FirstMerit (FMER) 10-Q 2 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	3 Months Ended
	Mar. 31, 2016	Apr. 28, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	FIRSTMERIT CORP /OH/
Entity Central Index Key	354,869
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		166,490,890

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
ASSETS
Cash and due from banks	$ 331,049	$ 380,799	$ 426,247
Interest-bearing deposits in banks	428,848	83,018	106,178
Total cash and cash equivalents	759,897	463,817	532,425
Investment securities:
Held-to-maturity	2,613,700	2,674,093	2,855,174
Available-for-sale	4,104,214	3,967,735	3,791,059
Other investments	148,159	148,172	148,475
Loans held for sale	5,249	5,472	3,568
Loans	16,225,450	16,076,945	15,490,889
Allowance for loan losses	(151,937)	(153,691)	(146,552)
Net loans	16,073,513	15,923,254	15,344,337
Premises and equipment, net	305,764	319,488	320,392
Goodwill	741,740	741,740	741,740
Intangible assets	58,324	60,628	68,422
Covered other real estate	783	2,134	40,231
Accrued interest receivable and other assets	1,251,306	1,218,071	1,272,297
Total assets	26,062,649	25,524,604	25,118,120
Deposits:
Noninterest-bearing	6,055,569	5,942,248	5,666,752
Interest-bearing	3,641,216	3,476,729	3,277,118
Savings and money market accounts	9,231,829	8,450,123	8,610,553
Certificates and other time deposits	2,172,752	2,238,903	2,371,172
Total deposits	21,101,366	20,108,003	19,925,595
Federal funds purchased and securities sold under agreements to repurchase	719,850	1,037,075	1,113,371
Wholesale borrowings	378,996	580,648	316,628
Long-term debt	519,249	505,173	512,625
Accrued taxes, expenses and other liabilities	345,231	353,610	361,115
Total liabilities	23,064,692	22,584,509	22,229,334
Shareholders' equity:
5.875% Non-Cumulative Perpetual Preferred Stock, Series A, without par value: authorized 115,000 shares; 100,000 issued	100,000	100,000	100,000
Common Stock warrant	0	0	3,000
Common Stock, without par value; authorized 300,000,000 shares; issued: March 31, 2016, December 31, 2015 and March 31, 2015 - 170,183,515 shares	127,937	127,937	127,937
Capital surplus	1,390,516	1,386,677	1,394,933
Accumulated other comprehensive loss	(48,341)	(79,274)	(49,267)
Retained earnings	1,543,976	1,519,438	1,433,926
Treasury stock, at cost: March 31, 2016 - 4,463,581; December 31, 2015 - 4,425,927; March 31, 2015 - 4,730,374 shares	(116,131)	(114,683)	(121,743)
Total shareholders' equity	2,997,957	2,940,095	2,888,786
Total liabilities and shareholders' equity	$ 26,062,649	$ 25,524,604	$ 25,118,120

Consolidated Balance Sheets Par

Consolidated Balance Sheets Parenthetical - shares	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Statement of Financial Position [Abstract]
Common stock, shares authorized	300,000,000	300,000,000	300,000,000
Common stock, shares issued	170,183,515	170,183,515	170,183,515
Non-cumulative Perpetual Preferred Stock, Series A, Shares Authorized	115,000	115,000	115,000
Non-Cumulative Perpetual Preferred stock, Series A, Shares Outstanding	100,000	100,000	100,000
Treasury stock, at cost	4,463,581	4,425,927	4,730,374

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest income:
Loans and loans held for sale	$ 162,278	$ 161,539
Investment securities:
Taxable	33,149	31,950
Tax-exempt	5,261	6,026
Total investment securities interest	38,410	37,976
Total interest income	200,688	199,515
Deposits:
Interest bearing	929	767
Savings and money market accounts	5,652	5,547
Certificates and other time deposits	3,289	2,177
Federal funds purchased and securities sold under agreements to repurchase	265	243
Wholesale borrowings	1,234	1,160
Long-term debt	4,163	3,998
Total interest expense	15,532	13,892
Net interest income	185,156	185,623
Provision for loan losses	7,809	8,248
Net interest income after provision for loan losses	177,347	177,375
Noninterest income:
Trust department income	10,284	10,149
Service charges on deposits	15,586	15,668
Credit card fees	13,578	12,649
ATM and other service fees	6,234	6,099
Bank owned life insurance income	3,696	3,592
Investment services and insurance	3,905	3,704
Investment securities gains/(losses), net	295	354
Loan sales and servicing income	1,852	1,600
Other operating income	11,964	12,032
Total noninterest income	67,394	65,847
Noninterest expense:
Salaries, wages, pension and employee benefits	85,880	90,526
Net occupancy expense	14,774	15,954
Equipment expense	12,408	11,025
Stationery, supplies and postage	3,619	3,528
Bankcard, loan processing and other costs	11,008	11,139
Professional services	8,351	4,010
Amortization of intangibles	2,304	2,598
FDIC insurance expense	5,445	5,167
Other operating expense	23,174	16,705
Total noninterest expense	166,963	160,652
Income before income tax expense	77,778	82,570
Income tax expense	23,642	25,431
Net income	54,136	57,139
Less: Net income allocated to participating shareholders	387	407
Preferred Stock dividends	1,469	1,469
Net income attributable to common shareholders	52,280	55,263
Net income used in diluted EPS calculation	$ 52,280	$ 55,263
Weighted average number of common shares outstanding - basic	165,745	165,411
Weighted average number of common shares outstanding - diluted	166,239	166,003
Basic earnings per common share (in dollars per share)	$ 0.32	$ 0.33
Diluted earnings per common share (in dollars per share)	0.31	0.33
Cash dividend per common share (in dollars per share)	$ 0.17	$ 0.16

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net Income, Pretax	$ 77,778	$ 82,570
Net Income, Tax	23,642	25,431
Net income	54,136	57,139
Changes in unrealized securities' holding gains/(losses), before Tax	48,379	34,117
Changes in unrealized securities' holding gains/(losses), Tax	17,562	11,941
Changes in unrealized securities' holding gains/(losses), After-tax	30,817	22,176
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred from available-for-sale to held-to-maturity, before Tax	(1,441)	(504)
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred from available-for-sale to held-to-maturity, Tax	(147)	(176)
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred from available-for-sale to held-to-maturity , Net of Tax	(1,294)	(328)
Net losses/(gains) realized on sale of securities reclassified to noninterest income, before Tax	295	(354)
Net losses/(gains) realized on sale of securities reclassified to noninterest income, Tax	107	(124)
Net losses/(gains) realized on sale of securities reclassified to noninterest income, Net of Tax	(188)	230
Net change in unrealized gains/(losses) on securities available for sale, before Tax	47,233	33,259
Net change in unrealized gains/(losses) on securities available for sale, Tax	17,522	11,641
Net change in unrealized gains/(losses) on securities available for sale, Net of Tax	29,711	21,618
Amortization of actuarial losses/(gains), before Tax	2,168	1,138
Amortization of actuarial losses/(gains), Tax	773	398
Amortization of actuarial losses/(gains), Net of Tax	1,395	740
Amortization of prior service cost reclassified to other noninterest expense, before Tax	(260)	410
Amortization of prior service cost reclassified to other noninterest expense, Tax	(87)	143
Amortization of prior service cost reclassified to other noninterest expense, After-tax	(173)	267
Net change from defined benefit pension plans, before Tax	1,908	1,548
Net change from defined benefit pension plans, Tax	686	541
Net change from defined benefit pension plans, Net of Tax	1,222	1,007
Total other comprehensive gains/(losses), before Tax	49,141	34,807
Total other comprehensive gains/(losses), Tax	18,208	12,182
Total other comprehensive gains/(losses), Net of Tax	30,933	22,625
Comprehensive Income, before Tax, Portion Attributable to Parent	126,919	117,377
Comprehensive Income, Tax, Portion Attributable to Parent	41,850	37,613
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 85,069	$ 79,764

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Warrant	Capital Surplus	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
Beginning Balance at Dec. 31, 2014	$ 2,834,281	$ 100,000	$ 127,937	$ 3,000	$ 1,393,090	$ (71,892)	$ 1,404,717	$ (122,571)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	57,139						57,139
Other comprehensive income	22,625					22,625
Comprehensive income	79,764					22,625	57,139
Dividends, Preferred Stock, Cash	(1,469)						(1,469)
Cash dividends - common stock	(26,461)						(26,461)
Nonvested (restricted) shares granted	0				(2,631)			2,631
Restricted Stock Activity	(970)				326			(1,296)
Deferred compensation trust	0				507			(507)
Share-based compensation	3,641				3,641
Ending Balance at Mar. 31, 2015	2,888,786	100,000	127,937	3,000	1,394,933	(49,267)	1,433,926	(121,743)
Beginning Balance at Dec. 31, 2015	2,940,095	100,000	127,937	0	1,386,677	(79,274)	1,519,438	(114,683)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	54,136					0	54,136
Other comprehensive income	30,933					30,933
Comprehensive income	85,069					30,933	54,136
Dividends, Preferred Stock, Cash	(1,469)					0	(1,469)
Cash dividends - common stock	(28,129)						(28,129)
Nonvested (restricted) shares granted	0				(364)			364
Restricted Stock Activity	(888)				272			(1,160)
Deferred compensation trust	0				652			(652)
Share-based compensation	3,279				3,279			0
Ending Balance at Mar. 31, 2016	$ 2,997,957	$ 100,000	$ 127,937	$ 0	$ 1,390,516	$ (48,341)	$ 1,543,976	$ (116,131)

Consolidated Statements of Cha7

Consolidated Statements of Changes in Shareholders' Equity (parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Stockholders' Equity [Abstract]
Cash dividend per common share (in dollars per share)	$ 0.17	$ 0.16
Options exercised in the period	0	0
Nonvested (restricted) shares granted	17,107	129,444
Restricted stock activity	(54,761)	(66,252)
Deferred compensation trust	(239,200)	(163,965)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Activities
Net income	$ 54,136	$ 57,139
Adjustments to reconcile net income to net cash provided and used by operating activities:
Provision for loan losses	7,809	8,248
Provision/(benefit) for deferred income taxes	(292)	(1,663)
Depreciation and amortization	16,339	14,739
Benefit attributable to FDIC loss share	269	4,227
Accretion of acquired loans	(17,890)	(26,339)
Amortization and accretion of investment securities, net
Available-for-sale	2,355	2,680
Held-to-maturity	744	814
Losses/(gains) on sales and calls of available-for-sale investment securities, net	0	354
Originations of loans held for sale	(7,493)	(40,442)
Proceeds from sales of loans, primarily mortgage loans sold in the secondary markets	7,920	50,868
Gains on sales of loans, net	(204)	(566)
Amortization of intangible assets	2,304	2,598
Change in unrealized securities' holdings/(losses)	0	0
Recognition of stock compensation expense	3,279	3,641
Net decrease/(increase) in other assets	(39,766)	(48,684)
Net increase/(decrease) in other liabilities	6,238	25,224
NET CASH PROVIDED BY OPERATING ACTIVITIES	35,748	52,130
Proceeds from sale of investment securities
Available-for-sale	0	39,302
Held-to-maturity	0	1,015
Proceeds from prepayments, calls, and maturities of investment securities
Available-for-sale	150,299	129,296
Held-to-maturity	91,890	92,241
Other	0	166
Purchases of investment securities
Available-for-sale	(249,424)	(404,163)
Held-to-maturity	(33,669)	(46,164)
Other	0	0
Net decrease/(increase) in loans and leases	(146,288)	(152,359)
Purchases of premises and equipment	(58)	(5,795)
Sales of premises and equipment	3,582	7,965
NET CASH PROVIDED/(USED) BY INVESTING ACTIVITIES	(183,668)	(338,496)
Financing Activities
Net increase in demand accounts	277,808	128,320
Net increase/(decrease) in savings and money market accounts	781,706	210,941
Net decrease in certificates and other time deposits	(66,151)	81,669
Net increase/(decrease) in securities sold under agreements to repurchase	(317,225)	(159,220)
Net increase/(decrease) in wholesale borrowings	(201,652)	(111,443)
Cash dividends - common	(28,129)	(26,461)
Cash dividends - preferred	(1,469)	(1,469)
Restricted stock activity	(888)	(970)
NET CASH PROVIDED/(USED) BY FINANCING ACTIVITIES	444,000	121,367
Increase/(Decrease) in cash and cash equivalents	296,080	(164,999)
Cash and cash equivalents at beginning of year	463,817	697,424
Cash and cash equivalents at end of year	759,897	532,425
Cash paid during period for:
Interest	16,197	14,036
Federal income taxes	$ 0	$ 2,000

Significant Accounting Policies

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Significant Accounting Policies	FirstMerit Corporation and subsidiaries is a diversified financial services company headquartered in Akron, Ohio with 368 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. On January 26, 2016, the Corporation and Huntington Bancshares Incorporated (“Huntington”)announced the signing of a definitive merger agreement under which the Corporation will merge into a subsidiary of Huntington in a stock and cash transaction. Based on the closing price of Huntington's common shares on January 25, 2016 of $8.80, the total transaction value is approximately $3.40 billion, including outstanding options and other equity-linked securities. Under the terms of the definitive agreement, the Corporation will merge with a subsidiary of Huntington Bancshares, and FirstMerit Bank will merge with and into The Huntington National Bank. In conjunction with the closing of the transaction, four independent members of the Corporation’s Board of Directors will join the Huntington Board, which will be expanded accordingly. Shareholders of the Corporation will receive 1.72 shares of Huntington common stock, and $5.00 in cash, for each share of the Corporation common stock. The per share consideration is valued at $20.14 per share based on the closing price of Huntington Common Stock on January 25, 2016. The transaction is expected to be completed in the third quarter of 2016, subject to the satisfaction of customary closing conditions, including regulatory approvals and the approval of the shareholders of Huntington and the Corporation. 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, 2015 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 March 31, 2016 and 2015 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, 2015 (the “ 2015 Form 10-K”). There have been no significant changes in the current quarter to the Corporation’s accounting policies as disclosed in the 2015 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 2015-16, Business Combinations (Topic 805), Simplifying the Accounting for Measurement-Period Adjustments. The amendments in ASU 2015-16 require an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. For public business entities, the amendments in this update are effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. The amendments in this update will be applied prospectively to adjustments to provisional amounts that occur after the effective date of this update with earlier application permitted for financial statements that have not been issued. The adoption of this guidance did not have a material effect on the Corporation's financial position or results of operations. FASB ASU 2015-5 , Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. The amendments in ASU 2015-05 provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The guidance will not change GAAP for a customer’s accounting for service contracts. In addition, the guidance in this update supersedes 350-40-25-16. Consequently, all software licenses within the scope of Subtopic 350-40 will be accounted for consistent with other licenses of intangible assets. The amendments are effective for public business entities for annual and interim periods within those annual periods, beginning after December 15, 2015. An entity can elect to adopt the amendments either (1) prospectively to all arrangements entered into or materially modified after the effective date or (2) retrospectively. For prospective transition, the only disclosure requirements at transition are the nature of and reason for the change in accounting principle, the transition method, and a qualitative description of the financial statement line items affected by the change. For retrospective transition, the disclosure requirements at transition include the requirements for prospective transition and quantitative information about the effects of the accounting change. The adoption of this guidance did not have a material effect on the Corporation's financial position or results of operations. FASB ASU 2015-2, Amendments to the Consolidation Analysis . The amendments in ASU 2015-02 affect reporting entities that are required to evaluate whether they should consolidate certain legal entities. All legal entities are subject to reevaluation under the revised consolidation model. These amendments modify the current accounting guidance to address limited partnerships and similar entities; certain investments funds, fees paid to a decision maker or service provider, and the impact of fee arrangements and related parties on the primary beneficiary determination. The amendments are effective for public business entities for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. A reporting entity may apply the amendments using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption. A reporting entity also may apply the amendments retrospectively. The adoption of this guidance did not 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 adoption of this guidance did not have a material effect on the Corporation's financial position or results of operations. Recently Issued Accounting Standards ASU 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing . This update amends the new revenue recognition guidance on accounting for licenses of intellectual property and identifying performance obligations. The amendments clarify how an entity should evaluate the nature of its promise in granting a license of intellectual property, which will determine whether it recognizes revenue over time or a point in time. The amendments also clarify when a promised good or service is separately identifiable, that is distinct within the context of the contract, and allow entities to disregard items that are immaterial in the context of a contract. The effective date and transition requirements for this update are the same as those of the new standard. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, with early adoption permitted, but not before December 15, 2016. The amendments can be adopted using either the full retrospective approach or a modified retrospective approach. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures. FASB ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting . The amendments in ASU 2016-09 simplify several aspects of accounting for employee share-based payments including income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Some areas of the simplification apply only to nonpublic entities. The new guidance will require all income tax effects of awards to be recognized as income tax expense or benefit in the income statement when the awards vest or are settled and additional paid in capital pools will be eliminated. The guidance requires companies to present excess tax benefits as an operating activity on the statement of cash flows rather than as a financing activity. Companies will be required to account for forfeitures of share-based payments by recognizing forfeitures of awards as they occur or estimating the number of awards expected to be forfeited and adjusting the estimate when it is likely to change, as currently required, through an accounting policy election. The guidance will increase the amount an employer can withhold to cover income taxes on awards and still qualify for the exception to liability classification for shares used to satisfy the employer's income tax withholding obligation. The guidance requires an employer to classify the cash paid to a tax authority when shares are withheld to satisfy its statutory income tax withholding obligation as a financing activity on the statement of cash flows. For public business entities, the amendments in this update are effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. Early adoption will be permitted in any interim or annual period for which financial statements have not yet been issued or have not been made available for issuance, however all of the guidance must be adopted in the same period. If early adoption is elected in an interim period, any adjustments should be reflected as of the beginning of the annual period that includes that interim period. The adoption of this guidance is not expected to have a material effect on the Corporation’s financial position or results of operations. FASB ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net). The amendments in ASU 2016-08 are intended to improve the operability and understandability of the implementation guidance by clarifying the following: how an entity should identify the unit of accounting for the principal versus agent evaluation; how the control principle applies to transactions, such as service arrangements; reframes the indicators to focus on a principal rather than an agent, removes the credit risk and commission indicators and clarifies the relationship between the control principle and the indicators; and revises the existing illustrative examples and adds new illustrative examples. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, with early adoption permitted, but not before December 15, 2016. The amendments can be adopted using either the full retrospective approach or a modified retrospective approach. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures. FASB ASU 2016-07, Investments—Equity Method and Joint Ventures (Topic 323) , The amendments in this update eliminate the requirement that when an investment qualifies for use of the equity method due to an increase in level of ownership or influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by step basis as if the equity method had been in effect during all previous periods that the investment had been held. For public business entities, the amendments in this update are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted. The amendments should be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures FASB ASU 2016-06, Derivatives and Hedging (Topic 815), Contingent Put and Call Options in Debt Instruments . The amendments in this update clarify the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. An entity performing the assessment under the amendments in this update is required to assess the embedded call (put) options solely in accordance with the four-step decision sequence. For public business entities, the amendments in this update are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. An entity should apply the amendments in this update on a modified retrospective basis to existing debt instruments as of the beginning of the fiscal year for which the amendments are effective. Early adoption is permitted, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures. FASB ASU 2016-05, Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on The amendments in ASU 2016-05 clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument under Topic 815 does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria (including those in paragraphs 815-20-35-14 through 35-18) continue to be met. For public business entities, the amendments in this update are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures. FASB ASU 2016-02, Leases (Topic 842), The amendments in ASU 2016-02 increase transparency and comparability by requiring a lessee to recognize assets and liabilities for operating and capital leases with lease terms of more than 12 months. Additional qualitative and quantitative requirements disclosures are required to provide additional information to better understand the amount, timing, and uncertainty of cash flows arising from leases. Lessor accounting will remain largely unchanged from current GAAP. For public business entities, the amendments in this update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures. FASB ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in this update supersede the guidance to classify equity securities with readily determinable fair values into different categories (that is, trading or available-for-sale) and require equity securities (including other ownership interests, such as partnerships, unincorporated joint ventures, and limited liability companies) to be measured at fair value with changes in the fair value recognized through net income. The amendments allow equity investments that do not have readily determinable fair values to be remeasured at fair value either upon the occurrence of an observable price change or upon identification of an impairment. The amendments also require enhanced disclosures about those investments. The amendments improve financial reporting by providing relevant information about an entity’s equity investments and reducing the number of items that are recognized in other comprehensive income. For public business entities, the amendments in this update are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The amendments should be applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The adoption of this 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 . In May 2014, the FASB issued new accounting guidance that revises the criteria for determining when to recognize revenue from contracts with customers and expands disclosure requirements. The amendments in this update supersede virtually all existing GAAP revenue recognition guidance, including most industry-specific revenue recognition guidance. 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. On July 9, 2015, the FASB decided to delay, by one year, the effective dates, permitting public entities to apply this guidance to annual reporting periods beginning after December 15, 2017, with early adoption permitted, but not before December 15, 2016. The amendments can be adopted using either the full retrospective approach or a modified retrospective approach. There are many aspects of this new accounting guidance that are still being interpreted, and the FASB has recently issued updates to certain aspects of the guidance as noted above. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures.

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2016
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. March 31, 2016 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale Debt securities U.S. government agency debentures $ 2,500 $ 20 $ — $ 2,520 U.S. states and political subdivisions 169,281 3,894 (34 ) 173,141 Residential mortgage-backed securities: U.S. government agencies 889,511 18,398 (253 ) 907,656 Commercial mortgage-backed securities: U.S. government agencies 181,846 2,654 (252 ) 184,248 Residential collateralized mortgage-backed securities: U.S. government agencies 2,214,035 20,761 (8,059 ) 2,226,737 Non-agency 4 — — 4 Commercial collateralized mortgage-backed securities: U.S. government agencies 269,197 3,976 (291 ) 272,882 Asset-backed securities: Collateralized loan obligations 297,885 36 (12,524 ) 285,397 Corporate debt securities 61,724 — (12,968 ) 48,756 Total debt securities 4,085,983 49,739 (34,381 ) 4,101,341 Equity securities Marketable equity securities 2,873 — — 2,873 Total equity securities 2,873 — — 2,873 Total securities available-for-sale $ 4,088,856 $ 49,739 $ (34,381 ) $ 4,104,214 Securities held-to-maturity Debt securities U.S. government agency debentures $ 25,000 $ 26 $ — $ 25,026 U.S. states and political subdivisions 558,795 17,285 (262 ) 575,818 Residential mortgage-backed securities: U.S. government agencies 88,314 1,280 (266 ) 89,328 Commercial mortgage-backed securities: U.S. government agencies 489,216 10,159 (212 ) 499,163 Residential collateralized mortgage-backed securities: U.S. government agencies 1,113,901 2,414 (14,257 ) 1,102,058 Commercial collateralized mortgage-backed securities: U.S. government agencies 251,421 2,436 (934 ) 252,923 Corporate debt securities 87,053 905 — 87,958 Total securities held-to-maturity $ 2,613,700 $ 34,505 $ (15,931 ) $ 2,632,274 December 31, 2015 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale Debt securities U.S. treasury notes & bonds $ 5,001 $ — $ (1 ) $ 5,000 U.S. government agency debentures 2,500 — (2 ) 2,498 U.S. states and political subdivisions 188,829 4,170 (204 ) 192,795 Residential mortgage-backed securities: U.S. government agencies 900,358 11,325 (5,454 ) 906,229 Commercial mortgage-backed securities: U.S. government agencies 173,912 220 (2,023 ) 172,109 Residential collateralized mortgage-backed securities: U.S. government agencies 2,155,808 2,659 (30,147 ) 2,128,320 Non-agency 4 — — 4 Commercial collateralized mortgage-backed securities: U.S. government agencies 217,008 580 (1,269 ) 216,319 Asset-backed securities: Collateralized loan obligations 297,831 26 (8,446 ) 289,411 Corporate debt securities 61,710 — (9,481 ) 52,229 Total debt securities 4,002,961 18,980 (57,027 ) 3,964,914 Equity securities Marketable equity securities 2,821 — — 2,821 Total equity securities 2,821 — — 2,821 Total securities available-for-sale $ 4,005,782 $ 18,980 $ (57,027 ) $ 3,967,735 Securities held-to-maturity Debt securities U.S. government agency debentures 25,000 19 — 25,019 U.S. states and political subdivisions 571,738 22,180 (262 ) 593,656 Residential mortgage-backed securities: U.S. government agencies 507,908 4,767 (2,999 ) 509,676 Commercial mortgage-backed securities: U.S. government agencies 64,951 294 (574 ) 64,671 Residential collateralized mortgage-backed securities: U.S. government agencies 1,161,340 75 (35,881 ) 1,125,534 Commercial collateralized mortgage-backed securities: U.S. government agencies 255,359 676 (3,611 ) 252,424 Corporate debt securities 87,797 364 (22 ) 88,139 Total securities held-to-maturity $ 2,674,093 $ 28,375 $ (43,349 ) $ 2,659,119 March 31, 2015 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale Debt securities U.S. government agency debentures $ 2,500 $ 13 $ — $ 2,513 U.S. states and political subdivisions 208,800 6,750 (386 ) 215,164 Residential mortgage-backed securities: U.S. government agencies 924,453 24,799 (1,949 ) 947,303 Commercial mortgage-backed securities: U.S. government agencies 139,789 1,231 (661 ) 140,359 Residential collateralized mortgage-backed securities: U.S. government agencies 1,895,112 11,305 (13,857 ) 1,892,560 Non-agency 6 — — 6 Commercial collateralized mortgage-backed securities: U.S. government agencies 241,839 2,602 (382 ) 244,059 Asset-backed securities: Collateralized loan obligations 297,506 587 (4,131 ) 293,962 Corporate debt securities 61,668 — (9,404 ) 52,264 Total debt securities 3,771,673 47,287 (30,770 ) 3,788,190 Equity Securities Marketable equity securities 2,869 — — 2,869 Non-marketable equity securities — — — — Total equity securities 2,869 — — 2,869 Total securities available-for-sale $ 3,774,542 $ 47,287 $ (30,770 ) $ 3,791,059 Securities held-to-maturity Debt securities U.S. treasury notes & bonds $ 5,000 $ — $ — $ 5,000 U.S. government agency debentures 25,000 — (178 ) 24,822 U.S states and political subdivisions 523,501 8,864 (1,147 ) 531,218 Residential mortgage-backed securities: U.S. government agencies 577,278 10,745 (1,677 ) 586,346 Commercial mortgage-backed securities: U.S. government agencies 57,818 765 (108 ) 58,475 Residential collateralized mortgage-backed securities: U.S. government agencies 1,320,215 1,959 (24,846 ) 1,297,328 Commercial collateralized mortgage-backed securities: U.S. government agencies 256,352 1,659 (3,377 ) 254,634 Corporate debt securities 90,010 1,079 — 91,089 Total securities held-to-maturity $ 2,855,174 $ 25,071 $ (31,333 ) $ 2,848,912 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 11 of the 37 U.S. states in which it holds investments. (Dollars in thousands) March 31, 2016 U.S. State # of Issuers Average Issue Size, Fair Value Amortized Cost Fair Value Michigan 137 $ 1,364 $ 180,322 $ 186,935 Ohio 110 1,098 117,643 120,829 Wisconsin 61 615 36,369 37,528 Illinois 53 1,840 95,228 97,511 Texas 53 802 41,356 42,496 Pennsylvania 41 1,035 41,680 42,448 New Jersey 33 736 23,746 24,285 Washington 29 948 26,977 27,497 Minnesota 23 699 15,713 16,069 New York 18 617 10,819 11,104 Missouri 11 1,086 11,637 11,948 Other 107 756 79,847 80,899 Total general obligation bonds 676 $ 1,035 $ 681,337 $ 699,549 (Dollars in thousands) December 31, 2015 U.S. State # of Issuers Average Issue Size, Fair Value Amortized Cost Fair Value Michigan 137 $ 1,381 $ 180,508 $ 189,259 Ohio 111 1,091 116,783 121,117 Illinois 55 1,870 99,524 102,867 Texas 58 807 45,818 46,805 Wisconsin 69 673 44,794 46,454 Pennsylvania 42 1,020 42,185 42,835 Washington 29 950 27,080 27,548 New Jersey 35 725 24,810 25,372 Minnesota 33 667 21,679 22,020 Missouri 15 1,078 15,878 16,174 New York 18 635 11,161 11,422 Other 110 759 81,815 83,477 Total general obligation bonds 712 $ 1,033 $ 712,035 $ 735,350 (Dollars in thousands) March 31, 2015 U.S. State # of Issuers Average Issue Size, Fair Value Amortized Cost Fair Value Michigan 164 $ 857 $ 138,091 $ 140,620 Ohio 136 925 124,908 125,864 Illinois 62 1,841 111,649 114,150 Wisconsin 73 760 53,877 55,497 Texas 63 784 48,388 49,396 Pennsylvania 46 1,018 46,085 46,816 Washington 31 930 28,194 28,836 New Jersey 37 747 26,724 27,623 Minnesota 35 697 23,821 24,405 Missouri 15 1,098 16,032 16,472 New York 19 629 11,646 11,948 Other 121 639 76,127 77,365 Total general obligation bonds 802 $ 896 $ 705,542 $ 718,992 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 March 31, 2016 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 constitutes the majority of other investments on the Consolidated Balance Sheets. (In thousands) March 31, 2016 December 31, 2015 March 31, 2015 FRB stock $ 56,083 $ 56,083 $ 55,681 FHLB stock 91,714 91,714 92,381 Other 362 375 413 Total other investments $ 148,159 $ 148,172 $ 148,475 FRB and FHLB stock is classified as a restricted investment, 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 $3.4 billion , $2.9 billion , and $3.5 billion at March 31, 2016 , December 31, 2015 , and March 31, 2015 , 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 March 31, (In thousands) 2016 2015 Realized gains $ 295 $ 392 Realized losses — (38 ) Net securities (losses)/gains $ 295 $ 354 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. March 31, 2016 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Number Impaired Securities Fair Value Unrealized Losses Number Securities Fair Value Unrealized Losses Securities available-for-sale Debt securities U.S. states and political subdivisions $ 2,880 $ (14 ) 6 $ 1,899 $ (20 ) 4 $ 4,779 $ (34 ) Residential mortgage-backed securities: U.S. government agencies 171 — 2 32,960 (253 ) 3 33,131 (253 ) Commercial mortgage-backed securities: U.S. government agencies — — 0 12,595 (252 ) 1 12,595 (252 ) Residential collateralized mortgage-backed securities: U.S. government agencies 96,691 (568 ) 6 552,785 (7,491 ) 46 649,476 (8,059 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 32,200 (107 ) 5 22,464 (184 ) 2 54,664 (291 ) Asset-backed securities: Collateralized loan obligations 149,999 (6,176 ) 27 121,596 (6,348 ) 15 271,595 (12,524 ) Corporate debt securities — — 0 48,755 (12,968 ) 8 48,755 (12,968 ) Total securities available-for-sale $ 281,941 $ (6,865 ) 46 $ 793,054 $ (27,516 ) 79 $ 1,074,995 $ (34,381 ) Securities held-to-maturity Debt securities U.S. government agency debentures $ — $ — 0 $ — $ — 0 $ — $ — U.S. states and political subdivisions 4,491 (21 ) 9 7,793 (241 ) 10 12,284 (262 ) Residential mortgage-backed securities: U.S. government agencies — — 0 62,997 (212 ) 4 62,997 (212 ) Commercial mortgage-backed securities: U.S. government agencies 13,268 (263 ) 1 9,438 (3 ) 1 22,706 (266 ) Residential collateralized mortgage-backed securities: U.S. government agencies — — 0 873,299 (14,257 ) 52 873,299 (14,257 ) Commercial collateralized mortgage-backed securities: U.S. government agencies — — 0 80,216 (934 ) 7 80,216 (934 ) Total securities held-to-maturity $ 17,759 $ (284 ) 10 $ 1,033,743 $ (15,647 ) 74 $ 1,051,502 $ (15,931 ) December 31, 2015 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Number Securities Fair Value Unrealized Losses Number Impaired Securities Fair Value Unrealized Losses Securities available-for-sale Debt securities U.S government agency debentures $ 2,498 $ (2 ) 1 $ — $ — 0 $ 2,498 $ (2 ) U.S. treasury notes and bonds 5,000 (1 ) 1 — — 0 5,000 (1 ) U.S. states and political subdivisions 10,178 (37 ) 20 5,899 (167 ) 9 16,077 (204 ) Residential mortgage-backed securities: U.S. government agencies 328,156 (3,026 ) 27 95,895 (2,428 ) 7 424,051 (5,454 ) Commercial mortgage-backed securities: U.S. government agencies 107,074 (1,447 ) 15 12,401 (576 ) 1 119,475 (2,023 ) Residential collateralized mortgage-backed securities: U.S. government agencies 1,130,779 (10,587 ) 78 597,403 (19,560 ) 49 1,728,182 (30,147 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 113,825 (893 ) 12 23,400 (376 ) 2 137,225 (1,269 ) Asset-backed securities: Collateralized loan obligations 151,810 (3,576 ) 26 126,422 (4,870 ) 15 278,232 (8,446 ) Corporate debt securities — — 0 52,229 (9,481 ) 8 52,229 (9,481 ) Total securities available-for-sale $ 1,849,320 $ (19,569 ) 180 $ 913,649 $ (37,458 ) 91 $ 2,762,969 $ (57,027 ) Securities held-to-maturity Debt securities U.S. states and political subdivisions $ 18,465 $ (224 ) 21 $ 4,174 $ (38 ) 6 $ 22,639 $ (262 ) Residential mortgage-backed securities: U.S. government agencies 85,738 (715 ) 6 97,880 (2,284 ) 6 183,618 (2,999 ) Commercial mortgage-backed securities: U.S. government agencies 34,833 (346 ) 6 9,269 (228 ) 1 44,102 (574 ) Residential collateralized mortgage-backed securities: U.S. government agencies 140,514 (1,225 ) 12 941,982 (34,656 ) 55 1,082,496 (35,881 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 71,812 (384 ) 7 117,992 (3,227 ) 11 189,804 (3,611 ) Corporate debt securities 19,243 (22 ) 6 — — 0 19,243 (22 ) Total securities held-to-maturity $ 370,605 $ (2,916 ) 58 $ 1,171,297 $ (40,433 ) 79 $ 1,541,902 $ (43,349 ) March 31, 2015 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Number Securities Fair Value Unrealized Losses Number Securities Fair Value Unrealized Losses Securities available-for-sale Debt securities U.S. states and political subdivisions $ 14,380 $ (117 ) 23 $ 6,004 $ (269 ) 10 $ 20,384 $ (386 ) Residential mortgage-backed securities: U.S. government agencies 74,517 (360 ) 5 108,052 (1,589 ) 8 182,569 (1,949 ) Commercial mortgage-backed securities: U.S. government agencies 49,129 (175 ) 7 17,690 (486 ) 2 66,819 (661 ) Residential collateralized mortgage-backed securities: U.S. government agencies 70,574 (762 ) 6 745,621 (13,095 ) 53 816,195 (13,857 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 13,206 (24 ) 2 61,132 (358 ) 6 74,338 (382 ) Asset-backed securities: Collateralized loan obligations 24,087 (209 ) 3 181,498 (3,922 ) 27 205,585 (4,131 ) Corporate debt securities — — 0 52,263 (9,404 ) 8 52,263 (9,404 ) Total securities available-for-sale $ 245,893 $ (1,647 ) 46 $ 1,172,260 $ (29,123 ) 114 $ 1,418,153 $ (30,770 ) Securities held-to-maturity Debt securities U.S. treasury notes & bonds $ 5,000 $ — 1 $ — $ — 0 $ 5,000 $ — U.S. government agency debentures — — 0 24,822 (178 ) 1 24,822 (178 ) U.S. states and political subdivisions 38,202 (1,093 ) 26 4,448 (54 ) 6 42,650 (1,147 ) Residential mortgage-backed securities: U.S. government agencies 28,386 (123 ) 2 110,329 (1,554 ) 6 138,715 (1,677 ) Commercial mortgage-backed securities: U.S. government agencies — — 0 9,554 (108 ) 1 9,554 (108 ) Residential collateralized mortgage-backed securities: U.S. government agencies 19,016 (71 ) 1 1,095,375 (24,775 ) 56 1,114,391 (24,846 ) Commercial collateralized mortgage-backed securities: U.S. government agencies — — 0 144,970 (3,377 ) 13 144,970 (3,377 ) Corporate debt securities — — 0 — — 0 — — Total securities held-to-maturity $ 90,604 $ (1,287 ) 30 $ 1,389,498 $ (30,046 ) 83 $ 1,480,102 $ (31,333 ) 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. 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 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 gain position of $33.9 million at March 31, 2016 , compared to a net unrealized loss position of $53.0 million at December 31, 2015 and a net unrealized gain position of $10.3 million at March 31, 2015 . Gross unrealized losses were $50.3 million as of March 31, 2016 , compared to $100.4 million at December 31, 2015 , and $62.1 million at March 31, 2015 . As of March 31, 2016 , gross unrealized losses are concentrated within agency MBS, CLOs, and corporate debt securities. Securities classified as corporate debt would include eight , single issuer, trust preferred securities with stated maturities. Such investments are only 1% of the fair value of the available-for-sale 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 March 31, 2016 and has recognized the total amount of the impairment in OCI, net of tax. The new Volcker Rule, as originally adopted, may affect the Corporation’s ability to hold CLOs. As of March 31, 2016 , the Corporation holds $285.4 million of CLOs with a gross unrealized loss position of $12.5 million . Management believes that its holdings of CLOs are not ownership interests in covered funds prohibited by the Volcker Rule regulations and, therefore, expects to be able to hold these investments until their stated maturities. Management seeks to maintain a CLO portfolio consistent with the requirements of the Volcker Rule, and new CLO investments are being made in accordance with the strategy. 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 March 31, 2016 . 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. (Dollars in thousands) U.S. Government agency debentures U.S. States and political subdivisions Residential mortgage-backed securities - U.S. govt. agencies Commercial mortgage-backed securities - U.S. govt. agencies Residential collateralized mortgage obligations - U.S. govt. agencies Residential collateralized mortgage obligations - non-agency Commercial collateralized mortgage obligations - U.S. govt. agencies Asset backed securities - collateralized loan obligations Corporate debt securities Total Weighted Average Yield Securities Available-for-Sale Remaining maturity: One year or less $ — $ 7,120 $ 119 $ — $ — $ — $ — $ — $ — $ 7,239 3.29 % Over one year through five years 2,520 79,686 61,444 32,937 16,015 3 15,653 — — 208,258 3.80 % Over five years through ten years — 66,049 52,312 122,070 11,655 — 110,696 204,643 — 567,425 3.06 % Over ten years — 20,286 793,781 29,241 2,199,067 1 146,533 80,754 48,756 3,318,419 2.11 % Fair Value $ 2,520 $ 173,141 $ 907,656 $ 184,248 $ 2,226,737 $ 4 $ 272,882 $ 285,397 $ 48,756 $ 4,101,341 2.33 % Amortized Cost $ 2,500 $ 169,281 $ 889,511 $ 181,846 $ 2,214,035 $ 4 $ 269,197 $ 297,885 $ 61,724 $ 4,085,983 Weighted-Average Yield 1.25 % 5.17 % 2.40 % 2.15 % 2.04 % 2.60 % 2.21 % 3.07 % 1.34 % 2.33 % Weighted-Average Maturity (in years) 2.17 1.96 3.38 4.24 3.44 0.60 4.09 6.51 11.56 3.79 Securities Held-to-Maturity Remaining maturity: One year or less $ — $ 65,484 $ — $ — $ — $ — $ — $ — $ 22,609 $ 88,093 2.21 % Over one year through five years 25,026 157,086 36,437 — — — 81,282 — 65,349 365,180 2.45 % Over five years through ten years — 202,251 52,891 22,567 — — 40,984 — — 318,693 3.83 % Over ten years — 150,997 — 476,596 1,102,058 — 130,657 — — 1,860,308 2.07 % Fair Value $ 25,026 $ 575,818 $ 89,328 $ 499,163 $ 1,102,058 $ — $ 252,923 $ — $ 87,958 $ 2,632,274 2.34 % Amortized Cost $ 25,000 $ 558,795 $ 88,314 $ 489,216 $ 1,113,901 $ — $ 251,421 $ — $ 87,053 $ 2,613,700 Weighted-Average Yield 1.43 % 4.22 % 2.02 % 2.15 % 1.60 % — % 2.00 % — % 2.26 % 2.34 % Weighted-Average Maturity (in years) 0.08 4.61 3.36 3.57 3.45 — 3.85 — 1.77 3.67

Loans

Loans	3 Months Ended
	Mar. 31, 2016
Loans and Leases Receivable Disclosure [Abstract]
Financing Receivables	Loans Loans outstanding as of March 31, 2016 , December 31, 2015 , and March 31, 2015 , net of unearned income, consisted of the following: (In thousands) March 31, 2016 December 31, 2015 March 31, 2015 Originated loans: Commercial $ 9,100,731 $ 9,007,830 $ 8,420,765 Residential mortgage 700,138 689,045 639,980 Installment 3,154,912 2,990,349 2,500,288 Home equity 1,254,709 1,248,438 1,134,238 Credit cards 179,023 182,843 160,766 Total originated loans 14,389,513 14,118,505 12,856,037 Allowance for originated loan losses (102,915 ) (105,135 ) (97,545 ) Net originated loans $ 14,286,598 $ 14,013,370 $ 12,758,492 Acquired loans: Commercial $ 628,030 $ 677,149 $ 1,011,170 Residential mortgage 308,618 324,008 378,192 Installment 539,313 573,372 717,693 Home equity 157,745 168,542 217,824 Total acquired loans 1,633,706 1,743,071 2,324,879 Allowance for acquired loan losses (4,423 ) (3,877 ) (7,493 ) Net acquired loans $ 1,629,283 $ 1,739,194 $ 2,317,386 FDIC acquired loans: Commercial $ 122,123 $ 129,109 $ 179,547 Residential mortgage 34,594 35,568 40,470 Installment 1,942 2,077 4,781 Home equity 34,136 38,668 65,170 Loss share receivable 9,436 9,947 20,005 Total FDIC acquired loans 202,231 215,369 309,973 Allowance for FDIC acquired loan losses (44,599 ) (44,679 ) (41,514 ) Net FDIC acquired loans $ 157,632 $ 170,690 $ 268,459 Total loans: Commercial $ 9,850,884 $ 9,814,088 $ 9,611,482 Residential mortgage 1,043,350 1,048,621 1,058,642 Installment 3,696,167 3,565,798 3,222,762 Home equity 1,446,590 1,455,648 1,417,232 Credit cards 179,023 182,843 160,766 Loss share receivable 9,436 9,947 20,005 Total loans 16,225,450 16,076,945 15,490,889 Total allowance for loan losses (151,937 ) (153,691 ) (146,552 ) Total Net loans $ 16,073,513 $ 15,923,254 $ 15,344,337 The following describes the distinction between originated, acquired and FDIC acquired 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 $4.9 million , $4.1 million , and $4.6 million at March 31, 2016 , December 31, 2015 , and March 31, 2015 , 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 as of the Acquisition Date between those considered to be performing (acquired nonimpaired 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 March 31, 2016 and 2015 were $370.6 million and $548.2 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 months ended March 31, 2016 and 2015 : Three Months Ended March 31, Acquired Impaired Loans 2016 2015 (In thousands) Accretable Yield Carrying Amount of Loans Accretable Yield Carrying Amount of Loans Balance at beginning of period $ 89,823 $ 284,709 $ 119,450 $ 423,209 Accretion (8,902 ) 8,902 (11,218 ) 11,218 Net reclassifications from nonaccretable to accretable 7,753 — 12,995 — Payments received, net — (36,459 ) — (46,114 ) Disposals (3,230 ) — (2,471 ) — Balance at end of period $ 85,444 $ 257,152 $ 118,756 $ 388,313 Cash flows expected to be collected on acquired impaired loans are estimated quarterly by incorporating several key assumptions similar to the initial estimate of fair value. These key assumptions include probability of default, and the amount of actual prepayments after the acquisition date. Prepayments affect the estimated life of the loans and could change the amount of interest income, and possibly principal expected to be collected. In reforecasting future estimated cash flows, credit loss expectations are adjusted as necessary. Improved cash flow expectations for loans or pools that were impaired in prior periods are recorded first as a reversal of previously recorded impairment and then as an increase in prospective yield when all previously recorded impairment has been recaptured. Decreases in expected cash flows are recognized as an impairment through a provision for loan loss and an increase to the allowance for acquired impaired loans. During the quarter ended March 31, 2016 , there was an overall improvement in cash flow expectations, which resulted in the net reclassification of $7.8 million from the nonaccretable difference to accretable yield. This reclassification was $13.0 million for the three months ended March 31, 2015 . The reclassification from the nonaccretable difference to the accretable yield results in prospective yield adjustments on the loan pools. FDIC Acquired Loans and Related Loss Share Receivable FDIC acquired loans include loans purchased in the 2010 FDIC-assisted acquisitions of George Washington and Midwest. George Washington and Midwest non-single family loss share agreements with the FDIC expired at March 31, 2015 and June 30, 2015 , respectively, resulting in $122.1 million of loans no longer being covered as of March 31, 2016 . As of March 31, 2016 , $70.7 million remained covered by single family loss share agreements. Changes in the loss share receivable for the three months ended March 31, 2016 and 2015 were as follows: Loss Share Receivable Three Months Ended March 31, (In thousands) 2016 2015 Balance at beginning of period $ 9,947 $ 22,033 Amortization (348 ) (2,187 ) Increase/(decrease) due to impairment (recapture) on FDIC acquired loans 269 4,227 FDIC reimbursement (192 ) (4,013 ) FDIC acquired loans paid in full (240 ) (55 ) Balance at end of the period (1) $ 9,436 $ 20,005 (1) As of March 31, 2016 , the loss share receivable of $9.4 million was related to single family covered loans. Total outstanding FDIC acquired impaired loans were $306.6 million and $404.4 million as of March 31, 2016 and 2015 , 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 FDIC acquired impaired loans were as follows for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, FDIC Acquired Impaired Loans 2016 2015 (In thousands) Accretable Yield Carrying Loans Accretable Yield Carrying Loans Balance at beginning of period $ 22,908 $ 130,648 $ 37,511 $ 232,452 Accretion (2,297 ) 2,297 (5,567 ) 5,567 Net reclassifications between non-accretable and accretable 1,673 — (56 ) — Payments received, net — (10,811 ) — (38,794 ) (Disposals)/Additions (158 ) — (2,021 ) — Balance at end of period $ 22,126 $ 122,134 $ 29,867 $ 199,225 The cash flows expected to be collected on covered impaired loans are estimated quarterly in a similar manner as described above for acquired impaired loans. During the quarter ended March 31, 2016 , the re-estimation process resulted in a net reclassification of $1.7 million from the nonaccretable difference to accretable yield. This reclassification was $0.1 million for the three months ended March 31, 2015 . The reclassification from the nonaccretable difference to the accretable yield results in prospective yield adjustments on the loan pools. 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 FDIC acquired 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 March 31, 2016 (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 (1) Loans Commercial C&I $ 2,485 $ 3,464 $ 8,627 $ 14,576 $ 5,822,739 $ 5,837,315 $ 274 $ 35,500 CRE 3,211 1,137 17,024 21,372 2,058,290 2,079,662 2,420 18,216 Construction 6,891 — 485 7,376 663,449 670,825 — 3,010 Leases — — — — 512,929 512,929 — — Consumer Installment 13,150 2,591 3,567 19,308 3,135,604 3,154,912 3,178 2,554 Home Equity Lines 1,100 897 1,757 3,754 1,250,955 1,254,709 274 2,267 Credit Cards 857 483 843 2,183 176,840 179,023 339 554 Residential Mortgages 11,278 1,544 6,801 19,623 680,515 700,138 2,876 11,600 Total $ 38,972 $ 10,116 $ 39,104 $ 88,192 $ 14,301,321 $ 14,389,513 $ 9,361 $ 73,701 Acquired Loans ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ 1,092 $ 75 $ 1,729 $ 2,896 $ 227,804 $ 230,700 $ 145 $ 766 CRE 2,580 918 10,561 14,059 377,804 391,863 — 4,332 Construction — — 718 718 4,749 5,467 — — Consumer Installment 3,869 793 633 5,295 534,018 539,313 289 600 Home Equity Lines 1,002 120 470 1,592 156,153 157,745 260 320 Residential Mortgages 9,244 49 4,515 13,808 294,810 308,618 1,018 980 Total $ 17,787 $ 1,955 $ 18,626 $ 38,368 $ 1,595,338 $ 1,633,706 $ 1,712 $ 6,998 FDIC Acquired Loans (2) ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ — $ — $ 949 $ 949 $ 30,981 $ 31,930 n/a n/a CRE 288 344 27,699 28,331 56,973 85,304 n/a n/a Construction — — 3,133 3,133 1,756 4,889 n/a n/a Consumer Installment — — — — 1,942 1,942 n/a n/a Home Equity Lines 1,969 46 1,693 3,708 30,428 34,136 n/a n/a Residential Mortgages 4,490 167 2,582 7,239 27,355 34,594 n/a n/a Total $ 6,747 $ 557 $ 36,056 $ 43,360 $ 149,435 $ 192,795 n/a n/a (1) Installment loans 90 days or more past due and accruing include $2.3 million of loans guaranteed by the U.S. government as of March 31, 2016 . (2) Excludes loss share receivable of $9.4 million as of March 31, 2016 . (3) Acquired and FDIC acquired impaired loans were not classified as nonperforming assets at March 31, 2016 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 FDIC acquired impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and FDIC acquired impaired loans. As of December 31, 2015 (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 (1) Loans Commercial C&I $ 4,684 $ 115 $ 8,824 $ 13,623 $ 5,779,785 $ 5,793,408 $ 236 $ 23,123 CRE 12,880 — 2,260 15,140 2,062,204 2,077,344 153 4,503 Construction 1,360 — 486 1,846 643,491 645,337 — 482 Leases — — — — 491,741 491,741 — — Consumer Installment 17,934 4,828 3,920 26,682 2,963,667 2,990,349 3,519 2,178 Home Equity Lines 1,952 913 1,478 4,343 1,244,095 1,248,438 513 1,674 Credit Cards 1,449 494 632 2,575 180,268 182,843 725 545 Residential Mortgages 11,099 1,519 6,693 19,311 669,734 689,045 2,876 11,600 Total $ 51,358 $ 7,869 $ 24,293 $ 83,520 $ 14,034,985 $ 14,118,505 $ 8,022 $ 44,105 Acquired Loans ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ 311 $ 31 $ 3,336 $ 3,678 $ 236,467 $ 240,145 $ 13 $ 782 CRE 3,192 1,681 9,657 14,530 416,361 430,891 522 4,948 Construction — — 733 733 5,380 6,113 — — Consumer Installment 5,059 1,329 974 7,362 566,010 573,372 236 835 Home Equity Lines 1,365 660 1,260 3,285 165,257 168,542 644 514 Residential Mortgages 8,760 567 6,792 16,119 307,889 324,008 1,681 1,166 Total $ 18,687 $ 4,268 $ 22,752 $ 45,707 $ 1,697,364 $ 1,743,071 $ 3,096 $ 8,245 FDIC Acquired Loans (2) ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ — $ — $ 1,054 $ 1,054 $ 34,412 $ 35,466 n/a n/a CRE 296 354 28,501 29,151 58,623 87,774 n/a n/a Construction — — 3,761 3,761 2,108 5,869 n/a n/a Consumer Installment — — — — 2,077 2,077 n/a n/a Home Equity Lines 2,230 52 1,917 4,199 34,469 38,668 n/a n/a Residential Mortgages 4,616 172 2,655 7,443 28,125 35,568 n/a n/a Total $ 7,142 $ 578 $ 37,888 $ 45,608 $ 159,814 $ 205,422 n/a n/a (1) Installment loans 90 days or more past due and accruing include $2.3 million of loans guaranteed by the U.S. government as of December 31, 2015 . (2) Excludes loss share receivable of $9.9 million as of December 31, 2015 . (3) Acquired and FDIC acquired impaired loans were not classified as nonperforming assets at December 31, 2015 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 FDIC acquired impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and FDIC acquired impaired loans. As of March 31, 2015 (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 (1) Loans Commercial C&I $ 525 $ 515 $ 5,846 $ 6,886 $ 5,311,011 $ 5,317,897 $ 498 $ 18,838 CRE 4,401 1,177 3,481 9,059 2,123,958 2,133,017 150 9,640 Construction — — — — 580,978 580,978 — — Leases 255 — — 255 388,618 388,873 — — Consumer Installment 11,294 3,215 4,157 18,666 2,481,622 2,500,288 3,332 3,016 Home Equity Lines 1,480 323 1,395 3,198 1,131,040 1,134,238 622 1,780 Credit Cards 654 301 637 1,592 159,174 160,766 312 523 Residential Mortgages 9,236 2,515 7,402 19,153 620,827 639,980 3,000 12,288 Total $ 27,845 $ 8,046 $ 22,918 $ 58,809 $ 12,797,228 $ 12,856,037 $ 7,914 $ 46,085 Acquired Loans ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ 66 $ 131 $ 5,366 $ 5,563 $ 415,247 $ 420,810 $ 44 $ 700 CRE 4,507 1,380 23,420 29,307 554,765 584,072 252 4,172 Construction — — 676 676 5,612 6,288 — — Consumer Installment 4,859 1,322 1,121 7,302 710,391 717,693 521 746 Home Equity Lines 2,850 1,544 1,172 5,566 212,258 217,824 462 639 Residential Mortgages 9,894 590 5,250 15,734 362,458 378,192 425 997 Total $ 22,176 $ 4,967 $ 37,005 $ 64,148 $ 2,260,731 $ 2,324,879 $ 1,704 $ 7,254 FDIC Acquired Loans (2) ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ 815 $ 144 $ 4,566 $ 5,525 $ 37,289 $ 42,814 n/a n/a CRE 413 5,218 44,023 49,654 78,254 127,908 n/a n/a Construction — — 6,906 6,906 1,919 8,825 n/a n/a Consumer Installment — 110 — 110 4,671 4,781 n/a n/a Home Equity Lines 2,291 564 3,651 6,506 58,664 65,170 n/a n/a Residential Mortgages 5,714 163 3,684 9,561 30,909 40,470 n/a n/a Total $ 9,233 $ 6,199 $ 62,830 $ 78,262 $ 211,706 $ 289,968 n/a n/a (1) Installment loans 90 days or more past due and accruing include $2.4 million of loans guaranteed by the U.S. government as of March 31, 2015 . (2) Excludes loss share receivable of $20.0 million as of March 31, 2015 . (3) Acquired and FDIC acquired impaired loans were not classified as nonperforming assets at March 31, 2015 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 FDIC acquired impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and FDIC acquired 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 about 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. The following tables provide a summary of commercial loans by portfolio type and the Corporation's internal credit quality rating: As of March 31, 2016 (In thousands) Originated Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 68,185 $ 757 $ — $ 12,613 $ 81,555 Grade 2 397,855 818 — 43,507 442,180 Grade 3 1,317,058 310,816 52,039 80,042 1,759,955 Grade 4 3,762,793 1,719,833 597,571 336,402 6,416,599 Grade 5 141,456 9,924 2,401 32,416 186,197 Grade 6 146,380 37,514 18,814 7,949 210,657 Grade 7 3,588 — — — 3,588 Total $ 5,837,315 $ 2,079,662 $ 670,825 $ 512,929 $ 9,100,731 Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ — $ — $ — $ — $ — Grade 2 596 615 — — 1,211 Grade 3 27,818 23,221 — — 51,039 Grade 4 169,906 327,406 4,749 — 502,061 Grade 5 24,577 11,663 — — 36,240 Grade 6 7,803 28,958 718 — 37,479 Grade 7 — — — — — Total $ 230,700 $ 391,863 $ 5,467 $ — $ 628,030 FDIC Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ — $ — $ — $ — $ — Grade 2 965 — — — 965 Grade 3 — 6,807 — — 6,807 Grade 4 28,483 48,512 682 — 77,677 Grade 5 266 — — — 266 Grade 6 2,216 29,985 4,207 — 36,408 Grade 7 — — — — — Total $ 31,930 $ 85,304 $ 4,889 $ — $ 122,123 As of December 31, 2015 (In thousands) Originated Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 60,440 $ 773 $ — $ 12,732 $ 73,945 Grade 2 353,581 831 — 69,258 423,670 Grade 3 1,371,850 319,987 59,182 49,956 1,800,975 Grade 4 3,756,333 1,697,261 569,098 344,763 6,367,455 Grade 5 124,140 18,388 7,193 7,858 157,579 Grade 6 124,483 40,105 9,864 7,174 181,626 Grade 7 2,581 (1 ) — — 2,580 Total $ 5,793,408 $ 2,077,344 $ 645,337 $ 491,741 $ 9,007,830 Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 346 $ — $ — $ — $ 346 Grade 2 — — — — — Grade 3 15,548 27,387 — — 42,935 Grade 4 200,736 361,518 5,380 — 567,634 Grade 5 11,735 12,546 — — 24,281 Grade 6 11,780 29,440 733 — 41,953 Grade 7 — — — — — Total $ 240,145 $ 430,891 $ 6,113 $ — $ 677,149 FDIC Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ — $ — $ — $ — $ — Grade 2 1,072 — — — 1,072 Grade 3 — 7,004 — — 7,004 Grade 4 31,637 49,917 819 — 82,373 Grade 5 295 — — — 295 Grade 6 2,462 30,853 5,050 — 38,365 Grade 7 — — — — — Total $ 35,466 $ 87,774 $ 5,869 $ — $ 129,109 As of March 31, 2015 (In thousands) Originated Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 59,380 $ 667 $ — $ 13,052 $ 73,099 Grade 2 191,008 3,368 — 5,782 200,158 Grade 3 1,405,007 339,027 62,821 69,686 1,876,541 Grade 4 3,504,600 1,724,516 516,852 297,790 6,043,758 Grade 5 103,432 29,034 942 1,307 134,715 Grade 6 54,470 36,405 363 1,256 92,494 Grade 7 — — — — — Total $ 5,317,897 $ 2,133,017 $ 580,978 $ 388,873 $ 8,420,765 Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 1,069 $ — $ — $ — $ 1,069 Grade 2 — — — — — Grade 3 22,875 24,834 — — 47,709 Grade 4 359,751 496,213 5,612 — 861,576 Grade 5 15,363 21,487 — — 36,850 Grade 6 21,752 41,538 676 — 63,966 Grade 7 — — — — — Total $ 420,810 $ 584,072 $ 6,288 $ — $ 1,011,170 FDIC Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ — $ — $ — $ — $ — Grade 2 1,040 — — — 1,040 Grade 3 — — — — — Grade 4 33,352 74,128 579 — 108,059 Grade 5 39 2,134 — — 2,173 Grade 6 8,383 51,646 8,246 — 68,275 Grade 7 — — — — — Total $ 42,814 $ 127,908 $ 8,825 $ — $ 179,547

Allowance for Loan Losses Allow

Allowance for Loan Losses Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2016
Loans and Leases Receivable Disclosure [Abstract]
Allowance for Loan 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 FDIC acquired 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. The following tables show activity in the originated ALL, by portfolio segment for the three months ended March 31, 2016 and 2015 , as well as the corresponding recorded investment in originated loans at the end of the period: As of March 31, 2016 (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 $ 44,760 $ 9,631 $ 1,594 $ 1,313 $ 14,183 $ 20,094 $ 8,831 $ 4,729 $ 105,135 Charge-offs (3,209 ) (109 ) — — (6,769 ) (1,027 ) (1,450 ) (450 ) (13,014 ) Recoveries 532 24 2 19 3,806 624 357 20 5,384 Provision for loan losses 2,406 (2,302 ) (59 ) 167 3,444 (163 ) 853 1,064 5,410 Allowance for originated loan losses, ending balance $ 44,489 $ 7,244 $ 1,537 $ 1,499 $ 14,664 $ 19,528 $ 8,591 $ 5,363 $ 102,915 Ending allowance for originated loan losses balance attributable to loans: Individually evaluated for impairment $ 6,194 $ 567 $ — $ — $ 1,081 $ 185 $ 225 $ 1,038 $ 9,290 Collectively evaluated for impairment 38,295 6,677 1,537 1,499 13,583 19,343 8,366 4,325 93,625 Total ending allowance for originated loan losses balance $ 44,489 $ 7,244 $ 1,537 $ 1,499 $ 14,664 $ 19,528 $ 8,591 $ 5,363 $ 102,915 Originated loans: Originated loans individually evaluated for impairment $ 46,996 $ 24,013 $ — $ — $ 40,134 $ 7,720 $ 687 $ 23,105 $ 142,655 Originated loans collectively evaluated for impairment 5,790,319 2,055,649 670,825 512,929 3,114,778 1,246,989 178,336 677,033 14,246,858 Total ending originated loan balance $ 5,837,315 $ 2,079,662 $ 670,825 $ 512,929 $ 3,154,912 $ 1,254,709 $ 179,023 $ 700,138 $ 14,389,513 As of March 31, 2015 (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 $ 37,375 $ 10,492 $ 2,202 $ 674 $ 12,918 $ 19,324 $ 7,966 $ 4,745 $ 95,696 Charge-offs (510 ) (215 ) — — (5,055 ) (911 ) (1,452 ) (424 ) (8,567 ) Recoveries 341 — 1 4 3,020 613 366 35 4,380 Provision for loan losses 2,632 (1,464 ) (451 ) (49 ) 2,475 407 921 1,565 6,036 Allowance for originated loan losses, ending balance $ 39,838 $ 8,813 $ 1,752 $ 629 $ 13,358 $ 19,433 $ 7,801 $ 5,921 $ 97,545 Ending allowance for originated loan losses balance attributable to loans: Individually evaluated for impairment $ 10,042 $ 317 $ — $ — $ 1,005 $ 254 $ 263 $ 1,416 $ 13,297 Collectively evaluated for impairment 29,796 8,496 1,752 629 12,353 19,179 7,538 4,505 84,248 Total ending allowance for originated loan losses balance $ 39,838 $ 8,813 $ 1,752 $ 629 $ 13,358 $ 19,433 $ 7,801 $ 5,921 $ 97,545 Originated loans: Originated loans individually evaluated for impairment $ 35,792 $ 15,000 $ — $ — $ 26,882 $ 7,632 $ 815 $ 24,822 $ 110,943 Originated loans collectively evaluated for impairment 5,282,105 2,118,017 580,978 388,873 2,473,406 1,126,606 159,951 615,158 12,745,094 Total ending originated loan balance $ 5,317,897 $ 2,133,017 $ 580,978 $ 388,873 $ 2,500,288 $ 1,134,238 $ 160,766 $ 639,980 $ 12,856,037 The following table presents the originated ALL and the recorded investment as of December 31, 2015 : As of December 31, 2015 (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 $ 11,837 $ 128 $ — $ — $ 1,009 $ 188 $ 243 $ 944 $ 14,349 Collectively evaluated for impairment 32,923 9,503 1,594 1,313 13,174 19,906 8,588 3,785 90,786 Total ending allowance for originated loan losses balance $ 44,760 $ 9,631 $ 1,594 $ 1,313 $ 14,183 $ 20,094 $ 8,831 $ 4,729 $ 105,135 Originated loans: Loans individually evaluated for impairment $ 43,818 $ 16,614 $ — $ — $ 36,904 $ 7,080 $ 717 $ 23,905 $ 129,038 Loans collectively evaluated for impairment 5,749,590 2,060,730 645,337 491,741 2,953,445 1,241,358 182,126 665,140 13,989,467 Total ending originated loan balance $ 5,793,408 $ 2,077,344 $ 645,337 $ 491,741 $ 2,990,349 $ 1,248,438 $ 182,843 $ 689,045 $ 14,118,505 Allowance for Acquired Loan Losses 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. The allowance determined for each acquired nonimpaired loan is compared to the remaining fair value adjustment for that loan. If the computed allowance is greater, the excess is added to the allowance through a provision for loan losses. If the computed allowance is less, no additional allowance is recognized. As of March 31, 2016 , 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 months ended March 31, 2016 and 2015 , provision for loan losses, equal to net charge-offs, of $0.6 million and $2.2 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 by an increase in the 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 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 months ended March 31, 2016 and 2015 : Allowance for Acquired Impaired Loan Losses Three Months Ended March 31, (In thousands) 2016 2015 Balance at beginning of the period $ 3,877 $ 7,457 Charge-offs — — Recoveries — — Provision/(recapture) for loan losses 546 36 Balance at end of the period $ 4,423 $ 7,493 Allowance for FDIC Acquired Loan Losses The ALL on FDIC acquired nonimpaired 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 share agreements with the FDIC. As of March 31, 2016 , the computed ALL was less than the remaining fair value discount; therefore, no ALL for FDIC acquired nonimpaired loans was recorded . The following table presents activity in the allowance for FDIC acquired impaired loan losses for the three months ended March 31, 2016 and 2015 : Allowance for FDIC acquired Impaired Loan Losses Three Months Ended March 31, (In thousands) 2016 2015 Balance at beginning of the period $ 44,679 $ 40,496 Net provision/(recapture) of loan losses before benefit attributable to FDIC loss share agreements 1,537 4,225 Net (benefit)/recapture attributable to FDIC loss share agreements (269 ) (4,227 ) Net provision/(recapture) for loan losses 1,268 (2 ) Increase/(decrease) in loss share receivable 269 4,227 Loans charged-off (1,617 ) (3,207 ) Balance at end of the period $ 44,599 $ 41,514 An acquired or FDIC acquired 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 FDIC acquired 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 for the three months ended March 31, 2016 , compared to $118.0 thousand for the three months ended March 31, 2015 . Interest income which would have been earned in accordance with the original terms was $1.2 million for the three months ended March 31, 2016 , compared to $0.9 million for the three months ended March 31, 2015 . 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 FDIC acquired 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 Troubled Debt Restructurings section 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 March 31, 2016 Originated Loans Unpaid Average Recorded Principal Related Recorded (In thousands) Investment Balance Allowance Investment Impaired loans with no related allowance Commercial C&I $ 32,520 $ 38,568 $ — $ 30,827 CRE 20,598 22,604 — 13,776 Construction — — — — Leases — — — — Consumer Installment 1,236 1,493 — 1,162 Home equity line 481 738 — 751 Credit card 13 13 — 20 Residential mortgages 11,184 13,562 — 11,775 Subtotal 66,032 76,978 — 58,311 Impaired loans with a related allowance Commercial C&I 14,476 14,617 6,194 14,117 CRE 3,415 3,447 567 2,435 Construction — — — — Leases — — — — Consumer Installment 38,898 39,013 1,081 32,499 Home equity line 7,239 7,239 185 6,699 Credit card 674 674 225 725 Residential mortgages 11,921 12,036 1,038 12,394 Subtotal 76,623 77,026 9,290 68,869 Total impaired loans $ 142,655 $ 154,004 $ 9,290 $ 127,180 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, 2015 Originated Loans Unpaid Average Recorded Principal Related Recorded (In thousands) Investment Balance Allowance Investment Impaired loans with no related allowance Commercial C&I $ 21,066 $ 23,854 $ — $ 27,215 CRE 15,465 17,456 — 13,031 Construction — — — — Consumer Installment 1,369 1,658 — 1,807 Home equity line 670 919 — 999 Credit card 21 21 — 20 Residential mortgages 11,550 13,901 — 11,979 Subtotal 50,141 57,809 — 55,051 Impaired loans with a related allowance Commercial C&I 22,752 28,881 11,837 11,284 CRE 1,149 1,173 128 3,037 Construction — — — — Consumer Installment 35,535 35,592 1,009 28,808 Home equity line 6,410 6,411 188 6,382 Credit card 696 696 243 757 Residential mortgages 12,355 12,458 944 12,619 Subtotal 78,897 85,211 14,349 62,887 Total impaired loans $ 129,038 $ 143,020 $ 14,349 $ 117,938 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 March 31, 2015 Originated Loans Unpaid Average Recorded Principal Related Recorded (In thousands) Investment Balance Allowance Investment Impaired loans with no related allowance Commercial C&I $ 28,513 $ 35,307 $ — $ 25,006 CRE 9,343 15,478 — 9,634 Construction — — — — Consumer Installment 1,846 2,428 — 1,881 Home equity line 977 1,222 — 987 Credit card 21 21 — 23 Residential mortgages 12,424 15,125 — 12,488 Subtotal 53,124 69,581 — 50,019 Impaired loans with a related allowance Commercial C&I 7,279 7,350 10,042 5,984 CRE 5,657 5,664 317 5,668 Construction — — — — Consumer Installment 25,036 25,100 1,005 24,181 Home equity line 6,655 6,655 254 6,715 Credit card 794 794 263 823 Residential mortgages 12,398 12,487 1,416 12,414 Subtotal 57,819 58,050 13,297 55,785 Total impaired loans $ 110,943 $ 127,631 $ 13,297 $ 105,804 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 March 31, 2016 , December 31, 2015 , and March 31, 2015 . As of March 31, 2016 (Dollars in thousands) Number of Loans Recorded Investment Unpaid Principal Balance Originated loans Commercial C&I 27 $ 28,160 $ 28,980 CRE 22 14,175 16,141 Construction — — — Total originated commercial 49 42,335 45,121 Consumer Installment 1,224 40,134 40,506 Home equity lines 253 7,720 7,977 Credit card 201 687 687 Residential mortgages 307 23,105 25,598 Total originated consumer 1,985 71,646 74,768 Total originated loans 2,034 $ 113,981 $ 119,889 Acquired loans Commercial C&I — $ — $ — CRE 5 3,525 3,827 Construction — — — Total acquired commercial 5 3,525 3,827 Consumer Installment 50 1,317 1,384 Home equity lines 171 7,508 7,572 Residential mortgages 31 2,050 2,277 Total acquired consumer 252 10,875 11,233 Total acquired loans 257 $ 14,400 $ 15,060 FDIC acquired loans Commercial C&I — $ — $ — CRE 3 13,176 11,466 Construction 1 580 677 Total FDIC acquired commercial 4 13,756 12,143 Consumer Home equity lines 76 9,627 9,642 Residential mortgages — — — Total FDIC acquired consumer 76 9,627 9,642 Total FDIC acquired loans 80 $ 23,383 $ 21,785 Total loans Commercial C&I 27 $ 28,160 $ 28,980 CRE 30 30,876 31,434 Construction 1 580 677 Total commercial 58 59,616 61,091 Consumer Installment 1,274 41,451 41,890 Home equity lines 500 24,855 25,191 Credit card 201 687 687 Residential mortgages 338 25,155 27,875 Total consumer 2,313 92,148 95,643 Total loans 2,371 $ 151,764 $ 156,734 Note 1: For originated loans, the differences between the recorded investment and unpaid principal balance amounts represent partial charge offs. Note 2: For acquired and FDIC acquired loans, the differences between the recorded investment and unpaid principal balance amounts represent partial charge offs and remaining purchase discount. As of December 31, 2015 (Dollars in thousands) Number of Loans Recorded Investment Unpaid Principal Balance Originated loans Commercial C&I 26 $ 33,087 $ 33,740 CRE 24 14,671 16,648 Construction — — — Total originated commercial 50 47,758 50,388 Consumer Installment 1,223 36,904 37,250 Home equity lines 257 7,080 7,330 Credit card 212 717 717 Residential mortgages 312 23,905 26,359 Total originated consumer 2,004 68,606 71,656 Total originated loans 2,054 $ 116,364 $ 122,044 Acquired loans Commercial C&I 1 7,611 7,611 CRE 3 918 1,044 Total acquired commercial 4 8,529 8,655 Consumer Installment 51 1,117 1,211 Home equity lines 176 7,718 7,778 Residential mortgages 31 2,154 2,382 Total acquired consumer 258 10,989 11,371 Total acquired loans 262 $ 19,518 $ 20,026 FDIC acquired loans Commercial C&I — $ — $ — CRE 3 14,056 12,479 Construction 1 593 682 Total FDIC acquired commercial 4 14,649 13,161 Consumer Home equity lines 81 10,215 10,281 Residential Mortgages 1 182 182 Total FDIC acquired consumer 82 10,397 10,463 Total FDIC acquired loans 86 $ 25,046 $ 23,624 Total loans Commercial C&I 27 $ 40,698 $ 41,351 CRE 30 29,645 30,171 Construction 1 593 682 Total commercial 58 70,936 72,204 Consumer Installment 1,274 38,021 38,461 Home equity lines 514 25,013 25,389 Credit card 212 717 717 Residential mortgages 344 26,241 28,923 Total consumer 2,344 89,992 93,490 Total loans 2,402 $ 160,928 $ 165,694 Note 1: For originated loans, the differences between the recorded investment and unpaid principal balance amounts represent partial charge offs. Note 2: For acquired and FDIC acquired loans, the differences between the recorded investment and unpaid principal balance amounts represent partial charge offs and remaining purchase discount. As of March 31, 2015 (Dollars in thousands) Number of Loans Recorded Investment Unpaid Principal Balance Originated loans Commercial C&I 47 $ 16,923 $ 23,666 CRE 64 12,076 17,325 Construction 31 — — Total originated commercial 142 28,999 40,991 Consumer Installment 1,186 26,882 27,528 Home equity lines 276 7,632 7,877 Credit card 230 815 815 Residential mortgages 316 24,822 27,612 Total originated consumer 2,008 60,151 63,832 Total originated loans 2,150 $ 89,150 $ 104,823 Acquired loans Commercial C&I 1 2 3 CRE 3 2,453 2,635 Total acquired commercial 4 2,455 2,638 Consumer Installment 51 1,195 1,281 Home equity lines 162 7,310 7,370 Residential mortgages 30 2,186 2,403 Total acquired consumer 243 10,691 11,054 Total acquired loans 247 $ 13,146 $ 13,692 FDIC acquired loans Commercial C&I 8 $ — $ 1,355 CRE 24 23,895 39,596 Construction 9 346 9,552 Total FDIC acquired commercial 41 24,241 50,503 Consumer Home equity lines 70 8,909 8,914 Residential mortgages 1 185 185 Total FDIC acquired consumer 71 9,094 9,099 Total FDIC acquired loans 112 $ 33,335 $ 59,602 Total loans Commercial C&I 56 $ 16,925 $ 25,024 CRE 91 38,424 59,556 Construction 40 346 9,552 Total commercial 187 55,695 94,132 Consumer Installment 1,237 28,077 28,809 Home equity lines 508 23,851 24,161 Credit card 230 815 815 Residential mortgages 347 27,193 30,200 Total consumer 2,322 79,936 83,985 Total loans 2,509 $ 135,631 $ 178,117 Note 1: For originated loans, the differences between the recorded investment and unpaid principal balance amounts represent partial charge offs. Note 2: For acquired and FDIC acquired loans, the differences between the recorded investment and unpaid principal balance amounts represent partial charge offs and remaining purchase discount. The pre-modification and post-modification outstanding recorded investments of loans modified as TDRs during the three months ended March 31, 2016 and 2015 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 months ended March 31, 2016 and 2015 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 months ended March 31, 2016 and 2015 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 March 31, 2016 , December 31, 2015 , and March 31, 2015 , the Corporation had $8.3 million , $7.0 million , and $6.1 million , respectively, 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 March 31, 2016 , December 31, 2015 , and March 31, 2015 , including TDRs that continue to accrue interest and TDRs included in nonperforming assets. As of March 31, 2016 Accruing TDRs Nonaccruing TDRs Total Total (In thousands) Current Delinquent Total Current Delinquent Total TDRs Allowance Originated loans Commercial C&I $ 13,306 $ 1,168 $ 14,474 $ 7,741 $ 5,945 $ 13,686 $ 28,160 $ 6,194 CRE 273 2,247 2,520 765 10,890 11,655 14,175 20 Construction — — — — — — — — Total originated commercial 13,579 3,415 16,994 8,506 16,835 25,341 42,335 6,214 Consumer Installment 38,153 600 38,753 1,342 39 1,381 40,134 1,081 Home equity lines 6,891 101 6,992 713 15 728 7,720 185 Credit card 554 111 665 — 22 22 687 225 Residential mortgages 13,707 1,517 15,224 5,395 2,486 7,881 23,105 1,038 Total originated consumer 59,305 2,329 61,634 7,450 2,562 10,012 71,646 2,529 Total originated TDRs $ 72,884 $ 5,744 $ 78,628 $ 15,956 $ 19,397 $ 35,353 $ 113,981 $ 8,743 Acquired loans Commercial C&I $ — $ — $ — $ — $ — $ — $ — $ — CRE 2,758 — 2,758 665 102 767 3,525 29 Construction — — — — — — — — Total acquired commercial 2,758 — 2,758 665 102 767 3,525 29 Consumer Installment 1,230 — 1,230 87 — 87 1,317 42 Home equity lines 7,281 108 7,389 119 — 119 7,508 59 Residential mortgages 1,156 247 1,403 623 24 647 2,050 — Total acquired consumer 9,667 355 10,022 829 24 853 10,875 101 Total acquired TDRs $ 12,425 $ 355 $ 12,780 $ 1,494 $ 126 $ 1,620 $ 14,400 $ 130 FDIC acquired loans Commercial C&I $ — $ — $ — $ — $ — $ — $ — $ — CRE — — — — 13,176 13,176 13,176 2,302 Construction — — — 580 — 580 580 42 Total FDIC acquired commercial — — — 580 13,176 13,756 13,756 2,344 Consumer Home equity lines 9,395 181 9,576 51 — 51 9,627 26 Residential mortgages — — — — — — — — Total FDIC acquired consumer 9,395 181 9,576 51 — 51 9,627 26 Total FDIC acquired TDRs $ 9,395 $ 181 $ 9,576 $ 631 $ 13,176 $ 13,807 $ 23,383 $ 2,370 Total loans Commercial C&I $ 13,306 $ 1,168 $ 14,474 $ 7,741 $ 5,945 $ 13,686 $ 28,160 $ 6,194 CRE 3,031 2,247 5,278 1,430 24,168 25,598 30,876 2,351 Construction — — — 580 — 580 580 42 Total commercial 16,337 3,415 19,752 9,751 30,113 39,864 59,616 8,587 Consumer Installment 39,383 600 39,983 1,429 39 1,468 41,451 1,123 Home equity lines 23,567 390 23,957 883 15 898 24,855 270 Credit card 554 111 665 — 22 22 687 225 Residential mortgages 14,863 1,764 16,627 6,018 2,510 8,528 25,155 1,038 Total consumer 78,367 2,865 81,232 8,330 2,586 10,916 92,148 2,656 Total TDRs $ 94,704 $ 6,280 $ 100,984 $ 18,081 $ 32,699 $ 50,780 $ 151,764 $ 11,243 As of December 31, 2015 Accruing TDRs Nonaccruing TDRs Total Total (In thousands) Current Delinquent Total Current Delinquent Total TDRs Allowance Originated loans Commercial C&I $ 22,566 $ 107 $ 22,673 $ 4,229 $ 6,185 $ 10,414 $ 33,087 $ 6,052 CRE 10,271 2,247 12,518 746 1,407 2,153 14,671 20 Construction — — — — — — — — Total originated commercial 32,837 2,354 35,191 4,975 7,592 12,567 47,758 6,072 Consumer Installment 34,902 794 35,696 1,125 83 1,208 36,904 1,009 Home equity lines 6,511 114 6,625 399 56 455 7,080 188 Credit card 575 140 715 — 2 2 717 243 Residential mortgages 12,869 2,896 15,765 4,611 3,529 8,140 23,905 944 Total originated consumer 54,857 3,944 58,801 6,135 3,670 9,805 68,606 2,384 Total originated TDRs $ 87,694 $ 6,298 $ 93,992 $ 11,110 $ 11,262 $ 22,372 $ 116,364 $ 8,456 Acquired loans Commercial C&I $ 7,611 $ — $ 7,611 $ — $ — $ — $ 7,611 $ — CRE — — — 659 259 918 918 201 Total acquired commercial 7,611 — 7,611 659 259 918 8,529 201 Consumer Installment 967 126 1,093 14 10 24 1,117 45 Home equity lines 6,941 655 7,596 122 — 122 7,718 70 Residential mortgages 1,096 256 1,352 802 — 802 2,154 — Total acquired consumer 9,004 1,037 10,041 938 10 948 10,989 115 Total acquired TDRs $ 16,615 $ 1,037 $ 17,652 $ 1,597 $ 269 $ 1,866 $ 19,518 $ 316 FDIC acquired loans Commercial C&I $ — $ — $ — $ — $ — $ — $ — $ — CRE — 14,056 14,056 — — — 14,056 2,333 Construction 593 — 593 — — — 593 — Total FDIC acquired commercial 593 14,056 14,649 — — — 14,649 2,333 Consumer Home equity lines 10,065 70 10,135 6 74 80 10,215 23 Residential mortgages 182 — 182 — — — 182 — Total FDIC acquired consumer 10,247 70 10,317 6 74 80 10,397 23 Total FDIC acquired TDRs $ 10,840 $ 14,126 $ 24,966 $ 6 $ 74 $ 80 $ 25,046 $ 2,356 Total Loans Commercial C&I $ 30,177 $ 107 $ 30,284 $ 4,229 $ 6,185 $ 10,414 $ 40,698 $ 6,052 CRE 10,271 16,303 26,574 1,405 1,666 3,071 29,645 2,554 Construction 593 — 593 — — — 593 — Total commercial 41,041 16,410 57,451 5,634 7,851 13,485 70,936 8,606 Consumer Installment 35,869 920 36,789 1,139 93 1,232 38,021 1,054 Home equity lines 23,517 839 24,356 527 130 657 25,013 281 Credit card 575 140 715 — 2 2 717 243 Residential mortgages 14,147 3,152 17,299 5,413 3,529 8,942 26,241 944 Total consumer 74,108 5,051 79,159 7,079 3,754 10,833 89,992 2,522 Total TDRs $ 115,149 $ 21,461 $ 136,610 $ 12,713 $ 11,605 $ 24,318 $ 160,928 $ 11,128 As of March 31, 2015 Accruing TDRs Nonaccruing TDRs Total Total (In thousands) Current Delinquent Total Current Delinquent Total TDRs Allowance Originated loans Commercial C&I $ 16,558 $ — $ 16,558 $ — $ 365 $ 365 $ 16,923 $ 124 CRE 6,031 1,493 7,524 3,724 828 4,552 12,076 71 Construction — — — — — — — — Total originated commercial 22,589 1,493 24,082 3,724 1,193 4,917 28,999 195 Consumer Installment 24,701 409 25,110 1,528 244 1,772 26,882 1,005 Home equity lines 6,680 113 6,793 811 28 839 7,632 254 Credit card 721 77 798 — 17 17 815 263 Residential mortgages 14,299 2,286 16,585 5,020 3,217 8,237 24,822 1,416 Total originated consumer 46,401 2,885 49,286 7,359 3,506 10,865 60,151 2,938 Total originated TDRs $ 68,990 $ 4,378 $ 73,368 $ 11,083 $ 4,699 $ 15,782 $ 89,150 $ 3,133 Acquired loans Commercial C&I $ — $ — $ — $ 2 $ — $ 2 $ 2 $ 2 CRE — — — 954 1,499 2,453 2,453 135 Total acquired commercial — — — 956 1,499 2,455 2,455 137 Consumer Installment 1,139 33 1,172 23 — 23 1,195 48 Home equity lines 6,610 564 7,174 136 — 136 7,310 — Residential mortgages 1,335 — 1,335 616 235 851 2,

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill Goodwill totaled $741.7 million as of March 31, 2016 , December 31, 2015 , and March 31, 2015 . 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, 2015 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. March 31, 2016 Gross Carrying Accumulated Net Carrying (In thousands) Amount Amortization Amount Core deposit intangibles (1) $ 82,323 $ (30,194 ) $ 52,129 Lease intangible 238 (220 ) 18 Trust Relationships (2) 14,000 (7,823 ) 6,177 $ 96,561 (38,237 ) $ 58,324 December 31, 2015 Gross Carrying Accumulated Net Carrying (In thousands) Amount Amortization Amount Core deposit intangibles (1) $ 82,323 $ (28,304 ) $ 54,019 Lease intangible 238 (212 ) 26 Trust Relationships (2) 14,000 (7,417 ) 6,583 $ 96,561 (35,933 ) $ 60,628 March 31, 2015 Gross Carrying Accumulated Net Carrying (In thousands) Amount Amortization Amount Core deposit intangibles (1) $ 82,323 $ (22,073 ) $ 60,250 Lease intangible 238 (185 ) 53 Trust relationships (2) 14,000 (5,881 ) 8,119 $ 96,561 (28,139 ) $ 68,422 (1) Core deposit intangibles are amortized on an accelerated basis over their estimated useful lives, which range from 10 - 15 years. (2) Trust relationship intangibles are amortized on an accelerated basis on their estimated useful lives of 12 years . Amortization expense for intangible assets was $2.3 million in the three months ended March 31, 2016 , compared to $2.6 million in the three months ended March 31, 2015 . Estimated amortization expense for each of the next five years is as follows: remainder of 2016 - $6.9 million ; 2017 - $8.2 million ; 2018 - $7.3 million ; and 2019 - $6.5 million ; 2020 - $5.2 million .

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Stockholders' Equity	Shareholders' Equity Common Stock Warrant On May 13, 2015, the Corporation repurchased a warrant previously issued by Citizens to the U.S. Treasury. The warrant, which entitled the U.S. Treasury to purchase 2,571,998 shares of FirstMerit Common Stock at an adjusted strike price of $17.50 , was purchased for $12.2 million . In accordance with GAAP, the Corporation recorded a reduction to capital surplus in the amount of $9.2 million in conjunction with this warrant repurchase that reflected the excess amount paid over the previously stated amount. 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 Non-Cumulative Perpetual Preferred Stock, Series A, which began paying cash dividends on May 4, 2013, quarterly in arrears on the 4 th 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 March 31, (Dollars in thousands, except per share amounts) 2016 2015 Basic EPS: Net income $ 54,136 $ 57,139 Less: Cash dividends on 5.875% non-cumulative perpetual series A, Preferred Stock 1,469 1,469 Income allocated to participating securities 387 407 Net income attributable to common shareholders $ 52,280 $ 55,263 Weighted average Common Stock outstanding used in basic EPS 165,745 165,411 Basic net income per common share $ 0.32 $ 0.33 Diluted EPS: Income used in diluted earnings per common share calculation $ 52,280 $ 55,263 Weighted average Common Stock outstanding used in basic EPS 165,745 165,411 Add: Common Stock equivalents Employee stock award plans 494 592 Weighted average Common and Common Stock equivalent shares outstanding 166,239 166,003 Diluted net income per common share $ 0.31 $ 0.33 Common Stock equivalents consist of employee stock award plans. 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 three months ended March 31, 2016 and 2015 totaled 0.5 million and 0.8 million , respectively.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2016
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. Retail offers a variety of retail financial products and services including consumer direct and indirect installment loans, debit and credit 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, eliminating 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 2015 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. 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. Mismatches between asset and liability cash flows as well as interest rate risk for mortgage servicing rights and mortgage origination business 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 months ended March 31, 2016 and March 31, 2015 : FirstMerit (In thousands) Commercial Retail Wealth Other Consolidated March 31, 2016 QTD QTD QTD QTD QTD OPERATIONS: Net interest income/(loss) $ 102,619 $ 94,728 $ 6,552 $ (18,743 ) $ 185,156 Provision/ (recapture) for loan losses 5,772 4,047 (155 ) (1,855 ) 7,809 Noninterest income 21,179 23,594 14,309 8,312 67,394 Noninterest expense 61,020 88,694 13,353 3,896 166,963 Net income/(loss) 37,054 16,628 4,981 (4,527 ) 54,136 AVERAGES: Assets $ 9,592,202 $ 6,232,255 $ 305,566 $ 9,640,834 $ 25,770,857 Loans 9,709,788 6,020,757 297,143 51,759 16,079,447 Earning assets 10,074,234 6,027,689 297,143 6,491,016 22,890,082 Deposits 7,478,489 11,025,256 1,319,711 812,209 20,635,665 Economic capital 1,252,294 872,762 131,588 713,523 2,970,167 FirstMerit (In thousands) Commercial Retail Wealth Other Consolidated March 31, 2015 QTD QTD QTD QTD QTD OPERATIONS: Net interest income/(loss) $ 99,844 $ 91,095 $ 5,353 $ (10,669 ) $ 185,623 Provision/ (recapture) for loan losses (526 ) 7,533 (170 ) 1,411 8,248 Noninterest income 22,490 21,737 13,976 7,644 65,847 Noninterest expense 61,653 88,271 13,719 (2,991 ) 160,652 Net income/(loss) 39,785 11,068 3,756 2,530 57,139 AVERAGES: Assets $ 9,454,218 $ 5,845,417 $ 302,186 $ 9,303,273 $ 24,905,094 Loans 9,506,529 5,570,590 292,016 58,046 15,427,181 Earning assets 9,794,483 5,582,849 292,016 6,431,069 22,100,417 Deposits 6,886,945 11,124,158 1,240,960 536,862 19,788,925 Economic capital 848,890 479,188 55,187 1,483,097 2,866,362

Derivatives and Hedging Activit

Derivatives and Hedging Activities	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	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 March 31, 2016 , December 31, 2015 , and March 31, 2015 , 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 March 31, 2016 December 31, 2015 March 31, 2015 March 31, 2016 December 31, 2015 March 31, 2015 (In thousands) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps: Commercial loan swaps (FRAPS) $ — $ — $ — $ — $ — $ — $ 52,821 $ 3,238 $ 55,689 $ 3,536 $ 89,591 $ 6,063 Sub debt swap 250,000 22,718 250,000 8,739 250,000 12,688 — — — — — — Fair value hedges $ 250,000 $ 22,718 $ 250,000 $ 8,739 $ 250,000 $ 12,688 $ 52,821 $ 3,238 $ 55,689 $ 3,536 $ 89,591 $ 6,063 ( 1) Included in "Other assets" on the Consolidated Balance Sheets (2) Included in "Other liabilities" on the Consolidated Balance Sheets Commercial Loan Swaps. Prior to 2008, 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. Sub Debt Swap. During the fourth quarter of 2014, the Corporation entered into a $250.0 million interest rate swap simultaneously with its long-term debt issuance for interest rate risk management purposes. This interest rate swap effectively modifies the receipt of fixed-rate interest amounts in exchange for floating-rate interest payments over the life of the swap, without an exchange of the underlying principal amount. This interest rate swap was designated as a fair value hedge, and through application of the “shortcut method of accounting”, there is an assumption that the hedge is effective in offsetting changes in the fair value of the long-term debt due to changes in the U.S. LIBOR swap rate (the designated benchmark interest rate). Derivatives Not Designated in Hedge Relationships As of March 31, 2016 , December 31, 2015 , and March 31, 2015 , 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 March 31, 2016 December 31, 2015 March 31, 2015 March 31, 2016 December 31, 2015 March 31, 2015 (In thousands) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps $ 1,850,414 $ 75,139 $ 1,824,576 $ 48,920 $ 1,718,850 $ 59,147 $ 1,850,414 $ 75,139 $ 1,824,576 $ 48,920 $ 1,718,850 $ 59,147 Mortgage loan commitments 40,904 240 20,635 149 51,937 388 — — — — — — Forward sales contracts — — — — 7,527 82 9,659 5 11,758 68 Credit contracts — — — — — — 74,315 8 73,715 — 80,047 — Foreign exchange 15,467 452 13,671 299 40,537 350 8,641 154 11,706 284 10,052 169 Equity swap — — — — — — 36,125 — 36,631 — 30,896 — Total $ 1,906,785 $ 75,831 $ 1,858,882 $ 49,368 $ 1,811,324 $ 59,885 $ 1,977,022 $ 75,383 $ 1,956,287 $ 49,209 $ 1,851,603 $ 59,384 (1) Included in "Other assets" on the Consolidated Balance Sheets (2) 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 result 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 in 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 two to seven 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 nine 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 $6.4 million as of March 31, 2016 . The fair values of the written swap participations were not material at March 31, 2016 , December 31, 2015 , and March 31, 2015 . Gains and losses recognized in income on non-designated hedging instruments for the three months ended March 31, 2016 and 2015 are as follows: Derivatives not instruments Location of Gain/(Loss) Derivative Amount of Gain / (Loss) Recognized in Income on Derivatives (In thousands) Three Months Ended March 31, 2016 2015 Mortgage loan commitments Loan sales and servicing income $ 92 $ (1,020 ) Forward sales contracts Loan sales and servicing income (77 ) 204 Foreign exchange contracts Other operating income 819 (877 ) Equity swap Other operating expense — — Total $ 834 $ (1,693 ) 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. All derivative contracts may be executed only with exchanges or counterparties approved by the Corporation's Board of Directors. 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 with collateral delivery thresholds on all bilateral derivatives. 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 approved by the Corporation's Board of Directors. The Corporation generally posts collateral in the form of highly rated Government Agency issued bonds or MBS. The majority of the Corporation's over-the-counter derivative transactions are cleared through a recognized derivative clearing organization ("Clearinghouse"). For cleared derivatives, the Clearinghouse is the Corporation's counterparty. The Clearinghouse notifies the clearing agent of the required initial and variation margin and the clearing agent notifies the Corporation of the required initial and variation margin. The requirement that the Corporation post initial and variation margin through the clearing agent to the Clearinghouse exposes the Corporation to institutional credit risk if the clearing agent or the Clearinghouse fails to meet its obligations. The use of cleared derivatives is intended to mitigate credit risk exposure because a central counterparty is substituted for individual counterparties and collateral is posted daily through a clearing agent for changes in the value of cleared derivatives. The fair value of investment securities posted as collateral against derivative liabilities was $45.1 million , $47.2 million , and $53.6 million as of March 31, 2016 , December 31, 2015 , and March 31, 2015 , 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 in the 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 March 31, 2016 , December 31, 2015 , and March 31, 2015 . 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 March 31, 2016 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 (1) Collateral (2) Derivative Assets Interest rate swaps - designated $ 22,718 $ — $ 22,718 $ — $ — $ 22,718 Interest rate swaps - non-designated 20 $ — 20 (20 ) — — Foreign exchange 27 — 27 (27 ) — — Total derivative assets $ 22,765 $ — $ 22,765 $ (47 ) $ — $ 22,718 Derivative liabilities Interest rate swaps - designated $ 3,238 $ — $ 3,238 $ — $ (3,238 ) $ — Interest rate swaps - non-designated 75,119 — 75,119 (20 ) (75,099 ) — Foreign exchange 121 — 121 (27 ) (94 ) — Total derivative liabilities $ 78,478 $ — $ 78,478 $ (47 ) $ (78,431 ) $ — As of December 31, 2015 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 (1) Collateral (2) Derivative assets Interest rate swaps - designated $ 8,739 $ — $ 8,739 $ — $ — $ 8,739 Interest rate swaps - non-designated 155 — 155 (155 ) — — Foreign exchange 270 — 270 (32 ) (238 ) — Total derivative assets $ 9,164 $ — $ 9,164 $ (187 ) $ (238 ) $ 8,739 Derivative liabilities Interest rate swaps - designated $ 3,536 $ — $ 3,536 $ — $ (3,536 ) $ — Interest rate swaps - non-designated 48,765 — 48,765 (155 ) (48,610 ) — Foreign exchange 32 — 32 (32 ) — — Total derivative liabilities $ 52,333 $ — $ 52,333 $ (187 ) $ (52,146 ) $ — As of March 31, 2015 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 (1) Collateral (2) Derivative assets Interest rate swaps - designated 12,688 — 12,688 — — 12,688 Interest rate swaps - non-designated $ 67 $ — $ 67 $ (67 ) $ — $ — Foreign exchange 219 — 219 (47 ) (172 ) — Total derivative assets $ 12,974 $ — $ 12,974 $ (114 ) $ (172 ) $ 12,688 Derivative liabilities Interest rate swaps - designated $ 6,063 $ — $ 6,063 $ — $ (6,063 ) $ — Interest rate swaps - non-designated 59,080 — 59,080 (67 ) (59,013 ) — Foreign exchange 47 — 47 (47 ) — — Total derivative liabilities $ 65,190 $ — $ 65,190 $ (114 ) $ (65,076 ) $ — (1) 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. (2) 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	3 Months Ended
	Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Benefit Plans	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 March 31, (In thousands) 2016 2015 Service cost $ 198 $ 207 Interest cost 3,649 3,517 Expected return on assets (3,788 ) (3,902 ) Amortization of unrecognized prior service costs 75 570 Amortization of actuarial losses/(gains) 830 1,057 Net periodic pension cost $ 964 $ 1,449 Postretirement Benefits Three Months Ended March 31, (In thousands) 2016 2015 Service cost $ 26 $ 41 Interest cost 64 144 Amortization of unrecognized prior service costs (636 ) (160 ) Amortization of actuarial losses/(gains) 245 81 Net periodic postretirement cost $ (301 ) $ 106 For further information on the Corporation's employee benefit plans, refer to Note 13 (Benefit Plans) to the consolidated financial statements in the 2015 Form 10-K.

Fair Value Measurement

Fair Value Measurement	3 Months Ended
	Mar. 31, 2016
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 follows: • 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". The following tables present the balance of assets and liabilities measured at fair value on a recurring and nonrecurring basis as of March 31, 2016 , December 31, 2015 , and March 31, 2015 : Fair Value by Hierarchy (In thousands) March 31, 2016 Level 1 Level 2 Level 3 Recurring fair value measurement Available-for-sale securities: Marketable equity securities $ 2,873 $ 2,873 $ — $ — U.S. government agency debentures 2,520 — 2,520 — U.S. States and political subdivisions 173,141 — 173,141 — Residential mortgage-backed securities: U.S. government agencies 907,656 — 907,656 — Commercial mortgage-backed securities: U.S. government agencies 184,248 — 184,248 — Residential collateralized mortgage-backed securities: U.S. government agencies 2,226,737 — 2,226,737 — Non-agency 4 — — 4 Commercial collateralized mortgage-backed securities: U.S. government agencies 272,882 — 272,882 — Corporate debt securities 48,756 — — 48,756 Asset-backed securities: Collateralized loan obligations 285,397 — — 285,397 Total available for sale securities 4,104,214 2,873 3,767,184 334,157 Residential loans held for sale 5,249 — 5,249 — Derivative assets: Interest rate swaps - fair value hedges 22,718 — 22,718 — Interest rate swaps - nondesignated 75,139 — 75,139 — Mortgage loan commitments 240 — 240 — Foreign exchange 452 — 452 — Total derivative assets 98,549 — 98,549 — Total fair value of assets (1) $ 4,208,012 $ 2,873 $ 3,870,982 $ 334,157 Derivative liabilities: Interest rate swaps - fair value hedges $ 3,238 $ — $ 3,238 $ — Interest rate swaps - nondesignated 75,139 — 75,139 — Forward sales contracts 82 — 82 — Credit contracts 8 — 8 — Foreign exchange 154 — 154 — Total derivative liabilities 78,621 — 78,621 — True-up liability 15,115 — — 15,115 Total fair value of liabilities (1) $ 93,736 $ — $ 78,621 $ 15,115 Nonrecurring fair value measurement Mortgage servicing rights (2) $ 17,460 $ — $ — $ 17,460 Impaired loans (3) 86,315 — — 86,315 Other property (4) 13,629 — — 13,629 Total nonrecurring fair value $ 117,404 $ — $ — $ 117,404 (1) There were no transfers between levels 1, 2 or 3 of the fair value hierarchy during the three months ended March 31, 2016 . (2) MSRs with a recorded investment of $18.1 million were reduced by a specific valuation allowance totaling $0.9 million to a reported carrying value of $17.3 million resulting in recognition of $0.5 million in expense included in loan sales and servicing income in the three months ended March 31, 2016 . (3) At March 31, 2016 , collateral dependent impaired loans with a recorded investment of $94.1 million were reduced by specific valuation allowance allocations totaling $7.8 million to a reported net carrying value of $86.3 million . (4) Amounts do not include assets held at cost at March 31, 2016 . During the three months ended March 31, 2016 , the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $2.0 million included in noninterest expense. Fair Value by Hierarchy (In thousands) December 31, 2015 Level 1 Level 2 Level 3 Recurring fair value measurement Available-for-sale securities: Marketable equity securities $ 2,821 $ 2,821 $ — $ — U.S treasury notes & bonds 5,000 — 5,000 — U.S. government agency debentures 2,498 — 2,498 — U.S. States and political subdivisions 192,795 — 192,795 — Residential mortgage-backed securities: U.S. government agencies 906,229 — 906,229 — Commercial mortgage-backed securities: U.S. government agencies 172,109 — 172,109 — Residential collateralized mortgage-backed securities: U.S. government agencies 2,128,320 — 2,128,320 — Non-agency 4 — — 4 Commercial collateralized mortgage-backed securities: U.S. government agencies 216,319 — 216,319 — Corporate debt securities 52,229 — — 52,229 Asset-backed securities Collateralized loan obligations 289,411 — — 289,411 Total available-for-sale securities 3,967,735 2,821 3,623,270 341,644 Residential loans held for sale 5,472 — 5,472 — Derivative assets: Interest rate swaps - fair value hedges 8,739 — 8,739 — Interest rate swaps - nondesignated 48,920 — 48,920 — Mortgage loan commitments 149 — 149 — Foreign exchange 299 — 299 — Total derivative assets 58,107 — 58,107 — Total fair value of assets (1) $ 4,031,314 $ 2,821 $ 3,686,849 $ 341,644 Derivative liabilities: Interest rate swaps - fair value hedges $ 3,536 $ — $ 3,536 $ — Interest rate swaps - nondesignated 48,920 — 48,920 — Forward sale contracts 5 — 5 — Foreign exchange 284 — 284 — Total derivative liabilities 52,745 — 52,745 — True-up liability 14,750 — — 14,750 Total fair value of liabilities (1) $ 67,495 $ — $ 52,745 $ 14,750 Nonrecurring fair value measurement Mortgage servicing rights (2) $ 19,149 $ — $ — $ 19,149 Impaired loans (3) 71,428 — — 71,428 Other property (4) 18,576 — — 18,576 Other real estate covered by loss share (5) 365 — — 365 Total nonrecurring fair value $ 109,518 $ — $ — $ 109,518 (1) There were no transfers between levels 1, 2 or 3 of the fair value hierarchy during the year ended December 31, 2015 . (2) MSRs with a recorded investment of $18.9 million were reduced by a specific valuation allowance totaling $0.4 million to a reported carrying value of $18.5 million resulting in a recovery of previously recognized expense of $0.6 million in recoveries included in loans sales and servicing income in the year ended December 31, 2015 . (3) At December 31, 2015 , collateral dependent impaired loans with a recorded investment of $84.3 million were reduced by specific valuation allowance allocations totaling $12.9 million to a reported net carrying value of $71.4 million . (4) Amounts do not include assets held at cost at December 31, 2015 . During the year ended December 31, 2015 , the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $4.5 million included in noninterest expense. (5) Amounts do not include assets held at cost at December 31, 2015 . During the year ended December 31, 2015 , the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.6 million included in noninterest expense. Fair Value by Hierarchy (In thousands) March 31, 2015 Level 1 Level 2 Level 3 Recurring fair value measurement Available-for-sale securities: Marketable equity securities $ 2,869 $ 2,869 $ — $ — U.S. government agency debentures 2,513 — 2,513 — U.S. States and political subdivisions 215,164 — 215,164 — Residential mortgage-backed securities: U.S. government agencies 947,303 — 947,303 — Commercial mortgage-backed securities: U.S. government agencies 140,359 — 140,359 — Residential collateralized mortgage-backed securities: U.S. government agencies 1,892,560 — 1,892,560 — Non-agency 6 — 1 5 Commercial collateralized mortgage-backed securities: U.S. government agencies 244,059 — 244,059 — Corporate debt securities 52,264 — — 52,264 Asset-backed securities: Collateralized loan obligations 293,962 — — 293,962 Total available-for-sale securities 3,791,059 2,869 3,441,959 346,231 Residential loans held for sale 3,568 — 3,568 — Derivative assets: Interest rate swaps - fair value hedges 12,688 — 12,688 — Interest rate swaps - nondesignated 59,147 — 59,147 — Mortgage loan commitments 388 — 388 — Foreign exchange 350 — 350 — Total derivative assets 72,573 — 72,573 — Total fair value of assets (1) $ 3,867,200 $ 2,869 $ 3,518,100 $ 346,231 Derivative liabilities: Interest rate swaps - fair value hedges $ 6,063 $ — $ 6,063 $ — Interest rate swaps - nondesignated 59,147 — 59,147 — Forward sale contracts 68 — 68 — Foreign exchange 169 — 169 — Total derivative liabilities 65,447 — 65,447 — True-up liability 13,707 — — 13,707 Total fair value of liabilities (1) $ 79,154 $ — $ 65,447 $ 13,707 Nonrecurring fair value measurement Mortgage servicing rights (2) $ 20,526 $ — $ — $ 20,526 Impaired loans (3) 63,839 — — 63,839 Other property (4) 16,956 — — 16,956 Other real estate covered by loss share (5) 7,293 — — 7,293 Total nonrecurring fair value $ 108,614 $ — $ — $ 108,614 (1) There were no transfers between levels 1, 2 and 3 of the fair value hierarchy during the three months ended March 31, 2015 . (2) MSRs with a recorded investment of $21.5 million were reduced by a specific valuation allowance totaling $1.1 million to a reported carrying value of $20.4 million resulting in recovery of a previously recognized expense of $0.2 million in the three months ended March 31, 2015 . (3) At March 31, 2015 , collateral dependent impaired loans with a recorded investment of $75.6 million were reduced by specific valuation allowance allocations totaling $11.8 million to a reported net carrying value of $63.8 million . (4) Amounts do not include assets held at cost at March 31, 2015 . During the three months ended March 31, 2015 , the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.9 million included in noninterest expense. (5) Amounts do not include assets held at cost at March 31, 2015 . During the three months ended March 31, 2015 , the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.3 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 March 31, 2016 and 2015 , 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 92% 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 March 31, 2016 , 8% 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 are 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 Bank's Board 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 March 31, 2016 . True-up liability. In connection with the George Washington and Midwest FDIC assisted 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 share 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 share agreements. The resulting values under both calculations are discounted over 10 years (the period defined in the loss share 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 3.46% and 3.05% as of March 31, 2016 and 2015 , respectively. Increasing or decreasing the discount rate by one percentage point would change the liability by approximately $0.6 million and $0.6 million , respectively, as of March 31, 2016 . In accordance with the loss share 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 $9.6 million , $9.3 million , and $8.6 million as of March 31, 2016 , December 31, 2015 , and March 31, 2015 , respectively. In accordance with the loss share 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 $5.5 million , $5.5 million , and $5.1 million as of March 31, 2016 , December 31, 2015 , and March 31, 2015 , 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 share 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 share 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 are components of the true-up calculations and 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 months ended March 31, 2016 and 2015 are summarized as follows: Three Months Ended March 31, 2016 2015 (In thousands) Available-for-sale securities True-up liability Available-for-sale securities True-up liability Balance at beginning of period $ 341,644 $ 14,750 $ 339,187 $ 13,294 (Gains) losses included in earnings (1) — 365 — 413 Unrealized gains (losses) (2) (7,556 ) — 6,682 — Purchases — — — — Sales — — Settlements 69 — 362 — Balance at ending of period $ 334,157 $ 15,115 $ 346,231 $ 13,707 (1) Reported in "Other expense" (2) 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 March 31, 2016 , December 31, 2015 , and March 31, 2015 . The aggregate fair value, contractual balance and gain or loss on loans held for sale was as follows: (In thousands) March 31, 2016 December 31, 2015 March 31, 2015 Aggregate fair value carrying amount $ 5,249 $ 5,472 $ 3,568 Aggregate unpaid principal / contractual balance 5,084 5,320 3,400 Carrying amount over aggregate unpaid principal (1) $ 165 $ 152 $ 168 (1) 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 March 31, 2016 , December 31, 2015 , and March 31, 2015 are shown in the tables below. March 31, 2016 Carrying Amount Fair Value (In thousands) Total Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 759,897 $ 759,897 $ 759,897 $ — $ — Available-for-sale securities 4,104,214 4,104,214 2,873 3,767,184 334,157 Held-to-maturity securities 2,613,700 2,632,274 — 2,632,274 — Other securities 148,159 148,159 — 148,159 — Loans held for sale 5,249 5,249 — 5,249 — Net originated loans 14,286,598 14,069,307 — — 14,069,307 Net acquired loans 1,629,283 1,681,087 — — 1,681,087 Net FDIC acquired loans and loss share receivable 157,632 157,632 — — 157,632 Accrued interest receivable 70,280 70,280 — 70,280 — Derivatives 98,549 98,549 — 98,549 — Financial liabilities: Deposits $ 21,101,366 $ 21,109,594 $ — $ 21,109,594 $ — Federal funds purchased and securities sold under agreements to repurchase 719,850 719,850 — 719,850 — Wholesale borrowings 378,996 383,432 — 383,432 — Long-term debt 519,249 504,468 — 504,468 — Accrued interest payable 10,093 10,093 — 10,093 — Derivatives 78,621 78,621 — 78,621 — December 31, 2015 Carrying Amount Fair Value (In thousands) Total Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 463,817 $ 463,817 $ 463,817 $ — $ — Available-for-sale securities 3,967,735 3,967,735 2,821 3,623,270 341,644 Held-to-maturity securities 2,674,093 2,659,119 — 2,659,119 — Other securities 148,172 148,172 — 148,172 — Loans held for sale 5,472 5,472 — 5,472 — Net originated loans 14,013,370 13,795,058 — — 13,795,058 Net acquired loans 1,739,194 1,796,314 — — 1,796,314 Net FDIC acquired loans and loss share receivable 170,690 170,690 — — 170,690 Accrued interest receivable 67,887 67,887 — 67,887 — Derivatives 58,107 58,107 — 58,107 — Financial liabilities: Deposits $ 20,108,003 $ 20,116,298 $ — $ 20,116,298 $ — Federal funds purchased and securities sold under agreements to repurchase 1,037,075 1,037,075 — 1,037,075 — Wholesale borrowings 580,648 582,120 — 582,120 — Long-term debt 505,173 503,675 — 503,675 — Accrued interest payable 10,758 10,758 — 10,758 — Derivatives 52,745 52,745 — 52,745 — March 31, 2015 Carrying Am

Mortgage Servicing Rights and M

Mortgage Servicing Rights and Mortgage Servicing Activity	3 Months Ended
	Mar. 31, 2016
Transfers and Servicing [Abstract]
Mortgage Servicing Rights and Mortgage Servicing Activity	Mortgage Servicing Rights and Mortgage Servicing Activity In the three months ended March 31, 2016 and 2015 , the Corporation sold residential mortgage loans from the held for sale portfolio with unpaid principal balances of $7.7 million and $50.3 million , respectively, and recognized pretax gains of $0.2 million and $0.6 million , respectively, which are included as a component of loan sales and servicing income. As of March 31, 2016 and 2015 , the Corporation retained the related MSRs, for which it receives servicing fees, on $3.3 million and $45.2 million , respectively, of the loans sold. The Corporation serviced for third parties approximately $2.3 billion of residential mortgage loans at March 31, 2016 and $2.6 billion at March 31, 2015 . Loan servicing fees, not including valuation changes included in loan sales and servicing income, were $1.4 million and $1.6 million , respectively, for the three months ended March 31, 2016 and 2015 . 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 March 31, (In thousands) 2016 2015 Carrying amount of MSRs Beginning balance $ 18,938 $ 22,011 Additions 28 470 Amortization (839 ) (991 ) Ending balance 18,127 21,490 Valuation Allowance: Beginning balance (399 ) (955 ) Recoveries/(Additions) (469 ) (176 ) Ending balance (868 ) (1,131 ) MSRs, net carrying balance $ 17,259 $ 20,359 Fair value at end of period $ 17,460 $ 20,526 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 three months ended March 31, 2016 and 2015 . 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 March 31, 2016 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. (Dollars in thousands) Prepayment speed assumption (annual CPR) 13.30 % Decrease in fair value from 10% adverse change $ 691 Decrease in fair value from 25% adverse change $ 1,342 Discount rate assumption 9.39 % Decrease in fair value from 100 basis point adverse change $ 528 Decrease in fair value from 200 basis point adverse change $ 1,022 Expected weighted-average life (in months) 90

Contingencies and Guarantees

Contingencies and Guarantees	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Contingencies and Guarantees	Commitments and Guarantees 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 10 ( Fair Value Measurement ). 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 March 31, 2016 , December 31, 2015 , and March 31, 2015 , included in “accrued expenses and other liabilities” on the Consolidated Balance Sheets, was $4.9 million , $4.1 million , and $4.3 million , respectively. The Corporation's credit risk associated with these instruments is represented by the contractual amounts indicated in the following table. Unused commitments to extend credit (In thousands) March 31, 2016 December 31, 2015 March 31, 2015 Commercial $ 3,609,266 $ 3,992,089 $ 3,691,193 Consumer 2,458,973 2,393,058 2,343,677 Total unused commitments to extend credit $ 6,068,239 $ 6,385,147 $ 6,034,870 Unused Commitments to Extend Credit. Commitments to extend credit are legally binding agreements to lend to a customer, provided there is no violation of any condition established in the contract. These commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Collateral held varies but may include accounts receivable, inventory, property, plant and equipment, and income-producing commercial properties. Since many commitments expire without being drawn upon, the total contractual amount of commitments does not necessarily represent future cash requirements of the Corporation. 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 ). Guarantees The Corporation is a guarantor in certain agreements with third parties. The Corporation's maximum credit risk associated with these instruments is represented by the contractual amounts indicated in the following table. Financial guarantees (In thousands) March 31, 2016 December 31, 2015 March 31, 2015 Standby letters of credit $ 236,642 $ 254,703 $ 275,736 Loans sold with recourse 11,781 12,902 39,996 Total financial guarantees $ 248,423 $ 267,605 $ 315,732 Standby Letters of Credit. 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 Corporation has recourse against the customer for any amount required to be paid to a third party under a standby letter of credit. Collateral held varies, but may include marketable securities, equipment, inventory, and real estate. Except for short-term guarantees of $118.2 million at March 31, 2016 , the remaining guarantees extend in varying amounts through 2024 . Loans Sold with Recourse. 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 service released residential mortgage loans to other investors which contain early payment default recourse provisions. As of March 31, 2016 , December 31, 2015 , and March 31, 2015 , the Corporation had sold $9.2 million , $10.1 million , and $33.1 million , respectively, of outstanding residential mortgage loans to GSEs and other investors with recourse provisions. The Corporation had reserved $2.6 million , $2.7 million , and $6.7 million as of March 31, 2016 , December 31, 2015 , and March 31, 2015 , respectively, for estimated losses from representation and warranty obligations and early payment default recourse provisions. The reserve associated with loans sold with recourse 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 repurchase reserves for the three months ended March 31, 2016 and 2015 are as follows: Three Months Ended March 31, (In thousands) 2016 2015 Balance at beginning of period $ 2,725 $ 7,250 Net increase/(decrease) to reserve (53 ) (402 ) Net realized (losses)/gains (47 ) (198 ) Balance at end of period $ 2,625 $ 6,650 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. 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. 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. 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." The plaintiffs filed a third amended complaint in November 2015, and the defendants have filed a motion that the complaint be dismissed. Merger litigation Five putative derivative and class action lawsuits have been filed by separate shareholders of FirstMerit Corporation (“FirstMerit”) relating to the proposed merger between Huntington Bancshares, Inc. (“Huntington”) and FirstMerit. Two of those lawsuits were filed in the Summit County Common Pleas Court, Ohio: W. Patrick Murray v. Huntington Bancshares Incorporated , Case No. CV-2016-02-0917, was filed on February 11, 2016; and The Robinson Family Trust v. Paul Greig , Case No. CV-2016-02-0981, was filed on February 17, 2016 (the “State Court Lawsuits”). On April 14, 2016, the State Court Lawsuits were consolidated. The State Court Lawsuits consolidated complaint alleges that the individual directors of FirstMerit breached their fiduciary duties by approving a proposed merger that allegedly undervalues FirstMerit, allegedly provides the directors with benefits not afforded FirstMerit shareholders, and allegedly includes deal protection devices to ensure that the proposed merger will be consummated. The consolidated complaint also alleges that the directors approved a Registration Statement on S-4, filed on March 4, 2016, (the “Registration Statement”) that omits material information about the proposed merger. It also alleges that Huntington aided and abetted the alleged breaches of fiduciary duty. It seeks declaratory and injunctive relief to prevent the consummation of the proposed merger, an award of fees and costs, and other equitable relief. The other three lawsuits were filed in the United States District Court for the Northern District of Ohio: Wojno v. FirstMerit Corp. , Case No. 5:16-cv-461, was filed on February 26, 2016; Wilkinson v. FirstMerit Corp. , Case No. 5:16-cv-723, was filed on March 23, 2016; and Hafner v. Greig , Case No 5:16-cv-762, was filed on March 28, 2016 (the “Federal Court Lawsuits”). On April 8, 2016, the parties to the Federal Court Lawsuits filed a stipulation that, among other things, would consolidate the actions and designate a consolidated complaint. The stipulation remains pending. Each complaint in the Federal Court Lawsuits makes similar allegations to the State Court Lawsuits consolidated complaint, and also alleges that the directors violated Sections 14(a) and 20(a) of the Securities Exchange of 1934 and Rule 14a-9 promulgated thereunder by approving the Registration Statement. The Hafner complaint also alleges that Huntington violated Section 20(a) of the Securities Exchange Act in connection with the Registration Statement. Each complaint in the Federal Court Lawsuits seeks similar relief to the State Court Lawsuits consolidated complaint. On April 13, 2016, the defendants in the State Court Lawsuits filed a motion to stay the State Court Lawsuits pending the resolution of the parallel Federal Court Lawsuits. The motion to stay remains pending.

Changes and Reclassifications O

Changes and Reclassifications Out of Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2016
Changes and Reclassifications Out of Other Comprehensive Income [Abstract]
Changes and Reclassifications Out of Accumulated Other Comprehensive Income	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 months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 (In thousands) Pretax Tax After tax Unrealized and realized securities gains and losses: Balance at the beginning of the period $ (32,786 ) $ (15,840 ) $ (16,946 ) Changes in unrealized securities' holding gains/(losses) 48,379 17,562 30,817 Changes in unrealized securities' holding gains/(losses) that result from securities being transferred from available-for-sale into held-to-maturity (1,441 ) (147 ) (1,294 ) Net losses/(gains) realized on sale of securities reclassified to noninterest income 295 107 188 Balance at the end of the period 14,447 1,682 12,765 Pension plans and other postretirement benefits: Balance at the beginning of the period (95,760 ) (33,432 ) (62,328 ) Current year actual losses/(gains) — — — Amortization of actuarial losses/(gains) 2,168 773 1,395 Amortization of prior service cost reclassified to other noninterest expense (260 ) (87 ) (173 ) Balance at the end of the period (93,852 ) (32,746 ) (61,106 ) Total Accumulated Other Comprehensive Income $ (79,405 ) $ (31,064 ) $ (48,341 ) Three Months Ended March 31, 2015 (In thousands) Pretax Tax After tax Unrealized and realized securities gains and losses: Balance at the beginning of the period $ (8,531 ) $ (2,985 ) $ (5,546 ) Changes in unrealized securities' holding gains/(losses) 34,117 11,941 22,176 Changes in unrealized securities' holding gains/(losses) that result from securities being transferred from available-for-sale into held-to-maturity (504 ) (176 ) (328 ) Net losses/(gains) realized on sale of securities reclassified to noninterest income (354 ) (124 ) (230 ) Balance at the end of the period 24,728 8,656 16,072 Pension plans and other postretirement benefits: Balance at the beginning of the period (102,068 ) (35,722 ) (66,346 ) Amortization of actuarial losses/(gains) 1,138 398 740 Amortization of prior service cost reclassified to other noninterest expense 410 143 267 Balance at the end of the period (100,520 ) (35,181 ) (65,339 ) Total Accumulated Other Comprehensive Income $ (75,792 ) $ (26,525 ) $ (49,267 ) The following table presents current period reclassifications out of AOCI by component of comprehensive income for the three months ended March 31, 2016 and 2015 : Three Months Ended (In thousands) March 31, 2016 Income statement line item presentation Realized (gains)/losses on sale of securities $ 295 Investment securities losses (gains), net Tax expense (benefit) (36.3%) 107 Income tax expense (benefit) Reclassified amount, net of tax $ 188 Three Months Ended (In thousands) March 31, 2015 Income statement line item presentation Realized (gains)/losses on sale of securities $ (354 ) Investment securities losses (gains), net Tax expense (benefit) (35%) (124 ) Income tax expense (benefit) Reclassified amount, net of tax $ (230 )

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2016
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 Polici23

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards FASB ASU 2015-16, Business Combinations (Topic 805), Simplifying the Accounting for Measurement-Period Adjustments. The amendments in ASU 2015-16 require an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. For public business entities, the amendments in this update are effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. The amendments in this update will be applied prospectively to adjustments to provisional amounts that occur after the effective date of this update with earlier application permitted for financial statements that have not been issued. The adoption of this guidance did not have a material effect on the Corporation's financial position or results of operations. FASB ASU 2015-5 , Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. The amendments in ASU 2015-05 provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The guidance will not change GAAP for a customer’s accounting for service contracts. In addition, the guidance in this update supersedes 350-40-25-16. Consequently, all software licenses within the scope of Subtopic 350-40 will be accounted for consistent with other licenses of intangible assets. The amendments are effective for public business entities for annual and interim periods within those annual periods, beginning after December 15, 2015. An entity can elect to adopt the amendments either (1) prospectively to all arrangements entered into or materially modified after the effective date or (2) retrospectively. For prospective transition, the only disclosure requirements at transition are the nature of and reason for the change in accounting principle, the transition method, and a qualitative description of the financial statement line items affected by the change. For retrospective transition, the disclosure requirements at transition include the requirements for prospective transition and quantitative information about the effects of the accounting change. The adoption of this guidance did not have a material effect on the Corporation's financial position or results of operations. FASB ASU 2015-2, Amendments to the Consolidation Analysis . The amendments in ASU 2015-02 affect reporting entities that are required to evaluate whether they should consolidate certain legal entities. All legal entities are subject to reevaluation under the revised consolidation model. These amendments modify the current accounting guidance to address limited partnerships and similar entities; certain investments funds, fees paid to a decision maker or service provider, and the impact of fee arrangements and related parties on the primary beneficiary determination. The amendments are effective for public business entities for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. A reporting entity may apply the amendments using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption. A reporting entity also may apply the amendments retrospectively. The adoption of this guidance did not 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 adoption of this guidance did not have a material effect on the Corporation's financial position or results of operations. Recently Issued Accounting Standards ASU 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing . This update amends the new revenue recognition guidance on accounting for licenses of intellectual property and identifying performance obligations. The amendments clarify how an entity should evaluate the nature of its promise in granting a license of intellectual property, which will determine whether it recognizes revenue over time or a point in time. The amendments also clarify when a promised good or service is separately identifiable, that is distinct within the context of the contract, and allow entities to disregard items that are immaterial in the context of a contract. The effective date and transition requirements for this update are the same as those of the new standard. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, with early adoption permitted, but not before December 15, 2016. The amendments can be adopted using either the full retrospective approach or a modified retrospective approach. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures. FASB ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting . The amendments in ASU 2016-09 simplify several aspects of accounting for employee share-based payments including income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Some areas of the simplification apply only to nonpublic entities. The new guidance will require all income tax effects of awards to be recognized as income tax expense or benefit in the income statement when the awards vest or are settled and additional paid in capital pools will be eliminated. The guidance requires companies to present excess tax benefits as an operating activity on the statement of cash flows rather than as a financing activity. Companies will be required to account for forfeitures of share-based payments by recognizing forfeitures of awards as they occur or estimating the number of awards expected to be forfeited and adjusting the estimate when it is likely to change, as currently required, through an accounting policy election. The guidance will increase the amount an employer can withhold to cover income taxes on awards and still qualify for the exception to liability classification for shares used to satisfy the employer's income tax withholding obligation. The guidance requires an employer to classify the cash paid to a tax authority when shares are withheld to satisfy its statutory income tax withholding obligation as a financing activity on the statement of cash flows. For public business entities, the amendments in this update are effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. Early adoption will be permitted in any interim or annual period for which financial statements have not yet been issued or have not been made available for issuance, however all of the guidance must be adopted in the same period. If early adoption is elected in an interim period, any adjustments should be reflected as of the beginning of the annual period that includes that interim period. The adoption of this guidance is not expected to have a material effect on the Corporation’s financial position or results of operations. FASB ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net). The amendments in ASU 2016-08 are intended to improve the operability and understandability of the implementation guidance by clarifying the following: how an entity should identify the unit of accounting for the principal versus agent evaluation; how the control principle applies to transactions, such as service arrangements; reframes the indicators to focus on a principal rather than an agent, removes the credit risk and commission indicators and clarifies the relationship between the control principle and the indicators; and revises the existing illustrative examples and adds new illustrative examples. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, with early adoption permitted, but not before December 15, 2016. The amendments can be adopted using either the full retrospective approach or a modified retrospective approach. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures. FASB ASU 2016-07, Investments—Equity Method and Joint Ventures (Topic 323) , The amendments in this update eliminate the requirement that when an investment qualifies for use of the equity method due to an increase in level of ownership or influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by step basis as if the equity method had been in effect during all previous periods that the investment had been held. For public business entities, the amendments in this update are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted. The amendments should be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures FASB ASU 2016-06, Derivatives and Hedging (Topic 815), Contingent Put and Call Options in Debt Instruments . The amendments in this update clarify the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. An entity performing the assessment under the amendments in this update is required to assess the embedded call (put) options solely in accordance with the four-step decision sequence. For public business entities, the amendments in this update are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. An entity should apply the amendments in this update on a modified retrospective basis to existing debt instruments as of the beginning of the fiscal year for which the amendments are effective. Early adoption is permitted, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures. FASB ASU 2016-05, Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on The amendments in ASU 2016-05 clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument under Topic 815 does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria (including those in paragraphs 815-20-35-14 through 35-18) continue to be met. For public business entities, the amendments in this update are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures. FASB ASU 2016-02, Leases (Topic 842), The amendments in ASU 2016-02 increase transparency and comparability by requiring a lessee to recognize assets and liabilities for operating and capital leases with lease terms of more than 12 months. Additional qualitative and quantitative requirements disclosures are required to provide additional information to better understand the amount, timing, and uncertainty of cash flows arising from leases. Lessor accounting will remain largely unchanged from current GAAP. For public business entities, the amendments in this update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures. FASB ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in this update supersede the guidance to classify equity securities with readily determinable fair values into different categories (that is, trading or available-for-sale) and require equity securities (including other ownership interests, such as partnerships, unincorporated joint ventures, and limited liability companies) to be measured at fair value with changes in the fair value recognized through net income. The amendments allow equity investments that do not have readily determinable fair values to be remeasured at fair value either upon the occurrence of an observable price change or upon identification of an impairment. The amendments also require enhanced disclosures about those investments. The amendments improve financial reporting by providing relevant information about an entity’s equity investments and reducing the number of items that are recognized in other comprehensive income. For public business entities, the amendments in this update are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The amendments should be applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The adoption of this 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 . In May 2014, the FASB issued new accounting guidance that revises the criteria for determining when to recognize revenue from contracts with customers and expands disclosure requirements. The amendments in this update supersede virtually all existing GAAP revenue recognition guidance, including most industry-specific revenue recognition guidance. 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. On July 9, 2015, the FASB decided to delay, by one year, the effective dates, permitting public entities to apply this guidance to annual reporting periods beginning after December 15, 2017, with early adoption permitted, but not before December 15, 2016. The amendments can be adopted using either the full retrospective approach or a modified retrospective approach. There are many aspects of this new accounting guidance that are still being interpreted, and the FASB has recently issued updates to certain aspects of the guidance as noted above. The Corporation is in process of assessing the potential impact the adoption of this guidance will have on its consolidated financial statements and related disclosures.
Investment Policy on Municipal Securities	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% .

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
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. March 31, 2016 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale Debt securities U.S. government agency debentures $ 2,500 $ 20 $ — $ 2,520 U.S. states and political subdivisions 169,281 3,894 (34 ) 173,141 Residential mortgage-backed securities: U.S. government agencies 889,511 18,398 (253 ) 907,656 Commercial mortgage-backed securities: U.S. government agencies 181,846 2,654 (252 ) 184,248 Residential collateralized mortgage-backed securities: U.S. government agencies 2,214,035 20,761 (8,059 ) 2,226,737 Non-agency 4 — — 4 Commercial collateralized mortgage-backed securities: U.S. government agencies 269,197 3,976 (291 ) 272,882 Asset-backed securities: Collateralized loan obligations 297,885 36 (12,524 ) 285,397 Corporate debt securities 61,724 — (12,968 ) 48,756 Total debt securities 4,085,983 49,739 (34,381 ) 4,101,341 Equity securities Marketable equity securities 2,873 — — 2,873 Total equity securities 2,873 — — 2,873 Total securities available-for-sale $ 4,088,856 $ 49,739 $ (34,381 ) $ 4,104,214 Securities held-to-maturity Debt securities U.S. government agency debentures $ 25,000 $ 26 $ — $ 25,026 U.S. states and political subdivisions 558,795 17,285 (262 ) 575,818 Residential mortgage-backed securities: U.S. government agencies 88,314 1,280 (266 ) 89,328 Commercial mortgage-backed securities: U.S. government agencies 489,216 10,159 (212 ) 499,163 Residential collateralized mortgage-backed securities: U.S. government agencies 1,113,901 2,414 (14,257 ) 1,102,058 Commercial collateralized mortgage-backed securities: U.S. government agencies 251,421 2,436 (934 ) 252,923 Corporate debt securities 87,053 905 — 87,958 Total securities held-to-maturity $ 2,613,700 $ 34,505 $ (15,931 ) $ 2,632,274 December 31, 2015 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale Debt securities U.S. treasury notes & bonds $ 5,001 $ — $ (1 ) $ 5,000 U.S. government agency debentures 2,500 — (2 ) 2,498 U.S. states and political subdivisions 188,829 4,170 (204 ) 192,795 Residential mortgage-backed securities: U.S. government agencies 900,358 11,325 (5,454 ) 906,229 Commercial mortgage-backed securities: U.S. government agencies 173,912 220 (2,023 ) 172,109 Residential collateralized mortgage-backed securities: U.S. government agencies 2,155,808 2,659 (30,147 ) 2,128,320 Non-agency 4 — — 4 Commercial collateralized mortgage-backed securities: U.S. government agencies 217,008 580 (1,269 ) 216,319 Asset-backed securities: Collateralized loan obligations 297,831 26 (8,446 ) 289,411 Corporate debt securities 61,710 — (9,481 ) 52,229 Total debt securities 4,002,961 18,980 (57,027 ) 3,964,914 Equity securities Marketable equity securities 2,821 — — 2,821 Total equity securities 2,821 — — 2,821 Total securities available-for-sale $ 4,005,782 $ 18,980 $ (57,027 ) $ 3,967,735 Securities held-to-maturity Debt securities U.S. government agency debentures 25,000 19 — 25,019 U.S. states and political subdivisions 571,738 22,180 (262 ) 593,656 Residential mortgage-backed securities: U.S. government agencies 507,908 4,767 (2,999 ) 509,676 Commercial mortgage-backed securities: U.S. government agencies 64,951 294 (574 ) 64,671 Residential collateralized mortgage-backed securities: U.S. government agencies 1,161,340 75 (35,881 ) 1,125,534 Commercial collateralized mortgage-backed securities: U.S. government agencies 255,359 676 (3,611 ) 252,424 Corporate debt securities 87,797 364 (22 ) 88,139 Total securities held-to-maturity $ 2,674,093 $ 28,375 $ (43,349 ) $ 2,659,119 March 31, 2015 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale Debt securities U.S. government agency debentures $ 2,500 $ 13 $ — $ 2,513 U.S. states and political subdivisions 208,800 6,750 (386 ) 215,164 Residential mortgage-backed securities: U.S. government agencies 924,453 24,799 (1,949 ) 947,303 Commercial mortgage-backed securities: U.S. government agencies 139,789 1,231 (661 ) 140,359 Residential collateralized mortgage-backed securities: U.S. government agencies 1,895,112 11,305 (13,857 ) 1,892,560 Non-agency 6 — — 6 Commercial collateralized mortgage-backed securities: U.S. government agencies 241,839 2,602 (382 ) 244,059 Asset-backed securities: Collateralized loan obligations 297,506 587 (4,131 ) 293,962 Corporate debt securities 61,668 — (9,404 ) 52,264 Total debt securities 3,771,673 47,287 (30,770 ) 3,788,190 Equity Securities Marketable equity securities 2,869 — — 2,869 Non-marketable equity securities — — — — Total equity securities 2,869 — — 2,869 Total securities available-for-sale $ 3,774,542 $ 47,287 $ (30,770 ) $ 3,791,059 Securities held-to-maturity Debt securities U.S. treasury notes & bonds $ 5,000 $ — $ — $ 5,000 U.S. government agency debentures 25,000 — (178 ) 24,822 U.S states and political subdivisions 523,501 8,864 (1,147 ) 531,218 Residential mortgage-backed securities: U.S. government agencies 577,278 10,745 (1,677 ) 586,346 Commercial mortgage-backed securities: U.S. government agencies 57,818 765 (108 ) 58,475 Residential collateralized mortgage-backed securities: U.S. government agencies 1,320,215 1,959 (24,846 ) 1,297,328 Commercial collateralized mortgage-backed securities: U.S. government agencies 256,352 1,659 (3,377 ) 254,634 Corporate debt securities 90,010 1,079 — 91,089 Total securities held-to-maturity $ 2,855,174 $ 25,071 $ (31,333 ) $ 2,848,912
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 11 of the 37 U.S. states in which it holds investments. (Dollars in thousands) March 31, 2016 U.S. State # of Issuers Average Issue Size, Fair Value Amortized Cost Fair Value Michigan 137 $ 1,364 $ 180,322 $ 186,935 Ohio 110 1,098 117,643 120,829 Wisconsin 61 615 36,369 37,528 Illinois 53 1,840 95,228 97,511 Texas 53 802 41,356 42,496 Pennsylvania 41 1,035 41,680 42,448 New Jersey 33 736 23,746 24,285 Washington 29 948 26,977 27,497 Minnesota 23 699 15,713 16,069 New York 18 617 10,819 11,104 Missouri 11 1,086 11,637 11,948 Other 107 756 79,847 80,899 Total general obligation bonds 676 $ 1,035 $ 681,337 $ 699,549 (Dollars in thousands) December 31, 2015 U.S. State # of Issuers Average Issue Size, Fair Value Amortized Cost Fair Value Michigan 137 $ 1,381 $ 180,508 $ 189,259 Ohio 111 1,091 116,783 121,117 Illinois 55 1,870 99,524 102,867 Texas 58 807 45,818 46,805 Wisconsin 69 673 44,794 46,454 Pennsylvania 42 1,020 42,185 42,835 Washington 29 950 27,080 27,548 New Jersey 35 725 24,810 25,372 Minnesota 33 667 21,679 22,020 Missouri 15 1,078 15,878 16,174 New York 18 635 11,161 11,422 Other 110 759 81,815 83,477 Total general obligation bonds 712 $ 1,033 $ 712,035 $ 735,350 (Dollars in thousands) March 31, 2015 U.S. State # of Issuers Average Issue Size, Fair Value Amortized Cost Fair Value Michigan 164 $ 857 $ 138,091 $ 140,620 Ohio 136 925 124,908 125,864 Illinois 62 1,841 111,649 114,150 Wisconsin 73 760 53,877 55,497 Texas 63 784 48,388 49,396 Pennsylvania 46 1,018 46,085 46,816 Washington 31 930 28,194 28,836 New Jersey 37 747 26,724 27,623 Minnesota 35 697 23,821 24,405 Missouri 15 1,098 16,032 16,472 New York 19 629 11,646 11,948 Other 121 639 76,127 77,365 Total general obligation bonds 802 $ 896 $ 705,542 $ 718,992
Other investments	FRB and FHLB stock constitutes the majority of other investments on the Consolidated Balance Sheets. (In thousands) March 31, 2016 December 31, 2015 March 31, 2015 FRB stock $ 56,083 $ 56,083 $ 55,681 FHLB stock 91,714 91,714 92,381 Other 362 375 413 Total other investments $ 148,159 $ 148,172 $ 148,475
Realized Gains and Losses	Three Months Ended March 31, (In thousands) 2016 2015 Realized gains $ 295 $ 392 Realized losses — (38 ) Net securities (losses)/gains $ 295 $ 354
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. March 31, 2016 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Number Impaired Securities Fair Value Unrealized Losses Number Securities Fair Value Unrealized Losses Securities available-for-sale Debt securities U.S. states and political subdivisions $ 2,880 $ (14 ) 6 $ 1,899 $ (20 ) 4 $ 4,779 $ (34 ) Residential mortgage-backed securities: U.S. government agencies 171 — 2 32,960 (253 ) 3 33,131 (253 ) Commercial mortgage-backed securities: U.S. government agencies — — 0 12,595 (252 ) 1 12,595 (252 ) Residential collateralized mortgage-backed securities: U.S. government agencies 96,691 (568 ) 6 552,785 (7,491 ) 46 649,476 (8,059 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 32,200 (107 ) 5 22,464 (184 ) 2 54,664 (291 ) Asset-backed securities: Collateralized loan obligations 149,999 (6,176 ) 27 121,596 (6,348 ) 15 271,595 (12,524 ) Corporate debt securities — — 0 48,755 (12,968 ) 8 48,755 (12,968 ) Total securities available-for-sale $ 281,941 $ (6,865 ) 46 $ 793,054 $ (27,516 ) 79 $ 1,074,995 $ (34,381 ) Securities held-to-maturity Debt securities U.S. government agency debentures $ — $ — 0 $ — $ — 0 $ — $ — U.S. states and political subdivisions 4,491 (21 ) 9 7,793 (241 ) 10 12,284 (262 ) Residential mortgage-backed securities: U.S. government agencies — — 0 62,997 (212 ) 4 62,997 (212 ) Commercial mortgage-backed securities: U.S. government agencies 13,268 (263 ) 1 9,438 (3 ) 1 22,706 (266 ) Residential collateralized mortgage-backed securities: U.S. government agencies — — 0 873,299 (14,257 ) 52 873,299 (14,257 ) Commercial collateralized mortgage-backed securities: U.S. government agencies — — 0 80,216 (934 ) 7 80,216 (934 ) Total securities held-to-maturity $ 17,759 $ (284 ) 10 $ 1,033,743 $ (15,647 ) 74 $ 1,051,502 $ (15,931 ) December 31, 2015 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Number Securities Fair Value Unrealized Losses Number Impaired Securities Fair Value Unrealized Losses Securities available-for-sale Debt securities U.S government agency debentures $ 2,498 $ (2 ) 1 $ — $ — 0 $ 2,498 $ (2 ) U.S. treasury notes and bonds 5,000 (1 ) 1 — — 0 5,000 (1 ) U.S. states and political subdivisions 10,178 (37 ) 20 5,899 (167 ) 9 16,077 (204 ) Residential mortgage-backed securities: U.S. government agencies 328,156 (3,026 ) 27 95,895 (2,428 ) 7 424,051 (5,454 ) Commercial mortgage-backed securities: U.S. government agencies 107,074 (1,447 ) 15 12,401 (576 ) 1 119,475 (2,023 ) Residential collateralized mortgage-backed securities: U.S. government agencies 1,130,779 (10,587 ) 78 597,403 (19,560 ) 49 1,728,182 (30,147 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 113,825 (893 ) 12 23,400 (376 ) 2 137,225 (1,269 ) Asset-backed securities: Collateralized loan obligations 151,810 (3,576 ) 26 126,422 (4,870 ) 15 278,232 (8,446 ) Corporate debt securities — — 0 52,229 (9,481 ) 8 52,229 (9,481 ) Total securities available-for-sale $ 1,849,320 $ (19,569 ) 180 $ 913,649 $ (37,458 ) 91 $ 2,762,969 $ (57,027 ) Securities held-to-maturity Debt securities U.S. states and political subdivisions $ 18,465 $ (224 ) 21 $ 4,174 $ (38 ) 6 $ 22,639 $ (262 ) Residential mortgage-backed securities: U.S. government agencies 85,738 (715 ) 6 97,880 (2,284 ) 6 183,618 (2,999 ) Commercial mortgage-backed securities: U.S. government agencies 34,833 (346 ) 6 9,269 (228 ) 1 44,102 (574 ) Residential collateralized mortgage-backed securities: U.S. government agencies 140,514 (1,225 ) 12 941,982 (34,656 ) 55 1,082,496 (35,881 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 71,812 (384 ) 7 117,992 (3,227 ) 11 189,804 (3,611 ) Corporate debt securities 19,243 (22 ) 6 — — 0 19,243 (22 ) Total securities held-to-maturity $ 370,605 $ (2,916 ) 58 $ 1,171,297 $ (40,433 ) 79 $ 1,541,902 $ (43,349 ) March 31, 2015 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Number Securities Fair Value Unrealized Losses Number Securities Fair Value Unrealized Losses Securities available-for-sale Debt securities U.S. states and political subdivisions $ 14,380 $ (117 ) 23 $ 6,004 $ (269 ) 10 $ 20,384 $ (386 ) Residential mortgage-backed securities: U.S. government agencies 74,517 (360 ) 5 108,052 (1,589 ) 8 182,569 (1,949 ) Commercial mortgage-backed securities: U.S. government agencies 49,129 (175 ) 7 17,690 (486 ) 2 66,819 (661 ) Residential collateralized mortgage-backed securities: U.S. government agencies 70,574 (762 ) 6 745,621 (13,095 ) 53 816,195 (13,857 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 13,206 (24 ) 2 61,132 (358 ) 6 74,338 (382 ) Asset-backed securities: Collateralized loan obligations 24,087 (209 ) 3 181,498 (3,922 ) 27 205,585 (4,131 ) Corporate debt securities — — 0 52,263 (9,404 ) 8 52,263 (9,404 ) Total securities available-for-sale $ 245,893 $ (1,647 ) 46 $ 1,172,260 $ (29,123 ) 114 $ 1,418,153 $ (30,770 ) Securities held-to-maturity Debt securities U.S. treasury notes & bonds $ 5,000 $ — 1 $ — $ — 0 $ 5,000 $ — U.S. government agency debentures — — 0 24,822 (178 ) 1 24,822 (178 ) U.S. states and political subdivisions 38,202 (1,093 ) 26 4,448 (54 ) 6 42,650 (1,147 ) Residential mortgage-backed securities: U.S. government agencies 28,386 (123 ) 2 110,329 (1,554 ) 6 138,715 (1,677 ) Commercial mortgage-backed securities: U.S. government agencies — — 0 9,554 (108 ) 1 9,554 (108 ) Residential collateralized mortgage-backed securities: U.S. government agencies 19,016 (71 ) 1 1,095,375 (24,775 ) 56 1,114,391 (24,846 ) Commercial collateralized mortgage-backed securities: U.S. government agencies — — 0 144,970 (3,377 ) 13 144,970 (3,377 ) Corporate debt securities — — 0 — — 0 — — Total securities held-to-maturity $ 90,604 $ (1,287 ) 30 $ 1,389,498 $ (30,046 ) 83 $ 1,480,102 $ (31,333 )
Investments Classified by Contractual Maturity Date	(Dollars in thousands) U.S. Government agency debentures U.S. States and political subdivisions Residential mortgage-backed securities - U.S. govt. agencies Commercial mortgage-backed securities - U.S. govt. agencies Residential collateralized mortgage obligations - U.S. govt. agencies Residential collateralized mortgage obligations - non-agency Commercial collateralized mortgage obligations - U.S. govt. agencies Asset backed securities - collateralized loan obligations Corporate debt securities Total Weighted Average Yield Securities Available-for-Sale Remaining maturity: One year or less $ — $ 7,120 $ 119 $ — $ — $ — $ — $ — $ — $ 7,239 3.29 % Over one year through five years 2,520 79,686 61,444 32,937 16,015 3 15,653 — — 208,258 3.80 % Over five years through ten years — 66,049 52,312 122,070 11,655 — 110,696 204,643 — 567,425 3.06 % Over ten years — 20,286 793,781 29,241 2,199,067 1 146,533 80,754 48,756 3,318,419 2.11 % Fair Value $ 2,520 $ 173,141 $ 907,656 $ 184,248 $ 2,226,737 $ 4 $ 272,882 $ 285,397 $ 48,756 $ 4,101,341 2.33 % Amortized Cost $ 2,500 $ 169,281 $ 889,511 $ 181,846 $ 2,214,035 $ 4 $ 269,197 $ 297,885 $ 61,724 $ 4,085,983 Weighted-Average Yield 1.25 % 5.17 % 2.40 % 2.15 % 2.04 % 2.60 % 2.21 % 3.07 % 1.34 % 2.33 % Weighted-Average Maturity (in years) 2.17 1.96 3.38 4.24 3.44 0.60 4.09 6.51 11.56 3.79 Securities Held-to-Maturity Remaining maturity: One year or less $ — $ 65,484 $ — $ — $ — $ — $ — $ — $ 22,609 $ 88,093 2.21 % Over one year through five years 25,026 157,086 36,437 — — — 81,282 — 65,349 365,180 2.45 % Over five years through ten years — 202,251 52,891 22,567 — — 40,984 — — 318,693 3.83 % Over ten years — 150,997 — 476,596 1,102,058 — 130,657 — — 1,860,308 2.07 % Fair Value $ 25,026 $ 575,818 $ 89,328 $ 499,163 $ 1,102,058 $ — $ 252,923 $ — $ 87,958 $ 2,632,274 2.34 % Amortized Cost $ 25,000 $ 558,795 $ 88,314 $ 489,216 $ 1,113,901 $ — $ 251,421 $ — $ 87,053 $ 2,613,700 Weighted-Average Yield 1.43 % 4.22 % 2.02 % 2.15 % 1.60 % — % 2.00 % — % 2.26 % 2.34 % Weighted-Average Maturity (in years) 0.08 4.61 3.36 3.57 3.45 — 3.85 — 1.77 3.67

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2016
Loans and Leases Receivable Disclosure [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	Loans outstanding as of March 31, 2016 , December 31, 2015 , and March 31, 2015 , net of unearned income, consisted of the following: (In thousands) March 31, 2016 December 31, 2015 March 31, 2015 Originated loans: Commercial $ 9,100,731 $ 9,007,830 $ 8,420,765 Residential mortgage 700,138 689,045 639,980 Installment 3,154,912 2,990,349 2,500,288 Home equity 1,254,709 1,248,438 1,134,238 Credit cards 179,023 182,843 160,766 Total originated loans 14,389,513 14,118,505 12,856,037 Allowance for originated loan losses (102,915 ) (105,135 ) (97,545 ) Net originated loans $ 14,286,598 $ 14,013,370 $ 12,758,492 Acquired loans: Commercial $ 628,030 $ 677,149 $ 1,011,170 Residential mortgage 308,618 324,008 378,192 Installment 539,313 573,372 717,693 Home equity 157,745 168,542 217,824 Total acquired loans 1,633,706 1,743,071 2,324,879 Allowance for acquired loan losses (4,423 ) (3,877 ) (7,493 ) Net acquired loans $ 1,629,283 $ 1,739,194 $ 2,317,386 FDIC acquired loans: Commercial $ 122,123 $ 129,109 $ 179,547 Residential mortgage 34,594 35,568 40,470 Installment 1,942 2,077 4,781 Home equity 34,136 38,668 65,170 Loss share receivable 9,436 9,947 20,005 Total FDIC acquired loans 202,231 215,369 309,973 Allowance for FDIC acquired loan losses (44,599 ) (44,679 ) (41,514 ) Net FDIC acquired loans $ 157,632 $ 170,690 $ 268,459 Total loans: Commercial $ 9,850,884 $ 9,814,088 $ 9,611,482 Residential mortgage 1,043,350 1,048,621 1,058,642 Installment 3,696,167 3,565,798 3,222,762 Home equity 1,446,590 1,455,648 1,417,232 Credit cards 179,023 182,843 160,766 Loss share receivable 9,436 9,947 20,005 Total loans 16,225,450 16,076,945 15,490,889 Total allowance for loan losses (151,937 ) (153,691 ) (146,552 ) Total Net loans $ 16,073,513 $ 15,923,254 $ 15,344,337
Changes in Carrying Amount of Accretable Yield for Acquired Impaired Loans	Total outstanding acquired impaired loans as of March 31, 2016 and 2015 were $370.6 million and $548.2 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 months ended March 31, 2016 and 2015 : Three Months Ended March 31, Acquired Impaired Loans 2016 2015 (In thousands) Accretable Yield Carrying Amount of Loans Accretable Yield Carrying Amount of Loans Balance at beginning of period $ 89,823 $ 284,709 $ 119,450 $ 423,209 Accretion (8,902 ) 8,902 (11,218 ) 11,218 Net reclassifications from nonaccretable to accretable 7,753 — 12,995 — Payments received, net — (36,459 ) — (46,114 ) Disposals (3,230 ) — (2,471 ) — Balance at end of period $ 85,444 $ 257,152 $ 118,756 $ 388,313
Changes in Loss Share Receivable Associated with Covered Loans	Changes in the loss share receivable for the three months ended March 31, 2016 and 2015 were as follows: Loss Share Receivable Three Months Ended March 31, (In thousands) 2016 2015 Balance at beginning of period $ 9,947 $ 22,033 Amortization (348 ) (2,187 ) Increase/(decrease) due to impairment (recapture) on FDIC acquired loans 269 4,227 FDIC reimbursement (192 ) (4,013 ) FDIC acquired loans paid in full (240 ) (55 ) Balance at end of the period (1) $ 9,436 $ 20,005 (1) As of March 31, 2016 , the loss share receivable of $9.4 million was related to single family covered loans.
Changes in Carrying Amount of Accretable Yield for Covered Impaired Loans	Total outstanding FDIC acquired impaired loans were $306.6 million and $404.4 million as of March 31, 2016 and 2015 , 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 FDIC acquired impaired loans were as follows for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, FDIC Acquired Impaired Loans 2016 2015 (In thousands) Accretable Yield Carrying Loans Accretable Yield Carrying Loans Balance at beginning of period $ 22,908 $ 130,648 $ 37,511 $ 232,452 Accretion (2,297 ) 2,297 (5,567 ) 5,567 Net reclassifications between non-accretable and accretable 1,673 — (56 ) — Payments received, net — (10,811 ) — (38,794 ) (Disposals)/Additions (158 ) — (2,021 ) — Balance at end of period $ 22,126 $ 122,134 $ 29,867 $ 199,225 The cash flows expected to be collected on covered impaired loans are estimated quarterly in a similar manner as described above for acquired impaired loans. During the quarter ended March 31, 2016 , the re-estimation process resulted in a net reclassification of $1.7 million from the nonaccretable difference to accretable yield. This reclassification was $0.1 million for the three months ended March 31, 2015 . The reclassification from the nonaccretable difference to the accretable yield results in prospective yield adjustments on the loan pools.
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 March 31, 2016 (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 (1) Loans Commercial C&I $ 2,485 $ 3,464 $ 8,627 $ 14,576 $ 5,822,739 $ 5,837,315 $ 274 $ 35,500 CRE 3,211 1,137 17,024 21,372 2,058,290 2,079,662 2,420 18,216 Construction 6,891 — 485 7,376 663,449 670,825 — 3,010 Leases — — — — 512,929 512,929 — — Consumer Installment 13,150 2,591 3,567 19,308 3,135,604 3,154,912 3,178 2,554 Home Equity Lines 1,100 897 1,757 3,754 1,250,955 1,254,709 274 2,267 Credit Cards 857 483 843 2,183 176,840 179,023 339 554 Residential Mortgages 11,278 1,544 6,801 19,623 680,515 700,138 2,876 11,600 Total $ 38,972 $ 10,116 $ 39,104 $ 88,192 $ 14,301,321 $ 14,389,513 $ 9,361 $ 73,701 Acquired Loans ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ 1,092 $ 75 $ 1,729 $ 2,896 $ 227,804 $ 230,700 $ 145 $ 766 CRE 2,580 918 10,561 14,059 377,804 391,863 — 4,332 Construction — — 718 718 4,749 5,467 — — Consumer Installment 3,869 793 633 5,295 534,018 539,313 289 600 Home Equity Lines 1,002 120 470 1,592 156,153 157,745 260 320 Residential Mortgages 9,244 49 4,515 13,808 294,810 308,618 1,018 980 Total $ 17,787 $ 1,955 $ 18,626 $ 38,368 $ 1,595,338 $ 1,633,706 $ 1,712 $ 6,998 FDIC Acquired Loans (2) ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ — $ — $ 949 $ 949 $ 30,981 $ 31,930 n/a n/a CRE 288 344 27,699 28,331 56,973 85,304 n/a n/a Construction — — 3,133 3,133 1,756 4,889 n/a n/a Consumer Installment — — — — 1,942 1,942 n/a n/a Home Equity Lines 1,969 46 1,693 3,708 30,428 34,136 n/a n/a Residential Mortgages 4,490 167 2,582 7,239 27,355 34,594 n/a n/a Total $ 6,747 $ 557 $ 36,056 $ 43,360 $ 149,435 $ 192,795 n/a n/a (1) Installment loans 90 days or more past due and accruing include $2.3 million of loans guaranteed by the U.S. government as of March 31, 2016 . (2) Excludes loss share receivable of $9.4 million as of March 31, 2016 . (3) Acquired and FDIC acquired impaired loans were not classified as nonperforming assets at March 31, 2016 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 FDIC acquired impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and FDIC acquired impaired loans. As of December 31, 2015 (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 (1) Loans Commercial C&I $ 4,684 $ 115 $ 8,824 $ 13,623 $ 5,779,785 $ 5,793,408 $ 236 $ 23,123 CRE 12,880 — 2,260 15,140 2,062,204 2,077,344 153 4,503 Construction 1,360 — 486 1,846 643,491 645,337 — 482 Leases — — — — 491,741 491,741 — — Consumer Installment 17,934 4,828 3,920 26,682 2,963,667 2,990,349 3,519 2,178 Home Equity Lines 1,952 913 1,478 4,343 1,244,095 1,248,438 513 1,674 Credit Cards 1,449 494 632 2,575 180,268 182,843 725 545 Residential Mortgages 11,099 1,519 6,693 19,311 669,734 689,045 2,876 11,600 Total $ 51,358 $ 7,869 $ 24,293 $ 83,520 $ 14,034,985 $ 14,118,505 $ 8,022 $ 44,105 Acquired Loans ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ 311 $ 31 $ 3,336 $ 3,678 $ 236,467 $ 240,145 $ 13 $ 782 CRE 3,192 1,681 9,657 14,530 416,361 430,891 522 4,948 Construction — — 733 733 5,380 6,113 — — Consumer Installment 5,059 1,329 974 7,362 566,010 573,372 236 835 Home Equity Lines 1,365 660 1,260 3,285 165,257 168,542 644 514 Residential Mortgages 8,760 567 6,792 16,119 307,889 324,008 1,681 1,166 Total $ 18,687 $ 4,268 $ 22,752 $ 45,707 $ 1,697,364 $ 1,743,071 $ 3,096 $ 8,245 FDIC Acquired Loans (2) ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ — $ — $ 1,054 $ 1,054 $ 34,412 $ 35,466 n/a n/a CRE 296 354 28,501 29,151 58,623 87,774 n/a n/a Construction — — 3,761 3,761 2,108 5,869 n/a n/a Consumer Installment — — — — 2,077 2,077 n/a n/a Home Equity Lines 2,230 52 1,917 4,199 34,469 38,668 n/a n/a Residential Mortgages 4,616 172 2,655 7,443 28,125 35,568 n/a n/a Total $ 7,142 $ 578 $ 37,888 $ 45,608 $ 159,814 $ 205,422 n/a n/a (1) Installment loans 90 days or more past due and accruing include $2.3 million of loans guaranteed by the U.S. government as of December 31, 2015 . (2) Excludes loss share receivable of $9.9 million as of December 31, 2015 . (3) Acquired and FDIC acquired impaired loans were not classified as nonperforming assets at December 31, 2015 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 FDIC acquired impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and FDIC acquired impaired loans. As of March 31, 2015 (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 (1) Loans Commercial C&I $ 525 $ 515 $ 5,846 $ 6,886 $ 5,311,011 $ 5,317,897 $ 498 $ 18,838 CRE 4,401 1,177 3,481 9,059 2,123,958 2,133,017 150 9,640 Construction — — — — 580,978 580,978 — — Leases 255 — — 255 388,618 388,873 — — Consumer Installment 11,294 3,215 4,157 18,666 2,481,622 2,500,288 3,332 3,016 Home Equity Lines 1,480 323 1,395 3,198 1,131,040 1,134,238 622 1,780 Credit Cards 654 301 637 1,592 159,174 160,766 312 523 Residential Mortgages 9,236 2,515 7,402 19,153 620,827 639,980 3,000 12,288 Total $ 27,845 $ 8,046 $ 22,918 $ 58,809 $ 12,797,228 $ 12,856,037 $ 7,914 $ 46,085 Acquired Loans ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ 66 $ 131 $ 5,366 $ 5,563 $ 415,247 $ 420,810 $ 44 $ 700 CRE 4,507 1,380 23,420 29,307 554,765 584,072 252 4,172 Construction — — 676 676 5,612 6,288 — — Consumer Installment 4,859 1,322 1,121 7,302 710,391 717,693 521 746 Home Equity Lines 2,850 1,544 1,172 5,566 212,258 217,824 462 639 Residential Mortgages 9,894 590 5,250 15,734 362,458 378,192 425 997 Total $ 22,176 $ 4,967 $ 37,005 $ 64,148 $ 2,260,731 $ 2,324,879 $ 1,704 $ 7,254 FDIC Acquired Loans (2) ≥ 90 Days Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans (3) Commercial C&I $ 815 $ 144 $ 4,566 $ 5,525 $ 37,289 $ 42,814 n/a n/a CRE 413 5,218 44,023 49,654 78,254 127,908 n/a n/a Construction — — 6,906 6,906 1,919 8,825 n/a n/a Consumer Installment — 110 — 110 4,671 4,781 n/a n/a Home Equity Lines 2,291 564 3,651 6,506 58,664 65,170 n/a n/a Residential Mortgages 5,714 163 3,684 9,561 30,909 40,470 n/a n/a Total $ 9,233 $ 6,199 $ 62,830 $ 78,262 $ 211,706 $ 289,968 n/a n/a (1) Installment loans 90 days or more past due and accruing include $2.4 million of loans guaranteed by the U.S. government as of March 31, 2015 . (2) Excludes loss share receivable of $20.0 million as of March 31, 2015 . (3) Acquired and FDIC acquired impaired loans were not classified as nonperforming assets at March 31, 2015 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 FDIC acquired impaired loans. These asset quality disclosures are, therefore, not applicable to acquired and FDIC acquired 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 March 31, 2016 (In thousands) Originated Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 68,185 $ 757 $ — $ 12,613 $ 81,555 Grade 2 397,855 818 — 43,507 442,180 Grade 3 1,317,058 310,816 52,039 80,042 1,759,955 Grade 4 3,762,793 1,719,833 597,571 336,402 6,416,599 Grade 5 141,456 9,924 2,401 32,416 186,197 Grade 6 146,380 37,514 18,814 7,949 210,657 Grade 7 3,588 — — — 3,588 Total $ 5,837,315 $ 2,079,662 $ 670,825 $ 512,929 $ 9,100,731 Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ — $ — $ — $ — $ — Grade 2 596 615 — — 1,211 Grade 3 27,818 23,221 — — 51,039 Grade 4 169,906 327,406 4,749 — 502,061 Grade 5 24,577 11,663 — — 36,240 Grade 6 7,803 28,958 718 — 37,479 Grade 7 — — — — — Total $ 230,700 $ 391,863 $ 5,467 $ — $ 628,030 FDIC Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ — $ — $ — $ — $ — Grade 2 965 — — — 965 Grade 3 — 6,807 — — 6,807 Grade 4 28,483 48,512 682 — 77,677 Grade 5 266 — — — 266 Grade 6 2,216 29,985 4,207 — 36,408 Grade 7 — — — — — Total $ 31,930 $ 85,304 $ 4,889 $ — $ 122,123 As of December 31, 2015 (In thousands) Originated Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 60,440 $ 773 $ — $ 12,732 $ 73,945 Grade 2 353,581 831 — 69,258 423,670 Grade 3 1,371,850 319,987 59,182 49,956 1,800,975 Grade 4 3,756,333 1,697,261 569,098 344,763 6,367,455 Grade 5 124,140 18,388 7,193 7,858 157,579 Grade 6 124,483 40,105 9,864 7,174 181,626 Grade 7 2,581 (1 ) — — 2,580 Total $ 5,793,408 $ 2,077,344 $ 645,337 $ 491,741 $ 9,007,830 Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 346 $ — $ — $ — $ 346 Grade 2 — — — — — Grade 3 15,548 27,387 — — 42,935 Grade 4 200,736 361,518 5,380 — 567,634 Grade 5 11,735 12,546 — — 24,281 Grade 6 11,780 29,440 733 — 41,953 Grade 7 — — — — — Total $ 240,145 $ 430,891 $ 6,113 $ — $ 677,149 FDIC Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ — $ — $ — $ — $ — Grade 2 1,072 — — — 1,072 Grade 3 — 7,004 — — 7,004 Grade 4 31,637 49,917 819 — 82,373 Grade 5 295 — — — 295 Grade 6 2,462 30,853 5,050 — 38,365 Grade 7 — — — — — Total $ 35,466 $ 87,774 $ 5,869 $ — $ 129,109 As of March 31, 2015 (In thousands) Originated Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 59,380 $ 667 $ — $ 13,052 $ 73,099 Grade 2 191,008 3,368 — 5,782 200,158 Grade 3 1,405,007 339,027 62,821 69,686 1,876,541 Grade 4 3,504,600 1,724,516 516,852 297,790 6,043,758 Grade 5 103,432 29,034 942 1,307 134,715 Grade 6 54,470 36,405 363 1,256 92,494 Grade 7 — — — — — Total $ 5,317,897 $ 2,133,017 $ 580,978 $ 388,873 $ 8,420,765 Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 1,069 $ — $ — $ — $ 1,069 Grade 2 — — — — — Grade 3 22,875 24,834 — — 47,709 Grade 4 359,751 496,213 5,612 — 861,576 Grade 5 15,363 21,487 — — 36,850 Grade 6 21,752 41,538 676 — 63,966 Grade 7 — — — — — Total $ 420,810 $ 584,072 $ 6,288 $ — $ 1,011,170 FDIC Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ — $ — $ — $ — $ — Grade 2 1,040 — — — 1,040 Grade 3 — — — — — Grade 4 33,352 74,128 579 — 108,059 Grade 5 39 2,134 — — 2,173 Grade 6 8,383 51,646 8,246 — 68,275 Grade 7 — — — — — Total $ 42,814 $ 127,908 $ 8,825 $ — $ 179,547

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2016
Loans and Leases Receivable Disclosure [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 months ended March 31, 2016 and 2015 , as well as the corresponding recorded investment in originated loans at the end of the period: As of March 31, 2016 (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 $ 44,760 $ 9,631 $ 1,594 $ 1,313 $ 14,183 $ 20,094 $ 8,831 $ 4,729 $ 105,135 Charge-offs (3,209 ) (109 ) — — (6,769 ) (1,027 ) (1,450 ) (450 ) (13,014 ) Recoveries 532 24 2 19 3,806 624 357 20 5,384 Provision for loan losses 2,406 (2,302 ) (59 ) 167 3,444 (163 ) 853 1,064 5,410 Allowance for originated loan losses, ending balance $ 44,489 $ 7,244 $ 1,537 $ 1,499 $ 14,664 $ 19,528 $ 8,591 $ 5,363 $ 102,915 Ending allowance for originated loan losses balance attributable to loans: Individually evaluated for impairment $ 6,194 $ 567 $ — $ — $ 1,081 $ 185 $ 225 $ 1,038 $ 9,290 Collectively evaluated for impairment 38,295 6,677 1,537 1,499 13,583 19,343 8,366 4,325 93,625 Total ending allowance for originated loan losses balance $ 44,489 $ 7,244 $ 1,537 $ 1,499 $ 14,664 $ 19,528 $ 8,591 $ 5,363 $ 102,915 Originated loans: Originated loans individually evaluated for impairment $ 46,996 $ 24,013 $ — $ — $ 40,134 $ 7,720 $ 687 $ 23,105 $ 142,655 Originated loans collectively evaluated for impairment 5,790,319 2,055,649 670,825 512,929 3,114,778 1,246,989 178,336 677,033 14,246,858 Total ending originated loan balance $ 5,837,315 $ 2,079,662 $ 670,825 $ 512,929 $ 3,154,912 $ 1,254,709 $ 179,023 $ 700,138 $ 14,389,513 As of March 31, 2015 (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 $ 37,375 $ 10,492 $ 2,202 $ 674 $ 12,918 $ 19,324 $ 7,966 $ 4,745 $ 95,696 Charge-offs (510 ) (215 ) — — (5,055 ) (911 ) (1,452 ) (424 ) (8,567 ) Recoveries 341 — 1 4 3,020 613 366 35 4,380 Provision for loan losses 2,632 (1,464 ) (451 ) (49 ) 2,475 407 921 1,565 6,036 Allowance for originated loan losses, ending balance $ 39,838 $ 8,813 $ 1,752 $ 629 $ 13,358 $ 19,433 $ 7,801 $ 5,921 $ 97,545 Ending allowance for originated loan losses balance attributable to loans: Individually evaluated for impairment $ 10,042 $ 317 $ — $ — $ 1,005 $ 254 $ 263 $ 1,416 $ 13,297 Collectively evaluated for impairment 29,796 8,496 1,752 629 12,353 19,179 7,538 4,505 84,248 Total ending allowance for originated loan losses balance $ 39,838 $ 8,813 $ 1,752 $ 629 $ 13,358 $ 19,433 $ 7,801 $ 5,921 $ 97,545 Originated loans: Originated loans individually evaluated for impairment $ 35,792 $ 15,000 $ — $ — $ 26,882 $ 7,632 $ 815 $ 24,822 $ 110,943 Originated loans collectively evaluated for impairment 5,282,105 2,118,017 580,978 388,873 2,473,406 1,126,606 159,951 615,158 12,745,094 Total ending originated loan balance $ 5,317,897 $ 2,133,017 $ 580,978 $ 388,873 $ 2,500,288 $ 1,134,238 $ 160,766 $ 639,980 $ 12,856,037 The following table presents the originated ALL and the recorded investment as of December 31, 2015 : As of December 31, 2015 (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 $ 11,837 $ 128 $ — $ — $ 1,009 $ 188 $ 243 $ 944 $ 14,349 Collectively evaluated for impairment 32,923 9,503 1,594 1,313 13,174 19,906 8,588 3,785 90,786 Total ending allowance for originated loan losses balance $ 44,760 $ 9,631 $ 1,594 $ 1,313 $ 14,183 $ 20,094 $ 8,831 $ 4,729 $ 105,135 Originated loans: Loans individually evaluated for impairment $ 43,818 $ 16,614 $ — $ — $ 36,904 $ 7,080 $ 717 $ 23,905 $ 129,038 Loans collectively evaluated for impairment 5,749,590 2,060,730 645,337 491,741 2,953,445 1,241,358 182,126 665,140 13,989,467 Total ending originated loan balance $ 5,793,408 $ 2,077,344 $ 645,337 $ 491,741 $ 2,990,349 $ 1,248,438 $ 182,843 $ 689,045 $ 14,118,505
Allowance for acquired impaired loan losses	The following table presents activity in the allowance for acquired impaired loan losses for the three months ended March 31, 2016 and 2015 : Allowance for Acquired Impaired Loan Losses Three Months Ended March 31, (In thousands) 2016 2015 Balance at beginning of the period $ 3,877 $ 7,457 Charge-offs — — Recoveries — — Provision/(recapture) for loan losses 546 36 Balance at end of the period $ 4,423 $ 7,493
Schedule of Credit Losses for Financing Receivables, Current	The following table presents activity in the allowance for FDIC acquired impaired loan losses for the three months ended March 31, 2016 and 2015 : Allowance for FDIC acquired Impaired Loan Losses Three Months Ended March 31, (In thousands) 2016 2015 Balance at beginning of the period $ 44,679 $ 40,496 Net provision/(recapture) of loan losses before benefit attributable to FDIC loss share agreements 1,537 4,225 Net (benefit)/recapture attributable to FDIC loss share agreements (269 ) (4,227 ) Net provision/(recapture) for loan losses 1,268 (2 ) Increase/(decrease) in loss share receivable 269 4,227 Loans charged-off (1,617 ) (3,207 ) Balance at end of the period $ 44,599 $ 41,514
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 March 31, 2016 Originated Loans Unpaid Average Recorded Principal Related Recorded (In thousands) Investment Balance Allowance Investment Impaired loans with no related allowance Commercial C&I $ 32,520 $ 38,568 $ — $ 30,827 CRE 20,598 22,604 — 13,776 Construction — — — — Leases — — — — Consumer Installment 1,236 1,493 — 1,162 Home equity line 481 738 — 751 Credit card 13 13 — 20 Residential mortgages 11,184 13,562 — 11,775 Subtotal 66,032 76,978 — 58,311 Impaired loans with a related allowance Commercial C&I 14,476 14,617 6,194 14,117 CRE 3,415 3,447 567 2,435 Construction — — — — Leases — — — — Consumer Installment 38,898 39,013 1,081 32,499 Home equity line 7,239 7,239 185 6,699 Credit card 674 674 225 725 Residential mortgages 11,921 12,036 1,038 12,394 Subtotal 76,623 77,026 9,290 68,869 Total impaired loans $ 142,655 $ 154,004 $ 9,290 $ 127,180 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, 2015 Originated Loans Unpaid Average Recorded Principal Related Recorded (In thousands) Investment Balance Allowance Investment Impaired loans with no related allowance Commercial C&I $ 21,066 $ 23,854 $ — $ 27,215 CRE 15,465 17,456 — 13,031 Construction — — — — Consumer Installment 1,369 1,658 — 1,807 Home equity line 670 919 — 999 Credit card 21 21 — 20 Residential mortgages 11,550 13,901 — 11,979 Subtotal 50,141 57,809 — 55,051 Impaired loans with a related allowance Commercial C&I 22,752 28,881 11,837 11,284 CRE 1,149 1,173 128 3,037 Construction — — — — Consumer Installment 35,535 35,592 1,009 28,808 Home equity line 6,410 6,411 188 6,382 Credit card 696 696 243 757 Residential mortgages 12,355 12,458 944 12,619 Subtotal 78,897 85,211 14,349 62,887 Total impaired loans $ 129,038 $ 143,020 $ 14,349 $ 117,938 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 March 31, 2015 Originated Loans Unpaid Average Recorded Principal Related Recorded (In thousands) Investment Balance Allowance Investment Impaired loans with no related allowance Commercial C&I $ 28,513 $ 35,307 $ — $ 25,006 CRE 9,343 15,478 — 9,634 Construction — — — — Consumer Installment 1,846 2,428 — 1,881 Home equity line 977 1,222 — 987 Credit card 21 21 — 23 Residential mortgages 12,424 15,125 — 12,488 Subtotal 53,124 69,581 — 50,019 Impaired loans with a related allowance Commercial C&I 7,279 7,350 10,042 5,984 CRE 5,657 5,664 317 5,668 Construction — — — — Consumer Installment 25,036 25,100 1,005 24,181 Home equity line 6,655 6,655 254 6,715 Credit card 794 794 263 823 Residential mortgages 12,398 12,487 1,416 12,414 Subtotal 57,819 58,050 13,297 55,785 Total impaired loans $ 110,943 $ 127,631 $ 13,297 $ 105,804 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 March 31, 2016 , December 31, 2015 , and March 31, 2015 . As of March 31, 2016 (Dollars in thousands) Number of Loans Recorded Investment Unpaid Principal Balance Originated loans Commercial C&I 27 $ 28,160 $ 28,980 CRE 22 14,175 16,141 Construction — — — Total originated commercial 49 42,335 45,121 Consumer Installment 1,224 40,134 40,506 Home equity lines 253 7,720 7,977 Credit card 201 687 687 Residential mortgages 307 23,105 25,598 Total originated consumer 1,985 71,646 74,768 Total originated loans 2,034 $ 113,981 $ 119,889 Acquired loans Commercial C&I — $ — $ — CRE 5 3,525 3,827 Construction — — — Total acquired commercial 5 3,525 3,827 Consumer Installment 50 1,317 1,384 Home equity lines 171 7,508 7,572 Residential mortgages 31 2,050 2,277 Total acquired consumer 252 10,875 11,233 Total acquired loans 257 $ 14,400 $ 15,060 FDIC acquired loans Commercial C&I — $ — $ — CRE 3 13,176 11,466 Construction 1 580 677 Total FDIC acquired commercial 4 13,756 12,143 Consumer Home equity lines 76 9,627 9,642 Residential mortgages — — — Total FDIC acquired consumer 76 9,627 9,642 Total FDIC acquired loans 80 $ 23,383 $ 21,785 Total loans Commercial C&I 27 $ 28,160 $ 28,980 CRE 30 30,876 31,434 Construction 1 580 677 Total commercial 58 59,616 61,091 Consumer Installment 1,274 41,451 41,890 Home equity lines 500 24,855 25,191 Credit card 201 687 687 Residential mortgages 338 25,155 27,875 Total consumer 2,313 92,148 95,643 Total loans 2,371 $ 151,764 $ 156,734 Note 1: For originated loans, the differences between the recorded investment and unpaid principal balance amounts represent partial charge offs. Note 2: For acquired and FDIC acquired loans, the differences between the recorded investment and unpaid principal balance amounts represent partial charge offs and remaining purchase discount. As of December 31, 2015 (Dollars in thousands) Number of Loans Recorded Investment Unpaid Principal Balance Originated loans Commercial C&I 26 $ 33,087 $ 33,740 CRE 24 14,671 16,648 Construction — — — Total originated commercial 50 47,758 50,388 Consumer Installment 1,223 36,904 37,250 Home equity lines 257 7,080 7,330 Credit card 212 717 717 Residential mortgages 312 23,905 26,359 Total originated consumer 2,004 68,606 71,656 Total originated loans 2,054 $ 116,364 $ 122,044 Acquired loans Commercial C&I 1 7,611 7,611 CRE 3 918 1,044 Total acquired commercial 4 8,529 8,655 Consumer Installment 51 1,117 1,211 Home equity lines 176 7,718 7,778 Residential mortgages 31 2,154 2,382 Total acquired consumer 258 10,989 11,371 Total acquired loans 262 $ 19,518 $ 20,026 FDIC acquired loans Commercial C&I — $ — $ — CRE 3 14,056 12,479 Construction 1 593 682 Total FDIC acquired commercial 4 14,649 13,161 Consumer Home equity lines 81 10,215 10,281 Residential Mortgages 1 182 182 Total FDIC acquired consumer 82 10,397 10,463 Total FDIC acquired loans 86 $ 25,046 $ 23,624 Total loans Commercial C&I 27 $ 40,698 $ 41,351 CRE 30 29,645 30,171 Construction 1 593 682 Total commercial 58 70,936 72,204 Consumer Installment 1,274 38,021 38,461 Home equity lines 514 25,013 25,389 Credit card 212 717 717 Residential mortgages 344 26,241 28,923 Total consumer 2,344 89,992 93,490 Total loans 2,402 $ 160,928 $ 165,694 Note 1: For originated loans, the differences between the recorded investment and unpaid principal balance amounts represent partial charge offs. Note 2: For acquired and FDIC acquired loans, the differences between the recorded investment and unpaid principal balance amounts represent partial charge offs and remaining purchase discount. As of March 31, 2015 (Dollars in thousands) Number of Loans Recorded Investment Unpaid Principal Balance Originated loans Commercial C&I 47 $ 16,923 $ 23,666 CRE 64 12,076 17,325 Construction 31 — — Total originated commercial 142 28,999 40,991 Consumer Installment 1,186 26,882 27,528 Home equity lines 276 7,632 7,877 Credit card 230 815 815 Residential mortgages 316 24,822 27,612 Total originated consumer 2,008 60,151 63,832 Total originated loans 2,150 $ 89,150 $ 104,823 Acquired loans Commercial C&I 1 2 3 CRE 3 2,453 2,635 Total acquired commercial 4 2,455 2,638 Consumer Installment 51 1,195 1,281 Home equity lines 162 7,310 7,370 Residential mortgages 30 2,186 2,403 Total acquired consumer 243 10,691 11,054 Total acquired loans 247 $ 13,146 $ 13,692 FDIC acquired loans Commercial C&I 8 $ — $ 1,355 CRE 24 23,895 39,596 Construction 9 346 9,552 Total FDIC acquired commercial 41 24,241 50,503 Consumer Home equity lines 70 8,909 8,914 Residential mortgages 1 185 185 Total FDIC acquired consumer 71 9,094 9,099 Total FDIC acquired loans 112 $ 33,335 $ 59,602 Total loans Commercial C&I 56 $ 16,925 $ 25,024 CRE 91 38,424 59,556 Construction 40 346 9,552 Total commercial 187 55,695 94,132 Consumer Installment 1,237 28,077 28,809 Home equity lines 508 23,851 24,161 Credit card 230 815 815 Residential mortgages 347 27,193 30,200 Total consumer 2,322 79,936 83,985 Total loans 2,509 $ 135,631 $ 178,117
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 March 31, 2016 , December 31, 2015 , and March 31, 2015 , including TDRs that continue to accrue interest and TDRs included in nonperforming assets. As of March 31, 2016 Accruing TDRs Nonaccruing TDRs Total Total (In thousands) Current Delinquent Total Current Delinquent Total TDRs Allowance Originated loans Commercial C&I $ 13,306 $ 1,168 $ 14,474 $ 7,741 $ 5,945 $ 13,686 $ 28,160 $ 6,194 CRE 273 2,247 2,520 765 10,890 11,655 14,175 20 Construction — — — — — — — — Total originated commercial 13,579 3,415 16,994 8,506 16,835 25,341 42,335 6,214 Consumer Installment 38,153 600 38,753 1,342 39 1,381 40,134 1,081 Home equity lines 6,891 101 6,992 713 15 728 7,720 185 Credit card 554 111 665 — 22 22 687 225 Residential mortgages 13,707 1,517 15,224 5,395 2,486 7,881 23,105 1,038 Total originated consumer 59,305 2,329 61,634 7,450 2,562 10,012 71,646 2,529 Total originated TDRs $ 72,884 $ 5,744 $ 78,628 $ 15,956 $ 19,397 $ 35,353 $ 113,981 $ 8,743 Acquired loans Commercial C&I $ — $ — $ — $ — $ — $ — $ — $ — CRE 2,758 — 2,758 665 102 767 3,525 29 Construction — — — — — — — — Total acquired commercial 2,758 — 2,758 665 102 767 3,525 29 Consumer Installment 1,230 — 1,230 87 — 87 1,317 42 Home equity lines 7,281 108 7,389 119 — 119 7,508 59 Residential mortgages 1,156 247 1,403 623 24 647 2,050 — Total acquired consumer 9,667 355 10,022 829 24 853 10,875 101 Total acquired TDRs $ 12,425 $ 355 $ 12,780 $ 1,494 $ 126 $ 1,620 $ 14,400 $ 130 FDIC acquired loans Commercial C&I $ — $ — $ — $ — $ — $ — $ — $ — CRE — — — — 13,176 13,176 13,176 2,302 Construction — — — 580 — 580 580 42 Total FDIC acquired commercial — — — 580 13,176 13,756 13,756 2,344 Consumer Home equity lines 9,395 181 9,576 51 — 51 9,627 26 Residential mortgages — — — — — — — — Total FDIC acquired consumer 9,395 181 9,576 51 — 51 9,627 26 Total FDIC acquired TDRs $ 9,395 $ 181 $ 9,576 $ 631 $ 13,176 $ 13,807 $ 23,383 $ 2,370 Total loans Commercial C&I $ 13,306 $ 1,168 $ 14,474 $ 7,741 $ 5,945 $ 13,686 $ 28,160 $ 6,194 CRE 3,031 2,247 5,278 1,430 24,168 25,598 30,876 2,351 Construction — — — 580 — 580 580 42 Total commercial 16,337 3,415 19,752 9,751 30,113 39,864 59,616 8,587 Consumer Installment 39,383 600 39,983 1,429 39 1,468 41,451 1,123 Home equity lines 23,567 390 23,957 883 15 898 24,855 270 Credit card 554 111 665 — 22 22 687 225 Residential mortgages 14,863 1,764 16,627 6,018 2,510 8,528 25,155 1,038 Total consumer 78,367 2,865 81,232 8,330 2,586 10,916 92,148 2,656 Total TDRs $ 94,704 $ 6,280 $ 100,984 $ 18,081 $ 32,699 $ 50,780 $ 151,764 $ 11,243 As of December 31, 2015 Accruing TDRs Nonaccruing TDRs Total Total (In thousands) Current Delinquent Total Current Delinquent Total TDRs Allowance Originated loans Commercial C&I $ 22,566 $ 107 $ 22,673 $ 4,229 $ 6,185 $ 10,414 $ 33,087 $ 6,052 CRE 10,271 2,247 12,518 746 1,407 2,153 14,671 20 Construction — — — — — — — — Total originated commercial 32,837 2,354 35,191 4,975 7,592 12,567 47,758 6,072 Consumer Installment 34,902 794 35,696 1,125 83 1,208 36,904 1,009 Home equity lines 6,511 114 6,625 399 56 455 7,080 188 Credit card 575 140 715 — 2 2 717 243 Residential mortgages 12,869 2,896 15,765 4,611 3,529 8,140 23,905 944 Total originated consumer 54,857 3,944 58,801 6,135 3,670 9,805 68,606 2,384 Total originated TDRs $ 87,694 $ 6,298 $ 93,992 $ 11,110 $ 11,262 $ 22,372 $ 116,364 $ 8,456 Acquired loans Commercial C&I $ 7,611 $ — $ 7,611 $ — $ — $ — $ 7,611 $ — CRE — — — 659 259 918 918 201 Total acquired commercial 7,611 — 7,611 659 259 918 8,529 201 Consumer Installment 967 126 1,093 14 10 24 1,117 45 Home equity lines 6,941 655 7,596 122 — 122 7,718 70 Residential mortgages 1,096 256 1,352 802 — 802 2,154 — Total acquired consumer 9,004 1,037 10,041 938 10 948 10,989 115 Total acquired TDRs $ 16,615 $ 1,037 $ 17,652 $ 1,597 $ 269 $ 1,866 $ 19,518 $ 316 FDIC acquired loans Commercial C&I $ — $ — $ — $ — $ — $ — $ — $ — CRE — 14,056 14,056 — — — 14,056 2,333 Construction 593 — 593 — — — 593 — Total FDIC acquired commercial 593 14,056 14,649 — — — 14,649 2,333 Consumer Home equity lines 10,065 70 10,135 6 74 80 10,215 23 Residential mortgages 182 — 182 — — — 182 — Total FDIC acquired consumer 10,247 70 10,317 6 74 80 10,397 23 Total FDIC acquired TDRs $ 10,840 $ 14,126 $ 24,966 $ 6 $ 74 $ 80 $ 25,046 $ 2,356 Total Loans Commercial C&I $ 30,177 $ 107 $ 30,284 $ 4,229 $ 6,185 $ 10,414 $ 40,698 $ 6,052 CRE 10,271 16,303 26,574 1,405 1,666 3,071 29,645 2,554 Construction 593 — 593 — — — 593 — Total commercial 41,041 16,410 57,451 5,634 7,851 13,485 70,936 8,606 Consumer Installment 35,869 920 36,789 1,139 93 1,232 38,021 1,054 Home equity lines 23,517 839 24,356 527 130 657 25,013 281 Credit card 575 140 715 — 2 2 717 243 Residential mortgages 14,147 3,152 17,299 5,413 3,529 8,942 26,241 944 Total consumer 74,108 5,051 79,159 7,079 3,754 10,833 89,992 2,522 Total TDRs $ 115,149 $ 21,461 $ 136,610 $ 12,713 $ 11,605 $ 24,318 $ 160,928 $ 11,128 As of March 31, 2015 Accruing TDRs Nonaccruing TDRs Total Total (In thousands) Current Delinquent Total Current Delinquent Total TDRs Allowance Originated loans Commercial C&I $ 16,558 $ — $ 16,558 $ — $ 365 $ 365 $ 16,923 $ 124 CRE 6,031 1,493 7,524 3,724 828 4,552 12,076 71 Construction — — — — — — — — Total originated commercial 22,589 1,493 24,082 3,724 1,193 4,917 28,999 195 Consumer Installment 24,701 409 25,110 1,528 244 1,772 26,882 1,005 Home equity lines 6,680 113 6,793 811 28 839 7,632 254 Credit card 721 77 798 — 17 17 815 263 Residential mortgages 14,299 2,286 16,585 5,020 3,217 8,237 24,822 1,416 Total originated consumer 46,401 2,885 49,286 7,359 3,506 10,865 60,151 2,938 Total originated TDRs $ 68,990 $ 4,378 $ 73,368 $ 11,083 $ 4,699 $ 15,782 $ 89,150 $ 3,133 Acquired loans Commercial C&I $ — $ — $ — $ 2 $ — $ 2 $ 2 $ 2 CRE — — — 954 1,499 2,453 2,453 135 Total acquired commercial — — — 956 1,499 2,455 2,455 137 Consumer Installment 1,139 33 1,172 23 — 23 1,195 48 Home equity lines 6,610 564 7,174 136 — 136 7,310 — Residential mortgages 1,335 — 1,335 616 235 851 2,186 — Total acquired consumer 9,084 597 9,681 775 235 1,010 10,691 48 Total acquired TDRs $ 9,084 $ 597 $ 9,681 $ 1,731 $ 1,734 $ 3,465 $ 13,146 $ 185 FDIC acquired loans Commercial C&I $ — $ — $ — $ — $ — $ — $ — $ — CRE — 23,895 23,895 — — — 23,895 2,026 Construction — 346 346 — — — 346 293 Total FDIC acquired commercial — 24,241 24,241 — — — 24,241 2,319 Consumer Home equity lines 7,703 939 8,642 267 — 267 8,909 24 Residential mortgages 185 — 185 — — — 185 — Total FDIC acquired consumer 7,888 939 8,827 267 — 267 9,094 24 Total FDIC acquired TDRs $ 7,888 $ 25,180 $ 33,068 $ 267 $ — $ 267 $ 33,335 $ 2,343 Total loans Commercial C&I $ 16,558 $ — $ 16,558 $ 2 $ 365 $ 367 $ 16,925 $ 126 CRE 6,031 25,388 31,419 4,678 2,327 7,005 38,424 2,232 Construction — 346 346 — — — 346 293 Total commercial 22,589 25,734 48,323 4,680 2,692 7,372 55,695 2,651 Consumer Installment 25,840 442 26,282 1,551 244 1,795 28,077 1,053 Home equity lines 20,993 1,616 22,609 1,214 28 1,242 23,851 278 Credit card 721 77 798 — 17 17 815 263 Residential mortgages 15,819 2,286 18,105 5,636 3,452 9,088 27,193 1,416 Total consumer 63,373 4,421 67,794 8,401 3,741 12,142 79,936 3,010 Total TDRs $ 85,962 $ 30,155 $ 116,117 $ 13,081 $ 6,433 $ 19,514 $ 135,631 $ 5,661
Schedule of Debtor Troubled Debt Restructuring, Current Period	The following tables provide the number of loans modified in a TDR within the previous 12 months that subsequently defaulted during the three months ended March 31, 2016 and March 31, 2015 , as well as the amount defaulted in these restructured loans. Three Months Ended March 31, 2016 (Dollars in thousands) Number of Loans Amount Defaulted Originated loans Commercial C&I — $ — CRE — — Construction — — Total originated commercial — — Consumer Installment 8 83 Home equity lines — — Credit card 3 2 Residential mortgages 1 76 Total originated consumer 12 $ 161 FDIC acquired loans Commercial C&I — $ — CRE — — Construction — — Total FDIC acquired commercial — $ — Acquired loans Commercial C&I — $ — CRE 1 255 Construction — — Total acquired commercial 1 $ 255 Consumer Installment 2 31 Home equity lines 1 14 Residential mortgages — — Total acquired consumer 3 $ 45 Total loans Commercial C&I — $ — CRE 1 255 Construction — — Total commercial 1 255 Consumer Installment 10 114 Home equity lines 1 14 Credit card 3 2 Residential mortgages 1 76 Total consumer 15 206 Total 16 $ 461 Three Months Ended March 31, 2015 (Dollars in thousands) Number of Loans Recorded Investment Originated loans Commercial C&I — $ — CRE — — Construction — — Total originated commercial — — Consumer Installment 2 — Home equity lines — — Credit card 2 17 Residential mortgages — — Total originated consumer 4 $ 17 FDIC acquired loans Commercial C&I 1 $ 427 CRE — — Construction — — Total FDIC acquired commercial 1 $ 427 Acquired loans Commercial C&I 1 $ 55 CRE — — Construction — — Total acquired commercial 1 $ 55 Total loans Commercial C&I 2 $ 482 CRE — — Construction — — Total commercial 2 482 Consumer Installment 2 — Home equity lines — — Credit card 2 17 Residential mortgages — — Total consumer 4 17 Total 6 $ 499

Goodwill and Other Intangible27

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2016
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. March 31, 2016 Gross Carrying Accumulated Net Carrying (In thousands) Amount Amortization Amount Core deposit intangibles (1) $ 82,323 $ (30,194 ) $ 52,129 Lease intangible 238 (220 ) 18 Trust Relationships (2) 14,000 (7,823 ) 6,177 $ 96,561 (38,237 ) $ 58,324 December 31, 2015 Gross Carrying Accumulated Net Carrying (In thousands) Amount Amortization Amount Core deposit intangibles (1) $ 82,323 $ (28,304 ) $ 54,019 Lease intangible 238 (212 ) 26 Trust Relationships (2) 14,000 (7,417 ) 6,583 $ 96,561 (35,933 ) $ 60,628 March 31, 2015 Gross Carrying Accumulated Net Carrying (In thousands) Amount Amortization Amount Core deposit intangibles (1) $ 82,323 $ (22,073 ) $ 60,250 Lease intangible 238 (185 ) 53 Trust relationships (2) 14,000 (5,881 ) 8,119 $ 96,561 (28,139 ) $ 68,422 (1) Core deposit intangibles are amortized on an accelerated basis over their estimated useful lives, which range from 10 - 15 years. (2) Trust relationship intangibles are amortized on an accelerated basis on their estimated useful lives of 12 years .

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2016
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 March 31, (Dollars in thousands, except per share amounts) 2016 2015 Basic EPS: Net income $ 54,136 $ 57,139 Less: Cash dividends on 5.875% non-cumulative perpetual series A, Preferred Stock 1,469 1,469 Income allocated to participating securities 387 407 Net income attributable to common shareholders $ 52,280 $ 55,263 Weighted average Common Stock outstanding used in basic EPS 165,745 165,411 Basic net income per common share $ 0.32 $ 0.33 Diluted EPS: Income used in diluted earnings per common share calculation $ 52,280 $ 55,263 Weighted average Common Stock outstanding used in basic EPS 165,745 165,411 Add: Common Stock equivalents Employee stock award plans 494 592 Weighted average Common and Common Stock equivalent shares outstanding 166,239 166,003 Diluted net income per common share $ 0.31 $ 0.33

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2016
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 months ended March 31, 2016 and March 31, 2015 : FirstMerit (In thousands) Commercial Retail Wealth Other Consolidated March 31, 2016 QTD QTD QTD QTD QTD OPERATIONS: Net interest income/(loss) $ 102,619 $ 94,728 $ 6,552 $ (18,743 ) $ 185,156 Provision/ (recapture) for loan losses 5,772 4,047 (155 ) (1,855 ) 7,809 Noninterest income 21,179 23,594 14,309 8,312 67,394 Noninterest expense 61,020 88,694 13,353 3,896 166,963 Net income/(loss) 37,054 16,628 4,981 (4,527 ) 54,136 AVERAGES: Assets $ 9,592,202 $ 6,232,255 $ 305,566 $ 9,640,834 $ 25,770,857 Loans 9,709,788 6,020,757 297,143 51,759 16,079,447 Earning assets 10,074,234 6,027,689 297,143 6,491,016 22,890,082 Deposits 7,478,489 11,025,256 1,319,711 812,209 20,635,665 Economic capital 1,252,294 872,762 131,588 713,523 2,970,167 FirstMerit (In thousands) Commercial Retail Wealth Other Consolidated March 31, 2015 QTD QTD QTD QTD QTD OPERATIONS: Net interest income/(loss) $ 99,844 $ 91,095 $ 5,353 $ (10,669 ) $ 185,623 Provision/ (recapture) for loan losses (526 ) 7,533 (170 ) 1,411 8,248 Noninterest income 22,490 21,737 13,976 7,644 65,847 Noninterest expense 61,653 88,271 13,719 (2,991 ) 160,652 Net income/(loss) 39,785 11,068 3,756 2,530 57,139 AVERAGES: Assets $ 9,454,218 $ 5,845,417 $ 302,186 $ 9,303,273 $ 24,905,094 Loans 9,506,529 5,570,590 292,016 58,046 15,427,181 Earning assets 9,794,483 5,582,849 292,016 6,431,069 22,100,417 Deposits 6,886,945 11,124,158 1,240,960 536,862 19,788,925 Economic capital 848,890 479,188 55,187 1,483,097 2,866,362

Derivatives and Hedging Activ30

Derivatives and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments Designated as Hedging Instruments	At March 31, 2016 , December 31, 2015 , and March 31, 2015 , 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 March 31, 2016 December 31, 2015 March 31, 2015 March 31, 2016 December 31, 2015 March 31, 2015 (In thousands) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps: Commercial loan swaps (FRAPS) $ — $ — $ — $ — $ — $ — $ 52,821 $ 3,238 $ 55,689 $ 3,536 $ 89,591 $ 6,063 Sub debt swap 250,000 22,718 250,000 8,739 250,000 12,688 — — — — — — Fair value hedges $ 250,000 $ 22,718 $ 250,000 $ 8,739 $ 250,000 $ 12,688 $ 52,821 $ 3,238 $ 55,689 $ 3,536 $ 89,591 $ 6,063 ( 1) Included in "Other assets" on the Consolidated Balance Sheets (2) Included in "Other liabilities" on the Consolidated Balance Sheet
Derivative Instruments not Designated as Hedging Instruments	As of March 31, 2016 , December 31, 2015 , and March 31, 2015 , 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 March 31, 2016 December 31, 2015 March 31, 2015 March 31, 2016 December 31, 2015 March 31, 2015 (In thousands) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps $ 1,850,414 $ 75,139 $ 1,824,576 $ 48,920 $ 1,718,850 $ 59,147 $ 1,850,414 $ 75,139 $ 1,824,576 $ 48,920 $ 1,718,850 $ 59,147 Mortgage loan commitments 40,904 240 20,635 149 51,937 388 — — — — — — Forward sales contracts — — — — 7,527 82 9,659 5 11,758 68 Credit contracts — — — — — — 74,315 8 73,715 — 80,047 — Foreign exchange 15,467 452 13,671 299 40,537 350 8,641 154 11,706 284 10,052 169 Equity swap — — — — — — 36,125 — 36,631 — 30,896 — Total $ 1,906,785 $ 75,831 $ 1,858,882 $ 49,368 $ 1,811,324 $ 59,885 $ 1,977,022 $ 75,383 $ 1,956,287 $ 49,209 $ 1,851,603 $ 59,384 (1) Included in "Other assets" on the Consolidated Balance Sheets (2) 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 months ended March 31, 2016 and 2015 are as follows: Derivatives not instruments Location of Gain/(Loss) Derivative Amount of Gain / (Loss) Recognized in Income on Derivatives (In thousands) Three Months Ended March 31, 2016 2015 Mortgage loan commitments Loan sales and servicing income $ 92 $ (1,020 ) Forward sales contracts Loan sales and servicing income (77 ) 204 Foreign exchange contracts Other operating income 819 (877 ) Equity swap Other operating expense — — Total $ 834 $ (1,693 )
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 March 31, 2016 , December 31, 2015 , and March 31, 2015 . 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 March 31, 2016 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 (1) Collateral (2) Derivative Assets Interest rate swaps - designated $ 22,718 $ — $ 22,718 $ — $ — $ 22,718 Interest rate swaps - non-designated 20 $ — 20 (20 ) — — Foreign exchange 27 — 27 (27 ) — — Total derivative assets $ 22,765 $ — $ 22,765 $ (47 ) $ — $ 22,718 Derivative liabilities Interest rate swaps - designated $ 3,238 $ — $ 3,238 $ — $ (3,238 ) $ — Interest rate swaps - non-designated 75,119 — 75,119 (20 ) (75,099 ) — Foreign exchange 121 — 121 (27 ) (94 ) — Total derivative liabilities $ 78,478 $ — $ 78,478 $ (47 ) $ (78,431 ) $ — As of December 31, 2015 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 (1) Collateral (2) Derivative assets Interest rate swaps - designated $ 8,739 $ — $ 8,739 $ — $ — $ 8,739 Interest rate swaps - non-designated 155 — 155 (155 ) — — Foreign exchange 270 — 270 (32 ) (238 ) — Total derivative assets $ 9,164 $ — $ 9,164 $ (187 ) $ (238 ) $ 8,739 Derivative liabilities Interest rate swaps - designated $ 3,536 $ — $ 3,536 $ — $ (3,536 ) $ — Interest rate swaps - non-designated 48,765 — 48,765 (155 ) (48,610 ) — Foreign exchange 32 — 32 (32 ) — — Total derivative liabilities $ 52,333 $ — $ 52,333 $ (187 ) $ (52,146 ) $ — As of March 31, 2015 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 (1) Collateral (2) Derivative assets Interest rate swaps - designated 12,688 — 12,688 — — 12,688 Interest rate swaps - non-designated $ 67 $ — $ 67 $ (67 ) $ — $ — Foreign exchange 219 — 219 (47 ) (172 ) — Total derivative assets $ 12,974 $ — $ 12,974 $ (114 ) $ (172 ) $ 12,688 Derivative liabilities Interest rate swaps - designated $ 6,063 $ — $ 6,063 $ — $ (6,063 ) $ — Interest rate swaps - non-designated 59,080 — 59,080 (67 ) (59,013 ) — Foreign exchange 47 — 47 (47 ) — — Total derivative liabilities $ 65,190 $ — $ 65,190 $ (114 ) $ (65,076 ) $ — (1) 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. (2) 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)	3 Months Ended
	Mar. 31, 2016
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 March 31, (In thousands) 2016 2015 Service cost $ 198 $ 207 Interest cost 3,649 3,517 Expected return on assets (3,788 ) (3,902 ) Amortization of unrecognized prior service costs 75 570 Amortization of actuarial losses/(gains) 830 1,057 Net periodic pension cost $ 964 $ 1,449 Postretirement Benefits Three Months Ended March 31, (In thousands) 2016 2015 Service cost $ 26 $ 41 Interest cost 64 144 Amortization of unrecognized prior service costs (636 ) (160 ) Amortization of actuarial losses/(gains) 245 81 Net periodic postretirement cost $ (301 ) $ 106

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	3 Months Ended
	Mar. 31, 2016
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 March 31, 2016 , December 31, 2015 , and March 31, 2015 : Fair Value by Hierarchy (In thousands) March 31, 2016 Level 1 Level 2 Level 3 Recurring fair value measurement Available-for-sale securities: Marketable equity securities $ 2,873 $ 2,873 $ — $ — U.S. government agency debentures 2,520 — 2,520 — U.S. States and political subdivisions 173,141 — 173,141 — Residential mortgage-backed securities: U.S. government agencies 907,656 — 907,656 — Commercial mortgage-backed securities: U.S. government agencies 184,248 — 184,248 — Residential collateralized mortgage-backed securities: U.S. government agencies 2,226,737 — 2,226,737 — Non-agency 4 — — 4 Commercial collateralized mortgage-backed securities: U.S. government agencies 272,882 — 272,882 — Corporate debt securities 48,756 — — 48,756 Asset-backed securities: Collateralized loan obligations 285,397 — — 285,397 Total available for sale securities 4,104,214 2,873 3,767,184 334,157 Residential loans held for sale 5,249 — 5,249 — Derivative assets: Interest rate swaps - fair value hedges 22,718 — 22,718 — Interest rate swaps - nondesignated 75,139 — 75,139 — Mortgage loan commitments 240 — 240 — Foreign exchange 452 — 452 — Total derivative assets 98,549 — 98,549 — Total fair value of assets (1) $ 4,208,012 $ 2,873 $ 3,870,982 $ 334,157 Derivative liabilities: Interest rate swaps - fair value hedges $ 3,238 $ — $ 3,238 $ — Interest rate swaps - nondesignated 75,139 — 75,139 — Forward sales contracts 82 — 82 — Credit contracts 8 — 8 — Foreign exchange 154 — 154 — Total derivative liabilities 78,621 — 78,621 — True-up liability 15,115 — — 15,115 Total fair value of liabilities (1) $ 93,736 $ — $ 78,621 $ 15,115 Nonrecurring fair value measurement Mortgage servicing rights (2) $ 17,460 $ — $ — $ 17,460 Impaired loans (3) 86,315 — — 86,315 Other property (4) 13,629 — — 13,629 Total nonrecurring fair value $ 117,404 $ — $ — $ 117,404 (1) There were no transfers between levels 1, 2 or 3 of the fair value hierarchy during the three months ended March 31, 2016 . (2) MSRs with a recorded investment of $18.1 million were reduced by a specific valuation allowance totaling $0.9 million to a reported carrying value of $17.3 million resulting in recognition of $0.5 million in expense included in loan sales and servicing income in the three months ended March 31, 2016 . (3) At March 31, 2016 , collateral dependent impaired loans with a recorded investment of $94.1 million were reduced by specific valuation allowance allocations totaling $7.8 million to a reported net carrying value of $86.3 million . (4) Amounts do not include assets held at cost at March 31, 2016 . During the three months ended March 31, 2016 , the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $2.0 million included in noninterest expense. Fair Value by Hierarchy (In thousands) December 31, 2015 Level 1 Level 2 Level 3 Recurring fair value measurement Available-for-sale securities: Marketable equity securities $ 2,821 $ 2,821 $ — $ — U.S treasury notes & bonds 5,000 — 5,000 — U.S. government agency debentures 2,498 — 2,498 — U.S. States and political subdivisions 192,795 — 192,795 — Residential mortgage-backed securities: U.S. government agencies 906,229 — 906,229 — Commercial mortgage-backed securities: U.S. government agencies 172,109 — 172,109 — Residential collateralized mortgage-backed securities: U.S. government agencies 2,128,320 — 2,128,320 — Non-agency 4 — — 4 Commercial collateralized mortgage-backed securities: U.S. government agencies 216,319 — 216,319 — Corporate debt securities 52,229 — — 52,229 Asset-backed securities Collateralized loan obligations 289,411 — — 289,411 Total available-for-sale securities 3,967,735 2,821 3,623,270 341,644 Residential loans held for sale 5,472 — 5,472 — Derivative assets: Interest rate swaps - fair value hedges 8,739 — 8,739 — Interest rate swaps - nondesignated 48,920 — 48,920 — Mortgage loan commitments 149 — 149 — Foreign exchange 299 — 299 — Total derivative assets 58,107 — 58,107 — Total fair value of assets (1) $ 4,031,314 $ 2,821 $ 3,686,849 $ 341,644 Derivative liabilities: Interest rate swaps - fair value hedges $ 3,536 $ — $ 3,536 $ — Interest rate swaps - nondesignated 48,920 — 48,920 — Forward sale contracts 5 — 5 — Foreign exchange 284 — 284 — Total derivative liabilities 52,745 — 52,745 — True-up liability 14,750 — — 14,750 Total fair value of liabilities (1) $ 67,495 $ — $ 52,745 $ 14,750 Nonrecurring fair value measurement Mortgage servicing rights (2) $ 19,149 $ — $ — $ 19,149 Impaired loans (3) 71,428 — — 71,428 Other property (4) 18,576 — — 18,576 Other real estate covered by loss share (5) 365 — — 365 Total nonrecurring fair value $ 109,518 $ — $ — $ 109,518 (1) There were no transfers between levels 1, 2 or 3 of the fair value hierarchy during the year ended December 31, 2015 . (2) MSRs with a recorded investment of $18.9 million were reduced by a specific valuation allowance totaling $0.4 million to a reported carrying value of $18.5 million resulting in a recovery of previously recognized expense of $0.6 million in recoveries included in loans sales and servicing income in the year ended December 31, 2015 . (3) At December 31, 2015 , collateral dependent impaired loans with a recorded investment of $84.3 million were reduced by specific valuation allowance allocations totaling $12.9 million to a reported net carrying value of $71.4 million . (4) Amounts do not include assets held at cost at December 31, 2015 . During the year ended December 31, 2015 , the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $4.5 million included in noninterest expense. (5) Amounts do not include assets held at cost at December 31, 2015 . During the year ended December 31, 2015 , the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.6 million included in noninterest expense. Fair Value by Hierarchy (In thousands) March 31, 2015 Level 1 Level 2 Level 3 Recurring fair value measurement Available-for-sale securities: Marketable equity securities $ 2,869 $ 2,869 $ — $ — U.S. government agency debentures 2,513 — 2,513 — U.S. States and political subdivisions 215,164 — 215,164 — Residential mortgage-backed securities: U.S. government agencies 947,303 — 947,303 — Commercial mortgage-backed securities: U.S. government agencies 140,359 — 140,359 — Residential collateralized mortgage-backed securities: U.S. government agencies 1,892,560 — 1,892,560 — Non-agency 6 — 1 5 Commercial collateralized mortgage-backed securities: U.S. government agencies 244,059 — 244,059 — Corporate debt securities 52,264 — — 52,264 Asset-backed securities: Collateralized loan obligations 293,962 — — 293,962 Total available-for-sale securities 3,791,059 2,869 3,441,959 346,231 Residential loans held for sale 3,568 — 3,568 — Derivative assets: Interest rate swaps - fair value hedges 12,688 — 12,688 — Interest rate swaps - nondesignated 59,147 — 59,147 — Mortgage loan commitments 388 — 388 — Foreign exchange 350 — 350 — Total derivative assets 72,573 — 72,573 — Total fair value of assets (1) $ 3,867,200 $ 2,869 $ 3,518,100 $ 346,231 Derivative liabilities: Interest rate swaps - fair value hedges $ 6,063 $ — $ 6,063 $ — Interest rate swaps - nondesignated 59,147 — 59,147 — Forward sale contracts 68 — 68 — Foreign exchange 169 — 169 — Total derivative liabilities 65,447 — 65,447 — True-up liability 13,707 — — 13,707 Total fair value of liabilities (1) $ 79,154 $ — $ 65,447 $ 13,707 Nonrecurring fair value measurement Mortgage servicing rights (2) $ 20,526 $ — $ — $ 20,526 Impaired loans (3) 63,839 — — 63,839 Other property (4) 16,956 — — 16,956 Other real estate covered by loss share (5) 7,293 — — 7,293 Total nonrecurring fair value $ 108,614 $ — $ — $ 108,614 (1) There were no transfers between levels 1, 2 and 3 of the fair value hierarchy during the three months ended March 31, 2015 . (2) MSRs with a recorded investment of $21.5 million were reduced by a specific valuation allowance totaling $1.1 million to a reported carrying value of $20.4 million resulting in recovery of a previously recognized expense of $0.2 million in the three months ended March 31, 2015 . (3) At March 31, 2015 , collateral dependent impaired loans with a recorded investment of $75.6 million were reduced by specific valuation allowance allocations totaling $11.8 million to a reported net carrying value of $63.8 million . (4) Amounts do not include assets held at cost at March 31, 2015 . During the three months ended March 31, 2015 , the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.9 million included in noninterest expense. (5) Amounts do not include assets held at cost at March 31, 2015 . During the three months ended March 31, 2015 , the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $0.3 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 months ended March 31, 2016 and 2015 are summarized as follows: Three Months Ended March 31, 2016 2015 (In thousands) Available-for-sale securities True-up liability Available-for-sale securities True-up liability Balance at beginning of period $ 341,644 $ 14,750 $ 339,187 $ 13,294 (Gains) losses included in earnings (1) — 365 — 413 Unrealized gains (losses) (2) (7,556 ) — 6,682 — Purchases — — — — Sales — — Settlements 69 — 362 — Balance at ending of period $ 334,157 $ 15,115 $ 346,231 $ 13,707 (1) Reported in "Other expense" (2) 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) March 31, 2016 December 31, 2015 March 31, 2015 Aggregate fair value carrying amount $ 5,249 $ 5,472 $ 3,568 Aggregate unpaid principal / contractual balance 5,084 5,320 3,400 Carrying amount over aggregate unpaid principal (1) $ 165 $ 152 $ 168 (1) 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 March 31, 2016 , December 31, 2015 , and March 31, 2015 are shown in the tables below. March 31, 2016 Carrying Amount Fair Value (In thousands) Total Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 759,897 $ 759,897 $ 759,897 $ — $ — Available-for-sale securities 4,104,214 4,104,214 2,873 3,767,184 334,157 Held-to-maturity securities 2,613,700 2,632,274 — 2,632,274 — Other securities 148,159 148,159 — 148,159 — Loans held for sale 5,249 5,249 — 5,249 — Net originated loans 14,286,598 14,069,307 — — 14,069,307 Net acquired loans 1,629,283 1,681,087 — — 1,681,087 Net FDIC acquired loans and loss share receivable 157,632 157,632 — — 157,632 Accrued interest receivable 70,280 70,280 — 70,280 — Derivatives 98,549 98,549 — 98,549 — Financial liabilities: Deposits $ 21,101,366 $ 21,109,594 $ — $ 21,109,594 $ — Federal funds purchased and securities sold under agreements to repurchase 719,850 719,850 — 719,850 — Wholesale borrowings 378,996 383,432 — 383,432 — Long-term debt 519,249 504,468 — 504,468 — Accrued interest payable 10,093 10,093 — 10,093 — Derivatives 78,621 78,621 — 78,621 — December 31, 2015 Carrying Amount Fair Value (In thousands) Total Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 463,817 $ 463,817 $ 463,817 $ — $ — Available-for-sale securities 3,967,735 3,967,735 2,821 3,623,270 341,644 Held-to-maturity securities 2,674,093 2,659,119 — 2,659,119 — Other securities 148,172 148,172 — 148,172 — Loans held for sale 5,472 5,472 — 5,472 — Net originated loans 14,013,370 13,795,058 — — 13,795,058 Net acquired loans 1,739,194 1,796,314 — — 1,796,314 Net FDIC acquired loans and loss share receivable 170,690 170,690 — — 170,690 Accrued interest receivable 67,887 67,887 — 67,887 — Derivatives 58,107 58,107 — 58,107 — Financial liabilities: Deposits $ 20,108,003 $ 20,116,298 $ — $ 20,116,298 $ — Federal funds purchased and securities sold under agreements to repurchase 1,037,075 1,037,075 — 1,037,075 — Wholesale borrowings 580,648 582,120 — 582,120 — Long-term debt 505,173 503,675 — 503,675 — Accrued interest payable 10,758 10,758 — 10,758 — Derivatives 52,745 52,745 — 52,745 — March 31, 2015 Carrying Amount Fair Value (In thousands) Total Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 532,425 $ 532,425 $ 532,425 $ — $ — Available-for-sale securities 3,791,059 3,791,059 2,869 3,441,959 346,231 Held-to-maturity securities 2,855,174 2,848,912 — 2,848,912 — Other securities 148,475 148,475 — 148,475 — Loans held for sale 3,568 3,568 — 3,568 — Net originated loans 12,758,492 12,588,147 — — 12,588,147 Net acquired loans 2,317,386 2,393,942 — — 2,393,942 Net FDIC acquired loans and loss share receivable 268,459 268,459 — — 268,459 Accrued interest receivable 69,086 69,086 — 69,086 — Derivatives 72,573 72,573 — 72,573 — Financial liabilities: Deposits $ 19,925,595 $ 19,932,571 $ — $ 19,932,571 $ — Federal funds purchased and securities sold under agreements to repurchase 1,113,371 1,113,371 — 1,113,371 — Wholesale borrowings 316,628 320,180 — 320,180 — Long-term debt 512,625 527,018 — 527,018 — Accrued interest payable 9,620 9,620 — 9,620 — Derivatives 65,447 65,447 — 65,447 —

Mortgage Servicing Rights and33

Mortgage Servicing Rights and Mortgage Servicing Activity (Tables)	3 Months Ended
	Mar. 31, 2016
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 March 31, (In thousands) 2016 2015 Carrying amount of MSRs Beginning balance $ 18,938 $ 22,011 Additions 28 470 Amortization (839 ) (991 ) Ending balance 18,127 21,490 Valuation Allowance: Beginning balance (399 ) (955 ) Recoveries/(Additions) (469 ) (176 ) Ending balance (868 ) (1,131 ) MSRs, net carrying balance $ 17,259 $ 20,359 Fair value at end of period $ 17,460 $ 20,526
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. (Dollars in thousands) Prepayment speed assumption (annual CPR) 13.30 % Decrease in fair value from 10% adverse change $ 691 Decrease in fair value from 25% adverse change $ 1,342 Discount rate assumption 9.39 % Decrease in fair value from 100 basis point adverse change $ 528 Decrease in fair value from 200 basis point adverse change $ 1,022 Expected weighted-average life (in months) 90

Contingencies and Guarantees (T

Contingencies and Guarantees (Tables)	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Schedule of Commitments to Extend Credit	The Corporation's credit risk associated with these instruments is represented by the contractual amounts indicated in the following table. Unused commitments to extend credit (In thousands) March 31, 2016 December 31, 2015 March 31, 2015 Commercial $ 3,609,266 $ 3,992,089 $ 3,691,193 Consumer 2,458,973 2,393,058 2,343,677 Total unused commitments to extend credit $ 6,068,239 $ 6,385,147 $ 6,034,870
Schedule of Guarantor Obligations	The Corporation is a guarantor in certain agreements with third parties. The Corporation's maximum credit risk associated with these instruments is represented by the contractual amounts indicated in the following table. Financial guarantees (In thousands) March 31, 2016 December 31, 2015 March 31, 2015 Standby letters of credit $ 236,642 $ 254,703 $ 275,736 Loans sold with recourse 11,781 12,902 39,996 Total financial guarantees $ 248,423 $ 267,605 $ 315,732
Changes in Repurchase Reserve	Changes in the repurchase reserves for the three months ended March 31, 2016 and 2015 are as follows: Three Months Ended March 31, (In thousands) 2016 2015 Balance at beginning of period $ 2,725 $ 7,250 Net increase/(decrease) to reserve (53 ) (402 ) Net realized (losses)/gains (47 ) (198 ) Balance at end of period $ 2,625 $ 6,650

Changes and Reclassifications35

Changes and Reclassifications Out of Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2016
Changes and Reclassifications Out of Other Comprehensive Income [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents the changes in AOCI by component of comprehensive income for the three months ended March 31, 2016 and 2015 : Three Months Ended March 31, 2016 (In thousands) Pretax Tax After tax Unrealized and realized securities gains and losses: Balance at the beginning of the period $ (32,786 ) $ (15,840 ) $ (16,946 ) Changes in unrealized securities' holding gains/(losses) 48,379 17,562 30,817 Changes in unrealized securities' holding gains/(losses) that result from securities being transferred from available-for-sale into held-to-maturity (1,441 ) (147 ) (1,294 ) Net losses/(gains) realized on sale of securities reclassified to noninterest income 295 107 188 Balance at the end of the period 14,447 1,682 12,765 Pension plans and other postretirement benefits: Balance at the beginning of the period (95,760 ) (33,432 ) (62,328 ) Current year actual losses/(gains) — — — Amortization of actuarial losses/(gains) 2,168 773 1,395 Amortization of prior service cost reclassified to other noninterest expense (260 ) (87 ) (173 ) Balance at the end of the period (93,852 ) (32,746 ) (61,106 ) Total Accumulated Other Comprehensive Income $ (79,405 ) $ (31,064 ) $ (48,341 ) Three Months Ended March 31, 2015 (In thousands) Pretax Tax After tax Unrealized and realized securities gains and losses: Balance at the beginning of the period $ (8,531 ) $ (2,985 ) $ (5,546 ) Changes in unrealized securities' holding gains/(losses) 34,117 11,941 22,176 Changes in unrealized securities' holding gains/(losses) that result from securities being transferred from available-for-sale into held-to-maturity (504 ) (176 ) (328 ) Net losses/(gains) realized on sale of securities reclassified to noninterest income (354 ) (124 ) (230 ) Balance at the end of the period 24,728 8,656 16,072 Pension plans and other postretirement benefits: Balance at the beginning of the period (102,068 ) (35,722 ) (66,346 ) Amortization of actuarial losses/(gains) 1,138 398 740 Amortization of prior service cost reclassified to other noninterest expense 410 143 267 Balance at the end of the period (100,520 ) (35,181 ) (65,339 ) Total Accumulated Other Comprehensive Income $ (75,792 ) $ (26,525 ) $ (49,267 )
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 months ended March 31, 2016 and 2015 : Three Months Ended (In thousands) March 31, 2016 Income statement line item presentation Realized (gains)/losses on sale of securities $ 295 Investment securities losses (gains), net Tax expense (benefit) (36.3%) 107 Income tax expense (benefit) Reclassified amount, net of tax $ 188 Three Months Ended (In thousands) March 31, 2015 Income statement line item presentation Realized (gains)/losses on sale of securities $ (354 ) Investment securities losses (gains), net Tax expense (benefit) (35%) (124 ) Income tax expense (benefit) Reclassified amount, net of tax $ (230 )

Significant Accounting Polici36

Significant Accounting Policies (Details)	Mar. 31, 2016Branch
Accounting Policies [Abstract]
Number of branches	368

Investment Securities (Amortize

Investment Securities (Amortized Cost Table and Fair Value of Held to Maturity and Available for Sale Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Securities available for sale
Available-for-sale Securities, Amortized Cost	$ 4,088,856	$ 4,005,782	$ 3,774,542
Available-for-sale Debt Securities, Gross Unrealized Gains	49,739	18,980	47,287
Available-for-sale Debt Securities, Gross Unrealized Losses	(34,381)	(57,027)	(30,770)
Available-for-sale	4,104,214	3,967,735	3,791,059
Securities held to maturity
Held-to-maturity Securities, Amortized Cost	2,613,700	2,674,093	2,855,174
Held-to-maturity Securities, Gross Unrealized Gains	34,505	28,375	25,071
Held-to-maturity Securities, Gross Unrealized Losses	(15,931)	(43,349)	(31,333)
Held-to-maturity Securities, Fair Value	2,632,274	2,659,119	2,848,912
US Treasury Securities
Securities available for sale
Available-for-sale Securities, Amortized Cost		5,001
Available-for-sale Debt Securities, Gross Unrealized Gains		0
Available-for-sale Debt Securities, Gross Unrealized Losses		(1)
Available-for-sale		5,000
Securities held to maturity
Held-to-maturity Securities, Amortized Cost			5,000
Held-to-maturity Securities, Gross Unrealized Gains			0
Held-to-maturity Securities, Gross Unrealized Losses			0
Held-to-maturity Securities, Fair Value			5,000
US Government Agencies Debt Securities
Securities available for sale
Available-for-sale Securities, Amortized Cost	2,500	2,500	2,500
Available-for-sale Debt Securities, Gross Unrealized Gains	20	0	13
Available-for-sale Debt Securities, Gross Unrealized Losses	0	(2)	0
Available-for-sale	2,520	2,498	2,513
Securities held to maturity
Held-to-maturity Securities, Amortized Cost	25,000	25,000	25,000
Held-to-maturity Securities, Gross Unrealized Gains	26	19	0
Held-to-maturity Securities, Gross Unrealized Losses	0	0	(178)
Held-to-maturity Securities, Fair Value	25,026	25,019	24,822
U.S. States and political subdivisions debt securities
Securities available for sale
Available-for-sale Securities, Amortized Cost	169,281	188,829	208,800
Available-for-sale Debt Securities, Gross Unrealized Gains	3,894	4,170	6,750
Available-for-sale Debt Securities, Gross Unrealized Losses	(34)	(204)	(386)
Available-for-sale	173,141	192,795	215,164
Securities held to maturity
Held-to-maturity Securities, Amortized Cost	558,795	571,738	523,501
Held-to-maturity Securities, Gross Unrealized Gains	17,285	22,180	8,864
Held-to-maturity Securities, Gross Unrealized Losses	(262)	(262)	(1,147)
Held-to-maturity Securities, Fair Value	575,818	593,656	531,218
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Securities available for sale
Available-for-sale Securities, Amortized Cost	889,511	900,358	924,453
Available-for-sale Debt Securities, Gross Unrealized Gains	18,398	11,325	24,799
Available-for-sale Debt Securities, Gross Unrealized Losses	(253)	(5,454)	(1,949)
Available-for-sale	907,656	906,229	947,303
Securities held to maturity
Held-to-maturity Securities, Amortized Cost	88,314	507,908	577,278
Held-to-maturity Securities, Gross Unrealized Gains	1,280	4,767	10,745
Held-to-maturity Securities, Gross Unrealized Losses	(266)	(2,999)	(1,677)
Held-to-maturity Securities, Fair Value	89,328	509,676	586,346
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Securities available for sale
Available-for-sale Securities, Amortized Cost	181,846	173,912	139,789
Available-for-sale Debt Securities, Gross Unrealized Gains	2,654	220	1,231
Available-for-sale Debt Securities, Gross Unrealized Losses	(252)	(2,023)	(661)
Available-for-sale	184,248	172,109	140,359
Securities held to maturity
Held-to-maturity Securities, Amortized Cost	489,216	64,951	57,818
Held-to-maturity Securities, Gross Unrealized Gains	10,159	294	765
Held-to-maturity Securities, Gross Unrealized Losses	(212)	(574)	(108)
Held-to-maturity Securities, Fair Value	499,163	64,671	58,475
Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises
Securities available for sale
Available-for-sale Securities, Amortized Cost	2,214,035	2,155,808	1,895,112
Available-for-sale Debt Securities, Gross Unrealized Gains	20,761	2,659	11,305
Available-for-sale Debt Securities, Gross Unrealized Losses	(8,059)	(30,147)	(13,857)
Available-for-sale	2,226,737	2,128,320	1,892,560
Securities held to maturity
Held-to-maturity Securities, Amortized Cost	1,113,901	1,161,340	1,320,215
Held-to-maturity Securities, Gross Unrealized Gains	2,414	75	1,959
Held-to-maturity Securities, Gross Unrealized Losses	(14,257)	(35,881)	(24,846)
Held-to-maturity Securities, Fair Value	1,102,058	1,125,534	1,297,328
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency
Securities available for sale
Available-for-sale Securities, Amortized Cost	4	4	6
Available-for-sale Debt Securities, Gross Unrealized Gains	0	0	0
Available-for-sale Debt Securities, Gross Unrealized Losses	0	0	0
Available-for-sale	4	4	6
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	269,197	217,008	241,839
Available-for-sale Debt Securities, Gross Unrealized Gains	3,976	580	2,602
Available-for-sale Debt Securities, Gross Unrealized Losses	(291)	(1,269)	(382)
Available-for-sale	272,882	216,319	244,059
Securities held to maturity
Held-to-maturity Securities, Amortized Cost	251,421	255,359	256,352
Held-to-maturity Securities, Gross Unrealized Gains	2,436	676	1,659
Held-to-maturity Securities, Gross Unrealized Losses	(934)	(3,611)	(3,377)
Held-to-maturity Securities, Fair Value	252,923	252,424	254,634
Collateralized Loan Obligations
Securities available for sale
Available-for-sale Securities, Amortized Cost	297,885	297,831	297,506
Available-for-sale Debt Securities, Gross Unrealized Gains	36	26	587
Available-for-sale Debt Securities, Gross Unrealized Losses	(12,524)	(8,446)	(4,131)
Available-for-sale	285,397	289,411	293,962
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	61,724	61,710	61,668
Available-for-sale Debt Securities, Gross Unrealized Gains	0	0	0
Available-for-sale Debt Securities, Gross Unrealized Losses	(12,968)	(9,481)	(9,404)
Available-for-sale	48,756	52,229	52,264
Securities held to maturity
Held-to-maturity Securities, Amortized Cost	87,053	87,797	90,010
Held-to-maturity Securities, Gross Unrealized Gains	905	364	1,079
Held-to-maturity Securities, Gross Unrealized Losses	0	(22)	0
Held-to-maturity Securities, Fair Value	87,958	88,139	91,089
Debt Securities
Securities available for sale
Available-for-sale Securities, Amortized Cost	4,085,983	4,002,961	3,771,673
Available-for-sale Debt Securities, Gross Unrealized Gains	49,739	18,980	47,287
Available-for-sale Debt Securities, Gross Unrealized Losses	(34,381)	(57,027)	(30,770)
Available-for-sale	4,101,341	3,964,914	3,788,190
Marketable Equity Securities
Securities available for sale
Available-for-sale Securities, Amortized Cost	2,873	2,821	2,869
Available-for-sale Debt Securities, Gross Unrealized Gains	0	0	0
Available-for-sale Debt Securities, Gross Unrealized Losses	0	0	0
Available-for-sale	2,873	2,821	2,869
Other Security Investments
Securities available for sale
Available-for-sale Securities, Amortized Cost			0
Available-for-sale Debt Securities, Gross Unrealized Gains			0
Available-for-sale Debt Securities, Gross Unrealized Losses			0
Available-for-sale			0
Equity Securities
Securities available for sale
Available-for-sale Securities, Amortized Cost	2,873		2,869
Available-for-sale Debt Securities, Gross Unrealized Gains	0		0
Available-for-sale Debt Securities, Gross Unrealized Losses	0		0
Available-for-sale	$ 2,873	$ 2,821	$ 2,869

Investment Securities (Schedule

Investment Securities (Schedule of General Obligation Bonds) (Details) $ in Thousands	Mar. 31, 2016USD ($)issuers	Dec. 31, 2015USD ($)issuers	Mar. 31, 2015USD ($)
general obligation bonds [Line Items]
General obligation bonds, number of issuers	676	712	802
General obligation bonds, average issue size, fair value	$ 1,035	$ 1,033	$ 896,000
General obligation bonds, amortized cost	681,337	712,035	705,542,000
General obligation bonds, fair value	$ 699,549	$ 735,350	$ 718,992,000
MICHIGAN
general obligation bonds [Line Items]
General obligation bonds, number of issuers	137	137	136
General obligation bonds, average issue size, fair value	$ 1,364	$ 1,381	$ 925,000
General obligation bonds, amortized cost	180,322	180,508	124,908,000
General obligation bonds, fair value	$ 186,935	$ 189,259	$ 125,864,000
OHIO
general obligation bonds [Line Items]
General obligation bonds, number of issuers	110	111	164
General obligation bonds, average issue size, fair value	$ 1,098	$ 1,091	$ 857,000
General obligation bonds, amortized cost	117,643	116,783	138,091,000
General obligation bonds, fair value	$ 120,829	$ 121,117	$ 140,620,000
ILLINOIS
general obligation bonds [Line Items]
General obligation bonds, number of issuers	61	55	62
General obligation bonds, average issue size, fair value	$ 615	$ 1,870	$ 1,841,000
General obligation bonds, amortized cost	36,369	99,524	111,649,000
General obligation bonds, fair value	$ 37,528	$ 102,867	$ 114,150,000
TEXAS
general obligation bonds [Line Items]
General obligation bonds, number of issuers	53	58	73
General obligation bonds, average issue size, fair value	$ 1,840	$ 807	$ 760,000
General obligation bonds, amortized cost	95,228	45,818	53,877,000
General obligation bonds, fair value	$ 97,511	$ 46,805	$ 55,497,000
WISCONSIN
general obligation bonds [Line Items]
General obligation bonds, number of issuers	53	69	63
General obligation bonds, average issue size, fair value	$ 802	$ 673	$ 784,000
General obligation bonds, amortized cost	41,356	44,794	48,388,000
General obligation bonds, fair value	$ 42,496	$ 46,454	$ 49,396,000
PENNSYLVANIA
general obligation bonds [Line Items]
General obligation bonds, number of issuers	41	42	46
General obligation bonds, average issue size, fair value	$ 1,035	$ 1,020	$ 1,018,000
General obligation bonds, amortized cost	41,680	42,185	46,085,000
General obligation bonds, fair value	$ 42,448	$ 42,835	$ 46,816,000
WASHINGTON
general obligation bonds [Line Items]
General obligation bonds, number of issuers	33	29	31
General obligation bonds, average issue size, fair value	$ 736	$ 950	$ 930,000
General obligation bonds, amortized cost	23,746	27,080	28,194,000
General obligation bonds, fair value	$ 24,285	$ 27,548	$ 28,836,000
NEW JERSEY
general obligation bonds [Line Items]
General obligation bonds, number of issuers	29	35	37
General obligation bonds, average issue size, fair value	$ 948	$ 725	$ 747,000
General obligation bonds, amortized cost	26,977	24,810	26,724,000
General obligation bonds, fair value	$ 27,497	$ 25,372	$ 27,623,000
MINNESOTA
general obligation bonds [Line Items]
General obligation bonds, number of issuers	23	33	35
General obligation bonds, average issue size, fair value	$ 699	$ 667	$ 697,000
General obligation bonds, amortized cost	15,713	21,679	23,821,000
General obligation bonds, fair value	$ 16,069	$ 22,020	$ 24,405,000
MISSOURI
general obligation bonds [Line Items]
General obligation bonds, number of issuers	18	15	15
General obligation bonds, average issue size, fair value	$ 617	$ 1,078	$ 1,098,000
General obligation bonds, amortized cost	10,819	15,878	16,032,000
General obligation bonds, fair value	$ 11,104	$ 16,174	$ 16,472,000
NEW YORK
general obligation bonds [Line Items]
General obligation bonds, number of issuers	11	18	19
General obligation bonds, average issue size, fair value	$ 1,086	$ 635	$ 629,000
General obligation bonds, amortized cost	11,637	11,161	11,646,000
General obligation bonds, fair value	$ 11,948	$ 11,422	$ 11,948,000
Other states
general obligation bonds [Line Items]
General obligation bonds, number of issuers	107	110	121
General obligation bonds, average issue size, fair value	$ 756	$ 759	$ 639,000
General obligation bonds, amortized cost	79,847	81,815	76,127,000
General obligation bonds, fair value	$ 80,899	$ 83,477	$ 77,365,000

Investment Securities (Other In

Investment Securities (Other Investments Table) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Other investments
FRB stock	$ 56,083	$ 56,083	$ 55,681
FHLB stock	91,714	91,714	92,381
Other	362	375	413
Total other investments	$ 148,159	$ 148,172	$ 148,475

Investment Securities (Realized

Investment Securities (Realized Gain Loss Table) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Proceeds and gross unrealized gains and losses on sales of available-for-sale securities
Realized gains	$ 295	$ 392
Realized losses	0	(38)
Net securities (losses)/gains	$ 295	$ 354

Investment Securities (Gross Un

Investment Securities (Gross Unrealized Loss Table) (Details) $ in Thousands	Mar. 31, 2016USD ($)securities	Dec. 31, 2015USD ($)securities	Mar. 31, 2015USD ($)
Securities available for sale
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 281,941	$ 1,849,320	$ 245,893
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (6,865)	$ (19,569)	$ (1,647)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	46	180	46
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 793,054	$ 913,649	$ 1,172,260
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (27,516)	$ (37,458)	$ (29,123)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	79	91	114
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 1,074,995	$ 2,762,969	$ 1,418,153
Available-for-sale Securities, Continuous Unrealized Loss Position, Total	34,381	57,027	30,770
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	17,759	370,605	90,604
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (284)	$ (2,916)	$ (1,287)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	10	58	30
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 1,033,743	$ 1,171,297	$ 1,389,498
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (15,647)	$ (40,433)	$ (30,046)
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	74	79	83
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	$ 1,051,502	$ 1,541,902	$ 1,480,102
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total	(15,931)	(43,349)	(31,333)
US Government Agencies Debt Securities
Securities available for sale
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		2,498
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ (2)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | securities		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 0
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | securities		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		$ 2,498
Available-for-sale Securities, Continuous Unrealized Loss Position, Total		2
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0		$ 0
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	0		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 0		$ 24,822
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0		$ (178)
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	0		1
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	$ 0		$ 24,822
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total	0		(178)
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	2,880	10,178	14,380
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (14)	$ (37)	$ (117)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	6	20	23
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 1,899	$ 5,899	$ 6,004
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (20)	$ (167)	$ (269)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	4	9	10
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 4,779	$ 16,077	$ 20,384
Available-for-sale Securities, Continuous Unrealized Loss Position, Total	34	204	386
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	4,491	18,465	38,202
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (21)	$ (224)	$ (1,093)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	9	21	26
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 7,793	$ 4,174	$ 4,448
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (241)	$ (38)	$ (54)
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	10	6	6
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	$ 12,284	$ 22,639	$ 42,650
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total	(262)	(262)	(1,147)
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	171	328,156	74,517
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (3,026)	$ (360)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	2	27	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 32,960	$ 95,895	$ 108,052
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (253)	$ (2,428)	$ (1,589)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	3	7	8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 33,131	$ 424,051	$ 182,569
Available-for-sale Securities, Continuous Unrealized Loss Position, Total	253	5,454	1,949
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	85,738	28,386
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (715)	$ (123)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	0	6	2
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 62,997	$ 97,880	$ 110,329
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (212)	$ (2,284)	$ (1,554)
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	4	6	6
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	$ 62,997	$ 183,618	$ 138,715
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total	(212)	(2,999)	(1,677)
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	0	107,074	49,129
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (1,447)	$ (175)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	0	15	7
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 12,595	$ 12,401	$ 17,690
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (252)	$ (576)	$ (486)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	1	1	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 12,595	$ 119,475	$ 66,819
Available-for-sale Securities, Continuous Unrealized Loss Position, Total	252	2,023	661
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	13,268	34,833	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (263)	$ (346)	$ 0
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	1	6	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 9,438	$ 9,269	$ 9,554
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (3)	$ (228)	$ (108)
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	1	1	1
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	$ 22,706	$ 44,102	$ 9,554
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total	(266)	(574)	(108)
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	96,691	1,130,779	70,574
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (568)	$ (10,587)	$ (762)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	6	78	6
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 552,785	$ 597,403	$ 745,621
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (7,491)	$ (19,560)	$ (13,095)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	46	49	53
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 649,476	$ 1,728,182	$ 816,195
Available-for-sale Securities, Continuous Unrealized Loss Position, Total	8,059	30,147	13,857
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	140,514	19,016
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (1,225)	$ (71)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	0	12	1
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 873,299	$ 941,982	$ 1,095,375
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (14,257)	$ (34,656)	$ (24,775)
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	52	55	56
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	$ 873,299	$ 1,082,496	$ 1,114,391
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total	(14,257)	(35,881)	(24,846)
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	32,200	113,825	13,206
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (107)	$ (893)	$ (24)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	5	12	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 22,464	$ 23,400	$ 61,132
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (184)	$ (376)	$ (358)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	2	2	6
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 54,664	$ 137,225	$ 74,338
Available-for-sale Securities, Continuous Unrealized Loss Position, Total	291	1,269	382
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	71,812	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (384)	$ 0
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions	0	7	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 80,216	$ 117,992	$ 144,970
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (934)	$ (3,227)	$ (3,377)
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions	7	11	13
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	$ 80,216	$ 189,804	$ 144,970
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total	(934)	(3,611)	(3,377)
Collateralized Loan Obligations
Securities available for sale
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	149,999	151,810	24,087
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (6,176)	$ (3,576)	$ (209)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	27	26	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 121,596	$ 126,422	$ 181,498
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (6,348)	$ (4,870)	$ (3,922)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	15	15	27
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 271,595	$ 278,232	$ 205,585
Available-for-sale Securities, Continuous Unrealized Loss Position, Total	12,524	8,446	4,131
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, Accumulated Loss	$ 0	$ 0	$ 0
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	0	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 48,755	$ 52,229	$ 52,263
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (12,968)	$ (9,481)	$ (9,404)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	8	8	8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 48,755	$ 52,229	$ 52,263
Available-for-sale Securities, Continuous Unrealized Loss Position, Total	$ 12,968	9,481	9,404
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		19,243	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ (22)	$ 0
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions		6	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		$ 0	$ 0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 0	$ 0
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions		0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value		$ 19,243	$ 0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total		(22)	0
US Treasury Securities
Securities available for sale
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		5,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ (1)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | securities		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 0
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | securities		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		$ 5,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Total		$ 1
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value			5,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss			$ 0
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions			1
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value			$ 0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss			$ 0
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions			0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value			$ 5,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Total			$ 0

Investment Securities (Maturiti

Investment Securities (Maturities Table) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Securities Available for Sale
One year or less	$ 7,239
Available for Sale Securities Debt Maturities Maturity Period of One Year or Less Weighted Average Yield	3.29%
Over one year through five years	$ 208,258
Available for Sale Securities Debt Maturities Maturity Period over One Year Through Five Years Weighted Average Yield	3.80%
Over five years through ten years	$ 567,425
Available for Sale Securities Debt Maturities Maturity Period over Five Years Through Ten Years Weighted Average Yield	3.06%
Over ten years	$ 3,318,419
Available for Sale Securities Debt Maturities Maturity Period over Ten Years Weighted Average Yield	2.11%
Available-for-sale	$ 4,104,214	$ 3,967,735	$ 3,791,059
Amortized Cost	$ 4,088,856	4,005,782	3,774,542
Weighted-Average Yield	2.33%
Securities Held to Maturity
One year or less	$ 88,093
Held to Maturity Securities Debt Maturities Maturity Period over One Year Through Five Years Weighted Average Yield	2.21%
Over one year through five years	$ 365,180
Held to Maturity Securities Debt Maturities Maturity Period over Five Years Through Ten Years Weighted Average Yield	2.45%
Over five years through ten years	$ 318,693
Held to Maturity Securities Debt Maturities Maturity Period over Ten Years Weighted Average Yield	3.83%
Over ten years	$ 1,860,308
Held to Maturity Securities Debt Maturities Maturity Period Weighted Average Yield	2.07%
Held-to-maturity Securities, Fair Value	$ 2,632,274	2,659,119	2,848,912
Held-to-maturity Securities, Carrying Amount	$ 2,613,700	2,674,093	2,855,174
Weighted Average Yield	2.34%
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	3 years 12 months 7 days
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	3 years 12 months 29 days
US Government Agencies Debt Securities
Securities Available for Sale
One year or less	$ 0
Over one year through five years	2,520
Over five years through ten years	0
Over ten years	0
Available-for-sale	2,520	2,498	2,513
Amortized Cost	$ 2,500	2,500	2,500
Weighted-Average Yield	1.25%
Securities Held to Maturity
One year or less	$ 0
Over one year through five years	25,026
Over five years through ten years	0
Over ten years	0
Held-to-maturity Securities, Fair Value	25,026	25,019	24,822
Held-to-maturity Securities, Carrying Amount	$ 25,000	25,000	25,000
Weighted Average Yield	1.43%
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	2 years 8 months 2 days
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	3 years 12 months 29 days
US Treasury Securities
Securities Available for Sale
Available-for-sale		5,000
Amortized Cost		5,001
Securities Held to Maturity
Held-to-maturity Securities, Fair Value			5,000
Held-to-maturity Securities, Carrying Amount			5,000
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	6 months
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	1 day
U.S. States and political subdivisions debt securities
Securities Available for Sale
One year or less	$ 7,120
Over one year through five years	79,686
Over five years through ten years	66,049
Over ten years	20,286
Available-for-sale	173,141	192,795	215,164
Amortized Cost	$ 169,281	188,829	208,800
Weighted-Average Yield	5.17%
Securities Held to Maturity
One year or less	$ 65,484
Over one year through five years	157,086
Over five years through ten years	202,251
Over ten years	150,997
Held-to-maturity Securities, Fair Value	575,818	593,656	531,218
Held-to-maturity Securities, Carrying Amount	$ 558,795	571,738	523,501
Weighted Average Yield	4.22%
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	2 years 5 months 24 days
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	5 years 4 months 11 days
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Securities Available for Sale
One year or less	$ 119
Over one year through five years	61,444
Over five years through ten years	52,312
Over ten years	793,781
Available-for-sale	907,656	906,229	947,303
Amortized Cost	$ 889,511	900,358	924,453
Weighted-Average Yield	2.40%
Securities Held to Maturity
One year or less	$ 0
Over one year through five years	36,437
Over five years through ten years	52,891
Over ten years	0
Held-to-maturity Securities, Fair Value	89,328	509,676	586,346
Held-to-maturity Securities, Carrying Amount	$ 88,314	507,908	577,278
Weighted Average Yield	2.02%
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	3 years 9 months 23 days
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	3 years 12 months 29 days
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Securities Available for Sale
One year or less	$ 0
Over one year through five years	32,937
Over five years through ten years	122,070
Over ten years	29,241
Available-for-sale	184,248	172,109	140,359
Amortized Cost	$ 181,846	173,912	139,789
Weighted-Average Yield	2.15%
Securities Held to Maturity
One year or less	$ 0
Over one year through five years	0
Over five years through ten years	22,567
Over ten years	476,596
Held-to-maturity Securities, Fair Value	499,163	64,671	58,475
Held-to-maturity Securities, Carrying Amount	$ 489,216	64,951	57,818
Weighted Average Yield	2.15%
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	3 years 12 months 14 days
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	2 years 7 months 17 days
Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises
Securities Available for Sale
One year or less	$ 0
Over one year through five years	16,015
Over five years through ten years	11,655
Over ten years	2,199,067
Available-for-sale	2,226,737	2,128,320	1,892,560
Amortized Cost	$ 2,214,035	2,155,808	1,895,112
Weighted-Average Yield	2.04%
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	1,102,058
Held-to-maturity Securities, Fair Value	1,102,058	1,125,534	1,297,328
Held-to-maturity Securities, Carrying Amount	$ 1,113,901	1,161,340	1,320,215
Weighted Average Yield	1.60%
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	3 years 8 months 9 days
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	3 years 8 months 9 days
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency
Securities Available for Sale
One year or less	$ 0
Over one year through five years	3
Over five years through ten years	0
Over ten years	1
Available-for-sale	4	4	6
Amortized Cost	$ 4	4	6
Weighted-Average Yield	2.60%
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, Carrying Amount	$ 0
Weighted Average Yield	0.00%
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	3 years 12 months 25 days
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Securities Available for Sale
One year or less	$ 0
Over one year through five years	15,653
Over five years through ten years	110,696
Over ten years	146,533
Available-for-sale	272,882	216,319	244,059
Amortized Cost	$ 269,197	217,008	241,839
Weighted-Average Yield	2.21%
Securities Held to Maturity
One year or less	$ 0
Over one year through five years	81,282
Over five years through ten years	40,984
Over ten years	130,657
Held-to-maturity Securities, Fair Value	252,923	252,424	254,634
Held-to-maturity Securities, Carrying Amount	$ 251,421	255,359	256,352
Weighted Average Yield	2.00%
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	3 years 9 months 30 days
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	4 years 1 month 27 days
Collateralized Loan Obligations
Securities Available for Sale
One year or less	$ 0
Over one year through five years	0
Over five years through ten years	204,643
Over ten years	80,754
Available-for-sale	285,397	289,411	293,962
Amortized Cost	$ 297,885	297,831	297,506
Weighted-Average Yield	3.07%
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, Carrying Amount	$ 0
Weighted Average Yield	0.00%
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	6 years 5 months 24 days
Corporate 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	48,756
Available-for-sale	48,756	52,229	52,264
Amortized Cost	$ 61,724	61,710	61,668
Weighted-Average Yield	1.34%
Securities Held to Maturity
One year or less	$ 22,609
Over one year through five years	65,349
Over five years through ten years	0
Over ten years	0
Held-to-maturity Securities, Fair Value	87,958	88,139	91,089
Held-to-maturity Securities, Carrying Amount	$ 87,053	87,797	90,010
Weighted Average Yield	2.26%
Available for Sale Securities, Debt Maturities, Weighted-Average Mat	11 years 12 months 22 days
Held to Maturity Securities Debt Maturities-Weighted Aver Maturity	2 years 3 months 12 days
Debt Securities
Securities Available for Sale
Available-for-sale	$ 4,101,341	3,964,914	3,788,190
Amortized Cost	$ 4,085,983	$ 4,002,961	$ 3,771,673

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Schedule of Investments [Line Items]
General obligation bonds, aggregate fair value	$ 10,000
Number of states with aggregate fair value of general obligation bonds greater than $10 million	11
Total number of states general obligation bonds are held	37
Available for sale securities, net unrealized losses	$ 33,900	$ (10,300)	$ (53,000)
Unrealized gain (loss) on investments	$ (50,300)	(62,100)	(100,400)
Number of single issuer trust preferred securities with stated maturities	8
Percent of trust preferred securities included in fair value of entire investment portfolio	1.00%
Available-for-sale	$ 4,104,214	3,791,059	3,967,735
Other investment securities pledged	$ 3,400,000	3,500,000	2,900,000
Maximum portfolio concentration in municipal securities per corporate investment policy	20.00%
Amount of municipal securities with a combined individual state to total municipal outstanding equal to or less than, per corporate policy	25.00%
Collateralized Loan Obligations
Schedule of Investments [Line Items]
Available-for-sale	$ 285,397	$ 293,962	$ 289,411
Accumulated unrealized gain (loss), before tax	$ (12,500)

Loans (Schedule of Accounts, No

Loans (Schedule of Accounts, Notes, Loans and Financing Receivables) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Commercial	$ 9,850,884	$ 9,814,088	$ 9,611,482
Loans and Leases Receivable, Gross, Consumer, Mortgage	1,043,350	1,048,621	1,058,642
Loans and Leases Receivable, Gross, Consumer, Installment, Other	3,696,167	3,565,798	3,222,762
Loans and Leases Receivable, Gross, Consumer, Home Equity	1,446,590	1,455,648	1,417,232
FDIC Indemnification Asset	9,436	9,947	20,005
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	179,023	182,843	160,766
Loans and Leases Receivable, Gross	16,225,450	16,076,945	15,490,889
Allowance for loan losses	(151,937)	(153,691)	(146,552)
Net loans	16,073,513	15,923,254	15,344,337
Originated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Commercial	9,100,731	9,007,830	8,420,765
Loans and Leases Receivable, Gross, Consumer, Mortgage	700,138	689,045	639,980
Loans and Leases Receivable, Gross, Consumer, Installment, Other	3,154,912	2,990,349	2,500,288
Loans and Leases Receivable, Gross, Consumer, Home Equity	1,254,709	1,248,438	1,134,238
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	179,023	182,843	160,766
Loans and Leases Receivable, Gross	14,389,513	14,118,505	12,856,037
Allowance for loan losses	(102,915)	(105,135)	(97,545)
Net loans	14,286,598	14,013,370	12,758,492
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Commercial	628,030	677,149	1,011,170
Loans and Leases Receivable, Gross, Consumer, Mortgage	308,618	324,008	378,192
Loans and Leases Receivable, Gross, Consumer, Installment, Other	539,313	573,372	717,693
Loans and Leases Receivable, Gross, Consumer, Home Equity	157,745	168,542	217,824
Loans and Leases Receivable, Gross	1,633,706	1,743,071	2,324,879
Allowance for loan losses	(4,423)	(3,877)	(7,493)
Net loans	1,629,283	1,739,194	2,317,386
Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Commercial	122,123	129,109	179,547
Loans and Leases Receivable, Gross, Consumer, Mortgage	34,594	35,568	40,470
Loans and Leases Receivable, Gross, Consumer, Installment, Other	1,942	2,077	4,781
Loans and Leases Receivable, Gross, Consumer, Home Equity	34,136	38,668	65,170
FDIC Indemnification Asset	9,436	9,947	20,005
Loans and Leases Receivable, Gross, Carrying Amount, Covered	202,231	215,369	309,973
Loans and Leases Receivable, Allowance, Covered	(44,599)	(44,679)	(41,514)
Loans and Leases Receivable, Net Reported Amount, Covered	$ 157,632	$ 170,690	$ 268,459

Loans (Schedule of Acquired Imp

Loans (Schedule of Acquired Impaired Loans, Accretable Yield and Carrying Amount) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Covered impaired loan
Accretable Yield
Balance at beginning of period	$ 22,908	$ 37,511
Accretion	(2,297)	(5,567)
Net reclassifications from nonaccretable to accretable	1,673	(56)
Disposals	(158)	(2,021)
Balance at end of period	22,126	29,867
Carrying Amount of Loans
Balance at beginning of period	130,648	232,452
Accretion	2,297	5,567
Payments received, net	(10,811)	(38,794)
Balance at end of period	122,134	199,225
Acquired Impaired Loans
Accretable Yield
Balance at beginning of period	89,823	119,450
Accretion	(8,902)	(11,218)
Net reclassifications from nonaccretable to accretable	7,753	12,995
Disposals	(3,230)	(2,471)
Balance at end of period	85,444	118,756
Carrying Amount of Loans
Balance at beginning of period	284,709	423,209
Accretion	8,902	11,218
Payments received, net	(36,459)	(46,114)
Balance at end of period	$ 257,152	$ 388,313

Loans (Covered Loan Loss Share

Loans (Covered Loan Loss Share Receivable) (Details) - Loss Share Receivable - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Loss Share Receivable Rollforward [Roll Forward]
Balance at beginning of period	$ 9,947	$ 22,033
Amortization	(348)	(2,187)
Increase/(decrease) due to impairment (recapture) on FDIC acquired loans	269	4,227
FDIC reimbursement	(192)	(4,013)
FDIC acquired loans paid in full	(240)	(55)
Balance at end of the period	9,436	$ 20,005
Single Family Loss Share Agreement
Loss Share Receivable Rollforward [Roll Forward]
Balance at end of the period	$ (9,400)

Loans (Schedules of Past Due Re

Loans (Schedules of Past Due Receivables) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Consumer Loans Guaranteed by Government	$ 2,300	$ 2,300	$ 2,400
FDIC Indemnification Asset	9,436	9,947	20,005
Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	88,192	83,520	58,809
Financing Receivable, Recorded Investment, Current	14,301,321	14,034,985	12,797,228
Financing Receivable, Net	14,389,513	14,118,505	12,856,037
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	9,361	8,022	7,914
Financing Receivable, Recorded Investment, Nonaccrual Status	73,701	44,105	46,085
Originated Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	14,576	13,623	6,886
Financing Receivable, Recorded Investment, Current	5,822,739	5,779,785	5,311,011
Financing Receivable, Net	5,837,315	5,793,408	5,317,897
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	274	236	498
Financing Receivable, Recorded Investment, Nonaccrual Status	35,500	23,123	18,838
Originated Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	21,372	15,140	9,059
Financing Receivable, Recorded Investment, Current	2,058,290	2,062,204	2,123,958
Financing Receivable, Net	2,079,662	2,077,344	2,133,017
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	2,420	153	150
Financing Receivable, Recorded Investment, Nonaccrual Status	18,216	4,503	9,640
Originated Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	7,376	1,846
Financing Receivable, Recorded Investment, Current	663,449	643,491
Financing Receivable, Net	670,825	645,337	580,978
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	3,010	482
Originated Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	19,308	26,682	18,666
Financing Receivable, Recorded Investment, Current	3,135,604	2,963,667	2,481,622
Financing Receivable, Net	3,154,912	2,990,349	2,500,288
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	3,178	3,519	3,332
Financing Receivable, Recorded Investment, Nonaccrual Status	2,554	2,178	3,016
Originated Loans | Commercial Construction Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due			0
Financing Receivable, Recorded Investment, Current			580,978
Financing Receivable, Net			580,978
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing			0
Financing Receivable, Recorded Investment, Nonaccrual Status			0
Originated Loans | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	255
Financing Receivable, Recorded Investment, Current	512,929	491,741	388,618
Financing Receivable, Net	512,929	491,741	388,873
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 | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	3,754	4,343	3,198
Financing Receivable, Recorded Investment, Current	1,250,955	1,244,095	1,131,040
Financing Receivable, Net	1,254,709	1,248,438	1,134,238
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	274	513	622
Financing Receivable, Recorded Investment, Nonaccrual Status	2,267	1,674	1,780
Originated Loans | Credit Card Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,183	2,575	1,592
Financing Receivable, Recorded Investment, Current	176,840	180,268	159,174
Financing Receivable, Net	179,023	182,843	160,766
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	339	725	312
Financing Receivable, Recorded Investment, Nonaccrual Status	554	545	523
Originated Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	19,623	19,311	19,153
Financing Receivable, Recorded Investment, Current	680,515	669,734	620,827
Financing Receivable, Net	700,138	689,045	639,980
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	2,876	2,876	3,000
Financing Receivable, Recorded Investment, Nonaccrual Status	11,600	11,600	12,288
Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	38,368	45,707	64,148
Financing Receivable, Recorded Investment, Current	1,595,338	1,697,364	2,260,731
Financing Receivable, Net	1,633,706	1,743,071	2,324,879
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	1,712	3,096	1,704
Financing Receivable, Recorded Investment, Nonaccrual Status	6,998	8,245	7,254
Acquired Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,896	3,678	5,563
Financing Receivable, Recorded Investment, Current	227,804	236,467	415,247
Financing Receivable, Net	230,700	240,145	420,810
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	145	13	44
Financing Receivable, Recorded Investment, Nonaccrual Status	766	782	700
Acquired Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	14,059	14,530	29,307
Financing Receivable, Recorded Investment, Current	377,804	416,361	554,765
Financing Receivable, Net	391,863	430,891	584,072
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	522	252
Financing Receivable, Recorded Investment, Nonaccrual Status	4,332	4,948	4,172
Acquired Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	718	733
Financing Receivable, Recorded Investment, Current	4,749	5,380
Financing Receivable, Net	5,467	6,113	6,288
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Acquired Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	5,295	7,362	7,302
Financing Receivable, Recorded Investment, Current	534,018	566,010	710,391
Financing Receivable, Net	539,313	573,372	717,693
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	289	236	521
Financing Receivable, Recorded Investment, Nonaccrual Status	600	835	746
Acquired Loans | Commercial Construction Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due			676
Financing Receivable, Recorded Investment, Current			5,612
Financing Receivable, Net			6,288
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing			0
Financing Receivable, Recorded Investment, Nonaccrual Status			0
Acquired Loans | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Net	0	0	0
Acquired Loans | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,592	3,285	5,566
Financing Receivable, Recorded Investment, Current	156,153	165,257	212,258
Financing Receivable, Net	157,745	168,542	217,824
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	260	644	462
Financing Receivable, Recorded Investment, Nonaccrual Status	320	514	639
Acquired Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	13,808	16,119	15,734
Financing Receivable, Recorded Investment, Current	294,810	307,889	362,458
Financing Receivable, Net	308,618	324,008	378,192
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	1,018	1,681	425
Financing Receivable, Recorded Investment, Nonaccrual Status	980	1,166	997
Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	43,360	45,608	78,262
Financing Receivable, Recorded Investment, Current	149,435	159,814	211,706
Financing Receivable, Net	192,795	205,422	289,968
Covered Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	949	1,054	5,525
Financing Receivable, Recorded Investment, Current	30,981	34,412	37,289
Financing Receivable, Net	31,930	35,466	42,814
Covered Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	28,331	29,151	49,654
Financing Receivable, Recorded Investment, Current	56,973	58,623	78,254
Financing Receivable, Net	85,304	87,774	127,908
Covered Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	3,133	3,761	6,906
Financing Receivable, Recorded Investment, Current	1,756	2,108	1,919
Financing Receivable, Net	4,889	5,869	8,825
Covered Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	110
Financing Receivable, Recorded Investment, Current	1,942	2,077	4,671
Financing Receivable, Net	1,942	2,077	4,781
Covered Loans | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Net	0	0	0
Covered Loans | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	3,708	4,199	6,506
Financing Receivable, Recorded Investment, Current	30,428	34,469	58,664
Financing Receivable, Net	34,136	38,668	65,170
Covered Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	7,239	7,443	9,561
Financing Receivable, Recorded Investment, Current	27,355	28,125	30,909
Financing Receivable, Net	34,594	35,568	40,470
Financing Receivables, 30 to 59 Days Past Due | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	38,972	51,358	27,845
Financing Receivables, 30 to 59 Days Past Due | Originated Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,485	4,684	525
Financing Receivables, 30 to 59 Days Past Due | Originated Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	3,211	12,880	4,401
Financing Receivables, 30 to 59 Days Past Due | Originated Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	6,891	1,360	0
Financing Receivables, 30 to 59 Days Past Due | Originated Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	13,150	17,934	11,294
Financing Receivables, 30 to 59 Days Past Due | Originated Loans | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	255
Financing Receivables, 30 to 59 Days Past Due | Originated Loans | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,100	1,952	1,480
Financing Receivables, 30 to 59 Days Past Due | Originated Loans | Credit Card Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	857	1,449	654
Financing Receivables, 30 to 59 Days Past Due | Originated Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	11,278	11,099	9,236
Financing Receivables, 30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	17,787	18,687	22,176
Financing Receivables, 30 to 59 Days Past Due | Acquired Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,092	311	66
Financing Receivables, 30 to 59 Days Past Due | Acquired Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,580	3,192	4,507
Financing Receivables, 30 to 59 Days Past Due | Acquired Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due | Acquired Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	3,869	5,059	4,859
Financing Receivables, 30 to 59 Days Past Due | Acquired Loans | Commercial Construction Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due			0
Financing Receivables, 30 to 59 Days Past Due | Acquired Loans | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,002	1,365	2,850
Financing Receivables, 30 to 59 Days Past Due | Acquired Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	9,244	8,760	9,894
Financing Receivables, 30 to 59 Days Past Due | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	6,747	7,142	9,233
Financing Receivables, 30 to 59 Days Past Due | Covered Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	815
Financing Receivables, 30 to 59 Days Past Due | Covered Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	288	296	413
Financing Receivables, 30 to 59 Days Past Due | Covered Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivables, 30 to 59 Days Past Due | Covered Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivables, 30 to 59 Days Past Due | Covered Loans | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,969	2,230	2,291
Financing Receivables, 30 to 59 Days Past Due | Covered Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	4,490	4,616	5,714
Financing Receivables, 60 to 89 Days Past Due | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	10,116	7,869	8,046
Financing Receivables, 60 to 89 Days Past Due | Originated Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	3,464	115	515
Financing Receivables, 60 to 89 Days Past Due | Originated Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,137	0	1,177
Financing Receivables, 60 to 89 Days Past Due | Originated Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivables, 60 to 89 Days Past Due | Originated Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,591	4,828	3,215
Financing Receivables, 60 to 89 Days Past Due | Originated Loans | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivables, 60 to 89 Days Past Due | Originated Loans | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	897	913	323
Financing Receivables, 60 to 89 Days Past Due | Originated Loans | Credit Card Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	483	494	301
Financing Receivables, 60 to 89 Days Past Due | Originated Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,544	1,519	2,515
Financing Receivables, 60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,955	4,268	4,967
Financing Receivables, 60 to 89 Days Past Due | Acquired Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	75	31	131
Financing Receivables, 60 to 89 Days Past Due | Acquired Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	918	1,681	1,380
Financing Receivables, 60 to 89 Days Past Due | Acquired Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due | Acquired Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	793	1,329	1,322
Financing Receivables, 60 to 89 Days Past Due | Acquired Loans | Commercial Construction Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due			0
Financing Receivables, 60 to 89 Days Past Due | Acquired Loans | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	120	660	1,544
Financing Receivables, 60 to 89 Days Past Due | Acquired Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	49	567	590
Financing Receivables, 60 to 89 Days Past Due | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	557	578	6,199
Financing Receivables, 60 to 89 Days Past Due | Covered Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	144
Financing Receivables, 60 to 89 Days Past Due | Covered Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	344	354	5,218
Financing Receivables, 60 to 89 Days Past Due | Covered Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivables, 60 to 89 Days Past Due | Covered Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	110
Financing Receivables, 60 to 89 Days Past Due | Covered Loans | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	46	52	564
Financing Receivables, 60 to 89 Days Past Due | Covered Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	167	172	163
Financing Receivables, Equal to Greater than 90 Days Past Due | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	39,104	24,293	22,918
Financing Receivables, Equal to Greater than 90 Days Past Due | Originated Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	8,627	8,824	5,846
Financing Receivables, Equal to Greater than 90 Days Past Due | Originated Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	17,024	2,260	3,481
Financing Receivables, Equal to Greater than 90 Days Past Due | Originated Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	485	486	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Originated Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	3,567	3,920	4,157
Financing Receivables, Equal to Greater than 90 Days Past Due | Originated Loans | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Originated Loans | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,757	1,478	1,395
Financing Receivables, Equal to Greater than 90 Days Past Due | Originated Loans | Credit Card Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	843	632	637
Financing Receivables, Equal to Greater than 90 Days Past Due | Originated Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	6,801	6,693	7,402
Financing Receivables, Equal to Greater than 90 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	18,626	22,752	37,005
Financing Receivables, Equal to Greater than 90 Days Past Due | Acquired Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,729	3,336	5,366
Financing Receivables, Equal to Greater than 90 Days Past Due | Acquired Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	10,561	9,657	23,420
Financing Receivables, Equal to Greater than 90 Days Past Due | Acquired Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	718	733
Financing Receivables, Equal to Greater than 90 Days Past Due | Acquired Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	633	974	1,121
Financing Receivables, Equal to Greater than 90 Days Past Due | Acquired Loans | Commercial Construction Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due			676
Financing Receivables, Equal to Greater than 90 Days Past Due | Acquired Loans | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	470	1,260	1,172
Financing Receivables, Equal to Greater than 90 Days Past Due | Acquired Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	4,515	6,792	5,250
Financing Receivables, Equal to Greater than 90 Days Past Due | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	36,056	37,888	62,830
Financing Receivables, Equal to Greater than 90 Days Past Due | Covered Loans | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	949	1,054	4,566
Financing Receivables, Equal to Greater than 90 Days Past Due | Covered Loans | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	27,699	28,501	44,023
Financing Receivables, Equal to Greater than 90 Days Past Due | Covered Loans | Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	3,133	3,761	6,906
Financing Receivables, Equal to Greater than 90 Days Past Due | Covered Loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Covered Loans | Home Equity Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,693	1,917	3,651
Financing Receivables, Equal to Greater than 90 Days Past Due | Covered Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 2,582	$ 2,655	$ 3,684

Loans (Financing Receivables Cr

Loans (Financing Receivables Credit Quality Indicators) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Originated Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	$ 14,389,513	$ 14,118,505	$ 12,856,037
Originated Loans | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	5,837,315	5,793,408	5,317,897
Originated Loans | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	2,079,662	2,077,344	2,133,017
Originated Loans | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	670,825	645,337	580,978
Originated Loans | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	512,929	491,741	388,873
Originated Loans | Commercial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	9,100,731	9,007,830	8,420,765
Originated Loans | Grade One | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	68,185	60,440	59,380
Originated Loans | Grade One | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	757	773	667
Originated Loans | Grade One | Construction Loans
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	12,613	12,732	13,052
Originated Loans | Grade One | Commercial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	81,555	73,945	73,099
Originated Loans | Grade Two | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	397,855	353,581	191,008
Originated Loans | Grade Two | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	818	831	3,368
Originated Loans | Grade Two | Construction Loans
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	43,507	69,258	5,782
Originated Loans | Grade Two | Commercial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	442,180	423,670	200,158
Originated Loans | Grade Three | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	1,317,058	1,371,850	1,405,007
Originated Loans | Grade Three | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	310,816	319,987	339,027
Originated Loans | Grade Three | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	52,039	59,182	62,821
Originated Loans | Grade Three | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	80,042	49,956	69,686
Originated Loans | Grade Three | Commercial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	1,759,955	1,800,975	1,876,541
Originated Loans | Grade Four | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	3,762,793	3,756,333	3,504,600
Originated Loans | Grade Four | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	1,719,833	1,697,261	1,724,516
Originated Loans | Grade Four | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	597,571	569,098	516,852
Originated Loans | Grade Four | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	336,402	344,763	297,790
Originated Loans | Grade Four | Commercial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	6,416,599	6,367,455	6,043,758
Originated Loans | Grade Five | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	141,456	124,140	103,432
Originated Loans | Grade Five | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	9,924	18,388	29,034
Originated Loans | Grade Five | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	2,401	7,193	942
Originated Loans | Grade Five | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	32,416	7,858	1,307
Originated Loans | Grade Five | Commercial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	186,197	157,579	134,715
Originated Loans | Grade Six | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	146,380	124,483	54,470
Originated Loans | Grade Six | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	37,514	40,105	36,405
Originated Loans | Grade Six | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	18,814	9,864	363
Originated Loans | Grade Six | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	7,949	7,174	1,256
Originated Loans | Grade Six | Commercial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	210,657	181,626	92,494
Originated Loans | Grade Seven | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	3,588	2,581	0
Originated Loans | Grade Seven | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	(1)	0
Originated Loans | Grade Seven | Construction Loans
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	3,588	2,580	0
Acquired Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	1,633,706	1,743,071	2,324,879
Acquired Loans | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	230,700	240,145	420,810
Acquired Loans | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	391,863	430,891	584,072
Acquired Loans | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	5,467	6,113	6,288
Acquired Loans | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Acquired Loans | Commercial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	628,030	677,149	1,011,170
Acquired Loans | Grade One | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	346	1,069
Acquired Loans | Grade One | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Acquired Loans | Grade One | Construction Loans
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	346	1,069
Acquired Loans | Grade Two | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	596	0	0
Acquired Loans | Grade Two | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	615	0	0
Acquired Loans | Grade Two | Construction Loans
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	1,211	0	0
Acquired Loans | Grade Three | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	27,818	15,548	22,875
Acquired Loans | Grade Three | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	23,221	27,387	24,834
Acquired Loans | Grade Three | Construction Loans
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	51,039	42,935	47,709
Acquired Loans | Grade Four | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	169,906	200,736	359,751
Acquired Loans | Grade Four | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	327,406	361,518	496,213
Acquired Loans | Grade Four | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	4,749	5,380	5,612
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	502,061	567,634	861,576
Acquired Loans | Grade Five | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	24,577	11,735	15,363
Acquired Loans | Grade Five | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	11,663	12,546	21,487
Acquired Loans | Grade Five | Construction Loans
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	36,240	24,281	36,850
Acquired Loans | Grade Six | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	7,803	11,780	21,752
Acquired Loans | Grade Six | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	28,958	29,440	41,538
Acquired Loans | Grade Six | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	718	733	676
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	37,479	41,953	63,966
Acquired Loans | Grade Seven | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Seven | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Acquired Loans | Grade Seven | Construction Loans
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Covered Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	192,795	205,422	289,968
Covered Loans | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	31,930	35,466	42,814
Covered Loans | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	85,304	87,774	127,908
Covered Loans | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	4,889	5,869	8,825
Covered Loans | Commercial Leases Financing Receivable
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Covered Loans | Commercial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	122,123	129,109	179,547
Covered Loans | Grade One | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Covered Loans | Grade One | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Covered Loans | Grade One | Construction Loans
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
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	965	1,072	1,040
Covered Loans | Grade Two | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Covered Loans | Grade Two | Construction Loans
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	965	1,072	1,040
Covered Loans | Grade Three | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Covered Loans | Grade Three | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	6,807	7,004	0
Covered Loans | Grade Three | Construction Loans
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	6,807	7,004	0
Covered Loans | Grade Four | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	28,483	31,637	33,352
Covered Loans | Grade Four | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	48,512	49,917	74,128
Covered Loans | Grade Four | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	682	819	579
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	77,677	82,373	108,059
Covered Loans | Grade Five | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	266	295	39
Covered Loans | Grade Five | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	2,134
Covered Loans | Grade Five | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	266	295	2,173
Covered Loans | Grade Six | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	2,216	2,462	8,383
Covered Loans | Grade Six | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	29,985	30,853	51,646
Covered Loans | Grade Six | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	4,207	5,050	8,246
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	36,408	38,365	68,275
Covered Loans | Grade Seven | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Covered Loans | Grade Seven | Real Estate Loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Covered Loans | Grade Seven | Construction Loans
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
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
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	$ 0	$ 0	$ 0

Loans (Narrative) (Details)

Loans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Commercial	$ 9,850,884	$ 9,611,482	$ 9,814,088
Loans and Leases Receivable, Gross	$ 16,225,450	15,490,889	16,076,945
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	$ (4,900)	(4,600)	(4,100)
Days past due for nonaccrual status credit card loans	120 days
Acquired Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	$ 370,600		548,200
Net reclassifications from nonaccretable to accretable	7,753	12,995
Covered impaired loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered	306,600		404,400
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Commercial	628,030	1,011,170	677,149
Loans and Leases Receivable, Gross	1,633,706	2,324,879	$ 1,743,071
Covered impaired loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net reclassifications from nonaccretable to accretable	1,673	$ (56)
George Washington and Midwest Acquisition | Non-Single Family Loss Share Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	122,100
George Washington and Midwest Acquisition | Single Family Loss Share Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered	$ 70,700

Allowance for Loan Losses (Sche

Allowance for Loan Losses (Schedule of Credit Losses Related to Originated Financing Receivables, Current) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	$ (600)	$ (2,200)
Provision/ (recapture) for loan losses	7,809	8,248
Originated Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	105,135	95,696
Financing Receivable, Allowance for Credit Losses, Write-downs	(13,014)	(8,567)
Recoveries	5,384	4,380
Provision/ (recapture) for loan losses	5,410	6,036
Balance at end of the period	102,915	97,545
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			$ 9,290	$ 14,349	$ 13,297
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment			93,625	90,786	84,248
Financing Receivable, Allowance for Credit Losses	105,135	95,696	102,915	105,135	97,545
Financing Receivable, Individually Evaluated for Impairment			142,655	129,038	110,943
Financing Receivable, Collectively Evaluated for Impairment			14,246,858	13,989,467	12,745,094
Financing Receivable, Net			14,389,513	14,118,505	12,856,037
Originated Loans | Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	44,760	37,375
Financing Receivable, Allowance for Credit Losses, Write-downs	(3,209)	(510)
Recoveries	532	341
Provision/ (recapture) for loan losses	2,406	2,632
Balance at end of the period	44,489	39,838
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			6,194	11,837	10,042
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment			38,295	32,923	29,796
Financing Receivable, Allowance for Credit Losses	44,760	37,375	44,489	44,760	39,838
Financing Receivable, Individually Evaluated for Impairment			46,996	43,818	35,792
Financing Receivable, Collectively Evaluated for Impairment			5,790,319	5,749,590	5,282,105
Financing Receivable, Net			5,837,315	5,793,408	5,317,897
Originated Loans | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	9,631	10,492
Financing Receivable, Allowance for Credit Losses, Write-downs	(109)	(215)
Recoveries	24	0
Provision/ (recapture) for loan losses	(2,302)	(1,464)
Balance at end of the period	7,244	8,813
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			567	128	317
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment			6,677	9,503	8,496
Financing Receivable, Allowance for Credit Losses	9,631	10,492	7,244	9,631	8,813
Financing Receivable, Individually Evaluated for Impairment			24,013	16,614	15,000
Financing Receivable, Collectively Evaluated for Impairment			2,055,649	2,060,730	2,118,017
Financing Receivable, Net			2,079,662	2,077,344	2,133,017
Originated Loans | Construction Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	1,594	2,202
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Recoveries	2	1
Provision/ (recapture) for loan losses	(59)	(451)
Balance at end of the period	1,537	1,752
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment			1,537	1,594	1,752
Financing Receivable, Allowance for Credit Losses	1,594	2,202	1,537	1,594	1,752
Financing Receivable, Individually Evaluated for Impairment			0	0	0
Financing Receivable, Collectively Evaluated for Impairment			670,825	645,337	580,978
Financing Receivable, Net			670,825	645,337	580,978
Originated Loans | Finance Leases Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	1,313	674
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Recoveries	19	4
Provision/ (recapture) for loan losses	167	(49)
Balance at end of the period	1,499	629
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment			1,499	1,313	629
Financing Receivable, Allowance for Credit Losses	1,313	674	1,499	1,313	629
Financing Receivable, Individually Evaluated for Impairment			0	0	0
Financing Receivable, Collectively Evaluated for Impairment			512,929	491,741	388,873
Financing Receivable, Net			512,929	491,741	388,873
Originated Loans | Installment
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	14,183	12,918
Financing Receivable, Allowance for Credit Losses, Write-downs	(6,769)	(5,055)
Recoveries	3,806	3,020
Provision/ (recapture) for loan losses	3,444	2,475
Balance at end of the period	14,664	13,358
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			1,081	1,009	1,005
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment			13,583	13,174	12,353
Financing Receivable, Allowance for Credit Losses	14,183	12,918	14,664	14,183	13,358
Financing Receivable, Individually Evaluated for Impairment			40,134	36,904	26,882
Financing Receivable, Collectively Evaluated for Impairment			3,114,778	2,953,445	2,473,406
Financing Receivable, Net			3,154,912	2,990,349	2,500,288
Originated Loans | Home Equity Line of Credit
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	20,094	19,324
Financing Receivable, Allowance for Credit Losses, Write-downs	(1,027)	(911)
Recoveries	624	613
Provision/ (recapture) for loan losses	(163)	407
Balance at end of the period	19,528	19,433
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			185	188	254
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment			19,343	19,906	19,179
Financing Receivable, Allowance for Credit Losses	20,094	19,324	19,528	20,094	19,433
Financing Receivable, Individually Evaluated for Impairment			7,720	7,080	7,632
Financing Receivable, Collectively Evaluated for Impairment			1,246,989	1,241,358	1,126,606
Financing Receivable, Net			1,254,709	1,248,438	1,134,238
Originated Loans | Credit Card Receivable
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	8,831	7,966
Financing Receivable, Allowance for Credit Losses, Write-downs	(1,450)	(1,452)
Recoveries	357	366
Provision/ (recapture) for loan losses	853	921
Balance at end of the period	8,591	7,801
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			225	243	263
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment			8,366	8,588	7,538
Financing Receivable, Allowance for Credit Losses	8,831	7,966	8,591	8,831	7,801
Financing Receivable, Individually Evaluated for Impairment			687	717	815
Financing Receivable, Collectively Evaluated for Impairment			178,336	182,126	159,951
Financing Receivable, Net			179,023	182,843	160,766
Originated Loans | Residential Mortgages
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	4,729	4,745
Financing Receivable, Allowance for Credit Losses, Write-downs	(450)	(424)
Recoveries	20	35
Provision/ (recapture) for loan losses	1,064	1,565
Balance at end of the period	5,363	5,921
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			1,038	944	1,416
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment			4,325	3,785	4,505
Financing Receivable, Allowance for Credit Losses	$ 4,729	$ 4,745	5,363	4,729	5,921
Financing Receivable, Individually Evaluated for Impairment			23,105	23,905	24,822
Financing Receivable, Collectively Evaluated for Impairment			677,033	665,140	615,158
Financing Receivable, Net			$ 700,138	$ 689,045	$ 639,980

Allowance for Loan Losses (Sc51

Allowance for Loan Losses (Schedule of Credit Losses Related to Acquired Financing Receivables, Current) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision/(recapture) for loan losses	$ 7,809	$ 8,248
Acquired Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of the period	3,877	7,457
Charge-offs	0	0
Recoveries	0	0
Provision/(recapture) for loan losses	546	36
Balance at end of the period	$ 4,423	$ 7,493

Allowance for Loan Losses (Sc52

Allowance for Loan Losses (Schedule of Credit Losses Related to Covered Financing Receivables, Current Period) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Provision/(recapture) for loan losses	$ 7,809	$ 8,248
Covered impaired loan
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of the period	44,679	40,496
Net provision/(recapture) of loan losses before benefit attributable to FDIC loss share agreements	1,537	4,225
Net (benefit)/recapture attributable to FDIC loss share agreements	(269)	(4,227)
Provision/(recapture) for loan losses	1,268	(2)
Increase/(decrease) in loss share receivable	269	4,227
Charge-offs	(1,617)	(3,207)
Balance at end of the period	$ 44,599	$ 41,514

Allowance for Loan Losses (Impa

Allowance for Loan Losses (Impaired Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance			$ 11,128
Credit Card Receivable
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance			243
Residential Mortgages
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance			944
Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance			6,052
Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance			2,554
Construction Loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance			0
Installment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance			1,054
Home Equity Line of Credit
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance			281
Originated Loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 66,032		50,141
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	76,978		57,809
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	58,311		55,051
Impaired Financing Receivable, with Related Allowance, Recorded Investment	76,623		78,897
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	77,026		85,211
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	9,290	$ 13,297	14,349
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	68,869		62,887
Impaired Financing Receivable, Recorded Investment	142,655	110,943	129,038
Impaired Financing Receivable, Unpaid Principal Balance	154,004	127,631	143,020
Impaired Financing Receivable, Related Allowance	9,290	13,297	14,349
Impaired Financing Receivable, Average Recorded Investment	127,180	105,804	117,938
Originated Loans | Credit Card Receivable
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	13	21	21
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	13	21	21
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	20	23	20
Impaired Financing Receivable, with Related Allowance, Recorded Investment	674	794	696
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	674	794	696
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	225	263	243
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	725	823	757
Originated Loans | Residential Mortgages
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	11,184		11,550
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	13,562		13,901
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	11,775		11,979
Impaired Financing Receivable, with Related Allowance, Recorded Investment	11,921		12,355
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	12,036		12,458
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,038	1,416	944
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	12,394		12,619
Originated Loans | Residential Portfolio Segment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		12,424
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		15,125
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		12,488
Impaired Financing Receivable, with Related Allowance, Recorded Investment		12,398
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		12,487
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		1,416
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		12,414
Originated Loans | Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	32,520	28,513	21,066
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	38,568	35,307	23,854
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	30,827	25,006	27,215
Impaired Financing Receivable, with Related Allowance, Recorded Investment	14,476	7,279	22,752
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	14,617	7,350	28,881
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	6,194	10,042	11,837
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	14,117	5,984	11,284
Originated Loans | Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	20,598	9,343	15,465
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	22,604	15,478	17,456
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	13,776	9,634	13,031
Impaired Financing Receivable, with Related Allowance, Recorded Investment	3,415	5,657	1,149
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	3,447	5,664	1,173
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	567	317	128
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	2,435	5,668	3,037
Originated Loans | Construction Loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0	0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	0	0
Originated Loans | Finance Leases Portfolio Segment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0
Originated Loans | Home equity lines
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		977
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		1,222
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		987
Impaired Financing Receivable, with Related Allowance, Recorded Investment		6,655
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		6,655
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		254
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		6,715
Originated Loans | Total impaired loans with no related allowance
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		53,124
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		69,581
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		50,019
Originated Loans | Total impaired loans with a related allowance
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		57,819
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		58,050
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		13,297
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		55,785
Originated Loans | Installment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,236	1,846	1,369
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,493	2,428	1,658
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,162	1,881	1,807
Impaired Financing Receivable, with Related Allowance, Recorded Investment	38,898	25,036	35,535
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	39,013	25,100	35,592
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,081	1,005	1,009
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	32,499	24,181	28,808
Originated Loans | Home Equity Line of Credit
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	481		670
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	738		919
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	751		999
Impaired Financing Receivable, with Related Allowance, Recorded Investment	7,239		6,410
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	7,239		6,411
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	185	$ 254	188
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	$ 6,699		$ 6,382

Allowance for Loan Losses (Trou

Allowance for Loan Losses (Troubled Debt Restructuring on Financing Receivables) (Details) $ in Thousands	Mar. 31, 2016USD ($)loans	Dec. 31, 2015USD ($)loans	Mar. 31, 2015USD ($)
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	2,371	2,402	2,509
Recorded Investment	$ 151,764	$ 160,928	$ 135,631
Unpaid Principal Balance	$ 156,734	$ 165,694	$ 178,117
Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	2,034	2,054	2,150
Recorded Investment	$ 113,981	$ 116,364	$ 89,150
Unpaid Principal Balance	$ 119,889	$ 122,044	$ 104,823
Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	257	262	247
Recorded Investment	$ 14,400	$ 19,518	$ 13,146
Unpaid Principal Balance	$ 15,060	$ 20,026	13,692
Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	80	86
Recorded Investment	$ 23,383	$ 25,046	$ 9,094
Unpaid Principal Balance	$ 21,785	$ 23,624
Covered TDR Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end			112
Recorded Investment			$ 33,335
Unpaid Principal Balance			$ 59,602
Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	27	27	56
Recorded Investment	$ 28,160	$ 40,698	$ 16,925
Unpaid Principal Balance	$ 28,980	$ 41,351	$ 25,024
Commercial and Industrial | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	27	26	47
Recorded Investment	$ 28,160	$ 33,087	$ 16,923
Unpaid Principal Balance	$ 28,980	$ 33,740	$ 23,666
Commercial and Industrial | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	0	1	1
Recorded Investment	$ 0	$ 7,611	$ 2
Unpaid Principal Balance	$ 0	$ 7,611	$ 3
Commercial and Industrial | Covered Loans Commercial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	0	0	8
Recorded Investment	$ 0	$ 0	$ 0
Unpaid Principal Balance	$ 0	$ 0	$ 1,355
Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	30	30	91
Recorded Investment	$ 30,876	$ 29,645	$ 38,424
Unpaid Principal Balance	$ 31,434	$ 30,171	$ 59,556
Commercial Real Estate | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	22	24	64
Recorded Investment	$ 14,175	$ 14,671	$ 12,076
Unpaid Principal Balance	$ 16,141	$ 16,648	$ 17,325
Commercial Real Estate | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	5	3	3
Recorded Investment	$ 3,525	$ 918	$ 2,453
Unpaid Principal Balance	$ 3,827	$ 1,044	$ 2,635
Commercial Real Estate | Covered Loans Commercial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	3	3	24
Recorded Investment	$ 13,176	$ 14,056	$ 23,895
Unpaid Principal Balance	$ 11,466	$ 12,479	$ 39,596
Commercial | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end			4
Recorded Investment			$ 2,455
Unpaid Principal Balance			$ 2,638
Construction Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	1	1	40
Recorded Investment	$ 580	$ 593	$ 346
Unpaid Principal Balance	$ 677	$ 682	$ 9,552
Construction Loans | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	0	0	31
Recorded Investment	$ 0	$ 0	$ 0
Unpaid Principal Balance	$ 0	$ 0	$ 0
Construction Loans | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	0
Recorded Investment	$ 0
Unpaid Principal Balance	$ 0
Construction Loans | Covered Loans Commercial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	1	1	9
Recorded Investment	$ 580	$ 593	$ 346
Unpaid Principal Balance	$ 677	$ 682	$ 9,552
Commercial Loan
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	58	58	187
Recorded Investment	$ 59,616	$ 70,936	$ 55,695
Unpaid Principal Balance	$ 61,091	$ 72,204	$ 94,132
Commercial Loan | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	49	50	142
Recorded Investment	$ 42,335	$ 47,758	$ 28,999
Unpaid Principal Balance	$ 45,121	$ 50,388	40,991
Commercial Loan | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	5	4
Recorded Investment	$ 3,525	$ 8,529	$ 2,455
Unpaid Principal Balance	$ 3,827	$ 8,655
Commercial Loan | Covered Loans Commercial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	4	4	41
Recorded Investment	$ 13,756	$ 14,649	$ 24,241
Unpaid Principal Balance	$ 12,143	$ 13,161	50,503
Commercial Loan | Covered TDR Loans
Financing Receivable, Modifications [Line Items]
Recorded Investment			$ 24,241
Consumer Loan
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	2,313	2,344	2,322
Recorded Investment	$ 92,148	$ 89,992	$ 79,936
Unpaid Principal Balance	$ 95,643	$ 93,490	$ 83,985
Consumer Loan | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	1,985	2,004	2,008
Recorded Investment	$ 71,646	$ 68,606	$ 60,151
Unpaid Principal Balance	$ 74,768	$ 71,656	$ 63,832
Consumer Loan | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	252	258	243
Recorded Investment	$ 10,875	$ 10,989	$ 10,691
Unpaid Principal Balance	$ 11,233	$ 11,371	$ 11,054
Consumer Loan | Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	76	82	71
Recorded Investment	$ 9,627	$ 10,397	$ 9,094
Unpaid Principal Balance	$ 9,642	$ 10,463	$ 9,099
Residential Mortgages
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	338	344	347
Recorded Investment	$ 25,155	$ 26,241	$ 27,193
Unpaid Principal Balance	$ 27,875	$ 28,923	$ 30,200
Residential Mortgages | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	307	312	316
Recorded Investment	$ 23,105	$ 23,905	$ 24,822
Unpaid Principal Balance	$ 25,598	$ 26,359	$ 27,612
Residential Mortgages | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	31	31	30
Recorded Investment	$ 2,050	$ 2,154	$ 2,186
Unpaid Principal Balance	$ 2,277	$ 2,382	2,403
Residential Mortgages | Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	0	1
Recorded Investment	$ 0	$ 182	$ 185
Unpaid Principal Balance	$ 0	$ 182
Credit Card Receivable
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	201	212	230
Recorded Investment	$ 687	$ 717	$ 815
Unpaid Principal Balance	$ 687	$ 717	$ 815
Credit Card Receivable | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	201	212	230
Recorded Investment	$ 687	$ 717	$ 815
Unpaid Principal Balance	$ 687	$ 717	$ 815
Home Equity Line of Credit
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	500	514	508
Recorded Investment	$ 24,855	$ 25,013	$ 23,851
Unpaid Principal Balance	$ 25,191	$ 25,389	$ 24,161
Home Equity Line of Credit | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	253	257	276
Recorded Investment	$ 7,720	$ 7,080	$ 7,632
Unpaid Principal Balance	$ 7,977	$ 7,330	$ 7,877
Home Equity Line of Credit | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	171	176	162
Recorded Investment	$ 7,508	$ 7,718	$ 7,310
Unpaid Principal Balance	$ 7,572	$ 7,778	$ 7,370
Home Equity Line of Credit | Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	76	81	70
Recorded Investment	$ 9,627	$ 10,215	$ 8,909
Unpaid Principal Balance	$ 9,642	$ 10,281	$ 8,914
Residential Real Estate | Covered TDR Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end			1
Recorded Investment			$ 185
Unpaid Principal Balance			$ 185
Installment
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	1,274	1,274	1,237
Recorded Investment	$ 41,451	$ 38,021	$ 28,077
Unpaid Principal Balance	$ 41,890	$ 38,461	$ 28,809
Installment | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	1,224	1,223	1,186
Recorded Investment	$ 40,134	$ 36,904	$ 26,882
Unpaid Principal Balance	$ 40,506	$ 37,250	$ 27,528
Installment | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end	50	51	51
Recorded Investment	$ 1,317	$ 1,117	$ 1,195
Unpaid Principal Balance	$ 1,384	$ 1,211	$ 1,281

Allowance for Loan Losses (Accr

Allowance for Loan Losses (Accruing and Non-Accruing Troubled Debt Restructurings) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	$ 151,764	$ 160,928	$ 135,631
Impaired Financing Receivable, Related Allowance		11,128
Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	14,301,321	14,034,985	12,797,228
Financing Receivable, Recorded Investment, Past Due	88,192	83,520	58,809
Financing Receivable, Net	14,389,513	14,118,505	12,856,037
Recorded Investment	113,981	116,364	89,150
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	9,290	14,349	13,297
Impaired Financing Receivable, Related Allowance	9,290	14,349	13,297
Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,595,338	1,697,364	2,260,731
Financing Receivable, Recorded Investment, Past Due	38,368	45,707	64,148
Financing Receivable, Net	1,633,706	1,743,071	2,324,879
Recorded Investment	14,400	19,518	13,146
Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	23,383	25,046	9,094
Impaired Financing Receivable, Related Allowance		23
Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			33,335
Impaired Financing Receivable, Related Allowance		2,356
Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	94,704	115,149	85,962
Financing Receivable, Recorded Investment, Past Due	6,280	21,461	30,155
Financing Receivable, Net	100,984	136,610	116,117
Accruing TDRs | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	72,884	87,694	68,990
Financing Receivable, Recorded Investment, Past Due	5,744	6,298	4,378
Financing Receivable, Net	78,628	93,992	73,368
Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	12,425	16,615	9,084
Financing Receivable, Recorded Investment, Past Due	355	1,037	597
Financing Receivable, Net	12,780	17,652	9,681
Accruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current		10,247	7,888
Financing Receivable, Recorded Investment, Past Due		70	939
Financing Receivable, Net		10,317	8,827
Accruing TDRs | Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	9,395	10,840	7,888
Financing Receivable, Recorded Investment, Past Due	181	14,126	25,180
Financing Receivable, Net	9,576	24,966	33,068
Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	18,081	12,713	13,081
Financing Receivable, Recorded Investment, Past Due	32,699	11,605	6,433
Financing Receivable, Net	50,780	24,318	19,514
Nonaccruing TDRs | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	15,956	11,110	11,083
Financing Receivable, Recorded Investment, Past Due	19,397	11,262	4,699
Financing Receivable, Net	35,353	22,372	15,782
Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,494	1,597	1,731
Financing Receivable, Recorded Investment, Past Due	126	269	1,734
Financing Receivable, Net	1,620	1,866	3,465
Nonaccruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current		6	267
Financing Receivable, Recorded Investment, Past Due		74	0
Financing Receivable, Net		80	267
Nonaccruing TDRs | Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	631	6	267
Financing Receivable, Recorded Investment, Past Due	13,176	74	0
Financing Receivable, Net	13,807	80	267
Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Impaired Financing Receivable, Related Allowance	11,243		5,661
Total Tdr Allowance | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	113,981	116,364
Impaired Financing Receivable, Related Allowance	8,743	8,456	3,133
Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	14,400	19,518
Impaired Financing Receivable, Related Allowance	130	316	185
Total Tdr Allowance | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Impaired Financing Receivable, Related Allowance			24
Total Tdr Allowance | Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	23,383	25,046
Impaired Financing Receivable, Related Allowance	2,370		2,343
Commercial and Industrial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	28,160	40,698	16,925
Impaired Financing Receivable, Related Allowance		6,052
Commercial and Industrial | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			16,923
Commercial and Industrial | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	5,822,739	5,779,785	5,311,011
Financing Receivable, Recorded Investment, Past Due	14,576	13,623	6,886
Financing Receivable, Net	5,837,315	5,793,408	5,317,897
Recorded Investment	28,160	33,087	16,923
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	6,194	11,837	10,042
Commercial and Industrial | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	227,804	236,467	415,247
Financing Receivable, Recorded Investment, Past Due	2,896	3,678	5,563
Financing Receivable, Net	230,700	240,145	420,810
Recorded Investment	0	7,611	2
Commercial and Industrial | Covered Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	0	0	0
Commercial and Industrial | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment		0	0
Impaired Financing Receivable, Related Allowance		0
Commercial and Industrial | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	13,306	30,177	16,558
Financing Receivable, Recorded Investment, Past Due	1,168	107	0
Financing Receivable, Net	14,474	30,284	16,558
Commercial and Industrial | Accruing TDRs | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	13,306	22,566	16,558
Financing Receivable, Recorded Investment, Past Due	1,168	107	0
Financing Receivable, Net	14,474	22,673	16,558
Commercial and Industrial | Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	7,611	0
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	0	7,611	0
Commercial and Industrial | Accruing TDRs | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0	0
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	0	0	0
Commercial and Industrial | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	7,741	4,229	2
Financing Receivable, Recorded Investment, Past Due	5,945	6,185	365
Financing Receivable, Net	13,686	10,414	367
Commercial and Industrial | Nonaccruing TDRs | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	7,741	4,229	0
Financing Receivable, Recorded Investment, Past Due	5,945	6,185	365
Financing Receivable, Net	13,686	10,414	365
Commercial and Industrial | Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0	2
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	0	0	2
Commercial and Industrial | Nonaccruing TDRs | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0	0
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	0	0	0
Commercial and Industrial | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	28,160
Impaired Financing Receivable, Related Allowance	6,194		126
Commercial and Industrial | Total Tdr Allowance | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	28,160	33,087
Impaired Financing Receivable, Related Allowance	6,194	6,052	124
Commercial and Industrial | Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	0	7,611
Impaired Financing Receivable, Related Allowance	0	0	2
Commercial and Industrial | Total Tdr Allowance | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	0
Impaired Financing Receivable, Related Allowance	0		0
Commercial Loan
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	59,616	70,936	55,695
Impaired Financing Receivable, Related Allowance		8,606
Commercial Loan | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			28,999
Commercial Loan | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	42,335	47,758	28,999
Commercial Loan | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	3,525	8,529	2,455
Commercial Loan | Covered Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	13,756	14,649	24,241
Commercial Loan | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment		14,649
Impaired Financing Receivable, Related Allowance		2,333
Commercial Loan | Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			24,241
Commercial Loan | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	16,337	41,041	22,589
Financing Receivable, Recorded Investment, Past Due	3,415	16,410	25,734
Financing Receivable, Net	19,752	57,451	48,323
Commercial Loan | Accruing TDRs | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	13,579	32,837	22,589
Financing Receivable, Recorded Investment, Past Due	3,415	2,354	1,493
Financing Receivable, Net	16,994	35,191	24,082
Commercial Loan | Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	2,758	7,611	0
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	2,758	7,611	0
Commercial Loan | Accruing TDRs | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	593
Financing Receivable, Recorded Investment, Past Due	0	14,056
Financing Receivable, Net	0	14,649
Commercial Loan | Accruing TDRs | Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			0
Financing Receivable, Recorded Investment, Past Due			24,241
Financing Receivable, Net			24,241
Commercial Loan | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	9,751	5,634	4,680
Financing Receivable, Recorded Investment, Past Due	30,113	7,851	2,692
Financing Receivable, Net	39,864	13,485	7,372
Commercial Loan | Nonaccruing TDRs | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	8,506	4,975	3,724
Financing Receivable, Recorded Investment, Past Due	16,835	7,592	1,193
Financing Receivable, Net	25,341	12,567	4,917
Commercial Loan | Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	665	659	956
Financing Receivable, Recorded Investment, Past Due	102	259	1,499
Financing Receivable, Net	767	918	2,455
Commercial Loan | Nonaccruing TDRs | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	580	0
Financing Receivable, Recorded Investment, Past Due	13,176	0
Financing Receivable, Net	13,756	0
Commercial Loan | Nonaccruing TDRs | Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			0
Financing Receivable, Recorded Investment, Past Due			0
Financing Receivable, Net			0
Commercial Loan | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	59,616
Impaired Financing Receivable, Related Allowance	8,587		2,651
Commercial Loan | Total Tdr Allowance | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	42,335	47,758
Impaired Financing Receivable, Related Allowance	6,214	6,072	195
Commercial Loan | Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	3,525	8,529
Impaired Financing Receivable, Related Allowance	29	201	137
Commercial Loan | Total Tdr Allowance | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	13,756
Impaired Financing Receivable, Related Allowance	2,344
Commercial Loan | Total Tdr Allowance | Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Impaired Financing Receivable, Related Allowance			2,319
Construction Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	580	593	346
Impaired Financing Receivable, Related Allowance		0
Construction Loans | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			0
Construction Loans | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	663,449	643,491
Financing Receivable, Recorded Investment, Past Due	7,376	1,846
Financing Receivable, Net	670,825	645,337	580,978
Recorded Investment	0	0	0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0	0
Construction Loans | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	4,749	5,380
Financing Receivable, Recorded Investment, Past Due	718	733
Financing Receivable, Net	5,467	6,113	6,288
Recorded Investment	0
Construction Loans | Covered Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	580	593	346
Construction Loans | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment		593	346
Impaired Financing Receivable, Related Allowance		0
Construction Loans | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	593	0
Financing Receivable, Recorded Investment, Past Due	0	0	346
Financing Receivable, Net	0	593	346
Construction Loans | Accruing TDRs | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0	0
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	0	0	0
Construction Loans | Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0
Financing Receivable, Recorded Investment, Past Due	0
Financing Receivable, Net	0
Construction Loans | Accruing TDRs | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	593	0
Financing Receivable, Recorded Investment, Past Due	0	0	346
Financing Receivable, Net	0	593	346
Construction Loans | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	580	0	0
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	580	0	0
Construction Loans | Nonaccruing TDRs | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0	0
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	0	0	0
Construction Loans | Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0
Financing Receivable, Recorded Investment, Past Due	0
Financing Receivable, Net	0
Construction Loans | Nonaccruing TDRs | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	580	0	0
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	580	0	0
Construction Loans | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	580
Impaired Financing Receivable, Related Allowance	42		293
Construction Loans | Total Tdr Allowance | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	0	0
Impaired Financing Receivable, Related Allowance	0	0	0
Construction Loans | Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	0
Impaired Financing Receivable, Related Allowance	0
Construction Loans | Total Tdr Allowance | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	580
Impaired Financing Receivable, Related Allowance	42		293
Consumer Home Equity Lines Financing Receivable
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			23,851
Consumer Home Equity Lines Financing Receivable | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			7,632
Consumer Home Equity Lines Financing Receivable | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			254
Consumer Home Equity Lines Financing Receivable | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			7,310
Consumer Home Equity Lines Financing Receivable | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			8,909
Consumer Home Equity Lines Financing Receivable | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			20,993
Financing Receivable, Recorded Investment, Past Due			1,616
Financing Receivable, Net			22,609
Consumer Home Equity Lines Financing Receivable | Accruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			6,680
Financing Receivable, Recorded Investment, Past Due			113
Financing Receivable, Net			6,793
Consumer Home Equity Lines Financing Receivable | Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			6,610
Financing Receivable, Recorded Investment, Past Due			564
Financing Receivable, Net			7,174
Consumer Home Equity Lines Financing Receivable | Accruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			7,703
Financing Receivable, Recorded Investment, Past Due			939
Financing Receivable, Net			8,642
Consumer Home Equity Lines Financing Receivable | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			1,214
Financing Receivable, Recorded Investment, Past Due			28
Financing Receivable, Net			1,242
Consumer Home Equity Lines Financing Receivable | Nonaccruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			811
Financing Receivable, Recorded Investment, Past Due			28
Financing Receivable, Net			839
Consumer Home Equity Lines Financing Receivable | Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			136
Financing Receivable, Recorded Investment, Past Due			0
Financing Receivable, Net			136
Consumer Home Equity Lines Financing Receivable | Nonaccruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			267
Financing Receivable, Recorded Investment, Past Due			0
Financing Receivable, Net			267
Consumer Home Equity Lines Financing Receivable | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Impaired Financing Receivable, Related Allowance			278
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			254
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
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			24
Consumer Residential Mortgages Financing Receivable
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			27,193
Consumer Residential Mortgages Financing Receivable | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			24,822
Consumer Residential Mortgages Financing Receivable | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			2,186
Consumer Residential Mortgages Financing Receivable | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			15,819
Financing Receivable, Recorded Investment, Past Due			2,286
Financing Receivable, Net			18,105
Consumer Residential Mortgages Financing Receivable | Accruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			14,299
Financing Receivable, Recorded Investment, Past Due			2,286
Financing Receivable, Net			16,585
Consumer Residential Mortgages Financing Receivable | Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			1,335
Financing Receivable, Recorded Investment, Past Due			0
Financing Receivable, Net			1,335
Consumer Residential Mortgages Financing Receivable | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			5,636
Financing Receivable, Recorded Investment, Past Due			3,452
Financing Receivable, Net			9,088
Consumer Residential Mortgages Financing Receivable | Nonaccruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			5,020
Financing Receivable, Recorded Investment, Past Due			3,217
Financing Receivable, Net			8,237
Consumer Residential Mortgages Financing Receivable | Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			616
Financing Receivable, Recorded Investment, Past Due			235
Financing Receivable, Net			851
Consumer Residential Mortgages Financing Receivable | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Impaired Financing Receivable, Related Allowance			1,416
Consumer Residential Mortgages Financing Receivable | Total Tdr Allowance | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Impaired Financing Receivable, Related Allowance			1,416
Consumer Residential Mortgages Financing Receivable | Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Impaired Financing Receivable, Related Allowance			0
Commercial Real Estate
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	30,876	29,645	38,424
Impaired Financing Receivable, Related Allowance		2,554
Commercial Real Estate | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			12,076
Commercial Real Estate | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Net	2,079,662	2,077,344	2,133,017
Recorded Investment	14,175	14,671	12,076
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	567	128	317
Commercial Real Estate | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	3,525	918	2,453
Commercial Real Estate | Covered Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	13,176	14,056	23,895
Commercial Real Estate | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment		14,056	23,895
Impaired Financing Receivable, Related Allowance		2,333
Commercial Real Estate | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	3,031	10,271	6,031
Financing Receivable, Recorded Investment, Past Due	2,247	16,303	25,388
Financing Receivable, Net	5,278	26,574	31,419
Commercial Real Estate | Accruing TDRs | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	273	10,271	6,031
Financing Receivable, Recorded Investment, Past Due	2,247	2,247	1,493
Financing Receivable, Net	2,520	12,518	7,524
Commercial Real Estate | Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	2,758	0	0
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	2,758	0	0
Commercial Real Estate | Accruing TDRs | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0	0
Financing Receivable, Recorded Investment, Past Due	0	14,056	23,895
Financing Receivable, Net	0	14,056	23,895
Commercial Real Estate | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,430	1,405	4,678
Financing Receivable, Recorded Investment, Past Due	24,168	1,666	2,327
Financing Receivable, Net	25,598	3,071	7,005
Commercial Real Estate | Nonaccruing TDRs | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	765	746	3,724
Financing Receivable, Recorded Investment, Past Due	10,890	1,407	828
Financing Receivable, Net	11,655	2,153	4,552
Commercial Real Estate | Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	665	659	954
Financing Receivable, Recorded Investment, Past Due	102	259	1,499
Financing Receivable, Net	767	918	2,453
Commercial Real Estate | Nonaccruing TDRs | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0	0
Financing Receivable, Recorded Investment, Past Due	13,176	0	0
Financing Receivable, Net	13,176	0	0
Commercial Real Estate | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	30,876
Impaired Financing Receivable, Related Allowance	2,351		2,232
Commercial Real Estate | Total Tdr Allowance | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	14,175	14,671
Impaired Financing Receivable, Related Allowance	20	20	71
Commercial Real Estate | Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	3,525	918
Impaired Financing Receivable, Related Allowance	29	201	135
Commercial Real Estate | Total Tdr Allowance | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	13,176
Impaired Financing Receivable, Related Allowance	2,302		2,026
Consumer Installment
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			28,077
Consumer Installment | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			26,882
Consumer Installment | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			1,195
Consumer Installment | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			25,840
Financing Receivable, Recorded Investment, Past Due			442
Financing Receivable, Net			26,282
Consumer Installment | Accruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			24,701
Financing Receivable, Recorded Investment, Past Due			409
Financing Receivable, Net			25,110
Consumer Installment | Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			1,139
Financing Receivable, Recorded Investment, Past Due			33
Financing Receivable, Net			1,172
Consumer Installment | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			1,551
Financing Receivable, Recorded Investment, Past Due			244
Financing Receivable, Net			1,795
Consumer Installment | Nonaccruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			1,528
Financing Receivable, Recorded Investment, Past Due			244
Financing Receivable, Net			1,772
Consumer Installment | Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current			23
Financing Receivable, Recorded Investment, Past Due			0
Financing Receivable, Net			23
Consumer Installment | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Impaired Financing Receivable, Related Allowance			1,053
Consumer Installment | Total Tdr Allowance | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Impaired Financing Receivable, Related Allowance			1,005
Consumer Installment | Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Impaired Financing Receivable, Related Allowance			48
Residential Mortgages
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	25,155	26,241	27,193
Impaired Financing Receivable, Related Allowance		944
Residential Mortgages | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	680,515	669,734	620,827
Financing Receivable, Recorded Investment, Past Due	19,623	19,311	19,153
Financing Receivable, Net	700,138	689,045	639,980
Recorded Investment	23,105	23,905	24,822
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,038	944	1,416
Residential Mortgages | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	294,810	307,889	362,458
Financing Receivable, Recorded Investment, Past Due	13,808	16,119	15,734
Financing Receivable, Net	308,618	324,008	378,192
Recorded Investment	2,050	2,154	2,186
Residential Mortgages | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	0	182	185
Impaired Financing Receivable, Related Allowance		0
Residential Mortgages | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	14,863	14,147
Financing Receivable, Recorded Investment, Past Due	1,764	3,152
Financing Receivable, Net	16,627	17,299
Residential Mortgages | Accruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	13,707	12,869
Financing Receivable, Recorded Investment, Past Due	1,517	2,896
Financing Receivable, Net	15,224	15,765
Residential Mortgages | Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,156	1,096
Financing Receivable, Recorded Investment, Past Due	247	256
Financing Receivable, Net	1,403	1,352
Residential Mortgages | Accruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	182	185
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	0	182	185
Residential Mortgages | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	6,018	5,413
Financing Receivable, Recorded Investment, Past Due	2,510	3,529
Financing Receivable, Net	8,528	8,942
Residential Mortgages | Nonaccruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	5,395	4,611
Financing Receivable, Recorded Investment, Past Due	2,486	3,529
Financing Receivable, Net	7,881	8,140
Residential Mortgages | Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	623	802
Financing Receivable, Recorded Investment, Past Due	24	0
Financing Receivable, Net	647	802
Residential Mortgages | Nonaccruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0	0
Financing Receivable, Recorded Investment, Past Due	0	0	0
Financing Receivable, Net	0	0	0
Residential Mortgages | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	25,155
Impaired Financing Receivable, Related Allowance	1,038
Residential Mortgages | Total Tdr Allowance | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	23,105	23,905
Impaired Financing Receivable, Related Allowance		944
Residential Mortgages | Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	2,050	2,154
Impaired Financing Receivable, Related Allowance	0	0
Residential Mortgages | Total Tdr Allowance | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	0	182
Impaired Financing Receivable, Related Allowance	0		0
Residential Portfolio Segment | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			1,416
Credit Card Receivable
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	687	717	815
Impaired Financing Receivable, Related Allowance		243
Credit Card Receivable | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			815
Credit Card Receivable | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	176,840	180,268	159,174
Financing Receivable, Recorded Investment, Past Due	2,183	2,575	1,592
Financing Receivable, Net	179,023	182,843	160,766
Recorded Investment	687	717	815
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	225	243	263
Credit Card Receivable | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	554	575	721
Financing Receivable, Recorded Investment, Past Due	111	140	77
Financing Receivable, Net	665	715	798
Credit Card Receivable | Accruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	554	575	721
Financing Receivable, Recorded Investment, Past Due	111	140	77
Financing Receivable, Net	665	715	798
Credit Card Receivable | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0	0
Financing Receivable, Recorded Investment, Past Due	22	2	17
Financing Receivable, Net	22	2	17
Credit Card Receivable | Nonaccruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0	0
Financing Receivable, Recorded Investment, Past Due	22	2	17
Financing Receivable, Net	22	2	17
Credit Card Receivable | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	687
Impaired Financing Receivable, Related Allowance	225		263
Credit Card Receivable | Total Tdr Allowance | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	687	717
Impaired Financing Receivable, Related Allowance		243	263
Total consumer
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	92,148	89,992	79,936
Impaired Financing Receivable, Related Allowance		2,522
Total consumer | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment			60,151
Total consumer | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	71,646	68,606	60,151
Total consumer | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	10,875	10,989	10,691
Total consumer | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	9,627	10,397	9,094
Total consumer | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	78,367	74,108	63,373
Financing Receivable, Recorded Investment, Past Due	2,865	5,051	4,421
Financing Receivable, Net	81,232	79,159	67,794
Total consumer | Accruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	59,305	54,857	46,401
Financing Receivable, Recorded Investment, Past Due	2,329	3,944	2,885
Financing Receivable, Net	61,634	58,801	49,286
Total consumer | Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	9,667	9,004	9,084
Financing Receivable, Recorded Investment, Past Due	355	1,037	597
Financing Receivable, Net	10,022	10,041	9,681
Total consumer | Accruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	9,395
Financing Receivable, Recorded Investment, Past Due	181
Financing Receivable, Net	9,576
Total consumer | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	8,330	7,079	8,401
Financing Receivable, Recorded Investment, Past Due	2,586	3,754	3,741
Financing Receivable, Net	10,916	10,833	12,142
Total consumer | Nonaccruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	7,450	6,135	7,359
Financing Receivable, Recorded Investment, Past Due	2,562	3,670	3,506
Financing Receivable, Net	10,012	9,805	10,865
Total consumer | Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	829	938	775
Financing Receivable, Recorded Investment, Past Due	24	10	235
Financing Receivable, Net	853	948	1,010
Total consumer | Nonaccruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	51
Financing Receivable, Recorded Investment, Past Due	0
Financing Receivable, Net	51
Total consumer | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	92,148
Impaired Financing Receivable, Related Allowance	2,656		3,010
Total consumer | Total Tdr Allowance | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	71,646	68,606
Impaired Financing Receivable, Related Allowance	2,529	2,384	2,938
Total consumer | Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	10,875	10,989
Impaired Financing Receivable, Related Allowance	101	115	48
Total consumer | Total Tdr Allowance | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	9,627	10,397
Impaired Financing Receivable, Related Allowance	26
Installment
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	41,451	38,021	28,077
Impaired Financing Receivable, Related Allowance		1,054
Installment | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	3,135,604	2,963,667	2,481,622
Financing Receivable, Recorded Investment, Past Due	19,308	26,682	18,666
Financing Receivable, Net	3,154,912	2,990,349	2,500,288
Recorded Investment	40,134	36,904	26,882
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,081	1,009	1,005
Installment | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	534,018	566,010	710,391
Financing Receivable, Recorded Investment, Past Due	5,295	7,362	7,302
Financing Receivable, Net	539,313	573,372	717,693
Recorded Investment	1,317	1,117	1,195
Installment | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	39,383	35,869
Financing Receivable, Recorded Investment, Past Due	600	920
Financing Receivable, Net	39,983	36,789
Installment | Accruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	38,153	34,902
Financing Receivable, Recorded Investment, Past Due	600	794
Financing Receivable, Net	38,753	35,696
Installment | Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,230	967
Financing Receivable, Recorded Investment, Past Due	0	126
Financing Receivable, Net	1,230	1,093
Installment | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,429	1,139
Financing Receivable, Recorded Investment, Past Due	39	93
Financing Receivable, Net	1,468	1,232
Installment | Nonaccruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,342	1,125
Financing Receivable, Recorded Investment, Past Due	39	83
Financing Receivable, Net	1,381	1,208
Installment | Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	87	14
Financing Receivable, Recorded Investment, Past Due	0	10
Financing Receivable, Net	87	24
Installment | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	41,451
Impaired Financing Receivable, Related Allowance	1,123
Installment | Total Tdr Allowance | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	40,134	36,904
Impaired Financing Receivable, Related Allowance		1,009
Installment | Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	1,317	1,117
Impaired Financing Receivable, Related Allowance	42	45
Home Equity Line of Credit
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	24,855	25,013	23,851
Impaired Financing Receivable, Related Allowance		281
Home Equity Line of Credit | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Net	1,254,709	1,248,438	1,134,238
Recorded Investment	7,720	7,080	7,632
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	185	188	254
Home Equity Line of Credit | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	7,508	7,718	7,310
Home Equity Line of Credit | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	9,627	10,215	$ 8,909
Impaired Financing Receivable, Related Allowance		23
Home Equity Line of Credit | Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	23,567	23,517
Financing Receivable, Recorded Investment, Past Due	390	839
Financing Receivable, Net	23,957	24,356
Home Equity Line of Credit | Accruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	6,891	6,511
Financing Receivable, Recorded Investment, Past Due	101	114
Financing Receivable, Net	6,992	6,625
Home Equity Line of Credit | Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	7,281	6,941
Financing Receivable, Recorded Investment, Past Due	108	655
Financing Receivable, Net	7,389	7,596
Home Equity Line of Credit | Accruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	9,395	10,065
Financing Receivable, Recorded Investment, Past Due	181	70
Financing Receivable, Net	9,576	10,135
Home Equity Line of Credit | Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	883	527
Financing Receivable, Recorded Investment, Past Due	15	130
Financing Receivable, Net	898	657
Home Equity Line of Credit | Nonaccruing TDRs | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	713	399
Financing Receivable, Recorded Investment, Past Due	15	56
Financing Receivable, Net	728	455
Home Equity Line of Credit | Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	119	122
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivable, Net	119	122
Home Equity Line of Credit | Nonaccruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	51	6
Financing Receivable, Recorded Investment, Past Due	0	74
Financing Receivable, Net	51	80
Home Equity Line of Credit | Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	24,855
Impaired Financing Receivable, Related Allowance	270
Home Equity Line of Credit | Total Tdr Allowance | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	7,720	7,080
Impaired Financing Receivable, Related Allowance		188
Home Equity Line of Credit | Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	7,508	7,718
Impaired Financing Receivable, Related Allowance	59	70
Home Equity Line of Credit | Total Tdr Allowance | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Recorded Investment	9,627	$ 10,215
Impaired Financing Receivable, Related Allowance	$ 26

Allowance for Loan Losses (Sc56

Allowance for Loan Losses (Schedule of Defaulted Troubled Debt Restructuring) (Details) $ in Thousands	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	16	6
Financing receivable, modifications, subsequent default, recorded investment	$ 461	$ 499
Credit Card Receivable
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	3	2
Financing receivable, modifications, subsequent default, recorded investment	$ 2	$ 17
Credit Card Receivable | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	3	2
Financing receivable, modifications, subsequent default, recorded investment	$ 2	$ 17
Commercial and Industrial
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	2
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 482
Commercial and Industrial | Originated 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
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	1
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 427
Commercial and Industrial | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	1
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 55
Commercial Real Estate
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	$ 255	$ 0
Commercial Real Estate | Originated 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
Commercial Real Estate | Covered 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
Commercial Real Estate | 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	$ 255	$ 0
Construction 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
Construction Loans | Originated 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
Construction Loans | Covered 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
Construction Loans | 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
Commercial Loan
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	1	2
Financing receivable, modifications, subsequent default, recorded investment	$ 255	$ 482
Commercial Loan | Originated 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
Commercial Loan | Covered Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	1
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 427
Commercial Loan | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	1	1
Financing receivable, modifications, subsequent default, recorded investment	$ 255	$ 55
Installment
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	10
Financing receivable, modifications, subsequent default, recorded investment	$ 114
Installment | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	8
Financing receivable, modifications, subsequent default, recorded investment	$ 83
Installment | Acquired 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	$ 31
Consumer Installment
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		$ 0
Consumer Installment | Originated Consumer 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		$ 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
Financing receivable, modifications, subsequent default, recorded investment	$ 14	$ 0
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
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 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
Financing receivable, modifications, subsequent default, recorded investment	$ 14
Residential Mortgages
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	$ 76	$ 0
Residential Mortgages | Originated Consumer 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	$ 76	$ 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
Financing receivable, modifications, subsequent default, recorded investment	$ 0
Total consumer
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	15	4
Financing receivable, modifications, subsequent default, recorded investment	$ 206	$ 17
Total consumer | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	12	4
Financing receivable, modifications, subsequent default, recorded investment	$ 161	$ 17
Total consumer | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	3
Financing receivable, modifications, subsequent default, recorded investment	$ 45

Allowance for Loan Losses (Deta

Allowance for Loan Losses (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Allowance For Loan And Lease Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	$ 600,000	$ 2,200,000
Loan Commitments	6,068,239,000	6,034,870,000	$ 6,385,147,000
Minimum Non Performing Substandard Loans Outstanding for Allowance for Credit Losses	300,000
Minimum Non Performing Substandard Doubtful Loans Outstanding for Allowance for Credit Losses	100,000
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	234,000	118,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	1,200,000	900,000
Total impaired loans with no related allowance
Allowance For Loan And Lease Losses [Line Items]
Loan Commitments	$ 8,300,000	$ 6,100,000	$ 7,000,000

(Accumulated Amortization of In

(Accumulated Amortization of Intangible Assets Schedule) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 96,561	$ 96,561	$ 96,561
Finite-Lived Intangible Assets, Accumulated Amortization	(38,237)	(35,933)	(28,139)
Finite-Lived Intangible Assets, Net	58,324	60,628	68,422
Core Deposits
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	82,323	82,323	82,323
Finite-Lived Intangible Assets, Accumulated Amortization	(30,194)	(28,304)	(22,073)
Finite-Lived Intangible Assets, Net	52,129	54,019	60,250
Lease Agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	238	238	238
Finite-Lived Intangible Assets, Accumulated Amortization	(220)	(212)	(185)
Finite-Lived Intangible Assets, Net	18	26	53
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	(7,823)	(7,417)	(5,881)
Finite-Lived Intangible Assets, Net	$ 6,177	$ 6,583	$ 8,119

Goodwill and Other Intangible59

Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 741,740	$ 741,740	$ 741,740
Amortization of intangible assets	2,304	$ 2,598
Remainder of 2016	6,900
2,017	8,200
2,018	7,300
2,019	6,500
2,020	$ 5,200
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	12 years
Minimum | Core Deposits
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	10 years
Maximum | Core Deposits
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	15 years

Shareholders' Equity (Reconcili

Shareholders' Equity (Reconciliation of Basic and Diluted EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Schedule of Earnings Per Share, Basic and Diluted [Line Items]
Net income	$ 54,136	$ 57,139
Preferred Stock dividends	1,469	1,469
Less: Net income allocated to participating shareholders	387	407
Net income attributable to common shareholders	$ 52,280	$ 55,263
Weighted average number of common shares outstanding - basic	165,745	165,411
Basic earnings per common share (in dollars per share)	$ 0.32	$ 0.33
Net Income (Loss) Available to Common Stockholders, Diluted	$ 52,280	$ 55,263
Weighted average number of common shares outstanding - diluted	166,239	166,003
Diluted earnings per common share (in dollars per share)	$ 0.31	$ 0.33
Employee Stock Option
Schedule of Earnings Per Share, Basic and Diluted [Line Items]
Weighted average number of common shares outstanding - diluted	494	592

Shareholders' Equity (Narrative

Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	May. 13, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Shareholders Equity Narrative [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		500,000	800,000
Payments for Repurchase of Warrants	$ 12.2
Adjustments to Additional Paid in Capital, Other		$ (9.2)
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
Non-Cumulative Perpetual Preferred stock, Series A, Shares Outstanding		100,000	100,000	100,000
Citizens Republic Bancorp
Shareholders Equity Narrative [Line Items]
Interest rate of Non-Cumulative Perpetual Preferred Stock, Series A		5.875%
Citizens Republic Bancorp | Citizens Republic Bancorp
Shareholders Equity Narrative [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 17.50
FirstMerit | Citizens Republic Bancorp
Shareholders Equity Narrative [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	2,571,998.380

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
OPERATIONS:
Net interest income	$ 185,156	$ 185,623
Provision/ (recapture) for loan losses	7,809	8,248
Noninterest Income	67,394	65,847
Other expenses	166,963	160,652
Net income	54,136	57,139
AVERAGES :
Assets	25,770,857	24,905,094
Loans	16,079,447	15,427,181
Earning assets	22,890,082	22,100,417
Deposits	20,635,665	19,788,925
Economic capital	2,970,167	2,866,362
Operating Segments | Commercial Loan
OPERATIONS:
Net interest income	102,619	99,844
Provision/ (recapture) for loan losses	5,772	(526)
Noninterest Income	21,179	22,490
Other expenses	61,020	61,653
Net income	37,054	39,785
AVERAGES :
Assets	9,592,202	9,454,218
Loans	9,709,788	9,506,529
Earning assets	10,074,234	9,794,483
Deposits	7,478,489	6,886,945
Economic capital	1,252,294	848,890
Operating Segments | Retail
OPERATIONS:
Net interest income	94,728	91,095
Provision/ (recapture) for loan losses	4,047	7,533
Noninterest Income	23,594	21,737
Other expenses	88,694	88,271
Net income	16,628	11,068
AVERAGES :
Assets	6,232,255	5,845,417
Loans	6,020,757	5,570,590
Earning assets	6,027,689	5,582,849
Deposits	11,025,256	11,124,158
Economic capital	872,762	479,188
Operating Segments | Wealth
OPERATIONS:
Net interest income	6,552	5,353
Provision/ (recapture) for loan losses	(155)	(170)
Noninterest Income	14,309	13,976
Other expenses	13,353	13,719
Net income	4,981	3,756
AVERAGES :
Assets	305,566	302,186
Loans	297,143	292,016
Earning assets	297,143	292,016
Deposits	1,319,711	1,240,960
Economic capital	131,588	55,187
Other
OPERATIONS:
Net interest income	(18,743)	(10,669)
Provision/ (recapture) for loan losses	(1,855)	1,411
Noninterest Income	8,312	7,644
Other expenses	3,896	(2,991)
Net income	(4,527)	2,530
AVERAGES :
Assets	9,640,834	9,303,273
Loans	51,759	58,046
Earning assets	6,491,016	6,431,069
Deposits	812,209	536,862
Economic capital	$ 713,523	$ 1,483,097

Derivatives and Hedging Activ63

Derivatives and Hedging Activities (Designated as Hedging Instruments, Notional Values, Contractual Amounts and Fair Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Derivatives designated in hedge relationships
Derivative Asset, Fair Value	$ 98,549	$ 58,107	$ 72,573
Derivative Liability, Fair Value	78,621	52,745	65,447
Commercial Loan Swaps (FRAPS) | Designated as Hedging Instrument
Derivatives designated in hedge relationships
Derivative Asset, Notional/Contract Amount	0	0	0
Derivative Asset, Fair Value	0	0	0
Derivative Liability, Notional/Contract Amount	52,821	55,689	89,591
Derivative Liability, Fair Value	3,238	3,536	6,063
Sub Debt Swap | Designated as Hedging Instrument
Derivatives designated in hedge relationships
Derivative Asset, Notional/Contract Amount	250,000	250,000	250,000
Derivative Asset, Fair Value	22,718	8,739	12,688
Derivative Liability, Notional/Contract Amount	0	0	0
Derivative Liability, Fair Value	0	0	0
Interest rate swaps | Designated as Hedging Instrument
Derivatives designated in hedge relationships
Derivative Asset, Notional/Contract Amount	250,000	250,000	250,000	$ 250,000
Derivative Asset, Fair Value	22,718	8,739	12,688
Derivative Liability, Notional/Contract Amount	52,821	55,689	89,591
Derivative Liability, Fair Value	3,238	3,536	6,063
Level 2
Derivatives designated in hedge relationships
Derivative Asset, Fair Value	98,549	58,107	72,573
Derivative Liability, Fair Value	78,621	52,745	65,447
Level 2 | Interest rate swaps | Designated as Hedging Instrument
Derivatives designated in hedge relationships
Derivative Asset, Fair Value	22,718	8,739	12,688
Derivative Liability, Fair Value	$ 3,238	$ 3,536	$ 6,063

Derivatives and Hedging Activ64

Derivatives and Hedging Activities (Not Designated as Hedging Instruments, Notional Values, Contractual Amounts and Fair Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Derivatives not designated in hedge relationships
Derivative Asset, Fair Value	$ 98,549	$ 58,107	$ 72,573
Derivative Liability, Fair Value	78,621	52,745	65,447
Not Designated as Hedging Instrument
Derivatives not designated in hedge relationships
Derivative Asset, Notional/Contract Amount	1,906,785	1,858,882	1,811,324
Derivative Asset, Fair Value	75,831	49,368	59,885
Derivative Liability, Notional/Contract Amount	1,977,022	1,956,287	1,851,603
Derivative Liability, Fair Value	75,383	49,209	59,384
Not Designated as Hedging Instrument | Interest rate swaps
Derivatives not designated in hedge relationships
Derivative Asset, Notional/Contract Amount	1,850,414	1,824,576	1,718,850
Derivative Asset, Fair Value	75,139	48,920	59,147
Derivative Liability, Notional/Contract Amount	1,850,414	1,824,576	1,718,850
Derivative Liability, Fair Value	75,139	48,920	59,147
Not Designated as Hedging Instrument | Mortgage loan commitments
Derivatives not designated in hedge relationships
Derivative Asset, Notional/Contract Amount	40,904	20,635	51,937
Derivative Asset, Fair Value	240	149	388
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	0
Derivative Asset, Fair Value		0	0
Derivative Liability, Notional/Contract Amount	$ 7,527	9,659	11,758
Derivative Liability, Fair Value	82	5	68
Not Designated as Hedging Instrument | Credit Risk Contract
Derivatives not designated in hedge relationships
Derivative Asset, Notional/Contract Amount	0	0	0
Derivative Asset, Fair Value	0	0	0
Derivative Liability, Notional/Contract Amount	74,315	73,715	80,047
Derivative Liability, Fair Value	8	0	0
Not Designated as Hedging Instrument | Equity Swap
Derivatives not designated in hedge relationships
Derivative Asset, Notional/Contract Amount	0	0	0
Derivative Asset, Fair Value	0	0	0
Derivative Liability, Notional/Contract Amount	36,125	36,631	30,896
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	15,467	13,671	40,537
Derivative Asset, Fair Value	452	299	350
Derivative Liability, Notional/Contract Amount	8,641	11,706	10,052
Derivative Liability, Fair Value	154	284	169
Level 2
Derivatives not designated in hedge relationships
Derivative Asset, Fair Value	98,549	58,107	72,573
Derivative Liability, Fair Value	$ 78,621	52,745	65,447
Level 2 | Not Designated as Hedging Instrument
Derivatives not designated in hedge relationships
Derivative Asset, Fair Value
Level 2 | Not Designated as Hedging Instrument | Interest rate swaps
Derivatives not designated in hedge relationships
Derivative Asset, Fair Value	$ 75,139	48,920	59,147
Derivative Liability, Fair Value	75,139	48,920	59,147
Level 2 | Not Designated as Hedging Instrument | Mortgage loan commitments
Derivatives not designated in hedge relationships
Derivative Asset, Fair Value	240	149	388
Level 2 | Not Designated as Hedging Instrument | Forward sales contracts
Derivatives not designated in hedge relationships
Derivative Liability, Fair Value	82	5	68
Level 2 | Not Designated as Hedging Instrument | Foreign Exchange
Derivatives not designated in hedge relationships
Derivative Asset, Fair Value	452	299	350
Derivative Liability, Fair Value	$ 154	$ 284	$ 169

Derivatives and Hedging Activ65

Derivatives and Hedging Activities (Gains and Losses Recognized) (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	$ 834	$ (1,693)
Mortgage loan commitments | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	92	(1,020)
Forward sales contracts | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	(77)	204
Credit Risk Contract | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	819	(877)
Other Credit Derivatives | Other Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	$ 0	$ 0

Derivatives and Hedging Activ66

Derivatives and Hedging Activities (Offsetting Disclosure for Derivative Contracts) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Offsetting Disclosure for Derivative Contracts [Line Items]
offsetting disclosure, derivative asset, fair value, gross	$ 22,765	$ 9,164	$ 12,974
offsetting disclosure, offset amount, derivative asset, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative asset, falir value	22,765	9,164	12,974
offseting disclosure, netting adjustment, derivative asset, fair value	(47)	(187)	(114)
offsetting disclosure, collateral value, derivative asset	0	(238)	(172)
offsetting disclosure, net amount total, derivative asset, fair value	22,718	8,739	12,688
offsetting disclosure, derivative liability, fair value, gross	78,478	52,333	65,190
offsetting disclosure, offset amount, derivative liability, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative liability, falir value	78,478	52,333	65,190
offseting disclosure, netting adjustment, derivative liability, fair value	(47)	(187)	(114)
offsetting disclosure, collateral value, derivative liability	(78,431)	(52,146)	(65,076)
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 asset, fair value, gross	22,718	8,739	12,688
offsetting disclosure, offset amount, derivative asset, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative asset, falir value	22,718	8,739	12,688
offseting disclosure, netting adjustment, derivative asset, fair value	0	0	0
offsetting disclosure, collateral value, derivative asset	0	0	0
offsetting disclosure, net amount total, derivative asset, fair value	22,718	8,739	12,688
offsetting disclosure, derivative liability, fair value, gross	3,238	3,536	6,063
offsetting disclosure, offset amount, derivative liability, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative liability, falir value	3,238	3,536	6,063
offseting disclosure, netting adjustment, derivative liability, fair value	0	0	0
offsetting disclosure, collateral value, derivative liability	(3,238)	(3,536)	(6,063)
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	20	155	67
offsetting disclosure, offset amount, derivative asset, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative asset, falir value	20	155	67
offseting disclosure, netting adjustment, derivative asset, fair value	(20)	(155)	(67)
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	75,119	48,765	59,080
offsetting disclosure, offset amount, derivative liability, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative liability, falir value	75,119	48,765	59,080
offseting disclosure, netting adjustment, derivative liability, fair value	(20)	(155)	(67)
offsetting disclosure, collateral value, derivative liability	(75,099)	(48,610)	(59,013)
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	27	270	219
offsetting disclosure, offset amount, derivative asset, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative asset, falir value	27	270	219
offseting disclosure, netting adjustment, derivative asset, fair value	(27)	(32)	(47)
offsetting disclosure, collateral value, derivative asset	0	(238)	(172)
offsetting disclosure, net amount total, derivative asset, fair value	0	0	0
offsetting disclosure, derivative liability, fair value, gross	121	32	47
offsetting disclosure, offset amount, derivative liability, fair value, gross	0	0	0
offsetting disclosure, net amount, derivative liability, falir value	121	32	47
offseting disclosure, netting adjustment, derivative liability, fair value	(27)	(32)	(47)
offsetting disclosure, collateral value, derivative liability	(94)	0	0
offsetting disclosure, net amount total, derivative liability, fair value	$ 0	$ 0	$ 0

Derivatives and Hedging Activ67

Derivatives and Hedging Activities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Term of written loan commitments, days	60
Default Assumptions Percentage	100.00%
Credit Derivative, Maximum Exposure, Undiscounted	$ 6,400
Government Agency Issued Bonds or MBS
Derivative [Line Items]
Collateral posted against derivative liabilities	45,100	$ 47,200	$ 53,600
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 250,000	$ 250,000	$ 250,000	$ 250,000
Minimum | Equity Swap
Derivative [Line Items]
Maturity of Credit Risk Derivatives	2 years
Minimum | Credit Risk Contract
Derivative [Line Items]
Maturity of Credit Risk Derivatives	1 year
Maximum | Equity Swap
Derivative [Line Items]
Maturity of Credit Risk Derivatives	7 years
Maximum | Credit Risk Contract
Derivative [Line Items]
Maturity of Credit Risk Derivatives	9 years

Benefit Plans (Schedule of Net

Benefit Plans (Schedule of Net Benefit Costs Details) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Pension Plan, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 198	$ 207
Defined Benefit Plan, Interest Cost	3,649	3,517
Defined Benefit Plan, Expected Return on Plan Assets	(3,788)	(3,902)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	75	570
Defined Benefit Plan, Amortization of Gains (Losses)	830	1,057
Defined Benefit Plan, Net Periodic Benefit Cost	964	1,449
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	26	41
Defined Benefit Plan, Interest Cost	64	144
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(636)	(160)
Defined Benefit Plan, Amortization of Gains (Losses)	245	81
Defined Benefit Plan, Net Periodic Benefit Cost	$ (301)	$ 106

Fair Value Measurement (Recurri

Fair Value Measurement (Recurring and Nonrecurring Table) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Recurring Fair Value Measurements
Available-for-sale	$ 4,104,214	$ 3,791,059	$ 3,967,735
Residential loans held for sale	5,249	3,568	5,472
Derivative Asset, Fair Value, Gross Asset	98,549	72,573	58,107
Total Assets, Fair Value Disclosure, Recurring	4,208,012	3,867,200	4,031,314
Derivative Liability, Fair Value, Gross Liability	78,621	65,447	52,745
True Up Liability	15,115	13,707	14,750
Total liabilities at fair value on a recurring basis	93,736	79,154	67,495
Nonrecurring Fair Value Measurements [Abstract]
Fair Value of Mortgage Servicing Rights	17,460	20,526	19,149
Impaired and Non Accrual Loans Fair Value Disclosure	86,315	63,839	71,428
Other Real Estate, Non Covered	13,629	16,956	18,576
Other Real Estate Covered by Loss Share		7,293	365
Nonrecurring Fair Value	117,404	108,614	109,518
Mortgage Servicing Rights	18,127	21,490	18,938	$ 22,011
Mortgage Servicing rights Valuation Allowance	(868)	(1,131)	(399)	$ (955)
Mortgage Servicing Rights Net Carrying balance	17,259	20,359	18,500
Mortgage Servicing Rights (MSR) Impairment (Recovery)	(469)	(176)	(600)
Impairment of Noncovered Other Real Estate Owned		900	4,500
Impairment of Covered Other Real Esate Owned		300	600
Impaired Collateral Dependant Loans, Recorded Investment	94,100	75,600	84,300
Determination Of Specific Allowance For Loan Losses	(7,800)	(11,800)	(12,900)
Collateral Dependant Impaired and Non Accrual Loans Carrying Amount	86,300	63,800	71,400
Foreclosed Real Estate Expense	2,000
Level 1
Recurring Fair Value Measurements
Available-for-sale	2,873	2,869	2,821
Residential loans held for sale	0	0	0
Derivative Asset, Fair Value, Gross Asset	0	0	0
Total Assets, Fair Value Disclosure, Recurring	2,873	2,869	2,821
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	0	0
Nonrecurring Fair Value Measurements [Abstract]
Fair Value of Mortgage Servicing Rights	0	0	0
Impaired and Non Accrual Loans Fair Value Disclosure	0	0	0
Other Real Estate, Non Covered	0	0	0
Other Real Estate Covered by Loss Share		0	0
Nonrecurring Fair Value	0	0	0
Level 2
Recurring Fair Value Measurements
Available-for-sale	3,767,184	3,441,959	3,623,270
Residential loans held for sale	5,249	3,568	5,472
Derivative Asset, Fair Value, Gross Asset	98,549	72,573	58,107
Total Assets, Fair Value Disclosure, Recurring	3,870,982	3,518,100	3,686,849
Derivative Liability, Fair Value, Gross Liability	78,621	65,447	52,745
True Up Liability	0	0	0
Total liabilities at fair value on a recurring basis	78,621	65,447	52,745
Nonrecurring Fair Value Measurements [Abstract]
Fair Value of Mortgage Servicing Rights	0	0	0
Impaired and Non Accrual Loans Fair Value Disclosure	0	0	0
Other Real Estate, Non Covered	0	0	0
Other Real Estate Covered by Loss Share		0	0
Nonrecurring Fair Value	0	0	0
Level 3
Recurring Fair Value Measurements
Available-for-sale	334,157	346,231	341,644
Residential loans held for sale	0	0	0
Derivative Asset, Fair Value, Gross Asset	0	0	0
Total Assets, Fair Value Disclosure, Recurring	334,157	346,231	341,644
Derivative Liability, Fair Value, Gross Liability	0	0	0
True Up Liability	15,115	13,707	14,750
Total liabilities at fair value on a recurring basis	15,115	13,707	14,750
Nonrecurring Fair Value Measurements [Abstract]
Fair Value of Mortgage Servicing Rights	17,460	20,526	19,149
Impaired and Non Accrual Loans Fair Value Disclosure	86,315	63,839	71,428
Other Real Estate, Non Covered	13,629	16,956	18,576
Other Real Estate Covered by Loss Share		7,293	365
Nonrecurring Fair Value	117,404	108,614	109,518
US Treasury Securities
Recurring Fair Value Measurements
Available-for-sale			5,000
Equity Securities
Recurring Fair Value Measurements
Available-for-sale	2,873	2,869	2,821
Equity Securities | Level 1
Recurring Fair Value Measurements
Available-for-sale		2,869	2,821
Equity Securities | Level 2
Recurring Fair Value Measurements
Available-for-sale		0	0
Equity Securities | Level 3
Recurring Fair Value Measurements
Available-for-sale		0	0
US Government Agency Debentures
Recurring Fair Value Measurements
Available-for-sale		2,513
US Government Agency Debentures | Level 1
Recurring Fair Value Measurements
Available-for-sale		0
US Government Agency Debentures | Level 2
Recurring Fair Value Measurements
Available-for-sale		2,513
US Government Agency Debentures | Level 3
Recurring Fair Value Measurements
Available-for-sale		0
Non-marketable Equity Securities
Recurring Fair Value Measurements
Available-for-sale			5,000
Non-marketable Equity Securities | Level 1
Recurring Fair Value Measurements
Available-for-sale			0
Non-marketable Equity Securities | Level 2
Recurring Fair Value Measurements
Available-for-sale			5,000
Non-marketable Equity Securities | Level 3
Recurring Fair Value Measurements
Available-for-sale			0
Marketable Equity Securities
Recurring Fair Value Measurements
Available-for-sale	2,873	2,869	2,821
Marketable Equity Securities | Level 1
Recurring Fair Value Measurements
Available-for-sale	2,873
Marketable Equity Securities | Level 2
Recurring Fair Value Measurements
Available-for-sale	0
Marketable Equity Securities | Level 3
Recurring Fair Value Measurements
Available-for-sale	0
US Government Agencies Debt Securities
Recurring Fair Value Measurements
Available-for-sale	2,520	2,513	2,498
US Government Agencies Debt Securities | Level 1
Recurring Fair Value Measurements
Available-for-sale	0
US Government Agencies Debt Securities | Level 2
Recurring Fair Value Measurements
Available-for-sale	2,520		2,498
US Government Agencies Debt Securities | Level 3
Recurring Fair Value Measurements
Available-for-sale	0
U.S. States and political subdivisions debt securities
Recurring Fair Value Measurements
Available-for-sale	173,141	215,164	192,795
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	173,141	215,164	192,795
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	907,656	947,303	906,229
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		947,303	906,229
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	184,248	140,359	172,109
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		140,359	172,109
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	2,226,737	1,892,560	2,128,320
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		1,892,560	2,128,320
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	4	6	4
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	0	1	0
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency | Level 3
Recurring Fair Value Measurements
Available-for-sale	4	5	4
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	272,882	244,059	216,319
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		244,059	216,319
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	48,756	52,264	52,229
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		52,264	52,229
Collateralized Loan Obligations
Recurring Fair Value Measurements
Available-for-sale	285,397	293,962	289,411
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	285,397	293,962	289,411
Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	75,831	59,885	49,368
Derivative Liability, Fair Value, Gross Liability	$ 75,383	59,384	49,209
Not Designated as Hedging Instrument | Level 2
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset
Interest Rate Swap | Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	$ 22,718	12,688	8,739
Derivative Liability, Fair Value, Gross Liability	3,238	6,063	3,536
Interest Rate Swap | 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 | Designated as Hedging Instrument | Level 2
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	22,718	12,688	8,739
Derivative Liability, Fair Value, Gross Liability	3,238	6,063	3,536
Interest Rate Swap | 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
Interest Rate Swap | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	75,139	59,147	48,920
Derivative Liability, Fair Value, Gross Liability	75,139	59,147	48,920
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	75,139	59,147	48,920
Derivative Liability, Fair Value, Gross Liability	75,139	59,147	48,920
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	240	388	149
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	240	388	149
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
Derivative Liability, Fair Value, Gross Liability	82	68	5
Forward sales contracts | Not Designated as Hedging Instrument | Level 1
Recurring Fair Value Measurements
Derivative Liability, Fair Value, Gross Liability	0	0	0
Forward sales contracts | Not Designated as Hedging Instrument | Level 2
Recurring Fair Value Measurements
Derivative Liability, Fair Value, Gross Liability	82	68	5
Forward sales contracts | Not Designated as Hedging Instrument | Level 3
Recurring Fair Value Measurements
Derivative Liability, Fair Value, Gross Liability	0	0	0
Foreign Exchange | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	452	350	299
Derivative Liability, Fair Value, Gross Liability	154	169	284
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	452	350	299
Derivative Liability, Fair Value, Gross Liability	154	169	284
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

Fair Value Measurement (Changes

Fair Value Measurement (Changes in Level 3 Table) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Available-for-sale securities, Beginning balance		$ 341,644	$ 339,187
Available-for-sale securities, (Gains) losses included in earnings	[1]	0	0
Available-for-sale securities, Unrealized gains (losses)	[2]	(7,556)	6,682
Available-for-sale securities, Purchases		0	$ 0
Available-for-sale securities, Sales		0
Available-for-sale securities, Settlements		69	$ 362
Available-for-sale securities, Ending balance		334,157	346,231
True-up liability, Beginning balance		14,750	13,294
True-up liability, (Gains) losses included in earnings		365	413	[1]
True-up liability, Unrealized gains (losses)	[2]	0	0
True-up liability, Purchases		0	$ 0
True-up liability, Sales		0
True-up liability, Settlements		0	$ 0
True-up liability, Ending balance		$ 15,115	$ 13,707
[1]	Reported in "Other expense
[2]	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 ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015		Mar. 31, 2015
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]
Loans held for sale	$ 5,249	$ 5,472		$ 3,568
Aggregate Fair Value
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]
Loans held for sale		5,472		3,568
Contractual Balance
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]
Loans held for sale	5,084	5,320		3,400
Fair Value, Option, Loans Held as Assets, Aggregate Difference	$ 165	$ 152	[1]	$ 168
[1]	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 ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Financial assets:
Cash and Cash Equivalents, at Carrying Value	$ 759,897	$ 532,425	$ 463,817	$ 697,424
Cash and due from banks, Fair Value	759,897	532,425	463,817
Available-for-sale Securities, Carrying Amount	4,104,214	3,791,059	3,967,735
Held-to-maturity Securities, Carrying Amount	2,613,700	2,855,174	2,674,093
Held-to-maturity Securities, Fair Value	2,632,274	2,848,912	2,659,119
Other Investments, Carrying Amount	148,159	148,475	148,172
Other Investments, Fair Value	148,159	148,475	148,172
Loans held for sale	5,249	3,568	5,472
Loans and Leases Receivable, Net Amount	16,073,513	15,344,337	15,923,254
Net covered loans and loss share receivable, Fair Value	157,632	268,459	170,690
Accrued interest receivable, Carrying Amount	70,280	69,086	67,887
Accrued interest receivable, Fair Value	70,280	69,086	67,887
Derivative Assets, Carrying Amount	98,549	72,573	58,107
Derivative Asset, Fair Value, Gross Asset	98,549	72,573	58,107
Financial liabilities:
Deposits, Carrying Amount	21,101,366	19,925,595	20,108,003
Deposits, Fair Value	21,109,594	19,932,571	20,116,298
Total Federal funds purchased and securities sold under agreements to repurchase, Carrying Amount	719,850	1,113,371	1,037,075
Federal funds purchased and securities sold under agreements to repurchase, Fair Value	719,850	1,113,371	1,037,075
Wholesale Borrowings, Carrying Amount	378,996	316,628	580,648
Other Borrowings, Fair Value	383,432	320,180	582,120
Long-term Debt	519,249	512,625	505,173
Long-term Debt, Fair Value	504,468	527,018	503,675
Accrued interest payable, Carrying Amount	10,093	9,620	10,758
Accrued interest payable, Fair Value	10,093	9,620	10,758
Derivative liabilities, Carrying Amount	78,621	65,447	52,745
Derivative Liability, Fair Value, Gross Liability	78,621	65,447	52,745
Mortgage Servicing rights Valuation Allowance	(868)	(1,131)	(399)	$ (955)
Mortgage Servicing Rights Net Carrying balance	17,259	20,359	18,500
Mortgage Servicing Rights (MSR) Impairment (Recovery)	469	176	600
Impaired Collateral Dependant Loans, Recorded Investment	94,100	75,600	84,300
Determination Of Specific Allowance For Loan Losses	7,800	11,800	12,900
Fair Value, Inputs, Level 1
Financial assets:
Cash and due from banks, Fair Value		532,425	463,817
Available-for-sale Securities, Carrying Amount	2,873	2,869	2,821
Held-to-maturity Securities, Fair Value	0	0	0
Other Investments, Fair Value	0	0	0
Loans held for sale	0	0	0
Net covered loans and loss share receivable, Fair Value	0	0	0
Accrued interest receivable, Fair Value	0	0	0
Derivative Asset, Fair Value, Gross Asset	0	0	0
Financial liabilities:
Deposits, Fair Value	0	0	0
Federal funds purchased and securities sold under agreements to repurchase, Fair Value	0	0	0
Other Borrowings, Fair Value	0	0	0
Long-term Debt, Fair Value	0	0	0
Accrued interest payable, Fair Value	0	0	0
Derivative Liability, Fair Value, Gross Liability	0	0	0
Fair Value, Inputs, Level 2
Financial assets:
Cash and due from banks, Fair Value	0	0	0
Available-for-sale Securities, Carrying Amount	3,767,184	3,441,959	3,623,270
Held-to-maturity Securities, Fair Value		2,848,912	2,659,119
Other Investments, Fair Value		148,475	148,172
Loans held for sale	5,249	3,568	5,472
Net covered loans and loss share receivable, Fair Value	0	0	0
Accrued interest receivable, Fair Value	70,280	69,086	67,887
Derivative Asset, Fair Value, Gross Asset	98,549	72,573	58,107
Financial liabilities:
Deposits, Fair Value	21,109,594	19,932,571	20,116,298
Federal funds purchased and securities sold under agreements to repurchase, Fair Value		1,113,371	1,037,075
Other Borrowings, Fair Value	383,432	320,180	582,120
Long-term Debt, Fair Value	504,468	527,018	503,675
Accrued interest payable, Fair Value	10,093	9,620	10,758
Derivative Liability, Fair Value, Gross Liability	78,621	65,447	52,745
Level 3
Financial assets:
Cash and due from banks, Fair Value	0	0	0
Available-for-sale Securities, Carrying Amount	334,157	346,231	341,644
Held-to-maturity Securities, Fair Value	0	0	0
Other Investments, Fair Value	0	0	0
Loans held for sale	0	0	0
Net covered loans and loss share receivable, Fair Value		268,459
Accrued interest receivable, Fair Value	0	0	0
Derivative Asset, Fair Value, Gross Asset	0	0	0
Financial liabilities:
Deposits, Fair Value	0	0	0
Federal funds purchased and securities sold under agreements to repurchase, Fair Value	0	0	0
Other Borrowings, Fair Value	0	0	0
Long-term Debt, Fair Value	0	0	0
Accrued interest payable, Fair Value	0	0	0
Derivative Liability, Fair Value, Gross Liability	0	0	0
Originated Loans
Financial assets:
Loans and Leases Receivable, Net Amount	14,286,598	12,758,492	14,013,370
Originated Loans and Leases Receivable Fair Value	14,069,307	12,588,147	13,795,058
Originated Loans | Fair Value, Inputs, Level 1
Financial assets:
Loans and Leases Receivable, Net Amount	0	0	0
Originated Loans | Fair Value, Inputs, Level 2
Financial assets:
Loans and Leases Receivable, Net Amount	0	0	0
Originated Loans | Level 3
Financial assets:
Loans and Leases Receivable, Net Amount	14,069,307	12,588,147	13,795,058
Acquired Loans
Financial assets:
Loans and Leases Receivable, Net Amount	1,629,283	2,317,386	1,739,194
Originated Loans and Leases Receivable Fair Value	1,681,087	2,393,942	1,796,314
Acquired Loans | Fair Value, Inputs, Level 1
Financial assets:
Loans and Leases Receivable, Net Amount	0	0	0
Acquired Loans | Fair Value, Inputs, Level 2
Financial assets:
Loans and Leases Receivable, Net Amount	0	0	0
Acquired Loans | Level 3
Financial assets:
Loans and Leases Receivable, Net Amount	$ 1,681,087	$ 2,393,942	$ 1,796,314

Fair Value Measurement (Narrati

Fair Value Measurement (Narrative) (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage Servicing Rights	$ 18,127	$ 21,490	$ 18,938	$ 22,011
Mortgage Servicing rights Valuation Allowance	(868)	(1,131)	(399)	$ (955)
Mortgage Servicing Rights Net Carrying balance	17,259	20,359	18,500
Mortgage Servicing Rights (MSR) Impairment (Recovery)	(469)	(176)	(600)
Impaired Collateral Dependant Loans, Recorded Investment	94,100	75,600	84,300
Determination Of Specific Allowance For Loan Losses	(7,800)	(11,800)	(12,900)
Collateral Dependant Impaired and Non Accrual Loans Carrying Amount	$ 86,300	63,800	71,400
Impairment of Real Estate		900	4,500
Impairment of Covered Other Real Esate Owned		$ 300	600
Percent of available for sale securities classified as level 2	92.00%
Percentage of Level 3 investments in available for sale investment portfolio	8.00%
True up liability, discount period	10 years
True-up Liabitlity Discount Rate	3.46%	3.05%
True-up Liability Effect of Change in Discount Rate By One Percent	$ 600	$ (600)
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	$ 9,600	8,600	9,300
Percent of cumulative shared loss payments under loss sharing agreements	25.00%
Percent of FDIC Intrinsic Loss Estimate	20.00%
Intrinsic Loss Estimate of the FDIC	$ 152,000
Percent of Asset Premium Paid	25.00%
Asset Premium Paid	$ 21,000
George Washington
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value of true up liability	$ 5,500	$ 5,100	$ 5,500
Percent of excess threshold paid by the Bank under loss sharing agreements	50.00%
Percent Theshold of Loss Sharing Agreements Paid by Bank	20.00%
Stated Threshold of Loss Sharing Agreements Paid by Bank	$ 34,400
Percent of Asset Discount Under Loss Sharing Percent of Asset Discount Under Loss Sharing Agreements	25.00%
Stated amount of Asset Discount Under Loss Sharing Agreements	$ 12,000
Percent of cumulative shared loss payments under loss sharing agreements	25.00%

(Narrative) Details)

(Narrative) Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Servicing Assets at Fair Value [Line Items]
Residential mortgage loans sold from held or sale portfolio with unpaid balances	$ 7.7	$ 50.3
Pre-tax gains on residential mortgages sold	0.2	0.6
Retained MSR's for which company receives servicing fees on sold loans	$ 3.3	45.2
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]
Servicing Asset	$ 2,000	2,600
Loan servicing fees	$ 1.4	$ 1.6

Mortgage Servicing Rights and75

Mortgage Servicing Rights and Mortgage Servicing Activity (Changes in the Carrying Amount of Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Mortage Servicing Rights Amortized Value [Roll Forward]
Mortgage Servicing Rights Beginning of Period	$ 18,938	$ 22,011	$ 22,011
Mortgage Servicing Rights Additions	28	470
Amortization of Mortgage Servicing Rights (MSRs)	(839)	(991)
Mortgage Servicing Rights, End of Period	18,127	21,490	18,938
Mortage Servicing Rights Valuation Rollforward [Roll Forward]
Mortgage Servicing rights Valuation Allowance Beginning of Period	(399)	(955)	(955)
Mortgage Servicing Rights (MSR) Impairment Recovery/(Additions)	(469)	(176)	(600)
Mortgage Servicing rights Valuation Allowance, End of Period	(868)	(1,131)	(399)
Mortgage Servicing Rights Net Carrying balance	17,259	20,359	18,500
Fair Value of Mortgage Servicing Rights	17,460	20,526	19,149
Level 3
Mortage Servicing Rights Valuation Rollforward [Roll Forward]
Fair Value of Mortgage Servicing Rights	$ 17,460	$ 20,526	$ 19,149

Mortgage Servicing Rights and76

Mortgage Servicing Rights and Mortgage Servicing Activity (Changes in Key Economic Assumptions) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Changes in Key Assumptions [Abstract]
Prepayment speed assumption (annual CPR)	13.30%
Decrease in fair value from 10% adverse change	$ 691
Decrease in fair value from 25% adverse change	$ 1,342
Discount rate assumption	9.39%
Decrease in fair value from 100 basis point adverse change	$ 528
Decrease in fair value from 200 basis point adverse change	$ 1,022
Assumptions Used to Estimate Fair Value, Weighted Average Life	94 months 55 days

Contingencies and Guarantees (S

Contingencies and Guarantees (Schedule of Commitments to Extend Credit) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan Commitments	$ 6,068,239	$ 6,385,147	$ 6,034,870
Commercial Loan
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan Commitments	3,609,266	3,992,089	3,691,193
Total consumer
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan Commitments	$ 2,458,973	$ 2,393,058	$ 2,343,677

Contingencies and Guarantees 78

Contingencies and Guarantees (Schedule of Guarantor Obligations) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	$ 248,423	$ 267,605	$ 315,732
Standby Letters of Credit
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	236,642	254,703	275,736
Loans Sold with Recourse
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	$ 11,781	$ 12,902	$ 39,996

Contingencies and Guarantees 79

Contingencies and Guarantees (Schedule of Changes in Repurchase Reserve) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 2,725	$ 7,250
Net increase/(decrease) to reserve	(53)	(402)
Net realized (losses)/gains	(47)	(198)
Balance at end of period	2,625	6,650
Residential Mortgages
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	2,700
Balance at end of period	$ 2,600	$ 6,700

Contingencies and Guarantees (N

Contingencies and Guarantees (Narratives) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Asset sales [Line Items]
Guarantor Obligations, Short-Term	$ 118,200
Financing Receivable, Repurchase Reserve	2,625	$ 2,725	$ 6,650	$ 7,250
Allowance for Loan and Lease Losses, Unfunded Lending Commitments	4,900	4,100	4,300
Residential Mortgages
Asset sales [Line Items]
Financing Receivable, Loans Sold to Third Party Investors	9,200	10,100	33,100
Financing Receivable, Repurchase Reserve	$ 2,600	$ 2,700	$ 6,700

Changes and Reclassifications81

Changes and Reclassifications Out of Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance at the beginning of the period, After-tax	$ (79,274)
Changes in unrealized securities' holding gains/(losses), before Tax	48,379	$ 34,117
Changes in unrealized securities' holding gains/(losses), Tax	17,562	11,941
Changes in unrealized securities' holding gains/(losses), After-tax	30,817	22,176
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity, Pre-tax	(1,441)	(504)
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred from available-for-sale to held-to-maturity, Tax	(147)	(176)
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred from available-for-sale to held-to-maturity , Net of Tax	(1,294)	(328)
Realized (gains) losses on sale of securities	295	(354)
Net losses/(gains) realized on sale of securities reclassified to noninterest income, Tax	107	(124)
Reclassified amount, net of tax	188	(230)
Balance at the beginning and end of the period, Pre-tax	(93,852)	(100,520)	$ (95,760)	$ (102,068)
Accumulated other comprehensive income reclassifications, benefit plan, tax	(32,746)	(35,181)	33,432	35,722
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(61,106)	(65,339)	(62,328)	(66,346)
Net gains/(losses) arising during the period, Pre-Tax	0
Net gains/(losses) arising during the period, Tax	0
Net gains/(losses) arising during the period, After-tax	0
Amortization of actuarial gain, Pre-Tax	2,168	1,138
Amortization of actuarial gain, Tax	773	398
Amortization of actuarial losses/(gains), Net of Tax	1,395	740
Amortization of prior service cost reclassified to other noninterest expense, before Tax	(260)	410
Amortization of prior service cost reclassified to other noninterest expense, Tax	(87)	143
Amortization of prior service cost reclassified to other noninterest expense, After-tax	(173)	267
Balance at the end of the Period, Pre-tax	(79,405)	(75,792)
Balance at the end of the period, Tax	(31,064)	(26,525)
Balance at the end of the period, After-tax	(48,341)	(49,267)	(79,274)
Unrealized and realized securities gains and losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance at the beginning of the Period, Pre-tax	(32,786)	(8,531)	(8,531)
Balance at the beginning of the period, Tax	(15,840)	(2,985)	(2,985)
Balance at the beginning of the period, After-tax	(16,946)	(5,546)	(5,546)
Balance at the end of the Period, Pre-tax	14,447	24,728	(32,786)	(8,531)
Balance at the end of the period, Tax	1,682	8,656	(15,840)	(2,985)
Balance at the end of the period, After-tax	$ 12,765	$ 16,072	$ (16,946)	$ (5,546)

Changes and Reclassifications82

Changes and Reclassifications Out of Accumulated Other Comprehensive Income (Tax Effect of Changes and Reclassifications Out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Changes and Reclassifications Out of Other Comprehensive Income [Abstract]
Realized (gains) losses on sale of securities	$ 295	$ (354)
Tax expense (benefit)	107	(124)
Reclassified amount, net of tax	$ 188	$ (230)