First Citizens BancShares (FCNCO) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 07, 2013	Nov. 07, 2013
		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	30-Sep-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'Q3	'	'
Amendment Flag	'false	'	'
Entity Common Stock, Shares Outstanding	'	8,586,058	1,032,883

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'		'
Cash and due from banks	$569,118	[1]	$639,730	[2]
Overnight investments	1,354,131	[1]	443,180	[2]
Investment securities available for sale	5,161,585	[1]	5,226,228	[2]
Investment securities held to maturity	1,013	[1]	1,342	[2]
Loans held for sale	43,054	[1]	86,333	[2]
Loans and leases:	'		'
Acquired	1,188,281	[1]	1,809,235	[2]
Originated	11,884,585	[2]	11,576,115	[2]
Less allowance for loan and lease losses	237,799	[1]	319,018	[2]
Net loans and leases	12,835,067	[1]	13,066,332	[2]
Premises and equipment	868,001	[1]	882,768	[2]
Other real estate owned:	'		'
Covered under loss share agreements in other real estate owned	58,769	[1]	102,577	[2]
Not covered under loss share agreements in other real estate owned	40,338	[1]	43,513	[2]
Income earned not collected	46,110	[1]	47,666	[2]
Receivable from FDIC for loss share agreements	100,553	[1]	270,192	[1]
Goodwill	102,625	[1]	102,625	[2]
Other intangible assets	1,696	[1]	3,556	[2]
Other assets	329,292	[1]	367,610	[2]
Total assets	21,511,352	[1]	21,283,652	[2]
Liabilities	'		'
Noninterest-bearing	5,323,051	[1]	4,885,700	[2]
Interest-bearing	12,740,268	[1]	13,200,325	[2]
Total deposits	18,063,319	[1]	18,086,025	[2]
Debt, Current	604,435	[1]	568,505	[1]
Long-term obligations	510,963	[1]	444,921	[2]
Payable to FDIC for loss share agreements	107,419		101,641
Other liabilities	243,159	[1]	218,553	[2]
Total liabilities	19,529,295	[1]	19,419,645	[2]
Shareholders' Equity	'		'
Surplus	143,766	[1]	143,766	[2]
Retained earnings	1,924,217	[1]	1,792,726	[2]
Accumulated other comprehensive loss	-95,545	[1]	-82,106	[2]
Total shareholders' equity	1,982,057	[1]	1,864,007	[2]
Total liabilities and shareholders' equity	21,511,352	[1]	21,283,652	[2]
Class A Common Stock	'		'
Shareholders' Equity	'		'
Common stock	8,586	[1]	8,588	[2]
Class B Common Stock	'		'
Shareholders' Equity	'		'
Common stock	$1,033	[1]	$1,033	[2]
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
Class A Common Stock	'		'		'
Common stock, par value (in dollars per share)	$1	[1]	$1	[2]	$1	[1]
Common stock, shared authorized	11,000,000	[1]	11,000,000	[2]	11,000,000	[1]
Common stock, shares issued	8,586,058	[1]	8,588,031	[2]	8,628,810	[1]
Common stock, shares outstanding	8,586,058	[1]	8,588,031	[2]	8,628,810	[1]
Class B Common Stock	'		'		'
Common stock, par value (in dollars per share)	$1	[1]	$1	[2]	$1	[1]
Common stock, shared authorized	2,000,000	[1]	2,000,000	[2]	2,000,000	[1]
Common stock, shares issued	1,032,883	[1]	1,032,883	[2]	1,626,937	[1]
Common stock, shares outstanding	1,032,883	[1]	1,032,883	[2]	1,626,937	[1]
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest income	'	'	'	'
Loans and leases	$182,201	$226,812	$579,115	$696,813
Investment securities:	'	'	'	'
U. S. Treasury	392	559	1,355	1,968
Government agency	2,809	3,692	9,203	12,401
Residential mortgage-backed securities	6,415	4,792	15,500	8,883
Corporate bonds	0	278	0	2,319
State, county and municipal	2	6	10	30
Other	78	108	231	301
Total investment securities interest and dividend income	9,696	9,435	26,299	25,902
Overnight investments	737	427	1,750	1,230
Total interest income	192,634	236,674	607,164	723,945
Interest expense	'	'	'	'
Deposits	7,923	13,850	27,233	45,369
Short-term borrowings	744	1,114	2,128	4,089
Long-term obligations	4,784	6,354	14,210	22,747
Total interest expense	13,451	21,318	43,571	72,205
Net interest income	179,183	215,356	563,593	651,740
Provision for loan and lease losses	-7,683	17,623	-39,531	78,005
Net interest income after provision for loan and lease losses	186,866	197,733	603,124	573,735
Noninterest income	'	'	'	'
Cardholder and merchant services	12,791	11,505	35,887	33,540
Merchant Discount Fees	14,887	13,220	42,619	38,332
Service charges on deposit accounts	15,546	15,549	45,428	45,456
Wealth management services	15,112	14,129	44,724	42,414
Fees from processing services	4,539	9,521	15,209	25,640
Securities gains (losses)	0	31	0	-11
Other service charges and fees	4,043	3,377	11,775	10,392
Mortgage income	2,277	1,619	9,734	4,718
Insurance commissions	2,772	2,568	8,146	7,562
ATM income	1,316	1,263	3,798	3,999
Adjustments for FDIC receivable for loss share agreements	-23,298	-16,858	-61,790	-57,788
Other	21,933	-4,082	38,896	1,827
Total noninterest income	71,918	51,842	194,426	156,081
Noninterest expense	'	'	'	'
Salaries and wages	76,463	76,675	228,384	229,145
Employee benefits	21,889	18,741	70,136	59,548
Occupancy expense	18,844	18,860	56,117	55,467
Equipment expense	18,822	17,983	56,466	54,147
FDIC insurance expense	2,706	2,016	7,795	7,739
Foreclosure-related expenses	4,287	7,255	12,059	27,248
Other	49,132	48,547	144,108	134,911
Total noninterest expense	192,143	190,077	575,065	568,205
Income before income taxes	66,641	59,498	222,485	161,611
Income taxes	25,659	19,974	82,012	49,009
Net income	$40,982	$39,524	$140,473	$112,602
Average shares outstanding (in shares)	9,618,941	10,264,159	9,618,955	10,273,082
Net income per share	$4.26	$3.85	$14.60	$10.96

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income	$40,982	$39,524	$140,473	$112,602
Unrealized gains on securities:	'	'	'	'
Change in unrealized securities gains arising during period	3,470	14,783	-36,998	16,376
Deferred tax benefit (expense)	-1,177	-5,949	14,657	-6,582
Reclassification adjustment for losses (gains) included in income before income taxes	0	-31	0	-34
Deferred tax expense (benefit)	0	12	0	13
Total change in unrealized gains on securities, net of tax	2,293	8,815	-22,341	9,773
Change in fair value of cash flow hedges:	'	'	'	'
Change in unrecognized loss on cash flow hedges	-544	-919	26	-2,750
Deferred tax benefit (expense)	214	364	-11	1,086
Reclassification adjustment for gains (losses) included in income before income taxes	831	769	2,463	2,294
Deferred tax benefit	-400	-304	-1,044	-906
Total change in unrecognized loss on cash flow hedges, net of tax	101	-90	1,434	-276
Change in pension obligation:	'	'	'	'
Reclassification adjustment for losses included in income before income taxes	4,298	2,788	12,896	8,368
Deferred tax expense	-2,061	-1,092	-5,428	-3,277
Total change in pension obligation, net of tax	2,237	1,696	7,468	5,091
Net current period other comprehensive income (loss)	4,631	10,421	-13,439	14,588
Total comprehensive income	$45,613	$49,945	$127,034	$127,190

Consolidated_Statements_of_Cha

Consolidated Statements of Changes In Shareholders' Equity (USD $)

Total

Class A Common Stock

Class B Common Stock

Common Stock

Common Stock

Surplus

Surplus

Surplus

Retained Earnings

Retained Earnings

Retained Earnings

Accumulated Other Comprehensive Loss

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 B Common Stock

Class A Common Stock

Class B Common Stock

Class A Common Stock

Class B Common Stock

Beginning balance at Dec. 31, 2011

$1,861,128

'

'

$8,644

$1,640

$143,766

'

'

$1,773,652

'

'

($66,574)

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income

112,602

'

'

0

0

0

'

'

112,602

'

'

0

'

'

Net current period other comprehensive income

14,588

'

'

0

0

0

'

'

0

'

'

14,588

'

'

Repurchase of common stock shares

'

-2,535

-2,414

-15

-13

'

0

0

'

-2,520

-2,401

'

0

0

Cash dividends

-9,245

'

'

0

0

0

'

'

-9,245

'

'

0

'

'

Ending balance at Sep. 30, 2012

1,974,124

'

'

8,629

1,627

143,766

'

'

1,872,088

'

'

-51,986

'

'

Beginning balance at Dec. 31, 2012

1,864,007

[1]

'

'

8,588

1,033

143,766

'

'

1,792,726

'

'

-82,106

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income

140,473

'

'

0

0

0

'

'

140,473

'

'

0

'

'

Net current period other comprehensive income

-13,439

'

'

0

0

0

'

'

0

'

'

-13,439

'

'

Repurchase of common stock shares

'

-321

'

-2

'

'

0

'

'

-319

'

'

0

'

Cash dividends

-8,663

'

'

0

0

0

'

'

-8,663

'

'

0

'

'

Ending balance at Sep. 30, 2013

$1,982,057

[2]

'

'

$8,586

$1,033

$143,766

'

'

$1,924,217

'

'

($95,545)

'

'

[1]

Derived from 2012 Annual Report on Form 10-K.

[2]

Unaudited

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Statement of Stockholders' Equity [Abstract]	'	'
Cash dividends (in dollars per share)	$0.90	$0.90
Class A Common Stock	'	'
Statement of Stockholders' Equity [Abstract]	'	'
Repurchase of common stock (in shares)	1,973	15,497
Class B Common Stock	'	'
Statement of Stockholders' Equity [Abstract]	'	'
Repurchase of common stock (in shares)	0	12,875

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
OPERATING ACTIVITIES	'	'
Net income	$140,473	$112,602
Adjustments to reconcile net income to cash provided by operating activities:	'	'
Provision for loan and lease losses	-39,531	78,005
Deferred tax expense (benefit)	-18,000	5,999
Change in current taxes payable	-37,737	23,051
Depreciation	52,212	50,685
Change in accrued interest payable	-3,302	-12,574
Change in income earned not collected	1,556	-9,349
Gain on sale of other assets	-4,085	0
Securities losses (gains)	0	11
Origination of loans held for sale	-323,665	-415,527
Proceeds from sale of loans held for sale	376,395	433,489
Gain on sale of loans	-9,451	-4,033
Loss on sale of other real estate	4,574	31,070
Net amortization of premiums and discounts	-96,091	-90,461
FDIC receivable for loss share agreements	58,802	-15,240
Net change in other assets	107,757	26,617
Net change in other liabilities	56,440	5,316
Net cash provided by operating activities	266,347	219,661
INVESTING ACTIVITIES	'	'
Net change in loans outstanding	364,916	592,015
Purchases of investment securities available for sale	-1,940,198	-4,241,879
Proceeds from maturities of investment securities held to maturity	329	363
Proceeds from maturities of investment securities available for sale	1,951,735	3,293,188
Proceeds from sales of investment securities available for sale	0	56
Net change in overnight investments	-910,951	-253,221
Cash received from the FDIC for loss share agreements	45,103	223,863
Proceeds from sale of other real estate	120,712	114,357
Additions to premises and equipment	-38,887	-73,616
Net cash (used) provided by investing activities	-407,241	-344,874
FINANCING ACTIVITIES	'	'
Net change in time deposits	-529,675	-756,798
Net change in demand and other interest-bearing deposits	506,969	1,072,739
Net change in short-term borrowings	35,930	62,551
Repayment of long-term obligations	-3,958	-223,779
Origination of long-term obligations	70,000	0
Repurchase of common stock	-321	-4,949
Cash dividends paid	-8,663	-9,245
Net cash provided (used) by financing activities	70,282	140,519
Change in cash and due from banks	-70,612	15,306
Cash and due from banks at beginning of period	639,730	590,801
Cash and due from banks at end of period	569,118	606,107
CASH PAYMENTS FOR:	'	'
Interest	46,873	84,779
Income taxes	99,398	35,208
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:	'	'
Change in unrealized securities gains (losses)	-36,998	16,342
Change in fair value of cash flow hedge	2,489	-456
Change in pension obligation	12,896	8,368
Transfers of loans to other real estate	78,303	117,363
Reclassification	$7,368	$0

Accounting_Policies_and_Basis_

Accounting Policies and Basis of Presentation	9 Months Ended
	Sep. 30, 2013
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.
	On August 28, 2013, BancShares' bank subsidiary, FCB and 1st Financial Services Corporation (1st Financial) announced that they had entered into a definitive merger agreement. The agreement provides for the merger of Hendersonville, N.C.-based 1st Financial and its bank subsidiary, Mountain 1st Bank & Trust Company (Mountain 1st), into FCB. The agreement has been approved by the Boards of Directors of 1st Financial, Mountain 1st and FCB. The transaction is expected to close no later than the first quarter of 2014, subject to the receipt of regulatory approvals, the approval of 1st Financial's shareholders, and other customary closing conditions. Under the terms of the agreement, cash consideration of $10,000 will be split between the U.S. Treasury, which will receive $8,000 of the cash consideration in order for 1st Financial to exit from the federal TARP program, and 1st Financial's common shareholders, who will receive $2,000.
	General
	These consolidated financial statements and notes are presented in accordance with instructions for Form 10-Q 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, 2012.
	BancShares evaluates all subsequent events prior to filing this Form 10-Q.
	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.
	During the third quarter, management reevaluated its fair value leveling methodology and the inputs utilized by the 3rd party pricing services for the current and prior periods. Management concluded that due to the reliance on significant observable inputs, the fair values of its US Treasury, Government agency, and other securities should be classified as level 2 rather than the level 1 previously disclosed. Management also concluded that its equity securities should be classified as level 2 rather than the level 1 previously disclosed due to the inactive nature of the markets in which these securities trade.
	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.
	Goodwill Impairment
	Annual impairment tests are conducted as of July 31 each year. Based on the July 31, 2013, impairment test, management concluded there was no indication of goodwill impairment. In addition to the annual testing requirement, impairment tests are performed if various other events occur including significant adverse changes in the business climate, considering various qualitative and quantitative factors to determine whether impairment exists. There were no such events during the third quarter of 2013.
	Critical Accounting Policies Update
	As discussed below, during the second quarter of 2013, BancShares implemented enhancements to the process to estimate the allowance for loan and lease losses (ALLL) and the reserve for unfunded commitments. Through detailed analysis of historical loss data, the process enhancements enabled allocation of the previously unallocated 'nonspecific' ALLL and a portion of the reserve for unfunded loan commitments to specific loan classes. The enhanced ALLL estimates implicitly include the risk of draws on open lines within each loan class. The remaining reserve for unfunded commitments relates to irrevocable commitments, such as letters of credit and financial guarantees. Other than the modifications described above, the enhancements to the methodology had no material impact on the ALLL.
	For originated commercial loans and leases, BancShares increased the granularity of the historical net loss data used to develop the applicable loss rates by utilizing information that further considers the class of the commercial loan and associated risk rating. For the originated noncommercial segment, BancShares incorporated specific loan class and delinquency status trends into the loss rates. Prior to the second quarter of 2013, management applied a general reserve methodology that estimated commercial loan allowances based upon loss rates by credit grade with the loss rates derived in part from migration analysis among grades and noncommercial allowances based upon loss rates derived primarily from historical losses.
	Management also developed an enhanced qualitative framework for considering economic conditions, loan concentrations and other relevant factors at a loan class level. Prior to the second quarter of 2013, these factors were considered in determining the nonspecific portion of the ALLL, which was not allocated to any specific loan class.
	Management believes that the methodology enhancements will improve the granularity of historical net loss data and the precision of the segment analysis. As a result of the enhanced process to determine the ALLL, management has updated the accounting policy disclosures for the ALLL and the reserve for unfunded commitments.
	Allowance for Loan and Lease Losses
	The ALLL represents management's best estimate of probable credit losses within the loan and lease portfolio at the balance sheet date. Management determines the ALLL based on an ongoing evaluation. This evaluation is inherently subjective because it requires material estimates, including the amount and timing of cash flows expected to be received on acquired loans. Those estimates are susceptible to significant change. Adjustments to the ALLL are recorded with a corresponding entry to provision for loan and lease losses. Loan and lease balances deemed to be uncollectible are charged off against the ALLL. Recoveries of amounts previously charged off are credited to the ALLL.
	Accounting standards require the presentation of certain information at the portfolio segment level, which represents the level at which an entity develops and documents a systematic methodology to determine its ALLL. BancShares evaluates its loan and lease portfolio using three portfolio segments: originated commercial, originated noncommercial and acquired. The originated commercial segment includes commercial construction and land development, commercial mortgage, commercial and industrial, lease financing and other commercial real estate loans, and the related ALLL is calculated based on a risk-based approach as reflected in credit grades assigned to commercial segment loans. The originated noncommercial segment includes noncommercial construction and land development, residential mortgage, revolving mortgage and consumer loans, and the associated ALLL was determined using a delinquency-based approach. The ALLL for acquired loans was determined based on the expected cash flows approach.
	BancShares' methodology for calculating the ALLL includes estimating a general allowance for pools of loans and specific allocations for significant individual credits. The general allowance is based on net historical loan loss experience for homogeneous groups of loans with similar risk characteristics and performance trends. The general allowance estimate also contains qualitative components that allow management to adjust reserves based on historical loan loss experience for changes
	in the economic environment, portfolio trends and other factors. The specific allowance component is determined when management believes that the collectability of an individually reviewed loan has been impaired and a loss is probable. The fair value of impaired loans is based on the present value of expected cash flows, market prices of the loans, if available, or the value of the underlying collateral. Expected cash flows are discounted at the loans' effective interest rates.
	The general allowance considers probable, incurred losses that are inherent within the loan portfolio but have not been specifically identified. Loans are divided into segments for analysis based in part on the risk profile inherent in each segment. Loans are further segmented into classes to appropriately recognize changes in inherent risk. A primary component of determining the general allowance for performing and classified loans not analyzed specifically is the actual loss history of the various classes. Loan loss factors based on historical experience may be adjusted for significant factors that, in management's judgment, affect the collectability of the portfolio at the balance sheet date. For originated commercial loans and leases, management incorporates historical net loss data to develop the applicable loan loss factors by utilizing information that further considers the class of the commercial loan and associated risk rating. For the originated noncommercial segment, management incorporates specific loan class and delinquency status trends into the loan loss factors. Loan loss factors may be adjusted quarterly based on changes in the level of historical net charge-offs and model adjustment parameter updates by management, such as the number of periods included in the calculation of loss factors, loss severity and portfolio attrition.
	The quarterly ALLL evaluation process also includes a qualitative framework that considers economic conditions, composition of the loan portfolio, trends in delinquent and nonperforming loans, historical loss experience by categories of loans, concentrations of credit, changes in lending policies and underwriting standards, regulatory exam results and other factors indicative of potential losses remaining in the portfolio. Management may adjust the ALLL calculated based on historical loan loss factors when assessing changes in the factors in the qualitative framework. The adjustments to the ALLL for the qualitative framework are based on economic data, data analysis of portfolio trends and management judgment. These adjustments are specific to the loan class level. Prior to the second quarter of 2013, a portion of the allowance for loan and lease losses was not allocated to any specific class of loans. This nonspecific portion reflected management's best estimate of the elements of imprecision and estimation risk inherent in the calculation of the overall allowance.
	A loan is considered to be impaired under ASC Topic 310 Receivables when, based upon current information and events, it is probable that BancShares will be unable to collect all amounts due according to the contractual terms of the loan. Originated impaired loans are placed on nonaccrual status. Originated loan relationships rated substandard or worse that are greater than or equal to $500 are reviewed for potential impairment on a quarterly basis. Loans classified as trouble debt restructures (TDRs) are also reviewed for potential impairment. Specific valuation allowances are established or partial charge-offs are recorded on impaired loans for the difference between the loan amount and the estimated fair value.
	Management continuously monitors and actively manages the credit quality of the entire loan portfolio and adjusts the ALLL to an appropriate level. By assessing the probable estimated incurred losses in the loan portfolio on a quarterly basis, management is able to adjust specific and general loss estimates based upon the most recent information available. Future adjustments to the ALLL may be necessary based on changes in economic and other conditions. Additionally, various regulatory agencies, as an integral part of their examination process, periodically review BancShares' ALLL. Such agencies may require the recognition of adjustments to the ALLL based on their judgments of information available to them at the time of their examination. Management considers the established ALLL adequate to absorb probable losses that relate to loans and leases outstanding as of September 30, 2013.
	Each portfolio segment and the classes within those segments are subject to risks that could have an adverse impact on the credit quality of the loan and lease portfolio and the related ALLL. Management has identified the most significant risks as described below that are generally similar among the segments and classes. While the list is not exhaustive, it provides a description of the risks management has determined are the most significant.
	Originated Commercial Loans and Leases
	Each commercial loan or lease is centrally underwritten based primarily upon the customer's ability to generate the required cash flow to service the debt in accordance with the contractual terms and conditions of the loan agreement. A complete understanding of the borrower's business, including the experience and background of the principals, is obtained prior to approval. To the extent that the loan or lease is secured by collateral, which is true for the majority of commercial loans and leases, the likely value of the collateral and what level of strength the collateral brings to the transaction is evaluated. To the extent that the principals or other parties provide personal guarantees, the relative financial strength and liquidity of each guarantor is assessed.
	The significant majority of relationships in the originated commercial segment are assigned credit risk grades based upon an assessment of conditions that affect the borrower's ability to meet contractual obligations under the loan agreement. This process includes reviewing the borrowers' financial information, payment history, credit documentation, public information and other information specific to each borrower. Credit risk grades are reviewed annually, or at any point management becomes aware of information affecting the borrowers' ability to fulfill their obligations. Our risk grading standards are described in Note C.
	The impairment assessment and determination of the related specific reserve for each impaired loan is based on a loan's characteristics. Impairment measurement for loans that are not collateral dependent is based on the present value of expected cash flows discounted at the loan's effective interest rate. Specific valuation allowances are established or partial charge-offs are recorded for the difference between the loan amount and the estimated fair value. Impairment measurement for most real estate loans, particularly when a loan is considered to be a probable foreclosure, is based on the fair value of the underlying collateral. Collateral is appraised and market value, appropriately adjusted for an assessment of the sales and marketing costs as well as the expected holding period, is used to calculate an anticipated fair value.
	General reserves for collective impairment are based on estimated incurred losses related to non-impaired commercial loans and leases as of the balance sheet date. Incurred loss estimates for the originated commercial segment are based on average loss rates, which are estimated using historical experience and current risk mix as indicated by the risk grading process. Incurred loss estimates may be adjusted through a qualitative assessment to reflect current economic conditions and portfolio trends including credit quality, concentrations, aging of the portfolio and significant policy and underwriting changes.
	Common risks to each class of commercial loans include general economic conditions within the markets BancShares serves, as well as risks that are specific to each transaction including demand for products and services, personal events, such as disability or change in marital status, and reductions in the value of collateral. Due to the concentration of loans in the medical, dental and related fields, BancShares is susceptible to risks that governmental actions, including implementation of the Affordable Care Act, will fundamentally alter the medical care industry in the United States.
	In addition to these common risks for the majority of the originated commercial segment, additional risks are inherent in certain classes of originated commercial loans and leases.
	Commercial construction and land development
	Commercial construction and land development loans are highly dependent on the supply and demand for commercial real estate in the markets served by BancShares as well as the demand for newly constructed residential homes and lots that customers are developing. Deterioration in demand could result in decreases in collateral values and could make repayment of the outstanding loans more difficult for customers.
	Commercial mortgage, commercial and industrial and lease financing
	Commercial mortgage loans, commercial and industrial loans and lease financing are primarily dependent on the ability of borrowers to achieve business results consistent with those projected at loan origination resulting in cash flow sufficient to service the debt. To the extent that a customer's business results are significantly unfavorable versus the original projections, the ability for the loan to be serviced on a basis consistent with the contractual terms may be at risk. While these loans and leases are generally secured by real property, personal property, or business assets such as inventory or accounts receivable, it is possible that the liquidation of the collateral will not fully satisfy the obligation.
	Other commercial real estate
	Other commercial real estate loans consist primarily of loans secured by multifamily housing and agricultural loans. The primary risk associated with multifamily loans is the ability of the income-producing property that collateralizes the loan to produce adequate cash flow to service the debt. High unemployment or generally weak economic conditions may result in customers having to provide rental rate concessions to achieve adequate occupancy rates. The performance of agricultural loans is highly dependent on favorable weather, reasonable costs for seed and fertilizer and the ability to successfully market the product at a profitable margin. The demand for these products is also dependent on macroeconomic conditions that are beyond the control of the borrower.
	Originated Noncommercial Loans and Leases
	Each originated noncommercial loan is centrally underwritten using automated credit scoring and analysis tools. These credit scoring tools take into account factors such as payment history, credit utilization, length of credit history, types of credit currently in use and recent credit inquiries. To the extent that the loan is secured by collateral, the likely value of that collateral is evaluated.
	The ALLL for the originated noncommercial segment is primarily calculated on a pool basis using a delinquency-based approach. Estimates of incurred losses are based on historical loss experience and the current risk mix as indicated by prevailing delinquency rates. These estimates may be adjusted through a qualitative assessment to reflect current economic conditions, portfolio trends and other factors. The remaining portion of the ALLL related to the originated noncommercial segment results from loans that are deemed impaired. The impairment assessment and determination of the related specific reserve for each impaired loan is based on a loan's characteristics. Impairment measurement for loans that are not collateral dependent is based on the present value of expected cash flows discounted at the loan's effective interest rate. Specific valuation allowances are established or partial charge-offs are recorded for the difference between the loan amount and the estimated fair value. Impairment measurement for most real estate loans, particularly when a loan is considered to be a probable foreclosure, is based on the fair value of the underlying collateral. Collateral is appraised and market value, appropriately adjusted for an assessment of the sales and marketing costs as well as the expected holding period, is used to calculate an anticipated fair value.
	Common risks to each class of noncommercial loans include risks that are not specific to individual transactions such as general economic conditions within the markets BancShares serves, particularly unemployment and potential declines in real estate values. Personal events such as disability or change in marital status also add risk to noncommercial loans.
	In addition to these common risks for the majority of noncommercial loans, additional risks are inherent in certain classes of noncommercial loans.
	Revolving mortgage
	Revolving mortgage loans are often secured by second liens on residential real estate, thereby making such loans particularly susceptible to declining collateral values. A substantial decline in collateral value could render a second lien position to be effectively unsecured. Additional risks include lien perfection inaccuracies, disputes with first lienholders and uncertainty regarding the customer's performance with respect to the first lien that may further weaken the collateral position. Further, the open-end structure of these loans creates the risk that customers may draw on the lines in excess of the collateral value if there have been significant declines since origination.
	Consumer
	The consumer loan portfolio includes loans secured by personal property such as automobiles, marketable securities, other titled recreational vehicles including boats and motorcycles, as well as unsecured consumer debt. The value of underlying collateral within this class is especially volatile due to potential rapid depreciation in values since date of loan origination, potentially in excess of principal balances.
	Residential mortgage and noncommercial construction and land development
	Residential mortgage and noncommercial construction and land development loans are made to individuals and are typically secured by 1-4 family residential property, undeveloped land and partially developed land in anticipation of pending construction of a personal residence. Significant and rapid declines in real estate values can result in residential mortgage loan borrowers having debt levels in excess of the current market value of the collateral. Noncommercial construction and land development projects can experience delays in completion and cost overruns that exceed the borrower's financial ability to complete the project. Such cost overruns can routinely result in foreclosure of partially completed and unmarketable collateral.
	Acquired loans
	The risks associated with acquired loans are generally consistent with the risks identified for commercial and noncommercial originated loans and the classes of loans within those segments. However, these loans were underwritten by other institutions with weaker lending standards. Additionally, in some cases, collateral for acquired loans is located in regions that have experienced profound erosion of real estate values. Therefore, there exists a significant risk that acquired loans are not adequately supported by borrower cash flow or the values of underlying collateral.
	Reserve for Unfunded Commitments
	The reserve for unfunded commitments represents the estimated probable losses related to unfunded lending commitments, such as letters of credit and financial guarantees. The reserve is calculated in a manner similar to the loans evaluated collectively for impairment, considering the likelihood that the available credit will be utilized as well as the exposure to default. The reserve for unfunded commitments is presented within other liabilities on the consolidated balance sheets, distinct from the ALLL, and adjustments to the reserve for unfunded commitments are included in other noninterest expense in the consolidated statements of income.
	Recent Accounting and Regulatory Pronouncements
	Financial Accounting Standards Board (FASB) Accounting Standards Update (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. Early adoption is permitted.
	The provisions of this ASU will be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. BancShares will adopt this ASU by the date required and does not anticipate that the ASU will have a material effect on its financial position or results of operations.
	FASB ASU 2013-10, “Derivatives and Hedging (Topic 815)"
	This ASU permits the use of the Fed Funds Effective Swap Rate (OIS) by BancShares as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815, in addition to United States Treasury (UST) and London Interbank Offered Rate (LIBOR). The amendments also remove the restriction on using different benchmark rates for similar hedges.
The amendments are effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. Adoption of this ASU during the third quarter of 2013 did not have a material effect on BancShares' financial position or 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 updated guidance requires BancShares to measure those obligations as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement among its co-obligors and any additional amount the reporting entity expects to pay on behalf of its co-obligors. The guidance in this ASU also requires an entity to disclose the nature and amount of the obligation as well as other information about those obligations.
The amendments in this update are effective for fiscal years beginning after December 31, 2013. Early adoption is permitted. BancShares will adopt the methodologies prescribed by this ASU by the date required, and does not anticipate that the ASU will have a material effect on its financial position or results of operations.
FASB ASU 2013-02, “Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income”
This ASU requires BancShares to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required under GAAP to be reclassified to net income in its entirety in the same reporting period. For other amounts, BancShares is required to cross-reference to other disclosures required under GAAP that provide additional detail about those amounts.
For public entities, the amendments are effective prospectively for reporting periods beginning after December 15, 2012. BancShares adopted the methodologies prescribed by this ASU by the date required. Adoption of this ASU did not have a material effect on BancShares' financial position or results of operations. BancShares has included the required disclosures in Note L.
FASB ASU 2013-01, “Balance Sheet”
This ASU clarifies that the scope of ASU No. 2011-11, Disclosures about Offsetting Assets and Liabilities, applies to derivatives including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with Section 210-20-45 or Section 815-10-45 or are subject to a master netting arrangement or similar agreement.
BancShares is required to apply the amendments for fiscal years beginning on or after January 1, 2013, and interim periods within those annual periods. The effective date is the same as the effective date of Update 2011-11. BancShares adopted the methodologies prescribed by this ASU by the date required. Adoption of this ASU did not have a material effect on BancShares' financial position or results of operations.

Investments

Investments	9 Months Ended
	Sep. 30, 2013
Investments [Abstract]	'
Investments	'
	Investments
	The aggregate values of investment securities at September 30, 2013, and December 31, 2012, along with unrealized gains and losses determined on an individual security basis are as follows:
		Cost		Gross		Gross unrealized		Fair
				unrealized		losses		value
				gains
		(dollars in thousands)
	Investment securities available for sale
	September 30, 2013
	U.S. Treasury	$	448,201	$	372	$	41	$	448,532
	Government agency	2,583,888		2,320		1,428		2,584,780
	Mortgage-backed securities	2,131,099		5,452		30,519		2,106,032
	Equity securities	543		20,681		—		21,224
	State, county and municipal	186		1		—		187
	Other	857		—		27		830
	Total investment securities available for sale	$	5,164,774	$	28,826	$	32,015	$	5,161,585
	December 31, 2012
	U.S. Treasury	$	823,241	$	403	$	12	$	823,632
	Government agency	3,052,040		3,501		337		3,055,204
	Mortgage-backed securities	1,315,211		14,787		341		1,329,657
	Equity securities	543		15,822		—		16,365
	State, county and municipal	546		4		—		550
	Other	838		—		18		820
	Total investment securities available for sale	$	5,192,419	$	34,517	$	708	$	5,226,228
	Investment securities held to maturity
	September 30, 2013
	Mortgage-backed securities	$	1,013	$	67	$	—	$	1,080
	December 31, 2012
	Mortgage-backed securities	$	1,342	$	133	$	27	$	1,448
	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.
	The following table provides the maturity distribution for non-amortizing securities. Repayments of mortgage-backed securities are dependent on the repayments of the underlying loan balances. Equity securities do not have a stated maturity date.
		September 30, 2013				December 31, 2012
		Cost		Fair		Cost		Fair
				value				value
		(dollars in thousands)
	Investment securities available for sale
	Amortizing securities maturing in:
	One year or less	$	864,992	$	865,925	$	2,285,159	$	2,286,403
	One through five years	2,168,080		2,168,344		1,590,608		1,592,923
	Five through 10 years	60		60		898		880
	Over 10 years	—		—		—		—
	Mortgage-backed securities	2,131,099		2,106,032		1,315,211		1,329,657
	Equity securities	543		21,224		543		16,365
	Total investment securities available for sale	$	5,164,774	$	5,161,585	$	5,192,419	$	5,226,228
	Investment securities held to maturity
	Mortgage-backed securities held to maturity	$	1,013	$	1,080	$	1,342	$	1,448
	For each period presented, securities gains (losses) include the following:
		Three months ended September 30				Nine months ended September 30
		2013		2012		2013		2012
		(dollars in thousands)
	Gross gains on sales of investment securities available for sale	$	—	$	31	$	—	$	36
	Gross losses on sales of investment securities available for sale	—		—		—		(2		)
	Other than temporary impairment loss on equity securities	—		—		—		(45		)
	Total securities gains (losses)	$	—	$	31	$	—	$	(11	)
	The following table provides information regarding securities with unrealized losses as of September 30, 2013, and December 31, 2012.
		Less than 12 months				12 months or more					Total
		Fair		Unrealized		Fair		Unrealized			Fair		Unrealized
		Value		Losses		Value		Losses			Value		Losses
		(dollars in thousands)
	September 30, 2013
	Investment securities available for sale:
	U.S. Treasury	$	51,836	$	41	$	—	$	—		$	51,836	$	41
	Government agency	953,103		1,428		—		—			953,103		1,428
	Mortgage-backed securities	1,820,909		29,712		27,949		807			1,848,858		30,519
Other	830		27		—		—			830		27
Total	$	2,826,678	$	31,208	$	27,949	$	807		$	2,854,627	$	32,015
Investment securities held to maturity:
Mortgage-backed securities	$	—	$	—	$	—	$	—		$	—	$	—
December 31, 2012
Investment securities available for sale:
U.S. Treasury	$	120,045	$	12	$	—	$	—		$	120,045	$	12
Government agency	407,498		337		—		—			407,498		337
Mortgage-backed securities	135,880		214		9,433		127			145,313		341
Other	820		18		—		—			820		18
Total	$	664,243	$	581	$	9,433	$	127		$	673,676	$	708
Investment securities held to maturity:
Mortgage-backed securities	$	—	$	—	$	17	$	27		$	17	$	27
Investment securities with an aggregate fair value of $27,949 have had continuous unrealized losses for more than 12 months as of September 30, 2013, with an aggregate unrealized loss of $807. These 17 investments are mortgage-backed securities. None of the unrealized losses identified as of September 30, 2013, or December 31, 2012, 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 $2,547,581 at September 30, 2013, and $2,351,072 at December 31, 2012, 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	9 Months Ended
	Sep. 30, 2013
Loans and Leases Receivable Disclosure [Abstract]	'
Loans and Leases	'
	Loans and Leases
	Loans and leases outstanding include the following as of the dates indicated:
		September 30, 2013			December 31, 2012
		(dollars in thousands)
	Acquired loans	$	1,188,281		$	1,809,235
	Originated loans and leases:
	Commercial:
	Construction and land development	300,266			309,190
	Commercial mortgage	6,308,192			6,029,435
	Other commercial real estate	177,599			160,980
	Commercial and industrial	1,009,641			1,038,530
	Lease financing	365,967			330,679
	Other	180,435			125,681
	Total commercial loans	8,342,100			7,994,495
	Noncommercial:
	Residential mortgage	927,426			822,889
	Revolving mortgage	2,113,240			2,210,133
	Construction and land development	121,553			131,992
	Consumer	380,266			416,606
	Total noncommercial loans	3,542,485			3,581,620
	Total originated loans and leases	11,884,585			11,576,115
	Total loans and leases	$	13,072,866		$	13,385,350
		September 30, 2013									December 31, 2012
		Impaired at			All other			Total			Impaired at			All other		Total
		acquisition			acquired loans						acquisition			acquired loans
		date									date
		(dollars in thousands)
	Acquired loans:
	Commercial:
	Construction and land development	$	23,136		$	70,827		$	93,963		$	71,225		$	166,681	$	237,906
	Commercial mortgage	81,389			662,960			744,349			107,281			947,192		1,054,473
	Other commercial real estate	8,713			42,395			51,108			35,369			71,750		107,119
	Commercial and industrial	144			24,304			24,448			3,932			45,531		49,463
	Other	—			1,003			1,003			—			1,074		1,074
	Total commercial loans	113,382			801,489			914,871			217,807			1,232,228		1,450,035
	Noncommercial:
	Residential mortgage	32,389			199,921			232,310			48,077			249,849		297,926
	Revolving mortgage	8,416			26,418			34,834			9,606			29,104		38,710
	Construction and land development	5,145			192			5,337			15,136			5,657		20,793
	Consumer	—			929			929			—			1,771		1,771
	Total noncommercial loans	45,950			227,460			273,410			72,819			286,381		359,200
	Total acquired loans	$	159,332		$	1,028,949		$	1,188,281		$	290,626		$	1,518,609	$	1,809,235
	At September 30, 2013, $2,534,250 in originated loans were pledged to secure debt obligations, compared to $2,570,773 at December 31, 2012.
	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 methods used to monitor each of these loan segments.
	The credit quality indicators for originated commercial loans and leases and all acquired loans and leases are developed through review of individual borrowers on an ongoing basis. Each borrower is evaluated at least annually with more frequent evaluation of more severely criticized loans or leases. 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 not adversely classified because it does not display 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 September 30, 2013, relate to business credit cards and tobacco buyout loans classified as commercial and industrial loans. Business credit card loans with an outstanding balance of $73,701 at September 30, 2013, are subject to automatic charge-off when they become 120 days past due in the same manner as unsecured consumer lines of credit. Tobacco buyout loans with an outstanding balance of $21,808 at September 30, 2013, are secured by assignments of receivables made pursuant to the Fair and Equitable Tobacco Reform Act of 2004. The credit risk associated with these loans is considered low as the payments that began in 2005 and continue through 2014 are made by the Commodity Credit Corporation, which is part of the United States Department of Agriculture.
	The credit quality indicators for originated, noncommercial loans are based on the delinquency status of the borrower. As the borrower becomes more delinquent, the likelihood of loss increases.
	The composition of the loans and leases outstanding at September 30, 2013, and December 31, 2012, by credit quality indicator is provided below:
		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
		(dollars in thousands)
	September 30, 2013
	Pass	$	285,044		$	6,019,286		$	172,341		$	885,691		$	359,195	$	179,085	$	7,900,642
	Special mention	12,060			125,280			1,241			17,260			2,664		1,350		159,855
	Substandard	3,109			155,593			3,709			6,606			3,335		—		172,352
	Doubtful	53			6,703			75			1,428			773		—		9,032
Ungraded	—			1,330			233			98,656			—		—		100,219
Total	$	300,266		$	6,308,192		$	177,599		$	1,009,641		$	365,967	$	180,435	$	8,342,100
December 31, 2012
Pass	$	274,480		$	5,688,541		$	151,549		$	894,998		$	325,626	$	124,083	$	7,459,277
Special mention	14,666			166,882			2,812			13,275			1,601		837		200,073
Substandard	18,761			157,966			5,038			12,073			1,663		756		196,257
Doubtful	952			13,475			98			1,040			771		—		16,336
Ungraded	331			2,571			1,483			117,144			1,018		5		122,552
Total	$	309,190		$	6,029,435		$	160,980		$	1,038,530		$	330,679	$	125,681	$	7,994,495
	Originated noncommercial loans and leases
	Residential			Revolving			Construction			Consumer			Total originated noncommercial
	mortgage			mortgage			and land						loans
							development
	(dollars in thousands)
September 30, 2013
Current	$	900,625		$	2,097,658		$	119,395		$	376,237		$	3,493,915
30-59 days past due	11,840			9,921			1,907			2,502			26,170
60-89 days past due	3,312			1,556			85			1,015			5,968
90 days or greater past due	11,649			4,105			166			512			16,432
Total	$	927,426		$	2,113,240		$	121,553		$	380,266		$	3,542,485
December 31, 2012
Current	$	786,626		$	2,190,186		$	128,764		409,218			$	3,514,794
30-59 days past due	15,711			12,868			1,941			4,405			34,925
60-89 days past due	7,559			3,200			490			1,705			12,954
90 days or greater past due	12,993			3,879			797			1,278			18,947
Total	$	822,889		$	2,210,133		$	131,992		$	416,606		$	3,581,620
	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
	(dollars in thousands)
September 30, 2013
Pass	$	3,373		$	308,809		$	22,007		$	7,553		$	145,735	$	26,291	$	139	$	1,468	$	515,375
Special mention	18,395			176,338			6,602			9,268			8,676		2,865		—		26		222,170
Substandard	62,472			209,383			13,786			5,908			57,156		3,329		4,903		—		356,937
Doubtful	8,013			49,165			8,713			1,502			2,660		2,349		295		—		72,697
Ungraded	1,710			654			—			217			18,083		—		—		438		21,102
Total	$	93,963		$	744,349		$	51,108		$	24,448		$	232,310	$	34,834	$	5,337	$	1,932	$	1,188,281
December 31, 2012
Pass	$	17,010		$	376,974		$	33,570		$	19,451		$	172,165	$	29,540	$	334	$	1,617	$	650,661
Special mention	25,734			259,264			17,518			12,465			14,863		1,736		—		34		331,614
Substandard	105,061			344,542			44,335			14,698			83,193		7,434		17,190		239		616,692
Doubtful	87,445			73,016			11,696			2,757			4,268		—		3,269		117		182,568
Ungraded	2,656			677			—			92			23,437		—		—		838		27,700
Total	$	237,906		$	1,054,473		$	107,119		$	49,463		$	297,926	$	38,710	$	20,793	$	2,845	$	1,809,235
The aging of the outstanding loans and leases, by class, at September 30, 2013, and December 31, 2012, (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 due to various grace periods that allow borrowers to make payments within a stated period after the due date and still remain in compliance with the loan agreement.
	30-59 days			60-89 days			90 days or greater			Total past			Current		Total loans
	past due			past due						due					and leases
	(dollars in thousands)
September 30, 2013
Originated loans and leases:
Construction and land development - commercial	$	1,755		$	49		$	562		$	2,366		$	297,900	$	300,266
Commercial mortgage	15,917			10,522			18,449			44,888			6,263,304		6,308,192
Other commercial real estate	103			400			1,169			1,672			175,927		177,599
Commercial and industrial	2,633			796			1,675			5,104			1,004,537		1,009,641
Lease financing	2,317			—			178			2,495			363,472		365,967
Other	—			—			—			—			180,435		180,435
Residential mortgage	11,840			3,312			11,649			26,801			900,625		927,426
Revolving mortgage	9,921			1,556			4,105			15,582			2,097,658		2,113,240
Construction and land development - noncommercial	1,907			85			166			2,158			119,395		121,553
Consumer	2,502			1,015			512			4,029			376,237		380,266
Total originated loans and leases	$	48,895		$	17,735		$	38,465		$	105,095		$	11,779,490	$	11,884,585
December 31, 2012
Originated loans and leases:
Construction and land development - commercial	$	927		$	—		$	7,878		$	8,805		$	300,385	$	309,190
Commercial mortgage	24,447			4,179			21,327			49,953			5,979,482		6,029,435
Other commercial real estate	387			1,240			1,034			2,661			158,319		160,980
Commercial and industrial	2,833			1,096			605			4,534			1,033,996		1,038,530
Lease financing	991			138			621			1,750			328,929		330,679
Other	18			13			—			31			125,650		125,681
Residential mortgage	15,711			7,559			12,993			36,263			786,626		822,889
Revolving mortgage	12,868			3,200			3,879			19,947			2,190,186		2,210,133
Construction and land development - noncommercial	1,941			490			797			3,228			128,764		131,992
Consumer	4,405			1,705			1,278			7,388			409,218		416,606
Total originated loans and leases	$	64,528		$	19,620		$	50,412		$	134,560		$	11,441,555	$	11,576,115
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 September 30, 2013, and December 31, 2012, (excluding loans and leases acquired with deteriorated credit quality) are as follows:
	September 30, 2013						December 31, 2012
	Nonaccrual			Loans and			Nonaccrual			Loans and
	loans and			leases > 90			loans and			leases > 90
	leases			days and			leases			days and
				accruing						accruing
	(dollars in thousands)
Originated loans and leases:
Construction and land development - commercial	$	493		$	164		$	14,930		$	541
Commercial mortgage	44,818			601			50,532			1,671
Commercial and industrial	2,978			238			6,972			466
Lease financing	1,000			69			1,075			—
Other commercial real estate	1,937			800			2,319			—
Construction and land development - noncommercial	463			166			668			111
Residential mortgage	15,119			2,708			12,603			3,337
Revolving mortgage	—			4,105			—			3,877
Consumer	32			512			746			1,269
Total originated loans and leases	$	66,840		$	9,363		$	89,845		$	11,272
Acquired Loans
The following table provides changes in the carrying value of acquired loans impaired at acquisition date and all other acquired loans during the nine months ended September 30, 2013, and 2012:
	2013						2012
	Impaired at			All other			Impaired at			All other
	acquisition			acquired loans			acquisition			acquired loans
	date						date
	(dollars in thousands)
Balance, January 1	$	290,626		$	1,518,609		$	458,305		$	1,903,847
Reductions for repayments, foreclosures and changes in carrying value, net of accretion	(131,294		)	(489,660		)	(167,581		)	(297,474		)
Balance, September 30	$	159,332		$	1,028,949		$	290,724		$	1,606,373
Outstanding principal balance at September 30	$	670,256		$	1,412,617		$	1,077,975		$	2,253,660
The carrying value of loans on the cost recovery method was $29,194 at September 30, 2013, and $74,479 at December 31, 2012. Prior to the third quarter of 2012, the cost recovery method was being applied to nonperforming loans acquired from four of the six FDIC-assisted transactions. During the third and fourth quarters of 2012, those loans were installed on an acquired loan accounting system that estimated cash flows for all loans. Based on these improved cash flow estimates, loans that were previously accounted for under the cost recovery method began to accrete yield. The cost recovery method continues to be applied to loans when the timing of the cash flows is no longer reasonably estimable due to subsequent nonperformance by the borrower or uncertainty in the ultimate disposition of the asset.
For acquired loans, improved cash flow estimates and receipt of unscheduled loan payments result in the reclassification of nonaccretable difference to accretable yield. During the third and fourth quarters of 2012, the improved ability to estimate cash flows due to expanded use of an acquired loan accounting system also contributed to significant increases in accretable yield. Accretable yield resulting from the improved ability to estimate future cash flows generally does not represent amounts previously identified as nonaccretable difference.
The following table documents changes to the amount of accretable yield for the first nine months of 2013 and 2012. Other, net includes reclassifications from nonaccretable difference to accretable yield and changes to accretable yield attributable to revised cash flow estimates.
	2013			2012
	(dollars in thousands)
Balance, January 1	$	539,564		$	276,690
Accretion	(179,792		)	(193,438		)
Other, net	107,300			498,874
Balance, September 30	$	467,072		$	582,126

Allowance_for_Loan_and_Lease_L

Allowance for Loan and Lease Losses	9 Months Ended
	Sep. 30, 2013
Allowance for Loan and Lease Losses, Adjustments, Net [Abstract]	'
Allowance for Loan and Lease Losses	'
	The following tables provide information on originated impaired loans and leases, exclusive of loans and leases evaluated collectively as a homogeneous group, including interest income recognized in the period during which the loans and leases were considered impaired.
		With a			With no				Total				Unpaid				Related
		recorded			recorded								principal				allowance
		allowance			allowance								balance				recorded
		(dollars in thousands)
	September 30, 2013
	Impaired originated loans and leases
	Construction and land development - commercial	$	1,941		$	349			$	2,290			$	7,364			$	435
	Commercial mortgage	71,829			44,393				116,222				120,254				8,506
	Other commercial real estate	1,210			1,625				2,835				3,131				133
	Commercial and industrial	10,911			371				11,282				11,512				2,500
	Lease financing	309			—				309				309				177
	Other	—			—				—				—				—
	Residential mortgage	11,652			2,681				14,333				14,534				1,113
	Revolving mortgage	4,888			1,607				6,495				6,495				1,167
	Construction and land development - noncommercial	475			463				938				938				52
	Consumer	1,212			—				1,212				1,212				133
	Nonspecific	—			—				—				—				—
	Total impaired originated loans and leases	$	104,427		$	51,489			$	155,916			$	165,749			$	14,216
	December 31, 2012
	Impaired originated loans and leases
	Construction and land development - commercial	$	6,960		$	10,115			$	17,075			$	31,879			$	2,469
	Commercial mortgage	61,644			72,160				133,804				123,964				11,697
	Other commercial real estate	1,552			1,823				3,375				3,348				298
	Commercial and industrial	11,248			11,371				22,619				9,583				2,133
	Lease financing	723			81				804				746				202
	Other	53			654				707				707				53
	Residential mortgage	11,596			4,240				15,836				13,978				959
	Revolving mortgage	1,238			2,965				4,203				4,203				1
	Construction and land development - noncommercial	1,162			159				1,321				1,321				287
	Consumer	1,609			900				2,509				2,509				256
	Nonspecific	—			—				—				—				—
	Total impaired originated loans and leases	$	97,785		$	104,468			$	202,253			$	192,238			$	18,355
	At September 30, 2013, acquired loans that have had an adverse change in expected cash flows since the date of acquisition equaled $514,166, for which $59,517 in related allowance for loan losses has been recorded.
		YTD			YTD Interest Income Recognized
		Average
		Balance
		(dollars in thousands)
	Nine months ended September 30, 2013
	Originated impaired loans and leases:
	Construction and land development - commercial	$	7,793		$	242
	Commercial mortgage	107,929			4,413
	Other commercial real estate	2,893			121
	Commercial and industrial	13,811			533
	Lease financing	399			19
	Other	—			—
	Residential mortgage	15,441			253
	Revolving mortgage	6,337			459
	Construction and land development - noncommercial	907			39
	Consumer	1,508			33
	Total originated impaired loans and leases	$	157,018		$	6,112
	Three months ended September 30, 2013
	Originated impaired loans and leases:
	Construction and land development - commercial	$	5,553		$	29
	Commercial mortgage	117,584			1,575
	Other commercial real estate	2,852			39
	Commercial and industrial	12,136			127
	Lease financing	312			5
	Other	—			—
	Residential mortgage	15,137			181
	Revolving mortgage	6,564			47
	Construction and land development - noncommercial	943			14
	Consumer	1,253			4
Total originated impaired loans and leases	$	162,334		$	2,021
Nine months ended September 30, 2012
Originated impaired loans and leases:
Construction and land development - commercial	$	24,595		$	756
Commercial mortgage	90,544			3,621
Other commercial real estate	2,502			83
Commercial and industrial	11,847			682
Lease financing	412			22
Other	327			—
Residential mortgage	15,278			536
Revolving mortgage	2,507			40
Construction and land development - noncommercial	3,017			122
Consumer	1,631			23
Total originated impaired loans and leases	$	152,660		$	5,885
Three months ended September 30, 2012
Originated impaired loans and leases:
Construction and land development - commercial	$	24,046		$	239
Commercial mortgage	100,751			1,332
Other commercial real estate	2,191			33
Commercial and industrial	13,414			186
Lease financing	689			11
Other	734			—
Residential mortgage	16,111			206
Revolving mortgage	3,592			20
Construction and land development - noncommercial	3,012			33
Consumer	1,978			7
Total originated impaired loans and leases	$	166,518		$	2,067
Allowance for Loan and Lease Losses
Activity in the allowance for loan and lease losses, ending balances of loans and leases and related allowance by class of loans is summarized as follows:
	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
	(dollars in thousands)
Originated Loans
Allowance for loan and lease losses:
Nine months ended September 30, 2013
Balance at January 1	$	6,031		$	80,229			$	2,059			$	14,050			$	3,521		$	1,175		$	3,836		$	25,185		$	1,721		$	25,389		$	15,850		$	179,046
Reclassification (1)	5,141			27,421				(815		)		7,551				(253		)	(1,288		)	5,717			(9,838		)	(478		)	(10,018		)	(15,772		)	7,368
Charge-offs	(4,570		)	(1,662		)		(77		)		(3,917		)		(123		)	(6		)	(1,987		)	(4,540		)	(304		)	(7,601		)	—			(24,787		)
Recoveries	722			740				75				1,003				90			1			353			462			180			1,850			—			5,476
Provision	3,259			(7,695		)		(207		)		3,951				1,358			307			2,126			4,546			(571		)	4,183			(78		)	11,179
Balance at September 30	$	10,583		$	99,033			$	1,035			$	22,638			$	4,593		$	189		$	10,045		$	15,815		$	548		$	13,803		$	—		$	178,282
Nine months ended September 30, 2012
Balance at January 1	$	5,467		$	67,486			$	2,169			$	23,723			$	3,288		$	1,315		$	8,879		$	27,045		$	1,427		$	25,962		$	14,122		$	180,883
Charge-offs	(9,504		)	(5,448		)		(254		)		(3,766		)		(335		)	(28		)	(3,381		)	(7,885		)	(914		)	(7,590		)	—			(39,105		)
Recoveries	370			1,230				6				616				75			4			433			501			168			1,366			—			4,769
Provision	10,134			18,168				318				(6,937		)		419			(115		)	1,255			6,726			1,441			6,944			1,147			39,500
Balance at September 30	$	6,467		$	81,436			$	2,239			$	13,636			$	3,447		$	1,176		$	7,186		$	26,387		$	2,122		$	26,682		$	15,269		$	186,047
Three months ended September 30, 2013
Balance at July 1	$	11,732		$	104,842			$	1,057			$	19,309			$	4,992		$	360		$	9,996		$	14,997		$	720		$	13,777		$	—		$	181,782
Reclassification (1)	—			—				—				—				—			—			—			—			—			—			—			—
Charge-offs	(3,030		)	(794		)		(5		)		(1,671		)		(31		)	—			(719		)	(1,472		)	(59		)	(2,445		)	—			(10,226		)
Recoveries	84			241				39				344				71			—			253			84			101			577			—			1,794
Provision	1,797			(5,256		)		(56		)		4,656				(439		)	(171		)	515			2,206			(214		)	1,894			—			4,932
Balance at September 30	$	10,583		$	99,033			$	1,035			$	22,638			$	4,593		$	189		$	10,045		$	15,815		$	548		$	13,803		$	—		$	178,282
Three months ended September 30, 2012
Balance at July 1	$	5,056		$	81,573			$	2,413			$	14,308			$	3,515		$	1,183		$	7,639		$	26,700		$	1,815		$	24,988		$	15,942		$	185,132
Charge-offs	(283		)	(1,428		)		—				(720		)		—			—			(1,090		)	(1,613		)	(239		)	(2,307		)	—			(7,680		)
Recoveries	101			222				6				179				27			—			121			87			16			439			—			1,198
Provision	1,593			1,069				(180		)		(131		)		(95		)	(7		)	516			1,213			530			3,562			(673		)	7,397
Balance at September 30	$	6,467		$	81,436			$	2,239			$	13,636			$	3,447		$	1,176		$	7,186		$	26,387		$	2,122		$	26,682		$	15,269		$	186,047
(1) Reclassification results from enhancements to the ALLL calculation during the second quarter of 2013 that resulted in the allocation of $15,772 previously designated as 'non-specific' to other loan classes and the absorption of $7,368 of the reserve for unfunded commitments related to unfunded, revocable loan commitments into the ALLL. Further discussion is contained in Note A.
	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
	(dollars in thousands)
Allowance for loan and lease losses:
September 30, 2013
ALLL for loans and leases individually evaluated for impairment	$	435		$	8,506			$	133			$	2,500			$	177		$	—		$	1,113		$	1,167		$	52		$	133		$	—		$	14,216
ALLL for loans and leases collectively evaluated for impairment	10,148			90,527				902				20,138				4,416			189			8,932			14,648			496			13,670			—			164,066
Total allowance for loan and lease losses	$	10,583		$	99,033			$	1,035			$	22,638			$	4,593		$	189		$	10,045		$	15,815		$	548		$	13,803		$	—		$	178,282
December 31, 2012
ALLL for loans and leases individually evaluated for impairment	$	2,469		$	11,697			$	298			$	2,133			$	202		$	53		$	959		$	1		$	287		$	256		$	—		$	18,355
ALLL for loans and leases collectively evaluated for impairment	3,562			68,532				1,761				11,917				3,319			1,122			2,877			25,184			1,434			25,133			—			144,841
Nonspecific ALLL	—			—				—				—				—			—			—			—			—			—			15,850			15,850
Total allowance for loan and lease losses	$	6,031		$	80,229			$	2,059			$	14,050			$	3,521		$	1,175		$	3,836		$	25,185		$	1,721		$	25,389		$	15,850		$	179,046
Loans and leases:
September 30, 2013
Loans and leases individually evaluated for impairment	$	2,290		$	116,222			$	2,835			$	11,282			$	309		$	—		$	14,333		$	6,495		$	938		$	1,212		$	—		$	155,916
Loans and leases collectively evaluated for impairment	297,976			6,191,970				174,764				998,359				365,658			180,435			913,093			2,106,745			120,615			379,054			—			11,728,669
Total loan and leases	$	300,266		$	6,308,192			$	177,599			$	1,009,641			$	365,967		$	180,435		$	927,426		$	2,113,240		$	121,553		$	380,266		$	—		$	11,884,585
December 31, 2012
Loans and leases individually evaluated for impairment	$	17,075		$	133,804			$	3,375			$	22,619			$	804		$	707		$	15,836		$	4,203		$	1,321		$	2,509		$	—		$	202,253
Loans and leases collectively evaluated for impairment	292,115			5,895,631				157,605				1,015,911				329,875			124,974			807,053			2,205,930			130,671			414,097			—			11,373,862
Total loan and leases	$	309,190		$	6,029,435			$	160,980			$	1,038,530			$	330,679		$	125,681		$	822,889		$	2,210,133		$	131,992		$	416,606		$	—		$	11,576,115
	Construction			Commercial				Other				Commercial				Lease			Residential			Revolving			Construction			Consumer			Total
	and land			mortgage				commercial				and				financing			mortgage			mortgage			and land			and other
	development -							real estate				industrial													development -
	commercial																								noncommercial
	(dollars in thousands)
Acquired Loans
Allowance for loan and lease losses:
Nine months ended September 30, 2013
Balance at January 1	$	31,186		$	50,275			$	11,234			$	8,897			$	—		$	19,837		$	9,754		$	8,287		$	502		$	139,972
Charge-offs	(3,435		)	(10,146		)		(6,622		)		(5,190		)		—			(1,973		)	—			—			(2,379		)	(29,745		)
Recoveries	—			—				—				—				—			—			—			—			—			—
Provision	(25,132		)	(10,809		)		(2,689		)		2,067				—			(3,546		)	(4,918		)	(7,739		)	2,056			(50,710		)
Balance at September 30	$	2,619		$	29,320			$	1,923			$	5,774			$	—		$	14,318		$	4,836		$	548		$	179		$	59,517
Nine months ended September 30, 2012
Balance at January 1	$	16,693		$	39,557			$	16,862			$	5,500			$	13		$	5,433		$	77		$	4,652		$	474		$	89,261
Charge-offs	(6,460		)	(18,396		)		(831		)		(7,916		)		—			(3,431		)	—			(301		)	(66		)	(37,401		)
Recoveries	—			—				—				—				—			142			—			—			—			142
Provision	7,502			19,983				(11,477		)		6,125				(13		)	7,366			5,417			2,577			1,025			38,505
Balance at September 30	$	17,735		$	41,144			$	4,554			$	3,709			$	—		$	9,510		$	5,494		$	6,928		$	1,433		$	90,507
Three months ended September 30, 2013
Balance at July 1	$	7,589		$	33,588			$	4,596			$	5,936			$	—		$	17,272		$	6,031		$	1,232		$	290		$	76,534
Charge-offs	(1,263		)	(2,324		)		—				(89		)		—			(509		)	—			(217		)	—			(4,402		)
Recoveries	—			—				—				—				—			—			—			—			—			—
Provision	(3,707		)	(1,944		)		(2,673		)		(73		)		—			(2,445		)	(1,195		)	(467		)	(111		)	(12,615		)
Balance at September 30	$	2,619		$	29,320			$	1,923			$	5,774			$	—		$	14,318		$	4,836		$	548		$	179		$	59,517
Three months ended September 30, 2012
Balance at July 1	$	15,983		$	35,991			$	9,194			$	14,724			$	—		$	5,575		$	2,548		$	3,780		$	2		$	87,797
Charge-offs	(1,434		)	(3,006		)		(34		)		(1,901		)		—			(819		)	—			(292		)	(30		)	(7,516		)
Recoveries	—			—				—				—				—			—			—			—			—			—
Provision	3,186			8,159				(4,606		)		(9,114		)		—			4,754			2,946			3,440			1,461			10,226
Balance at September 30	$	17,735		$	41,144			$	4,554			$	3,709			$	—		$	9,510		$	5,494		$	6,928		$	1,433		$	90,507
Allowance for loan and lease losses:
September 30, 2013
ALLL for loans and leases acquired with deteriorated credit quality	$	2,619		$	29,320			$	1,923			$	5,774			$	—		$	14,318		$	4,836		$	548		$	179		$	59,517
December 31, 2012
ALLL for loans and leases acquired with deteriorated credit quality	31,186			50,275				11,234				8,897				—			19,837			9,754			8,287			502			139,972
Loans and leases:
September 30, 2013
Loans and leases acquired with deteriorated credit quality	93,963			744,349				51,108				24,448				—			232,310			34,834			5,337			1,932			1,188,281
December 31, 2012
Loans and leases acquired with deteriorated credit quality	237,906			1,054,473				107,119				49,463				—			297,926			38,710			20,793			2,845			1,809,235
The following tables provide information on originated impaired loans and leases, exclusive of loans and leases evaluated collectively as a homogeneous group, including interest income recognized in the period during which the loans and leases were considered impaired.
	With a			With no				Total				Unpaid				Related
	recorded			recorded								principal				allowance
	allowance			allowance								balance				recorded
	(dollars in thousands)
September 30, 2013
Impaired originated loans and leases
Construction and land development - commercial	$	1,941		$	349			$	2,290			$	7,364			$	435
Commercial mortgage	71,829			44,393				116,222				120,254				8,506
Other commercial real estate	1,210			1,625				2,835				3,131				133
Commercial and industrial	10,911			371				11,282				11,512				2,500
Lease financing	309			—				309				309				177
Other	—			—				—				—				—
Residential mortgage	11,652			2,681				14,333				14,534				1,113
Revolving mortgage	4,888			1,607				6,495				6,495				1,167
Construction and land development - noncommercial	475			463				938				938				52
Consumer	1,212			—				1,212				1,212				133
Nonspecific	—			—				—				—				—
Total impaired originated loans and leases	$	104,427		$	51,489			$	155,916			$	165,749			$	14,216
December 31, 2012
Impaired originated loans and leases
Construction and land development - commercial	$	6,960		$	10,115			$	17,075			$	31,879			$	2,469
Commercial mortgage	61,644			72,160				133,804				123,964				11,697
Other commercial real estate	1,552			1,823				3,375				3,348				298
Commercial and industrial	11,248			11,371				22,619				9,583				2,133
Lease financing	723			81				804				746				202
Other	53			654				707				707				53
Residential mortgage	11,596			4,240				15,836				13,978				959
Revolving mortgage	1,238			2,965				4,203				4,203				1
Construction and land development - noncommercial	1,162			159				1,321				1,321				287
Consumer	1,609			900				2,509				2,509				256
Nonspecific	—			—				—				—				—
Total impaired originated loans and leases	$	97,785		$	104,468			$	202,253			$	192,238			$	18,355
At September 30, 2013, acquired loans that have had an adverse change in expected cash flows since the date of acquisition equaled $514,166, for which $59,517 in related allowance for loan losses has been recorded.
	YTD			YTD Interest Income Recognized
	Average
	Balance
	(dollars in thousands)
Nine months ended September 30, 2013
Originated impaired loans and leases:
Construction and land development - commercial	$	7,793		$	242
Commercial mortgage	107,929			4,413
Other commercial real estate	2,893			121
Commercial and industrial	13,811			533
Lease financing	399			19
Other	—			—
Residential mortgage	15,441			253
Revolving mortgage	6,337			459
Construction and land development - noncommercial	907			39
Consumer	1,508			33
Total originated impaired loans and leases	$	157,018		$	6,112
Three months ended September 30, 2013
Originated impaired loans and leases:
Construction and land development - commercial	$	5,553		$	29
Commercial mortgage	117,584			1,575
Other commercial real estate	2,852			39
Commercial and industrial	12,136			127
Lease financing	312			5
Other	—			—
Residential mortgage	15,137			181
Revolving mortgage	6,564			47
Construction and land development - noncommercial	943			14
Consumer	1,253			4
Total originated impaired loans and leases	$	162,334		$	2,021
Nine months ended September 30, 2012
Originated impaired loans and leases:
Construction and land development - commercial	$	24,595		$	756
Commercial mortgage	90,544			3,621
Other commercial real estate	2,502			83
Commercial and industrial	11,847			682
Lease financing	412			22
Other	327			—
Residential mortgage	15,278			536
Revolving mortgage	2,507			40
Construction and land development - noncommercial	3,017			122
Consumer	1,631			23
Total originated impaired loans and leases	$	152,660		$	5,885
Three months ended September 30, 2012
Originated impaired loans and leases:
Construction and land development - commercial	$	24,046		$	239
Commercial mortgage	100,751			1,332
Other commercial real estate	2,191			33
Commercial and industrial	13,414			186
Lease financing	689			11
Other	734			—
Residential mortgage	16,111			206
Revolving mortgage	3,592			20
Construction and land development - noncommercial	3,012			33
Consumer	1,978			7
Total originated impaired loans and leases	$	166,518		$	2,067
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 consider. 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 are not initially considered to be TDRs. The following table provides a summary of total TDRs by accrual status.
	September 30, 2013											December 31, 2012
	Accruing			Nonaccruing				Total				Accruing				Nonaccruing			Total
	(dollars in thousands)
Commercial loans
Construction and land development - commercial	$	24,394		$	2,505			$	26,899			$	47,368			$	26,920		$	74,288
Commercial mortgage	105,775			26,669				132,444				151,728				37,603			189,331
Other commercial real estate	3,548			1,330				4,878				10,137				2,194			12,331
Commercial and industrial	10,364			894				11,258				10,940				7,237			18,177
Lease	148			—				148				224				—			224
Total commercial loans	144,229			31,398				175,627				220,397				73,954			294,351
Noncommercial
Residential	24,913			3,996				28,909				28,777				5,828			34,605
Revolving mortgage	3,058			—				3,058				48				—			48
Construction and land development - noncommercial	476			463				939				1,657				—			1,657
Consumer and other	1,212			—				1,212				2,509				—			2,509
Total noncommercial loans	29,659			4,459				34,118				32,991				5,828			38,819
Total loans	$	173,888		$	35,857			$	209,745			$	253,388			$	79,782		$	333,170
Total troubled debt restructurings at September 30, 2013, equaled $209,745, of which $114,231 were acquired and $95,514 were originated. TDRs at December 31, 2012, totaled $333,170, which consisted of $193,207 acquired and $139,963 that were originated.
The majority of TDRs are included in the special mention, substandard or doubtful grading categories, which results in more elevated loss expectations when determining the expected cash flows that are used to determine the allowance for loan losses associated with these loans. 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. Further, TDRs over $500 and graded substandard or lower are evaluated individually for impairment through review of collateral values.
The following tables provide the types of TDRs made during the three months ended September 30, 2013, and 2012, as well as a summary of loans that were modified as a TDR during the 12 months ended September 30, 2013, and 2012 that subsequently defaulted during the three months ended September 30, 2013, and 2012. BancShares defines payment default as movement of the TDR to nonaccrual status, foreclosure or charge-off, whichever occurs first.
.
	Three months ended September 30, 2013									Three months ended September 30, 2012
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
	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
	(dollars in thousands)
Originated loans
Interest only period provided
Commercial mortgage	—	$	—		—	$	—			3	$	1,009			—	$	—
Commercial and industrial	1	203			—	—				2	580				—	—
Total interest only	1	203			—	—				5	1,589				—	—
Loan term extension
Commercial mortgage	5	2,372			4	1,303				10	3,505				4	1,220
Commercial and industrial	—	—			—	—				2	513				—	—
Residential mortgage	2	590			—	—				2	133				—	—
Consumer	1	21			—	—				1	22				—	—
Total loan term extension	8	2,983			4	1,303				15	4,173				4	1,220
Below market interest rate
Construction and land development - commercial	1	45			—	—				—	—				—	—
Commercial mortgage	4	859			5	5,125				3	1,385				—	—
Commercial and industrial	—	—			1	173				1	113				—	—
Residential mortgage	1	319			—	—				1	8				—	—
Revolving mortgage	3	43			1	73				—	—				—	—
Construction & land development - noncommercial	2	42			—	—				—	—				—	—
Total below market interest rate	11	1,308			7	5,371				5	1,506				—	—
Discharged from bankruptcy
Residential mortgage	—	—			2	44				—	—				—	—
Revolving mortgage	3	125			2	47				—	—				—	—
Total discharged from bankruptcy	3	125			4	91				—	—				—	—
Total originated restructurings	23	$	4,619		15	$	6,765			25	$	7,268			4	$	1,220
	Three months ended September 30, 2013									Three months ended September 30, 2012
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
	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
	(dollars in thousands)
Acquired loans
Interest only period provided
Construction and land development - commercial	—	$	—		1	$	2,628			1	$	336			1	$	336
Commercial mortgage	—	—			—	—				3	3,822				1	159
Total interest only	—	—			1	2,628				4	4,158				2	495
Loan term extension
Commercial mortgage	1	157			—	—				—	—				—	—
Commercial and industrial	1	121			—	—				1	118				—	—
Residential mortgage	—	—			1	198				3	5,078				1	4,606
Total loan term extension	2	278			1	198				4	5,196				1	4,606
Below market interest rate
Construction and land development - commercial	—	—			2	1,067				2	52				—	—
Commercial mortgage	1	291			2	1,290				5	3,173				1	1,015
Commercial and industrial	—	—			—	—				1	1,137				—	—
Residential mortgage	—	—			4	842				10	170				4	11
Total below market interest rate	1	291			8	3,199				18	4,532				5	1,026
Total acquired restructurings	3	$	569		10	$	6,025			26	$	13,886			8	$	6,127
For the three months ended September 30, 2013, the recorded investment in troubled debt restructurings 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 the types of TDRs made during the nine months ended September 30, 2013, and 2012, as well as a summary of loans that were modified as a TDR during the 12 months ended September 30, 2013, and 2012 that subsequently defaulted during the
nine months ended September 30, 2013, and 2012. BancShares defines payment default as movement of the TDR to nonaccrual status, foreclosure or charge-off, whichever occurs first.
	Nine months ended September 30, 2013									Nine months ended September 30, 2012
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
	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
	(dollars in thousands)
Originated loans
Interest only period provided
Construction and land development - commercial	—	$	—		—	$	—			2	$	316			—	$	—
Commercial mortgage	9	3,242			—	—				12	4,562				2	952
Commercial and industrial	2	403			—	—				2	580				—	—
Other commercial real estate	1	98			—	—				—	—				—	—
Residential mortgage	1	630			—	—				1	338				1	338
Total interest only	13	4,373			—	—				17	5,796				3	1,290
Loan term extension
Construction and land development - commercial	—	—			—	—				2	7,606				—	—
Commercial mortgage	12	4,935			5	1,524				45	16,314				10	3,389
Other commercial real estate	—	—			—	—				3	1,334				—	—
Commercial and industrial	2	623			—	—				10	1,371				3	150
Lease financing	—	—			—	—				3	172				—	—
Residential mortgage	9	879			1	570				7	493				1	47
Construction and land development - noncommercial	—	—			—	—				1	1,701				—	—
Consumer	2	64			—	—				6	1,124				—	—
Total loan term extension	25	6,501			6	2,094				77	30,115				14	3,586
Below market interest rate
Construction and land development - commercial	2	265			—	—				1	228				—	—
Commercial mortgage	29	10,248			5	5,125				7	5,462				—	—
Commercial and industrial	4	829			1	173				4	226				—	—
Other commercial real estate	3	738			—	—				—	—				—	—
Residential mortgage	14	826			—	—				10	1,853				3	785
Revolving mortgage	6	215			1	73				1	49				1	49
Construction & land development - noncommercial	4	555			—	—				—	—				—	—
Consumer	3	227			—	—				2	11				—	—
Total below market interest rate	65	13,903			7	5,371				25	7,829				4	834
Discharged from bankruptcy
Residential mortgage	4	130			2	44				—	—				—	—
Revolving mortgage	31	2,520			2	47				—	—				—	—
Total discharged from bankruptcy	35	2,650			4	91				—	—				—	—
Other concession
Commercial mortgage	—	—			—	—				2	924				—	—
Residential mortgage	—	—			—	—				1	385				—	—
Total other concession	—	—			—	—				3	1,309				—	—
Total originated restructurings	138	$	27,427		17	$	7,556			122	$	45,049			21	$	5,710
	Nine months ended September 30, 2013									Nine months ended September 30, 2012
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
	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
	(dollars in thousands)
Acquired loans
Interest only period provided
Construction and land development - commercial	1	$	2,628		1	$	2,628			2	$	474			1	$	336
Commercial mortgage	2	1,060			2	1,990				4	12,317				1	159
Commercial and industrial	1	23			—	—				1	158				—	—
Residential mortgage	2	181			—	—				1	100				—	—
Total interest only	6	3,892			3	4,618				8	13,049				2	495
Loan term extension
Construction and land development - commercial	5	2,517			—	—				9	5,449				1	2,634
Commercial mortgage	1	157			—	—				2	1,413				—	—
Commercial and industrial	2	1,042			—	—				2	147				—	—
Residential mortgage	1	198			1	198				4	5,125				1	4,606
Total loan term extension	9	3,914			1	198				17	12,134				2	7,240
Below market interest rate
Construction and land development - commercial	5	3,489			2	1,067				10	1,464				2	929
Commercial mortgage	9	11,428			2	1,290				14	13,493				5	2,747
Other commercial real estate	—	—			—	—				2	1,766				—	—
Commercial and industrial	3	510			—	—				4	1,137				2	—
Residential mortgage	10	2,871			6	1,545				18	1,522				7	72
Construction and land development - noncommercial	—	—			—	—				1	—				1	—
Total below market interest rate	27	18,298			10	3,902				49	19,382				17	3,748
Total acquired restructurings	42	$	26,104		14	$	8,718			74	$	44,565			21	$	11,483

Other_Real_Estate_Owned

Other Real Estate Owned	9 Months Ended
	Sep. 30, 2013
Banking and Thrift [Abstract]	'
Other Real Estate Owned	'
	Other Real Estate Owned
	The following table explains changes in other real estate owned during the nine months ended September 30, 2013, and 2012.
		Covered			Noncovered			Total
		(dollars in thousands)
	Balance at December 31, 2011	$	148,599		$	50,399		$	198,998
	Additions	89,811			27,552			117,363
	Sales	(100,620		)	(24,960		)	(125,580		)
	Writedowns	(21,385		)	(7,928		)	(29,313		)
	Balance at September 30, 2012	$	116,405		$	45,063		$	161,468
	Balance at December 31, 2012	$	102,577		$	43,513		$	146,090
	Additions	50,365			28,756			79,121
	Sales	(78,597		)	(29,266		)	(107,863		)
	Writedowns	(15,576		)	(2,665		)	(18,241		)
	Balance at September 30, 2013	$	58,769		$	40,338		$	99,107

Receivable_from_FDIC_for_Loss_

Receivable from FDIC for Loss Share Agreements	9 Months Ended
	Sep. 30, 2013
Receivable From FDIC For Loss Share Agreements [Abstract]	'
Receivable from FDIC for Loss Share Agreements	'
	Receivable from the FDIC for Loss Share Agreements
	The following table provides changes in the receivable from the FDIC for the three-month and nine-month periods ended September 30, 2013, and 2012.
		Three months ended September 30						Nine months ended September 30
		2013			2012			2013			2012
		(dollars in thousands)
	Balance at beginning of period	$	158,013		$	405,626		$	270,192		$	617,377
	Accretion of discounts and premiums, net	(20,553		)	(32,398		)	(65,734		)	(79,135		)
	Cash payments to/(from) FDIC	1,431			(31,765		)	(45,103		)	(223,863		)
	Post-acquisition and other adjustments, net	(38,338		)	(11,844		)	(58,802		)	15,240
	Balance at end of period	$	100,553		$	329,619		$	100,553		$	329,619
	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 related to the loss share agreements based on the expected reimbursements for losses and the applicable loss share percentages. See Note J for information related to BancShares' recorded payable to the FDIC for loss share agreements.
	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 any previously recorded provision for loan and lease losses and related allowance for loan and lease losses and adjustments 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. Other adjustments include those resulting from unexpected recoveries of amounts previously charged off.

Estimated_Fair_Values

Estimated Fair Values	9 Months Ended
	Sep. 30, 2013
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 of an asset or liability within the fair value hierarchy is based on the lowest 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. U.S.Treasury, government agency, mortgage-backed securities and state, county, and municipal securities are measured at fair value using significant observable inputs such as benchmark yields, reported trades, broker/dealer quotes, issuer spreads, benchmark securities and bids/offers. The inputs used for these securities are considered level 2 inputs. 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, the inputs used for these securities are considered level 2 inputs.
	Loans held for sale. Fair value for loans held for sale is generally based on market prices for loans with similar characteristics or external valuations. The inputs used in the fair value measurements for loans held for sale are considered 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 measurements 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.
	Preferred stock issued under the TARP program. 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.
	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 measurements 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 measurements 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 measurements 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. If the fair value of the swap is a net asset, the risk of default by the counterparty is considered in the determination of fair value and is considered a level 3 input. The inputs used in the fair value measurements 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 September 30, 2013, and December 31, 2012. 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 relating to them that would cause the fair value to differ from the carrying value.
		September 30, 2013				December 31, 2012
		Carrying value		Fair value		Carrying value		Fair value
		(dollars in thousands)
	Cash and due from banks	$	569,118	$	569,118	$	639,730	$	639,730
	Overnight investments	1,354,131		1,354,131		443,180		443,180
	Investment securities available for sale	5,161,585		5,161,585		5,226,228		5,226,228
	Investment securities held to maturity	1,013		1,080		1,342		1,448
	Loans held for sale	43,054		44,819		86,333		87,654
	Acquired loans, net of allowance for loan and lease losses	1,128,764		1,106,189		1,669,263		1,635,878
	Originated loans, net of allowance for loan and lease losses	11,706,303		11,480,252		11,397,069		11,238,597
	Receivable from the FDIC for loss share agreements (1)	100,553		28,450		270,192		100,161
	Income earned not collected	46,110		46,110		47,666		47,666
	Stock issued by:
	Federal Home Loan Bank of Atlanta	31,938		31,938		36,139		36,139
	Federal Home Loan Bank of San Francisco	7,024		7,024		10,107		10,107
	Federal Home Loan Bank of Seattle	4,290		4,290		4,410		4,410
	Preferred stock	31,749		32,996		40,768		40,793
	Deposits	18,063,319		18,089,336		18,086,025		18,126,893
	Short-term borrowings	604,435		604,435		568,505		568,505
	Long-term obligations	510,963		530,080		444,921		472,642
	Payable to the FDIC for loss share agreements	107,419		123,321		101,641		125,065
	Accrued interest payable	6,051		6,051		9,353		9,353
	Interest rate swap	7,909		7,909		10,398		10,398
	(1) The fair value of the FDIC receivable excludes receivable related to accretable yield to be amortized 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. Impaired loans, OREO, goodwill and other intangible assets are periodically tested for impairment. 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 September 30, 2013, and December 31, 2012.
				Fair value measurements using:
	Description	Fair value		Level 1		Level 2		Level 3
		(dollars in thousands)
	September 30, 2013
	Assets measured at fair value
	Investment securities available for sale
	U.S. Treasury	$	448,532	$	—	$	448,532	$	—
	Government agency	2,584,780		—		2,584,780		—
	Mortgage-backed securities	2,106,032		—		2,106,032		—
	Equity securities	21,224		—		21,224		—
	State, county, municipal	187		—		187		—
	Other	830		—		830		—
	Total	$	5,161,585	$	—	$	5,161,585	$	—
	Liabilities measured at fair value
	Interest rate swaps accounted for as cash flow hedges	$	7,909	$	—	$	7,909	$	—
	December 31, 2012
	Assets measured at fair value
	Investment securities available for sale
U.S. Treasury	$	823,632	$	—	$	823,632	$	—
Government agency	3,055,204		—		3,055,204		—
Mortgage-backed securities	1,329,657		—		1,329,657		—
Equity securities	16,365		—		16,365		—
State, county, municipal	550		—		550		—
Other	820		—		820		—
Total	$	5,226,228	$	—	$	5,226,228	$	—
Liabilities measured at fair value
Interest rate swaps accounted for as cash flow hedges	$	10,398	$	—	$	10,398	$	—
During the third quarter, management reevaluated its fair value leveling methodology and the inputs utilized by the 3rd party pricing services for the current and prior periods. Management concluded that due to the reliance on significant observable inputs, the fair values of its US Treasury, Government agency and other securities should be classified as level 2 rather than the level 1 previously disclosed. Management also concluded that its equity securities should be classified as level 2 rather than the level 1 previously disclosed due to the inactive nature of the markets in which these securities trade.
There were no transfers between levels during the nine months ended September 30, 2013, and 2012 other than the reclassification referenced above, which was made for all periods presented.
Certain financial assets and liabilities are carried at fair value on a nonrecurring basis. 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. Certain impaired loans are also carried at fair value. Noncovered OREO that has been recently remeasured is deemed to be at fair value. For financial assets and liabilities carried at fair value on a nonrecurring basis, the following table provides fair value information as of September 30, 2013, and December 31, 2012.
			Fair value measurements using:
Description	Fair value		Level 1		Level 2		Level 3
	(dollars in thousands)
September 30, 2013
Loans held for sale	$	23,728	$	—	$	23,728	$	—
Originated impaired loans	90,211		—		—		90,211
Other real estate not covered under loss share agreements remeasured during current year	4,596		—		—		4,596
December 31, 2012
Loans held for sale	65,244		—		65,244		—
Originated impaired loans	51,644		—		—		51,644
Other real estate not covered under loss share agreements remeasured during current year	21,113		—		—		21,113
The value of loans held for sale are generally based on market prices for loans with similar characteristics or external valuations.
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.
OREO is measured and reported at fair value using level 3 inputs for valuations based on unobservable criteria. The values of OREO are determined by 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.
No financial liabilities were carried at fair value on a nonrecurring basis as of September 30, 2013, and December 31, 2012.

Employee_Benefit_Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2013
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 and nine-month periods ended September 30, 2013, and 2012 the components of pension expense are as follows:
		Three months ended September 30						Nine months ended September 30
		2013			2012			2013			2012
		(dollars in thousands)
	Service cost	$	3,765		$	4,012		$	12,248		$	10,387
	Interest cost	5,460			7,151			17,764			17,293
	Expected return on assets	(6,393		)	(8,576		)	(20,798		)	(20,710		)
	Amortization of prior service cost	53			53			158			158
	Amortization of net actuarial loss	4,245			2,735			12,738			8,210
	Total pension expense	$	7,130		$	5,375		$	22,110		$	15,338
	The assumed discount rate for 2013 is 4.00 percent, the expected long-term rate of return on plan assets is 7.25 percent and the assumed rate of salary increases is 4.00 percent. For 2012 the assumed discount rate was 4.75 percent, expected long-term rate of return was 7.50 percent and the assumed rate of salary increases was 4.00 percent.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	Income tax expense totaled $25,659 and $19,974 for the third quarters of 2013 and 2012, representing effective tax rates of 38.5 percent and 33.6 percent during the respective periods. For the first nine months of 2013, income tax expense totaled $82,012 compared to $49,009 during 2012. The effective tax rates for the nine-month periods equals 36.9 percent and 30.3 percent, respectively.
	During the third quarter of 2013, BancShares adjusted its net deferred tax asset as a result of reductions in the North Carolina corporate income tax rate that were enacted July 23, 2013, and will become effective January 1, 2014, and January 1, 2015. The lower corporate income tax rate resulted in a reduction in the deferred tax asset and an increase in current period income tax expense. The lower effective tax rate for the first nine months of 2012 also reflects the impact of a $6,449 credit to income tax expense resulting from the favorable outcome of state tax audits for the period 2008-2010, net of additional federal taxes.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2013
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 September 30, 2013, BancShares had unused commitments totaling $5,788,492, compared to $5,467,998 at December 31, 2012.
	Standby letters of credit are commitments guaranteeing performance of a customer to a third party. Those guarantees are issued primarily to support public and private borrowing arrangements. To minimize its exposure, BancShares’ credit policies govern the issuance of standby letters of credit. At September 30, 2013, and December 31, 2012, BancShares had standby letters of credit amounting to $56,941 and $63,085, 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.
	Residential mortgage loans are sold with standard representations and warranties relating to documentation and underwriting requirements for the loans. If deficiencies are discovered at any point in the life of the loan, the investor may require BancShares to repurchase the loan. As of September 30, 2013, and December 31, 2012, other liabilities included a reserve of $3,641 and $4,065, respectively, for estimated losses arising from the repurchase of loans under these provisions.
	In addition to standard representations and warranties, residential mortgage loans sold with limited recourse liability represent guarantees to repurchase the loans or repay a portion of the sale proceeds in the event of nonperformance by the borrower. The recourse period is generally 120 days or fewer after sale. At September 30, 2013, and December 31, 2012, BancShares has sold loans of approximately $200,379 and $205,888, respectively, for which the recourse period had not yet elapsed.
	BancShares has recorded a receivable from the FDIC 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 an estimated 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 for loss share agreements. As of September 30, 2013, and December 31, 2012, the clawback liability was $107,419 and $101,641, 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.
	On February 18, 2011, United Western Bank, United Western Bank's parent company, United Western Bancorp, and five of their directors filed a complaint in the United States District Court for the District of Columbia against the Office of Thrift Supervision (OTS), its Acting Director and the FDIC in its corporate and receivership capacities, alleging that the seizure of United Western Bank by the OTS and the subsequent appointment of the FDIC as receiver were illegal. The complaint requested the court to direct the OTS to remove the FDIC as receiver and return control of United Western Bank to the plaintiffs. Neither BancShares nor FCB was named as a party. In June 2011, the Court dismissed all plaintiffs other than United Western Bank and dismissed the FDIC in both capacities, leaving United Western Bank and the OTS and its Acting Director as the only parties. In July 2011, following passage of the Dodd-Frank Act, the Office of the Comptroller of the Currency (OCC) and the Acting Comptroller were substituted for the OTS and its Acting Director as the only defendants. On March 5, 2013, the court entered a final, appealable order denying United Western Bank's Motion for Summary Judgment and granting OCC's and the Comptroller's Motion for Summary Judgment. On April 26, 2013, United Western Bank filed its Notice of Appeal to the U.S. Court of Appeals for the District of Columbia. On June 20, 2013, United Western Bank filed a Motion for the Voluntary Dismissal of its appeal. The Motion was granted and the appeal was dismissed on July 3, 2013.
	During March 2012, FCB received communications from the US Small Business Administration (SBA) asserting that the SBA is entitled to receive a share of amounts paid or to be paid by the FDIC to FCB relating to certain specific SBA-guaranteed loans pursuant to the loss share agreement between FCB and the FDIC applicable to Temecula Valley Bank. FCB disputes the validity of the SBA claims and is pursuing administrative relief through the SBA. During the second quarter of 2013, SBA advised that it will no longer pursue this claim.

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2013
Summary of Derivative Instruments [Abstract]	'
Derivatives	'
	Derivatives
	At September 30, 2013, 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 $93,500, 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 September 30, 2013, collateral with a fair value of $9,651 was pledged to secure the existing obligation under the interest rate swap.
		September 30, 2013						December 31, 2012
		Notional  amount			Estimated fair value of liability			Notional  amount		Estimated fair value of liability
		(dollars in thousands)
	2011 interest rate swap hedging variable rate exposure on trust preferred securities 2011-2016	$	93,500		$	7,909		$	93,500	$	10,398
	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 (loss), 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-month periods ended September 30, 2013, and 2012, BancShares recognized interest expense of $831 and $769, respectively, resulting from incremental interest paid to the interest rate swap counterparty, none of which related to ineffectiveness. For the nine-month periods ended September 30, 2013, and 2012, BancShares recognized interest expense of $2,463 and $2,294, respectively, resulting from incremental interest paid to the interest rate swap counterparty, none of which related to ineffectiveness.
	The estimated net amount in accumulated other comprehensive loss at September 30, 2013, that is expected to be reclassified into earnings within the next 12 months is a net after-tax loss of $1,927.
	The following table discloses activity in accumulated other comprehensive income (loss) related to the interest rate swap during the nine-month periods ended September 30, 2013, and 2012.
		2013			2012
		(dollars in thousands)
	Accumulated other comprehensive loss resulting from interest rate swaps as of January 1	$	(10,398	)	$	(10,714	)
	Other comprehensive income (loss) recognized during the nine-month period ended September 30	2,489			(456		)
	Accumulated other comprehensive loss resulting from interest rate swaps as of September 30	$	(7,909	)	$	(11,170	)
	BancShares monitors the credit risk of the interest rate swap counterparty.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2013
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 September 30, 2013, and December 31, 2012:
		September 30, 2013												December 31, 2012
		Accumulated				Deferred				Accumulated				Accumulated				Deferred			Accumulated
		other				tax				other				other				tax			other
		comprehensive				benefit				comprehensive				comprehensive				expense			comprehensive
		loss								loss,				income (loss)				(benefit)			income (loss),
										net of tax											net of tax
		(dollars in thousands)
	Unrealized (losses) gains on investment securities available for sale	$	(3,189	)		$	(1,365	)		$	(1,824	)		$	33,809			$	13,292		$	20,517
	Funded status of defined benefit plan	(145,438		)		(56,575		)		(88,863		)		(158,334		)		(62,003		)	(96,331		)
	Unrealized loss on cash flow hedge	(7,909		)		(3,051		)		(4,858		)		(10,398		)		(4,106		)	(6,292		)
	Total	$	(156,536	)		$	(60,991	)		$	(95,545	)		$	(134,923	)		$	(52,817	)	$	(82,106	)
	The following table highlights changes in accumulated other comprehensive income by component for three and nine months ended September 30, 2013, and 2012:
			Gains and losses on cash flow hedges1				Unrealized gains and losses on available-for-sale securities1				Defined benefit pension items1				Total
			(dollars in thousands)
	Three months ended September 30, 2013
	Beginning balance		$	(4,959	)		$	(4,117	)		$	(91,100	)		$	(100,176	)
	Other comprehensive income (loss) before reclassifications		(330		)		2,293				—				1,963
	Amounts reclassified from accumulated other comprehensive income		431				—				2,237				2,668
	Net current period other comprehensive income (loss)		101				2,293				2,237				4,631
	Ending balance		$	(4,858	)		$	(1,824	)		$	(88,863	)		$	(95,545	)
	Three months ended September 30, 2012
	Beginning balance		$	(6,670	)		$	17,073			$	(72,810	)		$	(62,407	)
	Other comprehensive income before reclassifications		(555		)		8,834				—				8,279
	Amounts reclassified from accumulated other comprehensive (loss) income		465				(19		)		1,696				2,142
	Net current period other comprehensive (loss) income		(90		)		8,815				1,696				10,421
	Ending balance		$	(6,760	)		$	25,888			$	(71,114	)		$	(51,986	)
	Nine months ended September 30, 2013
	Beginning balance		$	(6,292	)		$	20,517			$	(96,331	)		$	(82,106	)
	Other comprehensive income (loss)before reclassifications		15				(22,341		)		—				(22,326		)
	Amounts reclassified from accumulated other comprehensive income		1,419				—				7,468				8,887
	Net current period other comprehensive income (loss)		1,434				(22,341		)		7,468				(13,439		)
	Ending balance		$	(4,858	)		$	(1,824	)		$	(88,863	)		$	(95,545	)
	Nine months ended September 30, 2012
	Beginning balance		$	(6,484	)		$	16,115			$	(76,205	)		$	(66,574	)
	Other comprehensive (loss) income before reclassifications		(1,664		)		9,794				—				8,130
	Amounts reclassified from accumulated other comprehensive income (loss)		1,388				(21		)		5,091				6,458
	Net current period other comprehensive (loss) income		(276		)		9,773				5,091				14,588
	Ending balance		$	(6,760	)		$	25,888			$	(71,114	)		$	(51,986	)
	1 All amounts are net of tax. Amounts in parentheses indicate debits.
	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)
	Three months ended September 30, 2013
	Gains and losses on cash flow hedges
	Interest rate swap contracts		$	(831	)		Long-term obligations
			400				Income taxes
			$	(431	)		Net income
	Unrealized gains and losses on available for sale securities
			$	—			Securities gains (losses)
			—				Income taxes
			$	—			Net income
	Amortization of defined benefit pension items
	Prior service costs		$	(53	)		Employee benefits
	Actuarial gains		(4,245		)		Employee benefits
			(4,298		)		Income before income taxes
			2,061				Income taxes
			$	(2,237	)		Net income
	Total reclassifications for the period		$	(2,668	)
	Three months ended September 30, 2012
	Gains and losses on cash flow hedges
	Interest rate swap contracts		$	(769	)		Long-term obligations
			304				Income taxes
		$	(465	)		Net income
Unrealized gains and losses on available for sale securities
		$	31			Securities gains (losses)
		(12		)		Income taxes
		$	19			Net income
Amortization of defined benefit pension items
Prior service costs		$	(53	)		Employee benefits
Actuarial gains		(2,735		)		Employee benefits
		(2,788		)		Income before income taxes
		1,092				Income taxes
		$	(1,696	)		Net income
Total reclassifications for the period		$	(2,142	)
1 Amounts in parentheses indicate debits to profit/loss.
Details about accumulated other comprehensive loss		Amount reclassified from accumulated other comprehensive loss1				Affected line item in the statement where net income is presented
		(dollars in thousands)
Nine months ended September 30, 2013
Gains and losses on cash flow hedges
Interest rate swap contracts		$	(2,463	)		Long-term obligations
		1,044				Income taxes
		$	(1,419	)		Net income
Unrealized gains and losses on available for sale securities
		$	—			Securities gains (losses)
		—				Income taxes
		$	—			Net income
Amortization of defined benefit pension items
Prior service costs		$	(158	)		Employee benefits
Actuarial gains		(12,738		)		Employee benefits
		(12,896		)		Income before income taxes
		5,428				Income taxes
		$	(7,468	)		Net income
Total reclassifications for the period		$	(8,887	)
Nine months ended September 30, 2012
Gains and losses on cash flow hedges
Interest rate swap contracts		$	(2,294	)		Long-term obligations
		906				Income taxes
		$	(1,388	)		Net income
Unrealized gains and losses on available for sale securities
		$	34			Securities gains (losses)
		(13		)		Income taxes
		$	21			Net income
Amortization of defined benefit pension items
Prior service costs		$	(158	)		Employee benefits
Actuarial gains		(8,210		)		Employee benefits
		(8,368		)		Income before income taxes
		3,277				Income taxes
		$	(5,091	)		Net income
Total reclassifications for the period		$	(6,458	)
1 Amounts in parentheses indicate debits to profit/loss.

Investments_Tables

Investments (Tables)	9 Months Ended
	Sep. 30, 2013
Investments [Abstract]	'
Aggregate Values And Unrealized Gains And Losses Of Investment Securities	'
	The aggregate values of investment securities at September 30, 2013, and December 31, 2012, along with unrealized gains and losses determined on an individual security basis are as follows:
		Cost		Gross		Gross unrealized		Fair
				unrealized		losses		value
				gains
		(dollars in thousands)
	Investment securities available for sale
	September 30, 2013
	U.S. Treasury	$	448,201	$	372	$	41	$	448,532
	Government agency	2,583,888		2,320		1,428		2,584,780
	Mortgage-backed securities	2,131,099		5,452		30,519		2,106,032
	Equity securities	543		20,681		—		21,224
	State, county and municipal	186		1		—		187
	Other	857		—		27		830
	Total investment securities available for sale	$	5,164,774	$	28,826	$	32,015	$	5,161,585
	December 31, 2012
	U.S. Treasury	$	823,241	$	403	$	12	$	823,632
	Government agency	3,052,040		3,501		337		3,055,204
	Mortgage-backed securities	1,315,211		14,787		341		1,329,657
	Equity securities	543		15,822		—		16,365
	State, county and municipal	546		4		—		550
	Other	838		—		18		820
	Total investment securities available for sale	$	5,192,419	$	34,517	$	708	$	5,226,228
	Investment securities held to maturity
	September 30, 2013
	Mortgage-backed securities	$	1,013	$	67	$	—	$	1,080
	December 31, 2012
	Mortgage-backed securities	$	1,342	$	133	$	27	$	1,448
Investment Securities Maturity Information	'
	The following table provides the maturity distribution for non-amortizing securities. Repayments of mortgage-backed securities are dependent on the repayments of the underlying loan balances. Equity securities do not have a stated maturity date.
		September 30, 2013				December 31, 2012
		Cost		Fair		Cost		Fair
				value				value
		(dollars in thousands)
	Investment securities available for sale
	Amortizing securities maturing in:
	One year or less	$	864,992	$	865,925	$	2,285,159	$	2,286,403
	One through five years	2,168,080		2,168,344		1,590,608		1,592,923
	Five through 10 years	60		60		898		880
	Over 10 years	—		—		—		—
	Mortgage-backed securities	2,131,099		2,106,032		1,315,211		1,329,657
	Equity securities	543		21,224		543		16,365
	Total investment securities available for sale	$	5,164,774	$	5,161,585	$	5,192,419	$	5,226,228
	Investment securities held to maturity
	Mortgage-backed securities held to maturity	$	1,013	$	1,080	$	1,342	$	1,448
Securities Gains (Losses)	'
	For each period presented, securities gains (losses) include the following:
		Three months ended September 30				Nine months ended September 30
		2013		2012		2013		2012
		(dollars in thousands)
	Gross gains on sales of investment securities available for sale	$	—	$	31	$	—	$	36
	Gross losses on sales of investment securities available for sale	—		—		—		(2		)
	Other than temporary impairment loss on equity securities	—		—		—		(45		)
	Total securities gains (losses)	$	—	$	31	$	—	$	(11	)
Investment Securities With Unrealized Losses	'
	The following table provides information regarding securities with unrealized losses as of September 30, 2013, and December 31, 2012.
		Less than 12 months				12 months or more					Total
		Fair		Unrealized		Fair		Unrealized			Fair		Unrealized
		Value		Losses		Value		Losses			Value		Losses
		(dollars in thousands)
	September 30, 2013
	Investment securities available for sale:
	U.S. Treasury	$	51,836	$	41	$	—	$	—		$	51,836	$	41
	Government agency	953,103		1,428		—		—			953,103		1,428
	Mortgage-backed securities	1,820,909		29,712		27,949		807			1,848,858		30,519
	Other	830		27		—		—			830		27
	Total	$	2,826,678	$	31,208	$	27,949	$	807		$	2,854,627	$	32,015
	Investment securities held to maturity:
	Mortgage-backed securities	$	—	$	—	$	—	$	—		$	—	$	—
	December 31, 2012
	Investment securities available for sale:
	U.S. Treasury	$	120,045	$	12	$	—	$	—		$	120,045	$	12
	Government agency	407,498		337		—		—			407,498		337
	Mortgage-backed securities	135,880		214		9,433		127			145,313		341
	Other	820		18		—		—			820		18
	Total	$	664,243	$	581	$	9,433	$	127		$	673,676	$	708
	Investment securities held to maturity:
	Mortgage-backed securities	$	—	$	—	$	17	$	27		$	17	$	27

Loans_and_Leases_Tables

Loans and Leases (Tables)	9 Months Ended
	Sep. 30, 2013
Loans and Leases Receivable Disclosure [Abstract]	'
Loans And Leases Outstanding	'
	Loans and leases outstanding include the following as of the dates indicated:
		September 30, 2013			December 31, 2012
		(dollars in thousands)
	Acquired loans	$	1,188,281		$	1,809,235
	Originated loans and leases:
	Commercial:
	Construction and land development	300,266			309,190
	Commercial mortgage	6,308,192			6,029,435
	Other commercial real estate	177,599			160,980
	Commercial and industrial	1,009,641			1,038,530
	Lease financing	365,967			330,679
	Other	180,435			125,681
	Total commercial loans	8,342,100			7,994,495
	Noncommercial:
	Residential mortgage	927,426			822,889
	Revolving mortgage	2,113,240			2,210,133
	Construction and land development	121,553			131,992
	Consumer	380,266			416,606
	Total noncommercial loans	3,542,485			3,581,620
	Total originated loans and leases	11,884,585			11,576,115
	Total loans and leases	$	13,072,866		$	13,385,350
		September 30, 2013									December 31, 2012
		Impaired at			All other			Total			Impaired at			All other		Total
		acquisition			acquired loans						acquisition			acquired loans
		date									date
		(dollars in thousands)
	Acquired loans:
	Commercial:
	Construction and land development	$	23,136		$	70,827		$	93,963		$	71,225		$	166,681	$	237,906
	Commercial mortgage	81,389			662,960			744,349			107,281			947,192		1,054,473
	Other commercial real estate	8,713			42,395			51,108			35,369			71,750		107,119
	Commercial and industrial	144			24,304			24,448			3,932			45,531		49,463
	Other	—			1,003			1,003			—			1,074		1,074
	Total commercial loans	113,382			801,489			914,871			217,807			1,232,228		1,450,035
	Noncommercial:
	Residential mortgage	32,389			199,921			232,310			48,077			249,849		297,926
	Revolving mortgage	8,416			26,418			34,834			9,606			29,104		38,710
	Construction and land development	5,145			192			5,337			15,136			5,657		20,793
	Consumer	—			929			929			—			1,771		1,771
	Total noncommercial loans	45,950			227,460			273,410			72,819			286,381		359,200
	Total acquired loans	$	159,332		$	1,028,949		$	1,188,281		$	290,626		$	1,518,609	$	1,809,235
Composition Of The Loans And Leases Outstanding By Credit Quality Indicator	'
	The composition of the loans and leases outstanding at September 30, 2013, and December 31, 2012, by credit quality indicator is provided below:
		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
		(dollars in thousands)
	September 30, 2013
	Pass	$	285,044		$	6,019,286		$	172,341		$	885,691		$	359,195	$	179,085	$	7,900,642
	Special mention	12,060			125,280			1,241			17,260			2,664		1,350		159,855
	Substandard	3,109			155,593			3,709			6,606			3,335		—		172,352
	Doubtful	53			6,703			75			1,428			773		—		9,032
	Ungraded	—			1,330			233			98,656			—		—		100,219
	Total	$	300,266		$	6,308,192		$	177,599		$	1,009,641		$	365,967	$	180,435	$	8,342,100
	December 31, 2012
	Pass	$	274,480		$	5,688,541		$	151,549		$	894,998		$	325,626	$	124,083	$	7,459,277
	Special mention	14,666			166,882			2,812			13,275			1,601		837		200,073
	Substandard	18,761			157,966			5,038			12,073			1,663		756		196,257
	Doubtful	952			13,475			98			1,040			771		—		16,336
	Ungraded	331			2,571			1,483			117,144			1,018		5		122,552
	Total	$	309,190		$	6,029,435		$	160,980		$	1,038,530		$	330,679	$	125,681	$	7,994,495
		Originated noncommercial loans and leases
		Residential			Revolving			Construction			Consumer			Total originated noncommercial
		mortgage			mortgage			and land						loans
								development
		(dollars in thousands)
	September 30, 2013
	Current	$	900,625		$	2,097,658		$	119,395		$	376,237		$	3,493,915
	30-59 days past due	11,840			9,921			1,907			2,502			26,170
	60-89 days past due	3,312			1,556			85			1,015			5,968
	90 days or greater past due	11,649			4,105			166			512			16,432
	Total	$	927,426		$	2,113,240		$	121,553		$	380,266		$	3,542,485
	December 31, 2012
	Current	$	786,626		$	2,190,186		$	128,764		409,218			$	3,514,794
	30-59 days past due	15,711			12,868			1,941			4,405			34,925
	60-89 days past due	7,559			3,200			490			1,705			12,954
	90 days or greater past due	12,993			3,879			797			1,278			18,947
	Total	$	822,889		$	2,210,133		$	131,992		$	416,606		$	3,581,620
		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
		(dollars in thousands)
	September 30, 2013
	Pass	$	3,373		$	308,809		$	22,007		$	7,553		$	145,735	$	26,291	$	139	$	1,468	$	515,375
	Special mention	18,395			176,338			6,602			9,268			8,676		2,865		—		26		222,170
	Substandard	62,472			209,383			13,786			5,908			57,156		3,329		4,903		—		356,937
	Doubtful	8,013			49,165			8,713			1,502			2,660		2,349		295		—		72,697
	Ungraded	1,710			654			—			217			18,083		—		—		438		21,102
	Total	$	93,963		$	744,349		$	51,108		$	24,448		$	232,310	$	34,834	$	5,337	$	1,932	$	1,188,281
	December 31, 2012
	Pass	$	17,010		$	376,974		$	33,570		$	19,451		$	172,165	$	29,540	$	334	$	1,617	$	650,661
	Special mention	25,734			259,264			17,518			12,465			14,863		1,736		—		34		331,614
	Substandard	105,061			344,542			44,335			14,698			83,193		7,434		17,190		239		616,692
	Doubtful	87,445			73,016			11,696			2,757			4,268		—		3,269		117		182,568
	Ungraded	2,656			677			—			92			23,437		—		—		838		27,700
	Total	$	237,906		$	1,054,473		$	107,119		$	49,463		$	297,926	$	38,710	$	20,793	$	2,845	$	1,809,235
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 September 30, 2013, and December 31, 2012, (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 due to various grace periods that allow borrowers to make payments within a stated period after the due date and still remain in compliance with the loan agreement.
		30-59 days			60-89 days			90 days or greater			Total past			Current		Total loans
		past due			past due						due					and leases
		(dollars in thousands)
	September 30, 2013
	Originated loans and leases:
	Construction and land development - commercial	$	1,755		$	49		$	562		$	2,366		$	297,900	$	300,266
	Commercial mortgage	15,917			10,522			18,449			44,888			6,263,304		6,308,192
	Other commercial real estate	103			400			1,169			1,672			175,927		177,599
	Commercial and industrial	2,633			796			1,675			5,104			1,004,537		1,009,641
	Lease financing	2,317			—			178			2,495			363,472		365,967
	Other	—			—			—			—			180,435		180,435
	Residential mortgage	11,840			3,312			11,649			26,801			900,625		927,426
	Revolving mortgage	9,921			1,556			4,105			15,582			2,097,658		2,113,240
	Construction and land development - noncommercial	1,907			85			166			2,158			119,395		121,553
	Consumer	2,502			1,015			512			4,029			376,237		380,266
	Total originated loans and leases	$	48,895		$	17,735		$	38,465		$	105,095		$	11,779,490	$	11,884,585
	December 31, 2012
	Originated loans and leases:
	Construction and land development - commercial	$	927		$	—		$	7,878		$	8,805		$	300,385	$	309,190
	Commercial mortgage	24,447			4,179			21,327			49,953			5,979,482		6,029,435
	Other commercial real estate	387			1,240			1,034			2,661			158,319		160,980
	Commercial and industrial	2,833			1,096			605			4,534			1,033,996		1,038,530
	Lease financing	991			138			621			1,750			328,929		330,679
	Other	18			13			—			31			125,650		125,681
	Residential mortgage	15,711			7,559			12,993			36,263			786,626		822,889
	Revolving mortgage	12,868			3,200			3,879			19,947			2,190,186		2,210,133
	Construction and land development - noncommercial	1,941			490			797			3,228			128,764		131,992
	Consumer	4,405			1,705			1,278			7,388			409,218		416,606
	Total originated loans and leases	$	64,528		$	19,620		$	50,412		$	134,560		$	11,441,555	$	11,576,115
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 September 30, 2013, and December 31, 2012, (excluding loans and leases acquired with deteriorated credit quality) are as follows:
		September 30, 2013						December 31, 2012
		Nonaccrual			Loans and			Nonaccrual			Loans and
		loans and			leases > 90			loans and			leases > 90
		leases			days and			leases			days and
					accruing						accruing
		(dollars in thousands)
	Originated loans and leases:
	Construction and land development - commercial	$	493		$	164		$	14,930		$	541
	Commercial mortgage	44,818			601			50,532			1,671
	Commercial and industrial	2,978			238			6,972			466
	Lease financing	1,000			69			1,075			—
	Other commercial real estate	1,937			800			2,319			—
	Construction and land development - noncommercial	463			166			668			111
	Residential mortgage	15,119			2,708			12,603			3,337
	Revolving mortgage	—			4,105			—			3,877
	Consumer	32			512			746			1,269
	Total originated loans and leases	$	66,840		$	9,363		$	89,845		$	11,272
Changes In Carrying Value Of Acquired Impaired Loans	'
	The following table provides changes in the carrying value of acquired loans impaired at acquisition date and all other acquired loans during the nine months ended September 30, 2013, and 2012:
		2013						2012
		Impaired at			All other			Impaired at			All other
		acquisition			acquired loans			acquisition			acquired loans
		date						date
		(dollars in thousands)
	Balance, January 1	$	290,626		$	1,518,609		$	458,305		$	1,903,847
	Reductions for repayments, foreclosures and changes in carrying value, net of accretion	(131,294		)	(489,660		)	(167,581		)	(297,474		)
	Balance, September 30	$	159,332		$	1,028,949		$	290,724		$	1,606,373
	Outstanding principal balance at September 30	$	670,256		$	1,412,617		$	1,077,975		$	2,253,660
Changes In The Amount Of Accretable Yield	'
	The following table documents changes to the amount of accretable yield for the first nine months of 2013 and 2012. Other, net includes reclassifications from nonaccretable difference to accretable yield and changes to accretable yield attributable to revised cash flow estimates.
		2013			2012
		(dollars in thousands)
	Balance, January 1	$	539,564		$	276,690
	Accretion	(179,792		)	(193,438		)
	Other, net	107,300			498,874
	Balance, September 30	$	467,072		$	582,126

Allowance_for_Loan_and_Lease_L1

Allowance for Loan and Lease Losses (Tables)	9 Months Ended
	Sep. 30, 2013
Allowance for Loan and Lease Losses, Adjustments, Net [Abstract]	'
Allocation of Allowance for Loan and Lease Losses [Table Text Block]	'
	Activity in the allowance for loan and lease losses, ending balances of loans and leases and related allowance by class of loans is summarized as follows:
		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
		(dollars in thousands)
	Originated Loans
	Allowance for loan and lease losses:
	Nine months ended September 30, 2013
	Balance at January 1	$	6,031		$	80,229			$	2,059			$	14,050			$	3,521		$	1,175		$	3,836		$	25,185		$	1,721		$	25,389		$	15,850		$	179,046
	Reclassification (1)	5,141			27,421				(815		)		7,551				(253		)	(1,288		)	5,717			(9,838		)	(478		)	(10,018		)	(15,772		)	7,368
	Charge-offs	(4,570		)	(1,662		)		(77		)		(3,917		)		(123		)	(6		)	(1,987		)	(4,540		)	(304		)	(7,601		)	—			(24,787		)
	Recoveries	722			740				75				1,003				90			1			353			462			180			1,850			—			5,476
	Provision	3,259			(7,695		)		(207		)		3,951				1,358			307			2,126			4,546			(571		)	4,183			(78		)	11,179
	Balance at September 30	$	10,583		$	99,033			$	1,035			$	22,638			$	4,593		$	189		$	10,045		$	15,815		$	548		$	13,803		$	—		$	178,282
	Nine months ended September 30, 2012
	Balance at January 1	$	5,467		$	67,486			$	2,169			$	23,723			$	3,288		$	1,315		$	8,879		$	27,045		$	1,427		$	25,962		$	14,122		$	180,883
	Charge-offs	(9,504		)	(5,448		)		(254		)		(3,766		)		(335		)	(28		)	(3,381		)	(7,885		)	(914		)	(7,590		)	—			(39,105		)
	Recoveries	370			1,230				6				616				75			4			433			501			168			1,366			—			4,769
	Provision	10,134			18,168				318				(6,937		)		419			(115		)	1,255			6,726			1,441			6,944			1,147			39,500
	Balance at September 30	$	6,467		$	81,436			$	2,239			$	13,636			$	3,447		$	1,176		$	7,186		$	26,387		$	2,122		$	26,682		$	15,269		$	186,047
	Three months ended September 30, 2013
	Balance at July 1	$	11,732		$	104,842			$	1,057			$	19,309			$	4,992		$	360		$	9,996		$	14,997		$	720		$	13,777		$	—		$	181,782
	Reclassification (1)	—			—				—				—				—			—			—			—			—			—			—			—
	Charge-offs	(3,030		)	(794		)		(5		)		(1,671		)		(31		)	—			(719		)	(1,472		)	(59		)	(2,445		)	—			(10,226		)
	Recoveries	84			241				39				344				71			—			253			84			101			577			—			1,794
	Provision	1,797			(5,256		)		(56		)		4,656				(439		)	(171		)	515			2,206			(214		)	1,894			—			4,932
	Balance at September 30	$	10,583		$	99,033			$	1,035			$	22,638			$	4,593		$	189		$	10,045		$	15,815		$	548		$	13,803		$	—		$	178,282
	Three months ended September 30, 2012
	Balance at July 1	$	5,056		$	81,573			$	2,413			$	14,308			$	3,515		$	1,183		$	7,639		$	26,700		$	1,815		$	24,988		$	15,942		$	185,132
	Charge-offs	(283		)	(1,428		)		—				(720		)		—			—			(1,090		)	(1,613		)	(239		)	(2,307		)	—			(7,680		)
	Recoveries	101			222				6				179				27			—			121			87			16			439			—			1,198
	Provision	1,593			1,069				(180		)		(131		)		(95		)	(7		)	516			1,213			530			3,562			(673		)	7,397
	Balance at September 30	$	6,467		$	81,436			$	2,239			$	13,636			$	3,447		$	1,176		$	7,186		$	26,387		$	2,122		$	26,682		$	15,269		$	186,047
	(1) Reclassification results from enhancements to the ALLL calculation during the second quarter of 2013 that resulted in the allocation of $15,772 previously designated as 'non-specific' to other loan classes and the absorption of $7,368 of the reserve for unfunded commitments related to unfunded, revocable loan commitments into the ALLL. Further discussion is contained in Note A.
		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
		(dollars in thousands)
	Allowance for loan and lease losses:
	September 30, 2013
	ALLL for loans and leases individually evaluated for impairment	$	435		$	8,506			$	133			$	2,500			$	177		$	—		$	1,113		$	1,167		$	52		$	133		$	—		$	14,216
	ALLL for loans and leases collectively evaluated for impairment	10,148			90,527				902				20,138				4,416			189			8,932			14,648			496			13,670			—			164,066
	Total allowance for loan and lease losses	$	10,583		$	99,033			$	1,035			$	22,638			$	4,593		$	189		$	10,045		$	15,815		$	548		$	13,803		$	—		$	178,282
	December 31, 2012
	ALLL for loans and leases individually evaluated for impairment	$	2,469		$	11,697			$	298			$	2,133			$	202		$	53		$	959		$	1		$	287		$	256		$	—		$	18,355
	ALLL for loans and leases collectively evaluated for impairment	3,562			68,532				1,761				11,917				3,319			1,122			2,877			25,184			1,434			25,133			—			144,841
	Nonspecific ALLL	—			—				—				—				—			—			—			—			—			—			15,850			15,850
	Total allowance for loan and lease losses	$	6,031		$	80,229			$	2,059			$	14,050			$	3,521		$	1,175		$	3,836		$	25,185		$	1,721		$	25,389		$	15,850		$	179,046
	Loans and leases:
	September 30, 2013
	Loans and leases individually evaluated for impairment	$	2,290		$	116,222			$	2,835			$	11,282			$	309		$	—		$	14,333		$	6,495		$	938		$	1,212		$	—		$	155,916
	Loans and leases collectively evaluated for impairment	297,976			6,191,970				174,764				998,359				365,658			180,435			913,093			2,106,745			120,615			379,054			—			11,728,669
	Total loan and leases	$	300,266		$	6,308,192			$	177,599			$	1,009,641			$	365,967		$	180,435		$	927,426		$	2,113,240		$	121,553		$	380,266		$	—		$	11,884,585
	December 31, 2012
	Loans and leases individually evaluated for impairment	$	17,075		$	133,804			$	3,375			$	22,619			$	804		$	707		$	15,836		$	4,203		$	1,321		$	2,509		$	—		$	202,253
	Loans and leases collectively evaluated for impairment	292,115			5,895,631				157,605				1,015,911				329,875			124,974			807,053			2,205,930			130,671			414,097			—			11,373,862
	Total loan and leases	$	309,190		$	6,029,435			$	160,980			$	1,038,530			$	330,679		$	125,681		$	822,889		$	2,210,133		$	131,992		$	416,606		$	—		$	11,576,115
		Construction			Commercial				Other				Commercial				Lease			Residential			Revolving			Construction			Consumer			Total
		and land			mortgage				commercial				and				financing			mortgage			mortgage			and land			and other
		development -							real estate				industrial													development -
commercial																							noncommercial
	(dollars in thousands)
Acquired Loans
Allowance for loan and lease losses:
Nine months ended September 30, 2013
Balance at January 1	$	31,186		$	50,275			$	11,234			$	8,897			$	—		$	19,837		$	9,754		$	8,287		$	502		$	139,972
Charge-offs	(3,435		)	(10,146		)		(6,622		)		(5,190		)		—			(1,973		)	—			—			(2,379		)	(29,745		)
Recoveries	—			—				—				—				—			—			—			—			—			—
Provision	(25,132		)	(10,809		)		(2,689		)		2,067				—			(3,546		)	(4,918		)	(7,739		)	2,056			(50,710		)
Balance at September 30	$	2,619		$	29,320			$	1,923			$	5,774			$	—		$	14,318		$	4,836		$	548		$	179		$	59,517
Nine months ended September 30, 2012
Balance at January 1	$	16,693		$	39,557			$	16,862			$	5,500			$	13		$	5,433		$	77		$	4,652		$	474		$	89,261
Charge-offs	(6,460		)	(18,396		)		(831		)		(7,916		)		—			(3,431		)	—			(301		)	(66		)	(37,401		)
Recoveries	—			—				—				—				—			142			—			—			—			142
Provision	7,502			19,983				(11,477		)		6,125				(13		)	7,366			5,417			2,577			1,025			38,505
Balance at September 30	$	17,735		$	41,144			$	4,554			$	3,709			$	—		$	9,510		$	5,494		$	6,928		$	1,433		$	90,507
Three months ended September 30, 2013
Balance at July 1	$	7,589		$	33,588			$	4,596			$	5,936			$	—		$	17,272		$	6,031		$	1,232		$	290		$	76,534
Charge-offs	(1,263		)	(2,324		)		—				(89		)		—			(509		)	—			(217		)	—			(4,402		)
Recoveries	—			—				—				—				—			—			—			—			—			—
Provision	(3,707		)	(1,944		)		(2,673		)		(73		)		—			(2,445		)	(1,195		)	(467		)	(111		)	(12,615		)
Balance at September 30	$	2,619		$	29,320			$	1,923			$	5,774			$	—		$	14,318		$	4,836		$	548		$	179		$	59,517
Three months ended September 30, 2012
Balance at July 1	$	15,983		$	35,991			$	9,194			$	14,724			$	—		$	5,575		$	2,548		$	3,780		$	2		$	87,797
Charge-offs	(1,434		)	(3,006		)		(34		)		(1,901		)		—			(819		)	—			(292		)	(30		)	(7,516		)
Recoveries	—			—				—				—				—			—			—			—			—			—
Provision	3,186			8,159				(4,606		)		(9,114		)		—			4,754			2,946			3,440			1,461			10,226
Balance at September 30	$	17,735		$	41,144			$	4,554			$	3,709			$	—		$	9,510		$	5,494		$	6,928		$	1,433		$	90,507
Allowance for loan and lease losses:
September 30, 2013
ALLL for loans and leases acquired with deteriorated credit quality	$	2,619		$	29,320			$	1,923			$	5,774			$	—		$	14,318		$	4,836		$	548		$	179		$	59,517
December 31, 2012
ALLL for loans and leases acquired with deteriorated credit quality	31,186			50,275				11,234				8,897				—			19,837			9,754			8,287			502			139,972
Loans and leases:
September 30, 2013
Loans and leases acquired with deteriorated credit quality	93,963			744,349				51,108				24,448				—			232,310			34,834			5,337			1,932			1,188,281
December 31, 2012
Loans and leases acquired with deteriorated credit quality	237,906			1,054,473				107,119				49,463				—			297,926			38,710			20,793			2,845			1,809,235
Allowance for Loan and Lease Losses	'
	The following tables provide information on originated impaired loans and leases, exclusive of loans and leases evaluated collectively as a homogeneous group, including interest income recognized in the period during which the loans and leases were considered impaired.
		With a			With no				Total				Unpaid				Related
		recorded			recorded								principal				allowance
		allowance			allowance								balance				recorded
		(dollars in thousands)
	September 30, 2013
	Impaired originated loans and leases
	Construction and land development - commercial	$	1,941		$	349			$	2,290			$	7,364			$	435
	Commercial mortgage	71,829			44,393				116,222				120,254				8,506
	Other commercial real estate	1,210			1,625				2,835				3,131				133
	Commercial and industrial	10,911			371				11,282				11,512				2,500
	Lease financing	309			—				309				309				177
	Other	—			—				—				—				—
	Residential mortgage	11,652			2,681				14,333				14,534				1,113
	Revolving mortgage	4,888			1,607				6,495				6,495				1,167
	Construction and land development - noncommercial	475			463				938				938				52
	Consumer	1,212			—				1,212				1,212				133
	Nonspecific	—			—				—				—				—
	Total impaired originated loans and leases	$	104,427		$	51,489			$	155,916			$	165,749			$	14,216
	December 31, 2012
	Impaired originated loans and leases
	Construction and land development - commercial	$	6,960		$	10,115			$	17,075			$	31,879			$	2,469
	Commercial mortgage	61,644			72,160				133,804				123,964				11,697
	Other commercial real estate	1,552			1,823				3,375				3,348				298
	Commercial and industrial	11,248			11,371				22,619				9,583				2,133
	Lease financing	723			81				804				746				202
	Other	53			654				707				707				53
	Residential mortgage	11,596			4,240				15,836				13,978				959
	Revolving mortgage	1,238			2,965				4,203				4,203				1
	Construction and land development - noncommercial	1,162			159				1,321				1,321				287
	Consumer	1,609			900				2,509				2,509				256
	Nonspecific	—			—				—				—				—
	Total impaired originated loans and leases	$	97,785		$	104,468			$	202,253			$	192,238			$	18,355
	At September 30, 2013, acquired loans that have had an adverse change in expected cash flows since the date of acquisition equaled $514,166, for which $59,517 in related allowance for loan losses has been recorded.
		YTD			YTD Interest Income Recognized
		Average
		Balance
		(dollars in thousands)
	Nine months ended September 30, 2013
	Originated impaired loans and leases:
	Construction and land development - commercial	$	7,793		$	242
	Commercial mortgage	107,929			4,413
	Other commercial real estate	2,893			121
	Commercial and industrial	13,811			533
	Lease financing	399			19
	Other	—			—
	Residential mortgage	15,441			253
	Revolving mortgage	6,337			459
	Construction and land development - noncommercial	907			39
	Consumer	1,508			33
	Total originated impaired loans and leases	$	157,018		$	6,112
	Three months ended September 30, 2013
	Originated impaired loans and leases:
	Construction and land development - commercial	$	5,553		$	29
	Commercial mortgage	117,584			1,575
	Other commercial real estate	2,852			39
	Commercial and industrial	12,136			127
	Lease financing	312			5
	Other	—			—
	Residential mortgage	15,137			181
	Revolving mortgage	6,564			47
	Construction and land development - noncommercial	943			14
	Consumer	1,253			4
Total originated impaired loans and leases	$	162,334		$	2,021
Nine months ended September 30, 2012
Originated impaired loans and leases:
Construction and land development - commercial	$	24,595		$	756
Commercial mortgage	90,544			3,621
Other commercial real estate	2,502			83
Commercial and industrial	11,847			682
Lease financing	412			22
Other	327			—
Residential mortgage	15,278			536
Revolving mortgage	2,507			40
Construction and land development - noncommercial	3,017			122
Consumer	1,631			23
Total originated impaired loans and leases	$	152,660		$	5,885
Three months ended September 30, 2012
Originated impaired loans and leases:
Construction and land development - commercial	$	24,046		$	239
Commercial mortgage	100,751			1,332
Other commercial real estate	2,191			33
Commercial and industrial	13,414			186
Lease financing	689			11
Other	734			—
Residential mortgage	16,111			206
Revolving mortgage	3,592			20
Construction and land development - noncommercial	3,012			33
Consumer	1,978			7
Total originated impaired loans and leases	$	166,518		$	2,067
Allowance for Loan and Lease Losses
Activity in the allowance for loan and lease losses, ending balances of loans and leases and related allowance by class of loans is summarized as follows:
	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
	(dollars in thousands)
Originated Loans
Allowance for loan and lease losses:
Nine months ended September 30, 2013
Balance at January 1	$	6,031		$	80,229			$	2,059			$	14,050			$	3,521		$	1,175		$	3,836		$	25,185		$	1,721		$	25,389		$	15,850		$	179,046
Reclassification (1)	5,141			27,421				(815		)		7,551				(253		)	(1,288		)	5,717			(9,838		)	(478		)	(10,018		)	(15,772		)	7,368
Charge-offs	(4,570		)	(1,662		)		(77		)		(3,917		)		(123		)	(6		)	(1,987		)	(4,540		)	(304		)	(7,601		)	—			(24,787		)
Recoveries	722			740				75				1,003				90			1			353			462			180			1,850			—			5,476
Provision	3,259			(7,695		)		(207		)		3,951				1,358			307			2,126			4,546			(571		)	4,183			(78		)	11,179
Balance at September 30	$	10,583		$	99,033			$	1,035			$	22,638			$	4,593		$	189		$	10,045		$	15,815		$	548		$	13,803		$	—		$	178,282
Nine months ended September 30, 2012
Balance at January 1	$	5,467		$	67,486			$	2,169			$	23,723			$	3,288		$	1,315		$	8,879		$	27,045		$	1,427		$	25,962		$	14,122		$	180,883
Charge-offs	(9,504		)	(5,448		)		(254		)		(3,766		)		(335		)	(28		)	(3,381		)	(7,885		)	(914		)	(7,590		)	—			(39,105		)
Recoveries	370			1,230				6				616				75			4			433			501			168			1,366			—			4,769
Provision	10,134			18,168				318				(6,937		)		419			(115		)	1,255			6,726			1,441			6,944			1,147			39,500
Balance at September 30	$	6,467		$	81,436			$	2,239			$	13,636			$	3,447		$	1,176		$	7,186		$	26,387		$	2,122		$	26,682		$	15,269		$	186,047
Three months ended September 30, 2013
Balance at July 1	$	11,732		$	104,842			$	1,057			$	19,309			$	4,992		$	360		$	9,996		$	14,997		$	720		$	13,777		$	—		$	181,782
Reclassification (1)	—			—				—				—				—			—			—			—			—			—			—			—
Charge-offs	(3,030		)	(794		)		(5		)		(1,671		)		(31		)	—			(719		)	(1,472		)	(59		)	(2,445		)	—			(10,226		)
Recoveries	84			241				39				344				71			—			253			84			101			577			—			1,794
Provision	1,797			(5,256		)		(56		)		4,656				(439		)	(171		)	515			2,206			(214		)	1,894			—			4,932
Balance at September 30	$	10,583		$	99,033			$	1,035			$	22,638			$	4,593		$	189		$	10,045		$	15,815		$	548		$	13,803		$	—		$	178,282
Three months ended September 30, 2012
Balance at July 1	$	5,056		$	81,573			$	2,413			$	14,308			$	3,515		$	1,183		$	7,639		$	26,700		$	1,815		$	24,988		$	15,942		$	185,132
Charge-offs	(283		)	(1,428		)		—				(720		)		—			—			(1,090		)	(1,613		)	(239		)	(2,307		)	—			(7,680		)
Recoveries	101			222				6				179				27			—			121			87			16			439			—			1,198
Provision	1,593			1,069				(180		)		(131		)		(95		)	(7		)	516			1,213			530			3,562			(673		)	7,397
Balance at September 30	$	6,467		$	81,436			$	2,239			$	13,636			$	3,447		$	1,176		$	7,186		$	26,387		$	2,122		$	26,682		$	15,269		$	186,047
(1) Reclassification results from enhancements to the ALLL calculation during the second quarter of 2013 that resulted in the allocation of $15,772 previously designated as 'non-specific' to other loan classes and the absorption of $7,368 of the reserve for unfunded commitments related to unfunded, revocable loan commitments into the ALLL. Further discussion is contained in Note A.
	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
	(dollars in thousands)
Allowance for loan and lease losses:
September 30, 2013
ALLL for loans and leases individually evaluated for impairment	$	435		$	8,506			$	133			$	2,500			$	177		$	—		$	1,113		$	1,167		$	52		$	133		$	—		$	14,216
ALLL for loans and leases collectively evaluated for impairment	10,148			90,527				902				20,138				4,416			189			8,932			14,648			496			13,670			—			164,066
Total allowance for loan and lease losses	$	10,583		$	99,033			$	1,035			$	22,638			$	4,593		$	189		$	10,045		$	15,815		$	548		$	13,803		$	—		$	178,282
December 31, 2012
ALLL for loans and leases individually evaluated for impairment	$	2,469		$	11,697			$	298			$	2,133			$	202		$	53		$	959		$	1		$	287		$	256		$	—		$	18,355
ALLL for loans and leases collectively evaluated for impairment	3,562			68,532				1,761				11,917				3,319			1,122			2,877			25,184			1,434			25,133			—			144,841
Nonspecific ALLL	—			—				—				—				—			—			—			—			—			—			15,850			15,850
Total allowance for loan and lease losses	$	6,031		$	80,229			$	2,059			$	14,050			$	3,521		$	1,175		$	3,836		$	25,185		$	1,721		$	25,389		$	15,850		$	179,046
Loans and leases:
September 30, 2013
Loans and leases individually evaluated for impairment	$	2,290		$	116,222			$	2,835			$	11,282			$	309		$	—		$	14,333		$	6,495		$	938		$	1,212		$	—		$	155,916
Loans and leases collectively evaluated for impairment	297,976			6,191,970				174,764				998,359				365,658			180,435			913,093			2,106,745			120,615			379,054			—			11,728,669
Total loan and leases	$	300,266		$	6,308,192			$	177,599			$	1,009,641			$	365,967		$	180,435		$	927,426		$	2,113,240		$	121,553		$	380,266		$	—		$	11,884,585
December 31, 2012
Loans and leases individually evaluated for impairment	$	17,075		$	133,804			$	3,375			$	22,619			$	804		$	707		$	15,836		$	4,203		$	1,321		$	2,509		$	—		$	202,253
Loans and leases collectively evaluated for impairment	292,115			5,895,631				157,605				1,015,911				329,875			124,974			807,053			2,205,930			130,671			414,097			—			11,373,862
Total loan and leases	$	309,190		$	6,029,435			$	160,980			$	1,038,530			$	330,679		$	125,681		$	822,889		$	2,210,133		$	131,992		$	416,606		$	—		$	11,576,115
	Construction			Commercial				Other				Commercial				Lease			Residential			Revolving			Construction			Consumer			Total
	and land			mortgage				commercial				and				financing			mortgage			mortgage			and land			and other
	development -							real estate				industrial													development -
	commercial																								noncommercial
	(dollars in thousands)
Acquired Loans
Allowance for loan and lease losses:
Nine months ended September 30, 2013
Balance at January 1	$	31,186		$	50,275			$	11,234			$	8,897			$	—		$	19,837		$	9,754		$	8,287		$	502		$	139,972
Charge-offs	(3,435		)	(10,146		)		(6,622		)		(5,190		)		—			(1,973		)	—			—			(2,379		)	(29,745		)
Recoveries	—			—				—				—				—			—			—			—			—			—
Provision	(25,132		)	(10,809		)		(2,689		)		2,067				—			(3,546		)	(4,918		)	(7,739		)	2,056			(50,710		)
Balance at September 30	$	2,619		$	29,320			$	1,923			$	5,774			$	—		$	14,318		$	4,836		$	548		$	179		$	59,517
Nine months ended September 30, 2012
Balance at January 1	$	16,693		$	39,557			$	16,862			$	5,500			$	13		$	5,433		$	77		$	4,652		$	474		$	89,261
Charge-offs	(6,460		)	(18,396		)		(831		)		(7,916		)		—			(3,431		)	—			(301		)	(66		)	(37,401		)
Recoveries	—			—				—				—				—			142			—			—			—			142
Provision	7,502			19,983				(11,477		)		6,125				(13		)	7,366			5,417			2,577			1,025			38,505
Balance at September 30	$	17,735		$	41,144			$	4,554			$	3,709			$	—		$	9,510		$	5,494		$	6,928		$	1,433		$	90,507
Three months ended September 30, 2013
Balance at July 1	$	7,589		$	33,588			$	4,596			$	5,936			$	—		$	17,272		$	6,031		$	1,232		$	290		$	76,534
Charge-offs	(1,263		)	(2,324		)		—				(89		)		—			(509		)	—			(217		)	—			(4,402		)
Recoveries	—			—				—				—				—			—			—			—			—			—
Provision	(3,707		)	(1,944		)		(2,673		)		(73		)		—			(2,445		)	(1,195		)	(467		)	(111		)	(12,615		)
Balance at September 30	$	2,619		$	29,320			$	1,923			$	5,774			$	—		$	14,318		$	4,836		$	548		$	179		$	59,517
Three months ended September 30, 2012
Balance at July 1	$	15,983		$	35,991			$	9,194			$	14,724			$	—		$	5,575		$	2,548		$	3,780		$	2		$	87,797
Charge-offs	(1,434		)	(3,006		)		(34		)		(1,901		)		—			(819		)	—			(292		)	(30		)	(7,516		)
Recoveries	—			—				—				—				—			—			—			—			—			—
Provision	3,186			8,159				(4,606		)		(9,114		)		—			4,754			2,946			3,440			1,461			10,226
Balance at September 30	$	17,735		$	41,144			$	4,554			$	3,709			$	—		$	9,510		$	5,494		$	6,928		$	1,433		$	90,507
Allowance for loan and lease losses:
September 30, 2013
ALLL for loans and leases acquired with deteriorated credit quality	$	2,619		$	29,320			$	1,923			$	5,774			$	—		$	14,318		$	4,836		$	548		$	179		$	59,517
December 31, 2012
ALLL for loans and leases acquired with deteriorated credit quality	31,186			50,275				11,234				8,897				—			19,837			9,754			8,287			502			139,972
Loans and leases:
September 30, 2013
Loans and leases acquired with deteriorated credit quality	93,963			744,349				51,108				24,448				—			232,310			34,834			5,337			1,932			1,188,281
December 31, 2012
Loans and leases acquired with deteriorated credit quality	237,906			1,054,473				107,119				49,463				—			297,926			38,710			20,793			2,845			1,809,235
The following tables provide information on originated impaired loans and leases, exclusive of loans and leases evaluated collectively as a homogeneous group, including interest income recognized in the period during which the loans and leases were considered impaired.
	With a			With no				Total				Unpaid				Related
	recorded			recorded								principal				allowance
	allowance			allowance								balance				recorded
	(dollars in thousands)
September 30, 2013
Impaired originated loans and leases
Construction and land development - commercial	$	1,941		$	349			$	2,290			$	7,364			$	435
Commercial mortgage	71,829			44,393				116,222				120,254				8,506
Other commercial real estate	1,210			1,625				2,835				3,131				133
Commercial and industrial	10,911			371				11,282				11,512				2,500
Lease financing	309			—				309				309				177
Other	—			—				—				—				—
Residential mortgage	11,652			2,681				14,333				14,534				1,113
Revolving mortgage	4,888			1,607				6,495				6,495				1,167
Construction and land development - noncommercial	475			463				938				938				52
Consumer	1,212			—				1,212				1,212				133
Nonspecific	—			—				—				—				—
Total impaired originated loans and leases	$	104,427		$	51,489			$	155,916			$	165,749			$	14,216
December 31, 2012
Impaired originated loans and leases
Construction and land development - commercial	$	6,960		$	10,115			$	17,075			$	31,879			$	2,469
Commercial mortgage	61,644			72,160				133,804				123,964				11,697
Other commercial real estate	1,552			1,823				3,375				3,348				298
Commercial and industrial	11,248			11,371				22,619				9,583				2,133
Lease financing	723			81				804				746				202
Other	53			654				707				707				53
Residential mortgage	11,596			4,240				15,836				13,978				959
Revolving mortgage	1,238			2,965				4,203				4,203				1
Construction and land development - noncommercial	1,162			159				1,321				1,321				287
Consumer	1,609			900				2,509				2,509				256
Nonspecific	—			—				—				—				—
Total impaired originated loans and leases	$	97,785		$	104,468			$	202,253			$	192,238			$	18,355
At September 30, 2013, acquired loans that have had an adverse change in expected cash flows since the date of acquisition equaled $514,166, for which $59,517 in related allowance for loan losses has been recorded.
	YTD			YTD Interest Income Recognized
	Average
	Balance
	(dollars in thousands)
Nine months ended September 30, 2013
Originated impaired loans and leases:
Construction and land development - commercial	$	7,793		$	242
Commercial mortgage	107,929			4,413
Other commercial real estate	2,893			121
Commercial and industrial	13,811			533
Lease financing	399			19
Other	—			—
Residential mortgage	15,441			253
Revolving mortgage	6,337			459
Construction and land development - noncommercial	907			39
Consumer	1,508			33
Total originated impaired loans and leases	$	157,018		$	6,112
Three months ended September 30, 2013
Originated impaired loans and leases:
Construction and land development - commercial	$	5,553		$	29
Commercial mortgage	117,584			1,575
Other commercial real estate	2,852			39
Commercial and industrial	12,136			127
Lease financing	312			5
Other	—			—
Residential mortgage	15,137			181
Revolving mortgage	6,564			47
Construction and land development - noncommercial	943			14
Consumer	1,253			4
Total originated impaired loans and leases	$	162,334		$	2,021
Nine months ended September 30, 2012
Originated impaired loans and leases:
Construction and land development - commercial	$	24,595		$	756
Commercial mortgage	90,544			3,621
Other commercial real estate	2,502			83
Commercial and industrial	11,847			682
Lease financing	412			22
Other	327			—
Residential mortgage	15,278			536
Revolving mortgage	2,507			40
Construction and land development - noncommercial	3,017			122
Consumer	1,631			23
Total originated impaired loans and leases	$	152,660		$	5,885
Three months ended September 30, 2012
Originated impaired loans and leases:
Construction and land development - commercial	$	24,046		$	239
Commercial mortgage	100,751			1,332
Other commercial real estate	2,191			33
Commercial and industrial	13,414			186
Lease financing	689			11
Other	734			—
Residential mortgage	16,111			206
Revolving mortgage	3,592			20
Construction and land development - noncommercial	3,012			33
Consumer	1,978			7
Total originated impaired loans and leases	$	166,518		$	2,067
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 consider. 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 are not initially considered to be TDRs. The following table provides a summary of total TDRs by accrual status.
	September 30, 2013											December 31, 2012
	Accruing			Nonaccruing				Total				Accruing				Nonaccruing			Total
	(dollars in thousands)
Commercial loans
Construction and land development - commercial	$	24,394		$	2,505			$	26,899			$	47,368			$	26,920		$	74,288
Commercial mortgage	105,775			26,669				132,444				151,728				37,603			189,331
Other commercial real estate	3,548			1,330				4,878				10,137				2,194			12,331
Commercial and industrial	10,364			894				11,258				10,940				7,237			18,177
Lease	148			—				148				224				—			224
Total commercial loans	144,229			31,398				175,627				220,397				73,954			294,351
Noncommercial
Residential	24,913			3,996				28,909				28,777				5,828			34,605
Revolving mortgage	3,058			—				3,058				48				—			48
Construction and land development - noncommercial	476			463				939				1,657				—			1,657
Consumer and other	1,212			—				1,212				2,509				—			2,509
Total noncommercial loans	29,659			4,459				34,118				32,991				5,828			38,819
Total loans	$	173,888		$	35,857			$	209,745			$	253,388			$	79,782		$	333,170
Total troubled debt restructurings at September 30, 2013, equaled $209,745, of which $114,231 were acquired and $95,514 were originated. TDRs at December 31, 2012, totaled $333,170, which consisted of $193,207 acquired and $139,963 that were originated.
The majority of TDRs are included in the special mention, substandard or doubtful grading categories, which results in more elevated loss expectations when determining the expected cash flows that are used to determine the allowance for loan losses associated with these loans. 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. Further, TDRs over $500 and graded substandard or lower are evaluated individually for impairment through review of collateral values.
The following tables provide the types of TDRs made during the three months ended September 30, 2013, and 2012, as well as a summary of loans that were modified as a TDR during the 12 months ended September 30, 2013, and 2012 that subsequently defaulted during the three months ended September 30, 2013, and 2012. BancShares defines payment default as movement of the TDR to nonaccrual status, foreclosure or charge-off, whichever occurs first.
.
	Three months ended September 30, 2013									Three months ended September 30, 2012
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
	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
	(dollars in thousands)
Originated loans
Interest only period provided
Commercial mortgage	—	$	—		—	$	—			3	$	1,009			—	$	—
Commercial and industrial	1	203			—	—				2	580				—	—
Total interest only	1	203			—	—				5	1,589				—	—
Loan term extension
Commercial mortgage	5	2,372			4	1,303				10	3,505				4	1,220
Commercial and industrial	—	—			—	—				2	513				—	—
Residential mortgage	2	590			—	—				2	133				—	—
Consumer	1	21			—	—				1	22				—	—
Total loan term extension	8	2,983			4	1,303				15	4,173				4	1,220
Below market interest rate
Construction and land development - commercial	1	45			—	—				—	—				—	—
Commercial mortgage	4	859			5	5,125				3	1,385				—	—
Commercial and industrial	—	—			1	173				1	113				—	—
Residential mortgage	1	319			—	—				1	8				—	—
Revolving mortgage	3	43			1	73				—	—				—	—
Construction & land development - noncommercial	2	42			—	—				—	—				—	—
Total below market interest rate	11	1,308			7	5,371				5	1,506				—	—
Discharged from bankruptcy
Residential mortgage	—	—			2	44				—	—				—	—
Revolving mortgage	3	125			2	47				—	—				—	—
Total discharged from bankruptcy	3	125			4	91				—	—				—	—
Total originated restructurings	23	$	4,619		15	$	6,765			25	$	7,268			4	$	1,220
	Three months ended September 30, 2013									Three months ended September 30, 2012
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
	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
	(dollars in thousands)
Acquired loans
Interest only period provided
Construction and land development - commercial	—	$	—		1	$	2,628			1	$	336			1	$	336
Commercial mortgage	—	—			—	—				3	3,822				1	159
Total interest only	—	—			1	2,628				4	4,158				2	495
Loan term extension
Commercial mortgage	1	157			—	—				—	—				—	—
Commercial and industrial	1	121			—	—				1	118				—	—
Residential mortgage	—	—			1	198				3	5,078				1	4,606
Total loan term extension	2	278			1	198				4	5,196				1	4,606
Below market interest rate
Construction and land development - commercial	—	—			2	1,067				2	52				—	—
Commercial mortgage	1	291			2	1,290				5	3,173				1	1,015
Commercial and industrial	—	—			—	—				1	1,137				—	—
Residential mortgage	—	—			4	842				10	170				4	11
Total below market interest rate	1	291			8	3,199				18	4,532				5	1,026
Total acquired restructurings	3	$	569		10	$	6,025			26	$	13,886			8	$	6,127
For the three months ended September 30, 2013, the recorded investment in troubled debt restructurings 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 the types of TDRs made during the nine months ended September 30, 2013, and 2012, as well as a summary of loans that were modified as a TDR during the 12 months ended September 30, 2013, and 2012 that subsequently defaulted during the
nine months ended September 30, 2013, and 2012. BancShares defines payment default as movement of the TDR to nonaccrual status, foreclosure or charge-off, whichever occurs first.
	Nine months ended September 30, 2013									Nine months ended September 30, 2012
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
	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
	(dollars in thousands)
Originated loans
Interest only period provided
Construction and land development - commercial	—	$	—		—	$	—			2	$	316			—	$	—
Commercial mortgage	9	3,242			—	—				12	4,562				2	952
Commercial and industrial	2	403			—	—				2	580				—	—
Other commercial real estate	1	98			—	—				—	—				—	—
Residential mortgage	1	630			—	—				1	338				1	338
Total interest only	13	4,373			—	—				17	5,796				3	1,290
Loan term extension
Construction and land development - commercial	—	—			—	—				2	7,606				—	—
Commercial mortgage	12	4,935			5	1,524				45	16,314				10	3,389
Other commercial real estate	—	—			—	—				3	1,334				—	—
Commercial and industrial	2	623			—	—				10	1,371				3	150
Lease financing	—	—			—	—				3	172				—	—
Residential mortgage	9	879			1	570				7	493				1	47
Construction and land development - noncommercial	—	—			—	—				1	1,701				—	—
Consumer	2	64			—	—				6	1,124				—	—
Total loan term extension	25	6,501			6	2,094				77	30,115				14	3,586
Below market interest rate
Construction and land development - commercial	2	265			—	—				1	228				—	—
Commercial mortgage	29	10,248			5	5,125				7	5,462				—	—
Commercial and industrial	4	829			1	173				4	226				—	—
Other commercial real estate	3	738			—	—				—	—				—	—
Residential mortgage	14	826			—	—				10	1,853				3	785
Revolving mortgage	6	215			1	73				1	49				1	49
Construction & land development - noncommercial	4	555			—	—				—	—				—	—
Consumer	3	227			—	—				2	11				—	—
Total below market interest rate	65	13,903			7	5,371				25	7,829				4	834
Discharged from bankruptcy
Residential mortgage	4	130			2	44				—	—				—	—
Revolving mortgage	31	2,520			2	47				—	—				—	—
Total discharged from bankruptcy	35	2,650			4	91				—	—				—	—
Other concession
Commercial mortgage	—	—			—	—				2	924				—	—
Residential mortgage	—	—			—	—				1	385				—	—
Total other concession	—	—			—	—				3	1,309				—	—
Total originated restructurings	138	$	27,427		17	$	7,556			122	$	45,049			21	$	5,710
	Nine months ended September 30, 2013									Nine months ended September 30, 2012
	All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
	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
	(dollars in thousands)
Acquired loans
Interest only period provided
Construction and land development - commercial	1	$	2,628		1	$	2,628			2	$	474			1	$	336
Commercial mortgage	2	1,060			2	1,990				4	12,317				1	159
Commercial and industrial	1	23			—	—				1	158				—	—
Residential mortgage	2	181			—	—				1	100				—	—
Total interest only	6	3,892			3	4,618				8	13,049				2	495
Loan term extension
Construction and land development - commercial	5	2,517			—	—				9	5,449				1	2,634
Commercial mortgage	1	157			—	—				2	1,413				—	—
Commercial and industrial	2	1,042			—	—				2	147				—	—
Residential mortgage	1	198			1	198				4	5,125				1	4,606
Total loan term extension	9	3,914			1	198				17	12,134				2	7,240
Below market interest rate
Construction and land development - commercial	5	3,489			2	1,067				10	1,464				2	929
Commercial mortgage	9	11,428			2	1,290				14	13,493				5	2,747
Other commercial real estate	—	—			—	—				2	1,766				—	—
Commercial and industrial	3	510			—	—				4	1,137				2	—
Residential mortgage	10	2,871			6	1,545				18	1,522				7	72
Construction and land development - noncommercial	—	—			—	—				1	—				1	—
Total below market interest rate	27	18,298			10	3,902				49	19,382				17	3,748
Total acquired restructurings	42	$	26,104		14	$	8,718			74	$	44,565			21	$	11,483
Troubled Debt Restructurings on Financing Receivables	'
	The following tables provide the types of TDRs made during the three months ended September 30, 2013, and 2012, as well as a summary of loans that were modified as a TDR during the 12 months ended September 30, 2013, and 2012 that subsequently defaulted during the three months ended September 30, 2013, and 2012. BancShares defines payment default as movement of the TDR to nonaccrual status, foreclosure or charge-off, whichever occurs first.
	.
		Three months ended September 30, 2013									Three months ended September 30, 2012
		All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
		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
		(dollars in thousands)
	Originated loans
	Interest only period provided
	Commercial mortgage	—	$	—		—	$	—			3	$	1,009			—	$	—
	Commercial and industrial	1	203			—	—				2	580				—	—
	Total interest only	1	203			—	—				5	1,589				—	—
	Loan term extension
	Commercial mortgage	5	2,372			4	1,303				10	3,505				4	1,220
	Commercial and industrial	—	—			—	—				2	513				—	—
	Residential mortgage	2	590			—	—				2	133				—	—
	Consumer	1	21			—	—				1	22				—	—
	Total loan term extension	8	2,983			4	1,303				15	4,173				4	1,220
	Below market interest rate
	Construction and land development - commercial	1	45			—	—				—	—				—	—
	Commercial mortgage	4	859			5	5,125				3	1,385				—	—
	Commercial and industrial	—	—			1	173				1	113				—	—
	Residential mortgage	1	319			—	—				1	8				—	—
	Revolving mortgage	3	43			1	73				—	—				—	—
	Construction & land development - noncommercial	2	42			—	—				—	—				—	—
	Total below market interest rate	11	1,308			7	5,371				5	1,506				—	—
	Discharged from bankruptcy
	Residential mortgage	—	—			2	44				—	—				—	—
	Revolving mortgage	3	125			2	47				—	—				—	—
	Total discharged from bankruptcy	3	125			4	91				—	—				—	—
	Total originated restructurings	23	$	4,619		15	$	6,765			25	$	7,268			4	$	1,220
		Three months ended September 30, 2013									Three months ended September 30, 2012
		All restructurings				Restructurings with payment default					All restructurings					Restructurings with payment default
		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
		(dollars in thousands)
	Acquired loans
	Interest only period provided
	Construction and land development - commercial	—	$	—		1	$	2,628			1	$	336			1	$	336
	Commercial mortgage	—	—			—	—				3	3,822				1	159
	Total interest only	—	—			1	2,628				4	4,158				2	495
	Loan term extension
	Commercial mortgage	1	157			—	—				—	—				—	—
	Commercial and industrial	1	121			—	—				1	118				—	—
	Residential mortgage	—	—			1	198				3	5,078				1	4,606
	Total loan term extension	2	278			1	198				4	5,196				1	4,606
	Below market interest rate
	Construction and land development - commercial	—	—			2	1,067				2	52				—	—
	Commercial mortgage	1	291			2	1,290				5	3,173				1	1,015
	Commercial and industrial	—	—			—	—				1	1,137				—	—
	Residential mortgage	—	—			4	842				10	170				4	11
	Total below market interest rate	1	291			8	3,199				18	4,532				5	1,026
	Total acquired restructurings	3	$	569		10	$	6,025			26	$	13,886			8	$	6,127

Other_Real_Estate_Owned_Tables

Other Real Estate Owned (Tables)	9 Months Ended
	Sep. 30, 2013
Banking and Thrift [Abstract]	'
Changes in other real estate owned	'
	The following table explains changes in other real estate owned during the nine months ended September 30, 2013, and 2012.
		Covered			Noncovered			Total
		(dollars in thousands)
	Balance at December 31, 2011	$	148,599		$	50,399		$	198,998
	Additions	89,811			27,552			117,363
	Sales	(100,620		)	(24,960		)	(125,580		)
	Writedowns	(21,385		)	(7,928		)	(29,313		)
	Balance at September 30, 2012	$	116,405		$	45,063		$	161,468
	Balance at December 31, 2012	$	102,577		$	43,513		$	146,090
	Additions	50,365			28,756			79,121
	Sales	(78,597		)	(29,266		)	(107,863		)
	Writedowns	(15,576		)	(2,665		)	(18,241		)
	Balance at September 30, 2013	$	58,769		$	40,338		$	99,107

Receivable_from_FDIC_for_Loss_1

Receivable from FDIC for Loss Share Agreements (Tables)	9 Months Ended
	Sep. 30, 2013
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 and nine-month periods ended September 30, 2013, and 2012.
		Three months ended September 30						Nine months ended September 30
		2013			2012			2013			2012
		(dollars in thousands)
	Balance at beginning of period	$	158,013		$	405,626		$	270,192		$	617,377
	Accretion of discounts and premiums, net	(20,553		)	(32,398		)	(65,734		)	(79,135		)
	Cash payments to/(from) FDIC	1,431			(31,765		)	(45,103		)	(223,863		)
	Post-acquisition and other adjustments, net	(38,338		)	(11,844		)	(58,802		)	15,240
	Balance at end of period	$	100,553		$	329,619		$	100,553		$	329,619

Estimated_Fair_Values_Tables

Estimated Fair Values (Tables)	9 Months Ended
	Sep. 30, 2013
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 September 30, 2013, and December 31, 2012. 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 relating to them that would cause the fair value to differ from the carrying value.
		September 30, 2013				December 31, 2012
		Carrying value		Fair value		Carrying value		Fair value
		(dollars in thousands)
	Cash and due from banks	$	569,118	$	569,118	$	639,730	$	639,730
	Overnight investments	1,354,131		1,354,131		443,180		443,180
	Investment securities available for sale	5,161,585		5,161,585		5,226,228		5,226,228
	Investment securities held to maturity	1,013		1,080		1,342		1,448
	Loans held for sale	43,054		44,819		86,333		87,654
	Acquired loans, net of allowance for loan and lease losses	1,128,764		1,106,189		1,669,263		1,635,878
	Originated loans, net of allowance for loan and lease losses	11,706,303		11,480,252		11,397,069		11,238,597
	Receivable from the FDIC for loss share agreements (1)	100,553		28,450		270,192		100,161
	Income earned not collected	46,110		46,110		47,666		47,666
	Stock issued by:
	Federal Home Loan Bank of Atlanta	31,938		31,938		36,139		36,139
	Federal Home Loan Bank of San Francisco	7,024		7,024		10,107		10,107
	Federal Home Loan Bank of Seattle	4,290		4,290		4,410		4,410
	Preferred stock	31,749		32,996		40,768		40,793
	Deposits	18,063,319		18,089,336		18,086,025		18,126,893
	Short-term borrowings	604,435		604,435		568,505		568,505
	Long-term obligations	510,963		530,080		444,921		472,642
	Payable to the FDIC for loss share agreements	107,419		123,321		101,641		125,065
	Accrued interest payable	6,051		6,051		9,353		9,353
	Interest rate swap	7,909		7,909		10,398		10,398
	(1) The fair value of the FDIC receivable excludes receivable related to accretable yield to be amortized 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 September 30, 2013, and December 31, 2012.
				Fair value measurements using:
	Description	Fair value		Level 1		Level 2		Level 3
		(dollars in thousands)
	September 30, 2013
	Assets measured at fair value
	Investment securities available for sale
	U.S. Treasury	$	448,532	$	—	$	448,532	$	—
	Government agency	2,584,780		—		2,584,780		—
	Mortgage-backed securities	2,106,032		—		2,106,032		—
	Equity securities	21,224		—		21,224		—
	State, county, municipal	187		—		187		—
	Other	830		—		830		—
	Total	$	5,161,585	$	—	$	5,161,585	$	—
	Liabilities measured at fair value
	Interest rate swaps accounted for as cash flow hedges	$	7,909	$	—	$	7,909	$	—
	December 31, 2012
	Assets measured at fair value
	Investment securities available for sale
	U.S. Treasury	$	823,632	$	—	$	823,632	$	—
	Government agency	3,055,204		—		3,055,204		—
	Mortgage-backed securities	1,329,657		—		1,329,657		—
	Equity securities	16,365		—		16,365		—
	State, county, municipal	550		—		550		—
	Other	820		—		820		—
	Total	$	5,226,228	$	—	$	5,226,228	$	—
	Liabilities measured at fair value
	Interest rate swaps accounted for as cash flow hedges	$	10,398	$	—	$	10,398	$	—
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 September 30, 2013, and December 31, 2012.
				Fair value measurements using:
	Description	Fair value		Level 1		Level 2		Level 3
		(dollars in thousands)
	September 30, 2013
	Loans held for sale	$	23,728	$	—	$	23,728	$	—
	Originated impaired loans	90,211		—		—		90,211
	Other real estate not covered under loss share agreements remeasured during current year	4,596		—		—		4,596
	December 31, 2012
	Loans held for sale	65,244		—		65,244		—
	Originated impaired loans	51,644		—		—		51,644
	Other real estate not covered under loss share agreements remeasured during current year	21,113		—		—		21,113
Schedule of Fair Value Measurements Of Other Real Estate Opportunities	'
	OREO is measured and reported at fair value using level 3 inputs for valuations based on unobservable criteria. The values of OREO are determined by 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.
	No financial liabilities were carried at fair value on a nonrecurring basis as of September 30, 2013, and December 31, 2012.

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables) (Defined Benefit Pension)	9 Months Ended
	Sep. 30, 2013
Defined Benefit Pension	'
Defined Benefit Plan Disclosure [Line Items]	'
Schedule of Net Benefit Costs	'
	For the three-month and nine-month periods ended September 30, 2013, and 2012 the components of pension expense are as follows:
		Three months ended September 30						Nine months ended September 30
		2013			2012			2013			2012
		(dollars in thousands)
	Service cost	$	3,765		$	4,012		$	12,248		$	10,387
	Interest cost	5,460			7,151			17,764			17,293
	Expected return on assets	(6,393		)	(8,576		)	(20,798		)	(20,710		)
	Amortization of prior service cost	53			53			158			158
	Amortization of net actuarial loss	4,245			2,735			12,738			8,210
	Total pension expense	$	7,130		$	5,375		$	22,110		$	15,338

Derivatives_Tables

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2013
Derivative [Line Items]	'
Schedule Of Accumulated Other Comprehensive Income (Loss)	'
	Accumulated other comprehensive loss included the following as of September 30, 2013, and December 31, 2012:
		September 30, 2013												December 31, 2012
		Accumulated				Deferred				Accumulated				Accumulated				Deferred			Accumulated
		other				tax				other				other				tax			other
		comprehensive				benefit				comprehensive				comprehensive				expense			comprehensive
		loss								loss,				income (loss)				(benefit)			income (loss),
										net of tax											net of tax
		(dollars in thousands)
	Unrealized (losses) gains on investment securities available for sale	$	(3,189	)		$	(1,365	)		$	(1,824	)		$	33,809			$	13,292		$	20,517
	Funded status of defined benefit plan	(145,438		)		(56,575		)		(88,863		)		(158,334		)		(62,003		)	(96,331		)
	Unrealized loss on cash flow hedge	(7,909		)		(3,051		)		(4,858		)		(10,398		)		(4,106		)	(6,292		)
	Total	$	(156,536	)		$	(60,991	)		$	(95,545	)		$	(134,923	)		$	(52,817	)	$	(82,106	)
	The following table highlights changes in accumulated other comprehensive income by component for three and nine months ended September 30, 2013, and 2012:
			Gains and losses on cash flow hedges1				Unrealized gains and losses on available-for-sale securities1				Defined benefit pension items1				Total
			(dollars in thousands)
	Three months ended September 30, 2013
	Beginning balance		$	(4,959	)		$	(4,117	)		$	(91,100	)		$	(100,176	)
	Other comprehensive income (loss) before reclassifications		(330		)		2,293				—				1,963
	Amounts reclassified from accumulated other comprehensive income		431				—				2,237				2,668
	Net current period other comprehensive income (loss)		101				2,293				2,237				4,631
	Ending balance		$	(4,858	)		$	(1,824	)		$	(88,863	)		$	(95,545	)
	Three months ended September 30, 2012
	Beginning balance		$	(6,670	)		$	17,073			$	(72,810	)		$	(62,407	)
	Other comprehensive income before reclassifications		(555		)		8,834				—				8,279
	Amounts reclassified from accumulated other comprehensive (loss) income		465				(19		)		1,696				2,142
	Net current period other comprehensive (loss) income		(90		)		8,815				1,696				10,421
	Ending balance		$	(6,760	)		$	25,888			$	(71,114	)		$	(51,986	)
	Nine months ended September 30, 2013
	Beginning balance		$	(6,292	)		$	20,517			$	(96,331	)		$	(82,106	)
	Other comprehensive income (loss)before reclassifications		15				(22,341		)		—				(22,326		)
	Amounts reclassified from accumulated other comprehensive income		1,419				—				7,468				8,887
	Net current period other comprehensive income (loss)		1,434				(22,341		)		7,468				(13,439		)
	Ending balance		$	(4,858	)		$	(1,824	)		$	(88,863	)		$	(95,545	)
	Nine months ended September 30, 2012
	Beginning balance		$	(6,484	)		$	16,115			$	(76,205	)		$	(66,574	)
	Other comprehensive (loss) income before reclassifications		(1,664		)		9,794				—				8,130
	Amounts reclassified from accumulated other comprehensive income (loss)		1,388				(21		)		5,091				6,458
	Net current period other comprehensive (loss) income		(276		)		9,773				5,091				14,588
	Ending balance		$	(6,760	)		$	25,888			$	(71,114	)		$	(51,986	)
	1 All amounts are net of tax. Amounts in parentheses indicate debits.
Interest Rate Swap	'
Derivative [Line Items]	'
Schedule Of Interest Rate Swaps	'
		September 30, 2013								December 31, 2012
		Notional  amount				Estimated fair value of liability				Notional  amount				Estimated fair value of liability
		(dollars in thousands)
	2011 interest rate swap hedging variable rate exposure on trust preferred securities 2011-2016	$	93,500			$	7,909			$	93,500			$	10,398
Schedule Of Accumulated Other Comprehensive Income (Loss)	'
	The following table discloses activity in accumulated other comprehensive income (loss) related to the interest rate swap during the nine-month periods ended September 30, 2013, and 2012.
		2013				2012
		(dollars in thousands)
	Accumulated other comprehensive loss resulting from interest rate swaps as of January 1	$	(10,398	)		$	(10,714	)
	Other comprehensive income (loss) recognized during the nine-month period ended September 30	2,489				(456		)
	Accumulated other comprehensive loss resulting from interest rate swaps as of September 30	$	(7,909	)		$	(11,170	)

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2013
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 September 30, 2013, and December 31, 2012:
		September 30, 2013												December 31, 2012
		Accumulated				Deferred				Accumulated				Accumulated				Deferred			Accumulated
		other				tax				other				other				tax			other
		comprehensive				benefit				comprehensive				comprehensive				expense			comprehensive
		loss								loss,				income (loss)				(benefit)			income (loss),
										net of tax											net of tax
		(dollars in thousands)
	Unrealized (losses) gains on investment securities available for sale	$	(3,189	)		$	(1,365	)		$	(1,824	)		$	33,809			$	13,292		$	20,517
	Funded status of defined benefit plan	(145,438		)		(56,575		)		(88,863		)		(158,334		)		(62,003		)	(96,331		)
	Unrealized loss on cash flow hedge	(7,909		)		(3,051		)		(4,858		)		(10,398		)		(4,106		)	(6,292		)
	Total	$	(156,536	)		$	(60,991	)		$	(95,545	)		$	(134,923	)		$	(52,817	)	$	(82,106	)
	The following table highlights changes in accumulated other comprehensive income by component for three and nine months ended September 30, 2013, and 2012:
			Gains and losses on cash flow hedges1				Unrealized gains and losses on available-for-sale securities1				Defined benefit pension items1				Total
			(dollars in thousands)
	Three months ended September 30, 2013
	Beginning balance		$	(4,959	)		$	(4,117	)		$	(91,100	)		$	(100,176	)
	Other comprehensive income (loss) before reclassifications		(330		)		2,293				—				1,963
	Amounts reclassified from accumulated other comprehensive income		431				—				2,237				2,668
	Net current period other comprehensive income (loss)		101				2,293				2,237				4,631
	Ending balance		$	(4,858	)		$	(1,824	)		$	(88,863	)		$	(95,545	)
	Three months ended September 30, 2012
	Beginning balance		$	(6,670	)		$	17,073			$	(72,810	)		$	(62,407	)
	Other comprehensive income before reclassifications		(555		)		8,834				—				8,279
	Amounts reclassified from accumulated other comprehensive (loss) income		465				(19		)		1,696				2,142
	Net current period other comprehensive (loss) income		(90		)		8,815				1,696				10,421
	Ending balance		$	(6,760	)		$	25,888			$	(71,114	)		$	(51,986	)
	Nine months ended September 30, 2013
	Beginning balance		$	(6,292	)		$	20,517			$	(96,331	)		$	(82,106	)
	Other comprehensive income (loss)before reclassifications		15				(22,341		)		—				(22,326		)
	Amounts reclassified from accumulated other comprehensive income		1,419				—				7,468				8,887
	Net current period other comprehensive income (loss)		1,434				(22,341		)		7,468				(13,439		)
	Ending balance		$	(4,858	)		$	(1,824	)		$	(88,863	)		$	(95,545	)
	Nine months ended September 30, 2012
	Beginning balance		$	(6,484	)		$	16,115			$	(76,205	)		$	(66,574	)
	Other comprehensive (loss) income before reclassifications		(1,664		)		9,794				—				8,130
	Amounts reclassified from accumulated other comprehensive income (loss)		1,388				(21		)		5,091				6,458
	Net current period other comprehensive (loss) income		(276		)		9,773				5,091				14,588
	Ending balance		$	(6,760	)		$	25,888			$	(71,114	)		$	(51,986	)
	1 All amounts are net of tax. Amounts in parentheses indicate debits.
Reclassification out of Accumulated Other Comprehensive Income	'
	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)
	Three months ended September 30, 2013
	Gains and losses on cash flow hedges
	Interest rate swap contracts		$	(831	)		Long-term obligations
			400				Income taxes
			$	(431	)		Net income
	Unrealized gains and losses on available for sale securities
			$	—			Securities gains (losses)
			—				Income taxes
			$	—			Net income
	Amortization of defined benefit pension items
	Prior service costs		$	(53	)		Employee benefits
	Actuarial gains		(4,245		)		Employee benefits
			(4,298		)		Income before income taxes
			2,061				Income taxes
			$	(2,237	)		Net income
	Total reclassifications for the period		$	(2,668	)
	Three months ended September 30, 2012
	Gains and losses on cash flow hedges
	Interest rate swap contracts		$	(769	)		Long-term obligations
			304				Income taxes
			$	(465	)		Net income
	Unrealized gains and losses on available for sale securities
			$	31			Securities gains (losses)
			(12		)		Income taxes
			$	19			Net income
	Amortization of defined benefit pension items
	Prior service costs		$	(53	)		Employee benefits
	Actuarial gains		(2,735		)		Employee benefits
			(2,788		)		Income before income taxes
			1,092				Income taxes
			$	(1,696	)		Net income
	Total reclassifications for the period		$	(2,142	)
	1 Amounts in parentheses indicate debits to profit/loss.
	Details about accumulated other comprehensive loss		Amount reclassified from accumulated other comprehensive loss1				Affected line item in the statement where net income is presented
			(dollars in thousands)
	Nine months ended September 30, 2013
	Gains and losses on cash flow hedges
	Interest rate swap contracts		$	(2,463	)		Long-term obligations
			1,044				Income taxes
			$	(1,419	)		Net income
	Unrealized gains and losses on available for sale securities
			$	—			Securities gains (losses)
			—				Income taxes
			$	—			Net income
	Amortization of defined benefit pension items
	Prior service costs		$	(158	)		Employee benefits
	Actuarial gains		(12,738		)		Employee benefits
			(12,896		)		Income before income taxes
			5,428				Income taxes
			$	(7,468	)		Net income
	Total reclassifications for the period		$	(8,887	)
	Nine months ended September 30, 2012
	Gains and losses on cash flow hedges
	Interest rate swap contracts		$	(2,294	)		Long-term obligations
			906				Income taxes
			$	(1,388	)		Net income
	Unrealized gains and losses on available for sale securities
			$	34			Securities gains (losses)
			(13		)		Income taxes
			$	21			Net income
	Amortization of defined benefit pension items
Prior service costs		$	(158	)		Employee benefits
Actuarial gains		(8,210		)		Employee benefits
		(8,368		)		Income before income taxes
		3,277				Income taxes
		$	(5,091	)		Net income
Total reclassifications for the period		$	(6,458	)
1 Amounts in parentheses indicate debits to profit/loss.

Accounting_Policies_and_Basis_1

Accounting Policies and Basis of Presentation Summary of Significant Accounting Policies (Details) (USD $)	Sep. 30, 2013	Aug. 23, 2013
In Thousands, unless otherwise specified
Accounting Policies [Abstract]	'	'
Business Combination Expected Cash Consideration	'	$10,000
Business Combination Expected Exit of TARP	'	8,000
Business Combination Expected Payment to Common Shareholders	'	2,000
Impaired Loans and Leases, Baseline for Meaurement	$500	'

Investments_Aggregate_Values_a

Investments (Aggregate Values and Unrealized Gains and Losses) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Investment securities available for sale	'		'
Cost	$5,164,774		$5,192,419
Gross Unrealized Gains	28,826		34,517
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	32,015		708
Fair Value	5,161,585	[1]	5,226,228	[2]
Investment securities held to maturity	'		'
Cost	1,013	[1]	1,342	[2]
U. S. Treasury	'		'
Investment securities available for sale	'		'
Cost	448,201		823,241
Gross Unrealized Gains	372		403
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	41		12
Fair Value	448,532		823,632
Government Agency	'		'
Investment securities available for sale	'		'
Cost	2,583,888		3,052,040
Gross Unrealized Gains	2,320		3,501
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	1,428		337
Fair Value	2,584,780		3,055,204
Mortgage Backed Securities, Other [Member]	'		'
Investment securities available for sale	'		'
Cost	2,131,099		1,315,211
Gross Unrealized Gains	5,452		14,787
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	30,519		341
Fair Value	2,106,032		1,329,657
Investment securities held to maturity	'		'
Cost	1,013		1,342
Held To Maturity Securities Accumulated Unrecognized Holding Gain	67		133
Held To Maturity Securities Accumulated Unrecognized Holding Loss	0		27
Fair Value	1,080		1,448
Equity Securities	'		'
Investment securities available for sale	'		'
Cost	543		543
Gross Unrealized Gains	20,681		15,822
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	0		0
Fair Value	21,224		16,365
State, County and Municipal	'		'
Investment securities available for sale	'		'
Cost	186		546
Gross Unrealized Gains	1		4
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	0		0
Fair Value	187		550
Other Debt Obligations	'		'
Investment securities available for sale	'		'
Cost	857		838
Gross Unrealized Gains	0		0
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	27		18
Fair Value	$830		$820
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.

Investments_Maturity_Informati

Investments (Maturity Information) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Investment securities available for sale	'		'
Total investment securities available for sale, cost	$5,164,774		$5,192,419
Total investment securities available for sale, fair value	5,161,585	[1]	5,226,228	[2]
Investment securities held to maturity	'		'
Investment securities held to maturity	1,013	[1]	1,342	[2]
Debt Securities	'		'
Investment securities available for sale	'		'
Maturing in one year or less, cost	864,992		2,285,159
Maturing in one through five years, cost	2,168,080		1,590,608
Maturing in five through ten years, cost	60		898
Maturing in over ten years, cost	0		0
Maturing in one year or less, fair value	865,925		2,286,403
Maturing in one through five years, fair value	2,168,344		1,592,923
Maturing in five through ten years, fair value	60		880
Maturing in over ten years, fair value	0		0
Equity Securities	'		'
Investment securities available for sale	'		'
Total investment securities available for sale, cost	543		543
Total investment securities available for sale, fair value	21,224		16,365
Mortgage Backed Securities, Other [Member]	'		'
Investment securities available for sale	'		'
Total investment securities available for sale, cost	2,131,099		1,315,211
Total investment securities available for sale, fair value	2,106,032		1,329,657
Investment securities held to maturity	'		'
Investment securities held to maturity	1,013		1,342
Fair Value	$1,080		$1,448
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.

Investments_Securities_Gains_L

Investments (Securities Gains (Losses)) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments [Abstract]	'	'	'	'
Gross gains on sales of investment securities available for sale	$0	$31	$0	$36
Gross losses on sales of investment securities available for sale	0	0	0	-2
Other than temporary impairment loss on equity securities	0	0	0	-45
Total securities gains (losses)	$0	$31	$0	($11)

Investments_Unrealized_Losses_

Investments (Unrealized Losses) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Investment securities available for sale:	'	'
Less than 12 months, fair value	$2,826,678	$664,243
Available for Sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses Accumulated In Investments	31,208	581
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	32,015	708
12 months or more, fair value	27,949	9,433
Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer Aggregate Losses Acumulated In Investments	807	127
Total fair value	2,854,627	673,676
U. S. Treasury	'	'
Investment securities available for sale:	'	'
Less than 12 months, fair value	51,836	120,045
Available for Sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses Accumulated In Investments	41	12
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	41	12
12 months or more, fair value	0	0
Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer Aggregate Losses Acumulated In Investments	0	0
Total fair value	51,836	120,045
Government Agency	'	'
Investment securities available for sale:	'	'
Less than 12 months, fair value	953,103	407,498
Available for Sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses Accumulated In Investments	1,428	337
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	1,428	337
12 months or more, fair value	0	0
Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer Aggregate Losses Acumulated In Investments	0	0
Total fair value	953,103	407,498
Mortgage Backed Securities, Other [Member]	'	'
Investment securities available for sale:	'	'
Less than 12 months, fair value	1,820,909	135,880
Available for Sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses Accumulated In Investments	29,712	214
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	30,519	341
12 months or more, fair value	27,949	9,433
Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer Aggregate Losses Acumulated In Investments	807	127
Total fair value	1,848,858	145,313
Investment securities held to maturity:	'	'
Less than 12 months, fair value	0	0
Held-to-maturity Securities Continuous Unrealized Loss Position Less Than 12 Months Accumulated Loss	0	0
12 months or more, fair value	0	17
Held-to-maturity Securities Continuous Unrealized Loss Position 12 Months Or Longer Accumulated Loss	0	27
Total fair value	0	17
Held To Maturity Securities Accumulated Unrecognized Holding Loss	0	27
Other Debt Obligations	'	'
Investment securities available for sale:	'	'
Less than 12 months, fair value	830	820
Available for Sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses Accumulated In Investments	27	18
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	27	18
12 months or more, fair value	0	0
Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer Aggregate Losses Acumulated In Investments	0	0
Total fair value	830	820
State, County and Municipal	'	'
Investment securities available for sale:	'	'
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	$0	$0

Investments_Narrative_Details

Investments (Narrative) (Details) (USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	investments
Investments [Abstract]	'	'	'
Investment securities, aggregate fair value, continuous unrealized losses of more than 12 months	$27,949,000	'	'
Investment securities, aggregate unrealized loss, continuous unrealized losses of more than 12 months	807,000	'	'
Number of investments in continuous unrealized loss position for more than twelve months	17	'	'
Unrealized losses related to marketability of securities or issuers ability to honor redemption obligations	0	0	0
Investment value deemed to be OTTI	0	'	'
Investment securities, aggregate carrying value, pledged as collateral	$2,547,581,000	'	$2,351,072,000

Loans_and_Leases_Narrative_Det

Loans and Leases (Narrative) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]	'	'
Noncovered loans pledged to secure debt obligations	$2,534,250	$2,570,773
Charge off of past due business credit card loans (days)	'120 days	'
Ungraded | Business Credit Card Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans to finance buyout, outstanding balance	73,701	'
Ungraded | Tobacco Buyout Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans to finance buyout, outstanding balance	$21,808	'

Loans_and_Leases_Loans_and_Lea

Loans and Leases (Loans and Leases Outstanding) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Acquired	$1,188,281	[1]	$1,809,235	[2]
Originated	11,884,585	[2]	11,576,115	[2]
Total loans and leases	13,072,866		13,385,350
Impaired At Acquisition Date	'		'
Acquired	159,332		290,626
Commercial	'		'
Acquired	914,871		1,450,035
Originated	8,342,100		7,994,495
Commercial | Construction and land development	'		'
Acquired	93,963		237,906
Originated	300,266		309,190
Commercial | Mortgage	'		'
Acquired	744,349		1,054,473
Originated	6,308,192		6,029,435
Commercial | Commercial and industrial	'		'
Acquired	24,448		49,463
Originated	1,009,641		1,038,530
Commercial | Lease financing	'		'
Originated	365,967		330,679
Commercial | Other commercial real estate	'		'
Acquired	51,108		107,119
Originated	177,599		160,980
Commercial | Other	'		'
Acquired	1,003		1,074
Originated	180,435		125,681
Commercial | Impaired At Acquisition Date	'		'
Acquired	113,382		217,807
Commercial | Impaired At Acquisition Date | Construction and land development	'		'
Acquired	23,136		71,225
Commercial | Impaired At Acquisition Date | Mortgage	'		'
Acquired	81,389		107,281
Commercial | Impaired At Acquisition Date | Commercial and industrial	'		'
Acquired	144		3,932
Commercial | Impaired At Acquisition Date | Other commercial real estate	'		'
Acquired	8,713		35,369
Commercial | Impaired At Acquisition Date | Other	'		'
Acquired	0		0
Noncommerical	'		'
Acquired	273,410		359,200
Originated	3,542,485		3,581,620
Noncommerical | Mortgage	'		'
Acquired	232,310		297,926
Originated	927,426		822,889
Noncommerical | Construction and land development	'		'
Acquired	5,337		20,793
Originated	121,553		131,992
Noncommerical | Revolving mortgage	'		'
Acquired	34,834		38,710
Originated	2,113,240		2,210,133
Noncommerical | Consumer	'		'
Acquired	929		1,771
Originated	380,266		416,606
Noncommerical | Impaired At Acquisition Date	'		'
Acquired	45,950		72,819
Noncommerical | Impaired At Acquisition Date | Mortgage	'		'
Acquired	32,389		48,077
Noncommerical | Impaired At Acquisition Date | Construction and land development	'		'
Acquired	5,145		15,136
Noncommerical | Impaired At Acquisition Date | Revolving mortgage	'		'
Acquired	8,416		9,606
Noncommerical | Impaired At Acquisition Date | Consumer	'		'
Acquired	$0		$0
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.

Loans_and_Leases_Loans_Acquire

Loans and Leases (Loans Acquired By Loan Class) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	$1,188,281	[1]	$1,809,235	[2]
Commercial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	914,871		1,450,035
Commercial | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	93,963		237,906
Commercial | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	744,349		1,054,473
Commercial | Other commercial real estate	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	51,108		107,119
Commercial | Commercial and industrial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	24,448		49,463
Commercial | Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	1,003		1,074
Noncommerical	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	273,410		359,200
Noncommerical | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	232,310		297,926
Noncommerical | Revolving mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	34,834		38,710
Noncommerical | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	5,337		20,793
Noncommerical | Consumer	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	929		1,771
Impaired At Acquisition Date	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	159,332		290,626
Impaired At Acquisition Date | Commercial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	113,382		217,807
Impaired At Acquisition Date | Commercial | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	23,136		71,225
Impaired At Acquisition Date | Commercial | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	81,389		107,281
Impaired At Acquisition Date | Commercial | Other commercial real estate	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	8,713		35,369
Impaired At Acquisition Date | Commercial | Commercial and industrial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	144		3,932
Impaired At Acquisition Date | Commercial | Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	0		0
Impaired At Acquisition Date | Noncommerical	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	45,950		72,819
Impaired At Acquisition Date | Noncommerical | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	32,389		48,077
Impaired At Acquisition Date | Noncommerical | Revolving mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	8,416		9,606
Impaired At Acquisition Date | Noncommerical | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	5,145		15,136
Impaired At Acquisition Date | Noncommerical | Consumer	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	0		0
All Other Acquired Loans	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	1,028,949		1,518,609
All Other Acquired Loans | Commercial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	801,489		1,232,228
All Other Acquired Loans | Commercial | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	70,827		166,681
All Other Acquired Loans | Commercial | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	662,960		947,192
All Other Acquired Loans | Commercial | Other commercial real estate	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	42,395		71,750
All Other Acquired Loans | Commercial | Commercial and industrial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	24,304		45,531
All Other Acquired Loans | Commercial | Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	1,003		1,074
All Other Acquired Loans | Noncommerical	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	227,460		286,381
All Other Acquired Loans | Noncommerical | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	199,921		249,849
All Other Acquired Loans | Noncommerical | Revolving mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	26,418		29,104
All Other Acquired Loans | Noncommerical | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	192		5,657
All Other Acquired Loans | Noncommerical | Consumer	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	$929		$1,771
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.

Loans_and_Leases_Composition_o

Loans and Leases (Composition of the Loans and Leases Outstanding By Credit Quality Indicator) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	$1,188,281	[1]	$1,809,235	[2]
Originated	11,884,585	[2]	11,576,115	[2]
Pass	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	515,375		650,661
Special Mention	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	222,170		331,614
Substandard	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	356,937		616,692
Doubtful	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	72,697		182,568
Ungraded	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	21,102		27,700
Commercial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	914,871		1,450,035
Originated	8,342,100		7,994,495
Commercial | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	93,963		237,906
Originated	300,266		309,190
Commercial | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	744,349		1,054,473
Originated	6,308,192		6,029,435
Commercial | Other commercial real estate	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	51,108		107,119
Originated	177,599		160,980
Commercial | Commercial and industrial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	24,448		49,463
Originated	1,009,641		1,038,530
Commercial | Lease financing	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	365,967		330,679
Commercial | Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	1,003		1,074
Originated	180,435		125,681
Commercial | Pass	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	7,900,642		7,459,277
Commercial | Pass | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	3,373		17,010
Originated	285,044		274,480
Commercial | Pass | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	308,809		376,974
Originated	6,019,286		5,688,541
Commercial | Pass | Other commercial real estate	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	22,007		33,570
Originated	172,341		151,549
Commercial | Pass | Commercial and industrial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	7,553		19,451
Originated	885,691		894,998
Commercial | Pass | Lease financing	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	359,195		325,626
Commercial | Pass | Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	179,085		124,083
Commercial | Special Mention	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	159,855		200,073
Commercial | Special Mention | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	18,395		25,734
Originated	12,060		14,666
Commercial | Special Mention | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	176,338		259,264
Originated	125,280		166,882
Commercial | Special Mention | Other commercial real estate	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	6,602		17,518
Originated	1,241		2,812
Commercial | Special Mention | Commercial and industrial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	9,268		12,465
Originated	17,260		13,275
Commercial | Special Mention | Lease financing	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	2,664		1,601
Commercial | Special Mention | Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	1,350		837
Commercial | Substandard	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	172,352		196,257
Commercial | Substandard | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	62,472		105,061
Originated	3,109		18,761
Commercial | Substandard | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	209,383		344,542
Originated	155,593		157,966
Commercial | Substandard | Other commercial real estate	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	13,786		44,335
Originated	3,709		5,038
Commercial | Substandard | Commercial and industrial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	5,908		14,698
Originated	6,606		12,073
Commercial | Substandard | Lease financing	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	3,335		1,663
Commercial | Substandard | Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	0		756
Commercial | Doubtful	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	9,032		16,336
Commercial | Doubtful | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	8,013		87,445
Originated	53		952
Commercial | Doubtful | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	49,165		73,016
Originated	6,703		13,475
Commercial | Doubtful | Other commercial real estate	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	8,713		11,696
Originated	75		98
Commercial | Doubtful | Commercial and industrial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	1,502		2,757
Originated	1,428		1,040
Commercial | Doubtful | Lease financing	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	773		771
Commercial | Doubtful | Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	0		0
Commercial | Ungraded	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	100,219		122,552
Commercial | Ungraded | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	1,710		2,656
Originated	0		331
Commercial | Ungraded | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	654		677
Originated	1,330		2,571
Commercial | Ungraded | Other commercial real estate	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	0		0
Originated	233		1,483
Commercial | Ungraded | Commercial and industrial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	217		92
Originated	98,656		117,144
Commercial | Ungraded | Lease financing	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	0		1,018
Commercial | Ungraded | Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Originated	0		5
Noncommerical	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	273,410		359,200
Originated	3,542,485		3,581,620
Noncommerical | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	232,310		297,926
Originated	927,426		822,889
Noncommerical | Revolving mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	34,834		38,710
Originated	2,113,240		2,210,133
Noncommerical | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	5,337		20,793
Originated	121,553		131,992
Noncommerical | Consumer	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	929		1,771
Originated	380,266		416,606
Noncommerical | Consumer and Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	1,932		2,845
Noncommerical | Pass | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	145,735		172,165
Noncommerical | Pass | Revolving mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	26,291		29,540
Noncommerical | Pass | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	139		334
Noncommerical | Pass | Consumer and Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	1,468		1,617
Noncommerical | Special Mention | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	8,676		14,863
Noncommerical | Special Mention | Revolving mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	2,865		1,736
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	26		34
Noncommerical | Substandard | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	57,156		83,193
Noncommerical | Substandard | Revolving mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	3,329		7,434
Noncommerical | Substandard | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	4,903		17,190
Noncommerical | Substandard | Consumer and Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	0		239
Noncommerical | Doubtful | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	2,660		4,268
Noncommerical | Doubtful | Revolving mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	2,349		0
Noncommerical | Doubtful | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	295		3,269
Noncommerical | Doubtful | Consumer and Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	0		117
Noncommerical | Ungraded | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	18,083		23,437
Noncommerical | Ungraded | Revolving mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	0		0
Noncommerical | Ungraded | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	0		0
Noncommerical | Ungraded | Consumer and Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Acquired	438		838
Originated Loans	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	11,779,490		11,441,555
Originated	11,884,585		11,576,115
30-59 Days Past Due	48,895		64,528
60-89 Days Past Due	17,735		19,620
90 Days or Greater	38,465		50,412
Originated Loans | Commercial | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	297,900		300,385
Originated	300,266		309,190
30-59 Days Past Due	1,755		927
60-89 Days Past Due	49		0
90 Days or Greater	562		7,878
Originated Loans | Commercial | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	6,263,304		5,979,482
Originated	6,308,192		6,029,435
30-59 Days Past Due	15,917		24,447
60-89 Days Past Due	10,522		4,179
90 Days or Greater	18,449		21,327
Originated Loans | Commercial | Other commercial real estate	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	175,927		158,319
Originated	177,599		160,980
30-59 Days Past Due	103		387
60-89 Days Past Due	400		1,240
90 Days or Greater	1,169		1,034
Originated Loans | Commercial | Commercial and industrial	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	1,004,537		1,033,996
Originated	1,009,641		1,038,530
30-59 Days Past Due	2,633		2,833
60-89 Days Past Due	796		1,096
90 Days or Greater	1,675		605
Originated Loans | Commercial | Lease financing	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	363,472		328,929
Originated	365,967		330,679
30-59 Days Past Due	2,317		991
60-89 Days Past Due	0		138
90 Days or Greater	178		621
Originated Loans | Commercial | Other	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	180,435		125,650
Originated	180,435		125,681
30-59 Days Past Due	0		18
60-89 Days Past Due	0		13
90 Days or Greater	0		0
Originated Loans | Noncommerical	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	3,493,915		3,514,794
Originated	3,542,485		3,581,620
30-59 Days Past Due	26,170		34,925
60-89 Days Past Due	5,968		12,954
90 Days or Greater	16,432		18,947
Originated Loans | Noncommerical | Mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	900,625		786,626
Originated	927,426		822,889
30-59 Days Past Due	11,840		15,711
60-89 Days Past Due	3,312		7,559
90 Days or Greater	11,649		12,993
Originated Loans | Noncommerical | Revolving mortgage	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	2,097,658		2,190,186
Originated	2,113,240		2,210,133
30-59 Days Past Due	9,921		12,868
60-89 Days Past Due	1,556		3,200
90 Days or Greater	4,105		3,879
Originated Loans | Noncommerical | Construction and land development	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	119,395		128,764
Originated	121,553		131,992
30-59 Days Past Due	1,907		1,941
60-89 Days Past Due	85		490
90 Days or Greater	166		797
Originated Loans | Noncommerical | Consumer	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Current	376,237		409,218
Originated	380,266		416,606
30-59 Days Past Due	2,502		4,405
60-89 Days Past Due	1,015		1,705
90 Days or Greater	$512		$1,278
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.

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 $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	$11,884,585	[1]	$11,576,115	[1]
Commercial	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	8,342,100		7,994,495
Commercial | Construction and land development	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	300,266		309,190
Commercial | Mortgage	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	6,308,192		6,029,435
Commercial | Other commercial real estate	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	177,599		160,980
Commercial | Commercial and industrial	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	1,009,641		1,038,530
Commercial | Lease financing	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	365,967		330,679
Commercial | Other	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	180,435		125,681
Noncommerical	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	3,542,485		3,581,620
Noncommerical | Mortgage	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	927,426		822,889
Noncommerical | Revolving mortgage	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	2,113,240		2,210,133
Noncommerical | Construction and land development	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	121,553		131,992
Noncommerical | Consumer	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Total Loans and Leases	380,266		416,606
Originated Loans	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	48,895		64,528
60-89 Days Past Due	17,735		19,620
90 Days or Greater	38,465		50,412
Total	105,095		134,560
Current	11,779,490		11,441,555
Total Loans and Leases	11,884,585		11,576,115
Originated Loans | Commercial | Construction and land development	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	1,755		927
60-89 Days Past Due	49		0
90 Days or Greater	562		7,878
Total	2,366		8,805
Current	297,900		300,385
Total Loans and Leases	300,266		309,190
Originated Loans | Commercial | Mortgage	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	15,917		24,447
60-89 Days Past Due	10,522		4,179
90 Days or Greater	18,449		21,327
Total	44,888		49,953
Current	6,263,304		5,979,482
Total Loans and Leases	6,308,192		6,029,435
Originated Loans | Commercial | Other commercial real estate	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	103		387
60-89 Days Past Due	400		1,240
90 Days or Greater	1,169		1,034
Total	1,672		2,661
Current	175,927		158,319
Total Loans and Leases	177,599		160,980
Originated Loans | Commercial | Commercial and industrial	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	2,633		2,833
60-89 Days Past Due	796		1,096
90 Days or Greater	1,675		605
Total	5,104		4,534
Current	1,004,537		1,033,996
Total Loans and Leases	1,009,641		1,038,530
Originated Loans | Commercial | Lease financing	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	2,317		991
60-89 Days Past Due	0		138
90 Days or Greater	178		621
Total	2,495		1,750
Current	363,472		328,929
Total Loans and Leases	365,967		330,679
Originated Loans | Commercial | Other	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	0		18
60-89 Days Past Due	0		13
90 Days or Greater	0		0
Total	0		31
Current	180,435		125,650
Total Loans and Leases	180,435		125,681
Originated Loans | Noncommerical	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	26,170		34,925
60-89 Days Past Due	5,968		12,954
90 Days or Greater	16,432		18,947
Current	3,493,915		3,514,794
Total Loans and Leases	3,542,485		3,581,620
Originated Loans | Noncommerical | Mortgage	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	11,840		15,711
60-89 Days Past Due	3,312		7,559
90 Days or Greater	11,649		12,993
Total	26,801		36,263
Current	900,625		786,626
Total Loans and Leases	927,426		822,889
Originated Loans | Noncommerical | Revolving mortgage	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	9,921		12,868
60-89 Days Past Due	1,556		3,200
90 Days or Greater	4,105		3,879
Total	15,582		19,947
Current	2,097,658		2,190,186
Total Loans and Leases	2,113,240		2,210,133
Originated Loans | Noncommerical | Construction and land development	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	1,907		1,941
60-89 Days Past Due	85		490
90 Days or Greater	166		797
Total	2,158		3,228
Current	119,395		128,764
Total Loans and Leases	121,553		131,992
Originated Loans | Noncommerical | Consumer	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
30-59 Days Past Due	2,502		4,405
60-89 Days Past Due	1,015		1,705
90 Days or Greater	512		1,278
Total	4,029		7,388
Current	376,237		409,218
Total Loans and Leases	$380,266		$416,606
[1]	Derived from 2012 Annual Report on Form 10-K.

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 $)

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

In Thousands, unless otherwise specified

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Originated Loans

Construction and land development

Construction and land development

Mortgage

Mortgage

Other commercial real estate

Other commercial real estate

Commercial and industrial

Commercial and industrial

Lease financing

Lease financing

Mortgage

Mortgage

Construction and land development

Construction and land development

Revolving mortgage

Revolving mortgage

Consumer and Other

Consumer and Other

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Commercial

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Noncommerical

Construction and land development

Construction and land development

Mortgage

Mortgage

Other commercial real estate

Other commercial real estate

Commercial and industrial

Commercial and industrial

Lease financing

Lease financing

Mortgage

Mortgage

Construction and land development

Construction and land development

Revolving mortgage

Revolving mortgage

Consumer

Consumer

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Nonaccruing

$35,857

$79,782

$31,398

$73,954

$2,505

$26,920

$26,669

$37,603

$1,330

$2,194

$894

$7,237

$0

$0

$4,459

$5,828

$3,996

$5,828

$463

$0

$0

$0

$0

$0

$66,840

$89,845

$493

$14,930

$44,818

$50,532

$1,937

$2,319

$2,978

$6,972

$1,000

$1,075

$15,119

$12,603

$463

$668

$0

$0

$32

$746

Loans and leases greater than 90 days and accruing

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

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$9,363

$11,272

$164

$541

$601

$1,671

$800

$0

$238

$466

$69

$0

$2,708

$3,337

$166

$111

$4,105

$3,877

$512

$1,269

Loans_and_Leases_Changes_In_Ca

Loans and Leases (Changes In Carrying Value Of Acquired Impaired Loans) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Dec. 31, 2012
	Impaired At Acquisition Date	Impaired At Acquisition Date	All Other Acquired Loans	All Other Acquired Loans	Loans on the Cost Recovery Method	Loans on the Cost Recovery Method
Carrying Value of Acquired Impaired Loans [Roll Forward]	'	'	'	'	'	'
Beginning balance	$290,626	$458,305	$1,518,609	$1,903,847	$29,194	$74,479
Reductions for repayments, foreclosures and changes in carrying value, net of accretion	-131,294	-167,581	-489,660	-297,474	'	'
Ending balance	159,332	290,724	1,028,949	1,606,373	29,194	74,479
Outstanding principal balance	$670,256	$1,077,975	$1,412,617	$2,253,660	'	'

Loans_and_Leases_Changes_In_Ca1

Loans and Leases (Changes In Carrying Amount Of Accretable Yield) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Changes in Amount of Accretable Yield [Roll Forward]	'	'
Beginning balance	$539,564	$276,690
Accretion	-179,792	-193,438
Other, net	107,300	498,874
Ending balance	$467,072	$582,126

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			9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Reclassification	'		'	$7,368		$0	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Net loans and leases	12,835,067	[1]	'	12,835,067	[1]	'	13,066,332	[2]
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'		'	'		'	'
Allowance for loan and lease losses	237,799	[1]	'	237,799	[1]	'	319,018	[2]
Noncommerical	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Reclassification	'		'	7,368	[3]	'	'
Noncommerical | Non-specific	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Reclassification	'		'	-15,772	[3]	'	'
Originated Loans	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	181,782		185,132	179,046		180,883	'
Reclassification	0	[3]	'	7,368	[3]	'	'
Charge-offs	-10,226		-7,680	-24,787		-39,105	'
Recoveries	1,794		1,198	5,476		4,769	'
Provisions	4,932		7,397	11,179		39,500	'
Ending balance	178,282		186,047	178,282		186,047	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	14,216		'	14,216		'	18,355
ALLL for loans and leases collectively evaluated for impairment	164,066		'	164,066		'	144,841
Non-specific ALLL	'		'	'		'	15,850
Total allowance for loan and lease losses	178,282		186,047	178,282		186,047	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	155,916		'	155,916		'	202,253
Loans and leases collectively evaluated for impairment	11,728,669		'	11,728,669		'	11,373,862
Net loans and leases	11,884,585		'	11,884,585		'	11,576,115
Originated Loans | Commercial | Construction and land development	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	11,732		5,056	6,031		5,467	'
Reclassification	0	[3]	'	5,141	[3]	'	'
Charge-offs	-3,030		-283	-4,570		-9,504	'
Recoveries	84		101	722		370	'
Provisions	1,797		1,593	3,259		10,134	'
Ending balance	10,583		6,467	10,583		6,467	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	435		'	435		'	2,469
ALLL for loans and leases collectively evaluated for impairment	10,148		'	10,148		'	3,562
Non-specific ALLL	'		'	'		'	0
Total allowance for loan and lease losses	10,583		6,467	10,583		6,467	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	2,290		'	2,290		'	17,075
Loans and leases collectively evaluated for impairment	297,976		'	297,976		'	292,115
Net loans and leases	300,266		'	300,266		'	309,190
Originated Loans | Commercial | Mortgage	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	104,842		81,573	80,229		67,486	'
Reclassification	0	[3]	'	27,421	[3]	'	'
Charge-offs	-794		-1,428	-1,662		-5,448	'
Recoveries	241		222	740		1,230	'
Provisions	-5,256		1,069	-7,695		18,168	'
Ending balance	99,033		81,436	99,033		81,436	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	8,506		'	8,506		'	11,697
ALLL for loans and leases collectively evaluated for impairment	90,527		'	90,527		'	68,532
Non-specific ALLL	'		'	'		'	0
Total allowance for loan and lease losses	99,033		81,436	99,033		81,436	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	116,222		'	116,222		'	133,804
Loans and leases collectively evaluated for impairment	6,191,970		'	6,191,970		'	5,895,631
Net loans and leases	6,308,192		'	6,308,192		'	6,029,435
Originated Loans | Commercial | Other commercial real estate	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	1,057		2,413	2,059		2,169	'
Reclassification	0	[3]	'	-815	[3]	'	'
Charge-offs	-5		0	-77		-254	'
Recoveries	39		6	75		6	'
Provisions	-56		-180	-207		318	'
Ending balance	1,035		2,239	1,035		2,239	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	133		'	133		'	298
ALLL for loans and leases collectively evaluated for impairment	902		'	902		'	1,761
Non-specific ALLL	'		'	'		'	0
Total allowance for loan and lease losses	1,035		2,239	1,035		2,239	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	2,835		'	2,835		'	3,375
Loans and leases collectively evaluated for impairment	174,764		'	174,764		'	157,605
Net loans and leases	177,599		'	177,599		'	160,980
Originated Loans | Commercial | Commercial and industrial	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	19,309		14,308	14,050		23,723	'
Reclassification	0	[3]	'	7,551	[3]	'	'
Charge-offs	-1,671		-720	-3,917		-3,766	'
Recoveries	344		179	1,003		616	'
Provisions	4,656		-131	3,951		-6,937	'
Ending balance	22,638		13,636	22,638		13,636	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	2,500		'	2,500		'	2,133
ALLL for loans and leases collectively evaluated for impairment	20,138		'	20,138		'	11,917
Non-specific ALLL	'		'	'		'	0
Total allowance for loan and lease losses	22,638		13,636	22,638		13,636	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	11,282		'	11,282		'	22,619
Loans and leases collectively evaluated for impairment	998,359		'	998,359		'	1,015,911
Net loans and leases	1,009,641		'	1,009,641		'	1,038,530
Originated Loans | Commercial | Lease financing	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	4,992		3,515	3,521		3,288	'
Reclassification	0	[3]	'	-253	[3]	'	'
Charge-offs	-31		0	-123		-335	'
Recoveries	71		27	90		75	'
Provisions	-439		-95	1,358		419	'
Ending balance	4,593		3,447	4,593		3,447	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	177		'	177		'	202
ALLL for loans and leases collectively evaluated for impairment	4,416		'	4,416		'	3,319
Non-specific ALLL	'		'	'		'	0
Total allowance for loan and lease losses	4,593		3,447	4,593		3,447	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	309		'	309		'	804
Loans and leases collectively evaluated for impairment	365,658		'	365,658		'	329,875
Net loans and leases	365,967		'	365,967		'	330,679
Originated Loans | Commercial | Other	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	360		1,183	1,175		1,315	'
Reclassification	0	[3]	'	-1,288	[3]	'	'
Charge-offs	0		0	-6		-28	'
Recoveries	0		0	1		4	'
Provisions	-171		-7	307		-115	'
Ending balance	189		1,176	189		1,176	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	0		'	0		'	53
ALLL for loans and leases collectively evaluated for impairment	189		'	189		'	1,122
Non-specific ALLL	'		'	'		'	0
Total allowance for loan and lease losses	189		1,176	189		1,176	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	0		'	0		'	707
Loans and leases collectively evaluated for impairment	180,435		'	180,435		'	124,974
Net loans and leases	180,435		'	180,435		'	125,681
Originated Loans | Noncommerical | Mortgage	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	9,996		7,639	3,836		8,879	'
Reclassification	0	[3]	'	5,717	[3]	'	'
Charge-offs	-719		-1,090	-1,987		-3,381	'
Recoveries	253		121	353		433	'
Provisions	515		516	2,126		1,255	'
Ending balance	10,045		7,186	10,045		7,186	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	1,113		'	1,113		'	959
ALLL for loans and leases collectively evaluated for impairment	8,932		'	8,932		'	2,877
Non-specific ALLL	'		'	'		'	0
Total allowance for loan and lease losses	10,045		7,186	10,045		7,186	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	14,333		'	14,333		'	15,836
Loans and leases collectively evaluated for impairment	913,093		'	913,093		'	807,053
Net loans and leases	927,426		'	927,426		'	822,889
Originated Loans | Noncommerical | Construction and land development	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	720		1,815	1,721		1,427	'
Reclassification	0	[3]	'	-478	[3]	'	'
Charge-offs	-59		-239	-304		-914	'
Recoveries	101		16	180		168	'
Provisions	-214		530	-571		1,441	'
Ending balance	548		2,122	548		2,122	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	52		'	52		'	287
ALLL for loans and leases collectively evaluated for impairment	496		'	496		'	1,434
Non-specific ALLL	'		'	'		'	0
Total allowance for loan and lease losses	548		2,122	548		2,122	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	938		'	938		'	1,321
Loans and leases collectively evaluated for impairment	120,615		'	120,615		'	130,671
Net loans and leases	121,553		'	121,553		'	131,992
Originated Loans | Noncommerical | Revolving mortgage	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	14,997		26,700	25,185		27,045	'
Reclassification	0	[3]	'	-9,838	[3]	'	'
Charge-offs	-1,472		-1,613	-4,540		-7,885	'
Recoveries	84		87	462		501	'
Provisions	2,206		1,213	4,546		6,726	'
Ending balance	15,815		26,387	15,815		26,387	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	1,167		'	1,167		'	1
ALLL for loans and leases collectively evaluated for impairment	14,648		'	14,648		'	25,184
Non-specific ALLL	'		'	'		'	0
Total allowance for loan and lease losses	15,815		26,387	15,815		26,387	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	6,495		'	6,495		'	4,203
Loans and leases collectively evaluated for impairment	2,106,745		'	2,106,745		'	2,205,930
Net loans and leases	2,113,240		'	2,113,240		'	2,210,133
Originated Loans | Noncommerical | Consumer	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	13,777		24,988	25,389		25,962	'
Reclassification	0	[3]	'	-10,018	[3]	'	'
Charge-offs	-2,445		-2,307	-7,601		-7,590	'
Recoveries	577		439	1,850		1,366	'
Provisions	1,894		3,562	4,183		6,944	'
Ending balance	13,803		26,682	13,803		26,682	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	133		'	133		'	256
ALLL for loans and leases collectively evaluated for impairment	13,670		'	13,670		'	25,133
Non-specific ALLL	'		'	'		'	0
Total allowance for loan and lease losses	13,803		26,682	13,803		26,682	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	1,212		'	1,212		'	2,509
Loans and leases collectively evaluated for impairment	379,054		'	379,054		'	414,097
Net loans and leases	380,266		'	380,266		'	416,606
Originated Loans | Noncommerical | Non-specific	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	0		15,942	15,850		14,122	'
Reclassification	0	[3]	'	-15,772	[3]	'	'
Charge-offs	0		0	0		0	'
Recoveries	0		0	0		0	'
Provisions	0		-673	-78		1,147	'
Ending balance	0		15,269	0		15,269	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
ALLL for loans and leases individually evaluated for impairment	0		'	0		'	0
ALLL for loans and leases collectively evaluated for impairment	0		'	0		'	0
Non-specific ALLL	'		'	'		'	15,850
Total allowance for loan and lease losses	0		15,269	0		15,269	'
Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Loans and leases individually evaluated for impairment	0		'	0		'	0
Loans and leases collectively evaluated for impairment	0		'	0		'	0
Net loans and leases	0		'	0		'	0
Acquired Loans	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	76,534		87,797	139,972		89,261	'
Charge-offs	-4,402		-7,516	-29,745		-37,401	'
Recoveries	0		0	0		142	'
Provisions	-12,615		10,226	-50,710		38,505	'
Ending balance	59,517		90,507	59,517		90,507	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Total allowance for loan and lease losses	59,517		90,507	59,517		90,507	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'		'	'		'	'
ALLL for loans and leases acquired with deteriorated credit quality	59,517		'	59,517		'	139,972
Loans and leases acquired with deteriorated credit quality	1,188,281		'	1,188,281		'	1,809,235
Acquired Loans | Commercial | Construction and land development	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	7,589		15,983	31,186		16,693	'
Charge-offs	-1,263		-1,434	-3,435		-6,460	'
Recoveries	0		0	0		0	'
Provisions	-3,707		3,186	-25,132		7,502	'
Ending balance	2,619		17,735	2,619		17,735	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Total allowance for loan and lease losses	2,619		17,735	2,619		17,735	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'		'	'		'	'
ALLL for loans and leases acquired with deteriorated credit quality	2,619		'	2,619		'	31,186
Loans and leases acquired with deteriorated credit quality	93,963		'	93,963		'	237,906
Acquired Loans | Commercial | Mortgage	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	33,588		35,991	50,275		39,557	'
Charge-offs	-2,324		-3,006	-10,146		-18,396	'
Recoveries	0		0	0		0	'
Provisions	-1,944		8,159	-10,809		19,983	'
Ending balance	29,320		41,144	29,320		41,144	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Total allowance for loan and lease losses	29,320		41,144	29,320		41,144	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'		'	'		'	'
ALLL for loans and leases acquired with deteriorated credit quality	29,320		'	29,320		'	50,275
Loans and leases acquired with deteriorated credit quality	744,349		'	744,349		'	1,054,473
Acquired Loans | Commercial | Other commercial real estate	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	4,596		9,194	11,234		16,862	'
Charge-offs	0		-34	-6,622		-831	'
Recoveries	0		0	0		0	'
Provisions	-2,673		-4,606	-2,689		-11,477	'
Ending balance	1,923		4,554	1,923		4,554	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Total allowance for loan and lease losses	1,923		4,554	1,923		4,554	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'		'	'		'	'
ALLL for loans and leases acquired with deteriorated credit quality	1,923		'	1,923		'	11,234
Loans and leases acquired with deteriorated credit quality	51,108		'	51,108		'	107,119
Acquired Loans | Commercial | Commercial and industrial	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	5,936		14,724	8,897		5,500	'
Charge-offs	-89		-1,901	-5,190		-7,916	'
Recoveries	0		0	0		0	'
Provisions	-73		-9,114	2,067		6,125	'
Ending balance	5,774		3,709	5,774		3,709	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Total allowance for loan and lease losses	5,774		3,709	5,774		3,709	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'		'	'		'	'
ALLL for loans and leases acquired with deteriorated credit quality	5,774		'	5,774		'	8,897
Loans and leases acquired with deteriorated credit quality	24,448		'	24,448		'	49,463
Acquired Loans | Commercial | Lease financing	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	0		0	0		13	'
Charge-offs	0		0	0		0	'
Recoveries	0		0	0		0	'
Provisions	0		0	0		-13	'
Ending balance	0		0	0		0	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Total allowance for loan and lease losses	0		0	0		0	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'		'	'		'	'
ALLL for loans and leases acquired with deteriorated credit quality	0		'	0		'	0
Loans and leases acquired with deteriorated credit quality	0		'	0		'	0
Acquired Loans | Noncommerical | Mortgage	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	17,272		5,575	19,837		5,433	'
Charge-offs	-509		-819	-1,973		-3,431	'
Recoveries	0		0	0		142	'
Provisions	-2,445		4,754	-3,546		7,366	'
Ending balance	14,318		9,510	14,318		9,510	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Total allowance for loan and lease losses	14,318		9,510	14,318		9,510	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'		'	'		'	'
ALLL for loans and leases acquired with deteriorated credit quality	14,318		'	14,318		'	19,837
Loans and leases acquired with deteriorated credit quality	232,310		'	232,310		'	297,926
Acquired Loans | Noncommerical | Construction and land development	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	1,232		3,780	8,287		4,652	'
Charge-offs	-217		-292	0		-301	'
Recoveries	0		0	0		0	'
Provisions	-467		3,440	-7,739		2,577	'
Ending balance	548		6,928	548		6,928	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Total allowance for loan and lease losses	548		6,928	548		6,928	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'		'	'		'	'
ALLL for loans and leases acquired with deteriorated credit quality	548		'	548		'	8,287
Loans and leases acquired with deteriorated credit quality	5,337		'	5,337		'	20,793
Acquired Loans | Noncommerical | Revolving mortgage	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	6,031		2,548	9,754		77	'
Charge-offs	0		0	0		0	'
Recoveries	0		0	0		0	'
Provisions	-1,195		2,946	-4,918		5,417	'
Ending balance	4,836		5,494	4,836		5,494	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Total allowance for loan and lease losses	4,836		5,494	4,836		5,494	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'		'	'		'	'
ALLL for loans and leases acquired with deteriorated credit quality	4,836		'	4,836		'	9,754
Loans and leases acquired with deteriorated credit quality	34,834		'	34,834		'	38,710
Acquired Loans | Noncommerical | Consumer and Other	'		'	'		'	'
Allowance for Loan and Lease Losses [Roll Forward]	'		'	'		'	'
Beginning balance	290		2	502		474	'
Charge-offs	0		-30	-2,379		-66	'
Recoveries	0		0	0		0	'
Provisions	-111		1,461	2,056		1,025	'
Ending balance	179		1,433	179		1,433	'
Allowance for Loans and Leases Evaluated for Impairment [Abstract]	'		'	'		'	'
Total allowance for loan and lease losses	179		1,433	179		1,433	'
Loan and Lease Acquired with Deteriorated Credit Quality [Abstract]	'		'	'		'	'
ALLL for loans and leases acquired with deteriorated credit quality	179		'	179		'	502
Loans and leases acquired with deteriorated credit quality	$1,932		'	$1,932		'	$2,845
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.
[3]	(1) Reclassification results from enhancements to the ALLL calculation during the second quarter of 2013 that resulted in the allocation of $15,772 previously designated as 'non-specific' to other loan classes and the absorption of $7,368 of the reserve for unfunded commitments related to unfunded, revocable loan commitments into the ALLL. Further discussion is contained in Note A.

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			9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	'		'	$7,368		$0	'
Allowance for loan and lease losses	237,799	[1]	'	237,799	[1]	'	319,018	[2]
Noncommerical	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	'		'	7,368	[3]	'	'
Noncommerical | Non-specific	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	'		'	-15,772	[3]	'	'
Originated Loans	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	7,368	[3]	'	'
Unpaid principal balance	165,749		'	165,749		'	192,238
ALLL for loans and leases individually evaluated for impairment	14,216		'	14,216		'	18,355
Financing Receivable, Individually Evaluated for Impairment	155,916		'	155,916		'	202,253
Average balance	162,334		166,518	157,018		152,660	'
Interest income recognized	2,021		2,067	6,112		5,885	'
Originated Loans | Commercial | Construction and land development	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	5,141	[3]	'	'
Unpaid principal balance	7,364		'	7,364		'	31,879
ALLL for loans and leases individually evaluated for impairment	435		'	435		'	2,469
Financing Receivable, Individually Evaluated for Impairment	2,290		'	2,290		'	17,075
Average balance	5,553		24,046	7,793		24,595	'
Interest income recognized	29		239	242		756	'
Originated Loans | Commercial | Mortgage	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	27,421	[3]	'	'
Unpaid principal balance	120,254		'	120,254		'	123,964
ALLL for loans and leases individually evaluated for impairment	8,506		'	8,506		'	11,697
Financing Receivable, Individually Evaluated for Impairment	116,222		'	116,222		'	133,804
Average balance	117,584		100,751	107,929		90,544	'
Interest income recognized	1,575		1,332	4,413		3,621	'
Originated Loans | Commercial | Other commercial real estate	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	-815	[3]	'	'
Unpaid principal balance	3,131		'	3,131		'	3,348
ALLL for loans and leases individually evaluated for impairment	133		'	133		'	298
Financing Receivable, Individually Evaluated for Impairment	2,835		'	2,835		'	3,375
Average balance	2,852		2,191	2,893		2,502	'
Interest income recognized	39		33	121		83	'
Originated Loans | Commercial | Commercial and industrial	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	7,551	[3]	'	'
Unpaid principal balance	11,512		'	11,512		'	9,583
ALLL for loans and leases individually evaluated for impairment	2,500		'	2,500		'	2,133
Financing Receivable, Individually Evaluated for Impairment	11,282		'	11,282		'	22,619
Average balance	12,136		13,414	13,811		11,847	'
Interest income recognized	127		186	533		682	'
Originated Loans | Commercial | Lease financing	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	-253	[3]	'	'
Unpaid principal balance	309		'	309		'	746
ALLL for loans and leases individually evaluated for impairment	177		'	177		'	202
Financing Receivable, Individually Evaluated for Impairment	309		'	309		'	804
Average balance	312		689	399		412	'
Interest income recognized	5		11	19		22	'
Originated Loans | Commercial | Other	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	-1,288	[3]	'	'
Unpaid principal balance	0		'	0		'	707
ALLL for loans and leases individually evaluated for impairment	0		'	0		'	53
Financing Receivable, Individually Evaluated for Impairment	0		'	0		'	707
Average balance	0		734	0		327	'
Interest income recognized	0		0	0		0	'
Originated Loans | Noncommerical | Mortgage	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	5,717	[3]	'	'
Unpaid principal balance	14,534		'	14,534		'	13,978
ALLL for loans and leases individually evaluated for impairment	1,113		'	1,113		'	959
Financing Receivable, Individually Evaluated for Impairment	14,333		'	14,333		'	15,836
Average balance	15,137		16,111	15,441		15,278	'
Interest income recognized	181		206	253		536	'
Originated Loans | Noncommerical | Construction and land development	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	-478	[3]	'	'
Unpaid principal balance	938		'	938		'	1,321
ALLL for loans and leases individually evaluated for impairment	52		'	52		'	287
Financing Receivable, Individually Evaluated for Impairment	938		'	938		'	1,321
Average balance	943		3,012	907		3,017	'
Interest income recognized	14		33	39		122	'
Originated Loans | Noncommerical | Revolving mortgage	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	-9,838	[3]	'	'
Unpaid principal balance	6,495		'	6,495		'	4,203
ALLL for loans and leases individually evaluated for impairment	1,167		'	1,167		'	1
Financing Receivable, Individually Evaluated for Impairment	6,495		'	6,495		'	4,203
Average balance	6,564		3,592	6,337		2,507	'
Interest income recognized	47		20	459		40	'
Originated Loans | Noncommerical | Consumer	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	-10,018	[3]	'	'
Unpaid principal balance	1,212		'	1,212		'	2,509
ALLL for loans and leases individually evaluated for impairment	133		'	133		'	256
Financing Receivable, Individually Evaluated for Impairment	1,212		'	1,212		'	2,509
Average balance	1,253		1,978	1,508		1,631	'
Interest income recognized	4		7	33		23	'
Originated Loans | Noncommerical | Non-specific	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Reclassification	0	[3]	'	-15,772	[3]	'	'
Unpaid principal balance	0		'	0		'	0
ALLL for loans and leases individually evaluated for impairment	0		'	0		'	0
Financing Receivable, Individually Evaluated for Impairment	0		'	0		'	0
Originated Loans | With A Recorded Allowance	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Total impaired noncovered loans and leases	104,427		'	104,427		'	97,785
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	1,941		'	1,941		'	6,960
Originated Loans | With A Recorded Allowance | Commercial | Mortgage	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	71,829		'	71,829		'	61,644
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	1,210		'	1,210		'	1,552
Originated Loans | With A Recorded Allowance | Commercial | Commercial and industrial	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	10,911		'	10,911		'	11,248
Originated Loans | With A Recorded Allowance | Commercial | Lease financing	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	309		'	309		'	723
Originated Loans | With A Recorded Allowance | Commercial | Other	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	0		'	0		'	53
Originated Loans | With A Recorded Allowance | Noncommerical | Mortgage	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	11,652		'	11,652		'	11,596
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	475		'	475		'	1,162
Originated Loans | With A Recorded Allowance | Noncommerical | Revolving mortgage	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	4,888		'	4,888		'	1,238
Originated Loans | With A Recorded Allowance | Noncommerical | Consumer	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	1,212		'	1,212		'	1,609
Originated Loans | With A Recorded Allowance | Noncommerical | Non-specific	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	0		'	0		'	0
Originated Loans | With No Recorded Allowance	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	51,489		'	51,489		'	104,468
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	349		'	349		'	10,115
Originated Loans | With No Recorded Allowance | Commercial | Mortgage	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	44,393		'	44,393		'	72,160
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	1,625		'	1,625		'	1,823
Originated Loans | With No Recorded Allowance | Commercial | Commercial and industrial	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	371		'	371		'	11,371
Originated Loans | With No Recorded Allowance | Commercial | Lease financing	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	0		'	0		'	81
Originated Loans | With No Recorded Allowance | Commercial | Other	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	0		'	0		'	654
Originated Loans | With No Recorded Allowance | Noncommerical | Mortgage	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	2,681		'	2,681		'	4,240
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	463		'	463		'	159
Originated Loans | With No Recorded Allowance | Noncommerical | Revolving mortgage	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	1,607		'	1,607		'	2,965
Originated Loans | With No Recorded Allowance | Noncommerical | Consumer	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	0		'	0		'	900
Originated Loans | With No Recorded Allowance | Noncommerical | Non-specific	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Allowance for loan and lease losses	0		'	0		'	0
Acquired Loans	'		'	'		'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'	'		'	'
Acquired loans which have adverse change in expected cash flows	$514,166		'	$514,166		'	'
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.
[3]	(1) Reclassification results from enhancements to the ALLL calculation during the second quarter of 2013 that resulted in the allocation of $15,772 previously designated as 'non-specific' to other loan classes and the absorption of $7,368 of the reserve for unfunded commitments related to unfunded, revocable loan commitments into the ALLL. Further discussion is contained in Note A.

Allowance_for_Loan_and_Lease_L4

Allowance for Loan and Lease Losses (Troubled Debt Restructuring) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
In Thousands, unless otherwise specified
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	$173,888	'	$253,388
Nonaccruing	35,857	'	79,782
Financing Receivable, Modifications, Recorded Investment	209,745	333,170	333,170
Minimum amount of nonaccrual status for loans to qualify to be individually evaluated for impairment	500,000	'	'
Originated Loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Nonaccruing	66,840	89,845	'
Financing Receivable, Modifications, Recorded Investment	95,514	139,963	'
Acquired Loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Financing Receivable, Modifications, Recorded Investment	114,231	193,207	'
Commercial	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	144,229	'	220,397
Nonaccruing	31,398	'	73,954
Financing Receivable, Modifications, Recorded Investment	175,627	'	294,351
Commercial | Construction and land development	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	24,394	'	47,368
Nonaccruing	2,505	'	26,920
Financing Receivable, Modifications, Recorded Investment	26,899	'	74,288
Commercial | Construction and land development | Originated Loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Nonaccruing	493	14,930	'
Commercial | Mortgage	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	105,775	'	151,728
Nonaccruing	26,669	'	37,603
Financing Receivable, Modifications, Recorded Investment	132,444	'	189,331
Commercial | Mortgage | Originated Loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Nonaccruing	44,818	50,532	'
Commercial | Other commercial real estate	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	3,548	'	10,137
Nonaccruing	1,330	'	2,194
Financing Receivable, Modifications, Recorded Investment	4,878	'	12,331
Commercial | Other commercial real estate | Originated Loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Nonaccruing	1,937	2,319	'
Commercial | Commercial and industrial	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	10,364	'	10,940
Nonaccruing	894	'	7,237
Financing Receivable, Modifications, Recorded Investment	11,258	'	18,177
Commercial | Commercial and industrial | Originated Loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Nonaccruing	2,978	6,972	'
Commercial | Lease financing	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	148	'	224
Nonaccruing	0	'	0
Financing Receivable, Modifications, Recorded Investment	148	'	224
Commercial | Lease financing | Originated Loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Nonaccruing	1,000	1,075	'
Noncommerical	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	29,659	'	32,991
Nonaccruing	4,459	'	5,828
Financing Receivable, Modifications, Recorded Investment	34,118	'	38,819
Noncommerical | Mortgage	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	24,913	'	28,777
Nonaccruing	3,996	'	5,828
Financing Receivable, Modifications, Recorded Investment	28,909	'	34,605
Noncommerical | Mortgage | Originated Loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Nonaccruing	15,119	12,603	'
Noncommerical | Construction and land development	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	476	'	1,657
Nonaccruing	463	'	0
Financing Receivable, Modifications, Recorded Investment	939	'	1,657
Noncommerical | Construction and land development | Originated Loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Nonaccruing	463	668	'
Noncommerical | Revolving mortgage	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	3,058	'	48
Nonaccruing	0	'	0
Financing Receivable, Modifications, Recorded Investment	3,058	'	48
Noncommerical | Revolving mortgage | Originated Loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Nonaccruing	0	0	'
Noncommerical | Consumer and Other	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Accruing	1,212	'	2,509
Nonaccruing	0	'	0
Financing Receivable, Modifications, Recorded Investment	$1,212	'	$2,509

Allowance_for_Loan_and_Lease_L5

Allowance for Loan and Lease Losses (Note Restructurings During Period) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	loans	loans	loans	loans
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	$209,745	$333,170	$209,745	$333,170	$333,170
Commercial	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	175,627	294,351	175,627	294,351	'
Commercial | Construction and land development	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	26,899	74,288	26,899	74,288	'
Commercial | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	132,444	189,331	132,444	189,331	'
Commercial | Other commercial real estate	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	4,878	12,331	4,878	12,331	'
Commercial | Commercial and industrial	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	11,258	18,177	11,258	18,177	'
Commercial | Lease financing	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	148	224	148	224	'
Noncommerical	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	34,118	38,819	34,118	38,819	'
Noncommerical | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	28,909	34,605	28,909	34,605	'
Noncommerical | Construction and land development	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	939	1,657	939	1,657	'
Noncommerical | Revolving mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	3,058	48	3,058	48	'
Originated Loans	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	95,514	'	95,514	'	139,963
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	15	4	17	21	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	6,765	1,220	7,556	5,710	'
Financing Receivable, Modifications, Number of Contracts	23	25	138	122	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	4,619	7,268	27,427	45,049	'
Originated Loans | Interest Only Loan	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	3	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	1,290	'
Financing Receivable, Modifications, Number of Contracts	1	5	13	17	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	203	1,589	4,373	5,796	'
Originated Loans | Loan Term Extension	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	4	4	6	14	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,303	1,220	2,094	3,586	'
Financing Receivable, Modifications, Number of Contracts	8	15	25	77	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,983	4,173	6,501	30,115	'
Originated Loans | Below Market Interest Rate	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	7	0	7	4	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	5,371	0	5,371	834	'
Financing Receivable, Modifications, Number of Contracts	11	5	65	25	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,308	1,506	13,903	7,829	'
Originated Loans | Discharge of Debt	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	4	0	4	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	91	0	91	0	'
Financing Receivable, Modifications, Number of Contracts	3	0	35	0	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	125	0	2,650	0	'
Originated Loans | Commercial | Interest Only Loan | Construction and land development	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	0	2	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	0	316	'
Originated Loans | Commercial | Interest Only Loan | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	2	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	952	'
Financing Receivable, Modifications, Number of Contracts	0	3	9	12	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	1,009	3,242	4,562	'
Originated Loans | Commercial | Interest Only Loan | Other commercial real estate	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	1	0	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	98	0	'
Originated Loans | Commercial | Interest Only Loan | Commercial and industrial	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0	'
Financing Receivable, Modifications, Number of Contracts	1	2	2	2	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	203	580	403	580	'
Originated Loans | Commercial | Loan Term Extension | Construction and land development	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	0	2	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	0	7,606	'
Originated Loans | Commercial | Loan Term Extension | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	4	4	5	10	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,303	1,220	1,524	3,389	'
Financing Receivable, Modifications, Number of Contracts	5	10	12	45	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,372	3,505	4,935	16,314	'
Originated Loans | Commercial | Loan Term Extension | Other commercial real estate	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	0	3	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	0	1,334	'
Originated Loans | Commercial | Loan Term Extension | Commercial and industrial	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	3	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	150	'
Financing Receivable, Modifications, Number of Contracts	0	2	2	10	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	513	623	1,371	'
Originated Loans | Commercial | Loan Term Extension | Lease financing	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	0	3	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	0	172	'
Originated Loans | Commercial | Below Market Interest Rate | Construction and land development	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0	'
Financing Receivable, Modifications, Number of Contracts	1	0	2	1	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	45	0	265	228	'
Originated Loans | Commercial | Below Market Interest Rate | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	5	0	5	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	5,125	0	5,125	0	'
Financing Receivable, Modifications, Number of Contracts	4	3	29	7	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	859	1,385	10,248	5,462	'
Originated Loans | Commercial | Below Market Interest Rate | Other commercial real estate	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	3	0	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	738	0	'
Originated Loans | Commercial | Below Market Interest Rate | Commercial and industrial	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	0	1	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	173	0	173	0	'
Financing Receivable, Modifications, Number of Contracts	0	1	4	4	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	113	829	226	'
Originated Loans | Commercial | Other Concession | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	0	2	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	0	924	'
Originated Loans | Noncommerical | Interest Only Loan | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	1	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	338	'
Financing Receivable, Modifications, Number of Contracts	'	'	1	1	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	630	338	'
Originated Loans | Noncommerical | Loan Term Extension | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	1	1	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	570	47	'
Financing Receivable, Modifications, Number of Contracts	2	2	9	7	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	590	133	879	493	'
Originated Loans | Noncommerical | Loan Term Extension | Construction and land development	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	0	1	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	0	1,701	'
Originated Loans | Noncommerical | Loan Term Extension | Consumer	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0	'
Financing Receivable, Modifications, Number of Contracts	1	1	2	6	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	21	22	64	1,124	'
Originated Loans | Noncommerical | Below Market Interest Rate | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	3	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	785	'
Financing Receivable, Modifications, Number of Contracts	1	1	14	10	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	319	8	826	1,853	'
Originated Loans | Noncommerical | Below Market Interest Rate | Construction and land development	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0	'
Financing Receivable, Modifications, Number of Contracts	2	0	4	0	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	42	0	555	0	'
Originated Loans | Noncommerical | Below Market Interest Rate | Revolving mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	0	1	1	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	73	0	73	49	'
Financing Receivable, Modifications, Number of Contracts	3	0	6	1	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	43	0	215	49	'
Originated Loans | Noncommerical | Below Market Interest Rate | Consumer	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	3	2	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	227	11	'
Originated Loans | Noncommerical | Discharge of Debt | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	0	2	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	44	0	44	0	'
Financing Receivable, Modifications, Number of Contracts	0	0	4	0	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	130	0	'
Originated Loans | Noncommerical | Discharge of Debt | Revolving mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	0	2	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	47	0	47	0	'
Financing Receivable, Modifications, Number of Contracts	3	0	31	0	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	125	0	2,520	0	'
Originated Loans | Noncommerical | Other Concession	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	0	3	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	0	1,309	'
Originated Loans | Noncommerical | Other Concession | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	0	1	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	0	385	'
Acquired Loans	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Recorded Investment	114,231	'	114,231	'	193,207
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	10	8	14	21	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	6,025	6,127	8,718	11,483	'
Financing Receivable, Modifications, Number of Contracts	3	26	42	74	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	569	13,886	26,104	44,565	'
Acquired Loans | Interest Only Loan	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	2	3	2	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	2,628	495	4,618	495	'
Financing Receivable, Modifications, Number of Contracts	0	4	6	8	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	4,158	3,892	13,049	'
Acquired Loans | Loan Term Extension	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	1	1	2	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	198	4,606	198	7,240	'
Financing Receivable, Modifications, Number of Contracts	2	4	9	17	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	278	5,196	3,914	12,134	'
Acquired Loans | Below Market Interest Rate	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	8	5	10	17	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	3,199	1,026	3,902	3,748	'
Financing Receivable, Modifications, Number of Contracts	1	18	27	49	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	291	4,532	18,298	19,382	'
Acquired Loans | Commercial | Interest Only Loan | Construction and land development	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	1	1	1	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	2,628	336	2,628	336	'
Financing Receivable, Modifications, Number of Contracts	0	1	1	2	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	336	2,628	474	'
Acquired Loans | Commercial | Interest Only Loan | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1	2	1	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	159	1,990	159	'
Financing Receivable, Modifications, Number of Contracts	0	3	2	4	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	3,822	1,060	12,317	'
Acquired Loans | Commercial | Interest Only Loan | Commercial and industrial	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	1	1	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	23	158	'
Acquired Loans | Commercial | Loan Term Extension | Construction and land development	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	1	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	2,634	'
Financing Receivable, Modifications, Number of Contracts	'	'	5	9	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	2,517	5,449	'
Acquired Loans | Commercial | Loan Term Extension | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0	'
Financing Receivable, Modifications, Number of Contracts	1	0	1	2	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	157	0	157	1,413	'
Acquired Loans | Commercial | Loan Term Extension | Commercial and industrial	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0	'
Financing Receivable, Modifications, Number of Contracts	1	1	2	2	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	121	118	1,042	147	'
Acquired Loans | Commercial | Below Market Interest Rate | Construction and land development	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	0	2	2	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,067	0	1,067	929	'
Financing Receivable, Modifications, Number of Contracts	0	2	5	10	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	52	3,489	1,464	'
Acquired Loans | Commercial | Below Market Interest Rate | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	1	2	5	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,290	1,015	1,290	2,747	'
Financing Receivable, Modifications, Number of Contracts	1	5	9	14	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	291	3,173	11,428	13,493	'
Acquired Loans | Commercial | Below Market Interest Rate | Other commercial real estate	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	0	2	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	0	1,766	'
Acquired Loans | Commercial | Below Market Interest Rate | Commercial and industrial	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	2	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	0	0	'
Financing Receivable, Modifications, Number of Contracts	0	1	3	4	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	1,137	510	1,137	'
Acquired Loans | Noncommerical | Interest Only Loan | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	2	1	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	181	100	'
Acquired Loans | Noncommerical | Loan Term Extension | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	1	1	1	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	198	4,606	198	4,606	'
Financing Receivable, Modifications, Number of Contracts	0	3	1	4	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	5,078	198	5,125	'
Acquired Loans | Noncommerical | Below Market Interest Rate | Mortgage	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	4	4	6	7	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	842	11	1,545	72	'
Financing Receivable, Modifications, Number of Contracts	0	10	10	18	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	170	2,871	1,522	'
Acquired Loans | Noncommerical | Below Market Interest Rate | Construction and land development	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	'	0	1	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	'	0	0	'
Financing Receivable, Modifications, Number of Contracts	'	'	0	1	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	'	$0	$0	'

Other_Real_Estate_Owned_Detail

Other Real Estate Owned (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012
Covered	'		'
Beginning balance	$102,577	[1]	$148,599
Additions	50,365		89,811
Sales	-78,597		-100,620
Writedowns	-15,576		-21,385
Ending balance	58,769	[2]	116,405	[2]
Noncovered	'		'
Beginning balance	43,513	[1]	50,399
Additions	28,756		27,552
Sales	-29,266		-24,960
Writedowns	-2,665		-7,928
Ending balance	40,338	[2]	45,063	[2]
Total	'		'
Beginning balance	146,090		198,998
Additions	79,121		117,363
Sales	-107,863		-125,580
Writedowns	-18,241		-29,313
Ending balance	$99,107		$161,468
[1]	Derived from 2012 Annual Report on Form 10-K.
[2]	Unaudited

Receivable_from_FDIC_for_Loss_2

Receivable from FDIC for Loss Share Agreements (Changes in Receivable from FDIC) (Details) (USD $)	3 Months Ended			9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Jun. 30, 2013	Dec. 31, 2012		Jun. 30, 2012	Dec. 31, 2011
Receivable From FDIC For Loss Share Agreements [Abstract]	'		'	'		'	'	'		'	'
FDIC Indemnification Asset	$100,553	[1]	$329,619	$100,553	[1]	$329,619	$158,013	$270,192	[1]	$405,626	$617,377
Receivable From FDIC For Loss Share Agreements [Roll Forward]	'		'	'		'	'	'		'	'
Accretion of discounts and premiums, net	-20,553		-32,398	-65,734		-79,135	'	'		'	'
Receipt of payments from FDIC	1,431		-31,765	-45,103		-223,863	'	'		'	'
Post-acquisition and other adjustments, net	($38,338)		($11,844)	($58,802)		$15,240	'	'		'	'
[1]	Unaudited

Estimated_Fair_Values_Estimate

Estimated Fair Values (Estimated Fair Values For Certain Financial Assets And Financial Liabilities) (Details) (USD $)	Sep. 30, 2013		Jun. 30, 2013	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'	'	'
Cash and due from banks	$569,118	[1]	'	$639,730	[2]	'	'	'
Overnight investments	1,354,131	[1]	'	443,180	[2]	'	'	'
Investment securities available for sale	5,161,585	[1]	'	5,226,228	[2]	'	'	'
Investment securities held to maturity	1,013	[1]	'	1,342	[2]	'	'	'
Loans held for sale	43,054	[1]	'	86,333	[2]	'	'	'
FDIC Indemnification Asset	100,553	[1]	158,013	270,192	[1]	329,619	405,626	617,377
Income earned not collected	46,110	[1]	'	47,666	[2]	'	'	'
Stock issued by:	'		'	'		'	'	'
Deposits	18,063,319	[1]	'	18,086,025	[2]	'	'	'
Payable to FDIC for loss share agreements	107,419		'	101,641		'	'	'
Carrying Value	'		'	'		'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'	'	'
Cash and due from banks	569,118		'	639,730		'	'	'
Overnight investments	1,354,131		'	443,180		'	'	'
Investment securities available for sale	5,161,585		'	5,226,228		'	'	'
Investment securities held to maturity	1,013		'	1,342		'	'	'
Loans held for sale	43,054		'	86,333		'	'	'
Loans covered by loss share agreements, net of allowance for loan and lease losses	1,128,764		'	1,669,263		'	'	'
Loans and leases not covered by loss share agreements, net of allowance for loan and lease losses	11,706,303		'	11,397,069		'	'	'
FDIC Indemnification Asset	100,553	[3]	'	270,192	[3]	'	'	'
Income earned not collected	46,110		'	47,666		'	'	'
Stock issued by:	'		'	'		'	'	'
Preferred stock	31,749		'	40,768		'	'	'
Deposits	18,063,319		'	18,086,025		'	'	'
Short-term borrowings	604,435		'	568,505		'	'	'
Long-term obligations	510,963		'	444,921		'	'	'
Payable to FDIC for loss share agreements	107,419		'	101,641		'	'	'
Accrued interest payable	6,051		'	9,353		'	'	'
Derivative Liability, Fair Value, Gross Liability	7,909		'	10,398		'	'	'
Carrying Value | Investment In Federal Home Loan Bank Of Atlanta Stock	'		'	'		'	'	'
Stock issued by:	'		'	'		'	'	'
Stock issued by Federal Home Loan Bank	31,938		'	36,139		'	'	'
Carrying Value | Investment In Federal Home Loan Bank Of San Francisco Stock	'		'	'		'	'	'
Stock issued by:	'		'	'		'	'	'
Stock issued by Federal Home Loan Bank	7,024		'	10,107		'	'	'
Carrying Value | Investment In Federal Home Loan Bank Of Seattle Stock	'		'	'		'	'	'
Stock issued by:	'		'	'		'	'	'
Stock issued by Federal Home Loan Bank	4,290		'	4,410		'	'	'
Fair Value	'		'	'		'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'	'	'
Cash and due from banks	569,118		'	639,730		'	'	'
Overnight investments	1,354,131		'	443,180		'	'	'
Investment securities available for sale	5,161,585		'	5,226,228		'	'	'
Investment securities held to maturity	1,080		'	1,448		'	'	'
Loans held for sale	44,819		'	87,654		'	'	'
Loans covered by loss share agreements, net of allowance for loan and lease losses	1,106,189		'	1,635,878		'	'	'
Loans and leases not covered by loss share agreements, net of allowance for loan and lease losses	11,480,252		'	11,238,597		'	'	'
FDIC Indemnification Asset	28,450	[3]	'	100,161	[3]	'	'	'
Income earned not collected	46,110		'	47,666		'	'	'
Stock issued by:	'		'	'		'	'	'
Preferred stock	32,996		'	40,793		'	'	'
Deposits	18,089,336		'	18,126,893		'	'	'
Short-term borrowings	604,435		'	568,505		'	'	'
Long-term obligations	530,080		'	472,642		'	'	'
Payable to FDIC for loss share agreements	123,321		'	125,065		'	'	'
Accrued interest payable	6,051		'	9,353		'	'	'
Derivative Liability, Fair Value, Gross Liability	7,909		'	10,398		'	'	'
Fair Value | Investment In Federal Home Loan Bank Of Atlanta Stock	'		'	'		'	'	'
Stock issued by:	'		'	'		'	'	'
Stock issued by Federal Home Loan Bank	31,938		'	36,139		'	'	'
Fair Value | Investment In Federal Home Loan Bank Of San Francisco Stock	'		'	'		'	'	'
Stock issued by:	'		'	'		'	'	'
Stock issued by Federal Home Loan Bank	7,024		'	10,107		'	'	'
Fair Value | Investment In Federal Home Loan Bank Of Seattle Stock	'		'	'		'	'	'
Stock issued by:	'		'	'		'	'	'
Stock issued by Federal Home Loan Bank	$4,290		'	$4,410		'	'	'
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.
[3]	The fair value of the FDIC receivable excludes receivable related to accretable yield to be amortized in prospective periods.

Estimated_Fair_Values_Narrativ

Estimated Fair Values (Narrative) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
In Thousands, unless otherwise specified
Estimated Fair Values [Line Items]	'		'		'
Total investment securities available for sale, fair value	$5,161,585	[1]	$5,226,228	[2]	'
Liability transfers between Level 1 and Level 2	0		'		0
Asset transfers between Level 1 and Level 2	0		'		0
Liability transfers between Level 2 and Level 1	0		'		0
Asset transfers between Level 2 and Level 1	0		'		0
Fair value of investment securities with nonobservable inputs	0		0		'
Fair Value, Measurements, Recurring	'		'		'
Estimated Fair Values [Line Items]	'		'		'
Liability measured at fair value on nonrecurring basis	0		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		0
Fair Value, Measurements, Recurring | Fair Value	'		'		'
Estimated Fair Values [Line Items]	'		'		'
Total investment securities available for sale, fair value	$5,161,585		$5,226,228		'
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%		'		'
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.

Estimated_Fair_Values_Assets_A

Estimated Fair Values (Assets And Liabilities Carried At Fair Value On A Recurring Basis) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Investment securities available for sale	$5,161,585	[1]	$5,226,228	[2]	'
Fair Value, Measurements, Recurring | Fair Value	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Investment securities available for sale	5,161,585		5,226,228		'
Interest rate swaps accounted for as cash flow hedges	7,909		10,398		'
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	5,161,585		5,226,228		'
Interest rate swaps accounted for as cash flow hedges	7,909		10,398		'
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		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	448,532		823,632		'
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	448,532		823,632		'
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	2,584,780		3,055,204		'
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	2,584,780		3,055,204		'
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	2,106,032		1,329,657		'
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	2,106,032		1,329,657		'
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		820		'
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		820		'
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	21,224		16,365		'
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	21,224		16,365		'
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	187		550		'
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	187		550		'
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		'
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.

Estimated_Fair_Values_Assets_A1

Estimated Fair Values (Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012		Dec. 31, 2011
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	$40,338	[1]	$43,513	[2]	$45,063	[1]	$50,399
Fair Value, Measurements, Nonrecurring | Fair Value	'		'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'		'
Loans held for sale	23,728		65,244		'		'
Impaired loans not covered by loss share agreements	90,211		51,644		'		'
Not covered under loss share agreements in other real estate owned	4,596		21,113		'		'
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		'		'
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	23,728		65,244		'		'
Impaired loans not covered by loss share agreements	0		0		'		'
Not 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	90,211		51,644		'		'
Not covered under loss share agreements in other real estate owned	$4,596		$21,113		'		'
[1]	Unaudited
[2]	Derived from 2012 Annual Report on Form 10-K.

Employee_Benefit_Plans_Compone

Employee Benefit Plans (Components Of Pension Expense) (Details) (Defined Benefit Pension, USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Pension	'	'	'	'
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'	'	'	'
Service cost	$3,765	$4,012	$12,248	$10,387
Interest cost	5,460	7,151	17,764	17,293
Expected return on assets	-6,393	-8,576	-20,798	-20,710
Amortization of prior service cost	53	53	158	158
Amortization of net actuarial loss	4,245	2,735	12,738	8,210
Total pension expense	$7,130	$5,375	$22,110	$15,338

Employee_Benefit_Plans_Narrati

Employee Benefit Plans (Narrative) (Details) (Defined Benefit Pension)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Defined Benefit Pension	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Assumed discount rate (percent)	4.00%	4.75%
Expected long-term rate of return on plan assets (percent)	7.25%	7.50%
Assumed rate of salary increases (percent)	4.00%	4.00%

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income Tax Disclosure [Abstract]	'	'	'	'	'
Income tax expense	$25,659	$19,974	$82,012	$49,009	'
Effective tax rates (percent)	38.50%	33.60%	36.90%	30.30%	'
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	'	'	'	'	$6,449

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	1 Months Ended							9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2011	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012
	Directors			Commitments to Extend Credit	Commitments to Extend Credit	Standby Letters of Credit	Standby Letters of Credit	Recourse Obligation on Mortgage Loans Sold	Recourse Obligation on Mortgage Loans Sold	Obligation to Repurchase Receivables Sold	Obligation to Repurchase Receivables Sold
Guarantor Obligations [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Unused commitments	'	'	'	$5,788,492	$5,467,998	'	'	'	'	'	'
Guarantor obligations amount	'	'	'	'	'	56,941	63,085	200,379	205,888	'	'
Reserve for estimated losses arising from repurchase of loans	'	'	'	'	'	'	'	'	'	3,641	4,065
Recourse Period, Maximum1	'	'	'	'	'	'	'	'120 days	'	'	'
Number of directors in complaint	5	'	'	'	'	'	'	'	'	'	'
Payable to FDIC for loss share agreements	'	$107,419	$101,641	'	'	'	'	'	'	'	'

Derivatives_Narrative_Details

Derivatives (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Derivative [Line Items]	'	'	'	'
Fair value of collateral pledged to secure interest rate contracts	$9,651	'	$9,651	'
Incremental interest expense paid to interest rate swap counterparties	831	769	2,463	2,294
2011 Interest Rate Swap	'	'	'	'
Derivative [Line Items]	'	'	'	'
Notional amount of interest rate derivatives	$93,500	'	$93,500	'
Fixed rate payments, interest rate	5.50%	'	5.50%	'
Variable rate payment rate	1.75%	'	1.75%	'
2006 Interest Rate Swap	'	'	'	'
Derivative [Line Items]	'	'	'	'
Variable rate payment rate	1.75%	'	1.75%	'
2009 Interest Rate Swap	'	'	'	'
Derivative [Line Items]	'	'	'	'
Variable rate payment rate	1.75%	'	1.75%	'

Derivatives_Schedule_Of_Intere

Derivatives (Schedule Of Interest Rate Swaps) (Details) (2011 Interest Rate Swap, USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
2011 Interest Rate Swap	'	'
Derivative [Line Items]	'	'
Estimated fair value of liability	$7,909	$10,398
Derivative, Notional Amount	$93,500	$93,500

Derivatives_Activity_In_Accumu

Derivatives (Activity In Accumulated Other Comprehensive Income (Loss) Related To Interest Rate Swaps) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2013
In Thousands, unless otherwise specified			Interest Rate Swap	Interest Rate Swap	Interest Rate Swap	Interest Rate Swap	Interest Rate Swap
Derivatives, Fair Value [Line Items]	'	'	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss), before Tax	($156,536)	($134,923)	($7,909)	($11,170)	($10,398)	($10,714)	'
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	'	'	'	'	'	'	1,927
Accumulated Other Comprehensive Income (Loss) from Interest Rate Swaps [Roll Forward]	'	'	'	'	'	'	'
Other comprehensive income (loss) recognized during the period	'	'	$2,489	($456)	'	'	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Income) (Details) (USD $)

3 Months Ended

9 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Jun. 30, 2013

Dec. 31, 2012

Jun. 30, 2012

Dec. 31, 2011

Accumulated Other Comprehensive Income (Loss), before Tax

($156,536)

'

($156,536)

'

'

($134,923)

'

'

Long-term obligations

179,183

215,356

563,593

651,740

'

'

'

'

Deferred tax expense (benefit)

-60,991

'

-60,991

'

'

-52,817

'

'

Accumulated other comprehensive income (loss), net of tax

-95,545

[1]

-51,986

-95,545

[1]

-51,986

-100,176

-82,106

[2]

-62,407

-66,574

Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax

-2,668

[3]

-2,142

[3]

-8,887

[3]

-6,458

[3]

'

'

'

'

Securities gains (losses)

0

31

0

-11

'

'

'

'

Reclassification adjustment for losses included in income before income taxes

4,298

2,788

12,896

8,368

'

'

'

'

Unrealized Gains on Investment Securities Available for Sale

'

'

'

'

'

'

'

'

Accumulated Other Comprehensive Income (Loss), before Tax

-3,189

'

-3,189

'

'

33,809

'

'

Deferred tax expense (benefit)

-1,365

'

-1,365

'

'

13,292

'

'

Accumulated other comprehensive income (loss), net of tax

-1,824

[4]

25,888

[4]

-1,824

[4]

25,888

[4]

-4,117

[4]

20,517

[4]

17,073

[4]

16,115

[4]

Income taxes

0

[3]

-12

[3]

0

[3]

-13

[3]

'

'

'

'

Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax

0

[3],[4]

19

[3],[4]

0

[3],[4]

21

[3],[4]

'

'

'

'

Securities gains (losses)

0

[3]

31

[3]

0

[3]

34

[3]

'

'

'

'

Funded Status of Defined Benefit Plan

'

'

'

'

'

'

'

'

Accumulated Other Comprehensive Income (Loss), before Tax

-145,438

'

-145,438

'

'

-158,334

'

'

Deferred tax expense (benefit)

-56,575

'

-56,575

'

'

-62,003

'

'

Accumulated other comprehensive income (loss), net of tax

-88,863

[4]

-71,114

[4]

-88,863

[4]

-71,114

[4]

-91,100

[4]

-96,331

[4]

-72,810

[4]

-76,205

[4]

Income taxes

2,061

[3]

1,092

[3]

5,428

[3]

3,277

[3]

'

'

'

'

Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax

-2,237

[3],[4]

-1,696

[3],[4]

-7,468

[3],[4]

-5,091

[3],[4]

'

'

'

'

Employee Benefits, prior service costs

-53

[3]

-53

[3]

-158

[3]

-158

[3]

'

'

'

'

Reclassification adjustment for losses included in income before income taxes

-4,245

[3]

-2,735

[3]

-12,738

[3]

-8,210

[3]

'

'

'

'

Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax

-4,298

-2,788

[3]

-12,896

-8,368

[3]

'

'

'

'

Unrealized Loss on Cash Flow Hedges

'

'

'

'

'

'

'

'

Accumulated Other Comprehensive Income (Loss), before Tax

-7,909

'

-7,909

'

'

-10,398

'

'

Long-term obligations

-831

[3]

-769

[3]

-2,463

[3]

-2,294

[3]

'

'

'

'

Deferred tax expense (benefit)

-3,051

'

-3,051

'

'

-4,106

'

'

Accumulated other comprehensive income (loss), net of tax

-4,858

[4]

-6,760

[4]

-4,858

[4]

-6,760

[4]

-4,959

[4]

-6,292

[4]

-6,670

[4]

-6,484

[4]

Income taxes

400

[3]

304

[3]

1,044

[3]

906

[3]

'

'

'

'

Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax

($431)

[3],[4]

($465)

[3],[4]

($1,419)

[3],[4]

($1,388)

[3],[4]

'

'

'

'

[1]

Unaudited

[2]

Derived from 2012 Annual Report on Form 10-K.

[3]

Amounts in parentheses indicate debits to profit/loss.Details about accumulated other comprehensive lossB Amount reclassified from accumulated other comprehensive loss1B Affected line item in the statement where net income is presented (dollars in thousands) Nine months ended September 30, 2013 Gains and losses on cash flow hedges Interest rate swap contractsB $(2,463)B Long-term obligations 1,044B Income taxes $(1,419)B Net incomeUnrealized gains and losses on available for sale securities $bB Securities gains (losses) bB Income taxes $bB Net incomeAmortization of defined benefit pension items Prior service costsB $(158)B Employee benefits Actuarial gainsB (12,738)B Employee benefits (12,896)B Income before income taxes 5,428B Income taxes $(7,468)B Net incomeTotal reclassifications for the periodB $(8,887) Nine months ended September 30, 2012 Gains and losses on cash flow hedges Interest rate swap contractsB $(2,294)B Long-term obligations 906B Income taxes $(1,388)B Net income Unrealized gains and losses on available for sale securities $34B Securities gains (losses) (13)B Income taxes $21B Net income Amortization of defined benefit pension items Prior service costsB $(158)B Employee benefits Actuarial gainsB (8,210)B Employee benefits (8,368)B Income before income taxes 3,277B Income taxes $(5,091)B Net incomeTotal reclassifications for the periodB $(6,458) 1 Amounts in parentheses indicate debits to profit/loss.

[4]

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				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'		'
Beginning balance	($100,176)		($62,407)		($82,106)	[1]	($66,574)
Other comprehensive income (loss) before reclassifications	1,963		8,279		-22,326		8,130
Amounts reclassified from accumulated other comprehensive income	2,668	[2]	2,142	[2]	8,887	[2]	6,458	[2]
Net current period other comprehensive income (loss)	4,631		10,421		-13,439		14,588
Ending balance	-95,545	[3]	-51,986		-95,545	[3]	-51,986
Unrealized Loss on Cash Flow Hedges	'		'		'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'		'
Beginning balance	-4,959	[4]	-6,670	[4]	-6,292	[4]	-6,484	[4]
Other comprehensive income (loss) before reclassifications	-330	[4]	-555	[4]	15	[4]	-1,664	[4]
Amounts reclassified from accumulated other comprehensive income	431	[2],[4]	465	[2],[4]	1,419	[2],[4]	1,388	[2],[4]
Net current period other comprehensive income (loss)	101	[4]	-90	[4]	1,434	[4]	-276	[4]
Ending balance	-4,858	[4]	-6,760	[4]	-4,858	[4]	-6,760	[4]
Unrealized Gains on Investment Securities Available for Sale	'		'		'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'		'
Beginning balance	-4,117	[4]	17,073	[4]	20,517	[4]	16,115	[4]
Other comprehensive income (loss) before reclassifications	2,293	[4]	8,834	[4]	-22,341	[4]	9,794	[4]
Amounts reclassified from accumulated other comprehensive income	0	[2],[4]	-19	[2],[4]	0	[2],[4]	-21	[2],[4]
Net current period other comprehensive income (loss)	2,293	[4]	8,815	[4]	-22,341	[4]	9,773	[4]
Ending balance	-1,824	[4]	25,888	[4]	-1,824	[4]	25,888	[4]
Defined Benefit Pension Items	'		'		'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'		'
Beginning balance	-91,100	[4]	-72,810	[4]	-96,331	[4]	-76,205	[4]
Other comprehensive income (loss) before reclassifications	0	[4]	0	[4]	0	[4]	0	[4]
Amounts reclassified from accumulated other comprehensive income	2,237	[2],[4]	1,696	[2],[4]	7,468	[2],[4]	5,091	[2],[4]
Net current period other comprehensive income (loss)	2,237	[4]	1,696	[4]	7,468	[4]	5,091	[4]
Ending balance	($88,863)	[4]	($71,114)	[4]	($88,863)	[4]	($71,114)	[4]
[1]	Derived from 2012 Annual Report on Form 10-K.
[2]	Amounts in parentheses indicate debits to profit/loss.Details about accumulated other comprehensive lossB Amount reclassified from accumulated other comprehensive loss1B Affected line item in the statement where net income is presented (dollars in thousands) Nine months ended September 30, 2013 Gains and losses on cash flow hedges Interest rate swap contractsB $(2,463)B Long-term obligations 1,044B Income taxes $(1,419)B Net incomeUnrealized gains and losses on available for sale securities $bB Securities gains (losses) bB Income taxes $bB Net incomeAmortization of defined benefit pension items Prior service costsB $(158)B Employee benefits Actuarial gainsB (12,738)B Employee benefits (12,896)B Income before income taxes 5,428B Income taxes $(7,468)B Net incomeTotal reclassifications for the periodB $(8,887) Nine months ended September 30, 2012 Gains and losses on cash flow hedges Interest rate swap contractsB $(2,294)B Long-term obligations 906B Income taxes $(1,388)B Net income Unrealized gains and losses on available for sale securities $34B Securities gains (losses) (13)B Income taxes $21B Net income Amortization of defined benefit pension items Prior service costsB $(158)B Employee benefits Actuarial gainsB (8,210)B Employee benefits (8,368)B Income before income taxes 3,277B Income taxes $(5,091)B Net incomeTotal reclassifications for the periodB $(6,458) 1 Amounts in parentheses indicate debits to profit/loss.
[3]	Unaudited
[4]	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				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Long-term obligations	$179,183		$215,356		$563,593		$651,740
Securities gains (losses)	0		31		0		-11
Reclassification adjustment for losses included in income before income taxes	4,298		2,788		12,896		8,368
Amounts reclassified from accumulated other comprehensive income, net of tax	2,668	[1]	2,142	[1]	8,887	[1]	6,458	[1]
Unrealized Loss on Cash Flow Hedges	'		'		'		'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Long-term obligations	-831	[1]	-769	[1]	-2,463	[1]	-2,294	[1]
Income taxes	400	[1]	304	[1]	1,044	[1]	906	[1]
Amounts reclassified from accumulated other comprehensive income, net of tax	431	[1],[2]	465	[1],[2]	1,419	[1],[2]	1,388	[1],[2]
Unrealized Gains on Investment Securities Available for Sale	'		'		'		'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Securities gains (losses)	0	[1]	31	[1]	0	[1]	34	[1]
Income taxes	0	[1]	-12	[1]	0	[1]	-13	[1]
Amounts reclassified from accumulated other comprehensive income, net of tax	0	[1],[2]	-19	[1],[2]	0	[1],[2]	-21	[1],[2]
Defined Benefit Pension Items	'		'		'		'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Employee Benefits, prior service costs	-53	[1]	-53	[1]	-158	[1]	-158	[1]
Reclassification adjustment for losses included in income before income taxes	-4,245	[1]	-2,735	[1]	-12,738	[1]	-8,210	[1]
Total before taxes	-4,298		-2,788	[1]	-12,896		-8,368	[1]
Income taxes	2,061	[1]	1,092	[1]	5,428	[1]	3,277	[1]
Amounts reclassified from accumulated other comprehensive income, net of tax	$2,237	[1],[2]	$1,696	[1],[2]	$7,468	[1],[2]	$5,091	[1],[2]
[1]	Amounts in parentheses indicate debits to profit/loss.Details about accumulated other comprehensive lossB Amount reclassified from accumulated other comprehensive loss1B Affected line item in the statement where net income is presented (dollars in thousands) Nine months ended September 30, 2013 Gains and losses on cash flow hedges Interest rate swap contractsB $(2,463)B Long-term obligations 1,044B Income taxes $(1,419)B Net incomeUnrealized gains and losses on available for sale securities $bB Securities gains (losses) bB Income taxes $bB Net incomeAmortization of defined benefit pension items Prior service costsB $(158)B Employee benefits Actuarial gainsB (12,738)B Employee benefits (12,896)B Income before income taxes 5,428B Income taxes $(7,468)B Net incomeTotal reclassifications for the periodB $(8,887) Nine months ended September 30, 2012 Gains and losses on cash flow hedges Interest rate swap contractsB $(2,294)B Long-term obligations 906B Income taxes $(1,388)B Net income Unrealized gains and losses on available for sale securities $34B Securities gains (losses) (13)B Income taxes $21B Net income Amortization of defined benefit pension items Prior service costsB $(158)B Employee benefits Actuarial gainsB (8,210)B Employee benefits (8,368)B Income before income taxes 3,277B Income taxes $(5,091)B Net incomeTotal reclassifications for the periodB $(6,458) 1 Amounts in parentheses indicate debits to profit/loss.
[2]	All amounts are net of tax. Amounts in parentheses indicate debits.