First Citizens BancShares (FCNCO) 10-Q 7 May 14 2014 Q1 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	3 Months Ended
	Mar. 31, 2014	7-May-14	7-May-14
		Class A Common Stock	Class B Common Stock
Entity Registrant Name	'FIRST CITIZENS BANCSHARES INC /DE/	'	'
Entity Central Index Key	'0000798941	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Document Type	'10-Q	'	'
Document Period End Date	31-Mar-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'Q1	'	'
Amendment Flag	'false	'	'
Entity Common Stock, Shares Outstanding	'	8,586,058	1,032,883

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'		'
Cash and due from banks	$543,471		$533,599
Overnight investments	1,161,469		859,324
Investment securities available for sale	5,676,237		5,387,703
Investment securities held to maturity	782		907
Loans held for sale	53,361		47,271
Loans and leases:	'		'
Acquired	1,270,818		1,029,426
Originated	12,200,226		12,104,298
Less allowance for loan and lease losses	-222,942		-233,394
Net loans and leases	13,248,102		12,900,330
Premises and equipment	878,850		876,522
Other real estate owned:	'		'
Covered under loss share agreements in other real estate owned	41,855	[1]	47,081
Not covered under loss share agreements in other real estate owned	44,504	[1],[2]	36,898
Income earned not collected	49,668		48,390
FDIC Indemnification Asset	74,784		93,397
Goodwill	127,140		102,625
Other intangible assets	4,390		1,247
Other assets	250,384		263,797
Total assets	22,154,997		21,199,091
Liabilities	'		'
Noninterest-bearing	5,627,868		5,241,817
Interest-bearing	13,135,677		12,632,249
Total deposits	18,763,545		17,874,066
Short-term borrowings	617,794		511,418
Long-term obligations	440,300		510,769
FDIC loss share payable	111,339		109,378
Other liabilities	117,189		116,785
Total liabilities	20,050,167		19,122,416
Shareholders' Equity	'		'
Surplus	143,766		143,766
Retained earnings	1,968,039		1,948,558
Accumulated other comprehensive loss	-16,594		-25,268
Total shareholders' equity	2,104,830		2,076,675
Total liabilities and shareholders' equity	22,154,997		21,199,091
Class A Common Stock	'		'
Shareholders' Equity	'		'
Common stock	8,586		8,586
Class B Common Stock	'		'
Shareholders' Equity	'		'
Common stock	$1,033		$1,033
[1]	Text selection found with no content.
[2]	Noncovered additions include $11.6 million from the 1st Financial merger.

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Class A Common Stock	'	'
Common stock, par value (in dollars per share)	$1	$1
Common stock, shared authorized	11,000,000	11,000,000
Common stock, shares issued	8,586,058	8,586,058
Common stock, shares outstanding	8,586,058	8,586,058
Class B Common Stock	'	'
Common stock, par value (in dollars per share)	$1	$1
Common stock, shared authorized	2,000,000	2,000,000
Common stock, shares issued	1,032,883	1,032,883
Common stock, shares outstanding	1,032,883	1,032,883

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Interest income	'	'
Loans and leases	$161,034	$211,763
Investment securities:	'	'
Total investment securities interest and dividend income	11,748	8,484
Overnight investments	612	357
Total interest income	173,394	220,604
Interest expense	'	'
Deposits	6,825	10,313
Short-term borrowings	585	704
Long-term obligations	5,053	4,705
Total interest expense	12,463	15,722
Net interest income	160,931	204,882
Provision for loan and lease losses	-1,903	-18,606
Net interest income after provision for loan and lease losses	162,834	223,488
Noninterest income	'	'
Cardholder and merchant services	11,832	11,071
Merchant Discount Fees	13,521	12,486
Service charges on deposit accounts	14,440	14,999
Wealth management services	14,880	14,515
Fees from processing services	4,861	5,619
Other service charges and fees	3,944	3,766
Mortgage income	955	3,788
Insurance commissions	3,287	2,980
ATM income	1,202	1,168
Adjustments for FDIC receivable for loss share agreements	-12,349	-24,053
Other	4,608	11,174
Total noninterest income	61,181	57,513
Noninterest expense	'	'
Salaries and wages	79,874	76,119
Employee benefits	20,100	25,019
Occupancy expense	20,425	18,809
Equipment expense	18,791	18,946
FDIC insurance expense	2,636	2,666
Foreclosure-related expenses	5,410	4,305
Other	43,794	48,491
Total noninterest expense	191,030	194,355
Income before income taxes	32,985	86,646
Income taxes	10,619	31,061
Net income	$22,366	$55,585
Average shares outstanding (in shares)	9,618,941	9,618,985
Net income per share	$2.33	$5.78

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]	'	'
Net income	$22,366	$55,585
Unrealized gains on securities:	'	'
Change in unrealized securities gains arising during period	11,899	-1,476
Tax effect	-4,643	565
Total change in unrealized gains on securities, net of tax	7,256	-911
Change in fair value of cash flow hedges:	'	'
Change in unrecognized loss on cash flow hedges	719	815
Tax effect	-278	-322
Total change in unrecognized loss on cash flow hedges, net of tax	441	493
Change in pension obligation:	'	'
Reclassification adjustment for losses included in income before income taxes	1,599	4,304
Tax effect	-622	-1,685
Total change in pension obligation, net of tax	977	2,619
Net current period other comprehensive income	8,674	2,201
Total comprehensive income	$31,040	$57,786

Consolidated_Statements_of_Cha

Consolidated Statements of Changes In Shareholders' Equity (USD $)	Total	Class A Common Stock	Common Stock	Common Stock	Surplus	Surplus	Retained Earnings	Retained Earnings	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss
In Thousands, unless otherwise specified			Class A Common Stock	Class B Common Stock		Class A Common Stock		Class A Common Stock		Class A Common Stock
Beginning balance at Dec. 31, 2012	$1,864,007	'	$8,588	$1,033	$143,766	'	$1,792,726	'	($82,106)	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'	'	'
Net income	55,585	'	0	0	0	'	55,585	'	0	'
Net current period other comprehensive income	2,201	'	0	0	0	'	0	'	2,201	'
Repurchase of common stock shares	'	-321	-2	'	'	0	'	-319	'	0
Cash dividends	-2,891	'	0	0	0	'	-2,891	'	0	'
Ending balance at Mar. 31, 2013	1,918,581	'	8,586	1,033	143,766	'	1,845,101	'	-79,905	'
Beginning balance at Dec. 31, 2013	2,076,675	'	8,586	1,033	143,766	'	1,948,558	'	-25,268	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'	'	'
Net income	22,366	'	0	0	0	'	22,366	'	0	'
Net current period other comprehensive income	8,674	'	0	0	0	'	0	'	8,674	'
Cash dividends	-2,885	'	0	0	0	'	-2,885	'	0	'
Ending balance at Mar. 31, 2014	$2,104,830	'	$8,586	$1,033	$143,766	'	$1,968,039	'	($16,594)	'

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Stockholders' Equity [Abstract]	'	'
Cash dividends (in dollars per share)	$0.30	$0.30
Class A Common Stock	'	'
Statement of Stockholders' Equity [Abstract]	'	'
Repurchase of common stock (in shares)	0	1,973
Class B Common Stock	'	'
Statement of Stockholders' Equity [Abstract]	'	'
Repurchase of common stock (in shares)	0	0

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
OPERATING ACTIVITIES	'	'
Net income	$22,366	$55,585
Adjustments to reconcile net income to cash provided by operating activities:	'	'
Provision for loan and lease losses	-1,903	-18,606
Deferred tax expense (benefit)	-4,512	7,733
Change in current taxes payable	40,710	31,625
Depreciation	17,684	17,994
Change in accrued interest payable	-1,062	-2,700
Change in income earned not collected	-1,278	411
Gain on sale of other assets	0	-4,085
Origination of loans held for sale	-67,862	-117,981
Proceeds from sale of loans held for sale	64,009	121,523
Gain on sale of loans	-1,054	-3,560
Loss on sale of other real estate	3,441	1,350
Net amortization of premiums and discounts	-5,796	-47,236
FDIC receivable for loss share agreements	4,359	5,619
Net change in other assets	-8,206	-7,038
Net change in other liabilities	2,186	32,662
Net cash provided by operating activities	63,082	73,296
INVESTING ACTIVITIES	'	'
Net change in loans outstanding	-4,788	269,428
Purchases of investment securities available for sale	-911,409	-736,923
Proceeds from maturities of investment securities held to maturity	125	113
Proceeds from maturities of investment securities available for sale	866,803	676,188
Net change in overnight investments	-302,145	-511,052
Cash received from the FDIC for loss share agreements	-3,490	42,519
Proceeds from sale of other real estate	10,602	36,019
Additions to premises and equipment	-17,326	-8,713
Business acquisition, net of cash acquired	18,194	0
Net cash (used) provided by investing activities	-343,434	-232,421
FINANCING ACTIVITIES	'	'
Net change in time deposits	-51,268	-195,381
Net change in demand and other interest-bearing deposits	308,876	174,277
Net change in short-term borrowings	35,970	4,597
Repayment of long-term obligations	-469	-669
Repurchase of common stock	0	-321
Cash dividends paid	-2,885	-2,891
Net cash provided (used) by financing activities	290,224	-20,388
Change in cash and due from banks	9,872	-179,513
Cash and due from banks at beginning of period	533,599	639,730
Cash and due from banks at end of period	543,471	460,217
CASH PAYMENTS FOR:	'	'
Interest	13,525	18,422
Income taxes	2,184	3,364
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:	'	'
Transfers of loans to other real estate	4,832	38,008
Dividends declared but not paid	$2,885	$0

Accounting_Policies_and_Basis_

Accounting Policies and Basis of Presentation	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Accounting Policies and Basis of Presentation	'
	Accounting Policies and Basis of Presentation
	First Citizens BancShares, Inc. (BancShares) is a financial holding company organized under the laws of Delaware and conducts operations through its banking subsidiary, First-Citizens Bank & Trust Company (FCB), which is headquartered in Raleigh, North Carolina.
	General
	These consolidated financial statements and notes are presented in accordance with instructions for Form 10-Q and Article 10 of Regulation S-X and, therefore, do not include all information and notes necessary for a complete presentation of financial position, results of operations and cash flow activity required in accordance with accounting principles generally accepted in the United States of America (GAAP). In the opinion of management, all normal recurring adjustments necessary for a fair presentation of the consolidated financial position and consolidated results of operations have been made. The unaudited interim consolidated financial statements included in this Form 10-Q should be read in conjunction with the consolidated financial statements and footnotes included in BancShares' Annual Report on Form 10-K for the year ended December 31, 2013.
	Reclassifications
	In certain instances, amounts reported in prior years' consolidated financial statements have been reclassified to conform to the current financial statement presentation. Such reclassifications had no effect on previously reported cash flows, shareholders' equity or net income.
	Use of Estimates in the Preparation of Financial Statements
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates, and different assumptions in the application of these policies could result in material changes in BancShares' consolidated financial position, the consolidated results of its operations or related disclosures. Material estimates that are particularly susceptible to significant change include the determination of the allowance for loan and lease losses; determination of the fair value of financial instruments; pension plan assumptions; cash flow estimates on acquired loans; the receivable from and payable to the FDIC for loss share agreements; purchase accounting-related adjustments; and income tax assets, liabilities and expense.
	Recent Accounting Pronouncements
	Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU ) 2014-04, “Receivables-Troubled Debt Restructurings by Creditors (Subtopic 310-40)”
	This ASU clarifies that an in-substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction.
	The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. We will adopt the guidance effective the first quarter of 2015, and we do not anticipate any effect on our consolidated financial position or consolidated results of operations as a result of adoption.
	FASB ASU 2013-11, “Income Taxes (Topic 740)”
	This ASU states that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows: to the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require BancShares to use, and BancShares does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The assessment of whether a deferred tax asset is available is based on the unrecognized tax benefit and deferred tax asset that exist at the reporting date and should be made presuming disallowance of the tax position at the reporting date.
	The provisions of this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. BancShares adopted the guidance effective first quarter of 2014. The initial adoption had no effect on our consolidated financial position or consolidated results of operations.
	FASB ASU 2013-04, “Liabilities”
	This ASU provides guidance for the recognition, measurement, and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of this ASU is fixed at the reporting date, except for obligations addressed within existing guidance in GAAP.
	The amendments in this update are effective for fiscal years beginning after December 31, 2013. BancShares adopted the guidance effective first quarter of 2014. The initial adoption did not have any effect on our consolidated financial position or consolidated results of operations.

Business_Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Business Combinations	'
	Business Combinations
	On January 1, 2014, FCB completed its merger with 1st Financial Services Corporation (1st Financial) of Hendersonville, NC and its wholly-owned subsidiary, Mountain 1st Bank & Trust Company (Mountain 1st). The merger allows FCB to expand its presence in Western North Carolina. Mountain 1st had twelve branches located in Asheville, Brevard, Columbus, Etowah, Fletcher, Forest City, Hendersonville, Hickory, Marion, Shelby and Waynesville. FCB requested and received approval from the North Carolina Commissioner of Banks and the FDIC to close seven Mountain 1st branches due to their proximity to legacy FCB branches. Customers have been notified, and the 90-day waiting period will expire on May 1. FCB anticipates closing the branches in Asheville, Brevard, Fletcher, Forest City, Hendersonville, Hickory and Marion sometime in May. All customer relationships assigned to those branches will be transferred to the nearest FCB branch.
	FCB paid $10.0 million to acquire 1st Financial, including payments of $8.0 million to the U.S. Treasury to acquire and subsequently retire1st Financial's Troubled Asset Relief Program (TARP) obligation and $2.0 million paid to the shareholders of 1st Financial. As a result of the merger, FCB recorded $24.5 million in goodwill and $3.8 million in core deposit intangibles.
	The 1st Financial transaction was accounted for under the acquisition method of accounting, and the purchased assets, assumed liabilities and identifiable intangible assets were recorded at their acquisition date estimated fair values. Fair values are subject to refinement for up to one year after the closing date of the transaction as additional information regarding closing date fair values becomes available.
	The following table provides the carrying value of acquired assets and assumed liabilities, as recorded by 1st Financial, the fair value adjustments calculated at the time of the merger and the resulting fair value recorded by FCB.
		January 1, 2014
	(Dollars in thousands)	As recorded by			Fair value adjustments			As recorded by FCB
		1st Financial
	Assets
	Cash and cash equivalents	$	28,194		$	—		$	28,194
	Investment securities	246,890			(9,452		)	237,438
	Loans held for sale	1,183			—			1,183
	Restricted equity securities	3,105			671			3,776
	Loans	338,170			(21,843		)	316,327
	Less: allowance for loan losses	(7,796		)	7,796			—
	Premises and equipment	3,871			(1,185		)	2,686
	Other real estate owned	12,896			(1,305		)	11,591
	Intangible asset	—			3,780			3,780
	Other assets	16,811			(465		)	16,346
	Total assets acquired	$	643,324		$	(22,003	)	$	621,321
	Liabilities
	Deposits:
	Noninterest-bearing	$	152,444		$	—		$	152,444
	Interest-bearing	477,881			1,546			479,427
	Total deposits	630,325			1,546			631,871
	Short-term borrowings	406			—			406
	Other liabilities	3,392			167			3,559
	Total liabilities assumed	$	634,123		$	1,713		635,836
	Fair value of net liabilities assumed							14,515
	Cash paid to shareholders							2,000
	Cash paid to acquire TARP securities							8,000
	Goodwill recorded for 1st Financial							$	24,515
	Goodwill recorded for 1st Financial represents future revenues to be derived from the existing customer base, including efficiencies that will result from combining operations and other non-identifiable intangible assets. The 1st Financial transaction is a taxable asset acquisition, and goodwill resulting from the transaction is deductible for income tax purposes.
	Merger costs related to the 1st Financial transaction are estimated to be between $6.0 million and $7.0 million. Revenue generated from 1st Financial was approximately $6.9 million for the first quarter of 2014.
	All loans resulting from the 1st Financial transaction are accounted for under the expected cash flow method (ASC 310-30).
	For loans acquired from 1st Financial, the contractually required payments including principal and interest, cash flows expected to be collected and fair values as of the merger date were:
	(Dollars in thousands)	January 1, 2014
	Contractually required payments	$	414,233
	Cash flows expected to be collected	400,622
	Fair value at acquisition date	316,327
	The recorded fair values of loans acquired in the 1st Financial transaction as of the merger date were as follows:
	(Dollars in thousands)	January 1, 2014
	Commercial:
	Construction and land development	$	41,516
	Commercial mortgage	123,925
	Other commercial real estate	6,698
	Commercial and industrial	29,126
	Total commercial loans	201,265
	Noncommercial:
	Residential mortgage	113,177
	Consumer	1,885
	Total noncommercial loans	115,062
	Total loans acquired from 1st Financial	$	316,327

Investments

Investments	3 Months Ended
	Mar. 31, 2014
Investments [Abstract]	'
Investments	'
	Investments
	The amortized cost and fair value of investment securities classified as available for sale and held to maturity at March 31, 2014 and December 31, 2013, are as follows:
		March 31, 2014
	(Dollars in thousands)	Cost		Gross		Gross unrealized		Fair
				unrealized		losses		value
				gains
	Investment securities available for sale
	U.S. Treasury	$	1,274,716	$	379	$	1,874	$	1,273,221
	Government agency	1,811,889		1,764		879		1,812,774
	Mortgage-backed securities	2,592,766		5,524		31,624		2,566,666
	Equity securities	543		22,017		—		22,560
	Municipal securities	186		—		—		186
	Other	870		—		40		830
	Total investment securities available for sale	$	5,680,970	$	29,684	$	34,417	$	5,676,237
		December 31, 2013
		Cost		Gross		Gross unrealized		Fair
				unrealized		losses		value
				gains
	U.S. Treasury	$	373,223	$	259	$	45	$	373,437
	Government agency	2,543,223		1,798		792		2,544,229
	Mortgage-backed securities	2,486,297		4,526		43,950		2,446,873
	Equity securities	543		21,604		—		22,147
	Municipal securities	186		1		—		187
	Other	863		—		33		830
	Total investment securities available for sale	$	5,404,335	$	28,188	$	44,820	$	5,387,703
		March 31, 2014
		Cost		Gross		Gross unrealized		Fair
				unrealized		losses		value
				gains
	Investment securities held to maturity
	Mortgage-backed securities	$	782	$	53	$	—	$	835
		December 31, 2013
		Cost		Gross		Gross unrealized		Fair
				unrealized		losses		value
				gains
	Mortgage-backed securities	$	907	$	67	$	—	$	974
	Investments in mortgage-backed securities primarily represent securities issued by the Government National Mortgage Association, Federal National Mortgage Association and Federal Home Loan Mortgage Corporation. Other investments include a subordinated debenture investment in another financial institution.
	The following table provides the amortized cost and fair value by contractual maturity. Expected maturities will differ from contractual maturities because borrowers and issuers may have the right to call or prepay obligations with or without prepayment penalties. Repayments of mortgage-backed securities are dependent on the repayments of the underlying loan balances. Equity securities do not have a stated maturity date.
		March 31, 2014				December 31, 2013
	(Dollars in thousands)	Cost		Fair		Cost		Fair
				value				value
	Investment securities available for sale
	Amortizing securities maturing in:
	One year or less	$	829,091	$	829,997	$	839,956	$	840,883
	One through five years	2,258,570		2,257,014		2,077,539		2,077,800
	Mortgage-backed securities	2,592,766		2,566,666		2,486,297		2,446,873
	Equity securities	543		22,560		543		22,147
	Total investment securities available for sale	$	5,680,970	$	5,676,237	$	5,404,335	$	5,387,703
	Investment securities held to maturity
	Mortgage-backed securities held to maturity	$	782	$	835	$	907	$	974
	There were no realized securities gains (losses) during any period presented.
	The following table provides information regarding securities with unrealized losses as of March 31, 2014 and December 31, 2013.
		March 31, 2014
		Less than 12 months				12 months or more				Total
	(Dollars in thousands)	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
		Value		Losses		Value		Losses		Value		Losses
	Investment securities available for sale:
	U.S. Treasury	$	699,985	$	1,874	$	—	$	—	$	699,985	$	1,874
	Government agency	400,423		879		—		—		400,423		879
	Mortgage-backed securities	2,012,814		30,816		23,622		808		2,036,436		31,624
	Other	830		40		—		—		830		40
	Total	$	3,114,052	$	33,609	$	23,622	$	808	$	3,137,674	$	34,417
		December 31, 2013
	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Investment securities available for sale:
U.S. Treasury	$	102,105	$	45	$	—	$	—	$	102,105	$	45
Government agency	780,552		761		29,969		31		810,521		792
Mortgage-backed securities	2,221,213		42,876		26,861		1,074		2,248,074		43,950
Other	830		33		—		—		830		33
Total	$	3,104,700	$	43,715	$	56,830	$	1,105	$	3,161,530	$	44,820
Investment securities with an aggregate fair value of $23.6 million and $56.8 million have had continuous unrealized losses for more than 12 months as of March 31, 2014 and December 31, 2013, with an aggregate unrealized loss of $0.8 million and $1.1 million, respectively. As of March 31, 2014, all 16 of these investments are mortgage-backed securities. None of the unrealized losses identified as of March 31, 2014 or December 31, 2013 relate to the marketability of the securities or the issuer’s ability to honor redemption obligations. For all periods presented, BancShares had the ability and intent to retain these securities for a period of time sufficient to recover all unrealized losses. Therefore, none of the securities were deemed to be other than temporarily impaired.
Investment securities having an aggregate carrying value of $2.78 billion at March 31, 2014 and $2.75 billion at December 31, 2013 were pledged as collateral to secure public funds on deposit and certain short-term borrowings, and for other purposes as required by law.

Loans_and_Leases

Loans and Leases	3 Months Ended
	Mar. 31, 2014
Loans and Leases Receivable Disclosure [Abstract]	'
Loans and Leases	'
	Loans and Leases
	Loans and leases outstanding, by class, include the following as of the dates indicated:
	(Dollars in thousands)	March 31, 2014			December 31, 2013
	Acquired loans
	Commercial:
	Construction and land development	$	106,670		$	78,915
	Commercial mortgage	728,872			642,891
	Other commercial real estate	47,826			41,381
	Commercial and industrial	38,838			17,254
	Other	870			866
	Total commercial loans	923,076			781,307
	Noncommercial:
	Residential mortgage	291,254			213,851
	Revolving mortgage	25,776			30,834
	Construction and land development	28,151			2,583
	Consumer	2,561			851
	Total noncommercial loans	347,742			248,119
	Total acquired loans	1,270,818			1,029,426
	Originated loans and leases:
	Commercial:
	Construction and land development	335,271			319,847
	Commercial mortgage	6,330,843			6,362,490
	Other commercial real estate	177,082			178,754
	Commercial and industrial	1,175,543			1,081,158
	Lease financing	394,268			381,763
	Other	179,725			175,336
	Total commercial loans	8,592,732			8,499,348
	Noncommercial:
	Residential mortgage	1,030,032			982,421
	Revolving mortgage	2,091,000			2,113,285
	Construction and land development	119,049			122,792
	Consumer	367,413			386,452
	Total noncommercial loans	3,607,494			3,604,950
	Total originated loans and leases	12,200,226			12,104,298
	Total loans and leases	$	13,471,044		$	13,133,724
	At March 31, 2014, $962.4 million in acquired loans were covered under loss share agreements, compared to $1.03 billion at December 31, 2013. The remaining acquired loans as of March 31, 2014 are from the 1st Financial merger.
	At March 31, 2014, $2.57 billion in originated loans were pledged to secure debt obligations, compared to $2.56 billion at December 31, 2013.
	Credit quality indicators
	Loans and leases are monitored for credit quality on a recurring basis. The credit quality indicators used are dependent on the portfolio segment to which the loan relates. Originated commercial loans and leases, originated noncommercial loans and leases and acquired loans have different credit quality indicators as a result of the unique characteristics relative to each loan segment being evaluated.
	The credit quality indicators for commercial loans and leases are developed through a review of individual borrowers on an ongoing basis. Each commercial loan is evaluated annually with more frequent evaluation of more severely criticized loans or leases. The credit quality indicators for noncommercial loans are based on the delinquency status of the borrower. As the borrower becomes more delinquent, the likelihood of loss increases. Acquired loans are bifurcated into commercial and noncommercial segments and credit quality indicators are assigned in the same manner as the originated portfolio. The indicators represent the rating for loans or leases as of the date presented based on the most recent assessment performed. These credit quality indicators are defined as follows:
	Pass – A pass rated asset is one in which repayment is considered highly likely and there are no observable weaknesses in the asset. Such an asset does not meet any of the characteristics for adverse classification.
	Special mention – A special mention asset has potential weaknesses that deserve management’s close attention. If left uncorrected, such potential weaknesses may result in deterioration of the repayment prospects or collateral position at some future date. Special mention assets are not adversely classified and do not warrant adverse classification.
	Substandard – A substandard asset is inadequately protected by the current net worth and paying capacity of the borrower or of the collateral pledged, if any. Assets classified as substandard generally have a well-defined weakness, or weaknesses, that jeopardize the liquidation of the debt. These assets are characterized by the distinct possibility of loss if the deficiencies are not corrected.
	Doubtful – An asset classified as doubtful has all the weaknesses inherent in an asset classified substandard with the added characteristic that the weaknesses make collection or liquidation in full highly questionable and improbable on the basis of currently existing facts, conditions and values.
	Loss – Assets classified as loss are considered uncollectible and of such little value that it is inappropriate to be carried as an asset. This classification is not necessarily equivalent to no potential for recovery or salvage value, but rather that it is not appropriate to defer a full charge-off even though partial recovery may be effected in the future.
	Ungraded – Ungraded loans represent loans that are not included in the individual credit grading process due to their relatively small balances or borrower type. The majority of originated, ungraded loans at March 31, 2014 and December 31, 2013 relate to business credit cards. Business credit card loans are subject to automatic charge-off when they become 120 days past due in the same manner as unsecured consumer lines of credit. The remaining balance is comprised of a small amount of commercial mortgage loans and other smaller balance consumer loans. Prior to March 31, 2014, ungraded loans also included tobacco buyout loans classified as commercial and industrial loans. Final payment from the Commodity Credit Corporation was received during January 2014 for tobacco buyout loans held by FCB. As of March 31, 2014, ungraded also includes $122.2 million of loans resulting from the 1st Financial merger.
	Originated loans and leases outstanding at March 31, 2014 and December 31, 2013 by credit quality indicator are provided below:
		March 31, 2014
	(Dollars in thousands)	Originated commercial loans and leases
	Grade:	Construction  and land			Commercial			Other		Commercial  and		Lease financing		Other		Total originated commercial loans and leases
		development			mortgage			commercial real estate		industrial
	Pass	$	323,876		$	6,064,405		$	173,517	$	1,074,210	$	386,324	$	179,640	$	8,201,972
	Special mention	8,442			117,436			1,302		16,777		4,233		10		148,200
	Substandard	2,953			143,723			2,119		6,051		3,155		70		158,071
	Doubtful	—			4,227			—		152		543		5		4,927
	Ungraded	—			1,052			144		78,353		13		—		79,562
	Total	$	335,271		$	6,330,843		$	177,082	$	1,175,543	$	394,268	$	179,725	$	8,592,732
		December 31, 2013
		Originated commercial loans and leases
		Construction  and land			Commercial			Other		Commercial  and		Lease financing		Other		Total originated commercial loans and leases
		development			mortgage			commercial real estate		industrial
	Pass	$	308,231		$	6,094,505		$	174,913	$	964,840	$	375,371	$	174,314	$	8,092,174
	Special mention	8,620			119,515			1,362		14,686		2,160		982		147,325
Substandard	2,944			141,913			2,216		6,352		3,491		40		156,956
Doubtful	52			5,159			75		144		592		—		6,022
Ungraded	—			1,398			188		95,136		149		—		96,871
Total	$	319,847		$	6,362,490		$	178,754	$	1,081,158	$	381,763	$	175,336	$	8,499,348
	March 31, 2014
	Originated noncommercial loans and leases
(Dollars in thousands)	Residential			Revolving			Construction		Consumer		Total originated noncommercial
	mortgage			mortgage			and land				loans
							development
Current	$	1,003,016		$	2,072,832		$	117,161	$	363,259	$	3,556,268
30-59 days past due	16,845			10,578			888		2,156		30,467
60-89 days past due	1,063			3,249			794		1,195		6,301
90 days or greater past due	9,108			4,341			206		803		14,458
Total	$	1,030,032		$	2,091,000		$	119,049	$	367,413	$	3,607,494
	December 31, 2013
	Originated noncommercial loans and leases
	Residential			Revolving			Construction		Consumer		Total originated noncommercial
	mortgage			mortgage			and land				loans
							development
Current	$	955,300		$	2,095,480		$	121,026	$	382,710	$	3,554,516
30-59 days past due	12,885			10,977			1,193		2,114		27,169
60-89 days past due	4,658			2,378			317		955		8,308
90 days or greater past due	9,578			4,450			256		673		14,957
Total	$	982,421		$	2,113,285		$	122,792	$	386,452	$	3,604,950
Acquired loans and leases outstanding at March 31, 2014 and December 31, 2013 by credit quality indicator are provided below:
	March 31, 2014
(Dollars in thousands)	Acquired loans
Grade:	Construction			Commercial			Other		Commercial		Residential		Revolving		Construction		Consumer		Total acquired
	and land			mortgage			commercial		and		mortgage		mortgage		and land		and other		loans
	development -						real estate		industrial						development -
	commercial														noncommercial
Pass	$	14,789		$	375,245		$	28,526	$	29,918	$	131,765	$	20,240	$	32	$	1,387	$	601,902
Special mention	24,065			134,414			114		3,260		4,823		2,649		—		—		169,325
Substandard	58,374			182,540			10,473		4,686		46,044		1,891		1,716		—		305,724
Doubtful	5,101			36,040			8,713		954		1,931		911		295		—		53,945
Ungraded	4,341			633			—		20		106,691		85		26,108		2,044		139,922
Total	$	106,670		$	728,872		$	47,826	$	38,838	$	291,254	$	25,776	$	28,151	$	3,431	$	1,270,818
	December 31, 2013
	Acquired loans
	Construction			Commercial			Other		Commercial		Residential		Revolving		Construction		Consumer		Total acquired
	and land			mortgage			commercial		and		mortgage		mortgage		and land		and other		loans
	development -						real estate		industrial						development -
	commercial														noncommercial
Pass	$	2,619		$	296,824		$	22,225	$	8,021	$	135,326	$	26,322	$	149	$	1,345	$	492,831
Special mention	15,530			125,295			3,431		2,585		6,301		2,608		—		—		155,750
Substandard	52,228			179,657			7,012		5,225		52,774		1,013		2,139		—		300,048
Doubtful	7,436			40,471			8,713		1,257		2,058		891		295		—		61,121
Ungraded	1,102			644			—		166		17,392		—		—		372		19,676
Total	$	78,915		$	642,891		$	41,381	$	17,254	$	213,851	$	30,834	$	2,583	$	1,717	$	1,029,426
The aging of the outstanding loans and leases, by class, at March 31, 2014 and December 31, 2013 (excluding loans and leases acquired with deteriorated credit quality) is provided in the table below.
The calculation of days past due begins on the day after payment is due and includes all days through which all required interest or principal has not been paid. Loans and leases 30 days or less past due are considered current as various grace periods allow borrowers to make payments within a stated period after the due date and still remain in compliance with the loan agreement.
	March 31, 2014
(Dollars in thousands)	30-59 days			60-89 days			90 days or greater		Total past		Current		Total loans
	past due			past due					due				and leases
Originated loans and leases:
Construction and land development - commercial	$	537		$	184		$	655	$	1,376	$	333,895	$	335,271
Commercial mortgage	24,451			3,934			11,248		39,633		6,291,210		6,330,843
Other commercial real estate	155			11			104		270		176,812		177,082
Commercial and industrial	3,921			488			509		4,918		1,170,625		1,175,543
Lease financing	757			323			92		1,172		393,096		394,268
Other	20			5			—		25		179,700		179,725
Residential mortgage	16,845			1,063			9,108		27,016		1,003,016		1,030,032
Revolving mortgage	10,578			3,249			4,341		18,168		2,072,832		2,091,000
Construction and land development - noncommercial	888			794			206		1,888		117,161		119,049
Consumer	2,156			1,195			803		4,154		363,259		367,413
Total originated loans and leases	$	60,308		$	11,246		$	27,066	$	98,620	$	12,101,606	$	12,200,226
	December 31, 2013
	30-59 days			60-89 days			90 days or greater		Total past		Current		Total loans
	past due			past due					due				and leases
Originated loans and leases:
Construction and land development - commercial	$	1,603		$	9		$	457	$	2,069	$	317,778	$	319,847
Commercial mortgage	11,131			3,601			14,407		29,139		6,333,351		6,362,490
Other commercial real estate	139			210			470		819		177,935		178,754
Commercial and industrial	3,336			682			436		4,454		1,076,704		1,081,158
Lease financing	789			1,341			101		2,231		379,532		381,763
Other	—			85			—		85		175,251		175,336
Residential mortgage	12,885			4,658			9,578		27,121		955,300		982,421
Revolving mortgage	10,977			2,378			4,450		17,805		2,095,480		2,113,285
Construction and land development - noncommercial	1,193			317			256		1,766		121,026		122,792
Consumer	2,114			955			673		3,742		382,710		386,452
Total originated loans and leases	$	44,167		$	14,236		$	30,828	$	89,231	$	12,015,067	$	12,104,298
The recorded investment, by class, in loans and leases on nonaccrual status, and loans and leases greater than 90 days past due and still accruing at March 31, 2014 and December 31, 2013 (excluding acquired loans and leases) are as follows:
	March 31, 2014						December 31, 2013
(Dollars in thousands)	Nonaccrual			Loans and			Nonaccrual		Loans and
	loans and			leases > 90			loans and		leases > 90
	leases			days and			leases		days and
				accruing					accruing
Originated loans and leases:
Construction and land development - commercial	$	702		$	192		$	544	$	—
Other commercial real estate	1,459			—			1,610		—
Commercial mortgage	28,910			927			33,529		1,113
Commercial and industrial	1,075			393			1,428		294
Lease financing	689			—			832		—
Residential mortgage	14,091			2,609			14,701		1,998
Revolving mortgage	—			4,341			—		4,450
Construction and land development - noncommercial	—			206			457		256
Consumer	26			803			69		673
Total originated loans and leases	$	46,952		$	9,471		$	53,170	$	8,784
Acquired Loans
The following table provides changes in the recorded investment of acquired loans during the three months ended March 31, 2014 and March 31, 2013:
(Dollars in thousands)	2014			2013
Balance at January 1	$	1,029,426		$	2,362,152
Fair value of acquired loans	316,327			—
Accretion	30,200			79,886
Payments received and other changes, net	(105,135		)	(258,169		)
Balance at March 31	$	1,270,818		$	2,183,869
Outstanding principal balance at March 31	$	1,727,492		$	3,618,722
The recorded investment of loans on the cost recovery method was $52.1 million at March 31, 2014 and $28.5 million at December 31, 2013. This increase is primarily driven by one large acquired loan relationship that was moved to cost recovery during the quarter. The cost recovery method is applied to loans when the timing of future cash flows is not reasonably estimable due to borrower nonperformance or uncertainty in the timing and amount of ultimate disposition of the asset.
The following table documents changes to the amount of accretable yield for the first three months of 2014 and 2013.
(Dollars in thousands)	2014			2013
Balance at January 1	$	439,990		$	539,564
Additions	84,295			—
Accretion	(30,200		)	(79,886		)
Reclassifications from (to) nonaccretable difference	6,048			(11,653		)
Changes in expected cash flows that do not affect nonaccretable difference	(9,888		)	37,910
Balance at March 31	$	490,245		$	485,935

Allowance_for_Loan_and_Lease_L

Allowance for Loan and Lease Losses	3 Months Ended
	Mar. 31, 2014
Allowance for Loan and Lease Losses, Adjustments, Net [Abstract]	'
Allowance for Loan and Lease Losses	'
	Allowance for Loan and Lease Losses
	The following tables present the activity in the allowance for originated loan and lease losses by class of loans for the three months ended March 31, 2014 and March 31, 2013:
		Three months ended March 31, 2014
	(Dollars in thousands)	Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Non-			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land						specific
		development							real estate																				development
		- commercial																											- non-
																													commercial
	Originated Loans
	Allowance for loan and lease losses:
	Balance at January 1	$	10,335		$	100,257			$	1,009			$	22,362			$	4,749		$	190		$	10,511		$	16,239		$	681		$	13,541		$	—		$	179,874
	Provision	1,885			(6,979		)		(74		)		1,976				(524		)	272			609			1,353			577			1,275			—			370
	Charge-offs	—			(168		)		—				(496		)		(58		)	(8		)	(184		)	(1,260		)	(71		)	(2,177		)	—			(4,422		)
	Recoveries	26			1,107				10				179				16			—			8			76			62			643			—			2,127
	Balance at March 31	$	12,246		$	94,217			$	945			$	24,021			$	4,183		$	454		$	10,944		$	16,408		$	1,249		$	13,282		$	—		$	177,949
		Three months ended March 31, 2013
		Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Non-			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land						specific
		development							real estate																				development
		- commercial																											- non-
																													commercial
	Balance at January 1	$	6,031		$	70,927			$	2,059			$	23,352			$	3,521		$	1,175		$	3,836		$	25,185		$	1,721		$	25,389		$	15,850		$	179,046
	Provision	(1,834		)	2,536				(100		)		500				22			315			733			1,431			(113		)	604			(78		)	4,016
	Charge-offs	(254		)	(654		)		(54		)		(1,258		)		—			—			(818		)	(2,188		)	(245		)	(2,596		)	—			(8,067		)
	Recoveries	368			8				10				369				—			—			39			71			56			630			—			1,551
	Balance at March 31	$	4,311		$	72,817			$	1,915			$	22,963			$	3,543		$	1,490		$	3,790		$	24,499		$	1,419		$	24,027		$	15,772		$	176,546
	The provision for construction and land development - commercial totaled $1.9 million for the three months ended March 31, 2014. The March 31, 2014 provision expense was a direct result of increased loans during the quarter. Conversely, the March 31, 2013 credit provision resulted from a decline in the outstanding loan balances as well as the resolution of several individually impaired loans.
	The commercial mortgage loan class had a net credit provision of $7.0 million for the three months ended March 31, 2014. The net credit provision was the result of declining loan balances, improvements in the credit risk rating mix and lower credit default trends within this loan class. Conversely, the March 31, 2013 provision expense was impacted by increased loan balances.
	The commercial and industrial loan class had a provision expense of $2.0 million for the three months ended March 31, 2014 reflecting $94.4 million in loan growth for the quarter.
	The following tables present the allowance for originated loan losses and the recorded investment in originated loans, by loan class, based on impairment method as of March 31, 2014 and December 31, 2013:
		March 31, 2014
	(Dollars in thousands)	Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land
		development							real estate																				development
		- commercial																											- non-commercial
	Allowance for loan and lease losses:
	ALLL for loans and leases individually evaluated for impairment	$	144		$	6,400			$	203			$	769			$	13		$	—		$	1,418		$	353		$	77		$	118		$	9,495
	ALLL for loans and leases collectively evaluated for impairment	12,102			87,817				742				23,252				4,170			454			9,526			16,055			1,172			13,164			168,454
	Total allowance for loan and lease losses	$	12,246		$	94,217			$	945			$	24,021			$	4,183		$	454		$	10,944		$	16,408		$	1,249		$	13,282		$	177,949
	Loans and leases:
	Loans and leases individually evaluated for impairment	$	2,329		$	88,987			$	1,627			$	8,804			$	393		$	—		$	15,626		$	3,587		$	699		$	1,015		$	123,067
	Loans and leases collectively evaluated for impairment	332,942			6,241,856				175,455				1,166,739				393,875			179,725			1,014,406			2,087,413			118,350			366,398			12,077,159
	Total loan and leases	$	335,271		$	6,330,843			$	177,082			$	1,175,543			$	394,268		$	179,725		$	1,030,032		$	2,091,000		$	119,049		$	367,413		$	12,200,226
		December 31, 2013
		Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land
		development							real estate																				development
		- commercial																											- non-commercial
	ALLL for loans and leases individually evaluated for impairment	$	103		$	6,873			$	209			$	771			$	54		$	—		$	1,586		$	372		$	72		$	121		$	10,161
	ALLL for loans and leases collectively evaluated for impairment	10,232			93,384				800				21,591				4,695			190			8,925			15,867			609			13,420			169,713
	Total allowance for loan and lease losses	$	10,335		$	100,257			$	1,009			$	22,362			$	4,749		$	190		$	10,511		$	16,239		$	681		$	13,541		$	179,874
	Loans and leases individually evaluated for impairment	$	2,272		$	97,111			$	1,878			$	9,300			$	188		$	—		$	15,539		$	3,596		$	1,108		$	1,154		$	132,146
	Loans and leases collectively evaluated for impairment	317,575			6,265,379				176,876				1,071,858				381,575			175,336			966,882			2,109,689			121,684			385,298			11,972,152
	Total loan and leases	$	319,847		$	6,362,490			$	178,754			$	1,081,158			$	381,763		$	175,336		$	982,421		$	2,113,285		$	122,792		$	386,452		$	12,104,298
	The following tables show the activity in the allowance for acquired loan and lease losses for the three months ended March 31, 2014 and March 31, 2013.
		Three months ended March 31, 2014
	(Dollars in thousands)	Construction			Commercial				Other				Commercial				Residential			Revolving			Construction			Consumer			Total
		and land			mortgage				commercial				and				mortgage			mortgage			and land			and other
		development -							real estate				industrial										development -
		commercial																					noncommercial
	Acquired Loans
	Allowance for loan and lease losses:
	Balance at January 1	$	1,320		$	29,906			$	1,354			$	5,275			$	11,802		$	2,959		$	682		$	222		$	53,520
Provision	3,355			(3,386		)		(150		)		(336		)		(2,300		)	634			(99		)	9			(2,273		)
Charge-offs	(199		)	(3,517		)		—				(2,683		)		262			(100		)	—			(17		)	(6,254		)
Recoveries	—			—				—				—				—			—			—			—			—
Balance at March 31	$	4,476		$	23,003			$	1,204			$	2,256			$	9,764		$	3,493		$	583		$	214		$	44,993
	Three months ended March 31, 2013
	Construction			Commercial				Other				Commercial				Residential			Revolving			Construction			Consumer			Total
	and land			mortgage				commercial				and				mortgage			mortgage			and land			and other
	development -							real estate				industrial										development -
	commercial																					noncommercial
Balance at January 1	$	31,186		$	50,275			$	11,234			$	8,897			$	19,837		$	9,754		$	8,287		$	502		$	139,972
Provision	(13,147		)	(2,084		)		(5,131		)		4,233				(1,505		)	(2,505		)	(2,313		)	(170		)	(22,622		)
Charge-offs	(4,733		)	(9,898		)		(931		)		(1,254		)		(729		)	(114		)	(3,218		)	—			(20,877		)
Recoveries	—			—				—				—				—			—			—			—			—
Balance at March 31	$	13,306		$	38,293			$	5,172			$	11,876			$	17,603		$	7,135		$	2,756		$	332		$	96,473
The following tables show the ending balances of acquired loans and leases and related allowance by class of loans as of March 31, 2014 and December 31, 2013:
	March 31, 2014
	Construction			Commercial				Other				Commercial				Residential			Revolving			Construction			Consumer			Total
	and land			mortgage				commercial				and				mortgage			mortgage			and land			and other
	development -							real estate				industrial										development -
	commercial																					noncommercial
ALLL for loans and leases acquired with deteriorated credit quality	$	4,476		$	23,003			$	1,204			$	2,256			$	9,764		$	3,493		$	583		$	214		$	44,993
Loans and leases acquired with deteriorated credit quality	106,670			728,872				47,826				38,838				291,254			25,776			28,151			3,431			1,270,818
	December 31, 2013
	Construction			Commercial				Other				Commercial				Residential			Revolving			Construction			Consumer			Total
	and land			mortgage				commercial				and				mortgage			mortgage			and land			and other
	development -							real estate				industrial										development -
	commercial																					noncommercial
ALLL for loans and leases acquired with deteriorated credit quality	$	1,320		$	29,906			$	1,354			$	5,275			$	11,802		$	2,959		$	682		$	222		$	53,520
Loans and leases acquired with deteriorated credit quality	78,915			642,891				41,381				17,254				213,851			30,834			2,583			1,717			1,029,426
At March 31, 2014 and December 31, 2013, $382.6 million and $459.9 million, respectively, in acquired loans experienced an adverse change in expected cash flows since the date of acquisition.
The following tables provide information on originated loans and leases that are individually evaluated for impairment as of March 31, 2014 and December 31, 2013.
	March 31, 2014
(Dollars in thousands)	With a			With no				Total				Unpaid				Related
	recorded			recorded								principal				allowance
	allowance			allowance								balance				recorded
Impaired originated loans and leases
Construction and land development - commercial	$	1,646		$	683			$	2,329			$	3,294			$	144
Commercial mortgage	57,568			31,419				88,987				94,950				6,400
Other commercial real estate	755			872				1,627				2,027				203
Commercial and industrial	6,530			2,274				8,804				10,055				769
Lease financing	238			155				393				393				13
Residential mortgage	10,624			5,002				15,626				16,026				1,418
Revolving mortgage	3,210			377				3,587				4,618				353
Construction and land development - noncommercial	699			—				699				699				77
Consumer	1,015			—				1,015				1,039				118
Total impaired originated loans and leases	$	82,285		$	40,782			$	123,067			$	133,101			$	9,495
	December 31, 2013
	With a			With no				Total				Unpaid				Related
	recorded			recorded								principal				allowance
	allowance			allowance								balance				recorded
Impaired originated loans and leases
Construction and land development - commercial	$	1,025		$	1,247			$	2,272			$	7,306			$	103
Commercial mortgage	57,819			39,292				97,111				103,522				6,873
Other commercial real estate	783			1,095				1,878				2,279				209
Commercial and industrial	7,197			2,103				9,300				10,393				771
Lease financing	133			55				188				188				54
Residential mortgage	11,534			4,005				15,539				15,939				1,586
Revolving mortgage	3,382			214				3,596				3,596				372
Construction and land development - noncommercial	651			457				1,108				1,108				72
Consumer	1,154			—				1,154				1,154				121
Total impaired originated loans and leases	$	83,678		$	48,468			$	132,146			$	145,485			$	10,161
The following tables show the average impaired originated loan balance and the interest income recognized by loan class for the three months ended March 31, 2014 and March 31, 2013:
	Three months ended March 31, 2014
(Dollars in thousands)	Average			Interest income recognized
	balance
Impaired originated loans and leases:
Construction and land development - commercial	$	1,031		$	15
Commercial mortgage	94,547			1,120
Other commercial real estate	1,796			21
Commercial and industrial	10,234			118
Lease financing	284			4
Residential mortgage	16,482			174
Revolving mortgage	3,892			27
Construction and land development - noncommercial	2,322			29
Consumer	1,059			5
Total impaired originated loans and leases	$	131,647		$	1,513
	Three months ended March 31, 2013
	Average			Interest income recognized
	balance
Impaired originated loans and leases:
Construction and land development - commercial	$	9,284		$	112
Commercial mortgage	103,848			1,425
Other commercial real estate	3,179			45
Commercial and industrial	18,997			266
Lease financing	355			6
Residential mortgage	17,330			228
Revolving mortgage	5,472			25
Construction and land development - noncommercial	866			11
Consumer	1,683			5
Total impaired originated loans and leases	$	161,014		$	2,123
Troubled Debt Restructurings
BancShares accounts for certain loan modifications or restructurings as troubled debt restructurings (TDRs). In general, the modification or restructuring of a loan is considered a TDR if, for economic reasons or legal reasons related to a borrower's financial difficulties, a concession is granted to the borrower that creditors would not otherwise grant. Concessions may relate to the contractual interest rate, maturity date, payment structure or other actions. In accordance with GAAP, loans acquired under ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality, are not initially considered to be TDRs, but can be classified as such if a modification is made subsequent to acquisition. Modifications of acquired loans that are part of a pool are not designated as TDRs. The following table provides a summary of total TDRs by accrual status.
	March 31, 2014											December 31, 2013
(Dollars in thousands)	Accruing			Nonaccruing				Total				Accruing				Nonaccruing			Total
Commercial loans
Construction and land development - commercial	$	20,791		$	1,002			$	21,793			$	21,032			$	1,002		$	22,034
Commercial mortgage	136,563			25,276				161,839				113,323				23,387			136,710
Other commercial real estate	3,308			933				4,241				3,470				1,150			4,620
Commercial and industrial	8,929			1,180				10,109				9,838				1,142			10,980
Lease	247			146				393				49				—			49
Total commercial TDRs	169,838			28,537				198,375				147,712				26,681			174,393
Noncommercial
Residential	23,519			3,806				27,325				23,343				3,663			27,006
Revolving mortgage	3,587			—				3,587				3,095				—			3,095
Construction and land development - noncommercial	699			—				699				651				457			1,108
Consumer and other	1,015			—				1,015				1,154				—			1,154
Total noncommercial TDRs	28,820			3,806				32,626				28,243				4,120			32,363
Total TDRs	$	198,658		$	32,343			$	231,001			$	175,955			$	30,801		$	206,756
The following table shows the accrual status of acquired and originated TDRs.
(Dollars in thousands)	March 31, 2014			December 31, 2013
Accruing TDRs:
Acquired	$	105,642		$	90,829
Originated	93,016			85,126
Total accruing TDRs	198,658			175,955
Nonaccruing TDRs:
Acquired	11,626			11,479
Originated	20,717			19,322
Total nonaccruing TDRs	32,343			30,801
All TDRs:
Acquired	117,268			102,308
Originated	113,733			104,448
Total TDRs	$	231,001		$	206,756
All TDRs are impaired loans. TDRs are, therefore, individually evaluated for impairment on a quarterly basis or more frequently as needed. Impairment is evaluated using one of three approved valuation methodologies: discounted cash flows, market prices or collateral values. Based on the accrual status and credit grade, management determines the most appropriate method to reasonably assess expectations for recovery of the investment. The discounted cash flow method, the collateral value method or a combination of the two aforementioned methods is used internally for TDR impairment analysis. Expected cash flows are discounted at the loan’s original effective interest rate.
Specific valuation allowances are established or partial charge-offs are recorded on TDRs in the amount equal to the difference between the estimated fair value and the loan amount.
The majority of TDRs are included in the special mention, substandard or doubtful grading categories. When a restructured loan subsequently defaults, it is evaluated and downgraded if appropriate. The more severely graded the loan, the lower the estimated expected cash flows and the greater the allowance recorded.
The following tables provide the types of TDRs made during the three months ended March 31, 2014 and March 31, 2013 for originated loans, as well as a summary of originated loans that were modified as a TDR during the 12 months ended March 31, 2014 and March 31, 2013 that subsequently defaulted during the three months ended March 31, 2014 and March 31, 2013. BancShares defines payment default as movement of the TDR to nonaccrual status, which is generally 30 days past due for TDRs, foreclosure or charge-off, whichever occurs first.
.
	Three months ended March 31, 2014									Three months ended March 31, 2013
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
(Dollars in thousands)	Number of Loans	Recorded investment at period end			Number of Loans	Recorded investment at period end				Number of Loans	Recorded investment at period end				Number of Loans	Recorded investment at period end
Originated loans
Interest only period provided
Commercial mortgage	4	$	1,911		2	$	410			1	$	356			—	$	—
Commercial and industrial	1	196			—	—				—	—				—	—
Lease financing	2	146			—	—				—	—				—	—
Total interest only	7	2,253			2	410				1	356				—	—
Loan term extension
Commercial mortgage	5	2,620			—	—				6	2,117				1	483
Commercial and industrial	—	—			—	—				1	186				—	—
Lease financing	2	234			—	—				—	—				—	—
Residential mortgage	5	338			—	—				4	683				—	—
Consumer	—	—			1	41				—	—				—	—
Total loan term extension	12	3,192			1	41				11	2,986				1	483
Below market interest rate
Construction and land development - commercial	1	82			—	—				—	—				—	—
Commercial mortgage	12	4,677			1	449				3	2,556				1	1,024
Commercial and industrial	2	110			—	—				1	17				1	116
Residential mortgage	8	451			3	127				5	675				—	—
Revolving mortgage	5	278			—	—				—	—				—	—
Consumer	—	—			—	—				5	1,490				—	—
Total below market interest rate	28	5,598			4	576				14	4,738				2	1,140
Discharged from bankruptcy
Commercial mortgage	1	1,003			—	—				—	—				—	—
Residential mortgage	7	708			2	288				2	299				—	—
Revolving mortgage	4	229			—	—				24	1,878				5	233
Construction and land development-noncommercial	1	62			—	—				—	—				—	—
Consumer	1	18			—	—				—	—				—	—
Total discharged from bankruptcy	14	2,020			2	288				26	2,177				5	233
Total originated restructurings	61	$	13,063		9	$	1,315			52	$	10,257			8	$	1,856
The following tables provide the types of TDRs made during the three months ended March 31, 2014 and March 31, 2013 for acquired loans, as well as a summary of acquired loans that were modified as a TDR during the 12 months ended March 31, 2014 and March 31, 2013 that subsequently defaulted during the three months ended March 31, 2014 and March 31, 2013. BancShares defines payment default as movement of the TDR to nonaccrual status, which is generally 30 days past due for TDRs, foreclosure or charge-off, whichever occurs first.
	Three months ended March 31, 2014									Three months ended March 31, 2013
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
(Dollars in thousands)	Number of loans	Recorded investment at period end			Number of loans	Recorded investment at period end				Number of loans	Recorded investment at period end				Number of loans	Recorded investment at period end
Acquired loans
Interest only period provided
Commercial mortgage	2	$	15,906		2	$	15,906			2	$	1,991			1	$	291
Residential mortgage	—	—			—	—				—	—				1	97
Total interest only	2	15,906			2	15,906				2	1,991				2	388
Loan term extension
Construction and land development - commercial	1	281			—	—				—	—				—	—
Total loan term extension	1	281			—	—				—	—				—	—
Below market interest rate
Construction and land development - commercial	1	37			—	—				1	309				—	—
Commercial mortgage	4	5,439			1	47				1	2,946				3	3,222
Commercial and industrial	—	—			—	—				2	458				—	—
Residential mortgage	1	102			1	436				2	726				2	726
Total below market interest rate	6	5,578			2	483				6	4,439				5	3,948
Total acquired restructurings	9	$	21,765		4	$	16,389			8	$	6,430			7	$	4,336
For the three months ended March 31, 2014 and March 31, 2013, the recorded investment in TDRs subsequent to modification was not materially impacted by the modification since forgiveness of principal is not a restructuring option frequently used by BancShares.
The following tables provide information on originated loans and leases that are individually evaluated for impairment as of March 31, 2014 and December 31, 2013.
	March 31, 2014
(Dollars in thousands)	With a			With no				Total				Unpaid				Related
	recorded			recorded								principal				allowance
	allowance			allowance								balance				recorded
Impaired originated loans and leases
Construction and land development - commercial	$	1,646		$	683			$	2,329			$	3,294			$	144
Commercial mortgage	57,568			31,419				88,987				94,950				6,400
Other commercial real estate	755			872				1,627				2,027				203
Commercial and industrial	6,530			2,274				8,804				10,055				769
Lease financing	238			155				393				393				13
Residential mortgage	10,624			5,002				15,626				16,026				1,418
Revolving mortgage	3,210			377				3,587				4,618				353
Construction and land development - noncommercial	699			—				699				699				77
Consumer	1,015			—				1,015				1,039				118
Total impaired originated loans and leases	$	82,285		$	40,782			$	123,067			$	133,101			$	9,495
	December 31, 2013
	With a			With no				Total				Unpaid				Related
	recorded			recorded								principal				allowance
	allowance			allowance								balance				recorded
Impaired originated loans and leases
Construction and land development - commercial	$	1,025		$	1,247			$	2,272			$	7,306			$	103
Commercial mortgage	57,819			39,292				97,111				103,522				6,873
Other commercial real estate	783			1,095				1,878				2,279				209
Commercial and industrial	7,197			2,103				9,300				10,393				771
Lease financing	133			55				188				188				54
Residential mortgage	11,534			4,005				15,539				15,939				1,586
Revolving mortgage	3,382			214				3,596				3,596				372
Construction and land development - noncommercial	651			457				1,108				1,108				72
Consumer	1,154			—				1,154				1,154				121
Total impaired originated loans and leases	$	83,678		$	48,468			$	132,146			$	145,485			$	10,161
The following tables show the average impaired originated loan balance and the interest income recognized by loan class for the three months ended March 31, 2014 and March 31, 2013:
	Three months ended March 31, 2014
(Dollars in thousands)	Average			Interest income recognized
	balance
Impaired originated loans and leases:
Construction and land development - commercial	$	1,031		$	15
Commercial mortgage	94,547			1,120
Other commercial real estate	1,796			21
Commercial and industrial	10,234			118
Lease financing	284			4
Residential mortgage	16,482			174
Revolving mortgage	3,892			27
Construction and land development - noncommercial	2,322			29
Consumer	1,059			5
Total impaired originated loans and leases	$	131,647		$	1,513
	Three months ended March 31, 2013
	Average			Interest income recognized
	balance
Impaired originated loans and leases:
Construction and land development - commercial	$	9,284		$	112
Commercial mortgage	103,848			1,425
Other commercial real estate	3,179			45
Commercial and industrial	18,997			266
Lease financing	355			6
Residential mortgage	17,330			228
Revolving mortgage	5,472			25
Construction and land development - noncommercial	866			11
Consumer	1,683			5
Total impaired originated loans and leases	$	161,014		$	2,123

Other_Real_Estate_Owned

Other Real Estate Owned	3 Months Ended
	Mar. 31, 2014
Banking and Thrift [Abstract]	'
Other Real Estate Owned	'
	Other Real Estate Owned
	The following table explains changes in other real estate owned during the three months ended March 31, 2014 and March 31, 2013.
	(Dollars in thousands)	Covered			Noncovered			Total
	Balance at December 31, 2012	$	102,577		$	43,513		$	146,090
	Additions	29,370			8,763			38,133
	Sales	(27,316		)	(6,347		)	(33,663		)
	Writedowns	(2,730		)	(1,101		)	(3,831		)
	Balance at March 31, 2013	$	101,901		$	44,828		$	146,729
	Balance at December 31, 2013	$	47,081		$	36,898		$	83,979
	Additions 1	1,514			14,909			16,423
	Sales	(4,512		)	(5,854		)	(10,366		)
	Writedowns	(2,228		)	(1,449		)	(3,677		)
	Balance at March 31, 2014	$	41,855		$	44,504		$	86,359
	1 Noncovered additions include $11.6 million from the 1st Financial merger.

Receivable_from_FDIC_for_Loss_

Receivable from FDIC for Loss Share Agreements	3 Months Ended
	Mar. 31, 2014
Receivable From FDIC For Loss Share Agreements [Abstract]	'
Receivable from FDIC for Loss Share Agreements	'
	FDIC Loss Share Receivable
	The following table provides changes in the receivable from the FDIC for the three-month periods ended March 31, 2014 and March 31, 2013.
		Three months ended March 31
	(Dollars in thousands)	2014			2013
	Balance at January 1	$	93,397		$	270,192
	Amortization	(17,744		)	(26,112		)
	Cash payments to (from) FDIC	3,490			(42,519		)
	Post-acquisition adjustments	(4,359		)	(5,619		)
	Balance at March 31	$	74,784		$	195,942
	The receivable from the FDIC for loss share agreements is measured separately from the related covered assets and is recorded at fair value at the acquisition date using projected cash flows based on the expected reimbursements for losses and the applicable loss share percentages. See Note J for information related to FCB's recorded payable to the FDIC for loss share agreements.
	Cash payments to (from) the FDIC represent the net impact of loss share loan recoveries, charge-offs and related expenses as calculated and reported in our FDIC loss share certificates. Post-acquisition adjustments represent the net change in loss estimates related to acquired loans and covered OREO as a result of changes in expected cash flows and the allowance for loan and lease losses related to those covered loans. For loans covered by loss share agreements, subsequent decreases in the amount expected to be collected from the borrower or collateral liquidation result in a provision for loan and lease losses, an increase in the allowance for loan and lease losses and a proportional adjustment to the receivable from the FDIC for the estimated amount to be reimbursed. Subsequent increases in the amount expected to be collected from the borrower or collateral liquidation result in the reversal of some or all previously recorded provision for loan and lease losses, a decrease in the related allowance for loan and lease losses and a proportional adjustment to the receivable from the FDIC, or prospective adjustment to the accretable yield and the related receivable from the FDIC if no provision for loan and lease losses had been recorded previously.

Estimated_Fair_Values

Estimated Fair Values	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Estimated Fair Values	'
	Estimated Fair Values
	Fair value estimates are intended to represent the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. Where there is no active market for a financial instrument, BancShares has made estimates using discounted cash flow or other valuation techniques. Inputs to these valuation methods are subjective in nature, involve uncertainties and require significant judgment and therefore cannot be determined with precision. Accordingly, the derived fair value estimates presented below are not necessarily indicative of the amounts BancShares could realize in a current market exchange.
	Assets and liabilities are recorded at fair value according to a fair value hierarchy comprised of three levels. The levels are based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. The level within the fair value hierarchy for an asset or liability is based on the highest level of input that is significant to the fair value measurement (with level 1 considered highest and level 3 considered lowest). A brief description of each level follows:
	•	Level 1 values are based on quoted prices for identical instruments in active markets.
	•	Level 2 values are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market.
	•	Level 3 values are generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates that market participants would use in pricing the asset or liability. Valuation techniques include the use of discounted cash flow models and similar techniques.
	The methodologies used to estimate the fair value of financial assets and financial liabilities are discussed below:
	Investment securities available for sale. U.S.Treasury, government agency, mortgage-backed securities and municipal securities are generally measured at fair value using a third party pricing service and are classified as level 2 instruments. Equity securities are measured at fair value using observable closing prices. Management also considers the level of market activity by examining the trade volume of each security. Due to the relatively inactive nature of the markets for the existing equity securities, the inputs used for these equity securities are considered level 2 inputs.
	Loans held for sale. Loans held for sale are carried at the lower of aggregate cost or fair value and are, therefore, carried at fair value only when fair value is less than the asset cost. These loans are generally traded in active secondary markets and are priced using current market pricing for similar securities adjusted for servicing, interest rate risk and credit risk. Accordingly, the inputs used to calculate fair value of residential real estate loans are classified as Level 2 inputs.
	Loans and leases (acquired and originated). For variable rate loans, carrying value is a reasonable estimate of fair value. For fixed rate loans, fair values are estimated based on discounted future cash flows using the current interest rates at which loans with similar terms would be made to borrowers of similar credit quality. Additional valuation adjustments are made for liquidity and credit risk. The inputs used in the fair value measurements for loans and leases are considered level 3 inputs.
	Receivable from the FDIC for loss share agreements. Fair value is estimated based on discounted future cash flows using current discount rates. Due to post-acquisition improvements in expected losses, significant portions of the FDIC receivable will be recovered through amortization of the receivable over the remaining life of the loss share agreement rather than by cash flows from the FDIC. The estimated amounts to be amortized in future periods have no fair value. The inputs used in the fair value measurement for the FDIC receivable are considered level 3 inputs. The FDIC loss share agreements are not transferable and, accordingly, there is no market for this receivable.
	FHLB stock. The carrying amount of FHLB stock is a reasonable estimate of fair value as these securities are not readily marketable and are evaluated for impairment based on the ultimate recoverability of the par value. BancShares considers positive and negative evidence, including the profitability and asset quality of the issuer, dividend payment history and recent redemption experience, when determining the ultimate recoverability of the par value. BancShares believes its investment in FHLB stock is ultimately recoverable at par. The inputs used in the fair value measurement for the FHLB stock are considered level 2 inputs.
	Preferred stock issued under the TARP program and other acquired financial assets. Preferred securities issued under the Troubled Asset Recovery Program are recorded at cost and are evaluated quarterly for impairment based on the ultimate recoverability of the purchase price. The fair value of these securities is derived from a third-party proprietary model that is considered to be a level 3 input. Other acquired financial assets represent acquired investments in various entities for Community Reinvestment Act and correspondent banking purposes. These investments were recorded at fair value at acquisition date based on level 2 inputs.
	Deposits. For non-time deposits and variable rate time deposits, carrying value is a reasonable estimate of fair value. The fair value of fixed rate time deposits is estimated by discounting future cash flows using the interest rates currently offered for deposits of similar remaining maturities. The inputs used in the fair value measurement for deposits are considered level 2 inputs.
	Long-term obligations. For fixed rate trust preferred securities, the fair values are determined based on recent trades of the actual security. For other long-term obligations, fair values are estimated by discounting future cash flows using current interest rates for similar financial instruments. The inputs used in the fair value measurement for long-term obligations are considered level 2 inputs.
	Payable to the FDIC for loss share agreements. The fair value of the payable to the FDIC for loss share agreements is determined by the projected cash flows based on expected payments to the FDIC in accordance with the loss share agreements. Cash flows are discounted to reflect the timing of the estimated amounts due to the FDIC. The inputs used in the fair value measurement for the payable to the FDIC are considered level 3 inputs. See Note J for more information on the payable to the FDIC.
	Interest rate swap. Under the terms of the existing cash flow hedge, BancShares pays a fixed payment to the counterparty in exchange for receipt of a variable payment that is determined based on the three-month LIBOR rate. The fair value of the cash flow hedge is, therefore, based on projected LIBOR rates for the duration of the hedge, values that, while observable in the market, are subject to adjustment due to pricing considerations for the specific instrument. The inputs used in the fair value measurement of the interest rate swap are considered level 2 inputs.
	Off-balance-sheet commitments and contingencies. Carrying amounts are reasonable estimates of the fair values for such financial instruments. Carrying amounts include unamortized fee income and, in some cases, reserves for any credit losses from those financial instruments. These amounts are not material to BancShares' financial position.
	For all other financial assets and financial liabilities, the carrying value is a reasonable estimate of the fair value as of March 31, 2014 and December 31, 2013. The carrying value and fair value for these assets and liabilities are equivalent because they are relatively short term in nature and there is no interest rate or credit risk that would cause the fair value to differ from the carrying value.
	(Dollars in thousands)	March 31, 2014				December 31, 2013
		Carrying value		Fair value		Carrying value		Fair value
	Cash and due from banks	$	543,471	$	543,471	$	533,599	$	533,599
	Overnight investments	1,161,469		1,161,469		859,324		859,324
	Investment securities available for sale	5,676,237		5,676,237		5,387,703		5,387,703
	Investment securities held to maturity	782		835		907		974
	Loans held for sale	53,361		54,057		47,271		47,956
	Acquired loans, net of allowance for loan and lease losses	1,225,825		1,201,309		975,906		956,388
	Originated loans, net of allowance for loan and lease losses	12,022,277		11,659,364		11,924,424		11,589,149
	Receivable from the FDIC for loss share agreements (1)	74,784		37,303		93,397		38,438
	Income earned not collected	49,668		49,668		48,390		48,390
	Federal Home Loan Bank stock	34,417		34,417		40,819		40,819
	Preferred stock and other acquired financial assets	17,783		18,521		33,564		34,786
	Deposits	18,763,545		18,785,474		17,874,066		17,898,570
	Short-term borrowings	617,794		617,794		511,418		511,418
	Long-term obligations	440,300		453,313		510,769		526,037
	Payable to the FDIC for loss share agreements	111,339		115,129		109,378		111,941
	Accrued interest payable	5,675		5,675		6,737		6,737
	Interest rate swap	6,501		6,501		7,220		7,220
	(1) The fair value of the FDIC receivable excludes amortization expected to be recognized in prospective periods.
	Among BancShares’ assets and liabilities, investment securities available for sale and interest rate swaps accounted for as cash flow hedges are reported at their fair values on a recurring basis. Certain other assets are adjusted to their fair value on a nonrecurring basis, including loans held for sale, which are carried at the lower of cost or fair value, and impaired loans, OREO, goodwill and other intangible assets, which are periodically tested for impairment. Non-impaired loans held for investment, deposits, short-term borrowings and long-term obligations are not reported at fair value. BancShares did not elect to voluntarily report any assets or liabilities at fair value.
	For assets and liabilities carried at fair value on a recurring basis, the following table provides fair value information as of March 31, 2014 and December 31, 2013.
		March 31, 2014
				Fair value measurements using:
	(Dollars in thousands)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
	Assets measured at fair value
	Investment securities available for sale
	U.S. Treasury	$	1,273,221	$	—	$	1,273,221	$	—
	Government agency	1,812,774		—		1,812,774		—
	Mortgage-backed securities	2,566,666		—		2,566,666		—
	Equity securities	22,560		—		22,560		—
	Municipal securities	186		—		186		—
	Other	830		—		830		—
	Total	$	5,676,237	$	—	$	5,676,237	$	—
	Liabilities measured at fair value
	Interest rate swaps accounted for as cash flow hedges	$	6,501	$	—	$	6,501	$	—
		December 31, 2013
				Fair value measurements using:
		Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
	Assets measured at fair value
	Investment securities available for sale
	U.S. Treasury	$	373,437	$	—	$	373,437	$	—
	Government agency	2,544,229		—		2,544,229		—
	Mortgage-backed securities	2,446,873		—		2,446,873		—
Equity securities	22,147		—		22,147		—
Municipal securities	187		—		187		—
Other	830		—		830		—
Total	$	5,387,703	$	—	$	5,387,703	$	—
Liabilities measured at fair value
Interest rate swaps accounted for as cash flow hedges	$	7,220	$	—	$	7,220	$	—
There were no transfers between levels during the three months ended March 31, 2014.
Certain financial assets and liabilities are carried at fair value on a nonrecurring basis, including loans held for sale, impaired loans and OREO.
Loans held for sale are carried at the lower of aggregate cost or fair value and are, therefore, carried at fair value only when fair value is less than the asset cost. These loans are generally traded in active secondary markets and are priced using current market pricing for similar securities adjusted for servicing, interest rate risk and credit risk. Accordingly, residential real estate loans held for sale are classified as Level 2.
Impaired loans are deemed to be at fair value if an associated allowance or current period charge-off has been recorded. The value of impaired loans is determined by either collateral valuations or discounted present value of the expected cash flow calculations. Collateral values are determined using appraisals or other third-party value estimates of the subject property with discounts generally between 10 and 14 percent applied for estimated holding and selling costs and other external factors that may impact the marketability of the property. Impaired loans are assigned to an asset manager and monitored monthly for significant changes since the last valuation. If significant changes are noted, the asset manager orders a new valuation or adjusts the valuation accordingly. Expected cash flows are determined using expected loss rates developed from historic experience for loans with similar risk characteristics, discounted using the effective interest rate.
OREO is measured and reported at fair value using collateral valuations. Collateral values are determined using appraisals or other third-party value estimates of the subject property with discounts generally between 10 and 14 percent applied for estimated holding and selling costs and other external factors that may impact the marketability of the property. Changes to the value of the assets between scheduled valuation dates are monitored through continued communication with brokers and monthly reviews by the asset manager assigned to each asset. The asset manager uses the information gathered from brokers and other market sources to identify any significant changes in the market or the subject property as they occur. Valuations are then adjusted or new appraisals are ordered to ensure the reported values reflect the most current information. OREO that has been recently remeasured is deemed to be at fair value and included in the table below.
For financial assets and liabilities carried at fair value on a nonrecurring basis, the following table provides fair value information as of March 31, 2014 and December 31, 2013.
	March 31, 2014
			Fair value measurements using:
(Dollars in thousands)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Loans held for sale	$	14,911	$	—	$	14,911	$	—
Originated impaired loans	73,301		—		—		73,301
Other real estate not covered under loss share agreements remeasured during current year	17,678		—		—		17,678
Other real estate covered under loss share agreements remeasured during current year	32,402		—		—		32,402
	December 31, 2013
			Fair value measurements using:
	Fair value
			Level 1 inputs		Level 2 inputs		Level 3 inputs
Loans held for sale	29,389		—		29,389		—
Originated impaired loans	77,817		—		—		77,817
Other real estate not covered under loss share agreements remeasured during current year	20,526		—		—		20,526
Other real estate covered under loss share agreements remeasured during current year	37,587		—		—		37,587
No financial liabilities were carried at fair value on a nonrecurring basis as of March 31, 2014 and December 31, 2013.

Employee_Benefit_Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2014
General Discussion of Pension and Other Postretirement Benefits [Abstract]	'
Employee Benefit Plans	'
	Employee Benefit Plans
	Pension expense is a component of employee benefits expense. For the three-month periods ended March 31, 2014 and March 31, 2013, the components of pension expense are as follows:
		Three months ended March 31
	(Dollars in thousands)	2014			2013
	Service cost	$	3,381		$	4,222
	Interest cost	6,556			5,895
	Expected return on assets	(7,812		)	(6,931		)
	Amortization of prior service cost	53			53
	Amortization of net actuarial loss	1,546			4,251
	Total pension expense	$	3,724		$	7,490
	The assumed discount rate for 2014 is 4.90 percent, the expected long-term rate of return on plan assets is 7.50 percent and the assumed rate of salary increases is 4.00 percent. For 2013 the assumed discount rate was 4.00 percent, expected long-term rate of return was 7.25 percent and the assumed rate of salary increases was 4.00 percent.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	To meet the financing needs of its customers, BancShares and its subsidiaries have financial instruments with off-balance sheet risk. These financial instruments include commitments to extend credit, standby letters of credit and recourse obligations on mortgage loans sold. These instruments involve elements of credit, interest rate or liquidity risk.
	Commitments to extend credit are legally binding agreements to lend to customers. Commitments generally have fixed expiration dates or other termination clauses and may require payment of fees. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future liquidity requirements. Established credit standards control the credit risk exposure associated with these commitments. In some cases, BancShares requires that collateral be pledged to secure the commitment, including cash deposits, securities and other assets. At March 31, 2014, BancShares had unused commitments totaling $6.11 billion, compared to $5.84 billion at December 31, 2013.
	Standby letters of credit are commitments guaranteeing performance of a customer to a third party. Those commitments are primarily issued to support public and private borrowing arrangements. To mitigate its risk, BancShares’ follows its credit policies in the issuance of standby letters of credit. At March 31, 2014 and December 31, 2013, BancShares had standby letters of credit amounting to $52.3 million and $54.8 million, respectively. The credit risk related to the issuance of these letters of credit is essentially the same as that involved in extending loans to clients and, therefore, these letters of credit are collateralized when necessary.
	Pursuant to standard representations and warranties relating to residential mortgage loan sales, contingent obligations exist for various events that may occur following the loan sale. If underwriting or documentation deficiencies are discovered at any point in the life of the loan or if the loan becomes nonperforming within 120 days of its sale, the investor may require BancShares to repurchase the loan or to repay a portion of the sale proceeds. Other liabilities included reserves of $3.6 million as of March 31, 2014, unchanged from December 31, 2013, for estimated losses arising from these standard representation and warranty provisions.
	BancShares has recorded a receivable from the FDIC totaling $74.8 million and $93.4 million as of March 31, 2014 and December 31, 2013 for the expected reimbursement of losses on assets covered under the various loss share agreements. These loss share agreements impose certain obligations on us that, in the event of noncompliance, could result in the delay or disallowance of some or all of our rights under those agreements. Requests for reimbursement are subject to FDIC review and may be delayed or disallowed for noncompliance. The loss share agreements are subject to interpretation by both the FDIC and FCB, and disagreements may arise regarding coverage of losses, expenses and contingencies.
	The loss share agreements for four FDIC-assisted transactions include provisions related to contingent payments that may be owed to the FDIC at the termination of the agreements (clawback liability).The clawback liability represents a payment by BancShares to the FDIC if actual cumulative losses on acquired covered assets are lower than the cumulative losses originally estimated by the FDIC at the time of acquisition. The clawback liability is estimated by discounting estimated future payments and is recorded in the Consolidated Balance Sheets as a payable to the FDIC under the relevant loss share agreements. As of March 31, 2014 and December 31, 2013, the estimated clawback liability was $111.3 million and $109.4 million, respectively.
	BancShares and various subsidiaries have been named as defendants in legal actions arising from their normal business activities in which damages in various amounts are claimed. BancShares is also exposed to litigation risk relating to the prior business activities of banks from which assets were acquired and liabilities assumed in the various FDIC-assisted transactions. Although the amount of any ultimate liability with respect to such matters cannot be determined, in the opinion of management, any such liability will not have a material effect on BancShares’ consolidated financial statements.

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2014
Summary of Derivative Instruments [Abstract]	'
Derivatives	'
	Derivatives
	At March 31, 2014, BancShares had an interest rate swap entered into during 2011 that qualifies as a cash flow hedge under GAAP. For all periods presented, the fair value of the outstanding derivative is included in other liabilities in the consolidated balance sheets, and the net change in fair value is included in the consolidated statements of cash flows under the caption net change in other liabilities.
	The interest rate swap is used for interest rate risk management purposes and converts variable-rate exposure on outstanding debt to a fixed rate. The 2011 interest rate swap has a notional amount of $93.5 million, representing the amount of variable rate trust preferred capital securities issued during 2006 and still outstanding at the swap inception date. The 2011 interest rate swap hedges interest payments through June 2016 and requires fixed-rate payments by BancShares at 5.50 percent in exchange for variable-rate payments of 175 basis points above the three-month LIBOR, which is equal to the interest paid to the holders of the trust preferred capital securities. Settlement of the swap occurs quarterly. As of March 31, 2014, collateral with a fair value of $7.0 million was pledged to secure the existing obligation under the interest rate swap.
		March 31, 2014				December 31, 2013
	(Dollars in thousands)	Notional  amount		Estimated fair value of liability		Notional  amount		Estimated fair value of liability
	2011 interest rate swap hedging variable rate exposure on trust preferred securities 2011-2016	$	93,500	$	6,501	$	93,500	$	7,220
	For cash flow hedges, the effective portion of the gain or loss due to changes in the fair value of the derivative hedging instrument is included in other comprehensive income, while the ineffective portion, representing the excess of the cumulative change in the fair value of the derivative over the cumulative change in expected future discounted cash flows on the hedged transaction, is recorded in the consolidated income statement. BancShares’ interest rate swap has been fully effective since inception. Therefore, changes in the fair value of the interest rate swap has had no impact on net income. For the three months ended March 31, 2014 and March 31, 2013, BancShares recognized interest expense of $0.8 million during both periods, resulting from incremental interest paid to the interest rate swap counterparty, none of which related to ineffectiveness. BancShares monitors the credit risk of the interest rate swap counterparty.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Accumulated Other Comprehensive Loss	'
	Accumulated Other Comprehensive Loss
	Accumulated other comprehensive loss included the following as of March 31, 2014 and December 31, 2013:
		March 31, 2014										December 31, 2013
	(Dollars in thousands)	Accumulated				Deferred			Accumulated			Accumulated			Deferred			Accumulated
		other				tax			other			other			tax			other
		comprehensive				benefit			comprehensive			comprehensive			benefit			comprehensive
		loss							loss,			loss						loss,
									net of tax									net of tax
	Unrealized losses on investment securities available for sale, net	$	(4,733	)		$	(1,898	)	$	(2,835	)	$	(16,632	)	$	(6,541	)	$	(10,091	)
	Unrealized loss on cash flow hedge	(6,501		)		(2,508		)	(3,993		)	(7,220		)	(2,786		)	(4,434		)
	Funded status of defined benefit plan	(15,983		)		(6,217		)	(9,766		)	(17,582		)	(6,839		)	(10,743		)
	Total	$	(27,217	)		$	(10,623	)	$	(16,594	)	$	(41,434	)	$	(16,166	)	$	(25,268	)
	The following table highlights changes in accumulated other comprehensive loss by component for the three months ended March 31, 2014 and March 31, 2013:
		Three months ended March 31, 2014
	(Dollars in thousands)	Unrealized gains and losses on available for sale securities1				Gains and losses on cash flow hedges1			Defined benefit pension items1			Total
	Beginning balance	$	(10,091	)		$	(4,434	)	$	(10,743	)	$	(25,268	)
	Other comprehensive income before reclassifications	7,256				441			—			7,697
	Amounts reclassified from accumulated other comprehensive loss	—				—			977			977
	Net current period other comprehensive income	7,256				441			977			8,674
	Ending balance	$	(2,835	)		$	(3,993	)	$	(9,766	)	$	(16,594	)
		Three months ended March 31, 2013
		Unrealized gains and losses on available for sale securities1				Gains and losses on cash flow hedges1			Defined benefit pension items1			Total
	Beginning balance	$	20,517			$	(6,292	)	$	(96,331	)	$	(82,106	)
	Other comprehensive income before reclassifications	(911		)		493			—			(418		)
	Amounts reclassified from accumulated other comprehensive loss	—				—			2,619			2,619
	Net current period other comprehensive (loss) income	(911		)		493			2,619			2,201
	Ending balance	$	19,606			$	(5,799	)	$	(93,712	)	$	(79,905	)
	1 All amounts are net of tax. Amounts in parentheses indicate debits.
			Three months ended March 31, 2014
	Details about accumulated other comprehensive loss		Amount reclassified from accumulated other comprehensive income1				Affected line item in the statement where net income is presented
	(Dollars in thousands)
	Amortization of defined benefit pension items
	Prior service costs		$	(53	)		Employee benefits
	Actuarial losses		(1,546		)		Employee benefits
			(1,599		)		Income before income taxes
			622				Income taxes
			$	(977	)		Net income
	Total reclassifications for the period		$	(977	)
			Three months ended March 31, 2013
	Details about accumulated other comprehensive loss		Amount reclassified from accumulated other comprehensive income1				Affected line item in the statement where net income is presented
	Amortization of defined benefit pension items
	Prior service costs		$	(53	)		Employee benefits
	Actuarial losses		(4,251		)		Employee benefits
			(4,304		)		Income before income taxes
			1,685				Income taxes
			$	(2,619	)		Net income
	Total reclassifications for the period		$	(2,619	)
	1 Amounts in parentheses indicate debits to profit/loss.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	Subsequent Events
	On April 29, 2014, at the 2014 annual meeting of shareholders, shareholders approved an amendment to BancShares' charter that authorizes a new class of preferred stock. Under the terms of the charter amendment, BancShares has authority to issue up to 10,000,000 shares of preferred stock with a par value of $0.01.
	On April 29, 2014, shareholders also approved a long-term incentive plan that is intended to provide selected salaried employees of FCB or any of its affiliates with opportunities to earn awards in the form of cash bonuses based upon attainment of pre-established, objective performance goals.

Accounting_Policies_and_Basis_1

Accounting Policies and Basis of Presentation Policies (Policies)	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Reclassification, Policy [Policy Text Block]	'
	Reclassifications
	In certain instances, amounts reported in prior years' consolidated financial statements have been reclassified to conform to the current financial statement presentation. Such reclassifications had no effect on previously reported cash flows, shareholders' equity or net income.
Use of Estimates, Policy [Policy Text Block]	'
	Use of Estimates in the Preparation of Financial Statements
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates, and different assumptions in the application of these policies could result in material changes in BancShares' consolidated financial position, the consolidated results of its operations or related disclosures. Material estimates that are particularly susceptible to significant change include the determination of the allowance for loan and lease losses; determination of the fair value of financial instruments; pension plan assumptions; cash flow estimates on acquired loans; the receivable from and payable to the FDIC for loss share agreements; purchase accounting-related adjustments; and income tax assets, liabilities and expense.
New Accounting Pronouncements, Policy [Policy Text Block]	'
	Recent Accounting Pronouncements
	Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU ) 2014-04, “Receivables-Troubled Debt Restructurings by Creditors (Subtopic 310-40)”
	This ASU clarifies that an in-substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction.
	The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. We will adopt the guidance effective the first quarter of 2015, and we do not anticipate any effect on our consolidated financial position or consolidated results of operations as a result of adoption.
	FASB ASU 2013-11, “Income Taxes (Topic 740)”
	This ASU states that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows: to the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require BancShares to use, and BancShares does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The assessment of whether a deferred tax asset is available is based on the unrecognized tax benefit and deferred tax asset that exist at the reporting date and should be made presuming disallowance of the tax position at the reporting date.
	The provisions of this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. BancShares adopted the guidance effective first quarter of 2014. The initial adoption had no effect on our consolidated financial position or consolidated results of operations.
	FASB ASU 2013-04, “Liabilities”
	This ASU provides guidance for the recognition, measurement, and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of this ASU is fixed at the reporting date, except for obligations addressed within existing guidance in GAAP.
	The amendments in this update are effective for fiscal years beginning after December 31, 2013. BancShares adopted the guidance effective first quarter of 2014. The initial adoption did not have any effect on our consolidated financial position or consolidated results of operations.

Business_Combinations_Tables

Business Combinations (Tables)	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Schedule of assets acquired and liabilities assumed	'
	The following table provides the carrying value of acquired assets and assumed liabilities, as recorded by 1st Financial, the fair value adjustments calculated at the time of the merger and the resulting fair value recorded by FCB.
		January 1, 2014
	(Dollars in thousands)	As recorded by			Fair value adjustments			As recorded by FCB
		1st Financial
	Assets
	Cash and cash equivalents	$	28,194		$	—		$	28,194
	Investment securities	246,890			(9,452		)	237,438
	Loans held for sale	1,183			—			1,183
	Restricted equity securities	3,105			671			3,776
	Loans	338,170			(21,843		)	316,327
	Less: allowance for loan losses	(7,796		)	7,796			—
	Premises and equipment	3,871			(1,185		)	2,686
	Other real estate owned	12,896			(1,305		)	11,591
	Intangible asset	—			3,780			3,780
	Other assets	16,811			(465		)	16,346
	Total assets acquired	$	643,324		$	(22,003	)	$	621,321
	Liabilities
	Deposits:
	Noninterest-bearing	$	152,444		$	—		$	152,444
	Interest-bearing	477,881			1,546			479,427
	Total deposits	630,325			1,546			631,871
	Short-term borrowings	406			—			406
	Other liabilities	3,392			167			3,559
	Total liabilities assumed	$	634,123		$	1,713		635,836
	Fair value of net liabilities assumed							14,515
	Cash paid to shareholders							2,000
	Cash paid to acquire TARP securities							8,000
	Goodwill recorded for 1st Financial							$	24,515
Loans acquired, cash flows expected	'
	For loans acquired from 1st Financial, the contractually required payments including principal and interest, cash flows expected to be collected and fair values as of the merger date were:
	(Dollars in thousands)	January 1, 2014
	Contractually required payments	$	414,233
	Cash flows expected to be collected	400,622
	Fair value at acquisition date	316,327
	The following table documents changes to the amount of accretable yield for the first three months of 2014 and 2013.
	(Dollars in thousands)	2014			2013
	Balance at January 1	$	439,990		$	539,564
	Additions	84,295			—
	Accretion	(30,200		)	(79,886		)
	Reclassifications from (to) nonaccretable difference	6,048			(11,653		)
	Changes in expected cash flows that do not affect nonaccretable difference	(9,888		)	37,910
	Balance at March 31	$	490,245		$	485,935
Fair value of loans acquired	'
	The recorded fair values of loans acquired in the 1st Financial transaction as of the merger date were as follows:
	(Dollars in thousands)	January 1, 2014
	Commercial:
	Construction and land development	$	41,516
	Commercial mortgage	123,925
	Other commercial real estate	6,698
	Commercial and industrial	29,126
	Total commercial loans	201,265
	Noncommercial:
	Residential mortgage	113,177
	Consumer	1,885
	Total noncommercial loans	115,062
	Total loans acquired from 1st Financial	$	316,327

Investments_Tables

Investments (Tables)	3 Months Ended
	Mar. 31, 2014
Investments [Abstract]	'
Aggregate Values And Unrealized Gains And Losses Of Investment Securities	'
	The amortized cost and fair value of investment securities classified as available for sale and held to maturity at March 31, 2014 and December 31, 2013, are as follows:
		March 31, 2014
	(Dollars in thousands)	Cost		Gross		Gross unrealized		Fair
				unrealized		losses		value
				gains
	Investment securities available for sale
	U.S. Treasury	$	1,274,716	$	379	$	1,874	$	1,273,221
	Government agency	1,811,889		1,764		879		1,812,774
	Mortgage-backed securities	2,592,766		5,524		31,624		2,566,666
	Equity securities	543		22,017		—		22,560
	Municipal securities	186		—		—		186
	Other	870		—		40		830
	Total investment securities available for sale	$	5,680,970	$	29,684	$	34,417	$	5,676,237
		December 31, 2013
		Cost		Gross		Gross unrealized		Fair
				unrealized		losses		value
				gains
	U.S. Treasury	$	373,223	$	259	$	45	$	373,437
	Government agency	2,543,223		1,798		792		2,544,229
	Mortgage-backed securities	2,486,297		4,526		43,950		2,446,873
	Equity securities	543		21,604		—		22,147
	Municipal securities	186		1		—		187
	Other	863		—		33		830
	Total investment securities available for sale	$	5,404,335	$	28,188	$	44,820	$	5,387,703
		March 31, 2014
		Cost		Gross		Gross unrealized		Fair
				unrealized		losses		value
				gains
	Investment securities held to maturity
	Mortgage-backed securities	$	782	$	53	$	—	$	835
		December 31, 2013
		Cost		Gross		Gross unrealized		Fair
				unrealized		losses		value
				gains
	Mortgage-backed securities	$	907	$	67	$	—	$	974
Investment Securities Maturity Information	'
	The following table provides the amortized cost and fair value by contractual maturity. Expected maturities will differ from contractual maturities because borrowers and issuers may have the right to call or prepay obligations with or without prepayment penalties. Repayments of mortgage-backed securities are dependent on the repayments of the underlying loan balances. Equity securities do not have a stated maturity date.
		March 31, 2014				December 31, 2013
	(Dollars in thousands)	Cost		Fair		Cost		Fair
				value				value
	Investment securities available for sale
	Amortizing securities maturing in:
	One year or less	$	829,091	$	829,997	$	839,956	$	840,883
	One through five years	2,258,570		2,257,014		2,077,539		2,077,800
	Mortgage-backed securities	2,592,766		2,566,666		2,486,297		2,446,873
	Equity securities	543		22,560		543		22,147
	Total investment securities available for sale	$	5,680,970	$	5,676,237	$	5,404,335	$	5,387,703
	Investment securities held to maturity
	Mortgage-backed securities held to maturity	$	782	$	835	$	907	$	974
Securities Gains (Losses)	'
	There were no realized securities gains (losses) during any period presented.
Investment Securities With Unrealized Losses	'
	The following table provides information regarding securities with unrealized losses as of March 31, 2014 and December 31, 2013.
		March 31, 2014
		Less than 12 months				12 months or more				Total
	(Dollars in thousands)	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
		Value		Losses		Value		Losses		Value		Losses
	Investment securities available for sale:
	U.S. Treasury	$	699,985	$	1,874	$	—	$	—	$	699,985	$	1,874
	Government agency	400,423		879		—		—		400,423		879
	Mortgage-backed securities	2,012,814		30,816		23,622		808		2,036,436		31,624
	Other	830		40		—		—		830		40
	Total	$	3,114,052	$	33,609	$	23,622	$	808	$	3,137,674	$	34,417
		December 31, 2013
		Less than 12 months				12 months or more				Total
		Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
		Value		Losses		Value		Losses		Value		Losses
	Investment securities available for sale:
	U.S. Treasury	$	102,105	$	45	$	—	$	—	$	102,105	$	45
	Government agency	780,552		761		29,969		31		810,521		792
	Mortgage-backed securities	2,221,213		42,876		26,861		1,074		2,248,074		43,950
	Other	830		33		—		—		830		33
	Total	$	3,104,700	$	43,715	$	56,830	$	1,105	$	3,161,530	$	44,820

Loans_and_Leases_Tables

Loans and Leases (Tables)	3 Months Ended
	Mar. 31, 2014
Loans and Leases Receivable Disclosure [Abstract]	'
Loans and Leases	'
	Loans and Leases
	Loans and leases outstanding, by class, include the following as of the dates indicated:
	(Dollars in thousands)	March 31, 2014			December 31, 2013
	Acquired loans
	Commercial:
	Construction and land development	$	106,670		$	78,915
	Commercial mortgage	728,872			642,891
	Other commercial real estate	47,826			41,381
	Commercial and industrial	38,838			17,254
	Other	870			866
	Total commercial loans	923,076			781,307
	Noncommercial:
	Residential mortgage	291,254			213,851
	Revolving mortgage	25,776			30,834
	Construction and land development	28,151			2,583
	Consumer	2,561			851
	Total noncommercial loans	347,742			248,119
	Total acquired loans	1,270,818			1,029,426
	Originated loans and leases:
	Commercial:
	Construction and land development	335,271			319,847
	Commercial mortgage	6,330,843			6,362,490
	Other commercial real estate	177,082			178,754
	Commercial and industrial	1,175,543			1,081,158
	Lease financing	394,268			381,763
	Other	179,725			175,336
	Total commercial loans	8,592,732			8,499,348
	Noncommercial:
	Residential mortgage	1,030,032			982,421
	Revolving mortgage	2,091,000			2,113,285
	Construction and land development	119,049			122,792
	Consumer	367,413			386,452
	Total noncommercial loans	3,607,494			3,604,950
	Total originated loans and leases	12,200,226			12,104,298
	Total loans and leases	$	13,471,044		$	13,133,724
	At March 31, 2014, $962.4 million in acquired loans were covered under loss share agreements, compared to $1.03 billion at December 31, 2013. The remaining acquired loans as of March 31, 2014 are from the 1st Financial merger.
	At March 31, 2014, $2.57 billion in originated loans were pledged to secure debt obligations, compared to $2.56 billion at December 31, 2013.
	Credit quality indicators
	Loans and leases are monitored for credit quality on a recurring basis. The credit quality indicators used are dependent on the portfolio segment to which the loan relates. Originated commercial loans and leases, originated noncommercial loans and leases and acquired loans have different credit quality indicators as a result of the unique characteristics relative to each loan segment being evaluated.
	The credit quality indicators for commercial loans and leases are developed through a review of individual borrowers on an ongoing basis. Each commercial loan is evaluated annually with more frequent evaluation of more severely criticized loans or leases. The credit quality indicators for noncommercial loans are based on the delinquency status of the borrower. As the borrower becomes more delinquent, the likelihood of loss increases. Acquired loans are bifurcated into commercial and noncommercial segments and credit quality indicators are assigned in the same manner as the originated portfolio. The indicators represent the rating for loans or leases as of the date presented based on the most recent assessment performed. These credit quality indicators are defined as follows:
	Pass – A pass rated asset is one in which repayment is considered highly likely and there are no observable weaknesses in the asset. Such an asset does not meet any of the characteristics for adverse classification.
	Special mention – A special mention asset has potential weaknesses that deserve management’s close attention. If left uncorrected, such potential weaknesses may result in deterioration of the repayment prospects or collateral position at some future date. Special mention assets are not adversely classified and do not warrant adverse classification.
	Substandard – A substandard asset is inadequately protected by the current net worth and paying capacity of the borrower or of the collateral pledged, if any. Assets classified as substandard generally have a well-defined weakness, or weaknesses, that jeopardize the liquidation of the debt. These assets are characterized by the distinct possibility of loss if the deficiencies are not corrected.
	Doubtful – An asset classified as doubtful has all the weaknesses inherent in an asset classified substandard with the added characteristic that the weaknesses make collection or liquidation in full highly questionable and improbable on the basis of currently existing facts, conditions and values.
	Loss – Assets classified as loss are considered uncollectible and of such little value that it is inappropriate to be carried as an asset. This classification is not necessarily equivalent to no potential for recovery or salvage value, but rather that it is not appropriate to defer a full charge-off even though partial recovery may be effected in the future.
	Ungraded – Ungraded loans represent loans that are not included in the individual credit grading process due to their relatively small balances or borrower type. The majority of originated, ungraded loans at March 31, 2014 and December 31, 2013 relate to business credit cards. Business credit card loans are subject to automatic charge-off when they become 120 days past due in the same manner as unsecured consumer lines of credit. The remaining balance is comprised of a small amount of commercial mortgage loans and other smaller balance consumer loans. Prior to March 31, 2014, ungraded loans also included tobacco buyout loans classified as commercial and industrial loans. Final payment from the Commodity Credit Corporation was received during January 2014 for tobacco buyout loans held by FCB. As of March 31, 2014, ungraded also includes $122.2 million of loans resulting from the 1st Financial merger.
	Originated loans and leases outstanding at March 31, 2014 and December 31, 2013 by credit quality indicator are provided below:
		March 31, 2014
	(Dollars in thousands)	Originated commercial loans and leases
	Grade:	Construction  and land			Commercial			Other		Commercial  and		Lease financing		Other		Total originated commercial loans and leases
		development			mortgage			commercial real estate		industrial
	Pass	$	323,876		$	6,064,405		$	173,517	$	1,074,210	$	386,324	$	179,640	$	8,201,972
	Special mention	8,442			117,436			1,302		16,777		4,233		10		148,200
	Substandard	2,953			143,723			2,119		6,051		3,155		70		158,071
	Doubtful	—			4,227			—		152		543		5		4,927
	Ungraded	—			1,052			144		78,353		13		—		79,562
	Total	$	335,271		$	6,330,843		$	177,082	$	1,175,543	$	394,268	$	179,725	$	8,592,732
		December 31, 2013
		Originated commercial loans and leases
		Construction  and land			Commercial			Other		Commercial  and		Lease financing		Other		Total originated commercial loans and leases
		development			mortgage			commercial real estate		industrial
	Pass	$	308,231		$	6,094,505		$	174,913	$	964,840	$	375,371	$	174,314	$	8,092,174
	Special mention	8,620			119,515			1,362		14,686		2,160		982		147,325
Substandard	2,944			141,913			2,216		6,352		3,491		40		156,956
Doubtful	52			5,159			75		144		592		—		6,022
Ungraded	—			1,398			188		95,136		149		—		96,871
Total	$	319,847		$	6,362,490		$	178,754	$	1,081,158	$	381,763	$	175,336	$	8,499,348
	March 31, 2014
	Originated noncommercial loans and leases
(Dollars in thousands)	Residential			Revolving			Construction		Consumer		Total originated noncommercial
	mortgage			mortgage			and land				loans
							development
Current	$	1,003,016		$	2,072,832		$	117,161	$	363,259	$	3,556,268
30-59 days past due	16,845			10,578			888		2,156		30,467
60-89 days past due	1,063			3,249			794		1,195		6,301
90 days or greater past due	9,108			4,341			206		803		14,458
Total	$	1,030,032		$	2,091,000		$	119,049	$	367,413	$	3,607,494
	December 31, 2013
	Originated noncommercial loans and leases
	Residential			Revolving			Construction		Consumer		Total originated noncommercial
	mortgage			mortgage			and land				loans
							development
Current	$	955,300		$	2,095,480		$	121,026	$	382,710	$	3,554,516
30-59 days past due	12,885			10,977			1,193		2,114		27,169
60-89 days past due	4,658			2,378			317		955		8,308
90 days or greater past due	9,578			4,450			256		673		14,957
Total	$	982,421		$	2,113,285		$	122,792	$	386,452	$	3,604,950
Acquired loans and leases outstanding at March 31, 2014 and December 31, 2013 by credit quality indicator are provided below:
	March 31, 2014
(Dollars in thousands)	Acquired loans
Grade:	Construction			Commercial			Other		Commercial		Residential		Revolving		Construction		Consumer		Total acquired
	and land			mortgage			commercial		and		mortgage		mortgage		and land		and other		loans
	development -						real estate		industrial						development -
	commercial														noncommercial
Pass	$	14,789		$	375,245		$	28,526	$	29,918	$	131,765	$	20,240	$	32	$	1,387	$	601,902
Special mention	24,065			134,414			114		3,260		4,823		2,649		—		—		169,325
Substandard	58,374			182,540			10,473		4,686		46,044		1,891		1,716		—		305,724
Doubtful	5,101			36,040			8,713		954		1,931		911		295		—		53,945
Ungraded	4,341			633			—		20		106,691		85		26,108		2,044		139,922
Total	$	106,670		$	728,872		$	47,826	$	38,838	$	291,254	$	25,776	$	28,151	$	3,431	$	1,270,818
	December 31, 2013
	Acquired loans
	Construction			Commercial			Other		Commercial		Residential		Revolving		Construction		Consumer		Total acquired
	and land			mortgage			commercial		and		mortgage		mortgage		and land		and other		loans
	development -						real estate		industrial						development -
	commercial														noncommercial
Pass	$	2,619		$	296,824		$	22,225	$	8,021	$	135,326	$	26,322	$	149	$	1,345	$	492,831
Special mention	15,530			125,295			3,431		2,585		6,301		2,608		—		—		155,750
Substandard	52,228			179,657			7,012		5,225		52,774		1,013		2,139		—		300,048
Doubtful	7,436			40,471			8,713		1,257		2,058		891		295		—		61,121
Ungraded	1,102			644			—		166		17,392		—		—		372		19,676
Total	$	78,915		$	642,891		$	41,381	$	17,254	$	213,851	$	30,834	$	2,583	$	1,717	$	1,029,426
The aging of the outstanding loans and leases, by class, at March 31, 2014 and December 31, 2013 (excluding loans and leases acquired with deteriorated credit quality) is provided in the table below.
The calculation of days past due begins on the day after payment is due and includes all days through which all required interest or principal has not been paid. Loans and leases 30 days or less past due are considered current as various grace periods allow borrowers to make payments within a stated period after the due date and still remain in compliance with the loan agreement.
	March 31, 2014
(Dollars in thousands)	30-59 days			60-89 days			90 days or greater		Total past		Current		Total loans
	past due			past due					due				and leases
Originated loans and leases:
Construction and land development - commercial	$	537		$	184		$	655	$	1,376	$	333,895	$	335,271
Commercial mortgage	24,451			3,934			11,248		39,633		6,291,210		6,330,843
Other commercial real estate	155			11			104		270		176,812		177,082
Commercial and industrial	3,921			488			509		4,918		1,170,625		1,175,543
Lease financing	757			323			92		1,172		393,096		394,268
Other	20			5			—		25		179,700		179,725
Residential mortgage	16,845			1,063			9,108		27,016		1,003,016		1,030,032
Revolving mortgage	10,578			3,249			4,341		18,168		2,072,832		2,091,000
Construction and land development - noncommercial	888			794			206		1,888		117,161		119,049
Consumer	2,156			1,195			803		4,154		363,259		367,413
Total originated loans and leases	$	60,308		$	11,246		$	27,066	$	98,620	$	12,101,606	$	12,200,226
	December 31, 2013
	30-59 days			60-89 days			90 days or greater		Total past		Current		Total loans
	past due			past due					due				and leases
Originated loans and leases:
Construction and land development - commercial	$	1,603		$	9		$	457	$	2,069	$	317,778	$	319,847
Commercial mortgage	11,131			3,601			14,407		29,139		6,333,351		6,362,490
Other commercial real estate	139			210			470		819		177,935		178,754
Commercial and industrial	3,336			682			436		4,454		1,076,704		1,081,158
Lease financing	789			1,341			101		2,231		379,532		381,763
Other	—			85			—		85		175,251		175,336
Residential mortgage	12,885			4,658			9,578		27,121		955,300		982,421
Revolving mortgage	10,977			2,378			4,450		17,805		2,095,480		2,113,285
Construction and land development - noncommercial	1,193			317			256		1,766		121,026		122,792
Consumer	2,114			955			673		3,742		382,710		386,452
Total originated loans and leases	$	44,167		$	14,236		$	30,828	$	89,231	$	12,015,067	$	12,104,298
The recorded investment, by class, in loans and leases on nonaccrual status, and loans and leases greater than 90 days past due and still accruing at March 31, 2014 and December 31, 2013 (excluding acquired loans and leases) are as follows:
	March 31, 2014						December 31, 2013
(Dollars in thousands)	Nonaccrual			Loans and			Nonaccrual		Loans and
	loans and			leases > 90			loans and		leases > 90
	leases			days and			leases		days and
				accruing					accruing
Originated loans and leases:
Construction and land development - commercial	$	702		$	192		$	544	$	—
Other commercial real estate	1,459			—			1,610		—
Commercial mortgage	28,910			927			33,529		1,113
Commercial and industrial	1,075			393			1,428		294
Lease financing	689			—			832		—
Residential mortgage	14,091			2,609			14,701		1,998
Revolving mortgage	—			4,341			—		4,450
Construction and land development - noncommercial	—			206			457		256
Consumer	26			803			69		673
Total originated loans and leases	$	46,952		$	9,471		$	53,170	$	8,784
Acquired Loans
The following table provides changes in the recorded investment of acquired loans during the three months ended March 31, 2014 and March 31, 2013:
(Dollars in thousands)	2014			2013
Balance at January 1	$	1,029,426		$	2,362,152
Fair value of acquired loans	316,327			—
Accretion	30,200			79,886
Payments received and other changes, net	(105,135		)	(258,169		)
Balance at March 31	$	1,270,818		$	2,183,869
Outstanding principal balance at March 31	$	1,727,492		$	3,618,722
The recorded investment of loans on the cost recovery method was $52.1 million at March 31, 2014 and $28.5 million at December 31, 2013. This increase is primarily driven by one large acquired loan relationship that was moved to cost recovery during the quarter. The cost recovery method is applied to loans when the timing of future cash flows is not reasonably estimable due to borrower nonperformance or uncertainty in the timing and amount of ultimate disposition of the asset.
The following table documents changes to the amount of accretable yield for the first three months of 2014 and 2013.
(Dollars in thousands)	2014			2013
Balance at January 1	$	439,990		$	539,564
Additions	84,295			—
Accretion	(30,200		)	(79,886		)
Reclassifications from (to) nonaccretable difference	6,048			(11,653		)
Changes in expected cash flows that do not affect nonaccretable difference	(9,888		)	37,910
Balance at March 31	$	490,245		$	485,935
Loans And Leases Outstanding	'
	Loans and leases outstanding, by class, include the following as of the dates indicated:
	(Dollars in thousands)	March 31, 2014			December 31, 2013
	Acquired loans
	Commercial:
	Construction and land development	$	106,670		$	78,915
	Commercial mortgage	728,872			642,891
	Other commercial real estate	47,826			41,381
	Commercial and industrial	38,838			17,254
	Other	870			866
	Total commercial loans	923,076			781,307
	Noncommercial:
	Residential mortgage	291,254			213,851
	Revolving mortgage	25,776			30,834
	Construction and land development	28,151			2,583
	Consumer	2,561			851
	Total noncommercial loans	347,742			248,119
	Total acquired loans	1,270,818			1,029,426
	Originated loans and leases:
	Commercial:
	Construction and land development	335,271			319,847
	Commercial mortgage	6,330,843			6,362,490
	Other commercial real estate	177,082			178,754
	Commercial and industrial	1,175,543			1,081,158
	Lease financing	394,268			381,763
	Other	179,725			175,336
	Total commercial loans	8,592,732			8,499,348
	Noncommercial:
	Residential mortgage	1,030,032			982,421
	Revolving mortgage	2,091,000			2,113,285
	Construction and land development	119,049			122,792
	Consumer	367,413			386,452
	Total noncommercial loans	3,607,494			3,604,950
	Total originated loans and leases	12,200,226			12,104,298
	Total loans and leases	$	13,471,044		$	13,133,724
Composition Of The Loans And Leases Outstanding By Credit Quality Indicator	'
	Originated loans and leases outstanding at March 31, 2014 and December 31, 2013 by credit quality indicator are provided below:
		March 31, 2014
	(Dollars in thousands)	Originated commercial loans and leases
	Grade:	Construction  and land			Commercial			Other		Commercial  and		Lease financing		Other		Total originated commercial loans and leases
		development			mortgage			commercial real estate		industrial
	Pass	$	323,876		$	6,064,405		$	173,517	$	1,074,210	$	386,324	$	179,640	$	8,201,972
	Special mention	8,442			117,436			1,302		16,777		4,233		10		148,200
	Substandard	2,953			143,723			2,119		6,051		3,155		70		158,071
	Doubtful	—			4,227			—		152		543		5		4,927
	Ungraded	—			1,052			144		78,353		13		—		79,562
	Total	$	335,271		$	6,330,843		$	177,082	$	1,175,543	$	394,268	$	179,725	$	8,592,732
		December 31, 2013
		Originated commercial loans and leases
		Construction  and land			Commercial			Other		Commercial  and		Lease financing		Other		Total originated commercial loans and leases
		development			mortgage			commercial real estate		industrial
	Pass	$	308,231		$	6,094,505		$	174,913	$	964,840	$	375,371	$	174,314	$	8,092,174
	Special mention	8,620			119,515			1,362		14,686		2,160		982		147,325
	Substandard	2,944			141,913			2,216		6,352		3,491		40		156,956
	Doubtful	52			5,159			75		144		592		—		6,022
	Ungraded	—			1,398			188		95,136		149		—		96,871
	Total	$	319,847		$	6,362,490		$	178,754	$	1,081,158	$	381,763	$	175,336	$	8,499,348
		March 31, 2014
		Originated noncommercial loans and leases
	(Dollars in thousands)	Residential			Revolving			Construction		Consumer		Total originated noncommercial
		mortgage			mortgage			and land				loans
								development
	Current	$	1,003,016		$	2,072,832		$	117,161	$	363,259	$	3,556,268
	30-59 days past due	16,845			10,578			888		2,156		30,467
	60-89 days past due	1,063			3,249			794		1,195		6,301
	90 days or greater past due	9,108			4,341			206		803		14,458
	Total	$	1,030,032		$	2,091,000		$	119,049	$	367,413	$	3,607,494
		December 31, 2013
		Originated noncommercial loans and leases
		Residential			Revolving			Construction		Consumer		Total originated noncommercial
		mortgage			mortgage			and land				loans
								development
	Current	$	955,300		$	2,095,480		$	121,026	$	382,710	$	3,554,516
	30-59 days past due	12,885			10,977			1,193		2,114		27,169
	60-89 days past due	4,658			2,378			317		955		8,308
	90 days or greater past due	9,578			4,450			256		673		14,957
	Total	$	982,421		$	2,113,285		$	122,792	$	386,452	$	3,604,950
	Acquired loans and leases outstanding at March 31, 2014 and December 31, 2013 by credit quality indicator are provided below:
		March 31, 2014
	(Dollars in thousands)	Acquired loans
	Grade:	Construction			Commercial			Other		Commercial		Residential		Revolving		Construction		Consumer		Total acquired
		and land			mortgage			commercial		and		mortgage		mortgage		and land		and other		loans
		development -						real estate		industrial						development -
		commercial														noncommercial
	Pass	$	14,789		$	375,245		$	28,526	$	29,918	$	131,765	$	20,240	$	32	$	1,387	$	601,902
	Special mention	24,065			134,414			114		3,260		4,823		2,649		—		—		169,325
	Substandard	58,374			182,540			10,473		4,686		46,044		1,891		1,716		—		305,724
	Doubtful	5,101			36,040			8,713		954		1,931		911		295		—		53,945
	Ungraded	4,341			633			—		20		106,691		85		26,108		2,044		139,922
	Total	$	106,670		$	728,872		$	47,826	$	38,838	$	291,254	$	25,776	$	28,151	$	3,431	$	1,270,818
		December 31, 2013
		Acquired loans
		Construction			Commercial			Other		Commercial		Residential		Revolving		Construction		Consumer		Total acquired
		and land			mortgage			commercial		and		mortgage		mortgage		and land		and other		loans
		development -						real estate		industrial						development -
		commercial														noncommercial
	Pass	$	2,619		$	296,824		$	22,225	$	8,021	$	135,326	$	26,322	$	149	$	1,345	$	492,831
	Special mention	15,530			125,295			3,431		2,585		6,301		2,608		—		—		155,750
	Substandard	52,228			179,657			7,012		5,225		52,774		1,013		2,139		—		300,048
Doubtful	7,436			40,471			8,713		1,257		2,058		891		295		—		61,121
Ungraded	1,102			644			—		166		17,392		—		—		372		19,676
Total	$	78,915		$	642,891		$	41,381	$	17,254	$	213,851	$	30,834	$	2,583	$	1,717	$	1,029,426
Aging Of The Outstanding Loans And Leases By Class Excluding Loans Impaired At Acquisition Date	'
	The aging of the outstanding loans and leases, by class, at March 31, 2014 and December 31, 2013 (excluding loans and leases acquired with deteriorated credit quality) is provided in the table below.
	The calculation of days past due begins on the day after payment is due and includes all days through which all required interest or principal has not been paid. Loans and leases 30 days or less past due are considered current as various grace periods allow borrowers to make payments within a stated period after the due date and still remain in compliance with the loan agreement.
		March 31, 2014
	(Dollars in thousands)	30-59 days			60-89 days			90 days or greater		Total past		Current		Total loans
		past due			past due					due				and leases
	Originated loans and leases:
	Construction and land development - commercial	$	537		$	184		$	655	$	1,376	$	333,895	$	335,271
	Commercial mortgage	24,451			3,934			11,248		39,633		6,291,210		6,330,843
	Other commercial real estate	155			11			104		270		176,812		177,082
	Commercial and industrial	3,921			488			509		4,918		1,170,625		1,175,543
	Lease financing	757			323			92		1,172		393,096		394,268
	Other	20			5			—		25		179,700		179,725
	Residential mortgage	16,845			1,063			9,108		27,016		1,003,016		1,030,032
	Revolving mortgage	10,578			3,249			4,341		18,168		2,072,832		2,091,000
	Construction and land development - noncommercial	888			794			206		1,888		117,161		119,049
	Consumer	2,156			1,195			803		4,154		363,259		367,413
	Total originated loans and leases	$	60,308		$	11,246		$	27,066	$	98,620	$	12,101,606	$	12,200,226
		December 31, 2013
		30-59 days			60-89 days			90 days or greater		Total past		Current		Total loans
		past due			past due					due				and leases
	Originated loans and leases:
	Construction and land development - commercial	$	1,603		$	9		$	457	$	2,069	$	317,778	$	319,847
	Commercial mortgage	11,131			3,601			14,407		29,139		6,333,351		6,362,490
	Other commercial real estate	139			210			470		819		177,935		178,754
	Commercial and industrial	3,336			682			436		4,454		1,076,704		1,081,158
	Lease financing	789			1,341			101		2,231		379,532		381,763
	Other	—			85			—		85		175,251		175,336
	Residential mortgage	12,885			4,658			9,578		27,121		955,300		982,421
	Revolving mortgage	10,977			2,378			4,450		17,805		2,095,480		2,113,285
	Construction and land development - noncommercial	1,193			317			256		1,766		121,026		122,792
	Consumer	2,114			955			673		3,742		382,710		386,452
	Total originated loans and leases	$	44,167		$	14,236		$	30,828	$	89,231	$	12,015,067	$	12,104,298
Recorded Investment, By Class, In Loans And Leases On Nonaccrual Status And Loans And Leases Greater Than 90 Days Past Due And Still Accruing	'
	The recorded investment, by class, in loans and leases on nonaccrual status, and loans and leases greater than 90 days past due and still accruing at March 31, 2014 and December 31, 2013 (excluding acquired loans and leases) are as follows:
		March 31, 2014						December 31, 2013
	(Dollars in thousands)	Nonaccrual			Loans and			Nonaccrual		Loans and
		loans and			leases > 90			loans and		leases > 90
		leases			days and			leases		days and
					accruing					accruing
	Originated loans and leases:
	Construction and land development - commercial	$	702		$	192		$	544	$	—
	Other commercial real estate	1,459			—			1,610		—
	Commercial mortgage	28,910			927			33,529		1,113
	Commercial and industrial	1,075			393			1,428		294
	Lease financing	689			—			832		—
	Residential mortgage	14,091			2,609			14,701		1,998
	Revolving mortgage	—			4,341			—		4,450
	Construction and land development - noncommercial	—			206			457		256
	Consumer	26			803			69		673
	Total originated loans and leases	$	46,952		$	9,471		$	53,170	$	8,784
Changes In Carrying Value Of Acquired Impaired Loans	'
	The following table provides changes in the recorded investment of acquired loans during the three months ended March 31, 2014 and March 31, 2013:
	(Dollars in thousands)	2014			2013
	Balance at January 1	$	1,029,426		$	2,362,152
	Fair value of acquired loans	316,327			—
	Accretion	30,200			79,886
	Payments received and other changes, net	(105,135		)	(258,169		)
	Balance at March 31	$	1,270,818		$	2,183,869
	Outstanding principal balance at March 31	$	1,727,492		$	3,618,722
Changes In The Amount Of Accretable Yield	'
	For loans acquired from 1st Financial, the contractually required payments including principal and interest, cash flows expected to be collected and fair values as of the merger date were:
	(Dollars in thousands)	January 1, 2014
	Contractually required payments	$	414,233
	Cash flows expected to be collected	400,622
	Fair value at acquisition date	316,327
	The following table documents changes to the amount of accretable yield for the first three months of 2014 and 2013.
	(Dollars in thousands)	2014			2013
	Balance at January 1	$	439,990		$	539,564
	Additions	84,295			—
	Accretion	(30,200		)	(79,886		)
	Reclassifications from (to) nonaccretable difference	6,048			(11,653		)
	Changes in expected cash flows that do not affect nonaccretable difference	(9,888		)	37,910
	Balance at March 31	$	490,245		$	485,935

Allowance_for_Loan_and_Lease_L1

Allowance for Loan and Lease Losses (Tables)	3 Months Ended
	Mar. 31, 2014
Allowance for Loan and Lease Losses, Adjustments, Net [Abstract]	'
Allocation of Allowance for Loan and Lease Losses [Table Text Block]	'
		Three months ended March 31, 2014
	(Dollars in thousands)	Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Non-			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land						specific
		development							real estate																				development
		- commercial																											- non-
																													commercial
	Originated Loans
	Allowance for loan and lease losses:
	Balance at January 1	$	10,335		$	100,257			$	1,009			$	22,362			$	4,749		$	190		$	10,511		$	16,239		$	681		$	13,541		$	—		$	179,874
	Provision	1,885			(6,979		)		(74		)		1,976				(524		)	272			609			1,353			577			1,275			—			370
	Charge-offs	—			(168		)		—				(496		)		(58		)	(8		)	(184		)	(1,260		)	(71		)	(2,177		)	—			(4,422		)
	Recoveries	26			1,107				10				179				16			—			8			76			62			643			—			2,127
	Balance at March 31	$	12,246		$	94,217			$	945			$	24,021			$	4,183		$	454		$	10,944		$	16,408		$	1,249		$	13,282		$	—		$	177,949
		Three months ended March 31, 2013
		Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Non-			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land						specific
		development							real estate																				development
		- commercial																											- non-
																													commercial
	Balance at January 1	$	6,031		$	70,927			$	2,059			$	23,352			$	3,521		$	1,175		$	3,836		$	25,185		$	1,721		$	25,389		$	15,850		$	179,046
	Provision	(1,834		)	2,536				(100		)		500				22			315			733			1,431			(113		)	604			(78		)	4,016
	Charge-offs	(254		)	(654		)		(54		)		(1,258		)		—			—			(818		)	(2,188		)	(245		)	(2,596		)	—			(8,067		)
	Recoveries	368			8				10				369				—			—			39			71			56			630			—			1,551
	Balance at March 31	$	4,311		$	72,817			$	1,915			$	22,963			$	3,543		$	1,490		$	3,790		$	24,499		$	1,419		$	24,027		$	15,772		$	176,546
	The provision for construction and land development - commercial totaled $1.9 million for the three months ended March 31, 2014. The March 31, 2014 provision expense was a direct result of increased loans during the quarter. Conversely, the March 31, 2013 credit provision resulted from a decline in the outstanding loan balances as well as the resolution of several individually impaired loans.
	The commercial mortgage loan class had a net credit provision of $7.0 million for the three months ended March 31, 2014. The net credit provision was the result of declining loan balances, improvements in the credit risk rating mix and lower credit default trends within this loan class. Conversely, the March 31, 2013 provision expense was impacted by increased loan balances.
	The commercial and industrial loan class had a provision expense of $2.0 million for the three months ended March 31, 2014 reflecting $94.4 million in loan growth for the quarter.
	The following tables present the allowance for originated loan losses and the recorded investment in originated loans, by loan class, based on impairment method as of March 31, 2014 and December 31, 2013:
		March 31, 2014
	(Dollars in thousands)	Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land
		development							real estate																				development
		- commercial																											- non-commercial
	Allowance for loan and lease losses:
	ALLL for loans and leases individually evaluated for impairment	$	144		$	6,400			$	203			$	769			$	13		$	—		$	1,418		$	353		$	77		$	118		$	9,495
	ALLL for loans and leases collectively evaluated for impairment	12,102			87,817				742				23,252				4,170			454			9,526			16,055			1,172			13,164			168,454
	Total allowance for loan and lease losses	$	12,246		$	94,217			$	945			$	24,021			$	4,183		$	454		$	10,944		$	16,408		$	1,249		$	13,282		$	177,949
	Loans and leases:
	Loans and leases individually evaluated for impairment	$	2,329		$	88,987			$	1,627			$	8,804			$	393		$	—		$	15,626		$	3,587		$	699		$	1,015		$	123,067
	Loans and leases collectively evaluated for impairment	332,942			6,241,856				175,455				1,166,739				393,875			179,725			1,014,406			2,087,413			118,350			366,398			12,077,159
	Total loan and leases	$	335,271		$	6,330,843			$	177,082			$	1,175,543			$	394,268		$	179,725		$	1,030,032		$	2,091,000		$	119,049		$	367,413		$	12,200,226
		December 31, 2013
		Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land
		development							real estate																				development
		- commercial																											- non-commercial
	ALLL for loans and leases individually evaluated for impairment	$	103		$	6,873			$	209			$	771			$	54		$	—		$	1,586		$	372		$	72		$	121		$	10,161
	ALLL for loans and leases collectively evaluated for impairment	10,232			93,384				800				21,591				4,695			190			8,925			15,867			609			13,420			169,713
	Total allowance for loan and lease losses	$	10,335		$	100,257			$	1,009			$	22,362			$	4,749		$	190		$	10,511		$	16,239		$	681		$	13,541		$	179,874
	Loans and leases individually evaluated for impairment	$	2,272		$	97,111			$	1,878			$	9,300			$	188		$	—		$	15,539		$	3,596		$	1,108		$	1,154		$	132,146
	Loans and leases collectively evaluated for impairment	317,575			6,265,379				176,876				1,071,858				381,575			175,336			966,882			2,109,689			121,684			385,298			11,972,152
	Total loan and leases	$	319,847		$	6,362,490			$	178,754			$	1,081,158			$	381,763		$	175,336		$	982,421		$	2,113,285		$	122,792		$	386,452		$	12,104,298
	The following tables show the activity in the allowance for acquired loan and lease losses for the three months ended March 31, 2014 and March 31, 2013.
		Three months ended March 31, 2014
	(Dollars in thousands)	Construction			Commercial				Other				Commercial				Residential			Revolving			Construction			Consumer			Total
		and land			mortgage				commercial				and				mortgage			mortgage			and land			and other
		development -							real estate				industrial										development -
		commercial																					noncommercial
	Acquired Loans
	Allowance for loan and lease losses:
	Balance at January 1	$	1,320		$	29,906			$	1,354			$	5,275			$	11,802		$	2,959		$	682		$	222		$	53,520
	Provision	3,355			(3,386		)		(150		)		(336		)		(2,300		)	634			(99		)	9			(2,273		)
	Charge-offs	(199		)	(3,517		)		—				(2,683		)		262			(100		)	—			(17		)	(6,254		)
Recoveries	—			—				—				—				—			—			—			—			—
Balance at March 31	$	4,476		$	23,003			$	1,204			$	2,256			$	9,764		$	3,493		$	583		$	214		$	44,993
	Three months ended March 31, 2013
	Construction			Commercial				Other				Commercial				Residential			Revolving			Construction			Consumer			Total
	and land			mortgage				commercial				and				mortgage			mortgage			and land			and other
	development -							real estate				industrial										development -
	commercial																					noncommercial
Balance at January 1	$	31,186		$	50,275			$	11,234			$	8,897			$	19,837		$	9,754		$	8,287		$	502		$	139,972
Provision	(13,147		)	(2,084		)		(5,131		)		4,233				(1,505		)	(2,505		)	(2,313		)	(170		)	(22,622		)
Charge-offs	(4,733		)	(9,898		)		(931		)		(1,254		)		(729		)	(114		)	(3,218		)	—			(20,877		)
Recoveries	—			—				—				—				—			—			—			—			—
Balance at March 31	$	13,306		$	38,293			$	5,172			$	11,876			$	17,603		$	7,135		$	2,756		$	332		$	96,473
Allowance for Loan and Lease Losses	'
	Allowance for Loan and Lease Losses
	The following tables present the activity in the allowance for originated loan and lease losses by class of loans for the three months ended March 31, 2014 and March 31, 2013:
		Three months ended March 31, 2014
	(Dollars in thousands)	Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Non-			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land						specific
		development							real estate																				development
		- commercial																											- non-
																													commercial
	Originated Loans
	Allowance for loan and lease losses:
	Balance at January 1	$	10,335		$	100,257			$	1,009			$	22,362			$	4,749		$	190		$	10,511		$	16,239		$	681		$	13,541		$	—		$	179,874
	Provision	1,885			(6,979		)		(74		)		1,976				(524		)	272			609			1,353			577			1,275			—			370
	Charge-offs	—			(168		)		—				(496		)		(58		)	(8		)	(184		)	(1,260		)	(71		)	(2,177		)	—			(4,422		)
	Recoveries	26			1,107				10				179				16			—			8			76			62			643			—			2,127
	Balance at March 31	$	12,246		$	94,217			$	945			$	24,021			$	4,183		$	454		$	10,944		$	16,408		$	1,249		$	13,282		$	—		$	177,949
		Three months ended March 31, 2013
		Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Non-			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land						specific
		development							real estate																				development
		- commercial																											- non-
																													commercial
	Balance at January 1	$	6,031		$	70,927			$	2,059			$	23,352			$	3,521		$	1,175		$	3,836		$	25,185		$	1,721		$	25,389		$	15,850		$	179,046
	Provision	(1,834		)	2,536				(100		)		500				22			315			733			1,431			(113		)	604			(78		)	4,016
	Charge-offs	(254		)	(654		)		(54		)		(1,258		)		—			—			(818		)	(2,188		)	(245		)	(2,596		)	—			(8,067		)
	Recoveries	368			8				10				369				—			—			39			71			56			630			—			1,551
	Balance at March 31	$	4,311		$	72,817			$	1,915			$	22,963			$	3,543		$	1,490		$	3,790		$	24,499		$	1,419		$	24,027		$	15,772		$	176,546
	The provision for construction and land development - commercial totaled $1.9 million for the three months ended March 31, 2014. The March 31, 2014 provision expense was a direct result of increased loans during the quarter. Conversely, the March 31, 2013 credit provision resulted from a decline in the outstanding loan balances as well as the resolution of several individually impaired loans.
	The commercial mortgage loan class had a net credit provision of $7.0 million for the three months ended March 31, 2014. The net credit provision was the result of declining loan balances, improvements in the credit risk rating mix and lower credit default trends within this loan class. Conversely, the March 31, 2013 provision expense was impacted by increased loan balances.
	The commercial and industrial loan class had a provision expense of $2.0 million for the three months ended March 31, 2014 reflecting $94.4 million in loan growth for the quarter.
	The following tables present the allowance for originated loan losses and the recorded investment in originated loans, by loan class, based on impairment method as of March 31, 2014 and December 31, 2013:
		March 31, 2014
	(Dollars in thousands)	Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land
		development							real estate																				development
		- commercial																											- non-commercial
	Allowance for loan and lease losses:
	ALLL for loans and leases individually evaluated for impairment	$	144		$	6,400			$	203			$	769			$	13		$	—		$	1,418		$	353		$	77		$	118		$	9,495
	ALLL for loans and leases collectively evaluated for impairment	12,102			87,817				742				23,252				4,170			454			9,526			16,055			1,172			13,164			168,454
	Total allowance for loan and lease losses	$	12,246		$	94,217			$	945			$	24,021			$	4,183		$	454		$	10,944		$	16,408		$	1,249		$	13,282		$	177,949
	Loans and leases:
	Loans and leases individually evaluated for impairment	$	2,329		$	88,987			$	1,627			$	8,804			$	393		$	—		$	15,626		$	3,587		$	699		$	1,015		$	123,067
	Loans and leases collectively evaluated for impairment	332,942			6,241,856				175,455				1,166,739				393,875			179,725			1,014,406			2,087,413			118,350			366,398			12,077,159
	Total loan and leases	$	335,271		$	6,330,843			$	177,082			$	1,175,543			$	394,268		$	179,725		$	1,030,032		$	2,091,000		$	119,049		$	367,413		$	12,200,226
		December 31, 2013
		Construction			Commercial				Other				Commercial				Lease			Other			Residential			Revolving			Construction			Consumer			Total
		and land			mortgage				commercial				and industrial				financing						mortgage			mortgage			and land
		development							real estate																				development
		- commercial																											- non-commercial
	ALLL for loans and leases individually evaluated for impairment	$	103		$	6,873			$	209			$	771			$	54		$	—		$	1,586		$	372		$	72		$	121		$	10,161
	ALLL for loans and leases collectively evaluated for impairment	10,232			93,384				800				21,591				4,695			190			8,925			15,867			609			13,420			169,713
	Total allowance for loan and lease losses	$	10,335		$	100,257			$	1,009			$	22,362			$	4,749		$	190		$	10,511		$	16,239		$	681		$	13,541		$	179,874
	Loans and leases individually evaluated for impairment	$	2,272		$	97,111			$	1,878			$	9,300			$	188		$	—		$	15,539		$	3,596		$	1,108		$	1,154		$	132,146
	Loans and leases collectively evaluated for impairment	317,575			6,265,379				176,876				1,071,858				381,575			175,336			966,882			2,109,689			121,684			385,298			11,972,152
	Total loan and leases	$	319,847		$	6,362,490			$	178,754			$	1,081,158			$	381,763		$	175,336		$	982,421		$	2,113,285		$	122,792		$	386,452		$	12,104,298
	The following tables show the activity in the allowance for acquired loan and lease losses for the three months ended March 31, 2014 and March 31, 2013.
		Three months ended March 31, 2014
	(Dollars in thousands)	Construction			Commercial				Other				Commercial				Residential			Revolving			Construction			Consumer			Total
		and land			mortgage				commercial				and				mortgage			mortgage			and land			and other
		development -							real estate				industrial										development -
		commercial																					noncommercial
	Acquired Loans
	Allowance for loan and lease losses:
	Balance at January 1	$	1,320		$	29,906			$	1,354			$	5,275			$	11,802		$	2,959		$	682		$	222		$	53,520
Provision	3,355			(3,386		)		(150		)		(336		)		(2,300		)	634			(99		)	9			(2,273		)
Charge-offs	(199		)	(3,517		)		—				(2,683		)		262			(100		)	—			(17		)	(6,254		)
Recoveries	—			—				—				—				—			—			—			—			—
Balance at March 31	$	4,476		$	23,003			$	1,204			$	2,256			$	9,764		$	3,493		$	583		$	214		$	44,993
	Three months ended March 31, 2013
	Construction			Commercial				Other				Commercial				Residential			Revolving			Construction			Consumer			Total
	and land			mortgage				commercial				and				mortgage			mortgage			and land			and other
	development -							real estate				industrial										development -
	commercial																					noncommercial
Balance at January 1	$	31,186		$	50,275			$	11,234			$	8,897			$	19,837		$	9,754		$	8,287		$	502		$	139,972
Provision	(13,147		)	(2,084		)		(5,131		)		4,233				(1,505		)	(2,505		)	(2,313		)	(170		)	(22,622		)
Charge-offs	(4,733		)	(9,898		)		(931		)		(1,254		)		(729		)	(114		)	(3,218		)	—			(20,877		)
Recoveries	—			—				—				—				—			—			—			—			—
Balance at March 31	$	13,306		$	38,293			$	5,172			$	11,876			$	17,603		$	7,135		$	2,756		$	332		$	96,473
The following tables show the ending balances of acquired loans and leases and related allowance by class of loans as of March 31, 2014 and December 31, 2013:
	March 31, 2014
	Construction			Commercial				Other				Commercial				Residential			Revolving			Construction			Consumer			Total
	and land			mortgage				commercial				and				mortgage			mortgage			and land			and other
	development -							real estate				industrial										development -
	commercial																					noncommercial
ALLL for loans and leases acquired with deteriorated credit quality	$	4,476		$	23,003			$	1,204			$	2,256			$	9,764		$	3,493		$	583		$	214		$	44,993
Loans and leases acquired with deteriorated credit quality	106,670			728,872				47,826				38,838				291,254			25,776			28,151			3,431			1,270,818
	December 31, 2013
	Construction			Commercial				Other				Commercial				Residential			Revolving			Construction			Consumer			Total
	and land			mortgage				commercial				and				mortgage			mortgage			and land			and other
	development -							real estate				industrial										development -
	commercial																					noncommercial
ALLL for loans and leases acquired with deteriorated credit quality	$	1,320		$	29,906			$	1,354			$	5,275			$	11,802		$	2,959		$	682		$	222		$	53,520
Loans and leases acquired with deteriorated credit quality	78,915			642,891				41,381				17,254				213,851			30,834			2,583			1,717			1,029,426
At March 31, 2014 and December 31, 2013, $382.6 million and $459.9 million, respectively, in acquired loans experienced an adverse change in expected cash flows since the date of acquisition.
The following tables provide information on originated loans and leases that are individually evaluated for impairment as of March 31, 2014 and December 31, 2013.
	March 31, 2014
(Dollars in thousands)	With a			With no				Total				Unpaid				Related
	recorded			recorded								principal				allowance
	allowance			allowance								balance				recorded
Impaired originated loans and leases
Construction and land development - commercial	$	1,646		$	683			$	2,329			$	3,294			$	144
Commercial mortgage	57,568			31,419				88,987				94,950				6,400
Other commercial real estate	755			872				1,627				2,027				203
Commercial and industrial	6,530			2,274				8,804				10,055				769
Lease financing	238			155				393				393				13
Residential mortgage	10,624			5,002				15,626				16,026				1,418
Revolving mortgage	3,210			377				3,587				4,618				353
Construction and land development - noncommercial	699			—				699				699				77
Consumer	1,015			—				1,015				1,039				118
Total impaired originated loans and leases	$	82,285		$	40,782			$	123,067			$	133,101			$	9,495
	December 31, 2013
	With a			With no				Total				Unpaid				Related
	recorded			recorded								principal				allowance
	allowance			allowance								balance				recorded
Impaired originated loans and leases
Construction and land development - commercial	$	1,025		$	1,247			$	2,272			$	7,306			$	103
Commercial mortgage	57,819			39,292				97,111				103,522				6,873
Other commercial real estate	783			1,095				1,878				2,279				209
Commercial and industrial	7,197			2,103				9,300				10,393				771
Lease financing	133			55				188				188				54
Residential mortgage	11,534			4,005				15,539				15,939				1,586
Revolving mortgage	3,382			214				3,596				3,596				372
Construction and land development - noncommercial	651			457				1,108				1,108				72
Consumer	1,154			—				1,154				1,154				121
Total impaired originated loans and leases	$	83,678		$	48,468			$	132,146			$	145,485			$	10,161
The following tables show the average impaired originated loan balance and the interest income recognized by loan class for the three months ended March 31, 2014 and March 31, 2013:
	Three months ended March 31, 2014
(Dollars in thousands)	Average			Interest income recognized
	balance
Impaired originated loans and leases:
Construction and land development - commercial	$	1,031		$	15
Commercial mortgage	94,547			1,120
Other commercial real estate	1,796			21
Commercial and industrial	10,234			118
Lease financing	284			4
Residential mortgage	16,482			174
Revolving mortgage	3,892			27
Construction and land development - noncommercial	2,322			29
Consumer	1,059			5
Total impaired originated loans and leases	$	131,647		$	1,513
	Three months ended March 31, 2013
	Average			Interest income recognized
	balance
Impaired originated loans and leases:
Construction and land development - commercial	$	9,284		$	112
Commercial mortgage	103,848			1,425
Other commercial real estate	3,179			45
Commercial and industrial	18,997			266
Lease financing	355			6
Residential mortgage	17,330			228
Revolving mortgage	5,472			25
Construction and land development - noncommercial	866			11
Consumer	1,683			5
Total impaired originated loans and leases	$	161,014		$	2,123
Troubled Debt Restructurings
BancShares accounts for certain loan modifications or restructurings as troubled debt restructurings (TDRs). In general, the modification or restructuring of a loan is considered a TDR if, for economic reasons or legal reasons related to a borrower's financial difficulties, a concession is granted to the borrower that creditors would not otherwise grant. Concessions may relate to the contractual interest rate, maturity date, payment structure or other actions. In accordance with GAAP, loans acquired under ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality, are not initially considered to be TDRs, but can be classified as such if a modification is made subsequent to acquisition. Modifications of acquired loans that are part of a pool are not designated as TDRs. The following table provides a summary of total TDRs by accrual status.
	March 31, 2014											December 31, 2013
(Dollars in thousands)	Accruing			Nonaccruing				Total				Accruing				Nonaccruing			Total
Commercial loans
Construction and land development - commercial	$	20,791		$	1,002			$	21,793			$	21,032			$	1,002		$	22,034
Commercial mortgage	136,563			25,276				161,839				113,323				23,387			136,710
Other commercial real estate	3,308			933				4,241				3,470				1,150			4,620
Commercial and industrial	8,929			1,180				10,109				9,838				1,142			10,980
Lease	247			146				393				49				—			49
Total commercial TDRs	169,838			28,537				198,375				147,712				26,681			174,393
Noncommercial
Residential	23,519			3,806				27,325				23,343				3,663			27,006
Revolving mortgage	3,587			—				3,587				3,095				—			3,095
Construction and land development - noncommercial	699			—				699				651				457			1,108
Consumer and other	1,015			—				1,015				1,154				—			1,154
Total noncommercial TDRs	28,820			3,806				32,626				28,243				4,120			32,363
Total TDRs	$	198,658		$	32,343			$	231,001			$	175,955			$	30,801		$	206,756
The following table shows the accrual status of acquired and originated TDRs.
(Dollars in thousands)	March 31, 2014			December 31, 2013
Accruing TDRs:
Acquired	$	105,642		$	90,829
Originated	93,016			85,126
Total accruing TDRs	198,658			175,955
Nonaccruing TDRs:
Acquired	11,626			11,479
Originated	20,717			19,322
Total nonaccruing TDRs	32,343			30,801
All TDRs:
Acquired	117,268			102,308
Originated	113,733			104,448
Total TDRs	$	231,001		$	206,756
All TDRs are impaired loans. TDRs are, therefore, individually evaluated for impairment on a quarterly basis or more frequently as needed. Impairment is evaluated using one of three approved valuation methodologies: discounted cash flows, market prices or collateral values. Based on the accrual status and credit grade, management determines the most appropriate method to reasonably assess expectations for recovery of the investment. The discounted cash flow method, the collateral value method or a combination of the two aforementioned methods is used internally for TDR impairment analysis. Expected cash flows are discounted at the loan’s original effective interest rate.
Specific valuation allowances are established or partial charge-offs are recorded on TDRs in the amount equal to the difference between the estimated fair value and the loan amount.
The majority of TDRs are included in the special mention, substandard or doubtful grading categories. When a restructured loan subsequently defaults, it is evaluated and downgraded if appropriate. The more severely graded the loan, the lower the estimated expected cash flows and the greater the allowance recorded.
The following tables provide the types of TDRs made during the three months ended March 31, 2014 and March 31, 2013 for originated loans, as well as a summary of originated loans that were modified as a TDR during the 12 months ended March 31, 2014 and March 31, 2013 that subsequently defaulted during the three months ended March 31, 2014 and March 31, 2013. BancShares defines payment default as movement of the TDR to nonaccrual status, which is generally 30 days past due for TDRs, foreclosure or charge-off, whichever occurs first.
.
	Three months ended March 31, 2014									Three months ended March 31, 2013
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
(Dollars in thousands)	Number of Loans	Recorded investment at period end			Number of Loans	Recorded investment at period end				Number of Loans	Recorded investment at period end				Number of Loans	Recorded investment at period end
Originated loans
Interest only period provided
Commercial mortgage	4	$	1,911		2	$	410			1	$	356			—	$	—
Commercial and industrial	1	196			—	—				—	—				—	—
Lease financing	2	146			—	—				—	—				—	—
Total interest only	7	2,253			2	410				1	356				—	—
Loan term extension
Commercial mortgage	5	2,620			—	—				6	2,117				1	483
Commercial and industrial	—	—			—	—				1	186				—	—
Lease financing	2	234			—	—				—	—				—	—
Residential mortgage	5	338			—	—				4	683				—	—
Consumer	—	—			1	41				—	—				—	—
Total loan term extension	12	3,192			1	41				11	2,986				1	483
Below market interest rate
Construction and land development - commercial	1	82			—	—				—	—				—	—
Commercial mortgage	12	4,677			1	449				3	2,556				1	1,024
Commercial and industrial	2	110			—	—				1	17				1	116
Residential mortgage	8	451			3	127				5	675				—	—
Revolving mortgage	5	278			—	—				—	—				—	—
Consumer	—	—			—	—				5	1,490				—	—
Total below market interest rate	28	5,598			4	576				14	4,738				2	1,140
Discharged from bankruptcy
Commercial mortgage	1	1,003			—	—				—	—				—	—
Residential mortgage	7	708			2	288				2	299				—	—
Revolving mortgage	4	229			—	—				24	1,878				5	233
Construction and land development-noncommercial	1	62			—	—				—	—				—	—
Consumer	1	18			—	—				—	—				—	—
Total discharged from bankruptcy	14	2,020			2	288				26	2,177				5	233
Total originated restructurings	61	$	13,063		9	$	1,315			52	$	10,257			8	$	1,856
The following tables provide the types of TDRs made during the three months ended March 31, 2014 and March 31, 2013 for acquired loans, as well as a summary of acquired loans that were modified as a TDR during the 12 months ended March 31, 2014 and March 31, 2013 that subsequently defaulted during the three months ended March 31, 2014 and March 31, 2013. BancShares defines payment default as movement of the TDR to nonaccrual status, which is generally 30 days past due for TDRs, foreclosure or charge-off, whichever occurs first.
	Three months ended March 31, 2014									Three months ended March 31, 2013
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
(Dollars in thousands)	Number of loans	Recorded investment at period end			Number of loans	Recorded investment at period end				Number of loans	Recorded investment at period end				Number of loans	Recorded investment at period end
Acquired loans
Interest only period provided
Commercial mortgage	2	$	15,906		2	$	15,906			2	$	1,991			1	$	291
Residential mortgage	—	—			—	—				—	—				1	97
Total interest only	2	15,906			2	15,906				2	1,991				2	388
Loan term extension
Construction and land development - commercial	1	281			—	—				—	—				—	—
Total loan term extension	1	281			—	—				—	—				—	—
Below market interest rate
Construction and land development - commercial	1	37			—	—				1	309				—	—
Commercial mortgage	4	5,439			1	47				1	2,946				3	3,222
Commercial and industrial	—	—			—	—				2	458				—	—
Residential mortgage	1	102			1	436				2	726				2	726
Total below market interest rate	6	5,578			2	483				6	4,439				5	3,948
Total acquired restructurings	9	$	21,765		4	$	16,389			8	$	6,430			7	$	4,336
For the three months ended March 31, 2014 and March 31, 2013, the recorded investment in TDRs subsequent to modification was not materially impacted by the modification since forgiveness of principal is not a restructuring option frequently used by BancShares.
The following tables provide information on originated loans and leases that are individually evaluated for impairment as of March 31, 2014 and December 31, 2013.
	March 31, 2014
(Dollars in thousands)	With a			With no				Total				Unpaid				Related
	recorded			recorded								principal				allowance
	allowance			allowance								balance				recorded
Impaired originated loans and leases
Construction and land development - commercial	$	1,646		$	683			$	2,329			$	3,294			$	144
Commercial mortgage	57,568			31,419				88,987				94,950				6,400
Other commercial real estate	755			872				1,627				2,027				203
Commercial and industrial	6,530			2,274				8,804				10,055				769
Lease financing	238			155				393				393				13
Residential mortgage	10,624			5,002				15,626				16,026				1,418
Revolving mortgage	3,210			377				3,587				4,618				353
Construction and land development - noncommercial	699			—				699				699				77
Consumer	1,015			—				1,015				1,039				118
Total impaired originated loans and leases	$	82,285		$	40,782			$	123,067			$	133,101			$	9,495
	December 31, 2013
	With a			With no				Total				Unpaid				Related
	recorded			recorded								principal				allowance
	allowance			allowance								balance				recorded
Impaired originated loans and leases
Construction and land development - commercial	$	1,025		$	1,247			$	2,272			$	7,306			$	103
Commercial mortgage	57,819			39,292				97,111				103,522				6,873
Other commercial real estate	783			1,095				1,878				2,279				209
Commercial and industrial	7,197			2,103				9,300				10,393				771
Lease financing	133			55				188				188				54
Residential mortgage	11,534			4,005				15,539				15,939				1,586
Revolving mortgage	3,382			214				3,596				3,596				372
Construction and land development - noncommercial	651			457				1,108				1,108				72
Consumer	1,154			—				1,154				1,154				121
Total impaired originated loans and leases	$	83,678		$	48,468			$	132,146			$	145,485			$	10,161
The following tables show the average impaired originated loan balance and the interest income recognized by loan class for the three months ended March 31, 2014 and March 31, 2013:
	Three months ended March 31, 2014
(Dollars in thousands)	Average			Interest income recognized
	balance
Impaired originated loans and leases:
Construction and land development - commercial	$	1,031		$	15
Commercial mortgage	94,547			1,120
Other commercial real estate	1,796			21
Commercial and industrial	10,234			118
Lease financing	284			4
Residential mortgage	16,482			174
Revolving mortgage	3,892			27
Construction and land development - noncommercial	2,322			29
Consumer	1,059			5
Total impaired originated loans and leases	$	131,647		$	1,513
	Three months ended March 31, 2013
	Average			Interest income recognized
	balance
Impaired originated loans and leases:
Construction and land development - commercial	$	9,284		$	112
Commercial mortgage	103,848			1,425
Other commercial real estate	3,179			45
Commercial and industrial	18,997			266
Lease financing	355			6
Residential mortgage	17,330			228
Revolving mortgage	5,472			25
Construction and land development - noncommercial	866			11
Consumer	1,683			5
Total impaired originated loans and leases	$	161,014		$	2,123
Troubled Debt Restructurings on Financing Receivables	'
	.
		Three months ended March 31, 2014									Three months ended March 31, 2013
		All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
	(Dollars in thousands)	Number of Loans	Recorded investment at period end			Number of Loans	Recorded investment at period end				Number of Loans	Recorded investment at period end				Number of Loans	Recorded investment at period end
	Originated loans
	Interest only period provided
	Commercial mortgage	4	$	1,911		2	$	410			1	$	356			—	$	—
	Commercial and industrial	1	196			—	—				—	—				—	—
	Lease financing	2	146			—	—				—	—				—	—
	Total interest only	7	2,253			2	410				1	356				—	—
	Loan term extension
	Commercial mortgage	5	2,620			—	—				6	2,117				1	483
	Commercial and industrial	—	—			—	—				1	186				—	—
	Lease financing	2	234			—	—				—	—				—	—
	Residential mortgage	5	338			—	—				4	683				—	—
	Consumer	—	—			1	41				—	—				—	—
	Total loan term extension	12	3,192			1	41				11	2,986				1	483
	Below market interest rate
	Construction and land development - commercial	1	82			—	—				—	—				—	—
	Commercial mortgage	12	4,677			1	449				3	2,556				1	1,024
	Commercial and industrial	2	110			—	—				1	17				1	116
	Residential mortgage	8	451			3	127				5	675				—	—
	Revolving mortgage	5	278			—	—				—	—				—	—
	Consumer	—	—			—	—				5	1,490				—	—
	Total below market interest rate	28	5,598			4	576				14	4,738				2	1,140
	Discharged from bankruptcy
	Commercial mortgage	1	1,003			—	—				—	—				—	—
	Residential mortgage	7	708			2	288				2	299				—	—
	Revolving mortgage	4	229			—	—				24	1,878				5	233
	Construction and land development-noncommercial	1	62			—	—				—	—				—	—
	Consumer	1	18			—	—				—	—				—	—
	Total discharged from bankruptcy	14	2,020			2	288				26	2,177				5	233
	Total originated restructurings	61	$	13,063		9	$	1,315			52	$	10,257			8	$	1,856
	The following tables provide the types of TDRs made during the three months ended March 31, 2014 and March 31, 2013 for acquired loans, as well as a summary of acquired loans that were modified as a TDR during the 12 months ended March 31, 2014 and March 31, 2013 that subsequently defaulted during the three months ended March 31, 2014 and March 31, 2013. BancShares defines payment default as movement of the TDR to nonaccrual status, which is generally 30 days past due for TDRs, foreclosure or charge-off, whichever occurs first.
		Three months ended March 31, 2014									Three months ended March 31, 2013
		All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
	(Dollars in thousands)	Number of loans	Recorded investment at period end			Number of loans	Recorded investment at period end				Number of loans	Recorded investment at period end				Number of loans	Recorded investment at period end
	Acquired loans
	Interest only period provided
	Commercial mortgage	2	$	15,906		2	$	15,906			2	$	1,991			1	$	291
	Residential mortgage	—	—			—	—				—	—				1	97
	Total interest only	2	15,906			2	15,906				2	1,991				2	388
	Loan term extension
	Construction and land development - commercial	1	281			—	—				—	—				—	—
	Total loan term extension	1	281			—	—				—	—				—	—
	Below market interest rate
	Construction and land development - commercial	1	37			—	—				1	309				—	—
	Commercial mortgage	4	5,439			1	47				1	2,946				3	3,222
	Commercial and industrial	—	—			—	—				2	458				—	—
	Residential mortgage	1	102			1	436				2	726				2	726
	Total below market interest rate	6	5,578			2	483				6	4,439				5	3,948
	Total acquired restructurings	9	$	21,765		4	$	16,389			8	$	6,430			7	$	4,336

Other_Real_Estate_Owned_Tables

Other Real Estate Owned (Tables)	3 Months Ended
	Mar. 31, 2014
Banking and Thrift [Abstract]	'
Changes in other real estate owned	'
	The following table explains changes in other real estate owned during the three months ended March 31, 2014 and March 31, 2013.
	(Dollars in thousands)	Covered			Noncovered			Total
	Balance at December 31, 2012	$	102,577		$	43,513		$	146,090
	Additions	29,370			8,763			38,133
	Sales	(27,316		)	(6,347		)	(33,663		)
	Writedowns	(2,730		)	(1,101		)	(3,831		)
	Balance at March 31, 2013	$	101,901		$	44,828		$	146,729
	Balance at December 31, 2013	$	47,081		$	36,898		$	83,979
	Additions 1	1,514			14,909			16,423
	Sales	(4,512		)	(5,854		)	(10,366		)
	Writedowns	(2,228		)	(1,449		)	(3,677		)
	Balance at March 31, 2014	$	41,855		$	44,504		$	86,359
	1 Noncovered additions include $11.6 million from the 1st Financial merger.

Receivable_from_FDIC_for_Loss_1

Receivable from FDIC for Loss Share Agreements (Tables)	3 Months Ended
	Mar. 31, 2014
Receivable From FDIC For Loss Share Agreements [Abstract]	'
Changes in Receivable From FDIC	'
	The following table provides changes in the receivable from the FDIC for the three-month periods ended March 31, 2014 and March 31, 2013.
		Three months ended March 31
	(Dollars in thousands)	2014			2013
	Balance at January 1	$	93,397		$	270,192
	Amortization	(17,744		)	(26,112		)
	Cash payments to (from) FDIC	3,490			(42,519		)
	Post-acquisition adjustments	(4,359		)	(5,619		)
	Balance at March 31	$	74,784		$	195,942

Estimated_Fair_Values_Tables

Estimated Fair Values (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Estimated Fair Values For Certain Financial Assets And Financial Liabilities	'
	For all other financial assets and financial liabilities, the carrying value is a reasonable estimate of the fair value as of March 31, 2014 and December 31, 2013. The carrying value and fair value for these assets and liabilities are equivalent because they are relatively short term in nature and there is no interest rate or credit risk that would cause the fair value to differ from the carrying value.
	(Dollars in thousands)	March 31, 2014				December 31, 2013
		Carrying value		Fair value		Carrying value		Fair value
	Cash and due from banks	$	543,471	$	543,471	$	533,599	$	533,599
	Overnight investments	1,161,469		1,161,469		859,324		859,324
	Investment securities available for sale	5,676,237		5,676,237		5,387,703		5,387,703
	Investment securities held to maturity	782		835		907		974
	Loans held for sale	53,361		54,057		47,271		47,956
	Acquired loans, net of allowance for loan and lease losses	1,225,825		1,201,309		975,906		956,388
	Originated loans, net of allowance for loan and lease losses	12,022,277		11,659,364		11,924,424		11,589,149
	Receivable from the FDIC for loss share agreements (1)	74,784		37,303		93,397		38,438
	Income earned not collected	49,668		49,668		48,390		48,390
	Federal Home Loan Bank stock	34,417		34,417		40,819		40,819
	Preferred stock and other acquired financial assets	17,783		18,521		33,564		34,786
	Deposits	18,763,545		18,785,474		17,874,066		17,898,570
	Short-term borrowings	617,794		617,794		511,418		511,418
	Long-term obligations	440,300		453,313		510,769		526,037
	Payable to the FDIC for loss share agreements	111,339		115,129		109,378		111,941
	Accrued interest payable	5,675		5,675		6,737		6,737
	Interest rate swap	6,501		6,501		7,220		7,220
	(1) The fair value of the FDIC receivable excludes amortization expected to be recognized in prospective periods.
Assets And Liabilities Carried At Fair Value On A Recurring Basis	'
	For assets and liabilities carried at fair value on a recurring basis, the following table provides fair value information as of March 31, 2014 and December 31, 2013.
		March 31, 2014
				Fair value measurements using:
	(Dollars in thousands)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
	Assets measured at fair value
	Investment securities available for sale
	U.S. Treasury	$	1,273,221	$	—	$	1,273,221	$	—
	Government agency	1,812,774		—		1,812,774		—
	Mortgage-backed securities	2,566,666		—		2,566,666		—
	Equity securities	22,560		—		22,560		—
	Municipal securities	186		—		186		—
	Other	830		—		830		—
	Total	$	5,676,237	$	—	$	5,676,237	$	—
	Liabilities measured at fair value
	Interest rate swaps accounted for as cash flow hedges	$	6,501	$	—	$	6,501	$	—
		December 31, 2013
				Fair value measurements using:
		Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
	Assets measured at fair value
	Investment securities available for sale
	U.S. Treasury	$	373,437	$	—	$	373,437	$	—
	Government agency	2,544,229		—		2,544,229		—
	Mortgage-backed securities	2,446,873		—		2,446,873		—
	Equity securities	22,147		—		22,147		—
	Municipal securities	187		—		187		—
	Other	830		—		830		—
	Total	$	5,387,703	$	—	$	5,387,703	$	—
	Liabilities measured at fair value
	Interest rate swaps accounted for as cash flow hedges	$	7,220	$	—	$	7,220	$	—
Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis	'
	For financial assets and liabilities carried at fair value on a nonrecurring basis, the following table provides fair value information as of March 31, 2014 and December 31, 2013.
		March 31, 2014
				Fair value measurements using:
	(Dollars in thousands)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
	Loans held for sale	$	14,911	$	—	$	14,911	$	—
	Originated impaired loans	73,301		—		—		73,301
	Other real estate not covered under loss share agreements remeasured during current year	17,678		—		—		17,678
	Other real estate covered under loss share agreements remeasured during current year	32,402		—		—		32,402
		December 31, 2013
				Fair value measurements using:
		Fair value
				Level 1 inputs		Level 2 inputs		Level 3 inputs
	Loans held for sale	29,389		—		29,389		—
	Originated impaired loans	77,817		—		—		77,817
	Other real estate not covered under loss share agreements remeasured during current year	20,526		—		—		20,526
	Other real estate covered under loss share agreements remeasured during current year	37,587		—		—		37,587
Schedule of Fair Value Measurements Of Other Real Estate Opportunities	'
	No financial liabilities were carried at fair value on a nonrecurring basis as of March 31, 2014 and December 31, 2013.

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables) (Defined Benefit Pension)	3 Months Ended
	Mar. 31, 2014
Defined Benefit Pension	'
Defined Benefit Plan Disclosure [Line Items]	'
Schedule of Net Benefit Costs	'
	For the three-month periods ended March 31, 2014 and March 31, 2013, the components of pension expense are as follows:
		Three months ended March 31
	(Dollars in thousands)	2014			2013
	Service cost	$	3,381		$	4,222
	Interest cost	6,556			5,895
	Expected return on assets	(7,812		)	(6,931		)
	Amortization of prior service cost	53			53
	Amortization of net actuarial loss	1,546			4,251
	Total pension expense	$	3,724		$	7,490

Derivatives_Tables

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2014
Derivative [Line Items]	'
Schedule Of Accumulated Other Comprehensive Income (Loss)	'
	Accumulated other comprehensive loss included the following as of March 31, 2014 and December 31, 2013:
		March 31, 2014									December 31, 2013
	(Dollars in thousands)	Accumulated			Deferred			Accumulated			Accumulated			Deferred			Accumulated
		other			tax			other			other			tax			other
		comprehensive			benefit			comprehensive			comprehensive			benefit			comprehensive
		loss						loss,			loss						loss,
								net of tax									net of tax
	Unrealized losses on investment securities available for sale, net	$	(4,733	)	$	(1,898	)	$	(2,835	)	$	(16,632	)	$	(6,541	)	$	(10,091	)
	Unrealized loss on cash flow hedge	(6,501		)	(2,508		)	(3,993		)	(7,220		)	(2,786		)	(4,434		)
	Funded status of defined benefit plan	(15,983		)	(6,217		)	(9,766		)	(17,582		)	(6,839		)	(10,743		)
	Total	$	(27,217	)	$	(10,623	)	$	(16,594	)	$	(41,434	)	$	(16,166	)	$	(25,268	)
	The following table highlights changes in accumulated other comprehensive loss by component for the three months ended March 31, 2014 and March 31, 2013:
		Three months ended March 31, 2014
	(Dollars in thousands)	Unrealized gains and losses on available for sale securities1			Gains and losses on cash flow hedges1			Defined benefit pension items1			Total
	Beginning balance	$	(10,091	)	$	(4,434	)	$	(10,743	)	$	(25,268	)
	Other comprehensive income before reclassifications	7,256			441			—			7,697
	Amounts reclassified from accumulated other comprehensive loss	—			—			977			977
	Net current period other comprehensive income	7,256			441			977			8,674
	Ending balance	$	(2,835	)	$	(3,993	)	$	(9,766	)	$	(16,594	)
		Three months ended March 31, 2013
		Unrealized gains and losses on available for sale securities1			Gains and losses on cash flow hedges1			Defined benefit pension items1			Total
	Beginning balance	$	20,517		$	(6,292	)	$	(96,331	)	$	(82,106	)
	Other comprehensive income before reclassifications	(911		)	493			—			(418		)
	Amounts reclassified from accumulated other comprehensive loss	—			—			2,619			2,619
	Net current period other comprehensive (loss) income	(911		)	493			2,619			2,201
	Ending balance	$	19,606		$	(5,799	)	$	(93,712	)	$	(79,905	)
	1 All amounts are net of tax. Amounts in parentheses indicate debits.
Interest Rate Swap	'
Derivative [Line Items]	'
Schedule Of Interest Rate Swaps	'
		March 31, 2014						December 31, 2013
	(Dollars in thousands)	Notional  amount			Estimated fair value of liability			Notional  amount			Estimated fair value of liability
	2011 interest rate swap hedging variable rate exposure on trust preferred securities 2011-2016	$	93,500		$	6,501		$	93,500		$	7,220

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Schedule Of Accumulated Other Comprehensive Income (Loss)	'
	Accumulated other comprehensive loss included the following as of March 31, 2014 and December 31, 2013:
		March 31, 2014										December 31, 2013
	(Dollars in thousands)	Accumulated				Deferred			Accumulated			Accumulated			Deferred			Accumulated
		other				tax			other			other			tax			other
		comprehensive				benefit			comprehensive			comprehensive			benefit			comprehensive
		loss							loss,			loss						loss,
									net of tax									net of tax
	Unrealized losses on investment securities available for sale, net	$	(4,733	)		$	(1,898	)	$	(2,835	)	$	(16,632	)	$	(6,541	)	$	(10,091	)
	Unrealized loss on cash flow hedge	(6,501		)		(2,508		)	(3,993		)	(7,220		)	(2,786		)	(4,434		)
	Funded status of defined benefit plan	(15,983		)		(6,217		)	(9,766		)	(17,582		)	(6,839		)	(10,743		)
	Total	$	(27,217	)		$	(10,623	)	$	(16,594	)	$	(41,434	)	$	(16,166	)	$	(25,268	)
	The following table highlights changes in accumulated other comprehensive loss by component for the three months ended March 31, 2014 and March 31, 2013:
		Three months ended March 31, 2014
	(Dollars in thousands)	Unrealized gains and losses on available for sale securities1				Gains and losses on cash flow hedges1			Defined benefit pension items1			Total
	Beginning balance	$	(10,091	)		$	(4,434	)	$	(10,743	)	$	(25,268	)
	Other comprehensive income before reclassifications	7,256				441			—			7,697
	Amounts reclassified from accumulated other comprehensive loss	—				—			977			977
	Net current period other comprehensive income	7,256				441			977			8,674
	Ending balance	$	(2,835	)		$	(3,993	)	$	(9,766	)	$	(16,594	)
		Three months ended March 31, 2013
		Unrealized gains and losses on available for sale securities1				Gains and losses on cash flow hedges1			Defined benefit pension items1			Total
	Beginning balance	$	20,517			$	(6,292	)	$	(96,331	)	$	(82,106	)
	Other comprehensive income before reclassifications	(911		)		493			—			(418		)
	Amounts reclassified from accumulated other comprehensive loss	—				—			2,619			2,619
	Net current period other comprehensive (loss) income	(911		)		493			2,619			2,201
	Ending balance	$	19,606			$	(5,799	)	$	(93,712	)	$	(79,905	)
	1 All amounts are net of tax. Amounts in parentheses indicate debits.
Reclassification out of Accumulated Other Comprehensive Income	'
			Three months ended March 31, 2014
	Details about accumulated other comprehensive loss		Amount reclassified from accumulated other comprehensive income1				Affected line item in the statement where net income is presented
	(Dollars in thousands)
	Amortization of defined benefit pension items
	Prior service costs		$	(53	)		Employee benefits
	Actuarial losses		(1,546		)		Employee benefits
			(1,599		)		Income before income taxes
			622				Income taxes
			$	(977	)		Net income
	Total reclassifications for the period		$	(977	)
			Three months ended March 31, 2013
	Details about accumulated other comprehensive loss		Amount reclassified from accumulated other comprehensive income1				Affected line item in the statement where net income is presented
	Amortization of defined benefit pension items
	Prior service costs		$	(53	)		Employee benefits
	Actuarial losses		(4,251		)		Employee benefits
			(4,304		)		Income before income taxes
			1,685				Income taxes
			$	(2,619	)		Net income
	Total reclassifications for the period		$	(2,619	)
	1 Amounts in parentheses indicate debits to profit/loss.

Business_Combinations_Details

Business Combinations (Details) (USD $)	3 Months Ended		0 Months Ended	3 Months Ended	0 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Jan. 02, 2014	Mar. 31, 2014	Jan. 02, 2014	Jan. 02, 2014	Jan. 02, 2014	Jan. 02, 2014
			1st Financial	1st Financial	1st Financial	1st Financial	1st Financial	1st Financial
					Minimum	Maximum	As recorded by 1st Financial	Fair value adjustments
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'
Consideration transferred	'	'	$10,000,000	'	'	'	'	'
Cash and cash equivalents	'	'	28,194,000	'	'	'	28,194,000	0
Investment securities available for sale	'	'	237,438,000	'	'	'	246,890,000	-9,452,000
Loans held for sale	'	'	1,183,000	'	'	'	1,183,000	0
Restricted equity securities	'	'	3,776,000	'	'	'	3,105,000	671,000
Loans	'	'	316,327,000	'	'	'	338,170,000	-21,843,000
Less: allowance for loan losses	'	'	0	'	'	'	-7,796,000	7,796,000
Premises and equipment	'	'	2,686,000	'	'	'	3,871,000	-1,185,000
Other real estate owned	'	'	11,591,000	'	'	'	12,896,000	-1,305,000
Intangible asset	'	'	3,780,000	'	'	'	0	3,780,000
Other assets	'	'	16,346,000	'	'	'	16,811,000	-465,000
Total assets acquired	'	'	621,321,000	'	'	'	643,324,000	-22,003,000
Noninterest-bearing	'	'	152,444,000	'	'	'	152,444,000	0
Interest-bearing	'	'	479,427,000	'	'	'	477,881,000	1,546,000
Total deposits	'	'	631,871,000	'	'	'	630,325,000	1,546,000
Short-term borrowings	'	'	406,000	'	'	'	406,000	0
Other liabilities	'	'	3,559,000	'	'	'	3,392,000	167,000
Total liabilities assumed	'	'	635,836,000	'	'	'	634,123,000	1,713,000
Net assets acquired	'	'	14,515,000	'	'	'	'	'
Cash paid to shareholders	18,194,000	0	-2,000,000	'	'	'	'	'
Cash paid to acquire TARP securities	'	'	-8,000,000	'	'	'	'	'
Goodwill recorded for 1st Financial	'	'	24,515,000	'	'	'	'	'
Estimated merger costs	'	'	'	'	6,000,000	7,000,000	'	'
Revenue generated	'	'	'	$6,900,000	'	'	'	'

Business_Combinations_Loans_Ac

Business Combinations (Loans Acquired) (Details) (1st Financial, USD $)	Jan. 02, 2014
In Thousands, unless otherwise specified
Business Acquisition [Line Items]	'
Contractually required payments	$414,233
Cash flows expected to be collected	400,622
Loans	316,327
Commercial	'
Business Acquisition [Line Items]	'
Loans	201,265
Commercial | Construction and land development	'
Business Acquisition [Line Items]	'
Loans	41,516
Commercial | Mortgage	'
Business Acquisition [Line Items]	'
Loans	123,925
Commercial | Other commercial real estate	'
Business Acquisition [Line Items]	'
Loans	6,698
Commercial | Commercial and industrial	'
Business Acquisition [Line Items]	'
Loans	29,126
Noncommerical	'
Business Acquisition [Line Items]	'
Loans	115,062
Noncommerical | Mortgage	'
Business Acquisition [Line Items]	'
Loans	113,177
Noncommerical | Consumer	'
Business Acquisition [Line Items]	'
Loans	$1,885

Investments_Aggregate_Values_a

Investments (Aggregate Values and Unrealized Gains and Losses) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investment securities available for sale	'	'
Cost	$5,680,970	$5,404,335
Gross Unrealized Gains	29,684	28,188
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	34,417	44,820
Fair Value	5,676,237	5,387,703
Investment securities held to maturity	'	'
Cost	782	907
U. S. Treasury	'	'
Investment securities available for sale	'	'
Cost	1,274,716	373,223
Gross Unrealized Gains	379	259
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	1,874	45
Fair Value	1,273,221	373,437
Government Agency	'	'
Investment securities available for sale	'	'
Cost	1,811,889	2,543,223
Gross Unrealized Gains	1,764	1,798
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	879	792
Fair Value	1,812,774	2,544,229
Mortgage Backed Securities, Other [Member]	'	'
Investment securities available for sale	'	'
Cost	2,592,766	2,486,297
Gross Unrealized Gains	5,524	4,526
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	31,624	43,950
Fair Value	2,566,666	2,446,873
Investment securities held to maturity	'	'
Cost	782	907
Held To Maturity Securities Accumulated Unrecognized Holding Gain	53	67
Held To Maturity Securities Accumulated Unrecognized Holding Loss	0	0
Fair Value	835	974
Equity Securities	'	'
Investment securities available for sale	'	'
Cost	543	543
Gross Unrealized Gains	22,017	21,604
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	0	0
Fair Value	22,560	22,147
State, County and Municipal	'	'
Investment securities available for sale	'	'
Cost	186	186
Gross Unrealized Gains	0	1
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	0	0
Fair Value	186	187
Other Debt Obligations	'	'
Investment securities available for sale	'	'
Cost	870	863
Gross Unrealized Gains	0	0
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	40	33
Fair Value	$830	$830

Investments_Maturity_Informati

Investments (Maturity Information) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investment securities available for sale	'	'
Total investment securities available for sale, cost	$5,680,970	$5,404,335
Total investment securities available for sale, fair value	5,676,237	5,387,703
Investment securities held to maturity	'	'
Investment securities held to maturity	782	907
Debt Securities	'	'
Investment securities available for sale	'	'
Maturing in one year or less, cost	829,091	839,956
Maturing in one through five years, cost	2,258,570	2,077,539
Maturing in one year or less, fair value	829,997	840,883
Maturing in one through five years, fair value	2,257,014	2,077,800
Equity Securities	'	'
Investment securities available for sale	'	'
Total investment securities available for sale, cost	543	543
Total investment securities available for sale, fair value	22,560	22,147
Mortgage Backed Securities, Other [Member]	'	'
Investment securities available for sale	'	'
Total investment securities available for sale, cost	2,592,766	2,486,297
Total investment securities available for sale, fair value	2,566,666	2,446,873
Investment securities held to maturity	'	'
Investment securities held to maturity	782	907
Fair Value	$835	$974

Investments_Unrealized_Losses_

Investments (Unrealized Losses) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investment securities available for sale:	'	'
Fair Value, Less than 12 months	$3,114,052	$3,104,700
Unrealized Losses, Less than 12 months	33,609	43,715
Fair Value, 12 months or more	23,622	56,830
Unrealized Losses, 12 months or more	808	1,105
Fair Value, Total	3,137,674	3,161,530
Unrealized Losses, Total	34,417	44,820
U. S. Treasury	'	'
Investment securities available for sale:	'	'
Fair Value, Less than 12 months	699,985	102,105
Unrealized Losses, Less than 12 months	1,874	45
Fair Value, 12 months or more	0	0
Unrealized Losses, 12 months or more	0	0
Fair Value, Total	699,985	102,105
Unrealized Losses, Total	1,874	45
Government Agency	'	'
Investment securities available for sale:	'	'
Fair Value, Less than 12 months	400,423	780,552
Unrealized Losses, Less than 12 months	879	761
Fair Value, 12 months or more	0	29,969
Unrealized Losses, 12 months or more	0	31
Fair Value, Total	400,423	810,521
Unrealized Losses, Total	879	792
Mortgage Backed Securities, Other [Member]	'	'
Investment securities available for sale:	'	'
Fair Value, Less than 12 months	2,012,814	2,221,213
Unrealized Losses, Less than 12 months	30,816	42,876
Fair Value, 12 months or more	23,622	26,861
Unrealized Losses, 12 months or more	808	1,074
Fair Value, Total	2,036,436	2,248,074
Unrealized Losses, Total	31,624	43,950
Other Debt Obligations	'	'
Investment securities available for sale:	'	'
Fair Value, Less than 12 months	830	830
Unrealized Losses, Less than 12 months	40	33
Fair Value, 12 months or more	0	0
Unrealized Losses, 12 months or more	0	0
Fair Value, Total	830	830
Unrealized Losses, Total	40	33
State, County and Municipal	'	'
Investment securities available for sale:	'	'
Unrealized Losses, Total	$0	$0

Investments_Narrative_Details

Investments (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
	investments
Investments [Abstract]	'	'
Securities gains (losses)	$0	'
Unrealized Losses Related to Marketability of Securities or Issuer's Ability to Honor Redemption Obligations	0	0
Fair Value, 12 months or more in unrealized loss position	23,622,000	56,830,000
Investment securities, aggregate unrealized loss, continuous unrealized losses of more than 12 months	800,000	'
Number of investments in continuous unrealized loss position for more than twelve months	16	'
Investment value deemed to be OTTI	0	'
Investment securities, aggregate carrying value, pledged as collateral	$2,780,000,000	$2,750,000,000

Loans_and_Leases_Narrative_Det

Loans and Leases (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]	'	'
Noncovered loans pledged to secure debt obligations	$2,570,000,000	$2,560,000,000
Charge off of past due business credit card loans (days)	'120 days	'
Acquired	1,270,818,000	1,029,426,000
Ungraded	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Acquired	139,922,000	19,676,000
1st Financial | Ungraded	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Acquired	$122,200,000	'

Loans_and_Leases_Loans_and_Lea

Loans and Leases (Loans and Leases Outstanding) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Acquired	$1,270,818	$1,029,426
Originated	12,200,226	12,104,298
Total loans and leases	13,471,044	13,133,724
Commercial	'	'
Acquired	923,076	781,307
Originated	8,592,732	8,499,348
Commercial | Construction and land development	'	'
Acquired	106,670	78,915
Originated	335,271	319,847
Commercial | Mortgage	'	'
Acquired	728,872	642,891
Originated	6,330,843	6,362,490
Commercial | Commercial and industrial	'	'
Acquired	38,838	17,254
Originated	1,175,543	1,081,158
Commercial | Lease financing	'	'
Originated	394,268	381,763
Commercial | Other commercial real estate	'	'
Acquired	47,826	41,381
Originated	177,082	178,754
Commercial | Other	'	'
Acquired	870	866
Originated	179,725	175,336
Noncommerical	'	'
Acquired	347,742	248,119
Originated	3,607,494	3,604,950
Noncommerical | Mortgage	'	'
Acquired	291,254	213,851
Originated	1,030,032	982,421
Noncommerical | Construction and land development	'	'
Acquired	28,151	2,583
Originated	119,049	122,792
Noncommerical | Revolving mortgage	'	'
Acquired	25,776	30,834
Originated	2,091,000	2,113,285
Noncommerical | Consumer	'	'
Acquired	2,561	851
Originated	367,413	386,452
Loss Share Agreement [Member]	'	'
Acquired	$962,427	'

Loans_and_Leases_Loans_Acquire

Loans and Leases (Loans Acquired By Loan Class) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	$1,270,818	$1,029,426
Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	923,076	781,307
Commercial | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	106,670	78,915
Commercial | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	728,872	642,891
Commercial | Other commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	47,826	41,381
Commercial | Commercial and industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	38,838	17,254
Commercial | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	870	866
Noncommerical	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	347,742	248,119
Noncommerical | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	291,254	213,851
Noncommerical | Revolving mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	25,776	30,834
Noncommerical | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	28,151	2,583
Noncommerical | Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	$2,561	$851

Loans_and_Leases_Composition_o

Loans and Leases (Composition of the Loans and Leases Outstanding By Credit Quality Indicator) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	$1,270,818	$1,029,426
Total Originated Loans and Leases	12,200,226	12,104,298
Pass	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	601,902	492,831
Special Mention	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	169,325	155,750
Substandard	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	305,724	300,048
Doubtful	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	53,945	61,121
Ungraded	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	139,922	19,676
Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	923,076	781,307
Total Originated Loans and Leases	8,592,732	8,499,348
Commercial | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	106,670	78,915
Total Originated Loans and Leases	335,271	319,847
Commercial | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	728,872	642,891
Total Originated Loans and Leases	6,330,843	6,362,490
Commercial | Other commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	47,826	41,381
Total Originated Loans and Leases	177,082	178,754
Commercial | Commercial and industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	38,838	17,254
Total Originated Loans and Leases	1,175,543	1,081,158
Commercial | Lease financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	394,268	381,763
Commercial | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	870	866
Total Originated Loans and Leases	179,725	175,336
Commercial | Pass	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	8,201,972	8,092,174
Commercial | Pass | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	14,789	2,619
Total Originated Loans and Leases	323,876	308,231
Commercial | Pass | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	375,245	296,824
Total Originated Loans and Leases	6,064,405	6,094,505
Commercial | Pass | Other commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	28,526	22,225
Total Originated Loans and Leases	173,517	174,913
Commercial | Pass | Commercial and industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	29,918	8,021
Total Originated Loans and Leases	1,074,210	964,840
Commercial | Pass | Lease financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	386,324	375,371
Commercial | Pass | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	179,640	174,314
Commercial | Special Mention	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	148,200	147,325
Commercial | Special Mention | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	24,065	15,530
Total Originated Loans and Leases	8,442	8,620
Commercial | Special Mention | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	134,414	125,295
Total Originated Loans and Leases	117,436	119,515
Commercial | Special Mention | Other commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	114	3,431
Total Originated Loans and Leases	1,302	1,362
Commercial | Special Mention | Commercial and industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	3,260	2,585
Total Originated Loans and Leases	16,777	14,686
Commercial | Special Mention | Lease financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	4,233	2,160
Commercial | Special Mention | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	10	982
Commercial | Substandard	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	158,071	156,956
Commercial | Substandard | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	58,374	52,228
Total Originated Loans and Leases	2,953	2,944
Commercial | Substandard | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	182,540	179,657
Total Originated Loans and Leases	143,723	141,913
Commercial | Substandard | Other commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	10,473	7,012
Total Originated Loans and Leases	2,119	2,216
Commercial | Substandard | Commercial and industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	4,686	5,225
Total Originated Loans and Leases	6,051	6,352
Commercial | Substandard | Lease financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	3,155	3,491
Commercial | Substandard | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	70	40
Commercial | Doubtful	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	4,927	6,022
Commercial | Doubtful | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	5,101	7,436
Total Originated Loans and Leases	0	52
Commercial | Doubtful | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	36,040	40,471
Total Originated Loans and Leases	4,227	5,159
Commercial | Doubtful | Other commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	8,713	8,713
Total Originated Loans and Leases	0	75
Commercial | Doubtful | Commercial and industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	954	1,257
Total Originated Loans and Leases	152	144
Commercial | Doubtful | Lease financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	543	592
Commercial | Doubtful | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	5	0
Commercial | Ungraded	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	79,562	96,871
Commercial | Ungraded | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	4,341	1,102
Total Originated Loans and Leases	0	0
Commercial | Ungraded | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	633	644
Total Originated Loans and Leases	1,052	1,398
Commercial | Ungraded | Other commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	0	0
Total Originated Loans and Leases	144	188
Commercial | Ungraded | Commercial and industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	20	166
Total Originated Loans and Leases	78,353	95,136
Commercial | Ungraded | Lease financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	13	149
Commercial | Ungraded | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total Originated Loans and Leases	0	0
Noncommerical	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	347,742	248,119
Total Originated Loans and Leases	3,607,494	3,604,950
Noncommerical | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	291,254	213,851
Total Originated Loans and Leases	1,030,032	982,421
Noncommerical | Revolving mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	25,776	30,834
Total Originated Loans and Leases	2,091,000	2,113,285
Noncommerical | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	28,151	2,583
Total Originated Loans and Leases	119,049	122,792
Noncommerical | Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	2,561	851
Total Originated Loans and Leases	367,413	386,452
Noncommerical | Consumer and Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	3,431	1,717
Noncommerical | Pass | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	131,765	135,326
Noncommerical | Pass | Revolving mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	20,240	26,322
Noncommerical | Pass | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	32	149
Noncommerical | Pass | Consumer and Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	1,387	1,345
Noncommerical | Special Mention | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	4,823	6,301
Noncommerical | Special Mention | Revolving mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	2,649	2,608
Noncommerical | Special Mention | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	0	0
Noncommerical | Special Mention | Consumer and Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	0	0
Noncommerical | Substandard | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	46,044	52,774
Noncommerical | Substandard | Revolving mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	1,891	1,013
Noncommerical | Substandard | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	1,716	2,139
Noncommerical | Substandard | Consumer and Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	0	0
Noncommerical | Doubtful | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	1,931	2,058
Noncommerical | Doubtful | Revolving mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	911	891
Noncommerical | Doubtful | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	295	295
Noncommerical | Doubtful | Consumer and Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	0	0
Noncommerical | Ungraded | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	106,691	17,392
Noncommerical | Ungraded | Revolving mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	85	0
Noncommerical | Ungraded | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	26,108	0
Noncommerical | Ungraded | Consumer and Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Acquired	2,044	372
Originated Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	12,101,606	12,015,067
Total Originated Loans and Leases	12,200,226	12,104,298
30-59 Days Past Due	60,308	44,167
60-89 Days Past Due	11,246	14,236
90 Days or Greater	27,066	30,828
Originated Loans | Commercial | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	333,895	317,778
Total Originated Loans and Leases	335,271	319,847
30-59 Days Past Due	537	1,603
60-89 Days Past Due	184	9
90 Days or Greater	655	457
Originated Loans | Commercial | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	6,291,210	6,333,351
Total Originated Loans and Leases	6,330,843	6,362,490
30-59 Days Past Due	24,451	11,131
60-89 Days Past Due	3,934	3,601
90 Days or Greater	11,248	14,407
Originated Loans | Commercial | Other commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	176,812	177,935
Total Originated Loans and Leases	177,082	178,754
30-59 Days Past Due	155	139
60-89 Days Past Due	11	210
90 Days or Greater	104	470
Originated Loans | Commercial | Commercial and industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	1,170,625	1,076,704
Total Originated Loans and Leases	1,175,543	1,081,158
30-59 Days Past Due	3,921	3,336
60-89 Days Past Due	488	682
90 Days or Greater	509	436
Originated Loans | Commercial | Lease financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	393,096	379,532
Total Originated Loans and Leases	394,268	381,763
30-59 Days Past Due	757	789
60-89 Days Past Due	323	1,341
90 Days or Greater	92	101
Originated Loans | Commercial | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	179,700	175,251
Total Originated Loans and Leases	179,725	175,336
30-59 Days Past Due	20	0
60-89 Days Past Due	5	85
90 Days or Greater	0	0
Originated Loans | Noncommerical	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	3,556,268	3,554,516
Total Originated Loans and Leases	3,607,494	3,604,950
30-59 Days Past Due	30,467	27,169
60-89 Days Past Due	6,301	8,308
90 Days or Greater	14,458	14,957
Originated Loans | Noncommerical | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	1,003,016	955,300
Total Originated Loans and Leases	1,030,032	982,421
30-59 Days Past Due	16,845	12,885
60-89 Days Past Due	1,063	4,658
90 Days or Greater	9,108	9,578
Originated Loans | Noncommerical | Revolving mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	2,072,832	2,095,480
Total Originated Loans and Leases	2,091,000	2,113,285
30-59 Days Past Due	10,578	10,977
60-89 Days Past Due	3,249	2,378
90 Days or Greater	4,341	4,450
Originated Loans | Noncommerical | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	117,161	121,026
Total Originated Loans and Leases	119,049	122,792
30-59 Days Past Due	888	1,193
60-89 Days Past Due	794	317
90 Days or Greater	206	256
Originated Loans | Noncommerical | Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Current	363,259	382,710
Total Originated Loans and Leases	367,413	386,452
30-59 Days Past Due	2,156	2,114
60-89 Days Past Due	1,195	955
90 Days or Greater	$803	$673

Loans_and_Leases_Aging_Of_The_

Loans and Leases (Aging Of The Outstanding Loans and Leases By Class Excluding Loans Impaired At Acquisition Date) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	$12,200,226	$12,104,298
Commercial	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	8,592,732	8,499,348
Commercial | Construction and land development	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	335,271	319,847
Commercial | Mortgage	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	6,330,843	6,362,490
Commercial | Other commercial real estate	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	177,082	178,754
Commercial | Commercial and industrial	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	1,175,543	1,081,158
Commercial | Lease financing	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	394,268	381,763
Commercial | Other	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	179,725	175,336
Noncommerical	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	3,607,494	3,604,950
Noncommerical | Mortgage	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	1,030,032	982,421
Noncommerical | Revolving mortgage	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	2,091,000	2,113,285
Noncommerical | Construction and land development	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	119,049	122,792
Noncommerical | Consumer	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Originated Loans and Leases	367,413	386,452
Originated Loans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	60,308	44,167
60-89 Days Past Due	11,246	14,236
90 Days or Greater	27,066	30,828
Total	98,620	89,231
Current	12,101,606	12,015,067
Total Originated Loans and Leases	12,200,226	12,104,298
Originated Loans | Commercial | Construction and land development	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	537	1,603
60-89 Days Past Due	184	9
90 Days or Greater	655	457
Total	1,376	2,069
Current	333,895	317,778
Total Originated Loans and Leases	335,271	319,847
Originated Loans | Commercial | Mortgage	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	24,451	11,131
60-89 Days Past Due	3,934	3,601
90 Days or Greater	11,248	14,407
Total	39,633	29,139
Current	6,291,210	6,333,351
Total Originated Loans and Leases	6,330,843	6,362,490
Originated Loans | Commercial | Other commercial real estate	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	155	139
60-89 Days Past Due	11	210
90 Days or Greater	104	470
Total	270	819
Current	176,812	177,935
Total Originated Loans and Leases	177,082	178,754
Originated Loans | Commercial | Commercial and industrial	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	3,921	3,336
60-89 Days Past Due	488	682
90 Days or Greater	509	436
Total	4,918	4,454
Current	1,170,625	1,076,704
Total Originated Loans and Leases	1,175,543	1,081,158
Originated Loans | Commercial | Lease financing	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	757	789
60-89 Days Past Due	323	1,341
90 Days or Greater	92	101
Total	1,172	2,231
Current	393,096	379,532
Total Originated Loans and Leases	394,268	381,763
Originated Loans | Commercial | Other	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	20	0
60-89 Days Past Due	5	85
90 Days or Greater	0	0
Total	25	85
Current	179,700	175,251
Total Originated Loans and Leases	179,725	175,336
Originated Loans | Noncommerical	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	30,467	27,169
60-89 Days Past Due	6,301	8,308
90 Days or Greater	14,458	14,957
Current	3,556,268	3,554,516
Total Originated Loans and Leases	3,607,494	3,604,950
Originated Loans | Noncommerical | Mortgage	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	16,845	12,885
60-89 Days Past Due	1,063	4,658
90 Days or Greater	9,108	9,578
Total	27,016	27,121
Current	1,003,016	955,300
Total Originated Loans and Leases	1,030,032	982,421
Originated Loans | Noncommerical | Revolving mortgage	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	10,578	10,977
60-89 Days Past Due	3,249	2,378
90 Days or Greater	4,341	4,450
Total	18,168	17,805
Current	2,072,832	2,095,480
Total Originated Loans and Leases	2,091,000	2,113,285
Originated Loans | Noncommerical | Construction and land development	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	888	1,193
60-89 Days Past Due	794	317
90 Days or Greater	206	256
Total	1,888	1,766
Current	117,161	121,026
Total Originated Loans and Leases	119,049	122,792
Originated Loans | Noncommerical | Consumer	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	2,156	2,114
60-89 Days Past Due	1,195	955
90 Days or Greater	803	673
Total	4,154	3,742
Current	363,259	382,710
Total Originated Loans and Leases	$367,413	$386,452

Loans_and_Leases_Recorded_Inve

Loans and Leases (Recorded Investment, By Class, In Loans And Leases On Nonaccrual Status And Loans And Leases Greater Than 90 Days Past Due And Still Accruing) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	$32,343	$30,801
Commercial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	28,537	26,681
Commercial | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	1,002	1,002
Commercial | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	25,276	23,387
Commercial | Other commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	933	1,150
Commercial | Commercial and industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	1,180	1,142
Commercial | Lease financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	146	0
Noncommerical	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	3,806	4,120
Noncommerical | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	3,806	3,663
Noncommerical | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	0	457
Noncommerical | Revolving mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	0	0
Noncommerical | Consumer and Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	0	0
Originated Loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	46,952	53,170
Loans and leases greater than 90 days and accruing	9,471	8,784
Originated Loans | Commercial | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	702	544
Loans and leases greater than 90 days and accruing	192	0
Originated Loans | Commercial | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	28,910	33,529
Loans and leases greater than 90 days and accruing	927	1,113
Originated Loans | Commercial | Other commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	1,459	1,610
Loans and leases greater than 90 days and accruing	0	0
Originated Loans | Commercial | Commercial and industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	1,075	1,428
Loans and leases greater than 90 days and accruing	393	294
Originated Loans | Commercial | Lease financing	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	689	832
Loans and leases greater than 90 days and accruing	0	0
Originated Loans | Noncommerical | Mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	14,091	14,701
Loans and leases greater than 90 days and accruing	2,609	1,998
Originated Loans | Noncommerical | Construction and land development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	0	457
Loans and leases greater than 90 days and accruing	206	256
Originated Loans | Noncommerical | Revolving mortgage	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	0	0
Loans and leases greater than 90 days and accruing	4,341	4,450
Originated Loans | Noncommerical | Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccruing	26	69
Loans and leases greater than 90 days and accruing	$803	$673

Loans_and_Leases_Changes_In_Ca

Loans and Leases (Changes In Carrying Value Of Acquired Impaired Loans) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2013
			Loans on the Cost Recovery Method	Loans on the Cost Recovery Method
Carrying Value of Acquired Impaired Loans [Roll Forward]	'	'	'	'
Beginning balance	$1,029,426	$2,362,152	$52,100	$28,500
Fair value of acquired impaired loans covered by loss share agreements	316,327	0	'	'
Accretion	30,200	79,886	'	'
Reductions for repayments, foreclosures and changes in carrying value, net of accretion	-105,135	-258,169	'	'
Ending balance	1,270,818	2,183,869	52,100	28,500
Outstanding principal balance	$1,727,492	$3,618,722	'	'

Loans_and_Leases_Changes_In_Ca1

Loans and Leases (Changes In Carrying Amount Of Accretable Yield) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Changes in Amount of Accretable Yield [Roll Forward]	'	'
Beginning balance	$439,990	$539,564
Additions	84,295	0
Accretion	-30,200	-79,886
Reclassifications from (to) nonaccretable difference	6,048	-11,653
Ending balance	490,245	485,935
Changes in expected cash flows that do not affected nonaccretable difference	($9,888)	$37,910

Allowance_for_Loan_and_Lease_L2

Allowance for Loan and Lease Losses (Summary of Activity In Allowance for Loan and Lease Losses) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Net loans and leases	$13,248,102,000	'	$12,900,330,000
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'	'	'
Allowance for loan and lease losses	222,942,000	'	233,394,000
Originated Loans	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	179,874,000	179,046,000	'
Provisions	370,000	4,016,000	'
Charge-offs	-4,422,000	-8,067,000	'
Recoveries	2,127,000	1,551,000	'
Ending balance	177,949,000	176,546,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
ALLL for loans and leases individually evaluated for impairment	9,495,000	'	10,161,000
ALLL for loans and leases collectively evaluated for impairment	168,454,000	'	169,713,000
Total allowance for loan and lease losses	177,949,000	176,546,000	'
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Loans and leases individually evaluated for impairment	123,067,000	'	132,146,000
Loans and leases collectively evaluated for impairment	12,077,159,000	'	11,972,152,000
Net loans and leases	12,200,226,000	'	12,104,298,000
Originated Loans | Commercial | Construction and land development	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	10,335,000	6,031,000	'
Provisions	1,885,000	-1,834,000	'
Charge-offs	0	-254,000	'
Recoveries	26,000	368,000	'
Ending balance	12,246,000	4,311,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
ALLL for loans and leases individually evaluated for impairment	144,000	'	103,000
ALLL for loans and leases collectively evaluated for impairment	12,102,000	'	10,232,000
Total allowance for loan and lease losses	12,246,000	4,311,000	'
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Loans and leases individually evaluated for impairment	2,329,000	'	2,272,000
Loans and leases collectively evaluated for impairment	332,942,000	'	317,575,000
Net loans and leases	335,271,000	'	319,847,000
Originated Loans | Commercial | Mortgage	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	100,257,000	70,927,000	'
Provisions	-6,979,000	2,536,000	'
Charge-offs	-168,000	-654,000	'
Recoveries	1,107,000	8,000	'
Ending balance	94,217,000	72,817,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
ALLL for loans and leases individually evaluated for impairment	6,400,000	'	6,873,000
ALLL for loans and leases collectively evaluated for impairment	87,817,000	'	93,384,000
Total allowance for loan and lease losses	94,217,000	72,817,000	'
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Loans and leases individually evaluated for impairment	88,987,000	'	97,111,000
Loans and leases collectively evaluated for impairment	6,241,856,000	'	6,265,379,000
Net loans and leases	6,330,843,000	'	6,362,490,000
Originated Loans | Commercial | Other commercial real estate	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	1,009,000	2,059,000	'
Provisions	-74,000	-100,000	'
Charge-offs	0	-54,000	'
Recoveries	10,000	10,000	'
Ending balance	945,000	1,915,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
ALLL for loans and leases individually evaluated for impairment	203,000	'	209,000
ALLL for loans and leases collectively evaluated for impairment	742,000	'	800,000
Total allowance for loan and lease losses	945,000	1,915,000	'
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Loans and leases individually evaluated for impairment	1,627,000	'	1,878,000
Loans and leases collectively evaluated for impairment	175,455,000	'	176,876,000
Net loans and leases	177,082,000	'	178,754,000
Originated Loans | Commercial | Commercial and industrial	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	22,362,000	23,352,000	'
Provisions	1,976,000	500,000	'
Charge-offs	-496,000	-1,258,000	'
Recoveries	179,000	369,000	'
Ending balance	24,021,000	22,963,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
ALLL for loans and leases individually evaluated for impairment	769,000	'	771,000
ALLL for loans and leases collectively evaluated for impairment	23,252,000	'	21,591,000
Total allowance for loan and lease losses	24,021,000	22,963,000	'
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Loans and leases individually evaluated for impairment	8,804,000	'	9,300,000
Loans and leases collectively evaluated for impairment	1,166,739,000	'	1,071,858,000
Net loans and leases	1,175,543,000	'	1,081,158,000
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'	'	'
Loans and leases, loan growth	94,400,000	'	'
Originated Loans | Commercial | Lease financing	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	4,749,000	3,521,000	'
Provisions	-524,000	22,000	'
Charge-offs	-58,000	0	'
Recoveries	16,000	0	'
Ending balance	4,183,000	3,543,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
ALLL for loans and leases individually evaluated for impairment	13,000	'	54,000
ALLL for loans and leases collectively evaluated for impairment	4,170,000	'	4,695,000
Total allowance for loan and lease losses	4,183,000	3,543,000	'
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Loans and leases individually evaluated for impairment	393,000	'	188,000
Loans and leases collectively evaluated for impairment	393,875,000	'	381,575,000
Net loans and leases	394,268,000	'	381,763,000
Originated Loans | Commercial | Other	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	190,000	1,175,000	'
Provisions	272,000	315,000	'
Charge-offs	-8,000	0	'
Recoveries	0	0	'
Ending balance	454,000	1,490,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
ALLL for loans and leases individually evaluated for impairment	0	'	0
ALLL for loans and leases collectively evaluated for impairment	454,000	'	190,000
Total allowance for loan and lease losses	454,000	1,490,000	'
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Loans and leases individually evaluated for impairment	0	'	0
Loans and leases collectively evaluated for impairment	179,725,000	'	175,336,000
Net loans and leases	179,725,000	'	175,336,000
Originated Loans | Noncommerical | Mortgage	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	10,511,000	3,836,000	'
Provisions	609,000	733,000	'
Charge-offs	-184,000	-818,000	'
Recoveries	8,000	39,000	'
Ending balance	10,944,000	3,790,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
ALLL for loans and leases individually evaluated for impairment	1,418,000	'	1,586,000
ALLL for loans and leases collectively evaluated for impairment	9,526,000	'	8,925,000
Total allowance for loan and lease losses	10,944,000	3,790,000	'
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Loans and leases individually evaluated for impairment	15,626,000	'	15,539,000
Loans and leases collectively evaluated for impairment	1,014,406,000	'	966,882,000
Net loans and leases	1,030,032,000	'	982,421,000
Originated Loans | Noncommerical | Construction and land development	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	681,000	1,721,000	'
Provisions	577,000	-113,000	'
Charge-offs	-71,000	-245,000	'
Recoveries	62,000	56,000	'
Ending balance	1,249,000	1,419,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
ALLL for loans and leases individually evaluated for impairment	77,000	'	72,000
ALLL for loans and leases collectively evaluated for impairment	1,172,000	'	609,000
Total allowance for loan and lease losses	1,249,000	1,419,000	'
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Loans and leases individually evaluated for impairment	699,000	'	1,108,000
Loans and leases collectively evaluated for impairment	118,350,000	'	121,684,000
Net loans and leases	119,049,000	'	122,792,000
Originated Loans | Noncommerical | Revolving mortgage	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	16,239,000	25,185,000	'
Provisions	1,353,000	1,431,000	'
Charge-offs	-1,260,000	-2,188,000	'
Recoveries	76,000	71,000	'
Ending balance	16,408,000	24,499,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
ALLL for loans and leases individually evaluated for impairment	353,000	'	372,000
ALLL for loans and leases collectively evaluated for impairment	16,055,000	'	15,867,000
Total allowance for loan and lease losses	16,408,000	24,499,000	'
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Loans and leases individually evaluated for impairment	3,587,000	'	3,596,000
Loans and leases collectively evaluated for impairment	2,087,413,000	'	2,109,689,000
Net loans and leases	2,091,000,000	'	2,113,285,000
Originated Loans | Noncommerical | Consumer	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	13,541,000	25,389,000	'
Provisions	1,275,000	604,000	'
Charge-offs	-2,177,000	-2,596,000	'
Recoveries	643,000	630,000	'
Ending balance	13,282,000	24,027,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
ALLL for loans and leases individually evaluated for impairment	118,000	'	121,000
ALLL for loans and leases collectively evaluated for impairment	13,164,000	'	13,420,000
Total allowance for loan and lease losses	13,282,000	24,027,000	'
Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Loans and leases individually evaluated for impairment	1,015,000	'	1,154,000
Loans and leases collectively evaluated for impairment	366,398,000	'	385,298,000
Net loans and leases	367,413,000	'	386,452,000
Originated Loans | Noncommerical | Non-specific	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	0	15,850,000	'
Provisions	0	-78,000	'
Charge-offs	0	0	'
Recoveries	0	0	'
Ending balance	0	15,772,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Total allowance for loan and lease losses	0	15,772,000	'
Acquired Loans	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	53,520,000	139,972,000	'
Provisions	-2,273,000	-22,622,000	'
Charge-offs	-6,254,000	-20,877,000	'
Recoveries	0	0	'
Ending balance	44,993,000	96,473,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Total allowance for loan and lease losses	44,993,000	96,473,000	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'	'	'
ALLL for loans and leases acquired with deteriorated credit quality	44,993,000	'	53,520,000
Loans and leases acquired with deteriorated credit quality	1,270,818,000	'	1,029,426,000
Acquired Loans | Commercial | Construction and land development	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	1,320,000	31,186,000	'
Provisions	3,355,000	-13,147,000	'
Charge-offs	-199,000	-4,733,000	'
Recoveries	0	0	'
Ending balance	4,476,000	13,306,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Total allowance for loan and lease losses	4,476,000	13,306,000	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'	'	'
ALLL for loans and leases acquired with deteriorated credit quality	4,476,000	'	1,320,000
Loans and leases acquired with deteriorated credit quality	106,670,000	'	78,915,000
Acquired Loans | Commercial | Mortgage	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	29,906,000	50,275,000	'
Provisions	-3,386,000	-2,084,000	'
Charge-offs	-3,517,000	-9,898,000	'
Recoveries	0	0	'
Ending balance	23,003,000	38,293,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Total allowance for loan and lease losses	23,003,000	38,293,000	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'	'	'
ALLL for loans and leases acquired with deteriorated credit quality	23,003,000	'	29,906,000
Loans and leases acquired with deteriorated credit quality	728,872,000	'	642,891,000
Acquired Loans | Commercial | Other commercial real estate	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	1,354,000	11,234,000	'
Provisions	-150,000	-5,131,000	'
Charge-offs	0	-931,000	'
Recoveries	0	0	'
Ending balance	1,204,000	5,172,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Total allowance for loan and lease losses	1,204,000	5,172,000	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'	'	'
ALLL for loans and leases acquired with deteriorated credit quality	1,204,000	'	1,354,000
Loans and leases acquired with deteriorated credit quality	47,826,000	'	41,381,000
Acquired Loans | Commercial | Commercial and industrial	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	5,275,000	8,897,000	'
Provisions	-336,000	4,233,000	'
Charge-offs	-2,683,000	-1,254,000	'
Recoveries	0	0	'
Ending balance	2,256,000	11,876,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Total allowance for loan and lease losses	2,256,000	11,876,000	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'	'	'
ALLL for loans and leases acquired with deteriorated credit quality	2,256,000	'	5,275,000
Loans and leases acquired with deteriorated credit quality	38,838,000	'	17,254,000
Acquired Loans | Noncommerical | Mortgage	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	11,802,000	19,837,000	'
Provisions	-2,300,000	-1,505,000	'
Charge-offs	262,000	-729,000	'
Recoveries	0	0	'
Ending balance	9,764,000	17,603,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Total allowance for loan and lease losses	9,764,000	17,603,000	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'	'	'
ALLL for loans and leases acquired with deteriorated credit quality	9,764,000	'	11,802,000
Loans and leases acquired with deteriorated credit quality	291,254,000	'	213,851,000
Acquired Loans | Noncommerical | Construction and land development	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	682,000	8,287,000	'
Provisions	-99,000	-2,313,000	'
Charge-offs	0	-3,218,000	'
Recoveries	0	0	'
Ending balance	583,000	2,756,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Total allowance for loan and lease losses	583,000	2,756,000	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'	'	'
ALLL for loans and leases acquired with deteriorated credit quality	583,000	'	682,000
Loans and leases acquired with deteriorated credit quality	28,151,000	'	2,583,000
Acquired Loans | Noncommerical | Revolving mortgage	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	2,959,000	9,754,000	'
Provisions	634,000	-2,505,000	'
Charge-offs	-100,000	-114,000	'
Recoveries	0	0	'
Ending balance	3,493,000	7,135,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Total allowance for loan and lease losses	3,493,000	7,135,000	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'	'	'
ALLL for loans and leases acquired with deteriorated credit quality	3,493,000	'	2,959,000
Loans and leases acquired with deteriorated credit quality	25,776,000	'	30,834,000
Acquired Loans | Noncommerical | Consumer and Other	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'
Beginning balance	222,000	502,000	'
Provisions	9,000	-170,000	'
Charge-offs	-17,000	0	'
Recoveries	0	0	'
Ending balance	214,000	332,000	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'	'	'
Total allowance for loan and lease losses	214,000	332,000	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'	'	'
ALLL for loans and leases acquired with deteriorated credit quality	214,000	'	222,000
Loans and leases acquired with deteriorated credit quality	$3,431,000	'	$1,717,000

Allowance_for_Loan_and_Lease_L3

Allowance for Loan and Lease Losses (Allocation of Allowance for Loan and Lease Losses) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	$222,942,000	'	$233,394,000
Originated Loans	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Unpaid principal balance	133,101,000	'	145,485,000
ALLL for loans and leases individually evaluated for impairment	9,495,000	'	10,161,000
Financing Receivable, Individually Evaluated for Impairment	123,067,000	'	132,146,000
Average balance	131,647,000	161,014,000	'
Interest income recognized	1,513,000	2,123,000	'
Originated Loans | Commercial | Construction and land development	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Unpaid principal balance	3,294,000	'	7,306,000
ALLL for loans and leases individually evaluated for impairment	144,000	'	103,000
Financing Receivable, Individually Evaluated for Impairment	2,329,000	'	2,272,000
Average balance	1,031,000	9,284,000	'
Interest income recognized	15,000	112,000	'
Originated Loans | Commercial | Mortgage	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Unpaid principal balance	94,950,000	'	103,522,000
ALLL for loans and leases individually evaluated for impairment	6,400,000	'	6,873,000
Financing Receivable, Individually Evaluated for Impairment	88,987,000	'	97,111,000
Average balance	94,547,000	103,848,000	'
Interest income recognized	1,120,000	1,425,000	'
Originated Loans | Commercial | Other commercial real estate	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Unpaid principal balance	2,027,000	'	2,279,000
ALLL for loans and leases individually evaluated for impairment	203,000	'	209,000
Financing Receivable, Individually Evaluated for Impairment	1,627,000	'	1,878,000
Average balance	1,796,000	3,179,000	'
Interest income recognized	21,000	45,000	'
Originated Loans | Commercial | Commercial and industrial	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Unpaid principal balance	10,055,000	'	10,393,000
ALLL for loans and leases individually evaluated for impairment	769,000	'	771,000
Financing Receivable, Individually Evaluated for Impairment	8,804,000	'	9,300,000
Average balance	10,234,000	18,997,000	'
Interest income recognized	118,000	266,000	'
Originated Loans | Commercial | Lease financing	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Unpaid principal balance	393,000	'	188,000
ALLL for loans and leases individually evaluated for impairment	13,000	'	54,000
Financing Receivable, Individually Evaluated for Impairment	393,000	'	188,000
Average balance	284,000	355,000	'
Interest income recognized	4,000	6,000	'
Originated Loans | Commercial | Other	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
ALLL for loans and leases individually evaluated for impairment	0	'	0
Financing Receivable, Individually Evaluated for Impairment	0	'	0
Originated Loans | Noncommerical | Mortgage	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Unpaid principal balance	16,026,000	'	15,939,000
ALLL for loans and leases individually evaluated for impairment	1,418,000	'	1,586,000
Financing Receivable, Individually Evaluated for Impairment	15,626,000	'	15,539,000
Average balance	16,482,000	17,330,000	'
Interest income recognized	174,000	228,000	'
Originated Loans | Noncommerical | Construction and land development	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Unpaid principal balance	699,000	'	1,108,000
ALLL for loans and leases individually evaluated for impairment	77,000	'	72,000
Financing Receivable, Individually Evaluated for Impairment	699,000	'	1,108,000
Average balance	2,322,000	866,000	'
Interest income recognized	29,000	11,000	'
Originated Loans | Noncommerical | Revolving mortgage	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Unpaid principal balance	4,618,000	'	3,596,000
ALLL for loans and leases individually evaluated for impairment	353,000	'	372,000
Financing Receivable, Individually Evaluated for Impairment	3,587,000	'	3,596,000
Average balance	3,892,000	5,472,000	'
Interest income recognized	27,000	25,000	'
Originated Loans | Noncommerical | Consumer	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Unpaid principal balance	1,039,000	'	1,154,000
ALLL for loans and leases individually evaluated for impairment	118,000	'	121,000
Financing Receivable, Individually Evaluated for Impairment	1,015,000	'	1,154,000
Average balance	1,059,000	1,683,000	'
Interest income recognized	5,000	5,000	'
Originated Loans | With A Recorded Allowance	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Total impaired noncovered loans and leases	82,285,000	'	83,678,000
Originated Loans | With A Recorded Allowance | Commercial | Construction and land development	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	1,646,000	'	1,025,000
Originated Loans | With A Recorded Allowance | Commercial | Mortgage	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	57,568,000	'	57,819,000
Originated Loans | With A Recorded Allowance | Commercial | Other commercial real estate	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	755,000	'	783,000
Originated Loans | With A Recorded Allowance | Commercial | Commercial and industrial	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	6,530,000	'	7,197,000
Originated Loans | With A Recorded Allowance | Commercial | Lease financing	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	238,000	'	133,000
Originated Loans | With A Recorded Allowance | Noncommerical | Mortgage	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	10,624,000	'	11,534,000
Originated Loans | With A Recorded Allowance | Noncommerical | Construction and land development	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	699,000	'	651,000
Originated Loans | With A Recorded Allowance | Noncommerical | Revolving mortgage	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	3,210,000	'	3,382,000
Originated Loans | With A Recorded Allowance | Noncommerical | Consumer	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	1,015,000	'	1,154,000
Originated Loans | With No Recorded Allowance	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	40,782,000	'	48,468,000
Originated Loans | With No Recorded Allowance | Commercial | Construction and land development	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	683,000	'	1,247,000
Originated Loans | With No Recorded Allowance | Commercial | Mortgage	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	31,419,000	'	39,292,000
Originated Loans | With No Recorded Allowance | Commercial | Other commercial real estate	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	872,000	'	1,095,000
Originated Loans | With No Recorded Allowance | Commercial | Commercial and industrial	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	2,274,000	'	2,103,000
Originated Loans | With No Recorded Allowance | Commercial | Lease financing	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	155,000	'	55,000
Originated Loans | With No Recorded Allowance | Noncommerical | Mortgage	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	5,002,000	'	4,005,000
Originated Loans | With No Recorded Allowance | Noncommerical | Construction and land development	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	0	'	457,000
Originated Loans | With No Recorded Allowance | Noncommerical | Revolving mortgage	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	377,000	'	214,000
Originated Loans | With No Recorded Allowance | Noncommerical | Consumer	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Allowance for loan and lease losses	0	'	0
Acquired Loans	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Acquired loans which have adverse change in expected cash flows	$382,600,000	'	$459,900,000

Allowance_for_Loan_and_Lease_L4

Allowance for Loan and Lease Losses (Troubled Debt Restructuring) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Modifications [Line Items]	'	'
Accruing	$198,658	$175,955
Nonaccruing	32,343	30,801
Financing Receivable, Modifications, Recorded Investment	231,001	206,756
TDRs	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	198,658	175,955
Nonaccruing	32,343	30,801
Financing Receivable, Modifications, Recorded Investment	231,001	206,756
Originated Loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Nonaccruing	46,952	53,170
Originated Loans | TDRs	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	93,016	85,126
Nonaccruing	20,717	19,322
Financing Receivable, Modifications, Recorded Investment	113,733	104,448
Acquired Loans | TDRs	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	105,642	90,829
Nonaccruing	11,626	11,479
Financing Receivable, Modifications, Recorded Investment	117,268	102,308
Commercial	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	169,838	147,712
Nonaccruing	28,537	26,681
Financing Receivable, Modifications, Recorded Investment	198,375	174,393
Commercial | Construction and land development	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	20,791	21,032
Nonaccruing	1,002	1,002
Financing Receivable, Modifications, Recorded Investment	21,793	22,034
Commercial | Construction and land development | Originated Loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Nonaccruing	702	544
Commercial | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	136,563	113,323
Nonaccruing	25,276	23,387
Financing Receivable, Modifications, Recorded Investment	161,839	136,710
Commercial | Mortgage | Originated Loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Nonaccruing	28,910	33,529
Commercial | Other commercial real estate	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	3,308	3,470
Nonaccruing	933	1,150
Financing Receivable, Modifications, Recorded Investment	4,241	4,620
Commercial | Other commercial real estate | Originated Loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Nonaccruing	1,459	1,610
Commercial | Commercial and industrial	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	8,929	9,838
Nonaccruing	1,180	1,142
Financing Receivable, Modifications, Recorded Investment	10,109	10,980
Commercial | Commercial and industrial | Originated Loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Nonaccruing	1,075	1,428
Commercial | Lease financing	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	247	49
Nonaccruing	146	0
Financing Receivable, Modifications, Recorded Investment	393	49
Commercial | Lease financing | Originated Loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Nonaccruing	689	832
Noncommerical	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	28,820	28,243
Nonaccruing	3,806	4,120
Financing Receivable, Modifications, Recorded Investment	32,626	32,363
Noncommerical | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	23,519	23,343
Nonaccruing	3,806	3,663
Financing Receivable, Modifications, Recorded Investment	27,325	27,006
Noncommerical | Mortgage | Originated Loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Nonaccruing	14,091	14,701
Noncommerical | Construction and land development	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	699	651
Nonaccruing	0	457
Financing Receivable, Modifications, Recorded Investment	699	1,108
Noncommerical | Construction and land development | Originated Loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Nonaccruing	0	457
Noncommerical | Revolving mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	3,587	3,095
Nonaccruing	0	0
Financing Receivable, Modifications, Recorded Investment	3,587	3,095
Noncommerical | Revolving mortgage | Originated Loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Nonaccruing	0	0
Noncommerical | Consumer and Other	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accruing	1,015	1,154
Nonaccruing	0	0
Financing Receivable, Modifications, Recorded Investment	$1,015	$1,154

Allowance_for_Loan_and_Lease_L5

Allowance for Loan and Lease Losses (Note Restructurings During Period) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
	loans	loans
Originated Loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	61	52
Financing Receivable, Modifications, Post-Modification Recorded Investment	$13,063	$10,257
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	9	8
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,315	1,856
Originated Loans | Interest Only Loan	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	7	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,253	356
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	410	0
Originated Loans | Loan Term Extension	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	12	11
Financing Receivable, Modifications, Post-Modification Recorded Investment	3,192	2,986
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	41	483
Originated Loans | Below Market Interest Rate	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	28	14
Financing Receivable, Modifications, Post-Modification Recorded Investment	5,598	4,738
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	4	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	576	1,140
Originated Loans | Discharge of Debt	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	14	26
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,020	2,177
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	5
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	288	233
Originated Loans | Commercial | Interest Only Loan | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	4	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,911	356
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	410	0
Originated Loans | Commercial | Interest Only Loan | Commercial and industrial	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	196	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Originated Loans | Commercial | Interest Only Loan | Lease financing	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	146	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Originated Loans | Commercial | Loan Term Extension | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	5	6
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,620	2,117
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	483
Originated Loans | Commercial | Loan Term Extension | Commercial and industrial	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	186
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Originated Loans | Commercial | Loan Term Extension | Lease financing	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	234	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Originated Loans | Commercial | Below Market Interest Rate | Construction and land development	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	82	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Originated Loans | Commercial | Below Market Interest Rate | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	12	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	4,677	2,556
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	449	1,024
Originated Loans | Commercial | Below Market Interest Rate | Commercial and industrial	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	2	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	110	17
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	116
Originated Loans | Commercial | Discharge of Debt | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,003	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Originated Loans | Noncommerical | Loan Term Extension | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	5	4
Financing Receivable, Modifications, Post-Modification Recorded Investment	338	683
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Originated Loans | Noncommerical | Loan Term Extension | Consumer	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	41	0
Originated Loans | Noncommerical | Below Market Interest Rate | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	8	5
Financing Receivable, Modifications, Post-Modification Recorded Investment	451	675
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	3	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	127	0
Originated Loans | Noncommerical | Below Market Interest Rate | Revolving mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	5	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	278	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Originated Loans | Noncommerical | Below Market Interest Rate | Consumer	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	0	5
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	1,490
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Originated Loans | Noncommerical | Discharge of Debt | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	7	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	708	299
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	288	0
Originated Loans | Noncommerical | Discharge of Debt | Construction and land development	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	62	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Originated Loans | Noncommerical | Discharge of Debt | Revolving mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	4	24
Financing Receivable, Modifications, Post-Modification Recorded Investment	229	1,878
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	5
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	233
Originated Loans | Noncommerical | Discharge of Debt | Consumer	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	18	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Acquired Loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	9	8
Financing Receivable, Modifications, Post-Modification Recorded Investment	21,765	6,430
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	4	7
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	16,389	4,336
Acquired Loans | Interest Only Loan	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	2	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	15,906	1,991
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	15,906	388
Acquired Loans | Loan Term Extension	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	281	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Acquired Loans | Below Market Interest Rate	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	6	6
Financing Receivable, Modifications, Post-Modification Recorded Investment	5,578	4,439
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	5
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	483	3,948
Acquired Loans | Commercial | Interest Only Loan | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	2	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	15,906	1,991
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	15,906	291
Acquired Loans | Commercial | Loan Term Extension | Construction and land development	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	281	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Acquired Loans | Commercial | Below Market Interest Rate | Construction and land development	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	37	309
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Acquired Loans | Commercial | Below Market Interest Rate | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	4	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	5,439	2,946
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	47	3,222
Acquired Loans | Commercial | Below Market Interest Rate | Commercial and industrial	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	458
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Acquired Loans | Noncommerical | Interest Only Loan | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	97
Acquired Loans | Noncommerical | Below Market Interest Rate | Mortgage	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	102	726
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$436	$726

Other_Real_Estate_Owned_Detail

Other Real Estate Owned (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Covered	'		'
Beginning balance	$47,081		$102,577
Additions	1,514		29,370
Sales	-4,512		-27,316
Writedowns	-2,228		-2,730
Ending balance	41,855	[1]	101,901	[1]
Noncovered	'		'
Beginning balance	36,898		43,513
Additions	14,909	[2]	8,763
Sales	-5,854		-6,347
Writedowns	-1,449		-1,101
Ending balance	44,504	[1],[2]	44,828	[1]
Total	'		'
Beginning balance	83,979		146,090
Additions	16,423	[2]	38,133
Sales	-10,366		-33,663
Writedowns	-3,677		-3,831
Ending balance	86,359	[2]	146,729
1st Financial	'		'
Noncovered	'		'
Additions	$11,600	[2]	'
[1]	Text selection found with no content.
[2]	Noncovered additions include $11.6 million from the 1st Financial merger.

Receivable_from_FDIC_for_Loss_2

Receivable from FDIC for Loss Share Agreements (Changes in Receivable from FDIC) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Receivable From FDIC For Loss Share Agreements [Abstract]	'	'	'
FDIC Indemnification Asset	$74,784	'	$93,397
Receivable From FDIC For Loss Share Agreements [Roll Forward]	'	'	'
Balance at beginning of period	93,397	270,192	'
Accretion of discounts and premiums, net	-17,744	-26,112	'
Receipt of payments from FDIC	3,490	-42,519	'
Post-acquisition and other adjustments, net	-4,359	-5,619	'
Balance at end of period	'	$195,942	'

Estimated_Fair_Values_Estimate

Estimated Fair Values (Estimated Fair Values For Certain Financial Assets And Financial Liabilities) (Details) (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Cash and due from banks	$543,471		$533,599
Overnight investments	1,161,469		859,324
Investment securities available for sale	5,676,237		5,387,703
Investment securities held to maturity	782		907
Loans held for sale	53,361		47,271
FDIC Indemnification Asset	74,784		93,397
Income earned not collected	49,668		48,390
Deposits	18,763,545		17,874,066
FDIC loss share payable	111,339		109,378
Carrying Value	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Cash and due from banks	543,471		533,599
Overnight investments	1,161,469		859,324
Investment securities available for sale	5,676,237		5,387,703
Investment securities held to maturity	782		907
Loans held for sale	53,361		47,271
Loans covered by loss share agreements, net of allowance for loan and lease losses	1,225,825		975,906
Loans and leases not covered by loss share agreements, net of allowance for loan and lease losses	12,022,277		11,924,424
FDIC Indemnification Asset	74,784	[1]	93,397	[1]
Income earned not collected	49,668		48,390
Preferred stock	17,783		33,564
Deposits	18,763,545		17,874,066
Short-term borrowings	617,794		511,418
Long-term obligations	440,300		510,769
FDIC loss share payable	111,339		109,378
Accrued interest payable	5,675		6,737
Derivative Liability, Fair Value, Gross Liability	6,501		7,220
Fair Value	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Cash and due from banks	543,471		533,599
Overnight investments	1,161,469		859,324
Investment securities available for sale	5,676,237		5,387,703
Investment securities held to maturity	835		974
Loans held for sale	54,057		47,956
Loans covered by loss share agreements, net of allowance for loan and lease losses	1,201,309		956,388
Loans and leases not covered by loss share agreements, net of allowance for loan and lease losses	11,659,364		11,589,149
FDIC Indemnification Asset	37,303	[1]	38,438	[1]
Income earned not collected	49,668		48,390
Stock issued by Federal Home Loan Bank	34,417		40,819
Preferred stock	18,521		34,786
Deposits	18,785,474		17,898,570
Short-term borrowings	617,794		511,418
Long-term obligations	453,313		526,037
FDIC loss share payable	115,129		111,941
Accrued interest payable	5,675		6,737
Derivative Liability, Fair Value, Gross Liability	$6,501		$7,220
[1]	The fair value of the FDIC receivable excludes amortization expected to be recognized in prospective periods.

Estimated_Fair_Values_Narrativ

Estimated Fair Values (Narrative) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Estimated Fair Values [Line Items]	'	'
Total investment securities available for sale, fair value	$5,676,237	$5,387,703
Liability transfers between Level 1 and Level 2	0	'
Asset transfers between Level 1 and Level 2	0	'
Liability transfers between Level 2 and Level 1	0	'
Asset transfers between Level 2 and Level 1	0	'
Fair Value, Measurements, Recurring	'	'
Estimated Fair Values [Line Items]	'	'
Liability measured at fair value on nonrecurring basis	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3	'	'
Estimated Fair Values [Line Items]	'	'
Total investment securities available for sale, fair value	0	0
Fair Value, Measurements, Recurring | Fair Value	'	'
Estimated Fair Values [Line Items]	'	'
Total investment securities available for sale, fair value	$5,676,237	$5,387,703
Minimum	'	'
Estimated Fair Values [Line Items]	'	'
Discounts for collateral value estimates due to estimated holding and selling costs (percent)	10.00%	'
Maximum	'	'
Estimated Fair Values [Line Items]	'	'
Discounts for collateral value estimates due to estimated holding and selling costs (percent)	14.00%	'

Estimated_Fair_Values_Assets_A

Estimated Fair Values (Assets And Liabilities Carried At Fair Value On A Recurring Basis) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	$5,676,237	$5,387,703
Fair Value, Measurements, Recurring | Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	5,676,237	5,387,703
Interest rate swaps accounted for as cash flow hedges	6,501	7,220
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Interest rate swaps accounted for as cash flow hedges	0	0
Fair Value, Measurements, Recurring | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	5,676,237	5,387,703
Interest rate swaps accounted for as cash flow hedges	6,501	7,220
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Interest rate swaps accounted for as cash flow hedges	0	0
Fair Value, Measurements, Recurring | U.S. Treasury | Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	1,273,221	373,437
Fair Value, Measurements, Recurring | U.S. Treasury | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | U.S. Treasury | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	1,273,221	373,437
Fair Value, Measurements, Recurring | U.S. Treasury | Significant Unobservable Inputs (Level 3 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Government Agency | Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	1,812,774	2,544,229
Fair Value, Measurements, Recurring | Government Agency | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Government Agency | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	1,812,774	2,544,229
Fair Value, Measurements, Recurring | Government Agency | Significant Unobservable Inputs (Level 3 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Mortgage Backed Securities, Other [Member] | Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	2,566,666	2,446,873
Fair Value, Measurements, Recurring | Mortgage Backed Securities, Other [Member] | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Mortgage Backed Securities, Other [Member] | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	2,566,666	2,446,873
Fair Value, Measurements, Recurring | Mortgage Backed Securities, Other [Member] | Significant Unobservable Inputs (Level 3 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Other Debt Obligations | Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	830	830
Fair Value, Measurements, Recurring | Other Debt Obligations | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Other Debt Obligations | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	830	830
Fair Value, Measurements, Recurring | Other Debt Obligations | Significant Unobservable Inputs (Level 3 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Equity Securities | Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	22,560	22,147
Fair Value, Measurements, Recurring | Equity Securities | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Equity Securities | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	22,560	22,147
Fair Value, Measurements, Recurring | Equity Securities | Significant Unobservable Inputs (Level 3 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | State, County, Municipal | Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	186	187
Fair Value, Measurements, Recurring | State, County, Municipal | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | State, County, Municipal | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	186	187
Fair Value, Measurements, Recurring | State, County, Municipal | Significant Unobservable Inputs (Level 3 Inputs)	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Investment securities available for sale	$0	$0

Estimated_Fair_Values_Assets_A1

Estimated Fair Values (Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis) (Details) (USD $)	Mar. 31, 2014		Dec. 31, 2013	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'
Not covered under loss share agreements in other real estate owned	$44,504	[1],[2]	$36,898	$44,828	[1]	$43,513
Covered under loss share agreements in other real estate owned	41,855	[1]	47,081	101,901	[1]	102,577
Fair Value, Measurements, Nonrecurring | Fair Value	'		'	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'
Loans held for sale	14,911		29,389	'		'
Impaired loans not covered by loss share agreements	73,301		77,817	'		'
Not covered under loss share agreements in other real estate owned	17,678		20,526	'		'
Covered under loss share agreements in other real estate owned	32,402		37,587	'		'
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	'		'	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'
Loans held for sale	0		0	'		'
Impaired loans not covered by loss share agreements	0		0	'		'
Not covered under loss share agreements in other real estate owned	0		0	'		'
Covered under loss share agreements in other real estate owned	0		0	'		'
Fair Value, Measurements, Nonrecurring | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	'		'	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'
Loans held for sale	14,911		29,389	'		'
Impaired loans not covered by loss share agreements	0		0	'		'
Not covered under loss share agreements in other real estate owned	0		0	'		'
Covered under loss share agreements in other real estate owned	0		0	'		'
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3 Inputs)	'		'	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'
Loans held for sale	0		0	'		'
Impaired loans not covered by loss share agreements	73,301		77,817	'		'
Not covered under loss share agreements in other real estate owned	17,678		20,526	'		'
Covered under loss share agreements in other real estate owned	$32,402		$37,587	'		'
[1]	Text selection found with no content.
[2]	Noncovered additions include $11.6 million from the 1st Financial merger.

Employee_Benefit_Plans_Compone

Employee Benefit Plans (Components Of Pension Expense) (Details) (Defined Benefit Pension, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Defined Benefit Pension	'	'
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'	'
Service cost	$3,381	$4,222
Interest cost	6,556	5,895
Expected return on assets	-7,812	-6,931
Amortization of prior service cost	53	53
Amortization of net actuarial loss	1,546	4,251
Total pension expense	$3,724	$7,490

Employee_Benefit_Plans_Narrati

Employee Benefit Plans (Narrative) (Details) (Defined Benefit Pension)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Defined Benefit Pension	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Assumed discount rate (percent)	4.90%	4.00%
Expected long-term rate of return on plan assets (percent)	7.50%	7.25%
Assumed rate of salary increases (percent)	4.00%	4.00%

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2014
			Commitments to Extend Credit	Commitments to Extend Credit	Standby Letters of Credit	Standby Letters of Credit	Recourse Obligation on Mortgage Loans Sold	Obligation to Repurchase Receivables Sold
Guarantor Obligations [Line Items]	'	'	'	'	'	'	'	'
Unused commitments	'	'	$6,110,000,000	$5,840,000,000	'	'	'	'
Guarantor obligations amount	'	'	'	'	52,300,000	54,800,000	'	'
Reserve for estimated losses arising from repurchase of loans	'	'	'	'	'	'	'	3,600,000
FDIC Indemnification Asset	74,784,000	93,397,000	'	'	'	'	'	'
Recourse Period, Maximum1	'	'	'	'	'	'	'120 days	'
FDIC loss share payable	$111,339,000	$109,378,000	'	'	'	'	'	'

Derivatives_Narrative_Details

Derivatives (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
		2011 Interest Rate Swap	2006 Interest Rate Swap	2009 Interest Rate Swap
Derivative [Line Items]	'	'	'	'
Notional amount of interest rate derivatives	'	$93.50	'	'
Fixed rate payments, interest rate	'	5.50%	'	'
Variable rate payment rate	'	'	1.75%	1.75%
Fair value of collateral pledged to secure interest rate contracts	7	'	'	'
Incremental interest expense paid to interest rate swap counterparties	$0.80	'	'	'

Derivatives_Schedule_Of_Intere

Derivatives (Schedule Of Interest Rate Swaps) (Details) (2011 Interest Rate Swap, USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
2011 Interest Rate Swap	'	'
Derivative [Line Items]	'	'
Estimated fair value of liability	$6,501	$7,220
Derivative, Notional Amount	$93,500	$93,500

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Income) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013		Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss), before Tax	($27,217)		'		($41,434)		'
Deferred tax expense (benefit)	-10,623		'		-16,166		'
Accumulated other comprehensive income (loss), net of tax	-16,594		-79,905		-25,268		-82,106
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	-977	[1]	-2,619	[1]	'		'
Reclassification adjustment for losses included in income before income taxes	1,599		4,304		'		'
Unrealized Gains on Investment Securities Available for Sale	'		'		'		'
Accumulated Other Comprehensive Income (Loss), before Tax	-4,733		'		-16,632		'
Deferred tax expense (benefit)	-1,898		'		-6,541		'
Accumulated other comprehensive income (loss), net of tax	-2,835	[2]	19,606	[2]	-10,091	[2]	20,517	[2]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	[2]	0	[2]	'		'
Funded Status of Defined Benefit Plan	'		'		'		'
Accumulated Other Comprehensive Income (Loss), before Tax	-15,983		'		-17,582		'
Deferred tax expense (benefit)	-6,217		'		-6,839		'
Accumulated other comprehensive income (loss), net of tax	-9,766	[2]	-93,712	[2]	-10,743	[2]	-96,331	[2]
Income taxes	622	[1]	1,685	[1]	'		'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	-977	[1],[2]	-2,619	[1],[2]	'		'
Employee Benefits, prior service costs	-53	[1]	-53	[1]	'		'
Reclassification adjustment for losses included in income before income taxes	-1,546	[1]	-4,251	[1]	'		'
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax	-1,599		-4,304	[1]	'		'
Unrealized Loss on Cash Flow Hedges	'		'		'		'
Accumulated Other Comprehensive Income (Loss), before Tax	-6,501		'		-7,220		'
Deferred tax expense (benefit)	-2,508		'		-2,786		'
Accumulated other comprehensive income (loss), net of tax	-3,993	[2]	-5,799	[2]	-4,434	[2]	-6,292	[2]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$0	[2]	$0	[2]	'		'
[1]	Amounts in parentheses indicate debits to profit/loss.
[2]	All amounts are net of tax. Amounts in parentheses indicate debits.

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Loss (Components of AOCI) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'
Beginning balance	($25,268)		($82,106)
Other comprehensive income before reclassifications	7,697		-418
Amounts reclassified from accumulated other comprehensive loss	977	[1]	2,619	[1]
Net current period other comprehensive income	8,674		2,201
Ending balance	-16,594		-79,905
Unrealized Loss on Cash Flow Hedges	'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'
Beginning balance	-4,434	[2]	-6,292	[2]
Other comprehensive income before reclassifications	441	[2]	493	[2]
Amounts reclassified from accumulated other comprehensive loss	0	[2]	0	[2]
Net current period other comprehensive income	441	[2]	493	[2]
Ending balance	-3,993	[2]	-5,799	[2]
Unrealized Gains on Investment Securities Available for Sale	'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'
Beginning balance	-10,091	[2]	20,517	[2]
Other comprehensive income before reclassifications	7,256	[2]	-911	[2]
Amounts reclassified from accumulated other comprehensive loss	0	[2]	0	[2]
Net current period other comprehensive income	7,256	[2]	-911	[2]
Ending balance	-2,835	[2]	19,606	[2]
Defined Benefit Pension Items	'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'
Beginning balance	-10,743	[2]	-96,331	[2]
Other comprehensive income before reclassifications	0	[2]	0	[2]
Amounts reclassified from accumulated other comprehensive loss	977	[1],[2]	2,619	[1],[2]
Net current period other comprehensive income	977	[2]	2,619	[2]
Ending balance	($9,766)	[2]	($93,712)	[2]
[1]	Amounts in parentheses indicate debits to profit/loss.
[2]	All amounts are net of tax. Amounts in parentheses indicate debits.

Accumulated_Other_Comprehensiv4

Accumulated Other Comprehensive Loss (Reclassifications out of AOCI) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'
Reclassification adjustment for losses included in income before income taxes	$1,599		$4,304
Amounts reclassified from accumulated other comprehensive income, net of tax	977	[1]	2,619	[1]
Unrealized Loss on Cash Flow Hedges	'		'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'
Amounts reclassified from accumulated other comprehensive income, net of tax	0	[2]	0	[2]
Unrealized Gains on Investment Securities Available for Sale	'		'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'
Amounts reclassified from accumulated other comprehensive income, net of tax	0	[2]	0	[2]
Defined Benefit Pension Items	'		'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'
Employee Benefits, prior service costs	-53	[1]	-53	[1]
Reclassification adjustment for losses included in income before income taxes	-1,546	[1]	-4,251	[1]
Total before taxes	-1,599		-4,304	[1]
Income taxes	622	[1]	1,685	[1]
Amounts reclassified from accumulated other comprehensive income, net of tax	$977	[1],[2]	$2,619	[1],[2]
[1]	Amounts in parentheses indicate debits to profit/loss.
[2]	All amounts are net of tax. Amounts in parentheses indicate debits.

Subsequent_Events_Details

Subsequent Events (Details) (Subsequent Event [Member], USD $)	Apr. 29, 2014
Subsequent Event [Member]	'
Subsequent Event [Line Items]	'
Preferred Stock, Shares Authorized	10,000,000
Preferred Stock, Par or Stated Value Per Share	$0.01