Capital Bank Financial (CBF) Inactive 10-Q1 May 172017 Q1 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2017	Apr. 21, 2017
Document Information [Line Items]
Entity Registrant Name	Capital Bank Financial Corp.
Entity Central Index Key	1,479,750
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Amendment Flag	false
Common Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		35,213,068
Common Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		16,753,429

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 100,134	$ 107,707
Interest-bearing deposits in other banks	60,413	201,348
Total cash and cash equivalents	160,547	309,055
Trading securities	4,150	3,791
Investment securities available-for-sale at fair value (amortized cost $1,168,995 and $927,266, respectively)	1,154,496	912,250
Investment securities held-to-maturity at amortized cost (fair value $445,696 and $460,911, respectively)	446,020	463,959
Loans held for sale	4,980	12,874
Loans, net of deferred loan costs and fees	7,506,975	7,393,318
Less: Allowance for loan and lease losses	43,891	43,065
Loans, net	7,463,084	7,350,253
Other real estate owned	51,050	53,482
Premises and equipment, net	199,167	205,425
Goodwill	234,158	235,500
Intangible assets, net	31,553	33,370
Deferred income tax asset, net	146,724	150,272
Bank owned life insurance	100,251	99,702
Other assets	101,862	100,724
Total Assets	10,098,042	9,930,657
Deposits:
Non-interest bearing demand	1,680,243	1,590,164
Interest bearing demand	1,960,187	1,930,143
Money market	1,821,474	1,725,838
Savings	496,230	497,171
Time deposits	2,134,473	2,137,312
Total deposits	8,092,607	7,880,628
Federal Home Loan Bank advances	490,650	545,701
Short-term borrowings	21,125	19,157
Long-term borrowings	117,272	116,456
Accrued expenses and other liabilities	68,457	76,668
Total liabilities	8,790,111	8,638,610
Commitments and contingencies
Shareholders’ equity
Preferred stock $0.01 par value: 50,000 shares authorized, 0 shares issued	0	0
Additional paid in capital	1,369,689	1,368,459
Retained earnings	262,443	247,758
Accumulated other comprehensive loss	(12,467)	(12,434)
Treasury stock, at cost, 13,040 and 13,040 shares, respectively	(312,384)	(312,384)
Total shareholders’ equity	1,307,931	1,292,047
Total Liabilities and Shareholders’ Equity	10,098,042	9,930,657
Common Class A
Shareholders’ equity
Common stock	465	462
Common Class B
Shareholders’ equity
Common stock	$ 185	$ 186

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Amortized cost of investment securities available-for-sale	$ 1,168,995	$ 927,266
Fair value of investment securities held-to-maturity	$ 445,696	$ 460,911
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Treasury stock, shares (in shares)	13,040,000	13,040,000
Common Class A
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	46,479,000	46,178,000
Common stock, shares outstanding (in shares)	35,212,000	34,911,000
Common Class B
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	18,527,000	18,627,000
Common stock, shares outstanding (in shares)	16,754,000	16,854,000

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest and dividend income
Loans, including fees	$ 83,254	$ 62,653
Investment securities:
Taxable interest income	9,065	6,287
Tax-exempt interest income	153	120
Dividends	11	13
Interest-bearing deposits in other banks	97	84
Other earning assets	357	315
Total interest and dividend income	92,937	69,472
Interest expense
Deposits	7,653	6,062
Long-term borrowings	2,281	1,511
Federal Home Loan Bank advances	864	518
Other borrowings	23	14
Total interest expense	10,821	8,105
Net Interest Income	82,116	61,367
Provision for loan and lease losses	3,392	1,375
Net interest income after provision for loan and lease losses	78,724	59,992
Non-Interest Income
Service charges on deposit accounts	5,375	4,811
Debit card income	4,765	3,086
Fees on mortgage loans originated and sold	1,248	971
Investment advisory and trust fees	641	497
Termination of loss share agreements	0	(9,178)
Investment securities gains, net	67	40
Other income	3,756	2,339
Total non-interest income	15,852	2,566
Non-Interest Expense
Salaries and employee benefits	29,166	22,162
Stock-based compensation expense	900	317
Net occupancy and equipment expense	8,992	7,703
Computer services	3,873	3,575
Software expense	2,662	2,036
Telecommunication expense	2,424	1,532
OREO valuation expense	247	467
Net gains on sales of OREO	(308)	(679)
Foreclosed asset related expense	364	285
Loan workout expense	201	244
Conversion and merger related expense	3,037	1,687
Professional fees	2,096	1,612
Regulatory assessments	719	1,275
Restructuring charges, net	1,912	142
Other expense	6,418	4,580
Total non-interest expense	62,703	46,938
Income before income taxes	31,873	15,620
Income tax expense	10,990	5,780
Net income	$ 20,883	$ 9,840
Earnings per share:
Basic (in dollars per share)	$ 0.40	$ 0.23
Diluted (in dollars per share)	$ 0.39	$ 0.22
Weighted average shares outstanding:
Basic (in shares)	51,634	43,063
Diluted (in shares)	53,127	43,904

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net Income	$ 20,883	$ 9,840
Other comprehensive income (loss) before tax:
Unrealized holding gains on investment securities available-for-sale	516	9,419
Reclassification adjustment for losses amortized in net income on securities held-to-maturity	315	337
Unrealized holding gains (losses) on cash flow hedges	(451)	5,526
Reclassification adjustments for net gains included in net income on cash flow hedges	(432)	(644)
Other comprehensive income (loss), before tax:	(52)	14,638
Tax effect	19	(5,564)
Other comprehensive income (loss), net of tax:	(33)	9,074
Comprehensive income	$ 20,850	$ 18,914

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Class A	Common Class B	Common StockCommon Class A	Common StockCommon Class B	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2015				26,589	16,554
Beginning balance at Dec. 31, 2015	$ 986,265			$ 370	$ 183	$ 1,076,415	$ 208,742	$ (5,196)	$ (294,249)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	9,840						9,840
Dividends paid	(4,314)						(4,314)
Other comprehensive income (loss), net of tax expense (benefit)	9,074							9,074
Stock-based compensation	317					317
Restricted stock grants (in shares)				184
Restricted stock grants	2			$ 2		0
Nonqualified stock option exercise (in shares)				10
Nonqualified stock option exercise	199					199
Purchase of treasury stock (in shares)				(148)
Purchase of treasury stock	(4,390)								(4,390)
Ending balance (in shares) at Mar. 31, 2016				26,635	16,554
Ending balance at Mar. 31, 2016	996,993			$ 372	$ 183	1,076,931	214,268	3,878	(298,639)
Beginning balance (in shares) at Dec. 31, 2016		34,911	16,854	34,911	16,854
Beginning balance at Dec. 31, 2016	1,292,047			$ 462	$ 186	1,368,459	247,758	(12,434)	(312,384)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	20,883						20,883
Dividends paid	(6,198)						(6,198)
Other comprehensive income (loss), net of tax expense (benefit)	(33)							(33)
Stock-based compensation	864					864
Restricted stock grants (in shares)				165
Restricted stock grants	0			$ 2		(2)
Restricted stock cancelled (in shares)				(21)
Restricted stock cancelled	(831)					(831)
Nonqualified stock option exercise (in shares)				57
Nonqualified stock option exercise	1,199					1,199
Conversion of shares (in shares)				100	(100)
Conversion of shares	0			$ 1	$ (1)
Ending balance (in shares) at Mar. 31, 2017		35,212	16,754	35,212	16,754
Ending balance at Mar. 31, 2017	$ 1,307,931			$ 465	$ 185	$ 1,369,689	$ 262,443	$ (12,467)	$ (312,384)

Consolidated Statements of Cha7

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Dividends paid (in dollars per share)	$ 0.10	$ 0.12
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income tax expense (benefit)	$ 5,564	$ (19)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net Income	$ 20,883	$ 9,840
Adjustments to reconcile net income to net cash provided by operating activities:
Accretion of purchased credit impaired loans	(18,783)	(20,843)
Depreciation and amortization	5,909	4,223
Provision for loan and lease losses	3,392	1,375
Deferred income tax	4,777	4,389
Net amortization of investment securities premium/discount	1,123	1,123
Net realized gains on investment securities	(67)	(40)
Stock-based compensation expense	864	317
Net gains on sales of OREO	(308)	(679)
OREO valuation expense	247	467
Other	(76)	(6)
Net deferred loan origination fees	(873)	1,105
Mortgage loans originated for sale	(25,391)	(29,550)
Proceeds from sales of mortgage loans originated for sale	34,533	33,021
Origination of mortgage servicing rights	(220)	0
Fees on mortgage loans originated and sold	(1,248)	(971)
Termination of loss share agreements	0	9,178
Gains on sales/disposals of premises and equipment	0	(20)
Net proceeds from FDIC loss share agreements	0	(186)
Change in other assets	(4,072)	61
Change in accrued expenses and other liabilities	(9,719)	(2,652)
Net cash provided by operating activities	10,971	10,152
Cash flows from investing activities
Purchases of investment securities available-for-sale	(263,759)	(35,489)
Purchases of investment securities held-to-maturity	0	(4,000)
Repayments of principal and maturities of investment securities available-for-sale	21,096	15,824
Repayments of principal and maturities of investment securities held-to-maturity	17,773	17,359
Net sales of FHLB and FRB stock	2,255	1,993
Net (increase) decrease in loans	(98,722)	12,854
Proceeds paid to FDIC for settlement of loss share agreements	0	(3,029)
Purchases of premises and equipment	3,061	(721)
Proceeds from sales of premises and equipment	0	550
Proceeds from sales of OREO	4,920	7,072
Net cash (used in) provided by investing activities	(313,376)	12,413
Cash flows from financing activities
Net increase in demand, money market and savings accounts	214,818	162,935
Net decrease in time deposits	(2,839)	(83,412)
Net increase in short-term borrowings	1,968	3,790
Proceeds from short-term FHLB advances	525,000	155,000
Repayment of short-term FHLB advances	(630,000)	(215,000)
Proceeds from long-term FHLB advances	75,000	0
Repayment of long-term FHLB advances	(25,050)	(49)
Excess tax benefit from share-based payment	0	19
Proceeds from exercise of stock options	1,198	180
Dividends paid	(6,198)	(4,314)
Purchases of treasury stock	0	(4,390)
Net cash provided by financing activities	153,897	14,759
Net (decrease) increase in cash and cash equivalents	(148,508)	37,324
Cash and cash equivalents at beginning of period	309,055	144,696
Cash and cash equivalents at end of period	160,547	182,020
Supplemental disclosures of cash:
Interest paid	10,301	5,390
Cash collections of contractual interest on purchased credit impaired loans	10,667	11,764
Income taxes paid	0	189
Supplemental disclosures of non-cash transactions:
OREO acquired through loan transfers	2,428	998
Transfers of other assets to OREO	$ 0	$ 1,590

Basis of Presentation

Basis of Presentation	3 Months Ended
Basis of Presentation	Mar. 31, 2017
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Nature of Operations and Principles of Consolidation Capital Bank Financial Corp. (“CBF” or the “Company”; formerly known as North American Financial Holdings, Inc.) is a bank holding company incorporated in late 2009 in Delaware and headquartered in North Carolina whose business is conducted primarily through Capital Bank Corporation (“Capital Bank Corporation” or the “Bank”). The Company was incorporated with the goal of creating a regional banking franchise in the southeastern region of the United States through organic growth and acquisitions of other banks, including failed, underperforming and undercapitalized banks. CBF has raised $955.6 million to make acquisitions through a series of private placements and an initial public offering of its common stock. Since inception, CBF has acquired eight depository institutions, including the assets and certain deposits from failed banks. CBF has a total of 193 full service banking offices located in Florida, North and South Carolina, Tennessee and Virginia. During the three months ended March 31, 2017 , the Company closed and consolidated three branches in conjunction with the merger of CommunityOne. The Company expects to close and consolidate an additional fifteen branches and incur an additional charge of approximately $4.0 million during 2017. As such, the Company transfered $6.2 million from fixed assets to bank properties held for sale during the three months ended March 31, 2017 . The accompanying unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and Regulation S-X. Accordingly, they do not include all of the information and disclosures required by U.S. GAAP for complete financial statement presentation. In the opinion of management, all adjustments consisting of normal recurring accruals and disclosures considered necessary for a fair interim presentation have been included. All significant inter-company accounts and transactions have been eliminated in consolidation. For further information, refer to the Company’s Consolidated Financial Statements and notes thereto included in the Company’s annual report on Form 10-K for the fiscal year ended December 31, 2016. Use of Estimates and Assumptions To prepare financial statements in conformity with U.S. GAAP, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as presented in the financial statements. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. Recent Accounting Pronouncements In March 2017, the Financial Accounting Standard Board (the “FASB”) Accounting Standards Update ("ASU") 2017-07, "Compensation - Retirement Benefits (Topic 715)". The amendments in this update require that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost as defined in paragraphs 715-30-35-4 and 715-60-35-9 are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. If a separate line item or items are used to present the other components of net benefit cost, that line item or items must be appropriately described. If a separate line item or items are not used, the line item or items used in the income statement to present the other components of net benefit cost must be disclosed. The amendments in this update also allow only the service cost component to be eligible for capitalization when applicable (for example, as a cost of internally manufactured inventory or a self-constructed asset). The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2017. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other (Topic 350)". The amendments in this update aim to simplify the subsequent measurement of goodwill. Under these amendments, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The FASB also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment. An entity is required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets and still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2019. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In January 2017, the FASB issued ASU 2017-01, "Business Combinations (Topic 805)". The amendments in this update provide a screen to determine when a set is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated. The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The amendments in this update should be applied prospectively on or after the effective date. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In May 2016, the FASB issued ASU 2016-12, "Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients". The amendments in this Update represent minor corrections or improvements to narrow aspects of Topic 606, as amended by ASU No. 2014-09, and do not change the core principle of the guidance in Topic 606. The effective date and transition requirements for the amendments in this Update are the same as the effective date and transition requirements for Topic 606 (and any other Topic amended by Update 2014-09), which is not yet effective. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows—Credit Losses (Topic 230)". The amendments in this update provide guidance on the following eight specific cash flow issues: (1) Debt prepayment or debt extinguishment costs; (2) Settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing; (3) Contingent consideration payments made after a business combination; (4) Proceeds from the settlement of insurance claims; (5) Proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; (6) Distributions received from equity method investees; (7) Beneficial interests in securitization transactions; (8) Separately identifiable cash flows and application of the predominance principle. The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments—Credit Losses (Topic 326)". Assets Measured at Amortized Cost—The main objective of this update is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments in this update replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates and affects loans, debt securities, trade receivables, net investments in leases, off-balance-sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. For public business entities that are U.S. Securities and Exchange Commission (SEC) filers, the amendments in this update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In March 2016, the FASB issued ASU 2016-9, "Compensation—Stock compensation (Topic 718)". Improvements to employee share-based payment accounting" which objective is the simplification through the identification, evaluation, and improvement of areas of generally accepted accounting principles (GAAP) for which cost and complexity can be reduced while maintaining or improving the usefulness of the information provided to users of financial statements. The areas for simplification involve several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Some of the areas for simplification apply only to nonpublic entities. As permitted, we early adopted this ASU during the fourth quarter of 2016. As allowed by the ASU, the Company's adoption was prospective, therefore, prior periods have not been adjusted. The adoption did not have a material impact on the Company's consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-08, “Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net)”. The amendments in this update will clarify the implementation guidance on principal versus agent considerations. Topic 606 requires an entity to determine whether the nature of its promise is to provide that good or service to the customer (that is, the entity is a principal) or to arrange for the good or service to be provided to the customer by the other party (that is, the entity is an agent). This determination is based upon whether the entity controls the good or the service before it is transferred to the customer. Topic 606 includes indicators to assist in this evaluation. The effective date and transition requirements for the amendments in this update are the same as the effective date and transition requirements for Topic 606 (and any other Topic amended by update 2014-09 listed below), which is not yet effective. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In March 2016, the FASB issued ASU 2016-7, "Investments—Equity Method and Joint Ventures (Topic 323)". The amendments in this update eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. Therefore, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments in this update require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. The amendments in this update are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The amendments should be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. Earlier application is permitted. The adoption did not have a material impact on the Company's consolidated financial statements. In March 2016, the FASB issued ASU 2016-6, "Derivatives and Hedging (Topic 815): Contingent Put and Call Options in Debt Instruments". The amendments in this update clarify the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. An entity performing the assessment under the amendments in this update is required to assess the embedded call (put) options solely in accordance with the four-step decision sequence. For public business entities, the amendments in this update are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. The adoption did not have a material impact on the Company's consolidated financial statements. In January 2016, the FASB issued ASU 2016-2, "Leases (Topic 842)" which increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. To meet that objective, the FASB is amending the FASB Accounting Standards Codification and creating Topic 842, Leases. This update, along with IFRS 16, Leases, are the results of the FASB’s and the International Accounting Standards Board’s (IASB’s) efforts to meet that objective and improve financial reporting. The FASB and IASB decided to not fundamentally change lessor accounting with the amendments in this update. However, some changes have been made to lessor accounting to conform and align that guidance with the lessee guidance and other areas within generally accepted accounting principles (GAAP), such as Topic 606, Revenue from Contracts with Customers. The main difference between previous GAAP and Topic 842 is the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. For public business entities, the amendments in ASU 2016-2 are effective for fiscal years beginning after December 15, 2018. In January 2016, the FASB issued ASU 2016-1, "Financial instruments—Overall (Subtopic 825-10)" which requires all equity investments to be measured at fair value with changes in the fair value recognized through net income (other than those accounted for under equity method of accounting or those that result in consolidation of the investee). The amendments in this update also require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. In addition, the amendments in this update eliminate the requirement to disclose the fair value of financial instruments measured at amortized cost for entities that are not public business entities and the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet for public business entities. For public business entities, the amendments in ASU 2016-1 are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of ASU 2016-1 is not expected to have a material impact on the Company's consolidated financial position, results of operations and cash flows. In May 2014, the FASB issued ASU 2014-9, "Revenue from Contracts with Customers (Topic 606)". The core principle of Topic 606 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity should (1) identify the contract(s) with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) the entity satisfies the performance obligation. In August 2015, the FASB issued ASU 2015-14, "Revenue from contracts with customers (Topic 606) - Deferral of the Effective Date". The amendments in ASU 2015-14 establish December 15, 2017 as the effective date of the information related to ASU 2014-09, “Revenue from Contracts with Customers (Topic 606)”. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows.

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
Earnings Per Common Share	Mar. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share Basic earnings per share is computed as net income attributable to common shareholders divided by the weighted average number of common shares outstanding during the period. Diluted earnings per share include the dilutive effect of additional potential common shares issuable under stock options and unvested restricted shares computed using the treasury stock method. Earnings per share have been computed based on the following: (Shares in thousands) Three Months Ended March 31, 2017 March 31, 2016 Weighted average number of shares outstanding: Basic 51,634 43,063 Dilutive effect of options outstanding 1,427 840 Dilutive effect of unvested restricted shares 66 1 Diluted 53,127 43,904 The dilutive effect of stock options and unvested restricted shares are the only common stock equivalents for purposes of calculating diluted earnings per common share. Weighted average anti-dilutive stock options and unvested restricted shares excluded from the computation of diluted earnings per share are as follows: (Shares in thousands) Three Months Ended March 31, 2017 March 31, 2016 Anti-dilutive stock options — 39 Anti-dilutive unvested restricted shares 113 —

Business Combinations and Acqui

Business Combinations and Acquisitions	3 Months Ended
Business Combinations and Acquisitions	Mar. 31, 2017
Business Combinations [Abstract]
Business Combinations and Acquisitions	Business Combinations and Acquisitions Acquisition of CommunityOne Bancorp On October 26, 2016, the Company completed its acquisition of CommunityOne Bancorp (“CommunityOne”) whereby CommunityOne merged with and into the Company. CommunityOne was a North Carolina-based bank with $2.4 billion in assets and 45 full service banking branches as of October 26, 2016. The combination will strengthen Capital Bank’s franchise in North Carolina, particularly in Charlotte, as well as in Greensboro/Winston Salem and the Catawba/Caldwell county area . The Company acquired 100% of the outstanding common stock of CommunityOne. The total purchase price for CommunityOne was $340.5 million , consisting of $51.9 million of cash, and the issuance of 8.9 million shares of Capital Bank Common Stock valued at $288.6 million based on the Company's stock on October 25, 2016. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. Accordingly, the Company recognizes amounts for identifiable assets acquired and liabilities assumed at their estimated acquisition date fair value, with any excess of purchase consideration over the net assets being reported as goodwill. As the fair value of consideration paid exceeded the estimated fair value of net assets acquired, nondeductible goodwill of $103.4 million was recorded. Fair value estimates are based on the information available, and are subject to change for up to one year after the closing date of the acquisition as additional information relative to the closing date fair values becomes available. During the three months ended March 31, 2017 , the Company adjusted the acquisition date balance sheet to reflect (1) a $0.4 million increase due to a recovery on a fully charged off loan; (2) a $1.0 million increase in the deferred tax asset; and (3) a $1.4 million decrease in Goodwill caused by the net effect of these adjustments. These adjustments are reflected in the table below. Management continues to review initial estimates on certain areas such as loan valuations, core deposit intangibles and the deferred tax asset. The following table summarizes the Company's investment and CommunityOne's opening balance sheet as of October 26, 2016 adjusted to their preliminary fair value: (Dollars in thousands) Fair value of assets acquired: October 26, 2016 Cash and cash equivalents $ 58,308 Investment securities 488,814 Loans 1,497,785 Premises and equipment 46,763 Goodwill 103,443 Other intangible assets 22,518 Deferred tax asset 60,695 Other assets 82,716 Total assets acquired 2,361,042 Fair value of liabilities assumed: Deposits 1,892,443 Long term debt and other borrowings 105,720 Other liabilities 22,345 Total liabilities assumed 2,020,508 Net assets acquired $ 340,534 The following table summarizes the fair value of loans, the total contractual principal and interest payments, and management's estimate of expected total cash payments of purchase credit impaired loans: (Dollars in thousands) Fair Value of Acquired Loans Gross Contractual Amounts Receivable Best Estimate of Contractual Cash Flows not to be Collected Loans acquired subject to ASC 310-30 $ 129,075 $ 182,927 $ 34,219 In addition, the Bank acquired loans of $1.4 billion not determined to be purchase credit impaired at the time of acquisition. These loans have an estimated cash flow of $1.6 billion and management expects to collect contractual required payments from the borrower with similar characteristics as other non-impaired loans. In the assumption of deposit liabilities, the Company estimated the fair value of the core deposits intangible asset to be $19.9 million , which will be amortized utilizing an accelerated amortization method over an estimated economic life of 10 years . Fair value estimates are based on factors such as type of deposit, retention rates, interest rates and customer relationships. Pro-forma financial information Pro-forma data for the three months ending March 31, 2017 and March 31, 2016 listed in the table below presents pro-forma information as if the CommunityOne acquisition occurred at the beginning of 2016. The results include $3.0 million and $1.7 million of transaction and integration expense incurred during the three months ended March 31, 2017 and March 31, 2016, respectively. The pro-forma financial information is not necessarily indicative of the results of operations that would have occurred had the transactions been effected on the assumed dates. (Dollars and shares in thousands, except per share data) For the three months ended March 31, 2017 For the three months ended March 31, 2016 Net interest income $ 82,116 $ 78,072 Net income $ 20,883 $ 13,154 Basic earnings per share $ 0.40 $ 0.25 Diluted earnings per share $ 0.39 $ 0.25

Investment Securities

Investment Securities	3 Months Ended
Investment Securities	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities Trading securities totaled $ 4.2 million and $3.8 million at March 31, 2017 and December 31, 2016 , respectively. The amortized cost and estimated fair value of investment securities available-for-sale and held-to-maturity at March 31, 2017 and December 31, 2016 , are presented below: (Dollars in thousands) March 31, 2017 Amortized Unrealized Unrealized Estimated Available-for-Sale Corporate bonds $ 59,737 $ 1,508 $ 143 $ 61,102 State and political subdivisions—tax exempt 11,868 — 706 11,162 Mortgage-backed securities—residential issued by government sponsored entities 1,094,322 1,617 16,843 1,079,096 Industrial revenue bonds 3,068 68 — 3,136 Total $ 1,168,995 $ 3,193 $ 17,692 $ 1,154,496 Held-to-Maturity U.S. Government agencies $ 10,679 $ 111 $ — $ 10,790 Corporate bonds 94,008 600 738 93,870 State and political subdivisions—tax exempt 8,129 532 — 8,661 State and political subdivisions—taxable 518 12 — 530 Mortgage-backed securities—residential issued by government sponsored entities 332,686 1,462 2,303 331,845 Total $ 446,020 $ 2,717 $ 3,041 $ 445,696 (Dollars in thousands) December 31, 2016 Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value Available-for-Sale Corporate bonds $ 28,354 $ 786 $ 187 $ 28,953 State and political subdivisions—tax exempt 11,871 — 794 11,077 Mortgage-backed securities—residential issued by government sponsored entities 883,802 1,644 16,524 868,922 Industrial revenue bonds 3,239 59 — 3,298 Total $ 927,266 $ 2,489 $ 17,505 $ 912,250 Held-to-Maturity U.S. Government agencies $ 11,234 $ 77 $ — $ 11,311 Corporate bonds 94,010 279 2,301 91,988 State and political subdivisions—tax exempt 8,069 389 — 8,458 State and political subdivisions—taxable 520 13 — 533 Mortgage-backed securities—residential issued by government sponsored entities 350,126 1,081 2,586 348,621 Total $ 463,959 $ 1,839 $ 4,887 $ 460,911 There were no sales of securities during the three months ended March 31, 2017 and March 31, 2016. The estimated fair value of investment securities at March 31, 2017 , by contractual maturity, is shown in the table that follows. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations without call or prepayment penalties. Debt securities not due at a single maturity date are shown separately. (Dollars in thousands) March 31, 2017 Amortized Estimated Yield Available-for-Sale Due in one year or less $ — $ — — % Due after one year through five years — — — % Due after five years through ten years 30,197 31,051 3.10 % Due after ten years 44,476 44,349 2.85 % Mortgage-backed securities—residential issued by government sponsored entities 1,094,322 1,079,096 2.32 % Total $ 1,168,995 $ 1,154,496 2.36 % Amortized Estimated Yield Held-to-Maturity Due in one year or less $ 697 $ 699 1.72 % Due after one year through five years 59,749 59,612 4.90 % Due after five years through ten years 41,691 42,220 5.04 % Due after ten years 11,197 11,320 2.86 % Mortgage-backed securities—residential issued by government sponsored entities 332,686 331,845 2.37 % Total $ 446,020 $ 445,696 2.97 % Securities with unrealized losses not recognized in income, and the period of time they have been in an unrealized loss position, are as follows: (Dollars in thousands) Less than 12 Months 12 Months or Longer Total March 31, 2017 Estimated Unrealized Estimated Unrealized Estimated Unrealized Available-for-Sale Corporate bonds $ 20,396 $ 143 $ — $ — $ 20,396 $ 143 State and political subdivisions—tax exempt 11,162 706 — — 11,162 706 Mortgage-backed securities—residential issued by government sponsored entities 823,743 16,843 — — 823,743 16,843 Total $ 855,301 $ 17,692 $ — $ — $ 855,301 $ 17,692 Held-to-Maturity U.S. government agencies $ 10,790 $ 333 $ — $ — $ 10,790 $ 333 Corporate bonds 14,975 25 29,325 713 44,300 738 Mortgage-backed securities—residential issued by government sponsored entities 257,034 5,579 8,006 325 265,040 5,904 Total $ 282,799 $ 5,937 $ 37,331 $ 1,038 $ 320,130 $ 6,975 (Dollars in thousands) Less than 12 Months 12 Months or Longer Total December 31, 2016 Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Available-for-Sale Corporate bonds $ — $ — $ 8,412 $ 187 $ 8,412 $ 187 State and political subdivisions - tax exempt 11,077 794 — — 11,077 794 Mortgage-backed securities—residential issued by government sponsored entities 672,672 16,524 — — 672,672 16,524 Total $ 683,749 $ 17,318 $ 8,412 $ 187 $ 692,161 $ 17,505 Held-to-Maturity U.S Government agencies $ 11,311 $ 402 $ — $ — $ 11,311 $ 402 Corporate bonds 24,629 371 28,112 1,930 52,741 2,301 Mortgage-backed securities—residential issued by government sponsored entities 276,555 6,614 8,494 332 285,049 6,946 Total $ 312,495 $ 7,387 $ 36,606 $ 2,262 $ 349,101 $ 9,649 As of March 31, 2017 , the Company’s security portfolio consisted of 176 securities, 91 of which were in an unrealized loss position. The majority of unrealized losses are related to the Company’s corporate bonds and mortgage-backed securities. The corporate bonds in an unrealized loss position at March 31, 2017 and December 31, 2016 continue to perform and are expected to perform through maturity. Unrealized losses associated with these securities are primarily due to changes in interest rates and market volatility, and the corporate issuers have not experienced significant adverse events that would call into question their ability to repay those debt obligations according to contractual terms. Further, because the Company does not have the intent to sell these corporate bonds and it is more likely than not that it will not be required to sell the securities before their anticipated recovery of their amortized cost bases, the Company does not consider these securities to be other-than-temporarily impaired as of March 31, 2017 or December 31, 2016 . All of the mortgage-backed securities at March 31, 2017 and December 31, 2016 were issued by U.S. government-sponsored entities and agencies, which the government has affirmed its commitment to support. Unrealized losses associated with these securities are attributable to changes in interest rates and illiquidity, and not credit quality, and because the Company does not have the intent to sell these mortgage-backed securities and it is more likely than not that it will not be required to sell the securities before their anticipated recovery, the Company does not consider these securities to be other-than-temporarily impaired at March 31, 2017 or December 31, 2016 . Investment securities having carrying values of approximately $660.3 million and $621.8 million at March 31, 2017 and December 31, 2016 , respectively, were pledged to secure public funds on deposit, securities sold under agreements to repurchase, and for other purposes as required by law.

Loans

Loans	3 Months Ended
Loans	Mar. 31, 2017
Receivables [Abstract]
Loans	Loans Major classifications of loans, including loans held for sale, are as follows: (Dollars in thousands) March 31, 2017 December 31, 2016 Non-owner occupied commercial real estate $ 1,187,344 $ 1,130,883 Other commercial construction and land 350,401 327,622 Multifamily commercial real estate 115,996 117,515 1-4 family residential construction and land 157,920 140,030 Total commercial real estate 1,811,661 1,716,050 Owner occupied commercial real estate 1,313,086 1,321,405 Commercial and industrial 1,443,828 1,468,874 Total commercial 2,756,914 2,790,279 1-4 family residential 1,787,097 1,714,702 Home equity loans 502,099 507,759 Other consumer loans 422,775 448,972 Total consumer 2,711,971 2,671,433 Other 231,409 228,430 Total loans $ 7,511,955 $ 7,406,192 Total loans include $5.0 million and $12.9 million of loans held for sale and $16.4 million and $15.5 million of net deferred loan origination costs and fees as of March 31, 2017 and December 31, 2016 , respectively. As of March 31, 2017 , other loans include $43.5 million , $151.6 million and $1.4 million of farm land, state and political subdivision obligations and deposit customer overdrafts, respectively. As of December 31, 2016 , other loans include $41.9 million , $149.0 million and $1.6 million of farm land, state and political subdivision obligations and deposit customer overdrafts, respectively. The Company designates purchased credit impaired loans as "PCI" by evaluating both qualitative and quantitative factors. At the time of acquisition, the Company accounted for the PCI loans by segregating each portfolio into loan pools with similar risk characteristics. Over the lives of the acquired PCI loans, the Company continues to estimate cash flows expected to be collected on each loan pool. The Company evaluates, at each balance sheet date, whether its estimates of the present value of the cash flows from the loan pools, determined using the effective interest rates, has decreased, such that the present value of such cash flows is less than the recorded investment of the pool, and if so, recognizes a provision for loan loss in its Consolidated Statements of Income, unless related to non-credit events. Additionally, if the Company has favorable changes in estimates of cash flows expected to be collected for a loan pool such that the then-present value exceeds the recorded investment of that pool, the Company will first reverse any previously established allowance for loan and lease losses for the pool. If such estimate exceeds the amount of any previously established allowance, the Company will accrete future interest income over the remaining life of the pool at a rate which, when used to discount the expected cash flows, results in the then-present value of such cash flows equaling the recorded investment of the pool at the time of the revised estimate. The table below presents a roll forward of accretable yield and income expected to be earned related to PCI loans and the amount of nonaccretable difference at the end of the period. Nonaccretable difference represents estimated contractually required payments in excess of estimated cash flows expected to be collected. The accretable yield represents the excess of estimated cash flows expected to be collected over the carrying amount of the PCI loans. Other represents reductions of accretable yield due to non-credit events such as interest rate reductions on variable rate PCI loans and prepayment activity on PCI loans. (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Accretable Yield Balance at beginning of period $ 161,639 $ 208,844 Accretion of income (18,783 ) (20,843 ) Reclassification from nonaccretable difference 16,357 14,937 Other (6,559 ) (7,873 ) Balance at end of period $ 152,654 $ 195,065 Nonaccretable difference, balance at the end of the period $ 127,657 $ 134,060 The accretable yield is accreted into interest income over the estimated life of the PCI loans using the level yield method. The accretable yield will change due to changes in: • The estimate of the remaining life of PCI loans which may change the amount of future interest income, and possibly principal, expected to be collected; • The estimate of the amount of contractually required principal and interest payments over the estimated life that will not be collected (the nonaccretable difference); and • Indices for PCI loans with variable rates of interest. For PCI loans, the impact of loan modifications is included in the evaluation of expected cash flows for subsequent decreases or increases of cash flows. For variable rate PCI loans, expected future cash flows will be recalculated as the rates adjust over the lives of the loans. At acquisition, the expected future cash flows were based on the variable rates that were in effect at that time. The following is a summary of the major categories of loans outstanding as of March 31, 2017 and December 31, 2016 : (Dollars in thousands) Non-PCI Loans March 31, 2017 New Acquired PCI Loans Total Non-owner occupied commercial real estate $ 744,502 $ 215,582 $ 227,260 $ 1,187,344 Other commercial construction and land 208,508 76,406 65,487 350,401 Multifamily commercial real estate 79,411 16,266 20,319 115,996 1-4 family residential construction and land 131,600 26,007 313 157,920 Total commercial real estate 1,164,021 334,261 313,379 1,811,661 Owner occupied commercial real estate 910,444 233,223 169,419 1,313,086 Commercial and industrial loans 1,270,575 89,755 83,498 1,443,828 Total commercial 2,181,019 322,978 252,917 2,756,914 1-4 family residential 1,089,469 497,469 200,159 1,787,097 Home equity loans 179,315 259,135 63,649 502,099 Other consumer loans 315,339 80,287 27,149 422,775 Total consumer 1,584,123 836,891 290,957 2,711,971 Other 194,182 8,207 29,020 231,409 Total loans $ 5,123,345 $ 1,502,337 $ 886,273 $ 7,511,955 (Dollars in thousands) Non-PCI Loans December 31, 2016 New Acquired PCI Loans Total Loans Non-owner occupied commercial real estate $ 680,044 $ 221,304 $ 229,535 $ 1,130,883 Other commercial construction and land 182,486 73,248 71,888 327,622 Multifamily commercial real estate 77,694 19,108 20,713 117,515 1-4 family residential construction and land 105,816 33,831 383 140,030 Total commercial real estate 1,046,040 347,491 322,519 1,716,050 Owner occupied commercial real estate 901,957 239,982 179,466 1,321,405 Commercial and industrial loans 1,283,012 96,494 89,368 1,468,874 Total commercial 2,184,969 336,476 268,834 2,790,279 1-4 family residential 994,323 505,420 214,959 1,714,702 Home equity loans 172,883 268,093 66,783 507,759 Other consumer loans 330,423 88,134 30,415 448,972 Total consumer 1,497,629 861,647 312,157 2,671,433 Other 185,839 9,776 32,815 228,430 Total loans $ 4,914,477 $ 1,555,390 $ 936,325 $ 7,406,192 The following tables present the aging of the recorded investment in past due loans, based on contractual terms, as of March 31, 2017 : (Dollars in thousands) 30-89 Days Past Due Greater than 90 Days Past Due Non-accrual Total Non-purchased credit impaired loans Non-owner occupied commercial real estate $ — $ — $ 2,324 $ 2,324 Other commercial construction and land 120 — 192 312 Multifamily commercial real estate — — — — 1-4 family residential construction and land — — — — Total commercial real estate 120 — 2,516 2,636 Owner occupied commercial real estate — — 4,443 4,443 Commercial and industrial loans 3 — 760 763 Total commercial 3 — 5,203 5,206 1-4 family residential 625 — 968 1,593 Home equity loans 1,350 — 2,246 3,596 Other consumer loans 4,854 — 2,675 7,529 Total consumer 6,829 — 5,889 12,718 Other — — — — Total loans $ 6,952 $ — $ 13,608 $ 20,560 (Dollars in thousands) 30-89 Days Past Due Greater than 90 Days Past Due Non-accrual Total Purchased credit impaired loans * Non-owner occupied commercial real estate $ 13 $ 400 $ — $ 413 Other commercial construction and land 276 880 — 1,156 Multifamily commercial real estate — 432 — 432 1-4 family residential construction and land — — — — Total commercial real estate 289 1,712 — 2,001 Owner occupied commercial real estate 1,158 4,101 — 5,259 Commercial and industrial loans 333 333 — 666 Total commercial 1,491 4,434 — 5,925 1-4 family residential 1,920 2,592 — 4,512 Home equity loans 855 1,129 — 1,984 Other consumer loans 2,467 894 — 3,361 Total consumer 5,242 4,615 — 9,857 Other 294 681 — 975 Total loans $ 7,316 $ 11,442 $ — $ 18,758 The following tables present the aging of the recorded investment in past due loans, based on contractual terms, as of December 31, 2016 : (Dollars in thousands) 30-89 Days Past Due Greater than 90 Days Past Due and Still Accruing/Accreting Non-accrual Total Non-purchased credit impaired loans Non-owner occupied commercial real estate $ — $ — $ 2,584 $ 2,584 Other commercial construction and land 23 — 204 227 Multifamily commercial real estate — — — — 1-4 family residential construction and land 148 — — 148 Total commercial real estate 171 — 2,788 2,959 Owner occupied commercial real estate 2,633 — 2,950 5,583 Commercial and industrial loans 169 — 698 867 Total commercial 2,802 — 3,648 6,450 1-4 family residential 493 — 1,048 1,541 Home equity loans 1,336 — 1,568 2,904 Other consumer loans 8,143 — 2,397 10,540 Total consumer 9,972 — 5,013 14,985 Other — — — — Total loans $ 12,945 $ — $ 11,449 $ 24,394 (Dollars in thousands) 30-89 Days Past Due Greater than 90 Days Past Due and Still Accruing/Accreting Non-accrual Total Purchased credit impaired loans * Non-owner occupied commercial real estate $ — $ 1,130 $ — $ 1,130 Other commercial construction and land 550 777 — 1,327 Multifamily commercial real estate — 420 — 420 1-4 family residential construction and land — — — — Total commercial real estate 550 2,327 — 2,877 Owner occupied commercial real estate 1,844 3,776 — 5,620 Commercial and industrial loans 592 509 — 1,101 Total commercial 2,436 4,285 — 6,721 1-4 family residential 4,288 6,060 — 10,348 Home equity loans 1,128 1,470 — 2,598 Other consumer loans 2,558 1,048 — 3,606 Total consumer 7,974 8,578 — 16,552 Other 87 716 — 803 Total loans $ 11,047 $ 15,906 $ — $ 26,953 * Pooled PCI loans are not classified as nonaccrual as they are considered to be accruing because their interest income relates to the accretable yield recognized under accounting for purchased credit-impaired loans and not to contractual interest payments. Credit Quality Indicators The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans as to credit risk. This analysis is performed at origination and upon identification of a material change for all loans, on an annual basis for commercial loans exceeding $0.5 million , and at least quarterly for commercial loans not rated pass. The Company uses the following definitions for risk ratings: • Pass —These loans range from superior quality with minimal credit risk to loans requiring heightened management attention but that are still an acceptable risk and continue to perform as contracted. • Special Mention —Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date. • Substandard —Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected. • Doubtful —Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. The following table summarizes loans, excluding PCI loans, by internal rating at March 31, 2017 : Substandard (Dollars in thousands) Pass Special Mention Accruing Non-accrual Doubtful Total Non-owner occupied commercial real estate $ 954,965 $ 2,795 $ — $ 2,324 $ — $ 960,084 Other commercial construction and land 284,722 — — 192 — 284,914 Multifamily commercial real estate 95,477 — 200 — — 95,677 1-4 family residential construction and land 157,607 — — — — 157,607 Total commercial real estate 1,492,771 2,795 200 2,516 — 1,498,282 Owner occupied commercial real estate 1,108,754 26,546 3,924 4,443 — 1,143,667 Commercial and industrial loans 1,327,963 16,219 15,388 760 — 1,360,330 Total commercial 2,436,717 42,765 19,312 5,203 — 2,503,997 1-4 family residential 1,582,693 1,146 2,131 968 — 1,586,938 Home equity loans 434,571 60 1,573 2,246 — 438,450 Other consumer loans 392,908 — 43 2,675 — 395,626 Total consumer 2,410,172 1,206 3,747 5,889 — 2,421,014 Other 202,389 — — — — 202,389 Total loans $ 6,542,049 $ 46,766 $ 23,259 $ 13,608 $ — $ 6,625,682 The following table summarizes loans, excluding PCI loans, by internal rating at December 31, 2016 : Substandard (Dollars in thousands) Pass Special Mention Accruing Non-accrual Doubtful Total Non-owner occupied commercial real estate $ 896,394 $ 1,251 $ 1,119 $ 2,584 $ — $ 901,348 Other commercial construction and land 255,530 — — 204 — 255,734 Multifamily commercial real estate 96,802 — — — — 96,802 1-4 family residential construction and land 139,647 — — — — 139,647 Total commercial real estate 1,388,373 1,251 1,119 2,788 — 1,393,531 Owner occupied commercial real estate 1,124,285 10,210 4,494 2,950 — 1,141,939 Commercial and industrial loans 1,351,581 16,709 10,518 698 — 1,379,506 Total commercial 2,475,866 26,919 15,012 3,648 — 2,521,445 1-4 family residential 1,495,653 899 2,143 1,048 — 1,499,743 Home equity loans 437,880 62 1,466 1,568 — 440,976 Other consumer loans 416,117 — 43 2,397 — 418,557 Total consumer 2,349,650 961 3,652 5,013 — 2,359,276 Other 195,615 — — — — 195,615 Total loans $ 6,409,504 $ 29,131 $ 19,783 $ 11,449 $ — $ 6,469,867

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses	3 Months Ended
Allowance for Loan and Lease Losses	Mar. 31, 2017
Receivables [Abstract]
Allowance for Loan and Lease Losses	Allowance for Loan and Lease Losses Activity in the allowance for loan and lease losses for the three months ended March 31, 2017 and 2016 is as follows: (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Balance, beginning of period $ 43,065 $ 45,034 Provision (reversal) for loan losses for PCI loans 186 (9 ) Provision for loan losses for non-PCI loans 3,206 1,384 Non-PCI loans charged-off (3,183 ) (1,824 ) Recoveries of non-PCI loans previously charged-off 617 678 Balance, end of period $ 43,891 $ 45,263 The following tables present the roll forward of the allowance for loan and lease losses for the three months ended March 31, 2017 and 2016 by the class of loans against which the allowance is allocated: (Dollars in thousands) December 31, 2016 Provision/ Net (Charge-offs)/ March 31, 2017 Non-owner occupied commercial real estate $ 1,989 $ (749 ) $ 1 $ 1,241 Other commercial construction and land 12,692 974 2 13,668 Multifamily commercial real estate 171 — — 171 1-4 family residential construction and land 666 73 2 741 Total commercial real estate 15,518 298 5 15,821 Owner occupied commercial real estate 1,397 87 2 1,486 Commercial and industrial loans 9,509 (377 ) (214 ) 8,918 Total commercial 10,906 (290 ) (212 ) 10,404 1-4 family residential 9,188 (308 ) — 8,880 Home equity loans 1,214 (179 ) 44 1,079 Other consumer loans 5,890 3,588 (2,068 ) 7,410 Total consumer 16,292 3,101 (2,024 ) 17,369 Other 349 283 (335 ) 297 Total loans $ 43,065 $ 3,392 $ (2,566 ) $ 43,891 (Dollars in thousands) December 31, 2015 Provision/ Net(Charge-offs)/ March 31, 2016 Non-owner occupied commercial real estate $ 1,598 $ 66 $ 7 $ 1,671 Other commercial construction and land 12,919 274 3 13,196 Multifamily commercial real estate 186 (4 ) — 182 1-4 family residential construction and land 1,275 9 1 1,285 Total commercial real estate 15,978 345 11 16,334 Owner occupied commercial real estate 1,505 262 (80 ) 1,687 Commercial and industrial loans 9,627 465 37 10,129 Total commercial 11,132 727 (43 ) 11,816 1-4 family residential 11,057 (688 ) 5 10,374 Home equity loans 1,853 (370 ) 112 1,595 Other consumer loans 4,751 991 (900 ) 4,842 Total consumer 17,661 (67 ) (783 ) 16,811 Other 263 370 (331 ) 302 Total loans $ 45,034 $ 1,375 $ (1,146 ) $ 45,263 The following tables present the roll forward of the allowance for loan and lease losses for PCI and non-PCI loans for the three months ended March 31, 2017 and 2016 , by the class of loans against which the allowance is allocated: (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Non-PCI PCI Total Non-PCI PCI Total Allowance for loan and lease losses at the beginning of the period $ 20,050 $ 23,015 $ 43,065 $ 20,546 $ 24,488 $ 45,034 Charge-offs: Non-owner occupied commercial real estate — — — (1 ) — (1 ) Other commercial construction and land — — — — — — Multifamily commercial real estate — — — — — — 1-4 family residential construction and land — — — — — — Total commercial real estate — — — (1 ) — (1 ) Owner occupied commercial real estate (6 ) — (6 ) (80 ) — (80 ) Commercial and industrial loans (240 ) — (240 ) (1 ) — (1 ) Total commercial (246 ) — (246 ) (81 ) — (81 ) 1-4 family residential (2 ) — (2 ) — — — Home equity loans (39 ) — (39 ) (61 ) — (61 ) Other consumer loans (2,322 ) — (2,322 ) (1,129 ) — (1,129 ) Total consumer (2,363 ) — (2,363 ) (1,190 ) — (1,190 ) Other (574 ) — (574 ) (552 ) — (552 ) Total charge-offs (3,183 ) — (3,183 ) (1,824 ) — (1,824 ) Recoveries: Non-owner occupied commercial real estate 1 — 1 8 — 8 Other commercial construction and land 2 — 2 3 — 3 Multifamily commercial real estate — — — — — — 1-4 family residential construction and land 2 — 2 1 — 1 Total commercial real estate 5 — 5 12 — 12 Owner occupied commercial real estate 8 — 8 — — — Commercial and industrial loans 26 — 26 38 — 38 Total commercial 34 — 34 38 — 38 1-4 family residential 2 — 2 5 — 5 Home equity loans 83 — 83 173 — 173 Other consumer loans 254 — 254 229 — 229 Total consumer 339 — 339 407 — 407 Other 239 — 239 221 — 221 Total recoveries 617 — 617 678 — 678 Net charge-offs (2,566 ) — (2,566 ) (1,146 ) — (1,146 ) Provision (reversal) for loan and lease losses: Non-owner occupied commercial real estate 29 (778 ) (749 ) (51 ) 117 66 Other commercial construction and land (150 ) 1,124 974 (103 ) 377 274 Multifamily commercial real estate 26 (26 ) — (14 ) 10 (4 ) 1-4 family residential construction and land 73 — 73 41 (32 ) 9 Total commercial real estate (22 ) 320 298 (127 ) 472 345 Owner occupied commercial real estate 146 (59 ) 87 138 124 262 Commercial and industrial loans (688 ) 311 (377 ) 306 159 465 Total commercial (542 ) 252 (290 ) 444 283 727 1-4 family residential (82 ) (226 ) (308 ) (100 ) (588 ) (688 ) Home equity loans (13 ) (166 ) (179 ) (155 ) (215 ) (370 ) Other consumer loans 3,549 39 3,588 984 7 991 Total consumer 3,454 (353 ) 3,101 729 (796 ) (67 ) Other 316 (33 ) 283 338 32 370 Total provision (reversal) for loan and lease losses 3,206 186 3,392 1,384 (9 ) 1,375 Allowance for loan and lease losses at the end of the period $ 20,690 $ 23,201 $ 43,891 $ 20,784 $ 24,479 $ 45,263 The following table presents the balance in the allowance for loan and lease losses and the recorded investment in loans by class of loan and by impairment evaluation method as of March 31, 2017 : (Dollars in thousands) Allowance for Loan and Lease Losses Loans Individually Collectively Purchased Individually Collectively Purchased Non-owner occupied commercial real estate $ — $ 989 $ 252 $ 2,797 $ 957,287 $ 227,260 Other commercial construction and land 22 1,528 12,118 123 284,791 65,487 Multifamily commercial real estate — 75 96 — 95,677 20,319 1-4 family residential construction and land — 741 — — 157,607 313 Total commercial real estate 22 3,333 12,466 2,920 1,495,362 313,379 Owner occupied commercial real estate 1 1,289 196 8,670 1,134,997 169,419 Commercial and industrial loans — 5,628 3,290 9,377 1,350,953 83,498 Total commercial 1 6,917 3,486 18,047 2,485,950 252,917 1-4 family residential 122 2,053 6,705 1,969 1,579,989 200,159 Home equity loans 126 541 412 1,451 436,999 63,649 Other consumer loans 12 7,279 119 453 395,173 27,149 Total consumer 260 9,873 7,236 3,873 2,412,161 290,957 Other — 284 13 — 202,389 29,020 Total loans $ 283 $ 20,407 $ 23,201 $ 24,840 $ 6,595,862 $ 886,273 (1) Loans collectively evaluated for impairment include $1.4 billion of acquired loans which are presented net of unamortized purchase discounts of $18.5 million . The following table presents the balance in the allowance for loan and lease losses and the recorded investment in loans by class of loan and by impairment evaluation method as of December 31, 2016 : (Dollars in thousands) Allowance for Loan and Lease Losses Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Purchased Credit- Impaired Individually Evaluated for Impairment Collectively Evaluated for Impairment (1) Purchased Credit- Impaired Non-owner occupied commercial real estate $ — $ 959 $ 1,030 $ 2,835 $ 898,513 $ 229,535 Other commercial construction and land 20 1,678 10,994 109 255,625 71,888 Multifamily commercial real estate — 49 122 — 96,802 20,713 1-4 family residential construction and land — 666 — — 139,647 383 Total commercial real estate 20 3,352 12,146 2,944 1,390,587 322,519 Owner occupied commercial real estate 1 1,141 255 8,858 1,133,081 179,466 Commercial and industrial loans 6 6,524 2,979 9,548 1,369,958 89,368 Total commercial 7 7,665 3,234 18,406 2,503,039 268,834 1-4 family residential 121 2,136 6,931 1,963 1,484,906 214,959 Home equity loans 113 523 578 1,392 439,584 66,783 Other consumer loans 13 5,797 80 452 418,105 30,415 Total consumer 247 8,456 7,589 3,807 2,342,595 312,157 Other — 303 46 — 195,615 32,815 Total loans $ 274 $ 19,776 $ 23,015 $ 25,157 $ 6,431,836 $ 936,325 (1) Loans collectively evaluated for impairment include $1.6 billion of acquired loans which are presented net of unamortized purchase discounts of $20.0 million . For the three months ended March 31, 2017 and March 31, 2016 , the amount of interest income recognized on loans that were impaired was not material . Troubled Debt Restructuring If a borrower is experiencing financial difficulty, the Bank may consider, in certain circumstances, modifying the terms of their loan to maximize collection of amounts due. A troubled debt restructuring (“TDR”) typically involves either a reduction of the stated interest rate of the loan, an extension of the loan’s maturity date(s) with a stated rate lower than the current market rate for a new loan with similar risk, or in limited circumstances, a reduction of the principal balance of the loan or the loan’s accrued interest. Upon modification of a loan, the Bank measures the related impairment as the excess of the recorded investment in the loan over the discounted expected future cash flows. The present value of expected future cash flows is discounted at the loan’s effective interest rate. If the impairment analysis results in a loss, an allowance for loan and lease losses is established for the loan. During the three months ended March 31, 2017 and 2016 , loans modified in TDRs were nominal. Because of the insignificance of the amount and the nature of the modifications, the modifications did not have a material impact on the Company’s Consolidated Financial Statements or on the determination of the allowance for loan and lease losses at March 31, 2017 and 2016 . The Company had loans modified in TDRs with recorded investments of $2.4 million , $2.7 million and $1.4 million as of March 31, 2017 , December 31, 2016 and March 31, 2016 , respectively.

Other Real Estate Owned

Other Real Estate Owned	3 Months Ended
Other Real Estate Owned	Mar. 31, 2017
Banking and Thrift [Abstract]
Other Real Estate Owned	Other Real Estate Owned The activity within Other Real Estate Owned (“OREO”) for the three months ended March 31, 2017 and 2016 is presented in the table below. For the three months ended March 31, 2017 and 2016 , proceeds on sales of OREO were $4.9 million and $7.1 million , respectively and net gains were $0.3 million and $0.7 million , respectively. (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Balance, beginning of period $ 53,482 $ 52,776 Real estate acquired from borrowers and transfers from other assets 2,428 2,588 Valuation allowance (247 ) (467 ) Properties sold (4,613 ) (6,392 ) Balance, end of period $ 51,050 $ 48,505

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances and Short-Term Borrowings	3 Months Ended
Federal Home Loan Bank Advances and Short-Term Borrowings	Mar. 31, 2017
Advances from Federal Home Loan Banks [Abstract]
Federal Home Loan Bank Advances and Short-Term Borrowings	Federal Home Loan Bank Advances and Short-Term Borrowings Short-term borrowings include securities sold under agreements to repurchase, cash received from counterparties as collateral for mark-to-market exposure on interest rate swaps, and advances from the Federal Home Loan Bank (“FHLB”) . The Bank has securities sold under agreements to repurchase with customers. These overnight agreements are collateralized by investment securities of the United States Government or its agencies which are chosen by the Bank. The amounts outstanding at March 31, 2017 and December 31, 2016 were $20.4 million and $18.0 million , respectively, and were collateralized by $27.0 million and $27.6 million , respectively, of agency mortgage-backed securities. The Bank has $0.7 million and $1.2 million of short term borrowings related to cash received from counterparties as collateral for mark-to-market exposure on interest rate swaps at March 31, 2017 and December 31, 2016 , respectively. The Bank invests in FHLB stock for the purpose of establishing credit lines with the FHLB. The credit availability to the Bank is based on a percentage of the Bank’s total assets as reported on the most recent quarterly financial information submitted to the regulators subject to the pledging of sufficient collateral. The Bank’s collateral with the FHLB consists of a blanket floating lien pledge of the Bank’s residential 1-4 family mortgage, multifamily, home equity line of credit and commercial real estate secured loans. The amounts of eligible collateral at March 31, 2017 and December 31, 2016 provided for incremental borrowing availability of up to $552.7 million and $415.9 million , respectively. At March 31, 2017 and December 31, 2016 , the Bank had $15.3 million and $15.4 million in letters of credit issued by the FHLB respectively, of which $15.0 million and $15.2 million are used as collateral for public funds deposits in lieu of pledging securities to the State of Florida, respectively. The FHLB advances as of March 31, 2017 and December 31, 2016 consisted of the following: (Dollars in thousands) Contractual Outstanding Amount March 31, 2017 Maturity Date Interest Rate as of March 31, 2017 $ 50,000 May 19, 2017 1.07% 230 November 6, 2017 0.50% 50,000 November 20, 2017 0.87% (1 Month FRC + 2 bps)* 50,000 November 23, 2018 0.91% (1 Month FRC + 2 bps)* 50,000 December 31, 2019 0.92% (1 Month FRC + 2 bps)* 60,000 May 28, 2020 0.92% (1 Month FRC + 2 bps)* 80,000 September 20, 2021 0.93% (1 Month FRC + 8 bps)* 75,000 September 29, 2021 0.98% (1 Month FRC + 8 bps)* 75,000 January 20, 2022 0.93% (1 Month FRC + 8 bps)* 420 February 10, 2026 —% $ 490,650 (Dollars in thousands) Contractual Outstanding Amount December 31, 2016 Maturity Date Interest Rate as of December 31, 2016 $ 25,000 January 20, 2017 0.63% 155,000 May 19, 2017 0.80% 271 November 6, 2017 0.50% 50,000 November 20, 2017 0.65% (1 Month FRC + 2 bps)* 50,000 November 23, 2018 0.66% (1 Month FRC + 2 bps)* 50,000 December 31, 2019 0.64% (1 Month FRC + 2 bps)* 60,000 May 28, 2020 0.63% (1 Month FRC + 2 bps)* 80,000 September 20, 2021 0.71% (1 Month FRC + 8 bps)* 75,000 September 29, 2021 0.71% (1 Month FRC + 8 bps)* 430 February 10, 2026 —% $ 545,701 (*) FRC = FHLB Fixed Rate Credit interest rate.

Long-Term Borrowings

Long-Term Borrowings	3 Months Ended
Long-Term Borrowings	Mar. 31, 2017
Debt Disclosure [Abstract]
Long-Term Borrowings	Long-Term Borrowings Subordinated Debentures Through its acquisitions of TIB Financial ("TIBB"), Capital Bank Corp. ("CBKN"), Green Bankshares ("GRNB"), Southern Community Financial ("SCMF" or "Southern Community"), and CommunityOne Bancorp ("COB" or "CommunityOne"), the Company assumed fourteen separate pooled offerings of trust preferred securities listed below. The Company is not considered the primary beneficiary of the trusts (variable interest entities), therefore the trusts are not consolidated in the Company’s Consolidated Financial Statements, but rather the subordinated debentures are presented as liabilities. The trusts consist of wholly-owned statutory trust subsidiaries for the purpose of issuing the trust preferred securities. The trusts used the proceeds from the issuance of trust preferred securities to acquire junior subordinated deferrable interest debentures of the Company. The trust preferred securities essentially mirror the debt securities, carrying a cumulative preferred dividend equal to the interest rate on the debt securities. The debt securities and the trust preferred securities each have 30 -year lives. The trust preferred securities and the debt securities are callable by the Company or the trust, at their respective option after a period of time, and at varying premiums and sooner in specific events, subject to prior approval by the Federal Reserve Board (“FRB”), if then required. Deferral of interest payments on the trust preferred securities is allowed for up to 60 months without being considered an event of default. The subordinated debentures are included in Tier 1 capital under the capital guidelines of the Dodd-Frank Act. The subordinated debentures as of March 31, 2017 and December 31, 2016 consisted of the following: (Dollars in thousands) Carrying Amount Date of Offering Face Amount March 31, 2017 December 31, 2016 Interest Rate as of March 31, 2017 Maturity Date July 31, 2001 $ 5,000 $ 4,034 $ 4,018 4.62 % (3 Month LIBOR + 358 bps) July 31, 2031 July 31, 2001 4,000 2,848 2,831 4.62 % (3 Month LIBOR + 358 bps) July 31, 2031 December 20, 2002 5,000 3,561 3,544 4.50 % (3 Month LIBOR + 335 bps) December 30, 2032 June 26, 2003 10,000 6,260 6,231 4.25 % (3 Month LIBOR + 310 bps) June 26, 2033 September 25, 2003 10,000 6,862 6,823 3.87 % (3 Month LIBOR + 285 bps) October 8, 2033 December 30, 2003 10,000 6,049 6,020 3.88 % (3 Month LIBOR + 285 bps) December 30, 2033 June 28, 2005 3,000 1,710 1,697 2.81 % (3 Month LIBOR + 168 bps) June 28, 2035 November 4, 2005 20,000 10,178 10,085 2.50 % (3 Month LIBOR + 137 bps) December 15, 2035 December 22, 2005 10,000 4,897 4,863 2.53 % (3 Month LIBOR + 140 bps) March 15, 2036 December 28, 2005 13,000 7,163 7,107 2.67 % (3 Month LIBOR + 154 bps) March 15, 2036 April 27, 2006 30,000 14,953 14,816 2.47 % (3 Month LIBOR + 132 bps) June 30, 2036 June 23, 2006 20,000 12,169 12,092 2.57 % (3 Month LIBOR + 155 bps) July 7, 2036 May 16, 2007 56,000 30,915 30,685 2.78 % (3 Month LIBOR + 165 bps) June 15, 2037 June 15, 2007 10,000 5,673 5,644 2.53 % (3 Month LIBOR + 143 bps) September 6, 2037 Total $ 206,000 $ 117,272 $ 116,456

Shareholders' Equity and Minimu

Shareholders' Equity and Minimum Regulatory Capital Requirements	3 Months Ended
	Mar. 31, 2017
Regulatory Capital Requirements [Abstract]
Shareholders' Equity and Minimum Regulatory Capital Requirements	Shareholders’ Equity and Minimum Regulatory Capital Requirements The Company (on a consolidated basis) and the Bank are subject to various regulatory capital requirements administered by federal and state banking agencies. Failure to meet minimum capital requirements results in certain discretionary and required actions by regulators that could have an effect on the Company’s operations. The regulations require the Company and the Bank to meet specific capital adequacy guidelines that involve quantitative measures of assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. The Company’s capital amounts and classifications are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. To be considered well capitalized or adequately capitalized as defined under the regulatory framework for prompt corrective action, the Bank must maintain minimum Tier 1 leverage, Tier 1 common, Tier 1 risk-based and Total Risk-based ratios. At March 31, 2017 and December 31, 2016 the Bank maintained capital ratios exceeding the requirement to be considered well capitalized. These minimum ratios along with the actual ratios for the Company and the Bank are presented in the following tables: (Dollars in thousands) Well Capitalized Adequately Capitalized Actual March 31, 2017 Amount Ratio Amount Ratio Amount Ratio Tier 1 Leverage Capital (to Average Assets) CBF Consolidated N/A N/A $ 383,662 ≥ 4.0% $ 1,115,279 11.6% Bank $ 478,803 ≥ 5.0% $ 383,042 ≥ 4.0% $ 1,022,161 10.7% Tier 1 Common Equity Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 373,798 ≥ 4.5% $ 1,011,778 12.2% Bank $ 539,229 ≥ 6.5% $ 373,312 ≥ 4.5% $ 1,022,161 12.3% Tier 1 Risk-based Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 498,397 ≥ 6.0% $ 1,115,279 13.4% Bank $ 663,666 ≥ 8.0% $ 497,749 ≥ 6.0% $ 1,022,161 12.3% Total Risk-based Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 664,529 ≥ 8.0% $ 1,159,635 14.0% Bank $ 829,582 ≥ 10.0% $ 663,666 ≥ 8.0% $ 1,066,518 12.9% (Dollars in thousands) Well Capitalized Requirement Adequately Capitalized Requirement Actual December 31, 2016 Amount Ratio Amount Ratio Amount Ratio Tier 1 Capital (to Average Assets) CBF Consolidated N/A N/A $ 360,513 ≥ 4.0% $ 1,101,743 12.2% Bank $ 450,006 ≥ 5.0% $ 360,005 ≥ 4.0% $ 1,010,409 11.2% Tier 1 Common Equity Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 367,521 ≥ 4.5% $ 1,012,831 12.4% Bank $ 529,887 ≥ 6.5% $ 366,845 ≥ 4.5% $ 1,010,409 12.4% Tier 1 Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 490,028 ≥ 6.0% $ 1,101,743 13.5% Bank $ 652,169 ≥ 8.0% $ 489,127 ≥ 6.0% $ 1,010,409 12.4% Total Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 653,371 ≥ 8.0% $ 1,145,351 14.0% Bank $ 815,211 ≥ 10.0% $ 652,169 ≥ 8.0% $ 1,054,016 12.9% As of March 31, 2017 and December 31, 2016 , the Company and the Bank met all capital requirements to which they were subject. Tier 1 Capital for the Company includes trust preferred securities to the extent allowable. Dividends that may be paid by a national bank are limited to that bank’s retained net profits for the preceding two years plus retained net profits up to the date of any dividend declaration in the current calendar year. The Company received dividends from the Bank totaling $4.2 million , $6.1 million , $5.7 million , and $64.2 million , on January 31, 2017, January 24, 2017, October 19, 2016 and June 1, 2016, respectively. The Company may use these dividends for general corporate purposes including acquisitions, or as a return of capital to shareholders through future share repurchases or dividends. In July 2013, the U.S. banking regulators adopted a final rule which implements the Basel III regulatory capital reforms from the Basel Committee on Banking Supervision, and certain changes required by the Dodd-Frank Act. The final rule established an integrated regulatory capital framework and introduces the “Standardized Approach” for risk-weighted assets, which replaces the Basel I risk-based guidance for determining risk-weighted assets as of January 1, 2015, the date the Company became subject to the new rules. Based on the Company's current capital composition and levels, the Company believes it is in compliance with the requirements as set forth in the final rules. The rules include new risk-based capital and leverage ratios, which will be phased in from 2015 to 2019, and refine the definition of what constitutes “capital” for purposes of calculating those ratios. The new minimum capital level requirements applicable to the Company and the Bank under the final rules are as follows: (i) a new common equity Tier 1 capital ratio of 4.5% ; (ii) a Tier 1 capital ratio of 6% (increased from 4% ); (iii) a total capital ratio of 8% (unchanged from previous rules); and (iv) a Tier 1 leverage ratio of 4% for all institutions. The final rules also establish a “capital conservation buffer” above the new regulatory minimum capital requirements. The capital conservation buffer will be phased-in over four years beginning on January 1, 2016, as follows: the maximum buffer will be 0.625% of risk-weighted assets for 2016, 1.25% for 2017, 1.875% for 2018, and 2.5% for 2019 and thereafter. This will result in the following minimum ratios beginning in 2019: (i) a common equity Tier 1 capital ratio of 7.0% , (ii) a Tier 1 capital ratio of 8.5% , and (iii) a total capital ratio of 10.5% . Under the final rules, institutions are subject to limitations on paying dividends, engaging in share repurchases, and paying discretionary bonuses if its capital level falls below the buffer amount. These limitations establish a maximum percentage of eligible retained income that could be utilized for such actions. As of March 31, 2017 , our capital buffer is 4.9% ; exceeding the 2.5% 2019 requirement. The final rules also contain revisions to the prompt corrective action framework, which is designed to place restrictions on insured depository institutions if their capital levels begin to show signs of weakness. Under the prompt corrective action requirements, which are designed to complement the capital conservation buffer, insured depository institutions are required to meet the following increased capital level requirements in order to qualify as “well capitalized:” (i) a new common equity Tier 1 capital ratio of 6.5% ; (ii) a Tier 1 capital ratio of 8% (increased from 6% ); (iii) a total capital ratio of 10% (unchanged from previous rules); and (iv) a Tier 1 leverage ratio of 5% (unchanged from previous rules). Dividend Program On April 20, 2017, the Company's board of directors approved a quarterly common dividend of $0.12 per share payable on May 19, 2017, to shareholders of record as of May 5, 2017. S hare Repurchases The Company’s board of directors has authorized stock repurchases of up to $400.0 million . Stock repurchases may be made from time to time, on the open market or in privately negotiated transactions. The approved stock repurchase program does not obligate the Company to repurchase any particular amount of shares, and the program may be extended, modified, suspended, or discontinued at any time. As of March 31, 2017 , the Company has repurchased a total of $312.4 million , or 12,739,763 common shares at an average price of $24.52 per share with $87.6 million remaining under the current board authorized stock repurchase program. The Company accounts for treasury stock using the cost method as a reduction of shareholders’ equity in the accompanying Consolidated Balance Sheets and Statements of Changes in Shareholders’ Equity.

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
Stock-Based Compensation	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation As of March 31, 2017 , the Company had two compensation plans, the 2010 Equity Incentive Plan (the "2010 Plan") and the 2013 Omnibus Compensation Plan (the “2013 Plan”) under which shares of its common stock are issuable in the form of stock options, stock appreciation rights, restricted stock, restricted stock units, stock awards, stock bonus awards, and other incentive awards. The 2010 Plan was replaced by the 2013 Plan and no further awards may be made pursuant to the 2010 Plan. The 2013 Plan was effective May 22, 2013 and expires on May 22, 2023 , the tenth anniversary of the effective date. The maximum number of shares of common stock of the Company that may be optioned or awarded under this plan is 2,639,000 shares. Awards under this plan may be made to any person selected by the Compensation Committee. The following table summarizes the components and classification of stock-based compensation expense for the three months ended March 31, 2017 and 2016 : (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Stock options $ 24 $ 9 Restricted stock 876 308 Total stock-based compensation expense $ 900 $ 317 The tax benefit related to stock-based compensation expense arising from restricted stock awards and non-qualified stock options was $0.5 million and $0.1 million for the three months ended March 31, 2017 and 2016 , respectively. Stock Options Under the 2010 Plan and 2013 Plan, the exercise price for common stock must equal at least 100% of the fair market value of the stock on the day an option is granted. The exercise price under an incentive stock option granted to a person owning stock representing more than 10% of the common stock must equal at least 110% of the fair market value at the date of grant, and such option is not exercisable after five years from the date the incentive stock option was granted. The Board of Directors may, at its discretion, provide that an option not be exercised in whole or in part for any period or periods of time as specified in the option agreements. Stock options have an expiration of ten years from the date it is granted. Under these plans, 56,927 options were exercised and 15,623 stock options were granted during the three months ended March 31, 2017 . The fair value of each option is estimated as of the date of the grant using the Black-Scholes Option Pricing Model. This model requires the input of subjective assumptions that will usually have a significant impact on the fair value estimate. The dividend yield assumption is consistent with management expectations of dividend distributions based upon the Company’s business plan at the date of grant. The risk-free interest rate was developed using the U.S. Treasury yield curve for a period equal to the expected life of the options on the grant date. The expected option life for the current period grants was estimated using the vesting period, the term of the option and estimates of future exercise behavior patterns. The expected volatility assumption was based on the historical volatility of the Company's stock price. The following table summarizes the weighted average assumptions used to compute the grant-date fair value of options granted during the three months ended March 31, 2017 : Three Months Ended March 31, 2017 Dividend yield 1.21% Risk-free interest rate 2.13% Expected option life 6.00 years Volatility 21.94% Weighted average grant-date fair value of options granted $8.61 ASC 718 requires the recognition of stock-based compensation expense for the number of awards that are ultimately expected to vest. During the three months ended March 31, 2017 and 2016 , stock based compensation expense was recorded based upon assumptions that the Company would experience no forfeitures. This assumption of forfeitures will be reassessed in subsequent periods based on historical forfeiture rates and may change based on new facts and circumstances. Any changes in assumptions will be accounted for prospectively in the period of change. A summary of the stock option activity for the three months ended March 31, 2017 and 2016 is as follows: Three Months Ended March 31, 2017 March 31, 2016 (Shares in thousands) Shares Weighted Shares Weighted Balance, January 1, 3,180 $ 20.86 3,075 $ 20.12 Granted 15 39.55 30 30.54 Exercised (57 ) 21.06 (10 ) 18.00 Canceled, expired or forfeited — — — — Balance, March 31, 3,138 $ 20.94 3,095 $ 20.23 At March 31, 2017 , the weighted average remaining contractual life for outstanding stock options was approximately 3.63 years and the aggregate intrinsic values was $68.2 million for stock options outstanding and exercisable. The intrinsic value for stock options is calculated as the difference between the exercise price of the underlying awards and the market price of the Company’s common stock as of the reporting date. Options outstanding at March 31, 2017 were as follows: (Shares in thousands) Outstanding Options Exercisable Options Range of Exercise Prices Shares Weighted Average Remaining Contractual Life Weighted Average Exercise Price Per Share Shares Weighted Average Exercise Price Per Share $18.00 145 6.14 years $ 18.00 145 $ 18.00 $18.01 - $20.00 2,819 3.23 years 20.00 2,819 20.00 $20.01 - $1,095.00 174 7.91 years 37.63 117 38.50 $18.00 - $2,026.00 3,138 3.63 years $ 20.94 3,081 $ 20.67 Restricted Stock Restricted stock provides the grantee with voting, dividend and anti-dilution rights equivalent to common shareholders, but is restricted from transfer until vested, at which time all restrictions are removed. The restricted stock vests ratably over a three -year period subject to continued employment with the company. The value of the restricted stock is being amortized on a straight-line basis over the implied service periods. There were 165,063 restricted stock awards granted under the 2013 Plan during the three months ended March 31, 2017 . The following table summarizes unvested restricted stock activity for the three months ended March 31, 2017 and 2016 : Three Months Ended March 31, 2017 March 31, 2016 (Shares in thousands) Shares Weighted Shares Weighted Balance, January 1, 197 $ 30.10 — $ — Granted 165 39.56 185 30.54 Vested or released (61 ) 30.54 — — Canceled, expired or forfeited — — — — Balance, March 31 301 $ 35.51 185 $ 30.54

Income Taxes

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes A reconciliation of income tax computed at applicable Federal statutory income tax rates to total income tax expense reported for the three months ended March 31, 2017 and 2016 is as follows: (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Income before income taxes $ 31,873 $ 15,620 Income taxes computed at Federal statutory tax rate 11,156 5,467 Effect of: State taxes (net of federal benefit) 801 470 State statutory rate change — 13 Tax-exempt interest income, net (334 ) (170 ) Other, net (633 ) — Total income tax expense $ 10,990 $ 5,780 The Company uses an estimated annual effective tax rate method of computing its interim tax provision. The effective tax rate is based on forecasted annual pre-tax income, permanent differences and statutory tax rates. For the three months ended March 31, 2017 and March 31, 2016 , the effective income tax rates were 34% and 37% , respectively. The change in effective income tax rate was mainly due to lower state income taxes, higher tax exempt interest income and other favorable adjustments. The Company and its subsidiaries are subject to U.S. federal income tax, as well as income tax of the states of Florida, New York, South Carolina, North Carolina, and Tennessee. The net deferred tax assets as of March 31, 2017 and December 31, 2016 were $146.7 million and $150.3 million , respectively. A valuation allowance related to deferred tax assets is required when it is considered more likely than not that all or part of the benefit related to such assets will not be realized. In assessing the need for a valuation allowance, the Company considered both positive and negative evidence in concluding that no valuation allowance was necessary at March 31, 2017 and December 31, 2016 . At March 31, 2017 and December 31, 2016 , the Company had $471.6 million and $478.6 million of gross federal net operating loss carry-forwards, respectively, which begin to expire after 2028 and are subject to annual cumulative limitation of $27.8 million for tax year 2017. In addition, the Company had $44.3 million of realized built-in-loss carry-forwards expected to be utilized. At March 31, 2017 and December 31, 2016 the company had $506.0 million and $507.0 million of gross state net operating loss carry-forwards expected to be utilized, respectively. At March 31, 2017 and December 31, 2016 , the Company had no unrecognized tax benefits and no material amounts recorded for uncertain tax positions.

Fair Value

Fair Value	3 Months Ended
Fair Value	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value	Fair Value FASB guidance on fair value measurements defines fair value, establishes a framework for measuring fair value, and requires fair value disclosures for certain assets and liabilities measured at fair value on a recurring and non-recurring basis. This guidance defines fair value as the exchange price that would be received for an asset or paid to transfer a liability in an orderly transaction between market participants in the principal or most advantageous market for the asset or liability. This guidance establishes a fair value hierarchy for disclosure of fair value measurements to maximize the use of observable inputs, that is, inputs that reflect the assumptions market participants would use in pricing an asset or liability based on market data obtained from sources independent of the reporting entity. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity can access as of the measurement date. Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. Cash & cash equivalents Cash and cash equivalents include cash on hand and highly-liquid items with an original maturity of three months or less. Accordingly, the carrying amount of such instruments is considered to be a reasonable estimate of fair value. Derivative financial instruments Interest rate swaps are valued by a third party, using models that primarily use market observable inputs, such as yield curves, and are validated by comparison with valuations provided by the respective counterparties. The credit risk associated with derivative financial instruments that are subject to master netting agreements is measured on a net basis by counterparty portfolio. Forward loan sales agreements are based upon the amounts required to settle the contracts. Fair values for commitments to originate loans held for sale are based on fees currently charged to enter into similar agreements. Fair values for fixed-rate commitments consider the difference between current levels of interest rates and the committed rates. Valuation of Investment Securities The fair values of available-for-sale, held-to-maturity and trading securities are determined by: 1) obtaining quoted prices on nationally recognized securities exchanges when available (Level 1 inputs); 2) matrix pricing, which is a mathematical technique widely used in the financial markets to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs); and 3) for certain other debt securities that are not actively traded, custom discounted cash flow modeling (Level 3 inputs). As of March 31, 2017 , the Bank held industrial revenue bonds, which are floating rate issues. Since there is no active secondary market for the trading of the bonds, the Company has developed a model to estimate fair value. This model determines an appropriate discount rate for the bonds based on current market rates for liquid corporate bonds with an equivalent credit rating plus an estimated illiquidity factor, and calculates the present value of expected future cash flows using this discount rate. Mortgage Loans Held for Sale Mortgage loans held for sale are carried at the lower of cost or estimated fair value. The fair values of mortgage loans held for sale are based on commitments on hand from investors within the secondary market for loans with similar characteristics. As such, the fair value adjustment for mortgage loans held for sale is classified as nonrecurring Level 2. Valuation of Impaired Loans and Other Real Estate Owned The fair value of collateral dependent impaired loans with specific allocations of the allowance for loan and lease losses and other real estate owned is generally based on recent real estate appraisals and other available observable market information. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. The Company generally uses independent external appraisers in this process who routinely make adjustments to adjust for differences between the comparable sales and income data available. Such adjustments are typically significant and result in a Level 3 classification of the inputs for determining fair value. The Company’s policy is to update appraisals, at a minimum, annually for classified assets, which include collateral dependent loans and OREO. The Company considers appraisals dated within the past 12 months to be current and do not typically make adjustments to such appraisals. In the Company’s process for reviewing third-party prepared appraisals, any differences of opinion on values, assumptions or adjustments to comparable sales data are typically reconciled directly with the independent appraiser prior to acceptance of the final appraisal. Mortgage Servicing Rights As of March 31, 2017 , the fair value of the Company's Level 3 mortgage servicing rights (“MSR”) was $3.4 million , none of which are currently impaired and therefore are carried at amortized cost. The assumptions used include the fee per loan, the cost to service, the expected loan prepayment rate, and the discount rate. In determining the fair value of the existing MSR, the Company reviews the key assumptions, analyzes pricing in the market for comparable MSR, and uses a third party provider to independently calculate the fair value of its MSR. Sensitivity to Changes in Significant Unobservable Inputs As discussed above, as of March 31, 2017 , the Company owns industrial revenue bonds, which require recurring fair value estimates categorized within Level 3 of the fair value hierarchy. The significant unobservable inputs used in the fair value measurement of these securities are incorporated in the discounted cash flow modeling valuation. Rates utilized in the modeling of these securities are estimated based upon a variety of factors including the market yields of other non-investment grade corporate debt. Significant changes in any inputs in isolation would result in significantly different fair value estimates. Assets and Liabilities Measured on a Recurring Basis Assets and liabilities measured at fair value on a recurring basis as of March 31, 2017 are summarized below: (Dollars in thousands) Fair Value Measurement Using: Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Trading securities $ 4,150 $ — $ 4,150 $ — Available-for-sale securities: Mortgage-backed securities—residential $ 1,079,096 $ — $ 1,079,096 $ — Industrial revenue bonds 3,136 — — 3,136 Corporate bonds 61,102 — 61,102 — State and political subdivisions—tax exempt 11,162 — 11,162 — Available-for-sale securities $ 1,154,496 $ — $ 1,151,360 $ 3,136 Gross asset value of derivatives $ 1,397 $ — $ 1,397 $ — Liabilities Gross liability value of derivatives $ 2,372 $ — $ 2,372 $ — There were no transfers of assets and liabilities between levels of the fair value hierarchy during the three months ended March 31, 2017 . Assets and liabilities measured at fair value on a recurring basis as of December 31, 2016 are summarized below: (Dollars in thousands) Fair Value Measurement Using: Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Trading securities $ 3,791 $ — $ 3,791 $ — Available-for-sale securities: Mortgage-backed securities-residential $ 868,922 $ — $ 868,922 $ — State and political subdivisions - tax exempt 11,077 — 11,077 — Industrial revenue bonds 3,298 — — 3,298 Corporate bonds 28,953 — 28,953 — Available-for-sale securities $ 912,250 $ — $ 908,952 $ 3,298 Gross asset value of derivatives $ 1,078 $ — $ 1,078 $ — Liabilities Gross liability value of derivatives $ 1,354 $ — $ 1,354 $ — There were no transfers of assets and liabilities between levels of the fair value hierarchy during the year ended December 31, 2016 . The table below presents the activity and income statement classifications of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended and held at March 31, 2017 : (Dollars in thousands) Fair Value Measurement Using Significant Unobservable Inputs (Level 3) Industrial Revenue Bonds Beginning balance, January 1, 2017 $ 3,298 Principal reduction (170 ) Included in other comprehensive income 8 Ending balance, March 31, 2017 $ 3,136 (Dollars in thousands) Fair Value Measurement Using Significant Unobservable Inputs (Level 3) Industrial Revenue Bonds Beginning balance, January 1, 2016 $ 3,437 Principal reduction (170 ) Included in other comprehensive income (18 ) Ending balance, March 31, 2016 $ 3,249 Quantitative Information about Recurring Level 3 Fair Value Measurements (Dollars in thousands) Fair Value at Valuation Technique Significant Range Industrial revenue bonds $ 3,136 Discounted cash flow Discount rate 3.21% - 3.24% Illiquidity factor 0.5% (Dollars in thousands) Fair Value at December 31, 2016 Valuation Technique Significant Unobservable Input Range Industrial revenue bonds $ 3,298 Discounted cash flow Discount rate 3.31% - 3.35% Illiquidity factor 0.5% Assets and Liabilities Measured on a Nonrecurring Basis Assets and liabilities measured at fair value on a nonrecurring basis as of March 31, 2017 are summarized below: (Dollars in thousands) Fair Value Measurement Using: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Other real estate owned $ — $ — $ 42,001 Other repossessed assets 206 — — Impaired loans — — 1,107 Other real estate owned measured at fair value as of March 31, 2017 had a gross amount of $50.7 million , less valuation allowances totaling $8.7 million and is made up of $37.1 million commercial properties and $4.9 million residential properties. Impairment charges resulting from the non-recurring changes in the fair value of OREO included in the consolidated statement of income for the three months ended March 31, 2017 was $0.2 million . Other repossessed assets are primarily comprised of repossessed vehicles and equipment and are measured at fair value as of the date of repossession. Impaired loans are primarily comprised of residential properties and are measured at fair value as of March 31, 2017 . Assets and liabilities measured at fair value on a nonrecurring basis as of December 31, 2016 are summarized below: (Dollars in thousands) Fair Value Measurement Using: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Other real estate owned $ — $ — $ 41,168 Other repossessed assets 163 — — Impaired loans — — 1,420 Other real estate owned measured at fair value as of December 31, 2016 had a gross amount of $50.0 million , less valuation allowances totaling $8.9 million and is made up of $35.5 million commercial properties and $5.7 million residential properties. Impairment charges resulting from the non-recurring changes in the fair value of OREO included in the consolidated statement of income for the three months ended December 31, 2016 was $0.7 million . Other repossessed assets are primarily comprised of repossessed vehicles and equipment and are measured at fair value as of the date of repossession. Impaired loans are primarily comprised of residential properties and are measured at fair value as of December 31, 2016 . Quantitative Information about Nonrecurring Level 3 Fair Value Measurements (Dollars in thousands) Fair Value at Valuation Technique Significant Unobservable Input Weighted Average Other real estate owned $ 42,001 Fair value of property None —% Impaired loans 1,107 Fair value of collateral None —% (Dollars in thousands) Fair Value at December 31, 2016 Valuation Technique Significant Unobservable Input Weighted Average Other real estate owned $ 41,168 Fair value of property None —% Impaired loans 1,420 Fair value of collateral None —% Carrying amount and estimated fair values of financial instruments were as follows: (Dollars in thousands) Fair Value Measurement March 31, 2017 Carrying Value Estimated Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 160,547 $ 160,547 $ 160,547 $ — $ — Trading securities 4,150 4,150 — 4,150 — Investment securities available-for-sale 1,154,496 1,154,496 — 1,151,360 3,136 Investment securities held-to-maturity 446,020 445,696 — 445,696 — Loans, net 7,468,064 7,478,239 — 4,980 7,473,259 Other earning assets (1) 29,796 29,796 — — 29,796 Gross asset value of derivatives 1,397 1,397 — 1,397 — Total financial assets $ 9,264,470 $ 9,274,321 $ 160,547 $ 1,607,583 $ 7,506,191 Financial Liabilities Non-contractual deposits $ 5,958,134 $ 5,958,134 $ — $ 5,958,134 $ — Contractual deposits 2,134,473 2,118,049 — 2,118,049 — Federal Home Loan Bank advances 490,650 489,540 — 489,540 — Short-term borrowings 21,125 21,122 — 21,122 — Subordinated debentures 117,272 116,645 — — 116,645 Gross liability value of derivatives 2,372 2,372 — 2,372 — Total financial liabilities $ 8,724,026 $ 8,705,862 $ — $ 8,589,217 $ 116,645 (1) Includes Federal Home Loan Bank stock. (Dollars in thousands) Fair Value Measurement December 31, 2016 Carrying Value Estimated Fair Value Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 309,055 $ 309,055 $ 309,055 $ — $ — Trading securities 3,791 3,791 — 3,791 — Investment securities available-for-sale 912,250 912,250 — 908,952 3,298 Investment securities held-to-maturity 463,959 460,911 — 460,911 — Loans, net 7,363,127 7,395,128 — 12,874 7,382,254 Other earning assets (1) 32,050 32,050 — — 32,050 Gross asset value of derivatives 1,078 1,078 — 1,078 — Total financial assets $ 9,085,310 $ 9,114,263 $ 309,055 $ 1,387,606 $ 7,417,602 Financial Liabilities Non-contractual deposits $ 5,743,316 $ 5,743,316 $ — $ 5,743,316 $ — Contractual deposits 2,137,312 2,121,519 — 2,121,519 — Federal Home Loan Bank advances 545,701 546,023 — 546,023 — Short-term borrowings 19,157 19,154 — 19,154 — Subordinated debentures 116,456 114,593 — — 114,593 Gross liability value of derivatives 1,354 1,354 — 1,354 — Total financial liabilities $ 8,563,296 $ 8,545,959 $ — $ 8,431,366 $ 114,593 (1) Includes Federal Home Loan Bank stock. The methods and assumptions used to estimate fair value are described as follows: Carrying amount is the estimated fair value for cash and cash equivalents, derivatives, noncontractual demand deposits and certain short-term borrowings. As it is not practicable to determine the fair value of Federal Home Loan Bank stock due to restrictions placed on transferability, the estimated fair value is equal to their carrying amount. Security fair values are based on market prices or dealer quotes and, if no such information is available, on the rate and term of the security and information about the issuer including estimates of discounted cash flows when necessary. For fixed rate loans or contractual deposits and for variable rate loans or deposits with infrequent repricing or repricing limits, fair value is based on discounted cash flows using current market rates applied to the estimated life, adjusted for the allowance for loan and lease losses. Fair values for impaired loans are estimated using discounted cash flow analysis or underlying collateral values. Fair value of loans does not necessarily represent exit price. Fair value of long-term debt is based on current rates for similar financing. The fair value of off-balance sheet items that include commitments to extend credit to fund commercial, consumer, real estate construction and real estate-mortgage loans and to fund standby letters of credit is considered nominal.

Derivative and Hedging Activiti

Derivative and Hedging Activities	3 Months Ended
Derivative and Hedging Activities	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative and Hedging Activities	Derivative and Hedging Activities The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. The Company may enter into derivative contracts that are intended to economically hedge certain of its risks, even though hedge accounting does not apply or the Company elects not to apply hedge accounting. During 2015, the company entered into LIBOR-based interest rate swaps with the objective of limiting the variability of interest payment cash flows resulting from changes in the benchmark interest rate LIBOR. These interest rate swaps are designated as cash flow hedges involving the receipt of fixed-rate amounts from a counterparty in exchange for the Company making variable-rate payments over the life of the agreements without exchange of the underlying notional amount. The effective portion of changes in the fair value of the derivatives is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. Any ineffective portion of a financial instrument’s change in fair value is immediately recognized in earnings. During the next twelve months, the Company estimates that an additional $0.7 million will be reclassified as a decrease to interest income from amounts reported in accumulated comprehensive income. During the three months ended March 31, 2017 , no derivative position designated as cash flow hedges were discontinued and none of the gains and losses reported in other comprehensive income were reclassified into earnings as a result of discontinuance of cash flow hedges. During the second quarter of 2016, the company implemented an interest rate swap program to allow customers to convert variable rate loans to fixed rates. The interest rate swaps are simultaneously offset by interest rate swaps that the Company executes with its derivative counterparties. The changes in the fair value of the swaps offset each other, except for any differences in the credit risk of the counterparties. None of these interest rate swaps are designated or qualify as hedging relationships. As the interest rate swaps associated with this program do not meet hedge accounting requirements, changes in fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. The Company recorded $0.2 million of customer swap fees in non-interest income for the three months ended March 31, 2017 . The Company also enters into forward loan sales contracts, which are derived from loans held for sale, or in the Company’s pipeline, to enable those borrowers to manage their exposure to interest rate fluctuations. The forward loan sales derivative contracts are not designated as hedging instruments and all changes in fair value are recognized in non-interest income or non-interest expense during the period of change. For the three months ended March 31, 2017 , the Company recorded $103 thousand in non-interest income and $114 thousand in non-interest expense as a result of changes in fair value of derivatives. For the three months ended March 31, 2016 , the company recorded $24 thousand in non-interest income and $1 thousand in non-interest expense. The Company’s derivative instrument contracts at fair value as well as their classification on the Company's Consolidated Balance Sheet is presented below: (Dollars in thousands) March 31, 2017 December 31, 2016 Number of instruments Balance Sheet Location Fair Value Notional Fair Value Notional Asset derivatives Derivatives designated as hedging instruments Interest rate swap — Other assets $ — $ — $ 130 $ 120,000 Derivatives not designated as hedging instruments Forward loan sales contracts 87 Other assets 116 15,739 13 4,205 Interest rate swap 7 Other assets 1,281 39,588 935 24,947 Total asset derivatives $ 1,397 $ 55,327 $ 1,078 $ 149,152 Liability derivatives Derivatives designated as hedging instruments Interest rate swap 4 Other liabilities $ 1,131 $ 235,000 $ 378 $ 115,000 Derivatives not designated as hedging instruments Forward loan sales contracts 1 Other liabilities 1 214 114 11,870 Interest rate swap 7 Other liabilities 1,240 39,855 862 24,947 Total liability derivatives $ 2,372 $ 275,069 $ 1,354 $ 151,817 The table below presents the effect of the Company's derivative financial instruments on the Consolidated Statements of Income for the three months ended March 31, 2017 : (Dollars in thousands) Three Months Ended March 31, 2017 Derivatives in Cash Flow Hedging Relationship Amount of Loss Recognized in Accumulated OCI on Derivative (Effective Portion) Location of Gain Reclassified from Accumulated OCI into Income (Effective Portion) Amount of Gain Reclassified from Accumulated OCI on Derivative (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion) Amount Recognized in Income on Derivative (Ineffective Portion) Interest rate swap $ (451 ) Interest income $ 432 N/A $ — The table below presents a gross presentation, the effects of offsetting, and a net presentation of the Company's derivatives as of March 31, 2017 : Gross Amounts Not Offset in the Balance Sheets (Dollars in thousands) Gross Amount of Recognized Assets Gross Amount Offset in the Balance Sheets Net Amount of Assets Presented in the Balance Sheets Financial Instruments Cash Collateral Net Amount Offsetting of derivative assets: Interest rate swap $ 1,281 $ — $ 1,281 $ 635 $ 364 $ 282 Total $ 1,281 $ — $ 1,281 $ 635 $ 364 $ 282 Offsetting of derivative liabilities: Interest rate swap 2,371 — 2,371 635 792 $ 944 Total $ 2,371 $ — $ 2,371 $ 635 $ 792 $ 944 The amount of collateral received and posted disclosed in the table above represents the offset of the assets and liabilities as of March 31, 2017 . The actual cash collateral received and posted amounted to $0.7 million and $0.8 million , respectively. The Company has agreements with certain of its derivative counterparties that contain a provision where if the Company defaults on any of its indebtedness or fails to maintain its status as a well-capitalized institution, then the Company could also be declared in default on its derivative obligations and could be required to terminate its derivative positions with the counterparty and settle the termination value of derivatives in a liability position. As of March 31, 2017 , there were eleven derivatives in a $2.4 million net liability position, which includes accrued interest and excludes nonperformance risk, related to these agreements. The Company is exposed to credit-related losses in the event of nonperformance by the counterparties to these agreements. The Company controls the credit risk of its financial contracts through credit approvals, limits and monitoring procedures and agreements that specify collateral levels to be maintained by the Company and the counterparties. The company has minimum collateral posting thresholds with certain derivative counterparties, and has posted $0.8 million of cash collateral against its obligations under these agreements as of March 31, 2017 .

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
Basis of Presentation (Policies)	Mar. 31, 2017
Accounting Policies [Abstract]
Nature of Operations and Principles of Consolidation	Nature of Operations and Principles of Consolidation Capital Bank Financial Corp. (“CBF” or the “Company”; formerly known as North American Financial Holdings, Inc.) is a bank holding company incorporated in late 2009 in Delaware and headquartered in North Carolina whose business is conducted primarily through Capital Bank Corporation (“Capital Bank Corporation” or the “Bank”). The Company was incorporated with the goal of creating a regional banking franchise in the southeastern region of the United States through organic growth and acquisitions of other banks, including failed, underperforming and undercapitalized banks. CBF has raised $955.6 million to make acquisitions through a series of private placements and an initial public offering of its common stock. Since inception, CBF has acquired eight depository institutions, including the assets and certain deposits from failed banks. CBF has a total of 193 full service banking offices located in Florida, North and South Carolina, Tennessee and Virginia. During the three months ended March 31, 2017 , the Company closed and consolidated three branches in conjunction with the merger of CommunityOne. The Company expects to close and consolidate an additional fifteen branches and incur an additional charge of approximately $4.0 million during 2017. As such, the Company transfered $6.2 million from fixed assets to bank properties held for sale during the three months ended March 31, 2017 . The accompanying unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and Regulation S-X. Accordingly, they do not include all of the information and disclosures required by U.S. GAAP for complete financial statement presentation. In the opinion of management, all adjustments consisting of normal recurring accruals and disclosures considered necessary for a fair interim presentation have been included. All significant inter-company accounts and transactions have been eliminated in consolidation. For further information, refer to the Company’s Consolidated Financial Statements and notes thereto included in the Company’s annual report on Form 10-K for the fiscal year ended December 31, 2016.
Use of Estimates and Assumptions	Use of Estimates and Assumptions To prepare financial statements in conformity with U.S. GAAP, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as presented in the financial statements. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In March 2017, the Financial Accounting Standard Board (the “FASB”) Accounting Standards Update ("ASU") 2017-07, "Compensation - Retirement Benefits (Topic 715)". The amendments in this update require that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost as defined in paragraphs 715-30-35-4 and 715-60-35-9 are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. If a separate line item or items are used to present the other components of net benefit cost, that line item or items must be appropriately described. If a separate line item or items are not used, the line item or items used in the income statement to present the other components of net benefit cost must be disclosed. The amendments in this update also allow only the service cost component to be eligible for capitalization when applicable (for example, as a cost of internally manufactured inventory or a self-constructed asset). The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2017. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other (Topic 350)". The amendments in this update aim to simplify the subsequent measurement of goodwill. Under these amendments, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The FASB also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment. An entity is required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets and still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2019. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In January 2017, the FASB issued ASU 2017-01, "Business Combinations (Topic 805)". The amendments in this update provide a screen to determine when a set is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated. The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The amendments in this update should be applied prospectively on or after the effective date. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In May 2016, the FASB issued ASU 2016-12, "Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients". The amendments in this Update represent minor corrections or improvements to narrow aspects of Topic 606, as amended by ASU No. 2014-09, and do not change the core principle of the guidance in Topic 606. The effective date and transition requirements for the amendments in this Update are the same as the effective date and transition requirements for Topic 606 (and any other Topic amended by Update 2014-09), which is not yet effective. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows—Credit Losses (Topic 230)". The amendments in this update provide guidance on the following eight specific cash flow issues: (1) Debt prepayment or debt extinguishment costs; (2) Settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing; (3) Contingent consideration payments made after a business combination; (4) Proceeds from the settlement of insurance claims; (5) Proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; (6) Distributions received from equity method investees; (7) Beneficial interests in securitization transactions; (8) Separately identifiable cash flows and application of the predominance principle. The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments—Credit Losses (Topic 326)". Assets Measured at Amortized Cost—The main objective of this update is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments in this update replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates and affects loans, debt securities, trade receivables, net investments in leases, off-balance-sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. For public business entities that are U.S. Securities and Exchange Commission (SEC) filers, the amendments in this update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In March 2016, the FASB issued ASU 2016-9, "Compensation—Stock compensation (Topic 718)". Improvements to employee share-based payment accounting" which objective is the simplification through the identification, evaluation, and improvement of areas of generally accepted accounting principles (GAAP) for which cost and complexity can be reduced while maintaining or improving the usefulness of the information provided to users of financial statements. The areas for simplification involve several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Some of the areas for simplification apply only to nonpublic entities. As permitted, we early adopted this ASU during the fourth quarter of 2016. As allowed by the ASU, the Company's adoption was prospective, therefore, prior periods have not been adjusted. The adoption did not have a material impact on the Company's consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-08, “Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net)”. The amendments in this update will clarify the implementation guidance on principal versus agent considerations. Topic 606 requires an entity to determine whether the nature of its promise is to provide that good or service to the customer (that is, the entity is a principal) or to arrange for the good or service to be provided to the customer by the other party (that is, the entity is an agent). This determination is based upon whether the entity controls the good or the service before it is transferred to the customer. Topic 606 includes indicators to assist in this evaluation. The effective date and transition requirements for the amendments in this update are the same as the effective date and transition requirements for Topic 606 (and any other Topic amended by update 2014-09 listed below), which is not yet effective. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. In March 2016, the FASB issued ASU 2016-7, "Investments—Equity Method and Joint Ventures (Topic 323)". The amendments in this update eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. Therefore, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments in this update require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. The amendments in this update are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The amendments should be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. Earlier application is permitted. The adoption did not have a material impact on the Company's consolidated financial statements. In March 2016, the FASB issued ASU 2016-6, "Derivatives and Hedging (Topic 815): Contingent Put and Call Options in Debt Instruments". The amendments in this update clarify the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. An entity performing the assessment under the amendments in this update is required to assess the embedded call (put) options solely in accordance with the four-step decision sequence. For public business entities, the amendments in this update are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. The adoption did not have a material impact on the Company's consolidated financial statements. In January 2016, the FASB issued ASU 2016-2, "Leases (Topic 842)" which increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. To meet that objective, the FASB is amending the FASB Accounting Standards Codification and creating Topic 842, Leases. This update, along with IFRS 16, Leases, are the results of the FASB’s and the International Accounting Standards Board’s (IASB’s) efforts to meet that objective and improve financial reporting. The FASB and IASB decided to not fundamentally change lessor accounting with the amendments in this update. However, some changes have been made to lessor accounting to conform and align that guidance with the lessee guidance and other areas within generally accepted accounting principles (GAAP), such as Topic 606, Revenue from Contracts with Customers. The main difference between previous GAAP and Topic 842 is the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows. For public business entities, the amendments in ASU 2016-2 are effective for fiscal years beginning after December 15, 2018. In January 2016, the FASB issued ASU 2016-1, "Financial instruments—Overall (Subtopic 825-10)" which requires all equity investments to be measured at fair value with changes in the fair value recognized through net income (other than those accounted for under equity method of accounting or those that result in consolidation of the investee). The amendments in this update also require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. In addition, the amendments in this update eliminate the requirement to disclose the fair value of financial instruments measured at amortized cost for entities that are not public business entities and the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet for public business entities. For public business entities, the amendments in ASU 2016-1 are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of ASU 2016-1 is not expected to have a material impact on the Company's consolidated financial position, results of operations and cash flows. In May 2014, the FASB issued ASU 2014-9, "Revenue from Contracts with Customers (Topic 606)". The core principle of Topic 606 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity should (1) identify the contract(s) with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) the entity satisfies the performance obligation. In August 2015, the FASB issued ASU 2015-14, "Revenue from contracts with customers (Topic 606) - Deferral of the Effective Date". The amendments in ASU 2015-14 establish December 15, 2017 as the effective date of the information related to ASU 2014-09, “Revenue from Contracts with Customers (Topic 606)”. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows.
Earnings Per Common Share	Earnings Per Common Share Basic earnings per share is computed as net income attributable to common shareholders divided by the weighted average number of common shares outstanding during the period. Diluted earnings per share include the dilutive effect of additional potential common shares issuable under stock options and unvested restricted shares computed using the treasury stock method.
Fair Value	FASB guidance on fair value measurements defines fair value, establishes a framework for measuring fair value, and requires fair value disclosures for certain assets and liabilities measured at fair value on a recurring and non-recurring basis. This guidance defines fair value as the exchange price that would be received for an asset or paid to transfer a liability in an orderly transaction between market participants in the principal or most advantageous market for the asset or liability. This guidance establishes a fair value hierarchy for disclosure of fair value measurements to maximize the use of observable inputs, that is, inputs that reflect the assumptions market participants would use in pricing an asset or liability based on market data obtained from sources independent of the reporting entity. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity can access as of the measurement date. Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. Cash & cash equivalents Cash and cash equivalents include cash on hand and highly-liquid items with an original maturity of three months or less. Accordingly, the carrying amount of such instruments is considered to be a reasonable estimate of fair value. Derivative financial instruments Interest rate swaps are valued by a third party, using models that primarily use market observable inputs, such as yield curves, and are validated by comparison with valuations provided by the respective counterparties. The credit risk associated with derivative financial instruments that are subject to master netting agreements is measured on a net basis by counterparty portfolio. Forward loan sales agreements are based upon the amounts required to settle the contracts. Fair values for commitments to originate loans held for sale are based on fees currently charged to enter into similar agreements. Fair values for fixed-rate commitments consider the difference between current levels of interest rates and the committed rates. Valuation of Investment Securities The fair values of available-for-sale, held-to-maturity and trading securities are determined by: 1) obtaining quoted prices on nationally recognized securities exchanges when available (Level 1 inputs); 2) matrix pricing, which is a mathematical technique widely used in the financial markets to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs); and 3) for certain other debt securities that are not actively traded, custom discounted cash flow modeling (Level 3 inputs). As of March 31, 2017 , the Bank held industrial revenue bonds, which are floating rate issues. Since there is no active secondary market for the trading of the bonds, the Company has developed a model to estimate fair value. This model determines an appropriate discount rate for the bonds based on current market rates for liquid corporate bonds with an equivalent credit rating plus an estimated illiquidity factor, and calculates the present value of expected future cash flows using this discount rate. Mortgage Loans Held for Sale Mortgage loans held for sale are carried at the lower of cost or estimated fair value. The fair values of mortgage loans held for sale are based on commitments on hand from investors within the secondary market for loans with similar characteristics. As such, the fair value adjustment for mortgage loans held for sale is classified as nonrecurring Level 2. Valuation of Impaired Loans and Other Real Estate Owned The fair value of collateral dependent impaired loans with specific allocations of the allowance for loan and lease losses and other real estate owned is generally based on recent real estate appraisals and other available observable market information. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. The Company generally uses independent external appraisers in this process who routinely make adjustments to adjust for differences between the comparable sales and income data available. Such adjustments are typically significant and result in a Level 3 classification of the inputs for determining fair value. The Company’s policy is to update appraisals, at a minimum, annually for classified assets, which include collateral dependent loans and OREO. The Company considers appraisals dated within the past 12 months to be current and do not typically make adjustments to such appraisals. In the Company’s process for reviewing third-party prepared appraisals, any differences of opinion on values, assumptions or adjustments to comparable sales data are typically reconciled directly with the independent appraiser prior to acceptance of the final appraisal. Mortgage Servicing Rights As of March 31, 2017 , the fair value of the Company's Level 3 mortgage servicing rights (“MSR”) was $3.4 million , none of which are currently impaired and therefore are carried at amortized cost. The assumptions used include the fee per loan, the cost to service, the expected loan prepayment rate, and the discount rate. In determining the fair value of the existing MSR, the Company reviews the key assumptions, analyzes pricing in the market for comparable MSR, and uses a third party provider to independently calculate the fair value of its MSR. Sensitivity to Changes in Significant Unobservable Inputs As discussed above, as of March 31, 2017 , the Company owns industrial revenue bonds, which require recurring fair value estimates categorized within Level 3 of the fair value hierarchy. The significant unobservable inputs used in the fair value measurement of these securities are incorporated in the discounted cash flow modeling valuation. Rates utilized in the modeling of these securities are estimated based upon a variety of factors including the market yields of other non-investment grade corporate debt. Significant changes in any inputs in isolation would result in significantly different fair value estimates. The methods and assumptions used to estimate fair value are described as follows: Carrying amount is the estimated fair value for cash and cash equivalents, derivatives, noncontractual demand deposits and certain short-term borrowings. As it is not practicable to determine the fair value of Federal Home Loan Bank stock due to restrictions placed on transferability, the estimated fair value is equal to their carrying amount. Security fair values are based on market prices or dealer quotes and, if no such information is available, on the rate and term of the security and information about the issuer including estimates of discounted cash flows when necessary. For fixed rate loans or contractual deposits and for variable rate loans or deposits with infrequent repricing or repricing limits, fair value is based on discounted cash flows using current market rates applied to the estimated life, adjusted for the allowance for loan and lease losses. Fair values for impaired loans are estimated using discounted cash flow analysis or underlying collateral values. Fair value of loans does not necessarily represent exit price. Fair value of long-term debt is based on current rates for similar financing. The fair value of off-balance sheet items that include commitments to extend credit to fund commercial, consumer, real estate construction and real estate-mortgage loans and to fund standby letters of credit is considered nominal.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
Earnings Per Common Share (Tables)	Mar. 31, 2017
Earnings Per Share [Abstract]
Computation of Earnings Per Share	Earnings per share have been computed based on the following: (Shares in thousands) Three Months Ended March 31, 2017 March 31, 2016 Weighted average number of shares outstanding: Basic 51,634 43,063 Dilutive effect of options outstanding 1,427 840 Dilutive effect of unvested restricted shares 66 1 Diluted 53,127 43,904
Weighted Average Anti-Dilutive Stock Options and Unvested Restricted Shares Excluded from the Computation of Diluted Earnings Per Share	Weighted average anti-dilutive stock options and unvested restricted shares excluded from the computation of diluted earnings per share are as follows: (Shares in thousands) Three Months Ended March 31, 2017 March 31, 2016 Anti-dilutive stock options — 39 Anti-dilutive unvested restricted shares 113 —

Business Combinations and Acq25

Business Combinations and Acquisitions Business Combinations and Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Fair Value of Assets and Liabilities	The following table summarizes the fair value of loans, the total contractual principal and interest payments, and management's estimate of expected total cash payments of purchase credit impaired loans: (Dollars in thousands) Fair Value of Acquired Loans Gross Contractual Amounts Receivable Best Estimate of Contractual Cash Flows not to be Collected Loans acquired subject to ASC 310-30 $ 129,075 $ 182,927 $ 34,219 The following table summarizes the Company's investment and CommunityOne's opening balance sheet as of October 26, 2016 adjusted to their preliminary fair value: (Dollars in thousands) Fair value of assets acquired: October 26, 2016 Cash and cash equivalents $ 58,308 Investment securities 488,814 Loans 1,497,785 Premises and equipment 46,763 Goodwill 103,443 Other intangible assets 22,518 Deferred tax asset 60,695 Other assets 82,716 Total assets acquired 2,361,042 Fair value of liabilities assumed: Deposits 1,892,443 Long term debt and other borrowings 105,720 Other liabilities 22,345 Total liabilities assumed 2,020,508 Net assets acquired $ 340,534
Pro-forma Financial Information	Pro-forma data for the three months ending March 31, 2017 and March 31, 2016 listed in the table below presents pro-forma information as if the CommunityOne acquisition occurred at the beginning of 2016. The results include $3.0 million and $1.7 million of transaction and integration expense incurred during the three months ended March 31, 2017 and March 31, 2016, respectively. The pro-forma financial information is not necessarily indicative of the results of operations that would have occurred had the transactions been effected on the assumed dates. (Dollars and shares in thousands, except per share data) For the three months ended March 31, 2017 For the three months ended March 31, 2016 Net interest income $ 82,116 $ 78,072 Net income $ 20,883 $ 13,154 Basic earnings per share $ 0.40 $ 0.25 Diluted earnings per share $ 0.39 $ 0.25

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
Investment Securities (Tables)	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale and Held to Maturity	The amortized cost and estimated fair value of investment securities available-for-sale and held-to-maturity at March 31, 2017 and December 31, 2016 , are presented below: (Dollars in thousands) March 31, 2017 Amortized Unrealized Unrealized Estimated Available-for-Sale Corporate bonds $ 59,737 $ 1,508 $ 143 $ 61,102 State and political subdivisions—tax exempt 11,868 — 706 11,162 Mortgage-backed securities—residential issued by government sponsored entities 1,094,322 1,617 16,843 1,079,096 Industrial revenue bonds 3,068 68 — 3,136 Total $ 1,168,995 $ 3,193 $ 17,692 $ 1,154,496 Held-to-Maturity U.S. Government agencies $ 10,679 $ 111 $ — $ 10,790 Corporate bonds 94,008 600 738 93,870 State and political subdivisions—tax exempt 8,129 532 — 8,661 State and political subdivisions—taxable 518 12 — 530 Mortgage-backed securities—residential issued by government sponsored entities 332,686 1,462 2,303 331,845 Total $ 446,020 $ 2,717 $ 3,041 $ 445,696 (Dollars in thousands) December 31, 2016 Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value Available-for-Sale Corporate bonds $ 28,354 $ 786 $ 187 $ 28,953 State and political subdivisions—tax exempt 11,871 — 794 11,077 Mortgage-backed securities—residential issued by government sponsored entities 883,802 1,644 16,524 868,922 Industrial revenue bonds 3,239 59 — 3,298 Total $ 927,266 $ 2,489 $ 17,505 $ 912,250 Held-to-Maturity U.S. Government agencies $ 11,234 $ 77 $ — $ 11,311 Corporate bonds 94,010 279 2,301 91,988 State and political subdivisions—tax exempt 8,069 389 — 8,458 State and political subdivisions—taxable 520 13 — 533 Mortgage-backed securities—residential issued by government sponsored entities 350,126 1,081 2,586 348,621 Total $ 463,959 $ 1,839 $ 4,887 $ 460,911
Estimated Fair Value of Investment Securities Available for Sale and Held to Maturity by Contractual Maturity	The estimated fair value of investment securities at March 31, 2017 , by contractual maturity, is shown in the table that follows. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations without call or prepayment penalties. Debt securities not due at a single maturity date are shown separately. (Dollars in thousands) March 31, 2017 Amortized Estimated Yield Available-for-Sale Due in one year or less $ — $ — — % Due after one year through five years — — — % Due after five years through ten years 30,197 31,051 3.10 % Due after ten years 44,476 44,349 2.85 % Mortgage-backed securities—residential issued by government sponsored entities 1,094,322 1,079,096 2.32 % Total $ 1,168,995 $ 1,154,496 2.36 % Amortized Estimated Yield Held-to-Maturity Due in one year or less $ 697 $ 699 1.72 % Due after one year through five years 59,749 59,612 4.90 % Due after five years through ten years 41,691 42,220 5.04 % Due after ten years 11,197 11,320 2.86 % Mortgage-backed securities—residential issued by government sponsored entities 332,686 331,845 2.37 % Total $ 446,020 $ 445,696 2.97 %
Securities with Unrealized Losses Not Recognized in Income	Securities with unrealized losses not recognized in income, and the period of time they have been in an unrealized loss position, are as follows: (Dollars in thousands) Less than 12 Months 12 Months or Longer Total March 31, 2017 Estimated Unrealized Estimated Unrealized Estimated Unrealized Available-for-Sale Corporate bonds $ 20,396 $ 143 $ — $ — $ 20,396 $ 143 State and political subdivisions—tax exempt 11,162 706 — — 11,162 706 Mortgage-backed securities—residential issued by government sponsored entities 823,743 16,843 — — 823,743 16,843 Total $ 855,301 $ 17,692 $ — $ — $ 855,301 $ 17,692 Held-to-Maturity U.S. government agencies $ 10,790 $ 333 $ — $ — $ 10,790 $ 333 Corporate bonds 14,975 25 29,325 713 44,300 738 Mortgage-backed securities—residential issued by government sponsored entities 257,034 5,579 8,006 325 265,040 5,904 Total $ 282,799 $ 5,937 $ 37,331 $ 1,038 $ 320,130 $ 6,975 (Dollars in thousands) Less than 12 Months 12 Months or Longer Total December 31, 2016 Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Available-for-Sale Corporate bonds $ — $ — $ 8,412 $ 187 $ 8,412 $ 187 State and political subdivisions - tax exempt 11,077 794 — — 11,077 794 Mortgage-backed securities—residential issued by government sponsored entities 672,672 16,524 — — 672,672 16,524 Total $ 683,749 $ 17,318 $ 8,412 $ 187 $ 692,161 $ 17,505 Held-to-Maturity U.S Government agencies $ 11,311 $ 402 $ — $ — $ 11,311 $ 402 Corporate bonds 24,629 371 28,112 1,930 52,741 2,301 Mortgage-backed securities—residential issued by government sponsored entities 276,555 6,614 8,494 332 285,049 6,946 Total $ 312,495 $ 7,387 $ 36,606 $ 2,262 $ 349,101 $ 9,649

Loans (Tables)

Loans (Tables)	3 Months Ended
Loans (Tables)	Mar. 31, 2017
Receivables [Abstract]
Major Classifications of Loans	Major classifications of loans, including loans held for sale, are as follows: (Dollars in thousands) March 31, 2017 December 31, 2016 Non-owner occupied commercial real estate $ 1,187,344 $ 1,130,883 Other commercial construction and land 350,401 327,622 Multifamily commercial real estate 115,996 117,515 1-4 family residential construction and land 157,920 140,030 Total commercial real estate 1,811,661 1,716,050 Owner occupied commercial real estate 1,313,086 1,321,405 Commercial and industrial 1,443,828 1,468,874 Total commercial 2,756,914 2,790,279 1-4 family residential 1,787,097 1,714,702 Home equity loans 502,099 507,759 Other consumer loans 422,775 448,972 Total consumer 2,711,971 2,671,433 Other 231,409 228,430 Total loans $ 7,511,955 $ 7,406,192
Roll Forward of Accretable Yield	The table below presents a roll forward of accretable yield and income expected to be earned related to PCI loans and the amount of nonaccretable difference at the end of the period. Nonaccretable difference represents estimated contractually required payments in excess of estimated cash flows expected to be collected. The accretable yield represents the excess of estimated cash flows expected to be collected over the carrying amount of the PCI loans. Other represents reductions of accretable yield due to non-credit events such as interest rate reductions on variable rate PCI loans and prepayment activity on PCI loans. (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Accretable Yield Balance at beginning of period $ 161,639 $ 208,844 Accretion of income (18,783 ) (20,843 ) Reclassification from nonaccretable difference 16,357 14,937 Other (6,559 ) (7,873 ) Balance at end of period $ 152,654 $ 195,065 Nonaccretable difference, balance at the end of the period $ 127,657 $ 134,060
Major Categories of Loans	The following is a summary of the major categories of loans outstanding as of March 31, 2017 and December 31, 2016 : (Dollars in thousands) Non-PCI Loans March 31, 2017 New Acquired PCI Loans Total Non-owner occupied commercial real estate $ 744,502 $ 215,582 $ 227,260 $ 1,187,344 Other commercial construction and land 208,508 76,406 65,487 350,401 Multifamily commercial real estate 79,411 16,266 20,319 115,996 1-4 family residential construction and land 131,600 26,007 313 157,920 Total commercial real estate 1,164,021 334,261 313,379 1,811,661 Owner occupied commercial real estate 910,444 233,223 169,419 1,313,086 Commercial and industrial loans 1,270,575 89,755 83,498 1,443,828 Total commercial 2,181,019 322,978 252,917 2,756,914 1-4 family residential 1,089,469 497,469 200,159 1,787,097 Home equity loans 179,315 259,135 63,649 502,099 Other consumer loans 315,339 80,287 27,149 422,775 Total consumer 1,584,123 836,891 290,957 2,711,971 Other 194,182 8,207 29,020 231,409 Total loans $ 5,123,345 $ 1,502,337 $ 886,273 $ 7,511,955 (Dollars in thousands) Non-PCI Loans December 31, 2016 New Acquired PCI Loans Total Loans Non-owner occupied commercial real estate $ 680,044 $ 221,304 $ 229,535 $ 1,130,883 Other commercial construction and land 182,486 73,248 71,888 327,622 Multifamily commercial real estate 77,694 19,108 20,713 117,515 1-4 family residential construction and land 105,816 33,831 383 140,030 Total commercial real estate 1,046,040 347,491 322,519 1,716,050 Owner occupied commercial real estate 901,957 239,982 179,466 1,321,405 Commercial and industrial loans 1,283,012 96,494 89,368 1,468,874 Total commercial 2,184,969 336,476 268,834 2,790,279 1-4 family residential 994,323 505,420 214,959 1,714,702 Home equity loans 172,883 268,093 66,783 507,759 Other consumer loans 330,423 88,134 30,415 448,972 Total consumer 1,497,629 861,647 312,157 2,671,433 Other 185,839 9,776 32,815 228,430 Total loans $ 4,914,477 $ 1,555,390 $ 936,325 $ 7,406,192
Aging of the Recorded Investment in Past Due Loans, Based on Contractual Terms	The following tables present the aging of the recorded investment in past due loans, based on contractual terms, as of March 31, 2017 : (Dollars in thousands) 30-89 Days Past Due Greater than 90 Days Past Due Non-accrual Total Non-purchased credit impaired loans Non-owner occupied commercial real estate $ — $ — $ 2,324 $ 2,324 Other commercial construction and land 120 — 192 312 Multifamily commercial real estate — — — — 1-4 family residential construction and land — — — — Total commercial real estate 120 — 2,516 2,636 Owner occupied commercial real estate — — 4,443 4,443 Commercial and industrial loans 3 — 760 763 Total commercial 3 — 5,203 5,206 1-4 family residential 625 — 968 1,593 Home equity loans 1,350 — 2,246 3,596 Other consumer loans 4,854 — 2,675 7,529 Total consumer 6,829 — 5,889 12,718 Other — — — — Total loans $ 6,952 $ — $ 13,608 $ 20,560 (Dollars in thousands) 30-89 Days Past Due Greater than 90 Days Past Due Non-accrual Total Purchased credit impaired loans * Non-owner occupied commercial real estate $ 13 $ 400 $ — $ 413 Other commercial construction and land 276 880 — 1,156 Multifamily commercial real estate — 432 — 432 1-4 family residential construction and land — — — — Total commercial real estate 289 1,712 — 2,001 Owner occupied commercial real estate 1,158 4,101 — 5,259 Commercial and industrial loans 333 333 — 666 Total commercial 1,491 4,434 — 5,925 1-4 family residential 1,920 2,592 — 4,512 Home equity loans 855 1,129 — 1,984 Other consumer loans 2,467 894 — 3,361 Total consumer 5,242 4,615 — 9,857 Other 294 681 — 975 Total loans $ 7,316 $ 11,442 $ — $ 18,758 The following tables present the aging of the recorded investment in past due loans, based on contractual terms, as of December 31, 2016 : (Dollars in thousands) 30-89 Days Past Due Greater than 90 Days Past Due and Still Accruing/Accreting Non-accrual Total Non-purchased credit impaired loans Non-owner occupied commercial real estate $ — $ — $ 2,584 $ 2,584 Other commercial construction and land 23 — 204 227 Multifamily commercial real estate — — — — 1-4 family residential construction and land 148 — — 148 Total commercial real estate 171 — 2,788 2,959 Owner occupied commercial real estate 2,633 — 2,950 5,583 Commercial and industrial loans 169 — 698 867 Total commercial 2,802 — 3,648 6,450 1-4 family residential 493 — 1,048 1,541 Home equity loans 1,336 — 1,568 2,904 Other consumer loans 8,143 — 2,397 10,540 Total consumer 9,972 — 5,013 14,985 Other — — — — Total loans $ 12,945 $ — $ 11,449 $ 24,394 (Dollars in thousands) 30-89 Days Past Due Greater than 90 Days Past Due and Still Accruing/Accreting Non-accrual Total Purchased credit impaired loans * Non-owner occupied commercial real estate $ — $ 1,130 $ — $ 1,130 Other commercial construction and land 550 777 — 1,327 Multifamily commercial real estate — 420 — 420 1-4 family residential construction and land — — — — Total commercial real estate 550 2,327 — 2,877 Owner occupied commercial real estate 1,844 3,776 — 5,620 Commercial and industrial loans 592 509 — 1,101 Total commercial 2,436 4,285 — 6,721 1-4 family residential 4,288 6,060 — 10,348 Home equity loans 1,128 1,470 — 2,598 Other consumer loans 2,558 1,048 — 3,606 Total consumer 7,974 8,578 — 16,552 Other 87 716 — 803 Total loans $ 11,047 $ 15,906 $ — $ 26,953 * Pooled PCI loans are not classified as nonaccrual as they are considered to be accruing because their interest income relates to the accretable yield recognized under accounting for purchased credit-impaired loans and not to contractual interest payments.
Loans, Excluding Purchased Credit-Impaired Loans by Internal Ratings	The following table summarizes loans, excluding PCI loans, by internal rating at March 31, 2017 : Substandard (Dollars in thousands) Pass Special Mention Accruing Non-accrual Doubtful Total Non-owner occupied commercial real estate $ 954,965 $ 2,795 $ — $ 2,324 $ — $ 960,084 Other commercial construction and land 284,722 — — 192 — 284,914 Multifamily commercial real estate 95,477 — 200 — — 95,677 1-4 family residential construction and land 157,607 — — — — 157,607 Total commercial real estate 1,492,771 2,795 200 2,516 — 1,498,282 Owner occupied commercial real estate 1,108,754 26,546 3,924 4,443 — 1,143,667 Commercial and industrial loans 1,327,963 16,219 15,388 760 — 1,360,330 Total commercial 2,436,717 42,765 19,312 5,203 — 2,503,997 1-4 family residential 1,582,693 1,146 2,131 968 — 1,586,938 Home equity loans 434,571 60 1,573 2,246 — 438,450 Other consumer loans 392,908 — 43 2,675 — 395,626 Total consumer 2,410,172 1,206 3,747 5,889 — 2,421,014 Other 202,389 — — — — 202,389 Total loans $ 6,542,049 $ 46,766 $ 23,259 $ 13,608 $ — $ 6,625,682 The following table summarizes loans, excluding PCI loans, by internal rating at December 31, 2016 : Substandard (Dollars in thousands) Pass Special Mention Accruing Non-accrual Doubtful Total Non-owner occupied commercial real estate $ 896,394 $ 1,251 $ 1,119 $ 2,584 $ — $ 901,348 Other commercial construction and land 255,530 — — 204 — 255,734 Multifamily commercial real estate 96,802 — — — — 96,802 1-4 family residential construction and land 139,647 — — — — 139,647 Total commercial real estate 1,388,373 1,251 1,119 2,788 — 1,393,531 Owner occupied commercial real estate 1,124,285 10,210 4,494 2,950 — 1,141,939 Commercial and industrial loans 1,351,581 16,709 10,518 698 — 1,379,506 Total commercial 2,475,866 26,919 15,012 3,648 — 2,521,445 1-4 family residential 1,495,653 899 2,143 1,048 — 1,499,743 Home equity loans 437,880 62 1,466 1,568 — 440,976 Other consumer loans 416,117 — 43 2,397 — 418,557 Total consumer 2,349,650 961 3,652 5,013 — 2,359,276 Other 195,615 — — — — 195,615 Total loans $ 6,409,504 $ 29,131 $ 19,783 $ 11,449 $ — $ 6,469,867

Allowance for Loan and Lease 28

Allowance for Loan and Lease Losses (Tables)	3 Months Ended
Allowance for Loan and Lease Losses (Tables)	Mar. 31, 2017
Receivables [Abstract]
Allowance for Loan and Lease Losses	Activity in the allowance for loan and lease losses for the three months ended March 31, 2017 and 2016 is as follows: (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Balance, beginning of period $ 43,065 $ 45,034 Provision (reversal) for loan losses for PCI loans 186 (9 ) Provision for loan losses for non-PCI loans 3,206 1,384 Non-PCI loans charged-off (3,183 ) (1,824 ) Recoveries of non-PCI loans previously charged-off 617 678 Balance, end of period $ 43,891 $ 45,263
Roll Forward of Allowance for Loan and Lease Losses	The following tables present the roll forward of the allowance for loan and lease losses for the three months ended March 31, 2017 and 2016 by the class of loans against which the allowance is allocated: (Dollars in thousands) December 31, 2016 Provision/ Net (Charge-offs)/ March 31, 2017 Non-owner occupied commercial real estate $ 1,989 $ (749 ) $ 1 $ 1,241 Other commercial construction and land 12,692 974 2 13,668 Multifamily commercial real estate 171 — — 171 1-4 family residential construction and land 666 73 2 741 Total commercial real estate 15,518 298 5 15,821 Owner occupied commercial real estate 1,397 87 2 1,486 Commercial and industrial loans 9,509 (377 ) (214 ) 8,918 Total commercial 10,906 (290 ) (212 ) 10,404 1-4 family residential 9,188 (308 ) — 8,880 Home equity loans 1,214 (179 ) 44 1,079 Other consumer loans 5,890 3,588 (2,068 ) 7,410 Total consumer 16,292 3,101 (2,024 ) 17,369 Other 349 283 (335 ) 297 Total loans $ 43,065 $ 3,392 $ (2,566 ) $ 43,891 (Dollars in thousands) December 31, 2015 Provision/ Net(Charge-offs)/ March 31, 2016 Non-owner occupied commercial real estate $ 1,598 $ 66 $ 7 $ 1,671 Other commercial construction and land 12,919 274 3 13,196 Multifamily commercial real estate 186 (4 ) — 182 1-4 family residential construction and land 1,275 9 1 1,285 Total commercial real estate 15,978 345 11 16,334 Owner occupied commercial real estate 1,505 262 (80 ) 1,687 Commercial and industrial loans 9,627 465 37 10,129 Total commercial 11,132 727 (43 ) 11,816 1-4 family residential 11,057 (688 ) 5 10,374 Home equity loans 1,853 (370 ) 112 1,595 Other consumer loans 4,751 991 (900 ) 4,842 Total consumer 17,661 (67 ) (783 ) 16,811 Other 263 370 (331 ) 302 Total loans $ 45,034 $ 1,375 $ (1,146 ) $ 45,263
Roll forward of Allowance for Loan and Lease Losses for PCI and Non-PCI Loans	The following tables present the roll forward of the allowance for loan and lease losses for PCI and non-PCI loans for the three months ended March 31, 2017 and 2016 , by the class of loans against which the allowance is allocated: (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Non-PCI PCI Total Non-PCI PCI Total Allowance for loan and lease losses at the beginning of the period $ 20,050 $ 23,015 $ 43,065 $ 20,546 $ 24,488 $ 45,034 Charge-offs: Non-owner occupied commercial real estate — — — (1 ) — (1 ) Other commercial construction and land — — — — — — Multifamily commercial real estate — — — — — — 1-4 family residential construction and land — — — — — — Total commercial real estate — — — (1 ) — (1 ) Owner occupied commercial real estate (6 ) — (6 ) (80 ) — (80 ) Commercial and industrial loans (240 ) — (240 ) (1 ) — (1 ) Total commercial (246 ) — (246 ) (81 ) — (81 ) 1-4 family residential (2 ) — (2 ) — — — Home equity loans (39 ) — (39 ) (61 ) — (61 ) Other consumer loans (2,322 ) — (2,322 ) (1,129 ) — (1,129 ) Total consumer (2,363 ) — (2,363 ) (1,190 ) — (1,190 ) Other (574 ) — (574 ) (552 ) — (552 ) Total charge-offs (3,183 ) — (3,183 ) (1,824 ) — (1,824 ) Recoveries: Non-owner occupied commercial real estate 1 — 1 8 — 8 Other commercial construction and land 2 — 2 3 — 3 Multifamily commercial real estate — — — — — — 1-4 family residential construction and land 2 — 2 1 — 1 Total commercial real estate 5 — 5 12 — 12 Owner occupied commercial real estate 8 — 8 — — — Commercial and industrial loans 26 — 26 38 — 38 Total commercial 34 — 34 38 — 38 1-4 family residential 2 — 2 5 — 5 Home equity loans 83 — 83 173 — 173 Other consumer loans 254 — 254 229 — 229 Total consumer 339 — 339 407 — 407 Other 239 — 239 221 — 221 Total recoveries 617 — 617 678 — 678 Net charge-offs (2,566 ) — (2,566 ) (1,146 ) — (1,146 ) Provision (reversal) for loan and lease losses: Non-owner occupied commercial real estate 29 (778 ) (749 ) (51 ) 117 66 Other commercial construction and land (150 ) 1,124 974 (103 ) 377 274 Multifamily commercial real estate 26 (26 ) — (14 ) 10 (4 ) 1-4 family residential construction and land 73 — 73 41 (32 ) 9 Total commercial real estate (22 ) 320 298 (127 ) 472 345 Owner occupied commercial real estate 146 (59 ) 87 138 124 262 Commercial and industrial loans (688 ) 311 (377 ) 306 159 465 Total commercial (542 ) 252 (290 ) 444 283 727 1-4 family residential (82 ) (226 ) (308 ) (100 ) (588 ) (688 ) Home equity loans (13 ) (166 ) (179 ) (155 ) (215 ) (370 ) Other consumer loans 3,549 39 3,588 984 7 991 Total consumer 3,454 (353 ) 3,101 729 (796 ) (67 ) Other 316 (33 ) 283 338 32 370 Total provision (reversal) for loan and lease losses 3,206 186 3,392 1,384 (9 ) 1,375 Allowance for loan and lease losses at the end of the period $ 20,690 $ 23,201 $ 43,891 $ 20,784 $ 24,479 $ 45,263
Summary of Allowance for Loan and Lease Losses and Recorded Investment in Loans by Class of Loans and by Impairment Evaluation	The following table presents the balance in the allowance for loan and lease losses and the recorded investment in loans by class of loan and by impairment evaluation method as of March 31, 2017 : (Dollars in thousands) Allowance for Loan and Lease Losses Loans Individually Collectively Purchased Individually Collectively Purchased Non-owner occupied commercial real estate $ — $ 989 $ 252 $ 2,797 $ 957,287 $ 227,260 Other commercial construction and land 22 1,528 12,118 123 284,791 65,487 Multifamily commercial real estate — 75 96 — 95,677 20,319 1-4 family residential construction and land — 741 — — 157,607 313 Total commercial real estate 22 3,333 12,466 2,920 1,495,362 313,379 Owner occupied commercial real estate 1 1,289 196 8,670 1,134,997 169,419 Commercial and industrial loans — 5,628 3,290 9,377 1,350,953 83,498 Total commercial 1 6,917 3,486 18,047 2,485,950 252,917 1-4 family residential 122 2,053 6,705 1,969 1,579,989 200,159 Home equity loans 126 541 412 1,451 436,999 63,649 Other consumer loans 12 7,279 119 453 395,173 27,149 Total consumer 260 9,873 7,236 3,873 2,412,161 290,957 Other — 284 13 — 202,389 29,020 Total loans $ 283 $ 20,407 $ 23,201 $ 24,840 $ 6,595,862 $ 886,273 (1) Loans collectively evaluated for impairment include $1.4 billion of acquired loans which are presented net of unamortized purchase discounts of $18.5 million . The following table presents the balance in the allowance for loan and lease losses and the recorded investment in loans by class of loan and by impairment evaluation method as of December 31, 2016 : (Dollars in thousands) Allowance for Loan and Lease Losses Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Purchased Credit- Impaired Individually Evaluated for Impairment Collectively Evaluated for Impairment (1) Purchased Credit- Impaired Non-owner occupied commercial real estate $ — $ 959 $ 1,030 $ 2,835 $ 898,513 $ 229,535 Other commercial construction and land 20 1,678 10,994 109 255,625 71,888 Multifamily commercial real estate — 49 122 — 96,802 20,713 1-4 family residential construction and land — 666 — — 139,647 383 Total commercial real estate 20 3,352 12,146 2,944 1,390,587 322,519 Owner occupied commercial real estate 1 1,141 255 8,858 1,133,081 179,466 Commercial and industrial loans 6 6,524 2,979 9,548 1,369,958 89,368 Total commercial 7 7,665 3,234 18,406 2,503,039 268,834 1-4 family residential 121 2,136 6,931 1,963 1,484,906 214,959 Home equity loans 113 523 578 1,392 439,584 66,783 Other consumer loans 13 5,797 80 452 418,105 30,415 Total consumer 247 8,456 7,589 3,807 2,342,595 312,157 Other — 303 46 — 195,615 32,815 Total loans $ 274 $ 19,776 $ 23,015 $ 25,157 $ 6,431,836 $ 936,325 (1) Loans collectively evaluated for impairment include $1.6 billion of acquired loans which are presented net of unamortized purchase discounts of $20.0 million .

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	3 Months Ended
Other Real Estate Owned (Tables)	Mar. 31, 2017
Banking and Thrift [Abstract]
Other Real Estate Owned	The activity within Other Real Estate Owned (“OREO”) for the three months ended March 31, 2017 and 2016 is presented in the table below. For the three months ended March 31, 2017 and 2016 , proceeds on sales of OREO were $4.9 million and $7.1 million , respectively and net gains were $0.3 million and $0.7 million , respectively. (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Balance, beginning of period $ 53,482 $ 52,776 Real estate acquired from borrowers and transfers from other assets 2,428 2,588 Valuation allowance (247 ) (467 ) Properties sold (4,613 ) (6,392 ) Balance, end of period $ 51,050 $ 48,505

Federal Home Loan Bank Advanc30

Federal Home Loan Bank Advances and Short-Term Borrowings (Tables)	3 Months Ended
	Mar. 31, 2017
Advances from Federal Home Loan Banks [Abstract]
Federal Home Loan Bank Advances	The FHLB advances as of March 31, 2017 and December 31, 2016 consisted of the following: (Dollars in thousands) Contractual Outstanding Amount March 31, 2017 Maturity Date Interest Rate as of March 31, 2017 $ 50,000 May 19, 2017 1.07% 230 November 6, 2017 0.50% 50,000 November 20, 2017 0.87% (1 Month FRC + 2 bps)* 50,000 November 23, 2018 0.91% (1 Month FRC + 2 bps)* 50,000 December 31, 2019 0.92% (1 Month FRC + 2 bps)* 60,000 May 28, 2020 0.92% (1 Month FRC + 2 bps)* 80,000 September 20, 2021 0.93% (1 Month FRC + 8 bps)* 75,000 September 29, 2021 0.98% (1 Month FRC + 8 bps)* 75,000 January 20, 2022 0.93% (1 Month FRC + 8 bps)* 420 February 10, 2026 —% $ 490,650 (Dollars in thousands) Contractual Outstanding Amount December 31, 2016 Maturity Date Interest Rate as of December 31, 2016 $ 25,000 January 20, 2017 0.63% 155,000 May 19, 2017 0.80% 271 November 6, 2017 0.50% 50,000 November 20, 2017 0.65% (1 Month FRC + 2 bps)* 50,000 November 23, 2018 0.66% (1 Month FRC + 2 bps)* 50,000 December 31, 2019 0.64% (1 Month FRC + 2 bps)* 60,000 May 28, 2020 0.63% (1 Month FRC + 2 bps)* 80,000 September 20, 2021 0.71% (1 Month FRC + 8 bps)* 75,000 September 29, 2021 0.71% (1 Month FRC + 8 bps)* 430 February 10, 2026 —% $ 545,701 (*) FRC = FHLB Fixed Rate Credit interest rate.

Long-Term Borrowings (Tables)

Long-Term Borrowings (Tables)	3 Months Ended
Long-Term Borrowings (Tables)	Mar. 31, 2017
Debt Disclosure [Abstract]
Subordinated Debentures	The subordinated debentures as of March 31, 2017 and December 31, 2016 consisted of the following: (Dollars in thousands) Carrying Amount Date of Offering Face Amount March 31, 2017 December 31, 2016 Interest Rate as of March 31, 2017 Maturity Date July 31, 2001 $ 5,000 $ 4,034 $ 4,018 4.62 % (3 Month LIBOR + 358 bps) July 31, 2031 July 31, 2001 4,000 2,848 2,831 4.62 % (3 Month LIBOR + 358 bps) July 31, 2031 December 20, 2002 5,000 3,561 3,544 4.50 % (3 Month LIBOR + 335 bps) December 30, 2032 June 26, 2003 10,000 6,260 6,231 4.25 % (3 Month LIBOR + 310 bps) June 26, 2033 September 25, 2003 10,000 6,862 6,823 3.87 % (3 Month LIBOR + 285 bps) October 8, 2033 December 30, 2003 10,000 6,049 6,020 3.88 % (3 Month LIBOR + 285 bps) December 30, 2033 June 28, 2005 3,000 1,710 1,697 2.81 % (3 Month LIBOR + 168 bps) June 28, 2035 November 4, 2005 20,000 10,178 10,085 2.50 % (3 Month LIBOR + 137 bps) December 15, 2035 December 22, 2005 10,000 4,897 4,863 2.53 % (3 Month LIBOR + 140 bps) March 15, 2036 December 28, 2005 13,000 7,163 7,107 2.67 % (3 Month LIBOR + 154 bps) March 15, 2036 April 27, 2006 30,000 14,953 14,816 2.47 % (3 Month LIBOR + 132 bps) June 30, 2036 June 23, 2006 20,000 12,169 12,092 2.57 % (3 Month LIBOR + 155 bps) July 7, 2036 May 16, 2007 56,000 30,915 30,685 2.78 % (3 Month LIBOR + 165 bps) June 15, 2037 June 15, 2007 10,000 5,673 5,644 2.53 % (3 Month LIBOR + 143 bps) September 6, 2037 Total $ 206,000 $ 117,272 $ 116,456

Shareholders' Equity and Mini32

Shareholders' Equity and Minimum Regulatory Capital Requirements (Tables)	3 Months Ended
	Mar. 31, 2017
Regulatory Capital Requirements [Abstract]
Schedule of Minimum and Actual Ratios	These minimum ratios along with the actual ratios for the Company and the Bank are presented in the following tables: (Dollars in thousands) Well Capitalized Adequately Capitalized Actual March 31, 2017 Amount Ratio Amount Ratio Amount Ratio Tier 1 Leverage Capital (to Average Assets) CBF Consolidated N/A N/A $ 383,662 ≥ 4.0% $ 1,115,279 11.6% Bank $ 478,803 ≥ 5.0% $ 383,042 ≥ 4.0% $ 1,022,161 10.7% Tier 1 Common Equity Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 373,798 ≥ 4.5% $ 1,011,778 12.2% Bank $ 539,229 ≥ 6.5% $ 373,312 ≥ 4.5% $ 1,022,161 12.3% Tier 1 Risk-based Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 498,397 ≥ 6.0% $ 1,115,279 13.4% Bank $ 663,666 ≥ 8.0% $ 497,749 ≥ 6.0% $ 1,022,161 12.3% Total Risk-based Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 664,529 ≥ 8.0% $ 1,159,635 14.0% Bank $ 829,582 ≥ 10.0% $ 663,666 ≥ 8.0% $ 1,066,518 12.9% (Dollars in thousands) Well Capitalized Requirement Adequately Capitalized Requirement Actual December 31, 2016 Amount Ratio Amount Ratio Amount Ratio Tier 1 Capital (to Average Assets) CBF Consolidated N/A N/A $ 360,513 ≥ 4.0% $ 1,101,743 12.2% Bank $ 450,006 ≥ 5.0% $ 360,005 ≥ 4.0% $ 1,010,409 11.2% Tier 1 Common Equity Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 367,521 ≥ 4.5% $ 1,012,831 12.4% Bank $ 529,887 ≥ 6.5% $ 366,845 ≥ 4.5% $ 1,010,409 12.4% Tier 1 Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 490,028 ≥ 6.0% $ 1,101,743 13.5% Bank $ 652,169 ≥ 8.0% $ 489,127 ≥ 6.0% $ 1,010,409 12.4% Total Capital (to Risk-weighted Assets) CBF Consolidated N/A N/A $ 653,371 ≥ 8.0% $ 1,145,351 14.0% Bank $ 815,211 ≥ 10.0% $ 652,169 ≥ 8.0% $ 1,054,016 12.9%

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
Stock-Based Compensation (Tables)	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Components and Classification of Stock-Based Compensation Expense	The following table summarizes the components and classification of stock-based compensation expense for the three months ended March 31, 2017 and 2016 : (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Stock options $ 24 $ 9 Restricted stock 876 308 Total stock-based compensation expense $ 900 $ 317
Weighted Average Assumptions Used to Compute Fair Value	The following table summarizes the weighted average assumptions used to compute the grant-date fair value of options granted during the three months ended March 31, 2017 : Three Months Ended March 31, 2017 Dividend yield 1.21% Risk-free interest rate 2.13% Expected option life 6.00 years Volatility 21.94% Weighted average grant-date fair value of options granted $8.61
Stock Option Activity	A summary of the stock option activity for the three months ended March 31, 2017 and 2016 is as follows: Three Months Ended March 31, 2017 March 31, 2016 (Shares in thousands) Shares Weighted Shares Weighted Balance, January 1, 3,180 $ 20.86 3,075 $ 20.12 Granted 15 39.55 30 30.54 Exercised (57 ) 21.06 (10 ) 18.00 Canceled, expired or forfeited — — — — Balance, March 31, 3,138 $ 20.94 3,095 $ 20.23
Options Outstanding	Options outstanding at March 31, 2017 were as follows: (Shares in thousands) Outstanding Options Exercisable Options Range of Exercise Prices Shares Weighted Average Remaining Contractual Life Weighted Average Exercise Price Per Share Shares Weighted Average Exercise Price Per Share $18.00 145 6.14 years $ 18.00 145 $ 18.00 $18.01 - $20.00 2,819 3.23 years 20.00 2,819 20.00 $20.01 - $1,095.00 174 7.91 years 37.63 117 38.50 $18.00 - $2,026.00 3,138 3.63 years $ 20.94 3,081 $ 20.67
Unvested Restricted Stock Activity	The following table summarizes unvested restricted stock activity for the three months ended March 31, 2017 and 2016 : Three Months Ended March 31, 2017 March 31, 2016 (Shares in thousands) Shares Weighted Shares Weighted Balance, January 1, 197 $ 30.10 — $ — Granted 165 39.56 185 30.54 Vested or released (61 ) 30.54 — — Canceled, expired or forfeited — — — — Balance, March 31 301 $ 35.51 185 $ 30.54

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
Income Taxes (Tables)	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Reconciliation of Income Tax Computed at Applicable Federal Statutory Income Tax Rates to Total Income Taxes	A reconciliation of income tax computed at applicable Federal statutory income tax rates to total income tax expense reported for the three months ended March 31, 2017 and 2016 is as follows: (Dollars in thousands) Three Months Ended March 31, 2017 March 31, 2016 Income before income taxes $ 31,873 $ 15,620 Income taxes computed at Federal statutory tax rate 11,156 5,467 Effect of: State taxes (net of federal benefit) 801 470 State statutory rate change — 13 Tax-exempt interest income, net (334 ) (170 ) Other, net (633 ) — Total income tax expense $ 10,990 $ 5,780

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
Fair Value (Tables)	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	Assets and liabilities measured at fair value on a recurring basis as of March 31, 2017 are summarized below: (Dollars in thousands) Fair Value Measurement Using: Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Trading securities $ 4,150 $ — $ 4,150 $ — Available-for-sale securities: Mortgage-backed securities—residential $ 1,079,096 $ — $ 1,079,096 $ — Industrial revenue bonds 3,136 — — 3,136 Corporate bonds 61,102 — 61,102 — State and political subdivisions—tax exempt 11,162 — 11,162 — Available-for-sale securities $ 1,154,496 $ — $ 1,151,360 $ 3,136 Gross asset value of derivatives $ 1,397 $ — $ 1,397 $ — Liabilities Gross liability value of derivatives $ 2,372 $ — $ 2,372 $ — There were no transfers of assets and liabilities between levels of the fair value hierarchy during the three months ended March 31, 2017 . Assets and liabilities measured at fair value on a recurring basis as of December 31, 2016 are summarized below: (Dollars in thousands) Fair Value Measurement Using: Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Trading securities $ 3,791 $ — $ 3,791 $ — Available-for-sale securities: Mortgage-backed securities-residential $ 868,922 $ — $ 868,922 $ — State and political subdivisions - tax exempt 11,077 — 11,077 — Industrial revenue bonds 3,298 — — 3,298 Corporate bonds 28,953 — 28,953 — Available-for-sale securities $ 912,250 $ — $ 908,952 $ 3,298 Gross asset value of derivatives $ 1,078 $ — $ 1,078 $ — Liabilities Gross liability value of derivatives $ 1,354 $ — $ 1,354 $ —
Fair Value Measurements on Recurring Basis Using Significant Unobservable Inputs (Level 3)	The table below presents the activity and income statement classifications of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended and held at March 31, 2017 : (Dollars in thousands) Fair Value Measurement Using Significant Unobservable Inputs (Level 3) Industrial Revenue Bonds Beginning balance, January 1, 2017 $ 3,298 Principal reduction (170 ) Included in other comprehensive income 8 Ending balance, March 31, 2017 $ 3,136 (Dollars in thousands) Fair Value Measurement Using Significant Unobservable Inputs (Level 3) Industrial Revenue Bonds Beginning balance, January 1, 2016 $ 3,437 Principal reduction (170 ) Included in other comprehensive income (18 ) Ending balance, March 31, 2016 $ 3,249
Quantitative Information About Recurring Level 3 Fair Value Measurements	(Dollars in thousands) Fair Value at Valuation Technique Significant Range Industrial revenue bonds $ 3,136 Discounted cash flow Discount rate 3.21% - 3.24% Illiquidity factor 0.5% (Dollars in thousands) Fair Value at December 31, 2016 Valuation Technique Significant Unobservable Input Range Industrial revenue bonds $ 3,298 Discounted cash flow Discount rate 3.31% - 3.35% Illiquidity factor 0.5%
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis	Assets and liabilities measured at fair value on a nonrecurring basis as of December 31, 2016 are summarized below: (Dollars in thousands) Fair Value Measurement Using: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Other real estate owned $ — $ — $ 41,168 Other repossessed assets 163 — — Impaired loans — — 1,420 Assets and liabilities measured at fair value on a nonrecurring basis as of March 31, 2017 are summarized below: (Dollars in thousands) Fair Value Measurement Using: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Other real estate owned $ — $ — $ 42,001 Other repossessed assets 206 — — Impaired loans — — 1,107
Quantitative Information About Nonrecurring Level 3 Fair Value Measurements	(Dollars in thousands) Fair Value at Valuation Technique Significant Unobservable Input Weighted Average Other real estate owned $ 42,001 Fair value of property None —% Impaired loans 1,107 Fair value of collateral None —% (Dollars in thousands) Fair Value at December 31, 2016 Valuation Technique Significant Unobservable Input Weighted Average Other real estate owned $ 41,168 Fair value of property None —% Impaired loans 1,420 Fair value of collateral None —%
Carrying Amounts and Estimated Fair Values of Financial Instruments	Carrying amount and estimated fair values of financial instruments were as follows: (Dollars in thousands) Fair Value Measurement March 31, 2017 Carrying Value Estimated Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 160,547 $ 160,547 $ 160,547 $ — $ — Trading securities 4,150 4,150 — 4,150 — Investment securities available-for-sale 1,154,496 1,154,496 — 1,151,360 3,136 Investment securities held-to-maturity 446,020 445,696 — 445,696 — Loans, net 7,468,064 7,478,239 — 4,980 7,473,259 Other earning assets (1) 29,796 29,796 — — 29,796 Gross asset value of derivatives 1,397 1,397 — 1,397 — Total financial assets $ 9,264,470 $ 9,274,321 $ 160,547 $ 1,607,583 $ 7,506,191 Financial Liabilities Non-contractual deposits $ 5,958,134 $ 5,958,134 $ — $ 5,958,134 $ — Contractual deposits 2,134,473 2,118,049 — 2,118,049 — Federal Home Loan Bank advances 490,650 489,540 — 489,540 — Short-term borrowings 21,125 21,122 — 21,122 — Subordinated debentures 117,272 116,645 — — 116,645 Gross liability value of derivatives 2,372 2,372 — 2,372 — Total financial liabilities $ 8,724,026 $ 8,705,862 $ — $ 8,589,217 $ 116,645 (1) Includes Federal Home Loan Bank stock. (Dollars in thousands) Fair Value Measurement December 31, 2016 Carrying Value Estimated Fair Value Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 309,055 $ 309,055 $ 309,055 $ — $ — Trading securities 3,791 3,791 — 3,791 — Investment securities available-for-sale 912,250 912,250 — 908,952 3,298 Investment securities held-to-maturity 463,959 460,911 — 460,911 — Loans, net 7,363,127 7,395,128 — 12,874 7,382,254 Other earning assets (1) 32,050 32,050 — — 32,050 Gross asset value of derivatives 1,078 1,078 — 1,078 — Total financial assets $ 9,085,310 $ 9,114,263 $ 309,055 $ 1,387,606 $ 7,417,602 Financial Liabilities Non-contractual deposits $ 5,743,316 $ 5,743,316 $ — $ 5,743,316 $ — Contractual deposits 2,137,312 2,121,519 — 2,121,519 — Federal Home Loan Bank advances 545,701 546,023 — 546,023 — Short-term borrowings 19,157 19,154 — 19,154 — Subordinated debentures 116,456 114,593 — — 114,593 Gross liability value of derivatives 1,354 1,354 — 1,354 — Total financial liabilities $ 8,563,296 $ 8,545,959 $ — $ 8,431,366 $ 114,593 (1) Includes Federal Home Loan Bank stock.

Derivative and Hedging Activi36

Derivative and Hedging Activities (Tables)	3 Months Ended
Derivative and Hedging Activities (Tables)	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Derivative Instrument Contracts at Fair Value and Balance Sheet Classification	The Company’s derivative instrument contracts at fair value as well as their classification on the Company's Consolidated Balance Sheet is presented below: (Dollars in thousands) March 31, 2017 December 31, 2016 Number of instruments Balance Sheet Location Fair Value Notional Fair Value Notional Asset derivatives Derivatives designated as hedging instruments Interest rate swap — Other assets $ — $ — $ 130 $ 120,000 Derivatives not designated as hedging instruments Forward loan sales contracts 87 Other assets 116 15,739 13 4,205 Interest rate swap 7 Other assets 1,281 39,588 935 24,947 Total asset derivatives $ 1,397 $ 55,327 $ 1,078 $ 149,152 Liability derivatives Derivatives designated as hedging instruments Interest rate swap 4 Other liabilities $ 1,131 $ 235,000 $ 378 $ 115,000 Derivatives not designated as hedging instruments Forward loan sales contracts 1 Other liabilities 1 214 114 11,870 Interest rate swap 7 Other liabilities 1,240 39,855 862 24,947 Total liability derivatives $ 2,372 $ 275,069 $ 1,354 $ 151,817
Summary of Derivative Instrument on the Consolidated Statements of Income	The table below presents the effect of the Company's derivative financial instruments on the Consolidated Statements of Income for the three months ended March 31, 2017 : (Dollars in thousands) Three Months Ended March 31, 2017 Derivatives in Cash Flow Hedging Relationship Amount of Loss Recognized in Accumulated OCI on Derivative (Effective Portion) Location of Gain Reclassified from Accumulated OCI into Income (Effective Portion) Amount of Gain Reclassified from Accumulated OCI on Derivative (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion) Amount Recognized in Income on Derivative (Ineffective Portion) Interest rate swap $ (451 ) Interest income $ 432 N/A $ —
Offsetting Derivative Assets	The table below presents a gross presentation, the effects of offsetting, and a net presentation of the Company's derivatives as of March 31, 2017 : Gross Amounts Not Offset in the Balance Sheets (Dollars in thousands) Gross Amount of Recognized Assets Gross Amount Offset in the Balance Sheets Net Amount of Assets Presented in the Balance Sheets Financial Instruments Cash Collateral Net Amount Offsetting of derivative assets: Interest rate swap $ 1,281 $ — $ 1,281 $ 635 $ 364 $ 282 Total $ 1,281 $ — $ 1,281 $ 635 $ 364 $ 282 Offsetting of derivative liabilities: Interest rate swap 2,371 — 2,371 635 792 $ 944 Total $ 2,371 $ — $ 2,371 $ 635 $ 792 $ 944
Offsetting Derivative Liabilities	The table below presents a gross presentation, the effects of offsetting, and a net presentation of the Company's derivatives as of March 31, 2017 : Gross Amounts Not Offset in the Balance Sheets (Dollars in thousands) Gross Amount of Recognized Assets Gross Amount Offset in the Balance Sheets Net Amount of Assets Presented in the Balance Sheets Financial Instruments Cash Collateral Net Amount Offsetting of derivative assets: Interest rate swap $ 1,281 $ — $ 1,281 $ 635 $ 364 $ 282 Total $ 1,281 $ — $ 1,281 $ 635 $ 364 $ 282 Offsetting of derivative liabilities: Interest rate swap 2,371 — 2,371 635 792 $ 944 Total $ 2,371 $ — $ 2,371 $ 635 $ 792 $ 944

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017USD ($)depository_institutionofficebank	Dec. 31, 2017USD ($)bank
Business Acquisition [Line Items]
Amount raised through private placements and an initial public offering during year of inception	$ 955.6
Number of depository institutions acquired since inception \| depository_institution	8
Total number of full service banking offices \| office	193
Bank branch \| Held-for-sale
Business Acquisition [Line Items]
Property held for sale	$ 6.2
CommunityOne
Business Acquisition [Line Items]
Number of acquired branches closed and consolidated \| bank	3
CommunityOne \| Forecast
Business Acquisition [Line Items]
Number of acquired branches closed and consolidated \| bank		15
Integration related costs		$ 4

Earnings Per Common Share - Com

Earnings Per Common Share - Computation of Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Weighted average number of shares outstanding:
Basic (in shares)	51,634	43,063
Diluted (in shares)	53,127	43,904
Options
Weighted average number of shares outstanding:
Dilutive effect (in shares)	1,427	840
Unvested restricted shares
Weighted average number of shares outstanding:
Dilutive effect (in shares)	66	1

Earnings Per Common Share - Wei

Earnings Per Common Share - Weighted Average Anti-Dilutive Stock Options and Unvested Restricted Shares Excluded from the Computation of Diluted Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares (in shares)	0	39
Unvested restricted shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares (in shares)	113	0

Business Combinations and Acq40

Business Combinations and Acquisitions - Additional Information (Details) $ in Thousands, shares in Millions	Oct. 26, 2016USD ($)bankshares	Mar. 31, 2017USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)
Business Acquisition [Line Items]
Goodwill		$ 234,158		$ 235,500
Loans	$ 1,400,000
Estimated cash flow of loans	1,600,000
Transaction and integration expense incurred		3,037	$ 1,687
CommunityOne
Business Acquisition [Line Items]
Total assets	$ 2,361,042
Number of banking locations \| bank	45
Total transaction value	$ 340,500
Cash paid to acquire business	51,900
Goodwill	103,443
Increase due to recovery on fully charged off loan		400
Increase in deferred tax asset		1,000
Decrease in goodwill		1,400
Loans	1,497,785
Estimated fair value of core deposits	1,892,443
Transaction and integration expense incurred		$ 3,000	$ 1,700
CommunityOne \| Core deposits
Business Acquisition [Line Items]
Estimated fair value of core deposits	$ 19,900
CommunityOne \| Common stock
Business Acquisition [Line Items]
Outstanding stock acquired (as percent)	100.00%
Common stock issued to acquire business (in shares) \| shares	8.9
Common stock issued to acquire business	$ 288,600
CommunityOne \| Common stock \| Core deposits
Business Acquisition [Line Items]
Estimated useful life of intangible asset	10 years

Business Combinations and Acq41

Business Combinations and Acquisitions - Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Oct. 26, 2016
Fair value of assets acquired:
Loans			$ 1,400,000
Goodwill	$ 234,158	$ 235,500
CommunityOne
Fair value of assets acquired:
Cash and cash equivalents			58,308
Investment securities			488,814
Loans			1,497,785
Premises and equipment			46,763
Goodwill			103,443
Other intangible assets			22,518
Deferred tax asset			60,695
Other assets			82,716
Total assets acquired			2,361,042
Fair value of liabilities assumed:
Deposits			1,892,443
Long term debt and other borrowings			105,720
Other liabilities			22,345
Total liabilities assumed			2,020,508
Net assets acquired			$ 340,534

Business Combinations and Acq42

Business Combinations and Acquisitions - Loans Acquired Subject to ASC 310-30 (Details) $ in Thousands	Oct. 26, 2016USD ($)
Business Acquisition [Line Items]
Fair Value of Acquired Loans	$ 1,400,000
Gross Contractual Amounts Receivable	1,600,000
CommunityOne
Business Acquisition [Line Items]
Fair Value of Acquired Loans	1,497,785
Loans acquired subject to ASC 310-30 \| CommunityOne
Business Acquisition [Line Items]
Fair Value of Acquired Loans	129,075
Gross Contractual Amounts Receivable	182,927
Best Estimate of Contractual Cash Flows not to be Collected	$ 34,219

Business Combinations and Acq43

Business Combinations and Acquisitions - Pro-forma Financial Information (Details) - CommunityOne - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Business Acquisition [Line Items]
Net interest income	$ 82,116	$ 78,072
Net income	$ 20,883	$ 13,154
Basic earnings per share (in dollars per share)	$ 0.40	$ 0.25
Diluted earnings per share (in dollars per share)	$ 0.39	$ 0.25

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	3 Months Ended
Investment Securities - Additional Information (Detail)	Mar. 31, 2017USD ($)security	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)
Investments, Debt and Equity Securities [Abstract]
Trading securities	$ 4,150,000		$ 3,791,000
Proceeds from sale of securities	$ 0	$ 0
Number of securities in portfolio \| security	176
Number of securities in portfolio in an unrealized loss position \| security	91
Investment securities, carrying values	$ 660,300,000		$ 621,800,000

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale and Held to Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Available-for-Sale
Amortized Cost	$ 1,168,995	$ 927,266
Unrealized Gains	3,193	2,489
Unrealized Losses	17,692	17,505
Estimated Fair Value	1,154,496	912,250
Held-to-Maturity
Amortized Cost	446,020	463,959
Unrealized Gains	2,717	1,839
Unrealized Losses	3,041	4,887
Fair value of investment securities held-to-maturity	445,696	460,911
Corporate bonds
Available-for-Sale
Amortized Cost	59,737	28,354
Unrealized Gains	1,508	786
Unrealized Losses	143	187
Estimated Fair Value	61,102	28,953
State and political subdivisions—tax exempt
Available-for-Sale
Amortized Cost	11,868	11,871
Unrealized Gains	0	0
Unrealized Losses	706	794
Estimated Fair Value	11,162	11,077
Mortgage-backed securities—residential issued by government sponsored entities
Available-for-Sale
Amortized Cost	1,094,322	883,802
Unrealized Gains	1,617	1,644
Unrealized Losses	16,843	16,524
Estimated Fair Value	1,079,096	868,922
Industrial revenue bonds
Available-for-Sale
Amortized Cost	3,068	3,239
Unrealized Gains	68	59
Unrealized Losses	0	0
Estimated Fair Value	3,136	3,298
U.S. Government agencies
Held-to-Maturity
Amortized Cost	10,679	11,234
Unrealized Gains	111	77
Unrealized Losses	0	0
Fair value of investment securities held-to-maturity	10,790	11,311
Corporate bonds
Held-to-Maturity
Amortized Cost	94,008	94,010
Unrealized Gains	600	279
Unrealized Losses	738	2,301
Fair value of investment securities held-to-maturity	93,870	91,988
State and political subdivisions—tax exempt
Held-to-Maturity
Amortized Cost	8,129	8,069
Unrealized Gains	532	389
Unrealized Losses	0	0
Fair value of investment securities held-to-maturity	8,661	8,458
State and political subdivisions—taxable
Held-to-Maturity
Amortized Cost	518	520
Unrealized Gains	12	13
Unrealized Losses	0	0
Fair value of investment securities held-to-maturity	530	533
Mortgage-backed securities—residential issued by government sponsored entities
Held-to-Maturity
Amortized Cost	332,686	350,126
Unrealized Gains	1,462	1,081
Unrealized Losses	2,303	2,586
Fair value of investment securities held-to-maturity	$ 331,845	$ 348,621

Investment Securities - Estimat

Investment Securities - Estimated Fair Value of Investment Securities Available for Sale and Held to Maturity by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Amortized Cost
Amortized Cost	$ 1,168,995	$ 927,266
Estimated Fair Value
Total	$ 1,154,496	912,250
Yield
Total (as a percent)	2.36%
Amortized Cost
Amortized Cost	$ 446,020	463,959
Estimated Fair Value
Total	$ 445,696	460,911
Yield
Total (as a percent)	2.97%
Debt Securities
Amortized Cost
Available-for-sale, due in one year or less	$ 0
Available-for-sale, due after one year through five years	0
Available-for-sale, due after five years through ten years	30,197
Available-for-sale, due after ten years	44,476
Estimated Fair Value
Available-for-sale, due in one year or less	0
Available-for-sale, due after one year through five years	0
Available-for-sale, due after five years through ten years	31,051
Available-for-sale, due after ten years	$ 44,349
Yield
Available-for-sale, due in one year or less (as a percent)	0.00%
Available-for-sale, due after one year through five years (as a percent)	0.00%
Available-for-sale, due after five years through ten years (as a percent)	3.10%
Available-for-sale, due after ten years (as a percent)	2.85%
Mortgage-backed securities—residential issued by government sponsored entities
Amortized Cost
Available-for-sale	$ 1,094,322
Amortized Cost	1,094,322	883,802
Estimated Fair Value
Available-for-sale	1,079,096
Total	$ 1,079,096	868,922
Yield
Available-for-sale (as a percent)	2.32%
Debt Securities
Amortized Cost
Held-to-maturity, due in one year or less	$ 697
Held-to-maturity, due after one year through five years	59,749
Held-to-maturity, due after five years through ten years	41,691
Held-to-maturity, due after ten years	11,197
Estimated Fair Value
Held-to-maturity, due in one year or less	699
Held-to-maturity, due after one year through five years	59,612
Held-to-maturity, due after five years through ten years	42,220
Held-to-maturity, due after ten years	$ 11,320
Yield
Held-to-maturity, due in one year or less (as a percent)	1.72%
Held-to-maturity, due after one year through five years (as a percent)	4.90%
Held-to-maturity, due after five years through ten years (as a percent)	5.04%
Held-to-maturity, due after ten years (as a percent)	2.86%
Mortgage-backed securities—residential issued by government sponsored entities
Amortized Cost
Held-to-maturity	$ 332,686
Amortized Cost	332,686	350,126
Estimated Fair Value
Held-to-maturity	331,845
Total	$ 331,845	$ 348,621
Yield
Held-to-maturity (as a percent)	2.37%

Investment Securities - Securit

Investment Securities - Securities with Unrealized Losses Not Recognized in Income (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Estimated Fair Value
Estimated Fair Value, Less than 12 Months, Available-for-sale	$ 855,301	$ 683,749
Estimated Fair Value, 12 Months or Longer, Available-for-sale	0	8,412
Total, Estimated Fair Value, Available-for-sale	855,301	692,161
Unrealized Losses
Unrealized Losses, Less than 12 Months, Available-for-sale	17,692	17,318
Unrealized Losses,12 Months or Longer, Available-for-sale	0	187
Total, Unrealized Losses, Available-for-sale	17,692	17,505
Estimated Fair Value
Estimated Fair Value, Less than 12 Months, Held-to-maturity	282,799	312,495
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	37,331	36,606
Total, Estimated Fair Value, Held-to-maturity	320,130	349,101
Unrealized Losses
Unrealized Losses, Less than 12 Months, Held-to-maturity	5,937	7,387
Unrealized Losses, 12 Months or Longer, Held-to-maturity	1,038	2,262
Total, Unrealized Losses, Held-to-Maturity	6,975	9,649
Corporate bonds
Estimated Fair Value
Estimated Fair Value, Less than 12 Months, Available-for-sale	20,396	0
Estimated Fair Value, 12 Months or Longer, Available-for-sale	0	8,412
Total, Estimated Fair Value, Available-for-sale	20,396	8,412
Unrealized Losses
Unrealized Losses, Less than 12 Months, Available-for-sale	143	0
Unrealized Losses,12 Months or Longer, Available-for-sale	0	187
Total, Unrealized Losses, Available-for-sale	143	187
State and political subdivisions—tax exempt
Estimated Fair Value
Estimated Fair Value, Less than 12 Months, Available-for-sale	11,162	11,077
Estimated Fair Value, 12 Months or Longer, Available-for-sale	0	0
Total, Estimated Fair Value, Available-for-sale	11,162	11,077
Unrealized Losses
Unrealized Losses, Less than 12 Months, Available-for-sale	706	794
Unrealized Losses,12 Months or Longer, Available-for-sale	0	0
Total, Unrealized Losses, Available-for-sale	706	794
Mortgage-backed securities—residential issued by government sponsored entities
Estimated Fair Value
Estimated Fair Value, Less than 12 Months, Available-for-sale	823,743	672,672
Estimated Fair Value, 12 Months or Longer, Available-for-sale	0	0
Total, Estimated Fair Value, Available-for-sale	823,743	672,672
Unrealized Losses
Unrealized Losses, Less than 12 Months, Available-for-sale	16,843	16,524
Unrealized Losses,12 Months or Longer, Available-for-sale	0	0
Total, Unrealized Losses, Available-for-sale	16,843	16,524
U.S. Government agencies
Estimated Fair Value
Estimated Fair Value, Less than 12 Months, Held-to-maturity	10,790	11,311
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	0	0
Total, Estimated Fair Value, Held-to-maturity	10,790	11,311
Unrealized Losses
Unrealized Losses, Less than 12 Months, Held-to-maturity	333	402
Unrealized Losses, 12 Months or Longer, Held-to-maturity	0	0
Total, Unrealized Losses, Held-to-Maturity	333	402
Corporate bonds
Estimated Fair Value
Estimated Fair Value, Less than 12 Months, Held-to-maturity	14,975	24,629
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	29,325	28,112
Total, Estimated Fair Value, Held-to-maturity	44,300	52,741
Unrealized Losses
Unrealized Losses, Less than 12 Months, Held-to-maturity	25	371
Unrealized Losses, 12 Months or Longer, Held-to-maturity	713	1,930
Total, Unrealized Losses, Held-to-Maturity	738	2,301
Mortgage-backed securities—residential issued by government sponsored entities
Estimated Fair Value
Estimated Fair Value, Less than 12 Months, Held-to-maturity	257,034	276,555
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	8,006	8,494
Total, Estimated Fair Value, Held-to-maturity	265,040	285,049
Unrealized Losses
Unrealized Losses, Less than 12 Months, Held-to-maturity	5,579	6,614
Unrealized Losses, 12 Months or Longer, Held-to-maturity	325	332
Total, Unrealized Losses, Held-to-Maturity	$ 5,904	$ 6,946

Loans - Major Classifications o

Loans - Major Classifications of Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 7,511,955	$ 7,406,192
Total commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,811,661	1,716,050
Total commercial real estate \| Non-owner occupied commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,187,344	1,130,883
Total commercial real estate \| Other commercial construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	350,401	327,622
Total commercial real estate \| Multifamily commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	115,996	117,515
Total commercial real estate \| 1-4 family residential construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	157,920	140,030
Total commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,756,914	2,790,279
Total commercial \| Owner occupied commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,313,086	1,321,405
Total commercial \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,443,828	1,468,874
Total consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,711,971	2,671,433
Total consumer \| 1-4 family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,787,097	1,714,702
Total consumer \| Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	502,099	507,759
Total consumer \| Other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	422,775	448,972
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 231,409	$ 228,430

Loans - Additional Information

Loans - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 4,980	$ 12,874
Deferred loan origination costs	16,400	15,500
Loans receivable	7,511,955	7,406,192
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	231,409	228,430
Other \| Farm land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	43,500	41,900
Other \| State and political subdivisions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	151,600	149,000
Other \| Deposit customer overdraft
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,400	1,600
Total commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,811,661	$ 1,716,050
Analysis of loans individually by classification of credit risk, exceeding	$ 500

Loans - Roll Forward of Accreta

Loans - Roll Forward of Accretable Yield (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accretable Yield
Balance at beginning of period	$ 161,639	$ 208,844
Accretion of income	(18,783)	(20,843)
Reclassification from nonaccretable difference	16,357	14,937
Other	(6,559)	(7,873)
Balance at end of period	152,654	195,065
Nonaccretable Difference
Nonaccretable difference, balance at the end of the period	$ 127,657	$ 134,060

Loans - Major Categories of Loa

Loans - Major Categories of Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 7,511,955	$ 7,406,192
Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	886,273	936,325
New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	5,123,345	4,914,477
Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,502,337	1,555,390
Total commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,811,661	1,716,050
Total commercial real estate \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	313,379	322,519
Total commercial real estate \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,164,021	1,046,040
Total commercial real estate \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	334,261	347,491
Total commercial real estate \| Non-owner occupied commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,187,344	1,130,883
Total commercial real estate \| Non-owner occupied commercial real estate \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	227,260	229,535
Total commercial real estate \| Non-owner occupied commercial real estate \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	744,502	680,044
Total commercial real estate \| Non-owner occupied commercial real estate \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	215,582	221,304
Total commercial real estate \| Other commercial construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	350,401	327,622
Total commercial real estate \| Other commercial construction and land \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	65,487	71,888
Total commercial real estate \| Other commercial construction and land \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	208,508	182,486
Total commercial real estate \| Other commercial construction and land \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	76,406	73,248
Total commercial real estate \| Multifamily commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	115,996	117,515
Total commercial real estate \| Multifamily commercial real estate \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	20,319	20,713
Total commercial real estate \| Multifamily commercial real estate \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	79,411	77,694
Total commercial real estate \| Multifamily commercial real estate \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	16,266	19,108
Total commercial real estate \| 1-4 family residential construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	157,920	140,030
Total commercial real estate \| 1-4 family residential construction and land \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	313	383
Total commercial real estate \| 1-4 family residential construction and land \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	131,600	105,816
Total commercial real estate \| 1-4 family residential construction and land \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	26,007	33,831
Total commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,756,914	2,790,279
Total commercial \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	252,917	268,834
Total commercial \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,181,019	2,184,969
Total commercial \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	322,978	336,476
Total commercial \| Owner occupied commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,313,086	1,321,405
Total commercial \| Owner occupied commercial real estate \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	169,419	179,466
Total commercial \| Owner occupied commercial real estate \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	910,444	901,957
Total commercial \| Owner occupied commercial real estate \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	233,223	239,982
Total commercial \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,443,828	1,468,874
Total commercial \| Commercial and industrial \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	83,498	89,368
Total commercial \| Commercial and industrial \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,270,575	1,283,012
Total commercial \| Commercial and industrial \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	89,755	96,494
Total consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,711,971	2,671,433
Total consumer \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	290,957	312,157
Total consumer \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,584,123	1,497,629
Total consumer \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	836,891	861,647
Total consumer \| 1-4 family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,787,097	1,714,702
Total consumer \| 1-4 family residential \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	200,159	214,959
Total consumer \| 1-4 family residential \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,089,469	994,323
Total consumer \| 1-4 family residential \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	497,469	505,420
Total consumer \| Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	502,099	507,759
Total consumer \| Home equity loans \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	63,649	66,783
Total consumer \| Home equity loans \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	179,315	172,883
Total consumer \| Home equity loans \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	259,135	268,093
Total consumer \| Other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	422,775	448,972
Total consumer \| Other consumer loans \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	27,149	30,415
Total consumer \| Other consumer loans \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	315,339	330,423
Total consumer \| Other consumer loans \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	80,287	88,134
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	231,409	228,430
Other \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	29,020	32,815
Other \| New, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	194,182	185,839
Other \| Acquired, non-PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 8,207	$ 9,776

Loans - Aging of the Recorded I

Loans - Aging of the Recorded Investment in Past Due Loans, Based on Contractual Terms (Detail) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net		$ 7,463,084	$ 7,350,253
Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	18,758	26,953
Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		13,608	11,449
Loans, net		20,560	24,394
30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	7,316	11,047
30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		6,952	12,945
Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	11,442	15,906
Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total commercial real estate \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	2,001	2,877
Total commercial real estate \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		2,516	2,788
Loans, net		2,636	2,959
Total commercial real estate \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	289	550
Total commercial real estate \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		120	171
Total commercial real estate \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	1,712	2,327
Total commercial real estate \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total commercial real estate \| Non-owner occupied commercial real estate \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	413	1,130
Total commercial real estate \| Non-owner occupied commercial real estate \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		2,324	2,584
Loans, net		2,324	2,584
Total commercial real estate \| Non-owner occupied commercial real estate \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	13	0
Total commercial real estate \| Non-owner occupied commercial real estate \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total commercial real estate \| Non-owner occupied commercial real estate \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	400	1,130
Total commercial real estate \| Non-owner occupied commercial real estate \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total commercial real estate \| Other commercial construction and land \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	1,156	1,327
Total commercial real estate \| Other commercial construction and land \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		192	204
Loans, net		312	227
Total commercial real estate \| Other commercial construction and land \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	276	550
Total commercial real estate \| Other commercial construction and land \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		120	23
Total commercial real estate \| Other commercial construction and land \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	880	777
Total commercial real estate \| Other commercial construction and land \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total commercial real estate \| Multifamily commercial real estate \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	432	420
Total commercial real estate \| Multifamily commercial real estate \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		0	0
Loans, net		0	0
Total commercial real estate \| Multifamily commercial real estate \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	0	0
Total commercial real estate \| Multifamily commercial real estate \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total commercial real estate \| Multifamily commercial real estate \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	432	420
Total commercial real estate \| Multifamily commercial real estate \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total commercial real estate \| 1-4 family residential construction and land \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	0	0
Total commercial real estate \| 1-4 family residential construction and land \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		0	0
Loans, net		0	148
Total commercial real estate \| 1-4 family residential construction and land \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	0	0
Total commercial real estate \| 1-4 family residential construction and land \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	148
Total commercial real estate \| 1-4 family residential construction and land \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	0	0
Total commercial real estate \| 1-4 family residential construction and land \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total commercial \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	5,925	6,721
Total commercial \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		5,203	3,648
Loans, net		5,206	6,450
Total commercial \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	1,491	2,436
Total commercial \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		3	2,802
Total commercial \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	4,434	4,285
Total commercial \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total commercial \| Owner occupied commercial real estate \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	5,259	5,620
Total commercial \| Owner occupied commercial real estate \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		4,443	2,950
Loans, net		4,443	5,583
Total commercial \| Owner occupied commercial real estate \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	1,158	1,844
Total commercial \| Owner occupied commercial real estate \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	2,633
Total commercial \| Owner occupied commercial real estate \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	4,101	3,776
Total commercial \| Owner occupied commercial real estate \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total commercial \| Commercial and industrial \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	666	1,101
Total commercial \| Commercial and industrial \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		760	698
Loans, net		763	867
Total commercial \| Commercial and industrial \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	333	592
Total commercial \| Commercial and industrial \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		3	169
Total commercial \| Commercial and industrial \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	333	509
Total commercial \| Commercial and industrial \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total consumer \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	9,857	16,552
Total consumer \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		5,889	5,013
Loans, net		12,718	14,985
Total consumer \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	5,242	7,974
Total consumer \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		6,829	9,972
Total consumer \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	4,615	8,578
Total consumer \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total consumer \| 1-4 family residential \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	4,512	10,348
Total consumer \| 1-4 family residential \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		968	1,048
Loans, net		1,593	1,541
Total consumer \| 1-4 family residential \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	1,920	4,288
Total consumer \| 1-4 family residential \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		625	493
Total consumer \| 1-4 family residential \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	2,592	6,060
Total consumer \| 1-4 family residential \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total consumer \| Home equity loans \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	1,984	2,598
Total consumer \| Home equity loans \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		2,246	1,568
Loans, net		3,596	2,904
Total consumer \| Home equity loans \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	855	1,128
Total consumer \| Home equity loans \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		1,350	1,336
Total consumer \| Home equity loans \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	1,129	1,470
Total consumer \| Home equity loans \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Total consumer \| Other consumer loans \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	3,361	3,606
Total consumer \| Other consumer loans \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		2,675	2,397
Loans, net		7,529	10,540
Total consumer \| Other consumer loans \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	2,467	2,558
Total consumer \| Other consumer loans \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		4,854	8,143
Total consumer \| Other consumer loans \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	894	1,048
Total consumer \| Other consumer loans \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Other \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	[1]	0	0
Loans, net	[1]	975	803
Other \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		0	0
Loans, net		0	0
Other \| 30-89 Days Past Due \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	294	87
Other \| 30-89 Days Past Due \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		0	0
Other \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Purchased Credit- Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	[1]	681	716
Other \| Greater than 90 Days Past Due and Still Accruing/Accreting \| Non-purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans		$ 0	$ 0

[1]	Pooled PCI loans are not classified as nonaccrual as they are considered to be accruing because their interest income relates to the accretable yield recognized under accounting for purchased credit-impaired loans and not to contractual interest payments.

Loans - Loans, Excluding PCI Lo

Loans - Loans, Excluding PCI Loans by Internal Ratings (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total	$ 6,625,682	$ 6,469,867
Pass
Financing Receivable, Recorded Investment [Line Items]
Total	6,542,049	6,409,504
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	46,766	29,131
Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	23,259	19,783
Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	13,608	11,449
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total	1,498,282	1,393,531
Total commercial real estate \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	1,492,771	1,388,373
Total commercial real estate \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	2,795	1,251
Total commercial real estate \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	200	1,119
Total commercial real estate \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	2,516	2,788
Total commercial real estate \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate \| Non-owner occupied commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total	960,084	901,348
Total commercial real estate \| Non-owner occupied commercial real estate \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	954,965	896,394
Total commercial real estate \| Non-owner occupied commercial real estate \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	2,795	1,251
Total commercial real estate \| Non-owner occupied commercial real estate \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	0	1,119
Total commercial real estate \| Non-owner occupied commercial real estate \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	2,324	2,584
Total commercial real estate \| Non-owner occupied commercial real estate \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate \| Other commercial construction and land
Financing Receivable, Recorded Investment [Line Items]
Total	284,914	255,734
Total commercial real estate \| Other commercial construction and land \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	284,722	255,530
Total commercial real estate \| Other commercial construction and land \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate \| Other commercial construction and land \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate \| Other commercial construction and land \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	192	204
Total commercial real estate \| Other commercial construction and land \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate \| Multifamily commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total	95,677	96,802
Total commercial real estate \| Multifamily commercial real estate \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	95,477	96,802
Total commercial real estate \| Multifamily commercial real estate \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate \| Multifamily commercial real estate \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	200	0
Total commercial real estate \| Multifamily commercial real estate \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate \| Multifamily commercial real estate \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate \| 1-4 family residential construction and land
Financing Receivable, Recorded Investment [Line Items]
Total	157,607	139,647
Total commercial real estate \| 1-4 family residential construction and land \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	157,607	139,647
Total commercial real estate \| 1-4 family residential construction and land \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate \| 1-4 family residential construction and land \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate \| 1-4 family residential construction and land \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial real estate \| 1-4 family residential construction and land \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial
Financing Receivable, Recorded Investment [Line Items]
Total	2,503,997	2,521,445
Total commercial \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	2,436,717	2,475,866
Total commercial \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	42,765	26,919
Total commercial \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	19,312	15,012
Total commercial \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	5,203	3,648
Total commercial \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial \| Owner occupied commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total	1,143,667	1,141,939
Total commercial \| Owner occupied commercial real estate \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	1,108,754	1,124,285
Total commercial \| Owner occupied commercial real estate \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	26,546	10,210
Total commercial \| Owner occupied commercial real estate \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	3,924	4,494
Total commercial \| Owner occupied commercial real estate \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	4,443	2,950
Total commercial \| Owner occupied commercial real estate \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total commercial \| Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total	1,360,330	1,379,506
Total commercial \| Commercial and industrial \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	1,327,963	1,351,581
Total commercial \| Commercial and industrial \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	16,219	16,709
Total commercial \| Commercial and industrial \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	15,388	10,518
Total commercial \| Commercial and industrial \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	760	698
Total commercial \| Commercial and industrial \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total consumer
Financing Receivable, Recorded Investment [Line Items]
Total	2,421,014	2,359,276
Total consumer \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	2,410,172	2,349,650
Total consumer \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	1,206	961
Total consumer \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	3,747	3,652
Total consumer \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	5,889	5,013
Total consumer \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total consumer \| 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Total	1,586,938	1,499,743
Total consumer \| 1-4 family residential \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	1,582,693	1,495,653
Total consumer \| 1-4 family residential \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	1,146	899
Total consumer \| 1-4 family residential \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	2,131	2,143
Total consumer \| 1-4 family residential \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	968	1,048
Total consumer \| 1-4 family residential \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total consumer \| Home equity loans
Financing Receivable, Recorded Investment [Line Items]
Total	438,450	440,976
Total consumer \| Home equity loans \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	434,571	437,880
Total consumer \| Home equity loans \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	60	62
Total consumer \| Home equity loans \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	1,573	1,466
Total consumer \| Home equity loans \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	2,246	1,568
Total consumer \| Home equity loans \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total consumer \| Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total	395,626	418,557
Total consumer \| Other consumer loans \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	392,908	416,117
Total consumer \| Other consumer loans \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Total consumer \| Other consumer loans \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	43	43
Total consumer \| Other consumer loans \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	2,675	2,397
Total consumer \| Other consumer loans \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Other
Financing Receivable, Recorded Investment [Line Items]
Total	202,389	195,615
Other \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total	202,389	195,615
Other \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Other \| Substandard Accruing
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Other \| Substandard Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Total	0	0
Other \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total	$ 0	$ 0

Allowance for Loan and Lease 54

Allowance for Loan and Lease Losses - Allowance for Loan and Lease Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 43,065	$ 45,034
Provision (reversal) for loan losses	3,392	1,375
Loans charged off	(3,183)	(1,824)
Recoveries of non-PCI loans previously charged-off	617	678
Balance, end of period	43,891	45,263
Non-PCI Loans
Allowance for Loan and Lease Losses [Roll Forward]
Provision (reversal) for loan losses	3,206	1,384
Loans charged off	(3,183)	(1,824)
Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	23,015	24,488
Provision (reversal) for loan losses	186	(9)
Loans charged off	0	0
Recoveries of non-PCI loans previously charged-off	0	0
Balance, end of period	$ 23,201	$ 24,479

Allowance for Loan and Lease 55

Allowance for Loan and Lease Losses - Roll Forward of Allowance for Loan and Lease Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 43,065	$ 45,034
Provision/ (Reversals)	3,392	1,375
Net(Charge-offs)/ Recoveries	(2,566)	(1,146)
Balance, end of period	43,891	45,263
Total commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	15,518	15,978
Provision/ (Reversals)	298	345
Net(Charge-offs)/ Recoveries	5	11
Balance, end of period	15,821	16,334
Total commercial real estate \| Non-owner occupied commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	1,989	1,598
Provision/ (Reversals)	(749)	66
Net(Charge-offs)/ Recoveries	1	7
Balance, end of period	1,241	1,671
Total commercial real estate \| Other commercial construction and land
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	12,692	12,919
Provision/ (Reversals)	974	274
Net(Charge-offs)/ Recoveries	2	3
Balance, end of period	13,668	13,196
Total commercial real estate \| Multifamily commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	171	186
Provision/ (Reversals)	0	(4)
Net(Charge-offs)/ Recoveries	0	0
Balance, end of period	171	182
Total commercial real estate \| 1-4 family residential construction and land
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	666	1,275
Provision/ (Reversals)	73	9
Net(Charge-offs)/ Recoveries	2	1
Balance, end of period	741	1,285
Total commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	10,906	11,132
Provision/ (Reversals)	(290)	727
Net(Charge-offs)/ Recoveries	(212)	(43)
Balance, end of period	10,404	11,816
Total commercial \| Owner occupied commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	1,397	1,505
Provision/ (Reversals)	87	262
Net(Charge-offs)/ Recoveries	2	(80)
Balance, end of period	1,486	1,687
Total commercial \| Commercial and industrial loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	9,509	9,627
Provision/ (Reversals)	(377)	465
Net(Charge-offs)/ Recoveries	(214)	37
Balance, end of period	8,918	10,129
Total consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	16,292	17,661
Provision/ (Reversals)	3,101	(67)
Net(Charge-offs)/ Recoveries	(2,024)	(783)
Balance, end of period	17,369	16,811
Total consumer \| 1-4 family residential
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	9,188	11,057
Provision/ (Reversals)	(308)	(688)
Net(Charge-offs)/ Recoveries	0	5
Balance, end of period	8,880	10,374
Total consumer \| Home equity loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	1,214	1,853
Provision/ (Reversals)	(179)	(370)
Net(Charge-offs)/ Recoveries	44	112
Balance, end of period	1,079	1,595
Total consumer \| Other consumer loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	5,890	4,751
Provision/ (Reversals)	3,588	991
Net(Charge-offs)/ Recoveries	(2,068)	(900)
Balance, end of period	7,410	4,842
Other
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	349	263
Provision/ (Reversals)	283	370
Net(Charge-offs)/ Recoveries	(335)	(331)
Balance, end of period	$ 297	$ 302

Allowance for Loan and Lease 56

Allowance for Loan and Lease Losses - Roll forward of Allowance for Loan and Lease Losses for PCI and Non-PCI Loans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 43,065	$ 45,034
Charge-offs	(3,183)	(1,824)
Recoveries	617	678
Net Charge Offs And Recoveries	(2,566)	(1,146)
Provision (reversal) for loan losses	3,392	1,375
Balance, end of period	43,891	45,263
Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	23,015	24,488
Charge-offs	0	0
Recoveries	0	0
Net Charge Offs And Recoveries	0	0
Provision (reversal) for loan losses	186	(9)
Balance, end of period	23,201	24,479
Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	20,050	20,546
Charge-offs	(3,183)	(1,824)
Recoveries	617	678
Net Charge Offs And Recoveries	(2,566)	(1,146)
Provision (reversal) for loan losses	3,206	1,384
Balance, end of period	20,690	20,784
Total commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	15,518	15,978
Charge-offs	0	(1)
Recoveries	5	12
Provision (reversal) for loan losses	298	345
Balance, end of period	15,821	16,334
Total commercial real estate \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	320	472
Total commercial real estate \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	(1)
Recoveries	5	12
Provision (reversal) for loan losses	(22)	(127)
Total commercial real estate \| Non-owner occupied commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	1,989	1,598
Charge-offs	0	(1)
Recoveries	1	8
Provision (reversal) for loan losses	(749)	66
Balance, end of period	1,241	1,671
Total commercial real estate \| Non-owner occupied commercial real estate \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	(778)	117
Total commercial real estate \| Non-owner occupied commercial real estate \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	(1)
Recoveries	1	8
Provision (reversal) for loan losses	29	(51)
Total commercial real estate \| Other commercial construction and land
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	12,692	12,919
Charge-offs	0	0
Recoveries	2	3
Provision (reversal) for loan losses	974	274
Balance, end of period	13,668	13,196
Total commercial real estate \| Other commercial construction and land \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	1,124	377
Total commercial real estate \| Other commercial construction and land \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	2	3
Provision (reversal) for loan losses	(150)	(103)
Total commercial real estate \| Multifamily commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	171	186
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	0	(4)
Balance, end of period	171	182
Total commercial real estate \| Multifamily commercial real estate \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	(26)	10
Total commercial real estate \| Multifamily commercial real estate \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	26	(14)
Total commercial real estate \| 1-4 family residential construction and land
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	666	1,275
Charge-offs	0	0
Recoveries	2	1
Provision (reversal) for loan losses	73	9
Balance, end of period	741	1,285
Total commercial real estate \| 1-4 family residential construction and land \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	0	(32)
Total commercial real estate \| 1-4 family residential construction and land \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	2	1
Provision (reversal) for loan losses	73	41
Total commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	10,906	11,132
Charge-offs	(246)	(81)
Recoveries	34	38
Provision (reversal) for loan losses	(290)	727
Balance, end of period	10,404	11,816
Total commercial \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	252	283
Total commercial \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	(246)	(81)
Recoveries	34	38
Provision (reversal) for loan losses	(542)	444
Total commercial \| Owner occupied commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	1,397	1,505
Charge-offs	(6)	(80)
Recoveries	8	0
Provision (reversal) for loan losses	87	262
Balance, end of period	1,486	1,687
Total commercial \| Owner occupied commercial real estate \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	(59)	124
Total commercial \| Owner occupied commercial real estate \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	(6)	(80)
Recoveries	8	0
Provision (reversal) for loan losses	146	138
Total commercial \| Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	9,509	9,627
Charge-offs	(240)	(1)
Recoveries	26	38
Provision (reversal) for loan losses	(377)	465
Balance, end of period	8,918	10,129
Total commercial \| Commercial and industrial \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	311	159
Total commercial \| Commercial and industrial \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	(240)	(1)
Recoveries	26	38
Provision (reversal) for loan losses	(688)	306
Total consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	16,292	17,661
Charge-offs	(2,363)	(1,190)
Recoveries	339	407
Provision (reversal) for loan losses	3,101	(67)
Balance, end of period	17,369	16,811
Total consumer \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	(353)	(796)
Total consumer \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	(2,363)	(1,190)
Recoveries	339	407
Provision (reversal) for loan losses	3,454	729
Total consumer \| 1-4 family residential
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	9,188	11,057
Charge-offs	(2)	0
Recoveries	2	5
Provision (reversal) for loan losses	(308)	(688)
Balance, end of period	8,880	10,374
Total consumer \| 1-4 family residential \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	(226)	(588)
Total consumer \| 1-4 family residential \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	(2)	0
Recoveries	2	5
Provision (reversal) for loan losses	(82)	(100)
Total consumer \| Home equity loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	1,214	1,853
Charge-offs	(39)	(61)
Recoveries	83	173
Provision (reversal) for loan losses	(179)	(370)
Balance, end of period	1,079	1,595
Total consumer \| Home equity loans \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	(166)	(215)
Total consumer \| Home equity loans \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	(39)	(61)
Recoveries	83	173
Provision (reversal) for loan losses	(13)	(155)
Total consumer \| Other consumer loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	5,890	4,751
Charge-offs	(2,322)	(1,129)
Recoveries	254	229
Provision (reversal) for loan losses	3,588	991
Balance, end of period	7,410	4,842
Total consumer \| Other consumer loans \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	39	7
Total consumer \| Other consumer loans \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	(2,322)	(1,129)
Recoveries	254	229
Provision (reversal) for loan losses	3,549	984
Other
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	349	263
Charge-offs	(574)	(552)
Recoveries	239	221
Provision (reversal) for loan losses	283	370
Balance, end of period	297	302
Other \| Purchased Credit- Impaired
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Provision (reversal) for loan losses	(33)	32
Other \| Non-purchased credit impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	(574)	(552)
Recoveries	239	221
Provision (reversal) for loan losses	$ 316	$ 338

Allowance for Loan and Lease 57

Allowance for Loan and Lease Losses - Allowance for Loan and Lease Losses and Recorded Investment in Loans by Class of Loans and by Impairment Evaluation (Detail) - USD ($) $ in Thousands	Mar. 31, 2017		Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	$ 6,625,682		$ 6,469,867
Loans collectively evaluated for impairment, unamortized purchase discounts (Premium)	18,500		20,000
Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	23,201		23,015
Loans, collectively evaluated for impairment	1,400,000		1,600,000
Loans, purchase credit-impaired	886,273		936,325
Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	283		274
Allowance for loan and lease losses, collectively evaluated for impairment	20,407		19,776
Loans, individually evaluated for impairment	24,840		25,157
Loans, collectively evaluated for impairment	6,595,862	[1]	6,431,836	[2]
Total commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	2,503,997		2,521,445
Total commercial \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	3,486		3,234
Loans, purchase credit-impaired	252,917		268,834
Total commercial \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	1		7
Allowance for loan and lease losses, collectively evaluated for impairment	6,917		7,665
Loans, individually evaluated for impairment	18,047		18,406
Loans, collectively evaluated for impairment	2,485,950	[1]	2,503,039	[2]
Total commercial \| Owner occupied commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	1,143,667		1,141,939
Total commercial \| Owner occupied commercial real estate \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	196		255
Loans, purchase credit-impaired	169,419		179,466
Total commercial \| Owner occupied commercial real estate \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	1		1
Allowance for loan and lease losses, collectively evaluated for impairment	1,289		1,141
Loans, individually evaluated for impairment	8,670		8,858
Loans, collectively evaluated for impairment	1,134,997	[1]	1,133,081	[2]
Total commercial \| Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	1,360,330		1,379,506
Total commercial \| Commercial and industrial \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	3,290		2,979
Loans, purchase credit-impaired	83,498		89,368
Total commercial \| Commercial and industrial \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	0		6
Allowance for loan and lease losses, collectively evaluated for impairment	5,628		6,524
Loans, individually evaluated for impairment	9,377		9,548
Loans, collectively evaluated for impairment	1,350,953	[1]	1,369,958	[2]
Total commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	1,498,282		1,393,531
Total commercial real estate \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	12,466		12,146
Loans, purchase credit-impaired	313,379		322,519
Total commercial real estate \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	22		20
Allowance for loan and lease losses, collectively evaluated for impairment	3,333		3,352
Loans, individually evaluated for impairment	2,920		2,944
Loans, collectively evaluated for impairment	1,495,362	[1]	1,390,587	[2]
Total commercial real estate \| Non-owner occupied commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	960,084		901,348
Total commercial real estate \| Non-owner occupied commercial real estate \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	252		1,030
Loans, purchase credit-impaired	227,260		229,535
Total commercial real estate \| Non-owner occupied commercial real estate \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	0		0
Allowance for loan and lease losses, collectively evaluated for impairment	989		959
Loans, individually evaluated for impairment	2,797		2,835
Loans, collectively evaluated for impairment	957,287	[1]	898,513	[2]
Total commercial real estate \| Other commercial construction and land
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	284,914		255,734
Total commercial real estate \| Other commercial construction and land \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	12,118		10,994
Loans, purchase credit-impaired	65,487		71,888
Total commercial real estate \| Other commercial construction and land \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	22		20
Allowance for loan and lease losses, collectively evaluated for impairment	1,528		1,678
Loans, individually evaluated for impairment	123		109
Loans, collectively evaluated for impairment	284,791	[1]	255,625	[2]
Total commercial real estate \| Multifamily commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	95,677		96,802
Total commercial real estate \| Multifamily commercial real estate \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	96		122
Loans, purchase credit-impaired	20,319		20,713
Total commercial real estate \| Multifamily commercial real estate \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	0		0
Allowance for loan and lease losses, collectively evaluated for impairment	75		49
Loans, individually evaluated for impairment	0		0
Loans, collectively evaluated for impairment	95,677	[1]	96,802	[2]
Total commercial real estate \| 1-4 family residential construction and land
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	157,607		139,647
Total commercial real estate \| 1-4 family residential construction and land \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	0		0
Loans, purchase credit-impaired	313		383
Total commercial real estate \| 1-4 family residential construction and land \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	0		0
Allowance for loan and lease losses, collectively evaluated for impairment	741		666
Loans, individually evaluated for impairment	0		0
Loans, collectively evaluated for impairment	157,607	[1]	139,647	[2]
Total consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	2,421,014		2,359,276
Total consumer \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	7,236		7,589
Loans, purchase credit-impaired	290,957		312,157
Total consumer \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	260		247
Allowance for loan and lease losses, collectively evaluated for impairment	9,873		8,456
Loans, individually evaluated for impairment	3,873		3,807
Loans, collectively evaluated for impairment	2,412,161	[1]	2,342,595	[2]
Total consumer \| 1-4 family residential
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	1,586,938		1,499,743
Total consumer \| 1-4 family residential \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	6,705		6,931
Loans, purchase credit-impaired	200,159		214,959
Total consumer \| 1-4 family residential \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	122		121
Allowance for loan and lease losses, collectively evaluated for impairment	2,053		2,136
Loans, individually evaluated for impairment	1,969		1,963
Loans, collectively evaluated for impairment	1,579,989	[1]	1,484,906	[2]
Total consumer \| Home equity loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	438,450		440,976
Total consumer \| Home equity loans \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	412		578
Loans, purchase credit-impaired	63,649		66,783
Total consumer \| Home equity loans \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	126		113
Allowance for loan and lease losses, collectively evaluated for impairment	541		523
Loans, individually evaluated for impairment	1,451		1,392
Loans, collectively evaluated for impairment	436,999	[1]	439,584	[2]
Total consumer \| Other consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	395,626		418,557
Total consumer \| Other consumer loans \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	119		80
Loans, purchase credit-impaired	27,149		30,415
Total consumer \| Other consumer loans \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	12		13
Allowance for loan and lease losses, collectively evaluated for impairment	7,279		5,797
Loans, individually evaluated for impairment	453		452
Loans, collectively evaluated for impairment	395,173	[1]	418,105	[2]
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, purchase credit-impaired	202,389		195,615
Other \| Purchased Credit- Impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, purchase credit-impaired	13		46
Loans, purchase credit-impaired	29,020		32,815
Other \| Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, individually evaluated for impairment	0		0
Allowance for loan and lease losses, collectively evaluated for impairment	284		303
Loans, individually evaluated for impairment	0		0
Loans, collectively evaluated for impairment	$ 202,389	[1]	$ 195,615	[2]

[1]	Loans collectively evaluated for impairment include $1.4 billion of acquired loans which are presented net of unamortized purchase discounts of $18.5 million.
[2]	Loans collectively evaluated for impairment include $1.6 billion of acquired loans which are presented net of unamortized purchase discounts of $20.0 million.

Allowance for Loan and Lease 58

Allowance for Loan and Lease Losses - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Receivables [Abstract]
Loans modified in TDRs with recorded investments	$ 2.4	$ 1.4	$ 2.7

Other Real Estate Owned - Addit

Other Real Estate Owned - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Banking and Thrift [Abstract]
Proceeds from sales of OREO	$ 4,920	$ 7,072
Net gain on sales of OREO	$ 308	$ 679

Other Real Estate Owned (Detail

Other Real Estate Owned (Detail) - USD ($) $ in Thousands	3 Months Ended
Other Real Estate Owned (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Other Real Estate [Roll Forward]
Balance, beginning of period	$ 53,482	$ 52,776
Real estate acquired from borrowers and transfers from other assets	2,428	2,588
Valuation allowance	(247)	(467)
Properties sold	(4,613)	(6,392)
Balance, end of period	$ 51,050	$ 48,505

Federal Home Loan Bank Advanc61

Federal Home Loan Bank Advances and Short-Term Borrowings - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Short-term Debt [Line Items]
Securities sold under repurchase agreements	$ 20,400	$ 18,000
Available-for-sale securities pledged as collateral	27,000	27,600
Borrowings related to cash received from counterparties as mark-to-market exposure	700	1,200
Amounts of eligible collateral provided for incremental borrowing	552,700	415,900
Federal Home Loan Bank advances	490,650	545,701
Letter of Credit
Short-term Debt [Line Items]
Federal Home Loan Bank advances	15,300	15,400
Letter of credit used as collateral in lieu of pledging securities	$ 15,000	$ 15,200

Federal Home Loan Bank Advanc62

Federal Home Loan Bank Advances and Short-Term Borrowings - Federal Home Loan Bank Advance Owed (Detail) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount		$ 490,650	$ 545,701
FHLB Maturity Date January 20, 2017
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount			$ 25,000
Interest rate (as a percent)			0.63%
FHLB Maturity Date May 19, 2017
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount		$ 50,000	$ 155,000
Interest rate (as a percent)		1.07%	0.80%
FHLB Maturity Date November 6, 2017
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount		$ 230	$ 271
Interest rate (as a percent)		0.50%	0.50%
FHLB Maturity Date November 20, 2017
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount	[1]	$ 50,000	$ 50,000
Interest rate (as a percent)	[1]	0.87%	0.65%
FHLB Maturity Date November 20, 2017 \| 1 Month FRC
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest rate, basis points (as a percent)	[1]	0.02%
FHLB Maturity Date November 23, 2018
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount	[1]	$ 50,000	$ 50,000
Interest rate (as a percent)	[1]	0.91%	0.66%
FHLB Maturity Date November 23, 2018 \| 1 Month FRC
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest rate, basis points (as a percent)	[1]	0.02%
FHLB Maturity Date December 31, 2019
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount	[1]	$ 50,000	$ 50,000
Interest rate (as a percent)	[1]	0.92%	0.64%
FHLB Maturity Date December 31, 2019 \| 1 Month FRC
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest rate, basis points (as a percent)	[1]	0.02%
FHLB Maturity Date May 28, 2020
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount	[1]	$ 60,000	$ 60,000
Interest rate (as a percent)	[1]	0.92%	0.63%
FHLB Maturity Date May 28, 2020 \| 1 Month FRC
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest rate, basis points (as a percent)	[1]	0.02%
FHLB Maturity Date September, 20, 2021
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount	[1]	$ 80,000	$ 80,000
Interest rate (as a percent)	[1]	0.93%	0.71%
FHLB Maturity Date September, 20, 2021 \| 1 Month FRC
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest rate, basis points (as a percent)	[1]	0.08%
FHLB Maturity Date September, 29, 2021
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount	[1]	$ 75,000	$ 75,000
Interest rate (as a percent)	[1]	0.98%	0.71%
FHLB Maturity Date September, 29, 2021 \| 1 Month FRC
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest rate, basis points (as a percent)	[1]	0.08%
FHLB Maturity Date January 20, 2022
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount	[1]	$ 75,000
Interest rate (as a percent)	[1]	0.93%
FHLB Maturity Date January 20, 2022 \| 1 Month FRC
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest rate, basis points (as a percent)	[1]	0.08%
FHLB Maturity Date February 10, 2026
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Contractual Outstanding Amount		$ 420	$ 430
Interest rate (as a percent)		0.00%	0.00%

[1]	FRC = FHLB Fixed Rate Credit interest rate.

Long-Term Borrowings - Addition

Long-Term Borrowings - Additional Information (Detail)	3 Months Ended
Long-Term Borrowings - Additional Information (Detail)	Mar. 31, 2017trust_preferred_security
Debt Instrument [Line Items]
Period allowed for deferral of interest payment on the trust preferred securities (up to)	60 months
Trust Preferred Securities
Debt Instrument [Line Items]
Number of trust preferred securities acquired	14
Life of debt securities and trust preferred securities	30 years
Debt Securities
Debt Instrument [Line Items]
Life of debt securities and trust preferred securities	30 years

Long-Term Borrowings - Summary

Long-Term Borrowings - Summary of Subordinated Debentures (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Carrying Amount	$ 117,272,000	$ 116,456,000
3 Month LIBOR \| Subordinated debt due July 31, 2031
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	3.58%
3 Month LIBOR \| Subordinated debt due July 31, 2031
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	3.58%
3 Month LIBOR \| Subordinated debt due December 30, 2032
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	3.35%
3 Month LIBOR \| Subordinated debt due June 26, 2033
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	3.10%
3 Month LIBOR \| Subordinated debt due October 8, 2033
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	2.85%
3 Month LIBOR \| Subordinated debt due December 30, 2033
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	2.85%
3 Month LIBOR \| Subordinated debt due June 28, 2035
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	1.68%
3 Month LIBOR \| Subordinated debt due December 15, 2035
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	1.37%
3 Month LIBOR \| Subordinated debt due March 15, 2036
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	1.40%
3 Month LIBOR \| Subordinated debt due March 15, 2036
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	1.54%
3 Month LIBOR \| Subordinated debt due June 30, 2036
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	1.32%
3 Month LIBOR \| Subordinated debt due July 7, 2036
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	1.55%
3 Month LIBOR \| Subordinated debt due June 15, 2037
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	1.65%
3 Month LIBOR \| Subordinated debt due September 6, 2037
Debt Instrument [Line Items]
Interest Rate, Basis Points (as a percent)	1.43%
Subordinated Debt
Debt Instrument [Line Items]
Face Amount	$ 206,000,000
Carrying Amount	$ 117,272,000	116,456,000
Subordinated Debt \| Subordinated debt due July 31, 2031
Debt Instrument [Line Items]
Date of Offering	Jul. 31, 2001
Face Amount	$ 5,000,000
Carrying Amount	$ 4,034,000	4,018,000
Interest Rate (as a percent)	4.62%
Maturity Date	Jul. 31, 2031
Subordinated Debt \| Subordinated debt due July 31, 2031
Debt Instrument [Line Items]
Date of Offering	Jul. 31, 2001
Face Amount	$ 4,000,000
Carrying Amount	$ 2,848,000	2,831,000
Interest Rate (as a percent)	4.62%
Maturity Date	Jul. 31, 2031
Subordinated Debt \| Subordinated debt due December 30, 2032
Debt Instrument [Line Items]
Date of Offering	Dec. 20, 2002
Face Amount	$ 5,000,000
Carrying Amount	$ 3,561,000	3,544,000
Interest Rate (as a percent)	4.50%
Maturity Date	Dec. 30, 2032
Subordinated Debt \| Subordinated debt due June 26, 2033
Debt Instrument [Line Items]
Date of Offering	Jun. 26, 2003
Face Amount	$ 10,000,000
Carrying Amount	$ 6,260,000	6,231,000
Interest Rate (as a percent)	4.25%
Maturity Date	Jun. 26, 2033
Subordinated Debt \| Subordinated debt due October 8, 2033
Debt Instrument [Line Items]
Date of Offering	Sep. 25, 2003
Face Amount	$ 10,000,000
Carrying Amount	$ 6,862,000	6,823,000
Interest Rate (as a percent)	3.87%
Maturity Date	Oct. 8, 2033
Subordinated Debt \| Subordinated debt due December 30, 2033
Debt Instrument [Line Items]
Date of Offering	Dec. 30, 2003
Face Amount	$ 10,000,000
Carrying Amount	$ 6,049,000	6,020,000
Interest Rate (as a percent)	3.88%
Maturity Date	Dec. 30, 2033
Subordinated Debt \| Subordinated debt due June 28, 2035
Debt Instrument [Line Items]
Date of Offering	Jun. 28, 2005
Face Amount	$ 3,000,000
Carrying Amount	$ 1,710,000	1,697,000
Interest Rate (as a percent)	2.81%
Maturity Date	Jun. 28, 2035
Subordinated Debt \| Subordinated debt due December 15, 2035
Debt Instrument [Line Items]
Date of Offering	Nov. 4, 2005
Face Amount	$ 20,000,000
Carrying Amount	$ 10,178,000	10,085,000
Interest Rate (as a percent)	2.50%
Maturity Date	Dec. 15, 2035
Subordinated Debt \| Subordinated debt due March 15, 2036
Debt Instrument [Line Items]
Date of Offering	Dec. 22, 2005
Face Amount	$ 10,000,000
Carrying Amount	$ 4,897,000	4,863,000
Interest Rate (as a percent)	2.53%
Maturity Date	Mar. 15, 2036
Subordinated Debt \| Subordinated debt due March 15, 2036
Debt Instrument [Line Items]
Date of Offering	Dec. 28, 2005
Face Amount	$ 13,000,000
Carrying Amount	$ 7,163,000	7,107,000
Interest Rate (as a percent)	2.67%
Maturity Date	Mar. 15, 2036
Subordinated Debt \| Subordinated debt due June 30, 2036
Debt Instrument [Line Items]
Date of Offering	Apr. 27, 2006
Face Amount	$ 30,000,000
Carrying Amount	$ 14,953,000	14,816,000
Interest Rate (as a percent)	2.47%
Maturity Date	Jun. 30, 2036
Subordinated Debt \| Subordinated debt due July 7, 2036
Debt Instrument [Line Items]
Date of Offering	Jun. 23, 2006
Face Amount	$ 20,000,000
Carrying Amount	$ 12,169,000	12,092,000
Interest Rate (as a percent)	2.57%
Maturity Date	Jul. 7, 2036
Subordinated Debt \| Subordinated debt due June 15, 2037
Debt Instrument [Line Items]
Date of Offering	May 16, 2007
Face Amount	$ 56,000,000
Carrying Amount	$ 30,915,000	30,685,000
Interest Rate (as a percent)	2.78%
Maturity Date	Jun. 15, 2037
Subordinated Debt \| Subordinated debt due September 6, 2037
Debt Instrument [Line Items]
Date of Offering	Jun. 15, 2007
Face Amount	$ 10,000,000
Carrying Amount	$ 5,673,000	$ 5,644,000
Interest Rate (as a percent)	2.53%
Maturity Date	Sep. 6, 2037

Shareholders' Equity and Mini65

Shareholders' Equity and Minimum Regulatory Capital Requirements - Schedule of Minimum and Actual Ratios (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Tier 1 Leverage Capital
Adequately capitalized requirement tier 1 capital to average assets	$ 383,662	$ 360,513
Actual tier 1 capital to average assets	1,115,279	1,101,743
Tier 1 Common Equity Capital
Adequately capitalized requirement tier 1 common equity capital to risk-weighted assets	373,798	367,521
Actual tier 1 common equity capital to risk-weighted average assets	1,011,778	1,012,831
Tier 1 Risk-based Capital
Adequately capitalized requirement tier 1 capital to risk-weighted assets	498,397	490,028
Actual tier 1 capital to risk-weighted assets	1,115,279	1,101,743
Total Risk-based Capital
Adequately capitalized requirement total capital to risk-weighted assets	664,529	653,371
Actual total capital to risk-weighted assets	$ 1,159,635	$ 1,145,351
Risk Based Ratios
Well capitalized requirement, tier 1 capital to average assets (greater than or equal to) (as a percent)	5.00%
Adequately capitalized requirement, tier 1 capital to average assets (greater than or equal to) (as a percent)	4.00%	4.00%
Well capitalized requirement, tier 1 common equity capital to risk-weighted assets (greater than or equal to) (as a percent)	6.50%
Adequately capitalized requirement, tier 1 common equity capital to risk-weighted assets (greater than or equal to) (as a percent)	4.50%	4.50%
Well capitalized requirement, tier 1 capital to risk-weighted assets (greater than or equal to) (as a percent)	8.00%	6.00%
Adequately capitalized requirement, tier 1 capital to risk-weighted assets (greater than or equal to) (as a percent)	6.00%	6.00%	4.00%
Well capitalized requirement, total capital to risk-weighted assets (greater than or equal to) (as a percent)	10.00%
Adequately capitalized requirement, total capital to risk-weighted assets (greater than or equal to) (as a percent)	8.00%	8.00%
Leverage Ratios
Actual tier 1 capital to average assets (as a percent)	11.60%	12.20%
Actual tier 1 common equity capital to risk-weighted assets (as a percent)	12.20%	12.40%
Actual tier 1 capital to risk-weighted assets (as a percent)	13.40%	13.50%
Actual tier 1 capital to total capital to risk-weighted assets (as a percent)	14.00%	14.00%
Bank
Tier 1 Leverage Capital
Well capitalized requirement tier 1 capital to average assets	$ 478,803	$ 450,006
Adequately capitalized requirement tier 1 capital to average assets	383,042	360,005
Actual tier 1 capital to average assets	1,022,161	1,010,409
Tier 1 Common Equity Capital
Well capitalized requirement tier 1 common equity capital to risk-weighted assets	539,229	529,887
Adequately capitalized requirement tier 1 common equity capital to risk-weighted assets	373,312	366,845
Actual tier 1 common equity capital to risk-weighted average assets	1,022,161	1,010,409
Tier 1 Risk-based Capital
Well capitalized requirement tier 1 capital to risk-weighted assets	663,666	652,169
Adequately capitalized requirement tier 1 capital to risk-weighted assets	497,749	489,127
Actual tier 1 capital to risk-weighted assets	1,022,161	1,010,409
Total Risk-based Capital
Well capitalized requirement total capital to risk-weighted assets	829,582	815,211
Adequately capitalized requirement total capital to risk-weighted assets	663,666	652,169
Actual total capital to risk-weighted assets	$ 1,066,518	$ 1,054,016
Risk Based Ratios
Well capitalized requirement, tier 1 capital to average assets (greater than or equal to) (as a percent)	5.00%	5.00%
Adequately capitalized requirement, tier 1 capital to average assets (greater than or equal to) (as a percent)	4.00%	4.00%
Well capitalized requirement, tier 1 common equity capital to risk-weighted assets (greater than or equal to) (as a percent)	6.50%	6.50%
Adequately capitalized requirement, tier 1 common equity capital to risk-weighted assets (greater than or equal to) (as a percent)	4.50%	4.50%
Well capitalized requirement, tier 1 capital to risk-weighted assets (greater than or equal to) (as a percent)	8.00%	8.00%
Adequately capitalized requirement, tier 1 capital to risk-weighted assets (greater than or equal to) (as a percent)	6.00%	6.00%
Well capitalized requirement, total capital to risk-weighted assets (greater than or equal to) (as a percent)	10.00%	10.00%
Adequately capitalized requirement, total capital to risk-weighted assets (greater than or equal to) (as a percent)	8.00%	8.00%
Leverage Ratios
Actual tier 1 capital to average assets (as a percent)	10.70%	11.20%
Actual tier 1 common equity capital to risk-weighted assets (as a percent)	12.30%	12.40%
Actual tier 1 capital to risk-weighted assets (as a percent)	12.30%	12.40%
Actual tier 1 capital to total capital to risk-weighted assets (as a percent)	12.90%	12.90%

Shareholders' Equity and Mini66

Shareholders' Equity and Minimum Regulatory Capital Requirements - Additional Information (Detail) - USD ($)	Apr. 20, 2017	Jan. 31, 2017	Jan. 24, 2017	Oct. 19, 2016	Jun. 01, 2016	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2015
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Period of retained net profits						2 years
Approved dividend to Company by subsidiary		$ 4,200,000	$ 6,100,000	$ 5,700,000	$ 64,200,000
Adequately capitalized requirement, tier 1 common equity capital to risk-weighted assets (greater than or equal to) (as a percent)						4.50%		4.50%
Adequately capitalized requirement, tier 1 capital to risk-weighted assets (greater than or equal to) (as a percent)						6.00%		6.00%	4.00%
Adequately capitalized requirement, total capital to risk-weighted assets (greater than or equal to) (as a percent)						8.00%		8.00%
Adequately capitalized requirement, tier 1 capital to average assets (greater than or equal to) (as a percent)						4.00%		4.00%
Conservation buffer, required amount, 2016 (as a percent)						0.625%
Conservation buffer, required amount, 2017 (as a percent)						1.25%
Conservation buffer, required amount, 2018 (as a percent)						1.875%
Conservation buffer, required amount, 2019 and thereafter (as a percent)						2.50%
Conservation buffer, actual (as a percent)						4.90%
Conservation buffer, required amount (as a percent)						2.50%
Well capitalized requirement, tier 1 common equity capital to risk-weighted assets (greater than or equal to) (as a percent)						6.50%
Well capitalized requirement, tier 1 capital to risk-weighted assets (greater than or equal to) (as a percent)						8.00%		6.00%
Well capitalized requirement, total capital to risk-weighted assets (greater than or equal to) (as a percent)						10.00%
Well capitalized requirement, tier 1 capital to average assets (greater than or equal to) (as a percent)						5.00%
Stock repurchase, authorized amount						$ 400,000,000
Stock repurchased						$ 312,384,000		$ 312,384,000
Stock repurchased (in shares)						13,040,000		13,040,000
Share Repurchase Plan
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Stock repurchased						$ 312,400,000
Stock repurchased (in shares)						12,739,763
Stock repurchased, average price per share (in dollars per share)						$ 24.52
Remaining availability for future share repurchases						$ 87,600,000
Subsequent event
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Dividend declared per share (in dollars per share)	$ 0.12
Forecast
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Adequately capitalized requirement, tier 1 common equity capital to risk-weighted assets (greater than or equal to) (as a percent)							7.00%
Adequately capitalized requirement, tier 1 capital to risk-weighted assets (greater than or equal to) (as a percent)							8.50%
Adequately capitalized requirement, total capital to risk-weighted assets (greater than or equal to) (as a percent)							10.50%

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2017USD ($)planshares	Mar. 31, 2016USD ($)shares
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Number of compensation plans \| plan	2
Tax benefit related to stock-based compensation expense \| $	$ 0.5	$ 0.1
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Weighted average remaining contractual life	3 years 7 months 18 days
Aggregate intrinsic value, outstanding \| $	$ 68.2
Restricted stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting period	3 years
Restricted stock granted (in shares)	165,000	185,000
2010 And 2013 Plan \| Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Minimum exercise price for common stock (as percent)	100.00%
Stock award exercise expiration period from grant date	10 years
Options exercised after ten years (in shares)	56,927
Stock options granted (in shares)	15,623
2010 And 2013 Plan \| 10% Percent Owners \| Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Minimum exercise price for common stock (as percent)	110.00%
Stock ownership percentage for 110% exercise price (more than) (as percent)	10.00%
Stock award exercise expiration period from grant date	5 years
2013 Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Plan effective date	May 22, 2013
Plan expiration date	May 22, 2023
Number of shares authorized under plan (in shares)	2,639,000
2013 Plan \| Restricted stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Restricted stock granted (in shares)	165,063

Stock-Based Compensation - Comp

Stock-Based Compensation - Components and Classification of Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 900	$ 317
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	24	9
Restricted stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 876	$ 308

Stock-Based Compensation - Weig

Stock-Based Compensation - Weighted Average Assumptions Used to Compute Fair Value (Details) - Stock options	3 Months Ended
	Mar. 31, 2017$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	1.21%
Risk-free interest rate	2.13%
Expected option life	6 years
Volatility	21.94%
Weighted average grant-date fair value of options granted (in dollars per share)	$ 8.61

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Detail) - Stock options - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Shares
Beginning balance (in shares)	3,180	3,075
Granted (in shares)	15	30
Exercised (in shares)	(57)	(10)
Canceled, expired or forfeited (in shares)	0	0
Ending balance (in shares)	3,138	3,095
Weighted Average Exercise Price Per Share
Beginning balance (in dollars per share)	$ 20.86	$ 20.12
Granted (in dollars per share)	39.55	30.54
Exercised (in dollars per share)	21.06	18
Canceled, expired or forfeited (in dollars per share)	0	0
Ending balance (in dollars per share)	$ 20.94	$ 20.23

Stock-Based Compensation - Opti

Stock-Based Compensation - Options Outstanding (Detail) - Stock options shares in Thousands	3 Months Ended
	Mar. 31, 2017$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise prices, lower range limit (in dollars per share)	$ 18
Exercise prices, upper range limit (in dollars per share)	$ 2,026
Outstanding options (in shares) \| shares	3,138
Weighted average remaining contractual life, outstanding options	3 years 7 months 18 days
Weighted average exercise price per share, outstanding options (in dollars per share)	$ 20.94
Exercisable options (in shares) \| shares	3,081
Weighted average exercise price per share, exercisable options (in dollars per share)	$ 20.67
$ 18
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise prices, lower range limit (in dollars per share)	18
Exercise prices, upper range limit (in dollars per share)	$ 18
Outstanding options (in shares) \| shares	145
Weighted average remaining contractual life, outstanding options	6 years 1 month 20 days
Weighted average exercise price per share, outstanding options (in dollars per share)	$ 18
Exercisable options (in shares) \| shares	145
Weighted average exercise price per share, exercisable options (in dollars per share)	$ 18
$ 20
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise prices, lower range limit (in dollars per share)	18.01
Exercise prices, upper range limit (in dollars per share)	$ 20
Outstanding options (in shares) \| shares	2,819
Weighted average remaining contractual life, outstanding options	3 years 2 months 24 days
Weighted average exercise price per share, outstanding options (in dollars per share)	$ 20
Exercisable options (in shares) \| shares	2,819
Weighted average exercise price per share, exercisable options (in dollars per share)	$ 20
$20.01 - $1,095.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise prices, lower range limit (in dollars per share)	20.01
Exercise prices, upper range limit (in dollars per share)	$ 1,095
Outstanding options (in shares) \| shares	174
Weighted average remaining contractual life, outstanding options	7 years 10 months 28 days
Weighted average exercise price per share, outstanding options (in dollars per share)	$ 37.63
Exercisable options (in shares) \| shares	117
Weighted average exercise price per share, exercisable options (in dollars per share)	$ 38.50

Stock-Based Compensation - Unve

Stock-Based Compensation - Unvested Restricted Stock Activity (Detail) - Restricted stock - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Shares
Beginning balance (in shares)	197	0
Granted (in shares)	165	185
Vested or released (in shares)	(61)	0
Canceled, expired or forfeited (in shares)	0	0
Ending balance (in shares)	301	185
Weighted Average Grant-Date Fair Value Per Share
Beginning balance (in dollars per share)	$ 30.10	$ 0
Granted (in dollars per share)	39.56	30.54
Vested or released (in dollars per share)	30.54	0
Canceled, expired or forfeited (in dollars per share)	0	0
Ending balance (in dollars per share)	$ 35.51	$ 30.54

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Tax Computed at Applicable Federal Statutory Income Tax Rates to Total Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income before income taxes	$ 31,873	$ 15,620
Income taxes computed at Federal statutory tax rate	11,156	5,467
Effect of:
State taxes (net of federal benefit)	801	470
State statutory rate change	0	13
Tax-exempt interest income, net	(334)	(170)
Other, net	(633)	0
Total income tax expense	$ 10,990	$ 5,780

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
Income Taxes - Additional Information (Detail) - USD ($)	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Effective income tax rate (as a percent)	34.00%	37.00%
Deferred income tax asset, net	$ 146,724,000		$ 150,272,000
Valuation allowance	0		0
Amount of annual commutative limitation	27,800,000
Unrecognized tax benefits	0		0
Uncertain tax positions	0		0
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	471,600,000		478,600,000
Realized built-in-loss carry-forwards	44,300,000
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 506,000,000		$ 507,000,000

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Fair Value on Nonrecurring Basis
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impairment charges from changes in fair value of OREO	$ 0.2	$ 0.7
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other real estate owned, gross	50.7	50
Other real estate owned, valuation allowance	8.7	8.9
Carrying Value \| Commercial properties
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other real estate	37.1	35.5
Carrying Value \| Residential properties
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other real estate	4.9	$ 5.7
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of mortgage servicing rights (MSR)	$ 3.4

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets
Trading securities	$ 4,150	$ 3,791
Available-for-sale securities:
Available-for-sale securities	1,154,496	912,250
Gross asset value of derivatives	1,397	1,078
Liabilities
Gross liability value of derivatives	2,372	1,354
Industrial revenue bonds
Available-for-sale securities:
Available-for-sale securities	3,136	3,298
Corporate bonds
Available-for-sale securities:
Available-for-sale securities	61,102	28,953
State and political subdivisions—tax exempt
Available-for-sale securities:
Available-for-sale securities	11,162	11,077
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Trading securities	0	0
Available-for-sale securities:
Available-for-sale securities	0	0
Gross asset value of derivatives	0	0
Liabilities
Gross liability value of derivatives	0	0
Significant Other Observable Inputs (Level 2)
Assets
Trading securities	4,150	3,791
Available-for-sale securities:
Available-for-sale securities	1,151,360	908,952
Gross asset value of derivatives	1,397	1,078
Liabilities
Gross liability value of derivatives	2,372	1,354
Significant Unobservable Inputs (Level 3)
Assets
Trading securities	0	0
Available-for-sale securities:
Available-for-sale securities	3,136	3,298
Gross asset value of derivatives	0	0
Liabilities
Gross liability value of derivatives	0	0
Fair Value on Recurring Basis
Assets
Trading securities	4,150	3,791
Available-for-sale securities:
Available-for-sale securities	1,154,496	912,250
Gross asset value of derivatives	1,397	1,078
Liabilities
Gross liability value of derivatives	2,372	1,354
Fair Value on Recurring Basis \| Mortgage-backed securities—residential
Available-for-sale securities:
Available-for-sale securities	1,079,096	868,922
Fair Value on Recurring Basis \| Industrial revenue bonds
Available-for-sale securities:
Available-for-sale securities	3,136	3,298
Fair Value on Recurring Basis \| Corporate bonds
Available-for-sale securities:
Available-for-sale securities	61,102	28,953
Fair Value on Recurring Basis \| State and political subdivisions—tax exempt
Available-for-sale securities:
Available-for-sale securities	11,162	11,077
Fair Value on Recurring Basis \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Trading securities	0	0
Available-for-sale securities:
Available-for-sale securities	0	0
Gross asset value of derivatives	0	0
Liabilities
Gross liability value of derivatives	0	0
Fair Value on Recurring Basis \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Mortgage-backed securities—residential
Available-for-sale securities:
Available-for-sale securities	0	0
Fair Value on Recurring Basis \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Industrial revenue bonds
Available-for-sale securities:
Available-for-sale securities	0	0
Fair Value on Recurring Basis \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Corporate bonds
Available-for-sale securities:
Available-for-sale securities	0	0
Fair Value on Recurring Basis \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| State and political subdivisions—tax exempt
Available-for-sale securities:
Available-for-sale securities	0	0
Fair Value on Recurring Basis \| Significant Other Observable Inputs (Level 2)
Assets
Trading securities	4,150	3,791
Available-for-sale securities:
Available-for-sale securities	1,151,360	908,952
Gross asset value of derivatives	1,397	1,078
Liabilities
Gross liability value of derivatives	2,372	1,354
Fair Value on Recurring Basis \| Significant Other Observable Inputs (Level 2) \| Mortgage-backed securities—residential
Available-for-sale securities:
Available-for-sale securities	1,079,096	868,922
Fair Value on Recurring Basis \| Significant Other Observable Inputs (Level 2) \| Industrial revenue bonds
Available-for-sale securities:
Available-for-sale securities	0	0
Fair Value on Recurring Basis \| Significant Other Observable Inputs (Level 2) \| Corporate bonds
Available-for-sale securities:
Available-for-sale securities	61,102	28,953
Fair Value on Recurring Basis \| Significant Other Observable Inputs (Level 2) \| State and political subdivisions—tax exempt
Available-for-sale securities:
Available-for-sale securities	11,162	11,077
Fair Value on Recurring Basis \| Significant Unobservable Inputs (Level 3)
Assets
Trading securities	0	0
Available-for-sale securities:
Available-for-sale securities	3,136	3,298
Gross asset value of derivatives	0	0
Liabilities
Gross liability value of derivatives	0	0
Fair Value on Recurring Basis \| Significant Unobservable Inputs (Level 3) \| Mortgage-backed securities—residential
Available-for-sale securities:
Available-for-sale securities	0	0
Fair Value on Recurring Basis \| Significant Unobservable Inputs (Level 3) \| Industrial revenue bonds
Available-for-sale securities:
Available-for-sale securities	3,136	3,298
Fair Value on Recurring Basis \| Significant Unobservable Inputs (Level 3) \| Corporate bonds
Available-for-sale securities:
Available-for-sale securities	0	0
Fair Value on Recurring Basis \| Significant Unobservable Inputs (Level 3) \| State and political subdivisions—tax exempt
Available-for-sale securities:
Available-for-sale securities	$ 0	$ 0

Fair Value - Fair Value Measure

Fair Value - Fair Value Measurements on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail) - Fair Value on Recurring Basis - Significant Unobservable Inputs (Level 3) - Industrial revenue bonds - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 3,298	$ 3,437
Principal reduction	(170)	(170)
Included in other comprehensive income	8	(18)
Ending balance	$ 3,136	$ 3,249

Fair Value - Quantitative Infor

Fair Value - Quantitative Information About Recurring Level 3 Fair Value Measurements (Detail) - Significant Unobservable Inputs (Level 3) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value	$ 116,645	$ 114,593
Fair Value on Recurring Basis \| Discounted Cash Flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Illiquidity factor (as a percent)	0.50%	0.50%
Fair Value on Recurring Basis \| Industrial revenue bonds \| Discounted Cash Flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value	$ 3,136	$ 3,298
Fair Value on Recurring Basis \| Industrial revenue bonds \| Discounted Cash Flow \| Minimum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Discount rate (as a percent)	3.21%	3.31%
Fair Value on Recurring Basis \| Industrial revenue bonds \| Discounted Cash Flow \| Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Discount rate (as a percent)	3.24%	3.35%

Fair Value - Assets and Liabi79

Fair Value - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value on Nonrecurring Basis - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	$ 0	$ 0
Other repossessed assets	206	163
Impaired loans	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	0	0
Other repossessed assets	0	0
Impaired loans	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	42,001	41,168
Other repossessed assets	0	0
Impaired loans	$ 1,107	$ 1,420

Fair Value - Quantitative Inf80

Fair Value - Quantitative Information About Nonrecurring Level 3 Fair Value Measurements (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 7,506,191	$ 7,417,602
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	9,274,321	9,114,263
Other real estate owned \| Fair Value of Property \| Fair Value on Nonrecurring Basis \| Estimated Fair Value \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 42,001	$ 41,168
Weighted average (as a percent)	0.00%	0.00%
Impaired loans \| Fair Value of Collateral \| Fair Value on Nonrecurring Basis \| Estimated Fair Value \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 1,107	$ 1,420
Weighted average (as a percent)	0.00%	0.00%

Fair Value - Carrying Amounts a

Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Financial Assets
Trading securities		$ 4,150	$ 3,791
Investment securities available-for-sale at fair value (amortized cost $1,168,995 and $927,266, respectively)		1,154,496	912,250
Investment securities held-to-maturity		445,696	460,911
Gross asset value of derivatives		1,397	1,078
Financial Liabilities
Contractual deposits		2,134,473	2,137,312
Federal Home Loan Bank advances		490,650	545,701
Gross liability value of derivatives		2,372	1,354
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets
Cash and cash equivalents		160,547	309,055
Trading securities		0	0
Investment securities available-for-sale at fair value (amortized cost $1,168,995 and $927,266, respectively)		0	0
Investment securities held-to-maturity		0	0
Loans, net		0	0
Other earning assets	[1]	0	0
Gross asset value of derivatives		0	0
Total financial assets		160,547	309,055
Financial Liabilities
Non-contractual deposits		0	0
Contractual deposits		0	0
Federal Home Loan Bank advances		0	0
Short-term borrowings		0	0
Subordinated debentures		0	0
Gross liability value of derivatives		0	0
Total financial liabilities		0	0
Significant Other Observable Inputs (Level 2)
Financial Assets
Cash and cash equivalents		0	0
Trading securities		4,150	3,791
Investment securities available-for-sale at fair value (amortized cost $1,168,995 and $927,266, respectively)		1,151,360	908,952
Investment securities held-to-maturity		445,696	460,911
Loans, net		4,980	12,874
Other earning assets	[1]	0	0
Gross asset value of derivatives		1,397	1,078
Total financial assets		1,607,583	1,387,606
Financial Liabilities
Non-contractual deposits		5,958,134	5,743,316
Contractual deposits		2,118,049	2,121,519
Federal Home Loan Bank advances		489,540	546,023
Short-term borrowings		21,122	19,154
Subordinated debentures		0	0
Gross liability value of derivatives		2,372	1,354
Total financial liabilities		8,589,217	8,431,366
Significant Unobservable Inputs (Level 3)
Financial Assets
Cash and cash equivalents		0	0
Trading securities		0	0
Investment securities available-for-sale at fair value (amortized cost $1,168,995 and $927,266, respectively)		3,136	3,298
Investment securities held-to-maturity		0	0
Loans, net		7,473,259	7,382,254
Other earning assets	[1]	29,796	32,050
Gross asset value of derivatives		0	0
Total financial assets		7,506,191	7,417,602
Financial Liabilities
Non-contractual deposits		0	0
Contractual deposits		0	0
Federal Home Loan Bank advances		0	0
Short-term borrowings		0	0
Subordinated debentures		116,645	114,593
Gross liability value of derivatives		0	0
Total financial liabilities		116,645	114,593
Carrying Value
Financial Assets
Cash and cash equivalents		160,547	309,055
Trading securities		4,150	3,791
Investment securities available-for-sale at fair value (amortized cost $1,168,995 and $927,266, respectively)		1,154,496	912,250
Investment securities held-to-maturity		446,020	463,959
Loans, net		7,468,064	7,363,127
Other earning assets	[1]	29,796	32,050
Gross asset value of derivatives		1,397	1,078
Total financial assets		9,264,470	9,085,310
Financial Liabilities
Non-contractual deposits		5,958,134	5,743,316
Contractual deposits		2,134,473	2,137,312
Federal Home Loan Bank advances		490,650	545,701
Short-term borrowings		21,125	19,157
Subordinated debentures		117,272	116,456
Gross liability value of derivatives		2,372	1,354
Total financial liabilities		8,724,026	8,563,296
Estimated Fair Value
Financial Assets
Cash and cash equivalents		160,547	309,055
Trading securities		4,150	3,791
Investment securities available-for-sale at fair value (amortized cost $1,168,995 and $927,266, respectively)		1,154,496	912,250
Investment securities held-to-maturity		445,696	460,911
Loans, net		7,478,239	7,395,128
Other earning assets	[1]	29,796	32,050
Gross asset value of derivatives		1,397	1,078
Total financial assets		9,274,321	9,114,263
Financial Liabilities
Non-contractual deposits		5,958,134	5,743,316
Contractual deposits		2,118,049	2,121,519
Federal Home Loan Bank advances		489,540	546,023
Short-term borrowings		21,122	19,154
Subordinated debentures		116,645	114,593
Gross liability value of derivatives		2,372	1,354
Total financial liabilities		$ 8,705,862	$ 8,545,959

[1]	Includes Federal Home Loan Bank stock.

Derivative and Hedging Activi82

Derivative and Hedging Activities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017USD ($)cash_flow_hedgederivative_instrument	Mar. 31, 2016USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Estimated decrease to be reclassified to interest income in the next twelve months	$ 700,000
Discontinued cash flow hedges \| cash_flow_hedge	0
Gain (loss) reclassified into earnings due to discontinuance	$ 0
Cash collateral received	700,000
Collateral posted against obligations	$ 800,000
Liability derivatives, number of instruments \| derivative_instrument	11
Non-interest income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on derivative	$ 103,000	$ 24,000
Non-interest expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on derivative	(114,000)	$ (1,000)
Interest rate swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	2,371,000
Interest rate swap \| Derivatives not designated as hedging instruments \| Non-interest income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on derivative	$ 200,000

Derivative and Hedging Activi83

Derivative and Hedging Activities - Summary of Derivative Instrument Contracts at Fair Value and Balance Sheet Classification (Detail) $ in Thousands	Mar. 31, 2017USD ($)derivative_instrument	Dec. 31, 2016USD ($)
Derivatives, Fair Value [Line Items]
Gross asset value of derivatives	$ 1,397	$ 1,078
Asset derivatives, notional amount	$ 55,327	149,152
Liability derivatives, number of instruments \| derivative_instrument	11
Liability derivatives, fair value	$ 2,372	1,354
Liability derivatives, notional amount	275,069	151,817
Interest rate swap
Derivatives, Fair Value [Line Items]
Gross asset value of derivatives	1,281
Liability derivatives, fair value	2,371
Derivatives designated as hedging instruments \| Interest rate swap
Derivatives, Fair Value [Line Items]
Gross asset value of derivatives	1,281
Liability derivatives, fair value	$ 2,371
Derivatives designated as hedging instruments \| Interest rate swap \| Other assets
Derivatives, Fair Value [Line Items]
Asset derivatives, number of instruments \| derivative_instrument	0
Gross asset value of derivatives	$ 0	130
Asset derivatives, notional amount	$ 0	120,000
Derivatives designated as hedging instruments \| Interest rate swap \| Other liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives, number of instruments \| derivative_instrument	4
Liability derivatives, fair value	$ 1,131	378
Liability derivatives, notional amount	$ 235,000	115,000
Derivatives not designated as hedging instruments \| Interest rate swap \| Other assets
Derivatives, Fair Value [Line Items]
Asset derivatives, number of instruments \| derivative_instrument	7
Gross asset value of derivatives	$ 1,281	935
Asset derivatives, notional amount	$ 39,588	24,947
Derivatives not designated as hedging instruments \| Interest rate swap \| Other liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives, number of instruments \| derivative_instrument	7
Liability derivatives, fair value	$ 1,240	862
Liability derivatives, notional amount	$ 39,855	24,947
Derivatives not designated as hedging instruments \| Forward loan sales contracts \| Other assets
Derivatives, Fair Value [Line Items]
Asset derivatives, number of instruments \| derivative_instrument	87
Gross asset value of derivatives	$ 116	13
Asset derivatives, notional amount	$ 15,739	4,205
Derivatives not designated as hedging instruments \| Forward loan sales contracts \| Other liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives, number of instruments \| derivative_instrument	1
Liability derivatives, fair value	$ 1	114
Liability derivatives, notional amount	$ 214	$ 11,870

Derivative and Hedging Activi84

Derivative and Hedging Activities - Summary of Derivative Instrument on the Consolidated Statements of Income (Details) - Interest rate swap - Derivatives designated as hedging instruments - Cash Flow Hedging $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in Accumulated OCI on Derivative (Effective Portion)	$ (451)
Amount Recognized in Income on Derivative (Ineffective Portion)	0
Interest income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from Accumulated OCI on Derivative (Effective Portion)	$ 432

Derivative and Hedging Activi85

Derivative and Hedging Activities - Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Offsetting of derivative assets:
Gross Amount of Recognized Assets	$ 1,397	$ 1,078
Offsetting of derivative liabilities:
Gross Amount of Recognized Assets	2,372	$ 1,354
Interest rate swap
Offsetting of derivative assets:
Gross Amount of Recognized Assets	1,281
Gross Amount Offset in the Balance Sheets	0
Net Amount of Assets Presented in the Balance Sheets	1,281
Gross Amounts Not Offset in the Balance Sheets, Financial Instruments	635
Gross Amounts Not Offset in the Balance Sheets, Cash Collateral Received	364
Net Amount	282
Offsetting of derivative liabilities:
Gross Amount of Recognized Assets	2,371
Gross Amount Offset in the Balance Sheets	0
Net Amount of Assets Presented in the Balance Sheets	2,371
Gross Amounts Not Offset in the Balance Sheets, Financial Instruments	635
Gross Amounts Not Offset in the Balance Sheets, Cash Collateral Received	792
Net Amount	944
Derivatives designated as hedging instruments \| Interest rate swap
Offsetting of derivative assets:
Gross Amount of Recognized Assets	1,281
Gross Amount Offset in the Balance Sheets	0
Net Amount of Assets Presented in the Balance Sheets	1,281
Gross Amounts Not Offset in the Balance Sheets, Financial Instruments	635
Gross Amounts Not Offset in the Balance Sheets, Cash Collateral Received	364
Net Amount	282
Offsetting of derivative liabilities:
Gross Amount of Recognized Assets	2,371
Gross Amount Offset in the Balance Sheets	0
Net Amount of Assets Presented in the Balance Sheets	2,371
Gross Amounts Not Offset in the Balance Sheets, Financial Instruments	635
Gross Amounts Not Offset in the Balance Sheets, Cash Collateral Received	792
Net Amount	$ 944