Capital Bank Financial (CBF) 10-Q 8 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 31, 2013	Oct. 31, 2013
		Common Class A [Member]	Common Class B [Member]
Document Information [Line Items]	'	'	'
Document Type	'10-Q	'	'
Amendment Flag	'false	'	'
Document Period End Date	30-Sep-13	'	'
Document Fiscal Year Focus	'2013	'	'
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	'Non-accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	32,432,736	19,681,637

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'	'
Cash and due from banks	$115,671	$142,361
Interest-bearing deposits with banks	48,033	592,375
Federal funds sold	'	138
Total cash and cash equivalents	163,704	734,874
Trading securities	6,091	0
Investment securities available-for-sale at fair value (amortized cost $718,400 and $991,566 at September 30, 2013 and December 31, 2012, respectively)	717,602	1,006,744
Investment securities held-to-maturity at amortized cost (fair value $483,413 and $0 at September 30, 2013 and December 31, 2012, respectively)	482,986	'
Loans held for sale	8,918	11,276
Loans, net of deferred loan costs and fees	4,468,362	4,724,214
Less: allowance for loan losses	56,393	57,262
Loans, net	4,411,969	4,666,952
Other real estate owned	129,654	154,093
Receivable from FDIC	8,439	8,486
Indemnification asset	36,837	49,417
Premises and equipment, net	183,498	198,457
Goodwill	131,987	131,987
Intangible assets, net	24,681	28,636
Deferred income tax asset, net	177,928	183,157
Accrued interest receivable and other assets	117,017	132,874
Total assets	6,601,311	7,306,953
Deposits	'	'
Noninterest-bearing demand	937,152	895,274
Time deposits	1,579,772	2,070,698
Money market	938,854	1,125,967
Savings	531,655	492,187
Negotiable order of withdrawal accounts	1,281,036	1,288,742
Total deposits	5,268,469	5,872,868
Federal Home Loan Bank advances	1,324	1,460
Short-term borrowings	23,224	41,508
Long-term borrowings	138,290	180,430
Accrued interest payable and other liabilities	62,179	55,344
Total liabilities	5,493,486	6,151,610
Shareholders' Equity	'	'
Preferred stock $0.01 par value: 50,000 shares authorized, 0 shares issued	'	'
Additional paid in capital	1,081,108	1,076,797
Retained earnings	95,279	68,641
Accumulated other comprehensive (loss) income	-6,236	9,347
Treasury stock, at cost, 3,439 shares	-62,884	'
Total shareholders' equity	1,107,825	1,155,343
Total liabilities and shareholders' equity	6,601,311	7,306,953
Common Class A [Member]	'	'
Shareholders' Equity	'	'
Common stock Value	361	330
Total shareholders' equity	361	330
Common Class B [Member]	'	'
Shareholders' Equity	'	'
Common stock Value	197	228
Total shareholders' equity	$197	$228

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Per Share data, unless otherwise specified
Amortized cost of investment securities available-for-sale	$718,400	$991,566
Fair value of investment securities held-to-maturity	$483,413	$0
Preferred stock, par value	$0.01	$0.01
Preferred stock, authorized shares	50,000	50,000
Preferred stock, issued shares	0	0
Treasury Stock, Shares	3,439	'
Common Class A [Member]	'	'
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	36,177	33,025
Common stock, shares outstanding	32,738	33,025
Common Class B [Member]	'	'
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	19,681	22,821
Common stock, shares outstanding	19,681	22,821

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest and dividend income	'	'	'	'
Loans, including fees	$67,355	$64,866	$207,327	$199,476
Investment securities:	'	'	'	'
Taxable interest income	4,383	3,738	11,925	14,516
Tax-exempt interest income	158	175	484	663
Dividends	14	18	44	49
Interest-bearing deposits in other banks	37	181	510	468
Federal Home Loan Bank stock	533	460	1,485	1,293
Federal funds sold	'	'	'	7
Total interest and dividend income	72,480	69,438	221,775	216,472
Interest expense	'	'	'	'
Deposits	5,135	7,023	17,541	22,181
Long-term borrowings	1,952	1,951	6,346	5,823
Federal Home Loan Bank advances	1	115	3	884
Other borrowings	6	15	33	53
Total interest expense	7,094	9,104	23,923	28,941
Net interest income	65,386	60,334	197,852	187,531
Provision for loan losses	984	5,771	10,853	17,755
Net interest income after provision for loan losses	64,402	54,563	186,999	169,776
Noninterest income	'	'	'	'
Service charges on deposit accounts	6,034	5,058	18,711	17,381
Fees on mortgage loans originated and sold	1,477	1,612	4,319	3,920
Investment advisory and trust fees	740	253	1,380	991
FDIC indemnification asset (amortization) accretion	-502	850	-3,779	1,008
Debit card income	2,854	2,442	8,669	7,792
Other income	4,078	1,675	9,591	4,152
Legal Settlements and insurance recoveries	900	3,460	900	3,460
Investment securities (losses) gains, net	-247	4,918	-42	8,610
Other-than-temporary impairment losses on investments:	'	'	'	'
Gross impairment loss	-54	'	-54	-44
Less: Impairments recognized in other comprehensive income	'	'	'	'
Net impairment losses recognized in earnings	-54	'	-54	-44
Total noninterest income	15,280	20,268	39,695	47,270
Noninterest expense	'	'	'	'
Salaries and employee benefits	22,606	21,295	66,085	66,951
Stock-based compensation expense	1,371	4,242	4,312	14,927
Net occupancy and equipment expense	10,740	9,355	31,973	28,229
OREO valuation expenses	6,045	8,633	18,844	15,529
Loss (gain) on sales of OREO	188	-1,514	-3,204	-3,937
Foreclosed asset related expense	1,265	2,530	4,909	7,414
Loan workout expense	2,063	2,310	6,363	5,755
Conversion and merger related expense	-19	3,894	234	6,939
Professional fees	2,426	2,759	7,418	9,511
(Gain) loss on extinguishment of debt	-430	2,946	-122	3,267
Legal settlement expenses	535	1,755	535	2,752
Computer services	3,231	2,368	9,872	6,913
CVR (income) expense	-776	-179	2,535	-179
FDIC assessments	1,710	1,655	5,276	4,955
Telecommunication expenses	1,534	1,630	4,919	4,208
Other expenses	6,774	5,692	20,009	18,004
Total noninterest expense	59,263	69,371	179,958	191,238
Income before income taxes	20,419	5,460	46,736	25,808
Income tax expense (benefit)	8,975	-32,385	20,098	-24,573
Net income before attribution of noncontrolling interests	11,444	37,845	26,638	50,381
Net income attributable to noncontrolling interests	'	2,762	'	4,534
Net income attributable to Capital Bank Financial Corp.	$11,444	$35,083	$26,638	$45,847
Basic income per share	$0.22	$0.76	$0.50	$1.01
Diluted income per share	$0.22	$0.75	$0.49	$1

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]	'	'	'	'
Net income	$11,444	$37,845	$26,638	$50,381
Other comprehensive income (loss) before tax:	'	'	'	'
Unrealized holding gains (losses) on available for sale securities	17,692	6,374	-15,826	15,680
Unrealized holding loss on investment securities transferred from available-for-sale to held-to-maturity	-9,354	'	-9,354	'
Less: Reclassification adjustments for losses (gains) recognized in income	54	-4,913	-151	-8,439
Other comprehensive income (loss) , before tax	8,392	1,461	-25,331	7,241
Tax effect	-3,234	-564	9,748	-2,792
Other comprehensive income (loss), net of tax	5,158	897	-15,583	4,449
Comprehensive income	16,602	38,742	11,055	54,830
Less: Comprehensive income attributable to noncontrolling interests	'	2,803	'	4,895
Comprehensive income attributable to Capital Bank Financial Corp.	$16,602	$35,939	$11,055	$49,935

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholders' Equity (USD $)	Total	Common Class A [Member]	Common Class B [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Stock [Member]	Non-controlling Interests [Member]
In Thousands
Beginning balance at Dec. 31, 2011	$990,910	$200	$261	$890,627	$18,150	$7,167	'	$74,505
Beginning balance, shares at Dec. 31, 2011	'	20,028	26,122	'	'	'	'	'
Net income	50,381	'	'	'	45,847	'	'	4,534
Other comprehensive income (loss), net of tax benefit	4,449	'	'	'	'	4,088	'	361
Stock based compensation and related tax effect	14,927	'	'	14,914	'	'	'	13
Restricted stock grants, amount	'	3	'	-3	'	'	'	'
Restricted stock grants, shares	'	306	'	'	'	'	'	'
Issuance of shares for noncontrolling interest, value	'	37	'	78,128	'	1,248	'	-79,413
Issuance of shares for noncontrolling interest, shares	'	3,706	'	'	'	'	'	'
Initial public offering, value	89,464	57	'	89,407	'	'	'	'
Initial public offering, shares	'	5,682	'	'	'	'	'	'
Conversion of shares, amount	'	29	-29	'	'	'	'	'
Conversion of shares, shares	'	2,924	-2,924	'	'	'	'	'
Ending balance at Sep. 30, 2012	1,150,131	326	232	1,073,073	63,997	12,503	'	'
Ending balance, shares at Sep. 30, 2012	'	32,646	23,198	'	'	'	'	'
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	22,821	'	'	'	'	'
Net income	26,638	'	'	'	26,638	'	'	'
Other comprehensive income (loss), net of tax benefit	-15,583	'	'	'	'	-15,583	'	'
Fractional shares, amount	-1	'	'	-1	'	'	'	'
Fractional shares, shares	'	'	8	'	'	'	'	'
Stock based compensation and related tax effect	4,312	'	'	4,312	'	'	'	'
Restricted stock grants, amount	'	'	'	'	'	'	'	'
Restricted stock grants, shares	'	4	'	'	'	'	'	'
Purchase of treasury stock, amount	-62,884	'	'	'	'	'	-62,884	'
Purchase of treasury stock, shares	'	-3,439	'	'	'	'	'	'
Conversion of shares, amount	'	31	-31	'	'	'	'	'
Conversion of shares, shares	'	3,148	-3,148	'	'	'	'	'
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	19,681	'	'	'	'	'

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Other comprehensive income (loss) tax effect	$9,748	$2,792
Accumulated Other Comprehensive (Loss) Income [Member]	'	'
Other comprehensive income (loss) tax effect	9,748	2,792
Non-controlling Interests [Member]	'	'
Other comprehensive income (loss) tax effect	'	$2,792

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities	'	'
Net income	$26,638	$50,381
Adjustments to reconcile net income to net cash used in operating activities:	'	'
Accretion of acquired loans	-126,634	-142,024
Depreciation and amortization	15,795	12,111
Provision for loan losses	10,853	17,755
Deferred income tax	14,977	-33,037
Net amortization of investment securities premium/discount	9,339	9,209
Other than temporary impairment of investment securities	54	44
Net realized losses (gains) on investment securities	42	-8,610
Stock-based compensation expense	4,312	14,927
Gain on sales of OREO	-3,204	-3,937
OREO valuation expenses	18,844	15,529
Other	-2,454	-1,184
(Gain) loss on extinguishment of debt	-122	3,267
Mortgage loans originated for sale	-138,686	-137,633
Proceeds from sales of mortgage loans originated for sale	145,363	149,370
Fees on mortgage loans originated and sold	-4,319	-3,920
FDIC indemnification asset amortization (accretion)	3,779	-1,008
(Gain) loss on sale/disposal of premises and equipment	-419	85
Gain on exchange of partnership interest	-1,536	'
Proceeds from FDIC loss share agreements	12,211	19,264
Change in accrued interest receivable and other assets	10,507	-1,593
Change in accrued interest payable and other liabilities	6,658	2,684
Net cash provided by (used) in operating activities	1,998	-38,320
Cash flows from investing activities	'	'
Purchases of investment securities available-for-sale	-436,365	-666,605
Sales of investment securities available-for-sale	225	340,026
Repayments of principal and maturities of investment securities available for sale	178,592	177,781
Repayments of principal and maturities of investment securities held-to-maturity	27,347	'
Net purchases of FHLB and Federal Reserve stock	-978	1,147
Purchase of trademark	'	-100
Net decrease in loans	319,814	297,418
Purchases of premises and equipment	-2,473	-11,716
Proceeds from sales of premises and equipment	6,707	'
Proceeds from sales of OREO	62,165	77,073
Net cash provided by investing activities	155,034	215,024
Cash flows from financing activities	'	'
Net (decrease) increase in demand, money market and savings accounts	-113,473	123,237
Net decrease in time deposits	-490,925	-401,166
Net decrease in federal funds purchased and securities sold under agreements to repurchase	-18,284	-12,839
Net decrease of long term FHLB advances	-136	-223,162
Prepayment of long-term borrowings	-42,500	'
Purchase of treasury stock	-62,884	'
Proceeds from initial public offering	'	89,465
Net cash used in financing activities	-728,202	-424,465
Net decrease in cash and cash equivalents	-571,170	-247,761
Cash and cash equivalents at beginning of period	734,874	709,963
Cash and cash equivalents at end of period	163,704	462,202
Supplemental disclosures of cash:	'	'
Interest paid	28,725	34,074
Cash collections of contractual interest on purchased credit impaired loans	91,983	84,441
Income taxes paid	1,641	16,781
Supplemental disclosures of noncash transactions :	'	'
OREO acquired through loan transfers	53,366	65,530
Transfer of available-for-sale securities to held-to-maturity securities	510,976	'
Transfer of OREO to premises and equipment	'	1,026
Transfer of financed portion of premises and equipment sold	'	930
Non-cash portion of acquired premises and equipment	'	($2,717)

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Basis of Presentation	'
	1. 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 163 full service banking offices located in Florida, North Carolina, South Carolina, Tennessee and Virginia.
	In September 2012, Capital Bank Corporation (“CBKN”), Green Bankshares Inc. (“GRNB”) and TIB Financial Corp. (“TIBB”), then majority owned subsidiaries of the Company, merged with and into Capital Bank Financial Corp. with CBF continuing as the surviving corporation (the “Reorganization”). Upon completion of the Reorganization, the outstanding common shares held by the minority shareholders were converted into an aggregate of 3.7 million shares of CBF’s Class A common stock.
	The Reorganization was accounted for as a merger with CBF as the accounting acquirer (which is the surviving entity for legal purposes). As this was a common control transaction under Accounting Standard Codification (“ASC”) 805, Business Combinations, the Reorganization was accounted for as an equity transaction in accordance with ASC 810, Consolidation, as the acquisition of a noncontrolling interest. As a result, there was no adjustment to CBF’s historical carrying amounts of assets and liabilities reflected in the accompanying balance sheet.
	On October 1, 2012, the Company completed its acquisition of Southern Community Financial Corporation (“SCMF” or “Southern Community”), a publicly held bank holding company headquartered in Winston Salem, North Carolina. See Note 3 – Business Combinations, for further information regarding this acquisition.
	The accompanying unaudited consolidated financial statements for the Company 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 US 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 our annual report on Form 10-K for the fiscal year ended December 31, 2012.
	Certain prior period amounts have been reclassified to conform to the current period presentation.
	Direct Financing Leases
	Direct financing leases are carried at the aggregate of lease payments receivable and estimated residual value of the leased property, if applicable, less unearned income. Interest income on direct financing leases is recognized over the term of the leases to achieve a constant periodic rate of return on the outstanding investment. Initial direct costs are deferred and amortized over the lease term as a reduction to interest income using the effective interest method.
	Loss Contingencies
	Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there are currently any such matters that will have a material effect on the financial statements.
	Recent Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists”. This update requires an unrecognized tax benefit related to a net operating loss carryforward, a similar tax loss or a tax credit carryforward to be presented as a reduction to a deferred tax asset, unless the tax benefit is not available at the reporting date to settle any additional income taxes under the tax law of the applicable tax jurisdiction. For public entities, this ASU is effective for fiscal years and interim periods beginning after December 15, 2013, with early adoption permitted. The adoption of this ASU is not expected to have a material effect on the Company’s consolidated financial statements.
	In February 2013, the FASB issued ASUNo. 2013-02, “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income .” This update requires entities to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, entities are required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income. For public entities, this ASU is effective prospectively for fiscal years and interim periods within those years beginning after December 15, 2012. This update adopted on January 1, 2013, as required, impacted presentation only and it did not have an impact on the Company’s consolidated financial position, results of operations or cash flows.
	In October 2012, the FASB issued ASU No. 2012-06, “Business Combinations: Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution.” This ASU addresses the diversity in practice about how to interpret the terms on the same basis and contractual limitations when subsequently measuring an indemnification asset recognized in a government-assisted (Federal Deposit Insurance Corporation or National Credit Union Administration) acquisition of a financial institution that includes a loss-sharing agreement (indemnification agreement). For public and nonpublic entities, the amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning on or after December 15, 2012. The amendments should be applied prospectively to any new indemnification assets acquired after the date of adoption and to indemnification assets existing as of the date of adoption arising from a government-assisted acquisition of a financial institution. The adoption on January 1, 2013, as required, did not have a material impact on the Company’s consolidated financial condition or results of operations. Subsequent changes in the measurement of the indemnification asset will be accounted for on the same basis as the changes in the assets subject to indemnification resulting from future changes in the expected cash flows.
	In December 2011, the FASB issued ASU 2011-11, “Disclosures about Offsetting Assets and Liabilities.” This update requires entities to disclose both gross information and net information about instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. The application of this ASU was clarified by ASU 2013-01. The scope of this ASU includes derivatives, sale and repurchase agreements and reverse sale and repurchase agreements and securities borrowing and lending arrangements. The Company is required to adopt this update for periods beginning after January 1, 2013, with restrocpective presentation for all comparative periods. The adoption did not 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, 2013
Earnings Per Share [Abstract]	'
Earnings Per Common Share	'
	2. Earnings Per Common Share
	Basic earnings per share is 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		Three Months		Nine Months		Nine Months
		Ended September 30,		Ended September  30,		Ended September  30,		Ended September  30,
		2013		2012		2013		2012
	Weighted average number of common shares outstanding:
	Basic		51,804		46,116		53,170		45,496
	Dilutive effect of options outstanding		31		—		—		—
	Dilutive effect of restricted shares		920		622		862		456
	Diluted		52,755		46,738		54,032		45,952
	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		Three Months Ended		Nine Months Ended		Nine Months Ended
		September  30,		September  30,		September  30,		September  30,
		2013		2012		2013		2012
	Anti-dilutive stock options		269		2,867		3,133		2,837
	Anti-dilutive restricted shares		—		—		—		—

Business_Combinations_and_Acqu

Business Combinations and Acquisitions	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Business Combinations and Acquisitions	'
	3. Business Combinations and Acquisitions
	CBF Acquisition of Southern Community Financial Corporation
	On October 1, 2012, the acquisition of all of the preferred and common share interests of Southern Community was consummated for a total purchase price of $99.3 million in cash. In addition, SCMF shareholders received a contingent value right (“CVR”) which could pay up to $1.30 per share (maximum potential payment of $21.9 million) in cash at the end of a five-year period based on 75% of the savings to the extent that legacy loan and foreclosed asset losses are less than a prescribed amount. As part of the acquisition, the Company purchased from the United States Department of the Treasury (the “Treasury”) all of the outstanding shares of Fixed Rate Cumulative Perpetual Preferred Stock, Series A and related warrants originally issued by SCMF to the Treasury in connection with SCMF’s participation in the Treasury’s Troubled Asset Relief Program (“TARP”). The cash purchase price included approximately $46.9 million paid in cash to the Treasury, which is equal to the outstanding liquidation amount of the preferred stock and is included in the $99.3 million above. Subsequently, SCMF cancelled the Series A Preferred stock. SCMF was the parent of Southern Community Bank and Trust, a bank with 22 branches in Winston-Salem, the Piedmont Triad, and other North Carolina markets. The estimated fair values of assets acquired and liabilities assumed in the acquisition of SCMF were based on the information that was available at the time. During the third quarter of 2013, CBF concluded that the underlying asset quality in the SCMF loan portfolio should lead to better credit performance than originally anticipated in our preliminary estimates of fair value. Completion of portfolio due diligence of credit attributes of the acquired loans not initially known but existing at the acquisition date, including assessment of the predecessor institution’s underwriting approach and practices, quality of risk ratings, and borrower credit scores, ultimately resulted in the necessity to revise the original estimate of fair value during the third quarter. As required by the acquisition method of accounting, the Company retrospectively adjusted the acquisition date balance sheet and the results of operations of the fourth quarter of 2012 and first two quarters of 2013 to reflect the following: (1) an increase in the estimated fair value of the loan portfolio; (2) an increase in the associated CVR; (3) a decrease in the deferred tax asset related to the increased value of loans; (4) a decrease in Goodwill caused by the net effect of these adjustments. All amounts presented herein reflect such adjustments. A reconciliation of their impact on the acquired assets, assumed liabilities and prior period operating results is shown below:
	(Dollars in thousands)	Reported on Dec. 31,		Measurement			Revised as of
		2012 as of October 1,		Period			October 1,  2012
		2012		Adjustments
	Fair value of assets acquired:
	Cash and cash equivalents	$	256,267				$	256,267
	Investment securities		189,771					189,771
	Loans		774,781		43,238			818,019
	Premises and equipment		35,061					35,061
	Other intangible assets		6,860					6,860
	Deferred tax asset		43,481		(15,532	)		27,949
	Other assets		60,159		(174	)		59,985
	Total assets acquired		1,366,380		27,532			1,393,912
	Fair value of liabilities assumed:
	Deposits		1,093,914					1,093,914
	Long term debt and other borrowings		187,341					187,341
	Other liabilities		17,703		11,656			29,359
	Total liabilities assumed		1,298,958		11,656			1,310,614
	Fair value of net assets acquired		67,422		15,876			83,298
	Purchase price		99,325					99,325
	Goodwill	$	31,903	$	(15,876	)	$	16,027
		For the Quarter Ended
		June 30,		June 30,			March 31,		March 31,		December 31,		December 31,
		2013		2013			2013		2013		2012		2012
		Revised		As Filed			Revised		As Filed		Revised		As filed
	Interest and dividend income	$	73,189	$	74,989		$	76,106	$	76,814	$	77,808	$	76,122
	Interest expense		7,837		7,837		$	8,992		8,992		10,115		10,115
	Net Interest Income		65,352		67,152			67,114		67,822		67,693		66,007
	Provision for loan losses		4,467		3,868			5,402		6,904		6,736		4,370
	Total non-interest income		13,506		13,506			10,909		10,909		15,438		15,438
	Total non-interest expense		59,382		59,141			61,313		61,040		68,720		68,448
	Income before income taxes		15,009		17,649			11,308		10,787		7,675		8,627
	Income tax expense		5,580		6,514			5,543		5,234		3,031		3,295
	Net income attributable to Capital Bank Financial Corp.	$	9,429	$	11,135		$	5,765	$	5,553		4,644	$	5,332
	Basic Earnings Per Common Share	$	0.18	$	0.21		$	0.11	$	0.1	$	0.09	$	0.1
	Diluted Earnings Per Common Share	$	0.17	$	0.21		$	0.11	$	0.1	$	0.08	$	0.1
	Pro Forma
	The following table reflects the pro forma total net interest income, non-interest income and net income for the three and nine months ended September 30, 2012 as though the acquisition of SCMF had taken place as of the beginning of fiscal 2012. The pro forma results are not necessarily indicative of the results of operations that would have occurred had the acquisition actually taken place on the first day of the respective period, nor of future results of operations.
	(Dollars in thousands)	Three Months		Nine Months
		Ended		Ended
		September 30,  2012		September 30,  2012
	Net interest income	$	69,422	$	218,207
	Non-interest income		34,467		68,800
	Net income attributable to Capital Bank Financial Corp.		46,604		59,274

Investment_Securities

Investment Securities	9 Months Ended
	Sep. 30, 2013
Investments Debt And Equity Securities [Abstract]	'
Investment Securities	'
	4. Investment Securities
	The amortized cost and estimated fair value of investment securities available-for-sale and held-to-maturity at September 30, 2013, and December 31, 2012 are presented below:
	(Dollars in thousands)	September 30, 2013
	Available-for-sale	Amortized		Unrealized		Unrealized			Estimated
		Cost		Gains		Losses			Fair Value
	Asset-backed securities	$	139,148	$	—	$	1,187		$	137,961
	Marketable equity securities		946		—		—			946
	Mortgage-backed securities—residential issued by government sponsored entities		574,051		4,229		3,879			574,401
	Industrial revenue bond		3,750		215		—			3,965
	Collateralized debt obligations		505		—		176			329
	Total	$	718,400	$	4,444	$	5,242		$	717,602
	Held-to-maturity
	U.S. Government agencies		15,192		—		307			14,885
	States and political subdivisions—tax exempt		14,172		44		27			14,189
	States and political subdivisions—taxable		547		—		6			541
	Mortgage-backed securities—residential issued by government sponsored entities		453,075		1,520		797			453,798
	Total	$	482,986	$	1,564	$	1,137		$	483,413
	(Dollars in thousands)	December 31, 2012
	Available-for-sale	Amortized		Unrealized		Unrealized			Estimated
		Cost		Gains		Losses			Fair Value
	Asset-backed securities	$	—	$	—	$	—		$	—
	U.S. Government agencies		7,913		102		—			8,015
	States and political subdivisions—tax exempt		16,019		1,196		—			17,215
	States and political subdivisions—taxable		509		64		—			573
	Marketable equity securities		2,731		—		12			2,719
	Mortgage-backed securities—residential issued by government sponsored entities		959,863		15,048		1,058			973,853
	Industrial revenue bond		3,750		50		—			3,800
	Corporate bonds		26		—		—			26
	Trust preferred securities		250		—		4			246
	Collateralized debt obligations		505		—		208			297
	Total	$	991,566	$	16,460	$	1,282		$	1,006,744
	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. There was no investment securities held-to-maturity at December 31, 2012.
	Proceeds from sales and calls of securities were $0.5 million and $2.1 million for the three and nine months ended September 30, 2013, respectively. Gross gains of approximately $0 and $0.2 million were realized on these sales and calls during the three and nine months ended September 30, 2013, respectively. Proceeds from sales and calls of securities available for sale were $247.3 million and $340.0 million for the three and nine months ended September 30, 2012, respectively. Gross gains of approximately $4.9 million and $8.4 million were realized on these sales and calls during the three and nine months ended September 30, 2012, respectively. Trading securities totaled $6.1 million and $0 at September 30, 2013 and December 31, 2012, respectively. Gross realized losses on trading securities were $0.2 million for the three and nine months ended September 30, 2013. Gross realized gains on trading securities were $0 for the three and nine months ended September 30, 2012.
	The estimated fair value of investment securities at September 30, 2013, by contractual maturity, are shown as 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)
	Available-for-sale	Amortized		Estimated		Yield
		Cost		Fair Value
	Due in one year or less	$	—	$	—		—	%
	Due after one year through five years		—		—		—	%
	Due after five years through ten years		58,422		58,064		0.62	%
	Due after ten years		84,981		84,191		0.69	%
	Mortgage-backed securities—residential issued by government sponsored entities		574,051		574,401		1.54	%
		$	717,454	$	716,656		1.36	%
	Marketable equity securities		946		946
		$	718,400	$	717,602
	Held-to-maturity	Amortized		Estimated		Yield
		Cost		Fair Value
	Due in one year or less	$	679	$	678		0.83	%
	Due after one year through five years		1,130		1,134		2.06	%
	Due after five years through ten years		7,198		7,197		3.03	%
	Due after ten years		20,904		20,606		3.05	%
	Mortgage-backed securities—residential issued by government sponsored entities		453,075		453,798		2.23	%
		$	482,986	$	483,413		2.27	%
	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
	September 30, 2013	Estimated Fair		Unrealized		Estimated Fair			Unrealized		Estimated Fair		Unrealized
		Value		Losses		Value			Losses		Value		Losses
	Available-for-sale:
	Asset-backed securities	$	137,961	$	1,187	$	—		$	—	$	137,961	$	1,187
	Mortgage-backed securities—residential issued by government sponsored entities		338,084		3,879		—			—		338,084		3,879
	Collateralized debt obligation		—		—		329			176		329		176
	Total	$	476,045	$	5,066	$	329		$	176	$	476,374	$	5,242
	Held-to-maturity:
U.S. Government agencies	$	14,885	$	307	$	—		$	—	$	14,885	$	307
State and political subdivisions—tax exempt		7,656		27		—			—		7,656		27
State and political subdivisions—taxable		541		6		—			—		541		6
Mortgage-backed securities—residential issued by government sponsored entities		81,712		797		—			—		81,712		797
Total	$	104,794	$	1,137	$	—		$	—	$	104,794	$	1,137
(Dollars in thousands)	Less than 12 Months				12 Months or Longer					Total
December 31, 2012	Estimated Fair		Unrealized		Estimated Fair			Unrealized		Estimated Fair		Unrealized
	Value		Losses		Value			Losses		Value		Losses
Available-for-sale:
Marketable equity securities	$	988	$	12	$	—		$	—	$	988	$	12
Mortgage-backed securities—residential issued by government sponsored entities		247,515		846		21,221			212		268,736		1,058
Trust preferred securities		246		4		—			—		246		4
Collateralized debt obligation		—		—		297			208		297		208
Total	$	248,749	$	862	$	21,518		$	420	$	270,267	$	1,282
There was no investment securities held-to-maturity at December 31, 2012.
The table below presents a rollforward for the three and nine months ended September 30, 2013 and 2012 of the other than temporary impairment credit losses recognized in earnings.
(Dollars in thousands)	Three Months		Three Months		Nine Months			Nine Months
	Ended		Ended		Ended			Ended
	September 30, 2013		September 30, 2012		September 30, 2013			September 30, 2012
Beginning balance	$	660	$	660	$	660		$	616
Additions/subtractions:
Credit losses recognized during the period		54		—		54			44
Ending balance	$	714	$	660	$	714		$	660
The Company owns shares of an investment fund with the principal investment strategy to invest in debt securities and other debt instruments that will cause shares of the fund to be deemed qualified under the Community Reinvestment Act (the “CRA”), so that financial institutions that are subject to the CRA may receive investment test or similar credit under the CRA with respect to shares of the Fund held by them. Valuation and measurement of OTTI of this investment falls under ASC 320-10-S991, Other Than Temporary Impairment of Certain Investments in Equity Securities. The Company evaluates the intent and ability to hold for any anticipated recovery in fair value and the length of time and extent to which the fair value has been less than cost.
Based on the extended period the security fair value has been less than cost, and market information that indicates the prospects for recovery in the near-term are unlikely, the Company determined there to be OTTI as of September 30, 2013. The Company recognized $54 thousand of impairment loss in earnings, equal to the entire difference between the security’s cost basis and its fair value.
The Company owns a collateralized debt obligation (“CDO”) collateralized by trust preferred securities issued primarily by banks and several insurance companies. Valuation and measurement of other-than-temporary impairment (“OTTI”) of this investment falls under ASC 325-40, Beneficial Interests in Securitized Financial Assets. The Company compares the present value of expected cash flows to the previous estimate to ensure there are no adverse changes in the expected cash flows which would require the recognition of impairment. The Company utilizes a discounted cash flow valuation model which considers the structure and term of the CDO and the financial condition of the underlying issuers. Specifically, the model details interest rates, principal balances of note classes and underlying issuers, the timing and amount of interest and principal payments of the underlying issuers, and the allocation of the payments to the note classes. The current estimate of expected cash flows is based on the most recent trustee reports and any other relevant market information including announcements of interest payment deferrals or defaults by issuers of the underlying trust preferred securities. Assumptions used in the model include expected future default rates. Interest payment deferrals are generally treated as defaults even though they may not actually result in defaults.
Based on this analysis, the estimated fair value of the CDO increased by $32 thousand during the nine months ended September 30, 2013. In addition, the credit loss potential of the CDO declined. Since previous credit impairment was recognized, no recovery is allowed under U.S. GAAP. The CDO was recorded at fair value and the remaining unrealized loss was recognized as a component of accumulated other comprehensive income.
As of September 30, 2013, the Company’s security portfolio consisted of 139 securities, 60 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, 2013 and December 31, 2012 were issued by U.S. government-sponsored entities and agencies, institutions 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 not more likely than not that it will 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, 2013, or December 31, 2012.
Investment securities having carrying values of approximately $303.0 million at September 30, 2013 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, 2013
Receivables [Abstract]	'
Loans	'
	5. Loans
	Major classifications of loans, including loans held for sale, are as follows:
	(Dollars in thousands)		September 30, 2013			December 31, 2012
	Non-owner occupied commercial real estate		$	803,954		$	904,215
	Other commercial construction and land			326,040			415,969
	Multifamily commercial real estate			72,627			84,838
	1-4 family residential construction and land			76,013			91,680
	Total commercial real estate			1,278,634			1,496,702
	Owner occupied commercial real estate			1,052,994			1,065,900
	Commercial and industrial loans			681,882			665,507
	Lease financing			2,554			—
	Total commercial			1,737,430			1,731,407
	1-4 family residential			816,915			838,557
	Home equity loans			386,071			430,887
	Other consumer loans			158,452			136,806
	Total consumer			1,361,438			1,406,250
	Other (1)			99,778			101,131
	Total loans		$	4,477,280		$	4,735,490
	-1	Other loans include $45.7 million and $27.0 million and $45.3 million and $26.0 million of farm land and agricultural and state and political subdivision obligations as of September 30, 2013 and December 31, 2012, respectively.
	Total loans as of September 30, 2013 and December 31, 2012, include $8.9 million and $11.3 million of 1-4 family residential loans held for sale and $3.1 million and $0.7 million of deferred loan origination costs, 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 by the Company and loans acquired through the purchase of CBKN, GRNB, SCMF and TIBB are not subject to the loss sharing agreements and are classified as “none covered.” Additionally, certain consumer loans acquired through the acquisitions of First National Bank in Spartanburg, South Carolina, Metro Bank in Miami, Florida and Turnberry Bank in Aventura, Florida (collectively, the “Failed Banks”) from the FDIC are specifically excluded from the loss sharing agreements.
	The Company designates loans as PCI loans by evaluating both qualitative and quantitative factors. The loans are analyzed by taking into account the individual loan risk rating assigned by the Company along with an understanding of the credit underwriting and monitoring practices of the originating institution as well as loan level data available regarding credit risk, such as delinquency status, origination vintage, accrual and charge off history.
	Loans acquired are recorded at fair value in accordance with acquisition accounting, exclusive of any loss share agreements with the FDIC. The fair value estimates associated with the loans include estimates related to expected prepayments and the amount and timing of undiscounted expected principal, interest and other cash flows adjusted for expected credit losses and interest rate fluctuations. At the time of acquisition, the Company accounted for the PCI loans by segregating each portfolio into loan pools with similar risk characteristics, which included:
		•		The loan type based on regulatory reporting guidelines, namely whether the loan was a mortgage, consumer, or commercial loan;
		•		The nature of collateral; and
		•		The relative credit risk of the loan on performance.
	From these pools, the Company uses certain loan information, including outstanding principal balance, estimated expected losses, weighted average maturity, weighted average term to re-price (if a variable rate loan), weighted average margin, and weighted average interest rate to estimate the expected cash flow for each loan pool. Over the lives of the acquired 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 rollforward of accretable yield and income expected to be earned related to purchased credit-impaired loans:
	(Dollars in thousands)		Three Months Ended			Three Months Ended			Nine Months Ended			Nine Months Ended
			September 30, 2013			September 30, 2012			September 30, 2013			September 30, 2012
	Balance, beginning of period		$	444,481		$	609,993		$	553,348		$	715,479
	New loans purchased			—			—			—			—
	Accretion of income			(39,625	)		(43,927	)		(126,634	)		(142,024	)
	Reclassifications from nonaccretable difference			15,018			19,134			46,117			76,697
	Disposals			(21,459	)		(35,160	)		(74,416	)		(100,112	)
	Balance, end of period		$	398,415		$	550,040		$	398,415		$	550,040
	As a result of the measurement period adjustment discussed in Note 3. Business Combinations and Acquisitions, the beginning of period balance and accretion of income was impacted by $1.0 million and $0.9 million, respectively, for the three months ended June 30, 2013 and $0.3 million and $1.1 million, respectively, for the six months ended June 30, 2013. Nonaccretable difference represents contractually required payments in excess of the amount of estimated cash flows expected to be collected. The accretable yield represents the excess of estimated cash flows expected to be collected over the initial fair value of the PCI loans. Disposals represent reductions of accretable yield due to non-credit events such as interest rate reductions on variable rate loans and prepayment activity on loans.
	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 CBF covered loans and foreclosed real estate are significantly different from those assets not covered under the loss share agreement. Refer to Note 8 – Other Real Estate Owned, for the covered and non-covered balances of other real estate owned.
	As a result of overall improvement of credit loss expectations in our most recent estimates of cash flows, substantially related to the Company’s legacy Green Bankshares and Southern Community portfolios, the Company recognized $(0.8) million in CVR income and a $2.5 million expense for the three and nine months ended September 30, 2013, respectively.
	Non-covered Loans
	The following is a summary of the major categories of non-covered loans outstanding as of September 30, 2013 and December 31, 2012:
	(Dollars in thousands)
	September 30, 2013		PCI Loans			Non-PCI			Total
						Loans			Non-covered
									Loans
	Non-owner occupied commercial real estate		$	476,248		$	260,773		$	737,021
	Other commercial C&D			240,931			64,490			305,421
	Multifamily commercial real estate			36,040			26,150			62,190
	1-4 family residential C&D			18,079			57,934			76,013
	Total commercial real estate			771,298			409,347			1,180,645
	Owner occupied commercial real estate			321,684			657,677			979,361
	Commercial and industrial			140,800			530,111			670,911
	Lease financing			—			2,554			2,554
	Total commercial			462,484			1,190,342			1,652,826
	1-4 family residential			374,519			364,549			739,068
	Home equity			104,927			227,959			332,886
	Consumer			14,754			143,629			158,383
	Total consumer			494,200			736,137			1,230,337
Other			48,217			50,530			98,747
Total		$	1,776,199		$	2,386,356		$	4,162,555
(Dollars in thousands)
December 31, 2012		PCI Loans			Non-PCI			Total
					Loans			Non-covered
								Loans
Non-owner occupied commercial real estate		$	628,234		$	181,009		$	809,243
Other commercial C&D			328,280			55,967			384,247
Multifamily commercial real estate			46,146			27,078			73,224
1-4 family residential C&D			45,305			42,208			87,513
Total commercial real estate			1,047,965			306,262			1,354,227
Owner occupied commercial real estate			425,869			556,025			981,894
Commercial and industrial			194,481			453,969			648,450
Leasing			—			—			—
Total commercial			620,350			1,009,994			1,630,344
1-4 family residential			486,122			260,622			746,744
Home equity			129,967			240,810			370,777
Consumer			28,109			108,512			136,621
Total consumer			644,198			609,944			1,254,142
Other			56,287			40,480			96,767
Total		$	2,368,800		$	1,966,680		$	4,335,480
Covered Loans
The following is a summary of the major categories of covered loans outstanding as of September 30, 2013 and December 31, 2012:
(Dollars in thousands)
September 30, 2013		PCI Loans			Non-PCI			Total Covered
					Loans			Loans
Non-owner occupied commercial real estate		$	66,933		$	—		$	66,933
Other commercial C&D			20,619			—			20,619
Multifamily commercial real estate			10,437			—			10,437
1-4 family residential C&D			—			—			—
Total commercial real estate			97,989			—			97,989
Owner occupied commercial real estate			73,633			—			73,633
Commercial and industrial			10,612			359			10,971
Leasing			—			—			—
Total commercial			84,245			359			84,604
1-4 family residential			77,055			792			77,847
Home equity			16,038			37,147			53,185
Consumer			69			—			69
Total consumer			93,162			37,939			131,101
Other			1,031			—			1,031
Total		$	276,427		$	38,298		$	314,725
(Dollars in thousands)
December 31, 2012		PCI Loans			Non-PCI			Total Covered
					Loans			Loans
Non-owner occupied commercial real estate		$	94,916		$	56		$	94,972
Other commercial C&D			31,722			—			31,722
Multifamily commercial real estate			11,614			—			11,614
1-4 family residential C&D			4,167			—			4,167
Total commercial real estate			142,419			56			142,475
Owner occupied commercial real estate			84,006			—			84,006
Commercial and industrial			16,451			606			17,057
Leasing			—			—			—
Total commercial			100,457			606			101,063
1-4 family residential			91,586			227			91,813
Home equity			16,823			43,287			60,110
Consumer			185			—			185
Total consumer			108,594			43,514			152,108
Other			4,364			—			4,364
Total		$	355,834		$	44,176		$	400,010
The following tables present the aging of the recorded investment in past due loans, based on contractual terms, as of September 30, 2013 by class of loans:
(Dollars in thousands)
Non-purchased credit impaired loans		30-89 Days Past Due						Greater than 90 Days						Nonaccrual				Total
								Past Due and Still
								Accruing/Accreting
		Covered			Non-Covered			Covered			Non-Covered			Covered		Non-Covered
Non-owner occupied commercial real estate		$	—		$	201		$	—		$	—		$	—	$	94	$	295
Other commercial C&D			—			150			—			—			—		441		591
Multifamily commercial real estate			—			—			—			—			—		—		—
1-4 family residential C&D			—			—			—			—			—		2,581		2,581
Total commercial real estate			—			351			—			—			—		3,116		3,467
Owner occupied commercial real estate			—			173			—			—			—		2,252		2,425
Commercial and industrial			—			12			—			—			66		2,512		2,590
Lease financing			—			—			—			—			—		—		—
Total commercial			—			185			—			—			66		4,764		5,015
1-4 family residential			—			814			—			—			—		952		1,766
Home equity			402			731			—			—			1,190		2,919		5,242
Consumer			—			1,452			—			—			—		805		2,257
Total consumer			402			2,997			—			—			1,190		4,676		9,265
Other			—			—			—			—			—		11		11
Total		$	402		$	3,533		$	—		$	—		$	1,256	$	12,567	$	17,758
(Dollars in thousands)
Purchased credit impaired loans		30-89 Days Past Due						Greater than 90 Day						Nonaccrual				Total
								Past Due and Still
								Accruing/Accreting
		Covered			Non-Covered			Covered			Non-Covered			Covered		Non-Covered
Non-owner occupied commercial real estate		$	243		$	4,847		$	12,199		$	42,040		$	—	$	—	$	59,329
Other commercial C&D			—			5,631			10,313			60,915			—		—		76,859
Multifamily commercial real estate			—			119			957			3,378			—		—		4,454
1-4 family residential C&D			—			10			—			3,041			—		—		3,051
Total commercial real estate			243			10,607			23,469			109,374			—		—		143,693
Owner occupied commercial real estate			247			3,353			4,870			37,136			—		—		45,606
Commercial and industrial			—			4,068			167			22,784			—		—		27,019
Lease financing			—			—			—			—			—		—		—
Total commercial			247			7,421			5,037			59,920			—		—		72,625
1-4 family residential			374			8,010			10,643			41,008			—		—		60,035
Home equity			39			1,602			1,821			6,711			—		—		10,173
Consumer			—			512			33			380			—		—		925
Total consumer			413			10,124			12,497			48,099			—		—		71,133
Other			—			438			5			3,069			—		—		3,512
Total		$	903		$	28,590		$	41,008		$	220,462		$	—	$	—	$	290,963
The following tables present the aging of the recorded investment in past due loans, based on contractual terms, as of December 31, 2012 by class of loans:
(Dollars in thousands)
Non-purchased credit impaired loans		30-89 Days Past Due						Greater than 90 Days						Nonaccrual				Total
								Past Due and Still
								Accruing/Accreting
		Covered			Non-Covered			Covered			Non-Covered			Covered		Non-Covered
Non-owner occupied commercial real estate		$	—		$	—		$	—		$	—		$	56	$	24	$	80
Other commercial C&D			—			—			—			—			—		97		97
Multifamily commercial real estate			—			—			—			—			—		—		—
1-4 family residential C&D			—			474			—			—			—		363		837
Total commercial real estate			—			474			—			—			56		484		1,014
Owner occupied commercial real estate			—			405			—			—			—		1,966		2,371
Commercial and industrial			—			608			—			—			276		2,057		2,941
Leasing			—			—			—			—			—		—		—
Total commercial			—			1,013			—			—			276		4,023		5,312
1-4 family residential			—			1,648			—			—			—		3,731		5,379
Home equity			1,614			1,416			—			—			2,460		2,613		8,103
Consumer			—			1,873			—			—			—		368		2,241
Total consumer			1,614			4,937			—			—			2,460		6,712		15,723
Other			—			49			—			—			—		—		49
Total		$	1,614		$	6,473		$	—		$	—		$	2,792	$	11,219	$	22,098
(Dollars in thousands)
Purchased credit impaired loans		30-89 Days Past Due						Greater than 90 Days						Nonaccrual				Total
								Past Due and Still
								Accruing/Accreting
		Covered			Non-Covered			Covered			Non-Covered			Covered		Non-Covered
Non-owner occupied commercial real estate		$	2,799		$	4,662		$	17,286		$	44,917		$	—	$	—	$	69,664
Other commercial C&D			135			7,183			21,659			84,189			—		—		113,166
Multifamily commercial real estate			—			194			3,612			2,755			—		—		6,561
1-4 family residential C&D			—			2,405			3,482			5,145			—		—		11,032
Total commercial real estate			2,934			14,444			46,039			137,006			—		—		200,423
Owner occupied commercial real estate			873			4,210			7,646			54,971			—		—		67,700
Commercial and industrial			99			3,921			2,045			32,007			—		—		38,072
Leasing			—			—			—			—			—		—		—
Total commercial			972			8,131			9,691			86,978			—		—		105,772
1-4 family residential			1,214			15,550			13,685			41,905			—		—		72,354
Home equity			345			4,224			3,024			10,247			—		—		17,840
Consumer			1			1,213			—			493			—		—		1,707
Total consumer			1,560			20,987			16,709			52,645			—		—		91,901
Other			—			2,918			1,014			1,988			—		—		5,920
Total		$	5,466		$	46,480		$	73,453		$	278,617		$	—	$	—	$	404,016
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 on a monthly basis. 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 purchased credit-impaired loans, monitored for credit quality based on internal ratings at September 30, 2013:
								Substandard
(Dollars in thousands)		Pass			Special			Accruing/			Nonaccrual			Doubtful		Total
					Mention			Accreting
Non-owner occupied commercial real estate		$	259,151		$	644		$	884		$	94		$	—	$	260,773
Other commercial C&D			63,233			666			150			441			—		64,490
Multifamily commercial real estate			25,842			—			308			—			—		26,150
1-4 family residential C&D			50,810			1,565			2,978			2,581			—		57,934
Total commercial real estate			399,036			2,875			4,320			3,116			—		409,347
Owner occupied commercial real estate			653,194			—			2,231			2,252			—		657,677
Commercial and industrial			519,704			5,408			2,780			2,578			—		530,470
Lease financing			2,554			—			—			—			—		2,554
Total commercial			1,175,452			5,408			5,011			4,830			—		1,190,701
1-4 family residential			364,359			30			—			952			—		365,341
Home equity			258,591			237			2,169			4,109			—		265,106
Consumer			142,793			—			31			805			—		143,629
Total consumer			765,743			267			2,200			5,866			—		774,076
Other			50,245			—			274			11			—		50,530
Total		$	2,390,476		$	8,550		$	11,805		$	13,823		$	—	$	2,424,654
The following table summarizes loans, excluding purchased credit-impaired loans, monitored for credit quality based on internal ratings at December 31, 2012:
								Substandard
		Pass			Special			Accruing/			Nonaccrual			Doubtful		Total
					Mention			Accreting
Non-owner occupied commercial real estate		$	180,080		$	—		$	905		$	80		$	—	$	181,065
Other commercial C&D			55,394			325			150			98			—		55,967
Multifamily commercial real estate			26,760			—			318			—			—		27,078
1-4 family residential C&D			39,026			160			2,659			363			—		42,208
Total commercial real estate			301,260			485			4,032			541			—		306,318
Owner occupied commercial real estate			548,506			2,953			2,600			1,966			—		556,025
Commercial and industrial			437,904			1,470			12,868			2,333			—		454,575
Leasing			—			—			—			—			—		—
Total commercial			986,410			4,423			15,468			4,299			—		1,010,600
1-4 family residential			256,805			313			—			3,731			—		260,849
Home equity			274,827			777			3,420			5,073			—		284,097
Consumer			107,924			110			111			367			—		108,512
Total consumer			639,556			1,200			3,531			9,171			—		653,458
Other			40,431			49			—			—			—		40,480
Total		$	1,967,657		$	6,157		$	23,031		$	14,011		$	—	$	2,010,856

Allowance_for_Loan_Losses

Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Allowance for Loan Losses	'
	6. Allowance for Loan Losses
	Activity in the allowance for loan losses for the three and nine months ended September 30, 2013 and 2012 is as follows:
	(Dollars in thousands)		Three Months			Three Months			Nine Months			Nine Months
			Ended September  30,			Ended September  30,			Ended September  30,			Ended September  30,
			2013			2012			2013			2012
	Balance, beginning of period		$	56,832		$	45,472		$	57,262		$	34,749
	Provision (Reversal) for loan losses on PCI loans			(72	)		4,698			(703	)		12,050
	Provision for loan losses on non-PCI loans			1,056			1,073			11,556			5,705
	PCI loans charged off			—			—			—			—
	Non PCI loans charged off			(1,945	)		(824	)		(15,335	)		(3,690	)
	Recoveries of PCI loans previously charged off			—			—			—			—
	Recoveries of non-PCI loans previously charged off			522			1,168			3,613			2,773
	Balance, end of period		$	56,393		$	51,587		$	56,393		$	51,587
	The following table presents the roll forward of the allowance for loan losses for the three months ended September 30, 2013 by the class of loans against which the allowance is allocated:
	(Dollars in thousands)		June 30,			Provision /			Net  (Charge-			September 30,
			2013			(Reversals)			offs)/Recoveries			2013
	Non-owner occupied commercial real estate		$	4,329		$	2,344		$	11		$	6,684
	Other commercial C&D			12,310			(1,201	)		85			11,194
	Multifamily commercial real estate			258			44			—			302
	1-4 family residential C&D			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			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			3,937			(40	)		(120	)		3,777
	Consumer			2,361			734			(565	)		2,530
	Total consumer			23,870			(346	)		(634	)		22,890
	Other			1,275			(306	)		(438	)		531
	Total		$	56,832		$	984		$	(1,423	)	$	56,393
	The following table presents the roll forward of the allowance for loan losses for the nine months ended September 30, 2013 by the class of loans against which the allowance is allocated:
	(Dollars in thousands)		December 31,			Provision /			Net (Charge-			September 30,
			2012			(Reversals)			offs)/Recoveries			2013
	Non-owner occupied commercial real estate		$	3,764		$	2,936		$	(16	)	$	6,684
	Other commercial C&D			12,711			(2,120	)		603			11,194
	Multifamily commercial real estate			348			(87	)		41			302
	1-4 family residential C&D			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			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			8,670			(3,861	)		(1,032	)		3,777
	Consumer			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		$	57,262		$	10,853		$	(11,722	)	$	56,393
	The following table presents the roll forward of the allowance for loan losses for the three months ended September 30, 2012 by the class of loans against which the allowance is allocated:
	(Dollars in thousands)		June 30,			Provision /			Net  (Charge-			September 30,
			2012			(Reversals)			offs)/Recoveries			2012
	Non-owner occupied commercial real estate		$	2,154		$	1,434		$	4		$	3,592
	Other commercial C&D			10,944			2,004			278			13,226
	Multifamily commercial real estate			210			(25	)		—			185
	1-4 family residential C&D			1,265			529			1			1,795
	Total commercial real estate			14,573			3,942			283			18,798
	Owner occupied commercial real estate			4,783			(1,126	)		237			3,894
	Commercial and industrial			4,724			1,669			(14	)		6,379
	Leasing			—			—			—			—
	Total commercial			9,507			543			223			10,273
	1-4 family residential			12,050			1,554			35			13,639
	Home equity			6,998			(4	)		(469	)		6,525
Consumer			1,736			631			(406	)		1,961
Total consumer			20,784			2,181			(840	)		22,125
Other			608			(895	)		678			391
Total		$	45,472		$	5,771		$	344		$	51,587
The following table presents the roll forward of the allowance for loan losses for the nine months ended September 30, 2012 by the class of loans against which the allowance is allocated:
(Dollars in thousands)		December 31,			Provision /			Net  (Charge-			September 30,
		2011			(Reversals)			offs)/Recoveries			2012
Non-owner occupied commercial real estate		$	3,854		$	(1,028	)	$	766		$	3,592
Other commercial C&D			7,627			5,354			245			13,226
Multifamily commercial real estate			398			(213	)		—			185
1-4 family residential C&D			921			873			1			1,795
Total commercial real estate			12,800			4,986			1,012			18,798
Owner occupied commercial real estate			5,454			(1,811	)		251			3,894
Commercial and industrial			4,166			2,081			132			6,379
Leasing			—			—			—			—
Total commercial			9,620			270			383			10,273
1-4 family residential			7,252			6,304			83			13,639
Home equity			2,711			5,016			(1,202	)		6,525
Consumer			1,594			1,121			(754	)		1,961
Total consumer			11,557			12,441			(1,873	)		22,125
Other			772			58			(439	)		391
Total		$	34,749		$	17,755		$	(917	)	$	51,587
The following table presents the balance in the allowance for loan losses and the recorded investment in loans by class of loans and by impairment evaluation method as of September 30, 2013:
		Allowance for Loan Losses									Loans
(Dollars in thousands)		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		$	—		$	1,399		$	5,285		$	—		$	260,773	$	543,181
Other commercial C&D			—			1,644			9,550			—			64,490		261,550
Multifamily commercial real estate			—			109			193			—			26,150		46,477
1-4 family residential C&D			—			1,115			1,046			—			57,934		18,079
Total commercial real estate			—			4,267			16,074			—			409,347		869,287
Owner occupied commercial real estate			—			2,572			2,498			—			657,677		395,317
Commercial and industrial			64			5,266			2,228			2,318			528,152		151,412
Lease financing			—			3			—			—			2,554		—
Total commercial			64			7,841			4,726			2,318			1,188,383		546,729
1-4 family residential			—			2,217			14,366			—			356,423		451,574
Home equity			—			358			3,419			—			265,106		120,965
Consumer			1			2,152			377			15			143,614		14,823
Total consumer			1			4,727			18,162			15			765,143		587,362
Other			—			376			155			—			50,530		49,248
Total		$	65		$	17,211		$	39,117		$	2,333		$	2,413,403	$	2,052,626
-1	Loans collectively evaluated for impairment include $459.5 million of acquired loans which are presented net of unamortized purchase discounts of $12.1 million.
The following table presents the balance in the allowance for loan losses and the recorded investment in loans by class of loans and by impairment evaluation method as of December 31, 2012:
		Allowance for Loan Losses									Loans
(Dollars in thousands)		Individually			Collectively			Purchased			Individually			Collectively		Purchased
		Evaluated			Evaluated			Credit-			Evaluated			Evaluated		Credit-
		for			for			Impaired			for			for		Impaired
		Impairment			Impairment						Impairment			Impairment (2)
Non-owner occupied commercial real estate		$	—		$	1,461		$	2,303		$	—		$	181,065	$	723,150
Other commercial C&D			—			1,810			10,901			—			55,967		360,002
Multifamily commercial real estate			—			129			219			—			27,078		57,760
1-4 family residential C&D			—			943			773			—			42,208		49,472
Total commercial real estate			—			4,343			14,196			—			306,318		1,190,384
Owner occupied commercial real estate			38			2,905			1,112			1,756			554,269		509,875
Commercial and industrial			—			5,920			1,570			—			454,575		210,932
Leasing			—			—			—			—			—		—
Total commercial			38			8,825			2,682			1,756			1,008,844		720,807
1-4 family residential			—			1,915			13,825			3,153			246,420		577,708
Home equity			—			376			8,294						284,097		146,790
Consumer			—			1,568			514			—			108,512		28,294
Total consumer			—			3,859			22,633			3,153			639,029		752,792
Other			—			377			309			—			40,480		60,651
Total		$	38		$	17,404		$	39,820		$	4,909		$	1,994,671	$	2,724,634
Troubled Debt Restructurings
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 loans 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, 2013, consumer loans modified in a TDR 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, 2013. The Company did not have loans modified in a TDR during the three and nine months ended September 30, 2012.

FDIC_Indemnification_Asset

FDIC Indemnification Asset	9 Months Ended
	Sep. 30, 2013
Text Block [Abstract]	'
FDIC Indemnification Asset	'
	7. FDIC Indemnification Asset
	The Company has recorded an indemnification asset related to loss share 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 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, 2012	$	49,417
	Indemnification asset income		2,003
	Amortization on indemnification asset		(5,782	)
	Reimbursable losses claimed		(8,801	)
	Balance, September 30, 2013	$	36,837
	Balance, December 31, 2011	$	66,282
	Indemnification asset income		7,850
	Amortization on indemnification asset		(6,842	)
	Reimbursable losses claimed		(10,746	)
	Balance, September 30, 2012	$	56,544

Other_Real_Estate_Owned

Other Real Estate Owned	9 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Other Real Estate Owned	'
	8. Other Real Estate Owned
	The activity within Other Real Estate Owned (“OREO”) for the three and nine months ended September 30, 2013 and 2012 is presented in the table below. Ending balances for OREO covered by loss sharing agreements with the FDIC as of September 30, 2013 and 2012 were $27.3 million and $39.6 million, respectively. Non-covered OREO ending balances as of September 30, 2013 and 2012 were $102.4 million and $105.0 million, respectively.
	(Dollars in thousands)	Three Months Ended			Three Months Ended			Nine Months Ended			Nine Months Ended
		September  30, 2013			September  30, 2012			September  30, 2013			September  30, 2012
	Balance, beginning of period	$	142,793		$	158,235		$	154,093		$	168,781
	Real estate acquired from borrowers		10,585			23,233			53,366			65,530
	Valuation expense		(6,045	)		(8,633	)		(18,844	)		(15,529	)
	(Loss) gain on sale of properties		(188	)		1,514			3,204			3,937
	Properties sold and other		(17,491	)		(29,728	)		(62,165	)		(78,098	)
	Balance, end of period	$	129,654		$	144,621		$	129,654		$	144,621

Federal_Home_Loan_Bank_Advance

Federal Home Loan Bank Advances and Short-Term Borrowings

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

'

Federal Home Loan Bank Advances and Short-Term Borrowings

'

9. Federal Home Loan Bank Advances and Short-Term Borrowings

Short-term borrowings include federal funds purchased, 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 issued by the United States Government or its agencies which are chosen by the Bank. The amounts outstanding at September 30, 2013 and December 31, 2012 were $23.2 million and $41.5 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.

At September 30, 2013, in addition to $25.6 million in letters of credit issued by the FHLB, of which $25.2 million is used in lieu of pledging securities to the State of Florida, the Bank had $1.3 million in advances outstanding.

The advances as of September 30, 2013 consisted of the following:

(Dollars in thousands)

Contractual

Maturity Date

Repricing

Contractual

Outstanding

Frequency

Rate at

Amount

September 30,

2013

$

760

November 2017

Fixed

0.5

%

564

Feb-26

Fixed

0

%

$

1,324

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 amount of eligible collateral at September 30, 2013 provided for incremental borrowing availability of up to $190.1 million.

At December 31, 2012, in addition to $25.5 million in letters of credit of which $25.2 million is used in lieu of pledging securities to the State of Florida, the Bank had $1.5 million in advances outstanding.

The advances as of December 31, 2012 consisted of the following:

(Dollars in thousands)

Contractual

Maturity Date

Repricing

Contractual

Outstanding

Frequency

Rate at

Amount

December 31,

2012

$

867

November 2017

Fixed

0.5

%

593

Feb-26

Fixed

0

%

$

1,460

Long_Term_Borrowings

Long Term Borrowings	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Long Term Borrowings	'
	10. Long Term Borrowings
	Structured repurchase agreements
	At September 30, 2013, outstanding structured repurchase agreements totaled $50.0 million of contractual amounts with carrying values of $53.7 million. These repurchase agreements have a weighted-average rate of 4.06% as of September 30, 2013 and are collateralized by $64.3 million of mortgage-backed securities.
	(Dollars in thousands)
	Carrying				Contractual				Maturity Date	Rate at
	Amount				Amount					September 30, 2013
	$	10,894			$	10,000			November 6, 2016		4.75	%
		10,521				10,000			18-Dec-17		3.72	%
		10,896				10,000			30-Mar-17		4.5	%
		10,552				10,000			December 18, 2017		3.79	%
		10,816				10,000			22-Mar-19		3.56	%
	$	53,679			$	50,000
	At December 31, 2012, outstanding structured repurchase agreements totaled $50.0 million of contractual amounts with carrying values of $54.4 million. These repurchase agreements have a weighted-average rate of 4.06% as of December 31, 2012 and are collateralized by $66.5 million of mortgage-backed securities.
	(Dollars in thousands)
	Carrying				Contractual				Maturity Date	Rate at
	Amount				Amount					December 31, 2012
	$	11,102			$	10,000			November 6, 2016		4.75	%
		10,608				10,000			18-Dec-17		3.72	%
		11,080				10,000			30-Mar-17		4.5	%
		10,644				10,000			December 18, 2017		3.79	%
		10,920				10,000			22-Mar-19		3.56	%
	$	54,354			$	50,000
	Subordinated Debentures
	Through its acquisitions of TIBB, CBKN, GRNB and SCMF, the Company assumed twelve 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 companies or the Trust, at their respective option after a period of time outlined below, 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 10.6%. The prepayment resulted in a $0.4 million gain on extinguishment of debt.
	(Dollars in thousands)
	Date of Offering		Original Face				Carrying			Carrying			Interest Rate	Call Date	Maturity
			Amount				Amount			Amount			As of September 30, 2013		Date
							September 30,			December 31,
							2013			2012
	September 7, 2000		$	8,000			$	—		$	8,762		—	September 7, 2010	September 7, 2030
	July 31, 2001			5,000				3,840			3,795		3.85% (3 Month LIBOR	July 31, 2006	July 31, 2031
													plus 358 basis points)
	July 31, 2001			4,000				2,620			2,573		3.85% (3 Month LIBOR	July 31, 2006	July 31, 2031
													plus 358 basis points)
	June 26, 2003			10,000				5,898			5,832		3.35% (3 Month LIBOR	26-Jun-08	26-Jun-33
													plus 310 basis points)
	September 25, 2003			10,000				6,331			6,222		3.12% (3 Month LIBOR	September 25, 2008	September 25, 2033
													plus 285 basis points)
	November 10, 2003			34,500				—			34,189		—	November 10, 2008	December 31, 2033
	December 30, 2003			10,000				5,681			5,614		3.12% (3 Month LIBOR	30-Dec-08	30-Dec-33
													plus 285 basis points)
	June 28, 2005			3,000				1,533			1,497		1.93% (3 Month LIBOR	June 28, 2010	June 28, 2035
													plus 168 basis points)
	December 22, 2005			10,000				4,463			4,383		1.65% (3 Month LIBOR	22-Dec-10	15-Mar-36
													plus 140 basis points)
	December 28, 2005			13,000				6,407			6,255		1.79% (3 Month LIBOR	28-Dec-10	15-Mar-36
													plus 154 basis points)
	June 23, 2006			20,000				11,137			10,918		1.82% (3 Month LIBOR	June 23, 2011	7-Jul-36
													plus 155 basis points)
	May 16, 2007			56,000				27,840			27,220		1.90% (3 Month LIBOR	16-May-12	16-May-37
													plus 165 basis points)
	June 15, 2007			10,000				5,302			5,243		1.69% (3 Month LIBOR	15-Jun-12	6-Sep-37
													plus 143 basis points)
			$	193,500			$	81,052		$	122,503
	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 $3.6 million as of September 30, 2013 and December 31, 2012. 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, 2013, 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			10,894				—			10,894
	Due in 2017			31,969				—			31,969
	Due in 2018			—				—			—
Thereafter			14,375				81,052			95,427
Total long-term debt		$	57,238			$	81,052		$	138,290
At December 31, 2012, the maturities of long-term borrowings were as follows:
(Dollars in thousands)		Fixed Rate				Floating Rate			Total
Due in 2013 through 2015		$	—			$	—		$	—
Due in 2016			11,102				—			11,102
Due in 2017			32,332				—			32,332
Thereafter			57,444				79,552			136,996
Total long-term debt		$	100,878			$	79,552		$	180,430

Shareholders_Equity_and_Minimu

Shareholders' Equity and Minimum Regulatory Capital Requirements	9 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Shareholders' Equity and Minimum Regulatory Capital Requirements	'
	11. 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, 2013 and December 31, 2012 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 as of September 30, 2013 and December 31, 2012 are presented in the following tables.
	(Dollars in thousands)	Well Capitalized					Adequately					Actual
		Requirement					Capitalized
							Requirement
	September 30, 2013	Amount		Ratio			Amount		Ratio			Amount		Ratio
	Tier 1 Capital (to Average Assets)
	Consolidated		N/A		N/A		³	$256,831	³	4.0	%	$	928,770		14.5	%
	Capital Bank, NA	³	$321,016	³	5	%	³	256,813	³	4	%		820,704		12.8	%
	Tier 1 Capital (to Risk Weighted Assets)
	Consolidated		N/A		N/A		³	$188,340	³	4	%	$	928,770		19.7	%
	Capital Bank, NA	³	$282,524	³	6	%	³	188,350	³	4	%		820,704		17.4	%
	Total Capital (to Risk Weighted Assets)
	Consolidated		N/A		N/A		³	$376,679	³	8	%	$	989,088		21	%
	Capital Bank, NA	³	$470,874	³	10.0	%	³	376,699	³	8	%		880,856		18.7	%
	(Dollars in thousands)	Well Capitalized					Adequately					Actual
		Requirement					Capitalized
							Requirement
	December 31, 2012	Amount		Ratio			Amount		Ratio			Amount		Ratio
	Tier 1 Capital (to Average Assets)
	Consolidated		N/A		N/A		³	$282,575	³	4.0	%	$	964,309		13.7	%
	Capital Bank, NA	³	$353,323	³	5	%	³	282,659	³	4	%		850,472		12	%
	Tier 1 Capital (to Risk Weighted Assets)
	Consolidated		N/A		N/A		³	$193,640	³	4	%	$	964,309		19.9	%
	Capital Bank, NA	³	$290,349	³	6	%	³	193,566	³	4	%		850,472		17.6	%
	Total Capital (to Risk Weighted Assets)
	Consolidated		N/A		N/A		³	$387,281	³	8	%	$	1,025,545		21.2	%
	Capital Bank, NA	³	$483,915	³	10.0	%	³	387,132	³	8	%		911,528		18.8	%
	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, 2013 and December 31, 2012, 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.
	Currently, the OCC Operating Agreement with Capital Bank, NA prohibited the Bank from paying a dividend for three years following the July 16, 2010 initial acquisition date. The agreement imposes other restrictions on Capital Bank, NA’s ability to pay dividends including requiring prior approval from the OCC before any distribution is made. On September 5, 2013, the OCC approved a dividend of $105.0 million to the Company by its subsidiary Capital Bank N.A.
	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.
	Share Repurchases
	On February 5, 2013, the Board of Directors authorized the repurchase of up to $50.0 million of the Company’s common stock. Stock repurchases may be made from time to time, on the open market or in privately negotiated transactions. The approved stock repurchase program does not obligate the Company to repurchase any particular amount of shares, and the program may be extended, modified, suspended, or discontinued at any time. During the six months ended June 30, 2013, the Company repurchased $50.0 million, or 2,839 common shares at an average price of $17.60 per share, completing the aforementioned stock repurchase plan.
	On September 16, 2013, the Board of Directors authorized the repurchase of up to an additional $100.0 million of the Company’s common stock. Stock repurchases may be made from time to time, on the open market or in privately negotiated transactions. The approved stock repurchase program does not obligate the Company to repurchase any particular amount of shares, and the program may be extended, modified, suspended, or discontinued at any time. During the three months ended September 30, 2013, the Company repurchased $12.9 million, or 600 common shares at an average price of $21.50 per share. The Company accounts for treasury stock using the cost method as a reduction of shareholders’ equity in the accompanying consolidated balance sheet and statement of changes in shareholders’ equity.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Stock-Based Compensation	'
	12. Stock-Based Compensation
	As of September 30, 2013, 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 effective December 22, 2009. The maximum number of shares of common stock of the Company that could have been optioned or awarded was 5,750 shares (limited to 10% of outstanding shares of common stock) of which up to 70% could have been granted pursuant to stock options and up to 30% could have been granted pursuant to restricted stock and restricted stock units. The 2010 Plan was replaced by the 2013 Plan and no further awards may be made pursuant to the 2010 Plan. Pursuant to the merger agreements, upon the June 2012 merger of TIBB, GRNB and CBKN with and into CBF, outstanding options to acquire TIBB, GRNB and CBKN stock automatically converted into options to purchase the Company’s stock as determined by the conversion ratio specified in the merger agreements, subject to the same terms and conditions as were applicable immediately prior to the mergers. The remaining 16 options that were formerly options to acquire TIBB, GRNB and CBKN stock have exercise prices ranging from $28.44 to $2,026.00 per share of the company common stock.
	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 is 2,639 shares. Awards under this plan may be made to any person selected by the Committee. No options or awards were granted under this plan during the three and nine months ended September 30, 2013.
	The following table summarizes the components and classification of stock-based compensation expense for the three and nine months ended September 30, 2013 and 2012.
	(Dollars in thousands)		Three Months Ended			Three Months Ended			Nine Months Ended		Nine Months Ended
			September 30, 2013			September 30, 2012			September 30, 2013		September 30, 2012
	Stock options		$	215		$	1,867		$	395	$	8,017
	Restricted stock			1,156			2,375			3,917		6,910
	Total stock-based compensation expense		$	1,371		$	4,242		$	4,312	$	14,927
	Salaries and employee benefits		$	1,371		$	3,907		$	4,312	$	13,930
	Other expense			—			335			—		997
	Total stock-based compensation expense		$	1,371		$	4,242		$	4,312	$	14,927
	The tax benefit related to stock-based compensation expense arising from restricted stock awards and non-qualified stock options was approximately $0.5 million and $1.7 million for the three months ended September 30, 2013 and 2012, respectively, and $1.7 million and $5.8 million for the nine months ended September 30, 2013 and 2012, respectively.
	Stock Options
	Under the 2010 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. Stock options granted during the nine months ended September 30, 2013 and 2012 vest over average service periods of approximately 2 years and 6 months, respectively
	The following table lists the various stock option grants from our 2010 Plan for the nine months ended September 30, 2013 and 2012:
	(Shares in thousands)
	Stock Option Grant		Number of Options			Exercise			Fair
			Granted			Price			Value
	May 21, 2013—Employees			264		$	18			6.52
	January 12, 2012—Employees			628		$	20			8.05
	The fair value of each option is estimated as of the date of 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 assumptions for the grants were developed based on ASC 718 and SEC guidance contained in Staff Accounting Bulletin (SAB) No. 107, “Share-Based Payment.”
	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 and 2012:
			Nine Months Ended			Nine Months Ended
			September  30, 2013			September  30, 2012
	Dividend yield			0	%		0	%
	Risk-free interest rate			1.016	%		0.91	%
	Expected option life			5.75 years			5.25 years
	Volatility			37	%		45	%
	Weighted average grant-date fair value of options granted		$	6.52		$	8.05
		•		The dividend yield assumption is consistent with management expectations of dividend distributions based upon the Company’s business plan. An increase in dividend yield will decrease stock compensation expense.
		•		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. An increase in the risk-free interest rate will increase stock compensation expense.
		•		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. An increase in the option life will increase stock compensation expense.
		•		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. An increase in the volatility will increase stock compensation expense.
	ASC 718 requires the recognition of stock-based compensation for the number of awards that are ultimately expected to vest. During the nine months ended September 30, 2013 and 2012, 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.
	The following table summarizes the stock option activity for the nine months ended September 30, 2013 and 2012:
	(Shares in thousands)		2013						2012
	(Shares in thousands)		Shares			Weighted			Shares		Weighted
						Average					Average
						Exercise Price					Exercise Price
						Per Share					Per Share
	Balance, January 1,			2,890		$	21.39			2,236	$	20
	Granted			264			18			628		20
	Exercised			—			—			—		—
	Expired or forfeited			21			113.8			—		—
	Balance, September 30,			3,133		$	20.5			2,864	$	20
	The weighted average remaining term for outstanding stock options was approximately 7 years at September 30, 2013. The aggregate intrinsic value at September 30, 2013 and 2012 was $6.6 million and $0 for stock options outstanding. The aggregate intrinsic value at September 30, 2013 and 2012 was $5.6 million and $0 for stock options exercisable. The intrinsic value for stock options is calculated based on the exercise price of the underlying awards and the market price of the Company’s common stock as of the reporting date. There were 2,879 and 1,432 options exercisable at September 30, 2013 and 2012, respectively.
	Options outstanding at September 30, 2013 were as follows:
	(Shares in thousands)		Outstanding Options								Exercisable Options
	Range of Exercise Prices		Number			Weighted			Weighted		Number		Weighted
						Average			Average				Average
						Remaining			Exercise Price				Exercise
						Contractual			Per Share				Price
						Life
	$18.00			253			9.64 years		$	18		—		—
	$20.00			2,864			6.68 years			20		2,864	$	20
	$28.44 - $2,026.00			16			3.89 years			153.63		15		159.68
	$20.00 - $2,026.00			3,133			6.91 years		$	20.5		2,879	$	20.71
	Options outstanding at December 31, 2012 were as follows:
	(Shares in thousands)		Outstanding Options								Exercisable Options
	Range of Exercise Prices		Number			Weighted			Weighted		Number		Weighted
						Average			Average				Average
Remaining						Exercise Price			Exercise
Contractual						Per Share			Price
Life
$20.00			2,864			7.42 years		$	20		2,550	$	20
$28.44 - $2,026.00			26			3.65 years			174.5		25		178.71
$20.00 - $2,026.00			2,890			7.39 years		$	21.39		2,575	$	21.55
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. Vesting for restricted shares granted to employees is based upon the performance of the Company’s common stock. The terms of the restricted stock awards granted to employees during 2012 provide for vesting upon the achievement of stock price goals as follows: (1) 33% at $25.00 per share; (2) 33% at $28.00 per share; and (3) 33% 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 following table lists the various restricted stock awards under our 2010 Plan for the nine months ended September 30, 2013 and 2012:
(Shares in thousands)
Date of Award		Number of Restricted  Stock			Price Per
		Awards			Share
May 21, 2013—Employees			4		$	18
January 1, 2012—Employees			307		$	19.84
The fair value of each restricted stock award granted to employees during the nine months ended September 30, 2013 was estimated to be equal to the closing stock price on the date of grant. The fair value of each restricted stock award granted to employees during the nine months ended September 30, 2013 was estimated as of the date of grant using a Monte Carlo approach based on Geometric Brownian Motion that simulated daily stock prices and the related consecutive 30 day average of the simulated stock price over a period of 10 years. The model projected the Company’s fair value of each vesting tranche of the restricted stock award from the mean or expected value from the 100,000 scenarios used.
The model described above requires the input of subjective assumptions that will usually have a significant impact on the fair value estimate. The following table summarizes the weighted average assumptions used to compute the grant-date fair value of restricted stock awards granted during the nine months ended September 30, 2013 and 2012.
		Nine Months Ended September 30, 2013			Nine Months Ended September 30, 2012
Grant date fair value of shares		$	18		$	19.84
Risk-free interest rate			Forward Treasury Curve			Forward Treasury Curve
Market risk premium			N/A			0	%
Volatility			N/A			45	%
Annual forfeiture estimate			N/A			0	%
Weighted average grant-date fair value of restricted stock awards granted		$	18		$	18.01
	•		The risk-free interest rate was developed using the U.S. Treasury yield curve for periods equal to the expected life of the options on the grant date. An increase in the risk-free interest rate will increase stock compensation expense.
	•		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. An increase in the volatility will increase stock compensation expense.
	•		An increase in the annual forfeiture estimate will decrease stock compensation expense.
The value of the restricted stock is being amortized on a straight-line basis over the implied service periods.
The following table summarizes unvested restricted stock activity for the nine months ended September 30, 2013 and 2012:
(Shares in thousands)		2013						2012
		Shares			Weighted			Shares		Weighted
					Average					Average
					Grant-Date					Grant-Date
					Fair Value Per					Fair Value Per
					Share					Share
Balance, January 1,			1,212		$	14.27			967	$	13.26
Granted			4			18			307		18.01
Vested			—			—			—		—
Expired or forfeited			—			—			—		—
Balance, September 30,			1,216		$	14.28			1,274	$	14.4

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	13. Income Taxes
	A reconciliation of income tax computed at applicable Federal statutory income tax rates to total income tax expense reported is as follows:
	(Dollars in thousands)	Three Months			Three Months			Nine Months			Nine Months
		Ended September  30,			Ended September  30,			Ended September  30,			Ended September  30,
		2013			2012			2013			2012
	Pretax income from continuing operations	$	20,419		$	5,460		$	46,736		$	25,808
	Income taxes computed at Federal statutory tax rate		7,147			1,911			16,358			9,033
	Effect of:
	State taxes (net of federal benefit)		784			214			1,795			1,012
	State statutory rate change		1,545			—			1,545			—
	Change in estimate of deductible loan losses		—			(33,975	)		—			(33,975	)
	CVR adjustment		(301	)		—			1,156			—
	Other, net		(200	)		(535	)		(756	)		(643	)
	Total income tax expense	$	8,975		$	(32,385	)	$	20,098		$	(24,573	)
	The net deferred tax assets as of September 30, 2013 and December 31, 2012 were $177.9 million and $183.2 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, management considered the following positive factors: projections of future operating results which forecast that the Company will continue to recognize pre-tax income on a consolidated basis; reductions in operating expenses have been achieved as evidenced by continued progress in reducing compensation expense, occupancy costs, and OREO expenses; the Company expects interest rates to rise in the future, which should have a favorable impact on our net interest income trend and overall return on assets. A negative factor that management considered was the significant losses incurred by the acquired institutions as a result of the severe recession and significant decline in real estate values in their local markets. In addition, Section 382 of the Internal Revenue Code limits the ability of the Company to utilize net operating losses and deduct built in losses for income tax purposes. The Company appropriately considers these limitations and has taken into account such limitations in calculating the amount of the recorded net deferred tax assets. These factors represent the most significant positive and negative evidence that management considered in concluding that no valuation allowance was necessary at September 30, 2013 and December 31, 2012.
	The Company uses the estimated annual effective tax rate method in computing its interim tax provision. Certain items, including, those deemed to be unusual, infrequent or which cannot be reliably estimated, are excluded from the estimated annual effective tax rate. In these cases, the actual tax expense or benefit applicable to that item is treated discretely, and is reported in the same period as the related item. For the nine months ended September 30, 2013, the change in value of the CVR and related expense resulted from the overall improvement in our most recent estimates of cash flows, substantially related to the Company’s legacy GreenBankshares and Southern Community portfolios. This expense is not deductible for income tax purposes and was treated discretely as described above.
	At September 30, 2013 and December 31, 2012, the Company had $94.1 million and $98.2 million of gross Federal and state net operating loss carryforwards, respectively, which begin to expire after 2029 if unused and are subject to an annual limitation of $10.9 million.
	The Company and its subsidiaries are subject to U.S. federal income tax, as well as income tax of the states of Florida, South Carolina, North Carolina, Tennessee, and Virginia. During the three months ended September 30, 2013, a new North Carolina law was enacted which reduces the North Carolina income tax rate to 6% in 2014 and 5% in 2015. Under GAAP rules, the effects of a change in tax law or rates must be recognized in the period that includes the enactment date. As such, during the three months ended September 30, 2013, the Company recorded a $1.6 million charge to income tax expense as a result of the reduction in blended tax rate that caused the Company to revalue its deferred tax assets.
	At September 30, 2013 and December 31, 2012, the Company had no amounts recorded for uncertain tax positions.

Fair_Value

Fair Value	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value	'
	14. 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 interest rate swaps, foreign exchange contracts, option agreements, forward loan sales agreements and interest rate caps 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 collateralized debt obligations and certain corporate debt securities that are not actively traded, custom discounted cash flow modeling (Level 3 inputs).
	As of September 30, 2013, the Company owned a collateralized debt security where the underlying collateral is comprised primarily of trust preferred securities of banks and insurance companies and certain corporate debt securities which are not actively traded. The inputs used in determining the estimated fair value of these securities are Level 3 inputs. In determining their estimated fair value, management utilizes a discounted cash flow modeling valuation approach. Discount rates utilized in the modeling of these securities are estimated based upon a variety of factors including the market yields of publicly traded trust preferred securities of larger financial institutions and other non-investment grade corporate debt. Additionally, cash flows utilized in the modeling of the collateralized debt obligation security were based upon actual default history of the underlying issuers and issuer specific assumptions of estimated future defaults of the underlying issuers.
	As of September 30, 2013, 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.
	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, the Company owned a collateralized debt security, corporate bonds, and an Industrial Revenue bond 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 publicly traded trust preferred securities of larger financial institutions and other non-investment grade corporate debt. Cash flows utilized in the modeling of the collateralized debt security were based upon actual default history of the underlying issuers and issuer specific assumptions of estimated future defaults of the underlying issuers. 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, 2013:
					Fair Value Measurements Using
	(Dollars in thousands)	Total			Quoted Prices in			Significant				Significant
					Active Markets			Other Observable				Unobservable
					for Identical			Inputs				Inputs
					Assets			(Level 2)				(Level 3)
					(Level 1)
	Assets
	Trading securities	$	6,091		$	6,091		$	—			$	—
	Available for sale securities:
	Asset-backed securities		137,961			—			137,961				—
	Mortgage-backed securities—residential		574,401			—			574,401				—
	Industrial revenue bonds		3,965			—			—				3,965
	Marketable equity securities		946			946			—				—
	Collateralized debt obligations		329			—			—				329
	Available for sale securities	$	717,602		$	946		$	712,362			$	4,294
	Gross asset value of derivatives	$	—		$	—		$	—			$	—
	Liabilities
	Gross liability value of derivatives	$	1,103		$	—		$	1,103			$	—
	There were no transfers of assets and liabilities between levels of the fair value hierarchy during the three and nine months ended September 30, 2013 and 2012.
	Assets measured at fair value on a recurring basis are summarized below as of December 31, 2012:
					Fair Value Measurements Using
	(Dollars in thousands)	Total			Quoted Prices in			Significant				Significant
					Active Markets			Other Observable				Unobservable
					for Identical			Inputs				Inputs
					Assets			(Level 2)				(Level 3)
					(Level 1)
	Assets
	Available for sale securities:
	U.S. Government agencies	$	8,015		$	—		$	8,015			$	—
	States and political subdivisions—tax exempt		17,215			—			17,215				—
	States and political subdivisions—taxable		573			—			573				—
	Mortgage-backed securities—residential		973,853			—			973,853				—
	Industrial revenue bonds		3,800			—			—				3,800
	Marketable equity securities		2,719			2,719			—				—
	Corporate bonds		26			—			—				26
	Trust preferred securities		246			246			—				—
	Collateralized debt obligations		297			—			—				297
	Available for sale securities	$	1,006,744		$	2,965		$	999,656			$	4,123
	Gross asset value of derivatives	$	880		$	—		$	880			$	—
	Liabilities
	Gross liability value of derivatives	$	1,024		$	—		$	1,024			$	—
The table below presents reconciliations and income statement classifications of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended September 30, 2013 and held at September 30, 2013.
	Fair Value Measurements Using Significant
	Unobservable Inputs (Level 3)
(Dollars in thousands)	Corporate Bonds			Industrial Revenue			Collateralized Debt
				Bonds			Obligations
Beginning balance, June 30, 2013	$	—		$	3,872		$	301
Included in earnings—other than temporary impairment		—			—			—
Included in earnings—gain on sale		—			—			—
Included in other comprehensive income		—			93			28
Sales		—			—			—
Transfer in to Level 3		—			—			—
Ending balance September 30, 2013	$	—		$	3,965		$	329
The table below presents reconciliations 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 nine months ended September 30, 2013 and held at September 30, 2013.
	Fair Value Measurements Using Significant
	Unobservable Inputs (Level 3)
(Dollars in thousands)	Corporate Bonds			Industrial Revenue			Collateralized Debt
				Bonds			Obligations
Beginning balance, January 1, 2013	$	26		$	3,800		$	297
Included in earnings—other than temporary impairment		—			—			—
Included in earnings—gain on sale		199			—			—
Included in other comprehensive income		—			165			32
Sales		(225	)		—			—
Transfer in to Level 3		—			—			—
Ending balance September 30, 2013	$	—		$	3,965		$	329
The table below presents reconciliations and income statement classifications of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended September 30, 2012 and held at September 30, 2012.
	Fair Value Measurements Using Significant
	Unobservable Inputs (Level 3)
(Dollars in thousands)	Corporate Bonds			Industrial Revenue			Collateralized Debt
				Bonds			Obligations
Beginning balance, June 30, 2012	$	752		$	3,750		$	247
Included in earnings—other than temporary impairment		—			—			—
Included in earnings—gain on sale		—			—			—
Included in other comprehensive income		—			—			41
Sales		(726	)		—			—
Transfer in to Level 3		—			—			—
Ending balance September 30, 2012	$	26		$	3,750		$	288
The table below presents reconciliations 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 nine months ended September 30, 2012 and held at September 30, 2012.
	Fair Value Measurements Using Significant
	Unobservable Inputs (Level 3)
(Dollars in thousands)	Corporate Bonds			Industrial Revenue			Collateralized Debt
				Bonds			Obligations
Beginning balance, January 1, 2012	$	790		$	3,750		$	328
Included in earnings—other than temporary impairment		(38	)		—			—
Included in earnings—gain on sale		—			—			—
Included in other comprehensive income		—			—			42
Sales		(726	)		—			(82	)
Transfer in to Level 3		—			—			—
Ending balance September 30, 2012	$	26		$	3,750		$	288
Quantitative Information about Recurring Level 3 Fair Value Measurements
(Dollars in thousands)	Fair			Valuation Technique		Significant Unobservable	Range
	Value at					Input
	September 30,
	2013
Industrial revenue bonds	$	3,965		Discounted cash flow		Discount rate	3.6-3.7%
						Illiquidity factor	0.50%
Collateralized debt obligations	$	329		Discounted cash flow		Discount rate	Libor +10.75% and +13%
(Dollars in thousands)	Fair			Valuation Technique(s)		Significant Unobservable	Range
	Value at					Input
	December 31,
	2012
Corporate bonds	$	26		Discounted cash flow		Discount rate	20%
						Default probability	95%
Industrial revenue bond	$	3,800		Discounted cash flow		Current yield/discount rate	1.6-1.7%
						Illiquidity factor	0.30%
Collateralized debt obligations	$	297		Discounted cash flow		Discount rate	Libor +10.75% and +13%
Assets and Liabilities Measured on a Nonrecurring Basis
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. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the appraisers 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.
Assets and liabilities measured at fair value on a nonrecurring basis are summarized below as of September 30, 2013:
	Fair Value Measurements Using
(Dollars in thousands)	Quoted Prices in			Significant			Significant
	Active Markets			Other Observable			Unobservable
	for Identical			Inputs			Inputs
	Assets			(Level 2)			(Level 3)
	(Level 1)
Assets
Other real estate owned	$	—		$	—		$	100,031
Other repossessed assets		—			132			—
Other real estate owned measured at fair value as of September 30, 2013 had a carrying amount of $124.6 million, less a valuation allowance of $24.6 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, 2012:
	Fair Value Measurements Using
(Dollars in thousands)	Quoted Prices in			Significant			Significant
	Active Markets			Other Observable			Unobservable
	for Identical			Inputs			Inputs
	Assets			(Level 2)			(Level 3)
	(Level 1)
Assets
Other real estate owned	$	—		$	—		$	85,645
Other repossessed assets		—			268			—
Other real estate owned measured at fair value as of December 31, 2012 had a carrying amount of $101.7 million, less a valuation allowance of $16.1 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			Valuation Technique(s)			Significant Unobservable		Range
	Value at						Input
	September 30,
	2013
OREO	$	100,031			Fair value of property		Appraised value less			7% - 10%
							costs to sell
(Dollars in thousands)	Fair			Valuation Technique(s)			Significant Unobservable		Range
	Value at						Input
	December 31,
	2012
OREO	$	85,645			Fair value of property		Appraised value less			7% - 10%
							costs to sell
Carrying amount and estimated fair values of financial instruments were as follows:
	Fair Value Measurement
(Dollars in thousands)	Carrying			Estimated			Level 1				Level 2		Level 3
	Value			Fair Value
September 30, 2013
Financial Assets
Cash and cash equivalents	$	163,704		$	163,704		$	163,704			$	—	$	—
Trading securities		6,091			6,091			6,091				—		—
Investment securities available-for-sale		717,602			717,602			946				712,362		4,294
Investment securities held-to-maturity		482,986			483,413			—				483,413		—
Loans, net		4,420,887			4,619,163			—				8,918		4,610,245
Receivable from FDIC		8,439			8,439			—				8,439		—
Indemnification asset		36,837			36,837			—				—		36,837
Federal Reserve, Federal Home Loan Bank and Independent Bankers’ Bank Stock		40,195			40,195			—				—		40,195
Gross asset value of derivatives		—			—			—				—		—
Total financial assets	$	5,876,741		$	6,075,444		$	170,741			$	1,213,132	$	4,691,571
Financial Liabilities
Noncontractual deposits	$	3,688,697		$	3,688,697		$	—			$	—	$	3,688,697
Contractual deposits		1,579,772			1,572,723			—				—		1,572,723
Federal Home Loan Bank advances		1,324			1,246			—				1,246		—
Short-term borrowings		23,224			23,224			—				23,224		—
Long-term borrowings		53,679			56,387			—				—		56,387
Subordinated debentures		84,611			90,898			—				—		90,898
Gross liability value of derivatives		1,103			1,103			—				1,103		—
Total financial liabilities	$	5,432,410		$	5,434,278		$	—			$	25,573	$	5,408,705
December 31, 2012
Financial Assets
Cash and cash equivalents	$	734,874		$	734,874		$	734,874			$	—	$	—
Investment securities available-for-sale		1,006,744			1,006,744			2,965				999,656		4,123
Loans, net		4,678,228			4,962,495			—				11,276		4,951,219
Receivable from FDIC		8,486			8,486			—				8,486		—
Indemnification asset		49,417			49,417			—				—		49,417
Federal Reserve, Federal Home Loan Bank and Independent Bankers’ Bank Stock		39,217			39,217			—				—		39,217
Gross asset value of derivatives		880			880			—				880		—
Total financial assets	$	6,517,846		$	6,802,113		$	737,839			$	1,020,298	$	5,043,976
Financial Liabilities
Noncontractual deposits	$	3,802,170		$	3,802,170		$	—			$	—	$	3,802,170
Contractual deposits		2,070,698			2,075,342			—				—		2,075,954
Federal home loan bank advances		1,460			1,401			—				1,401		—
Short-term borrowings		41,508			41,507			—				41,507		—
Long-term borrowings		54,354			58,983			—				—		58,983
Subordinated debentures		126,076			124,798			—				—		124,798
Gross liability value of derivatives		412			412			—				412		—
Total financial liabilities	$	6,096,678		$	6,104,613		$	—			$	43,932	$	6,061,905
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 the indemnification asset, Federal Reserve, Federal Home Loan Bank stock and other bankers’ bank 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 expected credit risk. 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 includes 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, 2013
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Derivative Instruments	'
	15. Derivative Instruments
	The Company has stand-alone derivative financial instruments which it acquired in its purchase of Southern Community, primarily in the form of interest rate swaps, foreign exchange contracts, option agreements, and interest rate caps. The forward loan sales contracts are derived from recourse loans. These transactions involve both credit and market risk.
	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, 2013, the company recorded $(0.3) million and $(0.7) million, respectively, in non-interest income and $0.2 million and $0.4 million, respectively, in non-interest expense as a result of changes in fair value.
	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 Company’s derivative instrument contracts which are recorded in other assets and other liabilities on the Company’s balance sheet consist of the following:
		September 30, 2013					December 31, 2012
	(Dollars in thousands)	Fair Value			Notional		Fair Value			Notional
					Amount					Amount
	Assets:
	Interest rate swaps associated with certificates of deposits (maturing in 2040)	$	—		$	—	$	682		$	25,000
	Interest rate cap contracts (maturing in 2014)		—			12,500		—			12,500
	Interest rate swaps associated with loan contracts (maturing in 2014)		—			—		132			2,366
	Currency exchange contracts (maturing in 2013)		—			—		66			7,745
	Forward loan sales contracts (maturing in 2013)		—			—		—			—
		$	—		$	12,500	$	880		$	47,611
	Liabilities:
	Interest rate swaps associated with certificates of deposits (maturing in 2040)	$	(845	)	$	25,000	$
	Interest rate swaps associated with loan contracts (maturing in 2014)		—			—		(132	)		2,366
	Currency exchange contracts (maturing in 2013)		(116	)		10,000		(280	)		10,000
	Forward loan sales contracts (maturing in 2013)		(142	)		11,145		—			—
		$	(1,103	)	$	46,145	$	(412	)	$	12,366
	The primary objective for each of these contracts is to minimize risk. Interest rate risk being the primary risk for the interest rate caps, swaps and forward loan sales contracts. Foreign exchange currency fluctuation risk is the primary risk for the foreign exchange contracts. The interest rate on the underlying $10.0 million certificates of deposit is based on a proprietary index (Barclays Intelligent Carry Index USD ER) managed by the counterparty (Barclays Bank). The currency exchange contracts are also based on this proprietary index. Forward loan sales contracts had a de minimis value as of December 31, 2012.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2013
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 163 full service banking offices located in Florida, North Carolina, South Carolina, Tennessee and Virginia.
	In September 2012, Capital Bank Corporation (“CBKN”), Green Bankshares Inc. (“GRNB”) and TIB Financial Corp. (“TIBB”), then majority owned subsidiaries of the Company, merged with and into Capital Bank Financial Corp. with CBF continuing as the surviving corporation (the “Reorganization”). Upon completion of the Reorganization, the outstanding common shares held by the minority shareholders were converted into an aggregate of 3.7 million shares of CBF’s Class A common stock.
	The Reorganization was accounted for as a merger with CBF as the accounting acquirer (which is the surviving entity for legal purposes). As this was a common control transaction under Accounting Standard Codification (“ASC”) 805, Business Combinations, the Reorganization was accounted for as an equity transaction in accordance with ASC 810, Consolidation, as the acquisition of a noncontrolling interest. As a result, there was no adjustment to CBF’s historical carrying amounts of assets and liabilities reflected in the accompanying balance sheet.
	On October 1, 2012, the Company completed its acquisition of Southern Community Financial Corporation (“SCMF” or “Southern Community”), a publicly held bank holding company headquartered in Winston Salem, North Carolina. See Note 3 – Business Combinations, for further information regarding this acquisition.
	The accompanying unaudited consolidated financial statements for the Company 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 US 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 our annual report on Form 10-K for the fiscal year ended December 31, 2012.
	Certain prior period amounts have been reclassified to conform to the current period presentation.
Direct Financing Leases	'
	Direct Financing Leases
	Direct financing leases are carried at the aggregate of lease payments receivable and estimated residual value of the leased property, if applicable, less unearned income. Interest income on direct financing leases is recognized over the term of the leases to achieve a constant periodic rate of return on the outstanding investment. Initial direct costs are deferred and amortized over the lease term as a reduction to interest income using the effective interest method.
Loss Contingencies	'
	Loss Contingencies
	Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there are currently any such matters that will have a material effect on the financial statements.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists”. This update requires an unrecognized tax benefit related to a net operating loss carryforward, a similar tax loss or a tax credit carryforward to be presented as a reduction to a deferred tax asset, unless the tax benefit is not available at the reporting date to settle any additional income taxes under the tax law of the applicable tax jurisdiction. For public entities, this ASU is effective for fiscal years and interim periods beginning after December 15, 2013, with early adoption permitted. The adoption of this ASU is not expected to have a material effect on the Company’s consolidated financial statements.
	In February 2013, the FASB issued ASUNo. 2013-02, “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income .” This update requires entities to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, entities are required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income. For public entities, this ASU is effective prospectively for fiscal years and interim periods within those years beginning after December 15, 2012. This update adopted on January 1, 2013, as required, impacted presentation only and it did not have an impact on the Company’s consolidated financial position, results of operations or cash flows.
	In October 2012, the FASB issued ASU No. 2012-06, “Business Combinations: Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution.” This ASU addresses the diversity in practice about how to interpret the terms on the same basis and contractual limitations when subsequently measuring an indemnification asset recognized in a government-assisted (Federal Deposit Insurance Corporation or National Credit Union Administration) acquisition of a financial institution that includes a loss-sharing agreement (indemnification agreement). For public and nonpublic entities, the amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning on or after December 15, 2012. The amendments should be applied prospectively to any new indemnification assets acquired after the date of adoption and to indemnification assets existing as of the date of adoption arising from a government-assisted acquisition of a financial institution. The adoption on January 1, 2013, as required, did not have a material impact on the Company’s consolidated financial condition or results of operations. Subsequent changes in the measurement of the indemnification asset will be accounted for on the same basis as the changes in the assets subject to indemnification resulting from future changes in the expected cash flows.
	In December 2011, the FASB issued ASU 2011-11, “Disclosures about Offsetting Assets and Liabilities.” This update requires entities to disclose both gross information and net information about instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. The application of this ASU was clarified by ASU 2013-01. The scope of this ASU includes derivatives, sale and repurchase agreements and reverse sale and repurchase agreements and securities borrowing and lending arrangements. The Company is required to adopt this update for periods beginning after January 1, 2013, with restrocpective presentation for all comparative periods. The adoption did not 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, 2013
Earnings Per Share [Abstract]	'
Computation of Earnings Per Share	'
	Earnings per share have been computed based on the following:
	(Shares in thousands)	Three Months		Three Months		Nine Months		Nine Months
		Ended September 30,		Ended September  30,		Ended September  30,		Ended September  30,
		2013		2012		2013		2012
	Weighted average number of common shares outstanding:
	Basic		51,804		46,116		53,170		45,496
	Dilutive effect of options outstanding		31		—		—		—
	Dilutive effect of restricted shares		920		622		862		456
	Diluted		52,755		46,738		54,032		45,952
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		Three Months Ended		Nine Months Ended		Nine Months Ended
		September 30,		September 30,		September 30,		September 30,
		2013		2012		2013		2012
	Anti-dilutive stock options		269		2,867		3,133		2,837
	Anti-dilutive restricted shares		—		—		—		—

Business_Combinations_and_Acqu1

Business Combinations and Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Reconciliation of Their Impact on the Acquired Assets, Assumed Liabilities and Prior Period Operating Results	'
	A reconciliation of their impact on the acquired assets, assumed liabilities and prior period operating results is shown below:
	(Dollars in thousands)	Reported on Dec. 31,		Measurement			Revised as of
		2012 as of October 1,		Period			October 1,  2012
		2012		Adjustments
	Fair value of assets acquired:
	Cash and cash equivalents	$	256,267				$	256,267
	Investment securities		189,771					189,771
	Loans		774,781		43,238			818,019
	Premises and equipment		35,061					35,061
	Other intangible assets		6,860					6,860
	Deferred tax asset		43,481		(15,532	)		27,949
	Other assets		60,159		(174	)		59,985
	Total assets acquired		1,366,380		27,532			1,393,912
	Fair value of liabilities assumed:
	Deposits		1,093,914					1,093,914
	Long term debt and other borrowings		187,341					187,341
	Other liabilities		17,703		11,656			29,359
	Total liabilities assumed		1,298,958		11,656			1,310,614
	Fair value of net assets acquired		67,422		15,876			83,298
	Purchase price		99,325					99,325
	Goodwill	$	31,903	$	(15,876	)	$	16,027
Summary of Prior Period Operating Results	'
	For the Quarter Ended
		June 30,		June 30,			March 31,		March 31,		December 31,		December 31,
		2013		2013			2013		2013		2012		2012
		Revised		As Filed			Revised		As Filed		Revised		As filed
	Interest and dividend income	$	73,189	$	74,989		$	76,106	$	76,814	$	77,808	$	76,122
	Interest expense		7,837		7,837		$	8,992		8,992		10,115		10,115
	Net Interest Income		65,352		67,152			67,114		67,822		67,693		66,007
	Provision for loan losses		4,467		3,868			5,402		6,904		6,736		4,370
	Total non-interest income		13,506		13,506			10,909		10,909		15,438		15,438
	Total non-interest expense		59,382		59,141			61,313		61,040		68,720		68,448
	Income before income taxes		15,009		17,649			11,308		10,787		7,675		8,627
	Income tax expense		5,580		6,514			5,543		5,234		3,031		3,295
	Net income attributable to Capital Bank Financial Corp.	$	9,429	$	11,135		$	5,765	$	5,553		4,644	$	5,332
	Basic Earnings Per Common Share	$	0.18	$	0.21		$	0.11	$	0.1	$	0.09	$	0.1
	Diluted Earnings Per Common Share	$	0.17	$	0.21		$	0.11	$	0.1	$	0.08	$	0.1
Pro Forma Information for the Quarter Presented as Though Acquisition had Taken Place at Beginning of Respective Period	'
	The following table reflects the pro forma total net interest income, non-interest income and net income for the three and nine months ended September 30, 2012 as though the acquisition of SCMF had taken place as of the beginning of fiscal 2012. The pro forma results are not necessarily indicative of the results of operations that would have occurred had the acquisition actually taken place on the first day of the respective period, nor of future results of operations.
	(Dollars in thousands)	Three Months		Nine Months
		Ended		Ended
		September 30,  2012		September 30,  2012
	Net interest income	$	69,422	$	218,207
	Non-interest income		34,467		68,800
	Net income attributable to Capital Bank Financial Corp.		46,604		59,274

Investment_Securities_Tables

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2013
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, 2013, and December 31, 2012 are presented below:
	(Dollars in thousands)	September 30, 2013
	Available-for-sale	Amortized		Unrealized		Unrealized			Estimated
		Cost		Gains		Losses			Fair Value
	Asset-backed securities	$	139,148	$	—	$	1,187		$	137,961
	Marketable equity securities		946		—		—			946
	Mortgage-backed securities—residential issued by government sponsored entities		574,051		4,229		3,879			574,401
	Industrial revenue bond		3,750		215		—			3,965
	Collateralized debt obligations		505		—		176			329
	Total	$	718,400	$	4,444	$	5,242		$	717,602
	Held-to-maturity
	U.S. Government agencies		15,192		—		307			14,885
	States and political subdivisions—tax exempt		14,172		44		27			14,189
	States and political subdivisions—taxable		547		—		6			541
	Mortgage-backed securities—residential issued by government sponsored entities		453,075		1,520		797			453,798
	Total	$	482,986	$	1,564	$	1,137		$	483,413
	(Dollars in thousands)	December 31, 2012
	Available-for-sale	Amortized		Unrealized		Unrealized			Estimated
		Cost		Gains		Losses			Fair Value
	Asset-backed securities	$	—	$	—	$	—		$	—
	U.S. Government agencies		7,913		102		—			8,015
	States and political subdivisions—tax exempt		16,019		1,196		—			17,215
	States and political subdivisions—taxable		509		64		—			573
	Marketable equity securities		2,731		—		12			2,719
	Mortgage-backed securities—residential issued by government sponsored entities		959,863		15,048		1,058			973,853
	Industrial revenue bond		3,750		50		—			3,800
	Corporate bonds		26		—		—			26
	Trust preferred securities		250		—		4			246
	Collateralized debt obligations		505		—		208			297
	Total	$	991,566	$	16,460	$	1,282		$	1,006,744
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, 2013, by contractual maturity, are shown as 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)
	Available-for-sale	Amortized		Estimated		Yield
		Cost		Fair Value
	Due in one year or less	$	—	$	—		—	%
	Due after one year through five years		—		—		—	%
	Due after five years through ten years		58,422		58,064		0.62	%
	Due after ten years		84,981		84,191		0.69	%
	Mortgage-backed securities—residential issued by government sponsored entities		574,051		574,401		1.54	%
		$	717,454	$	716,656		1.36	%
	Marketable equity securities		946		946
		$	718,400	$	717,602
	Held-to-maturity	Amortized		Estimated		Yield
		Cost		Fair Value
	Due in one year or less	$	679	$	678		0.83	%
	Due after one year through five years		1,130		1,134		2.06	%
	Due after five years through ten years		7,198		7,197		3.03	%
	Due after ten years		20,904		20,606		3.05	%
	Mortgage-backed securities—residential issued by government sponsored entities		453,075		453,798		2.23	%
		$	482,986	$	483,413		2.27	%
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
	September 30, 2013	Estimated Fair		Unrealized		Estimated Fair			Unrealized		Estimated Fair		Unrealized
		Value		Losses		Value			Losses		Value		Losses
	Available-for-sale:
	Asset-backed securities	$	137,961	$	1,187	$	—		$	—	$	137,961	$	1,187
	Mortgage-backed securities—residential issued by government sponsored entities		338,084		3,879		—			—		338,084		3,879
	Collateralized debt obligation		—		—		329			176		329		176
	Total	$	476,045	$	5,066	$	329		$	176	$	476,374	$	5,242
	Held-to-maturity:
	U.S. Government agencies	$	14,885	$	307	$	—		$	—	$	14,885	$	307
	State and political subdivisions—tax exempt		7,656		27		—			—		7,656		27
	State and political subdivisions—taxable		541		6		—			—		541		6
	Mortgage-backed securities—residential issued by government sponsored entities		81,712		797		—			—		81,712		797
	Total	$	104,794	$	1,137	$	—		$	—	$	104,794	$	1,137
	(Dollars in thousands)	Less than 12 Months				12 Months or Longer					Total
	December 31, 2012	Estimated Fair		Unrealized		Estimated Fair			Unrealized		Estimated Fair		Unrealized
		Value		Losses		Value			Losses		Value		Losses
	Available-for-sale:
	Marketable equity securities	$	988	$	12	$	—		$	—	$	988	$	12
	Mortgage-backed securities—residential issued by government sponsored entities		247,515		846		21,221			212		268,736		1,058
	Trust preferred securities		246		4		—			—		246		4
	Collateralized debt obligation		—		—		297			208		297		208
	Total	$	248,749	$	862	$	21,518		$	420	$	270,267	$	1,282
Credit Losses Recognized in Earnings	'
	The table below presents a rollforward for the three and nine months ended September 30, 2013 and 2012 of the other than temporary impairment credit losses recognized in earnings.
	(Dollars in thousands)	Three Months		Three Months		Nine Months			Nine Months
		Ended		Ended		Ended			Ended
		September 30, 2013		September 30, 2012		September 30, 2013			September 30, 2012
	Beginning balance	$	660	$	660	$	660		$	616
	Additions/subtractions:
	Credit losses recognized during the period		54		—		54			44
	Ending balance	$	714	$	660	$	714		$	660

Loans_Tables

Loans (Tables)	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Major Classifications of Loans	'
	Major classifications of loans, including loans held for sale, are as follows:
	(Dollars in thousands)		September 30, 2013			December 31, 2012
	Non-owner occupied commercial real estate		$	803,954		$	904,215
	Other commercial construction and land			326,040			415,969
	Multifamily commercial real estate			72,627			84,838
	1-4 family residential construction and land			76,013			91,680
	Total commercial real estate			1,278,634			1,496,702
	Owner occupied commercial real estate			1,052,994			1,065,900
	Commercial and industrial loans			681,882			665,507
	Lease financing			2,554			—
	Total commercial			1,737,430			1,731,407
	1-4 family residential			816,915			838,557
	Home equity loans			386,071			430,887
	Other consumer loans			158,452			136,806
	Total consumer			1,361,438			1,406,250
	Other (1)			99,778			101,131
	Total loans		$	4,477,280		$	4,735,490
	-1	Other loans include deposit customer overdrafts of $1.9 million and $3.2 million as of September 30, 2013 and December 31, 2012, respectively.
Roll Forward of Accretable Yield	'
	The table below presents a rollforward of accretable yield and income expected to be earned related to purchased credit-impaired loans:
	(Dollars in thousands)		Three Months Ended					Three Months Ended				Nine Months Ended				Nine Months Ended
			September 30, 2013					September 30, 2012				September 30, 2013				September 30, 2012
	Balance, beginning of period		$	444,481				$	609,993			$	553,348			$	715,479
	New loans purchased			—					—				—				—
	Accretion of income			(39,625	)				-43,927				-126,634				-142,024
	Reclassifications from nonaccretable difference			15,018					19,134				46,117				76,697
	Disposals			(21,459	)				-35,160				-74,416				-100,112
	Balance, end of period		$	398,415				$	550,040			$	398,415			$	550,040
Major Categories of Loans	'
	The following is a summary of the major categories of non-covered loans outstanding as of September 30, 2013 and December 31, 2012:
	(Dollars in thousands)
	September 30, 2013		PCI Loans			Non-PCI				Total
						Loans				Non-covered
										Loans
	Non-owner occupied commercial real estate		$	476,248		$	260,773			$	737,021
	Other commercial C&D			240,931			64,490				305,421
	Multifamily commercial real estate			36,040			26,150				62,190
	1-4 family residential C&D			18,079			57,934				76,013
	Total commercial real estate			771,298			409,347				1,180,645
	Owner occupied commercial real estate			321,684			657,677				979,361
	Commercial and industrial			140,800			530,111				670,911
	Lease financing			—			2,554				2,554
	Total commercial			462,484			1,190,342				1,652,826
	1-4 family residential			374,519			364,549				739,068
	Home equity			104,927			227,959				332,886
	Consumer			14,754			143,629				158,383
	Total consumer			494,200			736,137				1,230,337
	Other			48,217			50,530				98,747
	Total		$	1,776,199		$	2,386,356			$	4,162,555
	(Dollars in thousands)
	December 31, 2012		PCI Loans			Non-PCI				Total
						Loans				Non-covered
										Loans
	Non-owner occupied commercial real estate		$	628,234		$	181,009			$	809,243
	Other commercial C&D			328,280			55,967				384,247
	Multifamily commercial real estate			46,146			27,078				73,224
	1-4 family residential C&D			45,305			42,208				87,513
	Total commercial real estate			1,047,965			306,262				1,354,227
	Owner occupied commercial real estate			425,869			556,025				981,894
	Commercial and industrial			194,481			453,969				648,450
	Leasing			—			—				—
	Total commercial			620,350			1,009,994				1,630,344
	1-4 family residential			486,122			260,622				746,744
	Home equity			129,967			240,810				370,777
	Consumer			28,109			108,512				136,621
	Total consumer			644,198			609,944				1,254,142
	Other			56,287			40,480				96,767
	Total		$	2,368,800		$	1,966,680			$	4,335,480
	Covered Loans
	The following is a summary of the major categories of covered loans outstanding as of September 30, 2013 and December 31, 2012:
	(Dollars in thousands)
	September 30, 2013		PCI Loans			Non-PCI				Total Covered
						Loans				Loans
	Non-owner occupied commercial real estate		$	66,933		$	—			$	66,933
	Other commercial C&D			20,619			—				20,619
	Multifamily commercial real estate			10,437			—				10,437
	1-4 family residential C&D			—			—				—
	Total commercial real estate			97,989			—				97,989
	Owner occupied commercial real estate			73,633			—				73,633
	Commercial and industrial			10,612			359				10,971
	Leasing			—			—				—
	Total commercial			84,245			359				84,604
	1-4 family residential			77,055			792				77,847
	Home equity			16,038			37,147				53,185
	Consumer			69			—				69
	Total consumer			93,162			37,939				131,101
	Other			1,031			—				1,031
	Total		$	276,427		$	38,298			$	314,725
	(Dollars in thousands)
	December 31, 2012		PCI Loans			Non-PCI				Total Covered
						Loans				Loans
	Non-owner occupied commercial real estate		$	94,916		$	56			$	94,972
Other commercial C&D			31,722			—				31,722
Multifamily commercial real estate			11,614			—				11,614
1-4 family residential C&D			4,167			—				4,167
Total commercial real estate			142,419			56				142,475
Owner occupied commercial real estate			84,006			—				84,006
Commercial and industrial			16,451			606				17,057
Leasing			—			—				—
Total commercial			100,457			606				101,063
1-4 family residential			91,586			227				91,813
Home equity			16,823			43,287				60,110
Consumer			185			—				185
Total consumer			108,594			43,514				152,108
Other			4,364			—				4,364
Total		$	355,834		$	44,176			$	400,010
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, 2013 by class of loans:
	(Dollars in thousands)
	Non-purchased credit impaired loans		30-89 Days Past Due							Greater than 90 Days								Nonaccrual				Total
										Past Due and Still
										Accruing/Accreting
			Covered			Non-Covered				Covered				Non-Covered				Covered		Non-Covered
	Non-owner occupied commercial real estate		$	—		$	201			$	—			$	—			$	—	$	94	$	295
	Other commercial C&D			—			150				—				—				—		441		591
	Multifamily commercial real estate			—			—				—				—				—		—		—
	1-4 family residential C&D			—			—				—				—				—		2,581		2,581
	Total commercial real estate			—			351				—				—				—		3,116		3,467
	Owner occupied commercial real estate			—			173				—				—				—		2,252		2,425
	Commercial and industrial			—			12				—				—				66		2,512		2,590
	Lease financing			—			—				—				—				—		—		—
	Total commercial			—			185				—				—				66		4,764		5,015
	1-4 family residential			—			814				—				—				—		952		1,766
	Home equity			402			731				—				—				1,190		2,919		5,242
	Consumer			—			1,452				—				—				—		805		2,257
	Total consumer			402			2,997				—				—				1,190		4,676		9,265
	Other			—			—				—				—				—		11		11
	Total		$	402		$	3,533			$	—			$	—			$	1,256	$	12,567	$	17,758
	(Dollars in thousands)
	Purchased credit impaired loans		30-89 Days Past Due							Greater than 90 Day								Nonaccrual				Total
										Past Due and Still
										Accruing/Accreting
			Covered			Non-Covered				Covered				Non-Covered				Covered		Non-Covered
	Non-owner occupied commercial real estate		$	243		$	4,847			$	12,199			$	42,040			$	—	$	—	$	59,329
	Other commercial C&D			—			5,631				10,313				60,915				—		—		76,859
	Multifamily commercial real estate			—			119				957				3,378				—		—		4,454
	1-4 family residential C&D			—			10				—				3,041				—		—		3,051
	Total commercial real estate			243			10,607				23,469				109,374				—		—		143,693
	Owner occupied commercial real estate			247			3,353				4,870				37,136				—		—		45,606
	Commercial and industrial			—			4,068				167				22,784				—		—		27,019
	Lease financing			—			—				—				—				—		—		—
	Total commercial			247			7,421				5,037				59,920				—		—		72,625
	1-4 family residential			374			8,010				10,643				41,008				—		—		60,035
	Home equity			39			1,602				1,821				6,711				—		—		10,173
	Consumer			—			512				33				380				—		—		925
	Total consumer			413			10,124				12,497				48,099				—		—		71,133
	Other			—			438				5				3,069				—		—		3,512
	Total		$	903		$	28,590			$	41,008			$	220,462			$	—	$	—	$	290,963
	The following tables present the aging of the recorded investment in past due loans, based on contractual terms, as of December 31, 2012 by class of loans:
	(Dollars in thousands)
	Non-purchased credit impaired loans		30-89 Days Past Due							Greater than 90 Days								Nonaccrual				Total
										Past Due and Still
										Accruing/Accreting
			Covered			Non-Covered				Covered				Non-Covered				Covered		Non-Covered
	Non-owner occupied commercial real estate		$	—		$	—			$	—			$	—			$	56	$	24	$	80
	Other commercial C&D			—			—				—				—				—		97		97
	Multifamily commercial real estate			—			—				—				—				—		—		—
	1-4 family residential C&D			—			474				—				—				—		363		837
	Total commercial real estate			—			474				—				—				56		484		1,014
	Owner occupied commercial real estate			—			405				—				—				—		1,966		2,371
	Commercial and industrial			—			608				—				—				276		2,057		2,941
	Leasing			—			—				—				—				—		—		—
	Total commercial			—			1,013				—				—				276		4,023		5,312
	1-4 family residential			—			1,648				—				—				—		3,731		5,379
	Home equity			1,614			1,416				—				—				2,460		2,613		8,103
	Consumer			—			1,873				—				—				—		368		2,241
	Total consumer			1,614			4,937				—				—				2,460		6,712		15,723
	Other			—			49				—				—				—		—		49
	Total		$	1,614		$	6,473			$	—			$	—			$	2,792	$	11,219	$	22,098
	(Dollars in thousands)
Purchased credit impaired loans		30-89 Days Past Due							Greater than 90 Days								Nonaccrual				Total
									Past Due and Still
									Accruing/Accreting
		Covered			Non-Covered				Covered				Non-Covered				Covered		Non-Covered
Non-owner occupied commercial real estate		$	2,799		$	4,662			$	17,286			$	44,917			$	—	$	—	$	69,664
Other commercial C&D			135			7,183				21,659				84,189				—		—		113,166
Multifamily commercial real estate			—			194				3,612				2,755				—		—		6,561
1-4 family residential C&D			—			2,405				3,482				5,145				—		—		11,032
Total commercial real estate			2,934			14,444				46,039				137,006				—		—		200,423
Owner occupied commercial real estate			873			4,210				7,646				54,971				—		—		67,700
Commercial and industrial			99			3,921				2,045				32,007				—		—		38,072
Leasing			—			—				—				—				—		—		—
Total commercial			972			8,131				9,691				86,978				—		—		105,772
1-4 family residential			1,214			15,550				13,685				41,905				—		—		72,354
Home equity			345			4,224				3,024				10,247				—		—		17,840
Consumer			1			1,213				—				493				—		—		1,707
Total consumer			1,560			20,987				16,709				52,645				—		—		91,901
Other			—			2,918				1,014				1,988				—		—		5,920
Total		$	5,466		$	46,480			$	73,453			$	278,617			$	—	$	—	$	404,016
Loans, Excluding Purchased Credit-Impaired Loans, Monitored for Credit Quality Based on Internal Ratings	'
	The following table summarizes loans, excluding purchased credit-impaired loans, monitored for credit quality based on internal ratings at September 30, 2013:
										Substandard
	(Dollars in thousands)		Pass			Special				Accruing/				Nonaccrual				Doubtful		Total
						Mention				Accreting
	Non-owner occupied commercial real estate		$	259,151		$	644			$	884			$	94			$	—	$	260,773
	Other commercial C&D			63,233			666				150				441				—		64,490
	Multifamily commercial real estate			25,842			—				308				—				—		26,150
	1-4 family residential C&D			50,810			1,565				2,978				2,581				—		57,934
	Total commercial real estate			399,036			2,875				4,320				3,116				—		409,347
	Owner occupied commercial real estate			653,194			—				2,231				2,252				—		657,677
	Commercial and industrial			519,704			5,408				2,780				2,578				—		530,470
	Lease financing			2,554			—				—				—				—		2,554
	Total commercial			1,175,452			5,408				5,011				4,830				—		1,190,701
	1-4 family residential			364,359			30				—				952				—		365,341
	Home equity			258,591			237				2,169				4,109				—		265,106
	Consumer			142,793			—				31				805				—		143,629
	Total consumer			765,743			267				2,200				5,866				—		774,076
	Other			50,245			—				274				11				—		50,530
	Total		$	2,390,476		$	8,550			$	11,805			$	13,823			$	—	$	2,424,654
	The following table summarizes loans, excluding purchased credit-impaired loans, monitored for credit quality based on internal ratings at December 31, 2012:
										Substandard
			Pass			Special				Accruing/				Nonaccrual				Doubtful		Total
						Mention				Accreting
	Non-owner occupied commercial real estate		$	180,080		$	—			$	905			$	80			$	—	$	181,065
	Other commercial C&D			55,394			325				150				98				—		55,967
	Multifamily commercial real estate			26,760			—				318				—				—		27,078
	1-4 family residential C&D			39,026			160				2,659				363				—		42,208
	Total commercial real estate			301,260			485				4,032				541				—		306,318
	Owner occupied commercial real estate			548,506			2,953				2,600				1,966				—		556,025
	Commercial and industrial			437,904			1,470				12,868				2,333				—		454,575
	Leasing			—			—				—				—				—		—
	Total commercial			986,410			4,423				15,468				4,299				—		1,010,600
	1-4 family residential			256,805			313				—				3,731				—		260,849
	Home equity			274,827			777				3,420				5,073				—		284,097
	Consumer			107,924			110				111				367				—		108,512
	Total consumer			639,556			1,200				3,531				9,171				—		653,458
	Other			40,431			49				—				—				—		40,480
	Total		$	1,967,657		$	6,157			$	23,031			$	14,011			$	—	$	2,010,856

Allowance_for_Loan_Losses_Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Allowance for Loan Losses	'
	Activity in the allowance for loan losses for the three and nine months ended September 30, 2013 and 2012 is as follows:
	(Dollars in thousands)		Three Months			Three Months			Nine Months			Nine Months
			Ended September  30,			Ended September  30,			Ended September  30,			Ended September  30,
			2013			2012			2013			2012
	Balance, beginning of period		$	56,832		$	45,472		$	57,262		$	34,749
	Provision (Reversal) for loan losses on PCI loans			(72	)		4,698			(703	)		12,050
	Provision for loan losses on non-PCI loans			1,056			1,073			11,556			5,705
	PCI loans charged off			—			—			—			—
	Non PCI loans charged off			(1,945	)		(824	)		(15,335	)		(3,690	)
	Recoveries of PCI loans previously charged off			—			—			—			—
	Recoveries of non-PCI loans previously charged off			522			1,168			3,613			2,773
	Balance, end of period		$	56,393		$	51,587		$	56,393		$	51,587
Roll Forward of the Allowance for Loan Losses	'
	The following table presents the roll forward of the allowance for loan losses for the three months ended September 30, 2013 by the class of loans against which the allowance is allocated:
	(Dollars in thousands)		June 30,			Provision /			Net  (Charge-			September 30,
			2013			(Reversals)			offs)/Recoveries			2013
	Non-owner occupied commercial real estate		$	4,329		$	2,344		$	11		$	6,684
	Other commercial C&D			12,310			(1,201	)		85			11,194
	Multifamily commercial real estate			258			44			—			302
	1-4 family residential C&D			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			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			3,937			(40	)		(120	)		3,777
	Consumer			2,361			734			(565	)		2,530
	Total consumer			23,870			(346	)		(634	)		22,890
	Other			1,275			(306	)		(438	)		531
	Total		$	56,832		$	984		$	(1,423	)	$	56,393
	The following table presents the roll forward of the allowance for loan losses for the nine months ended September 30, 2013 by the class of loans against which the allowance is allocated:
	(Dollars in thousands)		December 31,			Provision /			Net (Charge-			September 30,
			2012			(Reversals)			offs)/Recoveries			2013
	Non-owner occupied commercial real estate		$	3,764		$	2,936		$	(16	)	$	6,684
	Other commercial C&D			12,711			(2,120	)		603			11,194
	Multifamily commercial real estate			348			(87	)		41			302
	1-4 family residential C&D			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			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			8,670			(3,861	)		(1,032	)		3,777
	Consumer			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		$	57,262		$	10,853		$	(11,722	)	$	56,393
	The following table presents the roll forward of the allowance for loan losses for the three months ended September 30, 2012 by the class of loans against which the allowance is allocated:
	(Dollars in thousands)		June 30,			Provision /			Net  (Charge-			September 30,
			2012			(Reversals)			offs)/Recoveries			2012
	Non-owner occupied commercial real estate		$	2,154		$	1,434		$	4		$	3,592
	Other commercial C&D			10,944			2,004			278			13,226
	Multifamily commercial real estate			210			(25	)		—			185
	1-4 family residential C&D			1,265			529			1			1,795
	Total commercial real estate			14,573			3,942			283			18,798
	Owner occupied commercial real estate			4,783			(1,126	)		237			3,894
	Commercial and industrial			4,724			1,669			(14	)		6,379
	Leasing			—			—			—			—
	Total commercial			9,507			543			223			10,273
	1-4 family residential			12,050			1,554			35			13,639
	Home equity			6,998			(4	)		(469	)		6,525
	Consumer			1,736			631			(406	)		1,961
	Total consumer			20,784			2,181			(840	)		22,125
	Other			608			(895	)		678			391
	Total		$	45,472		$	5,771		$	344		$	51,587
	The following table presents the roll forward of the allowance for loan losses for the nine months ended September 30, 2012 by the class of loans against which the allowance is allocated:
	(Dollars in thousands)		December 31,			Provision /			Net  (Charge-			September 30,
			2011			(Reversals)			offs)/Recoveries			2012
	Non-owner occupied commercial real estate		$	3,854		$	(1,028	)	$	766		$	3,592
	Other commercial C&D			7,627			5,354			245			13,226
	Multifamily commercial real estate			398			(213	)		—			185
	1-4 family residential C&D			921			873			1			1,795
	Total commercial real estate			12,800			4,986			1,012			18,798
	Owner occupied commercial real estate			5,454			(1,811	)		251			3,894
Commercial and industrial			4,166			2,081			132			6,379
Leasing			—			—			—			—
Total commercial			9,620			270			383			10,273
1-4 family residential			7,252			6,304			83			13,639
Home equity			2,711			5,016			(1,202	)		6,525
Consumer			1,594			1,121			(754	)		1,961
Total consumer			11,557			12,441			(1,873	)		22,125
Other			772			58			(439	)		391
Total		$	34,749		$	17,755		$	(917	)	$	51,587
Summary of Allowance for Loan Losses and Recorded Investment in Loans by Class of Loans and by Impairment Evaluation	'
	The following table presents the balance in the allowance for loan losses and the recorded investment in loans by class of loans and by impairment evaluation method as of September 30, 2013:
			Allowance for Loan Losses									Loans
	(Dollars in thousands)		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		$	—		$	1,399		$	5,285		$	—		$	260,773	$	543,181
	Other commercial C&D			—			1,644			9,550			—			64,490		261,550
	Multifamily commercial real estate			—			109			193			—			26,150		46,477
	1-4 family residential C&D			—			1,115			1,046			—			57,934		18,079
	Total commercial real estate			—			4,267			16,074			—			409,347		869,287
	Owner occupied commercial real estate			—			2,572			2,498			—			657,677		395,317
	Commercial and industrial			64			5,266			2,228			2,318			528,152		151,412
	Lease financing			—			3			—			—			2,554		—
	Total commercial			64			7,841			4,726			2,318			1,188,383		546,729
	1-4 family residential			—			2,217			14,366			—			356,423		451,574
	Home equity			—			358			3,419			—			265,106		120,965
	Consumer			1			2,152			377			15			143,614		14,823
	Total consumer			1			4,727			18,162			15			765,143		587,362
	Other			—			376			155			—			50,530		49,248
	Total		$	65		$	17,211		$	39,117		$	2,333		$	2,413,403	$	2,052,626
	-1	Loans collectively evaluated for impairment include $459.5 million of acquired loans which are presented net of unamortized purchase discounts of $12.1 million.
	The following table presents the balance in the allowance for loan losses and the recorded investment in loans by class of loans and by impairment evaluation method as of December 31, 2012:
			Allowance for Loan Losses									Loans
	(Dollars in thousands)		Individually			Collectively			Purchased			Individually			Collectively		Purchased
			Evaluated			Evaluated			Credit-			Evaluated			Evaluated		Credit-
			for			for			Impaired			for			for		Impaired
			Impairment			Impairment						Impairment			Impairment (2)
	Non-owner occupied commercial real estate		$	—		$	1,461		$	2,303		$	—		$	181,065	$	723,150
	Other commercial C&D			—			1,810			10,901			—			55,967		360,002
	Multifamily commercial real estate			—			129			219			—			27,078		57,760
	1-4 family residential C&D			—			943			773			—			42,208		49,472
	Total commercial real estate			—			4,343			14,196			—			306,318		1,190,384
	Owner occupied commercial real estate			38			2,905			1,112			1,756			554,269		509,875
	Commercial and industrial			—			5,920			1,570			—			454,575		210,932
	Leasing			—			—			—			—			—		—
	Total commercial			38			8,825			2,682			1,756			1,008,844		720,807
	1-4 family residential			—			1,915			13,825			3,153			246,420		577,708
	Home equity			—			376			8,294						284,097		146,790
	Consumer			—			1,568			514			—			108,512		28,294
	Total consumer			—			3,859			22,633			3,153			639,029		752,792
	Other			—			377			309			—			40,480		60,651
	Total		$	38		$	17,404		$	39,820		$	4,909		$	1,994,671	$	2,724,634

FDIC_Indemnification_Asset_Tab

FDIC Indemnification Asset (Tables)	9 Months Ended
	Sep. 30, 2013
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, 2012	$	49,417
	Indemnification asset income		2,003
	Amortization on indemnification asset		(5,782	)
	Reimbursable losses claimed		(8,801	)
	Balance, September 30, 2013	$	36,837
	Balance, December 31, 2011	$	66,282
	Indemnification asset income		7,850
	Amortization on indemnification asset		(6,842	)
	Reimbursable losses claimed		(10,746	)
	Balance, September 30, 2012	$	56,544

Other_Real_Estate_Owned_Tables

Other Real Estate Owned (Tables)	9 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Other Real Estate Owned	'
	The activity within Other Real Estate Owned (“OREO”) for the three and nine months ended September 30, 2013 and 2012 is presented in the table below.
	(Dollars in thousands)	Three Months Ended			Three Months Ended			Nine Months Ended			Nine Months Ended
		September  30, 2013			September  30, 2012			September  30, 2013			September  30, 2012
	Balance, beginning of period	$	142,793		$	158,235		$	154,093		$	168,781
	Real estate acquired from borrowers		10,585			23,233			53,366			65,530
	Valuation expense		(6,045	)		(8,633	)		(18,844	)		(15,529	)
	(Loss) gain on sale of properties		(188	)		1,514			3,204			3,937
	Properties sold and other		(17,491	)		(29,728	)		(62,165	)		(78,098	)
	Balance, end of period	$	129,654		$	144,621		$	129,654		$	144,621

Federal_Home_Loan_Bank_Advance1

Federal Home Loan Bank Advances and Short-Term Borrowings (Tables)

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

'

Federal Home Loan Bank Advance Owed

'

The advances as of September 30, 2013 consisted of the following:

(Dollars in thousands)

Contractual

Maturity Date

Repricing

Contractual

Outstanding

Frequency

Rate at

Amount

September 30,

2013

$

760

November 2017

Fixed

0.5

%

564

Feb-26

Fixed

0

%

$

1,324

The advances as of December 31, 2012 consisted of the following:

(Dollars in thousands)

Contractual

Maturity Date

Repricing

Contractual

Outstanding

Frequency

Rate at

Amount

December 31,

2012

$

867

November 2017

Fixed

0.5

%

593

Feb-26

Fixed

0

%

$

1,460

Long_Term_Borrowings_Tables

Long Term Borrowings (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Schedule of Outstanding Structured Repurchase Agreements	'
	At September 30, 2013, outstanding structured repurchase agreements totaled $50.0 million of contractual amounts with carrying values of $53.7 million.
	(Dollars in thousands)
	Carrying				Contractual				Maturity Date	Rate at
	Amount				Amount					September 30, 2013
	$	10,894			$	10,000			November 6, 2016		4.75	%
		10,521				10,000			18-Dec-17		3.72	%
		10,896				10,000			30-Mar-17		4.5	%
		10,552				10,000			December 18, 2017		3.79	%
		10,816				10,000			22-Mar-19		3.56	%
	$	53,679			$	50,000
	At December 31, 2012, outstanding structured repurchase agreements totaled $50.0 million of contractual amounts with carrying values of $54.4 million.
	(Dollars in thousands)
	Carrying				Contractual				Maturity Date	Rate at
	Amount				Amount					December 31, 2012
	$	11,102			$	10,000			November 6, 2016		4.75	%
		10,608				10,000			18-Dec-17		3.72	%
		11,080				10,000			30-Mar-17		4.5	%
		10,644				10,000			December 18, 2017		3.79	%
		10,920				10,000			22-Mar-19		3.56	%
	$	54,354			$	50,000
Summary of Subordinated Debentures	'
	(Dollars in thousands)
	Date of Offering		Original Face				Carrying			Carrying			Interest Rate	Call Date	Maturity
			Amount				Amount			Amount			As of September 30, 2013		Date
							September 30,			December 31,
							2013			2012
	September 7, 2000		$	8,000			$	—		$	8,762		—	September 7, 2010	September 7, 2030
	July 31, 2001			5,000				3,840			3,795		3.85% (3 Month LIBOR	July 31, 2006	July 31, 2031
													plus 358 basis points)
	July 31, 2001			4,000				2,620			2,573		3.85% (3 Month LIBOR	July 31, 2006	July 31, 2031
													plus 358 basis points)
	June 26, 2003			10,000				5,898			5,832		3.35% (3 Month LIBOR	26-Jun-08	26-Jun-33
													plus 310 basis points)
	September 25, 2003			10,000				6,331			6,222		3.12% (3 Month LIBOR	September 25, 2008	September 25, 2033
													plus 285 basis points)
	November 10, 2003			34,500				—			34,189		—	November 10, 2008	December 31, 2033
	December 30, 2003			10,000				5,681			5,614		3.12% (3 Month LIBOR	30-Dec-08	30-Dec-33
													plus 285 basis points)
	June 28, 2005			3,000				1,533			1,497		1.93% (3 Month LIBOR	June 28, 2010	June 28, 2035
													plus 168 basis points)
	December 22, 2005			10,000				4,463			4,383		1.65% (3 Month LIBOR	22-Dec-10	15-Mar-36
													plus 140 basis points)
	December 28, 2005			13,000				6,407			6,255		1.79% (3 Month LIBOR	28-Dec-10	15-Mar-36
													plus 154 basis points)
	June 23, 2006			20,000				11,137			10,918		1.82% (3 Month LIBOR	June 23, 2011	7-Jul-36
													plus 155 basis points)
	May 16, 2007			56,000				27,840			27,220		1.90% (3 Month LIBOR	16-May-12	16-May-37
													plus 165 basis points)
	June 15, 2007			10,000				5,302			5,243		1.69% (3 Month LIBOR	15-Jun-12	6-Sep-37
													plus 143 basis points)
			$	193,500			$	81,052		$	122,503
Schedule of Maturities of Long-Term Borrowings	'
	At September 30, 2013, 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			10,894				—			10,894
	Due in 2017			31,969				—			31,969
	Due in 2018			—				—			—
	Thereafter			14,375				81,052			95,427
	Total long-term debt		$	57,238			$	81,052		$	138,290
	At December 31, 2012, the maturities of long-term borrowings were as follows:
	(Dollars in thousands)		Fixed Rate				Floating Rate			Total
	Due in 2013 through 2015		$	—			$	—		$	—
	Due in 2016			11,102				—			11,102
	Due in 2017			32,332				—			32,332
	Thereafter			57,444				79,552			136,996
	Total long-term debt		$	100,878			$	79,552		$	180,430

Shareholders_Equity_and_Minimu1

Shareholders' Equity and Minimum Regulatory Capital Requirements (Tables)	9 Months Ended
	Sep. 30, 2013
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 as of September 30, 2013 and December 31, 2012 are presented in the following tables.
	(Dollars in thousands)	Well Capitalized					Adequately					Actual
		Requirement					Capitalized
							Requirement
	September 30, 2013	Amount		Ratio			Amount		Ratio			Amount		Ratio
	Tier 1 Capital (to Average Assets)
	Consolidated		N/A		N/A		³	$256,831	³	4.0	%	$	928,770		14.5	%
	Capital Bank, NA	³	$321,016	³	5	%	³	256,813	³	4	%		820,704		12.8	%
	Tier 1 Capital (to Risk Weighted Assets)
	Consolidated		N/A		N/A		³	$188,340	³	4	%	$	928,770		19.7	%
	Capital Bank, NA	³	$282,524	³	6	%	³	188,350	³	4	%		820,704		17.4	%
	Total Capital (to Risk Weighted Assets)
	Consolidated		N/A		N/A		³	$376,679	³	8	%	$	989,088		21	%
	Capital Bank, NA	³	$470,874	³	10.0	%	³	376,699	³	8	%		880,856		18.7	%
	(Dollars in thousands)	Well Capitalized					Adequately					Actual
		Requirement					Capitalized
							Requirement
	December 31, 2012	Amount		Ratio			Amount		Ratio			Amount		Ratio
	Tier 1 Capital (to Average Assets)
	Consolidated		N/A		N/A		³	$282,575	³	4.0	%	$	964,309		13.7	%
	Capital Bank, NA	³	$353,323	³	5	%	³	282,659	³	4	%		850,472		12	%
	Tier 1 Capital (to Risk Weighted Assets)
	Consolidated		N/A		N/A		³	$193,640	³	4	%	$	964,309		19.9	%
	Capital Bank, NA	³	$290,349	³	6	%	³	193,566	³	4	%		850,472		17.6	%
	Total Capital (to Risk Weighted Assets)
	Consolidated		N/A		N/A		³	$387,281	³	8	%	$	1,025,545		21.2	%
	Capital Bank, NA	³	$483,915	³	10.0	%	³	387,132	³	8	%		911,528		18.8	%

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2013
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, 2013 and 2012.
	(Dollars in thousands)	Three Months Ended			Three Months Ended			Nine Months Ended		Nine Months Ended
		September 30, 2013			September 30, 2012			September 30, 2013		September 30, 2012
	Stock options	$	215		$	1,867		$	395	$	8,017
	Restricted stock		1,156			2,375			3,917		6,910
	Total stock-based compensation expense	$	1,371		$	4,242		$	4,312	$	14,927
	Salaries and employee benefits	$	1,371		$	3,907		$	4,312	$	13,930
	Other expense		—			335			—		997
	Total stock-based compensation expense	$	1,371		$	4,242		$	4,312	$	14,927
Summary of Stock Option Grants under 2010 Plan	'
	The following table lists the various stock option grants from our 2010 Plan for the nine months ended September 30, 2013 and 2012:
	(Shares in thousands)
	Stock Option Grant	Number of Options			Exercise			Fair
		Granted			Price			Value
	May 21, 2013—Employees		264		$	18			6.52
	January 12, 2012—Employees		628		$	20			8.05
Summary of Stock Option Activity	'
	The following table summarizes the stock option activity for the nine months ended September 30, 2013 and 2012:
	(Shares in thousands)	2013						2012
	(Shares in thousands)	Shares			Weighted			Shares		Weighted
					Average					Average
					Exercise Price					Exercise Price
					Per Share					Per Share
	Balance, January 1,		2,890		$	21.39			2,236	$	20
	Granted		264			18			628		20
	Exercised		—			—			—		—
	Expired or forfeited		21			113.8			—		—
	Balance, September 30,		3,133		$	20.5			2,864	$	20
Summary of Options Outstanding	'
	Options outstanding at September 30, 2013 were as follows:
	(Shares in thousands)	Outstanding Options								Exercisable Options
	Range of Exercise Prices	Number			Weighted			Weighted		Number		Weighted
					Average			Average				Average
					Remaining			Exercise Price				Exercise
					Contractual			Per Share				Price
					Life
	$18.00		253			9.64 years		$	18		—		—
	$20.00		2,864			6.68 years			20		2,864	$	20
	$28.44 - $2,026.00		16			3.89 years			153.63		15		159.68
	$20.00 - $2,026.00		3,133			6.91 years		$	20.5		2,879	$	20.71
	Options outstanding at December 31, 2012 were as follows:
	(Shares in thousands)	Outstanding Options								Exercisable Options
	Range of Exercise Prices	Number			Weighted			Weighted		Number		Weighted
					Average			Average				Average
					Remaining			Exercise Price				Exercise
					Contractual			Per Share				Price
					Life
	$20.00		2,864			7.42 years		$	20		2,550	$	20
	$28.44 - $2,026.00		26			3.65 years			174.5		25		178.71
	$20.00 - $2,026.00		2,890			7.39 years		$	21.39		2,575	$	21.55
Summary of Restricted Stock Award Under 2010 Plan	'
	The following table lists the various restricted stock awards under our 2010 Plan for the nine months ended September 30, 2013 and 2012:
	(Shares in thousands)
	Date of Award	Number of Restricted  Stock			Price Per
		Awards			Share
	May 21, 2013—Employees		4		$	18
	January 1, 2012—Employees		307		$	19.84
Summary of Unvested Restricted Stock Awards	'
	The following table summarizes unvested restricted stock activity for the nine months ended September 30, 2013 and 2012:
	(Shares in thousands)	2013						2012
		Shares			Weighted			Shares		Weighted
					Average					Average
					Grant-Date					Grant-Date
					Fair Value Per					Fair Value Per
					Share					Share
	Balance, January 1,		1,212		$	14.27			967	$	13.26
	Granted		4			18			307		18.01
	Vested		—			—			—		—
	Expired or forfeited		—			—			—		—
	Balance, September 30,		1,216		$	14.28			1,274	$	14.4
Employee Stock Option [Member]	'
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 and 2012:
		Nine Months Ended			Nine Months Ended
		September  30, 2013			September  30, 2012
	Dividend yield		0	%		0	%
	Risk-free interest rate		1.016	%		0.91	%
	Expected option life		5.75 years			5.25 years
	Volatility		37	%		45	%
	Weighted average grant-date fair value of options granted	$	6.52		$	8.05
Restricted Stock Awards [Member]	'
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 restricted stock awards granted during the nine months ended September 30, 2013 and 2012.
		Nine Months Ended September 30, 2013			Nine Months Ended September 30, 2012
	Grant date fair value of shares	$	18		$	19.84
	Risk-free interest rate		Forward Treasury Curve			Forward Treasury Curve
	Market risk premium		N/A			0	%
	Volatility		N/A			45	%
	Annual forfeiture estimate		N/A			0	%
	Weighted average grant-date fair value of restricted stock awards granted	$	18		$	18.01

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2013
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:
	(Dollars in thousands)	Three Months			Three Months			Nine Months			Nine Months
		Ended September  30,			Ended September  30,			Ended September  30,			Ended September  30,
		2013			2012			2013			2012
	Pretax income from continuing operations	$	20,419		$	5,460		$	46,736		$	25,808
	Income taxes computed at Federal statutory tax rate		7,147			1,911			16,358			9,033
	Effect of:
	State taxes (net of federal benefit)		784			214			1,795			1,012
	State statutory rate change		1,545			—			1,545			—
	Change in estimate of deductible loan losses		—			(33,975	)		—			(33,975	)
	CVR adjustment		(301	)		—			1,156			—
	Other, net		(200	)		(535	)		(756	)		(643	)
	Total income tax expense	$	8,975		$	(32,385	)	$	20,098		$	(24,573	)

Fair_Value_Tables

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2013
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, 2013:
					Fair Value Measurements Using
	(Dollars in thousands)	Total			Quoted Prices in			Significant				Significant
					Active Markets			Other Observable				Unobservable
					for Identical			Inputs				Inputs
					Assets			(Level 2)				(Level 3)
					(Level 1)
	Assets
	Trading securities	$	6,091		$	6,091		$	—			$	—
	Available for sale securities:
	Asset-backed securities		137,961			—			137,961				—
	Mortgage-backed securities—residential		574,401			—			574,401				—
	Industrial revenue bonds		3,965			—			—				3,965
	Marketable equity securities		946			946			—				—
	Collateralized debt obligations		329			—			—				329
	Available for sale securities	$	717,602		$	946		$	712,362			$	4,294
	Gross asset value of derivatives	$	—		$	—		$	—			$	—
	Liabilities
	Gross liability value of derivatives	$	1,103		$	—		$	1,103			$	—
	Assets measured at fair value on a recurring basis are summarized below as of December 31, 2012:
					Fair Value Measurements Using
	(Dollars in thousands)	Total			Quoted Prices in			Significant				Significant
					Active Markets			Other Observable				Unobservable
					for Identical			Inputs				Inputs
					Assets			(Level 2)				(Level 3)
					(Level 1)
	Assets
	Available for sale securities:
	U.S. Government agencies	$	8,015		$	—		$	8,015			$	—
	States and political subdivisions—tax exempt		17,215			—			17,215				—
	States and political subdivisions—taxable		573			—			573				—
	Mortgage-backed securities—residential		973,853			—			973,853				—
	Industrial revenue bonds		3,800			—			—				3,800
	Marketable equity securities		2,719			2,719			—				—
	Corporate bonds		26			—			—				26
	Trust preferred securities		246			246			—				—
	Collateralized debt obligations		297			—			—				297
	Available for sale securities	$	1,006,744		$	2,965		$	999,656			$	4,123
	Gross asset value of derivatives	$	880		$	—		$	880			$	—
	Liabilities
	Gross liability value of derivatives	$	1,024		$	—		$	1,024			$	—
Fair Value Measurements on Recurring Basis Using Significant Unobservable Inputs (Level 3)	'
	The table below presents reconciliations and income statement classifications of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended September 30, 2013 and held at September 30, 2013.
		Fair Value Measurements Using Significant
		Unobservable Inputs (Level 3)
	(Dollars in thousands)	Corporate Bonds			Industrial Revenue			Collateralized Debt
					Bonds			Obligations
	Beginning balance, June 30, 2013	$	—		$	3,872		$	301
	Included in earnings—other than temporary impairment		—			—			—
	Included in earnings—gain on sale		—			—			—
	Included in other comprehensive income		—			93			28
	Sales		—			—			—
	Transfer in to Level 3		—			—			—
	Ending balance September 30, 2013	$	—		$	3,965		$	329
	The table below presents reconciliations 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 nine months ended September 30, 2013 and held at September 30, 2013.
		Fair Value Measurements Using Significant
		Unobservable Inputs (Level 3)
	(Dollars in thousands)	Corporate Bonds			Industrial Revenue			Collateralized Debt
					Bonds			Obligations
	Beginning balance, January 1, 2013	$	26		$	3,800		$	297
	Included in earnings—other than temporary impairment		—			—			—
	Included in earnings—gain on sale		199			—			—
	Included in other comprehensive income		—			165			32
	Sales		(225	)		—			—
	Transfer in to Level 3		—			—			—
	Ending balance September 30, 2013	$	—		$	3,965		$	329
	The table below presents reconciliations and income statement classifications of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended September 30, 2012 and held at September 30, 2012.
		Fair Value Measurements Using Significant
		Unobservable Inputs (Level 3)
	(Dollars in thousands)	Corporate Bonds			Industrial Revenue			Collateralized Debt
					Bonds			Obligations
	Beginning balance, June 30, 2012	$	752		$	3,750		$	247
	Included in earnings—other than temporary impairment		—			—			—
	Included in earnings—gain on sale		—			—			—
	Included in other comprehensive income		—			—			41
	Sales		(726	)		—			—
	Transfer in to Level 3		—			—			—
	Ending balance September 30, 2012	$	26		$	3,750		$	288
	The table below presents reconciliations 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 nine months ended September 30, 2012 and held at September 30, 2012.
		Fair Value Measurements Using Significant
		Unobservable Inputs (Level 3)
	(Dollars in thousands)	Corporate Bonds			Industrial Revenue			Collateralized Debt
					Bonds			Obligations
	Beginning balance, January 1, 2012	$	790		$	3,750		$	328
	Included in earnings—other than temporary impairment		(38	)		—			—
	Included in earnings—gain on sale		—			—			—
	Included in other comprehensive income		—			—			42
	Sales		(726	)		—			(82	)
	Transfer in to Level 3		—			—			—
	Ending balance September 30, 2012	$	26		$	3,750		$	288
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, 2013:
		Fair Value Measurements Using
	(Dollars in thousands)	Quoted Prices in			Significant			Significant
		Active Markets			Other Observable			Unobservable
		for Identical			Inputs			Inputs
		Assets			(Level 2)			(Level 3)
		(Level 1)
	Assets
	Other real estate owned	$	—		$	—		$	100,031
	Other repossessed assets		—			132			—
	Assets and liabilities measured at fair value on a nonrecurring basis are summarized below as of December 31, 2012:
		Fair Value Measurements Using
	(Dollars in thousands)	Quoted Prices in			Significant			Significant
		Active Markets			Other Observable			Unobservable
		for Identical			Inputs			Inputs
		Assets			(Level 2)			(Level 3)
		(Level 1)
	Assets
	Other real estate owned	$	—		$	—		$	85,645
	Other repossessed assets		—			268			—
Carrying Amount and Estimated Fair Values of Financial Instruments	'
	Carrying amount and estimated fair values of financial instruments were as follows:
		Fair Value Measurement
	(Dollars in thousands)	Carrying			Estimated			Level 1				Level 2		Level 3
		Value			Fair Value
	September 30, 2013
	Financial Assets
	Cash and cash equivalents	$	163,704		$	163,704		$	163,704			$	—	$	—
	Trading securities		6,091			6,091			6,091				—		—
	Investment securities available-for-sale		717,602			717,602			946				712,362		4,294
	Investment securities held-to-maturity		482,986			483,413			—				483,413		—
	Loans, net		4,420,887			4,619,163			—				8,918		4,610,245
	Receivable from FDIC		8,439			8,439			—				8,439		—
	Indemnification asset		36,837			36,837			—				—		36,837
	Federal Reserve, Federal Home Loan Bank and Independent Bankers’ Bank Stock		40,195			40,195			—				—		40,195
	Gross asset value of derivatives		—			—			—				—		—
	Total financial assets	$	5,876,741		$	6,075,444		$	170,741			$	1,213,132	$	4,691,571
	Financial Liabilities
	Noncontractual deposits	$	3,688,697		$	3,688,697		$	—			$	—	$	3,688,697
	Contractual deposits		1,579,772			1,572,723			—				—		1,572,723
	Federal Home Loan Bank advances		1,324			1,246			—				1,246		—
	Short-term borrowings		23,224			23,224			—				23,224		—
	Long-term borrowings		53,679			56,387			—				—		56,387
	Subordinated debentures		84,611			90,898			—				—		90,898
	Gross liability value of derivatives		1,103			1,103			—				1,103		—
	Total financial liabilities	$	5,432,410		$	5,434,278		$	—			$	25,573	$	5,408,705
	December 31, 2012
	Financial Assets
	Cash and cash equivalents	$	734,874		$	734,874		$	734,874			$	—	$	—
	Investment securities available-for-sale		1,006,744			1,006,744			2,965				999,656		4,123
	Loans, net		4,678,228			4,962,495			—				11,276		4,951,219
	Receivable from FDIC		8,486			8,486			—				8,486		—
	Indemnification asset		49,417			49,417			—				—		49,417
	Federal Reserve, Federal Home Loan Bank and Independent Bankers’ Bank Stock		39,217			39,217			—				—		39,217
	Gross asset value of derivatives		880			880			—				880		—
	Total financial assets	$	6,517,846		$	6,802,113		$	737,839			$	1,020,298	$	5,043,976
	Financial Liabilities
	Noncontractual deposits	$	3,802,170		$	3,802,170		$	—			$	—	$	3,802,170
	Contractual deposits		2,070,698			2,075,342			—				—		2,075,954
	Federal home loan bank advances		1,460			1,401			—				1,401		—
	Short-term borrowings		41,508			41,507			—				41,507		—
	Long-term borrowings		54,354			58,983			—				—		58,983
	Subordinated debentures		126,076			124,798			—				—		124,798
	Gross liability value of derivatives		412			412			—				412		—
	Total financial liabilities	$	6,096,678		$	6,104,613		$	—			$	43,932	$	6,061,905
Fair Value on Recurring Basis [Member]	'
Quantitative Information about Fair Value Measurements	'
	Quantitative Information about Recurring Level 3 Fair Value Measurements
	(Dollars in thousands)	Fair			Valuation Technique		Significant Unobservable	Range
		Value at					Input
		September 30,
		2013
	Industrial revenue bonds	$	3,965		Discounted cash flow		Discount rate	3.6-3.7%
							Illiquidity factor	0.50%
	Collateralized debt obligations	$	329		Discounted cash flow		Discount rate	Libor +10.75% and +13%
	(Dollars in thousands)	Fair			Valuation Technique(s)		Significant Unobservable	Range
		Value at					Input
		December 31,
		2012
	Corporate bonds	$	26		Discounted cash flow		Discount rate	20%
							Default probability	95%
	Industrial revenue bond	$	3,800		Discounted cash flow		Current yield/discount rate	1.6-1.7%
							Illiquidity factor	0.30%
	Collateralized debt obligations	$	297		Discounted cash flow		Discount rate	Libor +10.75% and +13%
Fair Value on Nonrecurring Basis [Member]	'
Quantitative Information about Fair Value Measurements	'
	Quantitative Information about Nonrecurring Level 3 Fair Value Measurements
	(Dollars in thousands)	Fair			Valuation Technique(s)			Significant Unobservable		Range
		Value at						Input
		September 30,
		2013
	OREO	$	100,031			Fair value of property		Appraised value less			7% - 10%
								costs to sell
	(Dollars in thousands)	Fair			Valuation Technique(s)			Significant Unobservable		Range
		Value at						Input
		December 31,
		2012
	OREO	$	85,645			Fair value of property		Appraised value less			7% - 10%
								costs to sell

Derivative_Instruments_Tables

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
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 sheet consist of the following:
		September 30, 2013					December 31, 2012
	(Dollars in thousands)	Fair Value			Notional		Fair Value			Notional
					Amount					Amount
	Assets:
	Interest rate swaps associated with certificates of deposits (maturing in 2040)	$	—		$	—	$	682		$	25,000
	Interest rate cap contracts (maturing in 2014)		—			12,500		—			12,500
	Interest rate swaps associated with loan contracts (maturing in 2014)		—			—		132			2,366
	Currency exchange contracts (maturing in 2013)		—			—		66			7,745
	Forward loan sales contracts (maturing in 2013)		—			—		—			—
		$	—		$	12,500	$	880		$	47,611
	Liabilities:
	Interest rate swaps associated with certificates of deposits (maturing in 2040)	$	(845	)	$	25,000	$
	Interest rate swaps associated with loan contracts (maturing in 2014)		—			—		(132	)		2,366
	Currency exchange contracts (maturing in 2013)		(116	)		10,000		(280	)		10,000
	Forward loan sales contracts (maturing in 2013)		(142	)		11,145		—			—
		$	(1,103	)	$	46,145	$	(412	)	$	12,366

Basis_of_Presentation_Addition

Basis of Presentation - Additional Information (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
	Office	Capital Bank Corporation [Member]
Business Description And Basis Of Presentation [Line Items]	'	'
Total number of full service banking offices	163	'
Outstanding common shares converted into CBF's Class A common stock	'	3.7
Adjustment to carrying amounts of assets and liabilities due to reorganization	$0	'

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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Weighted average number of common shares outstanding:	'	'	'	'
Basic	51,804	46,116	53,170	45,496
Diluted	52,755	46,738	54,032	45,952
Employee Stock Option [Member]	'	'	'	'
Weighted average number of common shares outstanding:	'	'	'	'
Dilutive effect	31	'	'	'
Restricted Stock Awards [Member]	'	'	'	'
Weighted average number of common shares outstanding:	'	'	'	'
Dilutive effect	920	622	862	456

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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Stock Option [Member]	'	'	'	'
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive	269	2,867	3,133	2,837
Restricted Stock Awards [Member]	'	'	'	'
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive	'	'	'	'

Business_Combinations_and_Acqu2

Business Combinations and Acquisitions - Additional Information (Detail) (USD $)	12 Months Ended						9 Months Ended
	Dec. 31, 2012	Sep. 30, 2013	Oct. 01, 2012	Oct. 01, 2012	Oct. 01, 2012	Oct. 01, 2012	Sep. 30, 2013
		Branches		Contingent Value [Member]	Southern Community [Member]	Common Stock [Member]	Series A Preferred Stock [Member]
					Maximum [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'
Purchase price	'	'	'	'	'	$99,300,000	'
Consideration paid	'	'	'	$1.30	'	'	'
Maximum potential payment	'	'	'	'	21,900,000	'	'
Contingent Value right payment period	'5 years	'	'	'	'	'	'
Savings of loans	'	'	75.00%	'	'	'	'
Purchase price	'	'	'	'	'	'	$46,900,000
Number of branches	'	22	'	'	'	'	'

Business_Combinations_and_Acqu3

Business Combinations and Acquisitions - Reconciliation of Their Impact on the Acquired Assets, Assumed Liabilities and Prior Period Operating Results (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Oct. 01, 2012	Oct. 01, 2012	Oct. 01, 2012
In Thousands, unless otherwise specified			Previously Reported [Member]	Measurement Period Adjustments [Member]	Revised [Member]
			Southern Community [Member]	Southern Community [Member]	Southern Community [Member]
Fair value of assets acquired:	'	'	'	'	'
Cash and cash equivalents	'	'	$256,267	'	$256,267
Investment securities	'	'	189,771	'	189,771
Loans	'	'	774,781	43,238	818,019
Premises and equipment	'	'	35,061	'	35,061
Other intangible assets	'	'	6,860	'	6,860
Deferred tax asset	'	'	43,481	-15,532	27,949
Other assets	'	'	60,159	-174	59,985
Total assets acquired	'	'	1,366,380	27,532	1,393,912
Fair value of liabilities assumed:	'	'	'	'	'
Deposits	'	'	1,093,914	'	1,093,914
Long term debt and other borrowings	'	'	187,341	'	187,341
Other liabilities	'	'	17,703	11,656	29,359
Total liabilities assumed	'	'	1,298,958	11,656	1,310,614
Fair value of net assets acquired	'	'	67,422	15,876	83,298
Purchase price	'	'	99,325	'	99,325
Goodwill	$131,987	$131,987	$31,903	($15,876)	$16,027

Business_Combinations_and_Acqu4

Business Combinations and Acquisitions - Summary of Prior Period Operating Results (Detail) (USD $)	3 Months Ended					9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest and dividend income	$72,480	$74,989	$76,814	$76,122	$69,438	$221,775	$216,472
Interest expense	7,094	7,837	8,992	10,115	9,104	23,923	28,941
Net Interest Income	65,386	67,152	67,822	66,007	60,334	197,852	187,531
Provision for loan losses	984	3,868	6,904	4,370	5,771	10,853	17,755
Total non-interest income	15,280	13,506	10,909	15,438	20,268	39,695	47,270
Total non-interest expense	59,263	59,141	61,040	68,448	69,371	179,958	191,238
Income before income taxes	20,419	17,649	10,787	8,627	5,460	46,736	25,808
Income tax expense	8,975	6,514	5,234	3,295	-32,385	20,098	-24,573
Net income attributable to Capital Bank Financial Corp.	11,444	11,135	5,553	5,332	35,083	26,638	45,847
Basic Earnings Per Common Share	$0.22	$0.21	$0.10	$0.10	$0.76	$0.50	$1.01
Diluted Earnings Per Common Share	$0.22	$0.21	$0.10	$0.10	$0.75	$0.49	$1
Revised [Member]	'	'	'	'	'	'	'
Interest and dividend income	'	73,189	76,106	77,808	'	'	'
Interest expense	'	7,837	8,992	10,115	'	'	'
Net Interest Income	'	65,352	67,114	67,693	'	'	'
Provision for loan losses	'	4,467	5,402	6,736	'	'	'
Total non-interest income	'	13,506	10,909	15,438	'	'	'
Total non-interest expense	'	59,382	61,313	68,720	'	'	'
Income before income taxes	'	15,009	11,308	7,675	'	'	'
Income tax expense	'	5,580	5,543	3,031	'	'	'
Net income attributable to Capital Bank Financial Corp.	'	$9,429	$5,765	$4,644	'	'	'
Basic Earnings Per Common Share	'	$0.18	$0.11	$0.09	'	'	'
Diluted Earnings Per Common Share	'	$0.17	$0.11	$0.08	'	'	'

Business_Combinations_and_Acqu5

Business Combinations and Acquisitions - Pro Forma Information for the Quarter Presented as Though Acquisition had Taken Place at Beginning of Respective Period (Detail) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2012
Business Combinations [Abstract]	'	'
Net interest income	$69,422	$218,207
Non-interest income	34,467	68,800
Net income attributable to Capital Bank Financial Corp.	$46,604	$59,274

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, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	$718,400	$991,566
Unrealized Gains	4,444	16,460
Unrealized Losses	5,242	1,282
Estimated Fair Value	717,602	1,006,744
Amortized Cost	482,986	'
Unrealized Gains	1,564	'
Unrealized Losses	1,137	'
Estimated Fair Value	483,413	0
Asset-Backed Securities [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	139,148	'
Unrealized Gains	'	'
Unrealized Losses	1,187	'
Estimated Fair Value	137,961	'
U.S. Government Agencies [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	'	7,913
Unrealized Gains	'	102
Estimated Fair Value	'	8,015
Amortized Cost	15,192	'
Unrealized Losses	307	'
Estimated Fair Value	14,885	'
States and Political Subdivisions-Tax Exempt [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	'	16,019
Unrealized Gains	'	1,196
Estimated Fair Value	'	17,215
Amortized Cost	14,172	'
Unrealized Gains	44	'
Unrealized Losses	27	'
Estimated Fair Value	14,189	'
States and Political Subdivisions-Taxable [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	'	509
Unrealized Gains	'	64
Estimated Fair Value	'	573
Amortized Cost	547	'
Unrealized Losses	6	'
Estimated Fair Value	541	'
Marketable Equity Securities [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	946	2,731
Unrealized Losses	'	12
Estimated Fair Value	946	2,719
Mortgage-Backed Securities-Residential Issued by Government Sponsored Entities [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	574,051	959,863
Unrealized Gains	4,229	15,048
Unrealized Losses	3,879	1,058
Estimated Fair Value	574,401	973,853
Amortized Cost	453,075	'
Unrealized Gains	1,520	'
Unrealized Losses	797	'
Estimated Fair Value	453,798	'
Industrial Revenue Bonds [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	3,750	3,750
Unrealized Gains	215	50
Estimated Fair Value	3,965	3,800
Corporate Debt Securities [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	'	26
Estimated Fair Value	'	26
Trust Preferred Securities [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	'	250
Unrealized Losses	'	4
Estimated Fair Value	'	246
Collateralized Debt Obligations [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	505	505
Unrealized Losses	176	208
Estimated Fair Value	$329	$297

Investment_Securities_Addition

Investment Securities - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	Securities		Securities		Security
Investments Debt And Equity Securities [Abstract]	'	'	'	'	'
Amount transferred from available-for-sale securities to held-to-maturity securities	$511,000,000	'	$510,976,000	'	'
Unrealized gain (loss) included in other comprehensive income (loss), net of tax	-9,700,000	'	'	'	'
Gains losses recognized from transfer of Securities	0	'	'	'	'
Held-to-maturity, Investment Securities	'	'	'	'	0
Proceeds from sales and calls of securities available for sale	500,000	247,300,000	2,100,000	340,000,000	'
Gross gains realized on sales and calls	0	4,900,000	200,000	8,500,000	'
Trading securities	6,091,000	'	6,091,000	'	0
Gross realized losses on trading securities	200,000	'	200,000	'	'
Gross realized gains on trading securities	'	0	'	0	'
Net impairment losses recognized in earnings	54,000	'	54,000	44,000	'
Change in estimated fair value of CDO	32,000	'	32,000	'	'
Securities in portfolio	139	'	139	'	'
Securities in portfolio in an unrealized loss position	60	'	60	'	'
Investment securities, carrying values	$303,000,000	'	$303,000,000	'	'

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, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule Of Marketable Securities [Line Items]	'	'
Amortized Cost	$718,400	$991,566
Available for sale securities	717,602	1,006,744
Due in one year or less	679	'
Due after one year through five years	1,130	'
Due after five years through ten years	7,198	'
Due after ten years	20,904	'
Total, amortized cost	482,986	'
Due in one year or less	678	'
Due after one year through five years	1,134	'
Due after five years through ten years	7,197	'
Due after ten years	20,606	'
Total, estimated fair value	483,413	0
Due in one year or less	0.83%	'
Due after one year through five years	2.06%	'
Due after five years through ten years	3.03%	'
Due after ten years	3.05%	'
Total	2.27%	'
Mortgage-Backed Securities-Residential Issued by Government Sponsored Entities [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Mortgage-backed securities residential, Amortized Cost	574,051	'
Amortized Cost	574,051	959,863
Mortgage-backed securities-residential	574,401	'
Available for sale securities	574,401	973,853
Mortgage-backed securities-residential, Yield	1.54%	'
Total, amortized cost	453,075	'
Total, estimated fair value	453,798	'
Mortgage-backed securities-residential issued by government sponsored entities	2.23%	'
Debt Securities [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Due in one year or less, Amortized Cost	'	'
Due after one year through five years, Amortized Cost	'	'
Due after five years through ten years, Amortized Cost	58,422	'
Due after ten years, Amortized Cost	84,981	'
Available-for-sale debt securities, Amortized Cost	717,454	'
Due in one year or less, Estimated Fair Value	'	'
Due after one year through five years, Estimated Fair Value	'	'
Due after five years through ten years, Estimated Fair Value	58,064	'
Due after ten years, Estimated Fair Value	84,191	'
Estimated Fair Value, Gross	716,656	'
Due in one year or less, Yield	'	'
Due after one year through five years, Yield	'	'
Due after five years through ten years, Yield	0.62%	'
Due after ten years, Yield	0.69%	'
Available for sale securities-Debt securities to yield	1.36%	'
Marketable Equity Securities [Member]	'	'
Schedule Of Marketable Securities [Line Items]	'	'
Available-for-sale equity securities, Amortized Cost	946	'
Amortized Cost	946	2,731
Available for sale securities	$946	$2,719

Investment_Securities_Securiti

Investment Securities - Securities with Unrealized Losses Not Recognized in Income (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value, Less than 12 Months, Available-for-sale	$476,045	$248,749
Unrealized Losses, Less than 12 Months, Available-for-sale	5,066	862
Estimated Fair Value, 12 Months or Longer, Available-for-sale	329	21,518
Unrealized Losses,12 Months or Longer, Available-for-sale	176	420
Total, Estimated Fair Value, Available-for-sale	476,374	270,267
Total, Unrealized Losses, Available-for-sale	5,242	1,282
Estimated Fair Value, Less than 12 Months, Held-to-maturity	104,794	'
Unrealized Losses, Less than 12 Months, Held-to-maturity	1,137	'
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	'	'
Unrealized Losses, 12 Months or Longer, Held-to-maturity	'	'
Total, Estimated Fair Value, Held-to-maturity	104,794	'
Total, Unrealized Losses, Held-to-maturity	1,137	'
Asset-Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value, Less than 12 Months, Available-for-sale	137,961	'
Unrealized Losses, Less than 12 Months, Available-for-sale	1,187	'
Estimated Fair Value, 12 Months or Longer, Available-for-sale	'	'
Unrealized Losses,12 Months or Longer, Available-for-sale	'	'
Total, Estimated Fair Value, Available-for-sale	137,961	'
Total, Unrealized Losses, Available-for-sale	1,187	'
Mortgage-Backed Securities-Residential Issued by Government Sponsored Entities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value, Less than 12 Months, Available-for-sale	338,084	247,515
Unrealized Losses, Less than 12 Months, Available-for-sale	3,879	846
Estimated Fair Value, 12 Months or Longer, Available-for-sale	'	21,221
Unrealized Losses,12 Months or Longer, Available-for-sale	'	212
Total, Estimated Fair Value, Available-for-sale	338,084	268,736
Total, Unrealized Losses, Available-for-sale	3,879	1,058
Estimated Fair Value, Less than 12 Months, Held-to-maturity	81,712	'
Unrealized Losses, Less than 12 Months, Held-to-maturity	797	'
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	'	'
Unrealized Losses, 12 Months or Longer, Held-to-maturity	'	'
Total, Estimated Fair Value, Held-to-maturity	81,712	'
Total, Unrealized Losses, Held-to-maturity	797	'
Collateralized Debt Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value, Less than 12 Months, Available-for-sale	'	'
Unrealized Losses, Less than 12 Months, Available-for-sale	'	'
Estimated Fair Value, 12 Months or Longer, Available-for-sale	329	297
Unrealized Losses,12 Months or Longer, Available-for-sale	176	208
Total, Estimated Fair Value, Available-for-sale	329	297
Total, Unrealized Losses, Available-for-sale	176	208
U.S. Government Agencies [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value, Less than 12 Months, Held-to-maturity	14,885	'
Unrealized Losses, Less than 12 Months, Held-to-maturity	307	'
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	'	'
Unrealized Losses, 12 Months or Longer, Held-to-maturity	'	'
Total, Estimated Fair Value, Held-to-maturity	14,885	'
Total, Unrealized Losses, Held-to-maturity	307	'
States and Political Subdivisions-Tax Exempt [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value, Less than 12 Months, Held-to-maturity	7,656	'
Unrealized Losses, Less than 12 Months, Held-to-maturity	27	'
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	'	'
Unrealized Losses, 12 Months or Longer, Held-to-maturity	'	'
Total, Estimated Fair Value, Held-to-maturity	7,656	'
Total, Unrealized Losses, Held-to-maturity	27	'
States and Political Subdivisions-Taxable [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value, Less than 12 Months, Held-to-maturity	541	'
Unrealized Losses, Less than 12 Months, Held-to-maturity	6	'
Estimated Fair Value, 12 Months or Longer, Held-to-maturity	'	'
Unrealized Losses, 12 Months or Longer, Held-to-maturity	'	'
Total, Estimated Fair Value, Held-to-maturity	541	'
Total, Unrealized Losses, Held-to-maturity	6	'
Marketable Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value, Less than 12 Months, Available-for-sale	'	988
Unrealized Losses, Less than 12 Months, Available-for-sale	'	12
Estimated Fair Value, 12 Months or Longer, Available-for-sale	'	'
Unrealized Losses,12 Months or Longer, Available-for-sale	'	'
Total, Estimated Fair Value, Available-for-sale	'	988
Total, Unrealized Losses, Available-for-sale	'	12
Trust Preferred Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value, Less than 12 Months, Available-for-sale	'	246
Unrealized Losses, Less than 12 Months, Available-for-sale	'	4
Estimated Fair Value, 12 Months or Longer, Available-for-sale	'	'
Unrealized Losses,12 Months or Longer, Available-for-sale	'	'
Total, Estimated Fair Value, Available-for-sale	'	246
Total, Unrealized Losses, Available-for-sale	'	$4

Investment_Securities_Credit_L

Investment Securities - Credit Losses Recognized in Earnings (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments Debt And Equity Securities [Abstract]	'	'	'	'
Beginning balance	$660	$660	$660	$616
Additions/subtractions:	'	'	'	'
Credit losses recognized during the period	54	'	54	44
Ending balance	$714	$660	$714	$660

Loans_Major_Classifications_of

Loans - Major Classifications of Loans (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	$4,477,280	$4,735,490
Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	1,278,634	1,496,702
Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	1,737,430	1,731,407
Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	1,361,438	1,406,250
Other [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	99,778	101,131
Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	803,954	904,215
Other Commercial Construction and Land [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	326,040	415,969
Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	72,627	84,838
1-4 Family Residential Construction and Land [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	76,013	91,680
Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	1,052,994	1,065,900
Commercial and Industrial Loans [Member] | Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	681,882	665,507
Lease Financing [Member] | Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	2,554	'
1-4 Family Residential [Member] | Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	816,915	838,557
Home Equity [Member] | Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	386,071	430,887
Other Consumer Loans [Member] | Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	$158,452	$136,806

Loans_Major_Classifications_of1

Loans - Major Classifications of Loans (Parenthetical) (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Others loans	$4,477,280	$4,735,490
Other [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Others loans	99,778	101,131
Other [Member] | Farm Land and Agricultural [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Others loans	45,700	27,000
Other [Member] | State and Political Subdivision Obligations [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Others loans	$45,300	$26,000

Loans_Additional_Information_D

Loans - Additional Information (Detail) (USD $)	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Receivables [Abstract]	'	'	'	'	'	'	'
1-4 family residential loans	$8,918,000	'	'	'	$8,918,000	'	$11,276,000
Deferred loan origination costs	3,100,000	'	'	'	3,100,000	'	700,000
Impact of measurement adjustment on accretable yield beginning balance	'	1,000,000	'	300,000	'	'	'
Impact of measurement adjustment on accretion of income	'	900,000	'	1,100,000	'	'	'
CVR Expense	($776,000)	'	($179,000)	'	$2,535,000	($179,000)	'

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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Receivables [Abstract]	'	'	'	'
Balance, beginning of period	$444,481	$609,993	$553,348	$715,479
New loans purchased	'	'	'	'
Accretion of income	-39,625	-43,927	-126,634	-142,024
Reclassifications from nonaccretable difference	15,018	19,134	46,117	76,697
Disposals	-21,459	-35,160	-74,416	-100,112
Balance, end of period	$398,415	$550,040	$398,415	$550,040

Loans_Major_Categories_of_Loan

Loans - Major Categories of Loans (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Non-Covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	$4,162,555	$4,335,480
Non-Covered Loans [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	1,776,199	2,368,800
Non-Covered Loans [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	2,386,356	1,966,680
Non-Covered Loans [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	1,180,645	1,354,227
Non-Covered Loans [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	771,298	1,047,965
Non-Covered Loans [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	409,347	306,262
Non-Covered Loans [Member] | Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	1,652,826	1,630,344
Non-Covered Loans [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	462,484	620,350
Non-Covered Loans [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	1,190,342	1,009,994
Non-Covered Loans [Member] | Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	1,230,337	1,254,142
Non-Covered Loans [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	494,200	644,198
Non-Covered Loans [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	736,137	609,944
Non-Covered Loans [Member] | Other [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	98,747	96,767
Non-Covered Loans [Member] | Other [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	48,217	56,287
Non-Covered Loans [Member] | Other [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	50,530	40,480
Non-Covered Loans [Member] | Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	737,021	809,243
Non-Covered Loans [Member] | Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	476,248	628,234
Non-Covered Loans [Member] | Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	260,773	181,009
Non-Covered Loans [Member] | Other Commercial C&D [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	305,421	384,247
Non-Covered Loans [Member] | Other Commercial C&D [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	240,931	328,280
Non-Covered Loans [Member] | Other Commercial C&D [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	64,490	55,967
Non-Covered Loans [Member] | Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	62,190	73,224
Non-Covered Loans [Member] | Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	36,040	46,146
Non-Covered Loans [Member] | Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	26,150	27,078
Non-Covered Loans [Member] | 1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	76,013	87,513
Non-Covered Loans [Member] | 1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	18,079	45,305
Non-Covered Loans [Member] | 1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	57,934	42,208
Non-Covered Loans [Member] | Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	979,361	981,894
Non-Covered Loans [Member] | Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	321,684	425,869
Non-Covered Loans [Member] | Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	657,677	556,025
Non-Covered Loans [Member] | Commercial and Industrial [Member] | Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	670,911	648,450
Non-Covered Loans [Member] | Commercial and Industrial [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	140,800	194,481
Non-Covered Loans [Member] | Commercial and Industrial [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	530,111	453,969
Non-Covered Loans [Member] | Lease Financing [Member] | Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	2,554	'
Non-Covered Loans [Member] | Lease Financing [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	'	'
Non-Covered Loans [Member] | Lease Financing [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	2,554	'
Non-Covered Loans [Member] | 1-4 Family Residential [Member] | Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	739,068	746,744
Non-Covered Loans [Member] | 1-4 Family Residential [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	374,519	486,122
Non-Covered Loans [Member] | 1-4 Family Residential [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	364,549	260,622
Non-Covered Loans [Member] | Home Equity [Member] | Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	332,886	370,777
Non-Covered Loans [Member] | Home Equity [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	104,927	129,967
Non-Covered Loans [Member] | Home Equity [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	227,959	240,810
Non-Covered Loans [Member] | Consumer [Member] | Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	158,383	136,621
Non-Covered Loans [Member] | Consumer [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	14,754	28,109
Non-Covered Loans [Member] | Consumer [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Non-covered Loans	143,629	108,512
Covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	314,725	400,010
Covered Loans [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	276,427	355,834
Covered Loans [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	38,298	44,176
Covered Loans [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	97,989	142,475
Covered Loans [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	97,989	142,419
Covered Loans [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	56
Covered Loans [Member] | Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	84,604	101,063
Covered Loans [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	84,245	100,457
Covered Loans [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	359	606
Covered Loans [Member] | Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	131,101	152,108
Covered Loans [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	93,162	108,594
Covered Loans [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	37,939	43,514
Covered Loans [Member] | Other [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	1,031	4,364
Covered Loans [Member] | Other [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	1,031	4,364
Covered Loans [Member] | Other [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	'
Covered Loans [Member] | Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	66,933	94,972
Covered Loans [Member] | Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	66,933	94,916
Covered Loans [Member] | Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	56
Covered Loans [Member] | Other Commercial C&D [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	20,619	31,722
Covered Loans [Member] | Other Commercial C&D [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	20,619	31,722
Covered Loans [Member] | Other Commercial C&D [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	'
Covered Loans [Member] | Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	10,437	11,614
Covered Loans [Member] | Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	10,437	11,614
Covered Loans [Member] | Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	'
Covered Loans [Member] | 1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	4,167
Covered Loans [Member] | 1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	4,167
Covered Loans [Member] | 1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	'
Covered Loans [Member] | Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	73,633	84,006
Covered Loans [Member] | Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	73,633	84,006
Covered Loans [Member] | Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	'
Covered Loans [Member] | Commercial and Industrial [Member] | Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	10,971	17,057
Covered Loans [Member] | Commercial and Industrial [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	10,612	16,451
Covered Loans [Member] | Commercial and Industrial [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	359	606
Covered Loans [Member] | Lease Financing [Member] | Total Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	'
Covered Loans [Member] | Lease Financing [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	'
Covered Loans [Member] | Lease Financing [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	'
Covered Loans [Member] | 1-4 Family Residential [Member] | Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	77,847	91,813
Covered Loans [Member] | 1-4 Family Residential [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	77,055	91,586
Covered Loans [Member] | 1-4 Family Residential [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	792	227
Covered Loans [Member] | Home Equity [Member] | Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	53,185	60,110
Covered Loans [Member] | Home Equity [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	16,038	16,823
Covered Loans [Member] | Home Equity [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	37,147	43,287
Covered Loans [Member] | Consumer [Member] | Total Consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	69	185
Covered Loans [Member] | Consumer [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	69	185
Covered Loans [Member] | Consumer [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Covered Loans	'	'

Loans_Aging_of_Recorded_Invest

Loans - Aging of Recorded Investment in Past Due Loans, Based on Contractual Terms (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	$4,411,969	$4,666,952
PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	290,963	404,016
Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	17,758	22,098
Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	143,693	200,423
Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	3,467	1,014
Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	72,625	105,772
Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	5,015	5,312
Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	71,133	91,901
Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	9,265	15,723
Other [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	3,512	5,920
Other [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	11	49
Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	59,329	69,664
Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	295	80
Other Commercial C&D [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	76,859	113,166
Other Commercial C&D [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	591	97
Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	4,454	6,561
Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	'	'
1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	3,051	11,032
1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	2,581	837
Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	45,606	67,700
Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	2,425	2,371
Commercial and Industrial [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	27,019	38,072
Commercial and Industrial [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	2,590	2,941
Lease Financing [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	'	'
Lease Financing [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	'	'
1-4 Family Residential [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	60,035	72,354
1-4 Family Residential [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	1,766	5,379
Home Equity [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	10,173	17,840
Home Equity [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	5,242	8,103
Consumer [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	925	1,707
Consumer [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	2,257	2,241
Covered Loans [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	903	5,466
Greater than 90 Days Past Due and Still Accruing/Accreting	41,008	73,453
Nonaccrual	'	'
Covered Loans [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	402	1,614
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	1,256	2,792
Covered Loans [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	243	2,934
Greater than 90 Days Past Due and Still Accruing/Accreting	23,469	46,039
Nonaccrual	'	'
Covered Loans [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	56
Covered Loans [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	247	972
Greater than 90 Days Past Due and Still Accruing/Accreting	5,037	9,691
Nonaccrual	'	'
Covered Loans [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	66	276
Covered Loans [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	413	1,560
Greater than 90 Days Past Due and Still Accruing/Accreting	12,497	16,709
Nonaccrual	'	'
Covered Loans [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	402	1,614
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	1,190	2,460
Covered Loans [Member] | Other [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	5	1,014
Nonaccrual	'	'
Covered Loans [Member] | Other [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Covered Loans [Member] | Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	243	2,799
Greater than 90 Days Past Due and Still Accruing/Accreting	12,199	17,286
Nonaccrual	'	'
Covered Loans [Member] | Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	56
Covered Loans [Member] | Other Commercial C&D [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	135
Greater than 90 Days Past Due and Still Accruing/Accreting	10,313	21,659
Nonaccrual	'	'
Covered Loans [Member] | Other Commercial C&D [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Covered Loans [Member] | Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	957	3,612
Nonaccrual	'	'
Covered Loans [Member] | Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Covered Loans [Member] | 1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	3,482
Nonaccrual	'	'
Covered Loans [Member] | 1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Covered Loans [Member] | Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	247	873
Greater than 90 Days Past Due and Still Accruing/Accreting	4,870	7,646
Nonaccrual	'	'
Covered Loans [Member] | Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Covered Loans [Member] | Commercial and Industrial [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	99
Greater than 90 Days Past Due and Still Accruing/Accreting	167	2,045
Nonaccrual	'	'
Covered Loans [Member] | Commercial and Industrial [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	66	276
Covered Loans [Member] | Lease Financing [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Covered Loans [Member] | Lease Financing [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Covered Loans [Member] | 1-4 Family Residential [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	374	1,214
Greater than 90 Days Past Due and Still Accruing/Accreting	10,643	13,685
Nonaccrual	'	'
Covered Loans [Member] | 1-4 Family Residential [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Covered Loans [Member] | Home Equity [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	39	345
Greater than 90 Days Past Due and Still Accruing/Accreting	1,821	3,024
Nonaccrual	'	'
Covered Loans [Member] | Home Equity [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	402	1,614
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	1,190	2,460
Covered Loans [Member] | Consumer [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	1
Greater than 90 Days Past Due and Still Accruing/Accreting	33	'
Nonaccrual	'	'
Covered Loans [Member] | Consumer [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Non-Covered Loans [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	28,590	46,480
Greater than 90 Days Past Due and Still Accruing/Accreting	220,462	278,617
Nonaccrual	'	'
Non-Covered Loans [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	3,533	6,473
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	12,567	11,219
Non-Covered Loans [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	10,607	14,444
Greater than 90 Days Past Due and Still Accruing/Accreting	109,374	137,006
Nonaccrual	'	'
Non-Covered Loans [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	351	474
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	3,116	484
Non-Covered Loans [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	7,421	8,131
Greater than 90 Days Past Due and Still Accruing/Accreting	59,920	86,978
Nonaccrual	'	'
Non-Covered Loans [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	185	1,013
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	4,764	4,023
Non-Covered Loans [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	10,124	20,987
Greater than 90 Days Past Due and Still Accruing/Accreting	48,099	52,645
Nonaccrual	'	'
Non-Covered Loans [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	2,997	4,937
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	4,676	6,712
Non-Covered Loans [Member] | Other [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	438	2,918
Greater than 90 Days Past Due and Still Accruing/Accreting	3,069	1,988
Nonaccrual	'	'
Non-Covered Loans [Member] | Other [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	49
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	11	'
Non-Covered Loans [Member] | Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	4,847	4,662
Greater than 90 Days Past Due and Still Accruing/Accreting	42,040	44,917
Nonaccrual	'	'
Non-Covered Loans [Member] | Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	201	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	94	24
Non-Covered Loans [Member] | Other Commercial C&D [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	5,631	7,183
Greater than 90 Days Past Due and Still Accruing/Accreting	60,915	84,189
Nonaccrual	'	'
Non-Covered Loans [Member] | Other Commercial C&D [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	150	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	441	97
Non-Covered Loans [Member] | Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	119	194
Greater than 90 Days Past Due and Still Accruing/Accreting	3,378	2,755
Nonaccrual	'	'
Non-Covered Loans [Member] | Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Non-Covered Loans [Member] | 1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	10	2,405
Greater than 90 Days Past Due and Still Accruing/Accreting	3,041	5,145
Nonaccrual	'	'
Non-Covered Loans [Member] | 1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	474
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	2,581	363
Non-Covered Loans [Member] | Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	3,353	4,210
Greater than 90 Days Past Due and Still Accruing/Accreting	37,136	54,971
Nonaccrual	'	'
Non-Covered Loans [Member] | Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	173	405
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	2,252	1,966
Non-Covered Loans [Member] | Commercial and Industrial [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	4,068	3,921
Greater than 90 Days Past Due and Still Accruing/Accreting	22,784	32,007
Nonaccrual	'	'
Non-Covered Loans [Member] | Commercial and Industrial [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	12	608
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	2,512	2,057
Non-Covered Loans [Member] | Lease Financing [Member] | Total Commercial [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Non-Covered Loans [Member] | Lease Financing [Member] | Total Commercial [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	'	'
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	'	'
Non-Covered Loans [Member] | 1-4 Family Residential [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	8,010	15,550
Greater than 90 Days Past Due and Still Accruing/Accreting	41,008	41,905
Nonaccrual	'	'
Non-Covered Loans [Member] | 1-4 Family Residential [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	814	1,648
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	952	3,731
Non-Covered Loans [Member] | Home Equity [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	1,602	4,224
Greater than 90 Days Past Due and Still Accruing/Accreting	6,711	10,247
Nonaccrual	'	'
Non-Covered Loans [Member] | Home Equity [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	731	1,416
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	2,919	2,613
Non-Covered Loans [Member] | Consumer [Member] | Total Consumer [Member] | PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	512	1,213
Greater than 90 Days Past Due and Still Accruing/Accreting	380	493
Nonaccrual	'	'
Non-Covered Loans [Member] | Consumer [Member] | Total Consumer [Member] | Non-PCI Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
30-89 Days Past Due	1,452	1,873
Greater than 90 Days Past Due and Still Accruing/Accreting	'	'
Nonaccrual	$805	$368

Loans_Loans_Excluding_Purchase

Loans - Loans, Excluding Purchased Credit-Impaired Loans, Monitored for Credit Quality Based on Internal Ratings (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	$2,424,654	$2,010,856
Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,390,476	1,967,657
Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	8,550	6,157
Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	11,805	23,031
Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	13,823	14,011
Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	409,347	306,318
Total Commercial Real Estate [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	399,036	301,260
Total Commercial Real Estate [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,875	485
Total Commercial Real Estate [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	4,320	4,032
Total Commercial Real Estate [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	3,116	541
Total Commercial Real Estate [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial Real Estate [Member] | Non-owner Occupied Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	260,773	181,065
Total Commercial Real Estate [Member] | Non-owner Occupied Commercial Real Estate [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	259,151	180,080
Total Commercial Real Estate [Member] | Non-owner Occupied Commercial Real Estate [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	644	'
Total Commercial Real Estate [Member] | Non-owner Occupied Commercial Real Estate [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	884	905
Total Commercial Real Estate [Member] | Non-owner Occupied Commercial Real Estate [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	94	80
Total Commercial Real Estate [Member] | Non-owner Occupied Commercial Real Estate [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial Real Estate [Member] | Other Commercial C&D [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	64,490	55,967
Total Commercial Real Estate [Member] | Other Commercial C&D [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	63,233	55,394
Total Commercial Real Estate [Member] | Other Commercial C&D [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	666	325
Total Commercial Real Estate [Member] | Other Commercial C&D [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	150	150
Total Commercial Real Estate [Member] | Other Commercial C&D [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	441	98
Total Commercial Real Estate [Member] | Other Commercial C&D [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial Real Estate [Member] | Multifamily Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	26,150	27,078
Total Commercial Real Estate [Member] | Multifamily Commercial Real Estate [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	25,842	26,760
Total Commercial Real Estate [Member] | Multifamily Commercial Real Estate [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial Real Estate [Member] | Multifamily Commercial Real Estate [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	308	318
Total Commercial Real Estate [Member] | Multifamily Commercial Real Estate [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial Real Estate [Member] | Multifamily Commercial Real Estate [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial Real Estate [Member] | 1-4 Family Residential C&D [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	57,934	42,208
Total Commercial Real Estate [Member] | 1-4 Family Residential C&D [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	50,810	39,026
Total Commercial Real Estate [Member] | 1-4 Family Residential C&D [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	1,565	160
Total Commercial Real Estate [Member] | 1-4 Family Residential C&D [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,978	2,659
Total Commercial Real Estate [Member] | 1-4 Family Residential C&D [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,581	363
Total Commercial Real Estate [Member] | 1-4 Family Residential C&D [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	1,190,701	1,010,600
Total Commercial [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	1,175,452	986,410
Total Commercial [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	5,408	4,423
Total Commercial [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	5,011	15,468
Total Commercial [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	4,830	4,299
Total Commercial [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial [Member] | Owner Occupied Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	657,677	556,025
Total Commercial [Member] | Owner Occupied Commercial Real Estate [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	653,194	548,506
Total Commercial [Member] | Owner Occupied Commercial Real Estate [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	2,953
Total Commercial [Member] | Owner Occupied Commercial Real Estate [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,231	2,600
Total Commercial [Member] | Owner Occupied Commercial Real Estate [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,252	1,966
Total Commercial [Member] | Owner Occupied Commercial Real Estate [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	530,470	454,575
Total Commercial [Member] | Commercial and Industrial [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	519,704	437,904
Total Commercial [Member] | Commercial and Industrial [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	5,408	1,470
Total Commercial [Member] | Commercial and Industrial [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,780	12,868
Total Commercial [Member] | Commercial and Industrial [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,578	2,333
Total Commercial [Member] | Commercial and Industrial [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial [Member] | Lease Financing [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,554	'
Total Commercial [Member] | Lease Financing [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,554	'
Total Commercial [Member] | Lease Financing [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial [Member] | Lease Financing [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial [Member] | Lease Financing [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Commercial [Member] | Lease Financing [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Consumer [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	774,076	653,458
Total Consumer [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	765,743	639,556
Total Consumer [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	267	1,200
Total Consumer [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,200	3,531
Total Consumer [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	5,866	9,171
Total Consumer [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Consumer [Member] | 1-4 Family Residential [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	365,341	260,849
Total Consumer [Member] | 1-4 Family Residential [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	364,359	256,805
Total Consumer [Member] | 1-4 Family Residential [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	30	313
Total Consumer [Member] | 1-4 Family Residential [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Consumer [Member] | 1-4 Family Residential [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	952	3,731
Total Consumer [Member] | 1-4 Family Residential [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Consumer [Member] | Home Equity [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	265,106	284,097
Total Consumer [Member] | Home Equity [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	258,591	274,827
Total Consumer [Member] | Home Equity [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	237	777
Total Consumer [Member] | Home Equity [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,169	3,420
Total Consumer [Member] | Home Equity [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	4,109	5,073
Total Consumer [Member] | Home Equity [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Total Consumer [Member] | Consumer [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	143,629	108,512
Total Consumer [Member] | Consumer [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	142,793	107,924
Total Consumer [Member] | Consumer [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	110
Total Consumer [Member] | Consumer [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	31	111
Total Consumer [Member] | Consumer [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	805	367
Total Consumer [Member] | Consumer [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'
Other [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	50,530	40,480
Other [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	50,245	40,431
Other [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	49
Other [Member] | Substandard Accruing/Accreting [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	274	'
Other [Member] | Substandard Nonaccrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	11	'
Other [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	'

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, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Allowance For Loan And Lease Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	$56,832	'	$57,262	'	$45,472	$57,262	$34,749
Provision (Reversal) for loan losses	984	3,868	6,904	4,370	5,771	10,853	17,755
Balance, end of period	56,393	56,832	'	57,262	51,587	56,393	51,587
PCI Loans [Member]	'	'	'	'	'	'	'
Allowance For Loan And Lease Losses [Line Items]	'	'	'	'	'	'	'
Provision (Reversal) for loan losses	-72	'	'	'	4,698	-703	12,050
Loans charged off	'	'	'	'	'	'	'
Recoveries of loans previously charged off	'	'	'	'	'	'	'
Non-PCI Loans [Member]	'	'	'	'	'	'	'
Allowance For Loan And Lease Losses [Line Items]	'	'	'	'	'	'	'
Provision (Reversal) for loan losses	1,056	'	'	'	1,073	11,556	5,705
Loans charged off	-1,945	'	'	'	-824	-15,335	-3,690
Recoveries of loans previously charged off	$522	'	'	'	$1,168	$3,613	$2,773

Allowance_for_Loan_Losses_Roll

Allowance for Loan Losses - Roll Forward of Allowance for Loan Losses (Detail) (USD $)	3 Months Ended					9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	$56,832	'	$57,262	'	$45,472	$57,262	$34,749
Provision / (Reversals)	984	3,868	6,904	4,370	5,771	10,853	17,755
Net (Charge- offs)/Recoveries	-1,423	'	'	'	344	-11,722	-917
Balance, end of period	56,393	56,832	'	57,262	51,587	56,393	51,587
Total Commercial Real Estate [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	18,703	'	18,539	'	14,573	18,539	12,800
Provision / (Reversals)	1,540	'	'	'	3,942	1,149	4,986
Net (Charge- offs)/Recoveries	98	'	'	'	283	653	1,012
Balance, end of period	20,341	'	'	'	18,798	20,341	18,798
Total Commercial [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	12,984	'	11,545	'	9,507	11,545	9,620
Provision / (Reversals)	96	'	'	'	543	9,620	270
Net (Charge- offs)/Recoveries	-449	'	'	'	223	-8,534	383
Balance, end of period	12,631	'	'	'	10,273	12,631	10,273
Total Consumer [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	23,870	'	26,492	'	20,784	26,492	11,557
Provision / (Reversals)	-346	'	'	'	2,181	-992	12,441
Net (Charge- offs)/Recoveries	-634	'	'	'	-840	-2,610	-1,873
Balance, end of period	22,890	'	'	'	22,125	22,890	22,125
Other [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	1,275	'	686	'	608	686	772
Provision / (Reversals)	-306	'	'	'	-895	1,076	58
Net (Charge- offs)/Recoveries	-438	'	'	'	678	-1,231	-439
Balance, end of period	531	'	'	'	391	531	391
Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	4,329	'	3,764	'	2,154	3,764	3,854
Provision / (Reversals)	2,344	'	'	'	1,434	2,936	-1,028
Net (Charge- offs)/Recoveries	11	'	'	'	4	-16	766
Balance, end of period	6,684	'	'	'	3,592	6,684	3,592
Other Commercial C&D [Member] | Total Commercial Real Estate [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	12,310	'	12,711	'	10,944	12,711	7,627
Provision / (Reversals)	-1,201	'	'	'	2,004	-2,120	5,354
Net (Charge- offs)/Recoveries	85	'	'	'	278	603	245
Balance, end of period	11,194	'	'	'	13,226	11,194	13,226
Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	258	'	348	'	210	348	398
Provision / (Reversals)	44	'	'	'	-25	-87	-213
Net (Charge- offs)/Recoveries	'	'	'	'	'	41	'
Balance, end of period	302	'	'	'	185	302	185
1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	1,806	'	1,716	'	1,265	1,716	921
Provision / (Reversals)	353	'	'	'	529	420	873
Net (Charge- offs)/Recoveries	2	'	'	'	1	25	1
Balance, end of period	2,161	'	'	'	1,795	2,161	1,795
Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	4,696	'	4,055	'	4,783	4,055	5,454
Provision / (Reversals)	357	'	'	'	-1,126	732	-1,811
Net (Charge- offs)/Recoveries	17	'	'	'	237	283	251
Balance, end of period	5,070	'	'	'	3,894	5,070	3,894
Commercial and Industrial [Member] | Total Commercial [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	8,288	'	7,490	'	4,724	7,490	4,166
Provision / (Reversals)	-264	'	'	'	1,669	8,885	2,081
Net (Charge- offs)/Recoveries	-466	'	'	'	-14	-8,817	132
Balance, end of period	7,558	'	'	'	6,379	7,558	6,379
Lease Financing [Member] | Total Commercial [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	'	'	'	'	'	'	'
Provision / (Reversals)	3	'	'	'	'	3	'
Net (Charge- offs)/Recoveries	'	'	'	'	'	'	'
Balance, end of period	3	'	'	'	'	3	'
1-4 Family Residential [Member] | Total Consumer [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	17,572	'	15,740	'	12,050	15,740	7,252
Provision / (Reversals)	-1,040	'	'	'	1,554	772	6,304
Net (Charge- offs)/Recoveries	51	'	'	'	35	71	83
Balance, end of period	16,583	'	'	'	13,639	16,583	13,639
Home Equity [Member] | Total Consumer [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	3,937	'	8,670	'	6,998	8,670	2,711
Provision / (Reversals)	-40	'	'	'	-4	-3,861	5,016
Net (Charge- offs)/Recoveries	-120	'	'	'	-469	-1,032	-1,202
Balance, end of period	3,777	'	'	'	6,525	3,777	6,525
Consumer [Member] | Total Consumer [Member]	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'
Balance, beginning of period	2,361	'	2,082	'	1,736	2,082	1,594
Provision / (Reversals)	734	'	'	'	631	2,097	1,121
Net (Charge- offs)/Recoveries	-565	'	'	'	-406	-1,649	-754
Balance, end of period	$2,530	'	'	'	$1,961	$2,530	$1,961

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, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Individually Evaluated for Impairment	$65	$38
Allowance for Loan Losses, Collectively Evaluated for Impairment	17,211	17,404
Allowance for Loan Losses, Purchased Credit-Impaired	39,117	39,820
Loans, Individually Evaluated for Impairment	2,333	4,909
Loans, Collectively Evaluated for Impairment	2,413,403	1,994,671
Loans, Purchased Credit-Impaired	2,052,626	2,724,634
Total Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	4,267	4,343
Allowance for Loan Losses, Purchased Credit-Impaired	16,074	14,196
Loans, Collectively Evaluated for Impairment	409,347	306,318
Loans, Purchased Credit-Impaired	869,287	1,190,384
Total Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Individually Evaluated for Impairment	64	38
Allowance for Loan Losses, Collectively Evaluated for Impairment	7,841	8,825
Allowance for Loan Losses, Purchased Credit-Impaired	4,726	2,682
Loans, Individually Evaluated for Impairment	2,318	1,756
Loans, Collectively Evaluated for Impairment	1,188,383	1,008,844
Loans, Purchased Credit-Impaired	546,729	720,807
Total Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Individually Evaluated for Impairment	1	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	4,727	3,859
Allowance for Loan Losses, Purchased Credit-Impaired	18,162	22,633
Loans, Individually Evaluated for Impairment	15	3,153
Loans, Collectively Evaluated for Impairment	765,143	639,029
Loans, Purchased Credit-Impaired	587,362	752,792
Other [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	376	377
Allowance for Loan Losses, Purchased Credit-Impaired	155	309
Loans, Collectively Evaluated for Impairment	50,530	40,480
Loans, Purchased Credit-Impaired	49,248	60,651
Non-owner Occupied Commercial Real Estate [Member] | Total Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,399	1,461
Allowance for Loan Losses, Purchased Credit-Impaired	5,285	2,303
Loans, Collectively Evaluated for Impairment	260,773	181,065
Loans, Purchased Credit-Impaired	543,181	723,150
Other Commercial C&D [Member] | Total Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,644	1,810
Allowance for Loan Losses, Purchased Credit-Impaired	9,550	10,901
Loans, Collectively Evaluated for Impairment	64,490	55,967
Loans, Purchased Credit-Impaired	261,550	360,002
Multifamily Commercial Real Estate [Member] | Total Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	109	129
Allowance for Loan Losses, Purchased Credit-Impaired	193	219
Loans, Collectively Evaluated for Impairment	26,150	27,078
Loans, Purchased Credit-Impaired	46,477	57,760
1-4 Family Residential C&D [Member] | Total Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,115	943
Allowance for Loan Losses, Purchased Credit-Impaired	1,046	773
Loans, Collectively Evaluated for Impairment	57,934	42,208
Loans, Purchased Credit-Impaired	18,079	49,472
Owner Occupied Commercial Real Estate [Member] | Total Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Individually Evaluated for Impairment	'	38
Allowance for Loan Losses, Collectively Evaluated for Impairment	2,572	2,905
Allowance for Loan Losses, Purchased Credit-Impaired	2,498	1,112
Loans, Individually Evaluated for Impairment	'	1,756
Loans, Collectively Evaluated for Impairment	657,677	554,269
Loans, Purchased Credit-Impaired	395,317	509,875
Commercial and Industrial [Member] | Total Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Individually Evaluated for Impairment	64	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	5,266	5,920
Allowance for Loan Losses, Purchased Credit-Impaired	2,228	1,570
Loans, Individually Evaluated for Impairment	2,318	'
Loans, Collectively Evaluated for Impairment	528,152	454,575
Loans, Purchased Credit-Impaired	151,412	210,932
Lease Financing [Member] | Total Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Individually Evaluated for Impairment	'	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	3	'
Allowance for Loan Losses, Purchased Credit-Impaired	'	'
Loans, Individually Evaluated for Impairment	'	'
Loans, Collectively Evaluated for Impairment	2,554	'
Loans, Purchased Credit-Impaired	'	'
1-4 Family Residential [Member] | Total Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	2,217	1,915
Allowance for Loan Losses, Purchased Credit-Impaired	14,366	13,825
Loans, Individually Evaluated for Impairment	'	3,153
Loans, Collectively Evaluated for Impairment	356,423	246,420
Loans, Purchased Credit-Impaired	451,574	577,708
Home Equity [Member] | Total Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	358	376
Allowance for Loan Losses, Purchased Credit-Impaired	3,419	8,294
Loans, Collectively Evaluated for Impairment	265,106	284,097
Loans, Purchased Credit-Impaired	120,965	146,790
Consumer [Member] | Total Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance for Loan Losses, Individually Evaluated for Impairment	1	'
Allowance for Loan Losses, Collectively Evaluated for Impairment	2,152	1,568
Allowance for Loan Losses, Purchased Credit-Impaired	377	514
Loans, Individually Evaluated for Impairment	15	'
Loans, Collectively Evaluated for Impairment	143,614	108,512
Loans, Purchased Credit-Impaired	$14,823	$28,294

Allowance_for_Loan_Losses_Summ1

Allowance for Loan Losses - Summary of Allowance for Loan Losses and Recorded Investment in Loans by Class of Loans and by Impairment Evaluation (Parenthetical) (Detail) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Receivables [Abstract]	'
Loans collectively evaluated for impairment	$459.50
Loans collectively evaluated for impairment, unamortized purchase discounts (Premium)	$12.10

FDIC_Indemnification_Asset_Add

FDIC Indemnification Asset - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
	Agreement
Fdic Indemnification Asset [Abstract]	'
Percentage future credit losses and workout expenses to be absorbed by FDIC	80.00%
Single family shared loss agreement number	3
Commercial and other loans shared agreement number	3
Single family shared loss agreement period	'10 years
Commercial and other loans shared agreement period	'5 years
Recovery period to FDIC for other covered assets	'8 years

FDIC_Indemnification_Asset_Sch

FDIC Indemnification Asset - Schedule of FDIC Indemnification Asset (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Fdic Indemnification Asset [Abstract]	'	'
FDIC Indemnification Asset, Beginning Balance	$49,417	$66,282
Indemnification asset income	2,003	7,850
Amortization on indemnification asset	-5,782	-6,842
Reimbursable losses claimed	-8,801	-10,746
FDIC Indemnification Asset, Ending Balance	$36,837	$56,544

Other_Real_Estate_Owned_Additi

Other Real Estate Owned - Additional Information (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Millions, unless otherwise specified
Banking And Thrift [Abstract]	'	'
Ending balances for OREO covered by FDIC	$27.30	$39.60
Ending balances for OREO non-covered	$102.40	$105

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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Banking And Thrift [Abstract]	'	'	'	'
Balance, beginning of period	$142,793	$158,235	$154,093	$168,781
Real estate acquired from borrowers	10,585	23,233	53,366	65,530
Valuation expense	-6,045	-8,633	-18,844	-15,529
(Loss) gain on sale of properties	-188	1,514	3,204	3,937
Properties sold and other	-17,491	-29,728	-62,165	-78,098
Balance, end of period	$129,654	$144,621	$129,654	$144,621

Federal_Home_Loan_Bank_Advance2

Federal Home Loan Bank Advances and Short-Term Borrowings - Additional Information (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]	'	'
Short-term borrowings	$23,224,000	$41,508,000
Letters of credit issued by the Federal Home Loan Bank	25,600,000	25,500,000
Letter of credit in lieu of pledging securities	25,200,000	25,200,000
Contractual outstanding balance of FHLB advance	1,300,000	1,500,000
Amount of eligible collateral provided for incremental borrowing	$190,100,000	'

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, 2013	Dec. 31, 2012
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Contractual Outstanding Amount	$1,324	$1,460
0.50% [Member]	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Contractual Outstanding Amount	760	867
Maturity Date	'2017-11	'2017-11
Repricing Frequency	'Fixed	'Fixed
Contractual Rate	0.50%	0.50%
0.00% [Member]	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Contractual Outstanding Amount	$564	$593
Maturity Date	'2026-02	'2026-02
Repricing Frequency	'Fixed	'Fixed
Contractual Rate	0.00%	0.00%

Long_Term_Borrowings_Additiona

Long Term Borrowings - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended			1 Months Ended	0 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Mar. 18, 2013	Sep. 07, 2013	Sep. 30, 2013
			Trust_Preferred_Securities			Collateralized Mortgage-Backed Securities [Member]	Collateralized Mortgage-Backed Securities [Member]	Trust Preferred Securities [Member]	Subordinated Debt 2 [Member]	Subordinated Debt 1 [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'	'
Contractual amounts with carrying value	'	'	$50,000,000	'	$50,000,000	'	'	'	'	'
Outstanding structured repurchase agreements	53,679,000	'	53,679,000	'	54,354,000	'	'	'	'	'
Weighted-average rate of repurchase agreements	'	'	4.06%	'	4.06%	'	'	'	'	'
Collateralized mortgage-backed securities	'	'	'	'	'	64,300,000	66,500,000	'	'	'
No. of trust preferred securities acquired	'	'	12	'	'	'	'	'	'	'
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	'	'	'	'	'	'	'	7.95%	10.60%	10.00%
Loss on extinguishment of debt	-430,000	2,946,000	-122,000	3,267,000	'	'	'	300,000	400,000	'
Subordinated promissory notes	3,400,000	'	3,400,000	'	'	'	'	'	'	'
Subordinated promissory notes, due date	'	'	18-Mar-20	'	'	'	'	'	'	'
Carrying value of promissory notes	'	'	$3,600,000	'	$3,600,000	'	'	'	'	'

Long_Term_Borrowings_Schedule_

Long Term Borrowings - Schedule of Outstanding Structured Repurchase Agreements (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	$53,679	$54,354
Contractual Amount	50,000	50,000
4.75% [Member]	'	'
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	10,894	11,102
Contractual Amount	10,000	10,000
Maturity Date	'November 6, 2016	'November 6, 2016
Rate	4.75%	4.75%
3.72% [Member]	'	'
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	10,521	10,608
Contractual Amount	10,000	10,000
Maturity Date	'December 18, 2017	'December 18, 2017
Rate	3.72%	3.72%
4.50% [Member]	'	'
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	10,896	11,080
Contractual Amount	10,000	10,000
Maturity Date	'March 30, 2017	'March 30, 2017
Rate	4.50%	4.50%
3.79% [Member]	'	'
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	10,552	10,644
Contractual Amount	10,000	10,000
Maturity Date	'December 18, 2017	'December 18, 2017
Rate	3.79%	3.79%
3.56% [Member]	'	'
Assets Sold under Agreements to Repurchase [Line Items]	'	'
Carrying Amount	10,816	10,920
Contractual Amount	$10,000	$10,000
Maturity Date	'March 22, 2019	'March 22, 2019
Rate	3.56%	3.56%

Long_Term_Borrowings_Summary_o

Long Term Borrowings - Summary of Subordinated Debentures (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Debt Instrument [Line Items]	'	'
Original Face Amount	$193,500	'
Carrying Amount	81,052	122,503
Subordinated Debt 1 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'September 7, 2000	'
Original Face Amount	8,000	'
Carrying Amount	'	8,762
Call Date	'September 7, 2010	'
Maturity Date	'September 7, 2030	'
Subordinated Debt 2 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'July 31, 2001	'
Original Face Amount	5,000	'
Carrying Amount	3,840	3,795
Debt Instrument, variable interest rate	'3.85% (3 Month LIBOR plus 358 basis points)	'
Call Date	'July 31, 2006	'
Maturity Date	'July 31, 2031	'
Subordinated Debt 3 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'July 31, 2001	'
Original Face Amount	4,000	'
Carrying Amount	2,620	2,573
Debt Instrument, variable interest rate	'3.85% (3 Month LIBOR plus 358 basis points)	'
Call Date	'July 31, 2006	'
Maturity Date	'July 31, 2031	'
Subordinated Debt 4 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'June 26, 2003	'
Original Face Amount	10,000	'
Carrying Amount	5,898	5,832
Debt Instrument, variable interest rate	'3.35% (3 Month LIBOR plus 310 basis points)	'
Call Date	'June 26, 2008	'
Maturity Date	'June 26, 2033	'
Subordinated Debt 5 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'September 25, 2003	'
Original Face Amount	10,000	'
Carrying Amount	6,331	6,222
Debt Instrument, variable interest rate	'3.12% (3 Month LIBOR plus 285 basis points)	'
Call Date	'September 25, 2008	'
Maturity Date	'September 25, 2033	'
Subordinated Debt 6 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'November 10, 2003	'
Original Face Amount	34,500	'
Carrying Amount	'	34,189
Call Date	'November 10, 2008	'
Maturity Date	'December 31, 2033	'
Subordinated Debt 7 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'December 30, 2003	'
Original Face Amount	10,000	'
Carrying Amount	5,681	5,614
Debt Instrument, variable interest rate	'3.12% (3 Month LIBOR plus 285 basis points)	'
Call Date	'December 30, 2008	'
Maturity Date	'December 30, 2033	'
Subordinated Debt 8 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'June 28, 2005	'
Original Face Amount	3,000	'
Carrying Amount	1,533	1,497
Debt Instrument, variable interest rate	'1.93% (3 Month LIBOR plus 168 basis points)	'
Call Date	'June 28, 2010	'
Maturity Date	'June 28, 2035	'
Subordinated Debt 9 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'December 22, 2005	'
Original Face Amount	10,000	'
Carrying Amount	4,463	4,383
Debt Instrument, variable interest rate	'1.65% (3 Month LIBOR plus 140 basis points)	'
Call Date	'December 22, 2010	'
Maturity Date	'March 15, 2036	'
Subordinated Debt 10 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'December 28, 2005	'
Original Face Amount	13,000	'
Carrying Amount	6,407	6,255
Debt Instrument, variable interest rate	'1.79% (3 Month LIBOR plus 154 basis points)	'
Call Date	'December 28, 2010	'
Maturity Date	'March 15, 2036	'
Subordinated Debt 11 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'June 23, 2006	'
Original Face Amount	20,000	'
Carrying Amount	11,137	10,918
Debt Instrument, variable interest rate	'1.82% (3 Month LIBOR plus 155 basis points)	'
Call Date	'June 23, 2011	'
Maturity Date	'July 7, 2036	'
Subordinated Debt 12 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'May 16, 2007	'
Original Face Amount	56,000	'
Carrying Amount	27,840	27,220
Debt Instrument, variable interest rate	'1.90% (3 Month LIBOR plus 165 basis points)	'
Call Date	'May 16, 2012	'
Maturity Date	'May 16, 2037	'
Subordinated Debt 13 [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Offering	'June 15, 2007	'
Original Face Amount	10,000	'
Carrying Amount	$5,302	$5,243
Debt Instrument, variable interest rate	'1.69% (3 Month LIBOR plus 143 basis points)	'
Call Date	'June 15, 2012	'
Maturity Date	'September 6, 2037	'

Long_Term_Borrowings_Summary_o1

Long Term Borrowings - Summary of Subordinated Debentures (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2013
Subordinated Debt 2 [Member]	'
Debt Instrument [Line Items]	'
Subordinated debt interest rate	3.85%
Subordinated debt variable interest rate, basis points	3.58%
Subordinated Debt 3 [Member]	'
Debt Instrument [Line Items]	'
Subordinated debt interest rate	3.85%
Subordinated debt variable interest rate, basis points	3.58%
Subordinated Debt 4 [Member]	'
Debt Instrument [Line Items]	'
Subordinated debt interest rate	3.35%
Subordinated debt variable interest rate, basis points	3.10%
Subordinated Debt 5 [Member]	'
Debt Instrument [Line Items]	'
Subordinated debt interest rate	3.12%
Subordinated debt variable interest rate, basis points	2.85%
Subordinated Debt 7 [Member]	'
Debt Instrument [Line Items]	'
Subordinated debt interest rate	3.12%
Subordinated debt variable interest rate, basis points	2.85%
Subordinated Debt 8 [Member]	'
Debt Instrument [Line Items]	'
Subordinated debt interest rate	1.93%
Subordinated debt variable interest rate, basis points	1.68%
Subordinated Debt 9 [Member]	'
Debt Instrument [Line Items]	'
Subordinated debt interest rate	1.65%
Subordinated debt variable interest rate, basis points	1.40%
Subordinated Debt 10 [Member]	'
Debt Instrument [Line Items]	'
Subordinated debt interest rate	1.79%
Subordinated debt variable interest rate, basis points	1.54%
Subordinated Debt 11 [Member]	'
Debt Instrument [Line Items]	'
Subordinated debt interest rate	1.82%
Subordinated debt variable interest rate, basis points	1.55%
Subordinated Debt 12 [Member]	'
Debt Instrument [Line Items]	'
Subordinated debt interest rate	1.90%
Subordinated debt variable interest rate, basis points	1.65%
Subordinated Debt 13 [Member]	'
Debt Instrument [Line Items]	'
Subordinated debt interest rate	1.69%
Subordinated debt variable interest rate, basis points	1.43%

Long_Term_Borrowings_Schedule_1

Long Term Borrowings - Schedule of Maturities of Long-Term Borrowings (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Due in 2014 through 2015	'	'
Due in 2013 through 2015	'	'
Due in 2016	10,894	11,102
Due in 2017	31,969	32,332
Due in 2018	'	'
Thereafter	95,427	136,996
Total long-term debt	138,290	180,430
Fixed Rate [Member]	'	'
Debt Instrument [Line Items]	'	'
Due in 2014 through 2015	'	'
Due in 2013 through 2015	'	'
Due in 2016	10,894	11,102
Due in 2017	31,969	32,332
Due in 2018	'	'
Thereafter	14,375	57,444
Total long-term debt	57,238	100,878
Floating Rate [Member]	'	'
Debt Instrument [Line Items]	'	'
Due in 2014 through 2015	'	'
Due in 2013 through 2015	'	'
Due in 2016	'	'
Due in 2017	'	'
Due in 2018	'	'
Thereafter	81,052	79,552
Total long-term debt	$81,052	$79,552

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, 2013	Dec. 31, 2012	Aug. 31, 2010
In Thousands, unless otherwise specified
Consolidated [Member]	'	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'	'
Actual Tier 1 Capital (to Average Assets) amount	$928,770	$964,309	'
Actual, Tier 1 Capital (to Average Assets)	14.50%	13.70%	'
Actual Tier 1 Capital (to Risk Weighted Assets) amount	928,770	964,309	'
Actual, Tier 1 Capital (to Risk Weighted Assets)	19.70%	19.90%	'
Actual Total Capital (to Risk Weighted Assets) amount	989,088	1,025,545	'
Actual, Total Capital (to Risk Weighted Assets)	21.00%	21.20%	'
Consolidated [Member] | Minimum [Member]	'	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'	'
Adequately Capitalized Requirement Tier 1 Capital (to Average Assets) amount	256,831	282,575	'
Adequately Capitalized Requirement, Tier 1 Capital (to Average Assets)	4.00%	4.00%	'
Adequately Capitalized Requirement Tier 1 Capital (to Risk Weighted Assets) amount	188,340	193,640	'
Adequately Capitalized Requirement, Tier 1 Capital (to Risk Weighted Assets)	4.00%	4.00%	'
Adequately Capitalized Requirement Total Capital (to Risk Weighted Assets) amount	376,679	387,281	'
Adequately Capitalized Requirement, Total Capital (to Risk Weighted Assets)	8.00%	8.00%	'
Capital Bank, NA [Member]	'	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'	'
Actual Tier 1 Capital (to Average Assets) amount	820,704	850,472	'
Actual, Tier 1 Capital (to Average Assets)	12.80%	12.00%	'
Actual Tier 1 Capital (to Risk Weighted Assets) amount	820,704	850,472	'
Actual, Tier 1 Capital (to Risk Weighted Assets)	17.40%	17.60%	'
Actual Total Capital (to Risk Weighted Assets) amount	880,856	911,528	'
Actual, Total Capital (to Risk Weighted Assets)	18.70%	18.80%	'
Capital Bank, NA [Member] | Minimum [Member]	'	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'	'
Well Capitalized Requirement Tier 1 Capital (to Average Assets) amount	321,016	353,323	'
Well Capitalized Requirement, Tier 1 Capital (to Average Assets)	5.00%	5.00%	'
Adequately Capitalized Requirement Tier 1 Capital (to Average Assets) amount	256,813	282,659	'
Adequately Capitalized Requirement, Tier 1 Capital (to Average Assets)	4.00%	4.00%	'
Actual, Tier 1 Capital (to Average Assets)	'	'	10.00%
Well Capitalized Requirement Tier 1 Capital (to Risk Weighted Assets) amount	282,524	290,349	'
Well Capitalized Requirement, Tier 1 Capital (to Risk Weighted Assets)	6.00%	6.00%	'
Adequately Capitalized Requirement Tier 1 Capital (to Risk Weighted Assets) amount	188,350	193,566	'
Adequately Capitalized Requirement, Tier 1 Capital (to Risk Weighted Assets)	4.00%	4.00%	'
Actual, Tier 1 Capital (to Risk Weighted Assets)	'	'	11.00%
Well Capitalized Requirement Total Capital (to Risk Weighted Assets) amount	470,874	483,915	'
Well Capitalized Requirement, Total Capital (to Risk Weighted Assets)	10.00%	10.00%	'
Adequately Capitalized Requirement Total Capital (to Risk Weighted Assets) amount	$376,699	$387,132	'
Adequately Capitalized Requirement, Total Capital (to Risk Weighted Assets)	8.00%	8.00%	'
Actual, Total Capital (to Risk Weighted Assets)	'	'	12.00%

Shareholders_Equity_and_Minimu3

Shareholders' Equity and Minimum Regulatory Capital Requirements - Additional Information (Detail) (USD $)	0 Months Ended			3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 16, 2013	Sep. 05, 2013	Feb. 05, 2013	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012	Aug. 31, 2010
							Capital Bank, NA [Member]	Capital Bank, NA [Member]	Capital Bank, NA [Member]
									Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'	'	'	'	'	'	'	'
Total capital equal to risk - weighted assets	'	'	'	'	'	'	18.70%	18.80%	12.00%
Tier 1 capital equal to risk - weighted assets	'	'	'	'	'	'	17.40%	17.60%	11.00%
Minimum leverage ratio of (Tier 1 Capital ratio)	'	'	'	'	'	'	12.80%	12.00%	10.00%
Acquisition date of agreement	'	'	'	'	'	'	16-Jul-10	'	'
Prohibited period for payment of dividend	'	'	'	'	'	'	'3 years	'	'
Approved dividend	'	$105,000,000	'	'	'	'	'	'	'
Period of retained net profits	'	'	'	'	'	'2 years	'	'	'
Shares authorized to be repurchased	100,000,000	'	50,000,000	'	'	'	'	'	'
Common shares repurchased during the period, amount	'	'	'	$12,900,000	$50,000,000	$62,884,000	'	'	'
Common shares repurchased during the period, shares	'	'	'	600	2,839	'	'	'	'
Average price of common shares	'	'	'	$21.50	$17.60	'	'	'	'

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	OptionPlan		OptionPlan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'	'
Number of option exercise	'	'	16	'	'
Exercise price, lower limit range	'	'	$28.44	'	'
Exercise price, upper limit range	'	'	$2,026	'	'
Stock options granted	'	'	264,000	628,000	'
Tax benefit related to stock-based compensation expense	$0.50	$1.70	$1.70	$5.80	'
Stock option average service period	'	'	'2 years	'	'
Options exercised after ten years	0	'	0	'	'
Outstanding Options, weighted average remaining contractual life	'	'	'7 years	'	'
Aggregate intrinsic value for stock options outstanding	6.6	0	6.6	0	'
Aggregate intrinsic value for stock options exercisable	$5.60	$0	$5.60	$0	'
Options Exercisable, Number	2,879,000	1,432,000	2,879,000	1,432,000	'
Trading period for determining stock price	'	'	'	'	'30 days
Average simulated stock price over a period	'	'	'30 days	'	'
Restricted Stock and Restricted Stock Units [Member]	'	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'	'
Average of the simulated stock price over a period	'	'	'10 years	'	'
Restricted stock award from the mean or expected value	'	'	100,000	'	'
Vesting Term 1 [Member] | Restricted Stock and Restricted Stock Units [Member]	'	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'	'
Share based compensation arrangement by share based payment award options grants in period, percentage.	'	'	'	'	33.00%
Share based compensation arrangement by per share based payment award options grants in period.	'	'	'	'	25
Vesting Term 2 [Member] | Restricted Stock and Restricted Stock Units [Member]	'	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'	'
Share based compensation arrangement by share based payment award options grants in period, percentage.	'	'	'	'	33.00%
Share based compensation arrangement by per share based payment award options grants in period.	'	'	'	'	28
Vesting Term 3 [Member] | Restricted Stock and Restricted Stock Units [Member]	'	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'	'
Share based compensation arrangement by share based payment award options grants in period, percentage.	'	'	'	'	33.00%
Share based compensation arrangement by per share based payment award options grants in period.	'	'	'	'	32
2010 Plan [Member]	'	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'	'
Equity incentive plan effective date	'	'	22-Dec-09	'	'
Expiration of the plan	'	'	5,750	'	'
Exercise price under an incentive stock option granted	110.00%	'	110.00%	'	'
Exercise price for common stock	100.00%	'	100.00%	'	'
Fair market value at the date of grant	'	'	'5 years	'	'
Exercised after expiration	'	'	'10 years	'	'
2010 Plan [Member] | Restricted Stock and Restricted Stock Units [Member]	'	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'	'
Percentage of common stock shares to be optioned at expiration of plan	30.00%	'	30.00%	'	'
2010 Plan [Member] | Employee Stock Option [Member]	'	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'	'
Percentage of common stock shares to be optioned at expiration of plan	70.00%	'	70.00%	'	'
2013 Plan [Member]	'	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'	'
Equity incentive plan effective date	'	'	22-May-13	'	'
Expiration of the plan	'	'	2,639	'	'
Equity incentive plan maturity date	'	'	22-May-23	'	'
Stock options granted	0	'	0	'	'
Minimum [Member]	'	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'	'
Stock option average service period	'	'	'	'6 months	'
Minimum [Member] | 2010 Plan [Member]	'	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'	'
Exercise price under an incentive stock option granted	10.00%	'	10.00%	'	'

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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	$1,371	$4,242	$4,312	$14,927
Employee Stock Option [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	215	1,867	395	8,017
Restricted Stock Awards [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	1,156	2,375	3,917	6,910
Salaries and Employee Benefits [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	1,371	3,907	4,312	13,930
Other Expense [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	'	$335	'	$997

StockBased_Compensation_Summar1

Stock-Based Compensation - Summary of Stock Option Grants under 2010 Plan (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Number of options granted	264,000	628,000
Stock option grants, exercise price	$18	$20
Grant date fair value of shares	$6.52	$8.05
Employee Stock Option [Member] | 2010 Plan [Member] | May 21, 2013 - Employees [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Number of options granted	264,000	'
Stock option grants, exercise price	$18	'
Grant date fair value of shares	$6.52	'
Employee Stock Option [Member] | 2010 Plan [Member] | January 12, 2012 - Employees [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Number of options granted	628,000	'
Stock option grants, exercise price	$20	'
Grant date fair value of shares	$8.05	'

StockBased_Compensation_Summar2

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	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Grant date fair value of shares	$6.52	$8.05
Dividend yield	0.00%	0.00%
Risk-free interest rate	1.02%	0.91%
Expected option life	'5 years 9 months	'5 years 3 months
Volatility	37.00%	45.00%
Restricted Stock Awards [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Grant date fair value of shares	$18	$19.84
Risk-free interest rate	'Forward Treasury Curve	'Forward Treasury Curve
Market risk premium	'	0.00%
Volatility	'	45.00%
Annual forfeiture estimate	'	0.00%
Weighted average grant-date fair value of restricted stock awards granted	$18	$18.01

StockBased_Compensation_Summar3

Stock-Based Compensation - Summary of Stock Option Activity (Detail) (USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'
Balance, Shares	2,890	2,236
Stock options granted, Shares	264	628
Exercised, Shares	'	'
Expired or forfeited, Shares	21	'
Balance, Shares	3,133	2,864
Balance, Weighted Average Exercise Price Per Share	$21.39	$20
Granted, Weighted Average Exercise Price Per Share	$18	$20
Exercised, Weighted Average Exercise Price Per Share	'	'
Expired or forfeited, Weighted Average Exercise Price Per Share	$113.80	'
Balance, Weighted Average Exercise Price Per Share	$20.50	$20

StockBased_Compensation_Summar4

Stock-Based Compensation - Summary of Option Outstanding (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Exercise Price, Lower Range Limit	$28.44	'
Exercise Price, Upper Range Limit	$2,026	'
Outstanding Options, weighted average remaining contractual life	'7 years	'
Range One [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Exercise Price	$18	$20
Outstanding Options, Number	253	2,864
Outstanding Exercisable, Number	'	2,550
Outstanding Options, weighted average remaining contractual life	'9 years 7 months 21 days	'7 years 5 months 1 day
Outstanding options, Weighted Average Exercise Price Per Share	$18	$20
Exercisable Options, Weighted Average Exercise Price Per Share	'	$20
Range Two [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Exercise Price	$20	'
Exercise Price, Lower Range Limit	'	$28.44
Exercise Price, Upper Range Limit	'	$2,026
Outstanding Options, Number	2,864	26
Outstanding Exercisable, Number	2,864	25
Outstanding Options, weighted average remaining contractual life	'6 years 8 months 5 days	'3 years 7 months 24 days
Outstanding options, Weighted Average Exercise Price Per Share	$20	$174.50
Exercisable Options, Weighted Average Exercise Price Per Share	$20	$178.71
Range Three [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Exercise Price, Lower Range Limit	$28.44	$20
Exercise Price, Upper Range Limit	$2,026	$2,026
Outstanding Options, Number	16	2,890
Outstanding Exercisable, Number	15	2,575
Outstanding Options, weighted average remaining contractual life	'3 years 10 months 21 days	'7 years 4 months 21 days
Outstanding options, Weighted Average Exercise Price Per Share	$153.63	$21.39
Exercisable Options, Weighted Average Exercise Price Per Share	$159.68	$21.55
Range Four [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Exercise Price, Lower Range Limit	$20	'
Exercise Price, Upper Range Limit	$2,026	'
Outstanding Options, Number	3,133	'
Outstanding Exercisable, Number	2,879	'
Outstanding Options, weighted average remaining contractual life	'6 years 10 months 28 days	'
Outstanding options, Weighted Average Exercise Price Per Share	$20.50	'
Exercisable Options, Weighted Average Exercise Price Per Share	$20.71	'

StockBased_Compensation_Summar5

Stock-Based Compensation - Summary of Restricted Stock Award under 2010 Plan (Detail) (Restricted Stock Awards [Member], 2010 Plan [Member], USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013
May 21, 2013 - Employees [Member]	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Number of Restricted Stock Awards	4
Price Per Share	$18
January 12, 2012 - Employees [Member]	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Number of Restricted Stock Awards	307
Price Per Share	$19.84

StockBased_Compensation_Summar6

Stock-Based Compensation - Summary of Restricted Stock Awards (Detail) (USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'
Beginning balance, Shares	1,212	967
Granted, Shares	4	307
Vested, Shares	'	'
Expired or forfeited, Shares	'	'
Ending balance, Shares	1,216	1,274
Beginning balance, Value	$14.27	$13.26
Granted, Value	$18	$18.01
Vested, Value	'	'
Expired or forfeited, Value	'	'
Ending balance, Value	$14.28	$14.40

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, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]	'	'	'	'	'	'	'
Pretax income from continuing operations	$20,419	$17,649	$10,787	$8,627	$5,460	$46,736	$25,808
Income taxes computed at Federal statutory tax rate	7,147	'	'	'	1,911	16,358	9,033
Effect of:	'	'	'	'	'	'	'
State taxes (net of federal benefit)	784	'	'	'	214	1,795	1,012
State statutory rate change	1,545	'	'	'	'	1,545	'
Change in estimate of deductible loan losses	'	'	'	'	-33,975	'	-33,975
CVR adjustment	-301	'	'	'	'	1,156	'
Other, net	-200	'	'	'	-535	-756	-643
Total income tax expense	$8,975	$6,514	$5,234	$3,295	($32,385)	$20,098	($24,573)

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
Income Taxes [Line Items]	'	'	'
Deferred income tax asset, net	$177,928,000	$177,928,000	$183,157,000
Valuation allowance	0	0	0
Federal and state net operating loss carryforwards	94,100,000	94,100,000	98,200,000
Year of Expiration	'	'2029	'
Estimated Amount of Annual Limitation of Acquired Companies	10,900,000	10,900,000	'
Income tax expense recorded as a result of reduction in blended tax rate	1,600,000	'	'
Uncertain tax positions	$0	$0	$0
North Carolina [Member]	'	'	'
Income Taxes [Line Items]	'	'	'
Reduced North Carolina income tax rate after the enactment of law	6.00%	'	'
Reduced North Carolina income tax rate after the enactment of law	5.00%	'	'

Fair_Value_Assets_and_Liabilit

Fair Value - Assets and Liabilities Measured on a Recurring Basis (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'	'
Trading securities	$6,091	$0
Available for sale securities:	'	'
Available for sale securities	717,602	1,006,744
U.S. Government Agencies [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	8,015
Asset-Backed Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	137,961	'
States and Political Subdivisions-Tax Exempt [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	17,215
States and Political Subdivisions-Taxable [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	573
Industrial Revenue Bonds [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	3,965	3,800
Marketable Equity Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	946	2,719
Trust Preferred Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	246
Collateralized Debt Obligations [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	329	297
Fair Value on Recurring Basis [Member]	'	'
Assets	'	'
Trading securities	6,091	'
Available for sale securities:	'	'
Available for sale securities	717,602	1,006,744
Gross asset value of derivatives	'	880
Liabilities	'	'
Gross liability value of derivatives	1,103	1,024
Fair Value on Recurring Basis [Member] | U.S. Government Agencies [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	8,015
Fair Value on Recurring Basis [Member] | Asset-Backed Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	137,961	'
Fair Value on Recurring Basis [Member] | States and Political Subdivisions-Tax Exempt [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	17,215
Fair Value on Recurring Basis [Member] | States and Political Subdivisions-Taxable [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	573
Fair Value on Recurring Basis [Member] | Mortgage-Backed Securities-Residential [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	574,401	973,853
Fair Value on Recurring Basis [Member] | Industrial Revenue Bonds [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	3,965	3,800
Fair Value on Recurring Basis [Member] | Marketable Equity Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	946	2,719
Fair Value on Recurring Basis [Member] | Corporate Bonds [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	26
Fair Value on Recurring Basis [Member] | Trust Preferred Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	246
Fair Value on Recurring Basis [Member] | Collateralized Debt Obligations [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	329	297
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'
Assets	'	'
Trading securities	6,091	'
Available for sale securities:	'	'
Available for sale securities	946	2,965
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value on Recurring Basis [Member]	'	'
Assets	'	'
Trading securities	6,091	'
Available for sale securities:	'	'
Available for sale securities	946	2,965
Gross asset value of derivatives	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value on Recurring Basis [Member] | Marketable Equity Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	946	2,719
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value on Recurring Basis [Member] | Trust Preferred Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	246
Significant Other Observable Inputs (Level 2) [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	712,362	999,656
Gross asset value of derivatives	'	880
Liabilities	'	'
Gross liability value of derivatives	1,103	412
Significant Other Observable Inputs (Level 2) [Member] | Fair Value on Recurring Basis [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	712,362	999,656
Gross asset value of derivatives	'	880
Liabilities	'	'
Gross liability value of derivatives	1,103	1,024
Significant Other Observable Inputs (Level 2) [Member] | Fair Value on Recurring Basis [Member] | U.S. Government Agencies [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	8,015
Significant Other Observable Inputs (Level 2) [Member] | Fair Value on Recurring Basis [Member] | Asset-Backed Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	137,961	'
Significant Other Observable Inputs (Level 2) [Member] | Fair Value on Recurring Basis [Member] | States and Political Subdivisions-Tax Exempt [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	17,215
Significant Other Observable Inputs (Level 2) [Member] | Fair Value on Recurring Basis [Member] | States and Political Subdivisions-Taxable [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	573
Significant Other Observable Inputs (Level 2) [Member] | Fair Value on Recurring Basis [Member] | Mortgage-Backed Securities-Residential [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	574,401	973,853
Significant Unobservable Inputs (Level 3) [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	4,294	4,123
Significant Unobservable Inputs (Level 3) [Member] | Fair Value on Recurring Basis [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	4,294	4,123
Gross asset value of derivatives	'	'
Significant Unobservable Inputs (Level 3) [Member] | Fair Value on Recurring Basis [Member] | Industrial Revenue Bonds [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	3,965	3,800
Significant Unobservable Inputs (Level 3) [Member] | Fair Value on Recurring Basis [Member] | Corporate Bonds [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	'	26
Significant Unobservable Inputs (Level 3) [Member] | Fair Value on Recurring Basis [Member] | Collateralized Debt Obligations [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	$329	$297

Fair_Value_Additional_Informat

Fair Value - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended						9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011	Sep. 30, 2013	Dec. 31, 2012
									Carrying Value [Member]	Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'	'	'	'	'	'
Transfers of assets and liabilities between levels of the fair value	$0	$0	$0	$0	'	'	'	'	'	'
Other real estate owned	129,654	144,621	129,654	144,621	142,793	154,093	158,235	168,781	124,600	101,700
Other real estate valuation allowance	$6,045	$8,633	$18,844	$15,529	'	'	'	'	$24,600	$16,100

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) [Member], Fair Value on Recurring Basis [Member], USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Corporate Bonds [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Beginning balance	'	$752	$26	$790
Included in earnings-other than temporary impairment	'	'	'	-38
Included in earnings-gain on sale	'	'	199	'
Included in other comprehensive income	'	'	'	'
Sales	'	-726	-225	-726
Transfer in to Level 3	'	'	'	'
Ending balance	'	26	'	26
Industrial Revenue Bonds [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Beginning balance	3,872	3,750	3,800	3,750
Included in earnings-other than temporary impairment	'	'	'	'
Included in earnings-gain on sale	'	'	'	'
Included in other comprehensive income	93	'	165	'
Transfer in to Level 3	'	'	'	'
Ending balance	3,965	3,750	3,965	3,750
Collateralized Debt Obligations [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Beginning balance	301	247	297	328
Included in earnings-other than temporary impairment	'	'	'	'
Included in earnings-gain on sale	'	'	'	'
Included in other comprehensive income	28	41	32	42
Sales	'	'	'	-82
Transfer in to Level 3	'	'	'	'
Ending balance	$329	$288	$329	$288

Fair_Value_Quantitative_Inform

Fair Value - Quantitative Information about Fair Value Measurements (Detail) (Significant Unobservable Inputs (Level 3) [Member], USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Fair Value	$5,408,705	$6,061,905
OREO	4,691,571	5,043,976
Fair Value on Recurring Basis [Member] | Industrial Revenue Bonds [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Fair Value	3,965	3,800
Valuation Technique(s)	'Discounted cash flow	'Discounted cash flow
Fair Value on Recurring Basis [Member] | Collateralized Debt Obligations [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Fair Value	329	297
Valuation Technique(s)	'Discounted cash flow	'Discounted cash flow
Fair Value on Recurring Basis [Member] | Corporate Bonds [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Fair Value	'	26
Valuation Technique(s)	'	'Discounted cash flow
Fair Value on Nonrecurring Basis [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
OREO	$100,031	$85,645
Valuation Technique(s)	'Fair value of property	'Fair value of property
Discounted Cash Flow [Member] | Fair Value on Recurring Basis [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Illiquidity factor	0.50%	'
Discounted Cash Flow [Member] | Fair Value on Recurring Basis [Member] | Industrial Revenue Bonds [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Illiquidity factor	'	0.30%
Discounted Cash Flow [Member] | Fair Value on Recurring Basis [Member] | Collateralized Debt Obligations [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Discount Rate, Range	'Libor +10.75% and +13%	'Libor +10.75% and +13%
Discounted Cash Flow [Member] | Fair Value on Recurring Basis [Member] | Corporate Bonds [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Corporate bonds/Industrial revenue bond, Current yield/Discount rate	'	20.00%
Default Probability, Range	'	95.00%
Discounted Cash Flow [Member] | Minimum [Member] | Fair Value on Recurring Basis [Member] | Industrial Revenue Bonds [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Corporate bonds/Industrial revenue bond, Current yield/Discount rate	3.60%	1.60%
Discounted Cash Flow [Member] | Maximum [Member] | Fair Value on Recurring Basis [Member] | Industrial Revenue Bonds [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Corporate bonds/Industrial revenue bond, Current yield/Discount rate	3.70%	1.70%
Fair Value of Property [Member] | Minimum [Member] | Fair Value on Nonrecurring Basis [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Appraised value less costs to sell	7.00%	7.00%
Fair Value of Property [Member] | Maximum [Member] | Fair Value on Nonrecurring Basis [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Appraised value less costs to sell	10.00%	10.00%

Fair_Value_Quantitative_Inform1

Fair Value - Quantitative Information about Fair Value Measurements (Parenthetical) (Detail) (Significant Unobservable Inputs (Level 3) [Member])	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Significant Unobservable Inputs (Level 3) [Member]	'	'
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]	'	'
Fair value inputs basis spread on discount rate one	10.75%	10.75%
Fair value inputs basis spread on discount rate two	13.00%	13.00%

Fair_Value_Assets_and_Liabilit1

Fair Value - Assets and Liabilities Measured on a Nonrecurring Basis (Detail) (USD $)	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Other real estate owned	$129,654	$142,793	$154,093	$144,621	$158,235	$168,781
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value on Nonrecurring Basis [Member]	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Other real estate owned	'	'	'	'	'	'
Other repossessed assets	'	'	'	'	'	'
Significant Other Observable Inputs (Level 2) [Member] | Fair Value on Nonrecurring Basis [Member]	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Other repossessed assets	132	'	268	'	'	'
Significant Unobservable Inputs (Level 3) [Member] | Fair Value on Nonrecurring Basis [Member]	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Other real estate owned	$100,031	'	$85,645	'	'	'

Fair_Value_Carrying_Amount_and

Fair Value - Carrying Amount and Estimated Fair Values of Financial Instruments (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financial Assets	'	'
Trading securities	$6,091	$0
Investment securities available-for-sale	717,602	1,006,744
Investment securities held-to-maturity	483,413	0
Indemnification asset	36,837	49,417
Financial Liabilities	'	'
Federal Home Loan Bank advances	1,324	1,460
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'
Financial Assets	'	'
Cash and cash equivalents	163,704	734,874
Trading securities	6,091	'
Investment securities available-for-sale	946	2,965
Total financial assets	170,741	737,839
Significant Other Observable Inputs (Level 2) [Member]	'	'
Financial Assets	'	'
Investment securities available-for-sale	712,362	999,656
Investment securities held-to-maturity	483,413	'
Loans, net	8,918	11,276
Receivable from FDIC	8,439	8,486
Gross asset value of derivatives, Estimated Fair Value	'	880
Total financial assets	1,213,132	1,020,298
Financial Liabilities	'	'
Federal home loan bank advances, Estimated Fair Value	1,246	1,401
Short-term borrowings	23,224	41,507
Gross liability value of derivatives, Estimated Fair Value	1,103	412
Total financial liabilities	25,573	43,932
Significant Unobservable Inputs (Level 3) [Member]	'	'
Financial Assets	'	'
Investment securities available-for-sale	4,294	4,123
Loans, net	4,610,245	4,951,219
Indemnification asset	36,837	49,417
Federal Reserve, Federal Home Loan Bank and Independent Bankers' Bank Stock	40,195	39,217
Total financial assets	4,691,571	5,043,976
Financial Liabilities	'	'
Noncontractual deposits	3,688,697	3,802,170
Contractual deposits	1,572,723	2,075,954
Long-term borrowings	56,387	58,983
Subordinated debentures	90,898	124,798
Total financial liabilities	5,408,705	6,061,905
Carrying Value [Member]	'	'
Financial Assets	'	'
Cash and cash equivalents	163,704	734,874
Trading securities	6,091	'
Investment securities available-for-sale	717,602	1,006,744
Investment securities held-to-maturity	482,986	'
Loans, net	4,420,887	4,678,228
Receivable from FDIC	8,439	8,486
Indemnification asset	36,837	49,417
Federal Reserve, Federal Home Loan Bank and Independent Bankers' Bank Stock	40,195	39,217
Gross asset value of derivatives, Carrying Value	'	880
Total financial assets	5,876,741	6,517,846
Financial Liabilities	'	'
Noncontractual deposits	3,688,697	3,802,170
Contractual deposits	1,579,772	2,070,698
Federal Home Loan Bank advances	1,324	1,460
Short-term borrowings	23,224	41,508
Long-term borrowings	53,679	54,354
Subordinated debentures	84,611	126,076
Gross liability value of derivatives, Carrying Value	1,103	412
Total financial liabilities	5,432,410	6,096,678
Estimated Fair Value [Member]	'	'
Financial Assets	'	'
Cash and cash equivalents	163,704	734,874
Trading securities	6,091	'
Investment securities available-for-sale	717,602	1,006,744
Investment securities held-to-maturity	483,413	'
Loans, net	4,619,163	4,962,495
Receivable from FDIC	8,439	8,486
Indemnification asset	36,837	49,417
Federal Reserve, Federal Home Loan Bank and Independent Bankers' Bank Stock	40,195	39,217
Gross asset value of derivatives, Estimated Fair Value	'	880
Total financial assets	6,075,444	6,802,113
Financial Liabilities	'	'
Noncontractual deposits	3,688,697	3,802,170
Contractual deposits	1,572,723	2,075,342
Federal home loan bank advances, Estimated Fair Value	1,246	1,401
Short-term borrowings	23,224	41,507
Long-term borrowings	56,387	58,983
Subordinated debentures	90,898	124,798
Gross liability value of derivatives, Estimated Fair Value	1,103	412
Total financial liabilities	$5,434,278	$6,104,613

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail) (USD $)	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
In Millions, unless otherwise specified		Non Interest Income [Member]	Non Interest Income [Member]	Non Interest Expenses [Member]	Non Interest Expenses [Member]
Derivative [Line Items]	'	'	'	'	'
Non-interest expenses/income	'	($0.30)	($0.70)	$0.20	$0.40
Certificates of deposit	$10	'	'	'	'

Derivative_Instruments_Summary

Derivative Instruments - Summary of Derivative Instrument Contracts Fair Value and Notional Amount (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	'	$880
Derivative, Notional Amount	12,500	47,611
Assets [Member] | Interest Rate Swaps Associated with Certificates of Deposits (Maturing in 2040) [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	'	682
Derivative, Notional Amount	'	25,000
Assets [Member] | Interest Rate Cap Contracts (Maturing in 2014) [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	'	'
Derivative, Notional Amount	12,500	12,500
Assets [Member] | Interest Rate Swaps Associated with Loan Contracts (Maturing in 2014) [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	'	132
Derivative, Notional Amount	'	2,366
Assets [Member] | Currency Exchange Contracts (Maturing in 2013) [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	'	66
Derivative, Notional Amount	'	7,745
Assets [Member] | Forward Loan Sales Contracts (Maturing in 2013) [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	'	'
Derivative, Notional Amount	'	'
Liabilities [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	-1,103	-412
Derivative, Notional Amount	46,145	12,366
Liabilities [Member] | Interest Rate Swaps Associated with Certificates of Deposits (Maturing in 2040) [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	-845	'
Derivative, Notional Amount	25,000	'
Liabilities [Member] | Interest Rate Swaps Associated with Loan Contracts (Maturing in 2014) [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	'	-132
Derivative, Notional Amount	'	2,366
Liabilities [Member] | Currency Exchange Contracts (Maturing in 2013) [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	-116	-280
Derivative, Notional Amount	10,000	10,000
Liabilities [Member] | Forward Loan Sales Contracts (Maturing in 2013) [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Fair Value	-142	'
Derivative, Notional Amount	$11,145	'

Derivative_Instruments_Summary1

Derivative Instruments - Summary of Derivative Instrument Contracts Fair Value and Notional Amount (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2013
Interest Rate Swaps Associated with Certificates of Deposits (Maturing in 2040) [Member]	'
Derivative [Line Items]	'
Derivative maturity period	'27 years
Derivative maturity year	'2040
Interest Rate Cap Contracts (Maturing in 2014) [Member]	'
Derivative [Line Items]	'
Derivative maturity period	'1 year
Derivative maturity year	'2014
Interest Rate Swaps Associated with Loan Contracts (Maturing in 2014) [Member]	'
Derivative [Line Items]	'
Derivative maturity period	'1 year
Derivative maturity year	'2014
Currency Exchange Contracts (Maturing in 2013) [Member]	'
Derivative [Line Items]	'
Derivative maturity year	'2013
Forward Loan Sales Contracts (Maturing in 2013) [Member]	'
Derivative [Line Items]	'
Derivative maturity year	'2013
Maximum [Member] | Currency Exchange Contracts (Maturing in 2013) [Member]	'
Derivative [Line Items]	'
Derivative maturity period	'6 months
Maximum [Member] | Forward Loan Sales Contracts (Maturing in 2013) [Member]	'
Derivative [Line Items]	'
Derivative maturity period	'6 months