Capital Bank Financial (CBF) 10-Q 6 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 31, 2014	Oct. 31, 2014
		Common Class A	Common Class B
Document Information [Line Items]	'	'	'
Document Type	'10-Q	'	'
Amendment Flag	'false	'	'
Document Period End Date	30-Sep-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'Q3	'	'
Entity Registrant Name	'Capital Bank Financial Corp.	'	'
Entity Central Index Key	'0001479750	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	30,018,114	17,574,807

Consolidated_Balance_Sheets_Un

Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'
Cash and due from banks	$92,704	$118,937
Interest-bearing deposits in other banks	66,706	45,504
Total cash and cash equivalents	159,410	164,441
Trading securities	2,312	6,348
Investment securities available-for-sale at fair value (amortized cost $582,623 and $688,717, respectively)	580,732	685,441
Investment securities held-to-maturity at amortized cost (fair value $457,712 and $459,693, respectively)	454,809	465,098
Loans held for sale	6,439	8,012
Loans, net of deferred loan costs and fees	4,817,332	4,544,017
Less: Allowance for loan losses	52,334	56,851
Loans, net	4,764,998	4,487,166
Other real estate owned	90,277	129,396
FDIC indemnification asset	21,025	33,610
Receivable from FDIC	3,491	7,624
Premises and equipment, net	174,941	179,855
Goodwill	134,522	131,987
Intangible assets, net	19,865	23,365
Deferred income tax asset, net	139,388	166,762
Other assets	138,090	128,456
Total Assets	6,690,299	6,617,561
Deposits:	'	'
Non-interest bearing demand	1,006,556	923,993
Negotiable order of withdrawal	1,309,839	1,321,903
Money market	914,226	961,526
Savings	514,729	530,144
Time deposits	1,430,106	1,447,497
Total deposits	5,175,456	5,185,063
Federal Home Loan Bank advances	226,138	96,278
Short-term borrowings	23,823	24,850
Long-term borrowings	139,396	138,561
Accrued expenses and other liabilities	60,547	60,021
Total liabilities	5,625,360	5,504,773
Shareholdersb equity	'	'
Preferred stock $0.01 par value: 50,000 shares authorized, 0 shares issued	0	0
Additional paid in capital	1,081,177	1,082,235
Retained earnings	144,567	107,485
Accumulated other comprehensive loss	-6,018	-7,528
Treasury stock, at cost, 7,348 and 3,761 shares, respectively	-155,344	-69,962
Total shareholdersb equity	1,064,939	1,112,788
Total Liabilities and Shareholdersb Equity	6,690,299	6,617,561
Common Class A	'	'
Shareholdersb equity	'	'
Common stock	367	362
Total shareholdersb equity	367	362
Common Class B	'	'
Shareholdersb equity	'	'
Common stock	190	196
Total shareholdersb equity	$190	$196

Consolidated_Balance_Sheets_Un1

Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Amortized cost of investment securities available-for-sale	$582,623	$688,717
Fair value of investment securities held-to-maturity	$457,712	$459,693
Preferred stock, par value (in dollars per share)	$0.01	$0.01
Preferred stock, authorized shares	50,000,000	50,000,000
Preferred stock, issued shares	0	0
Treasury stock, shares	7,348,000	3,761,000
Common Class A	'	'
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	36,662,000	36,212,000
Common stock, shares outstanding	30,114,000	33,051,000
Common Class B	'	'
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	19,017,000	19,647,000
Common stock, shares outstanding	18,217,000	19,047,000

Consolidated_Statements_of_Inc

Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest and dividend income	'	'	'	'
Loans, including fees	$61,942	$67,355	$186,828	$207,327
Investment securities:	'	'	'	'
Taxable interest income	4,913	4,383	13,853	11,925
Tax-exempt interest income	152	158	463	484
Dividends	14	14	44	44
Interest-bearing deposits in other banks	18	37	81	510
Other earning assets	604	533	1,763	1,485
Total interest and dividend income	67,643	72,480	203,032	221,775
Interest expense	'	'	'	'
Deposits	4,362	5,135	12,923	17,541
Long-term borrowings	1,731	1,952	5,154	6,346
Federal Home Loan Bank advances	115	1	217	3
Other borrowings	10	6	29	33
Total interest expense	6,218	7,094	18,323	23,923
Net Interest Income	61,425	65,386	184,709	197,852
Provision (reversal) for loan losses	-1,332	984	48	10,853
Net interest income after provision (reversal) for loan losses	62,757	64,402	184,661	186,999
Non-Interest Income	'	'	'	'
Service charges on deposit accounts	5,565	6,034	16,673	18,711
Debit card income	3,017	2,854	8,964	8,669
Fees on mortgage loans originated and sold	1,195	1,477	3,077	4,319
Investment advisory and trust fees	1,183	740	3,354	1,380
FDIC indemnification asset expense	-3,881	-502	-8,110	-3,779
Legal settlements and insurance recoveries	0	900	0	900
Investment securities gains (losses), net	317	-247	463	-42
Gross impairment loss	0	-54	0	-54
Less: Impairment recognized in other comprehensive income	0	0	0	0
Net impairment loss recognized in earnings	0	-54	0	-54
Other income	2,561	4,078	8,792	9,591
Total non-interest income	9,957	15,280	33,213	39,695
Non-Interest Expense	'	'	'	'
Salaries and employee benefits	22,590	22,668	69,537	66,090
Stock-based compensation expense	443	1,371	2,191	4,312
Net occupancy and equipment expense	8,475	8,866	25,797	26,459
Computer services	3,332	3,231	9,974	9,872
Software expense	1,932	1,874	5,740	5,514
Telecommunication expense	1,406	1,534	4,642	4,919
OREO valuation expense	2,752	6,045	9,347	18,844
(Gains) losses on sales of OREO	-223	188	-4,136	-3,204
Foreclosed asset related expense	845	1,265	3,295	4,909
Loan workout expense	911	2,063	3,205	6,363
Professional fees	1,532	2,426	5,574	7,418
Gains on extinguishment of debt	0	-430	0	-122
Contingent value right expense (income)	278	-776	1,372	2,535
Regulatory assessments	1,637	1,710	4,914	5,276
Other expense	5,508	7,228	16,463	20,773
Total non-interest expense	51,418	59,263	157,915	179,958
Income before income taxes	21,296	20,419	59,959	46,736
Income tax expense	8,053	8,975	22,877	20,098
Net income	$13,243	$11,444	$37,082	$26,638
Earnings per share:	'	'	'	'
Earnings per share, basic (in dollars per share)	$0.28	$0.22	$0.75	$0.50
Earnings per share, diluted (in dollars per share)	$0.27	$0.22	$0.74	$0.49
Weighted average shares outstanding:	'	'	'	'
Weighted average number of shares outstanding, basic	47,912	51,804	49,164	53,170
Weighted average number of shares outstanding, diluted	49,069	52,755	50,406	54,032

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net Income	$13,243	$11,444	$37,082	$26,638
Other comprehensive income before tax:	'	'	'	'
Unrealized holding (losses) gains on investment securities available-for-sale	-4,634	17,692	2,040	-15,826
Unrealized holding losses on investment securities transferred from available-for-sale to held-to-maturity	0	-9,354	0	-9,354
Reclassification adjustment for (losses) gains realized in net income on securities available-for-sale	-333	54	-655	-151
Reclassification adjustment for losses amortized in net income on securities held-to-maturity	379	0	1,084	0
Other comprehensive (loss) income, before tax:	-4,588	8,392	2,469	-25,331
Tax effect	1,782	-3,234	-959	9,748
Other comprehensive (loss) income, net of tax:	-2,806	5,158	1,510	-15,583
Comprehensive income	$10,437	$16,602	$38,592	$11,055

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $)	Total	Common Class A	Common Class B	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
In Thousands, except Share data
Beginning balance at Dec. 31, 2012	$1,155,343	$330	$228	$1,076,797	$68,641	$9,347	'
Beginning balance, shares at Dec. 31, 2012	'	33,025,000	22,821,000	'	'	'	'
Net Income	26,638	'	'	'	26,638	'	'
Other comprehensive income, net of tax expense (benefit) of $959 and ($9,748) in in period ended September 30, 2014 and 2013, respectively	-15,583	'	'	'	'	-15,583	'
Stock-based compensation	4,312	'	'	4,312	'	'	'
Fractional shares, shares	'	'	8,000	'	'	'	'
Fractional shares, value	-1	'	'	-1	'	'	'
Restricted stock grants, shares	'	4,000	'	'	'	'	'
Restricted stock grants, value	'	'	'	'	0	0	0
Purchase of treasury stock, shares	'	-3,439,000	'	'	'	'	'
Purchase of treasury stock, value	-62,884	'	'	'	'	'	-62,884
Conversion of shares, shares	'	3,148,000	-3,148,000	'	'	'	'
Conversion of shares, value	'	31	-31	'	'	'	'
Ending balance at Sep. 30, 2013	1,107,825	361	197	1,081,108	95,279	-6,236	-62,884
Ending balance, shares at Sep. 30, 2013	'	32,738,000	19,681,000	'	'	'	'
Beginning balance at Dec. 31, 2013	1,112,788	362	196	1,082,235	107,485	-7,528	-69,962
Beginning balance, shares at Dec. 31, 2013	'	33,051,000	19,047,000	'	'	'	'
Net Income	37,082	'	'	'	37,082	'	'
Other comprehensive income, net of tax expense (benefit) of $959 and ($9,748) in in period ended September 30, 2014 and 2013, respectively	1,510	'	'	'	'	1,510	'
Stock-based compensation	2,191	'	'	2,191	'	'	'
Full value stock awards , shares	'	12,000	'	'	'	'	'
Full value stock awards , value	'	'	'	'	0	0	0
Excess tax benefit from share-based payment	1,603	'	'	1,603	'	'	'
Restricted stock cancelled, shares	'	-192,000	'	'	'	'	'
Restricted stock cancelled, value	-4,853	-1	'	-4,852	'	'	'
Purchase of treasury stock, shares	'	-3,387,000	-200,000	'	'	'	'
Purchase of treasury stock, value	-85,382	'	'	'	'	'	-85,382
Conversion of shares, shares	'	630,000	-630,000	'	'	'	'
Conversion of shares, value	'	6	-6	'	'	'	'
Ending balance at Sep. 30, 2014	$1,064,939	$367	$190	$1,081,177	$144,567	($6,018)	($155,344)
Ending balance, shares at Sep. 30, 2014	'	30,114,000	18,217,000	'	'	'	'

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Other comprehensive income tax expense (benefit)	$959	($9,748)
Accumulated Other Comprehensive Income (Loss)	'	'
Other comprehensive income tax expense (benefit)	$959	$9,748

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities	'	'
Net Income	$37,082	$26,638
Adjustments to reconcile net income to net cash (used in) provided by operating activities:	'	'
Accretion of purchased credit impaired loans	-92,743	-126,634
Depreciation and amortization	14,248	15,795
Provision (reversal) for loan losses	48	10,853
Deferred income tax	23,879	14,977
Net amortization of investment securities premium/discount	6,375	9,339
Other than temporary impairment of investment securities	0	54
Net realized (gains) losses on sales of investment securities	-463	42
Stock-based compensation expense	2,191	4,312
Gains on sales of OREO	-4,136	-3,204
OREO valuation expenses	9,347	18,844
Other	39	-38
Net deferred loan origination fees	-5,417	-2,416
Gains on extinguishment of debt	0	-122
Mortgage loans originated for sale	-107,232	-138,686
Proceeds from sales of mortgage loans originated for sale	111,882	145,363
Fees on mortgage loans originated and sold	-3,077	-4,319
FDIC indemnification asset expense	8,110	3,779
Gains on sales/disposals of premises and equipment	-45	-419
Gains on exchange of partnership interests	0	-1,536
Proceeds from FDIC loss share agreements	9,616	12,211
Change in other assets	-7,220	10,507
Change in accrued expenses and other liabilities	-4,218	6,658
Net cash (used in) provided by operating activities	-1,734	1,998
Cash flows from investing activities	'	'
Purchases of investment securities available-for-sale	-140,653	-436,365
Purchases of investment securities held-to-maturity	-44,143	0
Repayments of principal and maturities of investment securities available-for-sale	172,594	225
Repayments of principal and maturities of investment securities available-for-sale	73,896	178,592
Repayments of principal and maturities of investment securities held-to-maturity	53,897	27,347
Net purchases of FHLB and FRB stock	-3,421	-978
Net (increase) decrease in loans	-212,736	319,814
Proceeds from sales of loans	2,564	0
Purchases of premises and equipment	-5,241	-2,473
Proceeds from sales of premises and equipment	139	6,707
Proceeds from sales of OREO	64,360	62,165
Net cash (used in) provided by investing activities	-38,744	155,034
Cash flows from financing activities	'	'
Net increase (decrease) in demand, money market and savings accounts	7,783	-113,473
Net decrease in time deposits	-17,390	-490,925
Net decrease in federal funds purchased and securities sold under agreement to repurchase	-1,027	-18,284
Net decrease in short term FHLB advances	129,720	0
Net increase (decrease) in long term FHLB advances	140	-136
Prepayments of long term borrowings	0	-42,500
Excess tax benefit from share-based payment	1,603	0
Purchases of treasury stock	-85,382	-62,884
Net cash provided by (used in) financing activities	35,447	-728,202
Net decrease in cash and cash equivalents	-5,031	-571,170
Cash and cash equivalents at beginning of period	164,441	734,874
Cash and cash equivalents at end of period	159,410	163,704
Supplemental disclosures of cash:	'	'
Interest paid	17,869	24,954
Cash collections of contractual interest on purchased credit impaired loans	63,528	91,983
Income taxes paid	1,315	1,641
Supplemental disclosures of non-cash transactions:	'	'
OREO acquired through loan transfers and acquisitions	30,452	53,366
Transfer of available-for-sale securities to held-to-maturity securities	$0	$510,976

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	Principles of Consolidation and Nature of Operations
	Capital Bank Financial Corp. (“CBF” or the “Company”; formerly known as North American Financial Holdings, Inc.) is a bank holding company incorporated in Delaware and headquartered in Florida whose business is conducted primarily through Capital Bank, National Association (“Capital Bank, NA” or the “Bank”). CBF has a total of 162 full service banking offices located in Florida, North and South Carolina, Tennessee and Virginia.
	The accompanying consolidated financial statements (unaudited) 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, 2013.
	Out of Period Adjustments
	During the three months ended March 31, 2014, the Company recorded a correction of an error resulting from the state net operating loss that the Company was not entitled to subsequent to the 2011 Green Bankshares acquisition. The impact of this correction decreased deferred tax assets and increased goodwill by $2.5 million. After evaluating the quantitative and qualitative aspects of this error, the Company concluded that its prior period financial statements were not materially misstated.
	Recent Accounting Pronouncements
	In August 2014, the Financial Accounting Standard Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2014-15, "Presentation of Financial Statements-Going Concern (Subtopic 205-40)—Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern". The amendments in this update provide guidance in U.S. GAAP about management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. The amendments in this update apply to all entities and will be effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In August 2014, the FASB issued ASU 2014-14, "Receivables—Troubled Debt Restructuring by Creditors (Subtopic 310-40)—Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure". The amendment in this update requires that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if certain conditions are met. Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The amendments in this update affect creditors that hold government-guaranteed mortgage loans, including those guaranteed by the Federal Housing Administration ("FHA") of the U.S. Department of Housing and Urban Development ("HUD"), and the U.S. Department of Veterans Affairs ("VA"). This ASU will be effective for the annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In June 2014, the FASB issued ASU No. 2014-12, “Compensation- Stock Compensation (Topic 718)—Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could be Achieved after the Requisite Service Period”. This update provides specific guidance on whether to treat a performance target that could be achieved after the requisite service period as a performance condition that affects vesting or as a nonvesting condition that affects the grant-date fair value of an award. This ASU is effective for fiscal years and interim periods beginning after December 15, 2015. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In June 2014, the FASB issued ASU No. 2014-11, “Transfers and Servicing (topic 860)—Repurchase-to-Maturity Transactions, Repurchase Financing, and Disclosures”. This update changes the accounting for repurchase-to-maturity transactions and linked repurchase financings to secured borrowing accounting, which is consistent with the accounting for other repurchase agreements. The amendments also require two new disclosures. The first disclosure requires an entity to disclose information on transfers accounted for as sales in transactions that are economically similar to repurchase agreements. The second disclosure provides increased transparency about the types of collateral pledged in repurchase agreements and similar transactions accounted for as secured borrowings. The accounting changes in this update are effective for the first interim or annual period beginning after December 15, 2014. The disclosure for certain transactions accounted for as a sale is required to be presented for interim and annual periods beginning after December 15, 2014, and the disclosure for repurchase agreements, securities lending transactions, and repurchase-to-maturity transactions accounted for as secured borrowings is required to be presented for annual periods beginning after December 15, 2014, and interim periods beginning after December 15, 2015. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In May 2014, the FASB issued ASU No. 2014-9, “Revenue from Contracts with Customers (Topic 606)”. This update clarifies the principles for recognizing revenue from contracts with customers. This ASU, which does not apply to financial instruments, is effective for interim and annual reporting periods beginning after December 15, 2016. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows.
	In January 2014, the FASB issued ASU 2014-4, “Receivables—Troubled Debt Restructuring by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).” This update clarifies that when an in-substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1)the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2)the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed-in-lieu of foreclosure or through a similar legal agreement. This ASU is effective for fiscal years and interim periods beginning after December 15, 2014. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In January 2014, the FASB issued ASU 2014-1, “Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects (a consensus of the FASB Emerging Issues Task Force).” This ASU allows for use of the proportional amortization method for qualified affordable housing projects if certain conditions are met. Under the proportional amortization method, the initial cost of the investment is amortized in proportion to the tax credits and other tax benefits received and the net investment performance is recognized in the income statement as a component of income tax expense. This ASU provides for a practical expedient, which allows for amortization of only expected tax credits over the period tax credits are expected to be received. This method is permitted if it produces a measurement that is substantially similar to the measurement that would result from using both tax credits and other tax benefits. This ASU is effective for fiscal years and interim periods beginning after December 15, 2014. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.

Earnings_Per_Common_Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2014
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 includes 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		Nine Months Ended
		30-Sep-14	30-Sep-13	30-Sep-14	30-Sep-13
	Weighted average number of shares outstanding:
	Basic	47,912	51,804	49,164	53,170
	Dilutive effect of options outstanding	498	31	490	—
	Dilutive effect of unvested restricted shares	659	920	752	862
	Diluted	49,069	52,755	50,406	54,032
	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		Nine Months Ended
		30-Sep-14	30-Sep-13	30-Sep-14	30-Sep-13
	Anti-dilutive stock options	12	269	12	3,133
	Anti-dilutive unvested restricted shares	—	—	—	—

Investment_Securities

Investment Securities	9 Months Ended
	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Investment Securities	'
	Investment Securities
	Trading securities totaled $2.3 million and $6.3 million at September 30, 2014 and December 31, 2013, respectively.
	The amortized cost and estimated fair value of investment securities available-for-sale and held-to-maturity at September 30, 2014 and December 31, 2013, are presented below:
	(Dollars in thousands)	30-Sep-14
		Amortized		Unrealized		Unrealized		Estimated
		Cost		Gains		Losses		Fair Value
	Available-for-Sale
	Marketable equity securities	$	946	$	—	$	—	$	946
	Mortgage-backed securities—residential issued by government sponsored entities	578,097		1,136		3,171		576,062
	Industrial revenue bonds	3,580		144		—		3,724
	Total	$	582,623	$	1,280	$	3,171	$	580,732
	Held-to-Maturity
	U.S. Government agencies	$	14,288	$	—	$	32	$	14,256
	Corporate bonds	25,000		163		—		25,163
	State and political subdivisions—tax exempt	12,970		475		—		13,445
	State and political subdivisions—taxable	539		21		—		560
	Mortgage-backed securities—residential issued by government sponsored entities	402,012		2,638		362		404,288
	Total	$	454,809	$	3,297	$	394	$	457,712
	(Dollars in thousands)	December 31, 2013
		Amortized		Unrealized		Unrealized		Estimated
		Cost		Gains		Losses		Fair Value
	Available-for-Sale
	Asset-backed securities	$	133,647	$	363	$	785	$	133,225
	Marketable equity securities	946		—		15		931
	Mortgage-backed securities—residential issued by government sponsored entities	549,869		2,337		5,580		546,626
	Industrial revenue bonds	3,750		109		—		3,859
	Collateralized debt obligations	505		295		—		800
	Total	$	688,717	$	3,104	$	6,380	$	685,441
	Held-to-Maturity
	U.S. Government agencies	$	14,972	$	—	$	401	$	14,571
	State and political subdivisions—tax exempt	14,201		27		129		14,099
	State and political subdivisions—taxable	545		—		12		533
	Mortgage-backed securities—residential issued by government sponsored entities	435,380		328		5,218		430,490
	Total	$	465,098	$	355	$	5,760	$	459,693
	Proceeds from sales of securities were $22.3 million and $172.6 million for the three and nine months ended September 30, 2014, respectively. Gross gains of $0.3 million and $1.4 million were realized on sales of these investments for the three and nine months ended September 30, 2014, respectively. Gross losses of $0.8 million were realized on sales of these investments for the nine months ended September 30, 2014.
	Proceeds from sales of securities were $0.2 million for the nine months ended September 30, 2013. Gross gains of $0.2 million were realized on sales of these investments for the nine months ended September 30, 2013.
	During the third quarter of 2013, the Company transferred $511.0 million of available-for-sale securities to held-to-maturity securities, reflecting the Company’s intent and ability to hold those securities to maturity. Transfers of investment securities into the held-to-maturity category from the available-for-sale category are accounted for at fair value at the date of transfer. The related $9.7 million of unrealized holding loss, net of tax, that was included in the transfer is retained in other comprehensive income (loss) and is being amortized as an adjustment to interest income over the remaining life of the securities. There were no gains or losses recognized as a result of this transfer.
	The estimated fair value of investment securities at September 30, 2014 , 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 repay obligations without call or prepayment penalties. Debt securities not due at a single maturity date are shown separately.
	(Dollars in thousands)	30-Sep-14
		Amortized		Estimated		Yield
		Cost		Fair Value
	Available-for-sale
	Due in one year or less	$	—	$	—	—	%
	Due after one year through five years	—		—		—	%
	Due after five years through ten years	3,580		3,724		2.23	%
	Due after ten years	—		—		—	%
	Mortgage-backed securities—residential issued by government sponsored entities	578,097		576,062		1.78	%
	Subtotal	581,677		579,786		1.78	%
	Marketable equity securities	946		946
	Total	$	582,623	$	580,732
		Amortized		Estimated		Yield
		Cost		Fair Value
	Held-to-maturity
	Due in one year or less	$	203	$	204	0.76	%
	Due after one year through five years	10,818		10,882		4.65	%
	Due after five years through ten years	24,882		25,354		4.52	%
	Due after ten years	16,894		16,984		2.97	%
	Mortgage-backed securities—residential issued by government sponsored entities	402,012		404,288		2.36	%
	Total	$	454,809	$	457,712	2.56	%
	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
		Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
		Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
30-Sep-14
Available-for-Sale
Mortgage-backed securities—residential issued by government sponsored entities	$	329,422	$	2,621	$	44,276	$	550	$	373,698	$	3,171
Total	$	329,422	$	2,621	$	44,276	$	550	$	373,698	$	3,171
Held-to-Maturity
U.S. Government agencies	$	14,256	$	32	$	—	$	—	$	14,256	$	32
Mortgage-backed securities—residential issued by government sponsored entities	48,313		362		—		—		48,313		362
Total	$	62,569	$	394	$	—	$	—	$	62,569	$	394
(Dollars in thousands)	Less than 12 Months				12 Months or Longer				Total
	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
December 31, 2013
Available-for-Sale
Asset-backed securities	$	102,835	$	785	$	—	$	—	$	102,835	$	785
Marketable equity securities	931		15		—		—		931		15
Mortgage-backed securities—residential issued by government sponsored entities	339,565		5,580		—		—		339,565		5,580
Total	$	443,331	$	6,380	$	—	$	—	$	443,331	$	6,380
Held-to-Maturity
U.S. Government agencies	$	14,571	$	401	$	—	$	—	$	14,571	$	401
State and political subdivisions—tax exempt	10,489		129		—		—		10,489		129
State and political subdivisions—taxable	533		12		—		—		533		12
Mortgage-backed securities—residential issued by government sponsored entities	342,333		5,218		—		—		342,333		5,218
Total	$	367,926	$	5,760	$	—	$	—	$	367,926	$	5,760
As of September 30, 2014, the Company’s security portfolio consisted of 130 securities, 40 of which were in an unrealized loss position. The majority of unrealized losses are related to the Company’s mortgage-backed securities.
The majority of the mortgage-backed securities at September 30, 2014, and December 31, 2013 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 September 30, 2014 or December 31, 2013.
At December 31, 2013, we owned a collateralized debt obligation (“CDO”) collateralized by trust preferred securities issued primarily by banks and several insurance companies. We sold our investment in the CDO on January 7, 2014. Proceeds from the sale were $0.8 million and gross gains were $0.3 million.
Investment securities having carrying values of approximately $314.1 million and $313.5 million at September 30, 2014 and December 31, 2013, 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	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
Loans	'
	Loans
	Major classifications of loans, including loans held for sale, are as follows:
	(Dollars in thousands)		30-Sep-14				31-Dec-13
	Non-owner occupied commercial real estate		$	797,197			$	775,733
	Other commercial construction and land		243,563				300,494
	Multifamily commercial real estate		71,119				67,688
	1-4 family residential construction and land		76,442				71,351
	Total commercial real estate		1,188,321				1,215,266
	Owner occupied commercial real estate		1,026,853				1,058,148
	Commercial and industrial loans		959,641				803,736
	Lease financing		2,175				2,676
	Total commercial		1,988,669				1,864,560
	1-4 family residential		913,219				804,322
	Home equity loans		373,604				386,366
	Other consumer loans		242,451				170,526
	Total consumer		1,529,274				1,361,214
	Other		117,507				110,989
	Total loans		$	4,823,771			$	4,552,029
	Total loans include $6.4 million and $8.0 million of 1-4 family residential loans held for sale and $9.2 million and $3.8 million of net deferred loan origination costs and fees as of September 30, 2014 and December 31, 2013, respectively.
	As of September 30, 2014, other loans include $46.5 million, $47.3 million and $2.1 million of farm land, state and political subdivision obligations and deposit customer overdrafts, respectively. As of December 31, 2013, other loans include $49.7 million, $36.2 million and $2.2 million of farm land, state and political subdivision obligations and deposit customer overdrafts, respectively.
	Covered loans represent loans acquired from the FDIC subject to loss sharing agreements. Covered loans are further broken out into (i) loans acquired with evidence of credit impairment (“Purchased Credit Impaired or PCI Loans”) and (ii) non-PCI loans. Loans originated or purchased by the Company (“New Loans”) and loans acquired through the purchase of CBKN, GRNB, SCMF and TIBB, are not subject to the loss sharing agreements and are classified as “non covered.” Additionally, certain consumer loans acquired through the acquisition of First National Bank of the South, Metro Bank and Turnberry Bank (collectively, the “Failed Banks”) from the FDIC, are specifically excluded from the loss sharing agreements.
	The Company designates 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 statement of income, unless interest rate driven. Additionally, if we have favorable changes in our 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, we will first reverse any previously established allowance for loan losses for the pool. If such estimate exceeds the amount of any previously established allowance, we 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 non-accretable 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								Nine Months Ended
			30-Sep-14				30-Sep-13				30-Sep-14				30-Sep-13
	Accretable Yield
	Balance at beginning of period		$	329,421			$	444,481			$	383,775			$	553,348
	Accretion of income		(28,560		)		(39,625		)		(92,743		)		(126,634		)
	Reclassification from nonaccretable difference		12,720				15,018				48,616				46,117
	Other		(6,394		)		(21,459		)		(32,461		)		(74,416		)
	Balance at end of period		$	307,187			$	398,415			$	307,187			$	398,415
	Nonaccretable difference, balance at the end of the period		$	210,101			$	316,047			$	210,101			$	316,047
	The following table represents the periods we estimate the remaining accretable yield will accrete into income based on the Company’s most recent estimates of cash flows for PCI loans:
	(Dollars in thousands)
	Periods ending December 31,
	2014		$	26,482
	2015		86,888
	2016		62,361
	2017		42,443
	2018		28,143
	Thereafter		60,870
	Total		$	307,187
	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.
	Because of the loss protection provided by the FDIC, the risks of covered loans and foreclosed real estate are significantly different from those assets not covered under the loss share agreement. Refer to Note 7 – Other Real Estate Owned for the covered balances of other real estate owned.
	Non-covered Loans
	The following is a summary of the major categories of non-covered loans outstanding as of September 30, 2014 and December 31, 2013:
	(Dollars in thousands)		Non-PCI Loans
	September 30, 2014		New				Acquired				PCI Loans				Total
															Non-covered
															Loans
	Non-owner occupied commercial real estate		$	327,458			$	61,027			$	369,945			$	758,430
	Other commercial construction and land		88,013				266				141,762				230,041
	Multifamily commercial real estate		27,439				13,863				25,109				66,411
	1-4 family residential construction and land		65,428				—				11,014				76,442
	Total commercial real estate		508,338				75,156				547,830				1,131,324
	Owner occupied commercial real estate		700,945				40,683				228,602				970,230
	Commercial and industrial loans		836,036				13,362				102,429				951,827
	Lease financing		2,175				—				—				2,175
	Total commercial		1,539,156				54,045				331,031				1,924,232
1-4 family residential		523,598				45,826				286,913				856,337
Home equity loans		87,047				159,270				85,689				332,006
Other consumer loans		230,889				4,944				6,543				242,376
Total consumer		841,534				210,040				379,145				1,430,719
Other		70,180				3,664				42,815				116,659
Total loans		$	2,959,208			$	342,905			$	1,300,821			$	4,602,934
(Dollars in thousands)		Non-PCI Loans
December 31, 2013		New				Acquired				PCI Loans				Total
														Non-covered
														Loans
Non-owner occupied commercial real estate		$	219,482			$	68,080			$	432,437			$	719,999
Other commercial construction and land		67,537				252				213,543				281,332
Multifamily commercial real estate		12,537				16,650				29,392				58,579
1-4 family residential construction and land		56,978				1				14,372				71,351
Total commercial real estate		356,534				84,983				689,744				1,131,261
Owner occupied commercial real estate		642,794				48,459				299,593				990,846
Commercial and industrial loans		643,044				20,519				129,961				793,524
Lease financing		2,676				—				—				2,676
Total commercial		1,288,514				68,978				429,554				1,787,046
1-4 family residential		332,585				52,078				349,060				733,723
Home equity loans		52,918				181,138				100,995				335,051
Other consumer loans		151,584				6,407				12,433				170,424
Total consumer		537,087				239,623				462,488				1,239,198
Other		57,320				3,959				47,888				109,167
Total loans		$	2,239,455			$	397,543			$	1,629,674			$	4,266,672
Covered Loans
The following is a summary of the major categories of covered loans outstanding as of September 30, 2014, and December 31, 2013:
(Dollars in thousands)		Non-PCI Loans
September 30, 2014		New				Acquired				PCI Loans				Total
														Covered
														Loans
Non-owner occupied commercial real estate		$	—			$	—			$	38,767			$	38,767
Other commercial construction and land		—				—				13,522				13,522
Multifamily commercial real estate		—				—				4,708				4,708
1-4 family residential construction and land		—				—				—				—
Total commercial real estate		—				—				56,997				56,997
Owner occupied commercial real estate		—				—				56,623				56,623
Commercial and industrial loans		—				193				7,621				7,814
Lease financing		—				—				—				—
Total commercial		—				193				64,244				64,437
1-4 family residential		—				1,330				55,552				56,882
Home equity loans		—				31,786				9,812				41,598
Other consumer loans		—				—				75				75
Total consumer		—				33,116				65,439				98,555
Other		—				—				848				848
Total loans		$	—			$	33,309			$	187,528			$	220,837
(Dollars in thousands)		Non-PCI Loans
December 31, 2013		New				Acquired				PCI Loans				Total Covered
														Loans
Non-owner occupied commercial real estate		$	—			$	—			$	55,734			$	55,734
Other commercial construction and land		—				—				19,162				19,162
Multifamily commercial real estate		—				—				9,109				9,109
1-4 family residential construction and land		—				—				—				—
Total commercial real estate		—				—				84,005				84,005
Owner occupied commercial real estate		—				—				67,302				67,302
Commercial and industrial loans		—				356				9,856				10,212
Lease financing		—				—				—				—
Total commercial		—				356				77,158				77,514
1-4 family residential		—				1,017				69,582				70,599
Home equity loans		—				36,114				15,201				51,315
Other consumer loans		—				—				102				102
Total consumer		—				37,131				84,885				122,016
Other		—				—				1,822				1,822
Total loans		$	—			$	37,487			$	247,870			$	285,357
The following tables present the aging of the recorded investment in past due loans, based on contractual terms, as of September 30, 2014:
(Dollars in thousands)	30-89 Days Past Due								Greater than 90 Days Past Due								Non-accrual
									and Still Accruing/Accreting
Non-purchased credit impaired loans	Non-Covered				Covered				Non-Covered				Covered				Non-Covered		Covered		Total
Non-owner occupied commercial real estate	$	—			$	—			$	—			$	—			$	517	$	—	$	517
Other commercial construction and land	23				—				—				—				255		—		278
Multifamily commercial real estate	—				—				—				—				—		—		—
1-4 family residential construction and land	—				—				—				—				168		—		168
Total commercial real estate	23				—				—				—				940		—		963
Owner occupied commercial real estate	1,373				—				—				—				2,605		—		3,978
Commercial and industrial loans	106				—				—				—				3,154		66		3,326
Lease financing	—				—				—				—				—		—		—
Total commercial	1,479				—				—				—				5,759		66		7,304
1-4 family residential	190				45				—				—				527		27		789
Home equity loans	615				241				—				—				1,691		830		3,377
Other consumer loans	2,579				—				—				—				740		—		3,319
Total consumer	3,384				286				—				—				2,958		857		7,485
Other	—				—				—				—				10		—		10
Total loans	$	4,886			$	286			$	—			$	—			$	9,667	$	923	$	15,762
(Dollars in thousands)	30-89 Days Past Due								Greater than 90 Days Past Due								Non-accrual
									and Still Accruing/Accreting
Purchased credit impaired loans	Non-Covered				Covered				Non-Covered				Covered				Non-Covered		Covered		Total
Non-owner occupied commercial real estate	$	699			$	262			$	26,491			$	4,122			$	—	$	—	$	31,574
Other commercial construction and land	190				15				30,857				6,983				—		—		38,045
Multifamily commercial real estate	—				—				2,098				—				—		—		2,098
1-4 family residential construction and land	—				—				1,212				—				—		—		1,212
Total commercial real estate	889				277				60,658				11,105				—		—		72,929
Owner occupied commercial real estate	1,138				214				17,607				3,038				—		—		21,997
Commercial and industrial loans	750				239				24,608				128				—		—		25,725
Lease financing	—				—				—				—				—		—		—
Total commercial	1,888				453				42,215				3,166				—		—		47,722
1-4 family residential	3,444				220				27,803				7,691				—		—		39,158
Home equity loans	1,162				75				4,740				1,396				—		—		7,373
Other consumer loans	202				—				176				27				—		—		405
Total consumer	4,808				295				32,719				9,114				—		—		46,936
Other	81				—				2,693				—				—		—		2,774
Total loans	$	7,666			$	1,025			$	138,285			$	23,385			$	—	$	—	$	170,361
The following tables present the aging of the recorded investment in past due loans, based on contractual terms, as of December 31, 2013:
(Dollars in thousands)	30-89 Days Past Due								Greater than 90 Days Past Due								Non-accrual
									and Still Accruing/Accreting
Non-purchased credit impaired loans	Non-Covered				Covered				Non-Covered				Covered				Non-Covered		Covered		Total
Non-owner occupied commercial real estate	$	—			$	—			$	—			$	—			$	90	$	—	$	90
Other commercial construction and land	—				—				—				—				563		—		563
Multifamily commercial real estate	305				—				—				—				—		—		305
1-4 family residential construction and land	—				—				—				—				1		—		1
Total commercial real estate	305				—				—				—				654		—		959
Owner occupied commercial real estate	20				—				—				—				3,394		—		3,414
Commercial and industrial loans	2				—				—				—				1,879		66		1,947
Lease financing	—				—				—				—				—		—		—
Total commercial	22				—				—				—				5,273		66		5,361
1-4 family residential	862				—				—				—				1,417		—		2,279
Home equity loans	1,046				146				—				—				2,324		1,270		4,786
Other consumer loans	1,800				—				—				—				806		—		2,606
Total consumer	3,708				146				—				—				4,547		1,270		9,671
Total loans	$	4,035			$	146			$	—			$	—			$	10,474	$	1,336	$	15,991
(Dollars in thousands)	30-89 Days Past Due								Greater than 90 Days Past Due								Non-accrual
									and Still Accruing/Accreting
Purchased credit impaired loans	Non-Covered				Covered				Non-Covered				Covered				Non-Covered		Covered		Total
Non-owner occupied commercial real estate	$	1,463			$	107			$	35,563			$	10,658			$	—	$	—	$	47,791
Other commercial construction and land	1,105				—				58,633				8,479				—		—		68,217
Multifamily commercial real estate	—				—				2,641				—				—		—		2,641
1-4 family residential construction and land	5				—				1,796				—				—		—		1,801
Total commercial real estate	2,573				107				98,633				19,137				—		—		120,450
Owner occupied commercial real estate	4,626				260				33,974				6,631				—		—		45,491
Commercial and industrial loans	249				—				29,819				1,597				—		—		31,665
Lease financing	—				—				—				—				—		—		—
Total commercial	4,875				260				63,793				8,228				—		—		77,156
1-4 family residential	6,696				227				37,646				10,824				—		—		55,393
Home equity loans	1,733				59				7,313				1,227				—		—		10,332
Other consumer loans	344				—				1,249				67				—		—		1,660
Total consumer	8,773				286				46,208				12,118				—		—		67,385
Other	433				—				4,745				954				—		—		6,132
Total loans	$	16,654			$	653			$	213,379			$	40,437			$	—	$	—	$	271,123
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 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 September 30, 2014:
									Substandard
(Dollars in thousands)	Pass				Special Mention				Accruing/				Non-accrual				Doubtful		Total
									Accreting
Non-owner occupied commercial real estate	$	386,116			$	963			$	889			$	517			$	—	$	388,485
Other commercial construction and land	87,412				612				—				255				—		88,279
Multifamily commercial real estate	41,302				—				—				—				—		41,302
1-4 family residential construction and land	62,988				78				2,194				168				—		65,428
Total commercial real estate	577,818				1,653				3,083				940				—		583,494
Owner occupied commercial real estate	726,576				4,671				7,777				2,604				—		741,628
Commercial and industrial loans	841,717				234				4,419				3,221				—		849,591
Lease financing	2,175				—				—				—				—		2,175
Total commercial	1,570,468				4,905				12,196				5,825				—		1,593,394
1-4 family residential	569,955				151				94				554				—		570,754
Home equity loans	273,315				—				2,267				2,521				—		278,103
Other consumer loans	235,093				—				—				740				—		235,833
Total consumer	1,078,363				151				2,361				3,815				—		1,084,690
Other	73,584				—				250				10				—		73,844
Total loans	$	3,300,233			$	6,709			$	17,890			$	10,590			$	—	$	3,335,422
The following table summarizes loans, excluding PCI loans by internal rating at December 31, 2013:
									Substandard
(Dollars in thousands)	Pass				Special Mention				Accruing/				Non-accrual				Doubtful		Total
									Accreting
Non-owner occupied commercial real estate	$	285,919			$	568			$	985			$	90			$	—	$	287,562
Other commercial construction and land	67,178				48				—				563				—		67,789
Multifamily commercial real estate	28,882				—				305				—				—		29,187
1-4 family residential construction and land	53,224				1,958				1,796				1				—		56,979
Total commercial real estate	435,203				2,574				3,086				654				—		441,517
Owner occupied commercial real estate	681,571				4,093				2,195				3,394				—		691,253
Commercial and industrial loans	651,585				1,183				9,206				1,945				—		663,919
Lease financing	2,676				—				—				—				—		2,676
Total commercial	1,335,832				5,276				11,401				5,339				—		1,357,848
1-4 family residential	384,235				28				—				1,417				—		385,680
Home equity loans	263,490				37				3,050				3,593				—		270,170
Other consumer loans	157,157				—				28				806				—		157,991
Total consumer	804,882				65				3,078				5,816				—		813,841
Other	61,006				—				273				—				—		61,279
Total loans	$	2,636,923			$	7,915			$	17,838			$	11,809			$	—	$	2,674,485

Allowance_for_Loan_Losses

Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
Allowance for Loan Losses	'
	Allowance for Loan Losses
	Activity in the allowance for loan losses for the three and nine months ended September 30, 2014 and 2013 is as follows:
	(Dollars in thousands)		Three Months Ended								Nine Months Ended
			30-Sep-14				30-Sep-13				30-Sep-14				30-Sep-13
	Balance, beginning of period		$	55,307			$	56,832			$	56,851			$	57,262
	Reversal of provision for loan losses for PCI loans		(4,205		)		(72		)		(7,633		)		(703		)
	Provision for loan losses for non-PCI loans		2,873				1,056				7,681				11,556
	Non-PCI loans charged-off		(2,306		)		(1,945		)		(6,438		)		(15,335		)
	Recoveries of non-PCI loans previously charged-off		665				522				1,873				3,613
	Balance, end of period		$	52,334			$	56,393			$	52,334			$	56,393
	The following tables present the roll forward of the allowance for loan losses for the three and nine months ended September 30, 2014 by the class of loans against which the allowance is allocated:
	(Dollars in thousands)		June 30, 2014				Provision/				Net (Charge-offs)/				30-Sep-14
							(Reversals)				Recoveries
	Non-owner occupied commercial real estate		$	4,487			$	(1,772	)		$	119			$	2,834
	Other commercial construction and land		11,502				1,401				11				12,914
	Multifamily commercial real estate		480				(17		)		—				463
	1-4 family residential construction and land		1,631				(386		)		(2		)		1,243
	Total commercial real estate		18,100				(774		)		128				17,454
	Owner occupied commercial real estate		3,317				(430		)		(10		)		2,877
	Commercial and industrial loans		8,645				(113		)		(177		)		8,355
	Lease financing		1				—				—				1
	Total commercial		11,963				(543		)		(187		)		11,233
	1-4 family residential		17,138				(1,250		)		(8		)		15,880
	Home equity loans		4,290				(371		)		(299		)		3,620
	Other consumer loans		3,431				1,244				(851		)		3,824
	Total consumer		24,859				(377		)		(1,158		)		23,324
	Other		385				362				(424		)		323
	Total loans		$	55,307			$	(1,332	)		$	(1,641	)		$	52,334
	(Dollars in thousands)		December 31, 2013				Provision/				Net(Charge-offs)/				30-Sep-14
							(Reversals)				Recoveries
	Non-owner occupied commercial real estate		$	4,635			$	(1,806	)		$	5			$	2,834
	Other commercial construction and land		8,217				4,881				(184		)		12,914
	Multifamily commercial real estate		320				143				—				463
	1-4 family residential construction and land		1,558				(315		)		—				1,243
	Total commercial real estate		14,730				2,903				(179		)		17,454
	Owner occupied commercial real estate		4,450				(1,443		)		(130		)		2,877
	Commercial and industrial loans		8,310				217				(172		)		8,355
	Lease financing		3				(2		)		—				1
	Total commercial		12,763				(1,228		)		(302		)		11,233
	1-4 family residential		21,724				(5,742		)		(102		)		15,880
	Home equity loans		3,869				530				(779		)		3,620
	Other consumer loans		2,682				3,267				(2,125		)		3,824
	Total consumer		28,275				(1,945		)		(3,006		)		23,324
	Other		1,083				318				(1,078		)		323
	Total loans		$	56,851			$	48			$	(4,565	)		$	52,334
	The following tables present the roll forward of the allowance for loan losses for the three and nine months ended September 30, 2013 by the class of loans against which the allowance is allocated:
	(Dollars in thousands)		June 30, 2013				Provision/				Net(Charge-offs)/				30-Sep-13
							(Reversals)				Recoveries
	Non-owner occupied commercial real estate		$	4,329			$	2,344			$	11			$	6,684
	Other commercial construction and land		12,310				(1,201		)		85				11,194
	Multifamily commercial real estate		258				44				—				302
	1-4 family residential construction and land		1,806				353				2				2,161
	Total commercial real estate		18,703				1,540				98				20,341
	Owner occupied commercial real estate		4,696				357				17				5,070
	Commercial and industrial loans		8,288				(264		)		(466		)		7,558
	Lease financing		—				3				—				3
	Total commercial		12,984				96				(449		)		12,631
	1-4 family residential		17,572				(1,040		)		51				16,583
	Home equity loans		3,937				(40		)		(120		)		3,777
	Other consumer loans		2,361				734				(565		)		2,530
	Total consumer		23,870				(346		)		(634		)		22,890
	Other		1,275				(306		)		(438		)		531
	Total loans		$	56,832			$	984			$	(1,423	)		$	56,393
(Dollars in thousands)		31-Dec-12				Provision/				Net (Charge-offs)/				30-Sep-13
						(Reversals)				Recoveries
Non-owner occupied commercial real estate		$	3,764			$	2,936			$	(16	)		$	6,684
Other commercial construction and land		12,711				(2,120		)		603				11,194
Multifamily commercial real estate		348				(87		)		41				302
1-4 family residential construction and land		1,716				420				25				2,161
Total commercial real estate		18,539				1,149				653				20,341
Owner occupied commercial real estate		4,055				732				283				5,070
Commercial and industrial loans		7,490				8,885				(8,817		)		7,558
Lease financing		—				3				—				3
Total commercial		11,545				9,620				(8,534		)		12,631
1-4 family residential		15,740				772				71				16,583
Home equity loans		8,670				(3,861		)		(1,032		)		3,777
Other consumer loans		2,082				2,097				(1,649		)		2,530
Total consumer		26,492				(992		)		(2,610		)		22,890
Other		686				1,076				(1,231		)		531
Total loans		$	57,262			$	10,853			$	(11,722	)		$	56,393
The following tables present the roll forward of the allowance for loan losses for PCI and non-PCI loans for the three and nine months ended September 30, 2014 and 2013, by the class of loans against which the allowance is allocated:
	Three Months Ended
(Dollars in thousands)	30-Sep-14												30-Sep-13
	Non-PCI				PCI				Total				Non-PCI				PCI			Total
Allowance for loan losses at the beginning of the period	$	20,835			$	34,472			$	55,307			$	17,640			$	39,192		$	56,832
Charge-offs:
Non-owner occupied commercial real estate	(88		)		—				(88		)		—				—			—
Other commercial construction and land	—				—				—				(50		)		—			(50		)
Multifamily commercial real estate	—				—				—				—				—			—
1-4 family residential construction and land	(4		)		—				(4		)		—				—			—
Total commercial real estate	(92		)		—				(92		)		(50		)		—			(50		)
Owner occupied commercial real estate	(12		)		—				(12		)		—				—			—
Commercial and industrial loans	(283		)		—				(283		)		(544		)		—			(544		)
Lease financing	—				—				—				—				—			—
Total commercial	(295		)		—				(295		)		(544		)		—			(544		)
1-4 family residential	(13		)		—				(13		)		(9		)		—			(9		)
Home equity loans	(337		)		—				(337		)		(3		)		—			(3		)
Other consumer loans	(984		)		—				(984		)		(685		)		—			(685		)
Total consumer	(1,334		)		—				(1,334		)		(697		)		—			(697		)
Other	(585		)		—				(585		)		(654		)		—			(654		)
Total charge-offs	(2,306		)		—				(2,306		)		(1,945		)		—			(1,945		)
Recoveries:
Non-owner occupied commercial real estate	207				—				207				11				—			11
Other commercial construction and land	11				—				11				135				—			135
Multifamily commercial real estate	—				—				—				—				—			—
1-4 family residential construction and land	2				—				2				2				—			2
Total commercial real estate	220				—				220				148				—			148
Owner occupied commercial real estate	2				—				2				17				—			17
Commercial and industrial loans	106				—				106				78				—			78
Lease financing	—				—				—				—				—			—
Total commercial	108				—				108				95				—			95
1-4 family residential	5				—				5				60				—			60
Home equity loans	38				—				38				(117		)		—			(117		)
Other consumer loans	133				—				133				120				—			120
Total consumer	176				—				176				63				—			63
Other	161				—				161				216				—			216
Total recoveries	665				—				665				522				—			522
Net charge-offs	(1,641		)		—				(1,641		)		(1,423		)		—			(1,423		)
Provision (reversal) for loan losses:
Non-owner occupied commercial real estate	(76		)		(1,696		)		(1,772		)		153				2,191			2,344
Other commercial construction and land	493				908				1,401				(242		)		(959		)	(1,201		)
Multifamily commercial real estate	23				(40		)		(17		)		(13		)		57			44
1-4 family residential construction and land	(70		)		(316		)		(386		)		38				315			353
Total commercial real estate	370				(1,144		)		(774		)		(64		)		1,604			1,540
Owner occupied commercial real estate	(29		)		(401		)		(430		)		(99		)		456			357
Commercial and industrial loans	66				(179		)		(113		)		47				(311		)	(264		)
Lease financing	—				—				—				3				—			3
Total commercial	37				(580		)		(543		)		(49		)		145			96
1-4 family residential	395				(1,645		)		(1,250		)		87				(1,127		)	(1,040		)
Home equity loans	389				(760		)		(371		)		(6		)		(34		)	(40		)
Other consumer loans	1,239				5				1,244				711				23			734
Total consumer	2,023				(2,400		)		(377		)		792				(1,138		)	(346		)
Other	443				(81		)		362				377				(683		)	(306		)
Total provision (reversal) for loan losses	2,873				(4,205		)		(1,332		)		1,056				(72		)	984
Allowance for loan losses at the end of the period	$	22,067			$	30,267			$	52,334			$	17,273			$	39,120		$	56,393
(Dollars in thousands)	Nine Months Ended
	30-Sep-14												30-Sep-13
	Non-PCI				PCI				Total				Non-PCI				PCI			Total
Allowance for loan losses at the beginning of the period	$	18,951			$	37,900			$	56,851			$	17,439			$	39,823		$	57,262
Charge-offs:
Non-owner occupied commercial real estate	(292		)		—				(292		)		(92		)		—			(92		)
Other commercial construction and land	(207		)		—				(207		)		(152		)		—			(152		)
Multifamily commercial real estate	—				—				—				—				—			—
1-4 family residential construction and land	(6		)		—				(6		)		—				—			—
Total commercial real estate	(505		)		—				(505		)		(244		)		—			(244		)
Owner occupied commercial real estate	(156		)		—				(156		)		—				—			—
Commercial and industrial loans	(444		)		—				(444		)		(9,555		)		—			(9,555		)
Lease financing	—				—				—				—				—			—
Total commercial	(600		)		—				(600		)		(9,555		)		—			(9,555		)
1-4 family residential	(114		)		—				(114		)		(37		)		—			(37		)
Home equity loans	(931		)		—				(931		)		(1,370		)		—			(1,370		)
Other consumer loans	(2,572		)		—				(2,572		)		(2,066		)		—			(2,066		)
Total consumer	(3,617		)		—				(3,617		)		(3,473		)		—			(3,473		)
Other	(1,716		)		—				(1,716		)		(2,063		)		—			(2,063		)
Total charge-offs	(6,438		)		—				(6,438		)		(15,335		)		—			(15,335		)
Recoveries:
Non-owner occupied commercial real estate	297				—				297				76				—			76
Other commercial construction and land	23				—				23				755				—			755
Multifamily commercial real estate	—				—				—				41				—			41
1-4 family residential construction and land	6				—				6				25				—			25
Total commercial real estate	326				—				326				897				—			897
Owner occupied commercial real estate	26				—				26				283				—			283
Commercial and industrial loans	272				—				272				738				—			738
Lease financing	—				—				—				—				—			—
Total commercial	298				—				298				1,021				—			1,021
1-4 family residential	12				—				12				108				—			108
Home equity loans	152				—				152				338				—			338
Other consumer loans	447				—				447				417				—			417
Total consumer	611				—				611				863				—			863
Other	638				—				638				832				—			832
Total recoveries	1,873				—				1,873				3,613				—			3,613
Net charge-offs	(4,565		)		—				(4,565		)		(11,722		)		—			(11,722		)
Provision (reversal) for loan losses:
Non-owner occupied commercial real estate	105				(1,911		)		(1,806		)		(46		)		2,982			2,936
Other commercial construction and land	992				3,889				4,881				(769		)		(1,351		)	(2,120		)
Multifamily commercial real estate	(1		)		144				143				(60		)		(27		)	(87		)
1-4 family residential construction and land	(140		)		(175		)		(315		)		145				275			420
Total commercial real estate	956				1,947				2,903				(730		)		1,879			1,149
Owner occupied commercial real estate	10				(1,453		)		(1,443		)		(654		)		1,386			732
Commercial and industrial loans	448				(231		)		217				8,226				659			8,885
Lease financing	(2		)		—				(2		)		3				—			3
Total commercial	456				(1,684		)		(1,228		)		7,575				2,045			9,620
1-4 family residential	952				(6,694		)		(5,742		)		232				540			772
Home equity loans	1,003				(473		)		530				1,014				(4,875		)	(3,861		)
Other consumer loans	3,326				(59		)		3,267				2,234				(137		)	2,097
Total consumer	5,281				(7,226		)		(1,945		)		3,480				(4,472		)	(992		)
Other	988				(670		)		318				1,231				(155		)	1,076
Total provision (reversal) for loan losses	7,681				(7,633		)		48				11,556				(703		)	10,853
Allowance for loan losses at the end of the period	$	22,067			$	30,267			$	52,334			$	17,273			$	39,120		$	56,393
The following table presents the balance in the allowance for loan losses and the recorded investment in loans by class of loan and by impairment evaluation method as of September 30, 2014:
(Dollars in thousands)	Allowance for Loan Losses												Loans
	Individually				Collectively				Purchased				Individually				Collectively			Purchased
	Evaluated				Evaluated				Credit-				Evaluated				Evaluated			Credit-
	for				for				Impaired				for				for			Impaired
	Impairment				Impairment								Impairment				Impairment (1)
Non-owner occupied commercial real estate	$	—			$	1,725			$	1,109			$	—			$	388,485		$	408,712
Other commercial construction and land	—				2,009				10,905				—				88,279			155,284
Multifamily commercial real estate	—				115				348				—				41,302			29,817
1-4 family residential construction and land	—				925				318				—				65,428			11,014
Total commercial real estate	—				4,774				12,680				—				583,494			604,827
Owner occupied commercial real estate	—				2,491				386				3,503				738,125			285,225
Commercial and industrial loans	—				7,153				1,202				6,095				843,496			110,050
Lease financing	—				1				—				—				2,175			—
Total commercial	—				9,645				1,588				9,598				1,583,796			395,275
1-4 family residential	—				3,129				12,751				—				564,315			342,465
Home equity loans	26				596				2,998				304				277,799			95,501
Other consumer loans	8				3,511				305				129				235,704			6,618
Total consumer	34				7,236				16,054				433				1,077,818			444,584
Other	—				378				(55		)		—				73,844			43,663
Total loans	$	34			$	22,033			$	30,267			$	10,031			$	3,318,952		$	1,488,349
-1	Loans collectively evaluated for impairment include $375.5 million of acquired loans which are presented net of unamortized purchase discounts of $13.1 million.
The following table presents the balance in the allowance for loan losses and the recorded investment in loans by class of loan and by impairment evaluation method as of December 31, 2013:
(Dollars in thousands)	Allowance for Loan Losses												Loans
	Individually				Collectively				Purchased				Individually				Collectively			Purchased
	Evaluated				Evaluated				Credit-				Evaluated				Evaluated			Credit-
	for				for				Impaired				for				for			Impaired
	Impairment				Impairment								Impairment				Impairment (1)
Non-owner occupied commercial real estate	$	—			$	1,615			$	3,020			$	877			$	286,685		$	488,171
Other commercial construction and land	—				1,201				7,016				—				67,789			232,705
Multifamily commercial real estate	—				116				204				—				29,187			38,501
1-4 family residential construction and land	—				1,065				493				—				56,979			14,372
Total commercial real estate	—				3,997				10,733				877				440,640			773,749
Owner occupied commercial real estate	—				2,611				1,839				4,844				686,409			366,895
Commercial and industrial loans	507				6,370				1,433				9,623				654,296			139,817
Lease financing	—				3				—				—				2,676			—
Total commercial	507				8,984				3,272				14,467				1,343,381			506,712
1-4 family residential	—				2,279				19,445				—				377,668			418,642
Home equity loans	—				398				3,471				—				270,170			116,196
Other consumer loans	5				2,313				364				207				157,784			12,535
Total consumer	5				4,990				23,280				207				805,622			547,373
Other	—				468				615				273				61,006			49,710
Total loans	$	512			$	18,439			$	37,900			$	15,824			$	2,650,649		$	1,877,544
-1	Loans collectively evaluated for impairment include $435.0 million of acquired loans which are presented net of unamortized purchase discounts of $14.7 million.
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 losses is established for the loan. During the three and nine months ended September 30, 2014, loans modified in TDRs were nominal. Because of the immateriality 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 losses at September 30, 2014. The Company had loans modified in TDRs with recorded investments of $1.2 million and $3.7 million for the three and nine months ended September 30, 2014, respectively. The Company had loans modified in TDRs with recorded investments of $1.2 million and $1.4 million for the three and nine months ended September 30, 2013.

FDIC_Indemnification_Asset

FDIC Indemnification Asset	9 Months Ended
	Sep. 30, 2014
Text Block [Abstract]	'
FDIC Indemnification Asset	'
	FDIC Indemnification Asset
	The Company has recorded an indemnification asset related to loss sharing agreements entered into with the FDIC wherein the FDIC will reimburse the Company for certain amounts related to certain acquired loans and other real estate owned should the Company experience a loss. Under the loss sharing arrangements, the FDIC has agreed to absorb 80% of all future credit losses and workout expenses on these assets which occur prior to the expiration of the loss sharing agreements. These agreements resulted from the purchase of the Failed Banks.
	The loss sharing agreements consist of three (one for each Failed Bank) single-family shared-loss agreements and three (one for each Failed Bank) commercial and other loans shared-loss agreements. The single family shared-loss agreements provide for FDIC loss sharing and our reimbursement for recoveries to the FDIC for ten years from July 16, 2010 for single-family residential loans. The commercial shared-loss agreements provide for FDIC loss sharing for five years from July 16, 2010 and our reimbursement for recoveries to the FDIC for eight years from July 16, 2010 for all other covered assets.
	The following is a summary of the activity in the FDIC indemnification asset:
	(Dollars in thousands)
	Balance, December 31, 2013	$	33,610
	Indemnification asset expense	(977		)
	Amortization of indemnification asset	(7,133		)
	Cash received on reimbursable losses	(4,475		)
	Balance, September 30, 2014	$	21,025
	Balance, December 31, 2012	$	49,417
	Indemnification asset income	2,003
	Amortization of indemnification asset	(5,782		)
	Cash received on reimbursable losses	(8,801		)
	Balance, September 30, 2013	$	36,837

Other_Real_Estate_Owned

Other Real Estate Owned	9 Months Ended
	Sep. 30, 2014
Banking and Thrift [Abstract]	'
Other Real Estate Owned	'
	Other Real Estate Owned
	The activity within Other Real Estate Owned (“OREO”) for the three and nine months ended September 30, 2014 and 2013 is presented in the table below. Ending balances for OREO covered by loss sharing agreements with the FDIC as of September 30, 2014 and 2013 were $14.9 million and $27.3 million, respectively. Non-covered OREO ending balances as of September 30, 2014 and 2013 were $75.4 million and $102.4 million, respectively.
	For the three and nine months ended September 30, 2014, proceeds on sales of OREO were $16.0 million and $64.4 million, respectively. Net gains on sales were $0.2 million and $4.1 million, respectively. For the three and nine months ended September 30, 2013, proceeds on sales of OREO were $17.5 million and $62.2 million, respectively. Net losses on sales were $0.2 million for the three months ended September 30, 2013 and net gains were $3.2 million for the nine months ended September 30, 2013.
	(Dollars in thousands)	Three Months Ended						Nine Months Ended
		30-Sep-14			30-Sep-13			30-Sep-14			30-Sep-13
	Balance, beginning of period	$	96,283		$	142,793		$	129,396		$	154,093
	Real estate acquired from borrowers	12,590			10,585			30,452			53,366
	Valuation allowance	(2,752		)	(6,045		)	(9,347		)	(18,844		)
	Properties sold	(15,844		)	(17,679		)	(60,224		)	(58,961		)
	Balance, end of period	$	90,277		$	129,654		$	90,277		$	129,654

Federal_Home_Loan_Bank_Advance

Federal Home Loan Bank Advances and Short-Term Borrowings	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [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 and advances from the Federal Home Loan Bank (“FHLB”).
	The Bank has securities sold under agreements to repurchase with customers. These agreements are collateralized by investment securities of the United States Government or its agencies which are chosen by the Bank. The amounts outstanding at September 30, 2014 and December 31, 2013 were $23.8 million and $24.9 million, 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 September 30, 2014 and December 31, 2013 provided for incremental borrowing availability of up to $58.7 million and $95.4 million, respectively.
	At September 30, 2014 and December 31, 2013, the Bank had $25.7 million and $25.6 million in letters of credit issued by the FHLB respectively, of which $25.2 million are used as collateral for public fund deposits in lieu of pledging securities to the State of Florida.
	The advances as of September 30, 2014 and December 31, 2013 consisted of the following:
	(Dollars in thousands)
	Contractual
	Outstanding
	Amount
	30-Sep-14		Maturity Date	Fixed Contractual Rate
	$	50,000	October 23, 2014	0.24%
	40,000		November 25, 2014	0.22%
	60,000		December 26, 2014	0.18%
	75,000		May 19, 2015	0.36%
	614		November 6, 2017	0.50%
	524		February 10, 2026	—%
	$	226,138
	(Dollars in thousands)
	Contractual
	Outstanding
	Amount
	31-Dec-13		Maturity Date	Fixed Contractual Rate
	$	95,000	May 16, 2014	0.36%
	724		November 6, 2017	0.50%
	554		February 10, 2026	—%
	$	96,278

LongTerm_Borrowings

Long-Term Borrowings	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Long-Term Borrowings	'
	Long-Term Borrowings
	Structured repurchase agreements
	The repurchase agreements as of September 30, 2014 and December 31, 2013 consisted of the following:
	(Dollars in thousands)
	Carrying Amount
	30-Sep-14				31-Dec-13				Contractual Amount				Maturity Date	Contractual Rate
	$	10,611			$	10,823			$	10,000			November 6, 2016	4.75%
	10,646				10,833				10,000				March 30, 2017	4.50%
	10,426				10,521				10,000				December 18, 2017	3.79%
	10,403				10,492				10,000				December 18, 2017	3.72%
	10,674				10,780				10,000				March 22, 2019	3.56%
	$	52,760			$	53,449			$	50,000
	These repurchase agreements have a weighted-average rate of 4.06% at September 30, 2014 and December 31, 2013 and are collateralized by $63.2 million and $62.1 million, respectively, of mortgage-backed securities.
	Subordinated Debentures
	Through its acquisitions of CBKN, GRNB, SCMF and TIBB, the Company assumed thirteen separate pooled offerings of trust preferred securities. 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. On March 18, 2013, the Company called and redeemed $34.5 million of trust preferred securities issued by SCMF, which had a fixed interest rate of 7.95%. The prepayment resulted in a $0.3 million loss on extinguishment of debt. On September 7, 2013 the Company called and redeemed $8.0 million of trust preferred securities issued by TIBB, which had a fixed interest rate of 10.60% The prepayment resulted in a $0.4 million gain on extinguishment of debt.
	The subordinated debentures as of September 30, 2014 and December 31, 2013 consisted of the following:
	(Dollars in thousands)
							Carrying Amount
	Date of Offering		Face Amount				30-Sep-14				31-Dec-13			Interest Rate as of September 30, 2014			Maturity Date
	July 31, 2001		$	5,000			$	3,887			$	3,851		3.82	%	(3 Month LIBOR+358 bps)	July 31, 2031
	July 31, 2001		4,000				2,683				2,636			3.82	%	(3 Month LIBOR+358 bps)	July 31, 2031
	June 26, 2003		10,000				5,992				5,921			3.34	%	(3 Month LIBOR+310 bps)	June 26, 2033
	September 25, 2003		10,000				6,478				6,368			3.08	%	(3 Month LIBOR+285 bps)	September 25, 2033
	December 30, 2003		10,000				5,776				5,704			3.09	%	(3 Month LIBOR+285 bps)	December 30, 2033
	June 28, 2005		3,000				1,582				1,545			1.91	%	(3 Month LIBOR+168 bps)	June 28, 2035
	December 22, 2005		10,000				4,577				4,491			1.63	%	(3 Month LIBOR+140 bps)	March 15, 2036
	December 28, 2005		13,000				6,615				6,458			1.77	%	(3 Month LIBOR+154 bps)	March 15, 2036
	June 23, 2006		20,000				11,417				11,206			1.78	%	(3 Month LIBOR+155 bps)	July 7, 2036
	May 16, 2007		56,000				28,688				28,050			1.88	%	(3 Month LIBOR+165 bps)	June 15, 2037
	June 15, 2007		10,000				5,401				5,327			1.66	%	(3 Month LIBOR+143 bps)	September 6, 2037
			$	151,000			$	83,096			$	81,557
	Other Subordinated Debentures
	Through the acquisition of CBKN, the Company assumed $3.4 million in aggregate principal amount of subordinated promissory notes with a fixed interest rate of 10.0% due March 18, 2020. The notes had a carrying value of $3.5 million and $3.6 million as of September 30, 2014 and December 31, 2013, respectively. The Company may prepay the notes at any time after March 18, 2015 subject to regulatory approval and compliance with applicable law. The Company’s obligation to repay the notes is subordinate to all indebtedness owed by the Company to its current and future secured creditors and general creditors and certain other financial obligations of the Company.
	At September 30, 2014, the maturities of long-term borrowings were as follows:
	(Dollars in thousands)		Fixed Rate				Floating Rate				Total
	Due in 2014 through 2015		$	—			$	—			$	—
	Due in 2016		10,611				—				10,611
	Due in 2017		31,475				—				31,475
	Due in 2018		—				—				—
	Thereafter		14,214				83,096				97,310
	Total		$	56,300			$	83,096			$	139,396

Shareholders_Equity_and_Minimu

Shareholders' Equity and Minimum Regulatory Capital Requirements	9 Months Ended
	Sep. 30, 2014
Banking and Thrift [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 risk-based and Total Risk-based ratios. At September 30, 2014 and December 31, 2013 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
		Requirement		Requirement
	September 30, 2014	Amount	Ratio	Amount	Ratio	Amount		Ratio
	Tier 1 Capital
	(to Average Assets)
	CBF Consolidated	N/A	N/A	$251,319	≥ 4.0%	$	923,231	14.40%
	Capital Bank, N.A.	$313,810	≥ 5.0%	$251,048	≥ 4.0%	$	855,566	13.40%
	Tier 1 Capital
	(to Risk Weighted Assets)
	CBF Consolidated	N/A	N/A	$197,728	≥ 4.0%	$	923,231	18.40%
	Capital Bank, N.A.	$296,245	≥ 6.0%	$197,497	≥ 4.0%	$	855,566	17.10%
	Total Capital
	(to Risk Weighted Assets)
	CBF Consolidated	N/A	N/A	$395,456	≥ 8.0%	$	979,541	19.50%
	Capital Bank, N.A.	$493,742	≥ 10.0%	$394,994	≥ 8.0%	$	911,730	18.20%
	(Dollars in thousands)	Well Capitalized		Adequately Capitalized		Actual
		Requirement		Requirement
	31-Dec-13	Amount	Ratio	Amount	Ratio	Amount		Ratio
	Tier 1 Capital
	(to Average Assets)
	CBF Consolidated	N/A	N/A	$254,126	≥ 4.0%	$	949,619	14.90%
	Capital Bank, N.A.	$317,562	≥ 5.0%	$254,050	≥ 4.0%	$	849,520	13.40%
	Tier 1 Capital
	(to Risk Weighted Assets)
	CBF Consolidated	N/A	N/A	$192,428	≥ 4.0%	$	949,619	19.70%
	Capital Bank, N.A.	$288,410	≥ 6.0%	$192,273	≥ 4.0%	$	849,520	17.70%
	Total Capital
	(to Risk Weighted Assets)
	CBF Consolidated	N/A	N/A	$384,856	≥ 8.0%	$	1,010,422	21.00%
	Capital Bank, N.A.	$480,683	≥ 10.0%	$384,546	≥ 8.0%	$	910,162	18.90%
	In August 2010, Capital Bank, NA entered into an Operating Agreement with the Office of the Comptroller of the Currency (the “OCC Operating Agreement”). At present, the OCC Operating Agreement requires Capital Bank, NA to maintain total capital equal to at least 12% of risk-weighted assets, Tier 1 capital equal to at least 11% of risk-weighted assets and a minimum leverage ratio of 10% (Tier 1 Capital ratio).
	As of September 30, 2014 and December 31, 2013, 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.
	The OCC Operating Agreement prohibited Capital Bank, NA from paying a dividend to the Company for three years following the acquisition of the Failed Banks and, now that the three-year period elapsed, imposes other restrictions on Capital Bank’s ability to pay dividends, including requiring prior approval from the OCC before any distribution is made. 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. On September 5, 2013 and July 8, 2014, the OCC approved dividends to the Company by its subsidiary Capital Bank N.A., of $105.0 million and $56.0 million, respectively.
	Share Repurchases
	During 2013 and 2014, the Company’s Board of Directors authorized stock repurchase plans of up to $200.0 million. Stock repurchases may be made from time to time, on the open market or in privately negotiated transactions. The approved stock repurchase programs do not obligate the Company to repurchase any particular amount of shares, and the programs may be extended, modified, suspended, or discontinued at any time.
	During the three and nine months ended September 30, 2014, the Company repurchased $19.5 million, or 819,773 common shares at an average price of $23.78 per share and $85.4 million, or 3,586,771 common shares at average price of $23.80 per share, respectively.
	As of September 30, 2014, the Company has repurchased a total of $155.3 million, or 7,348,088 common shares at an average price of $21.14 per share with $44.7 million of remaining availability for future share repurchases.
	The Company accounts for treasury stock using the cost method as a reduction of shareholders’ equity in the accompanying consolidated balance sheets and statement of changes in shareholders’ equity.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	Stock-Based Compensation
	As of September 30, 2014, 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 and nine months ended September 30, 2014 and 2013.
	(Dollars in thousands)	Three Months Ended							Nine Months Ended
		30-Sep-14			30-Sep-13				30-Sep-14				30-Sep-13
	Stock options	$	195		$	215			$	560			$	395
	Restricted stock	248			1,156				1,631				3,917
	Total stock-based compensation expense	$	443		$	1,371			$	2,191			$	4,312
	The tax benefit related to stock-based compensation expense arising from restricted stock awards and non-qualified stock options was $0.2 million and $0.5 million for the three months ended September 30, 2014 and 2013, respectively, and $0.9 million and $1.7 million for the nine months ended September 30, 2014 and 2013, 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. No option may be exercised after the expiration of ten years from the date it is granted. No stock options were granted under these plans during the three and nine months ended September 30, 2014.
	During the nine months ended September 30, 2013, 264,000 options were granted to employees. These options vest over service periods of 2 years. 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 volatility was estimated using a peer group assessment for periods approximating the expected option life. Appropriate weight is attributed to financial theory, according to which the volatility of an institution’s equity should be related to the volatility of its assets and the entity’s financial leverage.
	The following table summarizes the weighted average assumptions used to compute the grant-date fair value of options granted during the nine months ended September 30, 2013:
		Nine Months Ended September 30, 2013
	Dividend yield	—%
	Risk-free interest rate	1.00%
	Expected option life	5.75 years
	Volatility	37.00%
	Weighted average grant-date fair value of options granted	$6.52
	ASC 718 requires the recognition of stock-based compensation for the number of awards that are ultimately expected to vest. During the three and nine months ended September 30, 2014 and 2013, 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 nine months ended September 30, 2014 and 2013 is as follows:
		Nine Months Ended
		September 30, 2014						September 30, 2013
	(Shares in thousands)	Shares		Weighted				Shares			Weighted
				Average							Average
				Exercise Price Per Share							Exercise Price
											Per Share
	Balance, January 1,	3,123		$	20.5			2,890			$	21.39
	Granted	—		—				264			18
	Exercised	—		—				—			—
	Canceled, expired or forfeited	(11	)	75.94				(21	)		113.8
	Balance, September 30,	3,112		$	20.3			3,133			$	20.5
	The weighted average remaining contractual life for outstanding stock options was approximately 5.90 years at September 30, 2014. The aggregate intrinsic value at September 30, 2014 was $12.5 million and $11.8 million for stock options outstanding and exercisable, respectively.
	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 September 30, 2014 were as follows:
	(Shares in thousands)	Outstanding Options								Exercisable Options
	Range of Exercise Prices	Shares		Weighted		Weighted				Shares			Weighted
				Average		Average							Average
				Remaining		Exercise Price							Exercise Price
				Contractual		Per							Per
				Life		Share							Share
	$18.00	236		8.64 years		$	18			118			$	18
	$20.00	2,864		5.68 years		20				2,864			20
	$28.44 - $2,026.00	12		3.23 years		138.87				12			138.87
	$18.00 - $2,026.00	3,112		5.90 years		$	20.3			2,994			$	20.39
	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 terms of the restricted stock awards granted to employees provide for vesting upon the achievement of stock price goals as follows: (1) one-third at $25.00 per share; (2) one-third at $28.00 per share; and (3) one-third at $32.00 per share. Achievement of stock price goals is generally defined as the average closing price of the shares for any consecutive 30-day trading period exceeding the applicable price target. The value of the restricted stock is being amortized on a straight-line basis over the implied service periods. No restricted stock awards were granted under the 2013 Plan during the three and nine months ended September 30, 2014.
	On May 21, 2013, 4,000 restricted stock awards were granted under the 2010 Plan. The fair value of the restricted stock was estimated to be equal to the closing stock price on the grant date.
	On April 2, 2014, 405,133 restricted stock awards vested upon achievement of the $25.00 stock price goal. The Company recognized $1.7 million in excess tax benefits related to the vesting of such awards.The following table summarizes unvested restricted stock activity for the nine months ended September 30, 2014 and 2013:
		Nine Months Ended
		September 30, 2014						September 30, 2013
	(Shares in thousands)	Shares		Weighted				Shares			Weighted
				Average							Average
				Grant-Date							Grant-Date
				Fair Value							Fair Value
				Per Share							Per Share
	Balance, January 1,	1,215		$	14.28			1,212			$	14.27
	Granted	—		—				4			18
	Vested or released	(405	)	15.07				—			—
	Canceled, expired or forfeited	—		—				—			—
	Balance, September 30,	810		$	13.89			1,216			$	14.28
	Full Value Stock Awards
On June 5, 2014, 11,880 shares of stock were granted to Directors under the 2013 Plan. The fair value of each stock award was estimated to be equal to the closing stock price on the date of the grant. The Company recognized the $0.3 million fair value of the stock awards in compensation expense on the grant date.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
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 is as follows for the three and nine months ended September 30, 2014 and 2013:
	(Dollars in thousands)	Three Months Ended						Nine Months Ended
		30-Sep-14			30-Sep-13			30-Sep-14			30-Sep-13
	Income before income taxes	$	21,296		$	20,419		$	59,959		$	46,736
	Income taxes computed at Federal statutory tax rate	7,454			7,147			20,986			16,358
	Effect of:
	State taxes (net of federal benefit)	754			784			2,237			1,795
	State statutory rate change	—			1,545			—			1,545
	Tax-exempt interest income, net	(152		)	(163		)	(485		)	(503		)
	Contingent value right expense	97			(301		)	480			1,156
	Other, net	(100		)	(37		)	(341		)	(253		)
	Total income tax expense	$	8,053		$	8,975		$	22,877		$	20,098
	The Company uses an estimated annual effective tax rate method in computing its interim tax provision. This effective tax rate is based on forecasted annual pre-tax income, permanent tax differences and statutory tax rates. For the three and nine months ended September 30, 2014, the effective income tax rates were 38%. For the three and nine months ended September 30, 2013, the effective income tax rates were 44% and 43%, respectively. The higher prior year effective income tax rates were mainly due to the impact of a $1.5 million charge to income tax expense as a result of changes in certain statutory rates that were enacted into law during the three months ended September 30, 2013.
	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 and North Carolina and Tennessee. The net deferred tax assets as of September 30, 2014 and December 31, 2013 were $139.4 million and $166.8 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 September 30, 2014 and December 31, 2013.
	At September 30, 2014 and December 31, 2013, the Company had no unrecognized tax benefits and no amounts recorded for uncertain tax positions.

Fair_Value

Fair Value	9 Months Ended
	Sep. 30, 2014
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
	For cash & cash equivalents, the carrying value is primarily utilized as a reasonable estimate of fair value.
	Derivative financial instruments
	Fair values for 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 also 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 September 30, 2014, Capital 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 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. We consider 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.
	Sensitivity to Changes in Significant Unobservable Inputs
	As discussed above, as of September 30, 2014, 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 are summarized below as of September 30, 2014:
	(Dollars in thousands)					Fair Value Measurement Using:
			Total			Quoted Prices			Significant		Significant
						in Active			Other		Unobservable
						Markets for			Observable		Inputs
						Identical Assets			Inputs		(Level 3)
						(Level 1)			(Level 2)
	Assets
	Trading securities		$	2,312		$	—		$	2,312	$	—
	Available-for-sale securities:
	Mortgage-backed securities—residential		576,062			—			576,062		—
	Industrial revenue bonds		3,724			—			—		3,724
	Marketable equity securities		946			—			946		—
	Available-for-sale securities		$	580,732		$	—		$	577,008	$	3,724
	Gross asset value of derivatives		$	15		$	—		$	15	$	—
	Liabilities
	Gross liability value of derivatives		$	21		$	—		$	21	$	—
	There were no transfers of assets and liabilities between levels of the fair value hierarchy during the three and nine months ended September 30, 2014.
	Assets and liabilities measured at fair value on a recurring basis are summarized below as of December 31, 2013:
	(Dollars in thousands)					Fair Value Measurement Using:
			Total			Quoted Prices			Significant				Significant
						in Active			Other				Unobservable
						Markets for			Observable				Inputs
						Identical Assets			Inputs				(Level 3)
						(Level 1)			(Level 2)
	Assets
	Trading securities		$	6,348		$	4,477		$	1,871	(1	)	$	—
	Available-for-sale securities:
	Asset-backed securities		133,225			—			133,225				—
	Mortgage-backed securities-residential		546,626			—			546,626				—
	Industrial revenue bonds		3,859			—			—				3,859
	Marketable equity securities		931			—			931		(1	)	—
	Collateralized debt obligations		800			—			800				—
	Available-for-sale securities		$	685,441		$	—		$	681,582			$	3,859
	Gross asset value of derivatives		$	15		$	—		$	15			$	—
	Liabilities
	Gross liability value of derivatives		$	1,330		$	—		$	1,330			$	—
	-1	Transferred from Level 1 to Level 2 due to limited observable market data.
	The tables below present 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 and nine months ended and held at September 30, 2014:
	(Dollars in thousands)	Fair Value Measurement Using
		Significant Unobservable
Inputs (Level 3)
	Industrial
	Revenue Bonds
Beginning balance, June 30, 2014	$	3,736
Included in other comprehensive income	(12		)
Ending balance, September 30, 2014	$	3,724
(Dollars in thousands)	Fair Value Measurement Using
	Significant Unobservable
	Inputs (Level 3)
	Industrial
	Revenue Bonds
Beginning balance, January 1, 2014	$	3,859
Principal reduction	(170		)
Included in other comprehensive income	35
Ending balance, September 30, 2014	$	3,724
The tables below present 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 and nine months ended and held at September 30, 2013:
(Dollars in thousands)		Fair Value Measurement Using Significant
		Unobservable Inputs (Level 3)
		Corporate Bonds			Industrial			Collateralized
					Revenue			Debt
					Bonds			Obligations
Beginning balance, June 30, 2013		$	—		$	3,872		$	301
Included in other comprehensive income		—			93			28
Ending balance, September 30, 2013		$	—		$	3,965		$	329
(Dollars in thousands)		Fair Value Measurement Using Significant
		Unobservable Inputs (Level 3)
		Corporate Bonds			Industrial			Collateralized
					Revenue			Debt
					Bonds			Obligations
Beginning balance, January 1, 2013		$	26		$	3,800		$	297
Included in earnings-gain on sales		199			—			—
Included in other comprehensive income		—			165			32
Sales		(225		)	—			—
Ending balance, September 30, 2013		$	—		$	3,965		$	329
Quantitative Information about Recurring Level 3 Fair Value Measurements
(Dollars in thousands)		Fair Value at			Valuation Technique		Significant	Range
		September 30, 2014					Unobservable
							Input
Industrial revenue bonds		$	3,724		Discounted cash flow		Discount rate	3.20%
							Illiquidity factor	0.50%
(Dollars in thousands)		Fair Value at			Valuation Technique		Significant	Range
		December 31, 2013					Unobservable
							Input
Industrial revenue bonds		$	3,859		Discounted cash flow		Discount rate	3.7%-3.9%
							Illiquidity factor	0.50%
Assets and Liabilities Measured on a Nonrecurring Basis
Assets and liabilities measured at fair value on a nonrecurring basis are summarized below as of September 30, 2014:
(Dollars in thousands)		Fair Value Measurement Using:
		Quoted Prices in			Significant			Significant
		Active Markets			Other			Unobservable
		for Identical			Observable			Inputs
		Assets			Inputs			(Level 3)
		(Level 1)			(Level 2)
Assets
Other real estate owned		$	—		$	—		$	77,856
Other repossessed assets		—			144			—
Other real estate owned measured at fair value as of September 30, 2014 had a carrying amount of $99.5 million, less valuation allowances totaling $21.6 million. Other repossessed assets are primarily comprised of repossessed vehicles and equipment and are measured at fair value as of the date of repossession.
Assets and liabilities measured at fair value on a nonrecurring basis are summarized below as of December 31, 2013:
(Dollars in thousands)		Fair Value Measurement Using:
		Quoted Prices in			Significant			Significant
		Active Markets			Other			Unobservable
		for Identical			Observable			Inputs
		Assets			Inputs			(Level 3)
		(Level 1)			(Level 2)
Assets
Other real estate owned		$	—		$	—		$	118,579
Other repossessed assets		—			108			—
Impaired loans		—			—			1,332
Other real estate owned measured at fair value as of December 31, 2013 had a carrying amount of $138.4 million, less valuation allowances totaling $19.8 million. Other repossessed assets are primarily comprised of repossessed vehicles and equipment and are measured at fair value as of the date of repossession.
Quantitative Information about Nonrecurring Level 3 Fair Value Measurements
(Dollars in thousands)		Fair Value at			Valuation Technique		Significant Unobservable Input	Range
		September 30, 2014
Other real estate owned		$	77,856		Fair value of property		Appraised value less cost to sell	6%-10%
(Dollars in thousands)		Fair Value at			Valuation Technique		Significant Unobservable Input	Range
		December 31, 2013
Other real estate owned		$	118,579		Fair value of property		Appraised value less cost to sell	7%-10%
Impaired loans		1,332			Fair value of collateral		Appraised value less cost to sell	8%
Carrying amount and estimated fair values of financial instruments were as follows:
(Dollars in thousands)		Fair Value Measurement
September 30, 2014		Carrying Value			Estimated			Level 1		Level 2			Level 3
					Fair Value
Financial Assets
Cash and cash equivalents		$	159,410		$	159,410		$	159,410	$	—		$	—
Trading securities		2,312			2,312			—		2,312			—
Investment securities available-for-sale		580,732			580,732			—		577,008			3,724
Investment securities held-to-maturity		454,809			457,712			—		457,712			—
Loans, net		4,771,437			4,917,215			—		6,439			4,910,776
FDIC indemnification asset		21,025			21,025			—		—			21,025
Receivable from FDIC		3,491			3,491			—		3,491			—
Other earning assets (1)		47,796			47,796			—		—			47,796
Gross asset value of derivatives		15			15			—		15			—
Total financial assets		$	6,041,027		$	6,189,708		$	159,410	$	1,046,977		$	4,983,321
Financial Liabilities
Non-contractual deposits		3,745,350			3,745,350			—		—			3,745,350
Contractual deposits		1,430,106			1,428,890			—		—			1,428,890
Federal Home Loan Bank advances		226,138			226,073			—		226,073			—
Short-term borrowings		23,823			23,823			—		23,823			—
Long-term borrowings		52,760			54,454			—		—			54,454
Subordinated debentures		86,636			98,156			—		—			98,156
Gross liability value of derivatives		21			21			—		21			—
Total financial liabilities		$	5,564,834		$	5,576,767		$	—	$	249,917		$	5,326,850
(Dollars in thousands)		Fair Value Measurement
December 31, 2013		Carrying Value			Estimated			Level 1		Level 2			Level 3
					Fair Value
Financial Assets
Cash and cash equivalents		$	164,441		$	164,441		$	164,441	$	—		$	—
Trading securities		6,348			6,348			4,477		1,871			—
Investment securities available-for-sale		685,441			685,441			—		681,582			3,859
Investment securities held-to-maturity		465,098			459,693			—		459,693			—
Loans, net		4,495,178			4,681,554			—		8,012			4,673,542
FDIC indemnification asset		33,610			33,610			—		—			33,610
Receivable from FDIC		7,624			7,624			—		7,624			—
Other earning assets (1)		44,088			44,088			—		—			44,088
Gross asset value of derivatives		15			15			—		15			—
Total financial assets		$	5,901,843		$	6,082,814		$	168,918	$	1,158,797		$	4,755,099
Financial Liabilities
Non-contractual deposits		$	3,737,566		$	3,737,566		$	—	$	—		$	3,737,566
Contractual deposits		1,447,497			1,448,032			—		—			1,448,032
Federal Home Loan Bank advances		96,278			96,241			—		96,241			—
Short-term borrowings		24,850			24,850			—		24,850			—
Long-term borrowings		53,449			55,861			—		—			55,861
Subordinated debentures		85,112			100,795			—		—			100,795
Gross liability value of derivatives		1,330			1,330			—		1,330			—
Total financial liabilities		$	5,446,082		$	5,464,675		$	—	$	122,421		$	5,342,254
(1) Includes Federal Reserve Bank, Federal Home Loan Bank and Bankers 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, receivable from FDIC, derivatives, noncontractual demand deposits and certain short-term borrowings. As it is not practicable to determine the fair value of Federal Reserve, Federal Home Loan Bank stock, FDIC indemnification asset and correspondent bank’s stocks 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 losses. Fair values for impaired loans are estimated using discounted cash flow analysis or underlying collateral values. 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.
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
For cash & cash equivalents, the carrying value is primarily utilized as a reasonable estimate of fair value.
Derivative financial instruments
Fair values for 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 also 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 September 30, 2014, Capital 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 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. We consider 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.
Sensitivity to Changes in Significant Unobservable Inputs
As discussed above, as of September 30, 2014, 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 are summarized below as of September 30, 2014:
(Dollars in thousands)					Fair Value Measurement Using:
		Total			Quoted Prices			Significant		Significant
					in Active			Other		Unobservable
					Markets for			Observable		Inputs
					Identical Assets			Inputs		(Level 3)
					(Level 1)			(Level 2)
Assets
Trading securities		$	2,312		$	—		$	2,312	$	—
Available-for-sale securities:
Mortgage-backed securities—residential		576,062			—			576,062		—
Industrial revenue bonds		3,724			—			—		3,724
Marketable equity securities		946			—			946		—
Available-for-sale securities		$	580,732		$	—		$	577,008	$	3,724
Gross asset value of derivatives		$	15		$	—		$	15	$	—
Liabilities
Gross liability value of derivatives		$	21		$	—		$	21	$	—
There were no transfers of assets and liabilities between levels of the fair value hierarchy during the three and nine months ended September 30, 2014.
Assets and liabilities measured at fair value on a recurring basis are summarized below as of December 31, 2013:
(Dollars in thousands)					Fair Value Measurement Using:
		Total			Quoted Prices			Significant				Significant
					in Active			Other				Unobservable
					Markets for			Observable				Inputs
					Identical Assets			Inputs				(Level 3)
					(Level 1)			(Level 2)
Assets
Trading securities		$	6,348		$	4,477		$	1,871	(1	)	$	—
Available-for-sale securities:
Asset-backed securities		133,225			—			133,225				—
Mortgage-backed securities-residential		546,626			—			546,626				—
Industrial revenue bonds		3,859			—			—				3,859
Marketable equity securities		931			—			931		(1	)	—
Collateralized debt obligations		800			—			800				—
Available-for-sale securities		$	685,441		$	—		$	681,582			$	3,859
Gross asset value of derivatives		$	15		$	—		$	15			$	—
Liabilities
Gross liability value of derivatives		$	1,330		$	—		$	1,330			$	—
-1	Transferred from Level 1 to Level 2 due to limited observable market data.
The tables below present 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 and nine months ended and held at September 30, 2014:
(Dollars in thousands)	Fair Value Measurement Using
	Significant Unobservable
	Inputs (Level 3)
	Industrial
	Revenue Bonds
Beginning balance, June 30, 2014	$	3,736
Included in other comprehensive income	(12		)
Ending balance, September 30, 2014	$	3,724
(Dollars in thousands)	Fair Value Measurement Using
	Significant Unobservable
	Inputs (Level 3)
	Industrial
	Revenue Bonds
Beginning balance, January 1, 2014	$	3,859
Principal reduction	(170		)
Included in other comprehensive income	35
Ending balance, September 30, 2014	$	3,724
The tables below present 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 and nine months ended and held at September 30, 2013:
(Dollars in thousands)		Fair Value Measurement Using Significant
		Unobservable Inputs (Level 3)
		Corporate Bonds			Industrial			Collateralized
					Revenue			Debt
					Bonds			Obligations
Beginning balance, June 30, 2013		$	—		$	3,872		$	301
Included in other comprehensive income		—			93			28
Ending balance, September 30, 2013		$	—		$	3,965		$	329
(Dollars in thousands)		Fair Value Measurement Using Significant
		Unobservable Inputs (Level 3)
		Corporate Bonds			Industrial			Collateralized
					Revenue			Debt
					Bonds			Obligations
Beginning balance, January 1, 2013		$	26		$	3,800		$	297
Included in earnings-gain on sales		199			—			—
Included in other comprehensive income		—			165			32
Sales		(225		)	—			—
Ending balance, September 30, 2013		$	—		$	3,965		$	329
Quantitative Information about Recurring Level 3 Fair Value Measurements
(Dollars in thousands)		Fair Value at			Valuation Technique		Significant	Range
		September 30, 2014					Unobservable
							Input
Industrial revenue bonds		$	3,724		Discounted cash flow		Discount rate	3.20%
							Illiquidity factor	0.50%
(Dollars in thousands)		Fair Value at			Valuation Technique		Significant	Range
		December 31, 2013					Unobservable
							Input
Industrial revenue bonds		$	3,859		Discounted cash flow		Discount rate	3.7%-3.9%
							Illiquidity factor	0.50%
Assets and Liabilities Measured on a Nonrecurring Basis
Assets and liabilities measured at fair value on a nonrecurring basis are summarized below as of September 30, 2014:
(Dollars in thousands)		Fair Value Measurement Using:
		Quoted Prices in			Significant			Significant
		Active Markets			Other			Unobservable
		for Identical			Observable			Inputs
		Assets			Inputs			(Level 3)
		(Level 1)			(Level 2)
Assets
Other real estate owned		$	—		$	—		$	77,856
Other repossessed assets		—			144			—
Other real estate owned measured at fair value as of September 30, 2014 had a carrying amount of $99.5 million, less valuation allowances totaling $21.6 million. Other repossessed assets are primarily comprised of repossessed vehicles and equipment and are measured at fair value as of the date of repossession.
Assets and liabilities measured at fair value on a nonrecurring basis are summarized below as of December 31, 2013:
(Dollars in thousands)		Fair Value Measurement Using:
		Quoted Prices in			Significant			Significant
		Active Markets			Other			Unobservable
		for Identical			Observable			Inputs
		Assets			Inputs			(Level 3)
		(Level 1)			(Level 2)
Assets
Other real estate owned		$	—		$	—		$	118,579
Other repossessed assets		—			108			—
Impaired loans		—			—			1,332
Other real estate owned measured at fair value as of December 31, 2013 had a carrying amount of $138.4 million, less valuation allowances totaling $19.8 million. Other repossessed assets are primarily comprised of repossessed vehicles and equipment and are measured at fair value as of the date of repossession.
Quantitative Information about Nonrecurring Level 3 Fair Value Measurements
(Dollars in thousands)		Fair Value at			Valuation Technique		Significant Unobservable Input	Range
		September 30, 2014
Other real estate owned		$	77,856		Fair value of property		Appraised value less cost to sell	6%-10%
(Dollars in thousands)		Fair Value at			Valuation Technique		Significant Unobservable Input	Range
		December 31, 2013
Other real estate owned		$	118,579		Fair value of property		Appraised value less cost to sell	7%-10%
Impaired loans		1,332			Fair value of collateral		Appraised value less cost to sell	8%
Carrying amount and estimated fair values of financial instruments were as follows:
(Dollars in thousands)		Fair Value Measurement
September 30, 2014		Carrying Value			Estimated			Level 1		Level 2			Level 3
					Fair Value
Financial Assets
Cash and cash equivalents		$	159,410		$	159,410		$	159,410	$	—		$	—
Trading securities		2,312			2,312			—		2,312			—
Investment securities available-for-sale		580,732			580,732			—		577,008			3,724
Investment securities held-to-maturity		454,809			457,712			—		457,712			—
Loans, net		4,771,437			4,917,215			—		6,439			4,910,776
FDIC indemnification asset		21,025			21,025			—		—			21,025
Receivable from FDIC		3,491			3,491			—		3,491			—
Other earning assets (1)		47,796			47,796			—		—			47,796
Gross asset value of derivatives		15			15			—		15			—
Total financial assets		$	6,041,027		$	6,189,708		$	159,410	$	1,046,977		$	4,983,321
Financial Liabilities
Non-contractual deposits		3,745,350			3,745,350			—		—			3,745,350
Contractual deposits		1,430,106			1,428,890			—		—			1,428,890
Federal Home Loan Bank advances		226,138			226,073			—		226,073			—
Short-term borrowings		23,823			23,823			—		23,823			—
Long-term borrowings		52,760			54,454			—		—			54,454
Subordinated debentures		86,636			98,156			—		—			98,156
Gross liability value of derivatives		21			21			—		21			—
Total financial liabilities		$	5,564,834		$	5,576,767		$	—	$	249,917		$	5,326,850
(Dollars in thousands)		Fair Value Measurement
December 31, 2013		Carrying Value			Estimated			Level 1		Level 2			Level 3
					Fair Value
Financial Assets
Cash and cash equivalents		$	164,441		$	164,441		$	164,441	$	—		$	—
Trading securities		6,348			6,348			4,477		1,871			—
Investment securities available-for-sale		685,441			685,441			—		681,582			3,859
Investment securities held-to-maturity		465,098			459,693			—		459,693			—
Loans, net		4,495,178			4,681,554			—		8,012			4,673,542
FDIC indemnification asset		33,610			33,610			—		—			33,610
Receivable from FDIC		7,624			7,624			—		7,624			—
Other earning assets (1)		44,088			44,088			—		—			44,088
Gross asset value of derivatives		15			15			—		15			—
Total financial assets		$	5,901,843		$	6,082,814		$	168,918	$	1,158,797		$	4,755,099
Financial Liabilities
Non-contractual deposits		$	3,737,566		$	3,737,566		$	—	$	—		$	3,737,566
Contractual deposits		1,447,497			1,448,032			—		—			1,448,032
Federal Home Loan Bank advances		96,278			96,241			—		96,241			—
Short-term borrowings		24,850			24,850			—		24,850			—
Long-term borrowings		53,449			55,861			—		—			55,861
Subordinated debentures		85,112			100,795			—		—			100,795
Gross liability value of derivatives		1,330			1,330			—		1,330			—
Total financial liabilities		$	5,446,082		$	5,464,675		$	—	$	122,421		$	5,342,254
(1) Includes Federal Reserve Bank, Federal Home Loan Bank and Bankers 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, receivable from FDIC, derivatives, noncontractual demand deposits and certain short-term borrowings. As it is not practicable to determine the fair value of Federal Reserve, Federal Home Loan Bank stock, FDIC indemnification asset and correspondent bank’s stocks 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 losses. Fair values for impaired loans are estimated using discounted cash flow analysis or underlying collateral values. 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_Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments	'
	Derivative Instruments
	The Company has derivative financial instruments acquired in its purchase of SCMF, primarily in the form of interest rate swaps. The forward loan sales contracts are derived from loans held for sale or in the Company’s pipeline. These transactions involve both credit and market risk.
	The Company’s derivative instrument contracts which are recorded in other assets and other liabilities on the Company’s balance sheets consist of the following:
	(Dollars in thousands)	30-Sep-14				December 31, 2013
		Fair Value		Notional		Fair Value		Notional
				Amount				Amount
	Assets
	Interest rate cap contracts (matured in 2014)	$	—	$	—	$	—	$	12,500
	Forward loan sales contracts (maturing in 2014)	15		6,054		15		4,215
	Total assets	$	15	$	6,054	$	15	$	16,715
	Liabilities
	Interest rate swaps associated with certificates of deposits (maturing in 2040)	$	—	$	—	$	1,320	$	25,000
	Forward loan sales contracts (maturing in 2014)	21		8,096		10		3,545
	Total liabilities	$	21	$	8,096	$	1,330	$	28,545
	The Company does not enter into derivative financial instruments for speculative purposes. None of the derivatives held are designated as hedging instruments or otherwise qualify for hedge accounting treatment and all changes in fair value are recognized in non-interest income or non-interest expense during the period of change.
	For the three and nine months ended September 30, 2014, the Company recorded $29 thousand and $1.8 million, respectively, in non-interest income, and $14 thousand and $49 thousand, respectively, in non-interest expense as a result of changes in fair value of derivatives. The interest rate swaps associated with certificates of deposit were terminated in September 2014, and, as a result, the Company recognized a $0.3 million loss in non-interest expense.
	For the three and nine months ended September 30, 2013, the company recorded $(0.3) million and $(0.7) million in non-interest income, respectively, and $0.2 million and $0.4 million in non-interest expense, respectively, as a result of changes in fair value of derivatives.
	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. These collateral levels are based on the credit rating of the counterparties.
	The primary objective for each of these contracts is to minimize risk. Interest rate risk being the primary risk for the interest rate swaps and forward loan sales contracts.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Principles of Consolidation and Nature of Operations	'
	Principles of Consolidation and Nature of Operations
	Capital Bank Financial Corp. (“CBF” or the “Company”; formerly known as North American Financial Holdings, Inc.) is a bank holding company incorporated in Delaware and headquartered in Florida whose business is conducted primarily through Capital Bank, National Association (“Capital Bank, NA” or the “Bank”). CBF has a total of 162 full service banking offices located in Florida, North and South Carolina, Tennessee and Virginia.
	The accompanying consolidated financial statements (unaudited) 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, 2013.
Out of Period Adjustments	'
	Out of Period Adjustments
	During the three months ended March 31, 2014, the Company recorded a correction of an error resulting from the state net operating loss that the Company was not entitled to subsequent to the 2011 Green Bankshares acquisition. The impact of this correction decreased deferred tax assets and increased goodwill by $2.5 million. After evaluating the quantitative and qualitative aspects of this error, the Company concluded that its prior period financial statements were not materially misstated.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In August 2014, the Financial Accounting Standard Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2014-15, "Presentation of Financial Statements-Going Concern (Subtopic 205-40)—Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern". The amendments in this update provide guidance in U.S. GAAP about management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. The amendments in this update apply to all entities and will be effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In August 2014, the FASB issued ASU 2014-14, "Receivables—Troubled Debt Restructuring by Creditors (Subtopic 310-40)—Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure". The amendment in this update requires that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if certain conditions are met. Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The amendments in this update affect creditors that hold government-guaranteed mortgage loans, including those guaranteed by the Federal Housing Administration ("FHA") of the U.S. Department of Housing and Urban Development ("HUD"), and the U.S. Department of Veterans Affairs ("VA"). This ASU will be effective for the annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In June 2014, the FASB issued ASU No. 2014-12, “Compensation- Stock Compensation (Topic 718)—Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could be Achieved after the Requisite Service Period”. This update provides specific guidance on whether to treat a performance target that could be achieved after the requisite service period as a performance condition that affects vesting or as a nonvesting condition that affects the grant-date fair value of an award. This ASU is effective for fiscal years and interim periods beginning after December 15, 2015. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In June 2014, the FASB issued ASU No. 2014-11, “Transfers and Servicing (topic 860)—Repurchase-to-Maturity Transactions, Repurchase Financing, and Disclosures”. This update changes the accounting for repurchase-to-maturity transactions and linked repurchase financings to secured borrowing accounting, which is consistent with the accounting for other repurchase agreements. The amendments also require two new disclosures. The first disclosure requires an entity to disclose information on transfers accounted for as sales in transactions that are economically similar to repurchase agreements. The second disclosure provides increased transparency about the types of collateral pledged in repurchase agreements and similar transactions accounted for as secured borrowings. The accounting changes in this update are effective for the first interim or annual period beginning after December 15, 2014. The disclosure for certain transactions accounted for as a sale is required to be presented for interim and annual periods beginning after December 15, 2014, and the disclosure for repurchase agreements, securities lending transactions, and repurchase-to-maturity transactions accounted for as secured borrowings is required to be presented for annual periods beginning after December 15, 2014, and interim periods beginning after December 15, 2015. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In May 2014, the FASB issued ASU No. 2014-9, “Revenue from Contracts with Customers (Topic 606)”. This update clarifies the principles for recognizing revenue from contracts with customers. This ASU, which does not apply to financial instruments, is effective for interim and annual reporting periods beginning after December 15, 2016. The Company is currently evaluating this ASU to determine the impact on its consolidated financial position, results of operations and cash flows.
	In January 2014, the FASB issued ASU 2014-4, “Receivables—Troubled Debt Restructuring by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).” This update clarifies that when an in-substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1)the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2)the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed-in-lieu of foreclosure or through a similar legal agreement. This ASU is effective for fiscal years and interim periods beginning after December 15, 2014. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.
	In January 2014, the FASB issued ASU 2014-1, “Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects (a consensus of the FASB Emerging Issues Task Force).” This ASU allows for use of the proportional amortization method for qualified affordable housing projects if certain conditions are met. Under the proportional amortization method, the initial cost of the investment is amortized in proportion to the tax credits and other tax benefits received and the net investment performance is recognized in the income statement as a component of income tax expense. This ASU provides for a practical expedient, which allows for amortization of only expected tax credits over the period tax credits are expected to be received. This method is permitted if it produces a measurement that is substantially similar to the measurement that would result from using both tax credits and other tax benefits. This ASU is effective for fiscal years and interim periods beginning after December 15, 2014. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows.

Earnings_Per_Common_Share_Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2014
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		Nine Months Ended
		30-Sep-14	30-Sep-13	30-Sep-14	30-Sep-13
	Weighted average number of shares outstanding:
	Basic	47,912	51,804	49,164	53,170
	Dilutive effect of options outstanding	498	31	490	—
	Dilutive effect of unvested restricted shares	659	920	752	862
	Diluted	49,069	52,755	50,406	54,032
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		Nine Months Ended
		30-Sep-14	30-Sep-13	30-Sep-14	30-Sep-13
	Anti-dilutive stock options	12	269	12	3,133
	Anti-dilutive unvested restricted shares	—	—	—	—

Investment_Securities_Tables

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2014
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 September 30, 2014 and December 31, 2013, are presented below:
	(Dollars in thousands)	30-Sep-14
		Amortized		Unrealized		Unrealized		Estimated
		Cost		Gains		Losses		Fair Value
	Available-for-Sale
	Marketable equity securities	$	946	$	—	$	—	$	946
	Mortgage-backed securities—residential issued by government sponsored entities	578,097		1,136		3,171		576,062
	Industrial revenue bonds	3,580		144		—		3,724
	Total	$	582,623	$	1,280	$	3,171	$	580,732
	Held-to-Maturity
	U.S. Government agencies	$	14,288	$	—	$	32	$	14,256
	Corporate bonds	25,000		163		—		25,163
	State and political subdivisions—tax exempt	12,970		475		—		13,445
	State and political subdivisions—taxable	539		21		—		560
	Mortgage-backed securities—residential issued by government sponsored entities	402,012		2,638		362		404,288
	Total	$	454,809	$	3,297	$	394	$	457,712
	(Dollars in thousands)	December 31, 2013
		Amortized		Unrealized		Unrealized		Estimated
		Cost		Gains		Losses		Fair Value
	Available-for-Sale
	Asset-backed securities	$	133,647	$	363	$	785	$	133,225
	Marketable equity securities	946		—		15		931
	Mortgage-backed securities—residential issued by government sponsored entities	549,869		2,337		5,580		546,626
	Industrial revenue bonds	3,750		109		—		3,859
	Collateralized debt obligations	505		295		—		800
	Total	$	688,717	$	3,104	$	6,380	$	685,441
	Held-to-Maturity
	U.S. Government agencies	$	14,972	$	—	$	401	$	14,571
	State and political subdivisions—tax exempt	14,201		27		129		14,099
	State and political subdivisions—taxable	545		—		12		533
	Mortgage-backed securities—residential issued by government sponsored entities	435,380		328		5,218		430,490
	Total	$	465,098	$	355	$	5,760	$	459,693
Estimated Fair Value of Investment Securities Available for Sale and Held to Maturity by Contractual Maturity	'
	The estimated fair value of investment securities at September 30, 2014 , 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 repay obligations without call or prepayment penalties. Debt securities not due at a single maturity date are shown separately.
	(Dollars in thousands)	30-Sep-14
		Amortized		Estimated		Yield
		Cost		Fair Value
	Available-for-sale
	Due in one year or less	$	—	$	—	—	%
	Due after one year through five years	—		—		—	%
	Due after five years through ten years	3,580		3,724		2.23	%
	Due after ten years	—		—		—	%
	Mortgage-backed securities—residential issued by government sponsored entities	578,097		576,062		1.78	%
	Subtotal	581,677		579,786		1.78	%
	Marketable equity securities	946		946
	Total	$	582,623	$	580,732
		Amortized		Estimated		Yield
		Cost		Fair Value
	Held-to-maturity
	Due in one year or less	$	203	$	204	0.76	%
	Due after one year through five years	10,818		10,882		4.65	%
	Due after five years through ten years	24,882		25,354		4.52	%
	Due after ten years	16,894		16,984		2.97	%
	Mortgage-backed securities—residential issued by government sponsored entities	402,012		404,288		2.36	%
	Total	$	454,809	$	457,712	2.56	%
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
		Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
		Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
	30-Sep-14
	Available-for-Sale
	Mortgage-backed securities—residential issued by government sponsored entities	$	329,422	$	2,621	$	44,276	$	550	$	373,698	$	3,171
	Total	$	329,422	$	2,621	$	44,276	$	550	$	373,698	$	3,171
	Held-to-Maturity
	U.S. Government agencies	$	14,256	$	32	$	—	$	—	$	14,256	$	32
	Mortgage-backed securities—residential issued by government sponsored entities	48,313		362		—		—		48,313		362
	Total	$	62,569	$	394	$	—	$	—	$	62,569	$	394
	(Dollars in thousands)	Less than 12 Months				12 Months or Longer				Total
		Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
		Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
	December 31, 2013
	Available-for-Sale
	Asset-backed securities	$	102,835	$	785	$	—	$	—	$	102,835	$	785
	Marketable equity securities	931		15		—		—		931		15
	Mortgage-backed securities—residential issued by government sponsored entities	339,565		5,580		—		—		339,565		5,580
	Total	$	443,331	$	6,380	$	—	$	—	$	443,331	$	6,380
	Held-to-Maturity
	U.S. Government agencies	$	14,571	$	401	$	—	$	—	$	14,571	$	401
	State and political subdivisions—tax exempt	10,489		129		—		—		10,489		129
	State and political subdivisions—taxable	533		12		—		—		533		12
	Mortgage-backed securities—residential issued by government sponsored entities	342,333		5,218		—		—		342,333		5,218
	Total	$	367,926	$	5,760	$	—	$	—	$	367,926	$	5,760

Loans_Tables

Loans (Tables)	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
Major Classifications of Loans	'
	Major classifications of loans, including loans held for sale, are as follows:
	(Dollars in thousands)		30-Sep-14				31-Dec-13
	Non-owner occupied commercial real estate		$	797,197			$	775,733
	Other commercial construction and land		243,563				300,494
	Multifamily commercial real estate		71,119				67,688
	1-4 family residential construction and land		76,442				71,351
	Total commercial real estate		1,188,321				1,215,266
	Owner occupied commercial real estate		1,026,853				1,058,148
	Commercial and industrial loans		959,641				803,736
	Lease financing		2,175				2,676
	Total commercial		1,988,669				1,864,560
	1-4 family residential		913,219				804,322
	Home equity loans		373,604				386,366
	Other consumer loans		242,451				170,526
	Total consumer		1,529,274				1,361,214
	Other		117,507				110,989
	Total loans		$	4,823,771			$	4,552,029
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 non-accretable 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								Nine Months Ended
			30-Sep-14				30-Sep-13				30-Sep-14				30-Sep-13
	Accretable Yield
	Balance at beginning of period		$	329,421			$	444,481			$	383,775			$	553,348
	Accretion of income		(28,560		)		(39,625		)		(92,743		)		(126,634		)
	Reclassification from nonaccretable difference		12,720				15,018				48,616				46,117
	Other		(6,394		)		(21,459		)		(32,461		)		(74,416		)
	Balance at end of period		$	307,187			$	398,415			$	307,187			$	398,415
	Nonaccretable difference, balance at the end of the period		$	210,101			$	316,047			$	210,101			$	316,047
Summary of Company's Estimate of Cash Flows for Purchased Credit-Impaired Loans	'
	The following table represents the periods we estimate the remaining accretable yield will accrete into income based on the Company’s most recent estimates of cash flows for PCI loans:
	(Dollars in thousands)
	Periods ending December 31,
	2014		$	26,482
	2015		86,888
	2016		62,361
	2017		42,443
	2018		28,143
	Thereafter		60,870
	Total		$	307,187
Major Categories of Loans	'
	The following is a summary of the major categories of non-covered loans outstanding as of September 30, 2014 and December 31, 2013:
	(Dollars in thousands)		Non-PCI Loans
	September 30, 2014		New				Acquired				PCI Loans				Total
															Non-covered
															Loans
	Non-owner occupied commercial real estate		$	327,458			$	61,027			$	369,945			$	758,430
	Other commercial construction and land		88,013				266				141,762				230,041
	Multifamily commercial real estate		27,439				13,863				25,109				66,411
	1-4 family residential construction and land		65,428				—				11,014				76,442
	Total commercial real estate		508,338				75,156				547,830				1,131,324
	Owner occupied commercial real estate		700,945				40,683				228,602				970,230
	Commercial and industrial loans		836,036				13,362				102,429				951,827
	Lease financing		2,175				—				—				2,175
	Total commercial		1,539,156				54,045				331,031				1,924,232
	1-4 family residential		523,598				45,826				286,913				856,337
	Home equity loans		87,047				159,270				85,689				332,006
	Other consumer loans		230,889				4,944				6,543				242,376
	Total consumer		841,534				210,040				379,145				1,430,719
	Other		70,180				3,664				42,815				116,659
	Total loans		$	2,959,208			$	342,905			$	1,300,821			$	4,602,934
	(Dollars in thousands)		Non-PCI Loans
	December 31, 2013		New				Acquired				PCI Loans				Total
															Non-covered
															Loans
	Non-owner occupied commercial real estate		$	219,482			$	68,080			$	432,437			$	719,999
	Other commercial construction and land		67,537				252				213,543				281,332
	Multifamily commercial real estate		12,537				16,650				29,392				58,579
	1-4 family residential construction and land		56,978				1				14,372				71,351
	Total commercial real estate		356,534				84,983				689,744				1,131,261
	Owner occupied commercial real estate		642,794				48,459				299,593				990,846
	Commercial and industrial loans		643,044				20,519				129,961				793,524
	Lease financing		2,676				—				—				2,676
	Total commercial		1,288,514				68,978				429,554				1,787,046
	1-4 family residential		332,585				52,078				349,060				733,723
	Home equity loans		52,918				181,138				100,995				335,051
	Other consumer loans		151,584				6,407				12,433				170,424
	Total consumer		537,087				239,623				462,488				1,239,198
	Other		57,320				3,959				47,888				109,167
	Total loans		$	2,239,455			$	397,543			$	1,629,674			$	4,266,672
	Covered Loans
	The following is a summary of the major categories of covered loans outstanding as of September 30, 2014, and December 31, 2013:
	(Dollars in thousands)		Non-PCI Loans
	September 30, 2014		New				Acquired				PCI Loans				Total
															Covered
															Loans
	Non-owner occupied commercial real estate		$	—			$	—			$	38,767			$	38,767
	Other commercial construction and land		—				—				13,522				13,522
	Multifamily commercial real estate		—				—				4,708				4,708
	1-4 family residential construction and land		—				—				—				—
	Total commercial real estate		—				—				56,997				56,997
	Owner occupied commercial real estate		—				—				56,623				56,623
	Commercial and industrial loans		—				193				7,621				7,814
	Lease financing		—				—				—				—
	Total commercial		—				193				64,244				64,437
	1-4 family residential		—				1,330				55,552				56,882
	Home equity loans		—				31,786				9,812				41,598
	Other consumer loans		—				—				75				75
	Total consumer		—				33,116				65,439				98,555
	Other		—				—				848				848
	Total loans		$	—			$	33,309			$	187,528			$	220,837
	(Dollars in thousands)		Non-PCI Loans
	December 31, 2013		New				Acquired				PCI Loans				Total Covered
															Loans
Non-owner occupied commercial real estate		$	—			$	—			$	55,734			$	55,734
Other commercial construction and land		—				—				19,162				19,162
Multifamily commercial real estate		—				—				9,109				9,109
1-4 family residential construction and land		—				—				—				—
Total commercial real estate		—				—				84,005				84,005
Owner occupied commercial real estate		—				—				67,302				67,302
Commercial and industrial loans		—				356				9,856				10,212
Lease financing		—				—				—				—
Total commercial		—				356				77,158				77,514
1-4 family residential		—				1,017				69,582				70,599
Home equity loans		—				36,114				15,201				51,315
Other consumer loans		—				—				102				102
Total consumer		—				37,131				84,885				122,016
Other		—				—				1,822				1,822
Total loans		$	—			$	37,487			$	247,870			$	285,357
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 September 30, 2014:
	(Dollars in thousands)	30-89 Days Past Due								Greater than 90 Days Past Due								Non-accrual
										and Still Accruing/Accreting
	Non-purchased credit impaired loans	Non-Covered				Covered				Non-Covered				Covered				Non-Covered		Covered		Total
	Non-owner occupied commercial real estate	$	—			$	—			$	—			$	—			$	517	$	—	$	517
	Other commercial construction and land	23				—				—				—				255		—		278
	Multifamily commercial real estate	—				—				—				—				—		—		—
	1-4 family residential construction and land	—				—				—				—				168		—		168
	Total commercial real estate	23				—				—				—				940		—		963
	Owner occupied commercial real estate	1,373				—				—				—				2,605		—		3,978
	Commercial and industrial loans	106				—				—				—				3,154		66		3,326
	Lease financing	—				—				—				—				—		—		—
	Total commercial	1,479				—				—				—				5,759		66		7,304
	1-4 family residential	190				45				—				—				527		27		789
	Home equity loans	615				241				—				—				1,691		830		3,377
	Other consumer loans	2,579				—				—				—				740		—		3,319
	Total consumer	3,384				286				—				—				2,958		857		7,485
	Other	—				—				—				—				10		—		10
	Total loans	$	4,886			$	286			$	—			$	—			$	9,667	$	923	$	15,762
	(Dollars in thousands)	30-89 Days Past Due								Greater than 90 Days Past Due								Non-accrual
										and Still Accruing/Accreting
	Purchased credit impaired loans	Non-Covered				Covered				Non-Covered				Covered				Non-Covered		Covered		Total
	Non-owner occupied commercial real estate	$	699			$	262			$	26,491			$	4,122			$	—	$	—	$	31,574
	Other commercial construction and land	190				15				30,857				6,983				—		—		38,045
	Multifamily commercial real estate	—				—				2,098				—				—		—		2,098
	1-4 family residential construction and land	—				—				1,212				—				—		—		1,212
	Total commercial real estate	889				277				60,658				11,105				—		—		72,929
	Owner occupied commercial real estate	1,138				214				17,607				3,038				—		—		21,997
	Commercial and industrial loans	750				239				24,608				128				—		—		25,725
	Lease financing	—				—				—				—				—		—		—
	Total commercial	1,888				453				42,215				3,166				—		—		47,722
	1-4 family residential	3,444				220				27,803				7,691				—		—		39,158
	Home equity loans	1,162				75				4,740				1,396				—		—		7,373
	Other consumer loans	202				—				176				27				—		—		405
	Total consumer	4,808				295				32,719				9,114				—		—		46,936
	Other	81				—				2,693				—				—		—		2,774
	Total loans	$	7,666			$	1,025			$	138,285			$	23,385			$	—	$	—	$	170,361
	The following tables present the aging of the recorded investment in past due loans, based on contractual terms, as of December 31, 2013:
	(Dollars in thousands)	30-89 Days Past Due								Greater than 90 Days Past Due								Non-accrual
										and Still Accruing/Accreting
	Non-purchased credit impaired loans	Non-Covered				Covered				Non-Covered				Covered				Non-Covered		Covered		Total
	Non-owner occupied commercial real estate	$	—			$	—			$	—			$	—			$	90	$	—	$	90
	Other commercial construction and land	—				—				—				—				563		—		563
	Multifamily commercial real estate	305				—				—				—				—		—		305
	1-4 family residential construction and land	—				—				—				—				1		—		1
	Total commercial real estate	305				—				—				—				654		—		959
	Owner occupied commercial real estate	20				—				—				—				3,394		—		3,414
	Commercial and industrial loans	2				—				—				—				1,879		66		1,947
	Lease financing	—				—				—				—				—		—		—
	Total commercial	22				—				—				—				5,273		66		5,361
	1-4 family residential	862				—				—				—				1,417		—		2,279
	Home equity loans	1,046				146				—				—				2,324		1,270		4,786
	Other consumer loans	1,800				—				—				—				806		—		2,606
	Total consumer	3,708				146				—				—				4,547		1,270		9,671
	Total loans	$	4,035			$	146			$	—			$	—			$	10,474	$	1,336	$	15,991
	(Dollars in thousands)	30-89 Days Past Due								Greater than 90 Days Past Due								Non-accrual
										and Still Accruing/Accreting
	Purchased credit impaired loans	Non-Covered				Covered				Non-Covered				Covered				Non-Covered		Covered		Total
	Non-owner occupied commercial real estate	$	1,463			$	107			$	35,563			$	10,658			$	—	$	—	$	47,791
	Other commercial construction and land	1,105				—				58,633				8,479				—		—		68,217
	Multifamily commercial real estate	—				—				2,641				—				—		—		2,641
	1-4 family residential construction and land	5				—				1,796				—				—		—		1,801
	Total commercial real estate	2,573				107				98,633				19,137				—		—		120,450
Owner occupied commercial real estate	4,626				260				33,974				6,631				—		—		45,491
Commercial and industrial loans	249				—				29,819				1,597				—		—		31,665
Lease financing	—				—				—				—				—		—		—
Total commercial	4,875				260				63,793				8,228				—		—		77,156
1-4 family residential	6,696				227				37,646				10,824				—		—		55,393
Home equity loans	1,733				59				7,313				1,227				—		—		10,332
Other consumer loans	344				—				1,249				67				—		—		1,660
Total consumer	8,773				286				46,208				12,118				—		—		67,385
Other	433				—				4,745				954				—		—		6,132
Total loans	$	16,654			$	653			$	213,379			$	40,437			$	—	$	—	$	271,123
Loans, Excluding Purchased Credit-Impaired Loans by Internal Ratings	'
	The following table summarizes loans, excluding PCI loans by internal rating at September 30, 2014:
										Substandard
	(Dollars in thousands)	Pass				Special Mention				Accruing/				Non-accrual				Doubtful		Total
										Accreting
	Non-owner occupied commercial real estate	$	386,116			$	963			$	889			$	517			$	—	$	388,485
	Other commercial construction and land	87,412				612				—				255				—		88,279
	Multifamily commercial real estate	41,302				—				—				—				—		41,302
	1-4 family residential construction and land	62,988				78				2,194				168				—		65,428
	Total commercial real estate	577,818				1,653				3,083				940				—		583,494
	Owner occupied commercial real estate	726,576				4,671				7,777				2,604				—		741,628
	Commercial and industrial loans	841,717				234				4,419				3,221				—		849,591
	Lease financing	2,175				—				—				—				—		2,175
	Total commercial	1,570,468				4,905				12,196				5,825				—		1,593,394
	1-4 family residential	569,955				151				94				554				—		570,754
	Home equity loans	273,315				—				2,267				2,521				—		278,103
	Other consumer loans	235,093				—				—				740				—		235,833
	Total consumer	1,078,363				151				2,361				3,815				—		1,084,690
	Other	73,584				—				250				10				—		73,844
	Total loans	$	3,300,233			$	6,709			$	17,890			$	10,590			$	—	$	3,335,422
	The following table summarizes loans, excluding PCI loans by internal rating at December 31, 2013:
										Substandard
	(Dollars in thousands)	Pass				Special Mention				Accruing/				Non-accrual				Doubtful		Total
										Accreting
	Non-owner occupied commercial real estate	$	285,919			$	568			$	985			$	90			$	—	$	287,562
	Other commercial construction and land	67,178				48				—				563				—		67,789
	Multifamily commercial real estate	28,882				—				305				—				—		29,187
	1-4 family residential construction and land	53,224				1,958				1,796				1				—		56,979
	Total commercial real estate	435,203				2,574				3,086				654				—		441,517
	Owner occupied commercial real estate	681,571				4,093				2,195				3,394				—		691,253
	Commercial and industrial loans	651,585				1,183				9,206				1,945				—		663,919
	Lease financing	2,676				—				—				—				—		2,676
	Total commercial	1,335,832				5,276				11,401				5,339				—		1,357,848
	1-4 family residential	384,235				28				—				1,417				—		385,680
	Home equity loans	263,490				37				3,050				3,593				—		270,170
	Other consumer loans	157,157				—				28				806				—		157,991
	Total consumer	804,882				65				3,078				5,816				—		813,841
	Other	61,006				—				273				—				—		61,279
	Total loans	$	2,636,923			$	7,915			$	17,838			$	11,809			$	—	$	2,674,485

Allowance_for_Loan_Losses_Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
Allowance for Loan Losses	'
	Activity in the allowance for loan losses for the three and nine months ended September 30, 2014 and 2013 is as follows:
	(Dollars in thousands)		Three Months Ended								Nine Months Ended
			30-Sep-14				30-Sep-13				30-Sep-14				30-Sep-13
	Balance, beginning of period		$	55,307			$	56,832			$	56,851			$	57,262
	Reversal of provision for loan losses for PCI loans		(4,205		)		(72		)		(7,633		)		(703		)
	Provision for loan losses for non-PCI loans		2,873				1,056				7,681				11,556
	Non-PCI loans charged-off		(2,306		)		(1,945		)		(6,438		)		(15,335		)
	Recoveries of non-PCI loans previously charged-off		665				522				1,873				3,613
	Balance, end of period		$	52,334			$	56,393			$	52,334			$	56,393
Roll Forward of the Allowance for Loan Losses	'
	The following tables present the roll forward of the allowance for loan losses for the three and nine months ended September 30, 2014 by the class of loans against which the allowance is allocated:
	(Dollars in thousands)		June 30, 2014				Provision/				Net (Charge-offs)/				30-Sep-14
							(Reversals)				Recoveries
	Non-owner occupied commercial real estate		$	4,487			$	(1,772	)		$	119			$	2,834
	Other commercial construction and land		11,502				1,401				11				12,914
	Multifamily commercial real estate		480				(17		)		—				463
	1-4 family residential construction and land		1,631				(386		)		(2		)		1,243
	Total commercial real estate		18,100				(774		)		128				17,454
	Owner occupied commercial real estate		3,317				(430		)		(10		)		2,877
	Commercial and industrial loans		8,645				(113		)		(177		)		8,355
	Lease financing		1				—				—				1
	Total commercial		11,963				(543		)		(187		)		11,233
	1-4 family residential		17,138				(1,250		)		(8		)		15,880
	Home equity loans		4,290				(371		)		(299		)		3,620
	Other consumer loans		3,431				1,244				(851		)		3,824
	Total consumer		24,859				(377		)		(1,158		)		23,324
	Other		385				362				(424		)		323
	Total loans		$	55,307			$	(1,332	)		$	(1,641	)		$	52,334
	(Dollars in thousands)		December 31, 2013				Provision/				Net(Charge-offs)/				30-Sep-14
							(Reversals)				Recoveries
	Non-owner occupied commercial real estate		$	4,635			$	(1,806	)		$	5			$	2,834
	Other commercial construction and land		8,217				4,881				(184		)		12,914
	Multifamily commercial real estate		320				143				—				463
	1-4 family residential construction and land		1,558				(315		)		—				1,243
	Total commercial real estate		14,730				2,903				(179		)		17,454
	Owner occupied commercial real estate		4,450				(1,443		)		(130		)		2,877
	Commercial and industrial loans		8,310				217				(172		)		8,355
	Lease financing		3				(2		)		—				1
	Total commercial		12,763				(1,228		)		(302		)		11,233
	1-4 family residential		21,724				(5,742		)		(102		)		15,880
	Home equity loans		3,869				530				(779		)		3,620
	Other consumer loans		2,682				3,267				(2,125		)		3,824
	Total consumer		28,275				(1,945		)		(3,006		)		23,324
	Other		1,083				318				(1,078		)		323
	Total loans		$	56,851			$	48			$	(4,565	)		$	52,334
	The following tables present the roll forward of the allowance for loan losses for the three and nine months ended September 30, 2013 by the class of loans against which the allowance is allocated:
	(Dollars in thousands)		June 30, 2013				Provision/				Net(Charge-offs)/				30-Sep-13
							(Reversals)				Recoveries
	Non-owner occupied commercial real estate		$	4,329			$	2,344			$	11			$	6,684
	Other commercial construction and land		12,310				(1,201		)		85				11,194
	Multifamily commercial real estate		258				44				—				302
	1-4 family residential construction and land		1,806				353				2				2,161
	Total commercial real estate		18,703				1,540				98				20,341
	Owner occupied commercial real estate		4,696				357				17				5,070
	Commercial and industrial loans		8,288				(264		)		(466		)		7,558
	Lease financing		—				3				—				3
	Total commercial		12,984				96				(449		)		12,631
	1-4 family residential		17,572				(1,040		)		51				16,583
	Home equity loans		3,937				(40		)		(120		)		3,777
	Other consumer loans		2,361				734				(565		)		2,530
	Total consumer		23,870				(346		)		(634		)		22,890
	Other		1,275				(306		)		(438		)		531
	Total loans		$	56,832			$	984			$	(1,423	)		$	56,393
	(Dollars in thousands)		31-Dec-12				Provision/				Net (Charge-offs)/				30-Sep-13
							(Reversals)				Recoveries
	Non-owner occupied commercial real estate		$	3,764			$	2,936			$	(16	)		$	6,684
	Other commercial construction and land		12,711				(2,120		)		603				11,194
	Multifamily commercial real estate		348				(87		)		41				302
	1-4 family residential construction and land		1,716				420				25				2,161
	Total commercial real estate		18,539				1,149				653				20,341
	Owner occupied commercial real estate		4,055				732				283				5,070
	Commercial and industrial loans		7,490				8,885				(8,817		)		7,558
	Lease financing		—				3				—				3
Total commercial		11,545				9,620				(8,534		)		12,631
1-4 family residential		15,740				772				71				16,583
Home equity loans		8,670				(3,861		)		(1,032		)		3,777
Other consumer loans		2,082				2,097				(1,649		)		2,530
Total consumer		26,492				(992		)		(2,610		)		22,890
Other		686				1,076				(1,231		)		531
Total loans		$	57,262			$	10,853			$	(11,722	)		$	56,393
Roll Forward of the Allowance for Loan Losses at the PCI and Non-PCI levels	'
	The following tables present the roll forward of the allowance for loan losses for PCI and non-PCI loans for the three and nine months ended September 30, 2014 and 2013, by the class of loans against which the allowance is allocated:
		Three Months Ended
	(Dollars in thousands)	30-Sep-14												30-Sep-13
		Non-PCI				PCI				Total				Non-PCI				PCI			Total
	Allowance for loan losses at the beginning of the period	$	20,835			$	34,472			$	55,307			$	17,640			$	39,192		$	56,832
	Charge-offs:
	Non-owner occupied commercial real estate	(88		)		—				(88		)		—				—			—
	Other commercial construction and land	—				—				—				(50		)		—			(50		)
	Multifamily commercial real estate	—				—				—				—				—			—
	1-4 family residential construction and land	(4		)		—				(4		)		—				—			—
	Total commercial real estate	(92		)		—				(92		)		(50		)		—			(50		)
	Owner occupied commercial real estate	(12		)		—				(12		)		—				—			—
	Commercial and industrial loans	(283		)		—				(283		)		(544		)		—			(544		)
	Lease financing	—				—				—				—				—			—
	Total commercial	(295		)		—				(295		)		(544		)		—			(544		)
	1-4 family residential	(13		)		—				(13		)		(9		)		—			(9		)
	Home equity loans	(337		)		—				(337		)		(3		)		—			(3		)
	Other consumer loans	(984		)		—				(984		)		(685		)		—			(685		)
	Total consumer	(1,334		)		—				(1,334		)		(697		)		—			(697		)
	Other	(585		)		—				(585		)		(654		)		—			(654		)
	Total charge-offs	(2,306		)		—				(2,306		)		(1,945		)		—			(1,945		)
	Recoveries:
	Non-owner occupied commercial real estate	207				—				207				11				—			11
	Other commercial construction and land	11				—				11				135				—			135
	Multifamily commercial real estate	—				—				—				—				—			—
	1-4 family residential construction and land	2				—				2				2				—			2
	Total commercial real estate	220				—				220				148				—			148
	Owner occupied commercial real estate	2				—				2				17				—			17
	Commercial and industrial loans	106				—				106				78				—			78
	Lease financing	—				—				—				—				—			—
	Total commercial	108				—				108				95				—			95
	1-4 family residential	5				—				5				60				—			60
	Home equity loans	38				—				38				(117		)		—			(117		)
	Other consumer loans	133				—				133				120				—			120
	Total consumer	176				—				176				63				—			63
	Other	161				—				161				216				—			216
	Total recoveries	665				—				665				522				—			522
	Net charge-offs	(1,641		)		—				(1,641		)		(1,423		)		—			(1,423		)
	Provision (reversal) for loan losses:
	Non-owner occupied commercial real estate	(76		)		(1,696		)		(1,772		)		153				2,191			2,344
	Other commercial construction and land	493				908				1,401				(242		)		(959		)	(1,201		)
	Multifamily commercial real estate	23				(40		)		(17		)		(13		)		57			44
	1-4 family residential construction and land	(70		)		(316		)		(386		)		38				315			353
	Total commercial real estate	370				(1,144		)		(774		)		(64		)		1,604			1,540
	Owner occupied commercial real estate	(29		)		(401		)		(430		)		(99		)		456			357
	Commercial and industrial loans	66				(179		)		(113		)		47				(311		)	(264		)
	Lease financing	—				—				—				3				—			3
	Total commercial	37				(580		)		(543		)		(49		)		145			96
	1-4 family residential	395				(1,645		)		(1,250		)		87				(1,127		)	(1,040		)
	Home equity loans	389				(760		)		(371		)		(6		)		(34		)	(40		)
	Other consumer loans	1,239				5				1,244				711				23			734
	Total consumer	2,023				(2,400		)		(377		)		792				(1,138		)	(346		)
	Other	443				(81		)		362				377				(683		)	(306		)
	Total provision (reversal) for loan losses	2,873				(4,205		)		(1,332		)		1,056				(72		)	984
	Allowance for loan losses at the end of the period	$	22,067			$	30,267			$	52,334			$	17,273			$	39,120		$	56,393
	(Dollars in thousands)	Nine Months Ended
		30-Sep-14												30-Sep-13
		Non-PCI				PCI				Total				Non-PCI				PCI			Total
	Allowance for loan losses at the beginning of the period	$	18,951			$	37,900			$	56,851			$	17,439			$	39,823		$	57,262
	Charge-offs:
	Non-owner occupied commercial real estate	(292		)		—				(292		)		(92		)		—			(92		)
	Other commercial construction and land	(207		)		—				(207		)		(152		)		—			(152		)
	Multifamily commercial real estate	—				—				—				—				—			—
1-4 family residential construction and land	(6		)		—				(6		)		—				—			—
Total commercial real estate	(505		)		—				(505		)		(244		)		—			(244		)
Owner occupied commercial real estate	(156		)		—				(156		)		—				—			—
Commercial and industrial loans	(444		)		—				(444		)		(9,555		)		—			(9,555		)
Lease financing	—				—				—				—				—			—
Total commercial	(600		)		—				(600		)		(9,555		)		—			(9,555		)
1-4 family residential	(114		)		—				(114		)		(37		)		—			(37		)
Home equity loans	(931		)		—				(931		)		(1,370		)		—			(1,370		)
Other consumer loans	(2,572		)		—				(2,572		)		(2,066		)		—			(2,066		)
Total consumer	(3,617		)		—				(3,617		)		(3,473		)		—			(3,473		)
Other	(1,716		)		—				(1,716		)		(2,063		)		—			(2,063		)
Total charge-offs	(6,438		)		—				(6,438		)		(15,335		)		—			(15,335		)
Recoveries:
Non-owner occupied commercial real estate	297				—				297				76				—			76
Other commercial construction and land	23				—				23				755				—			755
Multifamily commercial real estate	—				—				—				41				—			41
1-4 family residential construction and land	6				—				6				25				—			25
Total commercial real estate	326				—				326				897				—			897
Owner occupied commercial real estate	26				—				26				283				—			283
Commercial and industrial loans	272				—				272				738				—			738
Lease financing	—				—				—				—				—			—
Total commercial	298				—				298				1,021				—			1,021
1-4 family residential	12				—				12				108				—			108
Home equity loans	152				—				152				338				—			338
Other consumer loans	447				—				447				417				—			417
Total consumer	611				—				611				863				—			863
Other	638				—				638				832				—			832
Total recoveries	1,873				—				1,873				3,613				—			3,613
Net charge-offs	(4,565		)		—				(4,565		)		(11,722		)		—			(11,722		)
Provision (reversal) for loan losses:
Non-owner occupied commercial real estate	105				(1,911		)		(1,806		)		(46		)		2,982			2,936
Other commercial construction and land	992				3,889				4,881				(769		)		(1,351		)	(2,120		)
Multifamily commercial real estate	(1		)		144				143				(60		)		(27		)	(87		)
1-4 family residential construction and land	(140		)		(175		)		(315		)		145				275			420
Total commercial real estate	956				1,947				2,903				(730		)		1,879			1,149
Owner occupied commercial real estate	10				(1,453		)		(1,443		)		(654		)		1,386			732
Commercial and industrial loans	448				(231		)		217				8,226				659			8,885
Lease financing	(2		)		—				(2		)		3				—			3
Total commercial	456				(1,684		)		(1,228		)		7,575				2,045			9,620
1-4 family residential	952				(6,694		)		(5,742		)		232				540			772
Home equity loans	1,003				(473		)		530				1,014				(4,875		)	(3,861		)
Other consumer loans	3,326				(59		)		3,267				2,234				(137		)	2,097
Total consumer	5,281				(7,226		)		(1,945		)		3,480				(4,472		)	(992		)
Other	988				(670		)		318				1,231				(155		)	1,076
Total provision (reversal) for loan losses	7,681				(7,633		)		48				11,556				(703		)	10,853
Allowance for loan losses at the end of the period	$	22,067			$	30,267			$	52,334			$	17,273			$	39,120		$	56,393
Summary of Allowance for Loan Losses and Recorded Investment in Loans by Class of Loans and by Impairment Evaluation	'
	he following table presents the balance in the allowance for loan losses and the recorded investment in loans by class of loan and by impairment evaluation method as of September 30, 2014:
	(Dollars in thousands)	Allowance for Loan Losses												Loans
		Individually				Collectively				Purchased				Individually				Collectively			Purchased
		Evaluated				Evaluated				Credit-				Evaluated				Evaluated			Credit-
		for				for				Impaired				for				for			Impaired
		Impairment				Impairment								Impairment				Impairment (1)
	Non-owner occupied commercial real estate	$	—			$	1,725			$	1,109			$	—			$	388,485		$	408,712
	Other commercial construction and land	—				2,009				10,905				—				88,279			155,284
	Multifamily commercial real estate	—				115				348				—				41,302			29,817
	1-4 family residential construction and land	—				925				318				—				65,428			11,014
	Total commercial real estate	—				4,774				12,680				—				583,494			604,827
	Owner occupied commercial real estate	—				2,491				386				3,503				738,125			285,225
	Commercial and industrial loans	—				7,153				1,202				6,095				843,496			110,050
	Lease financing	—				1				—				—				2,175			—
	Total commercial	—				9,645				1,588				9,598				1,583,796			395,275
	1-4 family residential	—				3,129				12,751				—				564,315			342,465
	Home equity loans	26				596				2,998				304				277,799			95,501
	Other consumer loans	8				3,511				305				129				235,704			6,618
	Total consumer	34				7,236				16,054				433				1,077,818			444,584
	Other	—				378				(55		)		—				73,844			43,663
	Total loans	$	34			$	22,033			$	30,267			$	10,031			$	3,318,952		$	1,488,349
	-1	Loans collectively evaluated for impairment include $375.5 million of acquired loans which are presented net of unamortized purchase discounts of $13.1 million.
	The following table presents the balance in the allowance for loan losses and the recorded investment in loans by class of loan and by impairment evaluation method as of December 31, 2013:
	(Dollars in thousands)	Allowance for Loan Losses												Loans
		Individually				Collectively				Purchased				Individually				Collectively			Purchased
		Evaluated				Evaluated				Credit-				Evaluated				Evaluated			Credit-
		for				for				Impaired				for				for			Impaired
		Impairment				Impairment								Impairment				Impairment (1)
	Non-owner occupied commercial real estate	$	—			$	1,615			$	3,020			$	877			$	286,685		$	488,171
	Other commercial construction and land	—				1,201				7,016				—				67,789			232,705
	Multifamily commercial real estate	—				116				204				—				29,187			38,501
	1-4 family residential construction and land	—				1,065				493				—				56,979			14,372
	Total commercial real estate	—				3,997				10,733				877				440,640			773,749
	Owner occupied commercial real estate	—				2,611				1,839				4,844				686,409			366,895
	Commercial and industrial loans	507				6,370				1,433				9,623				654,296			139,817
	Lease financing	—				3				—				—				2,676			—
	Total commercial	507				8,984				3,272				14,467				1,343,381			506,712
	1-4 family residential	—				2,279				19,445				—				377,668			418,642
	Home equity loans	—				398				3,471				—				270,170			116,196
	Other consumer loans	5				2,313				364				207				157,784			12,535
	Total consumer	5				4,990				23,280				207				805,622			547,373
	Other	—				468				615				273				61,006			49,710
	Total loans	$	512			$	18,439			$	37,900			$	15,824			$	2,650,649		$	1,877,544
	-1	Loans collectively evaluated for impairment include $435.0 million of acquired loans which are presented net of unamortized purchase discounts of $14.7 million.

FDIC_Indemnification_Asset_Tab

FDIC Indemnification Asset (Tables)	9 Months Ended
	Sep. 30, 2014
Text Block [Abstract]	'
Schedule of FDIC Indemnification Asset	'
	The following is a summary of the activity in the FDIC indemnification asset:
	(Dollars in thousands)
	Balance, December 31, 2013	$	33,610
	Indemnification asset expense	(977		)
	Amortization of indemnification asset	(7,133		)
	Cash received on reimbursable losses	(4,475		)
	Balance, September 30, 2014	$	21,025
	Balance, December 31, 2012	$	49,417
	Indemnification asset income	2,003
	Amortization of indemnification asset	(5,782		)
	Cash received on reimbursable losses	(8,801		)
	Balance, September 30, 2013	$	36,837

Other_Real_Estate_Owned_Tables

Other Real Estate Owned (Tables)	9 Months Ended
	Sep. 30, 2014
Banking and Thrift [Abstract]	'
Other Real Estate Owned	'
	(Dollars in thousands)	Three Months Ended						Nine Months Ended
		30-Sep-14			30-Sep-13			30-Sep-14			30-Sep-13
	Balance, beginning of period	$	96,283		$	142,793		$	129,396		$	154,093
	Real estate acquired from borrowers	12,590			10,585			30,452			53,366
	Valuation allowance	(2,752		)	(6,045		)	(9,347		)	(18,844		)
	Properties sold	(15,844		)	(17,679		)	(60,224		)	(58,961		)
	Balance, end of period	$	90,277		$	129,654		$	90,277		$	129,654

Federal_Home_Loan_Bank_Advance1

Federal Home Loan Bank Advances and Short-Term Borrowings (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Federal Home Loan Bank Advance Owed	'
	The advances as of September 30, 2014 and December 31, 2013 consisted of the following:
	(Dollars in thousands)
	Contractual
	Outstanding
	Amount
	30-Sep-14		Maturity Date	Fixed Contractual Rate
	$	50,000	October 23, 2014	0.24%
	40,000		November 25, 2014	0.22%
	60,000		December 26, 2014	0.18%
	75,000		May 19, 2015	0.36%
	614		November 6, 2017	0.50%
	524		February 10, 2026	—%
	$	226,138
	(Dollars in thousands)
	Contractual
	Outstanding
	Amount
	31-Dec-13		Maturity Date	Fixed Contractual Rate
	$	95,000	May 16, 2014	0.36%
	724		November 6, 2017	0.50%
	554		February 10, 2026	—%
	$	96,278

LongTerm_Borrowings_Tables

Long-Term Borrowings (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Outstanding Structured Repurchase Agreements	'
	The repurchase agreements as of September 30, 2014 and December 31, 2013 consisted of the following:
	(Dollars in thousands)
	Carrying Amount
	30-Sep-14				31-Dec-13				Contractual Amount				Maturity Date	Contractual Rate
	$	10,611			$	10,823			$	10,000			November 6, 2016	4.75%
	10,646				10,833				10,000				March 30, 2017	4.50%
	10,426				10,521				10,000				December 18, 2017	3.79%
	10,403				10,492				10,000				December 18, 2017	3.72%
	10,674				10,780				10,000				March 22, 2019	3.56%
	$	52,760			$	53,449			$	50,000
Summary of Subordinated Debentures	'
	The subordinated debentures as of September 30, 2014 and December 31, 2013 consisted of the following:
	(Dollars in thousands)
							Carrying Amount
	Date of Offering		Face Amount				30-Sep-14				31-Dec-13			Interest Rate as of September 30, 2014			Maturity Date
	July 31, 2001		$	5,000			$	3,887			$	3,851		3.82	%	(3 Month LIBOR+358 bps)	July 31, 2031
	July 31, 2001		4,000				2,683				2,636			3.82	%	(3 Month LIBOR+358 bps)	July 31, 2031
	June 26, 2003		10,000				5,992				5,921			3.34	%	(3 Month LIBOR+310 bps)	June 26, 2033
	September 25, 2003		10,000				6,478				6,368			3.08	%	(3 Month LIBOR+285 bps)	September 25, 2033
	December 30, 2003		10,000				5,776				5,704			3.09	%	(3 Month LIBOR+285 bps)	December 30, 2033
	June 28, 2005		3,000				1,582				1,545			1.91	%	(3 Month LIBOR+168 bps)	June 28, 2035
	December 22, 2005		10,000				4,577				4,491			1.63	%	(3 Month LIBOR+140 bps)	March 15, 2036
	December 28, 2005		13,000				6,615				6,458			1.77	%	(3 Month LIBOR+154 bps)	March 15, 2036
	June 23, 2006		20,000				11,417				11,206			1.78	%	(3 Month LIBOR+155 bps)	July 7, 2036
	May 16, 2007		56,000				28,688				28,050			1.88	%	(3 Month LIBOR+165 bps)	June 15, 2037
	June 15, 2007		10,000				5,401				5,327			1.66	%	(3 Month LIBOR+143 bps)	September 6, 2037
			$	151,000			$	83,096			$	81,557
Schedule of Maturities of Long-Term Borrowings	'
	At September 30, 2014, the maturities of long-term borrowings were as follows:
	(Dollars in thousands)		Fixed Rate				Floating Rate				Total
	Due in 2014 through 2015		$	—			$	—			$	—
	Due in 2016		10,611				—				10,611
	Due in 2017		31,475				—				31,475
	Due in 2018		—				—				—
	Thereafter		14,214				83,096				97,310
	Total		$	56,300			$	83,096			$	139,396

Shareholders_Equity_and_Minimu1

Shareholders' Equity and Minimum Regulatory Capital Requirements (Tables)	9 Months Ended
	Sep. 30, 2014
Banking and Thrift [Abstract]	'
Minimum Ratios Along with the Actual Ratios for the Company and the Bank	'
	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
		Requirement		Requirement
	September 30, 2014	Amount	Ratio	Amount	Ratio	Amount		Ratio
	Tier 1 Capital
	(to Average Assets)
	CBF Consolidated	N/A	N/A	$251,319	≥ 4.0%	$	923,231	14.40%
	Capital Bank, N.A.	$313,810	≥ 5.0%	$251,048	≥ 4.0%	$	855,566	13.40%
	Tier 1 Capital
	(to Risk Weighted Assets)
	CBF Consolidated	N/A	N/A	$197,728	≥ 4.0%	$	923,231	18.40%
	Capital Bank, N.A.	$296,245	≥ 6.0%	$197,497	≥ 4.0%	$	855,566	17.10%
	Total Capital
	(to Risk Weighted Assets)
	CBF Consolidated	N/A	N/A	$395,456	≥ 8.0%	$	979,541	19.50%
	Capital Bank, N.A.	$493,742	≥ 10.0%	$394,994	≥ 8.0%	$	911,730	18.20%
	(Dollars in thousands)	Well Capitalized		Adequately Capitalized		Actual
		Requirement		Requirement
	31-Dec-13	Amount	Ratio	Amount	Ratio	Amount		Ratio
	Tier 1 Capital
	(to Average Assets)
	CBF Consolidated	N/A	N/A	$254,126	≥ 4.0%	$	949,619	14.90%
	Capital Bank, N.A.	$317,562	≥ 5.0%	$254,050	≥ 4.0%	$	849,520	13.40%
	Tier 1 Capital
	(to Risk Weighted Assets)
	CBF Consolidated	N/A	N/A	$192,428	≥ 4.0%	$	949,619	19.70%
	Capital Bank, N.A.	$288,410	≥ 6.0%	$192,273	≥ 4.0%	$	849,520	17.70%
	Total Capital
	(to Risk Weighted Assets)
	CBF Consolidated	N/A	N/A	$384,856	≥ 8.0%	$	1,010,422	21.00%
	Capital Bank, N.A.	$480,683	≥ 10.0%	$384,546	≥ 8.0%	$	910,162	18.90%

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Summary of Components and Classification of Stock-Based Compensation Expense	'
	The following table summarizes the components and classification of stock-based compensation expense for the three and nine months ended September 30, 2014 and 2013.
	(Dollars in thousands)	Three Months Ended							Nine Months Ended
		30-Sep-14			30-Sep-13				30-Sep-14				30-Sep-13
	Stock options	$	195		$	215			$	560			$	395
	Restricted stock	248			1,156				1,631				3,917
	Total stock-based compensation expense	$	443		$	1,371			$	2,191			$	4,312
Summary of Weighted Average Assumptions to Compute the Grant-Date Fair Value of Options	'
	The following table summarizes the weighted average assumptions used to compute the grant-date fair value of options granted during the nine months ended September 30, 2013:
		Nine Months Ended September 30, 2013
	Dividend yield	—%
	Risk-free interest rate	1.00%
	Expected option life	5.75 years
	Volatility	37.00%
	Weighted average grant-date fair value of options granted	$6.52
Summary of Stock Option Activity	'
	A summary of the stock option activity for the nine months ended September 30, 2014 and 2013 is as follows:
		Nine Months Ended
		September 30, 2014						September 30, 2013
	(Shares in thousands)	Shares		Weighted				Shares			Weighted
				Average							Average
				Exercise Price Per Share							Exercise Price
											Per Share
	Balance, January 1,	3,123		$	20.5			2,890			$	21.39
	Granted	—		—				264			18
	Exercised	—		—				—			—
	Canceled, expired or forfeited	(11	)	75.94				(21	)		113.8
	Balance, September 30,	3,112		$	20.3			3,133			$	20.5
Summary of Options Outstanding	'
	Options outstanding at September 30, 2014 were as follows:
	(Shares in thousands)	Outstanding Options								Exercisable Options
	Range of Exercise Prices	Shares		Weighted		Weighted				Shares			Weighted
				Average		Average							Average
				Remaining		Exercise Price							Exercise Price
				Contractual		Per							Per
				Life		Share							Share
	$18.00	236		8.64 years		$	18			118			$	18
	$20.00	2,864		5.68 years		20				2,864			20
	$28.44 - $2,026.00	12		3.23 years		138.87				12			138.87
	$18.00 - $2,026.00	3,112		5.90 years		$	20.3			2,994			$	20.39
Summary of Unvested Restricted Stock Awards	'
	The following table summarizes unvested restricted stock activity for the nine months ended September 30, 2014 and 2013:
		Nine Months Ended
		September 30, 2014						September 30, 2013
	(Shares in thousands)	Shares		Weighted				Shares			Weighted
				Average							Average
				Grant-Date							Grant-Date
				Fair Value							Fair Value
				Per Share							Per Share
	Balance, January 1,	1,215		$	14.28			1,212			$	14.27
	Granted	—		—				4			18
	Vested or released	(405	)	15.07				—			—
	Canceled, expired or forfeited	—		—				—			—
	Balance, September 30,	810		$	13.89			1,216			$	14.28

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2014
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 is as follows for the three and nine months ended September 30, 2014 and 2013:
	(Dollars in thousands)	Three Months Ended						Nine Months Ended
		30-Sep-14			30-Sep-13			30-Sep-14			30-Sep-13
	Income before income taxes	$	21,296		$	20,419		$	59,959		$	46,736
	Income taxes computed at Federal statutory tax rate	7,454			7,147			20,986			16,358
	Effect of:
	State taxes (net of federal benefit)	754			784			2,237			1,795
	State statutory rate change	—			1,545			—			1,545
	Tax-exempt interest income, net	(152		)	(163		)	(485		)	(503		)
	Contingent value right expense	97			(301		)	480			1,156
	Other, net	(100		)	(37		)	(341		)	(253		)
	Total income tax expense	$	8,053		$	8,975		$	22,877		$	20,098

Fair_Value_Tables

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2014
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 are summarized below as of September 30, 2014:
	(Dollars in thousands)					Fair Value Measurement Using:
			Total			Quoted Prices			Significant		Significant
						in Active			Other		Unobservable
						Markets for			Observable		Inputs
						Identical Assets			Inputs		(Level 3)
						(Level 1)			(Level 2)
	Assets
	Trading securities		$	2,312		$	—		$	2,312	$	—
	Available-for-sale securities:
	Mortgage-backed securities—residential		576,062			—			576,062		—
	Industrial revenue bonds		3,724			—			—		3,724
	Marketable equity securities		946			—			946		—
	Available-for-sale securities		$	580,732		$	—		$	577,008	$	3,724
	Gross asset value of derivatives		$	15		$	—		$	15	$	—
	Liabilities
	Gross liability value of derivatives		$	21		$	—		$	21	$	—
	There were no transfers of assets and liabilities between levels of the fair value hierarchy during the three and nine months ended September 30, 2014.
	Assets and liabilities measured at fair value on a recurring basis are summarized below as of December 31, 2013:
	(Dollars in thousands)					Fair Value Measurement Using:
			Total			Quoted Prices			Significant				Significant
						in Active			Other				Unobservable
						Markets for			Observable				Inputs
						Identical Assets			Inputs				(Level 3)
						(Level 1)			(Level 2)
	Assets
	Trading securities		$	6,348		$	4,477		$	1,871	(1	)	$	—
	Available-for-sale securities:
	Asset-backed securities		133,225			—			133,225				—
	Mortgage-backed securities-residential		546,626			—			546,626				—
	Industrial revenue bonds		3,859			—			—				3,859
	Marketable equity securities		931			—			931		(1	)	—
	Collateralized debt obligations		800			—			800				—
	Available-for-sale securities		$	685,441		$	—		$	681,582			$	3,859
	Gross asset value of derivatives		$	15		$	—		$	15			$	—
	Liabilities
	Gross liability value of derivatives		$	1,330		$	—		$	1,330			$	—
	-1	Transferred from Level 1 to Level 2 due to limited observable market data.
Fair Value Measurements on Recurring Basis Using Significant Unobservable Inputs (Level 3)	'
	The tables below present 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 and nine months ended and held at September 30, 2014:
	(Dollars in thousands)	Fair Value Measurement Using
		Significant Unobservable
		Inputs (Level 3)
		Industrial
		Revenue Bonds
	Beginning balance, June 30, 2014	$	3,736
	Included in other comprehensive income	(12		)
	Ending balance, September 30, 2014	$	3,724
	(Dollars in thousands)	Fair Value Measurement Using
		Significant Unobservable
		Inputs (Level 3)
		Industrial
		Revenue Bonds
	Beginning balance, January 1, 2014	$	3,859
	Principal reduction	(170		)
	Included in other comprehensive income	35
	Ending balance, September 30, 2014	$	3,724
	The tables below present 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 and nine months ended and held at September 30, 2013:
	(Dollars in thousands)		Fair Value Measurement Using Significant
			Unobservable Inputs (Level 3)
			Corporate Bonds			Industrial			Collateralized
						Revenue			Debt
						Bonds			Obligations
	Beginning balance, June 30, 2013		$	—		$	3,872		$	301
	Included in other comprehensive income		—			93			28
	Ending balance, September 30, 2013		$	—		$	3,965		$	329
	(Dollars in thousands)		Fair Value Measurement Using Significant
			Unobservable Inputs (Level 3)
			Corporate Bonds			Industrial			Collateralized
						Revenue			Debt
						Bonds			Obligations
	Beginning balance, January 1, 2013		$	26		$	3,800		$	297
	Included in earnings-gain on sales		199			—			—
	Included in other comprehensive income		—			165			32
	Sales		(225		)	—			—
	Ending balance, September 30, 2013		$	—		$	3,965		$	329
Quantitative Information About Recurring Level 3 Fair Value Measurements	'
	(Dollars in thousands)		Fair Value at			Valuation Technique		Significant	Range
			September 30, 2014					Unobservable
								Input
	Industrial revenue bonds		$	3,724		Discounted cash flow		Discount rate	3.20%
								Illiquidity factor	0.50%
	(Dollars in thousands)		Fair Value at			Valuation Technique		Significant	Range
			December 31, 2013					Unobservable
								Input
	Industrial revenue bonds		$	3,859		Discounted cash flow		Discount rate	3.7%-3.9%
								Illiquidity factor	0.50%
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis	'
	Assets and liabilities measured at fair value on a nonrecurring basis are summarized below as of September 30, 2014:
	(Dollars in thousands)		Fair Value Measurement Using:
			Quoted Prices in			Significant			Significant
			Active Markets			Other			Unobservable
			for Identical			Observable			Inputs
			Assets			Inputs			(Level 3)
			(Level 1)			(Level 2)
	Assets
	Other real estate owned		$	—		$	—		$	77,856
	Other repossessed assets		—			144			—
	Other real estate owned measured at fair value as of September 30, 2014 had a carrying amount of $99.5 million, less valuation allowances totaling $21.6 million. Other repossessed assets are primarily comprised of repossessed vehicles and equipment and are measured at fair value as of the date of repossession.
	Assets and liabilities measured at fair value on a nonrecurring basis are summarized below as of December 31, 2013:
	(Dollars in thousands)		Fair Value Measurement Using:
			Quoted Prices in			Significant			Significant
			Active Markets			Other			Unobservable
			for Identical			Observable			Inputs
			Assets			Inputs			(Level 3)
			(Level 1)			(Level 2)
	Assets
	Other real estate owned		$	—		$	—		$	118,579
	Other repossessed assets		—			108			—
	Impaired loans		—			—			1,332
Quantitative Information About Nonrecurring Level 3 Fair Value Measurements	'
	(Dollars in thousands)		Fair Value at			Valuation Technique		Significant Unobservable Input	Range
			September 30, 2014
	Other real estate owned		$	77,856		Fair value of property		Appraised value less cost to sell	6%-10%
	(Dollars in thousands)		Fair Value at			Valuation Technique		Significant Unobservable Input	Range
			December 31, 2013
	Other real estate owned		$	118,579		Fair value of property		Appraised value less cost to sell	7%-10%
	Impaired loans		1,332			Fair value of collateral		Appraised value less cost to sell	8%
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
	September 30, 2014		Carrying Value			Estimated			Level 1		Level 2			Level 3
						Fair Value
	Financial Assets
	Cash and cash equivalents		$	159,410		$	159,410		$	159,410	$	—		$	—
	Trading securities		2,312			2,312			—		2,312			—
	Investment securities available-for-sale		580,732			580,732			—		577,008			3,724
	Investment securities held-to-maturity		454,809			457,712			—		457,712			—
	Loans, net		4,771,437			4,917,215			—		6,439			4,910,776
	FDIC indemnification asset		21,025			21,025			—		—			21,025
	Receivable from FDIC		3,491			3,491			—		3,491			—
	Other earning assets (1)		47,796			47,796			—		—			47,796
	Gross asset value of derivatives		15			15			—		15			—
	Total financial assets		$	6,041,027		$	6,189,708		$	159,410	$	1,046,977		$	4,983,321
	Financial Liabilities
	Non-contractual deposits		3,745,350			3,745,350			—		—			3,745,350
	Contractual deposits		1,430,106			1,428,890			—		—			1,428,890
	Federal Home Loan Bank advances		226,138			226,073			—		226,073			—
	Short-term borrowings		23,823			23,823			—		23,823			—
	Long-term borrowings		52,760			54,454			—		—			54,454
	Subordinated debentures		86,636			98,156			—		—			98,156
	Gross liability value of derivatives		21			21			—		21			—
	Total financial liabilities		$	5,564,834		$	5,576,767		$	—	$	249,917		$	5,326,850
	(Dollars in thousands)		Fair Value Measurement
	December 31, 2013		Carrying Value			Estimated			Level 1		Level 2			Level 3
						Fair Value
	Financial Assets
	Cash and cash equivalents		$	164,441		$	164,441		$	164,441	$	—		$	—
	Trading securities		6,348			6,348			4,477		1,871			—
	Investment securities available-for-sale		685,441			685,441			—		681,582			3,859
	Investment securities held-to-maturity		465,098			459,693			—		459,693			—
	Loans, net		4,495,178			4,681,554			—		8,012			4,673,542
	FDIC indemnification asset		33,610			33,610			—		—			33,610
	Receivable from FDIC		7,624			7,624			—		7,624			—
	Other earning assets (1)		44,088			44,088			—		—			44,088
	Gross asset value of derivatives		15			15			—		15			—
	Total financial assets		$	5,901,843		$	6,082,814		$	168,918	$	1,158,797		$	4,755,099
	Financial Liabilities
	Non-contractual deposits		$	3,737,566		$	3,737,566		$	—	$	—		$	3,737,566
	Contractual deposits		1,447,497			1,448,032			—		—			1,448,032
	Federal Home Loan Bank advances		96,278			96,241			—		96,241			—
	Short-term borrowings		24,850			24,850			—		24,850			—
	Long-term borrowings		53,449			55,861			—		—			55,861
	Subordinated debentures		85,112			100,795			—		—			100,795
	Gross liability value of derivatives		1,330			1,330			—		1,330			—
	Total financial liabilities		$	5,446,082		$	5,464,675		$	—	$	122,421		$	5,342,254
	(1) Includes Federal Reserve Bank, Federal Home Loan Bank and Bankers Bank stock.

Derivative_Instruments_Tables

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Summary of Derivative Instrument Contracts Fair Value and Notional Amount	'
	The Company’s derivative instrument contracts which are recorded in other assets and other liabilities on the Company’s balance sheets consist of the following:
	(Dollars in thousands)	30-Sep-14				December 31, 2013
		Fair Value		Notional		Fair Value		Notional
				Amount				Amount
	Assets
	Interest rate cap contracts (matured in 2014)	$	—	$	—	$	—	$	12,500
	Forward loan sales contracts (maturing in 2014)	15		6,054		15		4,215
	Total assets	$	15	$	6,054	$	15	$	16,715
	Liabilities
	Interest rate swaps associated with certificates of deposits (maturing in 2040)	$	—	$	—	$	1,320	$	25,000
	Forward loan sales contracts (maturing in 2014)	21		8,096		10		3,545
	Total liabilities	$	21	$	8,096	$	1,330	$	28,545

Basis_of_Presentation_Addition

Basis of Presentation - Additional Information (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Mar. 31, 2014
	Office		Prior Period Adjustment
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Total number of full service banking offices	162	'	'
Goodwill	$134,522	$131,987	$2,500

Earnings_Per_Common_Share_Comp

Earnings Per Common Share - Computation of Earnings Per Share (Detail)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Weighted average number of shares outstanding:	'	'	'	'
Basic (in shares)	47,912	51,804	49,164	53,170
Diluted (in shares)	49,069	52,755	50,406	54,032
Stock Options	'	'	'	'
Weighted average number of shares outstanding:	'	'	'	'
Dilutive effect (in shares)	498	31	490	0
Restricted Stock Awards	'	'	'	'
Weighted average number of shares outstanding:	'	'	'	'
Dilutive effect (in shares)	659	920	752	862

Earnings_Per_Common_Share_Weig

Earnings Per Common Share - Weighted Average Anti-Dilutive Stock Options and Unvested Restricted Shares Excluded from the Computation of Diluted Earnings Per Share (Detail)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Stock Options	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive (in shares)	12	269	12	3,133
Restricted Stock Awards	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive (in shares)	0	0	0	0

Investment_Securities_Amortize

Investment Securities - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale and Held to Maturity (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	$582,623	$688,717
Unrealized Gains	1,280	3,104
Unrealized Losses	3,171	6,380
Estimated Fair Value	580,732	685,441
Amortized Cost	454,809	465,098
Unrealized Gains	3,297	355
Unrealized Losses	394	5,760
Estimated Fair Value	457,712	459,693
Asset-Backed Securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	'	133,647
Unrealized Gains	'	363
Unrealized Losses	'	785
Estimated Fair Value	'	133,225
Marketable Equity Securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	946	946
Unrealized Gains	0	0
Unrealized Losses	0	15
Estimated Fair Value	946	931
Mortgage-Backed Securities-Residential Issued by Government Sponsored Entities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	578,097	549,869
Unrealized Gains	1,136	2,337
Unrealized Losses	3,171	5,580
Estimated Fair Value	576,062	546,626
Amortized Cost	402,012	435,380
Unrealized Gains	2,638	328
Unrealized Losses	362	5,218
Estimated Fair Value	404,288	430,490
Industrial Revenue Bonds	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	3,580	3,750
Unrealized Gains	144	109
Unrealized Losses	0	0
Estimated Fair Value	3,724	3,859
U.S. Government Agencies	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	14,288	14,972
Unrealized Gains	0	0
Unrealized Losses	32	401
Estimated Fair Value	14,256	14,571
US States and Political Subdivisions | State and Political Subdivisions-Tax Exempt	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	12,970	14,201
Unrealized Gains	475	27
Unrealized Losses	0	129
Estimated Fair Value	13,445	14,099
US States and Political Subdivisions | State and Political Subdivisions-Taxable	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	539	545
Unrealized Gains	21	0
Unrealized Losses	0	12
Estimated Fair Value	560	533
Collateralized Debt Obligations	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	'	505
Unrealized Gains	'	295
Unrealized Losses	'	0
Estimated Fair Value	'	800
Corporate Bonds	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	25,000	'
Unrealized Gains	163	'
Unrealized Losses	0	'
Estimated Fair Value	$25,163	'

Investment_Securities_Estimate

Investment Securities - Estimated Fair Value of Investment Securities Available for Sale and Held to Maturity by Contractual Maturity (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]	'	'
Amortized Cost	$582,623	$688,717
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]	'	'
Total, estimated fair value	580,732	685,441
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]	'	'
Total, amortized cost	454,809	465,098
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value [Abstract]	'	'
Total, estimated fair value	457,712	459,693
Total, Yield	2.56%	'
Debt Securities	'	'
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]	'	'
Due in one year or less, Amortized Cost	0	'
Due after one year through five years, Amortized Cost	0	'
Due after five years through ten years, Amortized Cost	3,580	'
Due after ten years, Amortized Cost	0	'
Available-for-sale debt securities, Amortized Cost	581,677	'
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]	'	'
Due in one year or less, Estimated Fair Value	0	'
Due after one year through five years, Estimated Fair Value	0	'
Due after five years through ten years, Estimated Fair Value	3,724	'
Due after ten years, Estimated Fair Value	0	'
Estimated Fair Value, Gross	579,786	'
Due in one year or less, Yield	0.00%	'
Due after one year through five years, Yield	0.00%	'
Due after five years through ten years, Yield	2.23%	'
Due after ten years, Yield	0.00%	'
Available for sale securities-Debt securities to yield	1.78%	'
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]	'	'
Due in one year or less, Amortized Cost	203	'
Due after one year through five years, Amortized Cost	10,818	'
Due after five years through ten years, Amortized Cost	24,882	'
Due after ten years, Amortized Cost	16,894	'
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value [Abstract]	'	'
Due in one year or less, Estimated Fair Value	204	'
Due after one year through five years, Estimated Fair Value	10,882	'
Due after five years through ten years, Estimated Fair Value	25,354	'
Due after ten years, Estimated Fair Value	16,984	'
Due in one year or less, Yield	0.76%	'
Due after one year through five years, Yield	4.65%	'
Due after five years through ten years, Yield	4.52%	'
Due after ten years, Yield	2.97%	'
Mortgage-Backed Securities-Residential Issued by Government Sponsored Entities	'	'
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]	'	'
Mortgage-backed securities residential, Amortized Cost	578,097	'
Amortized Cost	578,097	549,869
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]	'	'
Mortgage-backed securities-residential	576,062	'
Total, estimated fair value	576,062	546,626
Mortgage-backed securities-residential, Yield	1.78%	'
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]	'	'
Total, amortized cost	402,012	'
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value [Abstract]	'	'
Total, estimated fair value	404,288	430,490
Mortgage-backed securities-residential, Yield	2.36%	'
Marketable Equity Securities	'	'
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]	'	'
Available-for-sale equity securities, Amortized Cost	946	'
Amortized Cost	946	946
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]	'	'
Total, estimated fair value	$946	$931

Investment_Securities_Securiti

Investment Securities - Securities with Unrealized Losses Not Recognized in Income (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Estimated Fair Value, Less than 12 Months, Available-for-sale	$329,422	$443,331
Estimated Fair Value, 12 Months or Longer, Available-for-sale	44,276	0
Total, Estimated Fair Value, Available-for-sale	373,698	443,331
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]	'	'
Unrealized Losses, Less than 12 Months, Available-for-sale	2,621	6,380
Unrealized Losses,12 Months or Longer, Available-for-sale	550	0
Total, Unrealized Losses, Available-for-sale	3,171	6,380
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Estimated Fair Value, Less than 12 Months, Held-to-maturity	62,569	367,926
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	0	0
Total, Estimated Fair Value, Held-to-maturity	62,569	367,926
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]	'	'
Unrealized Losses, Less than 12 Months, Held-to-maturity	394	5,760
Unrealized Losses, 12 Months or Longer, Held-to-maturity	0	0
Total, Unrealized Losses, Held-to-maturity	394	5,760
Asset-Backed Securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Estimated Fair Value, Less than 12 Months, Available-for-sale	'	102,835
Estimated Fair Value, 12 Months or Longer, Available-for-sale	'	0
Total, Estimated Fair Value, Available-for-sale	'	102,835
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]	'	'
Unrealized Losses, Less than 12 Months, Available-for-sale	'	785
Unrealized Losses,12 Months or Longer, Available-for-sale	'	0
Total, Unrealized Losses, Available-for-sale	'	785
Marketable Equity Securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Estimated Fair Value, Less than 12 Months, Available-for-sale	'	931
Estimated Fair Value, 12 Months or Longer, Available-for-sale	'	0
Total, Estimated Fair Value, Available-for-sale	'	931
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]	'	'
Unrealized Losses, Less than 12 Months, Available-for-sale	'	15
Unrealized Losses,12 Months or Longer, Available-for-sale	'	0
Total, Unrealized Losses, Available-for-sale	'	15
Mortgage-Backed Securities-Residential Issued by Government Sponsored Entities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Estimated Fair Value, Less than 12 Months, Available-for-sale	329,422	339,565
Estimated Fair Value, 12 Months or Longer, Available-for-sale	44,276	0
Total, Estimated Fair Value, Available-for-sale	373,698	339,565
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]	'	'
Unrealized Losses, Less than 12 Months, Available-for-sale	2,621	5,580
Unrealized Losses,12 Months or Longer, Available-for-sale	550	0
Total, Unrealized Losses, Available-for-sale	3,171	5,580
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Estimated Fair Value, Less than 12 Months, Held-to-maturity	48,313	342,333
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	0	0
Total, Estimated Fair Value, Held-to-maturity	48,313	342,333
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]	'	'
Unrealized Losses, Less than 12 Months, Held-to-maturity	362	5,218
Unrealized Losses, 12 Months or Longer, Held-to-maturity	0	0
Total, Unrealized Losses, Held-to-maturity	362	5,218
U.S. Government Agencies	'	'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Estimated Fair Value, Less than 12 Months, Held-to-maturity	14,256	14,571
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	0	0
Total, Estimated Fair Value, Held-to-maturity	14,256	14,571
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]	'	'
Unrealized Losses, Less than 12 Months, Held-to-maturity	32	401
Unrealized Losses, 12 Months or Longer, Held-to-maturity	0	0
Total, Unrealized Losses, Held-to-maturity	32	401
US States and Political Subdivisions | State and Political Subdivisions-Tax Exempt	'	'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Estimated Fair Value, Less than 12 Months, Held-to-maturity	'	10,489
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	'	0
Total, Estimated Fair Value, Held-to-maturity	'	10,489
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]	'	'
Unrealized Losses, Less than 12 Months, Held-to-maturity	'	129
Unrealized Losses, 12 Months or Longer, Held-to-maturity	'	0
Total, Unrealized Losses, Held-to-maturity	0	129
US States and Political Subdivisions | State and Political Subdivisions-Taxable	'	'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Estimated Fair Value, Less than 12 Months, Held-to-maturity	'	533
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	'	0
Total, Estimated Fair Value, Held-to-maturity	'	533
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]	'	'
Unrealized Losses, Less than 12 Months, Held-to-maturity	'	12
Unrealized Losses, 12 Months or Longer, Held-to-maturity	'	0
Total, Unrealized Losses, Held-to-maturity	$0	$12

Investment_Securities_Addition

Investment Securities - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended
	Jan. 07, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
		Security		Security
Investments, Debt and Equity Securities [Abstract]	'	'	'	'	'	'
Trading securities	'	$2,312,000	'	$2,312,000	'	$6,348,000
Proceeds from sales and calls of securities available for sale	'	22,300,000	'	172,600,000	200,000	'
Gross gains realized on sales and calls	'	300,000	'	1,400,000	200,000	'
Gross losses realized on sales and calls	'	'	'	800,000	'	'
Amount transferred from available-for-sale securities to held-to-maturity securities	'	'	511,000,000	0	510,976,000	'
Unrealized loss included in other comprehensive income (loss), net of tax	'	'	9,700,000	'	'	'
Securities in portfolio	'	130	'	130	'	'
Securities in portfolio in an unrealized loss position	'	40	'	40	'	'
Proceeds from sale of collateralized debt obligations	800,000	'	'	'	'	'
Gain on sale of debt investments	300,000	'	'	'	'	'
Investment securities, carrying values	'	$314,100,000	'	$314,100,000	'	$313,500,000

Loans_Major_Classifications_of

Loans - Major Classifications of Loans (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	$4,823,771	$4,552,029
Total Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	1,188,321	1,215,266
Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	797,197	775,733
Total Commercial Real Estate | Other Commercial Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	243,563	300,494
Total Commercial Real Estate | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	71,119	67,688
Total Commercial Real Estate | 1-4 Family Residential Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	76,442	71,351
Total Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	1,988,669	1,864,560
Total Commercial | Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	1,026,853	1,058,148
Total Commercial | Commercial and Industrial Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	959,641	803,736
Total Commercial | Lease Financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	2,175	2,676
Total Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	1,529,274	1,361,214
Total Consumer | 1-4 Family Residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	913,219	804,322
Total Consumer | Home Equity Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	373,604	386,366
Total Consumer | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	242,451	170,526
Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	$117,507	$110,989

Loans_Roll_Forward_of_Accretab

Loans - Roll Forward of Accretable Yield (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accretable Yield	'	'	'	'
Balance at beginning of period	$329,421	$444,481	$383,775	$553,348
Accretion of income	-28,560	-39,625	-92,743	-126,634
Reclassification from nonaccretable difference	12,720	15,018	48,616	46,117
Other	-6,394	-21,459	-32,461	-74,416
Balance at end of period	307,187	398,415	307,187	398,415
Nonaccretable Difference	'	'	'	'
Nonaccretable difference, balance at the end of the period	$210,101	$316,047	$210,101	$316,047

Loans_Summary_of_Companys_Esti

Loans - Summary of Company's Estimate of Cash Flows for Purchased Credit-Impaired Loans (Detail) (USD $)	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Receivables [Abstract]	'	'	'	'	'	'
2014	$26,482	'	'	'	'	'
2015	86,888	'	'	'	'	'
2016	62,361	'	'	'	'	'
2017	42,443	'	'	'	'	'
2018	28,143	'	'	'	'	'
Thereafter	60,870	'	'	'	'	'
Total	$307,187	$329,421	$383,775	$398,415	$444,481	$553,348

Loans_Major_Categories_of_Loan

Loans - Major Categories of Loans (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	$4,602,934	$4,266,672
Covered loans	220,837	285,357
Total Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	1,131,324	1,131,261
Covered loans	56,997	84,005
Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	758,430	719,999
Covered loans	38,767	55,734
Total Commercial Real Estate | Other Commercial Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	230,041	281,332
Covered loans	13,522	19,162
Total Commercial Real Estate | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	66,411	58,579
Covered loans	4,708	9,109
Total Commercial Real Estate | 1-4 Family Residential Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	76,442	71,351
Covered loans	0	0
Total Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	1,924,232	1,787,046
Covered loans	64,437	77,514
Total Commercial | Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	970,230	990,846
Covered loans	56,623	67,302
Total Commercial | Commercial and Industrial Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	951,827	793,524
Covered loans	7,814	10,212
Total Commercial | Lease Financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	2,175	2,676
Covered loans	0	0
Total Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	1,430,719	1,239,198
Covered loans	98,555	122,016
Total Consumer | 1-4 Family Residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	856,337	733,723
Covered loans	56,882	70,599
Total Consumer | Home Equity Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	332,006	335,051
Covered loans	41,598	51,315
Total Consumer | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	242,376	170,424
Covered loans	75	102
Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	116,659	109,167
Covered loans	848	1,822
Non-PCI Loans New	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	2,959,208	2,239,455
Covered loans	0	0
Non-PCI Loans New | Total Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	508,338	356,534
Covered loans	0	0
Non-PCI Loans New | Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	327,458	219,482
Covered loans	0	0
Non-PCI Loans New | Total Commercial Real Estate | Other Commercial Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	88,013	67,537
Covered loans	0	0
Non-PCI Loans New | Total Commercial Real Estate | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	27,439	12,537
Covered loans	0	0
Non-PCI Loans New | Total Commercial Real Estate | 1-4 Family Residential Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	65,428	56,978
Covered loans	0	0
Non-PCI Loans New | Total Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	1,539,156	1,288,514
Covered loans	0	0
Non-PCI Loans New | Total Commercial | Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	700,945	642,794
Covered loans	0	0
Non-PCI Loans New | Total Commercial | Commercial and Industrial Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	836,036	643,044
Covered loans	0	0
Non-PCI Loans New | Total Commercial | Lease Financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	2,175	2,676
Covered loans	0	0
Non-PCI Loans New | Total Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	841,534	537,087
Covered loans	0	0
Non-PCI Loans New | Total Consumer | 1-4 Family Residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	523,598	332,585
Covered loans	0	0
Non-PCI Loans New | Total Consumer | Home Equity Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	87,047	52,918
Covered loans	0	0
Non-PCI Loans New | Total Consumer | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	230,889	151,584
Covered loans	0	0
Non-PCI Loans New | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	70,180	57,320
Covered loans	0	0
Non-PCI Loans Acquired	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	342,905	397,543
Covered loans	33,309	37,487
Non-PCI Loans Acquired | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Covered loans	'	0
Non-PCI Loans Acquired | Total Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	75,156	84,983
Covered loans	0	0
Non-PCI Loans Acquired | Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	61,027	68,080
Covered loans	0	0
Non-PCI Loans Acquired | Total Commercial Real Estate | Other Commercial Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	266	252
Covered loans	0	0
Non-PCI Loans Acquired | Total Commercial Real Estate | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	13,863	16,650
Covered loans	0	0
Non-PCI Loans Acquired | Total Commercial Real Estate | 1-4 Family Residential Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	0	1
Covered loans	0	0
Non-PCI Loans Acquired | Total Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	54,045	68,978
Covered loans	193	356
Non-PCI Loans Acquired | Total Commercial | Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	40,683	48,459
Covered loans	0	0
Non-PCI Loans Acquired | Total Commercial | Commercial and Industrial Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	13,362	20,519
Covered loans	193	356
Non-PCI Loans Acquired | Total Commercial | Lease Financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	0	0
Covered loans	0	0
Non-PCI Loans Acquired | Total Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	210,040	239,623
Covered loans	33,116	37,131
Non-PCI Loans Acquired | Total Consumer | 1-4 Family Residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	45,826	52,078
Covered loans	1,330	1,017
Non-PCI Loans Acquired | Total Consumer | Home Equity Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	159,270	181,138
Covered loans	31,786	36,114
Non-PCI Loans Acquired | Total Consumer | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	4,944	6,407
Covered loans	0	'
Non-PCI Loans Acquired | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	3,664	3,959
Covered loans	0	0
PCI Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	1,300,821	1,629,674
Covered loans	187,528	247,870
PCI Loans | Total Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	547,830	689,744
Covered loans	56,997	84,005
PCI Loans | Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	369,945	432,437
Covered loans	38,767	55,734
PCI Loans | Total Commercial Real Estate | Other Commercial Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	141,762	213,543
Covered loans	13,522	19,162
PCI Loans | Total Commercial Real Estate | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	25,109	29,392
Covered loans	4,708	9,109
PCI Loans | Total Commercial Real Estate | 1-4 Family Residential Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	11,014	14,372
Covered loans	0	0
PCI Loans | Total Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	331,031	429,554
Covered loans	64,244	77,158
PCI Loans | Total Commercial | Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	228,602	299,593
Covered loans	56,623	67,302
PCI Loans | Total Commercial | Commercial and Industrial Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	102,429	129,961
Covered loans	7,621	9,856
PCI Loans | Total Commercial | Lease Financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	0	0
Covered loans	0	0
PCI Loans | Total Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	379,145	462,488
Covered loans	65,439	84,885
PCI Loans | Total Consumer | 1-4 Family Residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	286,913	349,060
Covered loans	55,552	69,582
PCI Loans | Total Consumer | Home Equity Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	85,689	100,995
Covered loans	9,812	15,201
PCI Loans | Total Consumer | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	6,543	12,433
Covered loans	75	102
PCI Loans | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-covered loans	42,815	47,888
Covered loans	$848	$1,822

Loans_Aging_of_the_Recorded_In

Loans - Aging of the Recorded Investment in Past Due Loans, Based on Contractual Terms (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	$4,764,998	$4,487,166
Non-PCI Loans Acquired	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	15,762	15,991
Non-PCI Loans Acquired | Total Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	963	959
Non-PCI Loans Acquired | Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	517	90
Non-PCI Loans Acquired | Total Commercial Real Estate | Other Commercial Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	278	563
Non-PCI Loans Acquired | Total Commercial Real Estate | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	0	305
Non-PCI Loans Acquired | Total Commercial Real Estate | 1-4 Family Residential Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	168	1
Non-PCI Loans Acquired | Total Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	7,304	5,361
Non-PCI Loans Acquired | Total Commercial | Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	3,978	3,414
Non-PCI Loans Acquired | Total Commercial | Commercial and Industrial Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	3,326	1,947
Non-PCI Loans Acquired | Total Commercial | Lease Financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	0	0
Non-PCI Loans Acquired | Total Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	7,485	9,671
Non-PCI Loans Acquired | Total Consumer | 1-4 Family Residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	789	2,279
Non-PCI Loans Acquired | Total Consumer | Home Equity Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	3,377	4,786
Non-PCI Loans Acquired | Total Consumer | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	3,319	2,606
Non-PCI Loans Acquired | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	10	'
PCI Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	170,361	271,123
PCI Loans | Total Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	72,929	120,450
PCI Loans | Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	31,574	47,791
PCI Loans | Total Commercial Real Estate | Other Commercial Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	38,045	68,217
PCI Loans | Total Commercial Real Estate | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	2,098	2,641
PCI Loans | Total Commercial Real Estate | 1-4 Family Residential Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	1,212	1,801
PCI Loans | Total Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	47,722	77,156
PCI Loans | Total Commercial | Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	21,997	45,491
PCI Loans | Total Commercial | Commercial and Industrial Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	25,725	31,665
PCI Loans | Total Commercial | Lease Financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	0	0
PCI Loans | Total Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	46,936	67,385
PCI Loans | Total Consumer | 1-4 Family Residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	39,158	55,393
PCI Loans | Total Consumer | Home Equity Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	7,373	10,332
PCI Loans | Total Consumer | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	405	1,660
PCI Loans | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	2,774	6,132
Non-Covered Loans | Non-PCI Loans Acquired	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	4,886	4,035
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	9,667	10,474
Non-Covered Loans | Non-PCI Loans Acquired | Total Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	23	305
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	940	654
Non-Covered Loans | Non-PCI Loans Acquired | Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	517	90
Non-Covered Loans | Non-PCI Loans Acquired | Total Commercial Real Estate | Other Commercial Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	23	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	255	563
Non-Covered Loans | Non-PCI Loans Acquired | Total Commercial Real Estate | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	305
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Non-Covered Loans | Non-PCI Loans Acquired | Total Commercial Real Estate | 1-4 Family Residential Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	168	1
Non-Covered Loans | Non-PCI Loans Acquired | Total Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	1,479	22
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	5,759	5,273
Non-Covered Loans | Non-PCI Loans Acquired | Total Commercial | Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	1,373	20
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	2,605	3,394
Non-Covered Loans | Non-PCI Loans Acquired | Total Commercial | Commercial and Industrial Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	106	2
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	3,154	1,879
Non-Covered Loans | Non-PCI Loans Acquired | Total Commercial | Lease Financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Non-Covered Loans | Non-PCI Loans Acquired | Total Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	3,384	3,708
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	2,958	4,547
Non-Covered Loans | Non-PCI Loans Acquired | Total Consumer | 1-4 Family Residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	190	862
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	527	1,417
Non-Covered Loans | Non-PCI Loans Acquired | Total Consumer | Home Equity Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	615	1,046
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	1,691	2,324
Non-Covered Loans | Non-PCI Loans Acquired | Total Consumer | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	2,579	1,800
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	740	806
Non-Covered Loans | Non-PCI Loans Acquired | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	'
Greater than 90 Days Past Due and Still Accruing/Accreting	0	'
Nonaccrual	10	'
Non-Covered Loans | PCI Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	7,666	16,654
Greater than 90 Days Past Due and Still Accruing/Accreting	138,285	213,379
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	'
Non-Covered Loans | PCI Loans | Total Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	889	2,573
Greater than 90 Days Past Due and Still Accruing/Accreting	60,658	98,633
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	699	1,463
Greater than 90 Days Past Due and Still Accruing/Accreting	26,491	35,563
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Commercial Real Estate | Other Commercial Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	190	1,105
Greater than 90 Days Past Due and Still Accruing/Accreting	30,857	58,633
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Commercial Real Estate | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	0
Greater than 90 Days Past Due and Still Accruing/Accreting	2,098	2,641
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Commercial Real Estate | 1-4 Family Residential Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	5
Greater than 90 Days Past Due and Still Accruing/Accreting	1,212	1,796
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	1,888	4,875
Greater than 90 Days Past Due and Still Accruing/Accreting	42,215	63,793
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Commercial | Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	1,138	4,626
Greater than 90 Days Past Due and Still Accruing/Accreting	17,607	33,974
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Commercial | Commercial and Industrial Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	750	249
Greater than 90 Days Past Due and Still Accruing/Accreting	24,608	29,819
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Commercial | Lease Financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	4,808	8,773
Greater than 90 Days Past Due and Still Accruing/Accreting	32,719	46,208
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Consumer | 1-4 Family Residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	3,444	6,696
Greater than 90 Days Past Due and Still Accruing/Accreting	27,803	37,646
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Consumer | Home Equity Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	1,162	1,733
Greater than 90 Days Past Due and Still Accruing/Accreting	4,740	7,313
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Total Consumer | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	202	344
Greater than 90 Days Past Due and Still Accruing/Accreting	176	1,249
Nonaccrual	0	0
Non-Covered Loans | PCI Loans | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	81	433
Greater than 90 Days Past Due and Still Accruing/Accreting	2,693	4,745
Nonaccrual	0	0
Covered Loans | Non-PCI Loans Acquired	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	286	146
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	923	1,336
Covered Loans | Non-PCI Loans Acquired | Total Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Covered Loans | Non-PCI Loans Acquired | Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Covered Loans | Non-PCI Loans Acquired | Total Commercial Real Estate | Other Commercial Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Covered Loans | Non-PCI Loans Acquired | Total Commercial Real Estate | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Covered Loans | Non-PCI Loans Acquired | Total Commercial Real Estate | 1-4 Family Residential Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Covered Loans | Non-PCI Loans Acquired | Total Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	66	66
Covered Loans | Non-PCI Loans Acquired | Total Commercial | Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Covered Loans | Non-PCI Loans Acquired | Total Commercial | Commercial and Industrial Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	66	66
Covered Loans | Non-PCI Loans Acquired | Total Commercial | Lease Financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Covered Loans | Non-PCI Loans Acquired | Total Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	286	146
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	857	1,270
Covered Loans | Non-PCI Loans Acquired | Total Consumer | 1-4 Family Residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	45	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	27	0
Covered Loans | Non-PCI Loans Acquired | Total Consumer | Home Equity Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	241	146
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	830	1,270
Covered Loans | Non-PCI Loans Acquired | Total Consumer | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Covered Loans | Non-PCI Loans Acquired | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	'
Greater than 90 Days Past Due and Still Accruing/Accreting	0	'
Nonaccrual	0	'
Covered Loans | PCI Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	1,025	653
Greater than 90 Days Past Due and Still Accruing/Accreting	23,385	40,437
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	277	107
Greater than 90 Days Past Due and Still Accruing/Accreting	11,105	19,137
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	262	107
Greater than 90 Days Past Due and Still Accruing/Accreting	4,122	10,658
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Commercial Real Estate | Other Commercial Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	15	0
Greater than 90 Days Past Due and Still Accruing/Accreting	6,983	8,479
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Commercial Real Estate | Multifamily Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Commercial Real Estate | 1-4 Family Residential Construction and Land	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	453	260
Greater than 90 Days Past Due and Still Accruing/Accreting	3,166	8,228
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Commercial | Owner Occupied Commercial Real Estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	214	260
Greater than 90 Days Past Due and Still Accruing/Accreting	3,038	6,631
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Commercial | Commercial and Industrial Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	239	0
Greater than 90 Days Past Due and Still Accruing/Accreting	128	1,597
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Commercial | Lease Financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	0
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	295	286
Greater than 90 Days Past Due and Still Accruing/Accreting	9,114	12,118
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Consumer | 1-4 Family Residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	220	227
Greater than 90 Days Past Due and Still Accruing/Accreting	7,691	10,824
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Consumer | Home Equity Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	75	59
Greater than 90 Days Past Due and Still Accruing/Accreting	1,396	1,227
Nonaccrual	0	0
Covered Loans | PCI Loans | Total Consumer | Other Consumer Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	27	67
Nonaccrual	0	0
Covered Loans | PCI Loans | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	0	0
Greater than 90 Days Past Due and Still Accruing/Accreting	0	954
Nonaccrual	$0	$0

Loans_Loans_Excluding_Purchase

Loans - Loans, Excluding Purchased Credit-Impaired Loans by Internal Ratings (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	$3,335,422	$2,674,485
Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	3,300,233	2,636,923
Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	6,709	7,915
Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	17,890	17,838
Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	10,590	11,809
Doubtful	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	0
Total Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	583,494	441,517
Total Commercial Real Estate | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	577,818	435,203
Total Commercial Real Estate | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	1,653	2,574
Total Commercial Real Estate | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	3,083	3,086
Total Commercial Real Estate | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	940	654
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	388,485	287,562
Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	386,116	285,919
Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	963	568
Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	889	985
Total Commercial Real Estate | Non-Owner Occupied Commercial Real Estate | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	517	90
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	88,279	67,789
Total Commercial Real Estate | Other Commercial Construction and Land | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	87,412	67,178
Total Commercial Real Estate | Other Commercial Construction and Land | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	612	48
Total Commercial Real Estate | Other Commercial Construction and Land | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	0
Total Commercial Real Estate | Other Commercial Construction and Land | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	255	563
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	41,302	29,187
Total Commercial Real Estate | Multifamily Commercial Real Estate | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	41,302	28,882
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/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	305
Total Commercial Real Estate | Multifamily Commercial Real Estate | Substandard Nonaccrual	'	'
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	65,428	56,979
Total Commercial Real Estate | 1-4 Family Residential Construction and Land | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	62,988	53,224
Total Commercial Real Estate | 1-4 Family Residential Construction and Land | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	78	1,958
Total Commercial Real Estate | 1-4 Family Residential Construction and Land | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,194	1,796
Total Commercial Real Estate | 1-4 Family Residential Construction and Land | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	168	1
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	1,593,394	1,357,848
Total Commercial | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	1,570,468	1,335,832
Total Commercial | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	4,905	5,276
Total Commercial | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	12,196	11,401
Total Commercial | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	5,825	5,339
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	741,628	691,253
Total Commercial | Owner Occupied Commercial Real Estate | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	726,576	681,571
Total Commercial | Owner Occupied Commercial Real Estate | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	4,671	4,093
Total Commercial | Owner Occupied Commercial Real Estate | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	7,777	2,195
Total Commercial | Owner Occupied Commercial Real Estate | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,604	3,394
Total Commercial | Owner Occupied Commercial Real Estate | Doubtful	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	0
Total Commercial | Commercial and Industrial Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	849,591	663,919
Total Commercial | Commercial and Industrial Loans | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	841,717	651,585
Total Commercial | Commercial and Industrial Loans | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	234	1,183
Total Commercial | Commercial and Industrial Loans | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	4,419	9,206
Total Commercial | Commercial and Industrial Loans | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	3,221	1,945
Total Commercial | Commercial and Industrial Loans | Doubtful	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	0
Total Commercial | Lease Financing	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,175	2,676
Total Commercial | Lease Financing | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,175	2,676
Total Commercial | Lease Financing | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	0
Total Commercial | Lease Financing | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	0
Total Commercial | Lease Financing | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	0
Total Commercial | Lease Financing | Doubtful	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	0
Total Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	1,084,690	813,841
Total Consumer | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	1,078,363	804,882
Total Consumer | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	151	65
Total Consumer | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,361	3,078
Total Consumer | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	3,815	5,816
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	570,754	385,680
Total Consumer | 1-4 Family Residential | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	569,955	384,235
Total Consumer | 1-4 Family Residential | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	151	28
Total Consumer | 1-4 Family Residential | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	94	0
Total Consumer | 1-4 Family Residential | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	554	1,417
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	278,103	270,170
Total Consumer | Home Equity Loans | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	273,315	263,490
Total Consumer | Home Equity Loans | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	37
Total Consumer | Home Equity Loans | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,267	3,050
Total Consumer | Home Equity Loans | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,521	3,593
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	235,833	157,991
Total Consumer | Other Consumer Loans | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	235,093	157,157
Total Consumer | Other Consumer Loans | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	0
Total Consumer | Other Consumer Loans | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	28
Total Consumer | Other Consumer Loans | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	740	806
Total Consumer | Other Consumer Loans | Doubtful	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	0
Other	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	73,844	61,279
Other | Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	73,584	61,006
Other | Special Mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	0	0
Other | Substandard Accruing/Accreting	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	250	273
Other | Substandard Nonaccrual	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	10	0
Other | Doubtful	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	$0	$0

Loans_Additional_Information_D

Loans - Additional Information (Detail) (USD $)

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Total Commercial

Total Commercial

Total Commercial

Other

Other

Other

Other

Other

Other

Other

Other

Minimum

Farm Land

Farm Land

State and Political Subdivision Obligations

State and Political Subdivision Obligations

Deposit Customer Overdraft

Deposit Customer Overdraft

Accounts, Notes, Loans and Financing Receivable [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Loans held for sale

$6,439,000

$8,012,000

'

'

'

'

'

'

'

'

'

'

'

Deferred loan origination costs

9,200,000

3,800,000

'

'

'

'

'

'

'

'

'

'

'

Total loans

4,823,771,000

4,552,029,000

1,988,669,000

1,864,560,000

'

117,507,000

110,989,000

46,500,000

49,700,000

47,300,000

36,200,000

2,100,000

2,200,000

Analysis of loans individually by classification of credit risk

'

'

'

'

$500,000

'

'

'

'

'

'

'

'

Analysis of loans individually by classification of credit risk

'

'

'

'

'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 loans not rated Pass.

'

'

'

'

'

'

'

'

Allowance_for_Loan_Losses_Allo

Allowance for Loan Losses - Allowance for Loan Losses (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	$55,307	$56,832	$56,851	$57,262
Reversal of provision for loan losses on PCI loans	-1,332	984	48	10,853
Non-PCI loans charged-off	-2,306	-1,945	-6,438	-15,335
Recoveries of loans previously charged off	665	522	1,873	3,613
Balance, end of period	52,334	56,393	52,334	56,393
PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	34,472	39,192	37,900	39,823
Reversal of provision for loan losses on PCI loans	-4,205	-72	-7,633	-703
Non-PCI loans charged-off	0	0	0	0
Recoveries of loans previously charged off	0	0	0	0
Balance, end of period	30,267	39,120	30,267	39,120
Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	20,835	17,640	18,951	17,439
Reversal of provision for loan losses on PCI loans	2,873	1,056	7,681	11,556
Non-PCI loans charged-off	-2,306	-1,945	-6,438	-15,335
Recoveries of loans previously charged off	665	522	1,873	3,613
Balance, end of period	$22,067	$17,273	$22,067	$17,273

Allowance_for_Loan_Losses_Roll

Allowance for Loan Losses - Roll Forward of the Allowance for Loan Losses (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	$55,307	$56,832	$56,851	$57,262
Provision / (Reversals)	-1,332	984	48	10,853
Net (Charge-offs)/ Recoveries	-1,641	-1,423	-4,565	-11,722
Balance, end of period	52,334	56,393	52,334	56,393
Total Commercial Real Estate	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	18,100	18,703	14,730	18,539
Provision / (Reversals)	-774	1,540	2,903	1,149
Net (Charge-offs)/ Recoveries	128	98	-179	653
Balance, end of period	17,454	20,341	17,454	20,341
Total Commercial	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	11,963	12,984	12,763	11,545
Provision / (Reversals)	-543	96	-1,228	9,620
Net (Charge-offs)/ Recoveries	-187	-449	-302	-8,534
Balance, end of period	11,233	12,631	11,233	12,631
Total Consumer	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	24,859	23,870	28,275	26,492
Provision / (Reversals)	-377	-346	-1,945	-992
Net (Charge-offs)/ Recoveries	-1,158	-634	-3,006	-2,610
Balance, end of period	23,324	22,890	23,324	22,890
Other	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	385	1,275	1,083	686
Provision / (Reversals)	362	-306	318	1,076
Net (Charge-offs)/ Recoveries	-424	-438	-1,078	-1,231
Balance, end of period	323	531	323	531
Non-Owner Occupied Commercial Real Estate | Total Commercial Real Estate	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	4,487	4,329	4,635	3,764
Provision / (Reversals)	-1,772	2,344	-1,806	2,936
Net (Charge-offs)/ Recoveries	119	11	5	-16
Balance, end of period	2,834	6,684	2,834	6,684
Other Commercial Construction and Land | Total Commercial Real Estate	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	11,502	12,310	8,217	12,711
Provision / (Reversals)	1,401	-1,201	4,881	-2,120
Net (Charge-offs)/ Recoveries	11	85	-184	603
Balance, end of period	12,914	11,194	12,914	11,194
Multifamily Commercial Real Estate | Total Commercial Real Estate	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	480	258	320	348
Provision / (Reversals)	-17	44	143	-87
Net (Charge-offs)/ Recoveries	0	0	0	41
Balance, end of period	463	302	463	302
1-4 Family Residential Construction and Land | Total Commercial Real Estate	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	1,631	1,806	1,558	1,716
Provision / (Reversals)	-386	353	-315	420
Net (Charge-offs)/ Recoveries	-2	2	0	25
Balance, end of period	1,243	2,161	1,243	2,161
Owner Occupied Commercial Real Estate | Total Commercial	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	3,317	4,696	4,450	4,055
Provision / (Reversals)	-430	357	-1,443	732
Net (Charge-offs)/ Recoveries	-10	17	-130	283
Balance, end of period	2,877	5,070	2,877	5,070
Commercial and Industrial Loans | Total Commercial	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	8,645	8,288	8,310	7,490
Provision / (Reversals)	-113	-264	217	8,885
Net (Charge-offs)/ Recoveries	-177	-466	-172	-8,817
Balance, end of period	8,355	7,558	8,355	7,558
Lease Financing | Total Commercial	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	1	0	3	0
Provision / (Reversals)	0	3	-2	3
Net (Charge-offs)/ Recoveries	0	0	0	0
Balance, end of period	1	3	1	3
1-4 Family Residential | Total Consumer	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	17,138	17,572	21,724	15,740
Provision / (Reversals)	-1,250	-1,040	-5,742	772
Net (Charge-offs)/ Recoveries	-8	51	-102	71
Balance, end of period	15,880	16,583	15,880	16,583
Home Equity Loans | Total Consumer	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	4,290	3,937	3,869	8,670
Provision / (Reversals)	-371	-40	530	-3,861
Net (Charge-offs)/ Recoveries	-299	-120	-779	-1,032
Balance, end of period	3,620	3,777	3,620	3,777
Other Consumer Loans | Total Consumer	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	3,431	2,361	2,682	2,082
Provision / (Reversals)	1,244	734	3,267	2,097
Net (Charge-offs)/ Recoveries	-851	-565	-2,125	-1,649
Balance, end of period	$3,824	$2,530	$3,824	$2,530

Allowance_for_Loan_Losses_Roll1

Allowance for Loan Losses - Roll Forward of the Allowance for Loan Losses at the PCI and Non-PCI Levels (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	$55,307	$56,832	$56,851	$57,262
Total charge-offs	-2,306	-1,945	-6,438	-15,335
Total recoveries	665	522	1,873	3,613
Net charge-offs	-1,641	-1,423	-4,565	-11,722
Total provision for loan losses	-1,332	984	48	10,853
Balance, end of period	52,334	56,393	52,334	56,393
Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	20,835	17,640	18,951	17,439
Total charge-offs	-2,306	-1,945	-6,438	-15,335
Total recoveries	665	522	1,873	3,613
Net charge-offs	-1,641	-1,423	-4,565	-11,722
Total provision for loan losses	2,873	1,056	7,681	11,556
Balance, end of period	22,067	17,273	22,067	17,273
PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	34,472	39,192	37,900	39,823
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Net charge-offs	0	0	0	0
Total provision for loan losses	-4,205	-72	-7,633	-703
Balance, end of period	30,267	39,120	30,267	39,120
Total Commercial Real Estate	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	18,100	18,703	14,730	18,539
Total charge-offs	-92	-50	-505	-244
Total recoveries	220	148	326	897
Total provision for loan losses	-774	1,540	2,903	1,149
Balance, end of period	17,454	20,341	17,454	20,341
Total Commercial Real Estate | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	-92	-50	-505	-244
Total recoveries	220	148	326	897
Total provision for loan losses	370	-64	956	-730
Total Commercial Real Estate | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	-1,144	1,604	1,947	1,879
Total Commercial	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	11,963	12,984	12,763	11,545
Total charge-offs	-295	-544	-600	-9,555
Total recoveries	0	0	298	1,021
Total provision for loan losses	-543	96	-1,228	9,620
Balance, end of period	11,233	12,631	11,233	12,631
Total Commercial | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	-295	-544	-600	-9,555
Total recoveries	0	0	298	1,021
Total provision for loan losses	37	-49	456	7,575
Total Commercial | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	-580	145	-1,684	2,045
Total Consumer	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	24,859	23,870	28,275	26,492
Total charge-offs	-1,334	-697	-3,617	-3,473
Total recoveries	176	63	611	863
Total provision for loan losses	-377	-346	-1,945	-992
Balance, end of period	23,324	22,890	23,324	22,890
Total Consumer | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	-1,334	-697	-3,617	-3,473
Total recoveries	176	63	611	863
Total provision for loan losses	2,023	792	5,281	3,480
Total Consumer | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	-2,400	-1,138	-7,226	-4,472
Other	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	385	1,275	1,083	686
Total charge-offs	-585	-654	-1,716	-2,063
Total recoveries	161	216	638	832
Total provision for loan losses	362	-306	318	1,076
Balance, end of period	323	531	323	531
Other | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	-585	-654	-1,716	-2,063
Total recoveries	161	216	638	832
Total provision for loan losses	443	377	988	1,231
Other | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	-81	-683	-670	-155
Non-Owner Occupied Commercial Real Estate | Total Commercial Real Estate	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	4,487	4,329	4,635	3,764
Total charge-offs	-88	0	-292	-92
Total recoveries	207	11	297	76
Total provision for loan losses	-1,772	2,344	-1,806	2,936
Balance, end of period	2,834	6,684	2,834	6,684
Non-Owner Occupied Commercial Real Estate | Total Commercial Real Estate | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	-88	0	-292	-92
Total recoveries	207	11	297	76
Total provision for loan losses	-76	153	105	-46
Non-Owner Occupied Commercial Real Estate | Total Commercial Real Estate | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	-1,696	2,191	-1,911	2,982
Other Commercial Construction and Land | Total Commercial Real Estate	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	11,502	12,310	8,217	12,711
Total charge-offs	0	-50	-207	-152
Total recoveries	11	135	23	755
Total provision for loan losses	1,401	-1,201	4,881	-2,120
Balance, end of period	12,914	11,194	12,914	11,194
Other Commercial Construction and Land | Total Commercial Real Estate | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	-50	-207	-152
Total recoveries	11	135	23	755
Total provision for loan losses	493	-242	992	-769
Other Commercial Construction and Land | Total Commercial Real Estate | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	908	-959	3,889	-1,351
Multifamily Commercial Real Estate | Total Commercial Real Estate	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	480	258	320	348
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	41
Total provision for loan losses	-17	44	143	-87
Balance, end of period	463	302	463	302
Multifamily Commercial Real Estate | Total Commercial Real Estate | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	41
Total provision for loan losses	23	-13	-1	-60
Multifamily Commercial Real Estate | Total Commercial Real Estate | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	-40	57	144	-27
1-4 Family Residential Construction and Land | Total Commercial Real Estate	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	1,631	1,806	1,558	1,716
Total charge-offs	-4	0	-6	0
Total recoveries	2	2	6	25
Total provision for loan losses	-386	353	-315	420
Balance, end of period	1,243	2,161	1,243	2,161
1-4 Family Residential Construction and Land | Total Commercial Real Estate | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	-4	0	-6	0
Total recoveries	2	2	6	25
Total provision for loan losses	-70	38	-140	145
1-4 Family Residential Construction and Land | Total Commercial Real Estate | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	-316	315	-175	275
Owner Occupied Commercial Real Estate | Total Commercial	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	3,317	4,696	4,450	4,055
Total charge-offs	-12	0	-156	0
Total recoveries	2	17	26	283
Total provision for loan losses	-430	357	-1,443	732
Balance, end of period	2,877	5,070	2,877	5,070
Owner Occupied Commercial Real Estate | Total Commercial | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	-12	0	-156	0
Total recoveries	2	17	26	283
Total provision for loan losses	-29	-99	10	-654
Owner Occupied Commercial Real Estate | Total Commercial | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	-401	456	-1,453	1,386
Commercial and Industrial Loans | Total Commercial	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	8,645	8,288	8,310	7,490
Total charge-offs	-283	-544	-444	-9,555
Total recoveries	106	78	272	738
Total provision for loan losses	-113	-264	217	8,885
Balance, end of period	8,355	7,558	8,355	7,558
Commercial and Industrial Loans | Total Commercial | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	-283	-544	-444	-9,555
Total recoveries	106	78	272	738
Total provision for loan losses	66	47	448	8,226
Commercial and Industrial Loans | Total Commercial | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	-179	-311	-231	659
Lease Financing | Total Commercial	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	1	0	3	0
Total charge-offs	0	0	0	0
Total recoveries	'	'	0	0
Total provision for loan losses	0	3	-2	3
Balance, end of period	1	3	1	3
Lease Financing | Total Commercial | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	'	'	0	0
Total provision for loan losses	0	3	-2	3
Lease Financing | Total Commercial | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	'	'	0	0
Total provision for loan losses	0	0	0	0
1-4 Family Residential | Total Commercial	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total recoveries	108	95	'	'
1-4 Family Residential | Total Commercial | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total recoveries	108	95	'	'
1-4 Family Residential | Total Commercial | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total recoveries	0	0	'	'
1-4 Family Residential | Total Consumer	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	17,138	17,572	21,724	15,740
Total charge-offs	-13	-9	-114	-37
Total recoveries	5	60	12	108
Total provision for loan losses	-1,250	-1,040	-5,742	772
Balance, end of period	15,880	16,583	15,880	16,583
1-4 Family Residential | Total Consumer | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	-13	-9	-114	-37
Total recoveries	5	60	12	108
Total provision for loan losses	395	87	952	232
1-4 Family Residential | Total Consumer | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	-1,645	-1,127	-6,694	540
Home Equity Loans | Total Consumer	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	4,290	3,937	3,869	8,670
Total charge-offs	-337	-3	-931	-1,370
Total recoveries	38	-117	152	338
Total provision for loan losses	-371	-40	530	-3,861
Balance, end of period	3,620	3,777	3,620	3,777
Home Equity Loans | Total Consumer | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	-337	-3	-931	-1,370
Total recoveries	38	-117	152	338
Total provision for loan losses	389	-6	1,003	1,014
Home Equity Loans | Total Consumer | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	-760	-34	-473	-4,875
Other Consumer Loans | Total Consumer	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance, beginning of period	3,431	2,361	2,682	2,082
Total charge-offs	-984	-685	-2,572	-2,066
Total recoveries	133	120	447	417
Total provision for loan losses	1,244	734	3,267	2,097
Balance, end of period	3,824	2,530	3,824	2,530
Other Consumer Loans | Total Consumer | Non-PCI Loans Acquired	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	-984	-685	-2,572	-2,066
Total recoveries	133	120	447	417
Total provision for loan losses	1,239	711	3,326	2,234
Other Consumer Loans | Total Consumer | PCI Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Total charge-offs	0	0	0	0
Total recoveries	0	0	0	0
Total provision for loan losses	$5	$23	($59)	($137)

Allowance_for_Loan_Losses_Summ

Allowance for Loan Losses - Summary of Allowance for Loan Losses and Recorded Investment in Loans by Class of Loans and by Impairment Evaluation (Detail) (USD $)	Sep. 30, 2014		Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Loans collectively evaluated for impairment, unamortized purchase discounts (Premium)	$13,100,000		$14,700,000
Acquired Loans	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Loans, Collectively Evaluated for Impairment	375,500,000		435,000,000
Non-PCI Loans Acquired	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	34,000		512,000
Allowance for Loan Losses, Collectively Evaluated for Impairment	22,033,000		18,439,000
Allowance for Loan Losses, Purchased Credit-Impaired	30,267,000		37,900,000
Loans, Individually Evaluated for Impairment	10,031,000		15,824,000
Loans, Collectively Evaluated for Impairment	3,318,952,000	[1]	2,650,649,000	[2]
Loans, Purchased Credit-Impaired	1,488,349,000		1,877,544,000
Non-PCI Loans Acquired | Total Commercial Real Estate	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	4,774,000		3,997,000
Allowance for Loan Losses, Purchased Credit-Impaired	12,680,000		10,733,000
Loans, Individually Evaluated for Impairment	0		877,000
Loans, Collectively Evaluated for Impairment	583,494,000	[1]	440,640,000	[2]
Loans, Purchased Credit-Impaired	604,827,000		773,749,000
Non-PCI Loans Acquired | Total Commercial	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	0		507,000
Allowance for Loan Losses, Collectively Evaluated for Impairment	9,645,000		8,984,000
Allowance for Loan Losses, Purchased Credit-Impaired	1,588,000		3,272,000
Loans, Individually Evaluated for Impairment	9,598,000		14,467,000
Loans, Collectively Evaluated for Impairment	1,583,796,000	[1]	1,343,381,000	[2]
Loans, Purchased Credit-Impaired	395,275,000		506,712,000
Non-PCI Loans Acquired | Total Consumer	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	34,000		5,000
Allowance for Loan Losses, Collectively Evaluated for Impairment	7,236,000		4,990,000
Allowance for Loan Losses, Purchased Credit-Impaired	16,054,000		23,280,000
Loans, Individually Evaluated for Impairment	433,000		207,000
Loans, Collectively Evaluated for Impairment	1,077,818,000	[1]	805,622,000	[2]
Loans, Purchased Credit-Impaired	444,584,000		547,373,000
Non-PCI Loans Acquired | Other	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	378,000		468,000
Allowance for Loan Losses, Purchased Credit-Impaired	-55,000		615,000
Loans, Individually Evaluated for Impairment	0		273,000
Loans, Collectively Evaluated for Impairment	73,844,000	[1]	61,006,000	[2]
Loans, Purchased Credit-Impaired	43,663,000		49,710,000
Non-PCI Loans Acquired | Non-Owner Occupied Commercial Real Estate | Total Commercial Real Estate	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,725,000		1,615,000
Allowance for Loan Losses, Purchased Credit-Impaired	1,109,000		3,020,000
Loans, Individually Evaluated for Impairment	0		877,000
Loans, Collectively Evaluated for Impairment	388,485,000	[1]	286,685,000	[2]
Loans, Purchased Credit-Impaired	408,712,000		488,171,000
Non-PCI Loans Acquired | Other Commercial Construction and Land | Total Commercial Real Estate	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	2,009,000		1,201,000
Allowance for Loan Losses, Purchased Credit-Impaired	10,905,000		7,016,000
Loans, Individually Evaluated for Impairment	0		0
Loans, Collectively Evaluated for Impairment	88,279,000	[1]	67,789,000	[2]
Loans, Purchased Credit-Impaired	155,284,000		232,705,000
Non-PCI Loans Acquired | Multifamily Commercial Real Estate | Total Commercial Real Estate	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	115,000		116,000
Allowance for Loan Losses, Purchased Credit-Impaired	348,000		204,000
Loans, Individually Evaluated for Impairment	0		0
Loans, Collectively Evaluated for Impairment	41,302,000	[1]	29,187,000	[2]
Loans, Purchased Credit-Impaired	29,817,000		38,501,000
Non-PCI Loans Acquired | 1-4 Family Residential Construction and Land | Total Commercial Real Estate	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	925,000		1,065,000
Allowance for Loan Losses, Purchased Credit-Impaired	318,000		493,000
Loans, Individually Evaluated for Impairment	0		0
Loans, Collectively Evaluated for Impairment	65,428,000	[1]	56,979,000	[2]
Loans, Purchased Credit-Impaired	11,014,000		14,372,000
Non-PCI Loans Acquired | Owner Occupied Commercial Real Estate | Total Commercial	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	2,491,000		2,611,000
Allowance for Loan Losses, Purchased Credit-Impaired	386,000		1,839,000
Loans, Individually Evaluated for Impairment	3,503,000		4,844,000
Loans, Collectively Evaluated for Impairment	738,125,000	[1]	686,409,000	[2]
Loans, Purchased Credit-Impaired	285,225,000		366,895,000
Non-PCI Loans Acquired | Commercial and Industrial Loans | Total Commercial	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	0		507,000
Allowance for Loan Losses, Collectively Evaluated for Impairment	7,153,000		6,370,000
Allowance for Loan Losses, Purchased Credit-Impaired	1,202,000		1,433,000
Loans, Individually Evaluated for Impairment	6,095,000		9,623,000
Loans, Collectively Evaluated for Impairment	843,496,000	[1]	654,296,000	[2]
Loans, Purchased Credit-Impaired	110,050,000		139,817,000
Non-PCI Loans Acquired | Lease Financing | Total Commercial	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,000		3,000
Allowance for Loan Losses, Purchased Credit-Impaired	0		0
Loans, Individually Evaluated for Impairment	0		0
Loans, Collectively Evaluated for Impairment	2,175,000	[1]	2,676,000	[2]
Loans, Purchased Credit-Impaired	0		0
Non-PCI Loans Acquired | 1-4 Family Residential | Total Consumer	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	3,129,000		2,279,000
Allowance for Loan Losses, Purchased Credit-Impaired	12,751,000		19,445,000
Loans, Individually Evaluated for Impairment	0		0
Loans, Collectively Evaluated for Impairment	564,315,000	[1]	377,668,000	[2]
Loans, Purchased Credit-Impaired	342,465,000		418,642,000
Non-PCI Loans Acquired | Home Equity Loans | Total Consumer	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	26,000		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	596,000		398,000
Allowance for Loan Losses, Purchased Credit-Impaired	2,998,000		3,471,000
Loans, Individually Evaluated for Impairment	304,000		0
Loans, Collectively Evaluated for Impairment	277,799,000	[1]	270,170,000	[2]
Loans, Purchased Credit-Impaired	95,501,000		116,196,000
Non-PCI Loans Acquired | Other Consumer Loans | Total Consumer	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Allowance for Loan Losses, Individually Evaluated for Impairment	8,000		5,000
Allowance for Loan Losses, Collectively Evaluated for Impairment	3,511,000		2,313,000
Allowance for Loan Losses, Purchased Credit-Impaired	305,000		364,000
Loans, Individually Evaluated for Impairment	129,000		207,000
Loans, Collectively Evaluated for Impairment	235,704,000	[1]	157,784,000	[2]
Loans, Purchased Credit-Impaired	$6,618,000		$12,535,000
[1]	Loans collectively evaluated for impairment include $375.5 million of acquired loans which are presented net of unamortized purchase discounts of $13.1 million.
[2]	Loans collectively evaluated for impairment include $435.0 million of acquired loans which are presented net of unamortized purchase discounts of $14.7 million.

Allowance_for_Loan_Losses_Addi

Allowance for Loan Losses - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Receivables [Abstract]	'	'	'	'
Loans modified in TDRs with recorded investments	$1.20	$1.20	$3.70	$1.40

FDIC_Indemnification_Asset_Sch

FDIC Indemnification Asset - Schedule of FDIC Indemnification Asset (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
FDIC Indemnification Asset [Roll Forward]	'	'
FDIC indemnification asset, beginning balance	$33,610	$49,417
Indemnification asset income	-977	2,003
Amortization of indemnification asset	-7,133	-5,782
Cash received on reimbursable losses	-4,475	-8,801
FDIC indemnification asset, ending balance	$21,025	$36,837

FDIC_Indemnification_Asset_Add

FDIC Indemnification Asset - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014
FDIC Indemnification Asset [Line Items]	'
Percentage future credit losses and workout expenses to be absorbed by FDIC	80.00%
Single Family Loans	'
FDIC Indemnification Asset [Line Items]	'
Number of FDIC loss sharing agreements	3
Period covered by loss sharing agreement	'10 years
Commercial And Other Loans	'
FDIC Indemnification Asset [Line Items]	'
Number of FDIC loss sharing agreements	3
Period covered by loss sharing agreement	'5 years
Other Covered Assets	'
FDIC Indemnification Asset [Line Items]	'
Period covered by loss sharing agreement	'8 years

Other_Real_Estate_Owned_Other_

Other Real Estate Owned - Other Real Estate Owned (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other Real Estate [Roll Forward]	'	'	'	'
Balance, beginning of period	$96,283	$142,793	$129,396	$154,093
Real estate acquired from borrowers	12,590	10,585	30,452	53,366
Valuation allowance	-2,752	-6,045	-9,347	-18,844
Properties sold and other	-15,844	-17,679	-60,224	-58,961
Balance, end of period	$90,277	$129,654	$90,277	$129,654

Other_Real_Estate_Owned_Additi

Other Real Estate Owned - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Banking and Thrift [Abstract]	'	'	'	'
Ending balances for OREO covered by FDIC	$14,900,000	$27,300,000	$14,900,000	$27,300,000
Ending balances for OREO non-covered	75,400,000	102,400,000	75,400,000	102,400,000
Proceeds on sale of OREO	16,000,000	17,500,000	64,360,000	62,165,000
Gains (losses) on sales of OREO	$223,000	($188,000)	$4,136,000	$3,204,000

Federal_Home_Loan_Bank_Advance2

Federal Home Loan Bank Advances and Short-Term Borrowings - Additional Information (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]	'	'
Short-term borrowings	$23,823,000	$24,850,000
Amounts of eligible collateral provided for incremental borrowing	58,700,000	95,400,000
Letters of credit issued by the Federal Home Loan Bank	25,700,000	25,600,000
Letter of credit used as collateral in lieu of pledging securities	$25,200,000	$25,200,000

Federal_Home_Loan_Bank_Advance3

Federal Home Loan Bank Advances and Short-Term Borrowings - Federal Home Loan Bank Advance Owed (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Contractual Outstanding Amount	$226,138	$96,278
FHLB Advances With 0.24%	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Contractual Outstanding Amount	50,000	'
Maturity Date	23-Oct-14	'
Contractual Rate	0.24%	'
FHLB Advances With 0.22%	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Contractual Outstanding Amount	40,000	'
Maturity Date	25-Nov-14	'
Contractual Rate	0.22%	'
FHLB Advances With 0.18%	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Contractual Outstanding Amount	60,000	'
Maturity Date	26-Dec-14	'
Contractual Rate	0.18%	'
FHLB Advances With 0.36%	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Contractual Outstanding Amount	75,000	95,000
Maturity Date	19-May-15	16-May-14
Contractual Rate	0.36%	0.36%
FHLB Advances With 0.50%	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Contractual Outstanding Amount	614	724
Maturity Date	6-Nov-17	6-Nov-17
Contractual Rate	0.50%	0.50%
FHLB Advances With 0.00%	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Contractual Outstanding Amount	$524	$554
Maturity Date	10-Feb-26	10-Feb-26
Contractual Rate	0.00%	0.00%

LongTerm_Borrowings_Schedule_o

Long-Term Borrowings - Schedule of Outstanding Structured Repurchase Agreements (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	$52,760	$53,449
Contractual Amount	50,000	'
4.75%	'	'
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	10,611	10,823
Contractual Amount	10,000	'
Maturity Date	'November 6, 2016	'
Contractual Rate	4.75%	'
4.50%	'	'
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	10,646	10,833
Contractual Amount	10,000	'
Maturity Date	'March 30, 2017	'
Contractual Rate	4.50%	'
3.79%	'	'
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	10,426	10,521
Contractual Amount	10,000	'
Maturity Date	'December 18, 2017	'
Contractual Rate	3.79%	'
3.72%	'	'
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	10,403	10,492
Contractual Amount	10,000	'
Maturity Date	'December 18, 2017	'
Contractual Rate	3.72%	'
3.56%	'	'
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	10,674	10,780
Contractual Amount	$10,000	'
Maturity Date	'March 22, 2019	'
Contractual Rate	3.56%	'

LongTerm_Borrowings_Summary_of

Long-Term Borrowings - Summary of Subordinated Debentures (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]	'	'
Face amount	$151,000	'
Carrying amount	83,096	81,557
Subordinated Debt 3 Point 80%, One	'	'
Debt Instrument [Line Items]	'	'
Date of offering	31-Jul-01	'
Face amount	5,000	'
Carrying amount	3,887	3,851
Debt Instrument, variable interest rate	3.82%	'
Maturity date	31-Jul-31	'
Subordinated debt interest rate	3.80%	'
Subordinated debt variable interest rate, basis points	3.58%	'
Subordinated Debt 3 Point 80%, Two	'	'
Debt Instrument [Line Items]	'	'
Date of offering	31-Jul-01	'
Face amount	4,000	'
Carrying amount	2,683	2,636
Debt Instrument, variable interest rate	3.82%	'
Maturity date	31-Jul-31	'
Subordinated debt interest rate	3.80%	'
Subordinated debt variable interest rate, basis points	3.58%	'
Subordinated Debt 3 Point 33%	'	'
Debt Instrument [Line Items]	'	'
Date of offering	26-Jun-03	'
Face amount	10,000	'
Carrying amount	5,992	5,921
Debt Instrument, variable interest rate	3.34%	'
Maturity date	26-Jun-33	'
Subordinated debt interest rate	3.33%	'
Subordinated debt variable interest rate, basis points	3.10%	'
Subordinated Debt 3 Point 08% One	'	'
Debt Instrument [Line Items]	'	'
Date of offering	25-Sep-03	'
Face amount	10,000	'
Carrying amount	6,478	6,368
Debt Instrument, variable interest rate	3.08%	'
Maturity date	25-Sep-33	'
Subordinated debt interest rate	3.08%	'
Subordinated debt variable interest rate, basis points	2.85%	'
Subordinated Debt 3 Point 08% Two	'	'
Debt Instrument [Line Items]	'	'
Date of offering	30-Dec-03	'
Face amount	10,000	'
Carrying amount	5,776	5,704
Debt Instrument, variable interest rate	3.09%	'
Maturity date	30-Dec-33	'
Subordinated debt interest rate	3.08%	'
Subordinated debt variable interest rate, basis points	2.85%	'
Subordinated Debt 1 Point 91%	'	'
Debt Instrument [Line Items]	'	'
Date of offering	28-Jun-05	'
Face amount	3,000	'
Carrying amount	1,582	1,545
Debt Instrument, variable interest rate	1.91%	'
Maturity date	28-Jun-35	'
Subordinated debt interest rate	1.91%	'
Subordinated debt variable interest rate, basis points	1.68%	'
Subordinated Debt 1 Point 63%	'	'
Debt Instrument [Line Items]	'	'
Date of offering	22-Dec-05	'
Face amount	10,000	'
Carrying amount	4,577	4,491
Debt Instrument, variable interest rate	1.63%	'
Maturity date	15-Mar-36	'
Subordinated debt interest rate	1.63%	'
Subordinated debt variable interest rate, basis points	1.40%	'
Subordinated Debt 1 Point 77%	'	'
Debt Instrument [Line Items]	'	'
Date of offering	28-Dec-05	'
Face amount	13,000	'
Carrying amount	6,615	6,458
Debt Instrument, variable interest rate	1.77%	'
Maturity date	15-Mar-36	'
Subordinated debt interest rate	1.77%	'
Subordinated debt variable interest rate, basis points	1.54%	'
Subordinated Debt 1 Point 78%	'	'
Debt Instrument [Line Items]	'	'
Date of offering	23-Jun-06	'
Face amount	20,000	'
Carrying amount	11,417	11,206
Debt Instrument, variable interest rate	1.78%	'
Maturity date	7-Jul-36	'
Subordinated debt interest rate	1.78%	'
Subordinated debt variable interest rate, basis points	1.55%	'
Subordinated Debt 1 Point 88%	'	'
Debt Instrument [Line Items]	'	'
Date of offering	16-May-07	'
Face amount	56,000	'
Carrying amount	28,688	28,050
Debt Instrument, variable interest rate	1.88%	'
Maturity date	15-Jun-37	'
Subordinated debt interest rate	1.88%	'
Subordinated debt variable interest rate, basis points	1.65%	'
Subordinated Debt 1 Point 66%	'	'
Debt Instrument [Line Items]	'	'
Date of offering	15-Jun-07	'
Face amount	10,000	'
Carrying amount	$5,401	$5,327
Debt Instrument, variable interest rate	1.66%	'
Maturity date	6-Sep-37	'
Subordinated debt interest rate	1.66%	'
Subordinated debt variable interest rate, basis points	1.43%	'

LongTerm_Borrowings_Schedule_o1

Long-Term Borrowings- Schedule of Maturities of Long-Term Borrowings (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Due in 2014 through 2015	$0	'
Due in 2016	10,611	'
Due in 2017	31,475	'
Due in 2018	0	'
Thereafter	97,310	'
Total	139,396	138,561
Fixed Rate	'	'
Debt Instrument [Line Items]	'	'
Due in 2014 through 2015	0	'
Due in 2016	10,611	'
Due in 2017	31,475	'
Due in 2018	0	'
Thereafter	14,214	'
Total	56,300	'
Floating Rate	'	'
Debt Instrument [Line Items]	'	'
Due in 2014 through 2015	0	'
Due in 2016	0	'
Due in 2017	0	'
Due in 2018	0	'
Thereafter	83,096	'
Total	$83,096	'

LongTerm_Borrowings_Additional

Long-Term Borrowings - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended	9 Months Ended	0 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014	Mar. 18, 2013	Sep. 07, 2013	Sep. 30, 2014	Dec. 31, 2013
			Trust_Preferred_Securities			Subordinated Debt With Fixed 10% Interest Rate	Trust Preferred Securities	Trust Preferred Securities	Collateralized Mortgage-Backed Securities	Collateralized Mortgage-Backed Securities
								Subordinated Debt 1
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'	'
Weighted-average rate of repurchase agreements	'	'	'	'	'	'	'	'	4.06%	4.06%
Collateralized mortgage-backed securities	'	'	'	'	'	'	'	'	$63,200,000	$62,100,000
No. of trust preferred securities acquired	'	'	13	'	'	'	'	'	'	'
Life of debt securities and trust preferred securities	'	'	'30 years	'	'	'	'	'	'	'
Period allowed for deferral of interest payment on the trust preferred securities	'	'	'60 months	'	'	'	'	'	'	'
Redeemed securities issued	'	'	'	'	'	'	34,500,000	8,000,000	'	'
Fixed interest rate	'	'	'	'	'	10.00%	7.95%	10.60%	'	'
Gain (loss) on extinguishment of debt	0	430,000	0	122,000	'	'	-300,000	400,000	'	'
Subordinated promissory notes	'	'	'	'	'	3,400,000	'	'	'	'
Subordinated promissory notes, due date	'	'	18-Mar-20	'	'	'	'	'	'	'
Carrying value of promissory notes	'	'	$3,500,000	'	$3,600,000	'	'	'	'	'

Shareholders_Equity_and_Minimu2

Shareholders' Equity and Minimum Regulatory Capital Requirements - Minimum Ratios Along with the Actual Ratios for the Company and the Bank (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Consolidated	'	'
Tier One Leverage Capital [Abstract]	'	'
Adequately Capitalized Requirement Tier 1 Capital (to Average Assets) amount	$251,319	$254,126
Actual Tier 1 Capital (to Risk Weighted Assets) amount	923,231	949,619
Tier One Risk Based Capital [Abstract]	'	'
Adequately Capitalized Requirement Tier 1 Capital (to Risk Weighted Assets) amount	197,728	192,428
Capital [Abstract]	'	'
Adequately Capitalized Requirement Total Capital (to Risk Weighted Assets) amount	395,456	384,856
Actual Total Capital (to Risk Weighted Assets) amount	979,541	1,010,422
Risk Based Ratios [Abstract]	'	'
Adequately Capitalized Requirement, Tier 1 Capital (to Average Assets)	4.00%	4.00%
Adequately Capitalized Requirement, Tier 1 Capital (to Risk Weighted Assets)	4.00%	4.00%
Adequately Capitalized Requirement, Total Capital (to Risk Weighted Assets)	8.00%	8.00%
Leverage Ratios [Abstract]	'	'
Actual, Tier 1 Capital (to Average Assets)	14.40%	14.90%
Actual, Tier 1 Capital (to Risk Weighted Assets)	18.40%	19.70%
Actual, Total Capital (to Risk Weighted Assets)	19.50%	21.00%
Capital Bank, NA	'	'
Tier One Leverage Capital [Abstract]	'	'
Well Capitalized Requirement Tier 1 Capital (to Average Assets) amount	313,810	317,562
Adequately Capitalized Requirement Tier 1 Capital (to Average Assets) amount	251,048	254,050
Actual Tier 1 Capital (to Risk Weighted Assets) amount	855,566	849,520
Tier One Risk Based Capital [Abstract]	'	'
Well Capitalized Requirement Tier 1 Capital (to Risk Weighted Assets) amount	296,245	288,410
Adequately Capitalized Requirement Tier 1 Capital (to Risk Weighted Assets) amount	197,497	192,273
Capital [Abstract]	'	'
Well Capitalized Requirement Total Capital (to Risk Weighted Assets) amount	493,742	480,683
Adequately Capitalized Requirement Total Capital (to Risk Weighted Assets) amount	394,994	384,546
Actual Total Capital (to Risk Weighted Assets) amount	$911,730	$910,162
Risk Based Ratios [Abstract]	'	'
Well Capitalized Requirement, Tier 1 Capital (to Average Assets)	5.00%	5.00%
Adequately Capitalized Requirement, Tier 1 Capital (to Average Assets)	4.00%	4.00%
Well Capitalized Requirement, Tier 1 Capital (to Risk Weighted Assets)	6.00%	6.00%
Adequately Capitalized Requirement, Tier 1 Capital (to Risk Weighted Assets)	4.00%	4.00%
Well Capitalized Requirement, Total Capital (to Risk Weighted Assets)	10.00%	10.00%
Adequately Capitalized Requirement, Total Capital (to Risk Weighted Assets)	8.00%	8.00%
Leverage Ratios [Abstract]	'	'
Actual, Tier 1 Capital (to Average Assets)	13.40%	13.40%
Actual, Tier 1 Capital (to Risk Weighted Assets)	17.10%	17.70%
Actual, Total Capital (to Risk Weighted Assets)	18.20%	18.90%

Shareholders_Equity_and_Minimu3

Shareholders' Equity and Minimum Regulatory Capital Requirements - Additional Information (Detail) (USD $)	0 Months Ended		9 Months Ended		21 Months Ended	0 Months Ended	3 Months Ended	9 Months Ended
	Jul. 08, 2014	Sep. 15, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013	Aug. 31, 2010
						Share Repurchase Plan	Share Repurchase Plan	Share Repurchase Plan	Capital Bank, NA	Capital Bank, NA	Capital Bank, NA
											Minimum
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total capital equal to risk - weighted assets	'	'	'	'	'	'	'	'	18.20%	18.90%	12.00%
Tier 1 capital equal to risk - weighted assets	'	'	'	'	'	'	'	'	17.10%	17.70%	11.00%
Minimum leverage ratio of (Tier 1 Capital ratio)	'	'	'	'	'	'	'	'	13.40%	13.40%	10.00%
Prohibited period for payment of dividend	'	'	'	'	'	'	'	'	'3 years	'	'
Period of retained net profits	'	'	'2 years	'	'	'	'	'	'	'	'
Approved dividend	$56,000,000	$105,000,000	'	'	'	'	'	'	'	'	'
Authorize stock repurchase, maximum amount	'	'	'	'	200,000,000	'	'	'	'	'	'
Common shares repurchased during the period, amount	'	'	85,382,000	62,884,000	'	155,300,000	19,500,000	85,400,000	'	'	'
Common shares repurchased during the period, shares	'	'	'	'	'	7,348,088	819,773	3,586,771	'	'	'
Average price of common shares	'	'	'	'	'	$21.14	$23.78	$23.80	'	'	'
Remaining availability for future share repurchases under the current authorization	'	'	'	'	'	'	$44,700,000	$44,700,000	'	'	'

StockBased_Compensation_Summar

Stock-Based Compensation - Summary of Components and Classification of Stock-Based Compensation Expense (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	$443	$1,371	$2,191	$4,312
Stock Options	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	195	215	560	395
Restricted Stock Awards	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	$248	$1,156	$1,631	$3,917

StockBased_Compensation_Summar1

Stock-Based Compensation - Summary of Weighted Average Assumptions to Compute the Grant-Date Fair Value of Options (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Dividend yield	0.00%
Risk-free interest rate	1.00%
Expected option life	'5 years 9 months
Volatility	37.00%
Weighted average grant-date fair value of options granted	$6.52

StockBased_Compensation_Summar2

Stock-Based Compensation - Summary of Stock Option Activity (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'
Beginning Balance, shares	3,123,000	2,890,000
Granted, shares	0	264,000
Exercised, shares	0	0
Canceled, expired or forfeited, shares	-11,000	-21,000
Ending Balance, shares	3,112,000	3,133,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]	'	'
Beginning balance, weighted average exercise price per share (in dollars per share)	$20.50	$21.39
Granted, weighted average exercise price per share (in dollars per share)	$0	$18
Exercised, weighted average exercise price per share (in dollars per share)	$0	$0
Canceled, expired or forfeited, weighted average exercise price per share (in dollars per share)	$75.94	$113.80
Ending balance, weighted average exercise price per share (in dollars per share)	$20.30	$20.50

StockBased_Compensation_Summar3

Stock-Based Compensation - Summary of Options Outstanding (Detail) (USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Remaining contractual life	'5 years 10 months 24 days
Range One	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Outstanding options, shares	236
Remaining contractual life	'8 years 7 months 20 days
Outstanding options, weighted average exercise price per share	18
Exercisable options, shares	118
Price per share	18
Exercise price	18
Range Two	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Outstanding options, shares	2,864
Remaining contractual life	'5 years 8 months 4 days
Outstanding options, weighted average exercise price per share	20
Exercisable options, shares	2,864
Price per share	20
Exercise price	20
Range Three	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Outstanding options, shares	12
Remaining contractual life	'3 years 2 months 23 days
Outstanding options, weighted average exercise price per share	138.87
Exercisable options, shares	12
Price per share	138.87
Exercise prices, lower range limit	28.44
Exercise prices, upper range limit	2,026
Range Four	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Outstanding options, shares	3,112
Remaining contractual life	'5 years 10 months 24 days
Outstanding options, weighted average exercise price per share	20.3
Exercisable options, shares	2,994
Price per share	20.39
Exercise prices, lower range limit	18
Exercise prices, upper range limit	2,026

StockBased_Compensation_Summar4

Stock-Based Compensation - Summary of Unvested Restricted Stock Awards (Detail) (USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'	'
Beginning balance, shares	1,215	1,212
Granted, shares	0	4
Vested or released, shares	-405	0
Expired or forfeited, shares	0	0
Ending balance, shares	810	1,216
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]	'	'
Beginning balance, weighted average grant date fair value (in dollars per share)	$14.28	$14.27
Granted, weighted average grant date fair value (in dollars per share)	$0	$18
Vested or released, weighted average grant date fair value (in dollars per share)	$15.07	$0
Expired or forfeited, weighted average grant date fair value (in dollars per share)	$0	$0
Ending balance, weighted average grant date fair value (in dollars per share)	$13.89	$14.28

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Apr. 02, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Jun. 05, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

21-May-13

Stock Options

Stock Options

Stock Options

Stock Options

Restricted Stock Awards

Restricted Stock Awards

Restricted Stock Awards

Restricted Stock Awards

Restricted Stock Awards

Restricted Stock Awards

Restricted Stock Awards

Restricted Stock Awards

2013 Plan

2013 Plan

2013 Plan

2013 Plan

2013 Plan

2010 And 2013 Plan

2010 And 2013 Plan

2010 And 2013 Plan

2010 And 2013 Plan

2010 And 2013 Plan

2010 And 2013 Plan

2010 Plan

Vesting Goal One

Vesting Goal Two

Vesting Goal Three

Maximum

Restricted Stock Awards

Restricted Stock Awards

Stock Award

Stock Options

Stock Options

Stock Options

Stock Options

Restricted Stock Awards

Directors

OptionPlan

10% Percent Owners

Maximum

Minimum

10% Percent Owners

10% Percent Owners

Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]

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Equity incentive plan effective date

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22-May-13

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Equity incentive plan expiration date

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22-May-23

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Number of shares to be awarded under the plan

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2,639,000

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Tax benefit related to stock-based compensation expense

$200,000

$500,000

$900,000

$1,700,000

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Exercise price for common stock as a percentage of fair value

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100.00%

110.00%

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Stock ownership percentage for 110% exercise price

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10.00%

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Stock award exercise expiration period from grant date

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'10 years

'5 years

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Stock options granted

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0

0

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Options exercised after ten years

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0

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Options exercised after ten years

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0

264,000

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264,000

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Stock option average period vested

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'2 years

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Outstanding options, weighted average remaining contractual life

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'5 years 10 months 24 days

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Aggregate intrinsic value for stock options outstanding

12,500,000

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12,500,000

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Aggregate intrinsic value for stock options exercisable

11,800,000

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11,800,000

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Restricted stock price awards vested

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$25

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$25

$28

$32

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Trading period for determining stock price

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'30 days

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Restricted stock granted to directors

'

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0

4,000

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'

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0

0

11,880

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'

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4,000

Stock award vested during period

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405,133

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Excess tax benefits related to restricted stock awards

'

'

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1,700,000

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Compensation expense for stock awards

$443,000

$1,371,000

$2,191,000

$4,312,000

$195,000

$215,000

$560,000

$395,000

'

$248,000

$1,156,000

$1,631,000

$3,917,000

'

'

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$300,000

'

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'

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Income Tax Computed at Applicable Federal Statutory Income Tax Rates to Total Income Taxes (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Income before income taxes	$21,296	$20,419	$59,959	$46,736
Income taxes computed at Federal statutory tax rate	7,454	7,147	20,986	16,358
Effect of:	'	'	'	'
State taxes (net of federal benefit)	754	784	2,237	1,795
State statutory rate change	0	1,545	0	1,545
Tax-exempt interest income, net	-152	-163	-485	-503
Contingent value right expense	97	-301	480	1,156
Other, net	-100	-37	-341	-253
Total income tax expense	$8,053	$8,975	$22,877	$20,098

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'	'	'	'	'
Income tax rates	38.00%	44.00%	38.00%	43.00%	'
Income tax expense resulted from change in tax rate	'	$1,500,000	'	'	'
Deferred income tax asset, net	139,388,000	'	139,388,000	'	166,762,000
Valuation allowance	0	'	0	'	0
Unrecognized tax benefits	0	'	0	'	0
Uncertain tax positions	$0	'	$0	'	$0

Fair_Value_Assets_and_Liabilit

Fair Value - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'
Trading securities	$2,312	$6,348
Available-for-sale securities:	'	'
Available-for-sale securities	580,732	685,441
Asset-Backed Securities	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	'	133,225
Industrial Revenue Bonds	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	3,724	3,859
Marketable Equity Securities	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	946	931
Collateralized Debt Obligations	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	'	800
Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Assets	'	'
Trading securities	0	4,477
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	2,312	1,871
Available-for-sale securities:	'	'
Available-for-sale securities	577,008	681,582
Gross asset value of derivatives	15	15
Liabilities	'	'
Gross liability value of derivatives	21	1,330
Significant Unobservable Inputs (Level 3)	'	'
Assets	'	'
Trading securities	0	0
Available-for-sale securities:	'	'
Available-for-sale securities	3,724	3,859
Gross asset value of derivatives	0	0
Liabilities	'	'
Gross liability value of derivatives	0	0
Fair Value on Recurring Basis	'	'
Assets	'	'
Trading securities	2,312	6,348
Available-for-sale securities:	'	'
Available-for-sale securities	580,732	685,441
Gross asset value of derivatives	15	15
Liabilities	'	'
Gross liability value of derivatives	21	1,330
Fair Value on Recurring Basis | Asset-Backed Securities	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	'	133,225
Fair Value on Recurring Basis | Mortgage-Backed Securities-Residential	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	576,062	546,626
Fair Value on Recurring Basis | Industrial Revenue Bonds	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	3,724	3,859
Fair Value on Recurring Basis | Marketable Equity Securities	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	946	931
Fair Value on Recurring Basis | Collateralized Debt Obligations	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	'	800
Fair Value on Recurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Assets	'	'
Trading securities	0	4,477
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) | Asset-Backed Securities	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	'	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) | Marketable Equity Securities	'	'
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) | Collateralized Debt Obligations	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	'	0
Fair Value on Recurring Basis | Significant Other Observable Inputs (Level 2)	'	'
Assets	'	'
Trading securities	2,312	1,871	[1]
Available-for-sale securities:	'	'
Available-for-sale securities	577,008	681,582
Gross asset value of derivatives	15	15
Liabilities	'	'
Gross liability value of derivatives	21	1,330
Fair Value on Recurring Basis | Significant Other Observable Inputs (Level 2) | Asset-Backed Securities	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	'	133,225
Fair Value on Recurring Basis | Significant Other Observable Inputs (Level 2) | Mortgage-Backed Securities-Residential	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	576,062	546,626
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) | Marketable Equity Securities	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	946	931	[1]
Fair Value on Recurring Basis | Significant Other Observable Inputs (Level 2) | Collateralized Debt Obligations	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	'	800
Fair Value on Recurring Basis | Significant Unobservable Inputs (Level 3)	'	'
Assets	'	'
Trading securities	0	0
Available-for-sale securities:	'	'
Available-for-sale securities	3,724	3,859
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) | Asset-Backed Securities	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	'	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	3,724	3,859
Fair Value on Recurring Basis | Significant Unobservable Inputs (Level 3) | Marketable Equity Securities	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	0	0
Fair Value on Recurring Basis | Significant Unobservable Inputs (Level 3) | Collateralized Debt Obligations	'	'
Available-for-sale securities:	'	'
Available-for-sale securities	'	$0
[1]	Transferred from Level 1 to Level 2 due to limited observable market data.

Fair_Value_Fair_Value_Measurem

Fair Value - Fair Value Measurements on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail) (Significant Unobservable Inputs (Level 3), Fair Value on Recurring Basis, USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Corporate Bonds	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Beginning balance	'	$0	'	$26
Included in earnings-gain on sales	'	'	'	199
Included in other comprehensive income	'	0	'	0
Sales	'	'	'	-225
Ending balance	'	'	'	'
Industrial Revenue Bonds	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Beginning balance	3,736	3,872	3,859	3,800
Included in earnings-gain on sales	'	'	'	0
Principal reduction	'	'	-170	'
Included in other comprehensive income	-12	93	35	165
Sales	'	'	'	0
Ending balance	3,724	3,965	3,724	3,965
Collateralized Debt Obligations	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Beginning balance	'	301	'	297
Included in earnings-gain on sales	'	'	'	0
Included in other comprehensive income	'	28	'	32
Sales	'	'	'	0
Ending balance	'	$329	'	$329

Fair_Value_Quantitative_Inform

Fair Value - Quantitative Information About Recurring Level 3 Fair Value Measurements (Detail) (Significant Unobservable Inputs (Level 3), USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Fair Value	$5,326,850	$5,342,254
Fair Value on Recurring Basis | Industrial Revenue Bonds | Discounted Cash Flow	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Fair Value	$3,724	$3,859
Discount Rate	3.20%	'
Illiquidity factor	0.50%	0.50%
Fair Value on Recurring Basis | Industrial Revenue Bonds | Discounted Cash Flow | Minimum	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Discount Rate	'	3.70%
Fair Value on Recurring Basis | Industrial Revenue Bonds | Discounted Cash Flow | Maximum	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Discount Rate	'	3.90%

Fair_Value_Fair_Value_Assets_a

Fair Value Fair Value - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Other real estate owned	$90,277	$96,283	$129,396	$129,654	$142,793	$154,093
Fair Value on Nonrecurring Basis | 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	0	'	0	'	'	'
Impaired loans	'	'	0	'	'	'
Fair Value on Nonrecurring Basis | 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	144	'	108	'	'	'
Impaired loans	'	'	0	'	'	'
Fair Value on Nonrecurring Basis | Significant Unobservable Inputs (Level 3)	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Other real estate owned	77,856	'	118,579	'	'	'
Other repossessed assets	0	'	0	'	'	'
Impaired loans	'	'	$1,332	'	'	'

Fair_Value_Quantitative_Inform1

Fair Value - Quantitative Information About Nonrecurring Level 3 Fair Value Measurements (Detail) (Significant Unobservable Inputs (Level 3), USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value	4,983,321	4,755,099
Fair Value on Nonrecurring Basis	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Impaired loans	'	1,332
Fair Value of Property | Fair Value on Nonrecurring Basis | Other real estate owned	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value	77,856	118,579
Fair Value of Collateral | Fair Value on Nonrecurring Basis | Impaired Loans	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Impaired loans	'	1,332
Appraised value less costs to sell	'	8.00%
Minimum | Fair Value of Property | Fair Value on Nonrecurring Basis | Other real estate owned	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Appraised value less costs to sell	6.00%	7.00%
Maximum | Fair Value of Property | Fair Value on Nonrecurring Basis | Other real estate owned	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Appraised value less costs to sell	10.00%	10.00%

Fair_Value_Carrying_Amounts_an

Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) (USD $)	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financial Assets	'		'		'	'
Trading securities	$2,312		$6,348		'	'
Investment securities available-for-sale	580,732		685,441		'	'
Investment securities held-to-maturity	457,712		459,693		'	'
FDIC indemnification asset	21,025		33,610		36,837	49,417
Financial Liabilities	'		'		'	'
Contractual deposits	1,430,106		1,447,497		'	'
Federal Home Loan Bank advances	226,138		96,278		'	'
Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'		'	'
Financial Assets	'		'		'	'
Cash and cash equivalents	159,410		164,441		'	'
Trading securities	0		4,477		'	'
Investment securities available-for-sale	0		0		'	'
Investment securities held-to-maturity	0		0		'	'
Loans, net	0		0		'	'
FDIC indemnification asset	0		0		'	'
Receivable from FDIC	0		0		'	'
Other earning assets	0	[1]	0	[1]	'	'
Gross asset value of derivatives	0		0		'	'
Total financial assets	159,410		168,918		'	'
Financial Liabilities	'		'		'	'
Non-contractual deposits	0		0		'	'
Contractual deposits	0		0		'	'
Federal Home Loan Bank advances	0		0		'	'
Short-term borrowings	0		0		'	'
Long-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	2,312		1,871		'	'
Investment securities available-for-sale	577,008		681,582		'	'
Investment securities held-to-maturity	457,712		459,693		'	'
Loans, net	6,439		8,012		'	'
FDIC indemnification asset	0		0		'	'
Receivable from FDIC	3,491		7,624		'	'
Other earning assets	0	[1]	0	[1]	'	'
Gross asset value of derivatives	15		15		'	'
Total financial assets	1,046,977		1,158,797		'	'
Financial Liabilities	'		'		'	'
Non-contractual deposits	0		0		'	'
Contractual deposits	0		0		'	'
Federal Home Loan Bank advances	226,073		96,241		'	'
Short-term borrowings	23,823		24,850		'	'
Long-term borrowings	0		0		'	'
Subordinated debentures	0		0		'	'
Gross liability value of derivatives	21		1,330		'	'
Total financial liabilities	249,917		122,421		'	'
Significant Unobservable Inputs (Level 3)	'		'		'	'
Financial Assets	'		'		'	'
Cash and cash equivalents	0		0		'	'
Trading securities	0		0		'	'
Investment securities available-for-sale	3,724		3,859		'	'
Investment securities held-to-maturity	0		0		'	'
Loans, net	4,910,776		4,673,542		'	'
FDIC indemnification asset	21,025		33,610		'	'
Receivable from FDIC	0		0		'	'
Other earning assets	47,796	[1]	44,088	[1]	'	'
Gross asset value of derivatives	0		0		'	'
Total financial assets	4,983,321		4,755,099		'	'
Financial Liabilities	'		'		'	'
Non-contractual deposits	3,745,350		3,737,566		'	'
Contractual deposits	1,428,890		1,448,032		'	'
Federal Home Loan Bank advances	0		0		'	'
Short-term borrowings	0		0		'	'
Long-term borrowings	54,454		55,861		'	'
Subordinated debentures	98,156		100,795		'	'
Gross liability value of derivatives	0		0		'	'
Total financial liabilities	5,326,850		5,342,254		'	'
Carrying Value	'		'		'	'
Financial Assets	'		'		'	'
Cash and cash equivalents	159,410		164,441		'	'
Trading securities	2,312		6,348		'	'
Investment securities available-for-sale	580,732		685,441		'	'
Investment securities held-to-maturity	454,809		465,098		'	'
Loans, net	4,771,437		4,495,178		'	'
FDIC indemnification asset	21,025		33,610		'	'
Receivable from FDIC	3,491		7,624		'	'
Other earning assets	47,796	[1]	44,088	[1]	'	'
Gross asset value of derivatives	15		15		'	'
Total financial assets	6,041,027		5,901,843		'	'
Financial Liabilities	'		'		'	'
Non-contractual deposits	3,745,350		3,737,566		'	'
Contractual deposits	1,430,106		1,447,497		'	'
Federal Home Loan Bank advances	226,138		96,278		'	'
Short-term borrowings	23,823		24,850		'	'
Long-term borrowings	52,760		53,449		'	'
Subordinated debentures	86,636		85,112		'	'
Gross liability value of derivatives	21		1,330		'	'
Total financial liabilities	5,564,834		5,446,082		'	'
Estimated Fair Value	'		'		'	'
Financial Assets	'		'		'	'
Cash and cash equivalents	159,410		164,441		'	'
Trading securities	2,312		6,348		'	'
Investment securities available-for-sale	580,732		685,441		'	'
Investment securities held-to-maturity	457,712		459,693		'	'
Loans, net	4,917,215		4,681,554		'	'
FDIC indemnification asset	21,025		33,610		'	'
Receivable from FDIC	3,491		7,624		'	'
Other earning assets	47,796	[1]	44,088	[1]	'	'
Gross asset value of derivatives	15		15		'	'
Total financial assets	6,189,708		6,082,814		'	'
Financial Liabilities	'		'		'	'
Non-contractual deposits	3,745,350		3,737,566		'	'
Contractual deposits	1,428,890		1,448,032		'	'
Federal Home Loan Bank advances	226,073		96,241		'	'
Short-term borrowings	23,823		24,850		'	'
Long-term borrowings	54,454		55,861		'	'
Subordinated debentures	98,156		100,795		'	'
Gross liability value of derivatives	21		1,330		'	'
Total financial liabilities	$5,576,767		$5,464,675		'	'
[1]	Includes Federal Reserve Bank, Federal Home Loan Bank and Bankers Bank stock.

Fair_Value_Additional_Informat

Fair Value - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended						9 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2014	Dec. 31, 2013
									Carrying Value	Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'	'	'	'	'	'
Transfers of assets and liabilities between levels of the fair value	$0	'	$0	'	'	'	'	'	'	'
Other real estate owned	90,277,000	129,654,000	90,277,000	129,654,000	96,283,000	129,396,000	142,793,000	154,093,000	99,500,000	138,400,000
Other real estate valuation allowance	$2,752,000	$6,045,000	$9,347,000	$18,844,000	'	'	'	'	$21,600,000	$19,800,000

Derivative_Instrument_Summary_

Derivative Instrument - Summary of Derivative Instrument Contracts Fair Value and Notional Amount (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'
Derivative [Line Items]	'	'
Derivative, Notional Amount	$6,054	$16,715
Assets | Interest Rate Cap Contracts (Matured in 2014)	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	0	0
Derivative, Notional Amount	0	12,500
Assets | Forward Loan Sales Contracts (Maturing in 2014)	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	15	15
Derivative, Notional Amount	6,054	4,215
Liabilities	'	'
Derivative [Line Items]	'	'
Derivative, Notional Amount	8,096	28,545
Liabilities | Forward Loan Sales Contracts (Maturing in 2014)	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	21	10
Derivative, Notional Amount	8,096	3,545
Liabilities | Interest Rate Swaps Associated with Certificates of Deposits (Maturing in 2040)	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	0	1,320
Derivative, Notional Amount	0	25,000
Significant Other Observable Inputs (Level 2)	'	'
Derivative [Line Items]	'	'
Gross asset value of derivatives	15	15
Gross liability value of derivatives	21	1,330
Significant Other Observable Inputs (Level 2) | Assets	'	'
Derivative [Line Items]	'	'
Gross asset value of derivatives	15	15
Significant Other Observable Inputs (Level 2) | Liabilities	'	'
Derivative [Line Items]	'	'
Gross liability value of derivatives	$21	$1,330

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Non-Interest Income	'	'	'	'
Gain (loss) on derivative	$29,000	($300,000)	$1,800,000	($700,000)
Non-Interest Expense	'	'	'	'
Gain (loss) on derivative	14,000	200,000	49,000	400,000
Interest Rate Swaps Associated with Certificates of Deposits (Maturing in 2040) | Non-Interest Expense	'	'	'	'
Loss on termination of derivative	'	'	$300,000	'