Commercial Banking Centers, number | FinancialCenters	8
Consideration of Business Financial and Commercial Banking Centers | Segment	1

Business Segments - Schedule of

Business Segments - Schedule of Segment Reporting Information by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Interest income, including loan fees	$ 68,015	$ 64,515	$ 132,515	$ 128,695
Credit for funds provided	0	0	0	0
Total interest income	68,015	64,515	132,515	128,695
Interest expense	2,059	1,757	4,043	4,928
Charge for funds used	0	0	0	0
Total interest expense	2,059	1,757	4,043	4,928
Net interest income	65,956	62,758	128,472	123,767
Recapture of provision for loan losses	0	(2,000)	0	(2,000)
Net interest income after recapture of provision for loan losses	65,956	64,758	128,472	125,767
Noninterest income	9,274	8,345	17,957	16,356
Noninterest expense	34,422	31,533	68,786	62,135
Debt termination expense	16	0	16	13,870
Earnings before income taxes	40,792	41,570	77,627	66,118
Segment assets	8,312,307	7,697,358	8,312,307	7,697,358	$ 7,671,200
Operating Segments [Member] | Centers [Member]
Segment Reporting Information [Line Items]
Interest income, including loan fees	38,953	35,813	75,457	71,181
Credit for funds provided	8,820	8,530	17,517	16,741
Total interest income	47,773	44,343	92,974	87,922
Interest expense	1,723	1,628	3,403	3,291
Charge for funds used	1,467	1,052	2,754	2,119
Total interest expense	3,190	2,680	6,157	5,410
Net interest income	44,583	41,663	86,817	82,512
Recapture of provision for loan losses	0	0	0	0
Net interest income after recapture of provision for loan losses	44,583	41,663	86,817	82,512
Noninterest income	5,326	5,319	10,153	10,386
Noninterest expense	12,891	12,259	25,501	24,108
Debt termination expense	0	0	0	0
Earnings before income taxes	37,018	34,723	71,469	68,790
Segment assets	6,967,395	6,436,216	6,967,395	6,436,216
Operating Segments [Member] | Treasury [Member]
Segment Reporting Information [Line Items]
Interest income, including loan fees	17,779	19,210	36,536	37,865
Credit for funds provided	0	0	0	0
Total interest income	17,779	19,210	36,536	37,865
Interest expense	203	31	387	1,462
Charge for funds used	15,629	15,441	30,978	30,247
Total interest expense	15,832	15,472	31,365	31,709
Net interest income	1,947	3,738	5,171	6,156
Recapture of provision for loan losses	0	0	0	0
Net interest income after recapture of provision for loan losses	1,947	3,738	5,171	6,156
Noninterest income	0	0	0	0
Noninterest expense	218	211	434	424
Debt termination expense	16	0	16	13,870
Earnings before income taxes	1,713	3,527	4,721	(8,138)
Segment assets	3,738,321	3,624,321	3,738,321	3,624,321
Operating Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Interest income, including loan fees	11,283	9,492	20,522	19,649
Credit for funds provided	14,004	13,024	27,685	25,665
Total interest income	25,287	22,516	48,207	45,314
Interest expense	133	98	253	175
Charge for funds used	5,728	5,061	11,470	10,040
Total interest expense	5,861	5,159	11,723	10,215
Net interest income	19,426	17,357	36,484	35,099
Recapture of provision for loan losses	0	(2,000)	0	(2,000)
Net interest income after recapture of provision for loan losses	19,426	19,357	36,484	37,099
Noninterest income	3,948	3,026	7,804	5,970
Noninterest expense	21,313	19,063	42,851	37,603
Debt termination expense	0	0	0	0
Earnings before income taxes	2,061	3,320	1,437	5,466
Segment assets	943,289	875,585	943,289	875,585
Eliminations [Member]
Segment Reporting Information [Line Items]
Interest income, including loan fees	0	0	0	0
Credit for funds provided	(22,824)	(21,554)	(45,202)	(42,406)
Total interest income	(22,824)	(21,554)	(45,202)	(42,406)
Interest expense	0	0	0	0
Charge for funds used	(22,824)	(21,554)	(45,202)	(42,406)
Total interest expense	(22,824)	(21,554)	(45,202)	(42,406)
Net interest income	0	0	0	0
Recapture of provision for loan losses	0	0	0	0
Net interest income after recapture of provision for loan losses	0	0	0	0
Noninterest income	0	0	0	0
Noninterest expense	0	0	0	0
Debt termination expense	0	0	0	0
Earnings before income taxes	0	0	0	0
Segment assets	$ (3,336,698)	$ (3,238,764)	$ (3,336,698)	$ (3,238,764)

Derivative Financial Instrume60

Derivative Financial Instruments - Additional Information (Detail)	Jun. 30, 2016USD ($)Agreement	Dec. 31, 2015USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets and liabilities offset in balance sheet	$ 0
Total notional amount of the Company's swaps	$ 201,400,000	$ 189,000,000
Interest-rate Swap Agreements with Customers [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest-rate swap agreements | Agreement	80

Derivative Financial Instrume61

Derivative Financial Instruments - Fair Value of Derivative Instruments (Detail) - Derivatives Not Designated as Hedging Instruments [Member] - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 15,161	$ 9,344
Other Liabilities [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	15,161	9,344
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	15,161	9,344
Other Assets [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 15,161	$ 9,344

Derivative Financial Instrume62

Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statement of Earnings (Detail) - Derivatives Not Designated as Hedging Instruments [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Derivatives, Fair Value [Line Items]
Amount of Gain Recognized in Income on Derivative Instruments	$ 327	$ 199	$ 385	$ 199
Interest Rate Swaps [Member] | Other Income [Member]
Derivatives, Fair Value [Line Items]
Amount of Gain Recognized in Income on Derivative Instruments	$ 327	$ 199	$ 385	$ 199

Other Comprehensive Income - Su

Other Comprehensive Income - Summary of Components of Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Equity [Abstract]
Net change in fair value recorded in accumulated OCI, Before-tax	$ 7,579	$ (32,968)	$ 35,623	$ (12,698)
Net change in fair value recorded in accumulated OCI, Tax effect	3,183	(13,846)	14,961	(5,332)
Net change in fair value recorded in accumulated OCI, After-tax	4,396	(19,122)	20,662	(7,366)
Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity, Before-tax	(86)	0	(860)	0
Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity, Tax effect	(36)	0	(361)	0
Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity, After-tax	(50)	0	(499)	0
Net realized loss reclassified into earnings, Before-Tax	0	0	0	0
Net realized loss reclassified into earnings, Tax Effect	0	0	0	0
Net realized loss reclassified into earnings, After-Tax	0	0	0	0
Net change, Before-tax	7,493	(32,968)	34,763	(12,698)
Net change, Tax effect	3,147	(13,846)	14,600	(5,332)
Net change, After-tax	$ 4,346	$ (19,122)	$ 20,163	$ (7,366)

Balance Sheet Offsetting - Sche

Balance Sheet Offsetting - Schedule of Balance Sheet Offsetting (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Offsetting Assets Liabilities [Line Items]
Financial liabilities, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	$ 605,626	$ 700,052
Financial liabilities, Gross Amounts offset in the Condensed Consolidated Balance Sheets	0	(4)
Financial liabilities, Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	605,626	700,048
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	0	4
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(645,980)	(737,674)
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	(40,354)	(37,622)
Repurchase Agreements [Member]
Offsetting Assets Liabilities [Line Items]
Financial liabilities, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	590,465	690,704
Financial liabilities, Gross Amounts offset in the Condensed Consolidated Balance Sheets	0	0
Financial liabilities, Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	590,465	690,704
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	0	0
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(629,189)	(721,102)
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	(38,724)	(30,398)
Interest Rate Swaps [Member]
Offsetting Assets Liabilities [Line Items]
Financial assets, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	15,161	9,344
Financial assets, Gross Amounts offset in the Condensed Consolidated Balance Sheets	0	0
Financial assets, Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	0	0
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	15,161	9,344
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	0	0
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	15,161	9,344
Interest Rate Swaps [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Offsetting Assets Liabilities [Line Items]
Financial assets, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	15,161	9,344
Financial assets, Gross Amounts offset in the Condensed Consolidated Balance Sheets	0	0
Financial assets, Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	0	0
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	15,161	9,344
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	0	0
Financial assets, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	15,161	9,344
Financial liabilities, Gross Amounts Recognized in the Condensed Consolidated Balance Sheets	15,161	9,348
Financial liabilities, Gross Amounts offset in the Condensed Consolidated Balance Sheets	0	(4)
Financial liabilities, Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	15,161	9,344
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	0	4
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(16,791)	(16,572)
Financial liabilities, Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	$ (1,630)	$ (7,224)