FirstMerit (FMER) 10-Q 4 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	9 Months Ended
	Sep. 30, 2014	Oct. 28, 2014
Entity Information [Line Items]	'	'
Entity Registrant Name	'FIRSTMERIT CORP /OH/	'
Entity Central Index Key	'0000354869	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	165,397,413

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
ASSETS	'	'	'
Cash and due from banks	$429,699	$571,171	$505,228
Interest-bearing deposits in banks	55,629	346,651	742,039
Total cash and cash equivalents	485,328	917,822	1,247,267
Investment securities:	'	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	3,002,262	2,935,688	2,749,934
Available-for-sale	3,462,990	3,273,174	3,256,259
Other investments	148,421	180,803	270,369
Loans Held-for-sale, Fair Value Disclosure	19,512	11,622	17,813
Loans	15,242,026	14,300,972	14,260,836
Allowance for loan losses	-140,077	-141,252	-143,835
Net loans	15,101,949	14,159,720	14,117,001
Premises and equipment, net	318,690	327,054	324,337
Goodwill	741,740	741,740	741,740
Intangible assets, net	73,953	82,755	85,447
Covered other real estate	51,434	65,234	70,791
Accrued interest receivable and other assets	1,201,928	1,216,416	1,256,772
Total assets	24,608,207	23,912,028	24,137,730
Deposits:	'	'	'
Noninterest-bearing	5,535,886	5,459,029	5,461,674
Interest-bearing	3,043,952	3,026,735	2,815,681
Savings and money market accounts	8,396,064	8,587,167	8,575,292
Certificates and other time deposits	2,391,009	2,460,670	2,636,886
Total deposits	19,366,911	19,533,601	19,489,533
Federal funds purchased and securities sold under agreements to repurchase	1,273,290	851,535	1,049,801
Wholesale borrowings	608,463	200,600	200,858
Long-term debt	249,933	324,428	324,425
Accrued taxes, expenses and other liabilities	289,179	298,970	418,468
Total liabilities	21,787,776	21,209,134	21,483,085
Shareholders' equity:	'	'	'
Preferred Stock, Value, Issued	100,000	100,000	100,000
Common Stock warrant	3,000	3,000	3,000
Common Stock, without par value; authorized 300,000,000 shares; issued: September 30, 2014 and December 31, 2013 - 170,183,540 shares; September 30, 2013 - 170,179,305 shares	127,937	127,937	127,937
Capital surplus	1,390,207	1,390,643	1,388,638
Accumulated other comprehensive loss	-49,583	-66,876	-83,613
Retained earnings	1,371,453	1,277,975	1,248,554
Treasury stock, at cost: September 30, 2014 - 4,799,239; December 31, 2013 - 5,127,332 shares; September 30, 2013 - 5,134,681 shares	-122,583	-129,785	-129,871
Total shareholders' equity	2,820,431	2,702,894	2,654,645
Total liabilities and shareholders' equity	$24,608,207	$23,912,028	$24,137,730

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets Parenthetical	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Statement of Financial Position [Abstract]	'	'	'
Common stock, shares authorized	300,000,000	300,000,000	300,000,000
Common stock, shares issued	170,183,540	170,183,540	115,121,731
Non-cumulative Perpetual Preferred Stock, Series A, Shares Authorized	115,000	115,000	115,000
5.875% Non-Cumulative Perpetual Preferred stock, Series A, 100,000 outstanding	100,000	100,000	100,000
Treasury stock, at cost	4,799,239	5,127,332	5,134,681

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest income:	'	'	'	'
Loans and loans held for sale	$170,648	$182,107	$513,678	$459,313
Investment securities:	'	'	'	'
Taxable	32,072	29,766	96,347	78,143
Tax-exempt	5,477	5,624	16,372	15,767
Total investment securities interest	37,549	35,390	112,719	93,910
Total interest income	208,197	217,497	626,397	553,223
Deposits:	'	'	'	'
Interest bearing	755	809	2,236	1,784
Savings and money market accounts	5,570	6,495	16,605	18,279
Certificates and other time deposits	2,846	1,712	8,319	7,149
Securities sold under agreements to repurchase	268	306	697	949
Wholesale borrowings	1,397	936	3,917	2,955
Long-term debt	3,783	3,899	11,566	9,390
Total interest expense	14,619	14,157	43,340	40,506
Net interest income	193,578	203,340	583,057	512,717
Provision for Loan and Lease Losses	9,192	6,379	38,982	23,634
Net interest income after provision for loan losses	184,386	196,961	544,075	489,083
Noninterest income:	'	'	'	'
Trust department income	10,300	9,608	30,118	24,515
Service charges on deposits	18,684	22,146	53,860	55,315
Credit card fees	13,754	13,588	39,361	38,128
ATM and other service fees	6,182	5,216	17,998	13,496
Bank owned life insurance income	4,218	4,351	11,840	12,889
Investment services and insurance	3,606	3,403	10,974	9,247
Investment securities gains/(losses), net	14	0	150	-2,803
Loan sales and servicing income	4,740	3,644	12,932	19,492
Other operating income	8,235	9,134	32,331	27,644
Total noninterest income	69,733	71,090	209,564	197,923
Noninterest expense:	'	'	'	'
Salaries, wages, pension and employee benefits	90,593	97,390	269,071	260,395
Net occupancy expense	13,887	13,816	45,248	35,444
Equipment expense	12,188	11,040	36,366	28,698
Stationery, supplies and postage	3,723	3,801	11,820	9,304
Bankcard, loan processing and other costs	11,151	40,786	33,795	61,043
Professional services	5,270	9,768	15,373	32,322
Amortization of intangibles	2,933	2,972	8,802	5,700
FDIC insurance expense	2,988	4,925	14,492	12,601
Other operating expense	20,412	26,101	64,911	60,126
Total noninterest expense	163,145	210,599	499,878	505,633
Income before income tax expense	90,974	57,452	253,761	181,373
Income tax expense	27,076	16,737	76,889	54,863
Net income	63,898	40,715	176,872	126,510
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	519	310	1,433	1,102
Preferred Stock Dividends, Income Statement Impact	1,469	1,469	4,407	3,868
Net income attributable to common shareholders	61,910	38,936	171,032	121,540
Net income used in diluted EPS calculation	$61,910	$38,936	$171,032	$121,540
Weighted average number of common shares outstanding - basic	165,389	165,044	165,263	144,402
Weighted average number of common shares outstanding - diluted	165,804	165,874	165,916	147,392
Basic earnings per common share	$0.37	$0.24	$1.03	$0.84
Diluted earnings per common share	$0.37	$0.23	$1.03	$0.82
Dividend per common share	$0.16	$0.16	$0.48	$0.48

Statement_of_Comprehensive_Inc

Statement of Comprehensive Income Statement of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'	'
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$90,974	$57,452	$253,761	$181,373	'
Income Tax Expense (Benefit)	27,076	16,737	76,889	54,863	'
Net income	63,898	40,715	176,872	126,510	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	-16,207	-17,491	24,293	-104,853	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	-5,672	-6,123	8,503	-36,699	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	-10,535	-11,368	15,790	-68,154	'
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax	-563	-534	-1,551	-1,654	'
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Tax	-197	-187	-543	-579	'
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Net of Tax	-366	-347	-1,008	-1,075	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	14	-1	150	2,802	'
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	5	0	53	981	'
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	-9	1	-97	-1,821	'
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax	-16,784	-18,026	22,592	-103,705	'
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	-5,874	-6,310	7,907	-36,297	'
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax	-10,910	-11,716	14,685	-67,408	'
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	0	0	0	0	'
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax	0	0	0	0	'
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0	0	0	0	'
Other Comprehensive Income Defined benefit plan, amortization of gains, before tax	768	0	2,398	0	'
Other comprehensive Income, Defined Benefit Plan, Amortization of Gains, tax	269	0	839	0	'
Other Comprehensive Income, Defined benefit plan, amortization of gains, after tax	499	0	1,559	0	'
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax	516	0	1,614	0	'
Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Tax	181	0	565	0	'
Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Net of Tax	335	0	1,049	0	'
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	1,284	0	4,012	0	'
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	450	0	1,404	0	20,233
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	834	0	2,608	0	'
Other Comprehensive Income (Loss), before Tax	-15,500	-18,026	26,604	-103,705	'
Other Comprehensive Income (Loss), Tax	-5,424	-6,310	9,311	-36,297	'
Other Comprehensive Income (Loss), Net of Tax	-10,076	-11,716	17,293	-67,408	'
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	75,474	39,426	280,365	77,668	'
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	21,652	10,427	86,200	18,566	'
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$53,822	$28,999	$194,165	$59,102	'

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholders' Equity (USD $)	Total	Preferred Stock	Common Stock	Warrant	Capital Surplus	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
In Thousands, unless otherwise specified
Beginning Balance at Dec. 31, 2012	$1,645,202	$0	$127,937	$0	$475,979	($16,205)	$1,195,850	($138,359)
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'
Net income	126,510	'	'	'	'	'	126,510	'
Other Comprehensive Income (Loss), Net of Tax	-67,408	'	'	'	'	-67,408	'	'
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	59,102	'	'	'	'	-67,408	126,510	'
Dividends, Preferred Stock, Cash	-3,868	'	'	'	'	'	-3,868	'
Cash dividends - common stock	-69,938	'	'	'	'	'	-69,938	'
Stock Issued During Period, Value, Acquisitions	925,272	'	'	'	925,272	'	'	'
Nonvested (restricted) shares granted	-6,814	'	'	'	-19,257	'	'	12,443
Restricted Stock Activity	-2,608	'	'	'	956	'	'	-3,564
Deferred compensation trust	0	'	'	'	391	'	'	-391
Share-based compensation	8,747	'	'	'	8,747	'	'	'
Issuance of preferred stock	96,550	100,000	'	'	-3,450	'	'	'
Adjustments to Additional Paid in Capital, Warrant Issued	3,000	'	'	3,000	'	'	'	'
Ending Balance at Sep. 30, 2013	2,654,645	100,000	127,937	3,000	1,388,638	-83,613	1,248,554	-129,871
Beginning Balance at Dec. 31, 2013	2,702,894	100,000	127,937	3,000	1,390,643	-66,876	1,277,975	-129,785
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'
Net income	176,872	0	0	0	0	0	176,872	0
Other Comprehensive Income (Loss), Net of Tax	17,293	'	'	'	'	17,293	'	'
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	194,165	0	0	0	0	17,293	176,872	0
Dividends, Preferred Stock, Cash	-4,407	0	0	0	0	0	-4,407	0
Cash dividends - common stock	-78,987	'	'	0	'	0	-78,987	0
Nonvested (restricted) shares granted	99	'	'	0	-13,029	0	0	13,128
Restricted Stock Activity	-4,290	'	'	0	952	0	0	-5,242
Deferred compensation trust	0	'	'	0	684	0	0	-684
Share-based compensation	10,957	'	'	0	10,957	0	0	0
Adjustments to Additional Paid in Capital, Warrant Issued	0	'	'	'	'	'	'	'
Ending Balance at Sep. 30, 2014	$2,820,431	$100,000	$127,937	$3,000	$1,390,207	($49,583)	$1,371,453	($122,583)

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Shareholders' Equity (parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Apr. 12, 2013	Apr. 12, 2013
			Citizens Republic Bancorp	FirstMerit
				Citizens Republic Bancorp
Common Stock, Dividends, Per Share, Cash Paid	$0.48	$0.48	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0	'	'
Stock Issued During Period, Shares, Restricted Stock Award, Gross	575,381	539,132	'	'
Treasury Stock, Shares, Acquired	247,288	200,898	'	'
Stock Issued During Period, Shares, Treasury Stock Reissued	219,315	174,597	'	'
FirstMerit shares of Common Stock issued for Citizens' shares	'	'	55,468,283	'
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	'	'	'	2,408,203

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Operating Activities	'	'
Net income	$176,872	$126,510
Adjustments to reconcile net income to net cash provided and used by operating activities:	'	'
Provision for loan losses	38,982	23,634
Increase (Decrease) in Provision for Deferred Income Taxes	28,039	-16,824
Depreciation, Depletion and Amortization	39,845	28,001
Benefit attributable to FDIC loss share	3,835	8,890
Accretion of acquired loans	-106,997	-94,916
Amortization and accretion of investment securities, net	'	'
Available for sale	7,114	15,141
Held to maturity	6,419	5,454
(Gains)/losses on sales and calls of available-for-sale investment securities, net	-150	2,803
Originations of loans held for sale	-264,856	-462,948
Proceeds from sales of loans, primarily mortgage loans sold in the secondary markets	262,341	479,623
Gains on sales of loans, net	-5,375	-10,805
Amortization of Intangible Assets	8,802	5,700
Share-based Compensation	10,957	8,747
Net decrease (increase) in other assets	-5,245	133,958
Net increase (decrease) in other liabilities	-12,147	23,330
NET CASH PROVIDED BY OPERATING ACTIVITIES	188,436	276,298
Proceeds from sale of investment securities	'	'
Available for sale	13,008	2,179,728
Proceeds from Sale of Other Investments	32,486	0
Held to maturity	5,012	897
Proceeds from prepayments, calls, and maturities of investment securities	'	'
Available for sale	360,600	579,023
Held to maturity	262,560	151,626
Purchases of investment securities	'	'
Available for sale	-545,201	-847,968
Held to maturity	-344,606	-1,559,733
Other	-142	-3,097
Net (increase)/decrease in loans and leases	-886,035	158,998
Purchases of premises and equipment	-45,618	-27,237
Sales of premises and equipment	26,114	181
Cash Acquired from Acquisition	0	189,009
NET CASH (USED) PROVIDED BY INVESTING ACTIVITIES	-1,121,822	821,427
Financing Activities	'	'
Net increase in demand accounts	94,074	626,602
Net (decrease)/increase in savings and money market accounts	-191,103	164,638
Net decrease in certificates and other time deposits	-69,661	-337,887
Net increase/(decrease) in securities sold under agreements to repurchase	421,755	-169,729
Net increase/(decrease) in long-term debt	-74,451	249,927
Net increase/(decrease) in wholesale borrowings	407,863	-655,345
Net proceeds from issuance of preferred stock	0	96,550
Cash dividends - common	-78,987	-69,938
Cash dividends - preferred	-4,407	-3,868
Restricted stock activity	-4,191	-9,422
NET CASH PROVIDED (USED) BY FINANCING ACTIVITIES	500,892	-108,472
(Decrease)/Increase in cash and cash equivalents	-432,494	989,253
Cash and cash equivalents at beginning of year	917,822	258,014
Cash and cash equivalents at end of year	485,328	1,247,267
Cash paid during period for:	'	'
Interest	46,349	42,931
Federal income taxes	12,573	27,662
Cash Flows, non-cash transaction-Stock issued during period	0	925,272
Adjustments to Additional Paid in Capital, Warrant Issued	$0	$3,000

Significant_Accounting_Policie

Significant Accounting Policies (Notes)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Significant Accounting Policies	'
	FirstMerit Corporation and subsidiaries is a diversified financial services company headquartered in Akron, Ohio with 381 banking offices in the Ohio, Michigan, Wisconsin, Illinois, and Pennsylvania areas. The Corporation provides a complete range of banking and other financial services to consumers and businesses through its core operations.
	Summary of Significant Accounting Policies
	Unless otherwise indicated, defined terms and abbreviations used herein have the meanings set forth in the accompanying Glossary of Acronyms and Abbreviations.
	Basis of Presentation - FirstMerit Corporation is a BHC whose principal asset is the Common Stock of its wholly-owned subsidiary, FirstMerit Bank, N. A. The Parent Company’s other subsidiaries include Citizens Savings Corporation of Stark County, FirstMerit Capital Trust I, and FirstMerit Risk Management, Inc. All significant intercompany balances and transactions have been eliminated in consolidation.
	The accounting and reporting policies of the Corporation conform to GAAP and to general practices within the financial services industry.
	The Consolidated Balance Sheet at December 31, 2013 has been derived from the audited consolidated financial statements at that date. The accompanying unaudited interim financial statements reflect all adjustments (consisting only of normally recurring adjustments) that are, in the opinion of Management, necessary for a fair statement of the results for the interim periods presented. Certain reclassifications of prior year’s amounts have been made to conform to the current year presentation. Such reclassifications had no effect on net earnings or equity. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been omitted in accordance with the rules of the SEC. The unaudited consolidated financial statements of the Corporation as of September 30, 2014 and 2013 are not necessarily indicative of the results that may be achieved for the full fiscal year or for any future period. These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2013 (the “2013 Form 10-K”). There have been no significant changes in the current quarter to the Corporation’s accounting policies as disclosed in the 2013 Form 10-K.
	In preparing these accompanying unaudited interim consolidated financial statements, subsequent events were evaluated through the time the consolidated financial statements were issued.
	Recently Adopted Accounting Standards
	FASB ASU 2014-01, Accounting for Investments in Qualified Affordable Housing Projects. The amendments in ASU 2014-01 do not change the existing accounting methods, but permit reporting entities to make an accounting policy election to account for their investments in qualified affordable projects using the proportional amortization method, if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The amendments in ASU 2014-01 are effective for annual periods and interim reporting periods within those annual periods, beginning after December 15, 2014, and should be applied retrospectively to all periods presented. The Corporation early adopted ASU 2014-01 in the first quarter of 2014. Amortization of the initial investment cost of qualifying projects is now recorded in the provision for income taxes together with the tax credits and benefits received. Previously, the amortization was recorded as other noninterest expense. All prior period amounts have been restated to reflect the adoption of the amendment, which resulted in an offsetting decrease to other noninterest expense and increase to the provision for income taxes of approximately $0.8 million and $2.3 million for the three and nine months ended September 30, 2013, respectively.
	Recently Issued Accounting Standards
	FASB ASU 2014-14, Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure—a consensus of the FASB Emerging Issues Task Force. The objective of this update is to reduce diversity in practice by addressing the classification of certain foreclosed mortgage loans held by creditors that are either fully or partially guaranteed under government programs. The amendments in this update require that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if the
	following conditions are met: 1) the loan has a government guarantee that is not separable from the
	loan before foreclosure; 2) at the time of foreclosure, the creditor has the intent to convey the real
	estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim; and 3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The ASU is effective for interim and annual periods beginning after December 15, 2014. The amendments can be adopted using either a prospective transition method or a modified retrospective transition method. The adoption of this accounting guidance is not expected to have a material effect on the Corporation's financial position or results of operations.
	FASB ASU 2014–12, Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved After the Requisite Service Period — a consensus of the FASB Emerging Issues Task Force. The amendments in this update clarify that entities should treat performance targets that can be met after the requisite service period of a share-based payment award as performance conditions that affect vesting. Therefore, an entity would not record compensation expense (measured as of the grant date without taking into account the effect of the performance target) related to an award for which transfer to the employee is contingent on the entity’s satisfaction of a performance target until it becomes probable that the performance target will be met. The ASU does not contain any new disclosure requirements. The ASU is effective for interim and annual reporting periods beginning after December 15, 2015. Early adoption is permitted. In addition, entities will have the option of applying the guidance either prospectively (i.e., only to awards granted or modified on or after the effective date) or retrospectively. Retrospective application would only apply to awards with performance targets outstanding at or after the beginning of the first annual period presented (i.e., the earliest presented comparative period). The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements.
	FASB ASU 2014-11, Transfers and Servicing: Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. The amendments in this update require entities to account for repurchase-to-maturity transactions as secured borrowings (rather than as sales with forward repurchase agreements), eliminate accounting guidance on linking repurchase financing transactions, and expand disclosure requirements related to certain transfers of financial assets that are accounted for as sales and certain transfers, such as repos, securities lending transactions, and repurchase-to-maturity transactions, accounted for as secured borrowings. The amendments in ASU 2014-11 are effective for the first interim or annual period beginning after December 15, 2014. The amendments must present changes in accounting for transactions outstanding on the effective date as a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. Early application is prohibited. The adoption of this accounting guidance is not expected to have a material effect on the Corporation's financial position or results of operations.
	FASB ASU 2014-09, Revenue from Contracts with Customers. The amendments in this update supersede virtually all existing GAAP revenue recognition guidance, including most industry-specific revenue recognition guidance. ASU 2014-09 creates a single, principle-based revenue recognition framework and will require entities to apply significantly more judgment and expanded disclosures surrounding revenue recognition. The core principle requires an entity to recognize revenue in a manner that depicts the transfer of goods or services to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 applies to contracts with customers to provide goods and services, with certain exclusions such as lease contracts, financing arrangements, and financial instruments. The amendments in ASU 2014-09 are effective for fiscal years beginning after December 15, 2016. The amendments can be adopted using either the full retrospective approach or a modified retrospective approach. Early adoption is prohibited. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements.
	FASB ASU 2014-08, Presentation of Financial Statements and Property, Plant, and Equipment: Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. The amendments in this update change the definition of a discontinued operation in ASC 205-20 and require additional disclosures for transactions that meet the definition of a discontinued operation and certain other significant transactions that do not meet the discontinued operations criteria. The amendments in ASU 2014-08 are effective prospectively for all disposals, except disposals classified as held for sale before the adoption date or components initially classified as held for sale in periods beginning on or after December 15, 2014, with early adoption permitted. The adoption of this accounting guidance is not expected to have a material effect on the Corporation's financial position or results of operations.
	FASB ASU 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. ASU 2014-04 amends the guidance in ASC 310-40 by clarifying when an in-substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan. Additionally, the amendments require interim and annual disclosure of both 1) the amount of foreclosed residential real estate property held by the creditor and 2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The amendments in ASU 2014-04 are effective for annual periods, and interim period within those annual periods, beginning after December 15, 2014. The amendments can either be adopted using a modified retrospective or a prospective transition method. The adoption of this accounting guidance is not expected to have a material effect on the Corporation's financial position or results of operations.

Investment_Securities

Investment Securities	9 Months Ended
	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Investment Securities	'
	Investment Securities
	The following tables provide the amortized cost and fair value for the major categories of held-to-maturity and available-for-sale securities. Held-to-maturity securities are carried at amortized cost, which reflects historical cost, adjusted for amortization of premiums and accretion of discounts. Available-for-sale securities are carried at fair value with net unrealized gains or losses reported on an after tax basis as a component of OCI in shareholders' equity.
			September 30, 2014
	(In thousands)		Amortized				Gross Unrealized Gains				Gross Unrealized Losses				Fair
			Cost												Value
	Securities available-for-sale
	Debt securities
		U.S. states and political subdivisions	$	229,528			$	8,146			$	(607	)		$	237,067
		Residential mortgage-backed securities:
		U.S. government agencies	983,038				20,395				(7,046		)		996,387
		Commercial mortgage-backed securities:
		U.S. government agencies	86,485				167				(1,888		)		84,764
		Residential collateralized mortgage-backed securities:
		U.S. government agencies	1,635,780				3,512				(38,975		)		1,600,317
		Non-agency	7				—				—				7
		Commercial collateralized mortgage-backed securities:
		U.S. government agencies	195,512				298				(1,793		)		194,017
		Asset-backed securities:
		Collateralized loan obligations	297,389				289				(7,257		)		290,421
		Corporate debt securities	61,638				—				(7,044		)		54,594
		Total debt securities	3,489,377				32,807				(64,610		)		3,457,574
	Equity securities
		Marketable equity securities	2,916				—				—				2,916
		Non-marketable equity securities	2,500				—				—				2,500
		Total equity securities	5,416				—				—				5,416
		Total securities available for sale	$	3,494,793			$	32,807			$	(64,610	)		$	3,462,990
	Securities held-to-maturity
	Debt securities
		U.S. treasuries	$	5,000			$	3			$	—			$	5,003
		U.S. government agency debentures	25,000				—				(756		)		24,244
		U.S. states and political subdivisions	539,014				12,256				(452		)		550,818
		Residential mortgage-backed securities:
		U.S. government agencies	602,220				4,608				(5,992		)		600,836
		Commercial mortgage-backed securities:
		U.S. government agencies	65,704				28				(676		)		65,056
		Residential collateralized mortgage-backed securities:
		U.S. government agencies	1,415,421				66				(56,260		)		1,359,227
		Commercial collateralized mortgage-backed securities:
		U.S. government agencies	258,436				346				(8,570		)		250,212
		Corporate debt securities	91,467				489				(180		)		91,776
		Total securities held to maturity	$	3,002,262			$	17,796			$	(72,886	)		$	2,947,172
			December 31, 2013
	(In thousands)		Amortized				Gross Unrealized Gains				Gross Unrealized Losses				Fair
			Cost												Value
	Securities available-for-sale
	Debt securities
		U.S. states and political subdivisions	$	258,787			$	7,376			$	(3,796	)		$	262,367
		Residential mortgage-backed securities:
		U.S. government agencies	962,687				21,662				(14,427		)		969,922
		Commercial mortgage-backed securities:
		U.S. government agencies	72,048				7				(2,488		)		69,567
		Residential collateralized mortgage-backed securities:
		U.S. government agencies	1,566,262				4,199				(52,068		)		1,518,393
		Non-agency	9				—				—				9
		Commercial collateralized mortgage-backed securities:
		U.S. government agencies	104,152				273				(2,157		)		102,268
		Asset-backed securities:
		Collateralized loan obligations	297,259				760				(4,332		)		293,687
		Corporate debt securities	61,596				—				(10,952		)		50,644
		Total debt securities	3,322,800				34,277				(90,220		)		3,266,857
	Equity securities
		Marketable equity securities	3,036				—				—				3,036
		Non-marketable equity securities	3,281				—				—				3,281
	Total equity securities	6,317				—				—				6,317
	Total securities available for sale	$	3,329,117			$	34,277			$	(90,220	)		$	3,273,174
Securities held-to-maturity
Debt securities
	U.S. Treasuries	$	5,000			$	4			$	—			$	5,004
	U.S. government agencies debentures	25,000				—				(1,348		)		23,652
	U.S. states and political subdivisions	480,703				5,335				(10,459		)		475,579
	Residential mortgage-backed securities:
	U.S. government agencies	569,960				1,108				(11,617		)		559,451
	Commercial mortgage-backed securities:
	U.S. government agencies	56,596				—				(1,190		)		55,406
	Residential collateralized mortgage-backed securities:
	U.S. government agencies	1,464,732				—				(81,818		)		1,382,914
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies	240,069				6				(11,052		)		229,023
	Corporate debt securities	93,628				308				(725		)		93,211
	Total securities held to maturity	$	2,935,688			$	6,761			$	(118,209	)		$	2,824,240
		September 30, 2013
(In thousands)		Amortized				Gross Unrealized Gains				Gross Unrealized Losses				Fair
		Cost												Value
Securities available-for-sale
Debt securities
	U.S. states and political subdivisions	$	267,470			$	8,249			$	(3,495	)		$	272,224
	Residential mortgage-backed securities:
	U.S. government agencies	983,255				26,155				(10,035		)		999,375
	Commercial mortgage-backed securities:
	U.S. government agencies	58,129				23				(2,220		)		55,932
	Residential collateralized mortgage-backed securities:
	U.S. government agencies	1,538,991				5,710				(38,995		)		1,505,706
	Non-agency	9				—				—				9
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies	98,440				404				(1,690		)		97,154
	Asset-backed securities:
	Collateralized loan obligations	271,856				71				(3,295		)		268,632
	Corporate debt securities	61,582				—				(10,732		)		50,850
	Total debt securities	3,279,732				40,612				(70,462		)		3,249,882
Equity Securities
	Marketable equity securities	3,096				—				—				3,096
	Non-marketable equity securities	3,281				—				—				3,281
	Total equity securities	6,377				—				—				6,377
	Total securities available for sale	$	3,286,109			$	40,612			$	(70,462	)		$	3,256,259
Securities held-to-maturity
Debt securities
	U.S. treasuries	$	5,000			$	5			$	—			$	5,005
	U.S. government agency debentures	25,000				—				(1,136		)		23,864
	U.S states and political subdivisions	453,230				5,093				(9,257		)		449,066
	Residential mortgage-backed securities:
	U.S. government agencies	377,980				1,068				(8,578		)		370,470
	Commercial mortgage-backed securities:
	U.S. government agencies	50,179				12				(1,025		)		49,166
	Residential collateralized mortgage-backed securities:
	U.S. government agencies	1,523,792				179				(68,719		)		1,455,252
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies	220,410				—				(8,936		)		211,474
	Corporate debt securities	94,343				294				(501		)		94,136
	Total securities held to maturity	$	2,749,934			$	6,651			$	(98,152	)		$	2,658,433
The Corporation's U.S. states and political subdivisions portfolio is composed of general obligation bonds issued by a highly diversified number of states, cities, counties, and school districts. The amortized cost and fair value of the Corporation's portfolio of general obligation bonds are summarized by U.S. state in the tables below. As illustrated in the tables below, the aggregate fair value of the Corporation's general obligation bonds was greater than $10.0 million in eleven of the thirty-seven U.S. states in which it holds investments.
(Dollars in thousands)	September 30, 2014
U.S. State	# of Issuers			Average Issue Size, Fair Value				Amortized Cost				Fair Value
Ohio	149			$	1,066			$	155,088			$	158,825
Michigan	175			856				145,897				149,715
Illinois	72			1,618				113,017				116,517
Wisconsin	83			846				67,681				70,251
Texas	63			800				49,440				50,431
Pennsylvania	47			987				46,010				46,389
Minnesota	41			685				27,476				28,074
Washington	30			989				29,011				29,658
New Jersey	36			754				26,145				27,143
Missouri	19			1,019				18,814				19,357
New York	19			618				11,448				11,734
Other	122			641				76,879				78,034
Total general obligation bonds	856			$	918			$	766,906			$	786,128
(Dollars in thousands)	December 31, 2013
U.S. State	# of Issuers			Average Issue Size, Fair Value				Amortized Cost				Fair Value
Ohio	152			$	1,048			$	158,641			$	159,232
Michigan	166			744				122,198				123,571
Illinois	75			1,314				96,863				98,521
Wisconsin	86			648				54,516				55,747
Texas	69			771				54,295				53,204
Pennsylvania	50			898				47,835				44,883
Minnesota	45			663				29,840				29,816
Washington	30			930				28,393				27,906
New Jersey	38			722				27,101				27,440
Missouri	20			969				19,253				19,382
New York	22			585				13,064				12,878
California	18			599				10,651				10,788
Other	115			631				74,918				72,572
Total general obligation bonds	886			$	831			$	737,568			$	735,940
(Dollars in thousands)	September 30, 2013
U.S. State	# of Issuers			Average Issue Size, Fair Value				Amortized Cost				Fair Value
Ohio	153			$	945			$	145,769			$	144,584
Illinois	68			1,017				69,302				69,149
Texas	69			774				54,428				53,427
Pennsylvania	55			894				51,556				49,194
Wisconsin	82			640				51,572				52,448
Minnesota	46			658				30,115				30,278
New Jersey	38			726				27,130				27,604
Michigan	178			823				140,651				146,448
Washington	31			943				29,594				29,222
Missouri	20			978				19,303				19,552
New York	22			590				13,082				12,970
California	18			604				10,666				10,873
Other	116			634				75,569				73,495
Total general obligation bonds	896			$	803			$	718,737			$	719,244
The Corporation's investment policy states that municipal securities purchased are to be investment grade and allows for a 20% maximum portfolio concentration in municipal securities with a combined individual state to total municipal outstanding equal to or less than 25%. A municipal security is investment grade if (1) the security has a low risk of default by the obligor and (2) the full and timely payment of principal and interest is expected over the anticipated life of the instrument. The fact that a municipal security is rated by one nationally recognized credit rating agency is indicative, but not sufficient evidence, that a municipal security is investment grade. In all cases, the Corporation considers and documents within a security pre-purchase analysis factors such as capacity to pay, market and economic data, and such other factors as are available and relevant to the security or issuer. Factors to be considered in the ongoing monitoring of municipal securities and in the pre-purchase analysis include soundness of budgetary position and sources of revenue, financial strength, and stability of tax or enterprise revenues. The Corporation also considers spreads to U.S. Treasuries on comparable bonds of similar credit quality, in addition to the above analysis, to assess whether municipal securities are investment grade. The Corporation performs a risk analysis for any security that is downgraded below investment grade to determine if the security should be retained or sold. This risk analysis includes, but is not limited to, discussions with the Corporation's credit department as well as third-party municipal credit analysts and review of the nationally recognized credit rating agency's analysis describing the downgrade.
The Corporation's evaluation of its municipal bond portfolio at September 30, 2014 did not uncover any facts or circumstances resulting in significantly different credit ratings than those assigned by a nationally recognized credit rating agency.
FRB and FHLB stock constitute the majority of other investments on the Consolidated Balance Sheets.
(In thousands)	30-Sep-14				31-Dec-13				30-Sep-13
FRB stock	$	55,435			$	55,294			$	55,294
FHLB stock	92,547				125,032				214,586
Other	439				477				489
Total other investments	$	148,421			$	180,803			$	270,369
FRB and FHLB stock are classified as restricted investments, carried at cost and valued based on the ultimate recoverability of par value. Cash and stock dividends received on the stock are reported as interest income. There are no identified events or changes in circumstances that may have a significant adverse effect on these investments carried at cost.
Securities with a carrying value of $3.3 billion, $3.2 billion, and $3.4 billion at September 30, 2014, December 31, 2013, and September 30, 2013, respectively, were pledged to secure trust and public deposits and securities sold under agreements to repurchase and for other purposes required or permitted by law.
Realized Gains and Losses
The following table presents the gross realized gains and losses on the sales of those securities that have been included in earnings as a result of those sales. Gains or losses on the sales of available-for-sale securities are recognized upon sale and are determined using the specific identification method.
	Three Months Ended September 30,								Nine Months Ended September 30,
(In thousands)	2014				2013				2014				2013
Realized gains	$	45			$	—			$	345			$	3,786
Realized losses	(31		)		—				(195		)		(6,589		)
Net securities (losses)/gains	$	14			$	—			$	150			$	(2,803	)
Gross Unrealized Losses and Fair Value
The following table presents the gross unrealized losses and fair value of securities by length of time that individual securities had been in a continuous loss position by major categories of available-for-sale and held-to-maturity securities.
			September 30, 2014
			Less than 12 months										12 months or longer									Total
(In thousands)			Fair Value				Unrealized				Number		Fair Value			Unrealized				Number		Fair Value				Unrealized
							Losses				of					Losses				of						Losses
											Securities									Securities
Securities available-for-sale
Debt securities
	U.S. states and political subdivisions		$	5,298			$	(10	)		5		$	22,729		$	(597	)		37		$	28,027			$	(607	)
	Residential mortgage-backed securities:
	U.S. government agencies		25,456				(86		)		2		248,946			(6,960		)		19		274,402				(7,046		)
	Commercial mortgage-backed securities:
	U.S. government agencies		9,095				(56		)		2		45,208			(1,832		)		6		54,303				(1,888		)
	Residential collateralized mortgage-backed securities:
	U.S. government agencies		436,857				(3,528		)		29		890,497			(35,447		)		63		1,327,354				(38,975		)
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies		61,703				(264		)		6		67,029			(1,529		)		7		128,732				(1,793		)
	Asset-backed securities:
	Collateralized loan obligations		100,337				(1,904		)		13		151,668			(5,353		)		23		252,005				(7,257		)
	Corporate debt securities		—				—				0		54,594			(7,044		)		8		54,594				(7,044		)
	Total available-for-sale securities		$	638,746			$	(5,848	)		57		$	1,480,671		$	(58,762	)		163		$	2,119,417			$	(64,610	)
Securities held-to-maturity
Debt securities
	U.S. government agency debentures		$	—			$	—			0		$	24,244		$	(756	)		1		$	24,244			$	(756	)
	U.S. states and political subdivisions		16,255				(78		)		20		29,783			(374		)		38		46,038				(452		)
	Residential mortgage-backed securities:
	U.S. government agencies		10,549				(64		)		1		188,704			(5,928		)		10		199,253				(5,992		)
	Commercial mortgage-backed securities:
	U.S. government agencies		26,346				(110		)		5		23,788			(566		)		3		50,134				(676		)
	Residential collateralized mortgage-backed securities:
	U.S. government agencies		121,516				(1,195		)		8		1,208,939			(55,065		)		60		1,330,455				(56,260		)
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies		8,026				(30		)		1		182,299			(8,540		)		17		190,325				(8,570		)
	Collateralized loan obligations:
	Non-agency		—				—				0		—			—				0		—				—
	Corporate debt securities		46,907				(180		)		16		—			—				0		46,907				(180		)
	Total held-to-maturity securities		$	229,599			$	(1,657	)		51		$	1,657,757		$	(71,229	)		129		$	1,887,356			$	(72,886	)
			December 31, 2013
			Less than 12 months											12 months or longer										Total
(In thousands)			Fair Value				Unrealized				Number			Fair Value			Unrealized				Number			Fair Value				Unrealized
							Losses				of						Losses				of Securities							Losses
											Securities
Securities available-for-sale
	Debt securities:
	U.S. states and political subdivisions		$	38,039			$	(1,996	)		65			$	14,157		$	(1,800	)		25			$	52,196			$	(3,796	)
	Residential mortgage-backed securities:
	U.S. government agencies		434,761				(13,109		)		35			14,890			(1,318		)		2			449,651				(14,427		)
	Commercial mortgage-backed securities:
	U.S. government agencies		33,387				(1,491		)		5			16,944			(997		)		2			50,331				(2,488		)
	Residential collateralized mortgage-backed securities:
	U.S. government agencies		1,135,151				(44,775		)		74			100,530			(7,293		)		7			1,235,681				(52,068		)
	Nonagency		—				—				—			1			—				1			1				—
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies		43,747				(2,055		)		6			2,525			(102		)		1			46,272				(2,157		)
	Asset-backed securities
	Collateralized loan obligations		223,458				(4,332		)		33			—			—				—			223,458				(4,332		)
	Corporate debt securities		—				—				—			50,644			(10,952		)		8			50,644				(10,952		)
	Total available-for-sale securities		$	1,908,543			$	(67,758	)		218			$	199,691		$	(22,462	)		46			$	2,108,234			$	(90,220	)
Securities held-to-maturity
	Debt securities:
	U.S. government agency debentures		$	23,652			$	(1,348	)		1			$	—		$	—			—			$	23,652			$	(1,348	)
	U.S. states and political subdivisions		222,154				(10,276		)		353			2,478			(183		)		6			224,632				(10,459		)
	Residential mortgage-backed securities:
	U.S. government agencies		422,192				(11,617		)		22			—			—				—			422,192				(11,617		)
	Commercial mortgage-backed securities:
	U.S. government agencies		48,831				(1,190		)		8			—			—				—			48,831				(1,190		)
	Residential collateralized mortgage-backed securities:
	U.S. government agencies		1,382,915				(81,818		)		66			—			—				—			1,382,915				(81,818		)
	Nonagency
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies		208,863				(11,052		)		19			—			—				—			208,863				(11,052		)
	Collateralized loan obligations
	Nonagency
	Corporate debt securities		64,541				(725		)		23			—			—				—			64,541				(725		)
	Total held-to-maturity securities		$	2,373,148			$	(118,026	)		492			$	2,478		$	(183	)		6			$	2,375,626			$	(118,209	)
			September 30, 2013
			Less than 12 months											12 months or longer										Total
(In thousands)			Fair Value				Unrealized				Number			Fair Value			Unrealized				Number			Fair Value				Unrealized
							Losses				of						Losses				of							Losses
											Securities										Securities
Securities available-for-sale
Debt securities
	U.S. states and political subdivisions		$	57,258			$	(3,495	)		100			$	—		$	—			—			$	57,258			$	(3,495	)
	Residential mortgage-backed securities:
	U.S. government agencies		309,239				(10,035		)		23			—			—				—			309,239				(10,035		)
	Commercial mortgage-backed securities:
	U.S. government agencies		50,823				(2,220		)		7			—			—				—			50,823				(2,220		)
	Residential collateralized mortgage-backed securities:
	U.S. government agencies		1,073,105				(38,995		)		69			—			—				—			1,073,105				(38,995		)
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies		38,938				(1,690		)		5			—			—				—			38,938				(1,690		)
	Asset-backed securities
	Collateralized loan obligations		165,359				(3,295		)		26			—			—				—			165,359				(3,295		)
	Corporate debt securities		—				—				—			50,850			(10,732		)		8			50,850				(10,732		)
	Total available-for-sale securities		$	1,694,722			$	(59,730	)		230			$	50,850		$	(10,732	)		8			$	1,745,572			$	(70,462	)
Securities held-to-maturity
Debt securities
	U.S. government agency debentures		$	23,864			$	(1,136	)		1			$	—		$	—			—			$	23,864			$	(1,136	)
	U.S. states and political subdivisions		226,853				(9,243		)		362			987			(14		)		1			227,840				(9,257		)
	Residential mortgage-backed securities:
	U.S. government agencies		252,007				(8,578		)		13			—			—				—			252,007				(8,578		)
	Commercial mortgage-backed securities:
	U.S. government agencies		44,168				(1,025		)		7			—			—				—			44,168				(1,025		)
	Residential collateralized mortgage securities:
	U.S. government agencies		1,416,238				(68,719		)		64			—			—				—			1,416,238				(68,719		)
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies		191,402				(8,936		)		18			—			—				—			191,402				(8,936		)
	Corporate debt securities		66,774				(501		)		24			—			—				—			66,774				(501		)
	Total held-to-maturity securities		$	2,221,306			$	(98,138	)		489			$	987		$	(14	)		1			$	2,222,293			$	(98,152	)
At least quarterly, the Corporation conducts a comprehensive security-level impairment assessment on all securities in an unrealized loss position to determine if OTTI exists. An unrealized loss exists when the current fair value of an individual security is less than its amortized cost basis. Under the current OTTI accounting model for debt securities, an OTTI loss must be recognized for a debt security in an unrealized loss position if the Corporation intends to sell the security or it is more likely than not that the Corporation will be required to sell the security before recovery of its amortized cost basis. In this situation, the amount of loss recognized in income is equal to the difference between the fair value and the amortized cost basis of the security. Even if the Corporation does not expect to sell the security, the Corporation must evaluate the expected cash flows to be received to determine if a credit loss has occurred. In the event of a credit loss, only the amount of impairment associated with the credit loss is recognized in income. The portion of the unrealized loss relating to other factors, such as liquidity conditions in the market or changes in market interest rates, is recorded in OCI. Equity securities are also evaluated to determine whether the unrealized loss is expected to be recoverable based on whether evidence exists to support a realizable value equal to or greater than the amortized cost basis. If it is probable that the Corporation will not recover the amortized cost basis, taking into consideration the estimated recovery period and its ability to hold the equity security until recovery, OTTI is recognized.
The security-level assessment is performed on each security, regardless of the classification of the security as available for sale or held to maturity. The assessments are based on the nature of the securities, the financial condition of the issuer, the extent and duration of the securities, the extent and duration of the loss and the intent and whether Management intends to sell or it is more likely than not that it will be required to sell a security before recovery of its amortized cost basis, which may be maturity. For those securities which the assessment shows the Corporation will recover the entire cost basis, Management does not intend to sell these securities and it is not more likely than not that the Corporation will be required to sell them before the anticipated recovery of the amortized cost basis, the gross unrealized losses are recognized in OCI, net of tax.
The investment securities portfolio was in a net unrealized loss position of $31.8 million at September 30, 2014, compared to a net unrealized loss position of $55.9 million at December 31, 2013 and a net unrealized loss position of $29.9 million at September 30, 2013. Gross unrealized losses were $64.6 million as of September 30, 2014, compared to $90.2 million at December 31, 2013, and $70.5 million at September 30, 2013. As of September 30, 2014, gross unrealized losses are concentrated within agency MBS, CLOs, and corporate debt securities. The fair values of the agency MBSs have been impacted by the rising interest rate environment relative to when they were purchased. The fair value of the CLOs have been impacted by increased supply which has widened spreads. Corporate debt securities are composed of eight, single issuer, trust preferred securities with stated maturities. Such investments are less than 2% of the fair value of the entire investment portfolio. None of the corporate issuers have deferred paying dividends on their issued trust preferred shares in which the Corporation is invested. The fair values of these investments have been impacted by the market conditions which have caused risk premiums to increase, resulting in the decline in the fair value of the trust preferred securities.
Management believes the Corporation will fully recover the cost of these agency MBSs, CLOs, and corporate debt securities, and it does not intend to sell these securities and it is not more likely than not that it will be required to sell them before the anticipated recovery of the remaining amortized cost basis, which may be maturity. As a result, Management concluded that these securities were not other-than-temporarily impaired at September 30, 2014 and has recognized the total amount of the impairment in OCI, net of tax.
The Corporation also holds $290.4 million of CLOs with a gross unrealized loss position of $7.3 million as of September 30, 2014. The new Volcker regulations, as originally adopted, may affect the Corporation's ability to hold these CLOs. Management believes that its holdings of CLOs are not ownership interests in a covered fund prohibited by the Volcker regulations and, therefore, expects to be able to hold these investments until their stated maturities with no restriction.
Contractual Maturity of Debt Securities
The following table shows the remaining contractual maturities and contractual yields of debt securities held-to-maturity and available-for-sale as of September 30, 2014. Estimated lives on MBSs may differ from contractual maturities as issuers may have the right to call or prepay obligations with or without call or prepayment penalties.

Loans_Notes

Loans (Notes)	9 Months Ended
	Sep. 30, 2014
Loans and Leases Receivable Disclosure [Abstract]	'
Financing Receivables	'
	Loans
	Loans outstanding as of September 30, 2014, December 31, 2013, and September 30, 2013, net of unearned income, consisted of the following:
	(In thousands)		September 30, 2014				December 31, 2013				September 30, 2013
	Originated loans:
	Commercial		$	7,626,166			$	6,648,279			$	6,420,369
	Residential mortgage		605,998				529,253				487,283
	Installment		2,277,533				1,727,925				1,647,095
	Home equity		1,062,013				920,066				889,372
	Credit cards		160,113				148,313				145,113
	Leases		339,936				239,551				199,907
		Total originated loans	12,071,759				10,213,387				9,789,139
	Allowance for originated loan losses		(90,883		)		(96,484		)		(98,291		)
		Net originated loans	$	11,980,876			$	10,116,903			$	9,690,848
	Acquired loans:
	Commercial		$	1,272,244			$	1,725,970			$	1,963,746
	Residential mortgage		410,065				470,652				466,594
	Installment		809,820				1,004,569				1,080,298
	Home equity		252,975				294,424				306,783
		Total acquired loans	2,745,104				3,495,615				3,817,421
	Allowance for acquired loan losses		(6,206		)		(741		)		—
		Net acquired loans	$	2,738,898			$	3,494,874			$	3,817,421
	Covered loans:
	Commercial		$	262,319			$	375,860			$	422,225
	Residential mortgage		43,672				50,679				52,796
	Installment		5,148				6,162				6,361
	Home equity		83,278				97,442				102,908
	Loss share receivable		30,746				61,827				69,986
		Total covered loans	425,163				591,970				654,276
	Allowance for covered loan losses		(42,988		)		(44,027		)		(45,544		)
		Net covered loans	$	382,175			$	547,943			$	608,732
	Total loans:
	Commercial		$	9,160,729			$	8,750,109			$	8,806,340
	Residential mortgage		1,059,735				1,050,584				1,006,673
	Installment		3,092,501				2,738,656				2,733,754
	Home equity		1,398,266				1,311,932				1,299,063
	Credit cards		160,113				148,313				145,113
	Leases		339,936				239,551				199,907
	Loss share receivable		30,746				61,827				69,986
		Total loans	15,242,026				14,300,972				14,260,836
	Total allowance for loan losses		(140,077		)		(141,252		)		(143,835		)
		Total Net loans	$	15,101,949			$	14,159,720			$	14,117,001
	The following describes the distinction between originated, acquired and covered loan portfolios and certain significant accounting policies relevant to each of these portfolios.
	Originated Loans
	Loans originated for investment are stated at their principal amount outstanding adjusted for partial charge-offs, and net deferred loan fees and costs. Interest income on loans is accrued over the term of the loans primarily using the "simple-interest" method based on the principal balance outstanding. Interest is not accrued on loans where collectability is uncertain. Accrued interest is presented separately in the consolidated balance sheet, except for accrued interest on credit card loans, which is included in the outstanding loan balance. Loan origination fees and certain direct costs incurred to extend credit are deferred and amortized over the term of the loan or loan commitment period as an adjustment to the related loan yield. Net deferred loan origination fees and costs amounted to $6.4 million, $6.6 million and $7.5 million at September 30, 2014, December 31, 2013, and September 30, 2013, respectively.
	Acquired Loans
	Acquired loans are those purchased in the Citizens acquisition. These loans were recorded at estimated fair value at the Acquisition Date with no carryover of the related ALL. The acquired loans were segregated between those considered to be performing (“non-impaired acquired loans”) and those with evidence of credit deterioration (“acquired impaired loans”). Acquired loans are considered impaired if there is evidence of credit deterioration and if it is probable, at acquisition, all contractually required payments will not be collected. Revolving loans, including lines of credit, are excluded from acquired impaired loan accounting.
	Total outstanding acquired impaired loans as of September 30, 2014 and 2013 were $659.7 million and $902.9 million, respectively. The outstanding balance of these loans is the undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loans, owed at the reporting date, whether or not currently due and whether or not any such amounts have been charged off. Changes in the carrying amount and accretable yield for acquired impaired loans were as follows for the three and nine months ended September 30, 2014 and 2013:
		Three Months Ended September 30,															Nine Months Ended September 30,
	Acquired Impaired Loans	2014								2013							2014						2013
	(In thousands)	Accretable Yield				Carrying Amount of Loans				Accretable Yield				Carrying Amount of Loans			Accretable Yield			Carrying Amount of Loans			Accretable Yield			Carrying Amount of Loans
	Balance at beginning of period	$	137,442			$	519,250			$	120,067			$	752,682		$	136,646		$	601,000		$	—		$	—
	Additions due to Citizens acquisition on April 12, 2013	—				—				—				—			—			—			131,558			819,715
	Accretion	(12,950		)		12,950				(8,914		)		8,914			(37,437		)	37,437			(18,004		)	18,004
	Net reclassifications from nonaccretable to accretable	6,646				—				—				—			36,659			—			—			—
	Payments received, net	—				(53,150		)		—				(90,729		)	—			(159,387		)	—			(166,852		)
	Disposals	(4,714		)		—				(4,546		)		—			(9,444		)	—			(6,947		)	—
	Balance at end of period	$	126,424			$	479,050			$	106,607			$	670,867		$	126,424		$	479,050		$	106,607		$	670,867
	Covered Loans and Related Loss Share Receivable
	The loans purchased in the 2010 FDIC-assisted acquisitions of George Washington and Midwest are covered by loss sharing agreements between the FDIC and the Corporation that afford the Bank significant loss protection. These covered loans were recorded at estimated fair value at the date of acquisition with no carryover of the related ALL and are accounted for as acquired impaired loans. A loss share receivable was recorded at the date of acquisition which represents the estimated fair value of reimbursement the Corporation expects to receive from the FDIC for incurred losses on certain covered loans. These expected reimbursements are recorded as part of covered loans.
	Changes in the loss share receivable associated with covered loans for the three and nine months ended September 30, 2014 and 2013 were as follows:
	Loss Share Receivable	Three Months Ended September 30,								Nine Months Ended September 30,
	(In thousands)	2014				2013				2014				2013
	Balance at beginning of period	$	43,981			$	83,910			$	61,827			$	113,734
Amortization	(6,932		)		(5,226		)		(16,980		)		(19,327		)
Increase/(decrease) due to impairment (recapture) on covered loans	2,908				1,032				3,835				8,890
FDIC reimbursement	(7,006		)		(7,284		)		(13,330		)		(23,231		)
Covered loans paid in full	(2,205		)		(2,446		)		(4,606		)		(10,080		)
Balance at end of the period	$	30,746			$	69,986			$	30,746			$	69,986
Total outstanding covered impaired loans were $520.3 million and $811.3 million as of September 30, 2014 and 2013, respectively. The outstanding balance of these loans is the undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loans, owed at the reporting date, whether or not currently due and whether or not any such amounts have been charged off. Changes in the carrying amount and accretable yield for covered impaired loans were as follows for the three and nine months ended September 30, 2014 and 2013:
	Three Months Ended September 30,															Nine Months Ended September 30,
Covered Impaired Loans	2014								2013							2014						2013
(In thousands)	Accretable				Carrying				Accretable				Carrying			Accretable			Carrying			Accretable			Carrying
	Yield				Amount of				Yield				Amount of			Yield			Amount of			Yield			Amount of
					Loans								Loans						Loans						Loans
Balance at beginning of period	$	53,655			$	316,481			$	81,758			$	537,257		$	67,282		$	403,692		$	113,288		$	762,386
Accretion	(9,683		)		9,683				(14,056		)		14,056			(34,438		)	34,438			(51,327		)	51,327
Net reclassifications from non-accretable to accretable	8,684				—				12,745				—			20,290			—			28,726			—
Payments received, net	—				(41,598		)		—				(103,514		)	—			(153,564		)	—			(365,914		)
Disposals	(711		)		—				(1,309		)		—			(1,189		)	—			(11,549		)	—
Balance at end of period	$	51,945			$	284,566			$	79,138			$	447,799		$	51,945		$	284,566		$	79,138		$	447,799
Credit Quality Disclosures
The credit quality of the Corporation's loan portfolios is assessed as a function of net credit losses, levels of nonperforming assets and delinquencies, and credit quality ratings as defined by the Corporation. These credit quality ratings are an important part of the Corporation's overall credit risk management process and evaluation of the allowance for credit losses.
Generally, loans, except for certain commercial, credit card and mortgage loans, and leases on which payments are past due for 90 days are placed on nonaccrual status, unless those loans are in the process of collection and, in Management's opinion, are fully secured. Credit card loans on which payments are past due for 120 days are placed on nonaccrual status. Acquired and covered impaired loans are considered to be accruing and performing even though collection of contractual payments may be in doubt because income continues to be accreted on the loan pool as long as expected cash flows are reasonably estimable.
When a loan is placed on nonaccrual status, interest deemed uncollectible which had been accrued in prior years is charged against the ALL and interest deemed uncollectible accrued in the current year is reversed against interest income. Interest on mortgage loans is accrued until Management deems it uncollectible based upon the specific identification method. Payments subsequently received on nonaccrual loans are generally applied to principal. A loan is returned to accrual status when principal and interest are no longer past due and collectability is probable. This generally requires timely principal and interest payments for a minimum of six consecutive payment cycles. Loans are generally written off when deemed uncollectible or when they reach a predetermined number of days past due depending upon loan product, terms and other factors.
The following tables provide a summary of loans by portfolio type, including the delinquency status of those loans that continue to accrue interest and those loans that are nonaccrual:
As of September 30, 2014
(In thousands)																						≥ 90 Days
Originated Loans	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (a)			Loans
Commercial
C&I	$	1,833			$	321			$	3,302			$	5,456		$	5,033,864		$	5,039,320		$	120		$	12,124
CRE	4,111				1,251				5,918				11,280			2,108,454			2,119,734			523			10,223
Construction	255				—				—				255			466,857			467,112			—			—
Leases	—				—				—				—			339,936			339,936			—			—
Consumer
Installment	12,040				3,553				4,353				19,946			2,257,587			2,277,533			3,630			3,205
Home Equity Lines	1,975				538				705				3,218			1,058,795			1,062,013			390			1,426
Credit Cards	746				434				688				1,868			158,245			160,113			423			412
Residential Mortgages	11,533				2,836				7,703				22,072			583,926			605,998			3,452			11,931
Total	$	32,493			$	8,933			$	22,669			$	64,095		$	12,007,664		$	12,071,759		$	8,538		$	39,321
Acquired Loans																						≥ 90 Days
	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (c)			Loans (c)
Commercial
C&I	$	626			$	5,478			$	5,303			$	11,407		$	540,082		$	551,489		$	—		$	876
CRE	4,568				2,269				20,776				27,613			682,882			710,495			370			2,072
Construction	3,179				—				687				3,866			6,394			10,260			—			—
Consumer
Installment	6,764				2,164				1,045				9,973			799,847			809,820			542			1,059
Home Equity Lines	2,540				1,234				2,872				6,646			246,329			252,975			1,279			680
Residential Mortgages	262				2,724				5,710				8,696			401,369			410,065			520			1,305
Total	$	17,939			$	13,869			$	36,393			$	68,201		$	2,676,903		$	2,745,104		$	2,711		$	5,992
Covered Loans (b)																						≥ 90 Days
	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (c)			Loans (c)
Commercial
C&I	$	288			$	—			$	6,535			$	6,823		$	49,253		$	56,076		n/a			n/a
CRE	1,656				1,524				66,219				69,399			123,347			192,746			n/a			n/a
Construction	—				—				11,981				11,981			1,516			13,497			n/a			n/a
Consumer
Installment	67				—				—				67			5,081			5,148			n/a			n/a
Home Equity Lines	2,327				315				4,065				6,707			76,571			83,278			n/a			n/a
Residential Mortgages	6,216				402				3,734				10,352			33,320			43,672			n/a			n/a
Total	$	10,554			$	2,241			$	92,534			$	105,329		$	289,088		$	394,417		n/a			n/a
(a) Installment loans 90 days or more past due and accruing include $2.5 million of loans guaranteed by the U.S. government as of September 30, 2014.
(b) Excludes loss share receivable of $30.7 million as of September 30, 2014.
(c) Acquired and covered impaired loans were not classified as nonperforming assets at September 30, 2014 as the loans are considered to be performing under ASC 310-30. As a result, interest income, through the accretion of the difference between the carrying amount of the loans and the expected cash flows, is being recognized on all acquired and covered impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and covered impaired loans.
As of December 31, 2013
(In thousands)																						≥ 90 Days
Originated Loans	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (a)			Loans
Commercial
C&I	$	8,941			$	994			$	10,622			$	20,557		$	4,119,010		$	4,139,567		$	151		$	11,323
CRE	4,507				2,400				9,688				16,595			2,153,192			2,169,787			460			14,229
Construction	351				21				66				438			338,487			338,925			—			122
Leases	902				—				—				902			238,649			239,551			—			—
Consumer
Installment	15,433				4,050				4,462				23,945			1,703,980			1,727,925			3,735			3,681
Home Equity Lines	1,864				918				965				3,747			916,319			920,066			418			1,819
Credit Cards	729				471				735				1,935			146,378			148,313			404			558
Residential Mortgages	19,858				2,072				9,350				31,280			497,973			529,253			6,008			10,471
Total	$	52,585			$	10,926			$	35,888			$	99,399		$	10,113,988		$	10,213,387		$	11,176		$	42,203
Acquired Loans																						≥ 90 Days
	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing ( c )			Loans ( c )
Commercial
C&I	$	1,295			$	862			$	3,744			$	5,901		$	788,178		$	794,079		$	40		$	795
CRE	5,603				5,281				26,366				37,250			881,395			918,645			403			651
Construction	2,675				—				—				2,675			10,571			13,246			—			—
Consumer
Installment	14,528				4,076				3,354				21,958			982,611			1,004,569			2,263			679
Home Equity Lines	4,774				1,933				3,606				10,313			284,111			294,424			1,039			1,300
Residential Mortgages	3,918				1,426				8,063				13,407			457,245			470,652			403			582
Total	$	32,793			$	13,578			$	45,133			$	91,504		$	3,404,111		$	3,495,615		$	4,148		$	4,007
Covered Loans (b)																						≥ 90 Days
	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (c)			Loans (c)
Commercial
C&I	$	836			$	1,489			$	12,957			$	15,282		$	60,955		$	76,237		n/a			n/a
CRE	2,855				3,443				103,077				109,375			164,219			273,594			n/a			n/a
Construction	2,191				1,917				20,388				24,496			1,533			26,029			n/a			n/a
Consumer
Installment	33				—				—				33			6,130			6,163			n/a			n/a
Home Equity Lines	544				1,467				1,651				3,662			93,780			97,442			n/a			n/a
Residential Mortgages	7,463				1,565				5,165				14,193			36,485			50,678			n/a			n/a
Total	$	13,922			$	9,881			$	143,238			$	167,041		$	363,102		$	530,143		n/a			n/a
(a) Installment loans 90 days or more past due and accruing include $2.1 million of loans guaranteed by the U.S. government as of December 31, 2013.
(b) Excludes loss share receivable of $61.8 million as of December 31, 2013.
(c) Acquired and covered impaired loans were not classified as nonperforming assets at December 31, 2013 as the loans are considered to be performing under ASC 310-30. As a result, interest income, through the accretion of the difference between the carrying amount of the loans and the expected cash flows, is being recognized on all acquired and covered impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and covered impaired loans.
As of September 30, 2013
(In thousands)																						≥ 90 Days
Originated Loans	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (a)			Loans
Commercial
C&I	$	3,571			$	3,889			$	4,931			$	12,391		$	3,851,704		$	3,864,095		$	201		$	5,234
CRE	2,794				1,414				8,976				13,184			2,214,228			2,227,412			1,047			13,821
Construction	—				—				24				24			328,838			328,862			—			85
Leases	726				—				—				726			199,181			199,907			—			—
Consumer
Installment	9,825				3,392				5,378				18,595			1,628,500			1,647,095			4,506			3,894
Home Equity Lines	1,094				498				1,118				2,710			886,662			889,372			500			2,038
Credit Cards	781				434				700				1,915			143,198			145,113			365			422
Residential Mortgages	13,487				3,771				9,344				26,602			460,681			487,283			5,833			10,094
Total	$	32,278			$	13,398			$	30,471			$	76,147		$	9,712,992		$	9,789,139		$	12,452		$	35,588
Acquired Loans																						≥ 90 Days
	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing ( c )			Loans ( c )
Commercial
C&I	$	2,107			$	331			$	2,325			$	4,763		$	972,898		$	977,661		$	—		$	2,029
CRE	3,068				2,816				25,268				31,152			936,751			967,903			—			—
Construction	—				—				—				—			18,182			18,182			—			—
Consumer
Installment	10,883				2,866				1,446				15,195			1,065,103			1,080,298			—			954
Home Equity Lines	3,779				982				3,522				8,283			298,500			306,783			—			2,184
Residential Mortgages	18,347				3,204				10,724				32,275			434,319			466,594			2,719			737
Total	$	38,184			$	10,199			$	43,285			$	91,668		$	3,725,753		$	3,817,421		$	2,719		$	5,904
Covered Loans (b)																						≥ 90 Days
	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (c)			Loans (c)
Commercial
C&I	$	3,729			$	730			$	12,493			$	16,952		$	66,287		$	83,239		n/a			n/a
CRE	1,299				5,672				117,839				124,810			184,087			308,897			n/a			n/a
Construction	943				—				25,996				26,939			3,150			30,089			n/a			n/a
Consumer
Installment	57				4				—				61			6,300			6,361			n/a			n/a
Home Equity Lines	1,532				22				1,781				3,335			99,574			102,909			n/a			n/a
Residential Mortgages	8,333				661				5,966				14,960			37,835			52,795			n/a			n/a
Total	$	15,893			$	7,089			$	164,075			$	187,057		$	397,233		$	584,290		n/a			n/a
(a) Installment loans 90 days or more past due and accruing include $2.9 million of loans guaranteed by the U.S. government as of September 30, 2013.
(b) Excludes loss share receivable of $70.0 million as of September 30, 2013.
(c) Acquired and covered impaired loans were not classified as nonperforming assets at September 30, 2013 as the loans are considered to be performing under ASC 310-30. As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cash flows, is being recognized on all acquired and covered impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and covered impaired loans.
Individual commercial loans are assigned credit risk grades based on an internal assessment of conditions that affect a borrower’s ability to meet its contractual obligation under the loan agreement. The assessment process includes reviewing a borrower’s current financial information, historical payment experience, credit documentation, public information, and other information specific to each borrower. Commercial loans are reviewed on an annual, quarterly or rotational basis or as Management becomes aware of information during a borrower’s ability to fulfill its obligation. For consumer loans, Management evaluates credit quality based on the aging status of the loan as well as by payment activity, which is presented in the above tables.
The credit-risk grading process for commercial loans is summarized as follows:
“Pass” Loans (Grades 1, 2, 3, 4) are not considered a greater than normal credit risk. Generally, the borrowers have the apparent ability to satisfy obligations to the bank, and the Corporation anticipates insignificant uncollectible amounts based on its individual loan review.
“Special-Mention” Loans (Grade 5) are commercial loans that have identified potential weaknesses that deserve Management’s close attention. If left uncorrected, these potential weaknesses may result in noticeable deterioration of the repayment prospects for the asset or in the institution’s credit position.
“Substandard” Loans (Grade 6) are inadequately protected by the current financial condition and paying capacity of the obligor or by any collateral pledged. Loans so classified have a well-defined weakness or weaknesses that may jeopardize the liquidation of the debt pursuant to the contractual principal and interest terms. Such loans are characterized by the distinct possibility that the Corporation may sustain some loss if the deficiencies are not corrected.
“Doubtful” Loans (Grade 7) have all the weaknesses inherent in those classified as substandard, with the added characteristic that existing facts, conditions, and values make collection or liquidation in full highly improbable. Such loans are currently managed separately to determine the highest recovery alternatives.
“Loss” Loans (Grade 8) are considered uncollectible and of such little value that their continuance as bankable assets is not warranted. These loans are charged off when loss is identified.
The following tables provide a summary of commercial loans by portfolio type and the Corporation's internal credit quality rating:
As of September 30, 2014
(In thousands)
	Originated Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	42,653			$	695			$	—			$	8,929		$	52,277
Grade 2	214,307				3,523				—				12,525			230,355
Grade 3	1,164,149				285,652				36,953				58,157			1,544,911
Grade 4	3,458,074				1,761,138				420,721				258,880			5,898,813
Grade 5	119,252				29,410				9,359				1,233			159,254
Grade 6	40,885				39,316				79				212			80,492
Grade 7	—				—				—				—			—
Total	$	5,039,320			$	2,119,734			$	467,112			$	339,936		$	7,966,102
	Acquired Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	—			$	—			$	—			$	—		$	—
Grade 2	—				—				—				—			—
Grade 3	14,464				26,216				—				—			40,680
Grade 4	492,667				592,969				10,260				—			1,095,896
Grade 5	19,672				44,570				—				—			64,242
Grade 6	24,686				46,740				—				—			71,426
Grade 7	—				—				—				—			—
Total	$	551,489			$	710,495			$	10,260			$	—		$	1,272,244
	Covered Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	—			$	—			$	—			$	—		$	—
Grade 2	1,373				—				—				—			1,373
Grade 3	—				—				—				—			—
Grade 4	40,902				101,360				686				—			142,948
Grade 5	1,245				3,908				—				—			5,153
Grade 6	12,556				87,478				12,659				—			112,693
Grade 7	—				—				152				—			152
Total	$	56,076			$	192,746			$	13,497			$	—		$	262,319
As of December 31, 2013
(In thousands)
	Originated Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	34,909			$	241			$	—			$	9,271		$	44,421
Grade 2	108,709				3,730				—				2,900			115,339
Grade 3	802,624				315,150				25,632				54,446			1,197,852
Grade 4	3,083,458				1,759,383				306,795				167,022			5,316,658
Grade 5	71,857				34,969				267				5,750			112,843
Grade 6	38,010				56,314				6,231				162			100,717
Grade 7	—				—				—				—			—
Total	$	4,139,567			$	2,169,787			$	338,925			$	239,551		$	6,887,830
	Acquired Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	—			$	—			$	—			$	—		$	—
Grade 2	1,741				703				—				—			2,444
Grade 3	79,634				29,224				—				—			108,858
Grade 4	643,495				722,307				13,246				—			1,379,048
Grade 5	46,807				93,499				—				—			140,306
Grade 6	22,402				72,912				—				—			95,314
Grade 7	—				—				—				—			—
Total	$	794,079			$	918,645			$	13,246			$	—		$	1,725,970
	Covered Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	—			$	—			$	—			$	—		$	—
Grade 2	968				—				—				—			968
Grade 3	—				—				—				—			—
Grade 4	41,115				113,863				601				—			155,579
Grade 5	427				6,219				—				—			6,646
Grade 6	31,621				153,318				23,208				—			208,147
Grade 7	2,106				194				2,220				—			4,520
Total	$	76,237			$	273,594			$	26,029			$	—		$	375,860
As of September 30, 2013
(In thousands)
	Originated Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	32,144			$	1,216			$	—			$	9,932		$	43,292
Grade 2	82,906				3,711				—				3,173			89,790
Grade 3	867,186				368,918				27,041				29,631			1,292,776
Grade 4	2,796,101				1,770,768				300,154				152,778			5,019,801
Grade 5	48,912				30,502				323				3,325			83,062
Grade 6	36,846				52,297				1,344				1,068			91,555
Grade 7	—				—				—				—			—
Total	$	3,864,095			$	2,227,412			$	328,862			$	199,907		$	6,620,276
Acquired Loans
	Acquired Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	—			$	—			$	—			$	—		$	—
Grade 2	96				—				—				—			96
Grade 3	27,827				29,123				—				—			56,950
Grade 4	849,858				744,362				18,182				—			1,612,402
Grade 5	55,558				102,256				—				—			157,814
Grade 6	44,322				92,162				—				—			136,484
Grade 7	—				—				—				—			—
Total	$	977,661			$	967,903			$	18,182			$	—		$	1,963,746
	Covered Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	—			$	—			$	—			$	—		$	—
Grade 2	996				—				—				—			996
Grade 3	—				—				—				—			—
Grade 4	45,557				116,056				601				—			162,214
Grade 5	624				15,364				943				—			16,931
Grade 6	33,957				176,286				26,401				—			236,644
Grade 7	2,105				1,191				2,144				—			5,440
Total	$	83,239			$	308,897			$	30,089			$	—		$	422,225

Allowance_for_Loan_Losses_Note

Allowance for Loan Losses (Notes)	9 Months Ended
	Sep. 30, 2014
Allowance for loan losses [Abstract]	'
Allowance for Credit Losses	'
	Allowance for Loan Losses
	The Corporation's Credit Policy Division manages credit risk by establishing common credit policies for its subsidiary bank, participating in approval of its loans, conducting reviews of loan portfolios, providing centralized consumer underwriting, collections and loan operation services, and overseeing loan workouts. The Corporation's objective is to minimize losses from its commercial lending activities and to maintain consumer losses at acceptable levels that are stable and consistent with growth and profitability objectives.
	The ALL is Management's estimate of the amount of probable credit losses inherent in a loan portfolio at the balance sheet date. The following describes the distinctions in methodology used to estimate the ALL of originated, acquired and covered loan portfolios as well as certain significant accounting policies relevant to each category.
	Allowance for Originated Loan Losses
	Management estimates credit losses based on originated individual loans determined to be impaired and on all other loans grouped based on similar risk characteristics. Management also considers internal and external factors such as economic conditions, loan management practices, portfolio monitoring, and other risks, collectively known as qualitative factors, or Q-factors, to estimate credit losses in the loan portfolio. Q-factors are used to reflect changes in the portfolio's collectability characteristics not captured by historical loss data.
	The Corporation's historical loss component is the most significant of the ALL components and is based on historical loss experience by credit-risk grade (for commercial loan pools) and payment status (for mortgage and consumer loan pools). The historical loss experience component of the ALL represents the results of migration analysis of historical net charge-offs for portfolios of loans (including groups of commercial loans within each credit-risk grade and groups of consumer loans by payment status). For measuring loss exposure in a pool of loans, the historical net charge-off or migration experience is utilized to estimate expected losses to be realized from the pool of loans.
	If a nonperforming, substandard loan has an outstanding balance of $0.3 million or greater or if a doubtful loan has an outstanding balance of $0.1 million or greater, as determined by the Corporation's credit-risk grading process, further analysis is performed to determine the probable loss content and assign a specific allowance to the loan, if deemed appropriate. The ALL relating to originated loans that have become impaired is based on either expected cash flows discounted using the original effective interest rate, the observable market price, or the fair value of the collateral for certain collateral dependent loans.
	Loans are generally written off when deemed uncollectible or when they reach a predetermined number of days past due depending upon loan product, terms, and other factors.
	The following tables show activity in the originated ALL, by portfolio segment for the three and nine months ended September 30, 2014 and 2013, as well as the corresponding recorded investment in originated loans at the end of the period:
	As of September 30, 2014
	(In thousands)
	Originated Loans		C&I				CRE				Construction				Leases				Installment				Home Equity Lines				Credit Cards				Residential Mortgages			Total
	Three Months Ended
	Allowance for originated loan losses, beginning balance		$	43,256			$	8,730			$	1,323			$	1,028			$	12,243			$	13,903			$	7,328			$	4,139		$	91,950
	Charge-offs		(3,569		)		(570		)		—				—				(5,041		)		(1,361		)		(778		)		(91		)	(11,410		)
	Recoveries		1,262				43				5				2				2,944				708				403				114			5,481
	Provision for loan losses		(3,824		)		243				170				(294		)		3,514				4,648				559				(154		)	4,862
	Allowance for originated loan losses, ending balance		$	37,125			$	8,446			$	1,498			$	736			$	13,660			$	17,898			$	7,512			$	4,008		$	90,883
	Nine Months Ended
	Allowance for originated loan losses, beginning balance		$	42,981			$	12,265			$	2,810			$	1,081			$	11,935			$	12,900			$	7,740			$	4,772		$	96,484
	Charge-offs		(9,203		)		(3,345		)		—				—				(14,739		)		(3,403		)		(3,544		)		(1,484		)	(35,718		)
	Recoveries		2,681				77				35				374				8,735				2,227				1,260				219			15,608
	Provision for loan losses		666				(551		)		(1,347		)		(719		)		7,729				6,174				2,056				501			14,509
	Allowance for originated loan losses, ending balance		$	37,125			$	8,446			$	1,498			$	736			$	13,660			$	17,898			$	7,512			$	4,008		$	90,883
	Ending allowance for originated loan losses balance attributable to loans:
		Individually evaluated for impairment	$	1,399			$	1,620			$	—			$	—			$	1,086			$	190			$	322			$	1,435		$	6,052
		Collectively evaluated for impairment	35,726				6,826				1,498				736				12,574				17,708				7,190				2,573			84,831
	Total ending allowance for originated loan losses balance		$	37,125			$	8,446			$	1,498			$	736			$	13,660			$	17,898			$	7,512			$	4,008		$	90,883
	Originated loans:
		Originated loans individually evaluated for impairment	$	11,155			$	22,597			$	—			$	—			$	23,575			$	7,624			$	912			$	26,108		$	91,971
		Originated loans collectively evaluated for impairment	5,028,165				2,097,137				467,112				339,936				2,253,958				1,054,389				159,201				579,890			11,979,788
	Total ending originated loan balance		$	5,039,320			$	2,119,734			$	467,112			$	339,936			$	2,277,533			$	1,062,013			$	160,113			$	605,998		$	12,071,759
	As of September 30, 2013
	(In thousands)
	Originated Loans		C&I				CRE				Construction				Leases				Installment				Home Equity Lines				Credit Cards				Residential Mortgages			Total
	Three Months Ended
	Allowance for originated loan losses, beginning balance		$	45,167			$	16,823			$	2,044			$	909			$	8,725			$	13,266			$	7,288			$	4,423		$	98,645
	Charge-offs		(1,011		)		(211		)		—				—				(3,582		)		(1,843		)		(1,367		)		(501		)	(8,515		)
	Recoveries		1,162				168				394				11				2,624				802				438				39			5,638
	Provision for loan losses		(2,140		)		(1,632		)		267				99				2,710				662				1,147				1,410			2,523
	Allowance for originated loan losses, ending balance		$	43,178			$	15,148			$	2,705			$	1,019			$	10,477			$	12,887			$	7,506			$	5,371		$	98,291
	Nine Months Ended
	Allowance for originated loan losses, beginning balance		$	36,209			$	20,126			$	3,821			$	639			$	11,154			$	13,724			$	7,384			$	5,885		$	98,942
	Charge-offs		(5,114		)		(1,014		)		(516		)		(1,237		)		(11,788		)		(5,177		)		(4,229		)		(1,185		)	(30,260		)
	Recoveries		5,745				503				483				100				7,859				1,884				1,420				133			18,127
	Provision for loan losses		6,338				(4,467		)		(1,083		)		1,517				3,252				2,456				2,931				538			11,482
	Allowance for originated loan losses, ending balance		$	43,178			$	15,148			$	2,705			$	1,019			$	10,477			$	12,887			$	7,506			$	5,371		$	98,291
	Ending allowance for originated loan losses balance attributable to loans:
		Individually evaluated for impairment	$	1,336			$	488			$	—			$	—			$	552			$	197			$	261			$	1,302		$	4,136
		Collectively evaluated for impairment	41,842				14,660				2,705				1,019				9,925				12,690				7,245				4,069			94,155
	Total ending allowance for originated loan losses balance		$	43,178			$	15,148			$	2,705			$	1,019			$	10,477			$	12,887			$	7,506			$	5,371		$	98,291
	Originated loans:
		Originated loans individually evaluated for impairment	$	7,476			$	19,755			$	958			$	—			$	30,608			$	6,787			$	1,253			$	23,064		$	89,901
		Originated loans collectively evaluated for impairment	3,856,619				2,207,657				327,904				199,907				1,616,487				882,585				143,860				464,219			9,699,238
	Total ending originated loan balance		$	3,864,095			$	2,227,412			$	328,862			$	199,907			$	1,647,095			$	889,372			$	145,113			$	487,283		$	9,789,139
	The following table presents the originated ALL and the recorded investment as of December 31, 2013:
	As of December 31, 2013
		(In thousands)
		Originated Loans	C&I				CRE				Construction				Leases				Installment				Home Equity Lines				Credit Cards				Residential Mortgages			Total
	Ending allowance for originated loan losses balance attributable to loans:
		Individually evaluated for impairment	$	3,235			$	229			$	—			$	—			$	1,014			$	223			$	312			$	1,133		$	6,146
		Collectively evaluated for impairment	39,746				12,036				2,810				1,081				10,921				12,677				7,428				3,639			90,338
	Total ending allowance for originated loan losses balance		$	42,981			$	12,265			$	2,810			$	1,081			$	11,935			$	12,900			$	7,740			$	4,772		$	96,484
Originated loans:
	Loans individually evaluated for impairment	$	8,053			$	20,616			$	906			$	—			$	27,285			$	6,726			$	1,112			$	23,066		$	87,764
	Loans collectively evaluated for impairment	4,131,514				2,149,171				338,019				239,551				1,700,640				913,340				147,201				506,187			10,125,623
Total ending originated loan balance		$	4,139,567			$	2,169,787			$	338,925			$	239,551			$	1,727,925			$	920,066			$	148,313			$	529,253		$	10,213,387
Allowance for Acquired Loan Losses
In accordance with the acquisition method of accounting, the Citizens' loans were recorded at their fair value as of the Acquisition Date and the prior ALL was eliminated. An ALL for acquired nonimpaired loans is estimated using a methodology similar to that used for originated loans, that is, based on a specific reserve analysis for loans individually evaluated for impairment and based on historical loss rates for loans collectively evaluated for impairment. If the computed ALL is greater than the remaining fair value discount, the excess is added to the ALL through a provision for loan losses. If the computed ALL is less, no additional ALL is recognized. As of September 30, 2014, the computed ALL was less than the remaining fair value discount; therefore, no ALL for acquired nonimpaired loans was recorded.
Charge-offs and actual losses on an acquired nonimpaired loan first reduce any remaining fair value discount for that loan. Once a loan's discount is depleted, charge-offs and actual losses are applied against the acquired ALL. During the three and nine months ended September 30, 2014, provision for loan losses, equal to net charge-offs, of $3.2 million and $12.6 million, respectively, were recorded. Charge-offs on acquired nonimpaired loans were mainly related to consumer loans that were written off in accordance with the Corporation's credit policies based on a predetermined number of days past due.
The ALL for acquired impaired loans is determined by comparing the present value of the cash flows expected to be collected to the carrying amount for a given pool of loans. Management reforecasts the estimated cash flows expected to be collected on acquired impaired loans on a quarterly basis. If the present value of expected cash flows for a pool is less than its carrying value, impairment is recognized in the current period by an increase in the acquired ALL and a charge to the provision for loan losses. If the present value of expected cash flows for a pool is greater than its carrying value, any previously established acquired ALL is reversed and any remaining difference increases the accretable yield which will be taken into interest income over the remaining life of the loan pool. See Note 3 (Loans) for further information on changes in accretable yield.
The following table presents activity in the allowance for acquired impaired loan losses for the three and nine months ended September 30, 2014. There was no allowance for acquired impaired loans as of September 30, 2013.
Allowance for Acquired Impaired Loan Losses	Three Months Ended September 30,			Nine Months Ended September 30,
(In thousands)	2014			2014
Balance at beginning of the period	$	4,977		$	741
Charge-offs	—			—
Recoveries	—			—
Provision for loan losses	1,229			5,465
Balance at end of the period	$	6,206		$	6,206
Allowance for Covered Loan Losses
The ALL on covered loans is estimated similar to acquired loans as described above except any increase to the ALL and provision for loan losses is partially offset by an increase in the loss share receivable for the portion of the losses recoverable under the loss sharing agreements with the FDIC. Additionally, the Corporation elected to account for all covered loans as impaired except for those loans acquired with revolving privileges, which are outside the scope of impaired loan accounting, and, therefore, are accounted for as covered nonimpaired loans. As of September 30, 2014, the computed ALL was less than the remaining fair value discount, therefore, no ALL for covered nonimpaired loans was recorded.
The following table presents activity in the allowance for covered impaired loan losses for the three and nine months ended September 30, 2014 and 2013:
Allowance for Covered Impaired Loan Losses		Three Months Ended September 30,								Nine Months Ended September 30,
(In thousands)		2014				2013				2014				2013
Balance at beginning of the period		$	45,109			$	49,069			$	44,027			$	43,255
	Net provision/(recapture) of loan losses before benefit attributable to FDIC loss share agreements	2,827				2,855				10,255				19,009
	Net (benefit)/recapture attributable to FDIC loss share agreements	(2,908		)		(1,032		)		(3,835		)		(8,890		)
Net provision/(recapture) for loan losses		(81		)		1,823				6,420				10,119
Increase (decrease) in loss share receivable		2,908				1,032				3,835				8,890
Loans charged-off		(4,948		)		(6,380		)		(11,294		)		(16,720		)
Balance at end of the period		$	42,988			$	45,544			$	42,988			$	45,544
During the three months ended September 30, 2014, $2.8 million of losses on covered impaired loans were recognized with an offsetting increase of $2.9 million in the loss share receivable. This net recapture of $0.1 million compares to a net provision of $1.8 million in the three months ended September 30, 2013. During the nine months ended September 30, 2014, $10.3 million of provision on covered impaired loans was recognized with an offsetting increase of $3.8 million in the loss share receivable. This net provision of $6.4 million compares to $10.1 million in the nine months ended September 30, 2013.
An acquired or covered loan may be resolved either through receipt of payment (in full or in part) from the borrower, the sale of the loan to a third party, or foreclosure of the collateral. In the period of resolution of a nonimpaired loan, any remaining unamortized fair value adjustment is recognized as interest income. In the period of resolution of an impaired loan accounted for on an individual basis, the difference between the carrying amount of the loan and the proceeds received is recognized as a gain or loss within noninterest income. The majority of impaired loans are accounted for within a pool of loans which results in any difference between the proceeds received and the loan carrying amount being deferred as part of the carrying amount of the pool. The accretable amount of the pool remains unaffected from the resolution until the subsequent quarterly cash flow re-estimation. Favorable results from removal of the resolved loan from the pool increase the future accretable yield of the pool, while unfavorable results are recorded as impairment in the quarter of the cash flow re-estimation. Acquired or covered impaired loans subject to modification are not removed from a pool even if those loans would otherwise be deemed TDRs as the pool, and not the individual loan, represents the unit of account.
Credit Quality
A loan is considered to be impaired when, based on current events or information, it is probable the Corporation will be unable to collect all amounts due (principal and interest) per the contractual terms of the loan agreement.
Interest income recognized on impaired loans was $0.2 million and $0.4 million for the three months and nine months ended September 30, 2014, respectively, compared to $0.1 million and $0.3 million for the three months and nine months ended September 30, 2013, respectively. Interest income which would have been earned in accordance with the original terms was $0.7 million and $2.0 million for the three months and nine months ended September 30, 2014, respectively, compared to $0.6 million and $2.4 million for the three months and nine months ended September 30, 2013, respectively.
Loan impairment is measured based on either the present value of expected future cash flows discounted at the loan's effective interest rate, at the observable market price of the loan, or the fair value of the collateral for certain collateral dependent loans. Impaired loans include all nonaccrual commercial, agricultural, construction, and commercial real estate loans, and loans modified as a TDR, regardless of nonperforming status. Acquired and covered impaired loans are not considered or reported as impaired loans. Nonimpaired acquired loans that are subsequently placed on nonaccrual status are reported as impaired loans and included in the tables below. Acquired loans restructured after acquisition are not considered or reported as TDRs if the loans evidenced credit deterioration as of the date of acquisition and are accounted for in pools.
The following tables provide further detail on impaired loans individually evaluated for impairment and the associated ALL. Certain impaired loans do not have a related ALL as the valuation of these impaired loans exceeded the recorded investment.
As of September 30, 2014
Originated Loans						Unpaid								Average
		Recorded				Principal				Related				Recorded
(In thousands)		Investment				Balance				Allowance				Investment
Impaired loans with no related allowance
Commercial
	C&I	$	8,411			$	15,740			$	—			$	12,484
	CRE	16,576				22,625				—				17,035
	Construction	—				—				—				—
Consumer
	Installment	3,899				4,001				—				3,959
	Home equity line	2,015				2,045				—				2,073
	Credit card	27				27				—				44
	Residential mortgages	12,576				15,552				—				12,720
Subtotal		43,504				59,990				—				48,315
Impaired loans with a related allowance
Commercial
	C&I	2,744				2,798				1,399				2,896
	CRE	6,021				6,022				1,620				3,381
	Construction	—				—				—				—
Consumer
	Installment	19,676				20,314				1,086				20,039
	Home equity line	5,609				5,829				190				5,779
	Credit card	885				885				322				981
	Residential mortgages	13,532				13,641				1,435				13,566
Subtotal		48,467				49,489				6,052				46,642
	Total impaired loans	$	91,971			$	109,479			$	6,052			$	94,957
Note 1: These tables exclude loans fully charged off.
Note 2: The differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.
As of December 31, 2013
Originated Loans						Unpaid								Average
		Recorded				Principal				Related				Recorded
(In thousands)		Investment				Balance				Allowance				Investment
Impaired loans with no related allowance
Commercial
	C&I	$	2,503			$	6,679			$	—			$	7,256
	CRE	17,871				23,709				—				18,639
	Construction	906				1,179				—				1,035
Consumer
	Installment	2,813				3,978				—				3,338
	Home equity line	1,018				1,347				—				1,079
	Credit card	49				49				—				91
	Residential mortgages	10,250				12,778				—				10,258
Subtotal		35,410				49,719				—				41,696
Impaired loans with a related allowance
Commercial
	C&I	5,551				7,428				3,235				5,009
	CRE	2,744				2,870				229				2,836
	Construction	—				—				—				—
Consumer
	Installment	24,472				24,558				1,014				24,985
	Home equity line	5,707				5,707				223				5,874
	Credit card	1,064				1,064				312				1,238
	Residential mortgages	12,816				12,898				1,133				12,064
Subtotal		52,354				54,525				6,146				52,006
	Total impaired loans	$	87,764			$	104,244			$	6,146			$	93,702
Note 1: These tables exclude loans fully charged off.
Note 2: The differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.
As of September 30, 2013
Originated Loans						Unpaid								Average
		Recorded				Principal				Related				Recorded
(In thousands)		Investment				Balance				Allowance				Investment
Impaired loans with no related allowance
Commercial
	C&I	$	3,826			$	7,887			$	—			$	11,842
	CRE	15,836				21,921				—				18,884
	Construction	958				1,237				—				1,851
Consumer
	Installment	3,051				4,344				—				3,521
	Home equity line	1,046				1,386				—				1,107
	Credit card	48				48				—				74
	Residential mortgages	10,363				12,899				—				10,122
Subtotal		35,128				49,722				—				47,401
Impaired loans with a related allowance
Commercial
	C&I	3,650				5,526				1,336				3,829
	CRE	3,920				4,251				488				4,126
	Construction	—				—				—				—
Consumer
	Installment	25,528				25,616				552				26,172
	Home equity line	5,869				5,869				197				6,017
	Credit card	1,205				1,205				261				1,352
	Residential mortgages	12,702				12,784				1,302				11,866
Subtotal		52,874				55,251				4,136				53,362
	Total impaired loans	$	88,002			$	104,973			$	4,136			$	100,763
Note 1: These tables exclude loans fully charged off.
Note 2: The differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.
Troubled Debt Restructurings
In certain circumstances, the Corporation may modify the terms of a loan to maximize the collection of amounts due when a borrower is experiencing financial difficulties or is expected to experience difficulties in the near term. In most cases the modification is either a concessionary reduction in interest rate, extension of the maturity date or modification of the adjustable rate provisions of the loan that would otherwise not be considered; however, forgiveness of principal is rarely granted. Concessionary modifications are classified as TDRs unless the modification is short-term, typically less than 90 days. TDRs accrue interest if the borrower complies with the revised terms and conditions and has demonstrated repayment performance at a level commensurate with the modified terms for a minimum of six consecutive payment cycles after the restructuring date. Acquired loans restructured after acquisition are not considered TDRs if the loans evidenced credit deterioration as of the Acquisition Date and are accounted for in pools.
The substantial majority of the Corporation's residential mortgage TDRs involve reducing the client's loan payment through an interest rate reduction for a set period of time based on the borrower's ability to service the modified loan payment. Modifications of mortgages retained in portfolio are handled using proprietary modification guidelines, or the FDIC's Modification Program for residential first mortgages covered by loss share agreements (agreements between the Bank and the FDIC that afford the Bank significant protection against future losses). The Corporation participates in the U.S. Treasury's Home Affordable Modification Program for originated mortgages sold to and serviced for FNMA and FHLMC.
Commercial and industrial loans modified in a TDR often involve temporary interest-only payments, term extensions and converting revolving credit lines to term loans. Additional collateral, a co-borrower, or a guarantor is often requested. Commercial real estate and construction loans modified in a TDR often involve reducing the interest rate for the remaining term of the loan, extending the maturity date at an interest rate lower than the current market rate for new debt with similar risk, or substituting or adding a new borrower or guarantor. Construction loans modified in a TDR may also involve extending the interest-only payment period. The Corporation has modified certain loans according to provisions in loss share agreements. Losses associated with modifications on these loans, including the economic impact of interest rate reductions, are generally eligible for reimbursement under the loss share agreements.
The following tables provide the number of loans modified in a TDR and the recorded investment and unpaid principal balance by loan portfolio as of September 30, 2014, December 31, 2013, and September 30, 2013.
			As of September 30, 2014
(Dollars in thousands)			Number of Loans			Recorded Investment				Unpaid Principal Balance
Originated loans
	Commercial
		C&I	39			$	2,673			$	10,032
		CRE	63			18,087				22,905
		Construction	31			—				—
		Total originated commercial	133			20,760				32,937
	Consumer
		Installment	1,238			23,575				24,315
		Home equity lines	275			7,624				7,874
		Credit card	244			912				912
		Residential mortgages	325			26,108				29,193
		Total originated consumer	2,082			58,219				62,294
Total originated loans			2,215			$	78,979			$	95,231
Acquired loans
	Commercial
		C&I	1			$	3			$	3
		CRE	2			2,336				2,336
		Total acquired commercial	3			2,339				2,339
	Consumer
		Installment	37			960				1,021
		Home equity lines	121			5,995				6,041
		Residential mortgages	24			1,610				1,836
		Total acquired consumer	182			8,565				8,898
Total acquired loans			185			$	10,904			$	11,237
Covered loans
	Commercial
		C&I	6			$	177			$	1,620
		CRE	24			35,904				51,067
		Construction	10			650				10,899
		Total covered commercial	40			36,731				63,586
	Consumer
		Home equity lines	62			8,458				8,458
		Residential mortgages	2			336				336
		Total covered consumer	64			8,794				8,794
Total covered loans			104			$	45,525			$	72,380
Total loans
	Commercial
		C&I	46			$	2,853			$	11,655
		CRE	89			56,327				76,308
		Construction	41			650				10,899
		Total commercial	176			59,830				98,862
	Consumer
		Installment	1,275			24,535				25,336
		Home equity lines	458			22,077				22,373
		Credit card	244			912				912
		Residential mortgages	351			28,054				31,365
		Total consumer	2,328			75,578				79,986
Total loans			2,504			$	135,408			$	178,848
Note 1: The differences between the recorded investment and unpaid principal balance amounts represents partial charge offs.
			As of December 31, 2013
(Dollars in thousands)			Number of Loans			Recorded Investment				Unpaid Principal Balance
Originated loans
	Commercial
		C&I	35			$	4,449			$	7,660
		CRE	52			15,932				20,569
		Construction	30			905				1,179
		Total originated commercial	117			21,286				29,408
	Consumer
		Installment	1,553			27,285				28,536
		Home equity lines	231			6,725				7,054
		Credit card	307			1,113				1,113
		Residential mortgages	301			23,067				25,676
		Total originated consumer	2,392			58,190				62,379
Total originated loans			2,509			$	79,476			$	91,787
Acquired loans
	Commercial
		C&I	1			6				5
		CRE	1			1,730				1,730
		Total acquired commercial	2			1,736				1,735
	Consumer
		Installment	12			505				542
		Home equity lines	8			245				270
		Residential mortgages	7			431				502
		Total acquired consumer	27			1,181				1,314
Total acquired loans			29			$	2,917			$	3,049
Covered loans
	Commercial
		C&I	4			$	1,104			$	2,331
		CRE	24			39,995				57,008
		Construction	10			4,144				24,547
		Total covered commercial	38			45,243				83,886
	Consumer
		Home equity lines	47			5,401				5,421
		Residential Mortgages	1			150				150
		Total covered consumer	48			5,551				5,571
Total covered loans			86			$	50,794			$	89,457
Total loans
	Commercial
		C&I	40			$	5,559			$	9,996
		CRE	77			57,657				79,307
		Construction	40			5,049				25,726
		Total commercial	157			68,265				115,029
	Consumer
		Installment	1,565			27,790				29,078
		Home equity lines	286			12,371				12,745
		Credit card	307			1,113				1,113
		Residential mortgages	309			23,648				26,328
		Total consumer	2,467			64,922				69,264
Total loans			2,624			$	133,187			$	184,293
Note 1: The differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.
			As of September 30, 2013
(Dollars in thousands)			Number of Loans			Recorded Investment				Unpaid Principal Balance
Originated loans
	Commercial
		C&I	35			$	5,455			$	9,533
		CRE	49			15,508				19,848
		Construction	31			958				1,237
		Total originated commercial	115			21,921				30,618
	Consumer
		Installment	1,655			28,578				29,960
		Home equity lines	240			6,916				7,255
		Credit card	339			1,253				1,253
		Residential mortgages	292			23,065				25,683
		Total originated consumer	2,526			59,812				64,151
Total originated loans			2,641			$	81,733			$	94,769
Acquired loans
	Commercial
		C&I	1			6				6
		Total acquired commercial	1			6				6
	Consumer
		Home equity lines	3			260				307
		Total acquired consumer	3			260				307
Total acquired loans			4			$	266			$	313
Covered loans
	Commercial
		C&I	4			$	1,537			$	2,377
		CRE	24			43,024				58,252
		Construction	10			4,040				23,796
		Total covered commercial	38			48,601				84,425
	Consumer
		Home equity lines	48			5,753				5,777
		Residential mortgages	1			152				151
		Total covered consumer	49			5,905				5,928
Total covered loans			87			$	54,506			$	90,353
Total loans
	Commercial
		C&I	40			$	6,998			$	11,916
		CRE	73			58,532				78,100
		Construction	41			4,998				25,033
		Total commercial	154			70,528				115,049
	Consumer
		Installment	1,655			28,578				29,960
		Home equity lines	291			12,929				13,339
		Credit card	339			1,253				1,253
		Residential mortgages	293			23,217				25,834
		Total consumer	2,578			65,977				70,386
Total loans			2,732			$	136,505			$	185,435
Note 1: The differences between the recorded investment and unpaid principal balance amounts represents partial charge offs.
The pre-modification and post-modification outstanding recorded investments of loans modified as TDRs during the three and nine months ended September 30, 2014 and 2013 were not materially different. Post-modification balances may include capitalization of unpaid accrued interest and fees associated with the modification as well as forgiveness of principal. Loans modified as TDRs during the three and nine months ended September 30, 2014 and 2013 did not involve the forgiveness of principal; accordingly, the Corporation did not record a charge-off at the modification date. Additionally, capitalization of any unpaid accrued interest and fees assessed to loans modified in the three and nine months ended September 30, 2014 and 2013 were not material to the accompanying consolidated financial statements. Specific allowances for loan losses are established for loans whose terms have been modified in a TDR. Specific reserve allocations are generally assessed prior to loans being modified in a TDR, as most of these loans migrate from the Corporation's internal watch list and have been specifically allocated for as part of the Corporation's normal loan loss provisioning methodology. At September 30, 2014, the Corporation had $0.5 million in commitments to lend additional funds to debtors owing receivables whose terms have been modified in a TDR.
The following tables provide a summary of the delinquency status of TDRs along with the specific allowance for loan loss, by loan type, as of September 30, 2014, December 31, 2013, and September 30, 2013, including TDRs that continue to accrue interest and TDRs included in nonperforming assets.
As of September 30, 2014
	Accruing TDRs												Nonaccruing TDRs												Total				Total
(In thousands)	Current				Delinquent				Total				Current				Delinquent				Total				TDRs				Allowance
Originated loans
Commercial
C&I	$	594			$	—			$	594			$	116			$	1,963			$	2,079			$	2,673			$	653
CRE	14,350				—				14,350				1,562				2,175				3,737				18,087				70
Construction	—				—				—				—				—				—				—				—
Total originated commercial	14,944				—				14,944				1,678				4,138				5,816				20,760				723
Consumer
Installment	21,046				533				21,579				1,847				149				1,996				23,575				1,086
Home equity lines	6,479				180				6,659				915				50				965				7,624				190
Credit card	800				97				897				—				15				15				912				322
Residential mortgages	14,228				3,384				17,612				5,113				3,383				8,496				26,108				1,435
Total originated consumer	42,553				4,194				46,747				7,875				3,597				11,472				58,219				3,033
Total originated TDRs	$	57,497			$	4,194			$	61,691			$	9,553			$	7,735			$	17,288			$	78,979			$	3,756
Acquired loans
Commercial
C&I	—				—				—				3				—				3				3				3
CRE	1,627				—				1,627				709				—				709				2,336				148
Total acquired commercial	1,627				—				1,627				712				—				712				2,339				151
Consumer
Installment	842				75				917				25				18				43				960				137
Home equity lines	5,764				89				5,853				142				—				142				5,995				—
Residential mortgages	824				—				824				737				49				786				1,610				14
Total acquired consumer	7,430				164				7,594				904				67				971				8,565				151
Total acquired TDRs	$	9,057			$	164			$	9,221			$	1,616			$	67			$	1,683			$	10,904			$	302
Covered loans
Commercial
C&I	$	—			$	177			$	177			$	—			$	—			$	—			$	177			$	—
CRE	5,729				30,175				35,904				—				—				—				35,904				2,949
Construction	650				—				650				—				—				—				650				55
Total covered commercial	6,379				30,352				36,731				—				—				—				36,731				3,004
Consumer
Home equity lines	7,498				624				8,122				336				—				336				8,458				—
Residential mortgages	336				—				336				—				—				—				336				26
Total covered consumer	7,834				624				8,458				336				—				336				8,794				26
Total covered TDRs	$	14,213			$	30,976			$	45,189			$	336			$	—			$	336			$	45,525			$	3,030
Total loans
Commercial
C&I	$	594			$	177			$	771			$	119			$	1,963			$	2,082			$	2,853			$	656
CRE	21,706				30,175				51,881				2,271				2,175				4,446				56,327				3,167
Construction	650				—				650				—				—				—				650				55
Total commercial	22,950				30,352				53,302				2,390				4,138				6,528				59,830				3,878
Consumer
Installment	21,888				608				22,496				1,872				167				2,039				24,535				1,223
Home equity lines	19,741				893				20,634				1,393				50				1,443				22,077				190
Credit card	800				97				897				—				15				15				912				322
Residential mortgages	15,388				3,384				18,772				5,850				3,432				9,282				28,054				1,475
Total consumer	57,817				4,982				62,799				9,115				3,664				12,779				75,578				3,210
Total TDRs	$	80,767			$	35,334			$	116,101			$	11,505			$	7,802			$	19,307			$	135,408			$	7,088
As of December 31, 2013
	Accruing TDRs												Nonaccruing TDRs												Total				Total
(In thousands)	Current				Delinquent				Total				Current				Delinquent				Total				TDRs				Allowance
Originated loans
Commercial
C&I	$	1,438			$	879			$	2,317			$	177			$	1,955			$	2,132			$	4,449			$	665
CRE	10,442				382				10,824				1,208				3,900				5,108				15,932				32
Construction	848				—				848				—				57				57				905				—
Total originated commercial	12,728				1,261				13,989				1,385				5,912				7,297				21,286				697
Consumer
Installment	23,342				1,238				24,580				2,483				222				2,705				27,285				1,014
Home equity lines	5,313				194				5,507				1,206				12				1,218				6,725				223
Credit card	1,046				66				1,112				—				1				1				1,113				312
Residential mortgages	12,276				3,327				15,603				4,360				3,104				7,464				23,067				1,133
Total originated consumer	41,977				4,825				46,802				8,049				3,339				11,388				58,190				2,682
Total originated TDRs	$	54,705			$	6,086			$	60,791			$	9,434			$	9,251			$	18,685			$	79,476			$	3,379
Acquired loans
Commercial
C&I	$	—			$	—			$	—			$	6			$	—			$	6			$	6			$	—
CRE	1,730				—				1,730				—				—				—				1,730				—
Total acquired commercial	1,730				—				1,730				6				—				6				1,736				—
Consumer
Installment	369				136				505				—				—				—				505				—
Home equity lines	182				—				182				63				—				63				245				—
Residential mortgages	245				—				245				32				154				186				431				—
Total acquired consumer	796				136				932				95				154				249				1,181				—
Total acquired TDRs	$	2,526			$	136			$	2,662			$	101			$	154			$	255			$	2,917			$	—
Covered loans
Commercial
C&I	$	362			$	742			$	1,104			$	—			$	—			$	—			$	1,104			$	—
CRE	5,259				34,736				39,995				—				—				—				39,995				3,022
Construction	698				3,446				4,144				—				—				—				4,144				800
Total covered commercial	6,319				38,924				45,243				—				—				—				45,243				3,822
Consumer
Home equity lines	5,377				24				5,401				—				—				—				5,401				—
Residential mortgages	150				—				150				—				—				—				150				—
Total covered consumer	5,527				24				5,551				—				—				—				5,551				—
Total covered TDRs	$	11,846			$	38,948			$	50,794			$	—			$	—			$	—			$	50,794			$	3,822
Commercial
C&I	$	1,800			$	1,621			$	3,421			$	183			$	1,955			$	2,138			$	5,559			$	665
CRE	17,431				35,118				52,549				1,208				3,900				5,108				57,657				3,054
Construction	1,546				3,446				4,992				—				57				57				5,049				800
Total commercial	20,777				40,185				60,962				1,391				5,912				7,303				68,265				4,519
Consumer
Installment	23,711				1,374				25,085				2,483				222				2,705				27,790				1,014
Home equity lines	10,872				218				11,090				1,269				12				1,281				12,371				223
Credit card	1,046				66				1,112				—				1				1				1,113				312
Residential mortgages	12,671				3,327				15,998				4,392				3,258				7,650				23,648				1,133
Total consumer	48,300				4,985				53,285				8,144				3,493				11,637				64,922				2,682
Total TDRs	$	69,077			$	45,170			$	114,247			$	9,535			$	9,405			$	18,940			$	133,187			$	7,201
As of September 30, 2013
	Accruing TDRs												Nonaccruing TDRs												Total				Total
(In thousands)	Current				Delinquent				Total				Current				Delinquent				Total				TDRs				Allowance
Originated loans
Commercial
C&I	$	3,249			$	180			$	3,429			$	395			$	1,631			$	2,026			$	5,455			$	736
CRE	10,333				347				10,680				1,976				2,852				4,828				15,508				294
Construction	895				—				895				63				—				63				958				—
Total originated commercial	14,477				527				15,004				2,434				4,483				6,917				21,921				1,030
Consumer
Installment	24,194				1,261				25,455				2,803				320				3,123				28,578				552
Home equity lines	5,544				112				5,656				1,260				—				1,260				6,916				197
Credit card	1,134				117				1,251				—				2				2				1,253				261
Residential mortgages	12,566				3,094				15,660				4,046				3,359				7,405				23,065				1,302
Total originated consumer	43,438				4,584				48,022				8,109				3,681				11,790				59,812				2,312
Total originated TDRs	$	57,915			$	5,111			$	63,026			$	10,543			$	8,164			$	18,707			$	81,733			$	3,342
Acquired loans
Commercial
C&I	$	—			$	—			$	—			$	—			$	6			$	6			$	6			$	—
Total acquired commercial	—				—				—				—				6				6				6				—
Consumer
Home equity lines	196				—				196				—				64				64				260				—
Total acquired consumer	196				—				196				—				64				64				260				—
Total acquired TDRs	$	196			$	—			$	196			$	—			$	70			$	70			$	266			$	—
Covered loans
Commercial
C&I	$	795			$	742			$	1,537			$	—			$	—			$	—			$	1,537			$	446
CRE	5,479				37,545				43,024				—				—				—				43,024				2,832
Construction	925				3,115				4,040				—				—				—				4,040				1,001
Total covered commercial	7,199				41,402				48,601				—				—				—				48,601				4,279
Consumer
Home equity lines	5,256				497				5,753				—				—				—				5,753				—
Residential mortgages	152				—				152				—				—				—				152				—
Total covered consumer	5,408				497				5,905				—				—				—				5,905				—
Total covered TDRs	$	12,607			$	41,899			$	54,506			$	—			$	—			$	—			$	54,506			$	4,279
Total loans
Commercial
C&I	$	4,044			$	922			$	4,966			$	395			$	1,637			$	2,032			$	6,998			$	1,182
CRE	15,812				37,892				53,704				1,976				2,852				4,828				58,532				3,126
Construction	1,820				3,115				4,935				63				—				63				4,998				1,001
Total commercial	21,676				41,929				63,605				2,434				4,489				6,923				70,528				5,309
Consumer
Installment	24,194				1,261				25,455				2,803				320				3,123				28,578				552
Home equity lines	10,996				609				11,605				1,260				64				1,324				12,929				197
Credit card	1,134				117				1,251				—				2				2				1,253				261
Residential mortgages	12,718				3,094				15,812				4,046				3,359				7,405				23,217				1,302
Total consumer	49,042				5,081				54,123				8,109				3,745				11,854				65,977				2,312
Total TDRs	$	70,718			$	47,010			$	117,728			$	10,543			$	8,234			$	18,777			$	136,505			$	7,621
Loans modified in a TDR are closely monitored for delinquency as an early indicator of possible future default. If loans modified in a TDR subsequently default, the Corporation evaluates the loan for possible further impairment. The ALL may be increased, adjustments may be made in the allocation of the ALL, or partial charge-offs may be taken to further write-down the carrying value of the loan.
On an ongoing basis, the Corporation monitors the performance of modified loans to their restructured terms.  In the event of a subsequent default, the ALL continues to be reassessed on the basis of an individual evaluation of the loan.
The following table provides the number of loans modified in a TDR during the previous 12 months that subsequently defaulted during the three months ended September 30, 2014, as well as the recorded investment in these restructured loans as of September 30, 2014.
	As of September 30, 2014
(Dollars in thousands)	Number of Loans			Recorded Investment
Originated loans
Commercial
C&I	3			$	115
CRE	1			328
Construction	—			—
Total originated commercial	4			443
Consumer
Installment	4			22
Home equity lines	—			—
Credit card	—			—
Residential mortgages	—			—
Total originated consumer	4			$	22
Covered loans
Consumer
Installment	—			—
Home equity lines	—			—
Residential mortgages	—			—
Total covered consumer	—			$	—
Acquired loans
Consumer
Installment	1			77
Home equity lines	1			61
Residential mortgages	—			—
Total acquired consumer	2			$	138
Total loans
Commercial
C&I	3			$	115
CRE	1			328
Construction	—			—
Total commercial	4			443
Consumer
Installment	5			99
Home equity lines	1			61
Credit card	—			—
Residential mortgages	—			—
Total consumer	6			160
Total	10			$	603
	As of December 31, 2013
(Dollars in thousands)	Number of Loans			Recorded Investment
Originated loans
Commercial
C&I	4			$	1,773
CRE	6			3,101
Construction	1			231
Total originated commercial	11			5,105
Consumer
Installment	17			170
Home equity lines	—			—
Credit card	33			245
Residential mortgages	1			75
Total originated consumer	51			$	490
Covered loans
Commercial
C&I	—			$	—
CRE	1			—
Construction	1			45
Total covered commercial	2			$	45
Acquired loans
Commercial
C&I	—			$	—
CRE	—			—
Construction	—			—
Total acquired commercial	—			—
Consumer
Installment	—			—
Home equity lines	—			—
Residential mortgages	—			—
Total acquired consumer	—			$	—
Total loans
Commercial
C&I	4			$	1,773
CRE	7			3,101
Construction	2			276
Total commercial	13			5,150
Consumer
Installment	17			170
Home equity lines	—			—
Credit card	33			245
Residential mortgages	1			75
Total consumer	51			490
Total	64			$	5,640
	As of September 30, 2013
(Dollars in thousands)	Number of Loans			Recorded Investment
Originated loans
Commercial
C&I	—			$	—
CRE	1			920
Construction	—			—
Total originated commercial	1			920
Consumer
Installment	1			3
Home equity lines	1			24
Credit card	9			74
Residential mortgages	3			1,858
Total originated consumer	14			$	1,959
Covered loans
Consumer
Installment	—			—
Home equity lines	—			—
Residential mortgages	—			—
Total covered consumer	—			$	—
Acquired loans
Commercial
C&I	—			$	—
CRE	—			—
Construction	—			—
Total acquired commercial	—			—
Consumer
Installment	—			—
Home equity lines	—			—
Residential mortgages	—			—
Total acquired consumer	—			$	—
Total loans
Commercial
C&I	—			$	—
CRE	1			920
Construction	—			—
Total commercial	1			920
Consumer
Installment	1			3
Home equity lines	1			24
Credit card	9			74
Residential mortgages	3			1,858
Total consumer	14			1,959
Total	15			$	2,879

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Other Intangible Assets	'
	Goodwill and Other Intangible Assets
	Goodwill
	Goodwill totaled $741.7 million as of September 30, 2014, December 31, 2013, and September 30, 2013. Goodwill is not amortized but is evaluated for impairment on an annual basis at November 30 of each year or whenever events or changes in circumstances indicate the carrying value may not be recoverable. No events or circumstances since the November 30, 2013 annual impairment test were noted that would indicate it was more likely than not a goodwill impairment exists.
	Other Intangible Assets
	The Corporation has other intangible assets that are amortized, consisting of core deposit intangibles, lease intangibles and trust relationship intangibles. The following tables show the gross carrying amount, accumulated amortization, and net carrying amount of these intangible assets.
		September 30, 2014
		Gross Carrying		Accumulated			Net Carrying
	(In thousands)	Amount		Amortization			Amount
	Core deposit intangibles (a)	$	82,323	$	(17,712	)	$	64,611
	Lease intangible	238		(167		)	71
	Trust Relationships (b)	14,000		(4,729		)	9,271
		$	96,561	(22,608		)	$	73,953
		December 31, 2013
		Gross Carrying		Accumulated			Net Carrying
	(In thousands)	Amount		Amortization			Amount
	Core deposit intangibles (a)	$	87,533	$	(16,065	)	$	71,468
	Non-compete covenant	102		(102		)	—
	Lease intangible	238		(140		)	98
	Trust Relationships (b)	14,000		(2,811		)	11,189
		$	101,873	$	(19,118	)	$	82,755
		September 30, 2013
		Gross Carrying		Accumulated			Net Carrying
	(In thousands)	Amount		Amortization			Amount
	Core deposit intangibles (a)	$	87,533	$	(14,325	)	$	73,208
	Non-compete covenant	102		(96		)	6
	Lease intangible	238		(131		)	107
	Trust relationships (b)	14,000		(1,874		)	12,126
		$	101,873	$	(16,426	)	$	85,447
	(a) Core deposit intangibles are amortized on an accelerated basis over their estimated useful lives which range from 10-15 years.
	(b) Trust relationship intangibles are amortized on an accelerated basis on their estimated useful lives of 12 years.
	Amortization expense for intangible assets was $8.8 million in the nine months ended September 30, 2014, compared to $5.7 million in the nine months ended September 30, 2013. Estimated amortization expense for each of the next five years is as follows: 2014 - $2.9 million; 2015 - $10.4 million; 2016 - $9.2 million; 2017 - $8.2 million; and 2018 - $7.3 million.

Shareholders_Equity_Notes

Shareholders Equity (Notes)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Stockholders' Equity Note Disclosure	'
	Shareholders' Equity
	Common Stock Warrant
	The Corporation has an outstanding warrant issued to the U.S. Treasury to initially purchase 2,408,203 shares of FirstMerit Common Stock. Due to a dividend protection clause, which reduces the exercise price on a penny for penny basis for any dividend paid along with a corresponding increase in the amount of shares available to purchase, the U.S. Treasury can purchase up to 2,538,596 shares at an adjusted exercise price of $17.73 as of September 30, 2014.
	Preferred Stock
	The Corporation has 7,000,000 shares of authorized Preferred Stock and has designated 115,000 shares of its Preferred Stock as 5.875% Non-Cumulative Perpetual Preferred Stock, Series A. On February 4, 2013, the Corporation issued 100,000 shares of its 5.875% Non-Cumulative Perpetual Preferred Stock, Series A, which began paying cash dividends on May 4, 2013, quarterly in arrears on the 4th day of February, May, August and November.
	Earnings Per Share
	Basic net income per common share is calculated using the two-class method to determine income attributable to common shareholders. Net income attributable to Common Stock is then divided by the weighted-average number of Common Stock outstanding during the period.
	Diluted net income per common share is calculated under the more dilutive of either the treasury method or two-class method. Adjustments to the weighted-average number of shares of Common Stock outstanding are made only when such adjustments will dilute earnings per common share. Net income attributable to Common Stock is then divided by the weighted-average number of Common Stock and Common Stock equivalents outstanding during the period.
	The reconciliation between basic and diluted EPS using the two-class method and treasury stock method is presented as follows:
		Three Months Ended September 30,				Nine Months Ended September 30,
	(In thousands)	2014		2013		2014		2013
	Basic EPS:
	Net income	$	63,898	$	40,715	$	176,872	$	126,510
	Less:
	Cash dividends on 5.875% non-cumulative perpetual series A, Preferred Stock	1,469		1,469		4,407		3,868
	Income allocated to participating securities	519		310		1,433		1,102
	Net income attributable to common shareholders	$	61,910	$	38,936	$	171,032	$	121,540
	Weighted average Common Stock outstanding used in basic EPS	165,389		165,044		165,263		144,402
	Basic net income per common share	$	0.37	$	0.24	$	1.03	$	0.84
	Diluted EPS:
	Income used in diluted earnings per common share calculation	$	61,910	$	38,936	$	171,032	$	121,540
	Weighted average Common Stock outstanding used in basic EPS	165,389		165,044		165,263		144,402
	Add: Common Stock equivalents:
	Warrant and stock plans	415		830		653		2,990
	Weighted average Common and Common Stock equivalent shares outstanding	165,804		165,874		165,916		147,392
	Diluted net income per common share	$	0.37	$	0.23	$	1.03	$	0.82
	Common Stock equivalents consist of employee stock award plans and the Common Stock warrant. These Common Stock equivalents do not enter into the calculation of diluted EPS if the impact would be anti-dilutive, that is, increase EPS or reduce a loss per share. Antidilutive potential Common Stock for the nine months ended September 30, 2014 and 2013 totaled 0.9 million and 1.5 million, respectively.

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	Management monitors the Corporation’s results by an internal performance measurement system, which provides lines of business results and key performance measures. The profitability measurement system is based on internal financial management practices designed to produce consistent results and reflect the underlying economics of the businesses. The development and application of these methodologies is a dynamic process. Accordingly, these measurement tools and assumptions may be revised periodically to reflect methodological, product, and/or management organizational changes. Further, these tools measure financial results that support the strategic objectives and internal organizational structure of the Corporation. Consequently, the information presented is not necessarily comparable with similar information for other financial institutions.
	A description of each business, selected financial performance, and the methodologies used to measure financial performance are presented below.
	•	Commercial – The commercial line of business provides a full range of lending, depository, and related financial services to middle-market corporate, industrial, financial, core business banking, public entities, and leasing clients. Commercial also includes personal business from commercial loan clients in coordination with the Wealth Management segment. Products and services offered include commercial term loans, revolving credit arrangements, asset-based lending, leasing, commercial mortgages, real estate construction lending, letters of credit, treasury management, government banking, international banking, merchant card and other depository products and services.
	•	Retail – The retail line of business includes consumer lending and deposit gathering, residential mortgage loan origination and servicing, and branch-based small business banking (formerly known as the "micro business" line). Retail offers a variety of retail financial products and services including consumer direct and indirect installment loans, debit and credit cards, debit gift cards, residential mortgage loans, home equity loans and lines of credit, deposit products, fixed and variable annuities and ATM network services. Deposit products include checking, savings, money market accounts and certificates of deposit.
	•	Wealth – The wealth line of business offers a broad array of asset management, private banking, financial planning, estate settlement and administration, credit and deposit products and services. Trust and investment services include personal trust and planning, investment management, estate settlement and administration services. Retirement plan services focus on investment management and fiduciary activities. Brokerage and insurance delivers retail mutual funds, other securities, variable and fixed annuities, personal disability and life insurance products and brokerage services. Private banking provides credit, deposit and asset management solutions for affluent clients.
	•	Other – The other line of business includes activities that are not directly attributable to one of the three principal lines of business. Included in the Other category are the Parent Company, eliminations companies, community development operations, the treasury group, which includes the securities portfolio, wholesale funding and asset liability management activities, and the economic impact of certain assets, capital and support functions not specifically identifiable with the three primary lines of business.
	The accounting policies of the lines of businesses are the same as those of the Corporation described in Note 1 (Summary of Significant Accounting Policies) to the 2013 Form 10-K. Funds transfer pricing is used in the determination of net interest income by assigning a cost for funds used or credit for funds provided to assets and liabilities within each business unit. In the first quarter of 2014, Management changed the estimate regarding the funds transfer pricing crediting rate provided on non-maturity deposits, including amounts for prior periods. Assets and liabilities are match-funded based on their maturity, prepayment and/or repricing characteristics. As a result, the three primary lines of business are generally insulated from changes in interest rates. Changes in net interest income due to changes in rates are reported in Other by the treasury group. Capital has been allocated on an economic risk basis. Loans and lines of credit have been allocated capital based upon their respective credit risk. Asset management holdings in the Wealth segment have been allocated capital based upon their respective market risk related to assets under management. Normal business operating risk has been allocated to each line of business by the level of noninterest expense. Mismatch between asset and liability cash flow as well as interest rate risk for mortgage servicing rights and the origination business franchise value have been allocated capital based upon their respective asset/liability management risk. The provision for loan loss is allocated based upon the actual net charge-offs of each respective line of business, adjusted for loan growth and changes in risk profile. Noninterest income and expenses directly attributable to a line of business are assigned to that line of business. Expenses for centrally provided services are allocated to the business line by various activity based cost formulas.
	Substantially all of the Corporation’s business is conducted in the United States of America. The following tables present a summary of financial results as of and for the three and nine months ended September 30, 2014 and September 30, 2013:
																								FirstMerit
	(In thousands)	Commercial						Retail				Wealth						Other						Consolidated
	September 30, 2014	QTD			YTD			QTD		YTD		QTD			YTD			QTD			YTD			QTD		YTD
	OPERATIONS:
	Net interest income (loss)	$	105,191		$	317,178		$	95,710	$	283,839	$	5,119		$	14,596		$	(12,442	)	$	(32,556	)	$	193,578	$	583,057
	Provision (recapture) for loan losses	(7,642		)	(7,476		)	7,627		25,149		362			713			8,845			20,596			9,192		38,982
	Noninterest income	21,096			69,083			28,270		80,651		14,108			41,624			6,259			18,206			69,733		209,564
	Noninterest expense	58,221			181,435			85,954		269,331		12,777			37,874			6,193			11,238			163,145		499,878
	Net income (loss)	49,211			137,995			19,759		45,506		3,956			11,460			(9,028		)	(18,089		)	63,898		176,872
	AVERAGES:
	Assets	$	9,407,684		$	9,225,407		$	5,700,960	$	5,565,047	$	289,549		$	263,513		$	9,185,583		$	9,283,686		$	24,583,776	$	24,337,653
																								FirstMerit
	(In thousands)	Commercial						Retail				Wealth						Other						Consolidated
	September 30, 2013	QTD			YTD			QTD		YTD		QTD			YTD			QTD			YTD			QTD		YTD
	OPERATIONS:
	Net interest income (loss)	$	117,476		$	300,423		$	103,046	$	248,704	$	4,286		$	12,727		$	(21,468	)	$	(49,137	)	$	203,340	$	512,717
	Provision (recapture) for loan losses	(27		)	6,866			905		7,071		(736		)	(570		)	6,237			10,267			6,379		23,634
	Noninterest income	21,364			60,980			30,723		88,916		13,216			34,347			5,787			13,680			71,090		197,923
	Noninterest expense	57,033			151,587			96,153		235,518		14,650			38,698			42,763			79,830			210,599		505,633
	Net income (loss)	53,136			131,704			23,910		61,985		2,090			5,469			(38,421		)	(72,648		)	40,715		126,510
	AVERAGES:
	Assets	$	8,685,333		$	8,020,824		$	5,659,553	$	4,646,817	$	266,028		$	255,538		$	9,402,680		$	7,709,479		$	24,013,594	$	20,632,658

Derivatives_Instruments_and_He

Derivatives Instruments and Hedging Activities Disclosure	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments and Hedging Activities Disclosure	'
	Derivatives and Hedging Activities
	The Corporation, through its mortgage banking and risk management operations, is party to various derivative instruments that are used for asset and liability management and customers' financing needs. Derivative instruments are contracts between two or more parties that have a notional amount and underlying variable, require no net investment and allow for the net settlement of positions. The notional amount serves as the basis for the payment provision of the contract and takes the form of units, such as shares or dollars. The underlying variable represents a specified interest rate, index or other component. The interaction between the notional amount and the underlying variable determines the number of units to be exchanged between the parties and influences the market value of the derivative contract.
	The predominant derivative and hedging activities include interest rate swaps and certain mortgage banking activities. Generally, these instruments help the Corporation manage exposure to market risk, and meet customer financing needs. Market risk represents the possibility that economic value or net interest income will be adversely affected by fluctuations in external factors, such as interest rates, market-driven rates and prices or other economic factors. Foreign exchange contracts are entered into to accommodate the needs of customers.
	Derivatives Designated in Hedge Relationships
	The Corporation's fixed rate loans result in exposure to losses in value as interest rates change. The risk management objective for hedging fixed rate loans is to convert the fixed rate received to a floating rate. The Corporation hedges exposure to changes in the fair value of fixed rate loans through the use of swaps. For a qualifying fair value hedge, changes in the value of the derivatives that have been highly effective as hedges are recognized in current period earnings along with the corresponding changes in the fair value of the designated hedged item attributable to the risk being hedged.
	At September 30, 2014, December 31, 2013, and September 30, 2013, the notional values or contractual amounts and fair value of the Corporation's derivatives designated in hedge relationships were as follows:
		Asset Derivatives																		Liability Derivatives
		September 30, 2014						December 31, 2013							September 30, 2013					September 30, 2014				December 31, 2013				September 30, 2013
	(In thousands)	Notional/ Contract Amount			Fair Value (a)			Notional/ Contract Amount			Fair Value (a)				Notional/ Contract Amount			Fair Value (a)		Notional/ Contract Amount		Fair Value (b)		Notional/ Contract Amount		Fair Value (b)		Notional/ Contract Amount		Fair Value (b)
	Interest rate swaps:
	Fair value hedges	$	—		$	—		$	—		$	—			$	—		$	—	$	100,490	$	7,584	$	126,637	$	11,574	$	133,159	$	13,289
	(a) Included in "Other assets" on the Consolidated Balance Sheets
	(b) Included in "Other liabilities" on the Consolidated Balance Sheets
	Fair Value Hedges. Prior to 2009, the Corporation entered into interest rate swaps with dealer counterparties to convert certain fixed rate loans to variable rate instruments over the terms of the loans (termed by the Corporation as the FRAP Program). These interest rate swaps are designated as fair value hedges and met the criteria to qualify for the short cut method of accounting. Based on this shortcut method of accounting treatment, no ineffectiveness is assumed. The Corporation discontinued originating interest rate swaps under the FRAP Program in February 2008.
	Derivatives Not Designated in Hedge Relationships
	As of September 30, 2014, December 31, 2013, and September 30, 2013, the notional values or contractual amounts and fair value of the Corporation's derivatives not designated in hedge relationships were as follows:
		Asset Derivatives																		Liability Derivatives
		September 30, 2014						December 31, 2013							September 30, 2013					September 30, 2014				December 31, 2013				September 30, 2013
	(In thousands)	Notional/ Contract Amount			Fair Value (a)			Notional/ Contract Amount			Fair Value (a)				Notional/ Contract Amount			Fair Value (a)		Notional/ Contract Amount		Fair Value (b)		Notional/ Contract Amount		Fair Value (b)		Notional/ Contract Amount		Fair Value (b)
	Interest rate swaps	$	1,655,371		$	40,937		$	1,622,525		$	46,577			$	1,546,228		$	51,044	$	1,655,371	$	40,937	$	1,622,531	$	46,577	$	1,546,228	$	51,044
	Mortgage loan commitments	167,634			1,975			90,541			891				144,572			2,729		—		—		—		—		—		—
	Forward sales contracts	—			—			40,906			384				—			—		67,528		91		—		—		68,581		1,081
	Credit contracts	20,504			—			—			—				—			—		58,157		—		49,914		—		50,336		—
	Foreign exchange	14,745			185			6,478			50				5,716			66		14,074		153		6,893		50		6,295		92
	Equity swap	—			—			—			—				—			—		61,145		515		63,813		—		54,763		—
	Total	$	1,858,254		$	43,097		$	1,760,450		$	47,902			$	1,696,516		$	53,839	$	1,856,275	$	41,696	$	1,743,151	$	46,627	$	1,726,203	$	52,217
	(a) Included in "Other assets" on the Consolidated Balance Sheets
	(b) Included in "Other liabilities" on the Consolidated Balance Sheets
	Interest Rate Swaps. The Corporation's Back-to-Back Program is an interest rate swap program for commercial loan customers that provides the customer with a fixed rate loan while creating a variable rate asset for the Corporation through the customer entering into an interest rate swap with the Corporation on terms that match the loan. The Corporation offsets its risk exposure by entering into an offsetting interest rate swap with a dealer counterparty. These swaps do not qualify as designated hedges; therefore, each swap is accounted for as a standalone derivative.
	Mortgage banking. In the normal course of business, the Corporation sells originated mortgage loans into the secondary mortgage loan markets. During the period of loan origination and prior to the sale of the loans in the secondary market, the Corporation has exposure to movements in interest rates associated with mortgage loans that are in the "mortgage pipeline" and the "mortgage warehouse". A pipeline loan is one in which the Corporation has entered into a written mortgage loan commitment with a potential borrower that will be held for resale. Once a mortgage loan is closed and funded, it is included within the mortgage warehouse of loans awaiting sale and delivery into the secondary market.
	Written loan commitments that relate to the origination of mortgage loans that will be held for resale are considered free-standing derivatives and do not qualify for hedge accounting. Written loan commitments generally have a term of up to 60 days before the closing of the loan. The loan commitment does not bind the potential borrower to entering into the loan, nor does it guarantee that the Corporation will approve the potential borrower for the loan. Therefore, when determining fair value, the Corporation makes estimates of expected "fallout" (loan commitments not expected to close), using models which consider cumulative historical fallout rates and other factors. In addition, expected net future cash flows related to loan servicing activities are included in the fair value measurement of a written loan commitment.
	Written loan commitments in which the borrower has locked in an interest rate results in market risk to the Corporation to the extent market interest rates change from the rate quoted to the borrower. The Corporation economically hedges the risk of changing interest rates associated with its interest rate lock commitments by entering into forward sales contracts.
	The Corporation's warehouse (mortgage loans held for sale) is subject to changes in fair value, due to fluctuations in interest rates from the loan's closing date through the date of sale of the loan into the secondary market. Typically, the fair value of the warehouse declines in value when interest rates increase and rises in value when interest rates decrease. To mitigate this risk, the Corporation enters into forward sales contracts on a significant portion of the warehouse to provide an economic hedge against those changes in fair value. Mortgage loans held for sale and the forward sales contracts were recorded at fair value with ineffective changes in value recorded in current earnings as Loan sales and servicing income.
	Credit contracts. The Corporation has bought and sold credit protection in the form of participations on interest rate swaps (swap participations). These swap participations, which meet the definition of credit derivatives, were entered into in the ordinary course of business. Credit derivatives, whereby the Corporation has purchased credit protection, entitles the Corporation to receive a payment from the counterparty when the customer fails to make payment on any amounts due to the Corporation. Swap participations whereby the Corporation has purchased credit protection have maturities that range between three to nine years. For swap participations where the Corporation sold credit protection, the Corporation has guaranteed payment in the event that the counterparty experiences a loss on the swap due to a failure to pay by the Corporation's commercial loan customer. The Corporation simultaneously entered into reimbursement agreements with the commercial loan customers obligating the customers to reimburse the Corporation for any payments it makes under the swap participations. The Corporation monitors its payment risk on its swap participations by monitoring the creditworthiness of its commercial loan customers, which is based on the normal credit review process the Corporation would have performed had it entered into these derivative instruments directly with the commercial loan customers. Credit derivatives whereby the Corporation has sold credit protection have maturities ranging from less than one year to ten years. The Corporation's maximum estimated exposure to sold swap participations, as measured by projecting a maximum value of the guaranteed derivative instruments based on interest rate curve simulations and assuming 100% default by all obligors on the maximum values, was approximately $4.2 million as of September 30, 2014. The fair values of the sold swap participations were not material at September 30, 2014, December 31, 2013, and September 30, 2013.
	Gains and losses recognized in income on non-designated hedging instruments for the three and nine months ended September 30, 2014 and 2013 are as follows:
	Derivatives not		Location of Gain/(Loss)	Amount of Gain / (Loss) Recognized in Income on Derivatives (In thousands)
	designated as hedging		Recognized
	instruments		in Income on	Three Months Ended September 30,						Nine Months Ended September 30,
			Derivative	2014			2013			2014				2013
	Mortgage loan commitments		Other operating income	$	(516	)	$	1,950		$	1,084			$	(1,672	)
	Forward sales contracts		Other operating income	454			(5,538		)	(476		)		(1,019		)
	Foreign exchange contracts		Other operating income	320			195			1,012				(118		)
	Equity swap		Other operating expense	515			—			515				—
	Total			$	773		$	(3,393	)	$	2,135			$	(2,809	)
	Counterparty Credit Risk
	Like other financial instruments, derivatives contain an element of "credit risk" or the possibility that the Corporation will incur a loss because a counterparty, which may be a bank, a broker-dealer, a derivative clearing organization, or a customer, fails to meet its contractual obligations. This risk is measured as the expected positive replacement value of contracts. Derivative contracts may be executed with a counterparty or cleared through a FCM with a derivative clearing organization approved by the Corporation's ALCO, and only within the Corporation's Board of Directors Credit Committee approved credit exposure limits. Where contracts have been created for customers, the Corporation enters into derivatives with dealers to offset its risk exposure. To manage the credit exposure to exchanges and counterparties, the Corporation generally enters into bilateral collateral agreements using standard forms published by the ISDA. These agreements are to include thresholds of credit exposure or the maximum amount of unsecured credit exposure that the Corporation is willing to assume. Beyond the threshold levels, collateral in the form of securities made available from the investment portfolio or other forms of collateral acceptable under the bilateral collateral agreements are provided. The threshold levels for each counterparty are established by the Corporation's ALCO. Under the Dodd-Frank legislation, as of June 10, 2013, the Corporation must clear all interest rate swaps through a clearing house and the credit exposure is to the recognized derivative clearing organization. Margin requirements are established by the derivative clearing organization. When entering into cleared swap, the Corporation must post collateral to the FCM in the amount required by the clearing organization. The Corporation generally posts collateral in the form of highly rated Government Agency issued bonds or MBS. Collateral posted against derivative liabilities was $55.0 million, $70.5 million and $78.2 million as of September 30, 2014, December 31, 2013, and September 30, 2013, respectively.
	Derivative assets and liabilities are recorded at fair value on the balance sheet and do not take into account the effects of master netting agreements the Corporation has with its financial institution counterparties. These master netting agreements allow the Corporation to settle all derivative contracts held with a single financial institution counterparty on a net basis, and to offset net derivative positions with related collateral, where applicable. Collateral, usually in the form of investment securities, is posted by the counterparty with net liability position in accordance with contract thresholds. The following tables illustrate the potential effect of the Corporation's derivative master netting arrangements, by type of financial instrument, on the Corporation's statement of financial position as of September 30, 2014, December 31, 2013, and September 30, 2013. The swap agreements the Corporation has in place with its commercial customers are not subject to enforceable master netting arrangements, and, therefore, are excluded from these tables.
		As of September 30, 2014
		Gross amounts recognized			Gross amounts offset in the consolidated balance sheet			Net amounts presented in the consolidated balance sheet			Gross amounts not offset in the consolidated balance sheet							Net amount
	(In thousands)										Financial instruments (a)				Collateral (b)
	Derivative Assets
	Interest rate swaps - non-designated	$	1,498		$	—		$	1,498		$	(1,498	)		$	—		$	—
	Foreign exchange	180			—			180			—				(180		)	—
	Total derivative assets	$	1,678		$	—		$	1,678		$	(1,498	)		$	(180	)	$	—
	Derivative liabilities
	Interest rate swaps - designated	$	7,584		$	—		$	7,584		$	—			$	(7,584	)	$	—
	Interest rate swaps - non-designated	39,439			—			39,439			(1,498		)		(37,941		)	—
	Foreign exchange	—			—			—			—				—			—
	Total derivative liabilities	$	47,023		$	—		$	47,023		$	(1,498	)		$	(45,525	)	$	—
		As of December 31, 2013
		Gross amounts recognized			Gross amounts offset in the consolidated balance sheet			Net amounts presented in the consolidated balance sheet			Gross amounts not offset in the consolidated balance sheet							Net amount
	(In thousands)										Financial instruments (a)				Collateral (b)
	Derivative assets
Interest rate swaps - non-designated	$	4,791		$	—		$	4,791		$	(4,791	)		$	—		$	—
Foreign exchange	4			—			4			(4		)		—			—
Total derivative assets	$	4,795		$	—		$	4,795		$	(4,795	)		$	—		$	—
Derivative liabilities
Interest rate swaps - designated	$	11,574		$	—		$	11,574		$	—			$	(11,574	)	$	—
Interest rate swaps - non-designated	41,787			—			41,787			(4,791		)		(36,996		)	—
Foreign exchange	46			—			46			(4		)		(42		)	—
Total derivative liabilities	$	53,407		$	—		$	53,407		$	(4,795	)		$	(48,612	)	$	—
	As of September 30, 2013
	Gross amounts recognized			Gross amounts offset in the consolidated balance sheet			Net amounts presented in the consolidated balance sheet			Gross amounts not offset in the consolidated balance sheet							Net amount
(In thousands)										Financial instruments (a)				Collateral (b)
Derivative assets
Interest rate swaps - non-designated	$	2,585		$	—		$	2,585		$	(2,585	)		$	—		$	—
Foreign exchange	66			—			66			(92		)		26			—
Total derivative assets	$	2,651		$	—		$	2,651		$	(2,677	)		$	26		$	—
Derivative liabilities
Interest rate swaps - designated	$	13,289		$	—		$	13,289		$	—			$	(13,289	)	$	—
Interest rate swaps - non-designated	48,458			—			48,458			(2,585		)		(45,873		)	—
Foreign exchange	92			—			92			(92		)		—			—
Total derivative liabilities	$	61,839		$	—		$	61,839		$	(2,677	)		$	(59,162	)	$	—
(a) For derivative assets, this includes any derivative liability fair values that could be offset in the event of counterparty default. For derivative liabilities, this includes any derivative asset fair values that could be offset in the event of counterparty default.
(b) For derivate assets, this includes the fair value of collateral received by the Corporation from the counterparty. Securities received as collateral are not included in the Consolidated Balance Sheets unless the counterparty defaults. For derivative liabilities, this includes the fair value of securities pledged by the Corporation to the counterparty. These securities are included in the Consolidated Balance Sheets unless the Corporation defaults.

Benefit_Plans

Benefit Plans	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Pension and Other Postretirement Benefits Disclosure	'
	Benefit Plans
	The Corporation sponsors several qualified and nonqualified pension and other postretirement plans for certain of its employees. The net periodic pension cost is based on estimated values provided by an outside actuary. The components of net periodic benefit cost are as follows:
		Pension Benefits
		Three Months Ended September 30,						Nine Months Ended September 30,
	(In thousands)	2014			2013			2014			2013
	Service cost	$	182		$	585		$	546		$	1,755
	Interest cost	3,584			2,632			10,753			7,896
	Expected return on assets	(4,009		)	(2,960		)	(12,026		)	(8,880		)
	Amortization of unrecognized prior service costs	633			117			1,965			351
	Amortization of Actuarial Gain	708			1,174			2,221			3,522
	Net periodic pension cost	$	1,098		$	1,548		$	3,459		$	4,644
		Postretirement Benefits
		Three Months Ended September 30,						Nine Months Ended September 30,
	(In thousands)	2014			2013			2014			2013
	Service cost	$	16		$	24		$	49		$	74
	Interest cost	164			130			491			390
	Amortization of unrecognized prior service costs	(117		)	(117		)	(351		)	(351		)
	Amortization of Actuarial Gain	59			67			177			201
	Net periodic postretirement cost	$	122		$	104		$	366		$	314
	For further information on the Corporation's employee benefit plans, refer to Note 13 (Benefit Plans) to the consolidated financial statements in the 2013 Form 10-K.

Fair_Value_Measurement

Fair Value Measurement	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurement	'
	Fair Value Measurement
	As defined in ASC 820, Fair Value Measurements and Disclosures, fair value is defined as the price to sell an asset or transfer a liability in an orderly transaction between market participants in the principal market or most advantageous market for the asset or liability. Fair value is based on quoted market prices, when available, for identical or similar assets or liabilities. In the absence of quoted market prices, Management determines the fair value of the Corporation's assets and liabilities using valuation models or third-party pricing services. Both of these approaches rely on market-based parameters when available, such as interest rate yield curves, option volatilities and credit spreads, or unobservable inputs. Unobservable inputs may be based on Management's judgment, assumptions and estimates related to credit quality, liquidity, interest rates and other relevant inputs.
	GAAP establishes a three-level valuation hierarchy for determining fair value that is based on the transparency of the inputs used in the valuation process. The inputs used in determining fair value in each of the three levels of the hierarchy, highest ranking to lowest, are as follow:
	•	Level 1 — Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.
	•	Level 2 — Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.
	•	Level 3 — Significant unobservable inputs that reflect a company's own assumptions about the assumptions that market participants would use in pricing an asset or liability.
	The level in the fair value hierarchy ascribed to a fair value measurement in its entirety is based on the lowest level input that is significant to the overall fair value measurement.
	Valuation adjustments, such as those pertaining to counterparty and the Corporation's own credit quality and liquidity, may be necessary to ensure that assets and liabilities are recorded at fair value.  Credit valuation adjustments are made when market pricing does not accurately reflect the counterparty's credit quality.  As determined by Management, liquidity valuation adjustments may be made to the fair value of certain assets to reflect the uncertainty in the pricing and trading of the instruments when Management is unable to observe recent market transactions for identical or similar instruments. Liquidity valuation adjustments are based on the following factors:
	•	the amount of time since the last relevant valuation;
	•	whether there is an actual trade or relevant external quote available at the measurement date; and
	•	volatility associated with the primary pricing components.
	Management ensures that fair value measurements are accurate and appropriate by relying upon various controls, including:
	•	an independent review and approval of valuation models;
	•	recurring detailed reviews of profit and loss; and
	•	a validation of valuation model components against benchmark data and similar products, where possible.
	Management reviews any changes to its valuation methodologies to ensure they are appropriate and justified, and refines valuation methodologies as more market-based data becomes available.  Transfers between levels of the fair value hierarchy are recognized at the end of the reporting period.
	Additional information regarding the Corporation's accounting policies for determining fair value is provided in Note 1 (Summary of Significant Accounting Policies) under the heading "Fair Value Measurements" to the 2013 Form 10-K.
	The following tables present the balance of assets and liabilities measured at fair value on a recurring and nonrecurring basis as of September 30, 2014, December 31, 2013, and September 30, 2013:
					Fair Value by Hierarchy
	(In thousands)	30-Sep-14			Level 1		Level 2			Level 3
	Recurring fair value measurement
	Available-for-sale securities:
	Marketable equity securities	$	2,916		$	2,916	$	—		$	—
	Non-marketable equity securities	2,500			—		—			2,500
	U.S. States and political subdivisions	237,067			—		237,067			—
	Residential mortgage-backed securities:
	U.S. government agencies	996,387			—		996,387			—
	Commercial mortgage-backed securities:
	U.S. government agencies	84,764			—		84,764			—
	Residential collateralized mortgage-backed securities:
	U.S. government agencies	1,600,317			—		1,600,317			—
	Non-agency	7			—		1			6
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies	194,017			—		194,017			—
	Corporate debt securities	54,594			—		—			54,594
	Asset-backed securities:
	Collateralized loan obligations	290,421			—		—			290,421
	Total available for sale securities	3,462,990			2,916		3,112,553			347,521
	Residential loans held for sale	19,512			—		19,512			—
	Derivative assets:
	Interest rate swaps - nondesignated	40,937			—		40,937			—
	Mortgage loan commitments	1,975			—		1,975			—
	Foreign exchange	185			—		185			—
	Total derivative assets	43,097			—		43,097			—
	Total fair value of assets (a)	$	3,525,599		$	2,916	$	3,175,162		$	347,521
	Derivative liabilities:
	Interest rate swaps - fair value hedges	$	7,584		$	—	$	7,584		$	—
	Interest rate swaps - nondesignated	40,937			—		40,937			—
	Forward sales contracts	91			—		91			—
	Foreign exchange	153			—		153			—
	Equity swap	515			—		—			515
	Total derivative liabilities	49,280			—		48,765			515
	True-up liability	12,804			—		—			12,804
	Total fair value of liabilities (a)	$	62,084		$	—	$	48,765		$	13,319
	Nonrecurring fair value measurement
	Mortgage servicing rights (b)	$	22,229		$	—	$	—		$	22,229
	Impaired loans (c)	55,406			—		—			55,406
	Other property (d)	14,896			—		—			14,896
	Other real estate covered by loss share (e)	5,798			—		—			5,798
	Total fair value	$	98,329		$	—	$	—		$	98,329
	(a) - There were no transfers between levels 1, 2 or 3 of the fair value hierarchy during the three months ended September 30, 2014.
	(b) - MSRs with a recorded investment of $22.2 million were reduced by a specific valuation allowance totaling $0.5 million to a reported carrying value of $21.7 million resulting in recognition of $0.1 million in recoveries included in loans sales and servicing income in the three months ended September 30, 2014.
	(c) - Collateral dependent impaired loans with a recorded investment of $59.9 million were reduced by specific valuation allowance allocations totaling $4.5 million to a reported net carrying value of $55.4 million.
(d) - Amounts do not include assets held at cost at September 30, 2014. During the three months ended September 30, 2014, the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.7 million included in noninterest expense.
(e) - Amounts do not include assets held at cost at September 30, 2014. During the three months ended September 30, 2014, the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses $0.1 million included in noninterest expense.
				Fair Value by Hierarchy
(In thousands)	31-Dec-13			Level 1		Level 2			Level 3
Recurring fair value measurement
Available-for-sale securities:
Marketable equity securities	$	3,036		$	3,036	$	—		$	—
Nonmarketable equity securities	3,281			—		10			3,271
U.S. States and political subdivisions	262,367			—		262,367			—
Residential mortgage-backed securities:
U.S. government agencies	969,922			—		969,922			—
Commercial mortgage-backed securities:
U.S. government agencies	69,567			—		69,567			—
Residential collateralized mortgage-backed securities:
U.S. government agencies	1,518,393			—		1,518,393			—
Non-agency	9			—		—			9
Commercial collateralized mortgage-backed securities:
U.S. government agencies	102,268			—		102,268			—
Corporate debt securities	50,644			—		—			50,644
Asset-backed securities
Collateralized loan obligations	293,687			—		—			293,687
Total available-for-sale securities	3,273,174			3,036		2,922,527			347,611
Residential loans held for sale	11,622			—		11,622			—
Derivative assets:
Interest rate swaps - nondesignated	46,577			—		46,577			—
Mortgage loan commitments	891			—		891			—
Forward sale contracts	384			—		384			—
Foreign exchange	50			—		50			—
Total derivative assets	47,902			—		47,902			—
Total fair value of assets (a)	$	3,332,698		$	3,036	$	2,982,051		$	347,611
Derivative liabilities:
Interest rate swaps - fair value hedges	$	11,574		$	—	$	11,574		$	—
Interest rate swaps - nondesignated	46,577			—		46,577			—
Foreign exchange	50			—		50			—
Total derivative liabilities	58,201			—		58,201			—
True-up liability	11,463			—		—			11,463
Total fair value of liabilities (a)	$	69,664		$	—	$	58,201		$	11,463
Nonrecurring fair value measurement
Mortgage servicing rights (b)	$	23,041		$	—	$	—		$	23,041
Impaired loans (c)	47,870			—		—			47,870
Other property (d)	10,018			—		—			10,018
Other real estate covered by loss share (e)	8,754			—		—			8,754
Total fair value	$	89,683		$	—	$	—		$	89,683
(a) - There were no transfers between levels 1, 2 or 3 of the fair value hierarchy during the year ended December 31, 2013.
(b) - MSRs with a recorded investment of $22.8 million were reduced by a specific valuation allowance totaling $0.3 million to a reported carrying value of $22.5 million resulting in a recovery of previously recognized expense of $2.3 million in recoveries included in loans sales and servicing income in the year ended ended December 31, 2013.
(c) - Collateral dependent impaired loans with a recorded investment of $52.6 million were reduced by specific valuation allowance allocations totaling $4.8 million to a reported net carrying value of $47.9 million.
(d) Amounts do not include assets held at cost at December 31, 2013. During the year ended December 31, 2013, the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $1.4 million included in noninterest expense.
(e) Amounts do not include assets held at cost at December 31, 2013. During the year ended December 31, 2013, the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $1.0 million included in noninterest expense.
				Fair Value by Hierarchy
(In thousands)	30-Sep-13			Level 1		Level 2			Level 3
Recurring fair value measurement
Available-for-sale securities:
Marketable equity securities	$	3,096		$	3,096	$	—		$	—
Non-marketable equity securities	3,281					10			3,271
U.S. States and political subdivisions	272,224			—		272,224			—
Residential mortgage-backed securities:
U.S. government agencies	999,375			—		999,375			—
Commercial mortgage-backed securities:
U.S. government agencies	55,932			—		55,932			—
Residential collateralized mortgage-backed securities:
U.S. government agencies	1,505,706			—		1,505,706			—
Non-agency	9			—		—			9
Commercial collateralized mortgage-backed securities:
U.S. government agencies	97,154			—		97,154			—
Corporate debt securities	50,850			—		—			50,850
Asset-backed securities:
Collateralized loan obligations	268,632			—		—			268,632
Total available-for-sale securities	3,256,259			3,096		2,930,401			322,762
Residential loans held for sale	17,813			—		17,813			—
Derivative assets:
Interest rate swaps - nondesignated	51,044			—		51,044			—
Mortgage loan commitments	2,729			—		2,729			—
Foreign exchange	66			—		66			—
Total derivative assets	53,839			—		53,839			—
Total fair value of assets (a)	$	3,327,911		$	3,096	$	3,002,053		$	322,762
Derivative liabilities:
Interest rate swaps - fair value hedges	13,289			—		13,289			—
Interest rate swaps - nondesignated	51,044			—		51,044			—
Forward sale contracts	1,081			—		1,081			—
Foreign exchange	92			—		92			—
Total derivative liabilities	65,506			—		65,506			—
True-up liability	11,457			—		—			11,457
Total fair value of liabilities (a)	$	76,963		$	—	$	65,506		$	11,457
Nonrecurring fair value measurement
Mortgage servicing rights (b)	$	22,616		$	—	$	—		$	22,616
Impaired loans (c)	48,129			—		—			48,129
Other property (d)	13,413			—		—			13,413
Other real estate covered by loss share (e)	8,475			—		—			8,475
Total fair value	$	92,633		$	—	$	—		$	92,633
(a) - There were no transfers between levels 1, 2 and 3 of the fair value hierarchy during the three months ended September 30, 2013.
(b) - MSRs with a recorded investment of $22.9 million were reduced by a specific valuation allowance totaling $0.6 million to a reported carrying value of $22.4 million resulting in recovery of a previously recognized expense of $0.1 million in the three months ended September 30, 2013.
(c) - Collateral dependent impaired loans with a recorded investment of $51.3 million were reduced by specific valuation allowance allocations totaling $3.1 million to a reported net carrying value of $48.1 million.
(d) - Amounts do not include assets held at cost at September 30, 2013. During the three months ended September 30, 2013, the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.3 million included in noninterest expense.
(e) - Amounts do not include assets held at cost at September 30, 2013. During the three months ended September 30, 2013, the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.2 million included in noninterest expense.
The following section describes the valuation methodologies used by the Corporation to measure financial assets and liabilities at fair value. During the three months ended September 30, 2014 and 2013, there were no significant changes to the valuation techniques used by the Corporation to measure fair value.
Available-for-sale securities. When quoted prices are available in an active market, securities are valued using the quoted price and are classified as Level 1. The quoted prices are not adjusted. Level 1 instruments include money market mutual funds.
Securities are classified as Level 2 if quoted prices for identical securities are not available, and fair value is determined using pricing models by a third-party pricing service.   Approximately 90% of the available-for-sale portfolio is Level 2. For the majority of available-for sale securities, the Corporation obtains fair value measurements from an independent third-party pricing service. These instruments include: municipal bonds; bonds backed by the U.S. government; corporate bonds; MBS; securities issued by the U.S. Treasury; and certain agency CMOs.  The independent pricing service uses industry-standard models to price U.S. Government agencies and MBS that consider various assumptions, including time value, yield curves, volatility factors, prepayment speeds, default rates, loss severity, current market and contractual prices for the underlying financial instruments, as well as other relevant economic measures. Obligations of state and political subdivisions are valued using a matrix, or grid, pricing in which securities are benchmarked against the treasury rate based on credit rating. For collateralized mortgage securities, depending on the characteristics of a given tranche, a volatility driven multidimensional static model or Option-Adjusted Spread model is generally used. Substantially all assumptions used by the independent pricing service for securities classified as Level 2 are observable in the marketplace, can be derived from observable data, or are supported by observable levels at which transactions are executed in the marketplace.
Securities are classified as Level 3 when there is limited activity in the market for a particular instrument and fair value is determined by obtaining broker quotes. As of September 30, 2014, 10% of the available-for-sale portfolio is Level 3, which consists of single issuer trust preferred securities and CLOs.
The single issuer trust preferred securities are measured at unadjusted prices obtained from the independent pricing service. The independent pricing service prices these instruments through a broker quote when sufficient information, such as cash flows or other security structure or market information, is not available to produce an evaluation. Broker-quoted securities are adjusted by the independent pricing service based solely on the receipt of updated quotes from market makers or broker-dealers recognized as market participants. A list of such issues is compiled by the independent pricing service daily. For broker-quoted issues, the independent pricing service applies a zero spread relationship to the bid-side valuation, resulting in the same values for the mean and ask.
CLO are securitized products where payments from multiple middle-sized and large business loans are pooled together and segregated into different classes of bonds with payments on these bonds based on their priority within the overall deal structure. The markets for such securities are generally characterized by low trading volumes and wide bid-ask spreads, all driven by more limited market participants. Although estimated prices are generally obtained for such securities, the level of market observable assumptions used is limited in the valuation. Specifically, market assumptions regarding credit adjusted cash flows and liquidity influences on discount rates were difficult to observe at the individual bond level. Accordingly, the securities are currently valued by a third-party that primarily utilizes dealer or pricing service prices and, subsequently, verifies this pricing through a disciplined process to ensure proper valuations and to highlight differences in cash flow modeling or other risks to determine if the market perception of the risk of a CLO is beginning to deviate from other similar tranches.  This is done by establishing ranges for appropriate pricing yields for each CLO tranche and, using a standardized cash flow scenario, ensuring yields are consistent with expectations.
On a monthly basis, Management validates the pricing methodologies utilized by our independent pricing service to ensure the fair-value determination is consistent with the applicable accounting guidance and that the investments are properly classified in the fair value hierarchy. Management substantiates the fair values determined for a sample of securities held in portfolio by reviewing the key assumptions used by the independent pricing service to value the securities and comparing the fair values to prices from other independent sources for the same and similar securities. Management analyzes variances and conducts additional research with the independent pricing service, if necessary, and takes appropriate action based on its findings.
Loans held for sale. These loans are regularly traded in active markets through programs offered by FHLMC and FNMA, and observable pricing information is available from market participants. The prices are adjusted as necessary to include any embedded servicing value in the loans and to take into consideration the specific characteristics of certain loans. These adjustments represent unobservable inputs to the valuation but are not considered significant to the fair value of the loans. Accordingly, residential real estate loans held for sale are classified as Level 2.
Impaired loans. Certain impaired collateral dependent loans are reported at fair value less costs to sell the collateral. Collateral values are estimated using Level 3 inputs, consisting of third-party appraisals or price opinions and internal adjustments necessary in the judgment of Management to reflect current market conditions and current operating results for the specific collateral. Collateral may be in the form of real estate or personal property including equipment and inventory. The vast majority of the collateral is real estate. When impaired collateral dependent loans are individually re-measured and reported at fair value of the collateral, less costs to sell, a direct loan charge off to the ALL and/or a specific valuation allowance allocation is recorded.
Other Property. Certain other property which consists of foreclosed assets and properties securing residential and commercial loans, upon initial recognition and transfer from loans, are re-measured and reported at fair value less costs to sell to the property through a charge-off to the ALL based on the fair value of the foreclosed assets. The fair value of a foreclosed asset, upon initial recognition, is estimated using Level 3 inputs, consisting of third-party appraisals or price opinions and internal adjustments necessary in the judgment of Management to reflect current market conditions and current operating results for the specific collateral. Subsequent to foreclosure, valuations are updated periodically, and the assets may be written down further through a charge to noninterest expense.
Mortgage Servicing Rights. The Corporation carries its MSRs at lower of cost or fair value, and, therefore, they subject to fair value measurements on a nonrecurring basis. Since sales of MSRs tend to occur in private transactions and the precise terms and conditions of the sales are typically not readily available, there is a limited market to refer to in determining the fair value of MSRs. As such, like other participants in the mortgage banking business, the Corporation relies primarily on a discounted cash flow model, incorporating assumptions about loan prepayment rates, discount rates, servicing costs and other economic factors, to estimate the fair value of its mortgage servicing rights. Since the valuation model uses significant unobservable inputs, the Corporation classifies MSRs within Level 3.
The Corporation utilizes a third-party vendor to perform the modeling to estimate the fair value of its MSRs. The Corporation reviews the estimated fair values and assumptions used by the third-party in the model on a quarterly basis. The Corporation also compares the estimates of fair value and assumptions to recent market activity and against its own experience. See Note 11 (Mortgage Servicing Rights and Mortgage Servicing Activity) for further information on MSRs valuation assumptions.
Derivatives. The Corporation's derivatives include interest rate swaps and written loan commitments and forward sales contracts related to residential mortgage loan origination activity. Valuations for interest rate swaps are derived from third-party models whose significant inputs are readily observable market parameters, primarily yield curves, with appropriate adjustments for liquidity and credit risk. These fair value measurements are classified as Level 2. The fair values of written loan commitments and forward sales contracts on the associated loans are based on quoted prices for similar loans in the secondary market, consistent with the valuation of residential mortgage loans held for sale. Expected net future cash flows related to loan servicing activities are included in the fair value measurement of written loan commitments. A written loan commitment does not bind the potential borrower to entering into the loan, nor does it guarantee that the Corporation will approve the potential borrower for the loan. Therefore, when determining fair value, the Corporation makes estimates of expected "fallout" (interest rate locked pipeline loans not expected to close), using models, which consider cumulative historical fallout rates and other factors. Fallout can occur for a variety of reasons including falling rate environments when a borrower will abandon a fixed rate loan commitment at one lender and enter into a new lower fixed rate loan commitment at another, when a borrower is not approved as an acceptable credit by the lender or for a variety of other non-economic reasons. Fallout is not a significant input to the fair value of the written loan commitments in their entirety. These measurements are classified as Level 2.
Derivative assets are typically secured through securities with financial counterparties or cross collateralization with a borrowing customer. Derivative liabilities are typically secured through the Corporation pledging securities to financial counterparties or, in the case of a borrowing customer, by the right of setoff. The Corporation considers factors such as the likelihood of default by itself and its counterparties, right of setoff, and remaining maturities in determining the appropriate fair value adjustments. All derivative counterparties approved by the Corporation's Asset and Liability Committee are regularly reviewed, and appropriate business action is taken to adjust the exposure to certain counterparties, as necessary. Counterparty exposure is evaluated by netting positions that are subject to master netting agreements, as well as considering the amount of marketable collateral securing the position. This approach used to estimate impacted exposures to counterparties is also used by the Corporation to estimate its own credit risk on derivative liability positions. To date, no material losses have been incurred due to a counterparty's inability to pay any uncollateralized position. There was no significant change in value of derivative assets and liabilities attributed to credit risk for the three months ended September 30, 2014.
True-up liability. In connection with the George Washington and Midwest acquisitions in 2010, the Bank has agreed to pay the FDIC should the estimated losses on the acquired loan portfolios as well as servicing fees earned on the acquired loan portfolios not meet thresholds as stated in the loss sharing agreements (the "true-up liability"). This contingent consideration is classified as a liability within accrued taxes, expenses and other liabilities on the consolidated balance sheets and is remeasured at fair value each reporting date until the contingency is resolved. The changes in fair value are recognized in earnings in the current period.
An expected value methodology is used as a starting point for determining the fair value of the true-up liability based on the contractual terms prescribed in the loss sharing agreements. The resulting values under both calculations are discounted over 10 years (the period defined in the loss sharing agreements) to reflect the uncertainty in the timing and payment of the true-up liability by the Bank to arrive at a net present value. The discount rate used to value the true-up liability was 3.31% and 3.59% as of September 30, 2014 and 2013, respectively. Increasing or decreasing the discount rate by one percentage point would change the liability by approximately $0.7 million and $0.7 million, respectively, as of September 30, 2014.
In accordance with the loss sharing agreements governing the Midwest acquisition, on July 15, 2020 (the “Midwest True-Up Measurement Date”), the Bank has agreed to pay to the FDIC half of the amount, if positive, calculated as: (1) 20% of the intrinsic loss estimate of the FDIC (approximately $152 million); minus (2) the sum of (A) 25% of the asset premium paid in connection with the Midwest acquisition (approximately $21 million); plus (B) 25% of the cumulative shared-loss payments (as defined below) plus (C) the cumulative servicing amount (as defined below). The fair value of the true-up liability associated with the Midwest acquisition was $8.0 million, $7.1 million, and $7.3 million as of September 30, 2014, December 31, 2013, and September 30, 2013, respectively.
In accordance with the loss sharing agreements governing the George Washington acquisition, on April 14, 2020 (the “George Washington True-Up Measurement Date”), the Bank has agreed to pay to the FDIC 50% of the excess, if any, of (1) 20% of the stated threshold (approximately $34.4 million) less (2) the sum of (A) 25% of the asset discount (approximately $12 million) received in connection with the George Washington acquisition plus (B) 25% of the cumulative shared-loss payments (as defined below) plus (C) the cumulative servicing amount (as defined below). The fair value of the true-up liability associated with the George Washington acquisition was $4.8 million, $4.3 million, and $4.2 million as of September 30, 2014, December 31, 2013, and September 30, 2013, respectively.
For the purposes of the above calculations, cumulative shared-loss payments means: (i) the aggregate of all of the payments made or payable to the Bank under the loss sharing agreements minus (ii) the aggregate of all of the payments made or payable to the FDIC. The cumulative servicing amount means the period servicing amounts (as defined in the loss sharing agreements) for every consecutive twelve-month period prior to and ending on the Midwest and George Washington True-Up Measurement Dates. The cumulative loss share payments and cumulative service amounts components of the true-up calculations are estimated each period end based on the expected amount and timing of cash flows of the acquired loan portfolios. See Note 3 (Loans) and Note 4 (Allowance for Loan Losses) for additional information on the estimated cash flows of the acquired loan portfolios.
The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the three and nine months ended September 30, 2014 and 2013 are summarized as follows:
	Three Months Ended September 30,										Nine Months Ended September 30,
	2014					2013					2014					2013
(In thousands)	Available-for-sale securities			True-up liability		Available-for-sale securities			True-up liability		Available-for-sale securities			True-up liability		Available-for-sale securities			True-up liability
Balance at beginning of period	$	350,733		$	12,581	$	212,512		$	10,937	$	347,610		$	11,463	$	49,661		$	12,259
Fair value of assets acquired	—			—		—			—		—			—		3,271			—
(Gains) losses included in earnings (a)	—			223		—			520		—			1,341		—			(802		)
Unrealized gains (losses) (b)	277			—		(1,704		)	—		3,298			—		(2,066		)	—
Purchases	—			—		111,941			—		—			—		271,857			—
Settlements	(3,489		)	—		13			—		(3,387		)	—		39			—
Balance at ending of period	$	347,521		$	12,804	$	322,762		$	11,457	$	347,521		$	12,804	$	322,762		$	11,457
(a) Reported in "Other expense"
(b) Reported in "Other comprehensive income (loss)"
Fair Value Option
Residential mortgage loans held for sale are recorded at fair value under fair value option accounting guidance. The election of the fair value option aligns the accounting for these loans with the related hedges. It also eliminates the requirements of the hedge accounting under GAAP.
Interest income on loans held for sale is accrued on the principal outstanding primarily using the “simple-interest” method. None of these loans were 90 days or more past due, nor were any on nonaccrual as of September 30, 2014, December 31, 2013, and September 30, 2013. The aggregate fair value, contractual balance and gain or loss on loans held for sale was as follows:
(In thousands)	September 30, 2014			December 31, 2013		September 30, 2013
Aggregate fair value carrying amount	$	19,512		$	11,622	$	17,813
Aggregate unpaid principal / contractual balance	18,937			11,438		17,179
Carrying amount over aggregate unpaid principal (a)	$	575		$	184	$	634
(a) These changes are included in "Loan sales and servicing income" in the Consolidated Statements of Income.
Disclosures about Fair Value of Financial Instruments
The carrying amount and estimated fair value of the Corporation’s financial instruments that are carried at either fair value or cost as of September 30, 2014, December 31, 2013, and September 30, 2013 are shown in the tables below.
	September 30, 2014
	Carrying			Fair Value
(In thousands)	Amount			Total		Level 1			Level 2		Level 3
Financial assets:
Cash and cash equivalents	$	485,328		$	485,328	$	485,328		$	—	$	—
Available-for-sale securities	3,462,990			3,462,990		2,916			3,112,553		347,521
Held-to-maturity securities	3,002,262			2,947,172		—			2,947,172		—
Other securities	148,421			148,421		—			148,421		—
Loans held for sale	19,512			19,512		—			19,512		—
Net originated loans	11,980,876			11,995,816		—			—		11,995,816
Net acquired loans	2,738,898			2,869,303		—			—		2,869,303
Net covered loans and loss share receivable	382,175			382,175		—			—		382,175
Accrued interest receivable	65,736			65,736		—			65,736		—
Derivatives	43,097			43,097		—			43,097		—
Financial liabilities:
Deposits	$	19,366,911		$	19,370,624	$	—		$	19,370,624	$	—
Federal funds purchased and securities sold under agreements to repurchase	1,273,290			1,273,290		—			1,273,290		—
Wholesale borrowings	608,463			611,753		—			611,753		—
Long-term debt	249,933			259,051		—			259,051		—
Accrued interest payable	5,310			5,310		—			5,310		—
Derivatives	49,280			49,280		—			48,765		515
	December 31, 2013
	Carrying			Fair Value
(In thousands)	Amount			Total		Level 1			Level 2		Level 3
Financial assets:
Cash and cash equivalents	$	917,822		$	917,822	$	917,822		$	—	$	—
Available-for-sale securities	3,273,174			3,273,174		3,036			2,922,527		347,611
Held-to-maturity securities	2,935,688			2,824,240		—			2,824,240		—
Other securities	180,803			180,803		—			180,803		—
Loans held for sale	11,622			11,622		—			11,622		—
Net originated loans	10,116,903			10,017,722		—			—		10,017,722
Net acquired loans	3,494,874			3,627,275		—			—		3,627,275
Net covered loans and loss share receivable	547,943			547,943		—			—		547,943
Accrued interest receivable	52,929			52,929		—			52,929		—
Derivatives	47,902			47,902		—			47,902		—
Financial liabilities:
Deposits	$	19,533,601		$	19,532,368	$	—		$	19,532,368	$	—
Federal funds purchased and securities sold under agreements to repurchase	851,535			851,535		—			851,535		—
Wholesale borrowings	200,600			204,124		—			204,124		—
Long-term debt	324,428			319,711		—			319,711		—
Accrued interest payable	9,339			9,339		—			9,339		—
Derivatives	58,201			58,201		—			58,201		—
	September 30, 2013
	Carrying			Fair Value
(In thousands)	Amount			Total		Level 1			Level 2		Level 3
Financial assets:
Cash and cash equivalents	$	1,247,267		$	1,247,267	$	1,247,267		$	—	$	—
Available for sale securities	3,256,259			3,256,259		3,096			2,930,401		322,762
Held to maturity securities	2,749,934			2,658,433		—			2,658,433		—
Other securities	270,369			270,369		—			270,369		—
Loans held for sale	17,813			17,813		—			17,813		—
Net originated loans	9,690,848			9,623,848		—			—		9,623,848
Net acquired loans	3,817,421			3,817,421		—			—		3,817,421
Net covered loans and loss share receivable	608,732			608,732		—			—		608,732
Accrued interest receivable	49,820			49,820		—			49,820		—
Derivatives	53,839			53,839		—			53,839		—
Financial liabilities:
Deposits	$	19,489,533		$	19,508,531	$	—		$	19,508,531	$	—
Federal funds purchased and securities sold under agreements to repurchase	1,049,801			1,049,801		—			1,049,801		—
Wholesale borrowings	200,858			204,461		—			204,461		—
Long-term debt	324,425			321,255		—			321,255		—
Accrued interest payable	5,884			5,884		—			5,884		—
Derivatives	65,506			65,506		—			65,506		—
The following methods and assumptions were used to estimate the fair values of each class of financial instrument presented:
Cash and cash equivalents – Due to their short-term nature, the carrying amount of these instruments approximates the estimated fair value.
Investment securities – See Financial Instruments Measured at Fair Value above.
Loans held for sale – The majority of loans held for sale are residential mortgage loans which are recorded at fair value. All other loans held for sale are recorded at the lower of cost or market, less costs to sell. See Financial Instruments Measured at Fair Value above.
Net originated loans – The originated loan portfolio was segmented based on loan type and repricing characteristics. Carrying values are used to estimate fair values of variable rate loans. A discounted cash flow method was used to estimate the fair value of fixed-rate loans. Discounting was based on the contractual cash flows, and discount rates are based on the year-end yield curve plus a spread that reflects current pricing on loans with similar characteristics. If applicable, prepayment assumptions are factored into the fair value determination based on historical experience and current economic conditions.
Net acquired and covered loans – Fair values for acquired and covered loans were estimated based on a discounted projected cash flow methodology that considered factors including the type of loan and related collateral, classification status, fixed or variable interest rate, term of loan and whether or not the loan was amortizing, and current discount rates. Loans were grouped together according to similar characteristics and were treated in the aggregate when applying various valuation techniques. The discount rates used for loans are based on current market rates for new originations of comparable loans and include adjustments for liquidity concerns. The discount rate does not include a factor for credit losses as that has been included in the estimated cash flows.
Loss share receivable – This loss sharing asset is measured separately from the related covered assets as it is not contractually embedded in the covered assets and is not transferable with the covered assets should the Bank choose to dispose of them. Fair value was estimated using discounted projected cash flows related to the FDIC loss share agreements based on the expected reimbursements for losses and the applicable loss sharing percentages. These cash flows were discounted to reflect the uncertainty of the timing and receipt from the FDIC.
Accrued interest receivable – The carrying amount is considered a reasonable estimate of fair value.
Mortgage servicing rights – See Financial Instruments Measured at Fair Value above.
Deposits – The estimated fair value of deposits with no stated maturity, which includes demand deposits, money market accounts and other savings accounts, are established at carrying value because of the customers' ability to withdraw funds immediately. A discounted cash flow method is used to estimate the fair value of fixed rate time deposits. Discounting was based on the contractual cash flows and the current rates at which similar deposits with similar remaining maturities would be issued.
Federal funds purchased and securities sold under agreements to repurchase, wholesale borrowings and long-term debt – The carrying amount of variable rate borrowings including federal funds purchased approximates the estimated fair value. Quoted market prices or the discounted cash flow method was used to estimate the fair value of the Corporation's long-term debt. Discounting was based on the contractual cash flows and the current rate at which debt with similar terms could be issued.
Accrued interest payable – The carrying amount is considered a reasonable estimate of fair value.
Derivative assets and liabilities – See Financial Instruments Measured at Fair Value above.
True-up liability – See Financial Instruments Measured at Fair Value above.

Mortgage_Servicing_Rights_and_

Mortgage Servicing Rights and Mortgage Servicing Activity	9 Months Ended
	Sep. 30, 2014
Transfers and Servicing [Abstract]	'
Mortgage Servicing Rights and Mortgage Servicing Activity	'
	Mortgage Servicing Rights and Mortgage Servicing Activity
	In the nine months ended September 30, 2014 and 2013, the Corporation sold residential mortgage loans from the held for sale portfolio with unpaid principal balances of $257.0 million and $468.8 million, respectively, and recognized pretax gains of $5.4 million and $10.8 million, respectively, which are included as a component of loan sales and servicing income. As of September 30, 2014 and 2013, the Corporation retained the related MSRs on $228.5 million and $431.9 million, respectively, of the loans sold and receives servicing fees.
	The Corporation serviced for third parties approximately $2.6 billion of residential mortgage loans at September 30, 2014 and $2.7 billion at September 30, 2013. For the nine months ended September 30, 2014 and 2013, loan servicing fees, not including valuation changes included in loan sales and servicing income, were $4.9 million and $4.7 million, respectively.
	Servicing rights are presented within other assets on the accompanying Consolidated Balance Sheets. The retained servicing rights are initially valued at fair value. Since MSRs do not trade in an active market with readily observable prices, the Corporation relies primarily on a discounted cash flow analysis model to estimate the fair value of its MSRs. Additional information can be found in Note 10 (Fair Value Measurement). MSRs are subsequently measured using the amortization method. Accordingly, the MSRs are amortized over the period of, and in proportion to, the estimated net servicing income and is recorded in loan sales and servicing income.
	Changes in the carrying amount of MSRs and MSRs valuation allowance are as follows:
		Three Months Ended September 30,						Nine Months Ended September 30,
	(In thousands)	2014			2013			2014			2013
	Balance at beginning of period	$	22,150		$	22,604		$	22,760		$	21,316
	Addition of Citizens' MSRs on Acquisition Date	—			—			—			1,065
	Additions	1,035			1,450			2,242			4,151
	Amortization	(996		)	(1,131		)	(2,813		)	(3,609		)
	Balance at end of period	22,189			22,923			22,189			22,923
	Valuation allowance at beginning of period	(562		)	(482		)	(282		)	(2,564		)
	Recoveries (Additions)	57			(90		)	(223		)	1,992
	Valuation allowance at end of period	(505		)	(572		)	(505		)	(572		)
	MSRs, net carrying balance	$	21,684		$	22,351		$	21,684		$	22,351
	Fair value at end of period	$	22,229		$	22,616		$	22,229		$	22,616
	On a quarterly basis, the Corporation assesses its capitalized servicing rights for impairment based on their current fair value. For purposes of the impairment, the servicing rights are disaggregated based on loan type and interest rate which are the predominant risk characteristics of the underlying loans. A valuation allowance is established through a charge to earnings to the extent the amortized cost of the MSRs exceeds the estimated fair value by stratification. If it is later determined that all or a portion of the temporary impairment no longer exists for the stratification, the valuation is reduced through a recovery to earnings. No permanent impairment losses were written off against the allowance during the nine months ended September 30, 2014 and 2013.
	Key economic assumptions and the sensitivity of the current fair value of the MSRs related to immediate 10% and 25% adverse changes in those assumptions at September 30, 2014 are presented in the following table below. These sensitivities are hypothetical and should be used with caution. As the figures indicate, changes in the fair value based on 10% variation in the prepayment speed assumption generally cannot be extrapolated because the relationship of the change in the prepayment speed assumption to the change in fair value may not be linear. Also, in the below table, the effect of a variation in the discount rate assumption on the fair value of the MSRs is calculated independently without changing any other assumption. In reality, changes in one factor may result in changes in another (for example, changes in prepayment speed estimates could result in changes in the discount rates), which might magnify or counteract the sensitivities.
	Prepayment speed assumption (annual CPR)	10.88		%
	Decrease in fair value from 10% adverse change	$	753
	Decrease in fair value from 25% adverse change	$	1,813
	Discount rate assumption	9.89		%
	Decrease in fair value from 100 basis point adverse change	$	699
	Decrease in fair value from 200 basis point adverse change	$	1,352
	Expected weighted-average life (in months)	101.5

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Contingencies and Guarantees	'
	Contingencies and Guarantees
	Litigation
	In the normal course of business, the Corporation and its subsidiaries are at all times subject to pending and threatened legal actions, some for which the relief or damages sought are substantial. Although the Corporation is not able to predict the outcome of such actions, after reviewing pending and threatened actions with counsel, Management believes that based on the information currently available the outcome of such actions, individually or in the aggregate, will not have a material adverse effect on the results of operations or shareholders' equity of the Corporation. However, it is possible that the ultimate resolution of these matters, if unfavorable, may be material to the results of operations in a particular future period as the time and amount of any resolution of such actions and its relationship to the future results of operations are not known.
	Reserves are established for legal claims only when losses associated with the claims are judged to be probable, and the loss can be reasonably estimated. In many lawsuits and arbitrations, including almost all of the class action lawsuits, it is not possible to determine whether a liability will be incurred or to estimate the ultimate or minimum amount of that liability until the case is close to resolution, in which case a reserve will not be recognized until that time.
	Overdraft Litigation
	Commencing in December 2010, two separate lawsuits were filed in the Summit County Court of Common Pleas and the Lake County Court of Common Pleas against the Corporation and the Bank. The complaints were brought as putative class actions on behalf of Ohio residents who maintained a checking account at the Bank and who incurred one or more overdraft fees as a result of the alleged re-sequencing of debit transactions. The lawsuit that had been filed in Summit County Court of Common Pleas was dismissed without prejudice on July 11, 2011. The remaining suit in Lake County seeks actual damages, disgorgement of overdraft fees, punitive damages, interest, injunctive relief and attorney fees. In December 2012, the trial court issued an order certifying a proposed class and the Bank and Corporation appealed the order to the Eleventh District Court of Appeals. In September 2013, the Eleventh District Court of Appeals affirmed in part and reversed in part the trial court's class certification order, and remanded the case back to the trial court for further consideration, in particular with respect to the class definition. On October 9, 2013, the Bank and Corporation filed with the Eleventh District Court of Appeals an application for reconsideration and application for consideration en banc. On November 20, 2013, the Eleventh District denied those applications. On December 4, 2013, the Bank and Corporation filed a notice of appeal with the Ohio Supreme Court, and on January 3, 2014, they filed with the Ohio Supreme Court a memorandum in support of the Court's exercising its jurisdiction and accepting the appeal. The plaintiffs filed an opposition, and, on April 24, 2014, the Ohio Supreme Court declined to accept jurisdiction. On August 6, 2014, the Bank and Corporation filed a motion asking the trial court to stay the lawsuit pending arbitration of claims subject to an arbitration agreement. That motion has been fully briefed and is awaiting a decision by the court. On August 25, 2014, the parties stipulated to a revised class definition (without affecting the pending motion to stay), and an order approving that stipulation is awaiting court approval.
	Merger Litigation
	Between September 17, 2012 and October 5, 2012, alleged shareholders of Citizens filed six purported class action lawsuits in the Circuit Court of Genesee County, Michigan, relating to the proposed merger between Citizens and FirstMerit, which merger closed in April 2013. The lawsuits were consolidated under the caption In re Citizens Republic Bancorp, Inc. Shareholder Litigation, Case No. 12-99027-CK (the "Lawsuit"). The consolidated complaint in the Lawsuit alleges that the former directors of Citizens breached their fiduciary duties by failing to obtain the best available price in the merger and by not providing Citizens shareholders with all material information related to the merger, and that FirstMerit and Citizens aided and abetted those alleged breaches of fiduciary duty.  The Complaint sought declaratory and injunctive relief to prevent the consummation of the merger, rescissory damages and other equitable relief.
	The plaintiffs and defendants have entered into a settlement of the Lawsuit, and the court approved the settlement on September 20, 2013. Under the settlement, the defendants amended the joint proxy statement/prospectus relating to the merger to include certain supplemental disclosures to shareholders of Citizens and agreed to pay attorneys' fees and expenses as awarded by the court. An alleged former shareholder of Citizens objected to the settlement and has filed an appeal of the court's approval of the settlement; the settlement will not become final until that appeal has been resolved.
	CRBC 401(k) Litigation
	Participants in the Citizens Republic Bancorp 401(k) Plan filed a lawsuit in the United States Court for the Eastern District of Michigan in 2011, alleging that Citizens and certain of its officers and directors violated the Employee Retirement Income Security Act by offering Citizens common stock as an investment alternative in the Plan during periods when it was imprudent to do so and by failing to adequately monitor fiduciaries responsible for administering the Plan. The lawsuit, captioned Kidd v. Citizens Republic Bancorp, Inc. et al., Case No. 2:11-cv-11709, asserts claims for monetary and injunctive relief on behalf of a purported class of participants and beneficiaries in the Plan who held Citizens stock in their Plan accounts during the period from April 17, 2008 to "the present." In April 2014, the court denied the defendants' motion to dismiss the second amended complaint. The action is currently stayed pending a court-ordered mediation process.
	Based on information currently available, consultation with counsel, available insurance coverage and established reserves, Management believes that the eventual outcome of all claims against the Corporation and its subsidiaries will not, individually or in the aggregate, have a material adverse effect on its consolidated financial position or results of operations. However, it is possible that the ultimate resolution of these matters, if unfavorable, may be material to the results of operations for a particular period. The Corporation has not established any reserves with respect to any of this disclosed litigation because it is not possible to determine (i) whether a liability has been incurred; or (ii) an estimate of the ultimate or minimum amount of such liability.
	Commitments to Extend Credit
	Commitments to extend credit are agreements to lend to a customer provided there is no violation of any condition established in the contract. Loan commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans are considered derivative instruments, and the fair value of these commitments is recorded on the consolidated balance sheets. Additional information is provided in Note 8 (Derivatives and Hedging Activities). Commitments generally are extended at the then-prevailing interest rates, have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon the total commitment amounts do not necessarily represent future cash requirements. Loan commitments involve credit risk not reflected on the balance sheet. The Corporation mitigates exposure to credit risk with internal controls that guide how applications for credit are reviewed and approved, how credit limits are established and, when necessary, how demands for collateral are made. Collateral held varies but may include accounts receivable, inventory, property, plant and equipment, and income-producing commercial properties. Management evaluates the creditworthiness of each prospective borrower on a case-by-case basis and, when appropriate, adjusts the allowance for probable credit losses inherent in all commitments. The reserve for unfunded lending commitments at September 30, 2014, December 31, 2013, and September 30, 2013 was $7.0 million, $7.9 million and $8.5 million, respectively. Additional information pertaining to this allowance is included in Note 4 (Allowance for Loan Losses) and under the heading "Allowance for Loan Losses and Reserve for Unfunded Lending Commitments" within Management's Discussion and Analysis of Financial Condition and Results of Operation of this report.
	The following table shows the remaining contractual amount of each class of commitments to extend credit as of September 30, 2014, December 31, 2013, and September 30, 2013. This amount represents the Corporation's maximum exposure to loss if the customer were to draw upon the full amount of the commitment and subsequently default on payment for the total amount of the then outstanding loan.
	Loan commitments
	(In thousands)		September 30, 2014			December 31, 2013			September 30, 2013
		Commercial	$	3,640,755		$	3,367,625		$	3,521,227
		Consumer	2,361,476			2,179,010			2,057,115
		Total loan commitments	$	6,002,231		$	5,546,635		$	5,578,342
	Guarantees
	The Corporation is a guarantor in certain agreements with third parties. The following table shows the types of guarantees the Corporation had outstanding as of September 30, 2014, December 31, 2013, and September 30, 2013.
	Financial guarantees
	(In thousands)		September 30, 2014			December 31, 2013			September 30, 2013
		Standby letters of credit	$	227,835		$	196,400		$	200,835
		Loans sold with recourse	43,260			45,082			50,882
		Total financial guarantees	$	271,095		$	241,482		$	251,717
	Standby letters of credit obligate the Corporation to pay a specified third party when a customer fails to repay an outstanding loan or debt instrument, or fails to perform some contractual nonfinancial obligation. The credit risk involved in issuing letters of credit is essentially the same as involved in extending loan facilities to customers. Collateral held varies, but may include marketable securities, equipment and real estate. Any amounts drawn under standby letters of credit are treated as loans; they bear interest and pose the same credit risk to the Corporation as a loan. Except for short-term guarantees of $142.3 million at September 30, 2014, the remaining guarantees extend in varying amounts through 2019.
	Asset Sales
	The Corporation regularly sells service retained residential mortgage loans to GSEs as part of its mortgage banking activities. The Corporation provides customary representation and warranties to the GSEs in conjunction with these sales. These representations and warranties generally require the Corporation to repurchase assets if it is subsequently determined that a loan did not meet specified criteria, such as a documentation deficiency or rescission of mortgage insurance. If the Corporation is unable to cure or refute a repurchase request, the Corporation is generally obligated to repurchase the loan or otherwise reimburse the counterparty for losses. The Corporation also sells residential mortgage loans serviced released to other investors which contain early payment default recourse provisions. As of September 30, 2014, December 31, 2013, and September 30, 2013, the Corporation had sold $33.0 million, $34.6 million, and $38.2 million, respectively, of outstanding residential mortgage loans to GSEs and other investors with recourse provisions. The Corporation had reserved $7.6 million, $8.7 million, and $7.9 million as of September 30, 2014, December 31, 2013, and September 30, 2013, respectively, for potential losses from representation and warranty obligations and early payment default recourse provisions.
	Due to prior acquisitions, as of September 30, 2014, the Corporation continued to service approximately $6.4 million in manufactured housing loans that were sold with recourse. As of September 30, 2014, the Corporation had reserved $1.1 million for potential losses from these manufactured housing loans, consistent with the reserve balance at December 31, 2013 and September 30, 2013.
	The total reserve associated with loans sold with recourse was approximately $8.7 million, $9.9 million, and $9.0 million as of September 30, 2014, December 31, 2013, and September 30, 2013, respectively, and is included in accrued taxes, expenses and other liabilities on the Consolidated Balance Sheets. The Corporation's reserve reflects Management's best estimate of losses. The Corporation's reserving methodology uses current information about investor repurchase requests, and assumptions about repurchase mix and loss severity, based upon the Corporation's most recent loss trends. The Corporation also considers qualitative factors that may result in anticipated losses differing from historical loss trends, such as loan vintage, underwriting characteristics and macroeconomic trends.
	Changes in the amount of the repurchase reserve for the three and nine months ended September 30, 2014 and 2013 are as follows:
		Three Months Ended September 30, 2014
	(In thousands)	Reserve on residential mortgage loans			Reserve on manufactured housing loans			Total repurchase reserve
	Balance at beginning of period	$	7,900		$	1,122		$	9,022
	Net realized losses	(600		)	—			(600		)
	Net increase (decrease) to reserve	250			—			250
	Balance at end of period	$	7,550		$	1,122		$	8,672
		Three Months Ended September 30, 2013
	(In thousands)	Reserve on residential mortgage loans			Reserve on manufactured housing loans			Total repurchased reserve
	Balance at beginning of period	$	7,287		$	1,106		$	8,393
	Assumed obligation	—			—			—
	Net realized losses	(1,983		)	—			(1,983		)
	Net increase (decrease) to reserve	2,546			3			2,549
	Balance at end of period	$	7,850		$	1,109		$	8,959
		Nine Months Ended September 30, 2014
	(In thousands)	Reserve on residential mortgage loans			Reserve on manufactured housing loans			Total repurchase reserve
	Balance at beginning of period	$	8,737		$	1,114		$	9,851
	Net realized losses	(3,357		)	—			(3,357		)
	Net increase (decrease) to reserve	2,170			8			2,178
	Balance at end of period	$	7,550		$	1,122		$	8,672
		Nine Months Ended September 30, 2013
	(In thousands)	Reserve on residential mortgage loans			Reserve on manufactured housing loans			Total repurchase reserve
	Balance at beginning of period	$	1,500		$	1,167		$	2,667
	Assumed obligation	6,000			—			6,000
	Net realized losses	(3,053		)	—			(3,053		)
	Net increase (decrease) to reserve	3,403			(58		)	3,345
	Balance at end of period	$	7,850		$	1,109		$	8,959

Changes_and_Reclassifications_

Changes and Reclassifications Out of Accumulated Other Comprehensive Income (Notes)	9 Months Ended
	Sep. 30, 2014
Changes and Reclassifications Out of Other Comprehensive Income [Abstract]	'
Comprehensive Income (Loss) Note	'
	Changes and Reclassifications Out of Accumulated Other Comprehensive Income
	The following table presents the changes in AOCI by component of comprehensive income for the three and nine months ended September 30, 2014 and 2013:
		Three Months Ended September 30, 2014											Nine Months Ended September 30, 2014
	(In thousands)	Pretax				Tax				After tax			Pretax			Tax			After tax
	Unrealized and realized securities gains and losses:
	Balance at the beginning of the period	$	(5,696	)		$	(1,994	)		$	(3,702	)	$	(45,072	)	$	(15,775	)	$	(29,297	)
	Changes in unrealized securities' holding gains/(losses)	(16,207		)		(5,672		)		(10,535		)	24,293			8,503			15,790
	Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity	(563		)		(197		)		(366		)	(1,551		)	(543		)	(1,008		)
	Net losses/(gains) realized on sale of securities reclassified to noninterest income	(14		)		(5		)		(9		)	(150		)	(53		)	(97		)
	Balance at the end of the period	(22,480		)		(7,868		)		(14,612		)	(22,480		)	(7,868		)	(14,612		)
	Pension plans and other postretirement benefits:
	Balance at the beginning and end of the period	(55,084		)		(19,279		)		(35,805		)	(57,812		)	(20,233		)	(37,579		)
	Current year actual losses (gains)	—				—				—			—			—			—
	Amortization of actuarial gain	768				269				499			2,398			839			1,559
	Amortization of prior service cost reclassified to other noninterest expense	516				181				335			1,614			565			1,049
	Balance at the end of the period	(53,800		)		(18,829		)		(34,971		)	(53,800		)	(18,829		)	(34,971		)
	Total Accumulated Other Comprehensive Income	$	(76,280	)		$	(26,697	)		$	(49,583	)	$	(76,280	)	$	(26,697	)	$	(49,583	)
		Three Months Ended September 30, 2013											Nine Months Ended September 30, 2013
	(In thousands)	Pretax				Tax				After tax			Pretax			Tax			After tax
	Unrealized and realized securities gains and losses:
	Balance at the beginning of the period	$	(420	)		$	(146	)		$	(274	)	$	85,259		$	29,841		$	55,418
	Changes in unrealized securities' holding gains/(losses)	(17,491		)		(6,123		)		(11,368		)	(104,853		)	(36,699		)	(68,154		)
	Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity	(534		)		(187		)		(347		)	(1,654		)	(579		)	(1,075		)
	Net losses/(gains) realized on sale of securities reclassified to noninterest income	(1		)		—				(1		)	2,802			981			1,821
	Balance at the end of the period	(18,446		)		(6,456		)		(11,990		)	(18,446		)	(6,456		)	(11,990		)
	Pension plans and other postretirement benefits:
	Balance at the beginning and end of the period	(110,188		)		(38,565		)		(71,623		)	(110,188		)	(38,565		)	(71,623		)
	Current year actual losses (gains)	—				—				—			—			—			—
	Amortization of actuarial gain	—				—				—			—			—			—
	Amortization of prior service cost reclassified to other noninterest expense	—				—				—			—			—			—
	Balance at the end of the period	(110,188		)		(38,565		)		(71,623		)	(110,188		)	(38,565		)	(71,623		)
	Total Accumulated Other Comprehensive Income	$	(128,634	)		$	(45,021	)		$	(83,613	)	$	(128,634	)	$	(45,021	)	$	(83,613	)
	The following table presents current period reclassifications out of AOCI by component of comprehensive income for the three and nine months ended September 30, 2014 and 2013:
	(In thousands)		Three Months Ended September 30, 2014				Nine Months Ended September 30, 2014				Income statement line item presentation
	Realized (gains)/losses on sale of securities		$	(14	)		$	(150	)		Investment securities losses (gains), net
	Tax expense (benefit) (35%)		(5		)		(53		)		Income tax expense (benefit)
	Reclassified amount, net of tax		$	(9	)		$	(97	)
	(In thousands)		Three Months Ended September 30, 2013				Nine Months Ended September 30, 2013				Income statement line item presentation
	Realized (gains)/losses on sale of securities		$	(1	)		$	2,802			Investment securities losses (gains), net
	Tax expense (benefit) (35%)		—				981				Income tax expense (benefit)
	Reclassified amount, net of tax		$	(1	)		$	1,821

Subsequent_Events_unaudited

Subsequent Events (unaudited)	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	Subsequent Events
	In preparing these financial statements, subsequent events were evaluated through the time the financial statements were issued. Financial statements are considered issued when they are widely distributed to all shareholders and other financial statement users, or filed with the SEC. In accordance with applicable accounting standards, all material subsequent events have been either recognized in the financial statements or disclosed in the notes to the financial statements.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Investment policy on municipal securities [Policy Text Block]	'
	The Corporation's investment policy states that municipal securities purchased are to be investment grade and allows for a 20% maximum portfolio concentration in municipal securities with a combined individual state to total municipal outstanding equal to or less than 25%.
New Accounting Pronouncements and Changes in Accounting Principles	'
	Recently Adopted Accounting Standards
	FASB ASU 2014-01, Accounting for Investments in Qualified Affordable Housing Projects. The amendments in ASU 2014-01 do not change the existing accounting methods, but permit reporting entities to make an accounting policy election to account for their investments in qualified affordable projects using the proportional amortization method, if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The amendments in ASU 2014-01 are effective for annual periods and interim reporting periods within those annual periods, beginning after December 15, 2014, and should be applied retrospectively to all periods presented. The Corporation early adopted ASU 2014-01 in the first quarter of 2014. Amortization of the initial investment cost of qualifying projects is now recorded in the provision for income taxes together with the tax credits and benefits received. Previously, the amortization was recorded as other noninterest expense. All prior period amounts have been restated to reflect the adoption of the amendment, which resulted in an offsetting decrease to other noninterest expense and increase to the provision for income taxes of approximately $0.8 million and $2.3 million for the three and nine months ended September 30, 2013, respectively.
	Recently Issued Accounting Standards
	FASB ASU 2014-14, Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure—a consensus of the FASB Emerging Issues Task Force. The objective of this update is to reduce diversity in practice by addressing the classification of certain foreclosed mortgage loans held by creditors that are either fully or partially guaranteed under government programs. The amendments in this update require that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if the
	following conditions are met: 1) the loan has a government guarantee that is not separable from the
	loan before foreclosure; 2) at the time of foreclosure, the creditor has the intent to convey the real
	estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim; and 3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The ASU is effective for interim and annual periods beginning after December 15, 2014. The amendments can be adopted using either a prospective transition method or a modified retrospective transition method. The adoption of this accounting guidance is not expected to have a material effect on the Corporation's financial position or results of operations.
	FASB ASU 2014–12, Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved After the Requisite Service Period — a consensus of the FASB Emerging Issues Task Force. The amendments in this update clarify that entities should treat performance targets that can be met after the requisite service period of a share-based payment award as performance conditions that affect vesting. Therefore, an entity would not record compensation expense (measured as of the grant date without taking into account the effect of the performance target) related to an award for which transfer to the employee is contingent on the entity’s satisfaction of a performance target until it becomes probable that the performance target will be met. The ASU does not contain any new disclosure requirements. The ASU is effective for interim and annual reporting periods beginning after December 15, 2015. Early adoption is permitted. In addition, entities will have the option of applying the guidance either prospectively (i.e., only to awards granted or modified on or after the effective date) or retrospectively. Retrospective application would only apply to awards with performance targets outstanding at or after the beginning of the first annual period presented (i.e., the earliest presented comparative period). The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements.
	FASB ASU 2014-11, Transfers and Servicing: Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. The amendments in this update require entities to account for repurchase-to-maturity transactions as secured borrowings (rather than as sales with forward repurchase agreements), eliminate accounting guidance on linking repurchase financing transactions, and expand disclosure requirements related to certain transfers of financial assets that are accounted for as sales and certain transfers, such as repos, securities lending transactions, and repurchase-to-maturity transactions, accounted for as secured borrowings. The amendments in ASU 2014-11 are effective for the first interim or annual period beginning after December 15, 2014. The amendments must present changes in accounting for transactions outstanding on the effective date as a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. Early application is prohibited. The adoption of this accounting guidance is not expected to have a material effect on the Corporation's financial position or results of operations.
	FASB ASU 2014-09, Revenue from Contracts with Customers. The amendments in this update supersede virtually all existing GAAP revenue recognition guidance, including most industry-specific revenue recognition guidance. ASU 2014-09 creates a single, principle-based revenue recognition framework and will require entities to apply significantly more judgment and expanded disclosures surrounding revenue recognition. The core principle requires an entity to recognize revenue in a manner that depicts the transfer of goods or services to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 applies to contracts with customers to provide goods and services, with certain exclusions such as lease contracts, financing arrangements, and financial instruments. The amendments in ASU 2014-09 are effective for fiscal years beginning after December 15, 2016. The amendments can be adopted using either the full retrospective approach or a modified retrospective approach. Early adoption is prohibited. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements.
	FASB ASU 2014-08, Presentation of Financial Statements and Property, Plant, and Equipment: Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. The amendments in this update change the definition of a discontinued operation in ASC 205-20 and require additional disclosures for transactions that meet the definition of a discontinued operation and certain other significant transactions that do not meet the discontinued operations criteria. The amendments in ASU 2014-08 are effective prospectively for all disposals, except disposals classified as held for sale before the adoption date or components initially classified as held for sale in periods beginning on or after December 15, 2014, with early adoption permitted. The adoption of this accounting guidance is not expected to have a material effect on the Corporation's financial position or results of operations.
	FASB ASU 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. ASU 2014-04 amends the guidance in ASC 310-40 by clarifying when an in-substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan. Additionally, the amendments require interim and annual disclosure of both 1) the amount of foreclosed residential real estate property held by the creditor and 2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The amendments in ASU 2014-04 are effective for annual periods, and interim period within those annual periods, beginning after December 15, 2014. The amendments can either be adopted using a modified retrospective or a prospective transition method. The adoption of this accounting guidance is not expected to have a material effect on the Corporation's financial position or results of operations.

Investment_Securities_Tables

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Investment [Text Block]	'
	(Dollars in thousands)		U.S. Government agency debentures				U.S. Treasuries				U.S. States and political subdivisions obligations				Residential mortgage-backed securities - U.S. govt. agency obligations				Commercial mortgage-backed securities - U.S. govt. agency obligations				Residential collateralized mortgage obligations - U.S. govt. agency obligations				Residential collateralized mortgage obligations - non- U.S. govt. agency issued				Commercial collateralized mortgage obligations - U.S. govt. agency obligations			Collateralized loan obligations			Corporate debt securities			Total			Weighted Average Yield
	Securities Available for Sale
	Remaining maturity:
	One year or less		$	—			$	—			$	12,583			$	2,969			$	16,749			$	9,163			$	—			$	—		$	7,501		$	—		$	48,965		3.59	%
	Over one year through five years		—				—				66,352				820,635				35,549				1,561,512				7				154,809			—			—			2,638,864			2.22	%
	Over five years through ten years		—				—				126,235				172,783				32,466				29,642				—				39,208			282,920			—			683,254			3.17	%
	Over ten years		—				—				31,897				—				—				—				—				—			—			54,594			86,491			2.02	%
	Fair Value		$	—			$	—			$	237,067			$	996,387			$	84,764			$	1,600,317			$	7			$	194,017		$	290,421		$	54,594		$	3,457,574		2.42	%
	Amortized Cost		$	—			$	—			$	229,528			$	983,038			$	86,485			$	1,635,780			$	7			$	195,512		$	297,389		$	61,638		$	3,489,377
	Weighted-Average Yield		—		%		—		%		5.23		%		2.63		%		2.12		%		1.98		%		3.48		%		1.97		%	2.61		%	0.95		%	2.42		%
	Weighted-Average Maturity		—				—				6.2				3.98				3.95				3.82				1.99				3.69			6.06			13.06			4.37
	Securities Held to Maturity
	Remaining maturity:
	One year or less		$	—			$	5,003			$	84,201			$	—			$	6,194			$	—			$	—			$	—		$	—		$	—		$	95,398		1.7	%
	Over one year through five years		—				—				68,480				478,503				14,874				1,312,389				—				159,582			—			91,776			2,125,604			1.85	%
	Over five years through ten years		24,244				—				200,709				122,333				43,988				46,838				—				90,630			—			—			528,742			2.9	%
	Over ten years		—				—				197,428				—				—				—				—				—			—			—			197,428			5.47	%
	Fair Value		$	24,244			$	5,003			$	550,818			$	600,836			$	65,056			$	1,359,227			$	—			$	250,212		$	—		$	91,776		$	2,947,172		2.27	%
	Amortized Cost		$	25,000			$	5,000			$	539,014			$	602,220			$	65,704			$	1,415,421			$	—			$	258,436		$	—		$	91,467		$	3,002,262
	Weighted-Average Yield		1.43		%		0.25		%		4.7		%		2.15		%		2.08		%		1.6		%		—		%		2.28		%	—		%	2.22		%	2.27		%
	Weighted-Average Maturity		5.08				0.33				9.65				4.61				4.92				4.1				—				4.78			—			3.28			4.95
Investments Classified by Contractual Maturity Date [Table Text Block]	'
	(Dollars in thousands)		U.S. Government agency debentures				U.S. Treasuries				U.S. States and political subdivisions obligations				Residential mortgage-backed securities - U.S. govt. agency obligations				Commercial mortgage-backed securities - U.S. govt. agency obligations				Residential collateralized mortgage obligations - U.S. govt. agency obligations				Residential collateralized mortgage obligations - non- U.S. govt. agency issued				Commercial collateralized mortgage obligations - U.S. govt. agency obligations			Collateralized loan obligations			Corporate debt securities			Total			Weighted Average Yield
	Securities Available for Sale
	Remaining maturity:
	One year or less		$	—			$	—			$	12,583			$	2,969			$	16,749			$	9,163			$	—			$	—		$	7,501		$	—		$	48,965		3.59	%
	Over one year through five years		—				—				66,352				820,635				35,549				1,561,512				7				154,809			—			—			2,638,864			2.22	%
	Over five years through ten years		—				—				126,235				172,783				32,466				29,642				—				39,208			282,920			—			683,254			3.17	%
	Over ten years		—				—				31,897				—				—				—				—				—			—			54,594			86,491			2.02	%
	Fair Value		$	—			$	—			$	237,067			$	996,387			$	84,764			$	1,600,317			$	7			$	194,017		$	290,421		$	54,594		$	3,457,574		2.42	%
	Amortized Cost		$	—			$	—			$	229,528			$	983,038			$	86,485			$	1,635,780			$	7			$	195,512		$	297,389		$	61,638		$	3,489,377
	Weighted-Average Yield		—		%		—		%		5.23		%		2.63		%		2.12		%		1.98		%		3.48		%		1.97		%	2.61		%	0.95		%	2.42		%
	Weighted-Average Maturity		—				—				6.2				3.98				3.95				3.82				1.99				3.69			6.06			13.06			4.37
	Securities Held to Maturity
	Remaining maturity:
	One year or less		$	—			$	5,003			$	84,201			$	—			$	6,194			$	—			$	—			$	—		$	—		$	—		$	95,398		1.7	%
	Over one year through five years		—				—				68,480				478,503				14,874				1,312,389				—				159,582			—			91,776			2,125,604			1.85	%
	Over five years through ten years		24,244				—				200,709				122,333				43,988				46,838				—				90,630			—			—			528,742			2.9	%
	Over ten years		—				—				197,428				—				—				—				—				—			—			—			197,428			5.47	%
	Fair Value		$	24,244			$	5,003			$	550,818			$	600,836			$	65,056			$	1,359,227			$	—			$	250,212		$	—		$	91,776		$	2,947,172		2.27	%
	Amortized Cost		$	25,000			$	5,000			$	539,014			$	602,220			$	65,704			$	1,415,421			$	—			$	258,436		$	—		$	91,467		$	3,002,262
	Weighted-Average Yield		1.43		%		0.25		%		4.7		%		2.15		%		2.08		%		1.6		%		—		%		2.28		%	—		%	2.22		%	2.27		%
	Weighted-Average Maturity		5.08				0.33				9.65				4.61				4.92				4.1				—				4.78			—			3.28			4.95
Amortized cost and fair value for the major categories of held-to-maturity and available-for-sale securities	'
	The following tables provide the amortized cost and fair value for the major categories of held-to-maturity and available-for-sale securities. Held-to-maturity securities are carried at amortized cost, which reflects historical cost, adjusted for amortization of premiums and accretion of discounts. Available-for-sale securities are carried at fair value with net unrealized gains or losses reported on an after tax basis as a component of OCI in shareholders' equity.
			September 30, 2014
	(In thousands)		Amortized				Gross Unrealized Gains				Gross Unrealized Losses				Fair
			Cost												Value
	Securities available-for-sale
	Debt securities
		U.S. states and political subdivisions	$	229,528			$	8,146			$	(607	)		$	237,067
		Residential mortgage-backed securities:
		U.S. government agencies	983,038				20,395				(7,046		)		996,387
		Commercial mortgage-backed securities:
		U.S. government agencies	86,485				167				(1,888		)		84,764
		Residential collateralized mortgage-backed securities:
		U.S. government agencies	1,635,780				3,512				(38,975		)		1,600,317
		Non-agency	7				—				—				7
		Commercial collateralized mortgage-backed securities:
		U.S. government agencies	195,512				298				(1,793		)		194,017
		Asset-backed securities:
		Collateralized loan obligations	297,389				289				(7,257		)		290,421
		Corporate debt securities	61,638				—				(7,044		)		54,594
		Total debt securities	3,489,377				32,807				(64,610		)		3,457,574
	Equity securities
		Marketable equity securities	2,916				—				—				2,916
		Non-marketable equity securities	2,500				—				—				2,500
		Total equity securities	5,416				—				—				5,416
		Total securities available for sale	$	3,494,793			$	32,807			$	(64,610	)		$	3,462,990
	Securities held-to-maturity
	Debt securities
		U.S. treasuries	$	5,000			$	3			$	—			$	5,003
		U.S. government agency debentures	25,000				—				(756		)		24,244
		U.S. states and political subdivisions	539,014				12,256				(452		)		550,818
		Residential mortgage-backed securities:
		U.S. government agencies	602,220				4,608				(5,992		)		600,836
		Commercial mortgage-backed securities:
		U.S. government agencies	65,704				28				(676		)		65,056
		Residential collateralized mortgage-backed securities:
		U.S. government agencies	1,415,421				66				(56,260		)		1,359,227
		Commercial collateralized mortgage-backed securities:
		U.S. government agencies	258,436				346				(8,570		)		250,212
		Corporate debt securities	91,467				489				(180		)		91,776
		Total securities held to maturity	$	3,002,262			$	17,796			$	(72,886	)		$	2,947,172
			December 31, 2013
	(In thousands)		Amortized				Gross Unrealized Gains				Gross Unrealized Losses				Fair
			Cost												Value
	Securities available-for-sale
	Debt securities
		U.S. states and political subdivisions	$	258,787			$	7,376			$	(3,796	)		$	262,367
		Residential mortgage-backed securities:
		U.S. government agencies	962,687				21,662				(14,427		)		969,922
		Commercial mortgage-backed securities:
		U.S. government agencies	72,048				7				(2,488		)		69,567
		Residential collateralized mortgage-backed securities:
		U.S. government agencies	1,566,262				4,199				(52,068		)		1,518,393
		Non-agency	9				—				—				9
		Commercial collateralized mortgage-backed securities:
		U.S. government agencies	104,152				273				(2,157		)		102,268
		Asset-backed securities:
		Collateralized loan obligations	297,259				760				(4,332		)		293,687
		Corporate debt securities	61,596				—				(10,952		)		50,644
		Total debt securities	3,322,800				34,277				(90,220		)		3,266,857
	Equity securities
		Marketable equity securities	3,036				—				—				3,036
		Non-marketable equity securities	3,281				—				—				3,281
		Total equity securities	6,317				—				—				6,317
	Total securities available for sale	$	3,329,117			$	34,277			$	(90,220	)		$	3,273,174
Securities held-to-maturity
Debt securities
	U.S. Treasuries	$	5,000			$	4			$	—			$	5,004
	U.S. government agencies debentures	25,000				—				(1,348		)		23,652
	U.S. states and political subdivisions	480,703				5,335				(10,459		)		475,579
	Residential mortgage-backed securities:
	U.S. government agencies	569,960				1,108				(11,617		)		559,451
	Commercial mortgage-backed securities:
	U.S. government agencies	56,596				—				(1,190		)		55,406
	Residential collateralized mortgage-backed securities:
	U.S. government agencies	1,464,732				—				(81,818		)		1,382,914
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies	240,069				6				(11,052		)		229,023
	Corporate debt securities	93,628				308				(725		)		93,211
	Total securities held to maturity	$	2,935,688			$	6,761			$	(118,209	)		$	2,824,240
		September 30, 2013
(In thousands)		Amortized				Gross Unrealized Gains				Gross Unrealized Losses				Fair
		Cost												Value
Securities available-for-sale
Debt securities
	U.S. states and political subdivisions	$	267,470			$	8,249			$	(3,495	)		$	272,224
	Residential mortgage-backed securities:
	U.S. government agencies	983,255				26,155				(10,035		)		999,375
	Commercial mortgage-backed securities:
	U.S. government agencies	58,129				23				(2,220		)		55,932
	Residential collateralized mortgage-backed securities:
	U.S. government agencies	1,538,991				5,710				(38,995		)		1,505,706
	Non-agency	9				—				—				9
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies	98,440				404				(1,690		)		97,154
	Asset-backed securities:
	Collateralized loan obligations	271,856				71				(3,295		)		268,632
	Corporate debt securities	61,582				—				(10,732		)		50,850
	Total debt securities	3,279,732				40,612				(70,462		)		3,249,882
Equity Securities
	Marketable equity securities	3,096				—				—				3,096
	Non-marketable equity securities	3,281				—				—				3,281
	Total equity securities	6,377				—				—				6,377
	Total securities available for sale	$	3,286,109			$	40,612			$	(70,462	)		$	3,256,259
Securities held-to-maturity
Debt securities
	U.S. treasuries	$	5,000			$	5			$	—			$	5,005
	U.S. government agency debentures	25,000				—				(1,136		)		23,864
	U.S states and political subdivisions	453,230				5,093				(9,257		)		449,066
	Residential mortgage-backed securities:
	U.S. government agencies	377,980				1,068				(8,578		)		370,470
	Commercial mortgage-backed securities:
	U.S. government agencies	50,179				12				(1,025		)		49,166
	Residential collateralized mortgage-backed securities:
	U.S. government agencies	1,523,792				179				(68,719		)		1,455,252
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies	220,410				—				(8,936		)		211,474
	Corporate debt securities	94,343				294				(501		)		94,136
	Total securities held to maturity	$	2,749,934			$	6,651			$	(98,152	)		$	2,658,433
Schedule of general obligation bonds	'
	The Corporation's U.S. states and political subdivisions portfolio is composed of general obligation bonds issued by a highly diversified number of states, cities, counties, and school districts. The amortized cost and fair value of the Corporation's portfolio of general obligation bonds are summarized by U.S. state in the tables below. As illustrated in the tables below, the aggregate fair value of the Corporation's general obligation bonds was greater than $10.0 million in eleven of the thirty-seven U.S. states in which it holds investments.
	(Dollars in thousands)	September 30, 2014
	U.S. State	# of Issuers			Average Issue Size, Fair Value				Amortized Cost				Fair Value
	Ohio	149			$	1,066			$	155,088			$	158,825
	Michigan	175			856				145,897				149,715
	Illinois	72			1,618				113,017				116,517
	Wisconsin	83			846				67,681				70,251
	Texas	63			800				49,440				50,431
	Pennsylvania	47			987				46,010				46,389
	Minnesota	41			685				27,476				28,074
	Washington	30			989				29,011				29,658
	New Jersey	36			754				26,145				27,143
	Missouri	19			1,019				18,814				19,357
	New York	19			618				11,448				11,734
	Other	122			641				76,879				78,034
	Total general obligation bonds	856			$	918			$	766,906			$	786,128
	(Dollars in thousands)	December 31, 2013
	U.S. State	# of Issuers			Average Issue Size, Fair Value				Amortized Cost				Fair Value
	Ohio	152			$	1,048			$	158,641			$	159,232
	Michigan	166			744				122,198				123,571
	Illinois	75			1,314				96,863				98,521
	Wisconsin	86			648				54,516				55,747
	Texas	69			771				54,295				53,204
	Pennsylvania	50			898				47,835				44,883
	Minnesota	45			663				29,840				29,816
	Washington	30			930				28,393				27,906
	New Jersey	38			722				27,101				27,440
	Missouri	20			969				19,253				19,382
	New York	22			585				13,064				12,878
	California	18			599				10,651				10,788
	Other	115			631				74,918				72,572
	Total general obligation bonds	886			$	831			$	737,568			$	735,940
	(Dollars in thousands)	September 30, 2013
	U.S. State	# of Issuers			Average Issue Size, Fair Value				Amortized Cost				Fair Value
	Ohio	153			$	945			$	145,769			$	144,584
	Illinois	68			1,017				69,302				69,149
	Texas	69			774				54,428				53,427
	Pennsylvania	55			894				51,556				49,194
	Wisconsin	82			640				51,572				52,448
	Minnesota	46			658				30,115				30,278
	New Jersey	38			726				27,130				27,604
	Michigan	178			823				140,651				146,448
	Washington	31			943				29,594				29,222
	Missouri	20			978				19,303				19,552
	New York	22			590				13,082				12,970
	California	18			604				10,666				10,873
	Other	116			634				75,569				73,495
	Total general obligation bonds	896			$	803			$	718,737			$	719,244
Other investments	'
	FRB and FHLB stock constitute the majority of other investments on the Consolidated Balance Sheets.
	(In thousands)	30-Sep-14				31-Dec-13				30-Sep-13
	FRB stock	$	55,435			$	55,294			$	55,294
	FHLB stock	92,547				125,032				214,586
	Other	439				477				489
	Total other investments	$	148,421			$	180,803			$	270,369
Realized Gains and Losses	'
		Three Months Ended September 30,								Nine Months Ended September 30,
	(In thousands)	2014				2013				2014				2013
	Realized gains	$	45			$	—			$	345			$	3,786
	Realized losses	(31		)		—				(195		)		(6,589		)
	Net securities (losses)/gains	$	14			$	—			$	150			$	(2,803	)
Gross unrealized losses and fair value of securities	'
	The following table presents the gross unrealized losses and fair value of securities by length of time that individual securities had been in a continuous loss position by major categories of available-for-sale and held-to-maturity securities.
				September 30, 2014
				Less than 12 months										12 months or longer										Total
	(In thousands)			Fair Value				Unrealized				Number		Fair Value				Unrealized				Number		Fair Value				Unrealized
								Losses				of						Losses				of						Losses
												Securities										Securities
	Securities available-for-sale
	Debt securities
		U.S. states and political subdivisions		$	5,298			$	(10	)		5		$	22,729			$	(597	)		37		$	28,027			$	(607	)
		Residential mortgage-backed securities:
		U.S. government agencies		25,456				(86		)		2		248,946				(6,960		)		19		274,402				(7,046		)
		Commercial mortgage-backed securities:
		U.S. government agencies		9,095				(56		)		2		45,208				(1,832		)		6		54,303				(1,888		)
		Residential collateralized mortgage-backed securities:
		U.S. government agencies		436,857				(3,528		)		29		890,497				(35,447		)		63		1,327,354				(38,975		)
		Commercial collateralized mortgage-backed securities:
		U.S. government agencies		61,703				(264		)		6		67,029				(1,529		)		7		128,732				(1,793		)
		Asset-backed securities:
		Collateralized loan obligations		100,337				(1,904		)		13		151,668				(5,353		)		23		252,005				(7,257		)
		Corporate debt securities		—				—				0		54,594				(7,044		)		8		54,594				(7,044		)
		Total available-for-sale securities		$	638,746			$	(5,848	)		57		$	1,480,671			$	(58,762	)		163		$	2,119,417			$	(64,610	)
	Securities held-to-maturity
	Debt securities
		U.S. government agency debentures		$	—			$	—			0		$	24,244			$	(756	)		1		$	24,244			$	(756	)
		U.S. states and political subdivisions		16,255				(78		)		20		29,783				(374		)		38		46,038				(452		)
		Residential mortgage-backed securities:
		U.S. government agencies		10,549				(64		)		1		188,704				(5,928		)		10		199,253				(5,992		)
		Commercial mortgage-backed securities:
		U.S. government agencies		26,346				(110		)		5		23,788				(566		)		3		50,134				(676		)
		Residential collateralized mortgage-backed securities:
		U.S. government agencies		121,516				(1,195		)		8		1,208,939				(55,065		)		60		1,330,455				(56,260		)
		Commercial collateralized mortgage-backed securities:
		U.S. government agencies		8,026				(30		)		1		182,299				(8,540		)		17		190,325				(8,570		)
		Collateralized loan obligations:
		Non-agency		—				—				0		—				—				0		—				—
		Corporate debt securities		46,907				(180		)		16		—				—				0		46,907				(180		)
		Total held-to-maturity securities		$	229,599			$	(1,657	)		51		$	1,657,757			$	(71,229	)		129		$	1,887,356			$	(72,886	)
				December 31, 2013
				Less than 12 months											12 months or longer											Total
	(In thousands)			Fair Value				Unrealized				Number			Fair Value				Unrealized				Number			Fair Value				Unrealized
								Losses				of							Losses				of Securities							Losses
												Securities
	Securities available-for-sale
		Debt securities:
		U.S. states and political subdivisions		$	38,039			$	(1,996	)		65			$	14,157			$	(1,800	)		25			$	52,196			$	(3,796	)
		Residential mortgage-backed securities:
		U.S. government agencies		434,761				(13,109		)		35			14,890				(1,318		)		2			449,651				(14,427		)
		Commercial mortgage-backed securities:
		U.S. government agencies		33,387				(1,491		)		5			16,944				(997		)		2			50,331				(2,488		)
		Residential collateralized mortgage-backed securities:
		U.S. government agencies		1,135,151				(44,775		)		74			100,530				(7,293		)		7			1,235,681				(52,068		)
		Nonagency		—				—				—			1				—				1			1				—
		Commercial collateralized mortgage-backed securities:
		U.S. government agencies		43,747				(2,055		)		6			2,525				(102		)		1			46,272				(2,157		)
		Asset-backed securities
		Collateralized loan obligations		223,458				(4,332		)		33			—				—				—			223,458				(4,332		)
		Corporate debt securities		—				—				—			50,644				(10,952		)		8			50,644				(10,952		)
		Total available-for-sale securities		$	1,908,543			$	(67,758	)		218			$	199,691			$	(22,462	)		46			$	2,108,234			$	(90,220	)
	Securities held-to-maturity
		Debt securities:
		U.S. government agency debentures		$	23,652			$	(1,348	)		1			$	—			$	—			—			$	23,652			$	(1,348	)
		U.S. states and political subdivisions		222,154				(10,276		)		353			2,478				(183		)		6			224,632				(10,459		)
		Residential mortgage-backed securities:
	U.S. government agencies		422,192				(11,617		)		22			—				—				—			422,192				(11,617		)
	Commercial mortgage-backed securities:
	U.S. government agencies		48,831				(1,190		)		8			—				—				—			48,831				(1,190		)
	Residential collateralized mortgage-backed securities:
	U.S. government agencies		1,382,915				(81,818		)		66			—				—				—			1,382,915				(81,818		)
	Nonagency
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies		208,863				(11,052		)		19			—				—				—			208,863				(11,052		)
	Collateralized loan obligations
	Nonagency
	Corporate debt securities		64,541				(725		)		23			—				—				—			64,541				(725		)
	Total held-to-maturity securities		$	2,373,148			$	(118,026	)		492			$	2,478			$	(183	)		6			$	2,375,626			$	(118,209	)
			September 30, 2013
			Less than 12 months											12 months or longer											Total
(In thousands)			Fair Value				Unrealized				Number			Fair Value				Unrealized				Number			Fair Value				Unrealized
							Losses				of							Losses				of							Losses
											Securities											Securities
Securities available-for-sale
Debt securities
	U.S. states and political subdivisions		$	57,258			$	(3,495	)		100			$	—			$	—			—			$	57,258			$	(3,495	)
	Residential mortgage-backed securities:
	U.S. government agencies		309,239				(10,035		)		23			—				—				—			309,239				(10,035		)
	Commercial mortgage-backed securities:
	U.S. government agencies		50,823				(2,220		)		7			—				—				—			50,823				(2,220		)
	Residential collateralized mortgage-backed securities:
	U.S. government agencies		1,073,105				(38,995		)		69			—				—				—			1,073,105				(38,995		)
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies		38,938				(1,690		)		5			—				—				—			38,938				(1,690		)
	Asset-backed securities
	Collateralized loan obligations		165,359				(3,295		)		26			—				—				—			165,359				(3,295		)
	Corporate debt securities		—				—				—			50,850				(10,732		)		8			50,850				(10,732		)
	Total available-for-sale securities		$	1,694,722			$	(59,730	)		230			$	50,850			$	(10,732	)		8			$	1,745,572			$	(70,462	)
Securities held-to-maturity
Debt securities
	U.S. government agency debentures		$	23,864			$	(1,136	)		1			$	—			$	—			—			$	23,864			$	(1,136	)
	U.S. states and political subdivisions		226,853				(9,243		)		362			987				(14		)		1			227,840				(9,257		)
	Residential mortgage-backed securities:
	U.S. government agencies		252,007				(8,578		)		13			—				—				—			252,007				(8,578		)
	Commercial mortgage-backed securities:
	U.S. government agencies		44,168				(1,025		)		7			—				—				—			44,168				(1,025		)
	Residential collateralized mortgage securities:
	U.S. government agencies		1,416,238				(68,719		)		64			—				—				—			1,416,238				(68,719		)
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies		191,402				(8,936		)		18			—				—				—			191,402				(8,936		)
	Corporate debt securities		66,774				(501		)		24			—				—				—			66,774				(501		)
	Total held-to-maturity securities		$	2,221,306			$	(98,138	)		489			$	987			$	(14	)		1			$	2,222,293			$	(98,152	)

Loans_Tables

Loans (Tables)	9 Months Ended
	Sep. 30, 2014
Loans and Leases Receivable Disclosure [Abstract]	'
Schedule of Accounts, Notes, Loans and Financing Receivable	'
	Loans outstanding as of September 30, 2014, December 31, 2013, and September 30, 2013, net of unearned income, consisted of the following:
	(In thousands)		September 30, 2014				December 31, 2013				September 30, 2013
	Originated loans:
	Commercial		$	7,626,166			$	6,648,279			$	6,420,369
	Residential mortgage		605,998				529,253				487,283
	Installment		2,277,533				1,727,925				1,647,095
	Home equity		1,062,013				920,066				889,372
	Credit cards		160,113				148,313				145,113
	Leases		339,936				239,551				199,907
		Total originated loans	12,071,759				10,213,387				9,789,139
	Allowance for originated loan losses		(90,883		)		(96,484		)		(98,291		)
		Net originated loans	$	11,980,876			$	10,116,903			$	9,690,848
	Acquired loans:
	Commercial		$	1,272,244			$	1,725,970			$	1,963,746
	Residential mortgage		410,065				470,652				466,594
	Installment		809,820				1,004,569				1,080,298
	Home equity		252,975				294,424				306,783
		Total acquired loans	2,745,104				3,495,615				3,817,421
	Allowance for acquired loan losses		(6,206		)		(741		)		—
		Net acquired loans	$	2,738,898			$	3,494,874			$	3,817,421
	Covered loans:
	Commercial		$	262,319			$	375,860			$	422,225
	Residential mortgage		43,672				50,679				52,796
	Installment		5,148				6,162				6,361
	Home equity		83,278				97,442				102,908
	Loss share receivable		30,746				61,827				69,986
		Total covered loans	425,163				591,970				654,276
	Allowance for covered loan losses		(42,988		)		(44,027		)		(45,544		)
		Net covered loans	$	382,175			$	547,943			$	608,732
	Total loans:
	Commercial		$	9,160,729			$	8,750,109			$	8,806,340
	Residential mortgage		1,059,735				1,050,584				1,006,673
	Installment		3,092,501				2,738,656				2,733,754
	Home equity		1,398,266				1,311,932				1,299,063
	Credit cards		160,113				148,313				145,113
	Leases		339,936				239,551				199,907
	Loss share receivable		30,746				61,827				69,986
		Total loans	15,242,026				14,300,972				14,260,836
	Total allowance for loan losses		(140,077		)		(141,252		)		(143,835		)
		Total Net loans	$	15,101,949			$	14,159,720			$	14,117,001
Changes in Carrying Amount of Accretable Yield for Acquired Impaired Loans	'
	Total outstanding acquired impaired loans as of September 30, 2014 and 2013 were $659.7 million and $902.9 million, respectively. The outstanding balance of these loans is the undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loans, owed at the reporting date, whether or not currently due and whether or not any such amounts have been charged off. Changes in the carrying amount and accretable yield for acquired impaired loans were as follows for the three and nine months ended September 30, 2014 and 2013:
		Three Months Ended September 30,															Nine Months Ended September 30,
	Acquired Impaired Loans	2014								2013							2014						2013
	(In thousands)	Accretable Yield				Carrying Amount of Loans				Accretable Yield				Carrying Amount of Loans			Accretable Yield			Carrying Amount of Loans			Accretable Yield			Carrying Amount of Loans
	Balance at beginning of period	$	137,442			$	519,250			$	120,067			$	752,682		$	136,646		$	601,000		$	—		$	—
	Additions due to Citizens acquisition on April 12, 2013	—				—				—				—			—			—			131,558			819,715
	Accretion	(12,950		)		12,950				(8,914		)		8,914			(37,437		)	37,437			(18,004		)	18,004
	Net reclassifications from nonaccretable to accretable	6,646				—				—				—			36,659			—			—			—
	Payments received, net	—				(53,150		)		—				(90,729		)	—			(159,387		)	—			(166,852		)
	Disposals	(4,714		)		—				(4,546		)		—			(9,444		)	—			(6,947		)	—
	Balance at end of period	$	126,424			$	479,050			$	106,607			$	670,867		$	126,424		$	479,050		$	106,607		$	670,867
Changes in Loss Share Receivable Associated with Covered Loans	'
	Changes in the loss share receivable associated with covered loans for the three and nine months ended September 30, 2014 and 2013 were as follows:
	Loss Share Receivable	Three Months Ended September 30,								Nine Months Ended September 30,
	(In thousands)	2014				2013				2014				2013
	Balance at beginning of period	$	43,981			$	83,910			$	61,827			$	113,734
	Amortization	(6,932		)		(5,226		)		(16,980		)		(19,327		)
	Increase/(decrease) due to impairment (recapture) on covered loans	2,908				1,032				3,835				8,890
	FDIC reimbursement	(7,006		)		(7,284		)		(13,330		)		(23,231		)
	Covered loans paid in full	(2,205		)		(2,446		)		(4,606		)		(10,080		)
	Balance at end of the period	$	30,746			$	69,986			$	30,746			$	69,986
Changes in Carrying Amount of Accretable Yield for Covered Impaired Loans	'
	Total outstanding covered impaired loans were $520.3 million and $811.3 million as of September 30, 2014 and 2013, respectively. The outstanding balance of these loans is the undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loans, owed at the reporting date, whether or not currently due and whether or not any such amounts have been charged off. Changes in the carrying amount and accretable yield for covered impaired loans were as follows for the three and nine months ended September 30, 2014 and 2013:
		Three Months Ended September 30,															Nine Months Ended September 30,
	Covered Impaired Loans	2014								2013							2014						2013
	(In thousands)	Accretable				Carrying				Accretable				Carrying			Accretable			Carrying			Accretable			Carrying
		Yield				Amount of				Yield				Amount of			Yield			Amount of			Yield			Amount of
						Loans								Loans						Loans						Loans
	Balance at beginning of period	$	53,655			$	316,481			$	81,758			$	537,257		$	67,282		$	403,692		$	113,288		$	762,386
	Accretion	(9,683		)		9,683				(14,056		)		14,056			(34,438		)	34,438			(51,327		)	51,327
	Net reclassifications from non-accretable to accretable	8,684				—				12,745				—			20,290			—			28,726			—
	Payments received, net	—				(41,598		)		—				(103,514		)	—			(153,564		)	—			(365,914		)
	Disposals	(711		)		—				(1,309		)		—			(1,189		)	—			(11,549		)	—
	Balance at end of period	$	51,945			$	284,566			$	79,138			$	447,799		$	51,945		$	284,566		$	79,138		$	447,799
Past Due Financing Receivables	'
	The following tables provide a summary of loans by portfolio type, including the delinquency status of those loans that continue to accrue interest and those loans that are nonaccrual:
	As of September 30, 2014
	(In thousands)																						≥ 90 Days
	Originated Loans	Days Past Due												Total						Total			Past Due and			Nonaccrual
		30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (a)			Loans
	Commercial
	C&I	$	1,833			$	321			$	3,302			$	5,456		$	5,033,864		$	5,039,320		$	120		$	12,124
	CRE	4,111				1,251				5,918				11,280			2,108,454			2,119,734			523			10,223
	Construction	255				—				—				255			466,857			467,112			—			—
	Leases	—				—				—				—			339,936			339,936			—			—
	Consumer
	Installment	12,040				3,553				4,353				19,946			2,257,587			2,277,533			3,630			3,205
	Home Equity Lines	1,975				538				705				3,218			1,058,795			1,062,013			390			1,426
	Credit Cards	746				434				688				1,868			158,245			160,113			423			412
	Residential Mortgages	11,533				2,836				7,703				22,072			583,926			605,998			3,452			11,931
	Total	$	32,493			$	8,933			$	22,669			$	64,095		$	12,007,664		$	12,071,759		$	8,538		$	39,321
	Acquired Loans																						≥ 90 Days
		Days Past Due												Total						Total			Past Due and			Nonaccrual
		30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (c)			Loans (c)
	Commercial
	C&I	$	626			$	5,478			$	5,303			$	11,407		$	540,082		$	551,489		$	—		$	876
	CRE	4,568				2,269				20,776				27,613			682,882			710,495			370			2,072
	Construction	3,179				—				687				3,866			6,394			10,260			—			—
	Consumer
	Installment	6,764				2,164				1,045				9,973			799,847			809,820			542			1,059
	Home Equity Lines	2,540				1,234				2,872				6,646			246,329			252,975			1,279			680
	Residential Mortgages	262				2,724				5,710				8,696			401,369			410,065			520			1,305
	Total	$	17,939			$	13,869			$	36,393			$	68,201		$	2,676,903		$	2,745,104		$	2,711		$	5,992
	Covered Loans (b)																						≥ 90 Days
		Days Past Due												Total						Total			Past Due and			Nonaccrual
		30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (c)			Loans (c)
	Commercial
	C&I	$	288			$	—			$	6,535			$	6,823		$	49,253		$	56,076		n/a			n/a
	CRE	1,656				1,524				66,219				69,399			123,347			192,746			n/a			n/a
	Construction	—				—				11,981				11,981			1,516			13,497			n/a			n/a
	Consumer
	Installment	67				—				—				67			5,081			5,148			n/a			n/a
	Home Equity Lines	2,327				315				4,065				6,707			76,571			83,278			n/a			n/a
	Residential Mortgages	6,216				402				3,734				10,352			33,320			43,672			n/a			n/a
	Total	$	10,554			$	2,241			$	92,534			$	105,329		$	289,088		$	394,417		n/a			n/a
	(a) Installment loans 90 days or more past due and accruing include $2.5 million of loans guaranteed by the U.S. government as of September 30, 2014.
	(b) Excludes loss share receivable of $30.7 million as of September 30, 2014.
	(c) Acquired and covered impaired loans were not classified as nonperforming assets at September 30, 2014 as the loans are considered to be performing under ASC 310-30. As a result, interest income, through the accretion of the difference between the carrying amount of the loans and the expected cash flows, is being recognized on all acquired and covered impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and covered impaired loans.
	As of December 31, 2013
	(In thousands)																						≥ 90 Days
	Originated Loans	Days Past Due												Total						Total			Past Due and			Nonaccrual
		30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (a)			Loans
	Commercial
	C&I	$	8,941			$	994			$	10,622			$	20,557		$	4,119,010		$	4,139,567		$	151		$	11,323
	CRE	4,507				2,400				9,688				16,595			2,153,192			2,169,787			460			14,229
	Construction	351				21				66				438			338,487			338,925			—			122
	Leases	902				—				—				902			238,649			239,551			—			—
	Consumer
	Installment	15,433				4,050				4,462				23,945			1,703,980			1,727,925			3,735			3,681
	Home Equity Lines	1,864				918				965				3,747			916,319			920,066			418			1,819
	Credit Cards	729				471				735				1,935			146,378			148,313			404			558
	Residential Mortgages	19,858				2,072				9,350				31,280			497,973			529,253			6,008			10,471
	Total	$	52,585			$	10,926			$	35,888			$	99,399		$	10,113,988		$	10,213,387		$	11,176		$	42,203
	Acquired Loans																						≥ 90 Days
		Days Past Due												Total						Total			Past Due and			Nonaccrual
		30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing ( c )			Loans ( c )
	Commercial
	C&I	$	1,295			$	862			$	3,744			$	5,901		$	788,178		$	794,079		$	40		$	795
CRE	5,603				5,281				26,366				37,250			881,395			918,645			403			651
Construction	2,675				—				—				2,675			10,571			13,246			—			—
Consumer
Installment	14,528				4,076				3,354				21,958			982,611			1,004,569			2,263			679
Home Equity Lines	4,774				1,933				3,606				10,313			284,111			294,424			1,039			1,300
Residential Mortgages	3,918				1,426				8,063				13,407			457,245			470,652			403			582
Total	$	32,793			$	13,578			$	45,133			$	91,504		$	3,404,111		$	3,495,615		$	4,148		$	4,007
Covered Loans (b)																						≥ 90 Days
	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (c)			Loans (c)
Commercial
C&I	$	836			$	1,489			$	12,957			$	15,282		$	60,955		$	76,237		n/a			n/a
CRE	2,855				3,443				103,077				109,375			164,219			273,594			n/a			n/a
Construction	2,191				1,917				20,388				24,496			1,533			26,029			n/a			n/a
Consumer
Installment	33				—				—				33			6,130			6,163			n/a			n/a
Home Equity Lines	544				1,467				1,651				3,662			93,780			97,442			n/a			n/a
Residential Mortgages	7,463				1,565				5,165				14,193			36,485			50,678			n/a			n/a
Total	$	13,922			$	9,881			$	143,238			$	167,041		$	363,102		$	530,143		n/a			n/a
(a) Installment loans 90 days or more past due and accruing include $2.1 million of loans guaranteed by the U.S. government as of December 31, 2013.
(b) Excludes loss share receivable of $61.8 million as of December 31, 2013.
(c) Acquired and covered impaired loans were not classified as nonperforming assets at December 31, 2013 as the loans are considered to be performing under ASC 310-30. As a result, interest income, through the accretion of the difference between the carrying amount of the loans and the expected cash flows, is being recognized on all acquired and covered impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and covered impaired loans.
As of September 30, 2013
(In thousands)																						≥ 90 Days
Originated Loans	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (a)			Loans
Commercial
C&I	$	3,571			$	3,889			$	4,931			$	12,391		$	3,851,704		$	3,864,095		$	201		$	5,234
CRE	2,794				1,414				8,976				13,184			2,214,228			2,227,412			1,047			13,821
Construction	—				—				24				24			328,838			328,862			—			85
Leases	726				—				—				726			199,181			199,907			—			—
Consumer
Installment	9,825				3,392				5,378				18,595			1,628,500			1,647,095			4,506			3,894
Home Equity Lines	1,094				498				1,118				2,710			886,662			889,372			500			2,038
Credit Cards	781				434				700				1,915			143,198			145,113			365			422
Residential Mortgages	13,487				3,771				9,344				26,602			460,681			487,283			5,833			10,094
Total	$	32,278			$	13,398			$	30,471			$	76,147		$	9,712,992		$	9,789,139		$	12,452		$	35,588
Acquired Loans																						≥ 90 Days
	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing ( c )			Loans ( c )
Commercial
C&I	$	2,107			$	331			$	2,325			$	4,763		$	972,898		$	977,661		$	—		$	2,029
CRE	3,068				2,816				25,268				31,152			936,751			967,903			—			—
Construction	—				—				—				—			18,182			18,182			—			—
Consumer
Installment	10,883				2,866				1,446				15,195			1,065,103			1,080,298			—			954
Home Equity Lines	3,779				982				3,522				8,283			298,500			306,783			—			2,184
Residential Mortgages	18,347				3,204				10,724				32,275			434,319			466,594			2,719			737
Total	$	38,184			$	10,199			$	43,285			$	91,668		$	3,725,753		$	3,817,421		$	2,719		$	5,904
Covered Loans (b)																						≥ 90 Days
	Days Past Due												Total						Total			Past Due and			Nonaccrual
	30-59				60-89				≥ 90				Past Due			Current			Loans			Accruing (c)			Loans (c)
Commercial
C&I	$	3,729			$	730			$	12,493			$	16,952		$	66,287		$	83,239		n/a			n/a
CRE	1,299				5,672				117,839				124,810			184,087			308,897			n/a			n/a
Construction	943				—				25,996				26,939			3,150			30,089			n/a			n/a
Consumer
Installment	57				4				—				61			6,300			6,361			n/a			n/a
Home Equity Lines	1,532				22				1,781				3,335			99,574			102,909			n/a			n/a
Residential Mortgages	8,333				661				5,966				14,960			37,835			52,795			n/a			n/a
Total	$	15,893			$	7,089			$	164,075			$	187,057		$	397,233		$	584,290		n/a			n/a
(a) Installment loans 90 days or more past due and accruing include $2.9 million of loans guaranteed by the U.S. government as of September 30, 2013.
(b) Excludes loss share receivable of $70.0 million as of September 30, 2013.
(c) Acquired and covered impaired loans were not classified as nonperforming assets at September 30, 2013 as the loans are considered to be performing under ASC 310-30. As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cash flows, is being recognized on all acquired and covered impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and covered impaired loans
Financing Receivable Credit Quality Indicators	'
	The following tables provide a summary of commercial loans by portfolio type and the Corporation's internal credit quality rating:
	As of September 30, 2014
	(In thousands)
		Originated Commercial Loans
		C&I				CRE				Construction				Leases			Total
	Grade 1	$	42,653			$	695			$	—			$	8,929		$	52,277
	Grade 2	214,307				3,523				—				12,525			230,355
	Grade 3	1,164,149				285,652				36,953				58,157			1,544,911
	Grade 4	3,458,074				1,761,138				420,721				258,880			5,898,813
	Grade 5	119,252				29,410				9,359				1,233			159,254
	Grade 6	40,885				39,316				79				212			80,492
	Grade 7	—				—				—				—			—
	Total	$	5,039,320			$	2,119,734			$	467,112			$	339,936		$	7,966,102
		Acquired Commercial Loans
		C&I				CRE				Construction				Leases			Total
	Grade 1	$	—			$	—			$	—			$	—		$	—
	Grade 2	—				—				—				—			—
	Grade 3	14,464				26,216				—				—			40,680
	Grade 4	492,667				592,969				10,260				—			1,095,896
	Grade 5	19,672				44,570				—				—			64,242
	Grade 6	24,686				46,740				—				—			71,426
	Grade 7	—				—				—				—			—
	Total	$	551,489			$	710,495			$	10,260			$	—		$	1,272,244
		Covered Commercial Loans
		C&I				CRE				Construction				Leases			Total
	Grade 1	$	—			$	—			$	—			$	—		$	—
	Grade 2	1,373				—				—				—			1,373
	Grade 3	—				—				—				—			—
	Grade 4	40,902				101,360				686				—			142,948
	Grade 5	1,245				3,908				—				—			5,153
	Grade 6	12,556				87,478				12,659				—			112,693
	Grade 7	—				—				152				—			152
	Total	$	56,076			$	192,746			$	13,497			$	—		$	262,319
	As of December 31, 2013
	(In thousands)
		Originated Commercial Loans
		C&I				CRE				Construction				Leases			Total
	Grade 1	$	34,909			$	241			$	—			$	9,271		$	44,421
	Grade 2	108,709				3,730				—				2,900			115,339
	Grade 3	802,624				315,150				25,632				54,446			1,197,852
	Grade 4	3,083,458				1,759,383				306,795				167,022			5,316,658
	Grade 5	71,857				34,969				267				5,750			112,843
	Grade 6	38,010				56,314				6,231				162			100,717
	Grade 7	—				—				—				—			—
	Total	$	4,139,567			$	2,169,787			$	338,925			$	239,551		$	6,887,830
		Acquired Commercial Loans
		C&I				CRE				Construction				Leases			Total
	Grade 1	$	—			$	—			$	—			$	—		$	—
	Grade 2	1,741				703				—				—			2,444
	Grade 3	79,634				29,224				—				—			108,858
	Grade 4	643,495				722,307				13,246				—			1,379,048
	Grade 5	46,807				93,499				—				—			140,306
	Grade 6	22,402				72,912				—				—			95,314
	Grade 7	—				—				—				—			—
	Total	$	794,079			$	918,645			$	13,246			$	—		$	1,725,970
		Covered Commercial Loans
		C&I				CRE				Construction				Leases			Total
	Grade 1	$	—			$	—			$	—			$	—		$	—
	Grade 2	968				—				—				—			968
	Grade 3	—				—				—				—			—
	Grade 4	41,115				113,863				601				—			155,579
	Grade 5	427				6,219				—				—			6,646
	Grade 6	31,621				153,318				23,208				—			208,147
Grade 7	2,106				194				2,220				—			4,520
Total	$	76,237			$	273,594			$	26,029			$	—		$	375,860
As of September 30, 2013
(In thousands)
	Originated Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	32,144			$	1,216			$	—			$	9,932		$	43,292
Grade 2	82,906				3,711				—				3,173			89,790
Grade 3	867,186				368,918				27,041				29,631			1,292,776
Grade 4	2,796,101				1,770,768				300,154				152,778			5,019,801
Grade 5	48,912				30,502				323				3,325			83,062
Grade 6	36,846				52,297				1,344				1,068			91,555
Grade 7	—				—				—				—			—
Total	$	3,864,095			$	2,227,412			$	328,862			$	199,907		$	6,620,276
Acquired Loans
	Acquired Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	—			$	—			$	—			$	—		$	—
Grade 2	96				—				—				—			96
Grade 3	27,827				29,123				—				—			56,950
Grade 4	849,858				744,362				18,182				—			1,612,402
Grade 5	55,558				102,256				—				—			157,814
Grade 6	44,322				92,162				—				—			136,484
Grade 7	—				—				—				—			—
Total	$	977,661			$	967,903			$	18,182			$	—		$	1,963,746
	Covered Commercial Loans
	C&I				CRE				Construction				Leases			Total
Grade 1	$	—			$	—			$	—			$	—		$	—
Grade 2	996				—				—				—			996
Grade 3	—				—				—				—			—
Grade 4	45,557				116,056				601				—			162,214
Grade 5	624				15,364				943				—			16,931
Grade 6	33,957				176,286				26,401				—			236,644
Grade 7	2,105				1,191				2,144				—			5,440
Total	$	83,239			$	308,897			$	30,089			$	—		$	422,225

Allowance_for_Loan_Losses_Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2014
Allowance for loan losses [Abstract]	'
Schedule of Credit Losses Related to Financing Receivables, Current and Noncurrent	'
	The following tables show activity in the originated ALL, by portfolio segment for the three and nine months ended September 30, 2014 and 2013, as well as the corresponding recorded investment in originated loans at the end of the period:
	As of September 30, 2014
	(In thousands)
	Originated Loans		C&I				CRE				Construction				Leases				Installment				Home Equity Lines				Credit Cards				Residential Mortgages			Total
	Three Months Ended
	Allowance for originated loan losses, beginning balance		$	43,256			$	8,730			$	1,323			$	1,028			$	12,243			$	13,903			$	7,328			$	4,139		$	91,950
	Charge-offs		(3,569		)		(570		)		—				—				(5,041		)		(1,361		)		(778		)		(91		)	(11,410		)
	Recoveries		1,262				43				5				2				2,944				708				403				114			5,481
	Provision for loan losses		(3,824		)		243				170				(294		)		3,514				4,648				559				(154		)	4,862
	Allowance for originated loan losses, ending balance		$	37,125			$	8,446			$	1,498			$	736			$	13,660			$	17,898			$	7,512			$	4,008		$	90,883
	Nine Months Ended
	Allowance for originated loan losses, beginning balance		$	42,981			$	12,265			$	2,810			$	1,081			$	11,935			$	12,900			$	7,740			$	4,772		$	96,484
	Charge-offs		(9,203		)		(3,345		)		—				—				(14,739		)		(3,403		)		(3,544		)		(1,484		)	(35,718		)
	Recoveries		2,681				77				35				374				8,735				2,227				1,260				219			15,608
	Provision for loan losses		666				(551		)		(1,347		)		(719		)		7,729				6,174				2,056				501			14,509
	Allowance for originated loan losses, ending balance		$	37,125			$	8,446			$	1,498			$	736			$	13,660			$	17,898			$	7,512			$	4,008		$	90,883
	Ending allowance for originated loan losses balance attributable to loans:
		Individually evaluated for impairment	$	1,399			$	1,620			$	—			$	—			$	1,086			$	190			$	322			$	1,435		$	6,052
		Collectively evaluated for impairment	35,726				6,826				1,498				736				12,574				17,708				7,190				2,573			84,831
	Total ending allowance for originated loan losses balance		$	37,125			$	8,446			$	1,498			$	736			$	13,660			$	17,898			$	7,512			$	4,008		$	90,883
	Originated loans:
		Originated loans individually evaluated for impairment	$	11,155			$	22,597			$	—			$	—			$	23,575			$	7,624			$	912			$	26,108		$	91,971
		Originated loans collectively evaluated for impairment	5,028,165				2,097,137				467,112				339,936				2,253,958				1,054,389				159,201				579,890			11,979,788
	Total ending originated loan balance		$	5,039,320			$	2,119,734			$	467,112			$	339,936			$	2,277,533			$	1,062,013			$	160,113			$	605,998		$	12,071,759
	As of September 30, 2013
	(In thousands)
	Originated Loans		C&I				CRE				Construction				Leases				Installment				Home Equity Lines				Credit Cards				Residential Mortgages			Total
	Three Months Ended
	Allowance for originated loan losses, beginning balance		$	45,167			$	16,823			$	2,044			$	909			$	8,725			$	13,266			$	7,288			$	4,423		$	98,645
	Charge-offs		(1,011		)		(211		)		—				—				(3,582		)		(1,843		)		(1,367		)		(501		)	(8,515		)
	Recoveries		1,162				168				394				11				2,624				802				438				39			5,638
	Provision for loan losses		(2,140		)		(1,632		)		267				99				2,710				662				1,147				1,410			2,523
	Allowance for originated loan losses, ending balance		$	43,178			$	15,148			$	2,705			$	1,019			$	10,477			$	12,887			$	7,506			$	5,371		$	98,291
	Nine Months Ended
	Allowance for originated loan losses, beginning balance		$	36,209			$	20,126			$	3,821			$	639			$	11,154			$	13,724			$	7,384			$	5,885		$	98,942
	Charge-offs		(5,114		)		(1,014		)		(516		)		(1,237		)		(11,788		)		(5,177		)		(4,229		)		(1,185		)	(30,260		)
	Recoveries		5,745				503				483				100				7,859				1,884				1,420				133			18,127
	Provision for loan losses		6,338				(4,467		)		(1,083		)		1,517				3,252				2,456				2,931				538			11,482
	Allowance for originated loan losses, ending balance		$	43,178			$	15,148			$	2,705			$	1,019			$	10,477			$	12,887			$	7,506			$	5,371		$	98,291
	Ending allowance for originated loan losses balance attributable to loans:
		Individually evaluated for impairment	$	1,336			$	488			$	—			$	—			$	552			$	197			$	261			$	1,302		$	4,136
		Collectively evaluated for impairment	41,842				14,660				2,705				1,019				9,925				12,690				7,245				4,069			94,155
	Total ending allowance for originated loan losses balance		$	43,178			$	15,148			$	2,705			$	1,019			$	10,477			$	12,887			$	7,506			$	5,371		$	98,291
	Originated loans:
		Originated loans individually evaluated for impairment	$	7,476			$	19,755			$	958			$	—			$	30,608			$	6,787			$	1,253			$	23,064		$	89,901
		Originated loans collectively evaluated for impairment	3,856,619				2,207,657				327,904				199,907				1,616,487				882,585				143,860				464,219			9,699,238
	Total ending originated loan balance		$	3,864,095			$	2,227,412			$	328,862			$	199,907			$	1,647,095			$	889,372			$	145,113			$	487,283		$	9,789,139
	The following table presents the originated ALL and the recorded investment as of December 31, 2013:
	As of December 31, 2013
		(In thousands)
		Originated Loans	C&I				CRE				Construction				Leases				Installment				Home Equity Lines				Credit Cards				Residential Mortgages			Total
	Ending allowance for originated loan losses balance attributable to loans:
		Individually evaluated for impairment	$	3,235			$	229			$	—			$	—			$	1,014			$	223			$	312			$	1,133		$	6,146
		Collectively evaluated for impairment	39,746				12,036				2,810				1,081				10,921				12,677				7,428				3,639			90,338
	Total ending allowance for originated loan losses balance		$	42,981			$	12,265			$	2,810			$	1,081			$	11,935			$	12,900			$	7,740			$	4,772		$	96,484
	Originated loans:
		Loans individually evaluated for impairment	$	8,053			$	20,616			$	906			$	—			$	27,285			$	6,726			$	1,112			$	23,066		$	87,764
		Loans collectively evaluated for impairment	4,131,514				2,149,171				338,019				239,551				1,700,640				913,340				147,201				506,187			10,125,623
	Total ending originated loan balance		$	4,139,567			$	2,169,787			$	338,925			$	239,551			$	1,727,925			$	920,066			$	148,313			$	529,253		$	10,213,387
allowance for acquired impaired loan losses	'
	The following table presents activity in the allowance for acquired impaired loan losses for the three and nine months ended September 30, 2014. There was no allowance for acquired impaired loans as of September 30, 2013.
	Allowance for Acquired Impaired Loan Losses	Three Months Ended September 30,			Nine Months Ended September 30,
	(In thousands)	2014			2014
	Balance at beginning of the period	$	4,977		$	741
	Charge-offs	—			—
	Recoveries	—			—
	Provision for loan losses	1,229			5,465
	Balance at end of the period	$	6,206		$	6,206
Schedule of Credit Losses for Financing Receivables, Current	'
	The following table presents activity in the allowance for covered impaired loan losses for the three and nine months ended September 30, 2014 and 2013:
	Allowance for Covered Impaired Loan Losses		Three Months Ended September 30,								Nine Months Ended September 30,
	(In thousands)		2014				2013				2014				2013
	Balance at beginning of the period		$	45,109			$	49,069			$	44,027			$	43,255
		Net provision/(recapture) of loan losses before benefit attributable to FDIC loss share agreements	2,827				2,855				10,255				19,009
		Net (benefit)/recapture attributable to FDIC loss share agreements	(2,908		)		(1,032		)		(3,835		)		(8,890		)
	Net provision/(recapture) for loan losses		(81		)		1,823				6,420				10,119
	Increase (decrease) in loss share receivable		2,908				1,032				3,835				8,890
	Loans charged-off		(4,948		)		(6,380		)		(11,294		)		(16,720		)
	Balance at end of the period		$	42,988			$	45,544			$	42,988			$	45,544
Impaired Financing Receivables	'
	The following tables provide further detail on impaired loans individually evaluated for impairment and the associated ALL. Certain impaired loans do not have a related ALL as the valuation of these impaired loans exceeded the recorded investment.
	As of September 30, 2014
	Originated Loans						Unpaid								Average
			Recorded				Principal				Related				Recorded
	(In thousands)		Investment				Balance				Allowance				Investment
	Impaired loans with no related allowance
	Commercial
		C&I	$	8,411			$	15,740			$	—			$	12,484
		CRE	16,576				22,625				—				17,035
		Construction	—				—				—				—
	Consumer
		Installment	3,899				4,001				—				3,959
		Home equity line	2,015				2,045				—				2,073
		Credit card	27				27				—				44
		Residential mortgages	12,576				15,552				—				12,720
	Subtotal		43,504				59,990				—				48,315
	Impaired loans with a related allowance
	Commercial
		C&I	2,744				2,798				1,399				2,896
		CRE	6,021				6,022				1,620				3,381
		Construction	—				—				—				—
	Consumer
		Installment	19,676				20,314				1,086				20,039
		Home equity line	5,609				5,829				190				5,779
		Credit card	885				885				322				981
		Residential mortgages	13,532				13,641				1,435				13,566
	Subtotal		48,467				49,489				6,052				46,642
		Total impaired loans	$	91,971			$	109,479			$	6,052			$	94,957
	Note 1: These tables exclude loans fully charged off.
	Note 2: The differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.
	As of December 31, 2013
	Originated Loans						Unpaid								Average
			Recorded				Principal				Related				Recorded
	(In thousands)		Investment				Balance				Allowance				Investment
	Impaired loans with no related allowance
	Commercial
		C&I	$	2,503			$	6,679			$	—			$	7,256
		CRE	17,871				23,709				—				18,639
		Construction	906				1,179				—				1,035
	Consumer
		Installment	2,813				3,978				—				3,338
		Home equity line	1,018				1,347				—				1,079
		Credit card	49				49				—				91
		Residential mortgages	10,250				12,778				—				10,258
	Subtotal		35,410				49,719				—				41,696
	Impaired loans with a related allowance
	Commercial
		C&I	5,551				7,428				3,235				5,009
		CRE	2,744				2,870				229				2,836
		Construction	—				—				—				—
	Consumer
		Installment	24,472				24,558				1,014				24,985
		Home equity line	5,707				5,707				223				5,874
		Credit card	1,064				1,064				312				1,238
		Residential mortgages	12,816				12,898				1,133				12,064
	Subtotal		52,354				54,525				6,146				52,006
		Total impaired loans	$	87,764			$	104,244			$	6,146			$	93,702
	Note 1: These tables exclude loans fully charged off.
	Note 2: The differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.
	As of September 30, 2013
	Originated Loans						Unpaid								Average
			Recorded				Principal				Related				Recorded
	(In thousands)		Investment				Balance				Allowance				Investment
Impaired loans with no related allowance
Commercial
	C&I	$	3,826			$	7,887			$	—			$	11,842
	CRE	15,836				21,921				—				18,884
	Construction	958				1,237				—				1,851
Consumer
	Installment	3,051				4,344				—				3,521
	Home equity line	1,046				1,386				—				1,107
	Credit card	48				48				—				74
	Residential mortgages	10,363				12,899				—				10,122
Subtotal		35,128				49,722				—				47,401
Impaired loans with a related allowance
Commercial
	C&I	3,650				5,526				1,336				3,829
	CRE	3,920				4,251				488				4,126
	Construction	—				—				—				—
Consumer
	Installment	25,528				25,616				552				26,172
	Home equity line	5,869				5,869				197				6,017
	Credit card	1,205				1,205				261				1,352
	Residential mortgages	12,702				12,784				1,302				11,866
Subtotal		52,874				55,251				4,136				53,362
	Total impaired loans	$	88,002			$	104,973			$	4,136			$	100,763
Note 1: These tables exclude loans fully charged off.
Note 2: The differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.
Troubled Debt Restructurings on Financing ReceivableS	'
	The following tables provide the number of loans modified in a TDR and the recorded investment and unpaid principal balance by loan portfolio as of September 30, 2014, December 31, 2013, and September 30, 2013.
				As of September 30, 2014
	(Dollars in thousands)			Number of Loans			Recorded Investment				Unpaid Principal Balance
	Originated loans
		Commercial
			C&I	39			$	2,673			$	10,032
			CRE	63			18,087				22,905
			Construction	31			—				—
			Total originated commercial	133			20,760				32,937
		Consumer
			Installment	1,238			23,575				24,315
			Home equity lines	275			7,624				7,874
			Credit card	244			912				912
			Residential mortgages	325			26,108				29,193
			Total originated consumer	2,082			58,219				62,294
	Total originated loans			2,215			$	78,979			$	95,231
	Acquired loans
		Commercial
			C&I	1			$	3			$	3
			CRE	2			2,336				2,336
			Total acquired commercial	3			2,339				2,339
		Consumer
			Installment	37			960				1,021
			Home equity lines	121			5,995				6,041
			Residential mortgages	24			1,610				1,836
			Total acquired consumer	182			8,565				8,898
	Total acquired loans			185			$	10,904			$	11,237
	Covered loans
		Commercial
			C&I	6			$	177			$	1,620
			CRE	24			35,904				51,067
			Construction	10			650				10,899
			Total covered commercial	40			36,731				63,586
		Consumer
			Home equity lines	62			8,458				8,458
			Residential mortgages	2			336				336
			Total covered consumer	64			8,794				8,794
	Total covered loans			104			$	45,525			$	72,380
	Total loans
		Commercial
			C&I	46			$	2,853			$	11,655
			CRE	89			56,327				76,308
			Construction	41			650				10,899
			Total commercial	176			59,830				98,862
		Consumer
			Installment	1,275			24,535				25,336
			Home equity lines	458			22,077				22,373
			Credit card	244			912				912
			Residential mortgages	351			28,054				31,365
			Total consumer	2,328			75,578				79,986
	Total loans			2,504			$	135,408			$	178,848
	Note 1: The differences between the recorded investment and unpaid principal balance amounts represents partial charge offs.
				As of December 31, 2013
	(Dollars in thousands)			Number of Loans			Recorded Investment				Unpaid Principal Balance
	Originated loans
		Commercial
			C&I	35			$	4,449			$	7,660
			CRE	52			15,932				20,569
			Construction	30			905				1,179
			Total originated commercial	117			21,286				29,408
		Consumer
			Installment	1,553			27,285				28,536
			Home equity lines	231			6,725				7,054
		Credit card	307			1,113				1,113
		Residential mortgages	301			23,067				25,676
		Total originated consumer	2,392			58,190				62,379
Total originated loans			2,509			$	79,476			$	91,787
Acquired loans
	Commercial
		C&I	1			6				5
		CRE	1			1,730				1,730
		Total acquired commercial	2			1,736				1,735
	Consumer
		Installment	12			505				542
		Home equity lines	8			245				270
		Residential mortgages	7			431				502
		Total acquired consumer	27			1,181				1,314
Total acquired loans			29			$	2,917			$	3,049
Covered loans
	Commercial
		C&I	4			$	1,104			$	2,331
		CRE	24			39,995				57,008
		Construction	10			4,144				24,547
		Total covered commercial	38			45,243				83,886
	Consumer
		Home equity lines	47			5,401				5,421
		Residential Mortgages	1			150				150
		Total covered consumer	48			5,551				5,571
Total covered loans			86			$	50,794			$	89,457
Total loans
	Commercial
		C&I	40			$	5,559			$	9,996
		CRE	77			57,657				79,307
		Construction	40			5,049				25,726
		Total commercial	157			68,265				115,029
	Consumer
		Installment	1,565			27,790				29,078
		Home equity lines	286			12,371				12,745
		Credit card	307			1,113				1,113
		Residential mortgages	309			23,648				26,328
		Total consumer	2,467			64,922				69,264
Total loans			2,624			$	133,187			$	184,293
Note 1: The differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.
			As of September 30, 2013
(Dollars in thousands)			Number of Loans			Recorded Investment				Unpaid Principal Balance
Originated loans
	Commercial
		C&I	35			$	5,455			$	9,533
		CRE	49			15,508				19,848
		Construction	31			958				1,237
		Total originated commercial	115			21,921				30,618
	Consumer
		Installment	1,655			28,578				29,960
		Home equity lines	240			6,916				7,255
		Credit card	339			1,253				1,253
		Residential mortgages	292			23,065				25,683
		Total originated consumer	2,526			59,812				64,151
Total originated loans			2,641			$	81,733			$	94,769
Acquired loans
	Commercial
		C&I	1			6				6
		Total acquired commercial	1			6				6
	Consumer
		Home equity lines	3			260				307
		Total acquired consumer	3			260				307
Total acquired loans			4			$	266			$	313
Covered loans
	Commercial
		C&I	4			$	1,537			$	2,377
		CRE	24			43,024				58,252
		Construction	10			4,040				23,796
		Total covered commercial	38			48,601				84,425
	Consumer
		Home equity lines	48			5,753				5,777
		Residential mortgages	1			152				151
		Total covered consumer	49			5,905				5,928
Total covered loans			87			$	54,506			$	90,353
Total loans
	Commercial
		C&I	40			$	6,998			$	11,916
		CRE	73			58,532				78,100
		Construction	41			4,998				25,033
		Total commercial	154			70,528				115,049
	Consumer
		Installment	1,655			28,578				29,960
		Home equity lines	291			12,929				13,339
		Credit card	339			1,253				1,253
		Residential mortgages	293			23,217				25,834
		Total consumer	2,578			65,977				70,386
Total loans			2,732			$	136,505			$	185,435
Note 1: The differences between the recorded investment and unpaid principal balance amounts represents partial charge offs.
Accruing and Nonaccruing Troubled Debt Restructurings	'
	The following tables provide a summary of the delinquency status of TDRs along with the specific allowance for loan loss, by loan type, as of September 30, 2014, December 31, 2013, and September 30, 2013, including TDRs that continue to accrue interest and TDRs included in nonperforming assets.
	As of September 30, 2014
		Accruing TDRs												Nonaccruing TDRs												Total				Total
	(In thousands)	Current				Delinquent				Total				Current				Delinquent				Total				TDRs				Allowance
	Originated loans
	Commercial
	C&I	$	594			$	—			$	594			$	116			$	1,963			$	2,079			$	2,673			$	653
	CRE	14,350				—				14,350				1,562				2,175				3,737				18,087				70
	Construction	—				—				—				—				—				—				—				—
	Total originated commercial	14,944				—				14,944				1,678				4,138				5,816				20,760				723
	Consumer
	Installment	21,046				533				21,579				1,847				149				1,996				23,575				1,086
	Home equity lines	6,479				180				6,659				915				50				965				7,624				190
	Credit card	800				97				897				—				15				15				912				322
	Residential mortgages	14,228				3,384				17,612				5,113				3,383				8,496				26,108				1,435
	Total originated consumer	42,553				4,194				46,747				7,875				3,597				11,472				58,219				3,033
	Total originated TDRs	$	57,497			$	4,194			$	61,691			$	9,553			$	7,735			$	17,288			$	78,979			$	3,756
	Acquired loans
	Commercial
	C&I	—				—				—				3				—				3				3				3
	CRE	1,627				—				1,627				709				—				709				2,336				148
	Total acquired commercial	1,627				—				1,627				712				—				712				2,339				151
	Consumer
	Installment	842				75				917				25				18				43				960				137
	Home equity lines	5,764				89				5,853				142				—				142				5,995				—
	Residential mortgages	824				—				824				737				49				786				1,610				14
	Total acquired consumer	7,430				164				7,594				904				67				971				8,565				151
	Total acquired TDRs	$	9,057			$	164			$	9,221			$	1,616			$	67			$	1,683			$	10,904			$	302
	Covered loans
	Commercial
	C&I	$	—			$	177			$	177			$	—			$	—			$	—			$	177			$	—
	CRE	5,729				30,175				35,904				—				—				—				35,904				2,949
	Construction	650				—				650				—				—				—				650				55
	Total covered commercial	6,379				30,352				36,731				—				—				—				36,731				3,004
	Consumer
	Home equity lines	7,498				624				8,122				336				—				336				8,458				—
	Residential mortgages	336				—				336				—				—				—				336				26
	Total covered consumer	7,834				624				8,458				336				—				336				8,794				26
	Total covered TDRs	$	14,213			$	30,976			$	45,189			$	336			$	—			$	336			$	45,525			$	3,030
	Total loans
	Commercial
	C&I	$	594			$	177			$	771			$	119			$	1,963			$	2,082			$	2,853			$	656
	CRE	21,706				30,175				51,881				2,271				2,175				4,446				56,327				3,167
	Construction	650				—				650				—				—				—				650				55
	Total commercial	22,950				30,352				53,302				2,390				4,138				6,528				59,830				3,878
	Consumer
	Installment	21,888				608				22,496				1,872				167				2,039				24,535				1,223
	Home equity lines	19,741				893				20,634				1,393				50				1,443				22,077				190
	Credit card	800				97				897				—				15				15				912				322
	Residential mortgages	15,388				3,384				18,772				5,850				3,432				9,282				28,054				1,475
	Total consumer	57,817				4,982				62,799				9,115				3,664				12,779				75,578				3,210
	Total TDRs	$	80,767			$	35,334			$	116,101			$	11,505			$	7,802			$	19,307			$	135,408			$	7,088
	As of December 31, 2013
		Accruing TDRs												Nonaccruing TDRs												Total				Total
	(In thousands)	Current				Delinquent				Total				Current				Delinquent				Total				TDRs				Allowance
	Originated loans
	Commercial
	C&I	$	1,438			$	879			$	2,317			$	177			$	1,955			$	2,132			$	4,449			$	665
	CRE	10,442				382				10,824				1,208				3,900				5,108				15,932				32
	Construction	848				—				848				—				57				57				905				—
	Total originated commercial	12,728				1,261				13,989				1,385				5,912				7,297				21,286				697
	Consumer
	Installment	23,342				1,238				24,580				2,483				222				2,705				27,285				1,014
Home equity lines	5,313				194				5,507				1,206				12				1,218				6,725				223
Credit card	1,046				66				1,112				—				1				1				1,113				312
Residential mortgages	12,276				3,327				15,603				4,360				3,104				7,464				23,067				1,133
Total originated consumer	41,977				4,825				46,802				8,049				3,339				11,388				58,190				2,682
Total originated TDRs	$	54,705			$	6,086			$	60,791			$	9,434			$	9,251			$	18,685			$	79,476			$	3,379
Acquired loans
Commercial
C&I	$	—			$	—			$	—			$	6			$	—			$	6			$	6			$	—
CRE	1,730				—				1,730				—				—				—				1,730				—
Total acquired commercial	1,730				—				1,730				6				—				6				1,736				—
Consumer
Installment	369				136				505				—				—				—				505				—
Home equity lines	182				—				182				63				—				63				245				—
Residential mortgages	245				—				245				32				154				186				431				—
Total acquired consumer	796				136				932				95				154				249				1,181				—
Total acquired TDRs	$	2,526			$	136			$	2,662			$	101			$	154			$	255			$	2,917			$	—
Covered loans
Commercial
C&I	$	362			$	742			$	1,104			$	—			$	—			$	—			$	1,104			$	—
CRE	5,259				34,736				39,995				—				—				—				39,995				3,022
Construction	698				3,446				4,144				—				—				—				4,144				800
Total covered commercial	6,319				38,924				45,243				—				—				—				45,243				3,822
Consumer
Home equity lines	5,377				24				5,401				—				—				—				5,401				—
Residential mortgages	150				—				150				—				—				—				150				—
Total covered consumer	5,527				24				5,551				—				—				—				5,551				—
Total covered TDRs	$	11,846			$	38,948			$	50,794			$	—			$	—			$	—			$	50,794			$	3,822
Commercial
C&I	$	1,800			$	1,621			$	3,421			$	183			$	1,955			$	2,138			$	5,559			$	665
CRE	17,431				35,118				52,549				1,208				3,900				5,108				57,657				3,054
Construction	1,546				3,446				4,992				—				57				57				5,049				800
Total commercial	20,777				40,185				60,962				1,391				5,912				7,303				68,265				4,519
Consumer
Installment	23,711				1,374				25,085				2,483				222				2,705				27,790				1,014
Home equity lines	10,872				218				11,090				1,269				12				1,281				12,371				223
Credit card	1,046				66				1,112				—				1				1				1,113				312
Residential mortgages	12,671				3,327				15,998				4,392				3,258				7,650				23,648				1,133
Total consumer	48,300				4,985				53,285				8,144				3,493				11,637				64,922				2,682
Total TDRs	$	69,077			$	45,170			$	114,247			$	9,535			$	9,405			$	18,940			$	133,187			$	7,201
As of September 30, 2013
	Accruing TDRs												Nonaccruing TDRs												Total				Total
(In thousands)	Current				Delinquent				Total				Current				Delinquent				Total				TDRs				Allowance
Originated loans
Commercial
C&I	$	3,249			$	180			$	3,429			$	395			$	1,631			$	2,026			$	5,455			$	736
CRE	10,333				347				10,680				1,976				2,852				4,828				15,508				294
Construction	895				—				895				63				—				63				958				—
Total originated commercial	14,477				527				15,004				2,434				4,483				6,917				21,921				1,030
Consumer
Installment	24,194				1,261				25,455				2,803				320				3,123				28,578				552
Home equity lines	5,544				112				5,656				1,260				—				1,260				6,916				197
Credit card	1,134				117				1,251				—				2				2				1,253				261
Residential mortgages	12,566				3,094				15,660				4,046				3,359				7,405				23,065				1,302
Total originated consumer	43,438				4,584				48,022				8,109				3,681				11,790				59,812				2,312
Total originated TDRs	$	57,915			$	5,111			$	63,026			$	10,543			$	8,164			$	18,707			$	81,733			$	3,342
Acquired loans
Commercial
C&I	$	—			$	—			$	—			$	—			$	6			$	6			$	6			$	—
Total acquired commercial	—				—				—				—				6				6				6				—
Consumer
Home equity lines	196				—				196				—				64				64				260				—
Total acquired consumer	196				—				196				—				64				64				260				—
Total acquired TDRs	$	196			$	—			$	196			$	—			$	70			$	70			$	266			$	—
Covered loans
Commercial
C&I	$	795			$	742			$	1,537			$	—			$	—			$	—			$	1,537			$	446
CRE	5,479				37,545				43,024				—				—				—				43,024				2,832
Construction	925				3,115				4,040				—				—				—				4,040				1,001
Total covered commercial	7,199				41,402				48,601				—				—				—				48,601				4,279
Consumer
Home equity lines	5,256				497				5,753				—				—				—				5,753				—
Residential mortgages	152				—				152				—				—				—				152				—
Total covered consumer	5,408				497				5,905				—				—				—				5,905				—
Total covered TDRs	$	12,607			$	41,899			$	54,506			$	—			$	—			$	—			$	54,506			$	4,279
Total loans
Commercial
C&I	$	4,044			$	922			$	4,966			$	395			$	1,637			$	2,032			$	6,998			$	1,182
CRE	15,812				37,892				53,704				1,976				2,852				4,828				58,532				3,126
Construction	1,820				3,115				4,935				63				—				63				4,998				1,001
Total commercial	21,676				41,929				63,605				2,434				4,489				6,923				70,528				5,309
Consumer
Installment	24,194				1,261				25,455				2,803				320				3,123				28,578				552
Home equity lines	10,996				609				11,605				1,260				64				1,324				12,929				197
Credit card	1,134				117				1,251				—				2				2				1,253				261
Residential mortgages	12,718				3,094				15,812				4,046				3,359				7,405				23,217				1,302
Total consumer	49,042				5,081				54,123				8,109				3,745				11,854				65,977				2,312
Total TDRs	$	70,718			$	47,010			$	117,728			$	10,543			$	8,234			$	18,777			$	136,505			$	7,621
Schedule of Debtor Troubled Debt Restructuring, Current Period	'
	The following table provides the number of loans modified in a TDR during the previous 12 months that subsequently defaulted during the three months ended September 30, 2014, as well as the recorded investment in these restructured loans as of September 30, 2014.
		As of September 30, 2014
	(Dollars in thousands)	Number of Loans			Recorded Investment
	Originated loans
	Commercial
	C&I	3			$	115
	CRE	1			328
	Construction	—			—
	Total originated commercial	4			443
	Consumer
	Installment	4			22
	Home equity lines	—			—
	Credit card	—			—
	Residential mortgages	—			—
	Total originated consumer	4			$	22
	Covered loans
	Consumer
	Installment	—			—
	Home equity lines	—			—
	Residential mortgages	—			—
	Total covered consumer	—			$	—
	Acquired loans
	Consumer
	Installment	1			77
	Home equity lines	1			61
	Residential mortgages	—			—
	Total acquired consumer	2			$	138
	Total loans
	Commercial
	C&I	3			$	115
	CRE	1			328
	Construction	—			—
	Total commercial	4			443
	Consumer
	Installment	5			99
	Home equity lines	1			61
	Credit card	—			—
	Residential mortgages	—			—
	Total consumer	6			160
	Total	10			$	603
		As of December 31, 2013
	(Dollars in thousands)	Number of Loans			Recorded Investment
	Originated loans
	Commercial
	C&I	4			$	1,773
	CRE	6			3,101
	Construction	1			231
	Total originated commercial	11			5,105
	Consumer
	Installment	17			170
	Home equity lines	—			—
	Credit card	33			245
	Residential mortgages	1			75
	Total originated consumer	51			$	490
	Covered loans
	Commercial
	C&I	—			$	—
	CRE	1			—
	Construction	1			45
	Total covered commercial	2			$	45
	Acquired loans
	Commercial
	C&I	—			$	—
CRE	—			—
Construction	—			—
Total acquired commercial	—			—
Consumer
Installment	—			—
Home equity lines	—			—
Residential mortgages	—			—
Total acquired consumer	—			$	—
Total loans
Commercial
C&I	4			$	1,773
CRE	7			3,101
Construction	2			276
Total commercial	13			5,150
Consumer
Installment	17			170
Home equity lines	—			—
Credit card	33			245
Residential mortgages	1			75
Total consumer	51			490
Total	64			$	5,640
	As of September 30, 2013
(Dollars in thousands)	Number of Loans			Recorded Investment
Originated loans
Commercial
C&I	—			$	—
CRE	1			920
Construction	—			—
Total originated commercial	1			920
Consumer
Installment	1			3
Home equity lines	1			24
Credit card	9			74
Residential mortgages	3			1,858
Total originated consumer	14			$	1,959
Covered loans
Consumer
Installment	—			—
Home equity lines	—			—
Residential mortgages	—			—
Total covered consumer	—			$	—
Acquired loans
Commercial
C&I	—			$	—
CRE	—			—
Construction	—			—
Total acquired commercial	—			—
Consumer
Installment	—			—
Home equity lines	—			—
Residential mortgages	—			—
Total acquired consumer	—			$	—
Total loans
Commercial
C&I	—			$	—
CRE	1			920
Construction	—			—
Total commercial	1			920
Consumer
Installment	1			3
Home equity lines	1			24
Credit card	9			74
Residential mortgages	3			1,858
Total consumer	14			1,959
Total	15			$	2,879

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Accumulated amortization of intangible assets	'
	The Corporation has other intangible assets that are amortized, consisting of core deposit intangibles, lease intangibles and trust relationship intangibles. The following tables show the gross carrying amount, accumulated amortization, and net carrying amount of these intangible assets.
		September 30, 2014
		Gross Carrying		Accumulated			Net Carrying
	(In thousands)	Amount		Amortization			Amount
	Core deposit intangibles (a)	$	82,323	$	(17,712	)	$	64,611
	Lease intangible	238		(167		)	71
	Trust Relationships (b)	14,000		(4,729		)	9,271
		$	96,561	(22,608		)	$	73,953
		December 31, 2013
		Gross Carrying		Accumulated			Net Carrying
	(In thousands)	Amount		Amortization			Amount
	Core deposit intangibles (a)	$	87,533	$	(16,065	)	$	71,468
	Non-compete covenant	102		(102		)	—
	Lease intangible	238		(140		)	98
	Trust Relationships (b)	14,000		(2,811		)	11,189
		$	101,873	$	(19,118	)	$	82,755
		September 30, 2013
		Gross Carrying		Accumulated			Net Carrying
	(In thousands)	Amount		Amortization			Amount
	Core deposit intangibles (a)	$	87,533	$	(14,325	)	$	73,208
	Non-compete covenant	102		(96		)	6
	Lease intangible	238		(131		)	107
	Trust relationships (b)	14,000		(1,874		)	12,126
		$	101,873	$	(16,426	)	$	85,447

Shareholders_Equity_Tables

Shareholders Equity (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted	'
	The reconciliation between basic and diluted EPS using the two-class method and treasury stock method is presented as follows:
		Three Months Ended September 30,				Nine Months Ended September 30,
	(In thousands)	2014		2013		2014		2013
	Basic EPS:
	Net income	$	63,898	$	40,715	$	176,872	$	126,510
	Less:
	Cash dividends on 5.875% non-cumulative perpetual series A, Preferred Stock	1,469		1,469		4,407		3,868
	Income allocated to participating securities	519		310		1,433		1,102
	Net income attributable to common shareholders	$	61,910	$	38,936	$	171,032	$	121,540
	Weighted average Common Stock outstanding used in basic EPS	165,389		165,044		165,263		144,402
	Basic net income per common share	$	0.37	$	0.24	$	1.03	$	0.84
	Diluted EPS:
	Income used in diluted earnings per common share calculation	$	61,910	$	38,936	$	171,032	$	121,540
	Weighted average Common Stock outstanding used in basic EPS	165,389		165,044		165,263		144,402
	Add: Common Stock equivalents:
	Warrant and stock plans	415		830		653		2,990
	Weighted average Common and Common Stock equivalent shares outstanding	165,804		165,874		165,916		147,392
	Diluted net income per common share	$	0.37	$	0.23	$	1.03	$	0.82

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Lines of business results and key performance measures	'
	The following tables present a summary of financial results as of and for the three and nine months ended September 30, 2014 and September 30, 2013:
																								FirstMerit
	(In thousands)	Commercial						Retail				Wealth						Other						Consolidated
	September 30, 2014	QTD			YTD			QTD		YTD		QTD			YTD			QTD			YTD			QTD		YTD
	OPERATIONS:
	Net interest income (loss)	$	105,191		$	317,178		$	95,710	$	283,839	$	5,119		$	14,596		$	(12,442	)	$	(32,556	)	$	193,578	$	583,057
	Provision (recapture) for loan losses	(7,642		)	(7,476		)	7,627		25,149		362			713			8,845			20,596			9,192		38,982
	Noninterest income	21,096			69,083			28,270		80,651		14,108			41,624			6,259			18,206			69,733		209,564
	Noninterest expense	58,221			181,435			85,954		269,331		12,777			37,874			6,193			11,238			163,145		499,878
	Net income (loss)	49,211			137,995			19,759		45,506		3,956			11,460			(9,028		)	(18,089		)	63,898		176,872
	AVERAGES:
	Assets	$	9,407,684		$	9,225,407		$	5,700,960	$	5,565,047	$	289,549		$	263,513		$	9,185,583		$	9,283,686		$	24,583,776	$	24,337,653
																								FirstMerit
	(In thousands)	Commercial						Retail				Wealth						Other						Consolidated
	September 30, 2013	QTD			YTD			QTD		YTD		QTD			YTD			QTD			YTD			QTD		YTD
	OPERATIONS:
	Net interest income (loss)	$	117,476		$	300,423		$	103,046	$	248,704	$	4,286		$	12,727		$	(21,468	)	$	(49,137	)	$	203,340	$	512,717
	Provision (recapture) for loan losses	(27		)	6,866			905		7,071		(736		)	(570		)	6,237			10,267			6,379		23,634
	Noninterest income	21,364			60,980			30,723		88,916		13,216			34,347			5,787			13,680			71,090		197,923
	Noninterest expense	57,033			151,587			96,153		235,518		14,650			38,698			42,763			79,830			210,599		505,633
	Net income (loss)	53,136			131,704			23,910		61,985		2,090			5,469			(38,421		)	(72,648		)	40,715		126,510
	AVERAGES:
	Assets	$	8,685,333		$	8,020,824		$	5,659,553	$	4,646,817	$	266,028		$	255,538		$	9,402,680		$	7,709,479		$	24,013,594	$	20,632,658

Derivatives_Instruments_and_He1

Derivatives Instruments and Hedging Activities Disclosure (Tables)	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments Designated as Hedging Instruments	'
	At September 30, 2014, December 31, 2013, and September 30, 2013, the notional values or contractual amounts and fair value of the Corporation's derivatives designated in hedge relationships were as follows:
		Asset Derivatives																		Liability Derivatives
		September 30, 2014						December 31, 2013							September 30, 2013					September 30, 2014				December 31, 2013				September 30, 2013
	(In thousands)	Notional/ Contract Amount			Fair Value (a)			Notional/ Contract Amount			Fair Value (a)				Notional/ Contract Amount			Fair Value (a)		Notional/ Contract Amount		Fair Value (b)		Notional/ Contract Amount		Fair Value (b)		Notional/ Contract Amount		Fair Value (b)
	Interest rate swaps:
	Fair value hedges	$	—		$	—		$	—		$	—			$	—		$	—	$	100,490	$	7,584	$	126,637	$	11,574	$	133,159	$	13,289
	(a) Included in "Other assets" on the Consolidated Balance Sheets
	(b) Included in "Other liabilities" on the Consolidated Balance Sheet
Derivative Instruments not Designated as Hedging Instruments	'
	As of September 30, 2014, December 31, 2013, and September 30, 2013, the notional values or contractual amounts and fair value of the Corporation's derivatives not designated in hedge relationships were as follows:
		Asset Derivatives																		Liability Derivatives
		September 30, 2014						December 31, 2013							September 30, 2013					September 30, 2014				December 31, 2013				September 30, 2013
	(In thousands)	Notional/ Contract Amount			Fair Value (a)			Notional/ Contract Amount			Fair Value (a)				Notional/ Contract Amount			Fair Value (a)		Notional/ Contract Amount		Fair Value (b)		Notional/ Contract Amount		Fair Value (b)		Notional/ Contract Amount		Fair Value (b)
	Interest rate swaps	$	1,655,371		$	40,937		$	1,622,525		$	46,577			$	1,546,228		$	51,044	$	1,655,371	$	40,937	$	1,622,531	$	46,577	$	1,546,228	$	51,044
	Mortgage loan commitments	167,634			1,975			90,541			891				144,572			2,729		—		—		—		—		—		—
	Forward sales contracts	—			—			40,906			384				—			—		67,528		91		—		—		68,581		1,081
	Credit contracts	20,504			—			—			—				—			—		58,157		—		49,914		—		50,336		—
	Foreign exchange	14,745			185			6,478			50				5,716			66		14,074		153		6,893		50		6,295		92
	Equity swap	—			—			—			—				—			—		61,145		515		63,813		—		54,763		—
	Total	$	1,858,254		$	43,097		$	1,760,450		$	47,902			$	1,696,516		$	53,839	$	1,856,275	$	41,696	$	1,743,151	$	46,627	$	1,726,203	$	52,217
	(a) Included in "Other assets" on the Consolidated Balance Sheets
	(b) Included in "Other liabilities" on the Consolidated Balance Sheets
Derivative Instruments, Gain (Loss)	'
	Gains and losses recognized in income on non-designated hedging instruments for the three and nine months ended September 30, 2014 and 2013 are as follows:
	Derivatives not		Location of Gain/(Loss)	Amount of Gain / (Loss) Recognized in Income on Derivatives (In thousands)
	designated as hedging		Recognized
	instruments		in Income on	Three Months Ended September 30,						Nine Months Ended September 30,
			Derivative	2014			2013			2014				2013
	Mortgage loan commitments		Other operating income	$	(516	)	$	1,950		$	1,084			$	(1,672	)
	Forward sales contracts		Other operating income	454			(5,538		)	(476		)		(1,019		)
	Foreign exchange contracts		Other operating income	320			195			1,012				(118		)
	Equity swap		Other operating expense	515			—			515				—
	Total			$	773		$	(3,393	)	$	2,135			$	(2,809	)
Offsetting disclosure for derivatives contracts	'
	The following tables illustrate the potential effect of the Corporation's derivative master netting arrangements, by type of financial instrument, on the Corporation's statement of financial position as of September 30, 2014, December 31, 2013, and September 30, 2013. The swap agreements the Corporation has in place with its commercial customers are not subject to enforceable master netting arrangements, and, therefore, are excluded from these tables.
		As of September 30, 2014
		Gross amounts recognized			Gross amounts offset in the consolidated balance sheet			Net amounts presented in the consolidated balance sheet			Gross amounts not offset in the consolidated balance sheet							Net amount
	(In thousands)										Financial instruments (a)				Collateral (b)
	Derivative Assets
	Interest rate swaps - non-designated	$	1,498		$	—		$	1,498		$	(1,498	)		$	—		$	—
	Foreign exchange	180			—			180			—				(180		)	—
	Total derivative assets	$	1,678		$	—		$	1,678		$	(1,498	)		$	(180	)	$	—
	Derivative liabilities
	Interest rate swaps - designated	$	7,584		$	—		$	7,584		$	—			$	(7,584	)	$	—
	Interest rate swaps - non-designated	39,439			—			39,439			(1,498		)		(37,941		)	—
	Foreign exchange	—			—			—			—				—			—
	Total derivative liabilities	$	47,023		$	—		$	47,023		$	(1,498	)		$	(45,525	)	$	—
		As of December 31, 2013
		Gross amounts recognized			Gross amounts offset in the consolidated balance sheet			Net amounts presented in the consolidated balance sheet			Gross amounts not offset in the consolidated balance sheet							Net amount
	(In thousands)										Financial instruments (a)				Collateral (b)
	Derivative assets
	Interest rate swaps - non-designated	$	4,791		$	—		$	4,791		$	(4,791	)		$	—		$	—
	Foreign exchange	4			—			4			(4		)		—			—
	Total derivative assets	$	4,795		$	—		$	4,795		$	(4,795	)		$	—		$	—
	Derivative liabilities
	Interest rate swaps - designated	$	11,574		$	—		$	11,574		$	—			$	(11,574	)	$	—
	Interest rate swaps - non-designated	41,787			—			41,787			(4,791		)		(36,996		)	—
	Foreign exchange	46			—			46			(4		)		(42		)	—
	Total derivative liabilities	$	53,407		$	—		$	53,407		$	(4,795	)		$	(48,612	)	$	—
		As of September 30, 2013
		Gross amounts recognized			Gross amounts offset in the consolidated balance sheet			Net amounts presented in the consolidated balance sheet			Gross amounts not offset in the consolidated balance sheet							Net amount
	(In thousands)										Financial instruments (a)				Collateral (b)
	Derivative assets
	Interest rate swaps - non-designated	$	2,585		$	—		$	2,585		$	(2,585	)		$	—		$	—
	Foreign exchange	66			—			66			(92		)		26			—
	Total derivative assets	$	2,651		$	—		$	2,651		$	(2,677	)		$	26		$	—
	Derivative liabilities
	Interest rate swaps - designated	$	13,289		$	—		$	13,289		$	—			$	(13,289	)	$	—
	Interest rate swaps - non-designated	48,458			—			48,458			(2,585		)		(45,873		)	—
	Foreign exchange	92			—			92			(92		)		—			—
	Total derivative liabilities	$	61,839		$	—		$	61,839		$	(2,677	)		$	(59,162	)	$	—
	(a) For derivative assets, this includes any derivative liability fair values that could be offset in the event of counterparty default. For derivative liabilities, this includes any derivative asset fair values that could be offset in the event of counterparty default.
	(b) For derivate assets, this includes the fair value of collateral received by the Corporation from the counterparty. Securities received as collateral are not included in the Consolidated Balance Sheets unless the counterparty defaults. For derivative liabilities, this includes the fair value of securities pledged by the Corporation to the counterparty. These securities are included in the Consolidated Balance Sheets unless the Corporation defaults.

Benefit_Plans_Tables

Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Schedule of Net Benefit Costs	'
	The components of net periodic benefit cost are as follows:
		Pension Benefits
		Three Months Ended September 30,						Nine Months Ended September 30,
	(In thousands)	2014			2013			2014			2013
	Service cost	$	182		$	585		$	546		$	1,755
	Interest cost	3,584			2,632			10,753			7,896
	Expected return on assets	(4,009		)	(2,960		)	(12,026		)	(8,880		)
	Amortization of unrecognized prior service costs	633			117			1,965			351
	Amortization of Actuarial Gain	708			1,174			2,221			3,522
	Net periodic pension cost	$	1,098		$	1,548		$	3,459		$	4,644
		Postretirement Benefits
		Three Months Ended September 30,						Nine Months Ended September 30,
	(In thousands)	2014			2013			2014			2013
	Service cost	$	16		$	24		$	49		$	74
	Interest cost	164			130			491			390
	Amortization of unrecognized prior service costs	(117		)	(117		)	(351		)	(351		)
	Amortization of Actuarial Gain	59			67			177			201
	Net periodic postretirement cost	$	122		$	104		$	366		$	314

Fair_Value_Measurement_Tables

Fair Value Measurement (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Recurring and Nonrecurring Fair Value Measurements	'
	The following tables present the balance of assets and liabilities measured at fair value on a recurring and nonrecurring basis as of September 30, 2014, December 31, 2013, and September 30, 2013:
					Fair Value by Hierarchy
	(In thousands)	30-Sep-14			Level 1		Level 2			Level 3
	Recurring fair value measurement
	Available-for-sale securities:
	Marketable equity securities	$	2,916		$	2,916	$	—		$	—
	Non-marketable equity securities	2,500			—		—			2,500
	U.S. States and political subdivisions	237,067			—		237,067			—
	Residential mortgage-backed securities:
	U.S. government agencies	996,387			—		996,387			—
	Commercial mortgage-backed securities:
	U.S. government agencies	84,764			—		84,764			—
	Residential collateralized mortgage-backed securities:
	U.S. government agencies	1,600,317			—		1,600,317			—
	Non-agency	7			—		1			6
	Commercial collateralized mortgage-backed securities:
	U.S. government agencies	194,017			—		194,017			—
	Corporate debt securities	54,594			—		—			54,594
	Asset-backed securities:
	Collateralized loan obligations	290,421			—		—			290,421
	Total available for sale securities	3,462,990			2,916		3,112,553			347,521
	Residential loans held for sale	19,512			—		19,512			—
	Derivative assets:
	Interest rate swaps - nondesignated	40,937			—		40,937			—
	Mortgage loan commitments	1,975			—		1,975			—
	Foreign exchange	185			—		185			—
	Total derivative assets	43,097			—		43,097			—
	Total fair value of assets (a)	$	3,525,599		$	2,916	$	3,175,162		$	347,521
	Derivative liabilities:
	Interest rate swaps - fair value hedges	$	7,584		$	—	$	7,584		$	—
	Interest rate swaps - nondesignated	40,937			—		40,937			—
	Forward sales contracts	91			—		91			—
	Foreign exchange	153			—		153			—
	Equity swap	515			—		—			515
	Total derivative liabilities	49,280			—		48,765			515
	True-up liability	12,804			—		—			12,804
	Total fair value of liabilities (a)	$	62,084		$	—	$	48,765		$	13,319
	Nonrecurring fair value measurement
	Mortgage servicing rights (b)	$	22,229		$	—	$	—		$	22,229
	Impaired loans (c)	55,406			—		—			55,406
	Other property (d)	14,896			—		—			14,896
	Other real estate covered by loss share (e)	5,798			—		—			5,798
	Total fair value	$	98,329		$	—	$	—		$	98,329
	(a) - There were no transfers between levels 1, 2 or 3 of the fair value hierarchy during the three months ended September 30, 2014.
	(b) - MSRs with a recorded investment of $22.2 million were reduced by a specific valuation allowance totaling $0.5 million to a reported carrying value of $21.7 million resulting in recognition of $0.1 million in recoveries included in loans sales and servicing income in the three months ended September 30, 2014.
	(c) - Collateral dependent impaired loans with a recorded investment of $59.9 million were reduced by specific valuation allowance allocations totaling $4.5 million to a reported net carrying value of $55.4 million.
	(d) - Amounts do not include assets held at cost at September 30, 2014. During the three months ended September 30, 2014, the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.7 million included in noninterest expense.
	(e) - Amounts do not include assets held at cost at September 30, 2014. During the three months ended September 30, 2014, the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses $0.1 million included in noninterest expense.
					Fair Value by Hierarchy
	(In thousands)	31-Dec-13			Level 1		Level 2			Level 3
	Recurring fair value measurement
	Available-for-sale securities:
	Marketable equity securities	$	3,036		$	3,036	$	—		$	—
	Nonmarketable equity securities	3,281			—		10			3,271
	U.S. States and political subdivisions	262,367			—		262,367			—
	Residential mortgage-backed securities:
	U.S. government agencies	969,922			—		969,922			—
	Commercial mortgage-backed securities:
	U.S. government agencies	69,567			—		69,567			—
	Residential collateralized mortgage-backed securities:
	U.S. government agencies	1,518,393			—		1,518,393			—
	Non-agency	9			—		—			9
	Commercial collateralized mortgage-backed securities:
U.S. government agencies	102,268			—		102,268			—
Corporate debt securities	50,644			—		—			50,644
Asset-backed securities
Collateralized loan obligations	293,687			—		—			293,687
Total available-for-sale securities	3,273,174			3,036		2,922,527			347,611
Residential loans held for sale	11,622			—		11,622			—
Derivative assets:
Interest rate swaps - nondesignated	46,577			—		46,577			—
Mortgage loan commitments	891			—		891			—
Forward sale contracts	384			—		384			—
Foreign exchange	50			—		50			—
Total derivative assets	47,902			—		47,902			—
Total fair value of assets (a)	$	3,332,698		$	3,036	$	2,982,051		$	347,611
Derivative liabilities:
Interest rate swaps - fair value hedges	$	11,574		$	—	$	11,574		$	—
Interest rate swaps - nondesignated	46,577			—		46,577			—
Foreign exchange	50			—		50			—
Total derivative liabilities	58,201			—		58,201			—
True-up liability	11,463			—		—			11,463
Total fair value of liabilities (a)	$	69,664		$	—	$	58,201		$	11,463
Nonrecurring fair value measurement
Mortgage servicing rights (b)	$	23,041		$	—	$	—		$	23,041
Impaired loans (c)	47,870			—		—			47,870
Other property (d)	10,018			—		—			10,018
Other real estate covered by loss share (e)	8,754			—		—			8,754
Total fair value	$	89,683		$	—	$	—		$	89,683
(a) - There were no transfers between levels 1, 2 or 3 of the fair value hierarchy during the year ended December 31, 2013.
(b) - MSRs with a recorded investment of $22.8 million were reduced by a specific valuation allowance totaling $0.3 million to a reported carrying value of $22.5 million resulting in a recovery of previously recognized expense of $2.3 million in recoveries included in loans sales and servicing income in the year ended ended December 31, 2013.
(c) - Collateral dependent impaired loans with a recorded investment of $52.6 million were reduced by specific valuation allowance allocations totaling $4.8 million to a reported net carrying value of $47.9 million.
(d) Amounts do not include assets held at cost at December 31, 2013. During the year ended December 31, 2013, the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $1.4 million included in noninterest expense.
(e) Amounts do not include assets held at cost at December 31, 2013. During the year ended December 31, 2013, the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $1.0 million included in noninterest expense.
				Fair Value by Hierarchy
(In thousands)	30-Sep-13			Level 1		Level 2			Level 3
Recurring fair value measurement
Available-for-sale securities:
Marketable equity securities	$	3,096		$	3,096	$	—		$	—
Non-marketable equity securities	3,281					10			3,271
U.S. States and political subdivisions	272,224			—		272,224			—
Residential mortgage-backed securities:
U.S. government agencies	999,375			—		999,375			—
Commercial mortgage-backed securities:
U.S. government agencies	55,932			—		55,932			—
Residential collateralized mortgage-backed securities:
U.S. government agencies	1,505,706			—		1,505,706			—
Non-agency	9			—		—			9
Commercial collateralized mortgage-backed securities:
U.S. government agencies	97,154			—		97,154			—
Corporate debt securities	50,850			—		—			50,850
Asset-backed securities:
Collateralized loan obligations	268,632			—		—			268,632
Total available-for-sale securities	3,256,259			3,096		2,930,401			322,762
Residential loans held for sale	17,813			—		17,813			—
Derivative assets:
Interest rate swaps - nondesignated	51,044			—		51,044			—
Mortgage loan commitments	2,729			—		2,729			—
Foreign exchange	66			—		66			—
Total derivative assets	53,839			—		53,839			—
Total fair value of assets (a)	$	3,327,911		$	3,096	$	3,002,053		$	322,762
Derivative liabilities:
Interest rate swaps - fair value hedges	13,289			—		13,289			—
Interest rate swaps - nondesignated	51,044			—		51,044			—
Forward sale contracts	1,081			—		1,081			—
Foreign exchange	92			—		92			—
Total derivative liabilities	65,506			—		65,506			—
True-up liability	11,457			—		—			11,457
Total fair value of liabilities (a)	$	76,963		$	—	$	65,506		$	11,457
Nonrecurring fair value measurement
Mortgage servicing rights (b)	$	22,616		$	—	$	—		$	22,616
Impaired loans (c)	48,129			—		—			48,129
Other property (d)	13,413			—		—			13,413
Other real estate covered by loss share (e)	8,475			—		—			8,475
Total fair value	$	92,633		$	—	$	—		$	92,633
(a) - There were no transfers between levels 1, 2 and 3 of the fair value hierarchy during the three months ended September 30, 2013.
(b) - MSRs with a recorded investment of $22.9 million were reduced by a specific valuation allowance totaling $0.6 million to a reported carrying value of $22.4 million resulting in recovery of a previously recognized expense of $0.1 million in the three months ended September 30, 2013.
(c) - Collateral dependent impaired loans with a recorded investment of $51.3 million were reduced by specific valuation allowance allocations totaling $3.1 million to a reported net carrying value of $48.1 million.
(d) - Amounts do not include assets held at cost at September 30, 2013. During the three months ended September 30, 2013, the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.3 million included in noninterest expense.
(e) - Amounts do not include assets held at cost at September 30, 2013. During the three months ended September 30, 2013, the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.2 million included in noninterest expense.
Summary of changes in Level 3 assets and liabilities measured at fair value	'
	The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the three and nine months ended September 30, 2014 and 2013 are summarized as follows:
		Three Months Ended September 30,										Nine Months Ended September 30,
		2014					2013					2014					2013
	(In thousands)	Available-for-sale securities			True-up liability		Available-for-sale securities			True-up liability		Available-for-sale securities			True-up liability		Available-for-sale securities			True-up liability
	Balance at beginning of period	$	350,733		$	12,581	$	212,512		$	10,937	$	347,610		$	11,463	$	49,661		$	12,259
	Fair value of assets acquired	—			—		—			—		—			—		3,271			—
	(Gains) losses included in earnings (a)	—			223		—			520		—			1,341		—			(802		)
	Unrealized gains (losses) (b)	277			—		(1,704		)	—		3,298			—		(2,066		)	—
	Purchases	—			—		111,941			—		—			—		271,857			—
	Settlements	(3,489		)	—		13			—		(3,387		)	—		39			—
	Balance at ending of period	$	347,521		$	12,804	$	322,762		$	11,457	$	347,521		$	12,804	$	322,762		$	11,457
	(a) Reported in "Other expense"
	(b) Reported in "Other comprehensive income (loss)"
Summary of Change in fair value carrying amount of residential mortgages	'
	The aggregate fair value, contractual balance and gain or loss on loans held for sale was as follows:
	(In thousands)	September 30, 2014			December 31, 2013		September 30, 2013
	Aggregate fair value carrying amount	$	19,512		$	11,622	$	17,813
	Aggregate unpaid principal / contractual balance	18,937			11,438		17,179
	Carrying amount over aggregate unpaid principal (a)	$	575		$	184	$	634
	(a) These changes are included in "Loan sales and servicing income" in the Consolidated Statements of Income.
Fair Value of Financial Instruments	'
	The carrying amount and estimated fair value of the Corporation’s financial instruments that are carried at either fair value or cost as of September 30, 2014, December 31, 2013, and September 30, 2013 are shown in the tables below.
		September 30, 2014
		Carrying			Fair Value
	(In thousands)	Amount			Total		Level 1			Level 2		Level 3
	Financial assets:
	Cash and cash equivalents	$	485,328		$	485,328	$	485,328		$	—	$	—
	Available-for-sale securities	3,462,990			3,462,990		2,916			3,112,553		347,521
	Held-to-maturity securities	3,002,262			2,947,172		—			2,947,172		—
	Other securities	148,421			148,421		—			148,421		—
	Loans held for sale	19,512			19,512		—			19,512		—
	Net originated loans	11,980,876			11,995,816		—			—		11,995,816
	Net acquired loans	2,738,898			2,869,303		—			—		2,869,303
	Net covered loans and loss share receivable	382,175			382,175		—			—		382,175
	Accrued interest receivable	65,736			65,736		—			65,736		—
	Derivatives	43,097			43,097		—			43,097		—
	Financial liabilities:
	Deposits	$	19,366,911		$	19,370,624	$	—		$	19,370,624	$	—
	Federal funds purchased and securities sold under agreements to repurchase	1,273,290			1,273,290		—			1,273,290		—
	Wholesale borrowings	608,463			611,753		—			611,753		—
	Long-term debt	249,933			259,051		—			259,051		—
	Accrued interest payable	5,310			5,310		—			5,310		—
	Derivatives	49,280			49,280		—			48,765		515
		December 31, 2013
		Carrying			Fair Value
	(In thousands)	Amount			Total		Level 1			Level 2		Level 3
	Financial assets:
	Cash and cash equivalents	$	917,822		$	917,822	$	917,822		$	—	$	—
	Available-for-sale securities	3,273,174			3,273,174		3,036			2,922,527		347,611
	Held-to-maturity securities	2,935,688			2,824,240		—			2,824,240		—
	Other securities	180,803			180,803		—			180,803		—
	Loans held for sale	11,622			11,622		—			11,622		—
	Net originated loans	10,116,903			10,017,722		—			—		10,017,722
	Net acquired loans	3,494,874			3,627,275		—			—		3,627,275
	Net covered loans and loss share receivable	547,943			547,943		—			—		547,943
	Accrued interest receivable	52,929			52,929		—			52,929		—
	Derivatives	47,902			47,902		—			47,902		—
	Financial liabilities:
	Deposits	$	19,533,601		$	19,532,368	$	—		$	19,532,368	$	—
	Federal funds purchased and securities sold under agreements to repurchase	851,535			851,535		—			851,535		—
	Wholesale borrowings	200,600			204,124		—			204,124		—
	Long-term debt	324,428			319,711		—			319,711		—
	Accrued interest payable	9,339			9,339		—			9,339		—
	Derivatives	58,201			58,201		—			58,201		—
		September 30, 2013
		Carrying			Fair Value
	(In thousands)	Amount			Total		Level 1			Level 2		Level 3
	Financial assets:
	Cash and cash equivalents	$	1,247,267		$	1,247,267	$	1,247,267		$	—	$	—
	Available for sale securities	3,256,259			3,256,259		3,096			2,930,401		322,762
	Held to maturity securities	2,749,934			2,658,433		—			2,658,433		—
	Other securities	270,369			270,369		—			270,369		—
	Loans held for sale	17,813			17,813		—			17,813		—
	Net originated loans	9,690,848			9,623,848		—			—		9,623,848
	Net acquired loans	3,817,421			3,817,421		—			—		3,817,421
	Net covered loans and loss share receivable	608,732			608,732		—			—		608,732
	Accrued interest receivable	49,820			49,820		—			49,820		—
	Derivatives	53,839			53,839		—			53,839		—
	Financial liabilities:
	Deposits	$	19,489,533		$	19,508,531	$	—		$	19,508,531	$	—
	Federal funds purchased and securities sold under agreements to repurchase	1,049,801			1,049,801		—			1,049,801		—
	Wholesale borrowings	200,858			204,461		—			204,461		—
	Long-term debt	324,425			321,255		—			321,255		—
	Accrued interest payable	5,884			5,884		—			5,884		—
Derivatives	65,506			65,506		—			65,506		—

Mortgage_Servicing_Rights_and_1

Mortgage Servicing Rights and Mortgage Servicing Activity (Tables)	9 Months Ended
	Sep. 30, 2014
Transfers and Servicing [Abstract]	'
Changes in the carrying amount of mortgage servicing rights	'
	Changes in the carrying amount of MSRs and MSRs valuation allowance are as follows:
		Three Months Ended September 30,						Nine Months Ended September 30,
	(In thousands)	2014			2013			2014			2013
	Balance at beginning of period	$	22,150		$	22,604		$	22,760		$	21,316
	Addition of Citizens' MSRs on Acquisition Date	—			—			—			1,065
	Additions	1,035			1,450			2,242			4,151
	Amortization	(996		)	(1,131		)	(2,813		)	(3,609		)
	Balance at end of period	22,189			22,923			22,189			22,923
	Valuation allowance at beginning of period	(562		)	(482		)	(282		)	(2,564		)
	Recoveries (Additions)	57			(90		)	(223		)	1,992
	Valuation allowance at end of period	(505		)	(572		)	(505		)	(572		)
	MSRs, net carrying balance	$	21,684		$	22,351		$	21,684		$	22,351
	Fair value at end of period	$	22,229		$	22,616		$	22,229		$	22,616
Changes in Key economics assumptions	'
	In reality, changes in one factor may result in changes in another (for example, changes in prepayment speed estimates could result in changes in the discount rates), which might magnify or counteract the sensitivities.
	Prepayment speed assumption (annual CPR)	10.88		%
	Decrease in fair value from 10% adverse change	$	753
	Decrease in fair value from 25% adverse change	$	1,813
	Discount rate assumption	9.89		%
	Decrease in fair value from 100 basis point adverse change	$	699
	Decrease in fair value from 200 basis point adverse change	$	1,352
	Expected weighted-average life (in months)	101.5

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Commitments to Extend Credit	'
	The following table shows the remaining contractual amount of each class of commitments to extend credit as of September 30, 2014, December 31, 2013, and September 30, 2013. This amount represents the Corporation's maximum exposure to loss if the customer were to draw upon the full amount of the commitment and subsequently default on payment for the total amount of the then outstanding loan.
	Loan commitments
	(In thousands)		September 30, 2014			December 31, 2013			September 30, 2013
		Commercial	$	3,640,755		$	3,367,625		$	3,521,227
		Consumer	2,361,476			2,179,010			2,057,115
		Total loan commitments	$	6,002,231		$	5,546,635		$	5,578,342
Schedule of Guarantor Obligations	'
	The Corporation is a guarantor in certain agreements with third parties. The following table shows the types of guarantees the Corporation had outstanding as of September 30, 2014, December 31, 2013, and September 30, 2013.
	Financial guarantees
	(In thousands)		September 30, 2014			December 31, 2013			September 30, 2013
		Standby letters of credit	$	227,835		$	196,400		$	200,835
		Loans sold with recourse	43,260			45,082			50,882
		Total financial guarantees	$	271,095		$	241,482		$	251,717
Changes in Repurchase Reserve	'
	Changes in the amount of the repurchase reserve for the three and nine months ended September 30, 2014 and 2013 are as follows:
		Three Months Ended September 30, 2014
	(In thousands)	Reserve on residential mortgage loans			Reserve on manufactured housing loans			Total repurchase reserve
	Balance at beginning of period	$	7,900		$	1,122		$	9,022
	Net realized losses	(600		)	—			(600		)
	Net increase (decrease) to reserve	250			—			250
	Balance at end of period	$	7,550		$	1,122		$	8,672
		Three Months Ended September 30, 2013
	(In thousands)	Reserve on residential mortgage loans			Reserve on manufactured housing loans			Total repurchased reserve
	Balance at beginning of period	$	7,287		$	1,106		$	8,393
	Assumed obligation	—			—			—
	Net realized losses	(1,983		)	—			(1,983		)
	Net increase (decrease) to reserve	2,546			3			2,549
	Balance at end of period	$	7,850		$	1,109		$	8,959

Changes_and_Reclassifications_1

Changes and Reclassifications Out of Accumulated Other Comprehensive Income Period Changes and Reclassifications Out of Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2014
Period Changes Out of Accumulated Other Comprehensive Income [Abstract]	'
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	Changes and Reclassifications Out of Accumulated Other Comprehensive Income
	The following table presents the changes in AOCI by component of comprehensive income for the three and nine months ended September 30, 2014 and 2013:
		Three Months Ended September 30, 2014											Nine Months Ended September 30, 2014
	(In thousands)	Pretax				Tax				After tax			Pretax			Tax			After tax
	Unrealized and realized securities gains and losses:
	Balance at the beginning of the period	$	(5,696	)		$	(1,994	)		$	(3,702	)	$	(45,072	)	$	(15,775	)	$	(29,297	)
	Changes in unrealized securities' holding gains/(losses)	(16,207		)		(5,672		)		(10,535		)	24,293			8,503			15,790
	Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity	(563		)		(197		)		(366		)	(1,551		)	(543		)	(1,008		)
	Net losses/(gains) realized on sale of securities reclassified to noninterest income	(14		)		(5		)		(9		)	(150		)	(53		)	(97		)
	Balance at the end of the period	(22,480		)		(7,868		)		(14,612		)	(22,480		)	(7,868		)	(14,612		)
	Pension plans and other postretirement benefits:
	Balance at the beginning and end of the period	(55,084		)		(19,279		)		(35,805		)	(57,812		)	(20,233		)	(37,579		)
	Current year actual losses (gains)	—				—				—			—			—			—
	Amortization of actuarial gain	768				269				499			2,398			839			1,559
	Amortization of prior service cost reclassified to other noninterest expense	516				181				335			1,614			565			1,049
	Balance at the end of the period	(53,800		)		(18,829		)		(34,971		)	(53,800		)	(18,829		)	(34,971		)
	Total Accumulated Other Comprehensive Income	$	(76,280	)		$	(26,697	)		$	(49,583	)	$	(76,280	)	$	(26,697	)	$	(49,583	)
		Three Months Ended September 30, 2013											Nine Months Ended September 30, 2013
	(In thousands)	Pretax				Tax				After tax			Pretax			Tax			After tax
	Unrealized and realized securities gains and losses:
	Balance at the beginning of the period	$	(420	)		$	(146	)		$	(274	)	$	85,259		$	29,841		$	55,418
	Changes in unrealized securities' holding gains/(losses)	(17,491		)		(6,123		)		(11,368		)	(104,853		)	(36,699		)	(68,154		)
	Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity	(534		)		(187		)		(347		)	(1,654		)	(579		)	(1,075		)
	Net losses/(gains) realized on sale of securities reclassified to noninterest income	(1		)		—				(1		)	2,802			981			1,821
	Balance at the end of the period	(18,446		)		(6,456		)		(11,990		)	(18,446		)	(6,456		)	(11,990		)
	Pension plans and other postretirement benefits:
	Balance at the beginning and end of the period	(110,188		)		(38,565		)		(71,623		)	(110,188		)	(38,565		)	(71,623		)
	Current year actual losses (gains)	—				—				—			—			—			—
	Amortization of actuarial gain	—				—				—			—			—			—
	Amortization of prior service cost reclassified to other noninterest expense	—				—				—			—			—			—
	Balance at the end of the period	(110,188		)		(38,565		)		(71,623		)	(110,188		)	(38,565		)	(71,623		)
	Total Accumulated Other Comprehensive Income	$	(128,634	)		$	(45,021	)		$	(83,613	)	$	(128,634	)	$	(45,021	)	$	(83,613	)
Tax Effect of Changes and Reclassifications Out of Accumulated Other Comprehensive Income	'
	The following table presents current period reclassifications out of AOCI by component of comprehensive income for the three and nine months ended September 30, 2014 and 2013:
	(In thousands)		Three Months Ended September 30, 2014				Nine Months Ended September 30, 2014				Income statement line item presentation
	Realized (gains)/losses on sale of securities		$	(14	)		$	(150	)		Investment securities losses (gains), net
	Tax expense (benefit) (35%)		(5		)		(53		)		Income tax expense (benefit)
	Reclassified amount, net of tax		$	(9	)		$	(97	)
	(In thousands)		Three Months Ended September 30, 2013				Nine Months Ended September 30, 2013				Income statement line item presentation
	Realized (gains)/losses on sale of securities		$	(1	)		$	2,802			Investment securities losses (gains), net
	Tax expense (benefit) (35%)		—				981				Income tax expense (benefit)
	Reclassified amount, net of tax		$	(1	)		$	1,821

Significant_Accounting_Policie2

Significant Accounting Policies Notes to Consolidated Financial Statements (Details)	Sep. 30, 2014
	Branch
Accounting Policies [Abstract]	'
Number of Branches	381

Significant_Accounting_Policie3

Significant Accounting Policies (Details) (Accounting standards update 2014-01 [Member], USD $)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Accounting standards update 2014-01 [Member]	'	'
New Accounting Pronouncement, Early Adoption [Line Items]	'	'
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$0.80	$2.30

Investment_Securities_Amortize

Investment Securities (Amortized Cost Table and Fair Value of Held to Maturity and Available for Sale Securities) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	$3,494,793	$3,329,117	$3,286,109
Available-for-sale Securities, Gross Unrealized Gain at End of Period	32,807	34,277	40,612
Available-for-sale Securities, Gross Unrealized Loss at End of Period	-64,610	-90,220	-70,462
Available-for-sale Securities Fair Value	3,462,990	3,273,174	3,256,259
Securities held to maturity	'	'	'
Held-to-maturity Securities, Amortized Cost	3,002,262	2,935,688	2,749,934
Held-to-maturity Securities, Unrecognized Holding Gain End of Period	17,796	6,761	6,651
Held-to-Maturity Securities, Unrecognized Holding Loss End of Period	-72,886	-118,209	-98,152
Held-to-maturity Securities, Fair Value	'	2,935,688	2,749,934
Held-to-maturity Securities, Fair Value	2,947,172	2,824,240	2,658,433
US Treasury Securities	'	'	'
Securities held to maturity	'	'	'
Held-to-maturity Securities, Amortized Cost	5,000	5,000	5,000
Held-to-maturity Securities, Unrecognized Holding Gain End of Period	3	4	5
Held-to-Maturity Securities, Unrecognized Holding Loss End of Period	0	0	0
Held-to-maturity Securities, Fair Value	5,003	5,004	5,005
US Government Agencies Debt Securities	'	'	'
Securities held to maturity	'	'	'
Held-to-maturity Securities, Amortized Cost	25,000	25,000	25,000
Held-to-maturity Securities, Unrecognized Holding Gain End of Period	0	0	0
Held-to-Maturity Securities, Unrecognized Holding Loss End of Period	-756	-1,348	-1,136
Held-to-maturity Securities, Fair Value	24,244	23,652	23,864
U.S. States and political subdivisions debt securities	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	229,528	258,787	267,470
Available-for-sale Securities, Gross Unrealized Gain at End of Period	8,146	7,376	8,249
Available-for-sale Securities, Gross Unrealized Loss at End of Period	-607	-3,796	-3,495
Available-for-sale Securities Fair Value	237,067	262,367	272,224
Securities held to maturity	'	'	'
Held-to-maturity Securities, Amortized Cost	539,014	480,703	453,230
Held-to-maturity Securities, Unrecognized Holding Gain End of Period	12,256	5,335	5,093
Held-to-Maturity Securities, Unrecognized Holding Loss End of Period	-452	-10,459	-9,257
Held-to-maturity Securities, Fair Value	550,818	475,579	449,066
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	983,038	962,687	983,255
Available-for-sale Securities, Gross Unrealized Gain at End of Period	20,395	21,662	26,155
Available-for-sale Securities, Gross Unrealized Loss at End of Period	-7,046	-14,427	-10,035
Available-for-sale Securities Fair Value	996,387	969,922	999,375
Securities held to maturity	'	'	'
Held-to-maturity Securities, Amortized Cost	602,220	569,960	377,980
Held-to-maturity Securities, Unrecognized Holding Gain End of Period	4,608	1,108	1,068
Held-to-Maturity Securities, Unrecognized Holding Loss End of Period	-5,992	-11,617	-8,578
Held-to-maturity Securities, Fair Value	600,836	559,451	370,470
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	86,485	72,048	58,129
Available-for-sale Securities, Gross Unrealized Gain at End of Period	167	7	23
Available-for-sale Securities, Gross Unrealized Loss at End of Period	-1,888	-2,488	-2,220
Available-for-sale Securities Fair Value	84,764	69,567	55,932
Securities held to maturity	'	'	'
Held-to-maturity Securities, Amortized Cost	65,704	56,596	50,179
Held-to-maturity Securities, Unrecognized Holding Gain End of Period	28	0	12
Held-to-Maturity Securities, Unrecognized Holding Loss End of Period	-676	-1,190	-1,025
Held-to-maturity Securities, Fair Value	65,056	55,406	49,166
Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	1,635,780	1,566,262	1,538,991
Available-for-sale Securities, Gross Unrealized Gain at End of Period	3,512	4,199	5,710
Available-for-sale Securities, Gross Unrealized Loss at End of Period	-38,975	-52,068	-38,995
Available-for-sale Securities Fair Value	1,600,317	1,518,393	1,505,706
Securities held to maturity	'	'	'
Held-to-maturity Securities, Amortized Cost	1,415,421	1,464,732	1,523,792
Held-to-maturity Securities, Unrecognized Holding Gain End of Period	66	0	179
Held-to-Maturity Securities, Unrecognized Holding Loss End of Period	-56,260	-81,818	-68,719
Held-to-maturity Securities, Fair Value	1,359,227	1,382,914	1,455,252
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	7	9	9
Available-for-sale Securities, Gross Unrealized Gain at End of Period	0	0	0
Available-for-sale Securities, Gross Unrealized Loss at End of Period	0	0	0
Available-for-sale Securities Fair Value	7	9	9
Securities held to maturity	'	'	'
Held-to-maturity Securities, Amortized Cost	0	'	'
Held-to-maturity Securities, Fair Value	0	'	'
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	195,512	104,152	98,440
Available-for-sale Securities, Gross Unrealized Gain at End of Period	298	273	404
Available-for-sale Securities, Gross Unrealized Loss at End of Period	-1,793	-2,157	-1,690
Available-for-sale Securities Fair Value	194,017	102,268	97,154
Securities held to maturity	'	'	'
Held-to-maturity Securities, Amortized Cost	258,436	240,069	220,410
Held-to-maturity Securities, Unrecognized Holding Gain End of Period	346	6	0
Held-to-Maturity Securities, Unrecognized Holding Loss End of Period	-8,570	-11,052	-8,936
Held-to-maturity Securities, Fair Value	250,212	229,023	211,474
Collateralized Loan Obligations	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	297,389	297,259	271,856
Available-for-sale Securities, Gross Unrealized Gain at End of Period	289	760	71
Available-for-sale Securities, Gross Unrealized Loss at End of Period	-7,257	-4,332	-3,295
Available-for-sale Securities Fair Value	290,421	293,687	268,632
Securities held to maturity	'	'	'
Held-to-maturity Securities, Amortized Cost	0	'	'
Held-to-maturity Securities, Fair Value	0	'	'
Corporate debt securities	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	61,638	61,596	61,582
Available-for-sale Securities, Gross Unrealized Gain at End of Period	0	0	0
Available-for-sale Securities, Gross Unrealized Loss at End of Period	-7,044	-10,952	-10,732
Available-for-sale Securities Fair Value	54,594	50,644	50,850
Securities held to maturity	'	'	'
Held-to-maturity Securities, Amortized Cost	91,467	93,628	94,343
Held-to-maturity Securities, Unrecognized Holding Gain End of Period	489	308	294
Held-to-Maturity Securities, Unrecognized Holding Loss End of Period	-180	-725	-501
Held-to-maturity Securities, Fair Value	91,776	93,211	94,136
Debt Securities	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	3,489,377	3,322,800	3,279,732
Available-for-sale Securities, Gross Unrealized Gain at End of Period	32,807	34,277	40,612
Available-for-sale Securities, Gross Unrealized Loss at End of Period	-64,610	-90,220	-70,462
Available-for-sale Securities Fair Value	3,457,574	3,266,857	3,249,882
Marketable Securities and Investments Held at Cost	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	2,916	3,036	3,096
Available-for-sale Securities, Gross Unrealized Gain at End of Period	0	0	0
Available-for-sale Securities, Gross Unrealized Loss at End of Period	0	0	0
Available-for-sale Securities Fair Value	2,916	3,036	3,096
Other Security Investments	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	2,500	3,281	3,281
Available-for-sale Securities, Gross Unrealized Gain at End of Period	0	0	0
Available-for-sale Securities, Gross Unrealized Loss at End of Period	0	0	0
Available-for-sale Securities Fair Value	2,500	3,281	3,281
Held-to-maturity Securities	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Amortized Cost Basis	5,416	6,317	6,377
Available-for-sale Securities, Gross Unrealized Gain at End of Period	0	0	0
Available-for-sale Securities, Gross Unrealized Loss at End of Period	0	0	0
Available-for-sale Securities Fair Value	$5,416	$6,317	$6,377

Investment_Securities_Investme

Investment Securities Investment Securities (Schedule of General Obligation Bonds) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	856	886	896
General obligation bonds, average issue size, fair value	$918	$831	$803
General obligation bonds, amortized cost	766,906	737,568	718,737
General obligation bonds, fair value	786,128	735,940	719,244
MICHIGAN	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	175	166	178
General obligation bonds, average issue size, fair value	856	744	823
General obligation bonds, amortized cost	145,897	122,198	140,651
General obligation bonds, fair value	149,715	123,571	146,448
OHIO	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	149	152	153
General obligation bonds, average issue size, fair value	1,066	1,048	945
General obligation bonds, amortized cost	155,088	158,641	145,769
General obligation bonds, fair value	158,825	159,232	144,584
ILLINOIS	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	72	75	68
General obligation bonds, average issue size, fair value	1,618	1,314	1,017
General obligation bonds, amortized cost	113,017	96,863	69,302
General obligation bonds, fair value	116,517	98,521	69,149
TEXAS	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	63	69	69
General obligation bonds, average issue size, fair value	800	771	774
General obligation bonds, amortized cost	49,440	54,295	54,428
General obligation bonds, fair value	50,431	53,204	53,427
WISCONSIN	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	83	86	82
General obligation bonds, average issue size, fair value	846	648	640
General obligation bonds, amortized cost	67,681	54,516	51,572
General obligation bonds, fair value	70,251	55,747	52,448
PENNSYLVANIA	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	47	50	55
General obligation bonds, average issue size, fair value	987	898	894
General obligation bonds, amortized cost	46,010	47,835	51,556
General obligation bonds, fair value	46,389	44,883	49,194
MINNESOTA	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	41	45	46
General obligation bonds, average issue size, fair value	685	663	658
General obligation bonds, amortized cost	27,476	29,840	30,115
General obligation bonds, fair value	28,074	29,816	30,278
WASHINGTON	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	30	30	31
General obligation bonds, average issue size, fair value	989	930	943
General obligation bonds, amortized cost	29,011	28,393	29,594
General obligation bonds, fair value	29,658	27,906	29,222
NEW JERSEY	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	36	38	38
General obligation bonds, average issue size, fair value	754	722	726
General obligation bonds, amortized cost	26,145	27,101	27,130
General obligation bonds, fair value	27,143	27,440	27,604
MISSOURI	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	19	20	20
General obligation bonds, average issue size, fair value	1,019	969	978
General obligation bonds, amortized cost	18,814	19,253	19,303
General obligation bonds, fair value	19,357	19,382	19,552
NEW YORK	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	19	22	22
General obligation bonds, average issue size, fair value	618	585	590
General obligation bonds, amortized cost	11,448	13,064	13,082
General obligation bonds, fair value	11,734	12,878	12,970
CALIFORNIA	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	'	18	18
General obligation bonds, average issue size, fair value	'	599	604
General obligation bonds, amortized cost	'	10,651	10,666
General obligation bonds, fair value	'	10,788	10,873
Other states	'	'	'
general obligation bonds [Line Items]	'	'	'
General Obligation Bonds number of issuers	122	115	116
General obligation bonds, average issue size, fair value	641	631	634
General obligation bonds, amortized cost	76,879	74,918	75,569
General obligation bonds, fair value	$78,034	$72,572	$73,495

Investment_Securities_Other_In

Investment Securities (Other Investments Table) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Other investments	'	'	'
FRB stock	$55,435	$55,294	$55,294
FHLB stock	92,547	125,032	214,586
Other	439	477	489
Total other investments	$148,421	$180,803	$270,369

Investment_Securities_Realized

Investment Securities (Realized Gain Loss Table) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Proceeds and gross unrealized gains and losses on sales of available-for-sale securities	'	'	'	'
Realized gains	$45	$0	$345	$3,786
Realized losses	-31	0	-195	-6,589
Net securities (losses)/gains	$14	$0	$150	($2,803)

Investment_Securities_Gross_Un

Investment Securities (Gross Unrealized Loss Table) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Securities available for sale	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$638,746	$1,908,543	$1,694,722
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	-5,848	-67,758	-59,730
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	57	218	230
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,480,671	199,691	50,850
available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	-58,762	-22,462	-10,732
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	163	46	8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,119,417	2,108,234	1,745,572
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	64,610	90,220	70,462
Securities held to maturity	'	'	'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	229,599	2,373,148	2,221,306
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	1,657	118,026	98,138
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	51	492	489
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,657,757	2,478	987
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	71,229	183	14
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	129	6	1
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	1,887,356	2,375,626	2,222,293
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses	72,886	118,209	98,152
US Government Agencies Debt Securities	'	'	'
Securities held to maturity	'	'	'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	23,652	23,864
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	0	1,348	1,136
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	0	1	1
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	24,244	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	756	0	0
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	1	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	24,244	23,652	23,864
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses	756	1,348	1,136
U.S. States and political subdivisions debt securities	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	5,298	38,039	57,258
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	-10	-1,996	-3,495
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	5	65	100
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	22,729	14,157	0
available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	-597	-1,800	0
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	37	25	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	28,027	52,196	57,258
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	607	3,796	3,495
Securities held to maturity	'	'	'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	16,255	222,154	226,853
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	78	10,276	9,243
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	20	353	362
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	29,783	2,478	987
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	374	183	14
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	38	6	1
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	46,038	224,632	227,840
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses	452	10,459	9,257
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	25,456	434,761	309,239
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	-86	-13,109	-10,035
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	2	35	23
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	248,946	14,890	0
available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	-6,960	-1,318	0
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	19	2	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	274,402	449,651	309,239
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	7,046	14,427	10,035
Securities held to maturity	'	'	'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	10,549	422,192	252,007
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	64	11,617	8,578
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	1	22	13
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	188,704	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	5,928	0	0
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	10	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	199,253	422,192	252,007
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses	5,992	11,617	8,578
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	9,095	33,387	50,823
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	-56	-1,491	-2,220
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	2	5	7
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	45,208	16,944	0
available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	-1,832	-997	0
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	6	2	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	54,303	50,331	50,823
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	1,888	2,488	2,220
Securities held to maturity	'	'	'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	26,346	48,831	44,168
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	110	1,190	1,025
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	5	8	7
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	23,788	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	566	0	0
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	3	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	50,134	48,831	44,168
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses	676	1,190	1,025
Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	436,857	1,135,151	1,073,105
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	-3,528	-44,775	-38,995
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	29	74	69
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	890,497	100,530	0
available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	-35,447	-7,293	0
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	63	7	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,327,354	1,235,681	1,073,105
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	38,975	52,068	38,995
Securities held to maturity	'	'	'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	121,516	1,382,915	1,416,238
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	1,195	81,818	68,719
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	8	66	64
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,208,939	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	55,065	0	0
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	60	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	1,330,455	1,382,915	1,416,238
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses	56,260	81,818	68,719
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	'	0	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	'	0	'
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	'	0	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	'	1	'
available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	'	0	'
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	'	1	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	'	1	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	'	0	'
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	61,703	43,747	38,938
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	-264	-2,055	-1,690
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	6	6	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	67,029	2,525	0
available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	-1,529	-102	0
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	7	1	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	128,732	46,272	38,938
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	1,793	2,157	1,690
Securities held to maturity	'	'	'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	8,026	208,863	191,402
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	30	11,052	8,936
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	1	19	18
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	182,299	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	8,540	0	0
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	17	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	190,325	208,863	191,402
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses	8,570	11,052	8,936
Collateralized Loan Obligations	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	100,337	223,458	165,359
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	-1,904	-4,332	-3,295
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	13	33	26
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	151,668	0	0
available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	-5,353	0	0
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	23	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	252,005	223,458	165,359
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	7,257	4,332	3,295
Corporate debt securities	'	'	'
Securities available for sale	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	0	0	0
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	0	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	54,594	50,644	50,850
available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	-7,044	-10,952	-10,732
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	8	8	8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	54,594	50,644	50,850
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	7,044	10,952	10,732
Securities held to maturity	'	'	'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	46,907	64,541	66,774
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	180	725	501
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	16	23	24
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0	0	0
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	0	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	46,907	64,541	66,774
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses	$180	$725	$501

Investment_Securities_Maturiti

Investment Securities (Maturities Table) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Schedule of Available-for-Sale and Held-to-Maturity Securities [Line Items]	'	'	'
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	'4 years 4 months 15 days	'	'
Securities Available for Sale	'	'	'
One year or less	$48,965	'	'
Available for Sale Securities Debt Maturities Maturity Period of One Year or Less Weighted Average Yield	3.59%	'	'
Over one year through five years	2,638,864	'	'
Available for Sale Securities Debt Maturities Maturity Period over One Year Through Five Years Weighted Average Yield	2.22%	'	'
Over five years through ten years	683,254	'	'
Available for Sale Securities Debt Maturities Maturity Period over Five Years Through Ten Years Weighted Average Yield	3.17%	'	'
Over ten years	86,491	'	'
Available for Sale Securities Debt Maturities Maturity Period over Ten Years Weighted Average Yield	2.02%	'	'
Weighted-Average Yield	2.42%	'	'
Securities Held to Maturity	'	'	'
One year or less	95,398	'	'
Held to Maturity Securities Debt Maturities Maturity Period of One Year or Less Weighted Average Yield	1.70%	'	'
Over one year through five years	2,125,604	'	'
Held to Maturity Securities Debt Maturities Maturity Period over One Year Through Five Years Weighted Average Yield	1.85%	'	'
Over five years through ten years	528,742	'	'
Held to Maturity Securities Debt Maturities Maturity Period over Five Years Through Ten Years Weighted Average Yield	2.90%	'	'
Over ten years	197,428	'	'
Held-to-maturity Securities, Fair Value	2,947,172	2,824,240	2,658,433
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	3,002,262	2,935,688	2,749,934
Weighted Average Yield	2.27%	'	'
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	'4 years 11 months 13 days	'	'
Held to Maturity Securities Debt Maturities Maturity Period over Ten Years Weighted Average Yield	5.47%	'	'
US Government Agencies Debt Securities	'	'	'
Securities Available for Sale	'	'	'
One year or less	0	'	'
Over one year through five years	0	'	'
Over five years through ten years	0	'	'
Over ten years	0	'	'
Fair Value	0	'	'
Amortized Cost	0	'	'
Weighted-Average Yield	0.00%	'	'
Securities Held to Maturity	'	'	'
One year or less	0	'	'
Over one year through five years	0	'	'
Over five years through ten years	24,244	'	'
Over ten years	0	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	25,000	25,000	25,000
Weighted Average Yield	1.43%	'	'
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	'5 years 0 months 29 days	'	'
US Treasury Securities	'	'	'
Securities Available for Sale	'	'	'
One year or less	0	'	'
Over one year through five years	0	'	'
Over five years through ten years	0	'	'
Over ten years	0	'	'
Fair Value	0	'	'
Amortized Cost	0	'	'
Weighted-Average Yield	0.00%	'	'
Securities Held to Maturity	'	'	'
One year or less	5,003	'	'
Over one year through five years	0	'	'
Over five years through ten years	0	'	'
Over ten years	0	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	5,000	5,000	5,000
Weighted Average Yield	0.25%	'	'
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	'0 years 4 months 0 days	'	'
U.S. States and political subdivisions debt securities	'	'	'
Schedule of Available-for-Sale and Held-to-Maturity Securities [Line Items]	'	'	'
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	'6 years 2 months 13 days	'	'
Securities Available for Sale	'	'	'
One year or less	12,583	'	'
Over one year through five years	66,352	'	'
Over five years through ten years	126,235	'	'
Over ten years	31,897	'	'
Weighted-Average Yield	5.23%	'	'
Securities Held to Maturity	'	'	'
One year or less	84,201	'	'
Over one year through five years	68,480	'	'
Over five years through ten years	200,709	'	'
Over ten years	197,428	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	539,014	480,703	453,230
Weighted Average Yield	4.70%	'	'
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	'9 years 7 months 25 days	'	'
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Schedule of Available-for-Sale and Held-to-Maturity Securities [Line Items]	'	'	'
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	'3 years 11 months 24 days	'	'
Securities Available for Sale	'	'	'
One year or less	2,969	'	'
Over one year through five years	820,635	'	'
Over five years through ten years	172,783	'	'
Over ten years	0	'	'
Weighted-Average Yield	2.63%	'	'
Securities Held to Maturity	'	'	'
One year or less	0	'	'
Over one year through five years	478,503	'	'
Over five years through ten years	122,333	'	'
Over ten years	0	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	602,220	569,960	377,980
Weighted Average Yield	2.15%	'	'
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	'4 years 7 months 11 days	'	'
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Schedule of Available-for-Sale and Held-to-Maturity Securities [Line Items]	'	'	'
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	'3 years 11 months 13 days	'	'
Securities Available for Sale	'	'	'
One year or less	16,749	'	'
Over one year through five years	35,549	'	'
Over five years through ten years	32,466	'	'
Over ten years	0	'	'
Weighted-Average Yield	2.12%	'	'
Securities Held to Maturity	'	'	'
One year or less	6,194	'	'
Over one year through five years	14,874	'	'
Over five years through ten years	43,988	'	'
Over ten years	0	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	65,704	56,596	50,179
Weighted Average Yield	2.08%	'	'
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	'4 years 11 months 2 days	'	'
Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Schedule of Available-for-Sale and Held-to-Maturity Securities [Line Items]	'	'	'
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	'3 years 9 months 26 days	'	'
Securities Available for Sale	'	'	'
One year or less	9,163	'	'
Over one year through five years	1,561,512	'	'
Over five years through ten years	29,642	'	'
Over ten years	0	'	'
Weighted-Average Yield	1.98%	'	'
Securities Held to Maturity	'	'	'
One year or less	0	'	'
Over one year through five years	1,312,389	'	'
Over five years through ten years	46,838	'	'
Over ten years	0	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	1,415,421	1,464,732	1,523,792
Weighted Average Yield	1.60%	'	'
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	'4 years 1 month 5 days	'	'
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency	'	'	'
Schedule of Available-for-Sale and Held-to-Maturity Securities [Line Items]	'	'	'
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	'1 year 11 months 27 days	'	'
Securities Available for Sale	'	'	'
One year or less	0	'	'
Over one year through five years	7	'	'
Over five years through ten years	0	'	'
Over ten years	0	'	'
Weighted-Average Yield	3.48%	'	'
Securities Held to Maturity	'	'	'
One year or less	0	'	'
Over one year through five years	0	'	'
Over five years through ten years	0	'	'
Over ten years	0	'	'
Held-to-maturity Securities, Fair Value	0	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	0	'	'
Weighted Average Yield	0.00%	'	'
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'	'	'
Schedule of Available-for-Sale and Held-to-Maturity Securities [Line Items]	'	'	'
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	'3 years 8 months 9 days	'	'
Securities Available for Sale	'	'	'
One year or less	0	'	'
Over one year through five years	154,809	'	'
Over five years through ten years	39,208	'	'
Over ten years	0	'	'
Weighted-Average Yield	1.97%	'	'
Securities Held to Maturity	'	'	'
One year or less	0	'	'
Over one year through five years	159,582	'	'
Over five years through ten years	90,630	'	'
Over ten years	0	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	258,436	240,069	220,410
Weighted Average Yield	2.28%	'	'
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	'4 years 9 months 12 days	'	'
Collateralized Loan Obligations	'	'	'
Schedule of Available-for-Sale and Held-to-Maturity Securities [Line Items]	'	'	'
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	'6 years 0 months 22 days	'	'
Securities Available for Sale	'	'	'
One year or less	7,501	'	'
Over one year through five years	0	'	'
Over five years through ten years	282,920	'	'
Over ten years	0	'	'
Weighted-Average Yield	2.61%	'	'
Securities Held to Maturity	'	'	'
One year or less	0	'	'
Over one year through five years	0	'	'
Over five years through ten years	0	'	'
Over ten years	0	'	'
Held-to-maturity Securities, Fair Value	0	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	0	'	'
Weighted Average Yield	0.00%	'	'
Corporate debt securities	'	'	'
Schedule of Available-for-Sale and Held-to-Maturity Securities [Line Items]	'	'	'
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	'13 years 0 months 22 days	'	'
Securities Available for Sale	'	'	'
One year or less	0	'	'
Over one year through five years	0	'	'
Over five years through ten years	0	'	'
Over ten years	54,594	'	'
Weighted-Average Yield	0.95%	'	'
Securities Held to Maturity	'	'	'
One year or less	0	'	'
Over one year through five years	91,776	'	'
Over five years through ten years	0	'	'
Over ten years	0	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	$91,467	$93,628	$94,343
Weighted Average Yield	2.22%	'	'
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	'3 years 3 months 12 days	'	'

Investment_Securities_Narrativ

Investment Securities (Narrative) (Details Textual) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Schedule of Investments [Line Items]	'	'	'
Available for sale securities, net unrealized losses	($31,800,000)	($55,900,000)	($29,900,000)
Number of states with aggregate fair value of general obligation bonds greater than $10 million	11	'	'
Available-for-sale Securities, Gross Unrealized Loss at End of Period	64,610,000	90,220,000	70,462,000
Number of Single Issuer Trust Preferred Securities With Stated Maturities	8	'	'
Percent of trust preferred securities included in fair value of entire investment portfolio	2.00%	'	'
Available-for-sale	3,462,990,000	3,273,174,000	3,256,259,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	64,610,000	90,220,000	70,462,000
Total number of states general obligation bonds are held	37	'	'
Maximum portfolio concentration in municipal securities per corporate investment policy	20.00%	'	'
Other investment securities pledged	3,300,000,000	3,200,000,000	3,400,000,000
Amount of municipal securities with a combined individual state to total municipal outstanding equal to or less than, per corporate policy	25.00%	'	'
12 states	'	'	'
Schedule of Investments [Line Items]	'	'	'
General obligation bonds, aggregate fair value	10,000,000	'	'
Collateralized Loan Obligations	'	'	'
Schedule of Investments [Line Items]	'	'	'
Available-for-sale Securities, Gross Unrealized Loss at End of Period	7,257,000	4,332,000	3,295,000
Available-for-sale	290,421,000	293,687,000	268,632,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$7,257,000	$4,332,000	$3,295,000

Loans_Schedule_of_accounts_Not

Loans Schedule of accounts, Notes, Loans and Financing Receivables (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans and Leases Receivable, Gross, Commercial	$9,160,729	$8,750,109	$8,806,340
Loans and Leases Receivable, Gross, Consumer, Mortgage	1,059,735	1,050,584	1,006,673
Loans and Leases Receivable, Gross, Consumer, Installment, Other	3,092,501	2,738,656	2,733,754
Loans and Leases Receivable, Gross, Consumer, Home Equity	1,398,266	1,311,932	1,299,063
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	160,113	148,313	145,113
Loans and Leases Receivable, Gross, Consumer, Lease Financing	339,936	239,551	199,907
FDIC Indemnification Asset	30,746	61,827	69,986
Loans and Leases Receivable, Gross	15,242,026	14,300,972	14,260,836
Allowance for loan losses	-140,077	-141,252	-143,835
Net loans	15,101,949	14,159,720	14,117,001
Originated Loans	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans and Leases Receivable, Gross, Commercial	7,626,166	6,648,279	6,420,369
Loans and Leases Receivable, Gross, Consumer, Mortgage	605,998	529,253	487,283
Loans and Leases Receivable, Gross, Consumer, Installment, Other	2,277,533	1,727,925	1,647,095
Loans and Leases Receivable, Gross, Consumer, Home Equity	1,062,013	920,066	889,372
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	160,113	148,313	145,113
Loans and Leases Receivable, Gross, Consumer, Lease Financing	339,936	239,551	199,907
Loans and Leases Receivable, Gross	12,071,759	10,213,387	9,789,139
Allowance for loan losses	-90,883	-96,484	-98,291
Net loans	11,980,876	10,116,903	9,690,848
Acquired Loans	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans and Leases Receivable, Gross, Commercial	1,272,244	1,725,970	1,963,746
Loans and Leases Receivable, Gross, Consumer, Mortgage	410,065	470,652	466,594
Loans and Leases Receivable, Gross, Consumer, Installment, Other	809,820	1,004,569	1,080,298
Loans and Leases Receivable, Gross, Consumer, Home Equity	252,975	294,424	306,783
Loans and Leases Receivable, Gross	2,745,104	3,495,615	3,817,421
Allowance for loan losses	-6,206	-741	0
Net loans	2,738,898	3,494,874	3,817,421
Covered Loans	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans and Leases Receivable, Gross, Commercial	262,319	375,860	422,225
Loans and Leases Receivable, Gross, Consumer, Mortgage	43,672	50,679	52,796
Loans and Leases Receivable, Gross, Consumer, Installment, Other	5,148	6,162	6,361
Loans and Leases Receivable, Gross, Consumer, Home Equity	83,278	97,442	102,908
FDIC Indemnification Asset	30,746	61,827	69,986
Loans and Leases Receivable, Gross, Carrying Amount, Covered	425,163	591,970	654,276
Loans and Leases Receivable, Allowance, Covered	-42,988	-44,027	-45,544
Loans and Leases Receivable, Net Reported Amount, Covered	$382,175	$547,943	$608,732

Loans_acquired_impaired_loans_

Loans acquired impaired loans accretable yield and carrying amount (Details) (USD $)

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2014

Sep. 30, 2013

Apr. 12, 2013

Acquired Impaired Loans

Acquired Impaired Loans

Acquired Impaired Loans

Acquired Impaired Loans

Acquired Impaired Loans

Acquired Impaired Loans

Acquired Impaired Loans

Acquired Impaired Loans

Citizens Republic Bancorp

Citizens Republic Bancorp

Citizens Republic Bancorp

Acquired Impaired Loans

Acquired Impaired Loans

Acquired Impaired Loans

Changes in the Carrying Amount of Accretable Yield for Acquired Impaired Loans [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance

$659,700,000

$902,900,000

'

'

'

'

'

'

'

'

'

'

'

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield

'

'

126,424,000

106,607,000

126,424,000

106,607,000

137,442,000

136,646,000

120,067,000

0

0

0

131,558,000

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net

'

'

479,050,000

670,867,000

479,050,000

670,867,000

519,250,000

601,000,000

752,682,000

0

0

0

819,715,000

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion

'

'

-12,950,000

-8,914,000

-37,437,000

-18,004,000

'

'

'

'

'

'

'

Certain Loans Acquired in Transfer not Accounted for as Debt Securities Carrying Amount Accretion

'

'

12,950,000

8,914,000

37,437,000

18,004,000

'

'

'

'

'

'

'

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference

'

'

6,646,000

0

36,659,000

0

'

'

'

'

'

'

'

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities F D I C Payments Received under Loss Sharing Agreement

'

'

-53,150,000

-90,729,000

-159,387,000

-166,852,000

'

'

'

'

'

'

'

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans

'

'

($4,714,000)

($4,546,000)

($9,444,000)

($6,947,000)

'

'

'

'

'

'

'

Loans_Covered_loans_loss_share

Loans Covered loans loss share receivable (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Changes in Loss Share Receivable Associated with Covered Loans [Line Items]	'	'	'	'	'	'	'	'
Loans and Leases Receivable, Gross	$15,242,026	$14,260,836	$15,242,026	$14,260,836	'	$14,300,972	'	'
Covered impaired loan [Member]	'	'	'	'	'	'	'	'
Changes in Loss Share Receivable Associated with Covered Loans [Line Items]	'	'	'	'	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount, Covered	520,300	811,300	520,300	811,300	'	'	'	'
Loss Share Receivable	'	'	'	'	'	'	'	'
Changes in Loss Share Receivable Associated with Covered Loans [Line Items]	'	'	'	'	'	'	'	'
Covered Loans and Leases Receivable Gross	'	'	'	'	43,981	61,827	83,910	113,734
Covered Loans and Leasses Receivable Accretion	-6,932	-5,226	-16,980	-19,327	'	'	'	'
Covered Loans and Leases Receivable Increase Due to Impairment	2,908	1,032	3,835	8,890	'	'	'	'
Covered Loans and Leases Receivable FDIC Reimbursement	-7,006	-7,284	-13,330	-23,231	'	'	'	'
Covered Loans and Leases Receivable Paid in Full	-2,205	-2,446	-4,606	-10,080	'	'	'	'
Covered Loans Loss Share Receivable	30,746	69,986	30,746	69,986	'	'	'	'
Covered Loans	'	'	'	'	'	'	'	'
Changes in Loss Share Receivable Associated with Covered Loans [Line Items]	'	'	'	'	'	'	'	'
Loans and Leases Receivable, Gross, Carrying Amount, Covered	$425,163	$654,276	$425,163	$654,276	'	$591,970	'	'

Loans_Changes_in_the_Carrying_

Loans Changes in the Carrying Amount and Accretable Yield for Covered Loans (Details) (Covered impaired loan [Member], USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Covered impaired loan [Member]	'	'	'	'	'	'	'	'
Changes in the carrying amount of accretable yield for covered loans [Line Items]	'	'	'	'	'	'	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield	$51,945	$79,138	$51,945	$79,138	$53,655	$67,282	$81,758	$113,288
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	284,566	447,799	284,566	447,799	316,481	403,692	537,257	762,386
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	-9,683	-14,056	-34,438	-51,327	'	'	'	'
Certain Loans Acquired in Transfer not Accounted for as Debt Securities Carrying Amount Accretion	9,683	14,056	34,438	51,327	'	'	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	8,684	12,745	20,290	28,726	'	'	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities F D I C Payments Received under Loss Sharing Agreement	-41,598	-103,514	-153,564	-365,914	'	'	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans	($711)	($1,309)	($1,189)	($11,549)	'	'	'	'

Loans_Schedules_of_past_due_re

Loans Schedules of past due receivables (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Consumer Loans Guaranteed by Government	$2,500,000	$2,100,000	$2,900,000
FDIC Indemnification Asset	30,746,000	61,827,000	69,986,000
Covered Loans	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
FDIC Indemnification Asset	30,746,000	61,827,000	69,986,000
Covered Loans	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	10,554,000	13,922,000	15,893,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	2,241,000	9,881,000	7,089,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	92,534,000	143,238,000	164,075,000
Financing Receivable, Recorded Investment, Past Due	105,329,000	167,041,000	187,057,000
Financing Receivable, Recorded Investment, Current	289,088,000	363,102,000	397,233,000
Financing Receivable, Net	394,417,000	530,143,000	584,290,000
Covered Loans | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	288,000	836,000	3,729,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0	1,489,000	730,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	6,535,000	12,957,000	12,493,000
Financing Receivable, Recorded Investment, Past Due	6,823,000	15,282,000	16,952,000
Financing Receivable, Recorded Investment, Current	49,253,000	60,955,000	66,287,000
Financing Receivable, Net	56,076,000	76,237,000	83,239,000
Covered Loans | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	1,656,000	2,855,000	1,299,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	1,524,000	3,443,000	5,672,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	66,219,000	103,077,000	117,839,000
Financing Receivable, Recorded Investment, Past Due	69,399,000	109,375,000	124,810,000
Financing Receivable, Recorded Investment, Current	123,347,000	164,219,000	184,087,000
Financing Receivable, Net	192,746,000	273,594,000	308,897,000
Covered Loans | Commercial Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	0	2,191,000	943,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0	1,917,000	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	11,981,000	20,388,000	25,996,000
Financing Receivable, Recorded Investment, Past Due	11,981,000	24,496,000	26,939,000
Financing Receivable, Recorded Investment, Current	1,516,000	1,533,000	3,150,000
Financing Receivable, Net	13,497,000	26,029,000	30,089,000
Covered Loans | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Installment	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	67,000	33,000	57,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0	0	4,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0	0
Financing Receivable, Recorded Investment, Past Due	67,000	33,000	61,000
Financing Receivable, Recorded Investment, Current	5,081,000	6,130,000	6,300,000
Financing Receivable, Net	5,148,000	6,163,000	6,361,000
Covered Loans | Consumer Home Equity Lines Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	2,327,000	544,000	1,532,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	315,000	1,467,000	22,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	4,065,000	1,651,000	1,781,000
Financing Receivable, Recorded Investment, Past Due	6,707,000	3,662,000	3,335,000
Financing Receivable, Recorded Investment, Current	76,571,000	93,780,000	99,574,000
Financing Receivable, Net	83,278,000	97,442,000	102,909,000
Covered Loans | Consumer Residential Mortgages Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	6,216,000	7,463,000	8,333,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	402,000	1,565,000	661,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	3,734,000	5,165,000	5,966,000
Financing Receivable, Recorded Investment, Past Due	10,352,000	14,193,000	14,960,000
Financing Receivable, Recorded Investment, Current	33,320,000	36,485,000	37,835,000
Financing Receivable, Net	43,672,000	50,678,000	52,795,000
Originated Loans	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	32,493,000	52,585,000	32,278,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	8,933,000	10,926,000	13,398,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	22,669,000	35,888,000	30,471,000
Financing Receivable, Recorded Investment, Past Due	64,095,000	99,399,000	76,147,000
Financing Receivable, Recorded Investment, Current	12,007,664,000	10,113,988,000	9,712,992,000
Financing Receivable, Net	12,071,759,000	10,213,387,000	9,789,139,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	8,538,000	11,176,000	12,452,000
Financing Receivable, Recorded Investment, Nonaccrual Status	39,321,000	42,203,000	35,588,000
Originated Loans | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	1,833,000	8,941,000	3,571,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	321,000	994,000	3,889,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	3,302,000	10,622,000	4,931,000
Financing Receivable, Recorded Investment, Past Due	5,456,000	20,557,000	12,391,000
Financing Receivable, Recorded Investment, Current	5,033,864,000	4,119,010,000	3,851,704,000
Financing Receivable, Net	5,039,320,000	4,139,567,000	3,864,095,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	120,000	151,000	201,000
Financing Receivable, Recorded Investment, Nonaccrual Status	12,124,000	11,323,000	5,234,000
Originated Loans | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	4,111,000	4,507,000	2,794,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	1,251,000	2,400,000	1,414,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	5,918,000	9,688,000	8,976,000
Financing Receivable, Recorded Investment, Past Due	11,280,000	16,595,000	13,184,000
Financing Receivable, Recorded Investment, Current	2,108,454,000	2,153,192,000	2,214,228,000
Financing Receivable, Net	2,119,734,000	2,169,787,000	2,227,412,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	523,000	460,000	1,047,000
Financing Receivable, Recorded Investment, Nonaccrual Status	10,223,000	14,229,000	13,821,000
Originated Loans | Commercial Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	255,000	351,000	0
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0	21,000	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	66,000	24,000
Financing Receivable, Recorded Investment, Past Due	255,000	438,000	24,000
Financing Receivable, Recorded Investment, Current	466,857,000	338,487,000	328,838,000
Financing Receivable, Net	467,112,000	338,925,000	328,862,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	0	122,000	85,000
Originated Loans | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	0	902,000	726,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0	0
Financing Receivable, Recorded Investment, Past Due	0	902,000	726,000
Financing Receivable, Recorded Investment, Current	339,936,000	238,649,000	199,181,000
Financing Receivable, Net	339,936,000	239,551,000	199,907,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0	0
Originated Loans | Installment	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	12,040,000	15,433,000	9,825,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	3,553,000	4,050,000	3,392,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	4,353,000	4,462,000	5,378,000
Financing Receivable, Recorded Investment, Past Due	19,946,000	23,945,000	18,595,000
Financing Receivable, Recorded Investment, Current	2,257,587,000	1,703,980,000	1,628,500,000
Financing Receivable, Net	2,277,533,000	1,727,925,000	1,647,095,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	3,630,000	3,735,000	4,506,000
Financing Receivable, Recorded Investment, Nonaccrual Status	3,205,000	3,681,000	3,894,000
Originated Loans | Consumer Home Equity Lines Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	1,975,000	1,864,000	1,094,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	538,000	918,000	498,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	705,000	965,000	1,118,000
Financing Receivable, Recorded Investment, Past Due	3,218,000	3,747,000	2,710,000
Financing Receivable, Recorded Investment, Current	1,058,795,000	916,319,000	886,662,000
Financing Receivable, Net	1,062,013,000	920,066,000	889,372,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	390,000	418,000	500,000
Financing Receivable, Recorded Investment, Nonaccrual Status	1,426,000	1,819,000	2,038,000
Originated Loans | Consumer Credit Card	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	746,000	729,000	781,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	434,000	471,000	434,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	688,000	735,000	700,000
Financing Receivable, Recorded Investment, Past Due	1,868,000	1,935,000	1,915,000
Financing Receivable, Recorded Investment, Current	158,245,000	146,378,000	143,198,000
Financing Receivable, Net	160,113,000	148,313,000	145,113,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	423,000	404,000	365,000
Financing Receivable, Recorded Investment, Nonaccrual Status	412,000	558,000	422,000
Originated Loans | Consumer Residential Mortgages Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	11,533,000	19,858,000	13,487,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	2,836,000	2,072,000	3,771,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	7,703,000	9,350,000	9,344,000
Financing Receivable, Recorded Investment, Past Due	22,072,000	31,280,000	26,602,000
Financing Receivable, Recorded Investment, Current	583,926,000	497,973,000	460,681,000
Financing Receivable, Net	605,998,000	529,253,000	487,283,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	3,452,000	6,008,000	5,833,000
Financing Receivable, Recorded Investment, Nonaccrual Status	11,931,000	10,471,000	10,094,000
Acquired Loans	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	17,939,000	32,793,000	38,184,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	13,869,000	13,578,000	10,199,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	36,393,000	45,133,000	43,285,000
Financing Receivable, Recorded Investment, Past Due	68,201,000	91,504,000	91,668,000
Financing Receivable, Recorded Investment, Current	2,676,903,000	3,404,111,000	3,725,753,000
Financing Receivable, Net	2,745,104,000	3,495,615,000	3,817,421,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	2,711,000	4,148,000	2,719,000
Financing Receivable, Recorded Investment, Nonaccrual Status	5,992,000	4,007,000	5,904,000
Acquired Loans | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	626,000	1,295,000	2,107,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	5,478,000	862,000	331,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	5,303,000	3,744,000	2,325,000
Financing Receivable, Recorded Investment, Past Due	11,407,000	5,901,000	4,763,000
Financing Receivable, Recorded Investment, Current	540,082,000	788,178,000	972,898,000
Financing Receivable, Net	551,489,000	794,079,000	977,661,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	40,000	0
Financing Receivable, Recorded Investment, Nonaccrual Status	876,000	795,000	2,029,000
Acquired Loans | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	4,568,000	5,603,000	3,068,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	2,269,000	5,281,000	2,816,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	20,776,000	26,366,000	25,268,000
Financing Receivable, Recorded Investment, Past Due	27,613,000	37,250,000	31,152,000
Financing Receivable, Recorded Investment, Current	682,882,000	881,395,000	936,751,000
Financing Receivable, Net	710,495,000	918,645,000	967,903,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	370,000	403,000	0
Financing Receivable, Recorded Investment, Nonaccrual Status	2,072,000	651,000	0
Acquired Loans | Commercial Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	3,179,000	2,675,000	0
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	687,000	0	0
Financing Receivable, Recorded Investment, Past Due	3,866,000	2,675,000	0
Financing Receivable, Recorded Investment, Current	6,394,000	10,571,000	18,182,000
Financing Receivable, Net	10,260,000	13,246,000	18,182,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0	0
Acquired Loans | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Installment	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	6,764,000	14,528,000	10,883,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	2,164,000	4,076,000	2,866,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	1,045,000	3,354,000	1,446,000
Financing Receivable, Recorded Investment, Past Due	9,973,000	21,958,000	15,195,000
Financing Receivable, Recorded Investment, Current	799,847,000	982,611,000	1,065,103,000
Financing Receivable, Net	809,820,000	1,004,569,000	1,080,298,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	542,000	2,263,000	0
Financing Receivable, Recorded Investment, Nonaccrual Status	1,059,000	679,000	954,000
Acquired Loans | Consumer Home Equity Lines Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	2,540,000	4,774,000	3,779,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	1,234,000	1,933,000	982,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	2,872,000	3,606,000	3,522,000
Financing Receivable, Recorded Investment, Past Due	6,646,000	10,313,000	8,283,000
Financing Receivable, Recorded Investment, Current	246,329,000	284,111,000	298,500,000
Financing Receivable, Net	252,975,000	294,424,000	306,783,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	1,279,000	1,039,000	0
Financing Receivable, Recorded Investment, Nonaccrual Status	680,000	1,300,000	2,184,000
Acquired Loans | Consumer Residential Mortgages Financing Receivable	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	262,000	3,918,000	18,347,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	2,724,000	1,426,000	3,204,000
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	5,710,000	8,063,000	10,724,000
Financing Receivable, Recorded Investment, Past Due	8,696,000	13,407,000	32,275,000
Financing Receivable, Recorded Investment, Current	401,369,000	457,245,000	434,319,000
Financing Receivable, Net	410,065,000	470,652,000	466,594,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	520,000	403,000	2,719,000
Financing Receivable, Recorded Investment, Nonaccrual Status	$1,305,000	$582,000	$737,000

Loans_Financing_receivables_cr

Loans Financing receivables credit quality indicators (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Covered Loans	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	$394,417	$530,143	$584,290
Covered Loans | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	56,076	76,237	83,239
Covered Loans | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	192,746	273,594	308,897
Covered Loans | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	13,497	26,029	30,089
Covered Loans | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	262,319	375,860	422,225
Covered Loans | Grade One | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade One | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade One | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade One | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade One | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Two | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	1,373	968	996
Covered Loans | Grade Two | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Two | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Two | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Two | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	1,373	968	996
Covered Loans | Grade Three | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Three | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Three | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Three | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Three | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Four | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	40,902	41,115	45,557
Covered Loans | Grade Four | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	101,360	113,863	116,056
Covered Loans | Grade Four | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	686	601	601
Covered Loans | Grade Four | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Four | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	142,948	155,579	162,214
Covered Loans | Grade Five | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	1,245	427	624
Covered Loans | Grade Five | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	3,908	6,219	15,364
Covered Loans | Grade Five | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	943
Covered Loans | Grade Five | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Five | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	5,153	6,646	16,931
Covered Loans | Grade Six | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	12,556	31,621	33,957
Covered Loans | Grade Six | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	87,478	153,318	176,286
Covered Loans | Grade Six | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	12,659	23,208	26,401
Covered Loans | Grade Six | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Six | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	112,693	208,147	236,644
Covered Loans | Grade Seven | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	2,106	2,105
Covered Loans | Grade Seven | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	194	1,191
Covered Loans | Grade Seven | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	152	2,220	2,144
Covered Loans | Grade Seven | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Covered Loans | Grade Seven | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	152	4,520	5,440
Acquired Loans	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	2,745,104	3,495,615	3,817,421
Acquired Loans | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	551,489	794,079	977,661
Acquired Loans | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	710,495	918,645	967,903
Acquired Loans | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	10,260	13,246	18,182
Acquired Loans | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	1,272,244	1,725,970	1,963,746
Acquired Loans | Grade One | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade One | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade One | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade One | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade One | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Two | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	1,741	96
Acquired Loans | Grade Two | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	703	0
Acquired Loans | Grade Two | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Two | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Two | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	2,444	96
Acquired Loans | Grade Three | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	14,464	79,634	27,827
Acquired Loans | Grade Three | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	26,216	29,224	29,123
Acquired Loans | Grade Three | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Three | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Three | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	40,680	108,858	56,950
Acquired Loans | Grade Four | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	492,667	643,495	849,858
Acquired Loans | Grade Four | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	592,969	722,307	744,362
Acquired Loans | Grade Four | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	10,260	13,246	18,182
Acquired Loans | Grade Four | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Four | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	1,095,896	1,379,048	1,612,402
Acquired Loans | Grade Five | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	19,672	46,807	55,558
Acquired Loans | Grade Five | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	44,570	93,499	102,256
Acquired Loans | Grade Five | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Five | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Five | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	64,242	140,306	157,814
Acquired Loans | Grade Six | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	24,686	22,402	44,322
Acquired Loans | Grade Six | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	46,740	72,912	92,162
Acquired Loans | Grade Six | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Six | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Six | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	71,426	95,314	136,484
Acquired Loans | Grade Seven | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Seven | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Seven | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Seven | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Seven | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Originated Loans	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	12,071,759	10,213,387	9,789,139
Originated Loans | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	5,039,320	4,139,567	3,864,095
Originated Loans | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	2,119,734	2,169,787	2,227,412
Originated Loans | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	467,112	338,925	328,862
Originated Loans | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	339,936	239,551	199,907
Originated Loans | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	7,966,102	6,887,830	6,620,276
Originated Loans | Grade One	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	'	'	43,292
Originated Loans | Grade One | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	42,653	34,909	32,144
Originated Loans | Grade One | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	695	241	1,216
Originated Loans | Grade One | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Originated Loans | Grade One | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	8,929	9,271	9,932
Originated Loans | Grade One | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	52,277	44,421	'
Originated Loans | Grade Two | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	214,307	108,709	82,906
Originated Loans | Grade Two | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	3,523	3,730	3,711
Originated Loans | Grade Two | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Originated Loans | Grade Two | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	12,525	2,900	3,173
Originated Loans | Grade Two | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	230,355	115,339	89,790
Originated Loans | Grade Three | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	1,164,149	802,624	867,186
Originated Loans | Grade Three | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	285,652	315,150	368,918
Originated Loans | Grade Three | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	36,953	25,632	27,041
Originated Loans | Grade Three | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	58,157	54,446	29,631
Originated Loans | Grade Three | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	1,544,911	1,197,852	1,292,776
Originated Loans | Grade Four | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	3,458,074	3,083,458	2,796,101
Originated Loans | Grade Four | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	1,761,138	1,759,383	1,770,768
Originated Loans | Grade Four | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	420,721	306,795	300,154
Originated Loans | Grade Four | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	258,880	167,022	152,778
Originated Loans | Grade Four | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	5,898,813	5,316,658	5,019,801
Originated Loans | Grade Five | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	119,252	71,857	48,912
Originated Loans | Grade Five | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	29,410	34,969	30,502
Originated Loans | Grade Five | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	9,359	267	323
Originated Loans | Grade Five | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	1,233	5,750	3,325
Originated Loans | Grade Five | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	159,254	112,843	83,062
Originated Loans | Grade Six | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	40,885	38,010	36,846
Originated Loans | Grade Six | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	39,316	56,314	52,297
Originated Loans | Grade Six | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	79	6,231	1,344
Originated Loans | Grade Six | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	212	162	1,068
Originated Loans | Grade Six | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	80,492	100,717	91,555
Originated Loans | Grade Seven | Commercial and Industrial	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Originated Loans | Grade Seven | Commercial Real Estate Other Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Originated Loans | Grade Seven | Commercial Real Estate Construction Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Originated Loans | Grade Seven | Commercial Leases Financing Receivable	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	0	0	0
Originated Loans | Grade Seven | Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Financing Receivable, Net	$0	$0	$0

Loans_Loans_narrative_Details

Loans Loans narrative (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Loans narrative [Abstract]	'	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	$659.70	'	$902.90
Time period for non-payment of loans that are placed on non-accrual status	'90 days	'	'
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	($6.40)	($6.60)	($7.50)
Days past due for nonaccrual status credit card loans	'120 days	'	'

Allowance_for_Loan_Losses_Sche

Allowance for Loan Losses Schedule of Credit Losses Related to Financing Receivables, Current and Non-Current (Details) (USD $)

3 Months Ended

9 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2012

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Write-downs

$3,200

'

$12,600

'

'

'

'

'

Provision for Loan, Lease, and Other Losses

-9,192

-6,379

-38,982

-23,634

'

'

'

'

Originated Loans

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment

'

4,136

'

4,136

'

6,146

'

'

Financing Receivable, Allowance for Credit Losses

90,883

98,291

90,883

98,291

91,950

96,484

98,645

98,942

Financing Receivable, Allowance for Credit Losses, Write-downs

-11,410

-8,515

-35,718

-30,260

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Recovery

5,481

5,638

15,608

18,127

'

'

'

'

Provision for Loan, Lease, and Other Losses

4,862

2,523

14,509

11,482

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment

84,831

94,155

84,831

94,155

'

90,338

'

'

Impaired Financing Receivable, Related Allowance

6,052

'

6,052

'

'

'

'

'

Financing Receivable, Individually Evaluated for Impairment

91,971

89,901

91,971

89,901

'

87,764

'

'

Financing Receivable, Collectively Evaluated for Impairment

11,979,788

9,699,238

11,979,788

9,699,238

'

10,125,623

'

'

Financing Receivable, Net

12,071,759

9,789,139

12,071,759

9,789,139

'

10,213,387

'

'

Originated Loans | Consumer Residential Mortgages Financing Receivable

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Net

605,998

487,283

605,998

487,283

'

529,253

'

'

Originated Loans | Consumer Credit Card

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Net

160,113

145,113

160,113

145,113

'

148,313

'

'

Originated Loans | Commercial Portfolio Segmen

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment

'

1,336

'

1,336

'

3,235

'

'

Financing Receivable, Allowance for Credit Losses

37,125

43,178

37,125

43,178

43,256

42,981

45,167

36,209

Financing Receivable, Allowance for Credit Losses, Write-downs

-3,569

-1,011

-9,203

-5,114

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Recovery

1,262

1,162

2,681

5,745

'

'

'

'

Provision for Loan, Lease, and Other Losses

-3,824

-2,140

666

6,338

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment

35,726

41,842

35,726

41,842

'

39,746

'

'

Financing Receivable, Individually Evaluated for Impairment

11,155

7,476

11,155

7,476

'

8,053

'

'

Financing Receivable, Collectively Evaluated for Impairment

5,028,165

3,856,619

5,028,165

3,856,619

'

4,131,514

'

'

Financing Receivable, Net

5,039,320

3,864,095

5,039,320

3,864,095

'

4,139,567

'

'

Originated Loans | Commercial Real Estate Portfolio Segment

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment

'

488

'

488

'

229

'

'

Financing Receivable, Allowance for Credit Losses

8,446

15,148

8,446

15,148

8,730

12,265

16,823

20,126

Financing Receivable, Allowance for Credit Losses, Write-downs

-570

-211

-3,345

-1,014

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Recovery

43

168

77

503

'

'

'

'

Provision for Loan, Lease, and Other Losses

243

-1,632

-551

-4,467

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment

6,826

14,660

6,826

14,660

'

12,036

'

'

Financing Receivable, Individually Evaluated for Impairment

22,597

19,755

22,597

19,755

'

20,616

'

'

Financing Receivable, Collectively Evaluated for Impairment

2,097,137

2,207,657

2,097,137

2,207,657

'

2,149,171

'

'

Financing Receivable, Net

2,119,734

2,227,412

2,119,734

2,227,412

'

2,169,787

'

'

Originated Loans | Commercial Construction Financing Receivable Portfolio Segment

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment

'

0

'

0

'

0

'

'

Financing Receivable, Allowance for Credit Losses

1,498

2,705

1,498

2,705

1,323

2,810

2,044

3,821

Financing Receivable, Allowance for Credit Losses, Write-downs

0

0

0

-516

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Recovery

5

394

35

483

'

'

'

'

Provision for Loan, Lease, and Other Losses

170

267

-1,347

-1,083

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment

1,498

2,705

1,498

2,705

'

2,810

'

'

Financing Receivable, Individually Evaluated for Impairment

0

958

0

958

'

906

'

'

Financing Receivable, Collectively Evaluated for Impairment

467,112

327,904

467,112

327,904

'

338,019

'

'

Financing Receivable, Net

467,112

328,862

467,112

328,862

'

338,925

'

'

Originated Loans | Finance Leases Portfolio Segment

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment

'

0

'

0

'

0

'

'

Financing Receivable, Allowance for Credit Losses

736

1,019

736

1,019

1,028

1,081

909

639

Financing Receivable, Allowance for Credit Losses, Write-downs

0

0

0

-1,237

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Recovery

2

11

374

100

'

'

'

'

Provision for Loan, Lease, and Other Losses

-294

99

-719

1,517

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment

736

1,019

736

1,019

'

1,081

'

'

Impaired Financing Receivable, Related Allowance

0

'

0

'

'

'

'

'

Financing Receivable, Individually Evaluated for Impairment

0

0

0

0

'

0

'

'

Financing Receivable, Collectively Evaluated for Impairment

339,936

199,907

339,936

199,907

'

239,551

'

'

Financing Receivable, Net

339,936

199,907

339,936

199,907

'

239,551

'

'

Originated Loans | Installment Financing Receivable Portfolio Segment

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment

'

552

'

552

'

1,014

'

'

Financing Receivable, Allowance for Credit Losses

13,660

10,477

13,660

10,477

12,243

11,935

8,725

11,154

Financing Receivable, Allowance for Credit Losses, Write-downs

-5,041

-3,582

-14,739

-11,788

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Recovery

2,944

2,624

8,735

7,859

'

'

'

'

Provision for Loan, Lease, and Other Losses

3,514

2,710

7,729

3,252

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment

12,574

9,925

12,574

9,925

'

10,921

'

'

Financing Receivable, Individually Evaluated for Impairment

23,575

30,608

23,575

30,608

'

27,285

'

'

Financing Receivable, Collectively Evaluated for Impairment

2,253,958

1,616,487

2,253,958

1,616,487

'

1,700,640

'

'

Financing Receivable, Net

2,277,533

1,647,095

2,277,533

1,647,095

'

1,727,925

'

'

Originated Loans | Home Equity Receivable Portfolio Segment

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment

'

197

'

197

'

223

'

'

Financing Receivable, Allowance for Credit Losses

17,898

12,887

17,898

12,887

13,903

12,900

13,266

13,724

Financing Receivable, Allowance for Credit Losses, Write-downs

-1,361

-1,843

-3,403

-5,177

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Recovery

708

802

2,227

1,884

'

'

'

'

Provision for Loan, Lease, and Other Losses

4,648

662

6,174

2,456

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment

17,708

12,690

17,708

12,690

'

12,677

'

'

Financing Receivable, Individually Evaluated for Impairment

7,624

6,787

7,624

6,787

'

6,726

'

'

Financing Receivable, Collectively Evaluated for Impairment

1,054,389

882,585

1,054,389

882,585

'

913,340

'

'

Financing Receivable, Net

1,062,013

889,372

1,062,013

889,372

'

920,066

'

'

Originated Loans | Credit Card Receivables Portfolio Segment

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment

'

261

'

261

'

312

'

'

Financing Receivable, Allowance for Credit Losses

7,512

7,506

7,512

7,506

7,328

7,740

7,288

7,384

Financing Receivable, Allowance for Credit Losses, Write-downs

-778

-1,367

-3,544

-4,229

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Recovery

403

438

1,260

1,420

'

'

'

'

Provision for Loan, Lease, and Other Losses

559

1,147

2,056

2,931

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment

7,190

7,245

7,190

7,245

'

7,428

'

'

Financing Receivable, Individually Evaluated for Impairment

912

1,253

912

1,253

'

1,112

'

'

Financing Receivable, Collectively Evaluated for Impairment

159,201

143,860

159,201

143,860

'

147,201

'

'

Financing Receivable, Net

160,113

145,113

160,113

145,113

'

148,313

'

'

Originated Loans | Residential Portfolio Segment

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment

'

1,302

'

1,302

'

1,133

'

'

Financing Receivable, Allowance for Credit Losses

4,008

5,371

4,008

5,371

4,139

4,772

4,423

5,885

Financing Receivable, Allowance for Credit Losses, Write-downs

-91

-501

-1,484

-1,185

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Recovery

114

39

219

133

'

'

'

'

Provision for Loan, Lease, and Other Losses

-154

1,410

501

538

'

'

'

'

Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment

2,573

4,069

2,573

4,069

'

3,639

'

'

Financing Receivable, Individually Evaluated for Impairment

26,108

23,064

26,108

23,064

'

23,066

'

'

Financing Receivable, Collectively Evaluated for Impairment

579,890

464,219

579,890

464,219

'

506,187

'

'

Financing Receivable, Net

605,998

487,283

605,998

487,283

'

529,253

'

'

Originated Loans | Commercial and Industrial

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

1,399

'

1,399

'

'

'

'

'

Financing Receivable, Net

5,039,320

3,864,095

5,039,320

3,864,095

'

4,139,567

'

'

Originated Loans | Commercial Real Estate

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

1,620

'

1,620

'

'

'

'

'

Originated Loans | Commercial Real Estate Construction Financing Receivable

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

0

'

0

'

'

'

'

'

Financing Receivable, Net

467,112

328,862

467,112

328,862

'

338,925

'

'

Originated Loans | Installment

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Net

2,277,533

1,647,095

2,277,533

1,647,095

'

1,727,925

'

'

Originated Loans | Home equity lines

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Financing Receivable, Net

1,062,013

889,372

1,062,013

889,372

'

920,066

'

'

Originated Loans

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

6,052

[1]

4,136

[1]

6,052

[1]

4,136

[1]

'

6,146

[1]

'

'

Originated Loans | Consumer Residential Mortgages Financing Receivable

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

'

1,302

[1]

'

1,302

[1]

'

1,133

[1]

'

'

Originated Loans | Consumer Credit Card

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

'

261

[1]

'

261

[1]

'

312

[1]

'

'

Originated Loans | Commercial and Industrial

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

'

1,336

[1]

'

1,336

[1]

'

3,235

[1]

'

'

Originated Loans | Commercial Real Estate

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

'

488

[1]

'

488

[1]

'

229

[1]

'

'

Originated Loans | Commercial Real Estate Construction Financing Receivable

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

'

0

[1]

'

0

[1]

'

0

[1]

'

'

Originated Loans | Installment

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

'

552

[1]

'

552

[1]

'

1,014

[1]

'

'

Originated Loans | Home equity lines

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

'

197

[1]

'

197

[1]

'

223

[1]

'

'

Total Tdr Allowance

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

7,088

7,621

7,088

7,621

'

7,201

'

'

Total Tdr Allowance | Originated Loans

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

3,756

3,342

3,756

3,342

'

3,379

'

'

Total Tdr Allowance | Consumer Residential Mortgages Financing Receivable

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

1,475

1,302

1,475

1,302

'

1,133

'

'

Total Tdr Allowance | Consumer Residential Mortgages Financing Receivable | Originated Consumer Loans

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

1,435

1,302

1,435

1,302

'

1,133

'

'

Total Tdr Allowance | Consumer Credit Card

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

322

261

322

261

'

312

'

'

Total Tdr Allowance | Consumer Credit Card | Originated Consumer Loans

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

322

261

322

261

'

312

'

'

Total Tdr Allowance | Consumer Installment

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

1,223

552

1,223

552

'

1,014

'

'

Total Tdr Allowance | Consumer Installment | Originated Consumer Loans

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

1,086

552

1,086

552

'

1,014

'

'

Total Tdr Allowance | Home equity lines

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

190

197

190

197

'

223

'

'

Total Tdr Allowance | Home equity lines | Originated Consumer Loans

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Related Allowance

$190

$197

$190

$197

'

$223

'

'

[1]

Note 1: These tables exclude loans fully charged off.Note 2: The differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.

Allowance_for_Loan_Losses_allo

Allowance for Loan Losses allowance for acquired impaired loan losses (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
					Acquired Loans	Acquired Loans	Acquired Loans	Acquired Loans
allowance for acquired impaired loan losses [Line Items]	'	'	'	'	'	'	'	'
Provision for Loan and Lease Losses	$9,192	$6,379	$38,982	$23,634	$1,229	$5,465	'	'
Financing Receivable, Allowance for Credit Losses	'	'	'	'	6,206	6,206	4,977	741
Allowance for Loan and Lease Losses, Write-offs	'	'	'	'	0	0	'	'
Financing Receivable, Allowance for Credit Losses, Recovery	'	'	'	'	$0	$0	'	'

Allowance_for_Loan_Losses_Sche1

Allowance for Loan Losses Schedule of Credit Losses on Financing Receivables, Current Period (Details) (Covered Loans, USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Covered Loans	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'
Balance at beginning of the period	$45,109	$49,069	$44,027	$43,255
Provision for Loan Losses Before Benefit Attributable to FDIC Loss Share Agreements	2,827	2,855	10,255	19,009
Benefit Attributable to FDIC Loss Share Agreements	-2,908	-1,032	-3,835	-8,890
Provision for Loan Lease and Other Losses Covered	-81	1,823	6,420	10,119
Increase in Indemnification Asset	2,908	1,032	3,835	8,890
Allowance for Loan and Lease Losses, Write-offs	-4,948	-6,380	-11,294	-16,720
Balance at end of the period	$42,988	$45,544	$42,988	$45,544

Allowance_for_Loan_Losses_Impa

Allowance for Loan Losses Impaired Financing Receivables (Details) (USD $)	9 Months Ended				12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Originated Loans	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	$6,052	[1]	$4,136	[1]	$6,146	[1]
Impaired Financing Receivable, Recorded Investment	91,971	[1]	88,002	[1]	87,764	[1]
Impaired Financing Receivable, Unpaid Principal Balance	109,479	[1]	104,973	[1]	104,244	[1]
Impaired Financing Receivable, Average Recorded Investment	94,957	[1]	100,763	[1]	93,702	[1]
Originated Loans | Commercial and Industrial	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	8,411	[1]	3,826	[1]	2,503	[1]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	15,740	[1]	7,887	[1]	6,679	[1]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	12,484	[1]	11,842	[1]	7,256	[1]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	2,744	[1]	3,650	[1]	5,551	[1]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	2,798	[1]	5,526	[1]	7,428	[1]
Impaired Financing Receivable, Related Allowance	'		1,336	[1]	3,235	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	2,896	[1]	3,829	[1]	5,009	[1]
Originated Loans | Commercial Real Estate	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	16,576	[1]	15,836	[1]	17,871	[1]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	22,625	[1]	21,921	[1]	23,709	[1]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	17,035	[1]	18,884	[1]	18,639	[1]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	6,021	[1]	3,920	[1]	2,744	[1]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	6,022	[1]	4,251	[1]	2,870	[1]
Impaired Financing Receivable, Related Allowance	'		488	[1]	229	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	3,381	[1]	4,126	[1]	2,836	[1]
Originated Loans | Commercial Real Estate Construction Financing Receivable	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	[1]	958	[1]	906	[1]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	[1]	1,237	[1]	1,179	[1]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0	[1]	1,851	[1]	1,035	[1]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	[1]	0	[1]	0	[1]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	[1]	0	[1]	0	[1]
Impaired Financing Receivable, Related Allowance	'		0	[1]	0	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	[1]	0	[1]	0	[1]
Originated Loans | Installment	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	3,899	[1]	3,051	[1]	2,813	[1]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	4,001	[1]	4,344	[1]	3,978	[1]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	3,959	[1]	3,521	[1]	3,338	[1]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	19,676	[1]	25,528	[1]	24,472	[1]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	20,314	[1]	25,616	[1]	24,558	[1]
Impaired Financing Receivable, Related Allowance	'		552	[1]	1,014	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	20,039	[1]	26,172	[1]	24,985	[1]
Originated Loans | Home equity lines	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,015	[1]	1,046	[1]	1,018	[1]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	2,045	[1]	1,386	[1]	1,347	[1]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	2,073	[1]	1,107	[1]	1,079	[1]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	5,609	[1]	5,869	[1]	5,707	[1]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	5,829	[1]	5,869	[1]	5,707	[1]
Impaired Financing Receivable, Related Allowance	'		197	[1]	223	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	5,779	[1]	6,017	[1]	5,874	[1]
Originated Loans | Consumer Credit Card	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	27	[1]	48	[1]	49	[1]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	27	[1]	48	[1]	49	[1]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	44	[1]	74	[1]	91	[1]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	885	[1]	1,205	[1]	1,064	[1]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	885	[1]	1,205	[1]	1,064	[1]
Impaired Financing Receivable, Related Allowance	'		261	[1]	312	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	981	[1]	1,352	[1]	1,238	[1]
Originated Loans | Consumer Residential Mortgages Financing Receivable	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	12,576	[1]	10,363	[1]	10,250	[1]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	15,552	[1]	12,899	[1]	12,778	[1]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	12,720	[1]	10,122	[1]	10,258	[1]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	13,532	[1]	12,702	[1]	12,816	[1]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	13,641	[1]	12,784	[1]	12,898	[1]
Impaired Financing Receivable, Related Allowance	'		1,302	[1]	1,133	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	13,566	[1]	11,866	[1]	12,064	[1]
Originated Loans | Total impaired loans with no related allowance	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	43,504	[1]	35,128	[1]	35,410	[1]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	59,990	[1]	49,722	[1]	49,719	[1]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	48,315	[1]	47,401	[1]	41,696	[1]
Originated Loans | Total impaired loans with a related allowance	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, with Related Allowance, Recorded Investment	48,467	[1]	52,874	[1]	52,354	[1]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	49,489	[1]	55,251	[1]	54,525	[1]
Impaired Financing Receivable, Related Allowance	6,052	[1]	4,136	[1]	6,146	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	46,642	[1]	53,362	[1]	52,006	[1]
Originated Loans	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	6,052		'		'
Originated Loans | Commercial and Industrial	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	1,399		'		'
Originated Loans | Commercial Real Estate	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	1,620		'		'
Originated Loans | Commercial Real Estate Construction Financing Receivable	'		'		'
Financing Receivable, Impaired [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	$0		'		'
[1]	Note 1: These tables exclude loans fully charged off.Note 2: The differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.

Allowance_for_Loan_Losses_Trou

Allowance for Loan Losses Troubled Debt Restructuring on Financing Receivables (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Loans and Leases Receivable, Impaired, Troubled Debt, Interest Income	$700,000		$600,000		$2,000,000		$2,400,000		'
Financing Receivable, Modifications, Recorded Investment	135,408,000		136,505,000		135,408,000		136,505,000		133,187,000
Financing Receiables, Modifications, Unpaid Principal Balance	178,848,000		185,435,000		178,848,000		185,435,000		184,293,000
financing receivables, modifications, number of contracts at period end	2,504		2,732		2,504		2,732		2,624
Commercial	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	2,853,000	[1]	6,998,000	[1]	2,853,000	[1]	6,998,000	[1]	5,559,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	11,655,000	[1]	11,916,000	[1]	11,655,000	[1]	11,916,000	[1]	9,996,000	[1]
financing receivables, modifications, number of contracts at period end	46		40		46		40		40
Commercial Real Estate	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	56,327,000	[1]	58,532,000	[1]	56,327,000	[1]	58,532,000	[1]	57,657,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	76,308,000	[1]	78,100,000	[1]	76,308,000	[1]	78,100,000	[1]	79,307,000	[1]
financing receivables, modifications, number of contracts at period end	89		73		89		73		77
Commercial Real Estate Construction Financing Receivable	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	650,000	[1]	4,998,000	[1]	650,000	[1]	4,998,000	[1]	5,049,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	10,899,000	[1]	25,033,000	[1]	10,899,000	[1]	25,033,000	[1]	25,726,000	[1]
financing receivables, modifications, number of contracts at period end	41		41		41		41		40
Total commercial	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	59,830,000	[1]	70,528,000	[1]	59,830,000	[1]	70,528,000	[1]	68,265,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	98,862,000	[1]	115,049,000	[1]	98,862,000	[1]	115,049,000	[1]	115,029,000	[1]
financing receivables, modifications, number of contracts at period end	176		154		176		154		157
Installment	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	24,535,000	[1]	28,578,000	[1]	24,535,000	[1]	28,578,000	[1]	27,790,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	25,336,000	[1]	29,960,000	[1]	25,336,000	[1]	29,960,000	[1]	29,078,000	[1]
financing receivables, modifications, number of contracts at period end	1,275		1,655		1,275		1,655		1,565
Home Equity Line of Credit	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	22,077,000	[1]	12,929,000	[1]	22,077,000	[1]	12,929,000	[1]	12,371,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	22,373,000	[1]	13,339,000	[1]	22,373,000	[1]	13,339,000	[1]	12,745,000	[1]
financing receivables, modifications, number of contracts at period end	458		291		458		291		286
Consumer Credit Card	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	912,000	[1]	1,253,000		912,000	[1]	1,253,000		1,113,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	912,000	[1]	1,253,000		912,000	[1]	1,253,000		1,113,000	[1]
financing receivables, modifications, number of contracts at period end	244		339		244		339		307
Residential Mortgages	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	28,054,000	[1]	23,217,000	[1]	28,054,000	[1]	23,217,000	[1]	23,648,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	31,365,000	[1]	25,834,000	[1]	31,365,000	[1]	25,834,000	[1]	26,328,000	[1]
financing receivables, modifications, number of contracts at period end	351		293		351		293		309
Total consumer	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	75,578,000	[1]	65,977,000	[1]	75,578,000	[1]	65,977,000	[1]	64,922,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	79,986,000	[1]	70,386,000	[1]	79,986,000	[1]	70,386,000	[1]	69,264,000	[1]
financing receivables, modifications, number of contracts at period end	2,328		2,578		2,328		2,578		2,467
Originated Loans Commercial | Commercial	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	2,673,000	[1]	5,455,000	[1]	2,673,000	[1]	5,455,000	[1]	4,449,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	10,032,000	[1]	9,533,000	[1]	10,032,000	[1]	9,533,000	[1]	7,660,000	[1]
financing receivables, modifications, number of contracts at period end	39		35		39		35		35
Originated Loans Commercial | Commercial Real Estate	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	18,087,000	[1]	15,508,000	[1]	18,087,000	[1]	15,508,000	[1]	15,932,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	22,905,000	[1]	19,848,000	[1]	22,905,000	[1]	19,848,000	[1]	20,569,000	[1]
financing receivables, modifications, number of contracts at period end	63		49		63		49		52
Originated Loans Commercial | Commercial Real Estate Construction Financing Receivable	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	0	[1]	958,000	[1]	0	[1]	958,000	[1]	905,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	0	[1]	1,237,000	[1]	0	[1]	1,237,000	[1]	1,179,000	[1]
financing receivables, modifications, number of contracts at period end	31		31		31		31		30
Originated Loans Commercial | Total commercial	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	20,760,000	[1]	21,921,000	[1]	20,760,000	[1]	21,921,000	[1]	21,286,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	32,937,000	[1]	30,618,000	[1]	32,937,000	[1]	30,618,000	[1]	29,408,000	[1]
financing receivables, modifications, number of contracts at period end	133		115		133		115		117
Originated Consumer Loans | Installment	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	23,575,000	[1]	28,578,000	[1]	23,575,000	[1]	28,578,000	[1]	27,285,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	24,315,000	[1]	29,960,000	[1]	24,315,000	[1]	29,960,000	[1]	28,536,000	[1]
financing receivables, modifications, number of contracts at period end	1,238		1,655		1,238		1,655		1,553
Originated Consumer Loans | Home Equity Line of Credit	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	7,624,000	[1]	6,916,000	[1]	7,624,000	[1]	6,916,000	[1]	6,725,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	7,874,000	[1]	7,255,000	[1]	7,874,000	[1]	7,255,000	[1]	7,054,000	[1]
financing receivables, modifications, number of contracts at period end	275		240		275		240		231
Originated Consumer Loans | Consumer Credit Card	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	912,000	[1]	1,253,000	[1]	912,000	[1]	1,253,000	[1]	1,113,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	912,000	[1]	1,253,000	[1]	912,000	[1]	1,253,000	[1]	1,113,000	[1]
financing receivables, modifications, number of contracts at period end	244		339		244		339		307
Originated Consumer Loans | Residential Mortgages	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	26,108,000	[1]	23,065,000	[1]	26,108,000	[1]	23,065,000	[1]	23,067,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	29,193,000	[1]	25,683,000	[1]	29,193,000	[1]	25,683,000	[1]	25,676,000	[1]
financing receivables, modifications, number of contracts at period end	325		292		325		292		301
Originated Consumer Loans | Total consumer	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	58,219,000	[1]	59,812,000	[1]	58,219,000	[1]	59,812,000	[1]	58,190,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	62,294,000	[1]	64,151,000	[1]	62,294,000	[1]	64,151,000	[1]	62,379,000	[1]
financing receivables, modifications, number of contracts at period end	2,082		2,526		2,082		2,526		2,392
Originated Loans	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	78,979,000	[1]	81,733,000	[1]	78,979,000	[1]	81,733,000	[1]	79,476,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	95,231,000	[1]	94,769,000	[1]	95,231,000	[1]	94,769,000	[1]	91,787,000	[1]
financing receivables, modifications, number of contracts at period end	2,215		2,641		2,215		2,641		2,509
Acquired Loans	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	10,904,000	[1]	266,000	[1]	10,904,000	[1]	266,000	[1]	2,917,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	11,237,000	[1]	313,000	[1]	11,237,000	[1]	313,000	[1]	3,049,000	[1]
financing receivables, modifications, number of contracts at period end	185		4		185		4		29
Acquired Loans | Commercial	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	3,000		6,000		3,000		6,000		6,000
Financing Receiables, Modifications, Unpaid Principal Balance	3,000		6,000		3,000		6,000		5,000
financing receivables, modifications, number of contracts at period end	1		1		1		1		1
Acquired Loans | Commercial Real Estate	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	2,336,000	[1]	'		2,336,000	[1]	'		1,730,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	2,336,000	[1]	'		2,336,000	[1]	'		1,730,000	[1]
financing receivables, modifications, number of contracts at period end	2		'		2		'		1
Acquired Loans | Commercial [Member]	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	'		6,000	[1]	'		6,000	[1]	1,736,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	'		6,000	[1]	'		6,000	[1]	1,735,000	[1]
financing receivables, modifications, number of contracts at period end	'		1		'		1		2
Acquired Loans | Total commercial	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	2,339,000		6,000		2,339,000		6,000		1,736,000
Financing Receiables, Modifications, Unpaid Principal Balance	2,339,000		'		2,339,000		'		'
financing receivables, modifications, number of contracts at period end	3		'		3		'		'
Acquired Loans | installment	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	960,000		'		960,000		'		505,000
Financing Receiables, Modifications, Unpaid Principal Balance	1,021,000		'		1,021,000		'		542,000
financing receivables, modifications, number of contracts at period end	37		'		37		'		12
Acquired Loans | Home Equity Line of Credit	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	5,995,000	[1]	260,000	[1]	5,995,000	[1]	260,000	[1]	245,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	6,041,000	[1]	307,000	[1]	6,041,000	[1]	307,000	[1]	270,000	[1]
financing receivables, modifications, number of contracts at period end	121		3		121		3		8
Acquired Loans | Mortgages	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	1,610,000		'		1,610,000		'		'
Financing Receiables, Modifications, Unpaid Principal Balance	1,836,000		'		1,836,000		'		'
financing receivables, modifications, number of contracts at period end	24		'		24		'		'
Acquired Loans | Residential Mortgages	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	'		'		'		'		431,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	'		'		'		'		502,000	[1]
financing receivables, modifications, number of contracts at period end	'		'		'		'		7
Acquired Loans | Total consumer	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	8,565,000	[1]	260,000		8,565,000	[1]	260,000		1,181,000
Financing Receiables, Modifications, Unpaid Principal Balance	8,898,000	[1]	307,000		8,898,000	[1]	307,000		1,314,000
financing receivables, modifications, number of contracts at period end	182		3		182		3		27
Covered Loans Commercial | Commercial	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	177,000	[1]	1,537,000	[1]	177,000	[1]	1,537,000	[1]	1,104,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	1,620,000	[1]	2,377,000	[1]	1,620,000	[1]	2,377,000	[1]	2,331,000	[1]
financing receivables, modifications, number of contracts at period end	6		4		6		4		4
Covered Loans Commercial | Commercial Real Estate	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	35,904,000	[1]	43,024,000	[1]	35,904,000	[1]	43,024,000	[1]	39,995,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	51,067,000	[1]	58,252,000	[1]	51,067,000	[1]	58,252,000	[1]	57,008,000	[1]
financing receivables, modifications, number of contracts at period end	24		24		24		24		24
Covered Loans Commercial | Commercial Real Estate Construction Financing Receivable	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	650,000	[1]	4,040,000	[1]	650,000	[1]	4,040,000	[1]	4,144,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	10,899,000	[1]	23,796,000	[1]	10,899,000	[1]	23,796,000	[1]	24,547,000	[1]
financing receivables, modifications, number of contracts at period end	10		10		10		10		10
Covered Loans Commercial | Total commercial	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	36,731,000	[1]	48,601,000	[1]	36,731,000	[1]	48,601,000	[1]	45,243,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	63,586,000	[1]	84,425,000	[1]	63,586,000	[1]	84,425,000	[1]	83,886,000	[1]
financing receivables, modifications, number of contracts at period end	40		38		40		38		38
Covered Consumer Loans	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	8,794,000		5,905,000		8,794,000		5,905,000		5,551,000
Covered Consumer Loans | Home Equity Line of Credit	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	8,458,000	[1]	5,753,000	[1]	8,458,000	[1]	5,753,000	[1]	5,401,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	8,458,000	[1]	5,777,000	[1]	8,458,000	[1]	5,777,000	[1]	5,421,000	[1]
financing receivables, modifications, number of contracts at period end	62		48		62		48		47
Covered Consumer Loans | Residential Mortgages	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	336,000	[1]	152,000		336,000	[1]	152,000		150,000
Financing Receiables, Modifications, Unpaid Principal Balance	336,000	[1]	'		336,000	[1]	'		'
financing receivables, modifications, number of contracts at period end	2		'		2		'		'
Covered Consumer Loans | Total consumer	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	'		5,905,000		'		5,905,000		'
Financing Receiables, Modifications, Unpaid Principal Balance	'		5,928,000		'		5,928,000		'
financing receivables, modifications, number of contracts at period end	'		49		'		49		'
Covered TDR Loans	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	45,525,000	[1]	54,506,000	[1]	45,525,000	[1]	54,506,000	[1]	50,794,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	72,380,000	[1]	90,353,000	[1]	72,380,000	[1]	90,353,000	[1]	89,457,000	[1]
financing receivables, modifications, number of contracts at period end	104		87		104		87		86
Covered TDR Loans | Total commercial	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	'		48,601,000		'		48,601,000		'
Covered TDR Loans | Residential Real Estate	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	'		152,000		'		152,000		150,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	'		151,000		'		151,000		150,000	[1]
financing receivables, modifications, number of contracts at period end	'		1		'		1		1
Covered TDR Loans | Total consumer	'		'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'		'
Financing Receivable, Modifications, Recorded Investment	8,794,000	[1]	'		8,794,000	[1]	'		5,551,000	[1]
Financing Receiables, Modifications, Unpaid Principal Balance	$8,794,000	[1]	'		$8,794,000	[1]	'		$5,571,000	[1]
financing receivables, modifications, number of contracts at period end	64		'		64		'		48
[1]	Note 1: The differences between the recorded investment and unpaid principal balance amounts represents partial charge offs.

Allowance_for_Loan_Losses_Accr

Allowance for Loan Losses Accruing and Non-Accruing Troubled Debt Restructurings (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013
In Thousands, unless otherwise specified
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	$135,408		$133,187		$136,505
Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	78,979	[1]	79,476	[1]	81,733	[1]
Impaired Financing Receivable, Related Allowance	6,052		'		'
Financing Receivable, Recorded Investment, Current	12,007,664		10,113,988		9,712,992
Financing Receivable, Recorded Investment, Past Due	64,095		99,399		76,147
Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	10,904	[1]	2,917	[1]	266	[1]
Financing Receivable, Recorded Investment, Current	2,676,903		3,404,111		3,725,753
Financing Receivable, Recorded Investment, Past Due	68,201		91,504		91,668
Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	8,794		5,551		5,905
Covered TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	45,525	[1]	50,794	[1]	54,506	[1]
Accruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	116,101		114,247		117,728
Financing Receivable, Recorded Investment, Current	80,767		69,077		70,718
Financing Receivable, Recorded Investment, Past Due	35,334		45,170		47,010
Accruing TDRs | Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	61,691		60,791		63,026
Financing Receivable, Recorded Investment, Current	57,497		54,705		57,915
Financing Receivable, Recorded Investment, Past Due	4,194		6,086		5,111
Accruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	9,221		2,662		196
Financing Receivable, Recorded Investment, Current	9,057		2,526		196
Financing Receivable, Recorded Investment, Past Due	164		136		0
Accruing TDRs | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	8,458		5,551		5,905
Financing Receivable, Recorded Investment, Current	7,834		5,527		5,408
Financing Receivable, Recorded Investment, Past Due	624		24		497
Accruing TDRs | Covered TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	45,189		50,794		54,506
Financing Receivable, Recorded Investment, Current	14,213		11,846		12,607
Financing Receivable, Recorded Investment, Past Due	30,976		38,948		41,899
Nonaccruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	19,307		18,940		18,777
Financing Receivable, Recorded Investment, Current	11,505		9,535		10,543
Financing Receivable, Recorded Investment, Past Due	7,802		9,405		8,234
Nonaccruing TDRs | Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	17,288		18,685		18,707
Financing Receivable, Recorded Investment, Current	9,553		9,434		10,543
Financing Receivable, Recorded Investment, Past Due	7,735		9,251		8,164
Nonaccruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	1,683		255		70
Financing Receivable, Recorded Investment, Current	1,616		101		0
Financing Receivable, Recorded Investment, Past Due	67		154		70
Nonaccruing TDRs | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	336		0		0
Financing Receivable, Recorded Investment, Current	336		0		0
Financing Receivable, Recorded Investment, Past Due	0		0		0
Nonaccruing TDRs | Covered TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	336		0		0
Financing Receivable, Recorded Investment, Current	336		0		0
Financing Receivable, Recorded Investment, Past Due	0		0		0
Total Tdr Allowance	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	7,088		7,201		7,621
Total Tdr Allowance | Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	3,756		3,379		3,342
Total Tdr Allowance | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	302		0		0
Total Tdr Allowance | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	26		0		0
Total Tdr Allowance | Covered TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	3,030		3,822		4,279
Mortgages | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	1,610		'		'
Mortgages | Accruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	824		'		'
Financing Receivable, Recorded Investment, Current	824		'		'
Financing Receivable, Recorded Investment, Past Due	0		'		'
Mortgages | Nonaccruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	786		'		'
Financing Receivable, Recorded Investment, Current	737		'		'
Financing Receivable, Recorded Investment, Past Due	49		'		'
Mortgages | Total Tdr Allowance | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	14		'		'
Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	2,853	[1]	5,559	[1]	6,998	[1]
Commercial | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	2,673	[1]	4,449	[1]	5,455	[1]
Commercial | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	3		6		6
Commercial | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	177		1,104		1,537
Commercial | Accruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	771		3,421		4,966
Financing Receivable, Recorded Investment, Current	594		1,800		4,044
Financing Receivable, Recorded Investment, Past Due	177		1,621		922
Commercial | Accruing TDRs | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	594		2,317		3,429
Financing Receivable, Recorded Investment, Current	594		1,438		3,249
Financing Receivable, Recorded Investment, Past Due	0		879		180
Commercial | Accruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	0		0		0
Financing Receivable, Recorded Investment, Current	0		0		0
Financing Receivable, Recorded Investment, Past Due	0		0		0
Commercial | Accruing TDRs | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	177		1,104		1,537
Financing Receivable, Recorded Investment, Current	0		362		795
Financing Receivable, Recorded Investment, Past Due	177		742		742
Commercial | Nonaccruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	2,082		2,138		2,032
Financing Receivable, Recorded Investment, Current	119		183		395
Financing Receivable, Recorded Investment, Past Due	1,963		1,955		1,637
Commercial | Nonaccruing TDRs | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	2,079		2,132		2,026
Financing Receivable, Recorded Investment, Current	116		177		395
Financing Receivable, Recorded Investment, Past Due	1,963		1,955		1,631
Commercial | Nonaccruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	3		6		6
Financing Receivable, Recorded Investment, Current	3		6		0
Financing Receivable, Recorded Investment, Past Due	0		0		6
Commercial | Nonaccruing TDRs | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	0		0		0
Financing Receivable, Recorded Investment, Current	0		0		0
Financing Receivable, Recorded Investment, Past Due	0		0		0
Commercial | Total Tdr Allowance	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	656		665		1,182
Commercial | Total Tdr Allowance | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	653		665		736
Commercial | Total Tdr Allowance | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	3		0		0
Commercial | Total Tdr Allowance | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	0		0		446
Commercial Real Estate	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	56,327	[1]	57,657	[1]	58,532	[1]
Commercial Real Estate | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	18,087	[1]	15,932	[1]	15,508	[1]
Commercial Real Estate | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	2,336	[1]	1,730	[1]	'
Commercial Real Estate | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	35,904		39,995		43,024
Commercial Real Estate | Accruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	51,881		52,549		53,704
Financing Receivable, Recorded Investment, Current	21,706		17,431		15,812
Financing Receivable, Recorded Investment, Past Due	30,175		35,118		37,892
Commercial Real Estate | Accruing TDRs | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	14,350		10,824		10,680
Financing Receivable, Recorded Investment, Current	14,350		10,442		10,333
Financing Receivable, Recorded Investment, Past Due	0		382		347
Commercial Real Estate | Accruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	1,627		1,730		'
Financing Receivable, Recorded Investment, Current	1,627		1,730		'
Financing Receivable, Recorded Investment, Past Due	0		0		'
Commercial Real Estate | Accruing TDRs | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	35,904		39,995		43,024
Financing Receivable, Recorded Investment, Current	5,729		5,259		5,479
Financing Receivable, Recorded Investment, Past Due	30,175		34,736		37,545
Commercial Real Estate | Nonaccruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	4,446		5,108		4,828
Financing Receivable, Recorded Investment, Current	2,271		1,208		1,976
Financing Receivable, Recorded Investment, Past Due	2,175		3,900		2,852
Commercial Real Estate | Nonaccruing TDRs | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	3,737		5,108		4,828
Financing Receivable, Recorded Investment, Current	1,562		1,208		1,976
Financing Receivable, Recorded Investment, Past Due	2,175		3,900		2,852
Commercial Real Estate | Nonaccruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	709		0		'
Financing Receivable, Recorded Investment, Current	709		0		'
Financing Receivable, Recorded Investment, Past Due	0		0		'
Commercial Real Estate | Nonaccruing TDRs | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	0		0		0
Financing Receivable, Recorded Investment, Current	0		0		0
Financing Receivable, Recorded Investment, Past Due	0		0		0
Commercial Real Estate | Total Tdr Allowance	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	3,167		3,054		3,126
Commercial Real Estate | Total Tdr Allowance | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	70		32		294
Commercial Real Estate | Total Tdr Allowance | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	148		0		'
Commercial Real Estate | Total Tdr Allowance | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	2,949		3,022		2,832
Commercial Real Estate Construction Financing Receivable	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	650	[1]	5,049	[1]	4,998	[1]
Commercial Real Estate Construction Financing Receivable | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	0	[1]	905	[1]	958	[1]
Commercial Real Estate Construction Financing Receivable | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	650		4,144		4,040
Commercial Real Estate Construction Financing Receivable | Accruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	650		4,992		4,935
Financing Receivable, Recorded Investment, Current	650		1,546		1,820
Financing Receivable, Recorded Investment, Past Due	0		3,446		3,115
Commercial Real Estate Construction Financing Receivable | Accruing TDRs | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	0		848		895
Financing Receivable, Recorded Investment, Current	0		848		895
Financing Receivable, Recorded Investment, Past Due	0		0		0
Commercial Real Estate Construction Financing Receivable | Accruing TDRs | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	650		4,144		4,040
Financing Receivable, Recorded Investment, Current	650		698		925
Financing Receivable, Recorded Investment, Past Due	0		3,446		3,115
Commercial Real Estate Construction Financing Receivable | Nonaccruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	0		57		63
Financing Receivable, Recorded Investment, Current	0		0		63
Financing Receivable, Recorded Investment, Past Due	0		57		0
Commercial Real Estate Construction Financing Receivable | Nonaccruing TDRs | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	0		57		63
Financing Receivable, Recorded Investment, Current	0		0		63
Financing Receivable, Recorded Investment, Past Due	0		57		0
Commercial Real Estate Construction Financing Receivable | Nonaccruing TDRs | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	0		0		0
Financing Receivable, Recorded Investment, Current	0		0		0
Financing Receivable, Recorded Investment, Past Due	0		0		0
Commercial Real Estate Construction Financing Receivable | Total Tdr Allowance	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	55		800		1,001
Commercial Real Estate Construction Financing Receivable | Total Tdr Allowance | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	0		0		0
Commercial Real Estate Construction Financing Receivable | Total Tdr Allowance | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	55		800		1,001
Total commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	59,830	[1]	68,265	[1]	70,528	[1]
Total commercial | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	20,760	[1]	21,286	[1]	21,921	[1]
Total commercial | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	2,339		1,736		6
Total commercial | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	36,731		45,243		'
Total commercial | Covered TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	'		'		48,601
Total commercial | Accruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	53,302		60,962		63,605
Financing Receivable, Recorded Investment, Current	22,950		20,777		21,676
Financing Receivable, Recorded Investment, Past Due	30,352		40,185		41,929
Total commercial | Accruing TDRs | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	14,944		13,989		15,004
Financing Receivable, Recorded Investment, Current	14,944		12,728		14,477
Financing Receivable, Recorded Investment, Past Due	0		1,261		527
Total commercial | Accruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	1,627		1,730		0
Financing Receivable, Recorded Investment, Current	1,627		1,730		0
Financing Receivable, Recorded Investment, Past Due	0		0		0
Total commercial | Accruing TDRs | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	36,731		45,243		'
Financing Receivable, Recorded Investment, Current	6,379		6,319		'
Financing Receivable, Recorded Investment, Past Due	30,352		38,924		'
Total commercial | Accruing TDRs | Covered TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	'		'		48,601
Financing Receivable, Recorded Investment, Current	'		'		7,199
Financing Receivable, Recorded Investment, Past Due	'		'		41,402
Total commercial | Nonaccruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	6,528		7,303		6,923
Financing Receivable, Recorded Investment, Current	2,390		1,391		2,434
Financing Receivable, Recorded Investment, Past Due	4,138		5,912		4,489
Total commercial | Nonaccruing TDRs | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	5,816		7,297		6,917
Financing Receivable, Recorded Investment, Current	1,678		1,385		2,434
Financing Receivable, Recorded Investment, Past Due	4,138		5,912		4,483
Total commercial | Nonaccruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	712		6		6
Financing Receivable, Recorded Investment, Current	712		6		0
Financing Receivable, Recorded Investment, Past Due	0		0		6
Total commercial | Nonaccruing TDRs | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	0		0		'
Financing Receivable, Recorded Investment, Current	0		0		'
Financing Receivable, Recorded Investment, Past Due	0		0		'
Total commercial | Nonaccruing TDRs | Covered TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	'		'		0
Financing Receivable, Recorded Investment, Current	'		'		0
Financing Receivable, Recorded Investment, Past Due	'		'		0
Total commercial | Total Tdr Allowance	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	3,878		4,519		5,309
Total commercial | Total Tdr Allowance | Originated Loans Commercial	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	723		697		1,030
Total commercial | Total Tdr Allowance | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	151		0		0
Total commercial | Total Tdr Allowance | Covered Commercial TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	3,004		3,822		'
Total commercial | Total Tdr Allowance | Covered TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	'		'		4,279
Consumer Installment	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	24,535		27,790		28,578
Consumer Installment | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	23,575		27,285		28,578
Consumer Installment | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	960		505		'
Consumer Installment | Accruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	22,496		25,085		25,455
Financing Receivable, Recorded Investment, Current	21,888		23,711		24,194
Financing Receivable, Recorded Investment, Past Due	608		1,374		1,261
Consumer Installment | Accruing TDRs | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	21,579		24,580		25,455
Financing Receivable, Recorded Investment, Current	21,046		23,342		24,194
Financing Receivable, Recorded Investment, Past Due	533		1,238		1,261
Consumer Installment | Accruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	917		505		'
Financing Receivable, Recorded Investment, Current	842		369		'
Financing Receivable, Recorded Investment, Past Due	75		136		'
Consumer Installment | Nonaccruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	2,039		2,705		3,123
Financing Receivable, Recorded Investment, Current	1,872		2,483		2,803
Financing Receivable, Recorded Investment, Past Due	167		222		320
Consumer Installment | Nonaccruing TDRs | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	1,996		2,705		3,123
Financing Receivable, Recorded Investment, Current	1,847		2,483		2,803
Financing Receivable, Recorded Investment, Past Due	149		222		320
Consumer Installment | Nonaccruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	43		0		'
Financing Receivable, Recorded Investment, Current	25		0		'
Financing Receivable, Recorded Investment, Past Due	18		0		'
Consumer Installment | Total Tdr Allowance	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	1,223		1,014		552
Consumer Installment | Total Tdr Allowance | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	1,086		1,014		552
Consumer Installment | Total Tdr Allowance | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	137		0		'
Consumer Home Equity Lines Financing Receivable	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	22,077		12,371		12,929
Consumer Home Equity Lines Financing Receivable | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	7,624		6,725		6,916
Consumer Home Equity Lines Financing Receivable | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	5,995		245		260
Consumer Home Equity Lines Financing Receivable | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	8,458		5,401		5,753
Consumer Home Equity Lines Financing Receivable | Accruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	20,634		11,090		11,605
Financing Receivable, Recorded Investment, Current	19,741		10,872		10,996
Financing Receivable, Recorded Investment, Past Due	893		218		609
Consumer Home Equity Lines Financing Receivable | Accruing TDRs | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	6,659		5,507		5,656
Financing Receivable, Recorded Investment, Current	6,479		5,313		5,544
Financing Receivable, Recorded Investment, Past Due	180		194		112
Consumer Home Equity Lines Financing Receivable | Accruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	5,853		182		196
Financing Receivable, Recorded Investment, Current	5,764		182		196
Financing Receivable, Recorded Investment, Past Due	89		0		0
Consumer Home Equity Lines Financing Receivable | Accruing TDRs | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	8,122		5,401		5,753
Financing Receivable, Recorded Investment, Current	7,498		5,377		5,256
Financing Receivable, Recorded Investment, Past Due	624		24		497
Consumer Home Equity Lines Financing Receivable | Nonaccruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	1,443		1,281		1,324
Financing Receivable, Recorded Investment, Current	1,393		1,269		1,260
Financing Receivable, Recorded Investment, Past Due	50		12		64
Consumer Home Equity Lines Financing Receivable | Nonaccruing TDRs | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	965		1,218		1,260
Financing Receivable, Recorded Investment, Current	915		1,206		1,260
Financing Receivable, Recorded Investment, Past Due	50		12		0
Consumer Home Equity Lines Financing Receivable | Nonaccruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	142		63		64
Financing Receivable, Recorded Investment, Current	142		63		0
Financing Receivable, Recorded Investment, Past Due	0		0		64
Consumer Home Equity Lines Financing Receivable | Nonaccruing TDRs | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	336		0		0
Financing Receivable, Recorded Investment, Current	336		0		0
Financing Receivable, Recorded Investment, Past Due	0		0		0
Consumer Home Equity Lines Financing Receivable | Total Tdr Allowance	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	190		223		197
Consumer Home Equity Lines Financing Receivable | Total Tdr Allowance | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	190		223		197
Consumer Home Equity Lines Financing Receivable | Total Tdr Allowance | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	0		0		0
Consumer Home Equity Lines Financing Receivable | Total Tdr Allowance | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	0		0		0
Residential Mortgages	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	28,054	[1]	23,648	[1]	23,217	[1]
Residential Mortgages | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	26,108	[1]	23,067	[1]	23,065	[1]
Residential Mortgages | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	'		431	[1]	'
Residential Mortgages | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	336	[1]	150		152
Residential Mortgages | Accruing TDRs | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	336		150		152
Financing Receivable, Recorded Investment, Current	336		150		152
Financing Receivable, Recorded Investment, Past Due	0		0		0
Residential Mortgages | Nonaccruing TDRs | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	0		0		0
Financing Receivable, Recorded Investment, Current	0		0		0
Financing Receivable, Recorded Investment, Past Due	0		0		0
Residential Mortgages | Total Tdr Allowance | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	26		0		0
Consumer Credit Card	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	912	[1]	1,113	[1]	1,253
Consumer Credit Card | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	912	[1]	1,113	[1]	1,253	[1]
Consumer Credit Card | Accruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	897		1,112		1,251
Financing Receivable, Recorded Investment, Current	800		1,046		1,134
Financing Receivable, Recorded Investment, Past Due	97		66		117
Consumer Credit Card | Accruing TDRs | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	897		1,112		1,251
Financing Receivable, Recorded Investment, Current	800		1,046		1,134
Financing Receivable, Recorded Investment, Past Due	97		66		117
Consumer Credit Card | Nonaccruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	15		1		2
Financing Receivable, Recorded Investment, Current	0		0		0
Financing Receivable, Recorded Investment, Past Due	15		1		2
Consumer Credit Card | Nonaccruing TDRs | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	15		1		2
Financing Receivable, Recorded Investment, Current	0		0		0
Financing Receivable, Recorded Investment, Past Due	15		1		2
Consumer Credit Card | Total Tdr Allowance	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	322		312		261
Consumer Credit Card | Total Tdr Allowance | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	322		312		261
Consumer Residential Mortgages Financing Receivable	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	28,054		23,648		23,217
Consumer Residential Mortgages Financing Receivable | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	26,108		23,067		23,065
Consumer Residential Mortgages Financing Receivable | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	'		431		'
Consumer Residential Mortgages Financing Receivable | Accruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	18,772		15,998		15,812
Financing Receivable, Recorded Investment, Current	15,388		12,671		12,718
Financing Receivable, Recorded Investment, Past Due	3,384		3,327		3,094
Consumer Residential Mortgages Financing Receivable | Accruing TDRs | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	17,612		15,603		15,660
Financing Receivable, Recorded Investment, Current	14,228		12,276		12,566
Financing Receivable, Recorded Investment, Past Due	3,384		3,327		3,094
Consumer Residential Mortgages Financing Receivable | Accruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	'		245		'
Financing Receivable, Recorded Investment, Current	'		245		'
Financing Receivable, Recorded Investment, Past Due	'		0		'
Consumer Residential Mortgages Financing Receivable | Nonaccruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	9,282		7,650		7,405
Financing Receivable, Recorded Investment, Current	5,850		4,392		4,046
Financing Receivable, Recorded Investment, Past Due	3,432		3,258		3,359
Consumer Residential Mortgages Financing Receivable | Nonaccruing TDRs | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	8,496		7,464		7,405
Financing Receivable, Recorded Investment, Current	5,113		4,360		4,046
Financing Receivable, Recorded Investment, Past Due	3,383		3,104		3,359
Consumer Residential Mortgages Financing Receivable | Nonaccruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	'		186		'
Financing Receivable, Recorded Investment, Current	'		32		'
Financing Receivable, Recorded Investment, Past Due	'		154		'
Consumer Residential Mortgages Financing Receivable | Total Tdr Allowance	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	1,475		1,133		1,302
Consumer Residential Mortgages Financing Receivable | Total Tdr Allowance | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	1,435		1,133		1,302
Consumer Residential Mortgages Financing Receivable | Total Tdr Allowance | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	'		0		'
Total consumer	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	75,578	[1]	64,922	[1]	65,977	[1]
Total consumer | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	58,219	[1]	58,190	[1]	59,812	[1]
Total consumer | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	8,565	[1]	1,181		260
Total consumer | Covered Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	'		'		5,905
Total consumer | Covered TDR Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	8,794	[1]	5,551	[1]	'
Total consumer | Accruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	62,799		53,285		54,123
Financing Receivable, Recorded Investment, Current	57,817		48,300		49,042
Financing Receivable, Recorded Investment, Past Due	4,982		4,985		5,081
Total consumer | Accruing TDRs | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	46,747		46,802		48,022
Financing Receivable, Recorded Investment, Current	42,553		41,977		43,438
Financing Receivable, Recorded Investment, Past Due	4,194		4,825		4,584
Total consumer | Accruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	7,594		932		196
Financing Receivable, Recorded Investment, Current	7,430		796		196
Financing Receivable, Recorded Investment, Past Due	164		136		0
Total consumer | Nonaccruing TDRs	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	12,779		11,637		11,854
Financing Receivable, Recorded Investment, Current	9,115		8,144		8,109
Financing Receivable, Recorded Investment, Past Due	3,664		3,493		3,745
Total consumer | Nonaccruing TDRs | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	11,472		11,388		11,790
Financing Receivable, Recorded Investment, Current	7,875		8,049		8,109
Financing Receivable, Recorded Investment, Past Due	3,597		3,339		3,681
Total consumer | Nonaccruing TDRs | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Modifications, Recorded Investment	971		249		64
Financing Receivable, Recorded Investment, Current	904		95		0
Financing Receivable, Recorded Investment, Past Due	67		154		64
Total consumer | Total Tdr Allowance	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	3,210		2,682		2,312
Total consumer | Total Tdr Allowance | Originated Consumer Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	3,033		2,682		2,312
Total consumer | Total Tdr Allowance | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	151		0		0
Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	6,052	[2]	6,146	[2]	4,136	[2]
Consumer Home Equity Lines Financing Receivable | Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Recorded Investment, Current	1,058,795		916,319		886,662
Financing Receivable, Recorded Investment, Past Due	3,218		3,747		2,710
Consumer Home Equity Lines Financing Receivable | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Recorded Investment, Current	246,329		284,111		298,500
Financing Receivable, Recorded Investment, Past Due	6,646		10,313		8,283
Consumer Home Equity Lines Financing Receivable | Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	'		223	[2]	197	[2]
Consumer Residential Mortgages Financing Receivable | Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Recorded Investment, Current	583,926		497,973		460,681
Financing Receivable, Recorded Investment, Past Due	22,072		31,280		26,602
Consumer Residential Mortgages Financing Receivable | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Recorded Investment, Current	401,369		457,245		434,319
Financing Receivable, Recorded Investment, Past Due	8,696		13,407		32,275
Consumer Residential Mortgages Financing Receivable | Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	'		1,133	[2]	1,302	[2]
Consumer Credit Card | Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Recorded Investment, Current	158,245		146,378		143,198
Financing Receivable, Recorded Investment, Past Due	1,868		1,935		1,915
Consumer Credit Card | Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	'		312	[2]	261	[2]
Installment | Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Recorded Investment, Current	2,257,587		1,703,980		1,628,500
Financing Receivable, Recorded Investment, Past Due	19,946		23,945		18,595
Installment | Acquired Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Financing Receivable, Recorded Investment, Current	799,847		982,611		1,065,103
Financing Receivable, Recorded Investment, Past Due	9,973		21,958		15,195
Installment | Originated Loans	'		'		'
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]	'		'		'
Impaired Financing Receivable, Related Allowance	'		$1,014	[2]	$552	[2]
[1]	Note 1: The differences between the recorded investment and unpaid principal balance amounts represents partial charge offs.
[2]	Note 1: These tables exclude loans fully charged off.Note 2: The differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.

Allowance_for_Loan_Losses_Sche2

Allowance for Loan Losses Schedule of Troubled Debt Restructuring Current Period (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	10	64	15
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$603	$5,640	$2,879
Commercial and Industrial	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	3	4	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	115	1,773	0
Commercial and Industrial | Originated Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	3	4	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	115	1,773	0
Commercial and Industrial | Covered Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	'	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	0	'
Commercial Real Estate	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	1	7	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	328	3,101	920
Commercial Real Estate | Originated Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	1	6	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	328	3,101	920
Commercial Real Estate | Covered Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	'	1	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	0	'
Commercial Real Estate Construction Financing Receivable	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	276	0
Commercial Real Estate Construction Financing Receivable | Originated Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	231	0
Commercial Real Estate Construction Financing Receivable | Covered Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	'	1	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	45	'
Total commercial	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	4	13	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	443	5,150	920
Total commercial | Originated Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	4	11	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	443	5,105	920
Total commercial | Covered Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	'	2	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	45	'
Consumer Installment	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	5	17	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	99	170	3
Consumer Installment | Originated Consumer Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	4	17	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	22	170	3
Consumer Installment | Covered TDR Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	'	'
Consumer Installment | Acquired Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	1	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	77	0	'
Home Equity Line of Credit	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	1	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	61	0	24
Home Equity Line of Credit | Originated Consumer Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	24
Home Equity Line of Credit | Covered TDR Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	'	'
Home Equity Line of Credit | Acquired Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	1	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	61	0	'
Consumer Credit Card	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	33	9
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	245	74
Consumer Credit Card | Originated Consumer Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	33	9
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	245	74
Residential Mortgages	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	1	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	75	1,858
Residential Mortgages | Originated Consumer Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	1	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	75	1,858
Residential Mortgages | Covered TDR Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	'	'
Residential Mortgages | Acquired Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0	'
Total consumer	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	6	51	14
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	160	490	1,959
Total consumer | Originated Consumer Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	4	51	14
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	22	490	1,959
Total consumer | Covered TDR Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	0	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	'	'
Total consumer | Acquired Loans	'	'	'
Troubled Debt Restructuring, Debtor, Current Period [Line Items]	'	'	'
financing receivable, modifications, subsequent default, number of contracts at period end	2	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$138	$0	'

Allowance_for_Loan_Losses_Deta

Allowance for Loan Losses Details Textual (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Allowance For Loan And Lease Losses [Line Items]	'	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses, Write-downs	$3,200,000	'	$12,600,000	'	'	'	'	'
Loan Commitments	6,002,231,000	5,578,342,000	6,002,231,000	5,578,342,000	'	5,546,635,000	'	'
Minimum Non Performing Substandard Loans Outstanding for Allowance for Credit Losses	300,000	'	300,000	'	'	'	'	'
Minimum Non Performing Substandard Doubtful Loans Outstanding for Allowance for Credit Losses	100,000	'	100,000	'	'	'	'	'
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	200,000	100,000	400,000	300,000	'	'	'	'
Loans and Leases Receivable, Impaired, Troubled Debt, Interest Income	700,000	600,000	2,000,000	2,400,000	'	'	'	'
Covered Loans	'	'	'	'	'	'	'	'
Allowance For Loan And Lease Losses [Line Items]	'	'	'	'	'	'	'	'
Loans and Leases Receivable, Allowance, Covered	42,988,000	45,544,000	42,988,000	45,544,000	45,109,000	44,027,000	49,069,000	43,255,000
Provision for Loan Losses Before Benefit Attributable to FDIC Loss Share Agreements	2,827,000	2,855,000	10,255,000	19,009,000	'	'	'	'
Benefit Attributable to FDIC Loss Share Agreements	-2,908,000	-1,032,000	-3,835,000	-8,890,000	'	'	'	'
Provision for Loan Lease and Other Losses Covered	-81,000	1,823,000	6,420,000	10,119,000	'	'	'	'
Total impaired loans with no related allowance	'	'	'	'	'	'	'	'
Allowance For Loan And Lease Losses [Line Items]	'	'	'	'	'	'	'	'
Loan Commitments	$500,000	'	$500,000	'	'	'	'	'

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets-Accumulated Amortization of Intangible Assets Schedule (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-Lived Intangible Assets, Gross	$96,561	$101,873	$101,873
Finite-Lived Intangible Assets, Accumulated Amortization	-22,608	-19,118	-16,426
Finite-Lived Intangible Assets, Net	73,953	82,755	85,447
Core Deposits	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-Lived Intangible Assets, Gross	82,323	87,533	87,533
Finite-Lived Intangible Assets, Accumulated Amortization	-17,712	-16,065	-14,325
Finite-Lived Intangible Assets, Net	64,611	71,468	73,208
Noncompete Agreement	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-Lived Intangible Assets, Gross	'	102	102
Finite-Lived Intangible Assets, Accumulated Amortization	'	-102	-96
Finite-Lived Intangible Assets, Net	'	0	6
Lease Agreements	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-Lived Intangible Assets, Gross	238	238	238
Finite-Lived Intangible Assets, Accumulated Amortization	-167	-140	-131
Finite-Lived Intangible Assets, Net	71	98	107
Customer Relationships	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-Lived Intangible Assets, Gross	14,000	14,000	14,000
Finite-Lived Intangible Assets, Accumulated Amortization	-4,729	-2,811	-1,874
Finite-Lived Intangible Assets, Net	$9,271	$11,189	$12,126

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Goodwill	$741,740,000	$741,740,000	$741,740,000	$741,740,000	$741,740,000
Amortization of Intangible Assets	2,933,000	2,972,000	8,802,000	5,700,000	'
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	2,900,000	'	2,900,000	'	'
Finite-Lived Intangible Assets, Amortization Expense, Year Two	10,400,000	'	10,400,000	'	'
Finite-Lived Intangible Assets, Amortization Expense, Year Three	9,200,000	'	9,200,000	'	'
Finite-Lived Intangible Assets, Amortization Expense, Year Four	8,200,000	'	8,200,000	'	'
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$7,300,000	'	$7,300,000	'	'
Core Deposits	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Finite-Lived Intangible Asset, Useful Life	'	'	'10 years	'	'
Citizens Republic Bancorp | Core Deposits	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Finite-Lived Intangible Asset, Useful Life	'	'	'15 years	'	'
Citizens Republic Bancorp | Customer Relationships	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Finite-Lived Intangible Asset, Useful Life	'	'	'12 years	'	'

Shareholders_Equity_Details

Shareholders Equity (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Schedule of Earnings Per Share, Basic and Diluted [Line Items]	'	'	'	'
Net Income (Loss) Available to Common Stockholders, Diluted	$61,910	$38,936	$171,032	$121,540
Net Income (Loss) Attributable to Parent	63,898	40,715	176,872	126,510
Preferred Stock Dividends, Income Statement Impact	1,469	1,469	4,407	3,868
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	519	310	1,433	1,102
Net income attributable to common shareholders	$61,910	$38,936	$171,032	$121,540
Weighted average number of common shares outstanding - basic	165,389	165,044	165,263	144,402
Weighted average number of common shares outstanding - diluted	165,804	165,874	165,916	147,392
Earnings Per Share, Basic	$0.37	$0.24	$1.03	$0.84
Earnings Per Share, Diluted	$0.37	$0.23	$1.03	$0.82
Employee Stock Option	'	'	'	'
Schedule of Earnings Per Share, Basic and Diluted [Line Items]	'	'	'	'
Weighted average number of common shares outstanding - diluted	415	830	653	2,990

Shareholders_Equity_Details_Na

Shareholders Equity Details Narrative (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Sep. 30, 2014	Apr. 12, 2013	Sep. 30, 2014
In Millions, except Share data, unless otherwise specified				Citizens Republic Bancorp	Citizens Republic Bancorp	Citizens Republic Bancorp
					FirstMerit
Shareholders Equity Narrative [Line Items]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$0.90	'	$1.50	'	'	'
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	'	'	'	'	2,408,203	2,538,596
Class of Warrant or Right, Exercise Price of Warrants or Rights	'	'	'	'	'	$17.73
5.875% Non-Cumulative Perpetual Preferred stock, Series A, authorized 115,000 shares	7,000,000	'	'	'	'	'
Non-cumulative Perpetual Preferred Stock, Series A, Shares Authorized	115,000	115,000	115,000	'	'	'
Interest rate of Non-Cumulative Perpetual Preferred Stock, Series A	'	'	'	5.88%	'	'
5.875% Non-Cumulative Perpetual Preferred stock, Series A, 100,000 outstanding	100,000	100,000	100,000	'	'	'

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
OPERATIONS:	'	'	'	'
Net interest income	$193,578	$203,340	$583,057	$512,717
Provision for Loan, Lease, and Other Losses	9,192	6,379	38,982	23,634
Noninterest Income	69,733	71,090	209,564	197,923
Other expenses	163,145	210,599	499,878	505,633
Net income	63,898	40,715	176,872	126,510
AVERAGES :	'	'	'	'
Assets	24,583,776	24,013,594	24,337,653	20,632,658
Total commercial	'	'	'	'
OPERATIONS:	'	'	'	'
Net interest income	105,191	117,476	317,178	300,423
Provision for Loan, Lease, and Other Losses	-7,642	-27	-7,476	6,866
Noninterest Income	21,096	21,364	69,083	60,980
Other expenses	58,221	57,033	181,435	151,587
Net income	49,211	53,136	137,995	131,704
AVERAGES :	'	'	'	'
Assets	9,407,684	8,685,333	9,225,407	8,020,824
Retail	'	'	'	'
OPERATIONS:	'	'	'	'
Net interest income	95,710	103,046	283,839	248,704
Provision for Loan, Lease, and Other Losses	7,627	905	25,149	7,071
Noninterest Income	28,270	30,723	80,651	88,916
Other expenses	85,954	96,153	269,331	235,518
Net income	19,759	23,910	45,506	61,985
AVERAGES :	'	'	'	'
Assets	5,700,960	5,659,553	5,565,047	4,646,817
Wealth	'	'	'	'
OPERATIONS:	'	'	'	'
Net interest income	5,119	4,286	14,596	12,727
Provision for Loan, Lease, and Other Losses	362	-736	713	-570
Noninterest Income	14,108	13,216	41,624	34,347
Other expenses	12,777	14,650	37,874	38,698
Net income	3,956	2,090	11,460	5,469
AVERAGES :	'	'	'	'
Assets	289,549	266,028	263,513	255,538
Nonreportable segments and reconciling items	'	'	'	'
OPERATIONS:	'	'	'	'
Net interest income	-12,442	-21,468	-32,556	-49,137
Provision for Loan, Lease, and Other Losses	8,845	6,237	20,596	10,267
Noninterest Income	6,259	5,787	18,206	13,680
Other expenses	6,193	42,763	11,238	79,830
Net income	-9,028	-38,421	-18,089	-72,648
AVERAGES :	'	'	'	'
Assets	$9,185,583	$9,402,680	$9,283,686	$7,709,479

Derivative_Instruments_Designa

Derivative Instruments Designated at Hedging Instruments (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013		Sep. 30, 2013
In Thousands, unless otherwise specified
Derivatives designated in hedge relationships	'	'		'
Derivative Asset, Fair Value	$43,097	$47,902		$53,839
Derivative Liability, Fair Value	49,280	58,201		65,506
Interest rate swaps | Designated as Hedging Instrument	'	'		'
Derivatives designated in hedge relationships	'	'		'
Derivative Asset, Notional/Contract Amount	0	0		0
Derivative Asset, Fair Value	0	0	[1]	0	[1]
Derivative Liability, Notional/Contract Amount	100,490	126,637		133,159
Derivative Liability, Fair Value	$7,584	$11,574		$13,289
[1]	(a) Included in "Other assets" on the Consolidated Balance Sheets(b) Included in "Other liabilities" on the Consolidated Balance Sheets

Derivative_Instruments_not_Des

Derivative Instruments not Designated as Hedging Instruments (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013
In Thousands, unless otherwise specified
Derivatives not designated in hedge relationships	'		'		'
Derivative Asset, Fair Value	$43,097		$47,902		$53,839
Derivative Liability, Fair Value	49,280		58,201		65,506
Not Designated as Hedging Instrument	'		'		'
Derivatives not designated in hedge relationships	'		'		'
Derivative Asset, Notional/Contract Amount	1,858,254		1,760,450		1,696,516
Derivative Asset, Fair Value	43,097	[1]	47,902	[1]	53,839	[1]
Derivative Liability, Notional/Contract Amount	1,856,275		1,743,151		1,726,203
Derivative Liability, Fair Value	41,696		46,627		52,217
Not Designated as Hedging Instrument | Interest rate swaps	'		'		'
Derivatives not designated in hedge relationships	'		'		'
Derivative Asset, Notional/Contract Amount	1,655,371		1,622,525		1,546,228
Derivative Asset, Fair Value	40,937		46,577	[1]	51,044	[1]
Derivative Liability, Notional/Contract Amount	1,655,371		1,622,531		1,546,228
Derivative Liability, Fair Value	40,937		46,577		51,044
Not Designated as Hedging Instrument | Mortgage loan commitments	'		'		'
Derivatives not designated in hedge relationships	'		'		'
Derivative Asset, Notional/Contract Amount	167,634		90,541		144,572
Derivative Asset, Fair Value	1,975		891	[1]	2,729	[1]
Derivative Liability, Notional/Contract Amount	0		0		0
Derivative Liability, Fair Value	0		0		0
Not Designated as Hedging Instrument | Forward sales contracts	'		'		'
Derivatives not designated in hedge relationships	'		'		'
Derivative Asset, Notional/Contract Amount	0		40,906		0
Derivative Asset, Fair Value	0		384	[1]	0	[1]
Derivative Liability, Notional/Contract Amount	67,528		0		68,581
Derivative Liability, Fair Value	91		0		1,081
Not Designated as Hedging Instrument | Credit Risk Contract	'		'		'
Derivatives not designated in hedge relationships	'		'		'
Derivative Asset, Notional/Contract Amount	20,504		0		0
Derivative Asset, Fair Value	0	[1]	0	[1]	0	[1]
Derivative Liability, Notional/Contract Amount	58,157		49,914		50,336
Derivative Liability, Fair Value	0		0		0
Not Designated as Hedging Instrument | Foreign Exchange	'		'		'
Derivatives not designated in hedge relationships	'		'		'
Derivative Asset, Notional/Contract Amount	14,745		6,478		5,716
Derivative Asset, Fair Value	185		50	[1]	66	[1]
Derivative Liability, Notional/Contract Amount	14,074		6,893		6,295
Derivative Liability, Fair Value	153		50		92
Not Designated as Hedging Instrument | Other Contract	'		'		'
Derivatives not designated in hedge relationships	'		'		'
Derivative Asset, Notional/Contract Amount	0		0		0
Derivative Asset, Fair Value	0		0	[1]	0	[1]
Derivative Liability, Notional/Contract Amount	61,145		63,813		54,763
Derivative Liability, Fair Value	$515		$0		$0
[1]	(a) Included in "Other assets" on the Consolidated Balance Sheets(b) Included in "Other liabilities" on the Consolidated Balance Sheets

Derivative_Instruments_GainLos

Derivative Instruments, Gain(Loss) (Details) (Not Designated as Hedging Instrument, USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gains and losses recognized in income on derivatives	$773	($3,393)	$2,135	($2,809)
Mortgage loan commitments | Other income	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gains and losses recognized in income on derivatives	-516	1,950	1,084	-1,672
Forward sales contracts | Other income	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gains and losses recognized in income on derivatives	454	-5,538	-476	-1,019
Credit Risk Contract | Other income	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gains and losses recognized in income on derivatives	320	195	1,012	-118
Other Credit Derivatives [Member] | Other Expenses [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gains and losses recognized in income on derivatives	$515	$0	$515	$0

Derivatives_and_Hedging_Activi

Derivatives and Hedging Activities Offsetting Disclosure for Derivative Contracts (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Offsetting Disclosure for Derivative Contracts [Line Items]	'	'	'
offsetting disclosure, derivative asset, fair value, gross	$1,678	$4,795	$2,651
offsetting disclosure, offset amount, derivative asset, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative asset, falir value	1,678	4,795	2,651
offseting disclosure, netting adjustment, derivative asset, fair value	-1,498	-4,795	-2,677
offsetting disclosure, collateral value, derivative asset	-180	0	26
offsetting disclosure, net amount total, derivative asset, fair value	0	0	0
offsetting disclosure, derivative liability, fair value, gross	47,023	53,407	61,839
offsetting disclosure, offset amount, derivative liability, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative liability, falir value	47,023	53,407	61,839
offseting disclosure, netting adjustment, derivative liability, fair value	-1,498	-4,795	-2,677
offsetting disclosure, collateral value, derivative liability	-45,525	-48,612	-59,162
offsetting disclosure, net amount total, derivative liability, fair value	0	0	0
Designated as Hedging Instrument | Interest Rate Swap	'	'	'
Offsetting Disclosure for Derivative Contracts [Line Items]	'	'	'
offsetting disclosure, derivative liability, fair value, gross	7,584	11,574	13,289
offsetting disclosure, offset amount, derivative liability, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative liability, falir value	7,584	11,574	13,289
offseting disclosure, netting adjustment, derivative liability, fair value	0	0	0
offsetting disclosure, collateral value, derivative liability	-7,584	-11,574	-13,289
offsetting disclosure, net amount total, derivative liability, fair value	0	0	0
Not Designated as Hedging Instrument | Interest Rate Swap	'	'	'
Offsetting Disclosure for Derivative Contracts [Line Items]	'	'	'
offsetting disclosure, derivative asset, fair value, gross	1,498	4,791	2,585
offsetting disclosure, offset amount, derivative asset, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative asset, falir value	1,498	4,791	2,585
offseting disclosure, netting adjustment, derivative asset, fair value	-1,498	-4,791	-2,585
offsetting disclosure, collateral value, derivative asset	0	0	0
offsetting disclosure, net amount total, derivative asset, fair value	0	0	0
offsetting disclosure, derivative liability, fair value, gross	39,439	41,787	48,458
offsetting disclosure, offset amount, derivative liability, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative liability, falir value	39,439	41,787	48,458
offseting disclosure, netting adjustment, derivative liability, fair value	-1,498	-4,791	-2,585
offsetting disclosure, collateral value, derivative liability	-37,941	-36,996	-45,873
offsetting disclosure, net amount total, derivative liability, fair value	0	0	0
Not Designated as Hedging Instrument | Foreign Exchange Contract	'	'	'
Offsetting Disclosure for Derivative Contracts [Line Items]	'	'	'
offsetting disclosure, derivative asset, fair value, gross	180	4	66
offsetting disclosure, offset amount, derivative asset, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative asset, falir value	180	4	66
offseting disclosure, netting adjustment, derivative asset, fair value	0	-4	-92
offsetting disclosure, collateral value, derivative asset	-180	0	26
offsetting disclosure, net amount total, derivative asset, fair value	0	0	0
offsetting disclosure, derivative liability, fair value, gross	0	46	92
offsetting disclosure, offset amount, derivative liability, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative liability, falir value	0	46	92
offseting disclosure, netting adjustment, derivative liability, fair value	0	-4	-92
offsetting disclosure, collateral value, derivative liability	0	-42	0
offsetting disclosure, net amount total, derivative liability, fair value	$0	$0	$0

Derivatives_and_Hedging_Activi1

Derivatives and Hedging Activities (Details Textual) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
		Government Agency Issued Bonds or MBS	Government Agency Issued Bonds or MBS	Government Agency Issued Bonds or MBS
Derivative [Line Items]	'	'	'	'
Term of written loan commitments, days	'60	'	'	'
Remaining Term on Swap Participation Agreements, minimum	'3 years	'	'	'
Default Assumptions Percentage	100.00%	'	'	'
Collateral posted against derivative liabilities	'	$55	$70.50	$78.20
Credit Derivative, Maximum Exposure, Undiscounted	$4.20	'	'	'

Benefit_Plans_Schedule_of_Net_

Benefit Plans Schedule of Net Benefit Costs Details (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Plan, Defined Benefit [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Defined Benefit Plan, Service Cost	$182	$585	$546	$1,755
Defined Benefit Plan, Interest Cost	3,584	2,632	10,753	7,896
Defined Benefit Plan, Expected Return on Plan Assets	-4,009	-2,960	-12,026	-8,880
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	633	117	1,965	351
Defined Benefit Plan, Amortization of Gains (Losses)	708	1,174	2,221	3,522
Defined Benefit Plan, Net Periodic Benefit Cost	1,098	1,548	3,459	4,644
Other Postretirement Benefit Plans, Defined Benefit	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Defined Benefit Plan, Service Cost	16	24	49	74
Defined Benefit Plan, Interest Cost	164	130	491	390
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	-117	-117	-351	-351
Defined Benefit Plan, Amortization of Gains (Losses)	59	67	177	201
Defined Benefit Plan, Net Periodic Benefit Cost	$122	$104	$366	$314

Fair_Value_Measurement_Recurri

Fair Value Measurement (Recurring and Nonrecurring Table) (Details) (USD $)	3 Months Ended				12 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Collateral Dependant Impaired and Non Accrual Loans Carrying Amount	$55,400,000		$48,100,000		$47,900,000
Recurring Fair Value Measurements	'		'		'
Available-for-sale	3,462,990,000		3,256,259,000		3,273,174,000
Residential loans held for sale	19,512,000		17,813,000		11,622,000
Derivative Asset, Fair Value, Gross Asset	43,097,000		53,839,000		47,902,000
Total Assets, Fair Value Disclosure, Recurring	3,525,599,000		3,327,911,000		3,332,698,000
Derivative Liability, Fair Value, Gross Liability	49,280,000		65,506,000		58,201,000
True Up Liability	12,804,000		11,457,000		11,463,000
Total liabilities at fair value on a recurring basis	62,084,000	[1]	76,963,000		69,664,000	[1]
Nonrecurring Fair Value Measurements [Abstract]	'		'		'
Fair Value of Mortgage Servicing Rights	22,229,000	[2]	22,616,000		23,041,000	[2]
Impaired and Non Accrual Loans Fair Value Disclosure	55,406,000	[3]	48,129,000		47,870,000	[3]
Other Real Estate, Non Covered	14,896,000	[4]	13,413,000		10,018,000	[4]
Other Real Estate Covered by Loss Share	5,798,000	[5]	8,475,000		8,754,000	[5]
Nonrecurring Fair Value	98,329,000		92,633,000		89,683,000
Impairment of Noncovered Other Real Estate Owned	700,000		300,000		1,400,000
Impairment of Covered Other Real Esate Owned	100,000		200,000		1,000,000
Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	2,916,000		3,096,000		3,036,000
Residential loans held for sale	0		0		0
Derivative Asset, Fair Value, Gross Asset	0		0		0
Total Assets, Fair Value Disclosure, Recurring	2,916,000		3,096,000		3,036,000
Derivative Liability, Fair Value, Gross Liability	0		0		0
True Up Liability	0		0		0
Total liabilities at fair value on a recurring basis	0	[1]	0		0	[1]
Nonrecurring Fair Value Measurements [Abstract]	'		'		'
Fair Value of Mortgage Servicing Rights	0	[2]	0		0	[2]
Impaired and Non Accrual Loans Fair Value Disclosure	0	[3]	0		0	[3]
Other Real Estate, Non Covered	0	[4]	0		0	[4]
Other Real Estate Covered by Loss Share	0	[5]	0		0	[5]
Nonrecurring Fair Value	0		0		0
Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	3,112,553,000		2,930,401,000		2,922,527,000
Residential loans held for sale	19,512,000		17,813,000		11,622,000
Derivative Asset, Fair Value, Gross Asset	43,097,000		53,839,000		47,902,000
Total Assets, Fair Value Disclosure, Recurring	3,175,162,000		3,002,053,000		2,982,051,000
Derivative Liability, Fair Value, Gross Liability	48,765,000		65,506,000		58,201,000
True Up Liability	0		0		0
Total liabilities at fair value on a recurring basis	48,765,000	[1]	65,506,000		58,201,000	[1]
Nonrecurring Fair Value Measurements [Abstract]	'		'		'
Fair Value of Mortgage Servicing Rights	0	[2]	0		0	[2]
Impaired and Non Accrual Loans Fair Value Disclosure	0	[3]	0		0	[3]
Other Real Estate, Non Covered	0	[4]	0		0	[4]
Other Real Estate Covered by Loss Share	0	[5]	0		0	[5]
Nonrecurring Fair Value	0		0		0
Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	347,521,000		322,762,000		347,611,000
Residential loans held for sale	0		0		0
Derivative Asset, Fair Value, Gross Asset	0		0		0
Total Assets, Fair Value Disclosure, Recurring	347,521,000		322,762,000		347,611,000
Derivative Liability, Fair Value, Gross Liability	515,000		0		0
True Up Liability	12,804,000		11,457,000		11,463,000
Total liabilities at fair value on a recurring basis	13,319,000	[1]	11,457,000		11,463,000	[1]
Nonrecurring Fair Value Measurements [Abstract]	'		'		'
Fair Value of Mortgage Servicing Rights	22,229,000		22,616,000		23,041,000
Impaired and Non Accrual Loans Fair Value Disclosure	55,406,000		48,129,000		47,870,000
Other Real Estate, Non Covered	14,896,000		13,413,000		10,018,000	[4]
Other Real Estate Covered by Loss Share	5,798,000		8,475,000		8,754,000	[5]
Nonrecurring Fair Value	98,329,000		92,633,000		89,683,000
Equity Securities	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	2,916,000		3,096,000		3,036,000
Equity Securities | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	'		3,096,000		3,036,000
Equity Securities | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Equity Securities | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Non-marketable Equity Securities [Member]	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	2,500,000		3,281,000		3,281,000
Non-marketable Equity Securities [Member] | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		'		0
Non-marketable Equity Securities [Member] | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		10,000		10,000
Non-marketable Equity Securities [Member] | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	'		3,271,000		3,271,000
U.S. States and political subdivisions debt securities	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	237,067,000		272,224,000		262,367,000
U.S. States and political subdivisions debt securities | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
U.S. States and political subdivisions debt securities | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	'		272,224,000		262,367,000
U.S. States and political subdivisions debt securities | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	996,387,000		999,375,000		969,922,000
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	'		999,375,000		969,922,000
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	84,764,000		55,932,000		69,567,000
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	'		55,932,000		69,567,000
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	1,600,317,000		1,505,706,000		1,518,393,000
Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	'		1,505,706,000		1,518,393,000
Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	7,000		9,000		9,000
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	1,000		0		0
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	6,000		9,000		9,000
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	194,017,000		97,154,000		102,268,000
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	'		97,154,000		102,268,000
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Corporate debt securities	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	54,594,000		50,850,000		50,644,000
Corporate debt securities | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Corporate debt securities | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Corporate debt securities | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	'		50,850,000		50,644,000
Collateralized Loan Obligations	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	290,421,000		268,632,000		293,687,000
Collateralized Loan Obligations | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Collateralized Loan Obligations | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	0		0		0
Collateralized Loan Obligations | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Available-for-sale	'		268,632,000		293,687,000
Not Designated as Hedging Instrument	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	43,097,000	[6]	53,839,000	[6]	47,902,000	[6]
Derivative Liability, Fair Value, Gross Liability	41,696,000		52,217,000		46,627,000
Credit Risk Contract | Not Designated as Hedging Instrument	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	0	[6]	0	[6]	0	[6]
Derivative Liability, Fair Value, Gross Liability	0		0		0
Interest Rate Swap | Designated as Hedging Instrument	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	0		0	[6]	0	[6]
Derivative Liability, Fair Value, Gross Liability	7,584,000		13,289,000		11,574,000
Interest Rate Swap | Designated as Hedging Instrument | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Liability, Fair Value, Gross Liability	0		0		0
Interest Rate Swap | Designated as Hedging Instrument | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Liability, Fair Value, Gross Liability	'		13,289,000		11,574,000
Interest Rate Swap | Designated as Hedging Instrument | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Liability, Fair Value, Gross Liability	0		0		0
Interest Rate Swap | Not Designated as Hedging Instrument	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	40,937,000		51,044,000	[6]	46,577,000	[6]
Derivative Liability, Fair Value, Gross Liability	40,937,000		51,044,000		46,577,000
Interest Rate Swap | Not Designated as Hedging Instrument | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	0		0		0
Derivative Liability, Fair Value, Gross Liability	0		0		0
Interest Rate Swap | Not Designated as Hedging Instrument | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	'		51,044,000		46,577,000
Derivative Liability, Fair Value, Gross Liability	'		51,044,000		46,577,000
Interest Rate Swap | Not Designated as Hedging Instrument | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	0		0		0
Derivative Liability, Fair Value, Gross Liability	0		0		0
Mortgage Loan Commitments | Not Designated as Hedging Instrument	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	1,975,000		2,729,000	[6]	891,000	[6]
Derivative Liability, Fair Value, Gross Liability	0		0		0
Mortgage Loan Commitments | Not Designated as Hedging Instrument | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	0		0		0
Mortgage Loan Commitments | Not Designated as Hedging Instrument | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	'		2,729,000		891,000
Mortgage Loan Commitments | Not Designated as Hedging Instrument | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	0		0		0
Forward sales contracts | Not Designated as Hedging Instrument	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	0		0	[6]	384,000	[6]
Derivative Liability, Fair Value, Gross Liability	91,000		1,081,000		0
Forward sales contracts | Not Designated as Hedging Instrument | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	'		'		0
Derivative Liability, Fair Value, Gross Liability	0		0		'
Forward sales contracts | Not Designated as Hedging Instrument | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	'		'		384,000
Derivative Liability, Fair Value, Gross Liability	'		1,081,000		'
Forward sales contracts | Not Designated as Hedging Instrument | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	'		'		0
Derivative Liability, Fair Value, Gross Liability	0		0		'
Foreign Exchange | Not Designated as Hedging Instrument	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	185,000		66,000	[6]	50,000	[6]
Derivative Liability, Fair Value, Gross Liability	153,000		92,000		50,000
Foreign Exchange | Not Designated as Hedging Instrument | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	0		0		0
Derivative Liability, Fair Value, Gross Liability	0		0		0
Foreign Exchange | Not Designated as Hedging Instrument | Level 2	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	'		66,000		50,000
Derivative Liability, Fair Value, Gross Liability	'		92,000		50,000
Foreign Exchange | Not Designated as Hedging Instrument | Level 3	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	0		0		0
Derivative Liability, Fair Value, Gross Liability	0		0		0
Other Contract | Not Designated as Hedging Instrument	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Asset, Fair Value, Gross Asset	0		0	[6]	0	[6]
Derivative Liability, Fair Value, Gross Liability	515,000		0		0
Other Contract | Not Designated as Hedging Instrument | Level 1	'		'		'
Recurring Fair Value Measurements	'		'		'
Derivative Liability, Fair Value, Gross Liability	$0		'		'
[1]	(a) - There were no transfers between levels 1, 2 or 3 of the fair value hierarchy during the three months ended SeptemberB 30, 2014.
[2]	(b) - MSRs with a recorded investment of $22.2 million were reduced by a specific valuation allowance totaling $0.5 million to a reported carrying value of $21.7 million resulting in recognition of $0.1 million in recoveries included in loans sales and servicing income in the three months ended SeptemberB 30, 2014.
[3]	(c) - Collateral dependent impaired loans with a recorded investment of $59.9 million were reduced by specific valuation allowance allocations totaling $4.5 million to a reported net carrying value of $55.4 million.
[4]	(d) - Amounts do not include assets held at cost at SeptemberB 30, 2014. During the three months ended SeptemberB 30, 2014, the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.7 million included in noninterest expense.
[5]	(e) - Amounts do not include assets held at cost at SeptemberB 30, 2014. During the three months ended SeptemberB 30, 2014, the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses $0.1 million included in noninterest expense.
[6]	(a) Included in "Other assets" on the Consolidated Balance Sheets(b) Included in "Other liabilities" on the Consolidated Balance Sheets

Fair_Value_Measurement_Changes

Fair Value Measurement (Changes in Level 3 Table) (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Fair Value Disclosures [Abstract]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	$0		$111,941		$0		$271,857
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	0		0		0		0
fair value measurement asssets acquired	0	[1]	0	[1]	0	[1]	3,271	[1]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Available-for-sale securities, Beginning balance	350,733		212,512		347,610		49,661
True-up liability, Beginning balance	12,581		10,937		11,463		12,259
Available-for-sale securities, Total unrealized gains/losses	0	[1]	0	[1]	0	[1]	0	[1]
True-up liability, Total unrealized gains/losses	223		520	[1]	1,341		-802	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	277	[2]	-1,704	[2]	3,298	[2]	-2,066	[2]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	[2]	0	[2]	0	[2]	0	[2]
Available-for-sale securities, Settlements	-3,489		13		-3,387		39
True-up liability, Settlements	0		0		0		0
Available-for-sale securities, Ending balance	347,521		322,762		347,521		322,762
True-up liability, Ending balance	$12,804		$11,457		$12,804		$11,457
[1]	(a) Reported in "Other expense
[2]	(b) Reported in "Other comprehensive income (loss)

Fair_Value_Measurement_Summary

Fair Value Measurement (Summary of Change in Fair Value Carrying Amount of Residential Mortgages ) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013		Sep. 30, 2013
In Thousands, unless otherwise specified
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]	'	'		'
Loans Held-for-sale, Fair Value Disclosure	$19,512	$11,622		$17,813
Aggregate Fair Value	'	'		'
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]	'	'		'
Loans Held-for-sale, Fair Value Disclosure	19,512	11,622		17,813
Contractual Balance	'	'		'
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]	'	'		'
Loans Held-for-sale, Fair Value Disclosure	18,937	11,438		17,179
Fair Value, Option, Loans Held as Assets, Aggregate Difference	$575	$184	[1]	$634
[1]	(a) These changes are included in "Loan sales and servicing income" in the Consolidated Statements of Income.

Fair_Value_Measurement_Fair_Va

Fair Value Measurement (Fair Value Disclosure by Balance Sheet Grouping ) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2012
Financial assets:	'	'	'	'	'	'	'	'
Cash and Cash Equivalents, at Carrying Value	$485,328,000	$1,247,267,000	$485,328,000	$1,247,267,000	$917,822,000	'	'	$258,014,000
Cash and due from banks, Fair Value	485,328,000	1,247,267,000	485,328,000	1,247,267,000	917,822,000	'	'	'
Available-for-sale Securities, Carrying Amount	3,462,990,000	3,256,259,000	3,462,990,000	3,256,259,000	3,273,174,000	'	'	'
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	3,002,262,000	2,749,934,000	3,002,262,000	2,749,934,000	2,935,688,000	'	'	'
Held-to-maturity Securities, Carrying Amount	'	2,749,934,000	'	2,749,934,000	2,935,688,000	'	'	'
Held-to-maturity Securities, Fair Value	2,947,172,000	2,658,433,000	2,947,172,000	2,658,433,000	2,824,240,000	'	'	'
Other Investments, Carrying Amount	148,421,000	270,369,000	148,421,000	270,369,000	180,803,000	'	'	'
Other Investments, Fair Value	148,421,000	270,369,000	148,421,000	270,369,000	180,803,000	'	'	'
Loans Receivable Held-for-sale, Carrying Amount	19,512,000	17,813,000	19,512,000	17,813,000	11,622,000	'	'	'
Loans Held-for-sale, Fair Value Disclosure	19,512,000	17,813,000	19,512,000	17,813,000	11,622,000	'	'	'
Loans and Leases Receivable, Net Amount	15,101,949,000	14,117,001,000	15,101,949,000	14,117,001,000	14,159,720,000	'	'	'
Loans and Leases Receivable, Carrying Amount	'	9,690,848,000	'	9,690,848,000	10,116,903,000	'	'	'
Net noncovered loans, Fair Value	11,995,816,000	9,623,848,000	11,995,816,000	9,623,848,000	10,017,722,000	'	'	'
Net covered loans and loss share receivable, Carrying Amount	'	608,732,000	'	608,732,000	547,943,000	'	'	'
Net covered loans and loss share receivable, Fair Value	382,175,000	608,732,000	382,175,000	608,732,000	547,943,000	'	'	'
Accrued interest receivable, Carrying Amount	65,736,000	49,820,000	65,736,000	49,820,000	52,929,000	'	'	'
Accrued interest receivable, Fair Value	65,736,000	49,820,000	65,736,000	49,820,000	52,929,000	'	'	'
Derivative Assets, Carrying Amount	43,097,000	53,839,000	43,097,000	53,839,000	47,902,000	'	'	'
Derivative Asset, Fair Value, Gross Asset	43,097,000	53,839,000	43,097,000	53,839,000	47,902,000	'	'	'
Financial liabilities:	'	'	'	'	'	'	'	'
Deposits, Carrying Amount	19,366,911,000	19,489,533,000	19,366,911,000	19,489,533,000	19,533,601,000	'	'	'
Deposits, Fair Value	19,370,624,000	19,508,531,000	19,370,624,000	19,508,531,000	19,532,368,000	'	'	'
Total Federal funds purchased and securities sold under agreements to repurchase, Carrying Amount	1,273,290,000	1,049,801,000	1,273,290,000	1,049,801,000	851,535,000	'	'	'
Federal funds purchased and securities sold under agreements to repurchase, Fair Value	1,273,290,000	1,049,801,000	1,273,290,000	1,049,801,000	851,535,000	'	'	'
Wholesale Borrowings, Carrying Amount	608,463,000	200,858,000	608,463,000	200,858,000	200,600,000	'	'	'
Other Borrowings, Fair Value	611,753,000	204,461,000	611,753,000	204,461,000	204,124,000	'	'	'
Long-term Debt	249,933,000	324,425,000	249,933,000	324,425,000	324,428,000	'	'	'
Long-term Debt, Fair Value	259,051,000	321,255,000	259,051,000	321,255,000	319,711,000	'	'	'
Accrued interest payable, Carrying Amount	5,310,000	5,884,000	5,310,000	5,884,000	9,339,000	'	'	'
Accrued interest payable, Fair Value	5,310,000	5,884,000	5,310,000	5,884,000	9,339,000	'	'	'
Derivative liabilities, Carrying Amount	49,280,000	65,506,000	49,280,000	65,506,000	58,201,000	'	'	'
Derivative Liability, Fair Value, Gross Liability	49,280,000	65,506,000	49,280,000	65,506,000	58,201,000	'	'	'
Mortgage Servicing rights Valuation Allowance	-505,000	572,000	-505,000	572,000	-282,000	-562,000	-482,000	2,564,000
Mortgage Servicing Rights Net Carrying balance	21,684,000	22,351,000	21,684,000	22,351,000	22,500,000	'	'	'
Mortgage Servicing Rights (MSR) Impairment (Recovery)	57,000	-90,000	-223,000	-1,992,000	2,300,000	'	'	'
Impaired Collateral Dependant Loans, Recorded Investment	59,900,000	51,300,000	59,900,000	51,300,000	52,600,000	'	'	'
Determination Of Specific Allowance For Loan Losses	-4,500,000	-3,100,000	-4,500,000	-3,100,000	-4,800,000	'	'	'
Fair Value, Inputs, Level 1	'	'	'	'	'	'	'	'
Financial assets:	'	'	'	'	'	'	'	'
Cash and due from banks, Fair Value	'	1,247,267,000	'	1,247,267,000	917,822,000	'	'	'
Available-for-sale Securities, Carrying Amount	2,916,000	3,096,000	2,916,000	3,096,000	3,036,000	'	'	'
Held-to-maturity Securities, Fair Value	0	0	0	0	0	'	'	'
Other Investments, Fair Value	0	0	0	0	0	'	'	'
Loans Held-for-sale, Fair Value Disclosure	0	0	0	0	0	'	'	'
Net noncovered loans, Fair Value	0	0	0	0	0	'	'	'
Net covered loans and loss share receivable, Fair Value	0	0	0	0	0	'	'	'
Accrued interest receivable, Fair Value	0	0	0	0	0	'	'	'
Derivative Asset, Fair Value, Gross Asset	0	0	0	0	0	'	'	'
Financial liabilities:	'	'	'	'	'	'	'	'
Deposits, Fair Value	0	0	0	0	0	'	'	'
Federal funds purchased and securities sold under agreements to repurchase, Fair Value	0	0	0	0	0	'	'	'
Other Borrowings, Fair Value	0	0	0	0	0	'	'	'
Long-term Debt, Fair Value	0	0	0	0	0	'	'	'
Accrued interest payable, Fair Value	0	0	0	0	0	'	'	'
Derivative Liability, Fair Value, Gross Liability	0	0	0	0	0	'	'	'
Fair Value, Inputs, Level 2	'	'	'	'	'	'	'	'
Financial assets:	'	'	'	'	'	'	'	'
Cash and due from banks, Fair Value	0	0	0	0	0	'	'	'
Available-for-sale Securities, Carrying Amount	3,112,553,000	2,930,401,000	3,112,553,000	2,930,401,000	2,922,527,000	'	'	'
Held-to-maturity Securities, Fair Value	'	2,658,433,000	'	2,658,433,000	2,824,240,000	'	'	'
Other Investments, Fair Value	'	270,369,000	'	270,369,000	180,803,000	'	'	'
Loans Held-for-sale, Fair Value Disclosure	19,512,000	17,813,000	19,512,000	17,813,000	11,622,000	'	'	'
Net noncovered loans, Fair Value	0	0	0	0	0	'	'	'
Net covered loans and loss share receivable, Fair Value	0	0	0	0	0	'	'	'
Accrued interest receivable, Fair Value	65,736,000	49,820,000	65,736,000	49,820,000	52,929,000	'	'	'
Derivative Asset, Fair Value, Gross Asset	43,097,000	53,839,000	43,097,000	53,839,000	47,902,000	'	'	'
Financial liabilities:	'	'	'	'	'	'	'	'
Deposits, Fair Value	19,370,624,000	19,508,531,000	19,370,624,000	19,508,531,000	19,532,368,000	'	'	'
Federal funds purchased and securities sold under agreements to repurchase, Fair Value	'	1,049,801,000	'	1,049,801,000	851,535,000	'	'	'
Other Borrowings, Fair Value	611,753,000	204,461,000	611,753,000	204,461,000	204,124,000	'	'	'
Long-term Debt, Fair Value	259,051,000	321,255,000	259,051,000	321,255,000	319,711,000	'	'	'
Accrued interest payable, Fair Value	5,310,000	5,884,000	5,310,000	5,884,000	9,339,000	'	'	'
Derivative Liability, Fair Value, Gross Liability	48,765,000	65,506,000	48,765,000	65,506,000	58,201,000	'	'	'
Level 3	'	'	'	'	'	'	'	'
Financial assets:	'	'	'	'	'	'	'	'
Cash and due from banks, Fair Value	0	0	0	0	0	'	'	'
Available-for-sale Securities, Carrying Amount	347,521,000	322,762,000	347,521,000	322,762,000	347,611,000	'	'	'
Held-to-maturity Securities, Fair Value	0	0	0	0	0	'	'	'
Other Investments, Fair Value	0	0	0	0	0	'	'	'
Loans Held-for-sale, Fair Value Disclosure	0	0	0	0	0	'	'	'
Net noncovered loans, Fair Value	11,995,816,000	9,623,848,000	11,995,816,000	9,623,848,000	10,017,722,000	'	'	'
Net covered loans and loss share receivable, Fair Value	382,175,000	608,732,000	382,175,000	608,732,000	547,943,000	'	'	'
Accrued interest receivable, Fair Value	0	0	0	0	0	'	'	'
Derivative Asset, Fair Value, Gross Asset	0	0	0	0	0	'	'	'
Financial liabilities:	'	'	'	'	'	'	'	'
Deposits, Fair Value	0	0	0	0	0	'	'	'
Federal funds purchased and securities sold under agreements to repurchase, Fair Value	0	0	0	0	0	'	'	'
Other Borrowings, Fair Value	0	0	0	0	0	'	'	'
Long-term Debt, Fair Value	0	0	0	0	0	'	'	'
Accrued interest payable, Fair Value	0	0	0	0	0	'	'	'
Derivative Liability, Fair Value, Gross Liability	515,000	0	515,000	0	0	'	'	'
Originated Loans	'	'	'	'	'	'	'	'
Financial assets:	'	'	'	'	'	'	'	'
Loans and Leases Receivable, Net Amount	11,980,876,000	9,690,848,000	11,980,876,000	9,690,848,000	10,116,903,000	'	'	'
Acquired Loans	'	'	'	'	'	'	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'	'	'	'	'	'	'
Loans Receivable, Fair Value Disclosure	'	'	'	'	3,627,275,000	'	'	'
Financial assets:	'	'	'	'	'	'	'	'
Loans and Leases Receivable, Net Amount	2,738,898,000	3,817,421,000	2,738,898,000	3,817,421,000	3,494,874,000	'	'	'
Net noncovered loans, Fair Value	2,869,303,000	3,817,421,000	2,869,303,000	3,817,421,000	'	'	'	'
Acquired Loans | Fair Value, Inputs, Level 1	'	'	'	'	'	'	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'	'	'	'	'	'	'
Loans Receivable, Fair Value Disclosure	'	'	'	'	0	'	'	'
Financial assets:	'	'	'	'	'	'	'	'
Net noncovered loans, Fair Value	0	0	0	0	'	'	'	'
Acquired Loans | Fair Value, Inputs, Level 2	'	'	'	'	'	'	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'	'	'	'	'	'	'
Loans Receivable, Fair Value Disclosure	'	'	'	'	0	'	'	'
Financial assets:	'	'	'	'	'	'	'	'
Net noncovered loans, Fair Value	0	0	0	0	'	'	'	'
Acquired Loans | Level 3	'	'	'	'	'	'	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'	'	'	'	'	'	'
Loans Receivable, Fair Value Disclosure	'	'	'	'	3,627,275,000	'	'	'
Financial assets:	'	'	'	'	'	'	'	'
Net noncovered loans, Fair Value	$2,869,303,000	'	$2,869,303,000	'	'	'	'	'

Fair_Value_Measurement_Narrati

Fair Value Measurement (Narrative) (Details Textual) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'	'	'	'
Mortgage Servicing Rights	$22,189,000	$22,923,000	$22,189,000	$22,923,000	$22,760,000	$22,150,000	$22,604,000	$21,316,000
Mortgage Servicing rights Valuation Allowance	505,000	-572,000	505,000	-572,000	282,000	562,000	482,000	-2,564,000
Mortgage Servicing Rights Net Carrying balance	21,684,000	22,351,000	21,684,000	22,351,000	22,500,000	'	'	'
Mortgage Servicing Rights (MSR) Impairment (Recovery)	57,000	-90,000	-223,000	-1,992,000	2,300,000	'	'	'
Impaired Collateral Dependant Loans, Recorded Investment	59,900,000	51,300,000	59,900,000	51,300,000	52,600,000	'	'	'
Determination Of Specific Allowance For Loan Losses	4,500,000	3,100,000	4,500,000	3,100,000	4,800,000	'	'	'
Collateral Dependant Impaired and Non Accrual Loans Carrying Amount	55,400,000	48,100,000	55,400,000	48,100,000	47,900,000	'	'	'
Impairment of Real Estate	700,000	300,000	'	'	1,400,000	'	'	'
Impairment of Covered Other Real Esate Owned	100,000	200,000	'	'	1,000,000	'	'	'
Percent of available for sale securities classified as level 2	90.00%	'	90.00%	'	'	'	'	'
Percentage of Level 3 investments in available for sale investment portfolio	10.00%	'	10.00%	'	'	'	'	'
True up liability, discount period	'	'	'10 years	'	'	'	'	'
True-up Liabitlity Discount Rate	3.31%	3.59%	3.31%	3.59%	'	'	'	'
True-up Liability Effect of Change in Discount Rate By One Percent	700,000	'	700,000	'	'	'	'	'
True-up Liability Effect of Change in Discount Rate Decrease by One Percent	-700,000	'	-700,000	'	'	'	'	'
Number of loans that were 90 days or more past due, or were any on nonaccrual status	'	'	0	'	'	'	'	'
Midwest	'	'	'	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'	'	'	'
Estimated fair value of true up liability	8,000,000	7,300,000	8,000,000	7,300,000	7,100,000	'	'	'
Percent of cumulative shared loss payments under loss sharing agreements	25.00%	'	25.00%	'	'	'	'	'
Percent of FDIC Intrinsic Loss Estimate	20.00%	'	20.00%	'	'	'	'	'
Intrinsic Loss Estimate of the FDIC	152,000,000	'	152,000,000	'	'	'	'	'
Percent of Asset Premium Paid	25.00%	'	25.00%	'	'	'	'	'
Asset Premium Paid	21,000,000	'	21,000,000	'	'	'	'	'
George Washington	'	'	'	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'	'	'	'
Estimated fair value of true up liability	4,800,000	4,200,000	4,800,000	4,200,000	4,300,000	'	'	'
Percent of excess threshold paid by the Bank under loss sharing agreements	50.00%	'	50.00%	'	'	'	'	'
Percent Theshold of Loss Sharing Agreements Paid by Bank	20.00%	'	20.00%	'	'	'	'	'
Stated Threshold of Loss Sharing Agreements Paid by Bank	34,400,000	'	34,400,000	'	'	'	'	'
Percent of Asset Discount Under Loss Sharing Percent of Asset Discount Under Loss Sharing Agreements	25.00%	'	25.00%	'	'	'	'	'
Stated amount of Asset Discount Under Loss Sharing Agreements	$12,000,000	'	$12,000,000	'	'	'	'	'
Percent of cumulative shared loss payments under loss sharing agreements	25.00%	'	25.00%	'	'	'	'	'

Mortgage_Servicing_Rights_and_2

Mortgage Servicing Rights and Mortgage Servicing Activity-Changes in the carrying amount of mortgage servicing rights (Details) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Apr. 12, 2013

Sep. 30, 2014

Sep. 30, 2013

Fair Value, Inputs, Level 3

Fair Value, Inputs, Level 3

Fair Value, Inputs, Level 3

Citizens Republic Bancorp

Mortgage Servicing Rights [Member]

Mortgage Servicing Rights [Member]

Residential Mortgages

Residential Mortgages

Citizens Republic Bancorp

Citizens Republic Bancorp

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

'

'

'

'

'

'

'

'

'

'

'

'

'

Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor Servicing Assets or Liabilities Impact of Twenty Five Percent Adverse Change in Prepayment Speed

$1,813,000

'

$1,813,000

'

'

'

'

'

'

'

'

'

'

Servicing Asset

'

'

'

'

'

'

'

'

'

'

'

2,600,000,000

2,700,000,000

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets

'

'

'

'

'

'

'

'

'

'

1,065,000

'

'

Mortage Servicing Rights Amortized Value [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

Mortgage Servicing Rights Beginning of Period

22,150,000

22,604,000

22,760,000

21,316,000

21,316,000

'

'

'

0

0

0

'

'

Mortgage Servicing Rights Additions

1,035,000

1,450,000

2,242,000

4,151,000

'

'

'

'

'

'

'

'

'

Amortization of Mortgage Servicing Rights (MSRs)

996,000

-1,131,000

2,813,000

-3,609,000

'

'

'

'

'

'

'

'

'

Mortgage Servicing Rights, End of Period

22,189,000

22,923,000

22,189,000

22,923,000

22,760,000

'

'

'

0

0

0

'

'

Mortage Servicing Rights Valuation Rollforward [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

Mortgage Servicing rights Valuation Allowance Beginning of Period

562,000

482,000

282,000

-2,564,000

-2,564,000

'

'

'

'

'

'

'

'

Mortgage Servicing Rights (MSR) Impairment (Recovery)

57,000

-90,000

-223,000

-1,992,000

2,300,000

'

'

'

'

'

'

'

'

Mortgage Servicing rights Valuation Allowance, End of Period

505,000

-572,000

505,000

-572,000

282,000

'

'

'

'

'

'

'

'

Mortgage Servicing Rights Net Carrying balance

21,684,000

22,351,000

21,684,000

22,351,000

22,500,000

'

'

'

'

'

'

'

'

Fair Value of Mortgage Servicing Rights

$22,229,000

[1]

$22,616,000

$22,229,000

[1]

$22,616,000

$23,041,000

[1]

$22,229,000

$23,041,000

$22,616,000

'

'

'

'

'

[1]

(b) - MSRs with a recorded investment of $22.2 million were reduced by a specific valuation allowance totaling $0.5 million to a reported carrying value of $21.7 million resulting in recognition of $0.1 million in recoveries included in loans sales and servicing income in the three months ended SeptemberB 30, 2014.

Mortgage_Servicing_Rights_and_3

Mortgage Servicing Rights and Mortgage Servicing Activity Mortgage Servicing Rights and Mortgage Servicing Activity-Changes in Key Economic Assumptions (Details) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014
Changes in Key Assumptions [Abstract]	'	'
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor Servicing Assets or Liabilities Impact of Two Hundred Basis Point Adverse Change in Discount Rate	$1,352	$1,352
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	'	9.89%
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor Servicing Assets or Liabilities Impact of Hundred Basis Point Adverse Change in Discount Rate	699	699
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	'	10.88%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Weighted Average Life	'101 months 15 days	'
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed	$753	$753

Mortgage_Servicing_Rights_and_4

Mortgage Servicing Rights and Mortgage Servicing Activity (Details Textual) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Servicing Assets at Fair Value [Line Items]	'	'	'	'	'	'
Mortgage Servicing Rights	$22,189,000	$22,923,000	$22,150,000	$22,760,000	$22,604,000	$21,316,000
Unpaid principal balances from sale of residential mortgage loans	257,000,000	468,800,000	'	'	'	'
Recognized pretax gains	5,400,000	10,800,000	'	'	'	'
Related mortgage servicing rights from loans sold and receives servicing fees	228,500,000	431,900,000	'	'	'	'
Minimum percentage adverse change in prepayment speed	10.00%	'	'	'	'	'
Maximum percentage adverse change in prepayment speed	25.00%	'	'	'	'	'
Percentage of variation in prepayment speed	10.00%	'	'	'	'	'
Residential Mortgages	'	'	'	'	'	'
Servicing Assets at Fair Value [Line Items]	'	'	'	'	'	'
Loan servicing fees	4,900,000	4,700,000	'	'	'	'
Servicing Asset	$2,600,000,000	$2,700,000,000	'	'	'	'

Commitments_and_ContingenciesS

Commitments and Contingencies-Schedule of Commitments to Extend Credit (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'	'
Loan Commitments	$6,002,231	$5,546,635	$5,578,342
Commercial Loan	'	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'	'
Loan Commitments	3,640,755	3,367,625	3,521,227
Total consumer	'	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'	'
Loan Commitments	$2,361,476	$2,179,010	$2,057,115

Commitments_and_Contingencies_1

Commitments and Contingencies (Schedule of Guarantor Obligations) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Guarantor Obligations [Line Items]	'	'	'
Guarantor Obligations, Short-Term	$142,300,000	'	'
Guarantor Obligations, Current Carrying Value	271,095,000	241,482,000	251,717,000
Standby Letters of Credit	'	'	'
Guarantor Obligations [Line Items]	'	'	'
Guarantor Obligations, Current Carrying Value	227,835,000	196,400,000	200,835,000
Loans Sold with Recourse	'	'	'
Guarantor Obligations [Line Items]	'	'	'
Guarantor Obligations, Current Carrying Value	$43,260,000	$45,082,000	$50,882,000

Commitments_and_Contingencies_2

Commitments and Contingencies (Schedule of Changes in Repurchase Reserve) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Apr. 12, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Financing Receivable, Repurchase Reserve, Assumed Obligation	'	$0	'	$0	$6,000
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'	'
Financing Receivable, Repurchase Reserve, Beginning Balance	9,022	8,393	9,851	2,667	'
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	-600	-1,983	-3,357	-3,053	'
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	250	2,549	2,178	3,345	'
Financing Receivable, Repurchase Reserve, Ending Balance	8,672	8,959	8,672	8,959	'
Residential Mortgages	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Financing Receivable, Repurchase Reserve, Assumed Obligation	'	0	'	0	6,000
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'	'
Financing Receivable, Repurchase Reserve, Beginning Balance	7,900	7,287	8,737	1,500	'
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	-600	-1,983	-3,357	-3,053	'
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	250	2,546	2,170	3,403	'
Financing Receivable, Repurchase Reserve, Ending Balance	7,550	7,850	7,550	7,850	'
Manufactured Housing	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Financing Receivable, Repurchase Reserve, Assumed Obligation	'	0	'	0	0
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'	'
Financing Receivable, Repurchase Reserve, Beginning Balance	1,122	1,106	1,114	1,167	'
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	0	0	0	0	'
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	0	3	8	-58	'
Financing Receivable, Repurchase Reserve, Ending Balance	$1,122	$1,109	$1,122	$1,109	'

Commitments_and_Contingencies_3

Commitments and Contingencies Litigation (Details)	Sep. 30, 2014
Overdraft litigation [Member]	'
Loss Contingencies [Line Items]	'
Loss Contingency, Pending Claims, Number	2
Merger litigation [Member]	'
Loss Contingencies [Line Items]	'
Loss Contingency, Pending Claims, Number	6

Commitments_and_Contingencies_4

Commitments and Contingencies (Narratives) (Details) (USD $)	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Asset sales [Line Items]	'	'	'	'	'	'
Financing Receivable, Repurchase Reserve	$8,672,000	$9,022,000	$9,851,000	$8,959,000	$8,393,000	$2,667,000
Allowance for Loan and Leases Losses, Reserve Associated with Loans Sold with Recourse	8,700,000	'	9,900,000	9,000,000	'	'
Allowance for Loan and Lease Losses, Unfunded Lending Commitments	7,000,000	'	7,900,000	8,500,000	'	'
Residential Mortgages	'	'	'	'	'	'
Asset sales [Line Items]	'	'	'	'	'	'
Financing Receivable, Loans Sold to Third Party Investors	33,000,000	'	34,600,000	38,200,000	'	'
Financing Receivable, Repurchase Reserve	7,550,000	7,900,000	8,737,000	7,850,000	7,287,000	1,500,000
Manufactured Housing	'	'	'	'	'	'
Asset sales [Line Items]	'	'	'	'	'	'
Financing Receivable, Loans Sold to Third Party Investors	6,400,000	'	'	'	'	'
Financing Receivable, Repurchase Reserve	1,122,000	1,122,000	1,114,000	1,109,000	1,106,000	1,167,000
Allowance for Loan and Leases Losses, Reserve Associated with Loans Sold with Recourse	$1,100,000	'	'	'	'	'
Overdraft litigation [Member]	'	'	'	'	'	'
Asset sales [Line Items]	'	'	'	'	'	'
Loss Contingency, Pending Claims, Number	2	'	'	'	'	'

Changes_and_Reclassifications_2

Changes and Reclassifications Out of Accumulated Other Comprehensive Income Schedule of Accumulated Other Comprehensive Income(Details) (USD $)	3 Months Ended			9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2013	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'	'	'	'	'
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax	($516)	'	$0	($1,614)	$0	'	'	'
Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Tax	-181	'	0	-565	0	'	'	'
Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Net of Tax	-335	'	0	-1,049	0	'	'	'
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	0	'	0	0	0	'	'	'
Accumulated Other Comprehensive Income (Loss), before Tax	-76,280	'	-128,634	-76,280	-128,634	'	'	'
accumulated other comprehensive income, tax	-26,697	'	-45,021	-26,697	-45,021	'	'	'
Accumulated other comprehensive loss	-49,583	'	-83,613	-49,583	-83,613	'	-66,876	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	-16,207	'	-17,491	24,293	-104,853	'	'	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	-5,672	'	-6,123	8,503	-36,699	'	'	'
Other Comprehensive Income (Loss), Arising During Period, Net of Tax	-10,535	'	-11,368	15,790	-68,154	'	'	'
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax	-563	'	-534	-1,551	-1,654	'	'	'
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Tax	-197	'	-187	-543	-579	'	'	'
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Net of Tax	-366	'	-347	-1,008	-1,075	'	'	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	14	'	-1	150	2,802	'	'	'
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	5	'	0	53	981	'	'	'
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	9	'	-1	97	1,821	'	'	'
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax	-53,800	-55,084	-110,188	-53,800	-110,188	-110,188	-57,812	-110,188
Accumulated other comprehensive income reclassifications, benefit plan, tax	-18,829	-19,279	-38,565	-18,829	-38,565	-38,565	'	'
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	-34,971	-35,805	-71,623	-34,971	-71,623	-71,623	-37,579	-71,623
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax	0	'	0	0	0	'	'	'
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0	'	0	0	0	'	'	'
Other Comprehensive Income Defined benefit plan, amortization of gains, before tax	768	'	0	2,398	0	'	'	'
Other comprehensive Income, Defined Benefit Plan, Amortization of Gains, tax	269	'	0	839	0	'	'	'
Other Comprehensive Income, Defined benefit plan, amortization of gains, after tax	499	'	0	1,559	0	'	'	'
Accumulated Net Unrealized Investment Gain (Loss)	'	'	'	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss), before Tax	-22,480	-5,696	-18,446	-22,480	-18,446	85,259	-45,072	-420
accumulated other comprehensive income, tax	-7,868	-1,994	-6,456	-7,868	-6,456	29,841	-15,775	-146
Accumulated other comprehensive loss	($14,612)	($3,702)	($11,990)	($14,612)	($11,990)	$55,418	($29,297)	($274)

Changes_and_Reclassifications_3

Changes and Reclassifications Out of Accumulated Other Comprehensive Income Tax Effect of Changes and Reclassifications Out of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss), before Tax	($76,280)	($128,634)	($76,280)	($128,634)	'	'	'	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	-14	1	-150	-2,802	'	'	'	'
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	-5	0	-53	-981	'	'	'	'
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	9	-1	97	1,821	'	'	'	'
Accumulated other comprehensive loss	-49,583	-83,613	-49,583	-83,613	'	-66,876	'	'
accumulated other comprehensive income, tax	-26,697	-45,021	-26,697	-45,021	'	'	'	'
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax	-53,800	-110,188	-53,800	-110,188	-55,084	-57,812	-110,188	-110,188
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Tax	-197	-187	-543	-579	'	'	'	'
Accumulated Net Unrealized Investment Gain (Loss)	'	'	'	'	'	'	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss), before Tax	-22,480	-18,446	-22,480	-18,446	-5,696	-45,072	-420	85,259
Accumulated other comprehensive loss	-14,612	-11,990	-14,612	-11,990	-3,702	-29,297	-274	55,418
accumulated other comprehensive income, tax	($7,868)	($6,456)	($7,868)	($6,456)	($1,994)	($15,775)	($146)	$29,841