FirstMerit (FMER) 10-K 22 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information Document - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 19, 2016	Jun. 30, 2015
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-K
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		165,754,538
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 3,453,043,279

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$ 380,799	$ 480,998
Interest-bearing deposits in banks	83,018	216,426
Total cash and cash equivalents	463,817	697,424
Investment securities:
Held-to-maturity	2,674,093	2,903,609
Available-for-sale	3,967,735	3,545,288
Other investments	148,172	148,654
Loans held for sale	5,472	13,428
Loans	16,076,945	15,326,147
Allowance for loan losses	(153,691)	(143,649)
Net loans	15,923,254	15,182,498
Premises and equipment, net	319,488	332,297
Goodwill	741,740	741,740
Intangible assets	60,628	71,020
FDIC acquired other real estate	2,134	49,641
Accrued interest receivable and other assets	1,218,071	1,216,748
Total assets	25,524,604	24,902,347
Deposits:
Noninterest-bearing	5,942,248	5,786,662
Interest-bearing	3,476,729	3,028,888
Savings and money market accounts	8,450,123	8,399,612
Certificates and other time deposits	2,238,903	2,289,503
Total deposits	20,108,003	19,504,665
Federal funds purchased and securities sold under agreements to repurchase	1,037,075	1,272,591
Wholesale borrowings	580,648	428,071
Long-term debt	505,173	505,192
Accrued taxes, expenses and other liabilities	353,610	357,547
Total liabilities	22,584,509	22,068,066
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
Common stock warrant	0	3,000
Common Stock, without par value; authorized 300,000,000 shares; issued: December 31, 2015 - 170,183,515 shares; December 31, 2014 - 170,183,515 shares	127,937	127,937
Capital surplus	1,386,677	1,393,090
Accumulated other comprehensive loss	(79,274)	(71,892)
Retained earnings	1,519,438	1,404,717
Treasury stock, at cost: December 31, 2015 - 4,425,927; December 31, 2014 - 4,793,566 shares	(114,683)	(122,571)
Total shareholders’ equity	2,940,095	2,834,281
Total liabilities and shareholders’ equity	$ 25,524,604	$ 24,902,347

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - shares	Dec. 31, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Common Stock, Shares Authorized	300,000,000	300,000,000
Common Stock, Shares, Issued	170,183,515	170,183,515
Non-cumulative perpetual preferred stock, series A	115,000
Preferred Stock, Shares Outstanding		100,000
Treasury Stock, Shares	4,425,461	4,793,566
Series A Non-Cumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Non-cumulative perpetual preferred stock, series A		115,000
Preferred Stock, Shares Outstanding	100,000

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest income:
Loans and loans held for sale	$ 647,783	$ 682,328	$ 635,872
Investment securities:
Taxable	129,809	128,363	108,824
Tax-exempt	21,925	21,807	21,107
Total investment securities interest	151,734	150,170	129,931
Total interest income	799,517	832,498	765,803
Deposits:
Interest bearing	3,054	2,963	2,543
Savings and money market accounts	22,385	22,101	24,406
Certificates and other time deposits	10,822	10,844	9,649
Federal funds purchased and securities sold under agreements to repurchase	1,126	991	1,240
Wholesale borrowings	4,662	5,210	3,893
Long-term debt	16,173	14,821	13,287
Total interest expense	58,222	56,930	55,018
Net interest income	741,295	775,568	710,785
Provision for loan losses	45,100	52,279	33,684
Net interest income after provision for loan losses	696,195	723,289	677,101
Noninterest income:
Trust department income	42,125	39,949	34,770
Service charges on deposits	66,460	71,457	74,399
Credit card fees	54,643	52,666	50,542
ATM and other service fees	25,588	24,179	19,155
Bank owned life insurance income	15,747	19,177	16,926
Investment services and insurance	15,423	15,145	12,777
Investment securities gains/(losses), net	957	166	(2,803)
Loan sales and servicing income	9,566	16,044	23,069
Other operating income	38,489	42,741	41,508
Total noninterest income	268,998	281,524	270,343
Noninterest expense:
Salaries, wages, pension and employee benefits	348,808	358,970	354,016
Net occupancy expense	55,937	59,436	49,510
Equipment expense	47,926	48,499	41,875
Stationery, supplies and postage	13,424	15,587	14,199
Bankcard, loan processing and other costs	47,081	45,625	71,929
Professional services	19,578	21,813	40,680
Amortization of intangibles	10,392	11,735	8,392
FDIC insurance expense	20,730	20,481	17,707
Other operating expense	74,814	82,773	85,945
Total noninterest expense	638,690	664,919	684,253
Income before income tax expense	326,503	339,894	263,191
Income tax expense	97,019	101,943	79,507
Net income	229,484	237,951	183,684
Less: Net income allocated to participating shareholders	1,836	1,930	1,545
Preferred Stock dividends	5,876	5,876	5,337
Net income attributable to common shareholders	$ 221,772	$ 230,145	$ 176,802
Basic earnings per common share	$ 1.34	$ 1.39	$ 1.18
Diluted earnings per common share	1.33	1.39	1.18
Cash dividend per common share	$ 0.66	$ 0.64	$ 0.64
Weighted average number of common shares outstanding - basic	165,669	165,296	149,607
Weighted average number of common shares outstanding - diluted	166,127	166,054	150,421

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, 2012	$ 1,645,202	$ 0	$ 127,937	$ 0	$ 475,979	$ (16,205)	$ 1,195,850	$ (138,359)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	183,684	0	0	0	0	0	183,684	0
Other comprehensive income	(50,671)	0	0	0	0	(50,671)	0	0
Comprehensive income	133,013	0	0	0	0	(50,671)	183,684	0
Cash dividends - Preferred Stock	(5,337)	0	0	0	0	0	(5,337)	0
Cash dividends - common stock	(96,222)	0	0	0	0	0	(96,222)	0
Common stock issued in connection with Citizens acquisition (55,468,283 shares)	925,272				925,272
Nonvested (restricted) shares granted	(6,813)		0	0	(19,790)	0		12,977
Restricted stock activity	(2,708)	0	0	0	1,261	0	0	(3,969)
Deferred compensation trust	0	0	0	0	(434)	0	0	434
Issuance Non-Cumulative Perpetual Preferred Stock, Series A	96,550	100,000			(3,450)
Issuance of a Common Stock warrant to the U.S. Treasury for Citizens TARP warrant	(3,000)			(3,000)
Share-based compensation	10,937	0	0	0	10,937	0	0	0
Repurchase of common stock warrant	0
Ending Balance at Dec. 31, 2013	2,702,894	100,000	127,937	3,000	1,390,643	(66,876)	1,277,975	(129,785)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	237,951	0	0	0	0	0	237,951	0
Other comprehensive income	(5,016)	0	0	0	0	(5,016)	0	0
Comprehensive income	232,935	0	0	0	0	(5,016)	237,951	0
Cash dividends - Preferred Stock	(5,876)	0	0	0	0	0	(5,876)	0
Cash dividends - common stock	(105,333)	0	0	0	0	0	(105,333)	0
Nonvested (restricted) shares granted	99			0	(13,469)			13,568
Restricted stock activity	(4,360)	0	0	0	1,219	0	0	(5,579)
Deferred compensation trust	0	0	0	0	(775)	0	0	775
Issuance of a Common Stock warrant to the U.S. Treasury for Citizens TARP warrant	0
Share-based compensation	13,922	0	0	0	13,922	0	0	0
Repurchase of common stock warrant	0
Ending 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	229,484	0	0	0	0	0	229,484	0
Other comprehensive income	(7,382)	0	0	0	0	(7,382)	0	0
Comprehensive income	222,102	0	0	0	0	(7,382)	229,484	0
Cash dividends - Preferred Stock	(5,876)	0	0	0	0	0	(5,876)	0
Cash dividends - common stock	(108,887)	0	0	0	0	0	(108,887)	0
Nonvested (restricted) shares granted	0			0	(14,798)		0	14,798
Restricted stock activity	(4,395)	0	0	0	1,917	0	0	(6,312)
Deferred compensation trust	0	0	0	0	(598)	0	0	598
Issuance of a Common Stock warrant to the U.S. Treasury for Citizens TARP warrant	0			(3,000)
Share-based compensation	15,020	0	0	0	15,020	0	0	0
Adjustments to Additional Paid in Capital, Other	9,200				(9,150)
Repurchase of common stock warrant	(12,150)
Ending Balance at Dec. 31, 2015	$ 2,940,095	$ 100,000	$ 127,937	$ 0	$ 1,386,677	$ (79,274)	$ 1,519,438	$ (114,683)

Consolidated Statements of Cha6

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Cash dividend per common share	$ 0.66	$ 0.64	$ 0.64
Stock Issued During Period, Shares, Restricted Stock Award, Gross	680,066	595,906	563,257
Treasury stock, shares, acquired	312,427	262,140	217,674
Stock Issued During Period, Shares, Treasury Stock Reissued	238,670	291,419	198,207
Stock Issued During Period, Shares, New Issues	0	0	55,468,283
Stock Repurchased During Period, Shares	2,571,998	0	2,408,203

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities
Net income	$ 229,484	$ 237,951	$ 183,684
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	45,100	52,279	33,684
Provision (benefit) for deferred income taxes	47,269	44,666	(17,819)
Depreciation and amortization	63,919	53,802	38,236
Benefit attributable to FDIC loss share	6,373	2,920	10,790
Accretion of acquired loans	(92,995)	(136,776)	(154,487)
Amortization and accretion of investment securities, net
Available for sale	9,393	11,734	17,274
Held to maturity	4,828	4,800	7,609
Losses (gains) on sales and calls of available-for-sale investment securities, net	(957)	(166)	2,803
Originations of loans held for sale	(68,747)	(358,301)	(550,193)
Proceeds from sales of loans, primarily mortgage loans sold in the secondary markets	77,913	363,732	574,321
Gains on sales of loans, net	(1,210)	(7,237)	(12,067)
Amortization of intangible assets	10,392	11,735	8,392
Recognition of stock compensation expense	15,020	13,922	10,937
Net decrease (increase) in other assets	11,751	(26,707)	181,772
Net increase (decrease) in other liabilities	(43,833)	16,283	(25,570)
NET CASH PROVIDED BY OPERATING ACTIVITIES	313,700	284,637	309,366
Proceeds from sale of securities
Available-for-sale	370,946	22,463	2,179,728
Held-to-maturity	668	32,486	89,554
Other	1,413	7,088	897
Proceeds from prepayments, calls, and maturities
Available-for-sale	584,833	486,100	699,647
Held-to-maturity	438,882	390,882	245,259
Other	165	0	0
Purchases of securities
Available-for-sale	(1,371,644)	(754,518)	(1,059,130)
Held-to-maturity	(214,062)	(378,678)	(1,832,993)
Other	(402)	(388)	(3,098)
Net decrease (increase) in loans and leases	(719,311)	(952,518)	171,929
Purchases of premises and equipment	(37,358)	(69,346)	(40,632)
Sales of premises and equipment	9,472	26,509	1,110
Cash received for acquisition, net of cash paid	0	0	188,948
NET CASH PROVIDED (USED) BY INVESTING ACTIVITIES	(936,398)	(1,189,920)	641,219
Financing Activities
Net increase in demand accounts	603,427	329,786	835,011
Net increase (decrease) in savings and money market accounts	50,511	(187,555)	176,513
Net (decrease) in certificates and other time deposits	(50,600)	(171,167)	(514,103)
Net increase (decrease) in securities sold under agreements to repurchase	(235,516)	421,056	(367,995)
Increase (decrease) in long-term debt	0	180,764	249,930
Net increase (decrease) in wholesale borrowings	152,577	227,471	(655,603)
Repurchase of common stock warrant	12,150	0	0
Net proceeds from issuance of preferred stock	0	0	96,550
Cash dividends - common	(108,887)	(105,333)	(96,222)
Cash dividends - preferred	(5,876)	(5,876)	(5,337)
Restricted stock activity	(4,395)	(4,261)	(9,521)
NET CASH PROVIDED (USED) BY FINANCING ACTIVITIES	389,091	684,885	(290,777)
Increase (decrease) in cash and cash equivalents	(233,607)	(220,398)	659,808
Cash and cash equivalents at beginning of year	697,424	917,822	258,014
Cash and cash equivalents at end of year	463,817	697,424	917,822
SUPPLEMENTAL DISCLOSURE OF CASH FLOWS INFORMATION:
Non-cash transaction: Common Stock issued in merger with Citizens	0	0	925,211
Non-cash transaction: Consideration from the warrant issued to the Treasury for Citizens TARP	0	0	3,000
Cash paid during the year for:
Interest expense	57,284	55,424	50,055
Federal income taxes	$ 46,825	$ 35,981	$ 27,662

Statement of Comprehensive Inco

Statement of Comprehensive Income Statement - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Income before income tax expense	$ 326,503	$ 339,894	$ 263,191
Income tax expense	97,019	101,943	79,507
Net income	229,484	237,951	183,684
Changes in unrealized securities' holding gains/(losses), Pre-Tax		38,864
Changes in unrealized securities' holding gains/(losses), Tax		13,602
Changes in unrealized securities' holding gains/(losses), After-tax		25,262
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity, Pre-Tax		(2,157)
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity, Tax		(753)
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity, After-tax		(1,404)
Net losses/(gains) realized on sale of securities reclassified to noninterest income, Pre-Tax		(166)
Net losses/(gains) realized on sale of securities reclassified to noninterest income, Tax		(58)
Reclassified amount, net of tax		108
Net change in unrealized gains/(losses) on securities available for sale, Pre-Tax	(24,255)	36,541	(130,331)
Net change in unrealized gains/(losses) on securities available for sale, Tax	(12,855)	12,791	(45,617)
Net change in unrealized gains/(losses) on securities available for sale, After-tax	(11,400)	23,750	(84,714)
Net gains/(losses) arising during the period, Pre-Tax		(49,552)	47,939
Net gains/(losses) arising during the period, Tax		(17,344)	16,779
Net gains/(losses) arising during the period, After-tax		(32,208)	31,160
Amortization of actuarial gain, Pre-Tax		3,166	4,437
Amortization of actuarial gain, Tax		1,108	1,553
Amortization of actuarial gain, After-tax		2,058	2,884
Amortization of prior service cost reclassified to other noninterest expense, Pre-Tax		2,131	(1)
Amortization of prior service cost reclassified to other noninterest expense, Tax		747	0
Amortization of prior service cost reclassified to other noninterest expense, After-tax		1,384	(1)
Net change from defined benefit pension plans, Pre-Tax	6,308	(44,255)	52,375
Net change from defined benefit pension plans, Tax	2,290	(15,489)	18,332
Net change from defined benefit pension plans, After-tax	4,018	(28,766)	34,043
Total other comprehensive gains/(losses), Pre-Tax	(17,947)	(7,714)	(77,956)
Total other comprehensive gains/(losses), Tax	(10,565)	(2,698)	(27,285)
Total other comprehensive gains/(losses), After-tax	(7,382)	(5,016)	(50,671)
Comprehensive income, Pre-Tax	308,556	332,180	185,235
Comprehensive income, Tax	86,454	99,245	52,222
Comprehensive income, After-tax	$ 222,102	$ 232,935	$ 133,013

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	The Corporation is a diversified financial services company headquartered in Akron, Ohio with 366 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. 1 . 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. The accounting and reporting policies of the Corporation conform to GAAP and to general practices within the financial services industry. In preparing these accompanying consolidated financial statements, subsequent events were evaluated through the time the consolidated 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. The following is a description of the Corporation’s significant accounting policies. (a) Principles of Consolidation The Parent Company is a bank holding company whose principal asset is the common stock of its wholly-owned subsidiary, the Bank. The Parent Company has one other active subsidiary, FirstMerit Risk Management, Inc. All significant intercompany balances and transactions have been eliminated in consolidation. (b) Use of Estimates Management must make certain estimates and assumptions that affect the amounts reported in the financial statements and related notes. If these estimates prove to be inaccurate, actual results could differ from those reported. (c) Business Combinations Business combinations are accounted for using the acquisition method of accounting. Under this accounting method, the acquired company's net assets are recorded at fair value on the date of acquisition, and the results of operations of the acquired company are combined with the Corporation's results from that date forward. Costs related to the acquisition are expensed as incurred. The difference between the purchase price and the fair value of the net assets acquired (including intangible assets with finite lives) is recorded as goodwill. The accounting policy for goodwill and intangible assets is summarized in this note under the heading "Goodwill and Other Intangible Assets". (d) Cash and Cash Equivalents Cash and cash equivalents consist of cash and due from banks, interest bearing deposits in other banks and checks in the process of collection. (e) Investment Securities Debt securities are classified as held-to-maturity when the Corporation has the positive intent and ability to hold the securities to maturity. These securities are reported at amortized cost, adjusted for amortization of premiums and accretion of discounts to maturity using the effective yield method. This method produces a constant rate of return on the adjusted carrying amount. Securities are classified as available-for-sale when the Corporation intends to hold the securities for an indefinite period of time but may be sold in response to changes in interest rates, prepayment risk, liquidity needs or other factors. Securities available-for-sale are reported at fair value, with unrealized gains and losses, net of income tax, reported as a separate component of other comprehensive income (loss) in shareholders’ equity. In certain situations, Management may elect to transfer certain debt securities from the available-for-sale to the held to maturity classification. In such cases, any unrealized gain or loss included in accumulated other comprehensive income (loss) at the time of transfer is amortized over the remaining life of the security as a yield adjustment such that only the remaining initial discount or premium from the purchase date is recognized in income. Interest and dividends on securities, including the amortization of premiums and accretion of discount, are included in interest income. Realized gains or losses on the sales of available-for-sale securities are recorded on the trade date and determined using the specific identification method. On at least a quarterly basis, Management evaluates securities that are in an unrealized loss position for OTTI. An investment security is deemed impaired if the fair value of the investment is less than its amortized cost. As part of the impairment evaluation, Management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in earnings, and 2) OTTI related to other factors, such as liquidity conditions in the market or changes in market interest rates, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. For equity securities, the entire amount of impairment is recognized in earnings. Other investments include FHLB and FRB stock. As a member of the FHLB system, the Bank is required to own a certain amount of stock based on the level of borrowings and other factors. The Bank is also a member of its regional FRB. Both FHLB and FRB stock are carried at cost and evaluated for impairment based on the ultimate recovery of par value. Cash and stock dividends received on the stock are reported as interest income in the Consolidated Statement of Income. (f) Originated Loans and Loan Income 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 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. (g) Loans Held for Sale Mortgage loans originated and intended for sale in the secondary market are carried at fair value. The election of the fair value option aligns the accounting for these loans with the related economic hedges. Loan origination fees are recorded when earned and related direct loan origination costs are recognized when incurred. Upon their sale, differences between carrying value and sales proceeds realized are recorded to loan sales and servicing income in the Consolidated Statement of Income. A discussion of the valuation methodology applied to the Corporation’s loans held for sale is described in Note 17 ( Fair Value Measurement ). (h) Nonperforming Loans Loans and leases on which payments are past due for 90 days are placed on nonaccrual, with the exception of certain commercial, credit card and mortgage loans and loans that are fully secured and in process of collection. Credit card loans on which payments are past due for 120 days are placed on nonaccrual status. Interest on mortgage loans is accrued until Management deems it uncollectible based upon the specific identification method. Past due status is based on the contractual terms of the loan. Loans are placed on nonaccrual or charged off at an earlier date if principal or interest is considered uncollectible. 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. When a loan is placed on nonaccrual status, interest deemed uncollectible that had been accrued in prior years is charged against the allowance for loan losses and interest deemed uncollectible accrued in the current year is reversed against interest income. 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 payment cycles. Under the Corporation’s credit policies and practices, individually impaired loans include all nonaccrual and restructured commercial, agricultural, construction, and commercial real estate loans, but exclude certain aggregated consumer loans, mortgage loans, and leases classified as nonaccrual. Loan impairment for all loans is measured based on either the present value of expected future cash flows discounted at the loan’s effective interest rate at inception, at the observable market price of the loan, or the fair value of the collateral for certain collateral dependent loans. Restructured loans are those on which concessions in terms have been made as a result of deterioration in a borrower’s financial condition. In general, the modification or restructuring of a debt constitutes a troubled debt restructuring if the Corporation for economic or legal reasons related to the borrower’s financial difficulties grants a concession to the borrower that the Corporation would not otherwise consider under current market conditions. Debt restructurings or loan modifications for a borrower do not necessarily constitute troubled debt restructurings. Troubled debt restructurings do not necessarily result in nonaccrual loans. Specific allowances for loan losses are established for certain consumer, commercial and commercial real estate loans whose terms have been modified in a TDR. Acquired nonimpaired loans are placed on nonaccrual and considered and reported as nonperforming or past due using the same criteria applied to the originated portfolio. Acquired impaired loans are not classified as nonperforming assets as the loans are considered to be performing under the provisions of ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality (“ASC 310-30”). Acquired loans restructured after acquisition are not considered TDRs for purposes of the Corporation’s accounting and disclosure if the loans evidenced credit deterioration as of the acquisition date and are accounted for in pools. (i) Allowance for Loan Losses The allowance for loan losses is Management’s estimate of the amount of probable credit losses inherent in the loan portfolio at the balance sheet date. Increases to the allowance for loan losses are made by charges to the provisions for loan losses. Loans deemed uncollectible are charged against the allowance for loan losses. Recoveries of previously charged-off amounts are credited to the allowance for loan losses. Management estimates credit losses based on individual loans determined to be impaired and on all other loans grouped based on similar risk characteristics. The Corporation’s historical loss component is the most significant of the allowance for loan losses 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). Loans are pooled based on similar risk characteristics supported by observable data. The historical loss experience component of the allowance for loan losses 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. 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 individual borrower. Certain commercial loans are reviewed on an annual, quarterly or rotational basis or as Management becomes aware of information affecting a borrower’s ability to fulfill its obligation. 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. 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, if any, and assign a specific allowance to the loan if needed. The allowance for loan losses relating to originated loans that have become impaired is based on either expected cash flows discounted at the loan’s original effective interest rate, the observable market price, or the fair value of the collateral for certain collateral dependent loans. Management also considers internal and external factors such as economic conditions, credit quality trends, 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 also assesses the credit risk associated with off-balance sheet loan commitments and letters of credit. The liability for off-balance sheet credit exposure related to loan commitments and other credit guarantees is included in other liabilities on the Consolidated Balance Sheet. (j) Acquired Loans, FDIC acquired loans, covered and Related Loss Share Receivable Acquired loans (nonimpaired and impaired) are initially measured at fair value as of the acquisition date. The fair value estimates for acquired loans are based on the estimate of expected cash flows, both principal and interest and prepayments, discounted at prevailing market interest rates. Credit discounts representing the principal losses expected over the life of the loan are also a component of the initial fair value; therefore, an allowance for loan losses is not recorded at the acquisition date. The Corporation evaluates acquired loans for impairment in accordance with the provisions of ASC 310-30. Acquired loans are considered impaired if there is evidence of credit deterioration since origination and if it is probable at time of acquisition that all contractually required payments will not be collected. In determining the acquisition date fair value of acquired impaired loans, and in subsequent accounting, the Corporation generally aggregates impaired loans into pools of loans with common characteristics. Each pool is accounted for as a single asset with one composite interest rate and an aggregate expectation of cash flows. Expected cash flows at the acquisition date in excess of the fair value of the loans is referred to as the accretable yield and recorded as interest income over the life of the loans. Acquired impaired loans are not classified as nonaccrual or nonperforming as they are considered to be accruing loans because their interest income relates to the accretable yield recognized at the pool level and not to contractual interest payments at the loan level. Subsequent to the acquisition date, increases in expected cash flows will generally result in a recovery of any previously recorded ALL, to the extent applicable, and/or a reclassification from the nonaccretable difference to accretable yield, which will be recognized prospectively. The present value of any decreases in expected cash flows after the acquisition date will generally result in an impairment charge recorded as a provision for loan losses, resulting in an increase to the ALL, net of any expected reimbursement under FDIC Loss Share Agreements, to the extent applicable. Revolving loans, including lines of credit and credit cards loans, and leases are excluded from acquired impaired loan accounting. For acquired nonimpaired loans, the difference between the acquisition date fair value and the contractual amounts due at the acquisition date represents the fair value adjustment. Fair value adjustments may be discounts (or premiums) to a loan’s cost basis and are accreted (or amortized) to interest income over the loan’s remaining life using the level yield method. Subsequent to the acquisition date, the method utilized to estimate the required allowance for loan losses for these loans is similar to originated loans, however, the Corporation records an allowance for loan losses only when the required allowance, net of any expected reimbursement under any FDIC Loss Share Agreements, to the extent applicable, exceeds the remaining fair value adjustment. Acquired nonimpaired loans are reported net of the unamortized fair value adjustment. Nonimpaired acquired loans are placed on nonaccrual status and reported as nonperforming or past due using the same criteria applied to the originated portfolio. Loans acquired in FDIC assisted transactions and covered under FDIC Loss Share Agreements are referred to as covered loans. Covered loans are recorded at fair value at the date of acquisition exclusive of the FDIC Loss Share Agreements. No allowance for loan losses related to covered loans is recorded on the acquisition date as the fair value of the loans acquired incorporates assumptions regarding credit risk. The covered loans are subsequently valued and accounted for in the same manner as the acquired loans disclosed above. A loss share receivable is recorded at the acquisition date which represents the estimated fair value of reimbursement the Corporation expects to receive from the FDIC for incurred losses on certain covered loans. The fair value measurement reflects counterparty credit risk and other uncertainties. The loss share receivable continues to be measured on the same basis as the related indemnified loans. Deterioration in the credit quality of the loans (recorded as an adjustment to the allowance for covered loan losses) would immediately increase the basis of the loss share receivable, with the offset recorded through the consolidated statement of comprehensive income. Increases in the credit quality or cash flows of loans (reflected as an adjustment to yield and accreted into income over the remaining life of the loans) decrease the basis of the loss share receivable, with such decrease being accreted into income over 1) the same period or 2) the life of the loss share agreements, whichever is shorter. Loss assumptions used in the basis of the loss share receivable are consistent with the loss assumptions used to measure the related covered loans. Upon the determination of an incurred loss the loss share receivable will be reduced by the amount owed by the FDIC. A corresponding claim receivable is recorded in accrued interest receivable and other assets on the Consolidated Balance Sheet until cash is received from the FDIC. FDIC acquired loans are loans acquired in FDIC assisted transactions for which the FDIC loss share agreement has expired. FDIC acquired loans are subsequently valued and accounted for in the same manner as the acquired loans disclosed above, with the exception that there is no offsetting loss share receivable. An acquired, FDIC acquired or covered loan may be resolved either through receipt of payment (in full or in part) from the borrower, the sale of the loan to a third party, or foreclosure of the collateral. In the period of resolution of a nonimpaired loan, any remaining unamortized fair value adjustment is recognized as interest income. In the period of resolution of an impaired loan accounted for on an individual basis, the difference between the carrying amount of the loan and the proceeds received is recognized as a gain or loss within noninterest income. The majority of impaired loans are accounted for within a pool of loans which results in any difference between the proceeds received and the loan carrying amount being deferred as part of the carrying amount of the pool. The accretable amount of the pool remains unaffected from the resolution until the subsequent quarterly cash flow re-estimation. Favorable results from removal of the resolved loan from the pool increase the future accretable yield of the pool, while unfavorable results are recorded as impairment in the quarter of the cash flow re-estimation. Acquired, FDIC acquired or covered impaired loans subject to modification are not removed from a pool even if those loans would otherwise be deemed TDRs as the pool, and not the individual loan, represents the unit of account. For further discussion of the Corporation’s acquisitions and loan accounting, see Note 3 ( Loans ), and Note 4 ( Allowance for Loan Losses ). (k) Equipment Lease Financing The Corporation leases equipment directly to customers. The net investment in financing leases includes the aggregate amount of lease payments to be received and the estimated residual values of the equipment, less unearned income. Income from lease financing is recognized over the lives of the leases on an approximate level rate of return on the unrecovered investment. The residual value represents the estimated fair value of the leased asset at the end of the lease term. Unguaranteed residual values of leased assets are reviewed at least annually for impairment. Declines in residual values determined to be other-than-temporary are recognized in earnings in the period such determinations are made. (l) Mortgage Servicing Rights The Corporation periodically sells residential real estate loans while retaining the rights and obligations to perform the servicing of such loans. Whenever the Corporation undertakes an obligation to service such loans, Management assesses whether a servicing asset or liability should be recognized. A servicing asset is recognized whenever the compensation for servicing is expected to exceed servicing costs. Likewise, a servicing liability would be recognized in the event that servicing fees to be received are not expected to adequately compensate the Corporation for its expected cost. Servicing assets associated with retained mortgage servicing rights are presented within other assets on the balance sheet. The Corporation does not presently have any servicing liabilities. MSRs are initially valued at fair value. Servicing assets and liabilities are subsequently measured using the amortization method which requires servicing rights to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. Amortization is recorded in loan sales and servicing income in the Consolidated Statement of Income. At each reporting period, MSRs are assessed for impairment based on fair value of those rights on a stratum-by-stratum basis. The Corporation stratifies its servicing rights portfolio into tranches based on loan type and interest rate, the predominant risk characteristics of the underlying loans. Any impairment is recognized through a valuation allowance for each impaired stratum through a charge to income. If the Corporation later determines that all or a portion of the impairment no longer exists for a particular grouping, a reduction of the allowance may be recorded as an increase to income. The Corporation also reviews MSRs for OTTI each quarter and recognizes a direct write-down when the recoverability of a recorded allowance for impairment is determined to be remote. Unlike an allowance for impairment, a direct write-down permanently reduces the unamortized cost of the MSR and the allowance for impairment. MSRs do not trade in an active open market with readily observable market prices. Although sales of MSRs do occur, the exact terms and conditions may not be available. As a result, the fair value of MSRs is estimated using discounted cash flow modeling techniques which require Management to make assumptions regarding future net servicing income, adjusted for such factors as net servicing income, discount rate and prepayments. The primary assumptions used in determining the current fair value of the Corporation’s MSRs as well as a sensitivity analysis are presented in Note 6 ( Mortgage Servicing Rights and Mortgage Servicing Activity ). The Corporation generally records loan administration fees for servicing loans for investors on the accrual basis of accounting. Servicing fees and late fees related to delinquent loan payments are also recorded on the accrual basis of accounting. (m) Depreciation and Amortization Premises and equipment are reported at cost less accumulated depreciation and amortization and principally depreciated using the straight-line method over their estimated useful lives. Estimated useful lives for furniture and equipment range from three to 15 years, and depreciable buildings ranges from 10 to 35 years. Amortization of leasehold improvements is computed on the straight-line method based on related lease terms or the estimated useful lives of the assets of up to 15 years, whichever is shorter. The Corporation purchases, as well as internally develops and customizes, certain software to enhance or perform internal business functions. Software development costs incurred in the planning and post-development project stages are charged to noninterest expense. Costs associated with designing software configuration and interfaces, installation, coding programs and testing systems are capitalized and amortized using the straight-line method over periods ranging from three to seven years. (n) Goodwill and Other Intangible Assets Goodwill represents the amount by which the cost of net assets acquired in a business combination exceeds their fair value. Goodwill is evaluated for impairment on an annual basis or whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The goodwill impairment test is a two-step process. The first step compares the reporting unit’s estimated fair values, including goodwill, to its carrying amount. If the carrying amount exceeds its fair value, then goodwill impairment may be indicated. The second step allocates the reporting units fair value to its assets and liabilities. If the unallocated fair value does not exceed the carrying amount of goodwill then an impairment loss would be recognized as a charge to earnings. Other intangible assets represent the present value of the future stream of income to be derived from the purchase of core deposits and trust relationships. Other intangible assets are amortized on an accelerated basis over their estimated useful lives. Goodwill and other intangible assets deemed to have indefinite lives are not amortized. (o) Other Real Estate Owned Other real estate owned is included in other assets in the consolidated balance sheets and is primarily comprised of property acquired through loan foreclosure proceedings or acceptance of a deed-in-lieu of foreclosures, and loans classified as in-substance foreclosure. Other real estate owned is recorded at the lower of the recorded investment in the loan at the time of transfer or the fair value of the underlying property collateral, less estimated selling costs. Any write-down in the carrying value of a property at the time of acquisition is charged to the allowance for loan losses. Any subsequent write-downs to reflect current fair market value, as well as gains and losses on disposition and revenues and expenses incurred in maintaining such properties, are treated as period costs. Other real estate owned also includes bank premises formerly but no longer used for banking. Banking premises are transferred at the lower of carrying value or estimated fair value, less estimated selling costs. (p) Derivative Instruments and Hedging Activities The Corporation uses interest rate swaps, interest rate lock commitments and forward contracts sold to hedge interest rate risk for asset and liability management purposes. Foreign exchange derivatives are entered into to accommodate the needs of customers. All derivatives are recorded as either other assets or other liabilities at fair value. Credit risk associated with derivatives is reflected in the fair values recorded for those positions. Accounting for changes in fair value (i.e., gains or losses) of derivatives differs depending on whether the derivative has been designated and qualifies as part of a hedging relationship, and further, on the type of hedging relationship. For derivatives that are not designated as hedging instruments, the gain or loss is recognized immediately in other operating income. A derivative that is designated and qualifies as a hedging instrument must be designated a fair value hedge, a cash flow hedge or a hedge of a net investment in a foreign operation. The Corporation does not have any cash flow hedges or derivatives that hedge net investments in foreign operations. Effectiveness measures the extent to which changes in the fair value of a derivative instrument offset changes in the fair value of the hedged item. If the relationship between the change in the fair value of the derivative instrument and the fair value of the hedged item falls within a range considered to be the industry norm, the hedge is considered highly-effective and qualifies for hedge accounting. A hedge is ineffective if the offsetting difference between the fair values falls outside the acceptable range. A fair value hedge is used to limit exposure to changes in the fair value of existing assets, liabilities and firm commitments caused by changes in interest rates or other economic factors. The Corporation recognizes the gain or loss on these derivatives, as well as the related gain or loss on the underlying hedged item, in earnings during the period in which the fair value changes. If a hedge is perfectly effective, the change in the fair value of the hedged item will be offset, resulting in no net effect on earnings. A cash flow hedge is used to minimize the variability of future cash flows that is caused by changes in interest rates or other economic factors. The effective portion of a gain or loss on any cash flow hedge is reported as a component of accumulated other comprehensive income (loss) and reclassified into other operating income in the same period or periods that the hedged transaction affects earnings. Any ineffective portion of the derivative gain or loss is recognized in other operating income during the current period. The Corporation enters into commitments to originate mortgage loans whereby the interest rate on the prospective loan is d

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2015
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. December 31, 2015 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale Debt securities: U.S. treasury bonds & notes $ 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 Nonagency 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 December 31, 2014 (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 $ — $ (18 ) $ 2,482 U.S. states and political subdivisions 221,052 6,756 (466 ) 227,342 Residential mortgage-backed securities: U.S. government agencies 951,839 22,377 (3,218 ) 970,998 Commercial mortgage-backed securities: U.S. government agencies 104,176 598 (1,371 ) 103,403 Residential collateralized mortgage-backed securities: U.S. government agencies 1,698,015 4,777 (26,225 ) 1,676,567 Nonagency 7 — — 7 Commercial collateralized mortgage-backed securities: U.S. government agencies 222,876 863 (1,405 ) 222,334 Asset-backed securities: Collateralized loan obligations 297,446 11 (9,613 ) 287,844 Corporate debt securities 61,652 — (10,315 ) 51,337 Total debt securities 3,559,563 35,382 (52,631 ) 3,542,314 Equity Securities Marketable equity securities 2,974 — — 2,974 Total equity securities 2,974 — — 2,974 Total securities available for sale $ 3,562,537 $ 35,382 $ (52,631 ) $ 3,545,288 Securities held-to-maturity Debt securities U.S. treasury notes & bonds $ 5,000 $ — $ — $ 5,000 U.S. government agency debentures 25,000 — (537 ) 24,463 U.S. states and political subdivisions 517,824 12,645 (191 ) 530,278 Residential mortgage-backed securities: U.S. government agencies 580,727 7,495 (3,045 ) 585,177 Commercial mortgage-backed securities: U.S. government agencies 58,143 281 (329 ) 58,095 Residential collateralized mortgage-backed securities: U.S. government agencies 1,368,534 718 (38,875 ) 1,330,377 Commercial collateralized mortgage-backed securities: U.S. government agencies 257,642 557 (6,768 ) 251,431 Corporate debt securities 90,739 412 (52 ) 91,099 Total securities held to maturity $ 2,903,609 $ 22,108 $ (49,797 ) $ 2,875,920 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 million in 11 of the 37 U.S. states in which it holds investments. (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) December 31, 2014 U.S. State # of Issuers Average Issue Size, Fair Value Amortized Cost Fair Value Michigan 169 $ 842 $ 138,325 $ 142,292 Ohio 137 979 130,741 134,127 Illinois 66 1,897 121,560 125,169 Wisconsin 77 841 62,543 64,776 Texas 64 801 50,307 51,293 Pennsylvania 45 1,000 44,443 45,006 Washington 30 952 27,987 28,558 Minnesota 42 674 27,740 28,326 New Jersey 37 746 26,755 27,612 Missouri 19 1,011 18,764 19,207 New York 19 628 11,659 11,929 Other 120 650 76,849 78,020 Total general obligation bonds 825 $ 917 $ 737,673 $ 756,315 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, 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 December 31, 2015 did not uncover any facts or circumstances resulting in significantly different credit ratings than those assigned by a nationally recognized credit rating agency. FRB and FHLB stock constitute the majority of other investments on the Consolidated Balance Sheet. December 31, (In thousands) 2015 2014 FRB stock $ 56,083 $ 55,681 FHLB stock 91,714 92,547 Other 375 426 Total other investments $ 148,172 $ 148,654 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 $2.9 billion and $2.8 billion at December 31, 2015 and 2014 , 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 proceeds from sales of available-for-sale securities and 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. Year Ended December 31, (In thousands) 2015 2014 2013 Realized gains $ 2,608 $ 382 $ 3,786 Realized losses (1,651 ) (216 ) (6,589 ) Net securities (losses)/gains $ 957 $ 166 $ (2,803 ) Gross Unrealized Losses and Fair Value The following table presents the gross unrealized losses and fair value of securities by length of time that individual securities had been in a continuous loss position by major categories of available-for-sale and held-to-maturity securities. 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 Securities Fair Value Unrealized Losses Securities available-for-sale Debt Securities U.S. government agency debentures $ 2,498 $ (2 ) 1 $ — $ — — $ 2,498 $ (2 ) U.S. treasury notes & bonds 5,000 (1 ) 1 — — — 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 — — — 52,229 (9,481 ) 8 52,229 (9,481 ) Total available-for-sale securities $ 1,849,320 $ (19,569 ) 180 $ 913,649 $ (37,458 ) 91 $ 2,762,969 $ (57,027 ) Securities held-to-maturity Debt Securities U.S. government agency debentures $ — $ — — $ — $ — — $ — $ — 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 — — — 19,243 (22 ) Total held-to-maturity securities $ 370,605 $ (2,916 ) 58 $ 1,171,297 $ (40,433 ) 79 $ 1,541,902 $ (43,349 ) December 31, 2014 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.government agency debentures $ 2,482 $ (18 ) 1 $ — $ — — $ 2,482 $ (18 ) U.S. states and political subdivisions 5,637 (11 ) 11 22,528 (455 ) 36 28,165 (466 ) Residential mortgage-backed securities: U.S. government agencies 50,126 (182 ) 5 199,773 (3,036 ) 14 249,899 (3,218 ) Commercial mortgage-backed securities: U.S. government agencies 12,284 (55 ) 2 45,485 (1,316 ) 6 57,769 (1,371 ) Residential collateralized mortgage-backed securities: U.S. government agencies 243,970 (906 ) 15 905,478 (25,319 ) 64 1,149,448 (26,225 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 31,375 (229 ) 4 67,169 (1,176 ) 7 98,544 (1,405 ) Asset-backed securities: Collateralized loan obligations 79,042 (1,406 ) 15 193,687 (8,207 ) 27 272,729 (9,613 ) Corporate debt securities — — — 51,338 (10,315 ) 8 51,338 (10,315 ) Total available-for-sale securities $ 424,916 $ (2,807 ) 53 $ 1,485,458 $ (49,824 ) 162 $ 1,910,374 $ (52,631 ) Securities held-to-maturity Debt securities: U.S. government agency debentures $ — $ — $ — $ 24,463 $ (537 ) 1 $ 24,463 $ (537 ) U.S. states and political subdivisions 9,085 (17 ) 9 18,371 (174 ) 21 27,456 (191 ) Residential mortgage-backed securities: U.S. government agencies — — 0 185,361 (3,045 ) 10 185,361 (3,045 ) Commercial mortgage-backed securities: U.S. government agencies 9,950 (4 ) 2 16,735 (325 ) 2 26,685 (329 ) Residential collateralized mortgage-backed securities: U.S. government agencies 28,333 (149 ) 3 1,161,297 (38,726 ) 58 1,189,630 (38,875 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 41,474 (55 ) 3 171,570 (6,713 ) 16 213,044 (6,768 ) Corporate debt securities 36,933 (52 ) 13 — — 0 36,933 (52 ) Total held-to-maturity securities $ 125,775 $ (277 ) 30 $ 1,577,797 $ (49,520 ) 108 $ 1,703,572 $ (49,797 ) 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 for which the assessment shows the Corporation will recover the entire cost basis, Management does not intend to sell these securities and it is not more likely than not that the Corporation will be required to sell them before the anticipated recovery of the amortized cost basis, the gross unrealized losses are recognized in OCI, net of tax. The investment securities portfolio was in a net unrealized loss position of $53.0 million at December 31, 2015 , compared to a net unrealized loss position of $44.9 million at December 31, 2014 . Gross unrealized losses were $100.4 million as of December 31, 2015 , compared to $102.4 million at December 31, 2014 . As of December 31, 2015 , gross unrealized losses are concentrated within agency MBS, CLOs, and corporate debt securities. Securities classified as corporate debt securities 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 December 31, 2015 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 CLOs. As of December 31, 2015 , the Corporation holds $289.4 million of CLOs with a gross unrealized loss position of $8.4 million . Management believes that its holdings of CLOs are not ownership interested 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 December 31, 2015 . 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. December 31, 2015 (Dollars in thousands) U.S. Government agency debentures U.S. Treasuries U.S. States and political subdivisions obligations Residential mortgage-backed securities - U.S. govt. agency obligations Commercial mortgage-backed securities - U.S. govt. agency obligations Residential collateralized mortgage obligations - U.S. govt. agency obligations Residential collateralized mortgage obligations - non- U.S. govt. agency issued Commercial collateralized mortgage obligations - U.S. govt. agency obligations Collateralized loan obligations Corporate debt securities Total Weighted Average Yield Securities Available for Sale Remaining maturity: One year or less $ — $ 5,000 $ 8,640 $ — $ — $ — $ — $ — $ — $ — $ 13,640 1.99 % Over one year through five years 2,498 — 78,968 37,010 14,825 10,922 4 46,105 — — 190,332 3.84 % Over five years through ten years — — 83,928 71,478 136,728 23,697 — 67,299 207,480 — 590,610 3.02 % Over ten years — — 21,259 797,741 20,556 2,093,701 — 102,915 81,931 52,229 3,170,332 2.09 % Fair Value $ 2,498 $ 5,000 $ 192,795 $ 906,229 $ 172,109 $ 2,128,320 $ 4 $ 216,319 $ 289,411 $ 52,229 $ 3,964,914 2.31 % Amortized Cost $ 2,500 $ 5,001 $ 188,829 $ 900,358 $ 173,912 $ 2,155,808 $ 4 $ 217,008 $ 297,831 $ 61,710 $ 4,002,961 Weighted-Average Yield 1.25 % 0.28 % 5.19 % 2.39 % 2.03 % 2.04 % 3.07 % 2.11 % 2.77 % 1.24 % 2.31 % Weighted-Average Maturity (in years) 2.42 — 2.17 3.78 4.52 3.89 0.90 4.00 6.51 11.81 4.13 Securities Held to Maturity Remaining maturity: One year or less $ — $ — $ 63,383 $ — $ — $ — $ — $ — $ — $ — $ 63,383 1.99 % Over one year through five years 25,019 — 144,134 — 35,953 — — 79,833 — 88,139 373,078 2.34 % Over five years through ten years — — 216,331 23,421 28,718 — — 41,190 — — 309,660 3.79 % Over ten years — — 169,808 486,255 — 1,125,534 — 131,401 — — 1,912,998 2.12 % Fair Value $ 25,019 $ — $ 593,656 $ 509,676 $ 64,671 $ 1,125,534 $ — $ 252,424 $ — $ 88,139 $ 2,659,119 2.33 % Amortized Cost $ 25,000 $ — $ 571,738 $ 507,908 $ 64,951 $ 1,161,340 $ — $ 255,359 $ — $ 87,797 $ 2,674,093 Weighted-Average Yield 1.43 % — % 4.01 % 2.15 % 2.55 % 1.60 % — % 2.34 % — % 2.28 % 2.33 % Weighted-Average Maturity (in years) 0.08 — 4.83 4.04 2.91 3.76 — 4.04 — 2.02 3.96

Loans

Loans	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Loans	Loans Loans outstanding as of December 31, 2015 and 2014 , net of unearned income, consisted of the following: (In thousands) December 31, 2015 December 31, 2014 Originated loans: Commercial $ 9,007,830 $ 8,200,264 Residential mortgage 689,045 625,283 Installment 2,990,349 2,393,451 Home equity 1,248,438 1,110,336 Credit cards 182,843 164,478 Total originated loans 14,118,505 12,493,812 Allowance for originated loan losses (105,135 ) (95,696 ) Net originated loans $ 14,013,370 $ 12,398,116 Acquired loans: Commercial $ 677,149 $ 1,086,899 Residential mortgage 324,008 394,484 Installment 573,372 764,168 Home equity 168,542 233,629 Total acquired loans 1,743,071 2,479,180 Allowance for acquired loan losses (3,877 ) (7,457 ) Net acquired loans $ 1,739,194 $ 2,471,723 FDIC acquired loans: Commercial 129,109 211,607 Residential mortgage 35,568 41,276 Installment 2,077 4,874 Home equity 38,668 73,365 Loss share receivable 9,947 22,033 Total FDIC acquired loans 215,369 353,155 Allowance for FDIC acquired loan losses (44,679 ) (40,496 ) Net FDIC acquired loans $ 170,690 $ 312,659 Total loans: Commercial $ 9,814,088 $ 9,498,770 Residential mortgage 1,048,621 1,061,043 Installment 3,565,798 3,162,493 Home equity 1,455,648 1,417,330 Credit cards 182,843 164,478 Loss share receivable 9,947 22,033 Total loans 16,076,945 15,326,147 Total allowance for loan losses (153,691 ) (143,649 ) Total Net loans $ 15,923,254 $ 15,182,498 Loan activity with related parties for the years ended December 31, 2015 , 2014 , and 2013 is summarized as follows: Years Ended December 31, (In thousands) 2015 2014 2013 Aggregate amount at beginning of year $ 20,682 $ 24,536 $ 16,578 New loans 5,365 2,534 11,507 Repayments (5,619 ) (6,388 ) (4,374 ) Changes in directors and their affiliations — — 825 Aggregate amount at end of year $ 20,428 $ 20,682 $ 24,536 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 $4.1 million and $5.4 million at December 31, 2015 and 2014 , 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 were $406.0 million and $590.9 million as of December 31, 2015 and 2014 . The outstanding balance of these loans is the undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan terms, 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 years ended December 31, 2015 and 2014 : Years Ended Acquired Impaired Loans December 31, 2015 December 31, 2014 (In thousands) Accretable Yield Carrying Amount of Loans Accretable Yield Carrying Amount of Loans Balance at beginning of period $ 119,450 $ 423,209 $ 136,646 $ 601,000 Accretion (40,756 ) 40,756 (49,271 ) 49,271 Net reclassifications from nonaccretable to accretable 37,245 — 45,824 — Payments received, net — (179,256 ) — (227,062 ) Disposals (26,116 ) — (13,749 ) — Balance at end of period $ 89,823 $ 284,709 $ 119,450 $ 423,209 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 year ended December 31, 2015 , there was an overall improvement in cash flow expectations which resulted in a net reclassification of $37.2 million from the nonaccretable difference to accretable yield. This reclassification was $45.8 million for the year ended December 31, 2014 . 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 $129.1 million of loans no longer being covered as of December 31, 2015 . As of December 31, 2015 , $76.3 million of loans remained covered by single family loss share agreements. Changes in the loss share receivable for the years ended December 31, 2015 and 2014 , respectively, were as follows: Loss Share Receivable Years Ended (In thousands) December 31, 2015 December 31, 2014 Balance at beginning of period $ 22,033 $ 61,827 Amortization (4,141 ) (20,943 ) Increase due to impairment on FDIC acquired loans 6,373 2,920 FDIC reimbursement (13,795 ) (17,837 ) FDIC acquired loans paid in full (523 ) (3,934 ) Balance at end of period (1) $ 9,947 $ 22,033 (1) As of December 31, 2015 , the loss share receivable of $9.9 million was related to single family covered loans. Total outstanding FDIC acquired impaired loans were $323.7 million and $451.2 million as of December 31, 2015 and 2014 , 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 loan terms, 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 years ended December 31, 2015 and 2014 : Years Ended December 31, FDIC Acquired Impaired Loans 2015 2014 (In thousands) Accretable Yield Carrying Loans Accretable Yield Carrying Loans Balance at beginning of period $ 37,511 $ 232,452 $ 67,282 $ 403,692 Accretion (14,947 ) 14,947 (42,161 ) 42,161 Net reclassifications from nonaccretable to accretable 4,818 — 16,841 — Payments received, net — (116,751 ) — (213,401 ) (Disposals)/Additions (4,474 ) — (4,451 ) — Balance at end of period $ 22,908 $ 130,648 $ 37,511 $ 232,452 The cash flows expected to be collected on FDIC acquired impaired loans are estimated quarterly in a similar manner as described above for acquired impaired loans. During the year ended December 31, 2015 , the re-estimation process resulted in a net reclassification of $4.8 million from the nonaccretable difference to accretable yield. This reclassification was $16.8 million for the year ended December 31, 2014 . 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 covered impaired loans are considered to be accruing and performing even though collection of contractual payments may be in doubt because income continues to be accreted on the loan pool as long as expected cash flows are reasonably estimable. When a loan is placed on nonaccrual status, interest deemed uncollectible which had been accrued in prior years is charged against the ALL and interest deemed uncollectible accrued in the current year is reversed against interest income. Interest on mortgage loans is accrued until Management deems it uncollectible based upon the specific identification method. Payments subsequently received on nonaccrual loans are generally applied to principal. A loan is returned to accrual status when principal and interest are no longer past due and collectability is probable. This generally requires timely principal and interest payments for a minimum of six consecutive payment cycles. Loans are generally written off when deemed uncollectible or when they reach a predetermined number of days past due depending upon loan product, terms and other factors. The following tables provide a summary of loans by portfolio type, including the delinquency status of those loans that continue to accrue interest and those loans that are nonaccrual: As of 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 originated loans $ 51,358 $ 7,869 $ 24,293 $ 83,520 $ 14,034,985 $ 14,118,505 $ 8,022 $ 44,105 ≥ 90 Days Acquired Loans Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans 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 acquired loans $ 18,687 $ 4,268 $ 22,752 $ 45,707 $ 1,697,364 $ 1,743,071 $ 3,096 $ 8,245 ≥ 90 Days FDIC Acquired Loans (2) 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 FDIC acquired loans $ 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 December 31, 2014 (In thousands) ≥ 90 Days Originated Loans Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (1) Loans Commercial C&I $ 2,212 $ 1,162 $ 2,670 $ 6,044 $ 5,169,157 $ 5,175,201 $ 1,547 $ 6,114 CRE 2,155 1,460 8,864 12,479 2,104,639 2,117,118 1,696 11,033 Construction — — — — 537,766 537,766 — — Leases — — — — 370,179 370,179 — — Consumer Installment 14,621 3,647 4,716 22,984 2,370,467 2,393,451 3,695 3,268 Home equity lines 1,357 587 1,206 3,150 1,107,186 1,110,336 569 1,654 Credit cards 668 516 860 2,044 162,434 164,478 407 596 Residential mortgages 12,086 2,744 8,013 22,843 602,440 625,283 4,242 11,952 Total $ 33,099 $ 10,116 $ 26,329 $ 69,544 $ 12,424,268 $ 12,493,812 $ 12,156 $ 34,617 ≥ 90 Days Acquired Loans Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans Commercial C&I $ 92 $ 234 $ 4,791 $ 5,117 $ 444,137 $ 449,254 $ — $ 787 CRE 3,479 3,398 23,509 30,386 600,288 630,674 44 4,171 Construction — — 685 685 6,286 6,971 — — Consumer Installment 6,204 2,029 1,861 10,094 754,074 764,168 615 1,218 Home equity lines 2,819 2,123 2,333 7,275 226,354 233,629 1,519 631 Residential mortgages 13,062 1,648 7,089 21,799 372,685 394,484 1,293 1,249 Total $ 25,656 $ 9,432 $ 40,268 $ 75,356 $ 2,403,824 $ 2,479,180 $ 3,471 $ 8,056 FDIC Acquired Loans (2) 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 $ 58 $ — $ 6,041 $ 6,099 $ 42,738 $ 48,837 n/a n/a CRE 234 1,517 47,233 48,984 104,524 153,508 n/a n/a Construction — — 6,064 6,064 3,198 9,262 n/a n/a Consumer Installment 23 — 34 57 4,817 4,874 n/a n/a Home equity lines 1,395 870 3,859 6,124 67,241 73,365 n/a n/a Residential mortgages 6,205 91 3,572 9,868 31,408 41,276 n/a n/a Total $ 7,915 $ 2,478 $ 66,803 $ 77,196 $ 253,926 $ 331,122 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 December 31, 2014 . (2) Excludes loss share receivable of $22.0 million as of December 31, 2014 . (3) Acquired and FDIC acquired impaired loans were not classified as nonperforming assets at December 31, 2014 as the loans are considered to be performing under ASC 310-30. As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cash flows, is being recognized on all acquired and 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 regarding 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 Corporation, 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 Corporation’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 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 December 31, 2014 (In thousands) Originated Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 52,676 $ 683 $ 678 $ 4,451 $ 58,488 Grade 2 186,278 3,454 — 14,959 204,691 Grade 3 1,340,100 294,281 46,074 71,908 1,752,363 Grade 4 3,413,446 1,745,470 490,757 277,277 5,926,950 Grade 5 139,083 29,990 257 1,389 170,719 Grade 6 43,618 43,240 — 195 87,053 Grade 7 — — — — — Total $ 5,175,201 $ 2,117,118 $ 537,766 $ 370,179 $ 8,200,264 Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 1,076 $ — $ — $ — $ 1,076 Grade 2 — — — — — Grade 3 20,891 24,867 — — 45,758 Grade 4 376,129 532,447 6,286 — 914,862 Grade 5 23,268 28,382 685 — 52,335 Grade 6 27,890 44,978 — — 72,868 Grade 7 — — — — — Total $ 449,254 $ 630,674 $ 6,971 $ — $ 1,086,899 FDIC Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ — $ — $ — $ — $ — Grade 2 1,347 — — — 1,347 Grade 3 — — — — — Grade 4 36,406 86,779 823 — 124,008 Grade 5 167 3,401 — — 3,568 Grade 6 10,917 63,328 8,248 — 82,493 Grade 7 — — 191 — 191 Total $ 48,837 $ 153,508 $ 9,262 $ — $ 211,607

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses	12 Months Ended
	Dec. 31, 2015
Receivables [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 years ended December 31, 2015 , 2014 and 2013 , as well as the corresponding recorded investment in originated loans at the end of the period: As of December 31, 2015 (In thousands) Originated Loans C&I CRE Construction Leases Installment Home Equity Lines Credit Cards Residential Mortgages Total Year 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 (14,913 ) (625 ) — (1,268 ) (21,630 ) (4,032 ) (4,867 ) (1,443 ) (48,778 ) Recoveries 1,196 517 178 787 11,547 2,606 1,395 257 18,483 Provision for loan losses 21,102 (753 ) (786 ) 1,120 11,348 2,196 4,337 1,170 39,734 Allowance for originated loan losses, ending balance $ 44,760 $ 9,631 $ 1,594 $ 1,313 $ 14,183 $ 20,094 $ 8,831 $ 4,729 $ 105,135 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: Originated loans individually evaluated for impairment $ 43,818 $ 16,614 $ — $ — $ 36,904 $ 7,080 $ 717 $ 23,905 $ 129,038 Originated 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 originated loans $ 5,793,408 $ 2,077,344 $ 645,337 $ 491,741 $ 2,990,349 $ 1,248,438 $ 182,843 $ 689,045 $ 14,118,505 As of December 31, 2014 (In thousands) Originated Loans C&I CRE Construction Leases Installment Home Equity Lines Credit Cards Residential Mortgages Total Year ended Allowance for originated loan losses, beginning balance $ 42,981 $ 12,265 $ 2,810 $ 1,081 $ 11,935 $ 12,900 $ 7,740 $ 4,772 $ 96,484 Charge-offs (9,617 ) (3,512 ) — — (20,328 ) (4,831 ) (4,604 ) (2,031 ) (44,923 ) Recoveries 3,872 515 39 379 11,185 2,940 1,716 318 20,964 Provision for loan losses 139 1,224 (647 ) (786 ) 10,126 8,315 3,114 1,686 23,171 Allowance for originated loan losses, ending balance $ 37,375 $ 10,492 $ 2,202 $ 674 $ 12,918 $ 19,324 $ 7,966 $ 4,745 $ 95,696 Ending allowance for originated loan losses balance attributable to loans: Individually evaluated for impairment $ 72 $ 2,914 $ — $ — $ 1,178 $ 207 $ 296 $ 1,283 $ 5,950 Collectively evaluated for impairment 37,303 7,578 2,202 674 11,740 19,117 7,670 3,462 89,746 Total ending allowance for originated loan losses balance $ 37,375 $ 10,492 $ 2,202 $ 674 $ 12,918 $ 19,324 $ 7,966 $ 4,745 $ 95,696 Originated loans: Originated loans individually evaluated for impairment $ 11,759 $ 23,300 $ — $ — $ 24,905 $ 7,379 $ 854 $ 25,251 $ 93,448 Originated loans collectively evaluated for impairment 5,163,442 2,093,818 537,766 370,179 2,368,546 1,102,957 163,624 600,032 12,400,364 Total ending originated loan balance $ 5,175,201 $ 2,117,118 $ 537,766 $ 370,179 $ 2,393,451 $ 1,110,336 $ 164,478 $ 625,283 $ 12,493,812 As of December 31, 2013 (In thousands) Originated Loans C&I CRE Construction Leases Installment Home Equity Lines Credit Cards Residential Mortgages Total Year ended Allowance for originated loan losses, beginning balance $ 36,209 $ 20,126 $ 3,821 $ 639 $ 11,154 $ 13,724 $ 7,384 $ 5,885 $ 98,942 Charge-offs (5,840 ) (1,281 ) (516 ) (1,237 ) (16,683 ) (7,172 ) (5,541 ) (1,903 ) (40,173 ) Recoveries 7,981 524 507 100 10,519 2,979 1,841 230 24,681 Provision for loan losses 4,631 (7,104 ) (1,002 ) 1,579 6,945 3,369 4,056 560 13,034 Allowance for originated loan losses, ending balance $ 42,981 $ 12,265 $ 2,810 $ 1,081 $ 11,935 $ 12,900 $ 7,740 $ 4,772 $ 96,484 Ending allowance for originated loan losses balance attributable to loans: Individually evaluated for impairment $ 3,235 $ 229 $ — $ — $ 1,014 $ 223 $ 312 $ 1,133 $ 6,146 Collectively evaluated for impairment 39,746 12,036 2,810 1,081 10,921 12,677 7,428 3,639 90,338 Total ending allowance for originated loan losses balance $ 42,981 $ 12,265 $ 2,810 $ 1,081 $ 11,935 $ 12,900 $ 7,740 $ 4,772 $ 96,484 Originated loans: Originated loans individually evaluated for impairment $ 8,053 $ 20,616 $ 906 $ — $ 27,285 $ 6,726 $ 1,112 $ 23,066 $ 87,764 Originated loans collectively evaluated for impairment 4,131,514 2,149,171 338,019 239,551 1,700,640 913,340 147,201 506,187 10,125,623 Total ending originated loan balance $ 4,139,567 $ 2,169,787 $ 338,925 $ 239,551 $ 1,727,925 $ 920,066 $ 148,313 $ 529,253 $ 10,213,387 Allowance for Acquired Loan Losses 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 December 31, 2015 and 2014 , the computed ALL was less than the remaining fair value discount; therefore, no allowance for acquired nonimpaired loan losses 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 years ended December 31, 2015 and 2014 , provision for loan losses, equal to net charge-offs, of $6.5 million and $14.7 million , respectively, was 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 years ended December 31, 2015 , 2014 and 2013 : Allowance for Acquired Impaired Loan Losses Years Ended December 31, (In thousands) 2015 2014 2013 Balance at beginning of the period $ 7,457 $ 741 $ — Charge-offs — — — Recoveries — — — Provision/(recapture) for loan losses (3,580 ) 6,716 741 Balance at end of the period $ 3,877 $ 7,457 $ 741 Allowance for FDIC Acquired Loan Losses The ALL for FDIC acquired nonimpaired loans is estimated similar to acquired loans as described above except any increase to the allowance and provision for loan losses is partially offset by an increase in the loss share receivable for the portion of the losses recoverable under the loss sharing agreements with the FDIC. As of December 31, 2015 and 2014 , 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 years ended December 31, 2015 , 2014 , and 2013 : Allowance for FDIC Acquired Impaired Loan Losses Years Ended December 31, (In thousands) 2015 2014 2013 Balance at beginning of the period $ 40,496 $ 44,027 $ 43,255 Net provision/(recapture) for loan losses before benefit attributable to FDIC loss share agreements 8,830 10,568 23,892 Net (benefit)/recapture attributable to FDIC loss share agreements (6,373 ) (2,920 ) (10,790 ) Net provision/(recapture) for loan losses 2,457 7,648 13,102 Increase/(decrease) in loss share receivable 6,373 2,920 10,790 Loans charged-off (4,647 ) (14,099 ) (23,120 ) Balance at end of the period $ 44,679 $ 40,496 $ 44,027 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 $0.6 million , $0.9 million , and $1.3 million during the years ended 2015 , 2014 , and 2013 , respectively. Interest income which would have been earned in accordance with the original terms was $3.2 million , $2.8 million , and $5.5 million during the years ended December 31, 2015 , 2014 , and 2013 , respectively. Loan impairment is measured based on either the present value of expected future cash flows discounted at the loan’s effective interest rate, at the observable market price of the loan, or the fair value of the collateral for certain collateral dependent loans. Impaired loans include all nonaccrual commercial, agricultural, construction, and commercial real estate loans, and loans modified as a TDR, regardless of nonperforming status. Acquired and FDIC acquired impaired loans are not considered or reported as impaired loans. Nonimpaired acquired loans that are subsequently placed on nonaccrual status and individually evaluated 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 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 December 31, 2014 Originated Loans Unpaid Average Recorded Principal Related Recorded (In thousands) Investment Balance Allowance Investment Impaired loans with no related allowance Commercial C&I $ 11,451 $ 18,207 $ — $ 14,193 CRE 16,874 22,696 — 18,027 Construction — — — — Consumer Installment 4,460 4,584 — 4,272 Home equity line 1,723 1,754 — 1,792 Credit card 16 16 — 32 Residential mortgages 12,204 15,119 — 12,425 Subtotal 46,728 62,376 — 50,741 Impaired loans with a related allowance Commercial C&I 308 344 72 326 CRE 6,426 6,440 2,914 4,497 Construction — — — — Consumer Installment 20,445 21,024 1,178 19,513 Home equity line 5,656 5,875 207 5,944 Credit card 838 838 296 966 Residential mortgages 13,047 13,158 1,283 13,121 Subtotal 46,720 47,679 5,950 44,367 Total impaired loans $ 93,448 $ 110,055 $ 5,950 $ 95,108 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 or reported as 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 December 31, 2015 , and 2014 . 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 Construction — — — 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 December 31, 2014 (Dollars in thousands) Number of Loans Recorded Investment Unpaid Principal Balance Originated loans Commercial C&I 41 $ 7,123 $ 13,887 CRE 67 17,607 22,645 Construction 31 — — Total originated commercial 139 24,730 36,532 Consumer Installment 1,205 24,905 25,608 Home equity lines 270 7,379 7,629 Credit card 238 854 854 Residential mortgages 315 25,251 28,277 Total originated consumer 2,028 58,389 62,368 Total originated loans 2,167 $ 83,119 $ 98,900 Acquired Loans Commercial C&I 2 $ 18 $ 19 CRE 3 2,542 2,595 Total acquired commercial 5 2,560 2,614 Consumer Installment 40 975 1,054 Home equity lines 145 6,932 6,983 Residential mortgages 26 1,633 1,823 Total acquired consumer 211 9,540 9,860 Total acquired loans 216 $ 12,100 $ 12,474 FDIC acquired loans Commercial C&I 8 $ 177 $ 1,589 CRE 24 25,499 42,226 Construction 9 339 9,552 Total FDIC acquired commercial 41 26,015 53,367 Consumer Home equity lines 68 8,890 8,901 Residential Mortgages 2 334 334 Total FDIC acquired consumer 70 9,224 9,235 Total FDIC acquired loans 111 $ 35,239 $ 62,602 Total loans Commercial C&I 51 $ 7,318 $ 15,495 CRE 94 45,648 67,466 Construction 40 339 9,552 Total commercial 185 53,305 92,513 Consumer Installment 1,245 25,880 26,662 Home equity lines 483 23,201 23,513 Credit card 238 854 854 Residential mortgages 343 27,218 30,434 Total consumer 2,309 77,153 81,463 Total loans 2,494 $ 130,458 $ 173,976 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 years ended December 31, 2015 , 2014 and 2013 were not materially different. Post-modification balances may include capitalization of unpaid accrued interest and fees associated with the modification as well as forgiveness of principal. Loans modified as TDRs during the years ended December 31, 2015 , 2014 and 2013 did not involve the forgiveness of principal, accordingly, the Corporation did not record a charge-off at the modification date. Additionally, capitalization of any unpaid accrued interest and fees assessed to loans modified in the years ended December 31, 2015 , 2014 and 2013 were not material to the accompanying consolidated financial statements. Specific allowances for loan losses are established for loans whose terms have been modified in a TDR. Specific reserve allocations are generally assessed prior to loans being modified in a TDR, as most of these loans migrate from the Corporation’s internal watch list and have been specifically allocated for as part of the Corporation’s normal loan loss provisioning methodology. At December 31, 2015 and 2014 , the Corporation had $7.0 million and $0.2 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 December 31, 2015 and 2014 , including TDRs that continue to accrue interest and TDRs included in nonperforming assets. 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 Construction — — — — — — — — 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 December 31, 2014 Accruing TDRs Nonaccruing TDRs Total Total (In thousands) Current Delinquent Total Current Delinquent Total TDRs Allowance Originated loans Commercial C&I $ 6,740 $ — $ 6,740 $ — $ 383 $ 383 $ 7,123 $ 72 CRE 12,885 952 13,837 394 3,376 3,770 17,607 159 Construction — — — — — — — — Total originated commercial 19,625 952 20,577 394 3,759 4,153 24,730 231 Consumer Installment 22,254 726 22,980 1,663 262 1,925 24,905 1,178 Home equity lines 6,239 269 6,508 871 — 871 7,379 207 Credit card 775 60 835 15 4 19 854 296 Residential mortgages 13,440 3,538 16,978 5,006 3,267 8,273 25,251 1,283 Total originated consumer 42,708 4,593 47,301 7,555 3,533 11,088 58,389 2,964 Total originated TDRs $ 62,333 $ 5,545 $ 67,878 $ 7,949 $ 7,292 $ 15,241 $ 83,119 $ 3,195 Acquired loans Commercial C&I $ 15 $ — $ 15 $ 3 $ — $ 3 $ 18 $ 18 CRE — — — 978 1,564 2,542 2,542 134 Total acquired commercial 15 — 15 981 1,564 2,545 2,560 152 Consumer Installment 841 87 928 24 23 47 975 65 Home equity lines 6,186 607 6,793 139 — 139 6,932 9 Residential mortgages 868 — 868 470 295 765 1,633 2 Total acquired consumer 7,895 694 8,589 633 318 951 9,540 76 Total acquired TDRs $ 7,910 $ 694 $ 8,604 $ 1,614 $ 1,882 $ 3,496 $ 12,100 $ 228 FDIC acquired loans Commercial C&I $ — $ 177 $ 177 $ — $ — $ — $ 177 $ — CRE 5,123 20,376 25,499 — — — 25,499 2,879 Construction 339 — 339 — — — 339 295 Total FDIC acquired commercial 5,462 20,553 26,015 — — — 26,015 3,174 Consumer Home equity lines 8,561 — 8,561 329 — 329 8,890 27 Residential mortgages 334 — 334 — — — 334 21 Total FDIC acquired consumer 8,895 — 8,895 329 — 329 9,224 48 Total FDIC acquired TDRs $ 14,357 $ 20,553 $ 34,910 $ 329 $ — $ 329 $ 35,239 $ 3,222 Total loans Commercial C&I $ 6,755 $ 177 $ 6,932 $ 3 $ 383 $ 386 $ 7,318 $ 90 CRE 18,008 21,328 39,336 1,372 4,940 6,312 45,648 3,172 Construction 339 — 339 — — — 339 295 Total commercial 25,102 21,505 46,607 1,375 5,323 6,698 53,305 3,557 Consumer Installment 23,095 813 23,908 1,687 285 1,972 25,880 1,243 Home equity lines 20,986 876 21,862 1,339 — 1,339 23,201 243 Credit card 775 60 835 15 4 19 854 296 Residential mortgages 14,642 3,538 18,180 5,476 3,562 9,038 27,218 1,306 Total consumer 59,498 5,287 64,785 8,517 3,851 12,368 77,153 3,088 Total TDRs $ 84,600 $ 26,792 $ 111,392 $ 9,892 $ 9,174 $ 19,066 $ 130,458 $ 6,645 Loans modified in a TDR are closely monitored for delinquency as an early indicator of possible future default. If loans modified in a TDR subsequently default, the Corporation evaluates the loan for possible further impairment. The ALL may be increased, adjustments may be made in the allocation of the ALL, or partial charge-offs may be taken to further write-down the carrying value of the loan. On an ongoing basis, the Corporation monitors the performance of modified loans to their restructured terms. In the event of a subsequent default, the ALL continues to be reassessed on the basis of an individual evaluation of the loan. The following table provides the number of loans modified in a TDR during the previous 12 months that subsequently defaulted during the years ended December 31, 2015 and 2014 , as well as the amount defaulted in these restructured loans as of December 31, 2015 and 2014 . As of December 31, 2015 (Dollars in thousands) Number of Loans Amount Defaulted Originated loans Commercial C&I — $ — CRE — — Construction — — Total originated commercial — — Consumer Installment 8 113 Home equity lines — — Credit card 10 51 Residential mortgages — — Total originated consumer 18 $ 164 FDIC acquired loans Commercial C&I — $ — CRE — — Construction — — Total FDIC acquired commercial — $ — Acquired loans Consumer Installment 2 $ 61 Home equity lines 1 105 Residential mortgages — — Total acquired consumer 3 $ 166 Total loans Commercial C&I — $ — CRE — — Construction — — Total commercial — — Consumer Installment 10 174 Home equity lines 2 348 Credit card 10 51 Residential mortgages — — Total consumer 22 573 Total 22 $ 573 As of December 31, 2014 (Dollars in thousands) Number of Loans Amount Defaulted Originated loans Commercial C&I 3 $ 4,930 CRE 1 363 Construction — — Total originated commercial 4 5,293 Consumer Installment 11 40 Home equity lines 1 29 Credit card 28 140 Residential mortgages 3 183 Total originated consumer 43 $ 392 FDIC acquired loans Commercial C&I 1 $ 427 CRE — — Construction — — Total FDIC acquired commercial 1 $ 427 Acquired loans Consumer Installment 2 165 Home equity lines 1 61 Residential mortgages — — Total acquired consumer 3 $ 226 Total loans Commercial C&I 4 $ 5,357 CRE 1 363 Construction — — Total commercial 5 5,720 Consumer Installment 13 205 Home equity lines 2 90 Credit card 28 140 Residential mortgages 3 183 Total consumer 46 618 Total 51 $ 6,338

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill Goodwill totaled $741.7 million as of December 31, 2015 and 2014 . The following table shows goodwill allocated by business segment. (In thousands) Commercial Retail Wealth Total Balance at December 31, 2014 $ 527,406 $ 193,961 $ 20,373 $ 741,740 Balance at December 31, 2015 $ 527,406 $ 193,961 $ 20,373 $ 741,740 The Corporation performed its annual impairment test of goodwill as of November 30, 2015 and determined that no impairment of goodwill had been incurred. Key changes in the market and our operations were monitored from our impairment test date of November 30 to year end in order to identify circumstances necessitating further testing of impairment. No such changes were noted for 2015 . It is possible that a future conclusion could be reached that all or a portion of the Corporation’s goodwill may be impaired, in which case a noncash charge for the amount of such impairment would be recorded in earnings. 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. 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 Total intangibles $ 96,561 $ (35,933 ) $ 60,628 December 31, 2014 Gross Carrying Accumulated Net Carrying (In thousands) Amount Amortization Amount Core deposit intangibles (1) $ 82,323 $ (19,996 ) $ 62,327 Lease intangible 238 (176 ) 62 Trust relationships (2) 14,000 (5,369 ) 8,631 Total intangibles $ 96,561 $ (25,541 ) $ 71,020 (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 $10.4 million in 2015 , $11.7 million in 2014 , and $8.4 million in 2013 . The following table shows the estimated future amortization expense for intangible assets subject to amortization as of December 31, 2015 . (In thousands) For the years ended: December 31, 2016 $ 9,209 December 31, 2017 8,161 December 31, 2018 7,273 December 31, 2019 6,500 December 31, 2020 5,214 Total estimated future amortization $ 36,357

Mortgage Servicing Rights and M

Mortgage Servicing Rights and Mortgage Servicing Activity	12 Months Ended
	Dec. 31, 2015
Transfers and Servicing [Abstract]
Mortgage Servicing Rights and Mortgage Servicing Activity	Mortgage Servicing Rights and Mortgage Servicing Activity In the years ended December 31, 2015 and 2014 , the Corporation sold residential mortgage loans from the held for sale portfolio with unpaid principal balances of $76.7 million and $356.5 million , respectively, and recognized pretax gains of $1.2 million and $7.2 million , respectively, which are included as a component of loan sales and servicing income. As of December 31, 2015 and 2014 , the Corporation retained the related MSRs, for which it receives servicing fees, on $60.3 million and $314.4 million , respectively, of the loans sold. The Corporation serviced for third parties approximately $2.4 billion of residential mortgage loans at December 31, 2015 , and $2.6 billion at December 31, 2014 . Loan servicing fees, not including valuation changes on MSRs included in loan sales and servicing income, were $6.3 million , $6.6 million , and $6.4 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Servicing rights are presented within other assets on the accompanying Consolidated Balance Sheet. 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 mortgage servicing rights. Additional information can be found in Note 17 ( 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 the related amortization is recorded in loan sales and servicing income. Changes in the carrying amount of MSRs and the MSR valuation allowance are as follows: Year Ended December 31, (In thousands) 2015 2014 2013 Balance at beginning of period $ 22,011 $ 22,760 $ 21,316 Addition of Citizens’ MSRs on Acquisition Date — — 1,065 Additions 619 3,049 4,952 Amortization (3,693 ) (3,798 ) (4,573 ) Balance at end of period 18,937 22,011 22,760 Valuation allowance at beginning of period (955 ) (282 ) (2,564 ) Recoveries (Additions) 556 (673 ) 2,282 Valuation Allowance at end of period (399 ) (955 ) (282 ) MSRs, net carrying balance $ 18,538 $ 21,056 $ 22,478 Fair value at end of period $ 19,149 $ 21,228 $ 23,041 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 years ended December 31, 2015 , 2014 , and 2013 . Key economic assumptions and the sensitivity of the current fair value of the MSRS related to immediate 10% and 25% adverse changes in those assumptions at December 31, 2015 , 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) 10.93 % Decrease in fair value from 10% adverse change $ 1,032 Decrease in fair value from 25% adverse change $ 1,292 Discount rate assumption 9.39 % Decrease in fair value from 100 basis point adverse change $ 599 Decrease in fair value from 200 basis point adverse change $ 1,155 Expected weighted-average life (in months) 97.6 The following table shows the estimated future amortization for net MSRs as of December 31, 2015 : (In thousands) Year Ended December 31, 2016 $ 3,075 2017 2,723 2018 2,281 2019 1,917 2020 1,608 more than 5 years 6,934 Total estimated future amortization $ 18,538

Restrictions on Cash and Divide

Restrictions on Cash and Dividends	12 Months Ended
	Dec. 31, 2015
Restrictions on Cash and Dividends [Abstract]
Restrictions on Cash and Dividends	Restrictions on Cash and Dividends The average balance on deposit with the FRB or other governing bodies to satisfy reserve requirements amounted to $15.3 million and $5.9 million during 2015 and 2014 , respectively. The level of this balance is based upon amounts and types of customers’ deposits held by the banking subsidiary of the Corporation. In addition, deposits are maintained with other banks at levels determined by Management based upon the volumes of activity and prevailing interest rates to compensate for check-clearing, safekeeping, collection and other bank services performed by these banks. At December 31, 2015 , cash and due from banks included $0.3 million deposited with other banks for these reasons. Dividends paid by the subsidiaries are the principal source of funds to enable the payment of dividends by the Corporation to its shareholders. These payments by the subsidiaries in 2015 were restricted, by the regulatory agencies, principally to the total of 2015 net income plus undistributed net income of the previous two calendar years. Regulatory approval must be obtained for the payment of dividends of any greater amount.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment The components of premises and equipment are as follows: As of December 31, Estimated (In thousands) 2015 2014 useful lives Land $ 57,040 $ 60,397 - Buildings 309,754 308,144 10-35 yrs Equipment 182,385 176,906 3-15 yrs Leasehold improvements 24,765 25,151 1-20 yrs Software 116,280 103,782 3-7 yrs 690,224 674,380 Less accumulated depreciation and amortization 370,736 342,083 Total premises and equipment $ 319,488 $ 332,297 Amounts included in noninterest expense in the accompanying Consolidated Statement of Income for depreciation and amortization aggregated $40.7 million , $37.6 million , and $32.2 million for the years ended 2015 , 2014 , and 2013 , respectively.

Certificates and Other Time Dep

Certificates and Other Time Deposits	12 Months Ended
	Dec. 31, 2015
Time Deposits [Abstract]
Certificates and Other Time Deposits	Certificates and Other Time Deposits The aggregate amounts of certificates and other time deposits of $100 thousand and over at December 31, 2015 , 2014 , and 2013 , were $794.8 million , $716.5 million , and $882.4 million , respectively. Interest expense on these certificates and time deposits amounted to $3.1 million , $3.8 million , and $4.5 million in 2015 , 2014 , and 2013 , respectively. Maturities of certificates and other time deposits as of December 31, 2015 are as follows: (In thousands) For the year ended December 31, 2016 $ 1,525,838 2017 407,919 2018 124,610 2019 103,921 2020 73,131 2021 and after 3,484 Total certificates and other time deposits $ 2,238,903

Federal Funds Purchased and Sec

Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	12 Months Ended
	Dec. 31, 2015
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Federal Funds Purchased And Securities Sold Under Agreements to Repurchase	Federal Funds Purchased and Securities Sold under Agreements to Repurchase The following table presents federal funds purchased and securities sold under agreements to repurchase as of December 31, 2015 and 2014 . As of December 31, (In thousands) 2015 2014 Federal funds purchased and securities sold under agreements to repurchase $ 1,037,075 $ 1,272,591 Securities sold under agreements to repurchase are secured by securities with a carrying value of $813.3 million and $888.4 million at December 31, 2015 and 2014 , respectively. Securities sold under agreements to repurchase have an overnight maturity at December 31, 2015 . Selected financial statement information pertaining to the securities sold under agreements to repurchase is as follows: As of December 31, (Dollars in thousands) 2015 2014 2013 Average balance during the year $ 1,138,307 $ 1,084,532 $ 949,068 Weighted-average annual interest rate during the year 0.10 % 0.09 % 0.13 % Maximum month-end balance $ 1,519,250 $ 1,289,460 $ 1,123,795

Borrowed Funds

Borrowed Funds	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Borrowed Funds	Borrowed Funds The following table presents wholesale borrowings and long-term debt as of December 31, 2015 and 2014 . As of December 31, (In thousands) 2015 2014 FHLB advances $ 580,501 $ 427,857 Subordinated debentures 505,173 505,192 Other 147 214 Total borrowed funds $ 1,085,821 $ 933,263 FHLB advances were secured by a lien on residential and other real estate-related loans totaling $5.1 billion at December 31, 2015 , and $5.1 billion at December 31, 2014 . The FHLB advances have interest rates that range from 0.34% to 4.12% as of December 31, 2015 . On November 25, 2014 , the Bank issued $250 million in aggregate principal of subordinated notes, due November 25, 2026 , and bearing interest at an annual rate of 4.27% payable semi-annually in arrears on May 25 and November 25 of each year. The net proceeds were used to initially pay down existing federal funds purchased and securities sold under repurchase agreements, general corporate purposes, and as capital to support the Bank’s growth. The subordinated notes are not redeemable by the Bank or callable by the holders prior to maturity. As part of the merger with Citizens, the Corporation assumed two active wholly owned trusts formed for the purpose of issuing securities. Each of the two active trusts had issued separate offerings of trust preferred securities to investors in 2006 and 2003. In accordance with GAAP, the financial statements of the Trusts were not included in the Corporation's consolidated financial statements. In conjunction with these trusts, the Corporation assumed a variable rate junior subordinated deferrable debenture in an aggregate principal amount approximating $25.8 million . This debenture bore interest at an annual rate equal to three-month LIBOR plus 3.10% , payable quarterly. Interest was adjusted on a quarterly basis not exceeding 11.75% . The Corporation assumed a 7.50% junior subordinated debenture in an aggregate principal amount approximating $48.7 million . These trust preferred securities and the junior subordinated debentures, totaling $74.5 million , were redeemed on September 26, 2014 and the associated debentures were paid off. Selected financial statement information pertaining to the Corporation’s borrowed funds is as follows: As of December 31, (Dollars in thousands) 2015 2014 2013 Average balance during the year $ 885,478 $ 715,383 $ 474,473 Weighted-average annual interest rate during the year 2.35 % 2.80 % 3.62 % Maximum month-end balance $ 1,189,093 $ 973,453 $ 527,155 The following table illustrates the contractual maturities of the Corporation's borrowed funds at December 31, 2015 : One Year One to Three to Over Five (In thousands) or Less Three Years Five Years Years Total FHLB advances $ 310,716 $ 230,193 $ — $ 39,592 $ 580,501 Subordinated debentures — — — 505,173 505,173 Other 71 76 — — 147 Total borrowed funds $ 310,787 $ 230,269 $ — $ 544,765 $ 1,085,821

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense is comprised of the following: Year Ended December 31, (In thousands) 2015 2014 2013 Taxes currently payable Federal $ 52,869 $ 52,514 $ 24,426 State (3,119 ) 4,763 3,496 Deferred expense 47,269 44,666 51,585 Total income tax expense $ 97,019 $ 101,943 $ 79,507 The actual income tax rate differs from the statutory tax rate as shown in the following table: Year Ended December 31, 2015 2014 2013 Statutory rate 35.00 % 35.00 % 35.00 % Increase (decrease) in rate due to: Interest on tax-exempt securities and tax-free loans, net (2.75 ) (2.77 ) (3.16 ) Merger expenses at acquisition — — 0.54 Reduction in excess tax reserves — — 0.11 Bank owned life insurance (1.76 ) (2.10 ) (2.53 ) State income tax (net) 0.59 0.91 0.87 Tax credits (0.82 ) (0.96 ) (1.06 ) ESOP Dividends (0.14 ) (0.13 ) (0.14 ) Nondeductible meals and entertainment 0.25 0.22 0.27 Other (0.66 ) (0.18 ) 0.31 Effective tax rates 29.71 % 29.99 % 30.21 % Income tax expense as reflected in the previous table excludes net worth-based taxes, which are assessed on financial institutions in lieu of income tax in Ohio, Pennsylvania and Michigan. These taxes are $8.1 million , $8.2 million , and $9.9 million in 2015 , 2014 , and 2013 , respectively, and are recorded in other operating expense in the accompanying Consolidated Statement of Income. Principal components of the Corporation’s net deferred tax asset are summarized as follows: Year Ended December 31, (In thousands) 2015 2014 Deferred tax assets: Allowance for credit losses $ 40,069 $ 35,760 Employee benefits 50,868 51,584 Real Estate Mortgage Investment Credit 3,791 4,831 Acquired liabilities 5,931 6,296 Acquired loans 25,388 51,701 Available for sale securities 11,475 3,862 Loan fees and expenses — — Federal NOL carryforwards 102,194 131,195 Alternative minimum tax credit carryforward 112,861 83,428 General business tax credit carryforward 2,924 1,982 State income tax (net of federal benefit) 2,441 1,970 Other 1,789 467 Total deferred tax assets 359,731 373,076 Deferred tax liabilities: Leased assets and depreciation (41,649 ) (24,699 ) FHLB stock (18,641 ) (18,165 ) Loan fees and expenses (1,480 ) (2,537 ) Goodwill (26,885 ) (16,580 ) Core deposit intangibles (18,697 ) (22,013 ) Other — — Total deferred tax liabilities (107,352 ) (83,994 ) Total net deferred tax asset $ 252,379 $ 289,082 At December 31, 2015 and 2014 , there was no valuation allowance for deferred tax assets. At December 31, 2015 , the Corporation had gross federal loss carryforwards of $292.0 million that expire in 2028 through 2032 , general business credits of $2.9 million that expire in 2028 , and $112.9 million of federal alternative minimum tax credits with an indefinite life. In addition, future state income taxes are expected to be reduced by $450.0 thousand resulting from state non-operating losses at various levels in various states. This benefit is expected to be fully used during the expiration period of 2015 through 2027 . The period change in deferred taxes recorded both directly to shareholders’ equity and as a part of the income tax expense is summarized as follows: Year Ended December 31, (In thousands) 2015 2014 Deferred tax changes reflected in other comprehensive income $ (10,565 ) $ (2,698 ) Deferred tax changes reflected in Federal income tax expense 47,269 44,666 Net decrease/(increase) in DTA $ 36,704 $ 41,968 Income tax benefits are recognized in the financial statements for a tax position only if it is considered “more likely than not” of being sustained on audit based solely on the technical merits of the income tax position. If the recognition criteria are met, the amount of income tax benefits to be recognized is measured based on the largest income tax benefit that is more than 50 percent likely to be realized on ultimate resolution of the tax position. A reconciliation of the change in the reserve for uncertain tax positions for 2015 and 2014 is as follows: (In thousands) Federal and State Tax Accrued Penalties Gross Unrecognized Income Tax Benefits Balance as of January 1, 2015 $ 305 $ 19 $ 324 Additions for tax provisions related to prior year 299 17 316 Reduction for tax positions related to prior year due closed tax years — — — Reduction for tax positions related to prior tax years (134 ) — (134 ) Balance at December 31, 2015 $ 470 $ 36 $ 506 Components of Reserve: State income tax exposure $ 470 $ 36 $ 506 Balance at December 31, 2015 $ 470 $ 36 $ 506 (In thousands) Federal and State Tax Accrued Penalties Gross Unrecognized Income Tax Benefits Balance as of January 1, 2014 $ 1,003 $ 262 $ 1,265 Additions for tax provisions related to prior year 798 14 812 Reduction for tax positions related to prior year due closed tax years (31 ) (3 ) (34 ) Reduction for tax positions related to prior tax years (1,465 ) (254 ) (1,719 ) Balance at December 31, 2014 $ 305 $ 19 $ 324 Components of Reserve: State income tax exposure $ 305 $ 19 $ 324 Balance at December 31, 2014 $ 305 $ 19 $ 324 The Corporation recognized accrued interest and penalties, as appropriate, related to UTBs, in the effective tax rate. The balance of accrued interest and penalties at the reporting periods is presented in the table above. The reserve of uncertain tax positions is recorded in accrued taxes, expenses and other liabilities on the Consolidated Balance Sheet. The Corporation is routinely examined by various taxing authorities. With few exceptions, the Corporation is no longer subject to federal, state and local tax examinations by tax authorities for years before 2012 . The expiration of statutes of limitation for various jurisdictions is expected to reduce the UTB balance by approximately $50 thousand within the next twelve months. Management anticipates that the UTB balance will increase by $0.2 million as a result of the 2015 tax filings in the next twelve months. If the total amount of UTBs were recognized the effective tax rate would decrease by 0.15 to 29.71% at December 31, 2015 . Management monitors changes in tax statutes and regulations and the issuance of judicial decisions to determine the potential impact to uncertain income tax positions. As of December 31, 2015 , Management had identified no other potential U.S. Treasury regulations or legislative initiatives that could have a significant impact on the UTB balance within the next twelve months.

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Benefit Plans	Benefit Plans Pension plans . The Corporation had a noncontributory qualified defined benefit pension plan that covered all eligible legacy FirstMerit employees vested in the pension plan as of December 31, 2006 (“FirstMerit Pension Plan”). The FirstMerit Pension Plan was frozen for nonvested employees and closed to new entrants after December 31, 2006. Effective December 31, 2012, the FirstMerit Pension Plan was frozen for vested employees resulting in no benefits accruing after December 31, 2012. Employees will have an accrued benefit which will be paid upon retirement. Certain former Citizens’ employees were covered by a cash balance defined benefit pension plan after the Acquisition Date through December 31, 2013 (“Citizens Pension Plan”). Effective December 31, 2006, the Citizens Pension Plan was frozen, preserving prior earned benefits but discontinuing the accrual of future benefits. As of December 31, 2013, the Corporation adopted one noncontributory qualified defined pension plan covering all eligible FirstMerit and former Citizens employees, with the FirstMerit Pension Plan being the surviving plan. The Citizens Pension Plan ceased to exist after December 31, 2013. The plan assets of the FirstMerit Pension Plan and the Citizens Pension Plan were combined and invested in a single trust as of December 31, 2013. Benefits remain frozen in the combined plan with the unique benefit structure under each of the FirstMerit and Citizens Pension Plans retained in the combined plan. A supplemental nonqualified, nonfunded pension plan for certain officers is also maintained and is being provided for by charges to earnings sufficient to meet the projected benefit obligation. The pension cost for this plan is based on substantially the same actuarial methods and economic assumptions as those used for the FirstMerit Pension Plan. On December 18, 2013, the FirstMerit Corporation Amended and Restated Supplemental Executive Retirement Plan was amended to freeze the benefit payable to the Corporation’s Chairman, President and Chief Executive Officer (“CEO”) at the level of the benefit accrued by the CEO under the plan as of November 30, 2013. Subsequent increases or decreases in the CEO’s compensation nor any changes in circumstances will cause any increase or decrease in the amount payable to the CEO under this plan. Postretirement medical and life insurance plan. The Corporation also sponsors a benefit plan that provided postretirement medical and life insurance for retired employees (“FirstMerit Postretirement Plan”). The Corporation’s medical contribution was limited to 200% of the 1993 level for employees who retire after January 1, 1993. Effective March 1, 2009, the Corporation discontinued the subsidy for retiree medical for current eligible active employees. Eligible employees who retired on or prior to March 1, 2009, were offered subsidized retiree medical coverage until age 65 . Employees who retired after March 1, 2009, do not receive a Corporation subsidy toward retiree medical coverage. Effective January 1, 2012, the FirstMerit Postretirement Plan was amended to cap the Corporation’s subsidy on retiree medical costs. Any cost incurred over the cap will be the responsibility of the retiree. Effective January 1, 2016, the FirstMerit Postretirement Plan was amended to cap the life insurance benefits for all retirees at $10,000 . Employer-provided subsidies under the postretirement medical plan will be discontinued after 2018. As a result, a three -year sunset of this subsidized coverage is reflected in the December 31, 2015 disclosures. Postretirement medical and life insurance plans were also maintained for certain former Citizens employees after the Acquisition Date through December 31, 2013, (“Citizens Postretirement Plan”). Citizens’ Postretirement Plan provided postretirement health and dental care to full-time employees who retired with eligibility for coverage based on historical plan terms. As of December 31, 2013, the Corporation adopted one postretirement plan covering all eligible FirstMerit and former Citizens employees, with the FirstMerit Postretirement Plan being the surviving plan. The Citizens Postretirement Plan ceased to exist after December 31, 2013, and future benefits to the existing participants of the Citizens Postretirement Plan will be provided under the FirstMerit Postretirement Plan. The Corporation reserves the right to terminate or amend the FirstMerit Postretirement Plan at any time. Other employee benefits. FirstMerit’s Amended and Restated Executive Deferred Compensation Plan (“FirstMerit Deferred Compensation Plan”) allows participating executives to elect to receive incentive compensation payable with respect to any year in whole Common Stock or cash, or to elect to defer receipt of any incentive compensation otherwise payable with respect to any year in increments of 1% . An account is maintained in the name of each participant and is credited with cash or Common Stock equal to the number of shares that could have been purchased with the amount of any compensation so deferred, at the closing price of the Common Stock on the day as of which the share account is so credited. The deferred compensation liability at December 31, 2015 , and 2014 , was $18.6 million and $19.0 million , respectively, and is included in accrued taxes, expenses and other liabilities on the accompanying Consolidated Balance Sheet. Savings plans . The Corporation maintains a retirement savings plan under Section 401(k) of the Internal Revenue Code of 1986, as amended, covering substantially all full-time and part-time employees beginning in the quarter following three months of continuous employment (“FirstMerit 401(k) Plan”). For the years ended December 31, 2015 and 2014 , the employer’s matching contribution to the FirstMerit 401(k) Plan was 100% on the first 3% and then 50% on the next 2% of the employee’s qualifying salary. Contributions made by the Corporation to the FirstMerit 401(k) Plan were $7.6 million for 2015 , $7.7 million in 2014 , and $4.4 million in 2013 . Matching contributions vest in accordance with plan specifications. From the Acquisition Date through the close of business December 31, 2013, eligible Citizens employees who were employed by the Corporation continued to be covered by an employee savings plan under Section 401(k) ("Citizens 401(k) Plan"). Contributions to the Citizens 401(k) Plan were matched 50% on the first 2% of salary deferred and 25% on the next 6% deferred. The Corporation contributed $1.1 million to the Citizens 401(k) Plan from Acquisition Date through December 31, 2013. The Citizens 401(k) Plan was merged with the FirstMerit 401(k) Plan as of close of business December 31, 2013. The plan terms of the merged plans are substantially the same as the FirstMerit 401(k) Plan. The Corporation maintained a qualified defined contribution plan known as Retirement Investment Plan through December 31, 2012. Effective with the termination of this plan as of January 1, 2013, the Corporation will provide, for a five-year period, a transition contribution equal to 3% of an employee’s qualifying salary to all eligible plan participants that have earned 60 age-plus-service points, as of December 31, 2012. This transition contribution totaled $0.9 million and $0.7 million for the years ended December 31, 2015 and December 31, 2014 , respectively. The combined components of net periodic pension and postretirement benefits and other amounts recognized in AOCI for the Corporation's pension and postretirement benefit plans as of December 31, 2015 , 2014 and 2013 , are as follows: Pension Benefits Postretirement Benefits (In thousands) 2015 2014 2013 2015 2014 2013 Net periodic cost consists of: Service cost $ 830 $ 728 $ 2,339 $ 165 $ 65 $ 99 Interest cost 14,069 14,337 12,814 575 655 563 Expected return on plan assets (15,607 ) (16,035 ) (14,938 ) — — — Amortization of prior service cost/(credit) 2,279 2,599 467 (639 ) (468 ) (468 ) Amortization of actuarial (gains)/losses 4,227 2,930 4,693 325 236 268 Settlement / curtailment income — — (524 ) — — — Net periodic cost (benefit) 5,798 4,559 4,851 426 488 462 Other changes in plan assets and benefit obligations recognized in Other comprehensive income: Current year actuarial losses/(gains) 7,987 49,488 (47,257 ) (8,103 ) 64 (682 ) Amortization of actuarial gains/(losses) (4,227 ) (2,930 ) (4,169 ) (325 ) (236 ) (268 ) Amortization of prior service (cost)/credit (2,279 ) (2,599 ) (467 ) 639 468 468 Total recognized in AOCI, before income taxes 1,481 43,959 (51,893 ) (7,789 ) 296 (482 ) Total recognized in net periodic cost and AOCI $ 7,279 $ 48,518 $ (47,042 ) $ (7,363 ) $ 784 $ (20 ) A measurement date of December 31 is used for plan assets and benefit obligations. The following table sets forth a reconciliation of the changes in the projected benefit obligation for the Corporation’s pension and postretirement benefit plans as of December 31, 2015 , and 2014 , as well as the change in plan assets for the Corporation’s qualified pension plans: Pension Benefits Postretirement Benefits (In thousands) 2015 2014 2015 2014 Accumulated benefit obligation, end of year $ 339,661 $ 354,402 Change in projected benefit obligation: Projected benefit obligation, beginning of year 355,642 308,834 $ 15,164 $ 15,544 Service cost 830 728 165 65 Interest cost 14,069 14,337 575 655 Plan amendments — — (7,657 ) (1,979 ) Participant contributions — — 1,805 1,851 Actuarial (gains)/losses and change in assumptions (10,469 ) 50,115 (446 ) 2,046 Benefits paid (19,252 ) (18,372 ) (2,765 ) (3,018 ) Projected benefit obligation, end of year $ 340,820 $ 355,642 $ 6,841 $ 15,164 Change in plan assets, at fair value: Fair value of plan assets, beginning of year $ 257,355 $ 257,510 $ — $ — Actual return on plan assets (2,849 ) 16,663 — — Participant contributions — — 1,805 1,851 Employer contributions 1,527 1,554 960 1,167 Benefits paid (19,252 ) (18,372 ) (2,765 ) (3,018 ) Fair value of plan assets, end of year $ 236,781 $ 257,355 $ — $ — Funded status (1) (104,039 ) (98,287 ) (6,841 ) (15,164 ) Amounts recognized in AOCI before income taxes: Prior service cost (credit) $ 308 $ 2,587 $ (12,389 ) $ (5,370 ) Net actuarial loss 103,477 99,715 4,364 5,138 Amount recognized in AOCI $ 103,785 $ 102,302 $ (8,025 ) $ (232 ) (1) The Corporation recognizes the underfunded status of the plans in accrued taxes, expenses and other liabilities on the Consolidated Balance Sheet. As indicated in the table above, the benefit obligation and accumulated benefit obligation for all of the Corporation’s pension plans were in excess of the fair value of plan assets. Actuarial assumptions. The actuarial assumptions used to determine year end obligations for the Corporation’s pension and postretirement plans were as follows: Weighted-average assumptions for year end obligations 2015 2014 2013 Discount rate Qualified pensions 4.57 % 4.19 % 4.99 % Nonqualified pensions 3.99 % 3.61 % 4.12 % Postretirement medical benefits, FirstMerit’s plan 1.76 % 3.50 % 4.01 % Postretirement medical benefits, Citizens’ plan 1.77 % 3.61 % 3.98 % Postretirement life insurance benefits 4.79 % 4.36 % 5.08 % Expected long-term rate of return 6.00 % 6.50 % 6.75 % Rate of compensation increase Qualified pensions na na na Nonqualified pensions 3.75 % 3.75 % 3.75 % Assumed health care cost trend rate, pre-65 (1) (2) Initial trend na 7.00 % 7.50 % Ultimate trend na 5.00 % 5.00 % Year ultimate trend reached na 2019 2019 Assumed health care cost trend rate, post-65 (1) (2) Initial trend na 11.00 % 11.50 % Ultimate trend na 5.00 % 5.00 % Year ultimate trend reached na 2027 2027 Prescription Drugs (2) Initial trend na 7.00 % 7.50 % Ultimate trend na 5.00 % 5.00 % Year ultimate trend reached na 2019 2019 (1) The health care cost trend assumptions relate only to the postretirement benefit plans. Increasing or decreasing the assumed health care cost trend rates by one percentage point each future year would not have a material impact on total service and interest cost or the year end benefit obligation. (2) Employer-provided subsidies under the postretirement medical plan will be discontinued after 2018. As a result, a three-year sunset of this subsidized coverage is reflected in the December 31, 2015 disclosures. Since employer subsidies are not expected to change from current levels, health care trend rates no longer have any impact on the accounting liabilities. The actuarial assumptions used as of the beginning of the year to determine the net periodic costs for the Corporation’s pension and postretirement plans were as follows: Weighted-average assumptions for benefit cost at beginning of year 2015 2014 2013 Discount rate Qualified pension 4.19 % 4.99 % 4.21 % Nonqualified pensions 3.61 % 4.12 % 4.21 % Postretirement medical benefits 3.50 % 4.01 % 3.18 % Postretirement life insurance benefits 4.36 % 5.08 % 4.30 % Expected long-term rate of return 6.50 % 6.75 % 7.00 % Rate of compensation increase Qualified pension na na na Nonqualified pensions 3.75 % 3.75 % 3.75 % Assumed health care cost trend rate, pre-65 (1) Initial trend 7.00 % 7.50 % 8.00 % Ultimate trend 5.00 % 5.00 % 5.00 % Year ultimate trend reached 2019 2019 2019 Assumed health care cost trend rate, post-65 (1) Initial trend 11.50 % 11.50 % 12.00 % Ultimate trend 5.00 % 5.00 % 5.00 % Year ultimate trend reached 2027 2027 2027 Prescription Drugs Initial trend 7.50 % 7.50 % 8.00 % Ultimate trend 5.00 % 5.00 % 5.00 % Year ultimate trend reached 2019 2019 2019 (1) The health care cost trend assumptions relate only to the postretirement benefit plans. Increasing or decreasing the assumed health care cost trend rates by one percentage point each future year would not have a material impact on total service and interest cost or the year end benefit obligation The discount rates are determined independently for each plan and reflect the market rate for high-quality fixed income debt instruments, that are rated double-A or higher by a recognized ratings agency. The rate of return on plan assets is a long-term assumption established by considering historic plan asset returns and anticipated returns of the asset classes invested in by the pension plan and the allocation strategy currently in place among those classes. The expected return on equities was computed using a valuation framework, which projected future returns based on current equity valuations rather than historical returns. Due to active management of the plan’s assets, the return on the plan equity investments historically has exceeded market averages. Management estimated the rate by which the plan assets would outperform the market in the future based on historical experience adjusted for changes in asset allocation and expectations for overall future returns on equities compared to past periods. The Medicare Prescription Drug, Improvement, and Modernization Act of 2003 introduced a prescription drug benefit under Medicare, and provides a federal subsidy to sponsors of retiree healthcare benefit plans that offer “actuarially equivalent” prescription drug coverage to retirees. For the years ended December 31, 2015 , 2014 , and 2013 , these subsidies did not have a material effect on the APBO and net postretirement benefit cost for the Corporation. Net unrecognized actuarial gains or losses and prior service costs are recognized as an adjustment to accumulated other comprehensive income, net of tax, in the period they arise and, subsequently, recognized as a component of net periodic benefit cost over the average remaining service period of the active employees. The amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost (credit) during the next fiscal year are as follows: (In thousands) Pension Postretirement Total Prior service cost/(credit) $ 300 $ (2,542 ) $ (2,242 ) Actuarial net loss 3,321 981 4,302 At December 31, 2015 , the FirstMerit Pension Plan was sufficiently funded under the requirements of ERISA, consequently, the Corporation was not required to make a minimum contribution to that plan in 2015. The Corporation expects to make a $35.0 million contribution to its qualified pension plan during 2016 but does not expect to make any significant discretionary contributions to its non-qualified or postretirement plans during 2016. At December 31, 2015 , the following table shows when benefit payments were expected to be paid. The expected benefits were estimated using the same assumptions as those used to calculate the benefit obligations in the preceding tables and includes benefits attributable to estimated future employee service. (In thousands) For the year ended December 31, Pension Postretirement 2016 $ 31,328 $ 982 2017 25,366 903 2018 24,653 843 2019 21,567 225 2020 19,463 228 2021 through 2025 95,975 1,210 FirstMerit Pension Plan Investment Policy and Strategy. The FirstMerit Pension Plan invests in equities and other return-seeking assets such as real assets, as well as liability-hedging assets, primarily fixed income. The Investment Policy recognizes that the plan’s asset return requirements and risk tolerances will change over time. The Corporation utilizes a dynamic investment policy, whereby the allocation to return-seeking assets and liability-hedging assets is determined by comparing plan assets to the plan liabilities. As the plan’s funded ratio status improves, the allocation to liability-hedging assets will increase. Dynamic Investment Policy Schedule Return-Seeking (and Diversification) Allocation Strategy Funded Ratio Minimum Target Maximum ≤97% 36% 40% 44% 98% 34% 38% 42% 99% 31% 35% 39% 100% 30% 33% 36% 101% 28% 31% 34% 102% 26% 29% 32% 103% 23% 26% 29% 104% 21% 24% 27% 105% 18% 21% 24% 106% 16% 18% 20% 107% 12% 14% 16% ≥108% 8% 10% 12% The weighted-average allocations for the FirstMerit Pension Plan as of December 31, 2015 and 2014 , by asset category, are as follows: Percentage of December 31, Asset Category 2015 2014 Cash and domestic money market funds 1.95 % 1.49 % U.S. Treasury obligations 2.40 % 1.97 % U.S. Government agencies 1.08 % 1.12 % Corporate bonds 2.74 % 2.79 % Common stocks 14.30 % 13.54 % Equity mutual funds 17.61 % 18.85 % Fixed income mutual funds 49.62 % 50.11 % Foreign mutual funds 10.30 % 10.13 % 100.00 % 100.00 % The following is a description of the valuation methodologies used to measure assets held by the FirstMerit Pension Plans at fair value. • Domestic and foreign money market funds: Valued at quoted prices as reported on the active market in which the money market funds are traded. • United States government securities, United States government agency issues and corporate bonds : Valued using independent evaluated prices which are based on observable inputs, such as available trade information, spreads, bids and offers, and United States Treasury curves. • Common stocks : Valued at the closing price reported on the active market in which the individual securities are traded. • Registered equity, fixed income and foreign mutual funds: Valued at quoted prices as reported on the active market in which the securities are traded. The preceding methods described may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, although the Corporation believes its valuation method is appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of financial instruments could result in a different fair value measurement at the reporting date. The following table sets forth by level, within the fair value hierarchy, the FirstMerit Pension Plan’s assets at fair value as of December 31, 2015 : (In thousands) Level 1 Level 2 Level 3 Total Domestic money market funds $ 4,620 $ — $ — $ 4,620 United States government securities — 5,675 — 5,675 United States government agency issues — 2,588 — 2,588 Corporate bonds — 6,479 — 6,479 Common stocks 33,851 — — 33,851 Equity mutual funds 41,706 — — 41,706 Fixed income mutual funds 117,485 — — 117,485 Foreign mutual funds 24,377 — — 24,377 Total assets at fair value $ 222,039 $ 14,742 $ — $ 236,781

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2015
Share-based Compensation [Abstract]
Share-Based Compensation	Share-Based Compensation The Corporation’s 2002, 2006 and 2011 Stock and Equity Plans, and the Citizens Republic Bancorp, Inc. Stock Compensation plan, and the Republic Bancorp, Inc 1998 Stock Option Plan that were assumed by the Corporation in connection with the Citizens acquisition (the “Plans”), provide stock options and restricted stock awards available to grant to employees for up to 5,298,056 shares of Common Stock of the Corporation. The Plans also provide for the granting of nonqualified stock options and nonvested (restricted) shares to certain nonemployee directors of the Corporation. Outstanding options under these Plans are generally not exercisable for twelve months from date of grant. The total share-based compensation expense recognized during the years ended December 31, 2015 , 2014 , and 2013 , was $14.2 million , $13.9 million , and $10.9 million , respectively, and the related tax benefit was $5.0 million , $4.9 million , and $3.8 million , respectively. Share-based compensation expense related to awards granted to employees as well as awards granted to directors is recorded in salaries, wages, pension and employee benefits in the accompanying Consolidated Statements of Income. Certain of the Corporation’s share-based award grants contain terms that provide for a graded vesting schedule whereby portions of the award vest in increments over the requisite service period. The Corporation has elected to recognize compensation expense for awards with graded vesting schedule on a straight-line basis over the service period for the entire award. Compensation expense is recognized based on the estimated number of stock options and awards for which service is to be rendered. Upon stock option exercise or stock unit conversion, it is the policy of the Corporation to issue shares from treasury stock. No open market repurchases of Common Stock are planned in the upcoming calendar year. The Corporation has the authority to issue shares well in excess of the total number of stock option and restricted stock awards available for grant. In accordance with the Corporation’s stock option and nonvested (restricted) shares plans, employee participants that are 55 or older and have fifteen years of service are eligible to retire. Prior to the Plans’ amendments during 2007, which eliminated post retirement vesting, all unvested awards at the time of retirement continued to vest. The Corporation accelerates the recognition of compensation costs for share-based awards granted or modified to retirement-eligible employees and employees who become retirement-eligible. The compensation cost of these awards is recognized over the period up to the date the employee first becomes eligible to retire. Stock Option Awards Options under these Plans are granted with an exercise price equal to the market price of the Corporation’s shares at the date of grant; those option awards generally vest based on three years of continuous service and have a 10 -year contractual term. Options granted as incentive stock options must be exercised within ten years and options granted as nonqualified stock options have terms established by the Compensation Committee of the Board and approved by the nonemployee directors of the Board. Upon termination, options are cancelable within defined periods based upon the reason for termination of employment. The Black-Scholes option pricing model was used to estimate the fair market value of the options at the date of grant. This model was originally developed for use in estimating the fair value of traded options which have different characteristics from the Corporation’s employee stock options. Because of these differences, the Black-Scholes model is not a perfect indicator of value of an employee stock option, but it is commonly used for this purpose. A summary of stock option activity under the Plans as of December 31, 2015 , 2014 , and 2013 , and changes during the years then ended is as follows: Options Shares (000’s) Weighted-Average Exercise Price Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value (000’s) Outstanding at January 1, 2013 1,820 $ 24.73 1.82 — Acquired 63 218.01 Exercised — — Forfeited (8 ) 23.93 Expired (479 ) 36.64 Outstanding at December 31, 2013 1,396 $ 28.84 1.14 $ 87 Exercised — — Forfeited — — Expired (558 ) 31.91 Outstanding at December 31, 2014 838 $ 26.64 0.62 $ — Exercised — — Forfeited — — Expired (582 ) 28.25 Outstanding at December 31, 2015 256 $ 23.00 0.52 $ — Exercisable at December 31, 2015 256 $ 23.00 0.52 $ — There were no options granted in the years ended December 31, 2015 , 2014 , and 2013 . During the years ended December 31, 2015 , 2014 , and 2013 , no options were exercised. At December 31, 2015 , there were no unrecognized compensation costs related to stock options granted to be realized under the Plans. Nonvested (Restricted) Stock Awards The market price of the Corporation’s Common Stock at the date of grant is used to estimate the fair value of nonvested (restricted) stock awards. A summary of the status of the Corporation’s nonvested shares as of December 31, 2015 , 2014 , and 2013 , and changes during the years then ended, is as follows: Weighted-Average Grant Date Nonvested (restricted) Stock Awards Shares (000’s) Fair Value Nonvested at January 1, 2013 1,079 $ 17.00 Granted 823 16.47 Vested (508 ) 17.90 Forfeited or expired (52 ) 16.89 Nonvested at December 31, 2013 1,342 $ 16.34 Granted 777 19.67 Vested (664 ) 16.30 Forfeited or expired (42 ) 18.16 Nonvested at December 31, 2014 1,413 $ 18.16 Granted 792 19.48 Vested (711 ) 18.95 Forfeited or expired (88 ) 18.99 Nonvested at December 31, 2015 1,406 $ 19.10 At December 31, 2015 , there was $16.4 million of total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Plans. That cost is expected to be recognized over a weighted-average period of 1.47 years. The total fair value of shares vested during the year ended December 31, 2015 , 2014 , and 2013 , was $13.5 million , $10.8 million , and $9.1 million , respectively.

Parent Company

Parent Company	12 Months Ended
	Dec. 31, 2015
Parent Company [Abstract]
Parent Company	Parent Company Condensed financial information of FirstMerit Corporation (Parent Company only) is as follows: (In thousands) As of December 31, Condensed Balance Sheets 2015 2014 Assets: Cash and due from banks $ 99,638 $ 142,950 Investment securities 1,553 1,553 Investment in subsidiaries, at equity in underlying value of their net assets 3,087,651 2,936,865 Other assets 16,565 20,479 Total Assets $ 3,205,407 $ 3,101,847 Liabilities and Shareholders’ Equity: Long-term debt $ 248,443 $ 249,935 Accrued and other liabilities 16,869 17,631 Shareholders’ equity 2,940,095 2,834,281 Total Liabilities and Shareholders’ Equity $ 3,205,407 $ 3,101,847 (In thousands) Years Ended December 31, Condensed Statements of Income 2015 2014 2013 Income: Cash dividends from subsidiaries $ 103,500 $ 82,642 $ 81,715 Noninterest income 480 437 483 Total income 103,980 83,079 82,198 Interest and other expenses 27,096 30,613 29,684 Income before income tax benefit and equity in undistributed income of subsidiaries 76,884 52,466 52,514 Income tax benefit (9,451 ) (10,324 ) (9,341 ) Income before equity in undistributed net income of subsidiaries 86,335 62,790 61,855 Equity in undistributed income of subsidiaries 143,149 175,161 121,829 Net income $ 229,484 $ 237,951 $ 183,684 (In thousands) Years Ended December 31, Condensed Statements of Cash Flows 2015 2014 2013 Operating activities: Net income $ 229,484 $ 237,951 $ 183,684 Adjustments to reconcile net income to net cash provided by operating activities Equity in undistributed income of subsidiaries (143,149 ) (175,161 ) (121,829 ) Decrease (increase) in Federal income tax receivable 4,863 35,672 (30,399 ) Decrease (increase) in deferred Federal tax asset 1,776 (1,449 ) 27,032 Increase in interest payable — — 4,618 Other (4,978 ) (552 ) 924 Net cash provided by operating activities 87,996 96,461 64,030 Investing activities: Loans or advances to subsidiaries — — (50 ) Repayment of loans to or investment in subsidiaries — 110,675 — Cash paid for acquisition, net of cash received — — (315,069 ) Sale of investment securities — 784 — Purchases of investment securities — (81 ) (215 ) Net cash provided (used) by investing activities — 111,378 (315,334 ) Financing activities: Proceeds from issuance of subordinated debt — — 249,927 Proceeds from issuance of preferred stock — — 96,550 Repayment of long-term debt — (74,451 ) — Cash dividends - common stock (108,887 ) (105,333 ) (96,222 ) Cash dividends - preferred stock (5,876 ) (5,876 ) (5,337 ) Purchase of treasury shares (4,395 ) (4,261 ) (9,521 ) Repurchase of common stock warrant (12,150 ) — — Net cash (used) provided by financing activities (131,308 ) (189,921 ) 235,397 (Decrease) increase in cash and cash equivalents (43,312 ) 17,918 (15,907 ) Cash and cash equivalents at beginning of year 142,950 125,032 140,939 Cash and cash equivalents at end of year $ 99,638 $ 142,950 $ 125,032

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2015
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, eliminations companies, community development operations, the treasury group, which includes the securities portfolio, wholesale funding and asset liability management activities, and the economic impact of certain assets, capital and support functions not specifically identifiable with the three primary lines of business. The accounting policies of the lines of businesses are the same as those of the Corporation described in Note 1 ( Summary of Significant Accounting Policies ). Funds transfer pricing is used in the determination of net interest income by assigning a cost for funds used or credit for funds provided to assets and liabilities within each business unit. In the first quarter of 2014, Management changed the estimate regarding the funds transfer pricing crediting rate provided on non-maturity deposits, including amounts for 2013. 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 allocated capital based upon their respective market risk related to assets under management. Normal business operating risk has been allocated to each line of business by the level of noninterest expense. Mismatch between asset and liability cash flow as well as interest rate risk for mortgage servicing rights and the origination business franchise value have 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 years ended December 31, 2015 , 2014 , and 2013 : (In thousands) FirstMerit December 31, 2015 Commercial Retail Wealth Other Consolidated OPERATIONS: Net interest income/(expense) $ 406,520 $ 370,781 $ 22,403 $ (58,409 ) $ 741,295 Provision for loan losses 16,373 28,152 94 481 45,100 Noninterest income 88,384 96,979 57,995 25,640 268,998 Noninterest expense 240,634 345,827 54,681 (2,452 ) 638,690 Net income/(loss) 154,632 60,957 16,654 (2,759 ) 229,484 AVERAGES: Assets 9,464,876 6,022,529 298,435 9,369,952 25,155,792 Loans 9,550,421 5,775,543 289,044 58,192 15,673,200 Earnings assets 9,868,378 5,783,272 289,044 6,498,822 22,439,516 Deposits 7,071,238 11,035,639 1,215,174 536,799 19,858,850 Economic capital 1,309,589 807,150 115,447 670,974 2,903,160 (In thousands) FirstMerit December 31, 2014 Commercial Retail Wealth Other Consolidated OPERATIONS: Net interest income/(expense) $ 417,788 $ 383,151 $ 20,330 $ (45,701 ) $ 775,568 Provision for loan losses 2,898 39,618 1,895 7,868 52,279 Noninterest income 91,483 106,716 55,800 27,525 281,524 Noninterest expense 247,258 359,848 54,204 3,609 664,919 Net income/(loss) 171,560 58,760 13,021 (5,390 ) 237,951 AVERAGES: Assets 9,265,088 5,641,517 271,975 9,239,631 24,418,211 Loans 9,262,224 5,305,071 261,321 62,699 14,891,315 Earnings assets 9,549,341 5,328,107 261,321 6,363,978 21,502,747 Deposits 6,679,007 11,484,763 1,089,068 275,597 19,528,435 Economic capital 1,318,357 741,165 100,327 630,290 2,790,139 (In thousands) FirstMerit December 31, 2013 Commercial Retail Wealth Other Consolidated OPERATIONS: Net interest income/(expense) $ 408,006 $ 349,433 $ 17,192 $ (63,846 ) $ 710,785 Provision for loan losses 17,072 16,151 (692 ) 1,153 33,684 Noninterest income 83,933 114,679 48,289 23,442 270,343 Noninterest expense 209,936 330,875 54,196 89,246 684,253 Net income/(loss) 172,206 76,105 7,784 (72,411 ) 183,684 AVERAGES: Assets 8,397,357 4,746,277 259,601 8,086,540 21,489,775 Loans 8,292,805 4,367,701 226,152 62,008 12,948,666 Earnings assets 8,480,005 4,392,937 226,179 5,393,874 18,492,995 Deposits 5,572,287 10,749,725 826,794 152,782 17,301,588 Economic capital 602,561 256,362 72,244 1,477,698 2,408,865

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2015
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 at December 31, 2015 and 2014 : 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 — Nonagency 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, nonagency issued 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 sales 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 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 a credit of $0.6 million included in loans sales and servicing income in the year ended December 31, 2015 . (3) 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) December 31, 2014 Level 1 Level 2 Level 3 Recurring fair value measurement Available-for-sale securities: Marketable equity securities $ 2,974 $ 2,974 $ — $ — U.S. government agency debentures 2,482 — 2,482 — U.S. States and political subdivisions 227,342 — 227,342 — Residential mortgage-backed securities: U.S. government agencies 970,998 — 970,998 — Commercial mortgage-backed securities: U.S. government agencies 103,403 — 103,403 — Residential collateralized mortgage-backed securities: U.S. government agencies 1,676,567 — 1,676,567 — Nonagency 7 — 1 6 Commercial collateralized mortgage-backed securities: U.S. government agencies 222,334 — 222,334 — Corporate debt securities 51,337 — — 51,337 Asset-backed securities: Collateralized loan obligations, nonagency issued 287,844 — — 287,844 Total available-for-sale securities 3,545,288 2,974 3,203,127 339,187 Residential loans held for sale 13,428 — 13,428 — Derivative assets: Interest rate swaps - fair value hedges 5,256 — 5,256 — Interest rate swaps - nondesignated 48,366 — 48,366 — Mortgage loan commitments 1,408 — 1,408 — Foreign exchange 167 — 167 — Total derivative assets 55,197 — 55,197 — Total fair value of assets (1) $ 3,613,913 $ 2,974 $ 3,271,752 $ 339,187 Derivative liabilities: Interest rate swaps - fair value hedges 6,683 — 6,683 — Interest rate swaps - nondesignated 48,366 — 48,366 — Forward sale contracts 272 — 272 — Foreign exchange 118 — 118 — Total derivative liabilities 55,439 — 55,439 — True-up liability 13,294 — — 13,294 Total fair value of liabilities (1) $ 68,733 $ — $ 55,439 $ 13,294 Nonrecurring fair value measurement Mortgage servicing rights (2) $ 21,228 $ — $ — $ 21,228 Impaired loans (3) 56,041 — — 56,041 Other property (4) 12,510 — — 12,510 Other real estate covered by loss share (5) 3,614 — — 3,614 Total fair value $ 93,393 $ — $ — $ 93,393 (1) There were no transfers between levels 1, 2, or 3 of the fair value hierarchy during the year ended December 31, 2014 . (2) MSRs with a recorded investment of $22.0 million were reduced by a specific valuation allowance totaling $1.0 million to a reported carrying value of $21.1 million resulting in the recovery of previously recognized expense of $0.7 million included in loan sales and servicing income in the year ended December 31, 2014 . (3) Collateral dependent impaired loans with a recorded investment of $60.3 million were reduced by specific valuation allowance allocations totaling $4.3 million to a reported net carrying value of $56.0 million . (4) Amounts do not include assets held at cost at December 31, 2014 . During the year ended December 31, 2014 , the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $2.6 million included in noninterest expense. (5) Amounts do not include assets held at cost at December 31, 2014 . During the year ended December 31, 2014 , the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $1.2 million included in noninterest expense. The following section describes the valuation methodologies used by the Corporation to measure financial assets and liabilities at fair value. During years ended December 31, 2015 and 2014 , there were no significant changes to the valuation techniques used by the Corporation to measure fair value. A vailable-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 91% 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 and corporate CMO. 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 December 31, 2015 , approximately 9% 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. CLOs 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 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 mortgage servicing rights. 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 MSRs. Since the valuation model uses significant unobservable inputs, the Corporation classifies mortgage servicing rights 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 6 ( 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 risk by the lender or for a variety of other noneconomic 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 in the year ended December 31, 2015 . True-up liability. In connection with the George Washington and Midwest acquisitions in 2010, the Bank has agreed to pay the FDIC should the estimated losses on the acquired loan portfolios as well as servicing fees earned on the acquired loan portfolios not meet thresholds as stated in the loss sharing agreements (the “true-up liability”). This contingent consideration is classified as a liability within accrued taxes, expenses and other liabilities on the Consolidated Balance Sheet and is remeasured at fair value each reporting date until the contingency is resolved. The changes in fair value are recognized in earnings in the current period. An expected value methodology is used as a starting point for determining the fair value of the true-up liability based on the contractual terms prescribed in the loss sharing agreements. The resulting values under both calculations are discounted over 10 years (the period defined in the loss sharing agreements) to reflect the uncertainty in the timing and payment of the true-up liability by the Bank to arrive at a net present value. The discount rate used to value the true-up liability was 3.77% and 3.36% as of December 31, 2015 and 2014 , respectively. Increasing or decreasing the discount rate by one percentage point would change the liability by approximately $0.6 million and $0.7 million , respectively, as of December 31, 2015 . In accordance with the loss sharing agreements governing the Midwest acquisition, on July 15, 2020 (the “Midwest True-Up Measurement Date”), the Bank has agreed to pay to the FDIC half of the amount, if positive, calculated as: (1) 20% of the intrinsic loss estimate of the FDIC (approximately $152 million ); minus (2) the sum of (A) 25% of the asset premium paid in connection with the Midwest acquisition (approximately $21 million ); plus (B) 25% of the cumulative shared-loss payments (as defined below) plus (C) the cumulative servicing amount (as defined below). The fair value of the true-up liability associated with the Midwest acquisition was $9.3 million and $8.5 million as of December 31, 2015 , and December 31, 2014 , respectively. In accordance with the loss sharing agreements governing the George Washington acquisition, on April 14, 2020 (the “George Washington True-Up Measurement Date”), the Bank has agreed to pay to the FDIC 50% of the excess, if any, of (1) 20% of the stated threshold (approximately $34.4 million ) less (2) the sum of (A) 25% of the asset discount (approximately $12 million ) received in connection with the George Washington acquisition plus (B) 25% of the cumulative shared-loss payments (as defined below) plus (C) the cumulative servicing amount (as defined below). The fair value of the true-up liability associated with the George Washington acquisition was $5.5 million and $4.8 million as of December 31, 2015 , and December 31, 2014 , respectively. For the purposes of the above calculations, cumulative shared-loss payments means: (i) the aggregate of all of the payments made or payable to the Bank under the loss sharing agreements minus (ii) the aggregate of all of the payments made or payable to the FDIC. The cumulative servicing amount means the period servicing amounts (as defined in the loss sharing agreements) for every consecutive twelve-month period prior to and ending on the Midwest and George Washington True-Up Measurement Dates. The cumulative loss share payments and cumulative service amounts components of the true-up calculations are estimated each period end based on the expected amount and timing of cash flows of the acquired loan portfolios. See Note 3 ( Loans ) and Note 4 ( Allowance for Loan Losses ) for additional information on the estimated cash flows of the acquired loan portfolios. The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the years ended December 31, 2015 and 2014 are summarized as follows: Year Ended December 31, 2015 December 31, 2014 (In thousands) Available-for-sale securities True-up liability Available-for-sale securities True-up liability Balance at beginning of period $ 339,187 $ 13,294 $ 347,611 $ 11,463 Fair value of assets acquired — — — — (Gains) losses included in earnings (1) — 1,456 — 1,831 Unrealized gains (losses) (2) 2,653 — (6,030 ) — Purchases 79,446 — — — Sales (71,832 ) — — — Settlements (7,810 ) — (2,394 ) — Balance at ending of period $ 341,644 $ 14,750 $ 339,187 $ 13,294 (1) Reported in noninterest 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 December 31, 2015 and 2014 . The aggregate fair value, contractual balance, and gain or loss on loans held for sale was as follows: (In thousands) December 31, 2015 December 31, 2014 Aggregate fair value carrying amount $ 5,472 $ 13,428 Aggregate unpaid principal / contractual balance 5,320 12,912 Carrying amount over aggregate unpaid principal (1) $ 152 $ 516 (1) These changes are included in loan sales and servicing income in the Consolidated Statement 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 December 31, 2015 , and 2014 , are shown in the tables below. 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 — December 31, 2014 Carrying Amount Fair Value (In thousands) Total Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 697,424 $ 697,424 $ 697,424 $ — $ — Available-for-sale securities 3,545,288 3,545,288 2,974 3,203,127 339,187 Held to maturity securities 2,903,609 2,875,920 — 2,875,920 — Other securities 148,654 148,654 — 148,654 — Loans held for sale 13,428 13,428 — 13,428 — Net originated loans 12,398,116 12,235,530 — — 12,235,530 Net acquired loans 2,471,723 2,564,842 — — 2,564,842 Net FDIC acquired loans and loss share 312,659 312,659 — — 312,659 Accrued interest receivable 63,657 63,657 — 63,657 — Derivatives 55,197 55,197 — 55,197 — Financial liabilities: Deposits $ 19,504,665 $ 19,510,192 $ — $ 19,510,192 $ — Federal funds purchased and securities sold under agreements to repurchase 1,272,591 1,272,591 — 1,272,591 — Wholesale borrowings 428,071 430,676 — 430,676 — Long-term debt 505,192 516,476 — 516,476 — Accrued interest payable 9,820 9,820 — 9,820 — Derivatives 55,439 55,439 — 55,439 — The following methods and assumptions were used to estimate the fair values of each class of financial instrument presented: Cash and cash equivalents – For these short-term instruments, the carrying amount is considered a reasonable estimate of fair value. Investment securities – See Financial Instruments Measured at Fair Value above. Loans held for sale – The majority of loans held for sale are residential mortgage loans which are recorded at fair value. All other loans held for sale are recorded at the lower of cost or market, less costs to sell. See Financial Instruments Measured at Fair Value above. Net originated loans – The originated loan portfolio was segmented based on loan type and repricing characteristics. Carrying values are used to estimate fair values of variable rate loans. A discounted cash flow method was used to estimate the fair value of fixed-rate loans. Discounting was based on the contractual cash flows, and discount rates are based on the year-end yield curve plus a spread that reflects current pricing on loans with similar characteristics. If applicable, prepayment assumptions are factored into the fair value determination based on historical experience and current economic conditions. Net acquired and FDIC acquired loans – Fair values for acquired and FDIC acquired loans were estimated based on a discounted projected cash flow methodology that considered factors including the type of loan and related collateral, classification status, fixed or variable interest rate, term of loan and whether or not the loan was amortizing, and current discount rates. Loans were grouped together according to similar characteristics and were treated in the aggregate when applying various valuation techniques. The discount rates used for loans are based on current market rates for new originations of comparable loans and include adjustments for liquidity concerns. The discount rate does not include a factor for credit losses as that has been included in the estimated cash flows. Loss share receivable – This loss sharing asset is measured separately from the related covered assets as it is not contractually embedded in the covered assets and is not transferable with the covered assets should the Bank choose to dispose of them. Fair value was estimated using discounted projected cash flows related to the FDIC loss share agreements based on the expected reimbursements for losses and the applicable loss sharing percentages. These cash flows were discounted to reflect the uncertainty of the timing and receipt from the FDIC. Accrued interest receivable – The carrying amount is considered a reasonable estimate of fair value. Mortgage servicing rights – See Financial Instruments Measured at Fair Value above. Deposits – The estimated fair value of deposits with no stated maturity, which includes demand deposits, money market accounts and other savings accounts, are

Derivatives and Hedging Activit

Derivatives and Hedging Activity	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activity	Derivatives and Hedging Activity 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 December 31, 2015 and 2014 , 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 December 31, 2015 December 31, 2014 December 31, 2015 December 31, 2014 (In thousands) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps: Commercial Loan Swaps (FRAPS) $ — $ — $ — $ — $ 55,689 $ 3,536 $ 93,313 $ 6,683 Sub Debt Swap 250,000 8,739 250,000 5,256 — — — — Fair value hedges $ 250,000 $ 8,739 $ 250,000 $ 5,256 $ 55,689 $ 3,536 $ 93,313 $ 6,683 (1) Included in Other Assets on the Consolidated Balance Sheet (2) Included in Other Liabilities on the Consolidated Balance Sheet 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 meet 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 Bank 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 short cut 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 December 31, 2015 and 2014 , 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 December 31, 2015 December 31, 2014 December 31, 2015 December 31, 2014 (In thousands) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps $ 1,824,576 $ 48,920 $ 1,673,012 $ 48,366 $ 1,824,576 $ 48,920 $ 1,673,012 $ 48,366 Mortgage loan commitments 20,635 149 102,523 1,408 — — — — Forward sales contracts — — — — 9,659 5 47,657 272 Credit contracts — — 10,001 — 73,715 — 69,227 — Foreign exchange 13,671 299 22,406 167 11,706 284 6,580 118 Equity swap — — — — 36,631 — 25,198 — Total $ 1,858,882 $ 49,368 $ 1,807,942 $ 49,941 $ 1,956,287 $ 49,209 $ 1,821,674 $ 48,756 (1) Included in Other Assets on the Consolidated Balance Sheet (2) Included in Other Liabilities on the Consolidated Balance Sheet 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 stand-alone derivative. Mortgage banking . In the normal course of business, the Corporation sells originated mortgage loans into the secondary mortgage loan markets. During the period of loan origination and prior to the sale of the loans in the secondary market, the Corporation has exposure to movements in interest rates associated with mortgage loans that are in the “mortgage pipeline” and the “mortgage warehouse”. A pipeline loan is one in which the Corporation has entered into a written mortgage loan commitment with a potential borrower that will be held for resale. Once a mortgage loan is closed and funded, it is included within the mortgage warehouse of loans awaiting sale and delivery into the secondary market. Written loan commitments that relate to the origination of mortgage loans that will be held for resale are considered free-standing derivatives and do not qualify for hedge accounting. Written loan commitments generally have a term of up to 60 days before the closing of the loan. The loan commitment does not bind the potential borrower to entering into the loan, nor does it guarantee that the Corporation will approve the potential borrower for the loan. Therefore, when determining fair value, the Corporation makes estimates of expected “fallout” (loan commitments not expected to close), using models which consider cumulative historical fallout rates and other factors. In addition, expected net future cash flows related to loan servicing activities are included in the fair value measurement of a written loan commitment. Written loan commitments in which the borrower has locked in an interest rate results in market risk to the Corporation to the extent market interest rates change from the rate quoted to the borrower. The Corporation economically hedges the risk of changing interest rates associated with its interest rate lock commitments by entering into forward sales contracts. The Corporation’s warehouse (mortgage loans held for sale) is subject to changes in fair value, due to fluctuations in interest rates from the loan’s closing date through the date of sale of the loan into the secondary market. Typically, the fair value of the warehouse declines in value when interest rates increase and rises in value when interest rates decrease. To mitigate this risk, the Corporation enters into forward sales contracts on a significant portion of the warehouse to provide an economic hedge against those changes in fair value. Mortgage loans held for sale and the forward sales contracts were recorded at fair value with ineffective changes in value recorded in current earnings as Loan sales and servicing income. Credit contracts. The Corporation has bought and sold credit protection in the form of participations 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 eight 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 to ten years. The Corporation’s maximum estimated exposure to sold swap participations, as measured by projecting a maximum value of the guaranteed derivative instruments based on interest rate curve simulations and assuming 100% default by all obligors on the maximum values, was approximately $4.7 million as of December 31, 2015 . The fair values of the written swap participations were not material at December 31, 2015 or 2014 . Gains and losses recognized in income on nondesignated hedging instruments for the years ended December 31, 2015 , 2014 and 2013 , are as follows: (In thousands) Derivatives not instruments Location of Gain/(Loss) Derivative Amount of Gain / (Loss) Recognized in Income on Derivatives Year Ended December 31, 2015 2014 2013 Mortgage loan commitments Other operating income $ (1,260 ) $ 517 $ (3,509 ) Forward sales contracts Other operating income 267 (656 ) 446 Foreign exchange contracts Other operating income (2,154 ) (210 ) (233 ) Other Other operating expense — (515 ) — Total $ (3,147 ) $ (864 ) $ (3,296 ) 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 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 established 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 $47.2 million and $53.5 million as of December 31, 2015 and 2014 , respectively. Derivative assets and liabilities are recorded at fair value on the balance sheet and do not take into account the effects of master netting agreements the Corporation has with its financial institution counterparties. These master netting agreements allow the Corporation to settle all derivative contracts held with a single financial institution counterparty on a net basis, and to offset net derivative positions with related collateral, where applicable. Collateral, usually in the form of investment securities, is posted by the counterparty with net liability position in accordance with contract thresholds. The following tables illustrate the potential effect of the Corporation’s derivative master netting arrangements, by type of financial instrument, on the Corporation’s statement of financial position as of December 31, 2015 and 2014 . 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 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 - nondesignated 155 — 155 (155 ) — — Foreign exchange — — — — — — Total derivative assets $ 8,894 $ — $ 8,894 $ (155 ) $ — $ 8,739 Derivative Liabilities Interest rate swaps - designated $ 3,536 $ — $ 3,536 $ — $ (3,536 ) $ — Interest rate swaps - nondesignated 48,765 — 48,765 (155 ) (48,610 ) — Foreign exchange — — — — — — Total derivative liabilities $ 52,301 $ — $ 52,301 $ (155 ) $ (52,146 ) $ — As of December 31, 2014 Gross amounts recognized Gross amounts offset in the consolidated balance sheet Net amounts presented in the consolidated balance sheet Gross amounts not offset in the consolidated balance sheet Net amount (In thousands) Financial instruments (1) Collateral (2) Derivative Assets Interest rate swaps - designated $ 5,256 $ — $ 5,256 $ — $ — $ 5,256 Interest rate swaps - nondesignated 352 — 352 (352 ) — — Foreign exchange 134 — 134 (28 ) (106 ) — Total derivative assets $ 5,742 $ — $ 5,742 $ (380 ) $ (106 ) $ 5,256 Derivative Liabilities Interest rate swaps - designated $ 6,683 $ — $ 6,683 $ — $ (6,683 ) $ — Interest rate swaps - nondesignated 48,014 — 48,014 (352 ) (47,662 ) — Foreign exchange 28 — 28 (28 ) — — Total derivative liabilities $ 54,725 $ — $ 54,725 $ (380 ) $ (54,345 ) $ — (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 Sheet 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 Sheet unless the Corporation defaults

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Guarantees Obligations Under Noncancelable Leases The Corporation is obligated under various noncancelable operating leases on branch offices. Minimum future rental payments under noncancelable operating leases at December 31, 2015 are as follows: (In thousands) Years Ended December 31, Lease Commitments 2016 $ 11,942 2017 11,288 2018 9,842 2019 7,870 2020 6,605 2021-2034 18,521 Total minimum future rental payments $ 66,068 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 17 ( 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 December 31, 2015 , was $4.1 million , compared with $5.8 million at December 31, 2014 . Additional information pertaining to this allowance is included in Note 4 ( Allowance for Loan Losses ) and under the heading “ Allowance for Loan Losses and Reserve For Unfunded Lending Commitments ” within Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operation” of this report. The following table shows the remaining contractual amount of each class of commitments to extend credit as of December 31, 2015 and 2014 . This amount represents the Corporation’s maximum exposure to loss if the customer were to draw upon the full amount of the commitment and subsequently default on payment for the total amount of the then outstanding loan. At December 31, (In thousands) 2015 2014 Loan Commitments Commercial $ 3,992,089 $ 3,748,690 Consumer 2,393,058 2,387,623 Total loan commitments $ 6,385,147 $ 6,136,313 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. At December 31, (In thousands) 2015 2014 Financial guarantees Standby letters of credit $ 254,703 $ 242,390 Loans sold with recourse 12,902 45,071 Total financial guarantees $ 267,605 $ 287,461 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 and real estate. Any amounts drawn under standby letters of credit are treated as loans; they bear interest and pose the same credit risk to the Corporation as a loan. Except for short-term guarantees of $131.7 million at December 31, 2015 , the remaining guarantees extend in varying amounts through 2022 . Asset Sales The Corporation regularly sells service retained residential mortgage loans to GSEs as part of its mortgage banking activities. The Corporation provides customary representation and warranties to the GSEs in conjunction with these sales. These representations and warranties generally require the Corporation to repurchase assets if it is subsequently determined that a loan did not meet specified criteria, such as a documentation deficiency or rescission of mortgage insurance. If the Corporation is unable to cure or refute a repurchase request, the Corporation is generally obligated to repurchase the loan or otherwise reimburse the counterparty for losses. The Corporation also sells service released residential mortgage loans to other investors which contain early payment default recourse provisions. As of December 31, 2015 and 2014 , the Corporation had sold $10.1 million and $38.1 million , respectively, of outstanding residential mortgage loans to GSEs and other investors with recourse provisions. The Corporation had reserved $2.7 million and $7.3 million as of December 31, 2015 and 2014 , respectively, for estimated losses from representation and warranty obligations and early payment default recourse provisions. Due to prior acquisitions, as of December 31, 2014 the Corporation had serviced approximately $3.7 million of manufactured housing loans that were sold with recourse. The reserve associated with these manufactured loans was $1.1 million as of December 31, 2014 . As of December 31, 2015 the Corporation did not service any manufactured housing loans sold with recourse, and, as a result, did not recognize a reserve for estimated losses. The total reserve associated with loans sold with recourse was approximately $2.7 million and $8.4 million as of December 31, 2015 and 2014 , respectively, and is included in accrued taxes, expenses and other liabilities on the consolidated balance sheet. The Corporation’s reserve reflects management’s best estimate of losses. The Corporation's reserving methodology uses current information about investor repurchase requests, and assumptions about repurchase mix and loss severity, based upon the Corporation's most recent loss trends. The Corporation also considers qualitative factors that may result in anticipated losses differing from historical loss trends, such as loan vintage, underwriting characteristics and macroeconomic trends. Changes in the amount of the repurchase reserve for the years ended December 31, 2015 , and 2014 , are as follows: Year Ended December 31, 2015 (In thousands) Reserve on residential mortgage loans Reserve on manufactured housing loans Total repurchased reserve Balance at beginning of period $ 7,250 $ 1,124 $ 8,374 Net increase/(decrease) to reserve (3,638 ) (1,130 ) (4,768 ) Net realized gains/(losses) (887 ) 6 (881 ) Balance at end of period $ 2,725 $ — $ 2,725 Year Ended December 31, 2014 (In thousands) Reserve on residential mortgage loans Reserve on manufactured housing loans Total repurchased reserve Balance at beginning of period $ 8,737 $ 1,114 $ 9,851 Net increase/(decrease) to reserve (4,564 ) 10 (4,554 ) Net realized gains/(losses) 3,077 — 3,077 Balance at end of period $ 7,250 $ 1,124 $ 8,374 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 On February 11, 2016 and February 17, 2016, two putative derivative and class action lawsuits were filed by separate shareholders of FirstMerit Corporation in the Summit County Common Pleas Court, Ohio, entitled W. Patrick Murray vs. Huntington Bancshares Incorporated , Case No. CV-2016-02-0917 and The Robinson Family Trust vs. Paul Greig , Case No. CV-2016-02-0981 (the “Lawsuits”), relating to the proposed merger between Huntington Bancshares, Inc. and FirstMerit. The Murray complaint alleges that the individual board of directors of FirstMerit breached their fiduciary duties by approving a proposed merger that allegedly undervalues FirstMerit and purportedly provides the directors with benefits not afforded FirstMerit shareholders. It is also alleged that the Board, FirstMerit and Huntington aided and abetted those alleged breaches of fiduciary duty. The Robinson complaint makes similar allegations, and also alleges that the board approved deal protection devices to allegedly ensure that the acquisition would be consummated. The Complaints seek declaratory and injunctive relief to prevent the consummation of the merger, monetary damages, an award of fees and costs and other equitable relief.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2015
Stockholders' Equity Note [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 . 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 5.875% 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: Year Ended December 31, (In thousands, except per share amounts) 2015 2014 2013 Basic EPS: Net income $ 229,484 $ 237,951 $ 183,684 Less: Cash dividends on 5.875% non-cumulative perpetual series A, preferred stock 5,876 5,876 5,337 Income allocated to participating securities 1,836 1,930 1,545 Net income attributable to common shareholders $ 221,772 $ 230,145 $ 176,802 Weighted average Common Stock outstanding used in basic EPS 165,669 165,296 149,607 Basic net income per common share $ 1.34 $ 1.39 $ 1.18 Diluted EPS: Income used in diluted earnings per share calculation $ 221,772 $ 230,145 $ 176,802 Weighted average Common Stock outstanding used in basic EPS 165,669 165,296 149,607 Add: Common Stock equivalents: Employee stock award plans 458 758 814 Weighted average Common and Common Stock equivalent shares outstanding 166,127 166,054 150,421 Diluted net income per common share $ 1.33 $ 1.39 $ 1.18 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. There were $0.8 million antidilutive Common Stock equivalents for the year ended December 31, 2015 , and $0.8 million and $1.4 million antidilutive Common Stock equivalents for the years ended December 31, 2014 and 2013 , respectively.

Changes and Reclassifications O

Changes and Reclassifications Out of Other Comprehensive Income	12 Months Ended
	Dec. 31, 2015
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 components of comprehensive income for the years ended December 31, 2015 and 2014 : Year Ended December 31, 2015 (In thousands) Pre-tax 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) (19,842 ) (11,253 ) (8,589 ) Changes in unrealized securities’ holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity (3,456 ) (1,254 ) (2,202 ) Net losses/(gains) realized on sale of securities reclassified to noninterest income (957 ) (348 ) (609 ) Balance at the end of the period (32,786 ) (15,840 ) (16,946 ) Pension plans and other postretirement benefits: Balance at the beginning and end of the period (102,068 ) (35,722 ) (66,346 ) Current year actual gains/(losses) 116 42 74 Amortization of actuarial losses/(gains) 4,552 1,652 2,900 Amortization of prior service cost reclassified to other noninterest expense 1,640 596 1,044 Balance at the end of the period (95,760 ) (33,432 ) (62,328 ) Total Accumulated Other Comprehensive Income $ (128,546 ) $ (49,272 ) $ (79,274 ) Year Ended December 31, 2014 (In thousands) Pre-tax Tax After-tax Unrealized and realized securities gains and losses: Balance at the beginning of the period $ (45,072 ) $ (15,776 ) $ (29,296 ) Changes in unrealized securities’ holding gains/(losses) 38,864 13,602 25,262 Changes in unrealized securities’ holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity (2,157 ) (753 ) (1,404 ) Net losses/(gains) realized on sale of securities reclassified to noninterest income (166 ) (58 ) (108 ) Balance at the end of the period (8,531 ) (2,985 ) (5,546 ) Pension plans and other postretirement benefits: Balance at the beginning and end of the period (57,813 ) (20,233 ) (37,580 ) Current year actual gains/(losses) (49,552 ) (17,344 ) (32,208 ) Amortization of actuarial losses/(gains) 3,166 1,108 2,058 Amortization of prior service cost reclassified to other noninterest expense 2,131 747 1,384 Balance at the end of the period (102,068 ) (35,722 ) (66,346 ) Total Accumulated Other Comprehensive Income $ (110,599 ) $ (38,707 ) $ (71,892 ) The following table presents current period reclassifications out of AOCI by component of comprehensive income for the years ended December 31, 2015 and 2014 : (In thousands) Year Ended December 31, 2015 Statement of Income line item presentation Realized (gains) losses on sale of securities $ (957 ) Investment securities losses (gains), net Tax expense (benefit) (36.3%) (348 ) Income tax expense (benefit) Reclassified amount, net of tax $ (609 ) (In thousands) Year Ended December 31, 2014 Statement of Income line item presentation Realized (gains) losses on sale of securities $ (166 ) Investment securities losses (gains), net Tax expense (benefit) (35%) (58 ) Income tax expense (benefit) Reclassified amount, net of tax $ (108 )

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2015
Regulatory Capital Requirements [Abstract]
Regulatory Matters	Regulatory Matters The Corporation is subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory – and possibly additional discretionary – actions by regulators that, if undertaken, could have a material effect on the Corporation’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Corporation must meet specific capital guidelines that involve quantitative measures of the Corporation’s assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. The Corporation’s capital amounts and classification are also subject to quantitative judgments by regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Corporation to maintain minimum amounts and ratios (set forth in the following table) of total risk-based capital, CET1 and Tier 1 capital to risk-weighted assets, and of Tier 1 capital to average assets. At December 31, 2015 and 2014 , Management believes the Corporation meets all capital adequacy requirements to which it is subject. The capital terms used in this note to the consolidated financial statements are defined in the regulations as well as in the “Capital Resources” section of Management’s Discussion and Analysis of Financial Condition and Results of Operations in this Form 10-K. (Dollars in thousands) Consolidated Actual Adequately Capitalized: Well Capitalized: As of December 31, 2015 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital (1) (2) (to Risk Weighted Assets) $ 2,733,143 13.74 % $ 1,591,341 8.00 % $ 1,989,176 10.00 % CET1 capital (1) (2) (to Risk Weighted Assets) 2,119,025 10.65 % 895,129 4.50 % 1,292,964 6.50 % Tier 1 Capital (1) (2) (to Risk Weighted Assets) 2,119,025 10.65 % 1,193,506 6.00 % 1,591,341 8.00 % Tier 1 leverage (1) (2) (to Average Assets) 2,119,025 8.63 % 981,690 4.00 % 1,227,113 5.00 % Actual Adequately Capitalized: Well Capitalized: As of December 31, 2014 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital (1) (2) (to Risk Weighted Assets) $ 2,653,893 15.26 % $ 1,391,282 8.00 % $ 1,739,102 10.00 % Tier 1 Capital (1) (2) (to Risk Weighted Assets) 2,004,461 11.53 % 695,641 4.00 % 1,043,461 6.00 % Tier 1 leverage (1) (2) (to Average Assets) 2,004,461 8.43 % 951,430 4.00 % 1,189,287 5.00 % (1) See Figure 4 entitled GAAP to Non-GAAP Reconciliations , which presents the computations of certain financial measures related to tangible common equity and efficiency ratios. The table reconciles the GAAP performance measures to the corresponding non-GAAP measures, which provides a basis for period to period comparisons. (2) The Basel III capital rules, effective January 1, 2015, replace tier 1 common equity and the associated tier 1 common equity ratio with CET1 capital and the CET1 risk-based capital ratio. December 31, 2015 figures are presented on a Basel III basis and reflect transitional capital requirements and phase-in provisions, including the standardized approach for calculating risk weighted assets. December 31, 2014 amounts and ratios are reported on a Basel I basis. At December 31, 2015 and 2014 , the most recent notification from the OCC categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well-capitalized the Bank must maintain minimum total risk-based, CET1 risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the table. In Management’s opinion, there are no conditions or events since the OCC’s notification that have changed the Bank’s categorization as “well-capitalized.” Bank Only (Dollars in thousands) Actual Adequately Capitalized: Well Capitalized: As of December 31, 2015 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital (1) (2) (to Risk Weighted Assets) $ 2,668,419 13.42 % $ 1,590,382 8.00 % $ 1,987,978 10.00 % CET1 capital (1) (2) (to Risk Weighted Assets) 2,262,669 11.38 % 894,590 4.50 % 1,292,185 6.50 % Tier 1 Capital (1) (2) (to Risk Weighted Assets) 2,262,669 11.38 % 1,192,787 6.00 % 1,590,382 8.00 % Tier 1 leverage (1) (2) (to Average Assets) 2,262,669 9.23 % 980,975 4.00 % 1,226,219 5.00 % Actual Adequately Capitalized: Well Capitalized: As of December 31, 2014 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital (1) (2) (to Risk Weighted Assets) $ 2,521,412 14.49 % $ 1,391,988 8.00 % $ 1,739,986 10.00 % Tier 1 Capital (1) (2) (to Risk Weighted Assets) 2,127,065 12.22 % 695,994 4.00 % 1,043,991 6.00 % Tier 1 leverage (1) (2) (to Average Assets) 2,127,065 8.94 % 951,455 4.00 % 1,189,319 5.00 % (1) See Figure 4 entitled GAAP to Non-GAAP Reconciliations , which presents the computations of certain financial measures related to tangible common equity and efficiency ratios. The table reconciles the GAAP performance measures to the corresponding non-GAAP measures, which provides a basis for period to period comparisons. (2) The Basel III capital rules, effective January 1, 2015, replace tier 1 common equity and the associated tier 1 common equity ratio with CET1 capital and the CET1 risk-based capital ratio. December 31, 2015 figures are presented on a Basel III basis and reflect transitional capital requirements and phase-in provisions, including the standardized approach for calculating risk weighted assets. December 31, 2014 amounts and ratios are reported on a Basel I basis. FirstMerit Mortgage Corporation, a subsidiary of the Corporation, is subject to net worth requirements issued by the U.S. Department of Housing and Urban Development (“HUD”). Failure to meet minimum capital requirements of HUD can result in certain mandatory and possibly additional discretionary actions that, if undertaken, could have a direct material effect on FirstMerit Mortgage Corporation's operations. The minimum net worth requirement of HUD at December 31, 2015 , and 2014 , was $1.0 million . FirstMerit Mortgage Corporations’ net worth significantly exceeded the HUD requirements at December 31, 2015 , and 2014 .

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2015
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. 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 Accoun32

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Basis of Presentation
Basis of Accounting	The accounting and reporting policies of the Corporation conform to GAAP and to general practices within the financial services industry. In preparing these accompanying consolidated financial statements, subsequent events were evaluated through the time the consolidated 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. The following is a description of the Corporation’s significant accounting policies.
Principles of Consolidation	Principles of Consolidation The Parent Company is a bank holding company whose principal asset is the common stock of its wholly-owned subsidiary, the Bank. The Parent Company has one other active subsidiary, FirstMerit Risk Management, Inc. All significant intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates Management must make certain estimates and assumptions that affect the amounts reported in the financial statements and related notes. If these estimates prove to be inaccurate, actual results could differ from those reported.
Business Combinations	Business Combinations Business combinations are accounted for using the acquisition method of accounting. Under this accounting method, the acquired company's net assets are recorded at fair value on the date of acquisition, and the results of operations of the acquired company are combined with the Corporation's results from that date forward. Costs related to the acquisition are expensed as incurred. The difference between the purchase price and the fair value of the net assets acquired (including intangible assets with finite lives) is recorded as goodwill. The accounting policy for goodwill and intangible assets is summarized in this note under the heading "Goodwill and Other Intangible Assets".
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents consist of cash and due from banks, interest bearing deposits in other banks and checks in the process of collection.
Investment Securities	Investment Securities Debt securities are classified as held-to-maturity when the Corporation has the positive intent and ability to hold the securities to maturity. These securities are reported at amortized cost, adjusted for amortization of premiums and accretion of discounts to maturity using the effective yield method. This method produces a constant rate of return on the adjusted carrying amount. Securities are classified as available-for-sale when the Corporation intends to hold the securities for an indefinite period of time but may be sold in response to changes in interest rates, prepayment risk, liquidity needs or other factors. Securities available-for-sale are reported at fair value, with unrealized gains and losses, net of income tax, reported as a separate component of other comprehensive income (loss) in shareholders’ equity. In certain situations, Management may elect to transfer certain debt securities from the available-for-sale to the held to maturity classification. In such cases, any unrealized gain or loss included in accumulated other comprehensive income (loss) at the time of transfer is amortized over the remaining life of the security as a yield adjustment such that only the remaining initial discount or premium from the purchase date is recognized in income. Interest and dividends on securities, including the amortization of premiums and accretion of discount, are included in interest income. Realized gains or losses on the sales of available-for-sale securities are recorded on the trade date and determined using the specific identification method. On at least a quarterly basis, Management evaluates securities that are in an unrealized loss position for OTTI. An investment security is deemed impaired if the fair value of the investment is less than its amortized cost. As part of the impairment evaluation, Management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in earnings, and 2) OTTI related to other factors, such as liquidity conditions in the market or changes in market interest rates, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. For equity securities, the entire amount of impairment is recognized in earnings. Other investments include FHLB and FRB stock. As a member of the FHLB system, the Bank is required to own a certain amount of stock based on the level of borrowings and other factors. The Bank is also a member of its regional FRB. Both FHLB and FRB stock are carried at cost and evaluated for impairment based on the ultimate recovery of par value. Cash and stock dividends received on the stock are reported as interest income in the Consolidated Statement of Income.
Originated Loans and Loan Income	Originated Loans and Loan Income 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 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.
Loans Held for Sale	Loans Held for Sale Mortgage loans originated and intended for sale in the secondary market are carried at fair value. The election of the fair value option aligns the accounting for these loans with the related economic hedges. Loan origination fees are recorded when earned and related direct loan origination costs are recognized when incurred. Upon their sale, differences between carrying value and sales proceeds realized are recorded to loan sales and servicing income in the Consolidated Statement of Income. A discussion of the valuation methodology applied to the Corporation’s loans held for sale is described in Note 17 ( Fair Value Measurement ).
Nonperforming Loans	Nonperforming Loans Loans and leases on which payments are past due for 90 days are placed on nonaccrual, with the exception of certain commercial, credit card and mortgage loans and loans that are fully secured and in process of collection. Credit card loans on which payments are past due for 120 days are placed on nonaccrual status. Interest on mortgage loans is accrued until Management deems it uncollectible based upon the specific identification method. Past due status is based on the contractual terms of the loan. Loans are placed on nonaccrual or charged off at an earlier date if principal or interest is considered uncollectible. 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. When a loan is placed on nonaccrual status, interest deemed uncollectible that had been accrued in prior years is charged against the allowance for loan losses and interest deemed uncollectible accrued in the current year is reversed against interest income. 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 payment cycles. Under the Corporation’s credit policies and practices, individually impaired loans include all nonaccrual and restructured commercial, agricultural, construction, and commercial real estate loans, but exclude certain aggregated consumer loans, mortgage loans, and leases classified as nonaccrual. Loan impairment for all loans is measured based on either the present value of expected future cash flows discounted at the loan’s effective interest rate at inception, at the observable market price of the loan, or the fair value of the collateral for certain collateral dependent loans. Restructured loans are those on which concessions in terms have been made as a result of deterioration in a borrower’s financial condition. In general, the modification or restructuring of a debt constitutes a troubled debt restructuring if the Corporation for economic or legal reasons related to the borrower’s financial difficulties grants a concession to the borrower that the Corporation would not otherwise consider under current market conditions. Debt restructurings or loan modifications for a borrower do not necessarily constitute troubled debt restructurings. Troubled debt restructurings do not necessarily result in nonaccrual loans. Specific allowances for loan losses are established for certain consumer, commercial and commercial real estate loans whose terms have been modified in a TDR. Acquired nonimpaired loans are placed on nonaccrual and considered and reported as nonperforming or past due using the same criteria applied to the originated portfolio. Acquired impaired loans are not classified as nonperforming assets as the loans are considered to be performing under the provisions of ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality (“ASC 310-30”). Acquired loans restructured after acquisition are not considered TDRs for purposes of the Corporation’s accounting and disclosure if the loans evidenced credit deterioration as of the acquisition date and are accounted for in pools.
Allowance for Loan Losses	Allowance for Loan Losses The allowance for loan losses is Management’s estimate of the amount of probable credit losses inherent in the loan portfolio at the balance sheet date. Increases to the allowance for loan losses are made by charges to the provisions for loan losses. Loans deemed uncollectible are charged against the allowance for loan losses. Recoveries of previously charged-off amounts are credited to the allowance for loan losses. Management estimates credit losses based on individual loans determined to be impaired and on all other loans grouped based on similar risk characteristics. The Corporation’s historical loss component is the most significant of the allowance for loan losses 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). Loans are pooled based on similar risk characteristics supported by observable data. The historical loss experience component of the allowance for loan losses 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. 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 individual borrower. Certain commercial loans are reviewed on an annual, quarterly or rotational basis or as Management becomes aware of information affecting a borrower’s ability to fulfill its obligation. 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. 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, if any, and assign a specific allowance to the loan if needed. The allowance for loan losses relating to originated loans that have become impaired is based on either expected cash flows discounted at the loan’s original effective interest rate, the observable market price, or the fair value of the collateral for certain collateral dependent loans. Management also considers internal and external factors such as economic conditions, credit quality trends, 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 also assesses the credit risk associated with off-balance sheet loan commitments and letters of credit. The liability for off-balance sheet credit exposure related to loan commitments and other credit guarantees is included in other liabilities on the Consolidated Balance Sheet.
Acquired Loans, Covered Loans and Related Loss Share Receivable	Acquired Loans, FDIC acquired loans, covered and Related Loss Share Receivable Acquired loans (nonimpaired and impaired) are initially measured at fair value as of the acquisition date. The fair value estimates for acquired loans are based on the estimate of expected cash flows, both principal and interest and prepayments, discounted at prevailing market interest rates. Credit discounts representing the principal losses expected over the life of the loan are also a component of the initial fair value; therefore, an allowance for loan losses is not recorded at the acquisition date. The Corporation evaluates acquired loans for impairment in accordance with the provisions of ASC 310-30. Acquired loans are considered impaired if there is evidence of credit deterioration since origination and if it is probable at time of acquisition that all contractually required payments will not be collected. In determining the acquisition date fair value of acquired impaired loans, and in subsequent accounting, the Corporation generally aggregates impaired loans into pools of loans with common characteristics. Each pool is accounted for as a single asset with one composite interest rate and an aggregate expectation of cash flows. Expected cash flows at the acquisition date in excess of the fair value of the loans is referred to as the accretable yield and recorded as interest income over the life of the loans. Acquired impaired loans are not classified as nonaccrual or nonperforming as they are considered to be accruing loans because their interest income relates to the accretable yield recognized at the pool level and not to contractual interest payments at the loan level. Subsequent to the acquisition date, increases in expected cash flows will generally result in a recovery of any previously recorded ALL, to the extent applicable, and/or a reclassification from the nonaccretable difference to accretable yield, which will be recognized prospectively. The present value of any decreases in expected cash flows after the acquisition date will generally result in an impairment charge recorded as a provision for loan losses, resulting in an increase to the ALL, net of any expected reimbursement under FDIC Loss Share Agreements, to the extent applicable. Revolving loans, including lines of credit and credit cards loans, and leases are excluded from acquired impaired loan accounting. For acquired nonimpaired loans, the difference between the acquisition date fair value and the contractual amounts due at the acquisition date represents the fair value adjustment. Fair value adjustments may be discounts (or premiums) to a loan’s cost basis and are accreted (or amortized) to interest income over the loan’s remaining life using the level yield method. Subsequent to the acquisition date, the method utilized to estimate the required allowance for loan losses for these loans is similar to originated loans, however, the Corporation records an allowance for loan losses only when the required allowance, net of any expected reimbursement under any FDIC Loss Share Agreements, to the extent applicable, exceeds the remaining fair value adjustment. Acquired nonimpaired loans are reported net of the unamortized fair value adjustment. Nonimpaired acquired loans are placed on nonaccrual status and reported as nonperforming or past due using the same criteria applied to the originated portfolio. Loans acquired in FDIC assisted transactions and covered under FDIC Loss Share Agreements are referred to as covered loans. Covered loans are recorded at fair value at the date of acquisition exclusive of the FDIC Loss Share Agreements. No allowance for loan losses related to covered loans is recorded on the acquisition date as the fair value of the loans acquired incorporates assumptions regarding credit risk. The covered loans are subsequently valued and accounted for in the same manner as the acquired loans disclosed above. A loss share receivable is recorded at the acquisition date which represents the estimated fair value of reimbursement the Corporation expects to receive from the FDIC for incurred losses on certain covered loans. The fair value measurement reflects counterparty credit risk and other uncertainties. The loss share receivable continues to be measured on the same basis as the related indemnified loans. Deterioration in the credit quality of the loans (recorded as an adjustment to the allowance for covered loan losses) would immediately increase the basis of the loss share receivable, with the offset recorded through the consolidated statement of comprehensive income. Increases in the credit quality or cash flows of loans (reflected as an adjustment to yield and accreted into income over the remaining life of the loans) decrease the basis of the loss share receivable, with such decrease being accreted into income over 1) the same period or 2) the life of the loss share agreements, whichever is shorter. Loss assumptions used in the basis of the loss share receivable are consistent with the loss assumptions used to measure the related covered loans. Upon the determination of an incurred loss the loss share receivable will be reduced by the amount owed by the FDIC. A corresponding claim receivable is recorded in accrued interest receivable and other assets on the Consolidated Balance Sheet until cash is received from the FDIC. FDIC acquired loans are loans acquired in FDIC assisted transactions for which the FDIC loss share agreement has expired. FDIC acquired loans are subsequently valued and accounted for in the same manner as the acquired loans disclosed above, with the exception that there is no offsetting loss share receivable. An acquired, FDIC acquired or covered loan may be resolved either through receipt of payment (in full or in part) from the borrower, the sale of the loan to a third party, or foreclosure of the collateral. In the period of resolution of a nonimpaired loan, any remaining unamortized fair value adjustment is recognized as interest income. In the period of resolution of an impaired loan accounted for on an individual basis, the difference between the carrying amount of the loan and the proceeds received is recognized as a gain or loss within noninterest income. The majority of impaired loans are accounted for within a pool of loans which results in any difference between the proceeds received and the loan carrying amount being deferred as part of the carrying amount of the pool. The accretable amount of the pool remains unaffected from the resolution until the subsequent quarterly cash flow re-estimation. Favorable results from removal of the resolved loan from the pool increase the future accretable yield of the pool, while unfavorable results are recorded as impairment in the quarter of the cash flow re-estimation. Acquired, FDIC acquired or covered impaired loans subject to modification are not removed from a pool even if those loans would otherwise be deemed TDRs as the pool, and not the individual loan, represents the unit of account. For further discussion of the Corporation’s acquisitions and loan accounting, see Note 3 ( Loans ), and Note 4 ( Allowance for Loan Losses ).
Equipment Lease Financing	Equipment Lease Financing The Corporation leases equipment directly to customers. The net investment in financing leases includes the aggregate amount of lease payments to be received and the estimated residual values of the equipment, less unearned income. Income from lease financing is recognized over the lives of the leases on an approximate level rate of return on the unrecovered investment. The residual value represents the estimated fair value of the leased asset at the end of the lease term. Unguaranteed residual values of leased assets are reviewed at least annually for impairment. Declines in residual values determined to be other-than-temporary are recognized in earnings in the period such determinations are made.
Mortgage Servicing Rights	Mortgage Servicing Rights The Corporation periodically sells residential real estate loans while retaining the rights and obligations to perform the servicing of such loans. Whenever the Corporation undertakes an obligation to service such loans, Management assesses whether a servicing asset or liability should be recognized. A servicing asset is recognized whenever the compensation for servicing is expected to exceed servicing costs. Likewise, a servicing liability would be recognized in the event that servicing fees to be received are not expected to adequately compensate the Corporation for its expected cost. Servicing assets associated with retained mortgage servicing rights are presented within other assets on the balance sheet. The Corporation does not presently have any servicing liabilities. MSRs are initially valued at fair value. Servicing assets and liabilities are subsequently measured using the amortization method which requires servicing rights to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. Amortization is recorded in loan sales and servicing income in the Consolidated Statement of Income. At each reporting period, MSRs are assessed for impairment based on fair value of those rights on a stratum-by-stratum basis. The Corporation stratifies its servicing rights portfolio into tranches based on loan type and interest rate, the predominant risk characteristics of the underlying loans. Any impairment is recognized through a valuation allowance for each impaired stratum through a charge to income. If the Corporation later determines that all or a portion of the impairment no longer exists for a particular grouping, a reduction of the allowance may be recorded as an increase to income. The Corporation also reviews MSRs for OTTI each quarter and recognizes a direct write-down when the recoverability of a recorded allowance for impairment is determined to be remote. Unlike an allowance for impairment, a direct write-down permanently reduces the unamortized cost of the MSR and the allowance for impairment. MSRs do not trade in an active open market with readily observable market prices. Although sales of MSRs do occur, the exact terms and conditions may not be available. As a result, the fair value of MSRs is estimated using discounted cash flow modeling techniques which require Management to make assumptions regarding future net servicing income, adjusted for such factors as net servicing income, discount rate and prepayments. The primary assumptions used in determining the current fair value of the Corporation’s MSRs as well as a sensitivity analysis are presented in Note 6 ( Mortgage Servicing Rights and Mortgage Servicing Activity ). The Corporation generally records loan administration fees for servicing loans for investors on the accrual basis of accounting. Servicing fees and late fees related to delinquent loan payments are also recorded on the accrual basis of accounting.
Depreciation and Amortization	Depreciation and Amortization Premises and equipment are reported at cost less accumulated depreciation and amortization and principally depreciated using the straight-line method over their estimated useful lives. Estimated useful lives for furniture and equipment range from three to 15 years, and depreciable buildings ranges from 10 to 35 years. Amortization of leasehold improvements is computed on the straight-line method based on related lease terms or the estimated useful lives of the assets of up to 15 years, whichever is shorter. The Corporation purchases, as well as internally develops and customizes, certain software to enhance or perform internal business functions. Software development costs incurred in the planning and post-development project stages are charged to noninterest expense. Costs associated with designing software configuration and interfaces, installation, coding programs and testing systems are capitalized and amortized using the straight-line method over periods ranging from three to seven years.
Goodwill and Intangible Assets	Goodwill and Other Intangible Assets Goodwill represents the amount by which the cost of net assets acquired in a business combination exceeds their fair value. Goodwill is evaluated for impairment on an annual basis or whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The goodwill impairment test is a two-step process. The first step compares the reporting unit’s estimated fair values, including goodwill, to its carrying amount. If the carrying amount exceeds its fair value, then goodwill impairment may be indicated. The second step allocates the reporting units fair value to its assets and liabilities. If the unallocated fair value does not exceed the carrying amount of goodwill then an impairment loss would be recognized as a charge to earnings. Other intangible assets represent the present value of the future stream of income to be derived from the purchase of core deposits and trust relationships. Other intangible assets are amortized on an accelerated basis over their estimated useful lives. Goodwill and other intangible assets deemed to have indefinite lives are not amortized.
Other Real Estate Owned	Other Real Estate Owned Other real estate owned is included in other assets in the consolidated balance sheets and is primarily comprised of property acquired through loan foreclosure proceedings or acceptance of a deed-in-lieu of foreclosures, and loans classified as in-substance foreclosure. Other real estate owned is recorded at the lower of the recorded investment in the loan at the time of transfer or the fair value of the underlying property collateral, less estimated selling costs. Any write-down in the carrying value of a property at the time of acquisition is charged to the allowance for loan losses. Any subsequent write-downs to reflect current fair market value, as well as gains and losses on disposition and revenues and expenses incurred in maintaining such properties, are treated as period costs. Other real estate owned also includes bank premises formerly but no longer used for banking. Banking premises are transferred at the lower of carrying value or estimated fair value, less estimated selling costs.
Derivative Instruments and Hedging Activites	Derivative Instruments and Hedging Activities The Corporation uses interest rate swaps, interest rate lock commitments and forward contracts sold to hedge interest rate risk for asset and liability management purposes. Foreign exchange derivatives are entered into to accommodate the needs of customers. All derivatives are recorded as either other assets or other liabilities at fair value. Credit risk associated with derivatives is reflected in the fair values recorded for those positions. Accounting for changes in fair value (i.e., gains or losses) of derivatives differs depending on whether the derivative has been designated and qualifies as part of a hedging relationship, and further, on the type of hedging relationship. For derivatives that are not designated as hedging instruments, the gain or loss is recognized immediately in other operating income. A derivative that is designated and qualifies as a hedging instrument must be designated a fair value hedge, a cash flow hedge or a hedge of a net investment in a foreign operation. The Corporation does not have any cash flow hedges or derivatives that hedge net investments in foreign operations. Effectiveness measures the extent to which changes in the fair value of a derivative instrument offset changes in the fair value of the hedged item. If the relationship between the change in the fair value of the derivative instrument and the fair value of the hedged item falls within a range considered to be the industry norm, the hedge is considered highly-effective and qualifies for hedge accounting. A hedge is ineffective if the offsetting difference between the fair values falls outside the acceptable range. A fair value hedge is used to limit exposure to changes in the fair value of existing assets, liabilities and firm commitments caused by changes in interest rates or other economic factors. The Corporation recognizes the gain or loss on these derivatives, as well as the related gain or loss on the underlying hedged item, in earnings during the period in which the fair value changes. If a hedge is perfectly effective, the change in the fair value of the hedged item will be offset, resulting in no net effect on earnings. A cash flow hedge is used to minimize the variability of future cash flows that is caused by changes in interest rates or other economic factors. The effective portion of a gain or loss on any cash flow hedge is reported as a component of accumulated other comprehensive income (loss) and reclassified into other operating income in the same period or periods that the hedged transaction affects earnings. Any ineffective portion of the derivative gain or loss is recognized in other operating income during the current period. The Corporation enters into commitments to originate mortgage loans whereby the interest rate on the prospective loan is determined prior to funding (rate lock commitments). Rate lock commitments on mortgage loans that are intended to be sold are considered to be derivatives. Accordingly, such commitments, along with any related fees received from potential borrowers, are recorded at fair value as derivative assets or liabilities, with changes in fair value recorded in net gain or loss on sale of mortgage loans.
Income Taxes	Income Taxes Management evaluates two components of income tax expense: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period as adjusted by prior year provision to return adjustments. Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between the carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. The Corporation follows the asset and liability method of accounting for income taxes. Deferred income taxes are recognized for the tax consequences of “temporary differences” by applying enacted statutory tax rates applicable to future years to differences between the financial statement carrying amounts and the tax bases of existing assets and liabilities. The effect of a change in tax rates is recognized in income in the period of enactment date. In assessing the realizability of deferred tax assets, Management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. Assessing the need for, or the sufficiency of, a valuation allowance requires Management to evaluate all available evidence, both negative and positive, including the recent trend of quarterly earnings. Positive evidence necessary to overcome the negative evidence includes whether future taxable income in sufficient amounts and character within the carryback and carryforward periods is available under the tax law, including the use of tax planning strategies. When negative evidence (e.g., cumulative losses in recent years, history of operating loss or tax credit carryforwards expiring unused) exists, more positive evidence than negative evidence will be necessary. Additional information regarding income taxes is included in Note 12 ( Income Taxes ).
Treasury Stock	Treasury Stock Treasury stock is accounted for using the cost method in which reacquired shares reduce outstanding Common Stock and capital surplus. At the date of subsequent reissue, the treasury stock account is reduced by the cost of such stock on the last-in, first-out basis.
Per Share Data	Per Share Data Basic net income per common share is calculated using the two-class method to determine income attributable to common shareholders. The two-class method is an earnings allocation formula that determines earnings per share for each share of common stock and participating securities according to dividends declared (distributed earnings) and participation rights in undistributed earnings. Distributed and undistributed earnings are allocated between common and participating security shareholders based on their respective rights to receive dividends. Unvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents are considered participating securities (i.e., nonvested restricted stock). Undistributed net losses are not allocated to nonvested restricted shareholders, as these shareholders do not have a contractual obligation to fund the losses incurred by the Corporation. 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. For the diluted calculation, the weighted-average number of shares of Common Stock outstanding by the assumed conversion of outstanding convertible preferred stock from the beginning of the year or date of issuance, if later, and the number of shares of Common Stock that would be issued assuming the exercise of stock options and warrants using the treasury stock method. The treasury stock method assumes that the Corporation uses the proceeds from a hypothetical exercise of any options and warrants to repurchase Common Stock at the average market price during the period. These adjustments to the weighted-average number of shares of Common Stock outstanding are made only when such adjustments will dilute earnings per common share. All earnings per share disclosures appearing in these financial statements, related notes and management’s discussion and analysis, are computed assuming dilution unless otherwise indicated. The Corporation’s earnings per share calculations are illustrated in Note 20 ( Shareholders' Equity ) under the heading “Earnings per Share.”
Trust Department Assets and Income	Trust Department Assets and Income Property held by the Corporation in a fiduciary or other capacity for trust customers is not included in the accompanying consolidated financial statements, since such items are not assets of the Corporation. Trust department income is reported on the accrual basis of accounting.
Share-Based Compensation	Share-Based Compensation The Corporation’s share-based compensation plans are described in detail in Note 14 ( Share-Based Compensation ). The Corporation recognizes share-based compensation expense using the straight-line method over the requisite service period for all stock awards, including those with graded vesting, and reduced by assumed forfeitures. The requisite service period is the period an employee is required to provide service in order to vest in the award, which cannot extend beyond the date at which the employee is no longer required to perform any service to receive the share-based compensation (the retirement-eligible date). Certain awards are contingent upon performance conditions, which affect the number of awards ultimately granted. The Corporation periodically evaluates the probable outcome of the performance conditions and makes cumulative adjustments to compensation expense as appropriate.
Pension and Other Postretirement Plans	Pension and Other Postretirement Plans Pension and other postretirement costs are based on assumptions concerning future events that will affect the amount and timing of required benefit payments under the Corporation’s plans. These assumptions include demographic assumptions such as retirement age and mortality, a compensation rate increase, a discount rate used to determine the current benefit obligation and a long-term expected rate of return on plan assets. Net periodic benefit cost includes service and interest cost based on the assumed discount rate, an expected return on plan assets based on an actuarially derived market-related value and amortization of prior service cost and net actuarial gains or losses. The amortization of any prior service costs is determined using a straight line amortization of the cost over the average remaining lifetime of participants expected to receive benefits under the plans. Actuarial gains and losses include the impact of plan amendments and various unrecognized gains and losses, which are deferred and amortized over the future service periods of active employees. The overfunded or underfunded status of the plans is recorded as an asset or liability, respectively, in the Consolidated Balance Sheet, with changes in that status recognized through other comprehensive income. Additional information about pension and other postretirement plans is included in Note 13 ( Benefit Plans ).
Revenue Recognition	Revenue Recognition The Corporation recognizes revenues as they are earned based on contractual terms, as transactions occur, or as services are provided and collectability is reasonably assured. The Corporation’s principal source of revenue is interest income, which is recognized on an accrual basis primarily according to nondiscretionary formulas in written contracts, such as loan agreements or securities contracts.
Fair Value Measurement	Fair Value Measurement Fair value is defined as the price to sell an asset or transfer a liability in an orderly transaction between market participants. It represents an exit price at the measurement date. Market participants are buyers and sellers, who are independent, knowledgeable, and willing and able to transact in the principal (or most advantageous) market for the asset or liability being measured. Current market conditions, including imbalances between supply and demand, are considered in determining fair value. The Corporation values its assets and liabilities in the principal market where it sells the particular asset or transfers the liability with the greatest volume and level of activity. In the absence of a principal market, the valuation is based on the most advantageous market for the asset or liability (i.e., the market where the asset could be sold or the liability transferred at a price that maximizes the amount to be received for the asset or minimizes the amount to be paid to transfer the liability). In measuring the fair value of an asset, the Corporation assumes the highest and best use of the asset by a market participant to maximize the value of the asset, and does not consider the intended use of the asset. When measuring the fair value of a liability, the Corporation assumes that the nonperformance risk associated with the liability is the same before and after the transfer. Nonperformance risk is the risk that an obligation will not be satisfied and encompasses not only the Corporation’s own credit risk (i.e., the risk that the Corporation will fail to meet its obligation), but also other risks such as settlement risk. The Corporation considers the effect of its own credit risk on the fair value for any period in which fair value is measured. There are three acceptable valuation techniques that can be used to measure fair value: the market approach, the income approach and the cost approach. Selection of the appropriate technique for valuing a particular asset or liability takes into consideration the exit market, the nature of the asset or liability being valued, and how a market participant would value the same asset or liability. Ultimately, determination of the appropriate valuation method requires significant judgment, and sufficient knowledge and expertise are required to apply the valuation techniques. Valuation inputs refer to the assumptions market participants would use in pricing a given asset or liability using one of the three valuation techniques. Inputs can be observable or unobservable. Observable inputs are those assumptions which market participants would use in pricing the particular asset or liability. These inputs are based on market data and are obtained from a source independent of the Corporation. Unobservable inputs are assumptions based on the Corporation’s own information or estimate of assumptions used by market participants in pricing the asset or liability. Unobservable inputs are based on the best and most current information available on the measurement date. All inputs, whether observable or unobservable, are ranked in accordance with a prescribed fair value hierarchy which gives the highest ranking to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest ranking to unobservable inputs (Level 3). Fair values for assets or liabilities classified as Level 2 are based on one or a combination of the following factors: (i) quoted prices for similar assets; (ii) observable inputs for the asset or liability, such as interest rates or yield curves; or (iii) inputs derived principally from or corroborated by observable market data. The level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Corporation considers an input to be significant if it drives 10% or more of the total fair value of a particular asset or liability. Assets and liabilities are considered to be fair valued on a recurring basis if fair value is measured regularly (i.e., daily, weekly, monthly or quarterly). Recurring valuation occurs at a minimum on the measurement date. Assets and liabilities are considered to be fair valued on a nonrecurring basis if the fair value measurement of the instrument does not necessarily result in a change in the amount recorded on the balance sheet. Generally, nonrecurring valuation is the result of the application of other accounting pronouncements which require assets or liabilities to be assessed for impairment or recorded at the lower of cost or fair value. The fair value of assets or liabilities transferred in or out of Level 3 is measured on the transfer date, with any additional changes in fair value subsequent to the transfer considered to be realized or unrealized gains or losses. Additional information regarding fair value measurements is provided in Note 17 ( Fair Value Measurement ).
Reclassifications	Reclassifications Certain reclassifications of prior years’ amounts have been made to conform to current year presentation. Such reclassifications had no effect on prior year net income or shareholders’ equity.
New Adopted and Issued Accounting Standards	Recently Adopted Accounting Standards FASB ASU 2015-10, Technical Corrections and Improvemen ts. The amendments in this update cover a wide range of Topics in the Codification. The amendments in this update represent changes to clarify the Codification, correct unintended application of guidance, or make minor improvements to the accounting guidance and are not expected to have a significant effect on current accounting practice or create a significant administrative cost to most entities. Additionally, some of these amendments will make the accounting guidance easier to understand and eliminate inconsistencies. The ASU is effective immediately. The adoption of this accounting guidance did not have a material effect on the Corporation’s financial position or results of operations. FASB ASU 2015-8, Business Combinations (Topic 805): Pushdown Accounting—Amendments to SEC Paragraphs Pursuant to Staff Accounting Bulletin No. 115 (SEC Update). The amendments in the SEC Update conform the accounting guidance with the various SEC paragraphs pursuance to the SEC Staff Accounting Bulletin No. 115. The SEC Update is effective immediately. The adoption of this accounting guidance did not have a material effect on the Corporation’s financial position or results of operations. FASB ASU 2015-3, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The amendments in ASU 2015-03, require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from that debt liability, consistent with the presentation of a debt discount. An entity should apply the new guidance on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. The recognition and measurement guidance for debt issuance costs are not affected by the amendments in this ASU. For public business entities, these amendments are effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years, and early adoption is permitted. An entity should apply the new guidance on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. Upon transition, an entity is required to comply with the applicable disclosures for a change in an accounting principle. As of June 30, 2015, the Corporation adopted this accounting standard by classifying $3.7 million of deferred debt issuance costs as a deduction to long term debt. Management concluded that the classification of debt issuance costs capitalized in prior periods was immaterial as a component of other assets, total assets, total long term debt, and total liabilities. As such, the Corporation's comparative periods have not been recasted. The amount of unamortized debt issuance costs not recasted are $3.7 million as of December 31, 2014. FASB ASU 2014-14, Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure —a consensus of the FASB Emerging Issues Task Force. The objective of this update is to reduce diversity in practice by addressing the classification of certain foreclosed mortgage loans held by creditors that are either fully or partially guaranteed under government programs. The amendments in this update require that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if the following conditions are met: 1) the loan has a government guarantee that is not separable from the loan before foreclosure; 2) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim; and 3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The ASU is effective for interim and annual periods beginning after December 15, 2014. The amendments can be adopted using either a prospective transition method or a modified retrospective transition method. The adoption of this accounting guidance did not have a material effect on the Corporation’s financial position or results of operations. FASB ASU 2014-11, Transfers and Servicing: Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures . The amendments in this update require entities to account for repurchase-to-maturity transactions as secured borrowings (rather than as sales with forward repurchase agreements), eliminate accounting guidance on linking repurchase financing transactions, and expand disclosure requirements related to certain transfers of financial assets that are accounted for as sales and certain transfers, such as repos, securities lending transactions, and repurchase-to-maturity transactions, accounted for as secured borrowings. The amendments in ASU 2014-11 are effective for the first interim or annual period beginning after December 15, 2014. The amendments must present changes in accounting for transactions outstanding on the effective date as a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. Early application is prohibited. The adoption of this accounting guidance did not have a material effect on the Corporation’s financial position or results of operations. FASB ASU 2014-08, Presentation of Financial Statements and Property, Plant, and Equipment: Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. The amendments in this update change the definition of a discontinued operation in ASC 205-20 and require additional disclosures for transactions that meet the definition of a discontinued operation and certain other significant transactions that do not meet the discontinued operations criteria. The amendments in ASU 2014-08 are effective prospectively for all disposals, except disposals classified as held for sale before the adoption date or components initially classified as held for sale in periods beginning on or after December 15, 2014, with early adoption permitted. The adoption of this accounting guidance did not have a material effect on the Corporation’s financial position or results of operations. FASB ASU 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. ASU 2014-04 amends the guidance in ASC 310-40 by clarifying when an in-substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan. Additionally, the amendments require interim and annual disclosure of both 1) the amount of foreclosed residential real estate property held by the creditor and 2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The amendments in ASU 2014-04 are effective for annual periods, and interim period within those annual periods, beginning after December 15, 2014. The amendments can either be adopted using a modified retrospective or a prospective transition method. The adoption of this accounting guidance did not have a material effect on the Corporation’s financial position or results of operations. FASB ASU 2014-01, Accounting for Investments in Qualified Affordable Housing Projects. The amendments in ASU 2014-01 do not change the existing accounting methods, but permit reporting entities to make an accounting policy election to account for their investments in qualified affordable projects using the proportional amortization method, if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The amendments in ASU 2014-01 are effective for annual periods and interim reporting periods within those annual periods, beginning after December 15, 2014, and should be applied retrospectively to all periods presented. The Corporation early adopted ASU 2014-01 in the first quarter of 2014. Amortization of the initial investment cost of qualifying projects is now recorded in the provision for income taxes together with the tax credits and benefits received. Previously, the amortization was recorded as other noninterest expense. All prior period amounts have been restated to reflect the adoption of the amendment, which resulted in an offsetting decrease to other noninterest expense and increase to the provision for income taxes of approximately $3.1 million for the year ended December 31, 2013 . (aa) Recently Issued Accounting Standards 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 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 should 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 is not expected to 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 is not expected to 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 is not expected to have a material effect on the Corporation's financial position or results of operations. FASB ASU 2014–12, Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved After the Requisite Service Period — a consensus of the FASB Emerging Issues Task Force. The amendments in this update clarify that entities should treat performance targets that can be met after the requisite service period of a share-based payment award as performance conditions that affect vesting. Therefore, an entity would not record compensation expense (measured as of the grant date without taking into account the effect of the performance target) related to an award for which transfer to the employee is contingent on the entity’s satisfaction of a performance target until it becomes probable that the performance target will be met. The ASU does not contain any new disclosure requirements. The ASU is effective for interim and annual reporting periods beginning after December 15, 2015. Early adoption is permitted. In addition, entities will have the option of applying the guidance either prospectively (i.e., only to awards granted or modified on or after the effective date) or retrospectively. Retrospective application would only apply to awards with performance targets outstanding at or after the beginning of the first annual period presented (i.e., the earliest presented comparative period). The 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 proposed updates to certain aspects of the guidance. 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 (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2015
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. December 31, 2015 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available-for-sale Debt securities: U.S. treasury bonds & notes $ 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 Nonagency 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 December 31, 2014 (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 $ — $ (18 ) $ 2,482 U.S. states and political subdivisions 221,052 6,756 (466 ) 227,342 Residential mortgage-backed securities: U.S. government agencies 951,839 22,377 (3,218 ) 970,998 Commercial mortgage-backed securities: U.S. government agencies 104,176 598 (1,371 ) 103,403 Residential collateralized mortgage-backed securities: U.S. government agencies 1,698,015 4,777 (26,225 ) 1,676,567 Nonagency 7 — — 7 Commercial collateralized mortgage-backed securities: U.S. government agencies 222,876 863 (1,405 ) 222,334 Asset-backed securities: Collateralized loan obligations 297,446 11 (9,613 ) 287,844 Corporate debt securities 61,652 — (10,315 ) 51,337 Total debt securities 3,559,563 35,382 (52,631 ) 3,542,314 Equity Securities Marketable equity securities 2,974 — — 2,974 Total equity securities 2,974 — — 2,974 Total securities available for sale $ 3,562,537 $ 35,382 $ (52,631 ) $ 3,545,288 Securities held-to-maturity Debt securities U.S. treasury notes & bonds $ 5,000 $ — $ — $ 5,000 U.S. government agency debentures 25,000 — (537 ) 24,463 U.S. states and political subdivisions 517,824 12,645 (191 ) 530,278 Residential mortgage-backed securities: U.S. government agencies 580,727 7,495 (3,045 ) 585,177 Commercial mortgage-backed securities: U.S. government agencies 58,143 281 (329 ) 58,095 Residential collateralized mortgage-backed securities: U.S. government agencies 1,368,534 718 (38,875 ) 1,330,377 Commercial collateralized mortgage-backed securities: U.S. government agencies 257,642 557 (6,768 ) 251,431 Corporate debt securities 90,739 412 (52 ) 91,099 Total securities held to maturity $ 2,903,609 $ 22,108 $ (49,797 ) $ 2,875,920
Schedule of general obligation bonds	As illustrated in the tables below, the aggregate fair value of the Corporation’s general obligation bonds was greater than $10 million in 11 of the 37 U.S. states in which it holds investments. (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) December 31, 2014 U.S. State # of Issuers Average Issue Size, Fair Value Amortized Cost Fair Value Michigan 169 $ 842 $ 138,325 $ 142,292 Ohio 137 979 130,741 134,127 Illinois 66 1,897 121,560 125,169 Wisconsin 77 841 62,543 64,776 Texas 64 801 50,307 51,293 Pennsylvania 45 1,000 44,443 45,006 Washington 30 952 27,987 28,558 Minnesota 42 674 27,740 28,326 New Jersey 37 746 26,755 27,612 Missouri 19 1,011 18,764 19,207 New York 19 628 11,659 11,929 Other 120 650 76,849 78,020 Total general obligation bonds 825 $ 917 $ 737,673 $ 756,315
Schedule of other investments	FRB and FHLB stock constitute the majority of other investments on the Consolidated Balance Sheet. December 31, (In thousands) 2015 2014 FRB stock $ 56,083 $ 55,681 FHLB stock 91,714 92,547 Other 375 426 Total other investments $ 148,172 $ 148,654
Schedule of Realized Gain (Loss)	The following table presents the proceeds from sales of available-for-sale securities and 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. Year Ended December 31, (In thousands) 2015 2014 2013 Realized gains $ 2,608 $ 382 $ 3,786 Realized losses (1,651 ) (216 ) (6,589 ) Net securities (losses)/gains $ 957 $ 166 $ (2,803 )
Unrealized Gain (Loss) on Investments	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. 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 Securities Fair Value Unrealized Losses Securities available-for-sale Debt Securities U.S. government agency debentures $ 2,498 $ (2 ) 1 $ — $ — — $ 2,498 $ (2 ) U.S. treasury notes & bonds 5,000 (1 ) 1 — — — 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 — — — 52,229 (9,481 ) 8 52,229 (9,481 ) Total available-for-sale securities $ 1,849,320 $ (19,569 ) 180 $ 913,649 $ (37,458 ) 91 $ 2,762,969 $ (57,027 ) Securities held-to-maturity Debt Securities U.S. government agency debentures $ — $ — — $ — $ — — $ — $ — 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 — — — 19,243 (22 ) Total held-to-maturity securities $ 370,605 $ (2,916 ) 58 $ 1,171,297 $ (40,433 ) 79 $ 1,541,902 $ (43,349 ) December 31, 2014 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.government agency debentures $ 2,482 $ (18 ) 1 $ — $ — — $ 2,482 $ (18 ) U.S. states and political subdivisions 5,637 (11 ) 11 22,528 (455 ) 36 28,165 (466 ) Residential mortgage-backed securities: U.S. government agencies 50,126 (182 ) 5 199,773 (3,036 ) 14 249,899 (3,218 ) Commercial mortgage-backed securities: U.S. government agencies 12,284 (55 ) 2 45,485 (1,316 ) 6 57,769 (1,371 ) Residential collateralized mortgage-backed securities: U.S. government agencies 243,970 (906 ) 15 905,478 (25,319 ) 64 1,149,448 (26,225 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 31,375 (229 ) 4 67,169 (1,176 ) 7 98,544 (1,405 ) Asset-backed securities: Collateralized loan obligations 79,042 (1,406 ) 15 193,687 (8,207 ) 27 272,729 (9,613 ) Corporate debt securities — — — 51,338 (10,315 ) 8 51,338 (10,315 ) Total available-for-sale securities $ 424,916 $ (2,807 ) 53 $ 1,485,458 $ (49,824 ) 162 $ 1,910,374 $ (52,631 ) Securities held-to-maturity Debt securities: U.S. government agency debentures $ — $ — $ — $ 24,463 $ (537 ) 1 $ 24,463 $ (537 ) U.S. states and political subdivisions 9,085 (17 ) 9 18,371 (174 ) 21 27,456 (191 ) Residential mortgage-backed securities: U.S. government agencies — — 0 185,361 (3,045 ) 10 185,361 (3,045 ) Commercial mortgage-backed securities: U.S. government agencies 9,950 (4 ) 2 16,735 (325 ) 2 26,685 (329 ) Residential collateralized mortgage-backed securities: U.S. government agencies 28,333 (149 ) 3 1,161,297 (38,726 ) 58 1,189,630 (38,875 ) Commercial collateralized mortgage-backed securities: U.S. government agencies 41,474 (55 ) 3 171,570 (6,713 ) 16 213,044 (6,768 ) Corporate debt securities 36,933 (52 ) 13 — — 0 36,933 (52 ) Total held-to-maturity securities $ 125,775 $ (277 ) 30 $ 1,577,797 $ (49,520 ) 108 $ 1,703,572 $ (49,797 )
Investment Securities Maturities	December 31, 2015 (Dollars in thousands) U.S. Government agency debentures U.S. Treasuries U.S. States and political subdivisions obligations Residential mortgage-backed securities - U.S. govt. agency obligations Commercial mortgage-backed securities - U.S. govt. agency obligations Residential collateralized mortgage obligations - U.S. govt. agency obligations Residential collateralized mortgage obligations - non- U.S. govt. agency issued Commercial collateralized mortgage obligations - U.S. govt. agency obligations Collateralized loan obligations Corporate debt securities Total Weighted Average Yield Securities Available for Sale Remaining maturity: One year or less $ — $ 5,000 $ 8,640 $ — $ — $ — $ — $ — $ — $ — $ 13,640 1.99 % Over one year through five years 2,498 — 78,968 37,010 14,825 10,922 4 46,105 — — 190,332 3.84 % Over five years through ten years — — 83,928 71,478 136,728 23,697 — 67,299 207,480 — 590,610 3.02 % Over ten years — — 21,259 797,741 20,556 2,093,701 — 102,915 81,931 52,229 3,170,332 2.09 % Fair Value $ 2,498 $ 5,000 $ 192,795 $ 906,229 $ 172,109 $ 2,128,320 $ 4 $ 216,319 $ 289,411 $ 52,229 $ 3,964,914 2.31 % Amortized Cost $ 2,500 $ 5,001 $ 188,829 $ 900,358 $ 173,912 $ 2,155,808 $ 4 $ 217,008 $ 297,831 $ 61,710 $ 4,002,961 Weighted-Average Yield 1.25 % 0.28 % 5.19 % 2.39 % 2.03 % 2.04 % 3.07 % 2.11 % 2.77 % 1.24 % 2.31 % Weighted-Average Maturity (in years) 2.42 — 2.17 3.78 4.52 3.89 0.90 4.00 6.51 11.81 4.13 Securities Held to Maturity Remaining maturity: One year or less $ — $ — $ 63,383 $ — $ — $ — $ — $ — $ — $ — $ 63,383 1.99 % Over one year through five years 25,019 — 144,134 — 35,953 — — 79,833 — 88,139 373,078 2.34 % Over five years through ten years — — 216,331 23,421 28,718 — — 41,190 — — 309,660 3.79 % Over ten years — — 169,808 486,255 — 1,125,534 — 131,401 — — 1,912,998 2.12 % Fair Value $ 25,019 $ — $ 593,656 $ 509,676 $ 64,671 $ 1,125,534 $ — $ 252,424 $ — $ 88,139 $ 2,659,119 2.33 % Amortized Cost $ 25,000 $ — $ 571,738 $ 507,908 $ 64,951 $ 1,161,340 $ — $ 255,359 $ — $ 87,797 $ 2,674,093 Weighted-Average Yield 1.43 % — % 4.01 % 2.15 % 2.55 % 1.60 % — % 2.34 % — % 2.28 % 2.33 % Weighted-Average Maturity (in years) 0.08 — 4.83 4.04 2.91 3.76 — 4.04 — 2.02 3.96

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Total originated, acquired and covered loans outstanding table	Loans outstanding as of December 31, 2015 and 2014 , net of unearned income, consisted of the following: (In thousands) December 31, 2015 December 31, 2014 Originated loans: Commercial $ 9,007,830 $ 8,200,264 Residential mortgage 689,045 625,283 Installment 2,990,349 2,393,451 Home equity 1,248,438 1,110,336 Credit cards 182,843 164,478 Total originated loans 14,118,505 12,493,812 Allowance for originated loan losses (105,135 ) (95,696 ) Net originated loans $ 14,013,370 $ 12,398,116 Acquired loans: Commercial $ 677,149 $ 1,086,899 Residential mortgage 324,008 394,484 Installment 573,372 764,168 Home equity 168,542 233,629 Total acquired loans 1,743,071 2,479,180 Allowance for acquired loan losses (3,877 ) (7,457 ) Net acquired loans $ 1,739,194 $ 2,471,723 FDIC acquired loans: Commercial 129,109 211,607 Residential mortgage 35,568 41,276 Installment 2,077 4,874 Home equity 38,668 73,365 Loss share receivable 9,947 22,033 Total FDIC acquired loans 215,369 353,155 Allowance for FDIC acquired loan losses (44,679 ) (40,496 ) Net FDIC acquired loans $ 170,690 $ 312,659 Total loans: Commercial $ 9,814,088 $ 9,498,770 Residential mortgage 1,048,621 1,061,043 Installment 3,565,798 3,162,493 Home equity 1,455,648 1,417,330 Credit cards 182,843 164,478 Loss share receivable 9,947 22,033 Total loans 16,076,945 15,326,147 Total allowance for loan losses (153,691 ) (143,649 ) Total Net loans $ 15,923,254 $ 15,182,498
Summary of loans to related parties table	Loan activity with related parties for the years ended December 31, 2015 , 2014 , and 2013 is summarized as follows: Years Ended December 31, (In thousands) 2015 2014 2013 Aggregate amount at beginning of year $ 20,682 $ 24,536 $ 16,578 New loans 5,365 2,534 11,507 Repayments (5,619 ) (6,388 ) (4,374 ) Changes in directors and their affiliations — — 825 Aggregate amount at end of year $ 20,428 $ 20,682 $ 24,536
Changes in the Carrying Amount of Accretable Yield for Acquired Impaired Loans [Table Text Block]	Changes in the carrying amount and accretable yield for acquired impaired loans were as follows for the years ended December 31, 2015 and 2014 : Years Ended Acquired Impaired Loans December 31, 2015 December 31, 2014 (In thousands) Accretable Yield Carrying Amount of Loans Accretable Yield Carrying Amount of Loans Balance at beginning of period $ 119,450 $ 423,209 $ 136,646 $ 601,000 Accretion (40,756 ) 40,756 (49,271 ) 49,271 Net reclassifications from nonaccretable to accretable 37,245 — 45,824 — Payments received, net — (179,256 ) — (227,062 ) Disposals (26,116 ) — (13,749 ) — Balance at end of period $ 89,823 $ 284,709 $ 119,450 $ 423,209
Changes in Loss Share Receivable Associated with Covered Loans	Changes in the loss share receivable for the years ended December 31, 2015 and 2014 , respectively, were as follows: Loss Share Receivable Years Ended (In thousands) December 31, 2015 December 31, 2014 Balance at beginning of period $ 22,033 $ 61,827 Amortization (4,141 ) (20,943 ) Increase due to impairment on FDIC acquired loans 6,373 2,920 FDIC reimbursement (13,795 ) (17,837 ) FDIC acquired loans paid in full (523 ) (3,934 ) Balance at end of period (1) $ 9,947 $ 22,033 (1) As of December 31, 2015 , the loss share receivable of $9.9 million was related to single family covered loans.
Changes in Carrying Amount of Accretable Yield for Covered Impaired Loans	Changes in the carrying amount and accretable yield for FDIC acquired impaired loans were as follows for the years ended December 31, 2015 and 2014 : Years Ended December 31, FDIC Acquired Impaired Loans 2015 2014 (In thousands) Accretable Yield Carrying Loans Accretable Yield Carrying Loans Balance at beginning of period $ 37,511 $ 232,452 $ 67,282 $ 403,692 Accretion (14,947 ) 14,947 (42,161 ) 42,161 Net reclassifications from nonaccretable to accretable 4,818 — 16,841 — Payments received, net — (116,751 ) — (213,401 ) (Disposals)/Additions (4,474 ) — (4,451 ) — Balance at end of period $ 22,908 $ 130,648 $ 37,511 $ 232,452
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 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 originated loans $ 51,358 $ 7,869 $ 24,293 $ 83,520 $ 14,034,985 $ 14,118,505 $ 8,022 $ 44,105 ≥ 90 Days Acquired Loans Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans 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 acquired loans $ 18,687 $ 4,268 $ 22,752 $ 45,707 $ 1,697,364 $ 1,743,071 $ 3,096 $ 8,245 ≥ 90 Days FDIC Acquired Loans (2) 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 FDIC acquired loans $ 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 December 31, 2014 (In thousands) ≥ 90 Days Originated Loans Days Past Due Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (1) Loans Commercial C&I $ 2,212 $ 1,162 $ 2,670 $ 6,044 $ 5,169,157 $ 5,175,201 $ 1,547 $ 6,114 CRE 2,155 1,460 8,864 12,479 2,104,639 2,117,118 1,696 11,033 Construction — — — — 537,766 537,766 — — Leases — — — — 370,179 370,179 — — Consumer Installment 14,621 3,647 4,716 22,984 2,370,467 2,393,451 3,695 3,268 Home equity lines 1,357 587 1,206 3,150 1,107,186 1,110,336 569 1,654 Credit cards 668 516 860 2,044 162,434 164,478 407 596 Residential mortgages 12,086 2,744 8,013 22,843 602,440 625,283 4,242 11,952 Total $ 33,099 $ 10,116 $ 26,329 $ 69,544 $ 12,424,268 $ 12,493,812 $ 12,156 $ 34,617 ≥ 90 Days Acquired Loans Total Total Past Due and Nonaccrual 30-59 60-89 ≥ 90 Past Due Current Loans Accruing (3) Loans Commercial C&I $ 92 $ 234 $ 4,791 $ 5,117 $ 444,137 $ 449,254 $ — $ 787 CRE 3,479 3,398 23,509 30,386 600,288 630,674 44 4,171 Construction — — 685 685 6,286 6,971 — — Consumer Installment 6,204 2,029 1,861 10,094 754,074 764,168 615 1,218 Home equity lines 2,819 2,123 2,333 7,275 226,354 233,629 1,519 631 Residential mortgages 13,062 1,648 7,089 21,799 372,685 394,484 1,293 1,249 Total $ 25,656 $ 9,432 $ 40,268 $ 75,356 $ 2,403,824 $ 2,479,180 $ 3,471 $ 8,056 FDIC Acquired Loans (2) 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 $ 58 $ — $ 6,041 $ 6,099 $ 42,738 $ 48,837 n/a n/a CRE 234 1,517 47,233 48,984 104,524 153,508 n/a n/a Construction — — 6,064 6,064 3,198 9,262 n/a n/a Consumer Installment 23 — 34 57 4,817 4,874 n/a n/a Home equity lines 1,395 870 3,859 6,124 67,241 73,365 n/a n/a Residential mortgages 6,205 91 3,572 9,868 31,408 41,276 n/a n/a Total $ 7,915 $ 2,478 $ 66,803 $ 77,196 $ 253,926 $ 331,122 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 December 31, 2014 . (2) Excludes loss share receivable of $22.0 million as of December 31, 2014 . (3) Acquired and FDIC acquired impaired loans were not classified as nonperforming assets at December 31, 2014 as the loans are considered to be performing under ASC 310-30. As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cash flows, is being recognized on all acquired and 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 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 December 31, 2014 (In thousands) Originated Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 52,676 $ 683 $ 678 $ 4,451 $ 58,488 Grade 2 186,278 3,454 — 14,959 204,691 Grade 3 1,340,100 294,281 46,074 71,908 1,752,363 Grade 4 3,413,446 1,745,470 490,757 277,277 5,926,950 Grade 5 139,083 29,990 257 1,389 170,719 Grade 6 43,618 43,240 — 195 87,053 Grade 7 — — — — — Total $ 5,175,201 $ 2,117,118 $ 537,766 $ 370,179 $ 8,200,264 Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ 1,076 $ — $ — $ — $ 1,076 Grade 2 — — — — — Grade 3 20,891 24,867 — — 45,758 Grade 4 376,129 532,447 6,286 — 914,862 Grade 5 23,268 28,382 685 — 52,335 Grade 6 27,890 44,978 — — 72,868 Grade 7 — — — — — Total $ 449,254 $ 630,674 $ 6,971 $ — $ 1,086,899 FDIC Acquired Loans Commercial C&I CRE Construction Leases Total Grade 1 $ — $ — $ — $ — $ — Grade 2 1,347 — — — 1,347 Grade 3 — — — — — Grade 4 36,406 86,779 823 — 124,008 Grade 5 167 3,401 — — 3,568 Grade 6 10,917 63,328 8,248 — 82,493 Grade 7 — — 191 — 191 Total $ 48,837 $ 153,508 $ 9,262 $ — $ 211,607

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Schedule of Credit Losses Related to Financing Receivables, Current and Non-Current	The following tables show activity in the originated ALL, by portfolio segment for the years ended December 31, 2015 , 2014 and 2013 , as well as the corresponding recorded investment in originated loans at the end of the period: As of December 31, 2015 (In thousands) Originated Loans C&I CRE Construction Leases Installment Home Equity Lines Credit Cards Residential Mortgages Total Year 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 (14,913 ) (625 ) — (1,268 ) (21,630 ) (4,032 ) (4,867 ) (1,443 ) (48,778 ) Recoveries 1,196 517 178 787 11,547 2,606 1,395 257 18,483 Provision for loan losses 21,102 (753 ) (786 ) 1,120 11,348 2,196 4,337 1,170 39,734 Allowance for originated loan losses, ending balance $ 44,760 $ 9,631 $ 1,594 $ 1,313 $ 14,183 $ 20,094 $ 8,831 $ 4,729 $ 105,135 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: Originated loans individually evaluated for impairment $ 43,818 $ 16,614 $ — $ — $ 36,904 $ 7,080 $ 717 $ 23,905 $ 129,038 Originated 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 originated loans $ 5,793,408 $ 2,077,344 $ 645,337 $ 491,741 $ 2,990,349 $ 1,248,438 $ 182,843 $ 689,045 $ 14,118,505 As of December 31, 2014 (In thousands) Originated Loans C&I CRE Construction Leases Installment Home Equity Lines Credit Cards Residential Mortgages Total Year ended Allowance for originated loan losses, beginning balance $ 42,981 $ 12,265 $ 2,810 $ 1,081 $ 11,935 $ 12,900 $ 7,740 $ 4,772 $ 96,484 Charge-offs (9,617 ) (3,512 ) — — (20,328 ) (4,831 ) (4,604 ) (2,031 ) (44,923 ) Recoveries 3,872 515 39 379 11,185 2,940 1,716 318 20,964 Provision for loan losses 139 1,224 (647 ) (786 ) 10,126 8,315 3,114 1,686 23,171 Allowance for originated loan losses, ending balance $ 37,375 $ 10,492 $ 2,202 $ 674 $ 12,918 $ 19,324 $ 7,966 $ 4,745 $ 95,696 Ending allowance for originated loan losses balance attributable to loans: Individually evaluated for impairment $ 72 $ 2,914 $ — $ — $ 1,178 $ 207 $ 296 $ 1,283 $ 5,950 Collectively evaluated for impairment 37,303 7,578 2,202 674 11,740 19,117 7,670 3,462 89,746 Total ending allowance for originated loan losses balance $ 37,375 $ 10,492 $ 2,202 $ 674 $ 12,918 $ 19,324 $ 7,966 $ 4,745 $ 95,696 Originated loans: Originated loans individually evaluated for impairment $ 11,759 $ 23,300 $ — $ — $ 24,905 $ 7,379 $ 854 $ 25,251 $ 93,448 Originated loans collectively evaluated for impairment 5,163,442 2,093,818 537,766 370,179 2,368,546 1,102,957 163,624 600,032 12,400,364 Total ending originated loan balance $ 5,175,201 $ 2,117,118 $ 537,766 $ 370,179 $ 2,393,451 $ 1,110,336 $ 164,478 $ 625,283 $ 12,493,812 As of December 31, 2013 (In thousands) Originated Loans C&I CRE Construction Leases Installment Home Equity Lines Credit Cards Residential Mortgages Total Year ended Allowance for originated loan losses, beginning balance $ 36,209 $ 20,126 $ 3,821 $ 639 $ 11,154 $ 13,724 $ 7,384 $ 5,885 $ 98,942 Charge-offs (5,840 ) (1,281 ) (516 ) (1,237 ) (16,683 ) (7,172 ) (5,541 ) (1,903 ) (40,173 ) Recoveries 7,981 524 507 100 10,519 2,979 1,841 230 24,681 Provision for loan losses 4,631 (7,104 ) (1,002 ) 1,579 6,945 3,369 4,056 560 13,034 Allowance for originated loan losses, ending balance $ 42,981 $ 12,265 $ 2,810 $ 1,081 $ 11,935 $ 12,900 $ 7,740 $ 4,772 $ 96,484 Ending allowance for originated loan losses balance attributable to loans: Individually evaluated for impairment $ 3,235 $ 229 $ — $ — $ 1,014 $ 223 $ 312 $ 1,133 $ 6,146 Collectively evaluated for impairment 39,746 12,036 2,810 1,081 10,921 12,677 7,428 3,639 90,338 Total ending allowance for originated loan losses balance $ 42,981 $ 12,265 $ 2,810 $ 1,081 $ 11,935 $ 12,900 $ 7,740 $ 4,772 $ 96,484 Originated loans: Originated loans individually evaluated for impairment $ 8,053 $ 20,616 $ 906 $ — $ 27,285 $ 6,726 $ 1,112 $ 23,066 $ 87,764 Originated loans collectively evaluated for impairment 4,131,514 2,149,171 338,019 239,551 1,700,640 913,340 147,201 506,187 10,125,623 Total ending originated loan balance $ 4,139,567 $ 2,169,787 $ 338,925 $ 239,551 $ 1,727,925 $ 920,066 $ 148,313 $ 529,253 $ 10,213,387
Schedule of Credit Losses Financing Receivables Acquired Loans	The following table presents activity in the allowance for acquired impaired loan losses for the years ended December 31, 2015 , 2014 and 2013 : Allowance for Acquired Impaired Loan Losses Years Ended December 31, (In thousands) 2015 2014 2013 Balance at beginning of the period $ 7,457 $ 741 $ — Charge-offs — — — Recoveries — — — Provision/(recapture) for loan losses (3,580 ) 6,716 741 Balance at end of the period $ 3,877 $ 7,457 $ 741
Schedule of Credit Losses Related to Covered FInancing Receivables, Current	The following table presents activity in the allowance for FDIC acquired impaired loan losses for the years ended December 31, 2015 , 2014 , and 2013 : Allowance for FDIC Acquired Impaired Loan Losses Years Ended December 31, (In thousands) 2015 2014 2013 Balance at beginning of the period $ 40,496 $ 44,027 $ 43,255 Net provision/(recapture) for loan losses before benefit attributable to FDIC loss share agreements 8,830 10,568 23,892 Net (benefit)/recapture attributable to FDIC loss share agreements (6,373 ) (2,920 ) (10,790 ) Net provision/(recapture) for loan losses 2,457 7,648 13,102 Increase/(decrease) in loss share receivable 6,373 2,920 10,790 Loans charged-off (4,647 ) (14,099 ) (23,120 ) Balance at end of the period $ 44,679 $ 40,496 $ 44,027
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 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 December 31, 2014 Originated Loans Unpaid Average Recorded Principal Related Recorded (In thousands) Investment Balance Allowance Investment Impaired loans with no related allowance Commercial C&I $ 11,451 $ 18,207 $ — $ 14,193 CRE 16,874 22,696 — 18,027 Construction — — — — Consumer Installment 4,460 4,584 — 4,272 Home equity line 1,723 1,754 — 1,792 Credit card 16 16 — 32 Residential mortgages 12,204 15,119 — 12,425 Subtotal 46,728 62,376 — 50,741 Impaired loans with a related allowance Commercial C&I 308 344 72 326 CRE 6,426 6,440 2,914 4,497 Construction — — — — Consumer Installment 20,445 21,024 1,178 19,513 Home equity line 5,656 5,875 207 5,944 Credit card 838 838 296 966 Residential mortgages 13,047 13,158 1,283 13,121 Subtotal 46,720 47,679 5,950 44,367 Total impaired loans $ 93,448 $ 110,055 $ 5,950 $ 95,108 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 December 31, 2015 , and 2014 . 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 Construction — — — 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 December 31, 2014 (Dollars in thousands) Number of Loans Recorded Investment Unpaid Principal Balance Originated loans Commercial C&I 41 $ 7,123 $ 13,887 CRE 67 17,607 22,645 Construction 31 — — Total originated commercial 139 24,730 36,532 Consumer Installment 1,205 24,905 25,608 Home equity lines 270 7,379 7,629 Credit card 238 854 854 Residential mortgages 315 25,251 28,277 Total originated consumer 2,028 58,389 62,368 Total originated loans 2,167 $ 83,119 $ 98,900 Acquired Loans Commercial C&I 2 $ 18 $ 19 CRE 3 2,542 2,595 Total acquired commercial 5 2,560 2,614 Consumer Installment 40 975 1,054 Home equity lines 145 6,932 6,983 Residential mortgages 26 1,633 1,823 Total acquired consumer 211 9,540 9,860 Total acquired loans 216 $ 12,100 $ 12,474 FDIC acquired loans Commercial C&I 8 $ 177 $ 1,589 CRE 24 25,499 42,226 Construction 9 339 9,552 Total FDIC acquired commercial 41 26,015 53,367 Consumer Home equity lines 68 8,890 8,901 Residential Mortgages 2 334 334 Total FDIC acquired consumer 70 9,224 9,235 Total FDIC acquired loans 111 $ 35,239 $ 62,602 Total loans Commercial C&I 51 $ 7,318 $ 15,495 CRE 94 45,648 67,466 Construction 40 339 9,552 Total commercial 185 53,305 92,513 Consumer Installment 1,245 25,880 26,662 Home equity lines 483 23,201 23,513 Credit card 238 854 854 Residential mortgages 343 27,218 30,434 Total consumer 2,309 77,153 81,463 Total loans 2,494 $ 130,458 $ 173,976 Note 1: For originated loans, the differences between the recorded investment and unpaid principal balance amounts represent partial charge offs.
Accruing and Nonaccruing Troubled Debt Restructurings	The following tables provide a summary of the delinquency status of TDRs along with the specific allowance for loan loss, by loan type, as of December 31, 2015 and 2014 , including TDRs that continue to accrue interest and TDRs included in nonperforming assets. 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 Construction — — — — — — — — 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 December 31, 2014 Accruing TDRs Nonaccruing TDRs Total Total (In thousands) Current Delinquent Total Current Delinquent Total TDRs Allowance Originated loans Commercial C&I $ 6,740 $ — $ 6,740 $ — $ 383 $ 383 $ 7,123 $ 72 CRE 12,885 952 13,837 394 3,376 3,770 17,607 159 Construction — — — — — — — — Total originated commercial 19,625 952 20,577 394 3,759 4,153 24,730 231 Consumer Installment 22,254 726 22,980 1,663 262 1,925 24,905 1,178 Home equity lines 6,239 269 6,508 871 — 871 7,379 207 Credit card 775 60 835 15 4 19 854 296 Residential mortgages 13,440 3,538 16,978 5,006 3,267 8,273 25,251 1,283 Total originated consumer 42,708 4,593 47,301 7,555 3,533 11,088 58,389 2,964 Total originated TDRs $ 62,333 $ 5,545 $ 67,878 $ 7,949 $ 7,292 $ 15,241 $ 83,119 $ 3,195 Acquired loans Commercial C&I $ 15 $ — $ 15 $ 3 $ — $ 3 $ 18 $ 18 CRE — — — 978 1,564 2,542 2,542 134 Total acquired commercial 15 — 15 981 1,564 2,545 2,560 152 Consumer Installment 841 87 928 24 23 47 975 65 Home equity lines 6,186 607 6,793 139 — 139 6,932 9 Residential mortgages 868 — 868 470 295 765 1,633 2 Total acquired consumer 7,895 694 8,589 633 318 951 9,540 76 Total acquired TDRs $ 7,910 $ 694 $ 8,604 $ 1,614 $ 1,882 $ 3,496 $ 12,100 $ 228 FDIC acquired loans Commercial C&I $ — $ 177 $ 177 $ — $ — $ — $ 177 $ — CRE 5,123 20,376 25,499 — — — 25,499 2,879 Construction 339 — 339 — — — 339 295 Total FDIC acquired commercial 5,462 20,553 26,015 — — — 26,015 3,174 Consumer Home equity lines 8,561 — 8,561 329 — 329 8,890 27 Residential mortgages 334 — 334 — — — 334 21 Total FDIC acquired consumer 8,895 — 8,895 329 — 329 9,224 48 Total FDIC acquired TDRs $ 14,357 $ 20,553 $ 34,910 $ 329 $ — $ 329 $ 35,239 $ 3,222 Total loans Commercial C&I $ 6,755 $ 177 $ 6,932 $ 3 $ 383 $ 386 $ 7,318 $ 90 CRE 18,008 21,328 39,336 1,372 4,940 6,312 45,648 3,172 Construction 339 — 339 — — — 339 295 Total commercial 25,102 21,505 46,607 1,375 5,323 6,698 53,305 3,557 Consumer Installment 23,095 813 23,908 1,687 285 1,972 25,880 1,243 Home equity lines 20,986 876 21,862 1,339 — 1,339 23,201 243 Credit card 775 60 835 15 4 19 854 296 Residential mortgages 14,642 3,538 18,180 5,476 3,562 9,038 27,218 1,306 Total consumer 59,498 5,287 64,785 8,517 3,851 12,368 77,153 3,088 Total TDRs $ 84,600 $ 26,792 $ 111,392 $ 9,892 $ 9,174 $ 19,066 $ 130,458 $ 6,645
Schedule of Debtor Troubled Debt Restructuring, Current Period	The following table provides the number of loans modified in a TDR during the previous 12 months that subsequently defaulted during the years ended December 31, 2015 and 2014 , as well as the amount defaulted in these restructured loans as of December 31, 2015 and 2014 . As of December 31, 2015 (Dollars in thousands) Number of Loans Amount Defaulted Originated loans Commercial C&I — $ — CRE — — Construction — — Total originated commercial — — Consumer Installment 8 113 Home equity lines — — Credit card 10 51 Residential mortgages — — Total originated consumer 18 $ 164 FDIC acquired loans Commercial C&I — $ — CRE — — Construction — — Total FDIC acquired commercial — $ — Acquired loans Consumer Installment 2 $ 61 Home equity lines 1 105 Residential mortgages — — Total acquired consumer 3 $ 166 Total loans Commercial C&I — $ — CRE — — Construction — — Total commercial — — Consumer Installment 10 174 Home equity lines 2 348 Credit card 10 51 Residential mortgages — — Total consumer 22 573 Total 22 $ 573 As of December 31, 2014 (Dollars in thousands) Number of Loans Amount Defaulted Originated loans Commercial C&I 3 $ 4,930 CRE 1 363 Construction — — Total originated commercial 4 5,293 Consumer Installment 11 40 Home equity lines 1 29 Credit card 28 140 Residential mortgages 3 183 Total originated consumer 43 $ 392 FDIC acquired loans Commercial C&I 1 $ 427 CRE — — Construction — — Total FDIC acquired commercial 1 $ 427 Acquired loans Consumer Installment 2 165 Home equity lines 1 61 Residential mortgages — — Total acquired consumer 3 $ 226 Total loans Commercial C&I 4 $ 5,357 CRE 1 363 Construction — — Total commercial 5 5,720 Consumer Installment 13 205 Home equity lines 2 90 Credit card 28 140 Residential mortgages 3 183 Total consumer 46 618 Total 51 $ 6,338

Goodwill and Other Intangible36

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The following table shows goodwill allocated by business segment. (In thousands) Commercial Retail Wealth Total Balance at December 31, 2014 $ 527,406 $ 193,961 $ 20,373 $ 741,740 Balance at December 31, 2015 $ 527,406 $ 193,961 $ 20,373 $ 741,740
Schedule of Finite-Lived Intangible Assets	The following tables show the gross carrying amount, accumulated amortization, and net carrying amount of these intangible assets. 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 Total intangibles $ 96,561 $ (35,933 ) $ 60,628 December 31, 2014 Gross Carrying Accumulated Net Carrying (In thousands) Amount Amortization Amount Core deposit intangibles (1) $ 82,323 $ (19,996 ) $ 62,327 Lease intangible 238 (176 ) 62 Trust relationships (2) 14,000 (5,369 ) 8,631 Total intangibles $ 96,561 $ (25,541 ) $ 71,020 (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 .
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The following table shows the estimated future amortization expense for intangible assets subject to amortization as of December 31, 2015 . (In thousands) For the years ended: December 31, 2016 $ 9,209 December 31, 2017 8,161 December 31, 2018 7,273 December 31, 2019 6,500 December 31, 2020 5,214 Total estimated future amortization $ 36,357

Mortgage Servicing Rights and37

Mortgage Servicing Rights and Mortgage Servicing Activity (Tables)	12 Months Ended
	Dec. 31, 2015
Transfers and Servicing [Abstract]
Changes in the carrying amount of mortgage servicing rights	Changes in the carrying amount of MSRs and the MSR valuation allowance are as follows: Year Ended December 31, (In thousands) 2015 2014 2013 Balance at beginning of period $ 22,011 $ 22,760 $ 21,316 Addition of Citizens’ MSRs on Acquisition Date — — 1,065 Additions 619 3,049 4,952 Amortization (3,693 ) (3,798 ) (4,573 ) Balance at end of period 18,937 22,011 22,760 Valuation allowance at beginning of period (955 ) (282 ) (2,564 ) Recoveries (Additions) 556 (673 ) 2,282 Valuation Allowance at end of period (399 ) (955 ) (282 ) MSRs, net carrying balance $ 18,538 $ 21,056 $ 22,478 Fair value at end of period $ 19,149 $ 21,228 $ 23,041
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) 10.93 % Decrease in fair value from 10% adverse change $ 1,032 Decrease in fair value from 25% adverse change $ 1,292 Discount rate assumption 9.39 % Decrease in fair value from 100 basis point adverse change $ 599 Decrease in fair value from 200 basis point adverse change $ 1,155 Expected weighted-average life (in months) 97.6
Estimated amortization expense for mortgage servicing rights	The following table shows the estimated future amortization for net MSRs as of December 31, 2015 : (In thousands) Year Ended December 31, 2016 $ 3,075 2017 2,723 2018 2,281 2019 1,917 2020 1,608 more than 5 years 6,934 Total estimated future amortization $ 18,538

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Schedule of Premises and Equipment	The components of premises and equipment are as follows: As of December 31, Estimated (In thousands) 2015 2014 useful lives Land $ 57,040 $ 60,397 - Buildings 309,754 308,144 10-35 yrs Equipment 182,385 176,906 3-15 yrs Leasehold improvements 24,765 25,151 1-20 yrs Software 116,280 103,782 3-7 yrs 690,224 674,380 Less accumulated depreciation and amortization 370,736 342,083 Total premises and equipment $ 319,488 $ 332,297

Certificates and Other Time D39

Certificates and Other Time Deposits (Tables)	12 Months Ended
	Dec. 31, 2015
Time Deposits [Abstract]
Maturities of Certificates and Other Time Deposits	Maturities of certificates and other time deposits as of December 31, 2015 are as follows: (In thousands) For the year ended December 31, 2016 $ 1,525,838 2017 407,919 2018 124,610 2019 103,921 2020 73,131 2021 and after 3,484 Total certificates and other time deposits $ 2,238,903

Federal Funds Purchased and S40

Federal Funds Purchased and Securities Sold Under Agreements to Repurchase (Tables)	12 Months Ended
	Dec. 31, 2015
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Schedule Of Federal Funds Purchased And Securities Sold Under Agreements To Repurchase And Wholesale Borrowings	The following table presents federal funds purchased and securities sold under agreements to repurchase as of December 31, 2015 and 2014 . As of December 31, (In thousands) 2015 2014 Federal funds purchased and securities sold under agreements to repurchase $ 1,037,075 $ 1,272,591 The following table presents wholesale borrowings and long-term debt as of December 31, 2015 and 2014 . As of December 31, (In thousands) 2015 2014 FHLB advances $ 580,501 $ 427,857 Subordinated debentures 505,173 505,192 Other 147 214 Total borrowed funds $ 1,085,821 $ 933,263
Schedule Of Select Financial Data Federal Funds Purchased And Securities Sold Under Agreements To Repurchase And Wholesale Borrowings	Selected financial statement information pertaining to the securities sold under agreements to repurchase is as follows: As of December 31, (Dollars in thousands) 2015 2014 2013 Average balance during the year $ 1,138,307 $ 1,084,532 $ 949,068 Weighted-average annual interest rate during the year 0.10 % 0.09 % 0.13 % Maximum month-end balance $ 1,519,250 $ 1,289,460 $ 1,123,795

Borrowed Funds (Tables)

Borrowed Funds (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Schedule Of Federal Funds Purchased And Securities Sold Under Agreements To Repurchase And Wholesale Borrowings	The following table presents federal funds purchased and securities sold under agreements to repurchase as of December 31, 2015 and 2014 . As of December 31, (In thousands) 2015 2014 Federal funds purchased and securities sold under agreements to repurchase $ 1,037,075 $ 1,272,591 The following table presents wholesale borrowings and long-term debt as of December 31, 2015 and 2014 . As of December 31, (In thousands) 2015 2014 FHLB advances $ 580,501 $ 427,857 Subordinated debentures 505,173 505,192 Other 147 214 Total borrowed funds $ 1,085,821 $ 933,263
Schedule of Select Financial Data Wholesale Borrowings	Selected financial statement information pertaining to the Corporation’s borrowed funds is as follows: As of December 31, (Dollars in thousands) 2015 2014 2013 Average balance during the year $ 885,478 $ 715,383 $ 474,473 Weighted-average annual interest rate during the year 2.35 % 2.80 % 3.62 % Maximum month-end balance $ 1,189,093 $ 973,453 $ 527,155
Schedule Of Contractual Maturities Of Federal Funds Purchased And Securities Sold Under Agreements To Repurchase And Wholesale Borrowings	The following table illustrates the contractual maturities of the Corporation's borrowed funds at December 31, 2015 : One Year One to Three to Over Five (In thousands) or Less Three Years Five Years Years Total FHLB advances $ 310,716 $ 230,193 $ — $ 39,592 $ 580,501 Subordinated debentures — — — 505,173 505,173 Other 71 76 — — 147 Total borrowed funds $ 310,787 $ 230,269 $ — $ 544,765 $ 1,085,821

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	Income tax expense is comprised of the following: Year Ended December 31, (In thousands) 2015 2014 2013 Taxes currently payable Federal $ 52,869 $ 52,514 $ 24,426 State (3,119 ) 4,763 3,496 Deferred expense 47,269 44,666 51,585 Total income tax expense $ 97,019 $ 101,943 $ 79,507
Schedule of Effective Income Tax Rate Reconciliation	The actual income tax rate differs from the statutory tax rate as shown in the following table: Year Ended December 31, 2015 2014 2013 Statutory rate 35.00 % 35.00 % 35.00 % Increase (decrease) in rate due to: Interest on tax-exempt securities and tax-free loans, net (2.75 ) (2.77 ) (3.16 ) Merger expenses at acquisition — — 0.54 Reduction in excess tax reserves — — 0.11 Bank owned life insurance (1.76 ) (2.10 ) (2.53 ) State income tax (net) 0.59 0.91 0.87 Tax credits (0.82 ) (0.96 ) (1.06 ) ESOP Dividends (0.14 ) (0.13 ) (0.14 ) Nondeductible meals and entertainment 0.25 0.22 0.27 Other (0.66 ) (0.18 ) 0.31 Effective tax rates 29.71 % 29.99 % 30.21 %
Schedule of Deferred Tax Assets and Liabilities	Principal components of the Corporation’s net deferred tax asset are summarized as follows: Year Ended December 31, (In thousands) 2015 2014 Deferred tax assets: Allowance for credit losses $ 40,069 $ 35,760 Employee benefits 50,868 51,584 Real Estate Mortgage Investment Credit 3,791 4,831 Acquired liabilities 5,931 6,296 Acquired loans 25,388 51,701 Available for sale securities 11,475 3,862 Loan fees and expenses — — Federal NOL carryforwards 102,194 131,195 Alternative minimum tax credit carryforward 112,861 83,428 General business tax credit carryforward 2,924 1,982 State income tax (net of federal benefit) 2,441 1,970 Other 1,789 467 Total deferred tax assets 359,731 373,076 Deferred tax liabilities: Leased assets and depreciation (41,649 ) (24,699 ) FHLB stock (18,641 ) (18,165 ) Loan fees and expenses (1,480 ) (2,537 ) Goodwill (26,885 ) (16,580 ) Core deposit intangibles (18,697 ) (22,013 ) Other — — Total deferred tax liabilities (107,352 ) (83,994 ) Total net deferred tax asset $ 252,379 $ 289,082
Change in Deferred Taxes	The period change in deferred taxes recorded both directly to shareholders’ equity and as a part of the income tax expense is summarized as follows: Year Ended December 31, (In thousands) 2015 2014 Deferred tax changes reflected in other comprehensive income $ (10,565 ) $ (2,698 ) Deferred tax changes reflected in Federal income tax expense 47,269 44,666 Net decrease/(increase) in DTA $ 36,704 $ 41,968
Summary of Income Tax Contingencies	A reconciliation of the change in the reserve for uncertain tax positions for 2015 and 2014 is as follows: (In thousands) Federal and State Tax Accrued Penalties Gross Unrecognized Income Tax Benefits Balance as of January 1, 2015 $ 305 $ 19 $ 324 Additions for tax provisions related to prior year 299 17 316 Reduction for tax positions related to prior year due closed tax years — — — Reduction for tax positions related to prior tax years (134 ) — (134 ) Balance at December 31, 2015 $ 470 $ 36 $ 506 Components of Reserve: State income tax exposure $ 470 $ 36 $ 506 Balance at December 31, 2015 $ 470 $ 36 $ 506 (In thousands) Federal and State Tax Accrued Penalties Gross Unrecognized Income Tax Benefits Balance as of January 1, 2014 $ 1,003 $ 262 $ 1,265 Additions for tax provisions related to prior year 798 14 812 Reduction for tax positions related to prior year due closed tax years (31 ) (3 ) (34 ) Reduction for tax positions related to prior tax years (1,465 ) (254 ) (1,719 ) Balance at December 31, 2014 $ 305 $ 19 $ 324 Components of Reserve: State income tax exposure $ 305 $ 19 $ 324 Balance at December 31, 2014 $ 305 $ 19 $ 324

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Schedule of Net Benefit Costs	The combined components of net periodic pension and postretirement benefits and other amounts recognized in AOCI for the Corporation's pension and postretirement benefit plans as of December 31, 2015 , 2014 and 2013 , are as follows: Pension Benefits Postretirement Benefits (In thousands) 2015 2014 2013 2015 2014 2013 Net periodic cost consists of: Service cost $ 830 $ 728 $ 2,339 $ 165 $ 65 $ 99 Interest cost 14,069 14,337 12,814 575 655 563 Expected return on plan assets (15,607 ) (16,035 ) (14,938 ) — — — Amortization of prior service cost/(credit) 2,279 2,599 467 (639 ) (468 ) (468 ) Amortization of actuarial (gains)/losses 4,227 2,930 4,693 325 236 268 Settlement / curtailment income — — (524 ) — — — Net periodic cost (benefit) 5,798 4,559 4,851 426 488 462 Other changes in plan assets and benefit obligations recognized in Other comprehensive income: Current year actuarial losses/(gains) 7,987 49,488 (47,257 ) (8,103 ) 64 (682 ) Amortization of actuarial gains/(losses) (4,227 ) (2,930 ) (4,169 ) (325 ) (236 ) (268 ) Amortization of prior service (cost)/credit (2,279 ) (2,599 ) (467 ) 639 468 468 Total recognized in AOCI, before income taxes 1,481 43,959 (51,893 ) (7,789 ) 296 (482 ) Total recognized in net periodic cost and AOCI $ 7,279 $ 48,518 $ (47,042 ) $ (7,363 ) $ 784 $ (20 )
Schedule of Net Funded Status	The following table sets forth a reconciliation of the changes in the projected benefit obligation for the Corporation’s pension and postretirement benefit plans as of December 31, 2015 , and 2014 , as well as the change in plan assets for the Corporation’s qualified pension plans: Pension Benefits Postretirement Benefits (In thousands) 2015 2014 2015 2014 Accumulated benefit obligation, end of year $ 339,661 $ 354,402 Change in projected benefit obligation: Projected benefit obligation, beginning of year 355,642 308,834 $ 15,164 $ 15,544 Service cost 830 728 165 65 Interest cost 14,069 14,337 575 655 Plan amendments — — (7,657 ) (1,979 ) Participant contributions — — 1,805 1,851 Actuarial (gains)/losses and change in assumptions (10,469 ) 50,115 (446 ) 2,046 Benefits paid (19,252 ) (18,372 ) (2,765 ) (3,018 ) Projected benefit obligation, end of year $ 340,820 $ 355,642 $ 6,841 $ 15,164 Change in plan assets, at fair value: Fair value of plan assets, beginning of year $ 257,355 $ 257,510 $ — $ — Actual return on plan assets (2,849 ) 16,663 — — Participant contributions — — 1,805 1,851 Employer contributions 1,527 1,554 960 1,167 Benefits paid (19,252 ) (18,372 ) (2,765 ) (3,018 ) Fair value of plan assets, end of year $ 236,781 $ 257,355 $ — $ — Funded status (1) (104,039 ) (98,287 ) (6,841 ) (15,164 ) Amounts recognized in AOCI before income taxes: Prior service cost (credit) $ 308 $ 2,587 $ (12,389 ) $ (5,370 ) Net actuarial loss 103,477 99,715 4,364 5,138 Amount recognized in AOCI $ 103,785 $ 102,302 $ (8,025 ) $ (232 ) (1) The Corporation recognizes the underfunded status of the plans in accrued taxes, expenses and other liabilities on the Consolidated Balance Sheet.
Schedule of Assumptions Used	The actuarial assumptions used to determine year end obligations for the Corporation’s pension and postretirement plans were as follows: Weighted-average assumptions for year end obligations 2015 2014 2013 Discount rate Qualified pensions 4.57 % 4.19 % 4.99 % Nonqualified pensions 3.99 % 3.61 % 4.12 % Postretirement medical benefits, FirstMerit’s plan 1.76 % 3.50 % 4.01 % Postretirement medical benefits, Citizens’ plan 1.77 % 3.61 % 3.98 % Postretirement life insurance benefits 4.79 % 4.36 % 5.08 % Expected long-term rate of return 6.00 % 6.50 % 6.75 % Rate of compensation increase Qualified pensions na na na Nonqualified pensions 3.75 % 3.75 % 3.75 % Assumed health care cost trend rate, pre-65 (1) (2) Initial trend na 7.00 % 7.50 % Ultimate trend na 5.00 % 5.00 % Year ultimate trend reached na 2019 2019 Assumed health care cost trend rate, post-65 (1) (2) Initial trend na 11.00 % 11.50 % Ultimate trend na 5.00 % 5.00 % Year ultimate trend reached na 2027 2027 Prescription Drugs (2) Initial trend na 7.00 % 7.50 % Ultimate trend na 5.00 % 5.00 % Year ultimate trend reached na 2019 2019 (1) The health care cost trend assumptions relate only to the postretirement benefit plans. Increasing or decreasing the assumed health care cost trend rates by one percentage point each future year would not have a material impact on total service and interest cost or the year end benefit obligation. (2) Employer-provided subsidies under the postretirement medical plan will be discontinued after 2018. As a result, a three-year sunset of this subsidized coverage is reflected in the December 31, 2015 disclosures. Since employer subsidies are not expected to change from current levels, health care trend rates no longer have any impact on the accounting liabilities. The actuarial assumptions used as of the beginning of the year to determine the net periodic costs for the Corporation’s pension and postretirement plans were as follows: Weighted-average assumptions for benefit cost at beginning of year 2015 2014 2013 Discount rate Qualified pension 4.19 % 4.99 % 4.21 % Nonqualified pensions 3.61 % 4.12 % 4.21 % Postretirement medical benefits 3.50 % 4.01 % 3.18 % Postretirement life insurance benefits 4.36 % 5.08 % 4.30 % Expected long-term rate of return 6.50 % 6.75 % 7.00 % Rate of compensation increase Qualified pension na na na Nonqualified pensions 3.75 % 3.75 % 3.75 % Assumed health care cost trend rate, pre-65 (1) Initial trend 7.00 % 7.50 % 8.00 % Ultimate trend 5.00 % 5.00 % 5.00 % Year ultimate trend reached 2019 2019 2019 Assumed health care cost trend rate, post-65 (1) Initial trend 11.50 % 11.50 % 12.00 % Ultimate trend 5.00 % 5.00 % 5.00 % Year ultimate trend reached 2027 2027 2027 Prescription Drugs Initial trend 7.50 % 7.50 % 8.00 % Ultimate trend 5.00 % 5.00 % 5.00 % Year ultimate trend reached 2019 2019 2019 (1) The health care cost trend assumptions relate only to the postretirement benefit plans. Increasing or decreasing the assumed health care cost trend rates by one percentage point each future year would not have a material impact on total service and interest cost or the year end benefit obligation
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year	The amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost (credit) during the next fiscal year are as follows: (In thousands) Pension Postretirement Total Prior service cost/(credit) $ 300 $ (2,542 ) $ (2,242 ) Actuarial net loss 3,321 981 4,302
Schedule of Expected Benefit Payments	The expected benefits were estimated using the same assumptions as those used to calculate the benefit obligations in the preceding tables and includes benefits attributable to estimated future employee service. (In thousands) For the year ended December 31, Pension Postretirement 2016 $ 31,328 $ 982 2017 25,366 903 2018 24,653 843 2019 21,567 225 2020 19,463 228 2021 through 2025 95,975 1,210
Investment Allocation Strategy	As the plan’s funded ratio status improves, the allocation to liability-hedging assets will increase. Dynamic Investment Policy Schedule Return-Seeking (and Diversification) Allocation Strategy Funded Ratio Minimum Target Maximum ≤97% 36% 40% 44% 98% 34% 38% 42% 99% 31% 35% 39% 100% 30% 33% 36% 101% 28% 31% 34% 102% 26% 29% 32% 103% 23% 26% 29% 104% 21% 24% 27% 105% 18% 21% 24% 106% 16% 18% 20% 107% 12% 14% 16% ≥108% 8% 10% 12%
Schedule of Allocation of Plan Assets	The weighted-average allocations for the FirstMerit Pension Plan as of December 31, 2015 and 2014 , by asset category, are as follows: Percentage of December 31, Asset Category 2015 2014 Cash and domestic money market funds 1.95 % 1.49 % U.S. Treasury obligations 2.40 % 1.97 % U.S. Government agencies 1.08 % 1.12 % Corporate bonds 2.74 % 2.79 % Common stocks 14.30 % 13.54 % Equity mutual funds 17.61 % 18.85 % Fixed income mutual funds 49.62 % 50.11 % Foreign mutual funds 10.30 % 10.13 % 100.00 % 100.00 %
Schedule of Defined Benefit Plans Disclosure	The following table sets forth by level, within the fair value hierarchy, the FirstMerit Pension Plan’s assets at fair value as of December 31, 2015 : (In thousands) Level 1 Level 2 Level 3 Total Domestic money market funds $ 4,620 $ — $ — $ 4,620 United States government securities — 5,675 — 5,675 United States government agency issues — 2,588 — 2,588 Corporate bonds — 6,479 — 6,479 Common stocks 33,851 — — 33,851 Equity mutual funds 41,706 — — 41,706 Fixed income mutual funds 117,485 — — 117,485 Foreign mutual funds 24,377 — — 24,377 Total assets at fair value $ 222,039 $ 14,742 $ — $ 236,781

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2015
Share-based Compensation [Abstract]
Schedule of Share-based Compensation, Stock Options, Activity	A summary of stock option activity under the Plans as of December 31, 2015 , 2014 , and 2013 , and changes during the years then ended is as follows: Options Shares (000’s) Weighted-Average Exercise Price Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value (000’s) Outstanding at January 1, 2013 1,820 $ 24.73 1.82 — Acquired 63 218.01 Exercised — — Forfeited (8 ) 23.93 Expired (479 ) 36.64 Outstanding at December 31, 2013 1,396 $ 28.84 1.14 $ 87 Exercised — — Forfeited — — Expired (558 ) 31.91 Outstanding at December 31, 2014 838 $ 26.64 0.62 $ — Exercised — — Forfeited — — Expired (582 ) 28.25 Outstanding at December 31, 2015 256 $ 23.00 0.52 $ — Exercisable at December 31, 2015 256 $ 23.00 0.52 $ —
Schedule of Nonvested Share Activity	A summary of the status of the Corporation’s nonvested shares as of December 31, 2015 , 2014 , and 2013 , and changes during the years then ended, is as follows: Weighted-Average Grant Date Nonvested (restricted) Stock Awards Shares (000’s) Fair Value Nonvested at January 1, 2013 1,079 $ 17.00 Granted 823 16.47 Vested (508 ) 17.90 Forfeited or expired (52 ) 16.89 Nonvested at December 31, 2013 1,342 $ 16.34 Granted 777 19.67 Vested (664 ) 16.30 Forfeited or expired (42 ) 18.16 Nonvested at December 31, 2014 1,413 $ 18.16 Granted 792 19.48 Vested (711 ) 18.95 Forfeited or expired (88 ) 18.99 Nonvested at December 31, 2015 1,406 $ 19.10

Parent Company (Tables)

Parent Company (Tables)	12 Months Ended
	Dec. 31, 2015
Parent Company [Abstract]
Schedule Of Condensed Financial Statements	Condensed financial information of FirstMerit Corporation (Parent Company only) is as follows: (In thousands) As of December 31, Condensed Balance Sheets 2015 2014 Assets: Cash and due from banks $ 99,638 $ 142,950 Investment securities 1,553 1,553 Investment in subsidiaries, at equity in underlying value of their net assets 3,087,651 2,936,865 Other assets 16,565 20,479 Total Assets $ 3,205,407 $ 3,101,847 Liabilities and Shareholders’ Equity: Long-term debt $ 248,443 $ 249,935 Accrued and other liabilities 16,869 17,631 Shareholders’ equity 2,940,095 2,834,281 Total Liabilities and Shareholders’ Equity $ 3,205,407 $ 3,101,847 (In thousands) Years Ended December 31, Condensed Statements of Income 2015 2014 2013 Income: Cash dividends from subsidiaries $ 103,500 $ 82,642 $ 81,715 Noninterest income 480 437 483 Total income 103,980 83,079 82,198 Interest and other expenses 27,096 30,613 29,684 Income before income tax benefit and equity in undistributed income of subsidiaries 76,884 52,466 52,514 Income tax benefit (9,451 ) (10,324 ) (9,341 ) Income before equity in undistributed net income of subsidiaries 86,335 62,790 61,855 Equity in undistributed income of subsidiaries 143,149 175,161 121,829 Net income $ 229,484 $ 237,951 $ 183,684 (In thousands) Years Ended December 31, Condensed Statements of Cash Flows 2015 2014 2013 Operating activities: Net income $ 229,484 $ 237,951 $ 183,684 Adjustments to reconcile net income to net cash provided by operating activities Equity in undistributed income of subsidiaries (143,149 ) (175,161 ) (121,829 ) Decrease (increase) in Federal income tax receivable 4,863 35,672 (30,399 ) Decrease (increase) in deferred Federal tax asset 1,776 (1,449 ) 27,032 Increase in interest payable — — 4,618 Other (4,978 ) (552 ) 924 Net cash provided by operating activities 87,996 96,461 64,030 Investing activities: Loans or advances to subsidiaries — — (50 ) Repayment of loans to or investment in subsidiaries — 110,675 — Cash paid for acquisition, net of cash received — — (315,069 ) Sale of investment securities — 784 — Purchases of investment securities — (81 ) (215 ) Net cash provided (used) by investing activities — 111,378 (315,334 ) Financing activities: Proceeds from issuance of subordinated debt — — 249,927 Proceeds from issuance of preferred stock — — 96,550 Repayment of long-term debt — (74,451 ) — Cash dividends - common stock (108,887 ) (105,333 ) (96,222 ) Cash dividends - preferred stock (5,876 ) (5,876 ) (5,337 ) Purchase of treasury shares (4,395 ) (4,261 ) (9,521 ) Repurchase of common stock warrant (12,150 ) — — Net cash (used) provided by financing activities (131,308 ) (189,921 ) 235,397 (Decrease) increase in cash and cash equivalents (43,312 ) 17,918 (15,907 ) Cash and cash equivalents at beginning of year 142,950 125,032 140,939 Cash and cash equivalents at end of year $ 99,638 $ 142,950 $ 125,032

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2015
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 years ended December 31, 2015 , 2014 , and 2013 : (In thousands) FirstMerit December 31, 2015 Commercial Retail Wealth Other Consolidated OPERATIONS: Net interest income/(expense) $ 406,520 $ 370,781 $ 22,403 $ (58,409 ) $ 741,295 Provision for loan losses 16,373 28,152 94 481 45,100 Noninterest income 88,384 96,979 57,995 25,640 268,998 Noninterest expense 240,634 345,827 54,681 (2,452 ) 638,690 Net income/(loss) 154,632 60,957 16,654 (2,759 ) 229,484 AVERAGES: Assets 9,464,876 6,022,529 298,435 9,369,952 25,155,792 Loans 9,550,421 5,775,543 289,044 58,192 15,673,200 Earnings assets 9,868,378 5,783,272 289,044 6,498,822 22,439,516 Deposits 7,071,238 11,035,639 1,215,174 536,799 19,858,850 Economic capital 1,309,589 807,150 115,447 670,974 2,903,160 (In thousands) FirstMerit December 31, 2014 Commercial Retail Wealth Other Consolidated OPERATIONS: Net interest income/(expense) $ 417,788 $ 383,151 $ 20,330 $ (45,701 ) $ 775,568 Provision for loan losses 2,898 39,618 1,895 7,868 52,279 Noninterest income 91,483 106,716 55,800 27,525 281,524 Noninterest expense 247,258 359,848 54,204 3,609 664,919 Net income/(loss) 171,560 58,760 13,021 (5,390 ) 237,951 AVERAGES: Assets 9,265,088 5,641,517 271,975 9,239,631 24,418,211 Loans 9,262,224 5,305,071 261,321 62,699 14,891,315 Earnings assets 9,549,341 5,328,107 261,321 6,363,978 21,502,747 Deposits 6,679,007 11,484,763 1,089,068 275,597 19,528,435 Economic capital 1,318,357 741,165 100,327 630,290 2,790,139 (In thousands) FirstMerit December 31, 2013 Commercial Retail Wealth Other Consolidated OPERATIONS: Net interest income/(expense) $ 408,006 $ 349,433 $ 17,192 $ (63,846 ) $ 710,785 Provision for loan losses 17,072 16,151 (692 ) 1,153 33,684 Noninterest income 83,933 114,679 48,289 23,442 270,343 Noninterest expense 209,936 330,875 54,196 89,246 684,253 Net income/(loss) 172,206 76,105 7,784 (72,411 ) 183,684 AVERAGES: Assets 8,397,357 4,746,277 259,601 8,086,540 21,489,775 Loans 8,292,805 4,367,701 226,152 62,008 12,948,666 Earnings assets 8,480,005 4,392,937 226,179 5,393,874 18,492,995 Deposits 5,572,287 10,749,725 826,794 152,782 17,301,588 Economic capital 602,561 256,362 72,244 1,477,698 2,408,865

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring and Nonrecurring Basis	The following tables present the balance of assets and liabilities measured at fair value on a recurring and nonrecurring basis at December 31, 2015 and 2014 : 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 — Nonagency 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, nonagency issued 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 sales 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 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 a credit of $0.6 million included in loans sales and servicing income in the year ended December 31, 2015 . (3) 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) December 31, 2014 Level 1 Level 2 Level 3 Recurring fair value measurement Available-for-sale securities: Marketable equity securities $ 2,974 $ 2,974 $ — $ — U.S. government agency debentures 2,482 — 2,482 — U.S. States and political subdivisions 227,342 — 227,342 — Residential mortgage-backed securities: U.S. government agencies 970,998 — 970,998 — Commercial mortgage-backed securities: U.S. government agencies 103,403 — 103,403 — Residential collateralized mortgage-backed securities: U.S. government agencies 1,676,567 — 1,676,567 — Nonagency 7 — 1 6 Commercial collateralized mortgage-backed securities: U.S. government agencies 222,334 — 222,334 — Corporate debt securities 51,337 — — 51,337 Asset-backed securities: Collateralized loan obligations, nonagency issued 287,844 — — 287,844 Total available-for-sale securities 3,545,288 2,974 3,203,127 339,187 Residential loans held for sale 13,428 — 13,428 — Derivative assets: Interest rate swaps - fair value hedges 5,256 — 5,256 — Interest rate swaps - nondesignated 48,366 — 48,366 — Mortgage loan commitments 1,408 — 1,408 — Foreign exchange 167 — 167 — Total derivative assets 55,197 — 55,197 — Total fair value of assets (1) $ 3,613,913 $ 2,974 $ 3,271,752 $ 339,187 Derivative liabilities: Interest rate swaps - fair value hedges 6,683 — 6,683 — Interest rate swaps - nondesignated 48,366 — 48,366 — Forward sale contracts 272 — 272 — Foreign exchange 118 — 118 — Total derivative liabilities 55,439 — 55,439 — True-up liability 13,294 — — 13,294 Total fair value of liabilities (1) $ 68,733 $ — $ 55,439 $ 13,294 Nonrecurring fair value measurement Mortgage servicing rights (2) $ 21,228 $ — $ — $ 21,228 Impaired loans (3) 56,041 — — 56,041 Other property (4) 12,510 — — 12,510 Other real estate covered by loss share (5) 3,614 — — 3,614 Total fair value $ 93,393 $ — $ — $ 93,393 (1) There were no transfers between levels 1, 2, or 3 of the fair value hierarchy during the year ended December 31, 2014 . (2) MSRs with a recorded investment of $22.0 million were reduced by a specific valuation allowance totaling $1.0 million to a reported carrying value of $21.1 million resulting in the recovery of previously recognized expense of $0.7 million included in loan sales and servicing income in the year ended December 31, 2014 . (3) Collateral dependent impaired loans with a recorded investment of $60.3 million were reduced by specific valuation allowance allocations totaling $4.3 million to a reported net carrying value of $56.0 million . (4) Amounts do not include assets held at cost at December 31, 2014 . During the year ended December 31, 2014 , the re-measurement of foreclosed assets at fair value subsequent to initial recognition resulted in losses of $2.6 million included in noninterest expense. (5) Amounts do not include assets held at cost at December 31, 2014 . During the year ended December 31, 2014 , the re-measurement of covered foreclosed assets at fair value subsequent to initial recognition resulted in losses of $1.2 million included in noninterest expense.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the years ended December 31, 2015 and 2014 are summarized as follows: Year Ended December 31, 2015 December 31, 2014 (In thousands) Available-for-sale securities True-up liability Available-for-sale securities True-up liability Balance at beginning of period $ 339,187 $ 13,294 $ 347,611 $ 11,463 Fair value of assets acquired — — — — (Gains) losses included in earnings (1) — 1,456 — 1,831 Unrealized gains (losses) (2) 2,653 — (6,030 ) — Purchases 79,446 — — — Sales (71,832 ) — — — Settlements (7,810 ) — (2,394 ) — Balance at ending of period $ 341,644 $ 14,750 $ 339,187 $ 13,294 (1) Reported in noninterest expense (2) Reported in other comprehensive income (loss)
Schedule 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) December 31, 2015 December 31, 2014 Aggregate fair value carrying amount $ 5,472 $ 13,428 Aggregate unpaid principal / contractual balance 5,320 12,912 Carrying amount over aggregate unpaid principal (1) $ 152 $ 516 (1) These changes are included in loan sales and servicing income in the Consolidated Statement of Income.
Fair Value, by Balance Sheet Grouping	The carrying amount and estimated fair value of the Corporation’s financial instruments that are carried at either fair value or cost as of December 31, 2015 , and 2014 , are shown in the tables below. 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 — December 31, 2014 Carrying Amount Fair Value (In thousands) Total Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 697,424 $ 697,424 $ 697,424 $ — $ — Available-for-sale securities 3,545,288 3,545,288 2,974 3,203,127 339,187 Held to maturity securities 2,903,609 2,875,920 — 2,875,920 — Other securities 148,654 148,654 — 148,654 — Loans held for sale 13,428 13,428 — 13,428 — Net originated loans 12,398,116 12,235,530 — — 12,235,530 Net acquired loans 2,471,723 2,564,842 — — 2,564,842 Net FDIC acquired loans and loss share 312,659 312,659 — — 312,659 Accrued interest receivable 63,657 63,657 — 63,657 — Derivatives 55,197 55,197 — 55,197 — Financial liabilities: Deposits $ 19,504,665 $ 19,510,192 $ — $ 19,510,192 $ — Federal funds purchased and securities sold under agreements to repurchase 1,272,591 1,272,591 — 1,272,591 — Wholesale borrowings 428,071 430,676 — 430,676 — Long-term debt 505,192 516,476 — 516,476 — Accrued interest payable 9,820 9,820 — 9,820 — Derivatives 55,439 55,439 — 55,439 —

Derivatives and Hedging Activ48

Derivatives and Hedging Activity (Tables)	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments Designated as Hedging Instruments	At December 31, 2015 and 2014 , 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 December 31, 2015 December 31, 2014 December 31, 2015 December 31, 2014 (In thousands) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps: Commercial Loan Swaps (FRAPS) $ — $ — $ — $ — $ 55,689 $ 3,536 $ 93,313 $ 6,683 Sub Debt Swap 250,000 8,739 250,000 5,256 — — — — Fair value hedges $ 250,000 $ 8,739 $ 250,000 $ 5,256 $ 55,689 $ 3,536 $ 93,313 $ 6,683 (1) Included in Other Assets on the Consolidated Balance Sheet (2) Included in Other Liabilities on the Consolidated Balance Sheet
Derivative Instruments not Designated as Hedging Instruments	As of December 31, 2015 and 2014 , 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 December 31, 2015 December 31, 2014 December 31, 2015 December 31, 2014 (In thousands) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps $ 1,824,576 $ 48,920 $ 1,673,012 $ 48,366 $ 1,824,576 $ 48,920 $ 1,673,012 $ 48,366 Mortgage loan commitments 20,635 149 102,523 1,408 — — — — Forward sales contracts — — — — 9,659 5 47,657 272 Credit contracts — — 10,001 — 73,715 — 69,227 — Foreign exchange 13,671 299 22,406 167 11,706 284 6,580 118 Equity swap — — — — 36,631 — 25,198 — Total $ 1,858,882 $ 49,368 $ 1,807,942 $ 49,941 $ 1,956,287 $ 49,209 $ 1,821,674 $ 48,756 (1) Included in Other Assets on the Consolidated Balance Sheet (2) Included in Other Liabilities on the Consolidated Balance Sheet
Derivative Instruments, Gain (Loss)	Gains and losses recognized in income on nondesignated hedging instruments for the years ended December 31, 2015 , 2014 and 2013 , are as follows: (In thousands) Derivatives not instruments Location of Gain/(Loss) Derivative Amount of Gain / (Loss) Recognized in Income on Derivatives Year Ended December 31, 2015 2014 2013 Mortgage loan commitments Other operating income $ (1,260 ) $ 517 $ (3,509 ) Forward sales contracts Other operating income 267 (656 ) 446 Foreign exchange contracts Other operating income (2,154 ) (210 ) (233 ) Other Other operating expense — (515 ) — Total $ (3,147 ) $ (864 ) $ (3,296 )
Offsetting disclosure for derivatives contracts	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 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 - nondesignated 155 — 155 (155 ) — — Foreign exchange — — — — — — Total derivative assets $ 8,894 $ — $ 8,894 $ (155 ) $ — $ 8,739 Derivative Liabilities Interest rate swaps - designated $ 3,536 $ — $ 3,536 $ — $ (3,536 ) $ — Interest rate swaps - nondesignated 48,765 — 48,765 (155 ) (48,610 ) — Foreign exchange — — — — — — Total derivative liabilities $ 52,301 $ — $ 52,301 $ (155 ) $ (52,146 ) $ — As of December 31, 2014 Gross amounts recognized Gross amounts offset in the consolidated balance sheet Net amounts presented in the consolidated balance sheet Gross amounts not offset in the consolidated balance sheet Net amount (In thousands) Financial instruments (1) Collateral (2) Derivative Assets Interest rate swaps - designated $ 5,256 $ — $ 5,256 $ — $ — $ 5,256 Interest rate swaps - nondesignated 352 — 352 (352 ) — — Foreign exchange 134 — 134 (28 ) (106 ) — Total derivative assets $ 5,742 $ — $ 5,742 $ (380 ) $ (106 ) $ 5,256 Derivative Liabilities Interest rate swaps - designated $ 6,683 $ — $ 6,683 $ — $ (6,683 ) $ — Interest rate swaps - nondesignated 48,014 — 48,014 (352 ) (47,662 ) — Foreign exchange 28 — 28 (28 ) — — Total derivative liabilities $ 54,725 $ — $ 54,725 $ (380 ) $ (54,345 ) $ — (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 Sheet 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 Sheet unless the Corporation defaults.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	The Corporation is obligated under various noncancelable operating leases on branch offices. Minimum future rental payments under noncancelable operating leases at December 31, 2015 are as follows: (In thousands) Years Ended December 31, Lease Commitments 2016 $ 11,942 2017 11,288 2018 9,842 2019 7,870 2020 6,605 2021-2034 18,521 Total minimum future rental payments $ 66,068
Schedule of commitments to extend credit	This amount represents the Corporation’s maximum exposure to loss if the customer were to draw upon the full amount of the commitment and subsequently default on payment for the total amount of the then outstanding loan. At December 31, (In thousands) 2015 2014 Loan Commitments Commercial $ 3,992,089 $ 3,748,690 Consumer 2,393,058 2,387,623 Total loan commitments $ 6,385,147 $ 6,136,313
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. At December 31, (In thousands) 2015 2014 Financial guarantees Standby letters of credit $ 254,703 $ 242,390 Loans sold with recourse 12,902 45,071 Total financial guarantees $ 267,605 $ 287,461
Changes in Repurchase Reserve	Changes in the amount of the repurchase reserve for the years ended December 31, 2015 , and 2014 , are as follows: Year Ended December 31, 2015 (In thousands) Reserve on residential mortgage loans Reserve on manufactured housing loans Total repurchased reserve Balance at beginning of period $ 7,250 $ 1,124 $ 8,374 Net increase/(decrease) to reserve (3,638 ) (1,130 ) (4,768 ) Net realized gains/(losses) (887 ) 6 (881 ) Balance at end of period $ 2,725 $ — $ 2,725 Year Ended December 31, 2014 (In thousands) Reserve on residential mortgage loans Reserve on manufactured housing loans Total repurchased reserve Balance at beginning of period $ 8,737 $ 1,114 $ 9,851 Net increase/(decrease) to reserve (4,564 ) 10 (4,554 ) Net realized gains/(losses) 3,077 — 3,077 Balance at end of period $ 7,250 $ 1,124 $ 8,374

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2015
Stockholders' Equity Note [Abstract]
Earnings per share	The reconciliation between basic and diluted EPS using the two-class method and treasury stock method is presented as follows: Year Ended December 31, (In thousands, except per share amounts) 2015 2014 2013 Basic EPS: Net income $ 229,484 $ 237,951 $ 183,684 Less: Cash dividends on 5.875% non-cumulative perpetual series A, preferred stock 5,876 5,876 5,337 Income allocated to participating securities 1,836 1,930 1,545 Net income attributable to common shareholders $ 221,772 $ 230,145 $ 176,802 Weighted average Common Stock outstanding used in basic EPS 165,669 165,296 149,607 Basic net income per common share $ 1.34 $ 1.39 $ 1.18 Diluted EPS: Income used in diluted earnings per share calculation $ 221,772 $ 230,145 $ 176,802 Weighted average Common Stock outstanding used in basic EPS 165,669 165,296 149,607 Add: Common Stock equivalents: Employee stock award plans 458 758 814 Weighted average Common and Common Stock equivalent shares outstanding 166,127 166,054 150,421 Diluted net income per common share $ 1.33 $ 1.39 $ 1.18

Changes and Reclassifications51

Changes and Reclassifications Out of Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2015
Changes and Reclassifications Out of Other Comprehensive Income [Abstract]
Comprehensive Income (Loss)	The following table presents the changes in AOCI by components of comprehensive income for the years ended December 31, 2015 and 2014 : Year Ended December 31, 2015 (In thousands) Pre-tax 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) (19,842 ) (11,253 ) (8,589 ) Changes in unrealized securities’ holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity (3,456 ) (1,254 ) (2,202 ) Net losses/(gains) realized on sale of securities reclassified to noninterest income (957 ) (348 ) (609 ) Balance at the end of the period (32,786 ) (15,840 ) (16,946 ) Pension plans and other postretirement benefits: Balance at the beginning and end of the period (102,068 ) (35,722 ) (66,346 ) Current year actual gains/(losses) 116 42 74 Amortization of actuarial losses/(gains) 4,552 1,652 2,900 Amortization of prior service cost reclassified to other noninterest expense 1,640 596 1,044 Balance at the end of the period (95,760 ) (33,432 ) (62,328 ) Total Accumulated Other Comprehensive Income $ (128,546 ) $ (49,272 ) $ (79,274 ) Year Ended December 31, 2014 (In thousands) Pre-tax Tax After-tax Unrealized and realized securities gains and losses: Balance at the beginning of the period $ (45,072 ) $ (15,776 ) $ (29,296 ) Changes in unrealized securities’ holding gains/(losses) 38,864 13,602 25,262 Changes in unrealized securities’ holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity (2,157 ) (753 ) (1,404 ) Net losses/(gains) realized on sale of securities reclassified to noninterest income (166 ) (58 ) (108 ) Balance at the end of the period (8,531 ) (2,985 ) (5,546 ) Pension plans and other postretirement benefits: Balance at the beginning and end of the period (57,813 ) (20,233 ) (37,580 ) Current year actual gains/(losses) (49,552 ) (17,344 ) (32,208 ) Amortization of actuarial losses/(gains) 3,166 1,108 2,058 Amortization of prior service cost reclassified to other noninterest expense 2,131 747 1,384 Balance at the end of the period (102,068 ) (35,722 ) (66,346 ) Total Accumulated Other Comprehensive Income $ (110,599 ) $ (38,707 ) $ (71,892 )
Reclassification out of Accumulated Other Comprehensive Income	The following table presents current period reclassifications out of AOCI by component of comprehensive income for the years ended December 31, 2015 and 2014 : (In thousands) Year Ended December 31, 2015 Statement of Income line item presentation Realized (gains) losses on sale of securities $ (957 ) Investment securities losses (gains), net Tax expense (benefit) (36.3%) (348 ) Income tax expense (benefit) Reclassified amount, net of tax $ (609 ) (In thousands) Year Ended December 31, 2014 Statement of Income line item presentation Realized (gains) losses on sale of securities $ (166 ) Investment securities losses (gains), net Tax expense (benefit) (35%) (58 ) Income tax expense (benefit) Reclassified amount, net of tax $ (108 )

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2015
Regulatory Capital Requirements [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The capital terms used in this note to the consolidated financial statements are defined in the regulations as well as in the “Capital Resources” section of Management’s Discussion and Analysis of Financial Condition and Results of Operations in this Form 10-K. (Dollars in thousands) Consolidated Actual Adequately Capitalized: Well Capitalized: As of December 31, 2015 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital (1) (2) (to Risk Weighted Assets) $ 2,733,143 13.74 % $ 1,591,341 8.00 % $ 1,989,176 10.00 % CET1 capital (1) (2) (to Risk Weighted Assets) 2,119,025 10.65 % 895,129 4.50 % 1,292,964 6.50 % Tier 1 Capital (1) (2) (to Risk Weighted Assets) 2,119,025 10.65 % 1,193,506 6.00 % 1,591,341 8.00 % Tier 1 leverage (1) (2) (to Average Assets) 2,119,025 8.63 % 981,690 4.00 % 1,227,113 5.00 % Actual Adequately Capitalized: Well Capitalized: As of December 31, 2014 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital (1) (2) (to Risk Weighted Assets) $ 2,653,893 15.26 % $ 1,391,282 8.00 % $ 1,739,102 10.00 % Tier 1 Capital (1) (2) (to Risk Weighted Assets) 2,004,461 11.53 % 695,641 4.00 % 1,043,461 6.00 % Tier 1 leverage (1) (2) (to Average Assets) 2,004,461 8.43 % 951,430 4.00 % 1,189,287 5.00 % (1) See Figure 4 entitled GAAP to Non-GAAP Reconciliations , which presents the computations of certain financial measures related to tangible common equity and efficiency ratios. The table reconciles the GAAP performance measures to the corresponding non-GAAP measures, which provides a basis for period to period comparisons. (2) The Basel III capital rules, effective January 1, 2015, replace tier 1 common equity and the associated tier 1 common equity ratio with CET1 capital and the CET1 risk-based capital ratio. December 31, 2015 figures are presented on a Basel III basis and reflect transitional capital requirements and phase-in provisions, including the standardized approach for calculating risk weighted assets. December 31, 2014 amounts and ratios are reported on a Basel I basis. At December 31, 2015 and 2014 , the most recent notification from the OCC categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well-capitalized the Bank must maintain minimum total risk-based, CET1 risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the table. In Management’s opinion, there are no conditions or events since the OCC’s notification that have changed the Bank’s categorization as “well-capitalized.” Bank Only (Dollars in thousands) Actual Adequately Capitalized: Well Capitalized: As of December 31, 2015 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital (1) (2) (to Risk Weighted Assets) $ 2,668,419 13.42 % $ 1,590,382 8.00 % $ 1,987,978 10.00 % CET1 capital (1) (2) (to Risk Weighted Assets) 2,262,669 11.38 % 894,590 4.50 % 1,292,185 6.50 % Tier 1 Capital (1) (2) (to Risk Weighted Assets) 2,262,669 11.38 % 1,192,787 6.00 % 1,590,382 8.00 % Tier 1 leverage (1) (2) (to Average Assets) 2,262,669 9.23 % 980,975 4.00 % 1,226,219 5.00 % Actual Adequately Capitalized: Well Capitalized: As of December 31, 2014 Amount Ratio Amount Ratio Amount Ratio Total risk-based capital (1) (2) (to Risk Weighted Assets) $ 2,521,412 14.49 % $ 1,391,988 8.00 % $ 1,739,986 10.00 % Tier 1 Capital (1) (2) (to Risk Weighted Assets) 2,127,065 12.22 % 695,994 4.00 % 1,043,991 6.00 % Tier 1 leverage (1) (2) (to Average Assets) 2,127,065 8.94 % 951,455 4.00 % 1,189,319 5.00 % (1) See Figure 4 entitled GAAP to Non-GAAP Reconciliations , which presents the computations of certain financial measures related to tangible common equity and efficiency ratios. The table reconciles the GAAP performance measures to the corresponding non-GAAP measures, which provides a basis for period to period comparisons. (2) The Basel III capital rules, effective January 1, 2015, replace tier 1 common equity and the associated tier 1 common equity ratio with CET1 capital and the CET1 risk-based capital ratio. December 31, 2015 figures are presented on a Basel III basis and reflect transitional capital requirements and phase-in provisions, including the standardized approach for calculating risk weighted assets. December 31, 2014 amounts and ratios are reported on a Basel I basis.

Summary of Significant Accoun53

Summary of Significant Accounting Policies (Details)	Dec. 31, 2015Branch
Accounting Policies [Abstract]
Number of branches	366

Summary of Significant Accoun54

Summary of Significant Accounting Policies (Allowance of Loan Losses) (Details) $ in Millions	Dec. 31, 2015USD ($)
Accounting Policies [Abstract]
Minimum non-performing substandard loans outstanding for allowance for credit losses	$ 0.3
Minimum non-performing substandard doubtful loans outstanding for allowance for credit losses	$ 0.1

Summary of Significant Accoun55

Summary of Significant Accounting Policies (Recently Adopted Accounting Standards) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2013	Jun. 30, 2015	Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unamortized debt issuance expenses			$ 3.7
Accounting Standards Update 2014-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in accounting principle, effect of adoption	$ 3.1
Other Assets | Accounting Standards Update 2015-3
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unamortized debt issuance expenses		$ (3.7)
Long-term Debt | Accounting Standards Update 2015-3
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unamortized debt issuance expenses		$ 3.7

Investment Securities (Details

Investment Securities (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-Sale and Held-to-Maturity Securities [Line Items]
General obligation bonds, 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
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%
Other investment securities pledged	$ 2,900,000	$ 2,800,000
Available for sale securities, net unrealized losses	(53,000)	(44,900)
Unrealized Gain (Loss) on Investments	$ (100,400)	(102,400)
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	$ 3,967,735	3,545,288
Collateralized Loan Obligations
Schedule of Available-for-Sale and Held-to-Maturity Securities [Line Items]
Available-for-sale	289,411	$ 287,844
Unrealized loss position	$ 8,400

Investment Securities (Amortize

Investment Securities (Amortized Cost) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Securities available for sale
Amortized cost	$ 4,005,782	$ 3,562,537
Available-for-sale Securities, Gross Unrealized Gains	18,980	35,382
Available-for-sale Securities, Gross Unrealized Losses	(57,027)	(52,631)
Available-for-sale	3,967,735	3,545,288
Securities held to maturity
Amortized cost	2,674,093	2,903,609
Held-to-maturity Securities, Gross Unrealized Gains	28,375	22,108
Held-to-maturity Securities, Gross Unrealized Losses	(43,349)	(49,797)
Held-to-maturity Securities, Fair Value	2,659,119	2,875,920
U.S. Treasury obligations
Securities available for sale
Amortized cost	5,001
Available-for-sale Securities, Gross Unrealized Gains	0
Available-for-sale Securities, Gross Unrealized Losses	(1)
Available-for-sale	5,000
Securities held to maturity
Amortized cost	0	5,000
Held-to-maturity Securities, Gross Unrealized Gains		0
Held-to-maturity Securities, Gross Unrealized Losses		0
Held-to-maturity Securities, Fair Value	0	5,000
U.S. Government agencies
Securities available for sale
Amortized cost	2,500	2,500
Available-for-sale Securities, Gross Unrealized Gains	0	0
Available-for-sale Securities, Gross Unrealized Losses	(2)	(18)
Available-for-sale	2,498	2,482
Securities held to maturity
Amortized cost	25,000	25,000
Held-to-maturity Securities, Gross Unrealized Gains	19	0
Held-to-maturity Securities, Gross Unrealized Losses	0	(537)
Held-to-maturity Securities, Fair Value	25,019	24,463
U.S. States and political subdivisions
Securities available for sale
Amortized cost	188,829	221,052
Available-for-sale Securities, Gross Unrealized Gains	4,170	6,756
Available-for-sale Securities, Gross Unrealized Losses	(204)	(466)
Available-for-sale	192,795	227,342
Securities held to maturity
Amortized cost	571,738	517,824
Held-to-maturity Securities, Gross Unrealized Gains	22,180	12,645
Held-to-maturity Securities, Gross Unrealized Losses	(262)	(191)
Held-to-maturity Securities, Fair Value	593,656	530,278
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Securities available for sale
Amortized cost	900,358	951,839
Available-for-sale Securities, Gross Unrealized Gains	11,325	22,377
Available-for-sale Securities, Gross Unrealized Losses	(5,454)	(3,218)
Available-for-sale	906,229	970,998
Securities held to maturity
Amortized cost	507,908	580,727
Held-to-maturity Securities, Gross Unrealized Gains	4,767	7,495
Held-to-maturity Securities, Gross Unrealized Losses	(2,999)	(3,045)
Held-to-maturity Securities, Fair Value	509,676	585,177
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Securities available for sale
Amortized cost	173,912	104,176
Available-for-sale Securities, Gross Unrealized Gains	220	598
Available-for-sale Securities, Gross Unrealized Losses	(2,023)	(1,371)
Available-for-sale	172,109	103,403
Securities held to maturity
Amortized cost	64,951	58,143
Held-to-maturity Securities, Gross Unrealized Gains	294	281
Held-to-maturity Securities, Gross Unrealized Losses	(574)	(329)
Held-to-maturity Securities, Fair Value	64,671	58,095
Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises
Securities available for sale
Amortized cost	2,155,808	1,698,015
Available-for-sale Securities, Gross Unrealized Gains	2,659	4,777
Available-for-sale Securities, Gross Unrealized Losses	(30,147)	(26,225)
Available-for-sale	2,128,320	1,676,567
Securities held to maturity
Amortized cost	1,161,340	1,368,534
Held-to-maturity Securities, Gross Unrealized Gains	75	718
Held-to-maturity Securities, Gross Unrealized Losses	(35,881)	(38,875)
Held-to-maturity Securities, Fair Value	1,125,534	1,330,377
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency
Securities available for sale
Amortized cost	4	7
Available-for-sale Securities, Gross Unrealized Gains	0	0
Available-for-sale Securities, Gross Unrealized Losses	0	0
Available-for-sale	4	7
Securities held to maturity
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
Amortized cost	217,008	222,876
Available-for-sale Securities, Gross Unrealized Gains	580	863
Available-for-sale Securities, Gross Unrealized Losses	(1,269)	(1,405)
Available-for-sale	216,319	222,334
Securities held to maturity
Amortized cost	255,359	257,642
Held-to-maturity Securities, Gross Unrealized Gains	676	557
Held-to-maturity Securities, Gross Unrealized Losses	(3,611)	(6,768)
Held-to-maturity Securities, Fair Value	252,424	251,431
Collateralized Loan Obligations
Securities available for sale
Amortized cost	297,831	297,446
Available-for-sale Securities, Gross Unrealized Gains	26	11
Available-for-sale Securities, Gross Unrealized Losses	(8,446)	(9,613)
Available-for-sale	289,411	287,844
Securities held to maturity
Amortized cost	0
Held-to-maturity Securities, Fair Value	0
Corporate bonds
Securities available for sale
Amortized cost	61,710	61,652
Available-for-sale Securities, Gross Unrealized Gains	0	0
Available-for-sale Securities, Gross Unrealized Losses	(9,481)	(10,315)
Available-for-sale	52,229	51,337
Securities held to maturity
Amortized cost	87,797	90,739
Held-to-maturity Securities, Gross Unrealized Gains	364	412
Held-to-maturity Securities, Gross Unrealized Losses	(22)	(52)
Held-to-maturity Securities, Fair Value	88,139	91,099
Total debt securities
Securities available for sale
Amortized cost	4,002,961	3,559,563
Available-for-sale Securities, Gross Unrealized Gains	18,980	35,382
Available-for-sale Securities, Gross Unrealized Losses	(57,027)	(52,631)
Available-for-sale	3,964,914	3,542,314
Marketable equity securities
Securities available for sale
Amortized cost	2,821	2,974
Available-for-sale Securities, Gross Unrealized Gains	0	0
Available-for-sale Securities, Gross Unrealized Losses	0	0
Available-for-sale	2,821	2,974
Total equity securities
Securities available for sale
Amortized cost	2,821
Available-for-sale Securities, Gross Unrealized Gains	0
Available-for-sale Securities, Gross Unrealized Losses	0
Available-for-sale	$ 2,821	$ 2,974

Investment Securities (Schedule

Investment Securities (Schedule of General Obligation Bonds) (Details) $ in Thousands	Dec. 31, 2015USD ($)issuers	Dec. 31, 2014USD ($)issuers
general obligation bonds [Line Items]
Number of Issuers | issuers	712	825
Average Issue Size, Fair Value	$ 1,033	$ 917
Amortized Cost	712,035	737,673
Fair Value	$ 735,350	$ 756,315
MICHIGAN
general obligation bonds [Line Items]
Number of Issuers | issuers	137	169
Average Issue Size, Fair Value	$ 1,381	$ 842
Amortized Cost	180,508	138,325
Fair Value	$ 189,259	$ 142,292
OHIO
general obligation bonds [Line Items]
Number of Issuers | issuers	111	137
Average Issue Size, Fair Value	$ 1,091	$ 979
Amortized Cost	116,783	130,741
Fair Value	$ 121,117	$ 134,127
ILLINOIS
general obligation bonds [Line Items]
Number of Issuers | issuers	55	66
Average Issue Size, Fair Value	$ 1,870	$ 1,897
Amortized Cost	99,524	121,560
Fair Value	$ 102,867	$ 125,169
TEXAS
general obligation bonds [Line Items]
Number of Issuers | issuers	58	64
Average Issue Size, Fair Value	$ 807	$ 801
Amortized Cost	45,818	50,307
Fair Value	$ 46,805	$ 51,293
WISCONSIN
general obligation bonds [Line Items]
Number of Issuers | issuers	69	77
Average Issue Size, Fair Value	$ 673	$ 841
Amortized Cost	44,794	62,543
Fair Value	$ 46,454	$ 64,776
PENNSYLVANIA
general obligation bonds [Line Items]
Number of Issuers | issuers	42	45
Average Issue Size, Fair Value	$ 1,020	$ 1,000
Amortized Cost	42,185	44,443
Fair Value	$ 42,835	$ 45,006
WASHINGTON
general obligation bonds [Line Items]
Number of Issuers | issuers	29	30
Average Issue Size, Fair Value	$ 950	$ 952
Amortized Cost	27,080	27,987
Fair Value	$ 27,548	$ 28,558
NEW JERSEY
general obligation bonds [Line Items]
Number of Issuers | issuers	35	37
Average Issue Size, Fair Value	$ 725	$ 746
Amortized Cost	24,810	26,755
Fair Value	$ 25,372	$ 27,612
MINNESOTA
general obligation bonds [Line Items]
Number of Issuers | issuers	33	42
Average Issue Size, Fair Value	$ 667	$ 674
Amortized Cost	21,679	27,740
Fair Value	$ 22,020	$ 28,326
MISSOURI
general obligation bonds [Line Items]
Number of Issuers | issuers	15	19
Average Issue Size, Fair Value	$ 1,078	$ 1,011
Amortized Cost	15,878	18,764
Fair Value	$ 16,174	$ 19,207
NEW YORK
general obligation bonds [Line Items]
Number of Issuers | issuers	18	19
Average Issue Size, Fair Value	$ 635	$ 628
Amortized Cost	11,161	11,659
Fair Value	$ 11,422	$ 11,929
Other states
general obligation bonds [Line Items]
Number of Issuers | issuers	110	120
Average Issue Size, Fair Value	$ 759	$ 650
Amortized Cost	81,815	76,849
Fair Value	$ 83,477	$ 78,020

Investment Securities (Other In

Investment Securities (Other Investments) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other investments
FRB stock	$ 56,083	$ 55,681
FHLB stock	91,714	92,547
Other	375	426
Total other investments	$ 148,172	$ 148,654

Investment Securities (Realized

Investment Securities (Realized Gain (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Proceeds and gross unrealized gains and losses on sales of available-for-sale securities
Realized gains	$ 2,608	$ 382	$ 3,786
Realized losses	(1,651)	(216)	(6,589)
Net securities (losses)/gains	$ 957	$ 166	$ (2,803)

Investment Securities (Gross Un

Investment Securities (Gross Unrealized Loss) (Details) $ in Thousands	Dec. 31, 2015USD ($)securities	Dec. 31, 2014USD ($)securities
Securities available for sale
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 1,849,320	$ 424,916
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	913,649	1,485,458
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,762,969	1,910,374
Available-for-sale Securities, Continous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(19,569)	(2,807)
Available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	(37,458)	(49,824)
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (57,027)	$ (52,631)
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	180	53
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	91	162
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 370,605	$ 125,775
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,171,297	1,577,797
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	1,541,902	1,703,572
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(2,916)	(277)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss at End of Period	(40,433)	(49,520)
Held-to-Maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (43,349)	$ (49,797)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	58	30
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	79	108
U.S. Government agencies
Securities available for sale
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 2,498	$ 2,482
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,498	2,482
Available-for-sale Securities, Continous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(2)	(18)
Available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (2)	$ (18)
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	1	1
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	0	0
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, Twelve Months or Longer, Fair Value	0	24,463
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	0	24,463
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss at End of Period	0	(537)
Held-to-Maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ 0	$ (537)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	0	0
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	0	1
U.S. Treasury obligations
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, Twelve Months or Longer, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	5,000
Available-for-sale Securities, Continous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(1)
Available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (1)
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	1
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	0
U.S. States and political subdivisions
Securities available for sale
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 10,178	$ 5,637
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	5,899	22,528
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	16,077	28,165
Available-for-sale Securities, Continous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(37)	(11)
Available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	(167)	(455)
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (204)	$ (466)
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	20	11
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	9	36
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 18,465	$ 9,085
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	4,174	18,371
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	22,639	27,456
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(224)	(17)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss at End of Period	(38)	(174)
Held-to-Maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (262)	$ (191)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	21	9
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	6	21
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	$ 328,156	$ 50,126
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	95,895	199,773
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	424,051	249,899
Available-for-sale Securities, Continous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(3,026)	(182)
Available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	(2,428)	(3,036)
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (5,454)	$ (3,218)
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	27	5
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	7	14
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 85,738	$ 0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	97,880	185,361
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	183,618	185,361
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(715)	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss at End of Period	(2,284)	(3,045)
Held-to-Maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (2,999)	$ (3,045)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	6	0
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	6	10
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	$ 107,074	$ 12,284
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	12,401	45,485
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	119,475	57,769
Available-for-sale Securities, Continous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(1,447)	(55)
Available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	(576)	(1,316)
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (2,023)	$ (1,371)
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	15	2
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	1	6
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 34,833	$ 9,950
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	9,269	16,735
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	44,102	26,685
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(346)	(4)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss at End of Period	(228)	(325)
Held-to-Maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (574)	$ (329)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	6	2
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	1	2
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	$ 1,130,779	$ 243,970
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	597,403	905,478
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,728,182	1,149,448
Available-for-sale Securities, Continous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(10,587)	(906)
Available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	(19,560)	(25,319)
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (30,147)	$ (26,225)
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	78	15
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	49	64
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 140,514	$ 28,333
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	941,982	1,161,297
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	1,082,496	1,189,630
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(1,225)	(149)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss at End of Period	(34,656)	(38,726)
Held-to-Maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (35,881)	$ (38,875)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	12	3
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	55	58
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	$ 113,825	$ 31,375
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	23,400	67,169
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	137,225	98,544
Available-for-sale Securities, Continous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(893)	(229)
Available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	(376)	(1,176)
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (1,269)	$ (1,405)
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	12	4
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	2	7
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 71,812	$ 41,474
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	117,992	171,570
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	189,804	213,044
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(384)	(55)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss at End of Period	(3,227)	(6,713)
Held-to-Maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (3,611)	$ (6,768)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	7	3
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	11	16
Collateralized Loan Obligations
Securities available for sale
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 151,810	$ 79,042
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	126,422	193,687
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	278,232	272,729
Available-for-sale Securities, Continous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(3,576)	(1,406)
Available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	(4,870)	(8,207)
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (8,446)	$ (9,613)
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	26	15
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	15	27
Corporate bonds
Securities available for sale
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 0	$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	52,229	51,338
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	52,229	51,338
Available-for-sale Securities, Continous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	0	0
Available for sale securities, continuous unrealized loss position, 12 months or longer, aggregate loss at end of period	(9,481)	(10,315)
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (9,481)	$ (10,315)
Available for Sale Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	0	0
Available for Sale Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	8	8
Securities held to maturity
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 19,243	$ 36,933
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	19,243	36,933
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss as of Period End	(22)	(52)
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss at End of Period	0	0
Held-to-Maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss at End of Period	$ (22)	$ (52)
Held to Maturity Securities in Unrealized Loss Positions Less than Twelve Months Qualitative Disclosure Number of Positions | securities	6	13
Held to Maturity Securities in Unrealized Loss Positions Twelve Months or Longer Qualitative Disclosure Number of Positions | securities	0	0

Investment Securities (Maturiti

Investment Securities (Maturities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Securities Available for Sale
One year or less	$ 13,640
Over one year through five years	190,332
Over five years through ten years	590,610
Over ten years	3,170,332
Available-for-sale	$ 3,967,735	$ 3,545,288
Weighted Average Yield, one year or less	1.99%
Weighted Average Yield, over one year through five years	3.84%
Weighted Average Yield, over five years through ten years	3.02%
Weighted Average Yield, over ten years	2.09%
Available-for-sale Securities, Amortized Cost Basis	$ 4,005,782	3,562,537
Weighted-Average Yield	2.31%
Available for Sale Securities, Debt Maturities, Weighted-Average Maturity	4 years 1 month 17 days
Securities Held to Maturity
One year or less	$ 63,383
Over one year through five years	373,078
Over five years through ten years	309,660
Over ten years	$ 1,912,998
Weighted Average Yield, over one year through five years	1.99%
Weighted Average Yield, over five years through ten years	2.34%
Weighted Average Yield, over ten years	3.79%
Weighted Average Yield, Total	2.12%
Held-to-maturity Securities, Fair Value	$ 2,659,119	2,875,920
Held-to-maturity	$ 2,674,093	2,903,609
Held to Maturity Securities Debt Maturities Weighted Average Yield	2.33%
Held to Maturity Securities Debt Maturities Weighted Average Maturity	3 years 11 months 16 days
U.S. Government agencies
Securities Available for Sale
One year or less	$ 0
Over one year through five years	2,498
Over five years through ten years	0
Over ten years	0
Available-for-sale	2,498	2,482
Available-for-sale Securities, Amortized Cost Basis	$ 2,500	2,500
Weighted-Average Yield	1.25%
Available for Sale Securities, Debt Maturities, Weighted-Average Maturity	2 years 5 months 1 day
Securities Held to Maturity
One year or less	$ 0
Over one year through five years	25,019
Over five years through ten years	0
Over ten years	0
Held-to-maturity Securities, Fair Value	25,019	24,463
Held-to-maturity	$ 25,000	25,000
Held to Maturity Securities Debt Maturities Weighted Average Yield	1.43%
Held to Maturity Securities Debt Maturities Weighted Average Maturity	29 days
U.S. Treasury obligations
Securities Available for Sale
One year or less	$ 5,000
Over one year through five years	0
Over five years through ten years	0
Over ten years	0
Available-for-sale	5,000
Available-for-sale Securities, Amortized Cost Basis	$ 5,001
Weighted-Average Yield	0.28%
Available for Sale Securities, Debt Maturities, Weighted-Average Maturity	0 years
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	5,000
Held-to-maturity	$ 0	5,000
Held to Maturity Securities Debt Maturities Weighted Average Yield	0.00%
Held to Maturity Securities Debt Maturities Weighted Average Maturity	0 years
U.S. States and political subdivisions
Securities Available for Sale
One year or less	$ 8,640
Over one year through five years	78,968
Over five years through ten years	83,928
Over ten years	21,259
Available-for-sale	192,795	227,342
Available-for-sale Securities, Amortized Cost Basis	$ 188,829	221,052
Weighted-Average Yield	5.19%
Available for Sale Securities, Debt Maturities, Weighted-Average Maturity	2 years 2 months 1 day
Securities Held to Maturity
One year or less	$ 63,383
Over one year through five years	144,134
Over five years through ten years	216,331
Over ten years	169,808
Held-to-maturity Securities, Fair Value	593,656	530,278
Held-to-maturity	$ 571,738	517,824
Held to Maturity Securities Debt Maturities Weighted Average Yield	4.01%
Held to Maturity Securities Debt Maturities Weighted Average Maturity	4 years 9 months 29 days
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Securities Available for Sale
One year or less	$ 0
Over one year through five years	37,010
Over five years through ten years	71,478
Over ten years	797,741
Available-for-sale	906,229	970,998
Available-for-sale Securities, Amortized Cost Basis	$ 900,358	951,839
Weighted-Average Yield	2.39%
Available for Sale Securities, Debt Maturities, Weighted-Average Maturity	3 years 9 months 11 days
Securities Held to Maturity
One year or less	$ 0
Over one year through five years	0
Over five years through ten years	23,421
Over ten years	486,255
Held-to-maturity Securities, Fair Value	509,676	585,177
Held-to-maturity	$ 507,908	580,727
Held to Maturity Securities Debt Maturities Weighted Average Yield	2.15%
Held to Maturity Securities Debt Maturities Weighted Average Maturity	4 years 15 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	14,825
Over five years through ten years	136,728
Over ten years	20,556
Available-for-sale	172,109	103,403
Available-for-sale Securities, Amortized Cost Basis	$ 173,912	104,176
Weighted-Average Yield	2.03%
Available for Sale Securities, Debt Maturities, Weighted-Average Maturity	4 years 6 months 7 days
Securities Held to Maturity
One year or less	$ 0
Over one year through five years	35,953
Over five years through ten years	28,718
Over ten years	0
Held-to-maturity Securities, Fair Value	64,671	58,095
Held-to-maturity	$ 64,951	58,143
Held to Maturity Securities Debt Maturities Weighted Average Yield	2.55%
Held to Maturity Securities Debt Maturities Weighted Average Maturity	2 years 10 months 28 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	10,922
Over five years through ten years	23,697
Over ten years	2,093,701
Available-for-sale	2,128,320	1,676,567
Available-for-sale Securities, Amortized Cost Basis	$ 2,155,808	1,698,015
Weighted-Average Yield	2.04%
Available for Sale Securities, Debt Maturities, Weighted-Average Maturity	3 years 10 months 21 days
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	1,125,534
Held-to-maturity Securities, Fair Value	1,125,534	1,330,377
Held-to-maturity	$ 1,161,340	1,368,534
Held to Maturity Securities Debt Maturities Weighted Average Yield	1.60%
Held to Maturity Securities Debt Maturities Weighted Average Maturity	3 years 9 months 4 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	4
Over five years through ten years	0
Over ten years	0
Available-for-sale	4	7
Available-for-sale Securities, Amortized Cost Basis	$ 4	7
Weighted-Average Yield	3.07%
Available for Sale Securities, Debt Maturities, Weighted-Average Maturity	10 months 24 days
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	$ 0
Held to Maturity Securities Debt Maturities Weighted Average Yield	0.00%
Held to Maturity Securities Debt Maturities Weighted Average Maturity	0 years
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	46,105
Over five years through ten years	67,299
Over ten years	102,915
Available-for-sale	216,319	222,334
Available-for-sale Securities, Amortized Cost Basis	$ 217,008	222,876
Weighted-Average Yield	2.11%
Available for Sale Securities, Debt Maturities, Weighted-Average Maturity	4 years
Securities Held to Maturity
One year or less	$ 0
Over one year through five years	79,833
Over five years through ten years	41,190
Over ten years	131,401
Held-to-maturity Securities, Fair Value	252,424	251,431
Held-to-maturity	$ 255,359	257,642
Held to Maturity Securities Debt Maturities Weighted Average Yield	2.34%
Held to Maturity Securities Debt Maturities Weighted Average Maturity	4 years 15 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	207,480
Over ten years	81,931
Available-for-sale	289,411	287,844
Available-for-sale Securities, Amortized Cost Basis	$ 297,831	297,446
Weighted-Average Yield	2.77%
Available for Sale Securities, Debt Maturities, Weighted-Average Maturity	6 years 6 months 4 days
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	$ 0
Held to Maturity Securities Debt Maturities Weighted Average Yield	0.00%
Held to Maturity Securities Debt Maturities Weighted Average Maturity	0 years
Corporate bonds
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	52,229
Available-for-sale	52,229	51,337
Available-for-sale Securities, Amortized Cost Basis	$ 61,710	61,652
Weighted-Average Yield	1.24%
Available for Sale Securities, Debt Maturities, Weighted-Average Maturity	11 years 9 months 22 days
Securities Held to Maturity
One year or less	$ 0
Over one year through five years	88,139
Over five years through ten years	0
Over ten years	0
Held-to-maturity Securities, Fair Value	88,139	91,099
Held-to-maturity	$ 87,797	90,739
Held to Maturity Securities Debt Maturities Weighted Average Yield	2.28%
Held to Maturity Securities Debt Maturities Weighted Average Maturity	2 years 7 days
Total debt securities
Securities Available for Sale
Available-for-sale	$ 3,964,914	3,542,314
Available-for-sale Securities, Amortized Cost Basis	$ 4,002,961	$ 3,559,563

Loans (Total Originated, Acquir

Loans (Total Originated, Acquired and Covered Loans Outstanding Table) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial	$ 9,814,088	$ 9,498,770
Residential mortgage	1,048,621	1,061,043
Installment	3,565,798	3,162,493
Home equity	1,455,648	1,417,330
Loss share receivable	9,947	22,033
Credit cards	182,843	164,478
Total originated loans	16,076,945	15,326,147
Allowance for loan losses	(153,691)	(143,649)
Net loans	15,923,254	15,182,498
Originated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial	9,007,830	8,200,264
Residential mortgage	689,045	625,283
Installment	2,990,349	2,393,451
Home equity	1,248,438	1,110,336
Credit cards	182,843	164,478
Total originated loans	14,118,505	12,493,812
Allowance for loan losses	(105,135)	(95,696)
Net loans	14,013,370	12,398,116
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial	677,149	1,086,899
Residential mortgage	324,008	394,484
Installment	573,372	764,168
Home equity	168,542	233,629
Total originated loans	1,743,071	2,479,180
Allowance for loan losses	(3,877)	(7,457)
Net loans	1,739,194	2,471,723
Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial	129,109	211,607
Residential mortgage	35,568	41,276
Installment	2,077	4,874
Home equity	38,668	73,365
Loss share receivable		22,033
Total FDIC acquired loans	215,369	353,155
Allowance for FDIC acquired loan losses	(44,679)	(40,496)
Net FDIC acquired loans	$ 170,690	$ 312,659

Loans (Summary of Loans to Rela

Loans (Summary of Loans to Related Parties Table) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Loans and Leases Receivable, Related Parties [Roll Forward]
Aggregate amount at beginning of year	$ 20,682	$ 24,536	$ 16,578
New loans	5,365	2,534	11,507
Repayments	(5,619)	(6,388)	(4,374)
Changes in directors and their affiliations	0	0	825
Aggregate amount at end of year	$ 20,428	$ 20,682	$ 24,536

Loans (Changes in the carrying

Loans (Changes in the carrying amount and accretable yield for acquired impaired loans) (Details) - Acquired Impaired Loans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accretable Yield
Balance at the beginning of the period, Accretable Yield	$ 119,450	$ 136,646
Accretable Yield, Accretion	(40,756)	(49,271)
Net reclassifications from nonaccretable to accretable, Accretable Yield	37,245	45,824
Disposals, Accretable Yield	(26,116)	(13,749)
Balance at the end of the period, Accretable Yield	89,823	119,450
Carrying Amount of Loans
Balance at the beginning of the period, Carrying Amount of Loans	423,209	601,000
Accretion, Carrying Amount of Loans	40,756	49,271
Payments received, net, Carrying Amount of Loans	(179,256)	(227,062)
Balance at the end of the period, Carrying Amount of Loans	$ 284,709	$ 423,209

Loans (Changes in Loss Share Re

Loans (Changes in Loss Share Receivable Associated with Covered Loans Table) (Details) - Loss Share Receivable - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Changes in Loss Share Receivable [Roll Forward]
Balance at the beginning of the period	$ 22,033	$ 61,827
Amortization	(4,141)	(20,943)
Increase due to impairment on FDIC acquired loans	6,373	2,920
FDIC reimbursement	(13,795)	(17,837)
FDIC acquired loans paid in full	(523)	(3,934)
Balance at the end of the period	$ 9,947	$ 22,033

Loans (Changes in the carryin67

Loans (Changes in the carrying amount and accretable yield for covered loans) (Details) - Covered impaired loan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accretable Yield
Balance at the beginning of the period, Accretable Yield	$ 37,511	$ 67,282
Accretable Yield, Accretion	(14,947)	(42,161)
(Disposals)/Additions, Accretable Yield	(4,474)	(4,451)
Balance at the end of the period, Accretable Yield	22,908	37,511
Carrying Amount of Loans
Balance at the beginning of the period, Carrying Amount of Loans	232,452	403,692
Accretion, Carrying Amount of Loans	14,947	42,161
Payments received, net, Carrying Amount of Loans	(116,751)	(213,401)
Balance at the end of the period, Carrying Amount of Loans	$ 130,648	$ 232,452

Loans (Past Due Financing Recei

Loans (Past Due Financing Receivables Table) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total originated loans		$ 130,458
Consumer Loans Guaranteed by Government	$ 2,300	2,400
FDIC indemnification asset	9,947	22,033
Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	83,520	69,544
Current	14,034,985	12,424,268
Total originated loans	14,118,505	12,493,812	$ 10,213,387
More than 90 days Past Due and Accruing	8,022	12,156
Nonaccrual Loans	44,105	34,617
Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	45,707	75,356
Current	1,697,364	2,403,824
Total originated loans	1,743,071	2,479,180
More than 90 days Past Due and Accruing	3,096	3,471
Nonaccrual Loans	8,245	8,056
Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	45,608	77,196
Current	159,814	253,926
Total originated loans	205,422	331,122
FDIC indemnification asset	9,947	22,000
Commercial and Industrial Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total originated loans		7,318
Commercial and Industrial Financing Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	13,623	6,044
Current	5,779,785	5,169,157
Total originated loans	5,793,408	5,175,201	4,139,567
More than 90 days Past Due and Accruing	236	1,547
Nonaccrual Loans	23,123	6,114
Commercial and Industrial Financing Receivable | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,678	5,117
Current	236,467	444,137
Total originated loans	240,145	449,254
More than 90 days Past Due and Accruing	13	0
Nonaccrual Loans	782	787
Commercial and Industrial Financing Receivable | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,054	6,099
Current	34,412	42,738
Total originated loans	35,466	48,837
Real Estate Loan | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	15,140	12,479
Current	2,062,204	2,104,639
Total originated loans	2,077,344	2,117,118
More than 90 days Past Due and Accruing	153	1,696
Nonaccrual Loans	4,503	11,033
Real Estate Loan | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	14,530	30,386
Current	416,361	600,288
Total originated loans	430,891	630,674
More than 90 days Past Due and Accruing	522	44
Nonaccrual Loans	4,948	4,171
Real Estate Loan | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	29,151	48,984
Current	58,623	104,524
Total originated loans	87,774	153,508
Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total originated loans		339
Construction Loans | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,846	0
Current	643,491	537,766
Total originated loans	645,337	537,766	338,925
More than 90 days Past Due and Accruing	0	0
Nonaccrual Loans	482	0
Construction Loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	733	685
Current	5,380	6,286
Total originated loans	6,113	6,971
More than 90 days Past Due and Accruing	0	0
Nonaccrual Loans	0	0
Construction Loans | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,761	6,064
Current	2,108	3,198
Total originated loans	5,869	9,262
Commercial Leases Financing Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	491,741	370,179
Total originated loans	491,741	370,179
More than 90 days Past Due and Accruing	0	0
Nonaccrual Loans	0	0
Commercial Leases Financing Receivable | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total originated loans	0	0
Commercial Leases Financing Receivable | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total originated loans	0	0
Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total originated loans		25,880
Installment | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	26,682	22,984
Current	2,963,667	2,370,467
Total originated loans	2,990,349	2,393,451	1,727,925
More than 90 days Past Due and Accruing	3,519	3,695
Nonaccrual Loans	2,178	3,268
Installment | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,362	10,094
Current	566,010	754,074
Total originated loans	573,372	764,168
More than 90 days Past Due and Accruing	236	615
Nonaccrual Loans	835	1,218
Installment | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	57
Current	2,077	4,817
Total originated loans	2,077	4,874
Home Equity Loan | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,343	3,150
Current	1,244,095	1,107,186
Total originated loans	1,248,438	1,110,336
More than 90 days Past Due and Accruing	513	569
Nonaccrual Loans	1,674	1,654
Home Equity Loan | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,285	7,275
Current	165,257	226,354
Total originated loans	168,542	233,629
More than 90 days Past Due and Accruing	644	1,519
Nonaccrual Loans	514	631
Home Equity Loan | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,199	6,124
Current	34,469	67,241
Total originated loans	38,668	73,365
Credit Card Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total originated loans		854
Credit Card Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,575	2,044
Current	180,268	162,434
Total originated loans	182,843	164,478	148,313
More than 90 days Past Due and Accruing	725	407
Nonaccrual Loans	545	596
Reserve on residential mortgage loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total originated loans		27,218
Reserve on residential mortgage loans | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	19,311	22,843
Current	669,734	602,440
Total originated loans	689,045	625,283	$ 529,253
More than 90 days Past Due and Accruing	2,876	4,242
Nonaccrual Loans	11,600	11,952
Reserve on residential mortgage loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	16,119	21,799
Current	307,889	372,685
Total originated loans	324,008	394,484
More than 90 days Past Due and Accruing	1,681	1,293
Nonaccrual Loans	1,166	1,249
Reserve on residential mortgage loans | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,443	9,868
Current	28,125	31,408
Total originated loans	35,568	41,276
30 to 59 Days Past Due | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	51,358	33,099
30 to 59 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	18,687	25,656
30 to 59 Days Past Due | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,142	7,915
30 to 59 Days Past Due | Commercial and Industrial Financing Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,684	2,212
30 to 59 Days Past Due | Commercial and Industrial Financing Receivable | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	311	92
30 to 59 Days Past Due | Commercial and Industrial Financing Receivable | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	58
30 to 59 Days Past Due | Real Estate Loan | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	12,880	2,155
30 to 59 Days Past Due | Real Estate Loan | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,192	3,479
30 to 59 Days Past Due | Real Estate Loan | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	296	234
30 to 59 Days Past Due | Construction Loans | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,360	0
30 to 59 Days Past Due | Construction Loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
30 to 59 Days Past Due | Construction Loans | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
30 to 59 Days Past Due | Commercial Leases Financing Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
30 to 59 Days Past Due | Installment | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	17,934	14,621
30 to 59 Days Past Due | Installment | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,059	6,204
30 to 59 Days Past Due | Installment | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	23
30 to 59 Days Past Due | Home Equity Loan | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,952	1,357
30 to 59 Days Past Due | Home Equity Loan | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,365	2,819
30 to 59 Days Past Due | Home Equity Loan | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,230	1,395
30 to 59 Days Past Due | Credit Card Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,449	668
30 to 59 Days Past Due | Reserve on residential mortgage loans | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11,099	12,086
30 to 59 Days Past Due | Reserve on residential mortgage loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,760	13,062
30 to 59 Days Past Due | Reserve on residential mortgage loans | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,616	6,205
60 to 89 Days Past Due | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,869	10,116
60 to 89 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,268	9,432
60 to 89 Days Past Due | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	578	2,478
60 to 89 Days Past Due | Commercial and Industrial Financing Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	115	1,162
60 to 89 Days Past Due | Commercial and Industrial Financing Receivable | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	31	234
60 to 89 Days Past Due | Commercial and Industrial Financing Receivable | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
60 to 89 Days Past Due | Real Estate Loan | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	1,460
60 to 89 Days Past Due | Real Estate Loan | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,681	3,398
60 to 89 Days Past Due | Real Estate Loan | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	354	1,517
60 to 89 Days Past Due | Construction Loans | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
60 to 89 Days Past Due | Construction Loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
60 to 89 Days Past Due | Construction Loans | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
60 to 89 Days Past Due | Commercial Leases Financing Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
60 to 89 Days Past Due | Installment | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,828	3,647
60 to 89 Days Past Due | Installment | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,329	2,029
60 to 89 Days Past Due | Installment | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
60 to 89 Days Past Due | Home Equity Loan | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	913	587
60 to 89 Days Past Due | Home Equity Loan | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	660	2,123
60 to 89 Days Past Due | Home Equity Loan | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	52	870
60 to 89 Days Past Due | Credit Card Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	494	516
60 to 89 Days Past Due | Reserve on residential mortgage loans | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,519	2,744
60 to 89 Days Past Due | Reserve on residential mortgage loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	567	1,648
60 to 89 Days Past Due | Reserve on residential mortgage loans | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	172	91
Equal to Greater than 90 Days Past Due | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	24,293	26,329
Equal to Greater than 90 Days Past Due | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	22,752	40,268
Equal to Greater than 90 Days Past Due | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	37,888	66,803
Equal to Greater than 90 Days Past Due | Commercial and Industrial Financing Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,824	2,670
Equal to Greater than 90 Days Past Due | Commercial and Industrial Financing Receivable | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,336	4,791
Equal to Greater than 90 Days Past Due | Commercial and Industrial Financing Receivable | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,054	6,041
Equal to Greater than 90 Days Past Due | Real Estate Loan | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,260	8,864
Equal to Greater than 90 Days Past Due | Real Estate Loan | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9,657	23,509
Equal to Greater than 90 Days Past Due | Real Estate Loan | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	28,501	47,233
Equal to Greater than 90 Days Past Due | Construction Loans | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	486	0
Equal to Greater than 90 Days Past Due | Construction Loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	733	685
Equal to Greater than 90 Days Past Due | Construction Loans | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,761	6,064
Equal to Greater than 90 Days Past Due | Commercial Leases Financing Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Equal to Greater than 90 Days Past Due | Installment | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,920	4,716
Equal to Greater than 90 Days Past Due | Installment | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	974	1,861
Equal to Greater than 90 Days Past Due | Installment | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	34
Equal to Greater than 90 Days Past Due | Home Equity Loan | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,478	1,206
Equal to Greater than 90 Days Past Due | Home Equity Loan | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,260	2,333
Equal to Greater than 90 Days Past Due | Home Equity Loan | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,917	3,859
Equal to Greater than 90 Days Past Due | Credit Card Receivable | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	632	860
Equal to Greater than 90 Days Past Due | Reserve on residential mortgage loans | Originated Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,693	8,013
Equal to Greater than 90 Days Past Due | Reserve on residential mortgage loans | Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,792	7,089
Equal to Greater than 90 Days Past Due | Reserve on residential mortgage loans | Covered Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 2,655	$ 3,572

Loans (Financing Receivables Cr

Loans (Financing Receivables Credit Quality Indicators Table) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance		$ 130,458
Commercial and Industrial Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance		7,318
Construction Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance		339
Originated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	$ 14,118,505	12,493,812	$ 10,213,387
Originated Loans | Commercial and Industrial Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	5,793,408	5,175,201	4,139,567
Originated Loans | Commercial and Industrial Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	60,440	52,676
Originated Loans | Commercial and Industrial Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	353,581	186,278
Originated Loans | Commercial and Industrial Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,371,850	1,340,100
Originated Loans | Commercial and Industrial Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	3,756,333	3,413,446
Originated Loans | Commercial and Industrial Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	124,140	139,083
Originated Loans | Commercial and Industrial Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	124,483	43,618
Originated Loans | Commercial and Industrial Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	2,581	0
Originated Loans | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	2,077,344	2,117,118
Originated Loans | Real Estate Loan | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	773	683
Originated Loans | Real Estate Loan | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	831	3,454
Originated Loans | Real Estate Loan | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	319,987	294,281
Originated Loans | Real Estate Loan | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,697,261	1,745,470
Originated Loans | Real Estate Loan | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	18,388	29,990
Originated Loans | Real Estate Loan | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	40,105	43,240
Originated Loans | Real Estate Loan | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	(1)	0
Originated Loans | Construction Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	645,337	537,766	$ 338,925
Originated Loans | Construction Loans | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	678
Originated Loans | Construction Loans | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Originated Loans | Construction Loans | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	59,182	46,074
Originated Loans | Construction Loans | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	569,098	490,757
Originated Loans | Construction Loans | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	7,193	257
Originated Loans | Construction Loans | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	9,864	0
Originated Loans | Construction Loans | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Originated Loans | Commercial Leases Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	491,741	370,179
Originated Loans | Commercial Leases Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	12,732	4,451
Originated Loans | Commercial Leases Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	69,258	14,959
Originated Loans | Commercial Leases Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	49,956	71,908
Originated Loans | Commercial Leases Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	344,763	277,277
Originated Loans | Commercial Leases Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	7,858	1,389
Originated Loans | Commercial Leases Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	7,174	195
Originated Loans | Commercial Leases Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Originated Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	9,007,830	8,200,264
Originated Loans | Commercial | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	73,945	58,488
Originated Loans | Commercial | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	423,670	204,691
Originated Loans | Commercial | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,800,975	1,752,363
Originated Loans | Commercial | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	6,367,455	5,926,950
Originated Loans | Commercial | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	157,579	170,719
Originated Loans | Commercial | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	181,626	87,053
Originated Loans | Commercial | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	2,580	0
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,743,071	2,479,180
Acquired Loans | Commercial and Industrial Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	240,145	449,254
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	346	1,076
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	15,548	20,891
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	200,736	376,129
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	11,735	23,268
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	11,780	27,890
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	430,891	630,674
Acquired Loans | Real Estate Loan | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Real Estate Loan | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Real Estate Loan | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	27,387	24,867
Acquired Loans | Real Estate Loan | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	361,518	532,447
Acquired Loans | Real Estate Loan | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	12,546	28,382
Acquired Loans | Real Estate Loan | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	29,440	44,978
Acquired Loans | Real Estate Loan | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Construction Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	6,113	6,971
Acquired Loans | Construction Loans | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Construction Loans | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Construction Loans | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Construction Loans | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	5,380	6,286
Acquired Loans | Construction Loans | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	685
Acquired Loans | Construction Loans | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	733	0
Acquired Loans | Construction Loans | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	677,149	1,086,899
Acquired Loans | Commercial | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	346	1,076
Acquired Loans | Commercial | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	42,935	45,758
Acquired Loans | Commercial | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	567,634	914,862
Acquired Loans | Commercial | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	24,281	52,335
Acquired Loans | Commercial | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	41,953	72,868
Acquired Loans | Commercial | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	205,422	331,122
Covered Loans | Commercial and Industrial Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	35,466	48,837
Covered Loans | Commercial and Industrial Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial and Industrial Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,072	1,347
Covered Loans | Commercial and Industrial Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial and Industrial Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	31,637	36,406
Covered Loans | Commercial and Industrial Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	295	167
Covered Loans | Commercial and Industrial Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	2,462	10,917
Covered Loans | Commercial and Industrial Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	87,774	153,508
Covered Loans | Real Estate Loan | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Real Estate Loan | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Real Estate Loan | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	7,004	0
Covered Loans | Real Estate Loan | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	49,917	86,779
Covered Loans | Real Estate Loan | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	3,401
Covered Loans | Real Estate Loan | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	30,853	63,328
Covered Loans | Real Estate Loan | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Construction Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	5,869	9,262
Covered Loans | Construction Loans | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Construction Loans | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Construction Loans | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Construction Loans | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	819	823
Covered Loans | Construction Loans | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Construction Loans | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	5,050	8,248
Covered Loans | Construction Loans | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	191
Covered Loans | Commercial Leases Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	129,109	211,607
Covered Loans | Commercial | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,072	1,347
Covered Loans | Commercial | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	7,004	0
Covered Loans | Commercial | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	82,373	124,008
Covered Loans | Commercial | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	295	3,568
Covered Loans | Commercial | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	38,365	82,493
Covered Loans | Commercial | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	$ 0	$ 191

Loans (Narrative) (Details)

Loans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net deferred loan origination fees and costs	$ 4,100	$ 4,100	$ 5,400
Loans	16,076,945	$ 16,076,945	15,326,147
Time period for non-payment of loans that are placed on non-accrual status		90 days
Days past due for nonaccrual status credit card loans		120 days
Acquired Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance, including contractual principal, interest, fees and penalties, of all purchased loans	406,000	$ 406,000	590,900
Net reclassifications from nonaccretable to accretable, Accretable Yield		37,245	45,824
Covered impaired loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net reclassifications from nonaccretable to accretable, Accretable Yield	4,818		16,841
FDIC acquired loans covered by loss share agreement	323,700	323,700	$ 451,200
George Washington and Midwest Acquisitions | Non-Single Family Loss Share Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	129,100	129,100
George Washington and Midwest Acquisitions | Single Family Loss Share Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
FDIC acquired loans covered by loss share agreement	$ 76,300	$ 76,300

Allowance for Loan Losses (Sche

Allowance for Loan Losses (Schedule of Credit Losses Related to Originated Financing Receivables, Current and Non-Current) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, write-downs	$ (6,500)	$ (14,700)
Provision for loan losses	(45,100)	(52,279)	$ (33,684)
Total originated loans					$ 130,458
Commercial and Industrial Financing Receivable
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					7,318
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					45,648
Construction Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					339
Installment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					25,880
Home Equity Line of Credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					23,201
Credit Card Receivable
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					854
Residential Mortgages
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					27,218
Originated Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	95,696	96,484	98,942
Allowance for credit losses, write-downs	(48,778)	(44,923)	(40,173)
Recoveries	18,483	20,964	24,681
Provision for loan losses	39,734	23,171	13,034
Balance at the end of the period	105,135	95,696	96,484
Individually evaluated for impairment				$ 14,349	5,950	$ 6,146
Collectively evaluated for impairment				90,786	89,746	90,338
Allowance for credit losses	95,696	96,484	98,942	105,135	95,696	96,484
Originated loans individually evaluated for impairment				129,038	93,448	87,764
Originated loans collectively evaluated for impairment				13,989,467	12,400,364	10,125,623
Total originated loans				14,118,505	12,493,812	10,213,387
Originated Loans | Commercial and Industrial Financing Receivable
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	37,375	42,981	36,209
Allowance for credit losses, write-downs	(14,913)	(9,617)	(5,840)
Recoveries	1,196	3,872	7,981
Provision for loan losses	21,102	139	4,631
Balance at the end of the period	44,760	37,375	42,981
Individually evaluated for impairment				11,837	72	3,235
Collectively evaluated for impairment				32,923	37,303	39,746
Allowance for credit losses	37,375	42,981	36,209	44,760	37,375	42,981
Originated loans individually evaluated for impairment				43,818	11,759	8,053
Originated loans collectively evaluated for impairment				5,749,590	5,163,442	4,131,514
Total originated loans				5,793,408	5,175,201	4,139,567
Originated Loans | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	10,492	12,265	20,126
Allowance for credit losses, write-downs	(625)	(3,512)	(1,281)
Recoveries	517	515	524
Provision for loan losses	(753)	1,224	(7,104)
Balance at the end of the period	9,631	10,492	12,265
Individually evaluated for impairment				128	2,914	229
Collectively evaluated for impairment				9,503	7,578	12,036
Allowance for credit losses	10,492	12,265	20,126	9,631	10,492	12,265
Originated loans individually evaluated for impairment				16,614	23,300	20,616
Originated loans collectively evaluated for impairment				2,060,730	2,093,818	2,149,171
Total originated loans				2,077,344	2,117,118	2,169,787
Originated Loans | Construction Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	2,202	2,810	3,821
Allowance for credit losses, write-downs	0	0	(516)
Recoveries	178	39	507
Provision for loan losses	(786)	(647)	(1,002)
Balance at the end of the period	1,594	2,202	2,810
Individually evaluated for impairment				0	0	0
Collectively evaluated for impairment				1,594	2,202	2,810
Allowance for credit losses	2,202	2,810	3,821	1,594	2,202	2,810
Originated loans individually evaluated for impairment				0	0	906
Originated loans collectively evaluated for impairment				645,337	537,766	338,019
Total originated loans				645,337	537,766	338,925
Originated Loans | Leases
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	674	1,081	639
Allowance for credit losses, write-downs	(1,268)	0	(1,237)
Recoveries	787	379	100
Provision for loan losses	1,120	(786)	1,579
Balance at the end of the period	1,313	674	1,081
Individually evaluated for impairment				0	0	0
Collectively evaluated for impairment				1,313	674	1,081
Allowance for credit losses	674	1,081	639	1,313	674	1,081
Originated loans individually evaluated for impairment				0	0	0
Originated loans collectively evaluated for impairment				491,741	370,179	239,551
Total originated loans				491,741	370,179	239,551
Originated Loans | Installment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	12,918	11,935	11,154
Allowance for credit losses, write-downs	(21,630)	(20,328)	(16,683)
Recoveries	11,547	11,185	10,519
Provision for loan losses	11,348	10,126	6,945
Balance at the end of the period	14,183	12,918	11,935
Individually evaluated for impairment				1,009	1,178	1,014
Collectively evaluated for impairment				13,174	11,740	10,921
Allowance for credit losses	12,918	11,935	11,154	14,183	12,918	11,935
Originated loans individually evaluated for impairment				36,904	24,905	27,285
Originated loans collectively evaluated for impairment				2,953,445	2,368,546	1,700,640
Total originated loans				2,990,349	2,393,451	1,727,925
Originated Loans | Home Equity Line of Credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	19,324	12,900	13,724
Allowance for credit losses, write-downs	(4,032)	(4,831)	(7,172)
Recoveries	2,606	2,940	2,979
Provision for loan losses	2,196	8,315	3,369
Balance at the end of the period	20,094	19,324	12,900
Individually evaluated for impairment				188	207	223
Collectively evaluated for impairment				19,906	19,117	12,677
Allowance for credit losses	19,324	12,900	13,724	20,094	19,324	12,900
Originated loans individually evaluated for impairment				7,080	7,379	6,726
Originated loans collectively evaluated for impairment				1,241,358	1,102,957	913,340
Total originated loans				1,248,438	1,110,336	920,066
Originated Loans | Credit Card Receivable
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	7,966	7,740	7,384
Allowance for credit losses, write-downs	(4,867)	(4,604)	(5,541)
Recoveries	1,395	1,716	1,841
Provision for loan losses	4,337	3,114	4,056
Balance at the end of the period	8,831	7,966	7,740
Individually evaluated for impairment				243	296	312
Collectively evaluated for impairment				8,588	7,670	7,428
Allowance for credit losses	7,966	7,740	7,384	8,831	7,966	7,740
Originated loans individually evaluated for impairment				717	854	1,112
Originated loans collectively evaluated for impairment				182,126	163,624	147,201
Total originated loans				182,843	164,478	148,313
Originated Loans | Residential Mortgages
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	4,745	4,772	5,885
Allowance for credit losses, write-downs	(1,443)	(2,031)	(1,903)
Recoveries	257	318	230
Provision for loan losses	1,170	1,686	560
Balance at the end of the period	4,729	4,745	4,772
Individually evaluated for impairment				944	1,283	1,133
Collectively evaluated for impairment				3,785	3,462	3,639
Allowance for credit losses	$ 4,745	$ 4,772	$ 5,885	4,729	4,745	4,772
Originated loans individually evaluated for impairment				23,905	25,251	23,066
Originated loans collectively evaluated for impairment				665,140	600,032	506,187
Total originated loans				$ 689,045	$ 625,283	$ 529,253

Allowance for Loan Losses (Sc72

Allowance for Loan Losses (Schedule of Credit Losses Related to Acquired Financing Receivables) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision/(recapture) for loan losses	$ (45,100)	$ (52,279)	$ (33,684)
Acquired Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	7,457	741	0
Charge-offs	0	0	0
Recoveries	0	0	0
Provision/(recapture) for loan losses	(3,580)	6,716	741
Balance at the end of the period	$ 3,877	$ 7,457	$ 741

Allowance for Loan Losses (Sc73

Allowance for Loan Losses (Schedule of Credit Losses Related to Covered Financing Receivables, Current) (Details) - Covered Loans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of the period	$ 40,496	$ 44,027	$ 43,255
Net provision/(recapture) for loan losses before benefit attributable to FDIC loss share agreements	8,830	10,568	23,892
Net (benefit)/recapture attributable to FDIC loss share agreements	(6,373)	(2,920)	(10,790)
Net provision/(recapture) for loan losses	2,457	7,648	13,102
Increase/(decrease) in loss share receivable	6,373	2,920	10,790
Charge-offs	(4,647)	(14,099)	(23,120)
Balance at end of the period	$ 44,679	$ 40,496	$ 44,027

Allowance for Loan Losses (Impa

Allowance for Loan Losses (Impaired Financing Receivables) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		$ 6,645
Commercial and Industrial Financing Receivable
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		90
Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		3,172
Construction Loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		295
Installment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		1,243
Home Equity Line of Credit
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		243
Credit Card Receivable
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		296
Reserve on residential mortgage loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		1,306
Originated Loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 50,141	46,728
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	57,809	62,376
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	55,051	50,741
Impaired Financing Receivable, with Related Allowance, Recorded Investment	78,897	46,720
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	85,211	47,679
Individually evaluated for impairment	14,349	5,950	$ 6,146
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	62,887	44,367
Impaired Financing Receivable, Recorded Investment	129,038	93,448
Impaired Financing Receivable, Unpaid Principal Balance	143,020	110,055
Impaired Financing Receivable, Related Allowance	14,349	5,950
Impaired Financing Receivable, Average Recorded Investment	117,938	95,108
Originated Loans | Commercial and Industrial Financing Receivable
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	21,066	11,451
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	23,854	18,207
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	27,215	14,193
Impaired Financing Receivable, with Related Allowance, Recorded Investment	22,752	308
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	28,881	344
Individually evaluated for impairment	11,837	72	3,235
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	11,284	326
Originated Loans | Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	15,465	16,874
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	17,456	22,696
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	13,031	18,027
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,149	6,426
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,173	6,440
Individually evaluated for impairment	128	2,914	229
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	3,037	4,497
Originated Loans | Construction Loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Individually evaluated for impairment	0	0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	0
Originated Loans | Installment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,369	4,460
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,658	4,584
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,807	4,272
Impaired Financing Receivable, with Related Allowance, Recorded Investment	35,535	20,445
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	35,592	21,024
Individually evaluated for impairment	1,009	1,178	1,014
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	28,808	19,513
Originated Loans | Home Equity Line of Credit
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	670	1,723
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	919	1,754
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	999	1,792
Impaired Financing Receivable, with Related Allowance, Recorded Investment	6,410	5,656
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	6,411	5,875
Individually evaluated for impairment	188	207	223
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	6,382	5,944
Originated Loans | Credit Card Receivable
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	21	16
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	21	16
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	20	32
Impaired Financing Receivable, with Related Allowance, Recorded Investment	696	838
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	696	838
Individually evaluated for impairment	243	296	312
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	757	966
Originated Loans | Reserve on residential mortgage loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	11,550	12,204
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	13,901	15,119
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	11,979	12,425
Impaired Financing Receivable, with Related Allowance, Recorded Investment	12,355	13,047
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	12,458	13,158
Individually evaluated for impairment	944	1,283	$ 1,133
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	$ 12,619	$ 13,121

Allowance for Loan Losses (Trou

Allowance for Loan Losses (Troubled Debt Restructurings on Financing Receivables) (Details) $ in Thousands	Dec. 31, 2015USD ($)loans	Dec. 31, 2014USD ($)loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	2,402	2,494
Recorded Investment	$ 160,928	$ 130,458
Unpaid Principal Balance	$ 165,694	$ 173,976
Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	2,054	2,167
Recorded Investment	$ 116,364	$ 83,119
Unpaid Principal Balance	$ 122,044	$ 98,900
Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	262	216
Recorded Investment	$ 19,518	$ 12,100
Unpaid Principal Balance	$ 20,026	$ 12,474
Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	86	111
Recorded Investment	$ 25,046	$ 35,239
Unpaid Principal Balance	$ 23,624	$ 62,602
Commercial and Industrial Financing Receivable
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	27	51
Recorded Investment	$ 40,698	$ 7,318
Unpaid Principal Balance	$ 41,351	$ 15,495
Commercial and Industrial Financing Receivable | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	26	41
Recorded Investment	$ 33,087	$ 7,123
Unpaid Principal Balance	$ 33,740	$ 13,887
Commercial and Industrial Financing Receivable | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	1	2
Recorded Investment	$ 7,611	$ 18
Unpaid Principal Balance	$ 7,611	$ 19
Commercial and Industrial Financing Receivable | Covered Loans Commercial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	0	8
Recorded Investment	$ 0	$ 177
Unpaid Principal Balance	$ 0	$ 1,589
Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	30	94
Recorded Investment	$ 29,645	$ 45,648
Unpaid Principal Balance	$ 30,171	$ 67,466
Commercial Real Estate | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	24	67
Recorded Investment	$ 14,671	$ 17,607
Unpaid Principal Balance	$ 16,648	$ 22,645
Commercial Real Estate | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	3	3
Recorded Investment	$ 918	$ 2,542
Unpaid Principal Balance	$ 1,044	$ 2,595
Commercial Real Estate | Covered Loans Commercial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	3	24
Recorded Investment	$ 14,056	$ 25,499
Unpaid Principal Balance	$ 12,479	$ 42,226
Construction Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	1	40
Recorded Investment	$ 593	$ 339
Unpaid Principal Balance	$ 682	$ 9,552
Construction Loans | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	0	31
Recorded Investment	$ 0	$ 0
Unpaid Principal Balance	$ 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 | loans	1	9
Recorded Investment	$ 593	$ 339
Unpaid Principal Balance	$ 682	$ 9,552
Commercial Loan
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	58	185
Recorded Investment	$ 70,936	$ 53,305
Unpaid Principal Balance	$ 72,204	$ 92,513
Commercial Loan | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	50	139
Recorded Investment	$ 47,758	$ 24,730
Unpaid Principal Balance	$ 50,388	$ 36,532
Commercial Loan | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	4	5
Recorded Investment	$ 8,529	$ 2,560
Unpaid Principal Balance	$ 8,655	$ 2,614
Commercial Loan | Covered Loans Commercial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	4	41
Recorded Investment	$ 14,649	$ 26,015
Unpaid Principal Balance	$ 13,161	$ 53,367
Installment
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	1,274	1,245
Recorded Investment	$ 38,021	$ 25,880
Unpaid Principal Balance	$ 38,461	$ 26,662
Installment | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	1,223	1,205
Recorded Investment	$ 36,904	$ 24,905
Unpaid Principal Balance	$ 37,250	$ 25,608
Installment | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	51	40
Recorded Investment	$ 1,117	$ 975
Unpaid Principal Balance	$ 1,211	$ 1,054
Home Equity Line of Credit
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	514	483
Recorded Investment	$ 25,013	$ 23,201
Unpaid Principal Balance	$ 25,389	$ 23,513
Home Equity Line of Credit | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	257	270
Recorded Investment	$ 7,080	$ 7,379
Unpaid Principal Balance	$ 7,330	$ 7,629
Home Equity Line of Credit | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	176	145
Recorded Investment	$ 7,718	$ 6,932
Unpaid Principal Balance	$ 7,778	$ 6,983
Home Equity Line of Credit | Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	81	68
Recorded Investment	$ 10,215	$ 8,890
Unpaid Principal Balance	$ 10,281	$ 8,901
Credit Card Receivable
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	212	238
Recorded Investment	$ 717	$ 854
Unpaid Principal Balance	$ 717	$ 854
Credit Card Receivable | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	212	238
Recorded Investment	$ 717	$ 854
Unpaid Principal Balance	$ 717	$ 854
Reserve on residential mortgage loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	344	343
Recorded Investment	$ 26,241	$ 27,218
Unpaid Principal Balance	$ 28,923	$ 30,434
Reserve on residential mortgage loans | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	312	315
Recorded Investment	$ 23,905	$ 25,251
Unpaid Principal Balance	$ 26,359	$ 28,277
Reserve on residential mortgage loans | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	31	26
Recorded Investment	$ 2,154	$ 1,633
Unpaid Principal Balance	$ 2,382	$ 1,823
Reserve on residential mortgage loans | Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	1	2
Recorded Investment	$ 182	$ 334
Unpaid Principal Balance	$ 182	$ 334
Consumer Loan
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	2,344	2,309
Recorded Investment	$ 89,992	$ 77,153
Unpaid Principal Balance	$ 93,490	$ 81,463
Consumer Loan | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	2,004	2,028
Recorded Investment	$ 68,606	$ 58,389
Unpaid Principal Balance	$ 71,656	$ 62,368
Consumer Loan | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	258	211
Recorded Investment	$ 10,989	$ 9,540
Unpaid Principal Balance	$ 11,371	$ 9,860
Consumer Loan | Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	82	70
Recorded Investment	$ 10,397	$ 9,224
Unpaid Principal Balance	$ 10,463	$ 9,235

Allowance for Loan Losses (Accr

Allowance for Loan Losses (Accruing and Non-Accruing Troubled Debt Restructurings) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		$ 130,458
Troubled Debt Restructuring, Recorded Investment	$ 160,928	130,458
Impaired Financing Receivable, Related Allowance		6,645
Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	14,034,985	12,424,268
Financing Receivable, Recorded Investment, Past Due	83,520	69,544
Total originated loans	14,118,505	12,493,812	$ 10,213,387
Troubled Debt Restructuring, Recorded Investment	116,364	83,119
Impaired Financing Receivable, Related Allowance	14,349	5,950
Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,697,364	2,403,824
Financing Receivable, Recorded Investment, Past Due	45,707	75,356
Total originated loans	1,743,071	2,479,180
Troubled Debt Restructuring, Recorded Investment	19,518	12,100
Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		9,224
Troubled Debt Restructuring, Recorded Investment	25,046	35,239
Impaired Financing Receivable, Related Allowance		48
Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		35,239
Impaired Financing Receivable, Related Allowance		3,222
Commercial and Industrial Financing Receivable
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		7,318
Troubled Debt Restructuring, Recorded Investment	40,698	7,318
Impaired Financing Receivable, Related Allowance		90
Commercial and Industrial Financing Receivable | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	5,779,785	5,169,157
Financing Receivable, Recorded Investment, Past Due	13,623	6,044
Total originated loans	5,793,408	5,175,201	4,139,567
Troubled Debt Restructuring, Recorded Investment	33,087	7,123
Commercial and Industrial Financing Receivable | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	236,467	444,137
Financing Receivable, Recorded Investment, Past Due	3,678	5,117
Total originated loans	240,145	449,254
Troubled Debt Restructuring, Recorded Investment	7,611	18
Commercial and Industrial Financing Receivable | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		177
Impaired Financing Receivable, Related Allowance		0
Commercial Real Estate
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		45,648
Troubled Debt Restructuring, Recorded Investment	29,645	45,648
Impaired Financing Receivable, Related Allowance		3,172
Commercial Real Estate | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans	2,077,344	2,117,118	2,169,787
Troubled Debt Restructuring, Recorded Investment	14,671	17,607
Commercial Real Estate | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	918	2,542
Commercial Real Estate | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		25,499
Impaired Financing Receivable, Related Allowance		2,879
Construction Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		339
Troubled Debt Restructuring, Recorded Investment	593	339
Impaired Financing Receivable, Related Allowance		295
Construction Loans | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	643,491	537,766
Financing Receivable, Recorded Investment, Past Due	1,846	0
Total originated loans	645,337	537,766	338,925
Troubled Debt Restructuring, Recorded Investment	0	0
Construction Loans | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	5,380	6,286
Financing Receivable, Recorded Investment, Past Due	733	685
Total originated loans	6,113	6,971
Troubled Debt Restructuring, Recorded Investment	0
Construction Loans | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		339
Impaired Financing Receivable, Related Allowance		295
Commercial Loan
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		53,305
Troubled Debt Restructuring, Recorded Investment	70,936	53,305
Impaired Financing Receivable, Related Allowance		3,557
Commercial Loan | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	47,758	24,730
Commercial Loan | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	8,529	2,560
Commercial Loan | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		26,015
Impaired Financing Receivable, Related Allowance		3,174
Installment
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		25,880
Troubled Debt Restructuring, Recorded Investment	38,021	25,880
Impaired Financing Receivable, Related Allowance		1,243
Installment | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	2,963,667	2,370,467
Financing Receivable, Recorded Investment, Past Due	26,682	22,984
Total originated loans	2,990,349	2,393,451	1,727,925
Troubled Debt Restructuring, Recorded Investment	36,904	24,905
Installment | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	566,010	754,074
Financing Receivable, Recorded Investment, Past Due	7,362	10,094
Total originated loans	573,372	764,168
Troubled Debt Restructuring, Recorded Investment	1,117	975
Home Equity Line of Credit
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		23,201
Troubled Debt Restructuring, Recorded Investment	25,013	23,201
Impaired Financing Receivable, Related Allowance		243
Home Equity Line of Credit | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans	1,248,438	1,110,336	920,066
Troubled Debt Restructuring, Recorded Investment	7,080	7,379
Home Equity Line of Credit | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	7,718	6,932
Home Equity Line of Credit | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		8,890
Troubled Debt Restructuring, Recorded Investment	10,215	8,890
Impaired Financing Receivable, Related Allowance		27
Credit Card Receivable
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		854
Troubled Debt Restructuring, Recorded Investment	717	854
Impaired Financing Receivable, Related Allowance		296
Credit Card Receivable | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	180,268	162,434
Financing Receivable, Recorded Investment, Past Due	2,575	2,044
Total originated loans	182,843	164,478	148,313
Troubled Debt Restructuring, Recorded Investment	717	854
Reserve on residential mortgage loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		27,218
Troubled Debt Restructuring, Recorded Investment	26,241	27,218
Impaired Financing Receivable, Related Allowance		1,306
Reserve on residential mortgage loans | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	669,734	602,440
Financing Receivable, Recorded Investment, Past Due	19,311	22,843
Total originated loans	689,045	625,283	$ 529,253
Troubled Debt Restructuring, Recorded Investment	23,905	25,251
Reserve on residential mortgage loans | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	307,889	372,685
Financing Receivable, Recorded Investment, Past Due	16,119	21,799
Total originated loans	324,008	394,484
Troubled Debt Restructuring, Recorded Investment	2,154	1,633
Reserve on residential mortgage loans | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		334
Troubled Debt Restructuring, Recorded Investment	182	334
Impaired Financing Receivable, Related Allowance		21
Consumer Loan
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		77,153
Troubled Debt Restructuring, Recorded Investment	89,992	77,153
Impaired Financing Receivable, Related Allowance		3,088
Consumer Loan | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	68,606	58,389
Consumer Loan | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	10,989	9,540
Consumer Loan | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	10,397	9,224
Accruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	115,149	84,600
Financing Receivable, Recorded Investment, Past Due	21,461	26,792
Total originated loans	136,610	111,392
Accruing TDRs | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	87,694	62,333
Financing Receivable, Recorded Investment, Past Due	6,298	5,545
Total originated loans	93,992	67,878
Accruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	16,615	7,910
Financing Receivable, Recorded Investment, Past Due	1,037	694
Total originated loans	17,652	8,604
Accruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current		8,895
Financing Receivable, Recorded Investment, Past Due		0
Total originated loans		8,895
Accruing TDRs | Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	10,840	14,357
Financing Receivable, Recorded Investment, Past Due	14,126	20,553
Total originated loans	24,966	34,910
Accruing TDRs | Commercial and Industrial Financing Receivable
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	30,177	6,755
Financing Receivable, Recorded Investment, Past Due	107	177
Total originated loans	30,284	6,932
Accruing TDRs | Commercial and Industrial Financing Receivable | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	22,566	6,740
Financing Receivable, Recorded Investment, Past Due	107	0
Total originated loans	22,673	6,740
Accruing TDRs | Commercial and Industrial Financing Receivable | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	7,611	15
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	7,611	15
Accruing TDRs | Commercial and Industrial Financing Receivable | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0
Financing Receivable, Recorded Investment, Past Due	0	177
Total originated loans	0	177
Accruing TDRs | Commercial Real Estate
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	10,271	18,008
Financing Receivable, Recorded Investment, Past Due	16,303	21,328
Total originated loans	26,574	39,336
Accruing TDRs | Commercial Real Estate | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	10,271	12,885
Financing Receivable, Recorded Investment, Past Due	2,247	952
Total originated loans	12,518	13,837
Accruing TDRs | Commercial Real Estate | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	0	0
Accruing TDRs | Commercial Real Estate | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	5,123
Financing Receivable, Recorded Investment, Past Due	14,056	20,376
Total originated loans	14,056	25,499
Accruing TDRs | Construction Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	593	339
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	593	339
Accruing TDRs | Construction Loans | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	0	0
Accruing TDRs | Construction Loans | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0
Financing Receivable, Recorded Investment, Past Due	0
Total originated loans	0
Accruing TDRs | Construction Loans | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	593	339
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	593	339
Accruing TDRs | Commercial Loan
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	41,041	25,102
Financing Receivable, Recorded Investment, Past Due	16,410	21,505
Total originated loans	57,451	46,607
Accruing TDRs | Commercial Loan | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	32,837	19,625
Financing Receivable, Recorded Investment, Past Due	2,354	952
Total originated loans	35,191	20,577
Accruing TDRs | Commercial Loan | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	7,611	15
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	7,611	15
Accruing TDRs | Commercial Loan | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	593	5,462
Financing Receivable, Recorded Investment, Past Due	14,056	20,553
Total originated loans	14,649	26,015
Accruing TDRs | Installment
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	35,869	23,095
Financing Receivable, Recorded Investment, Past Due	920	813
Total originated loans	36,789	23,908
Accruing TDRs | Installment | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	34,902	22,254
Financing Receivable, Recorded Investment, Past Due	794	726
Total originated loans	35,696	22,980
Accruing TDRs | Installment | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	967	841
Financing Receivable, Recorded Investment, Past Due	126	87
Total originated loans	1,093	928
Accruing TDRs | Home Equity Line of Credit
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	23,517	20,986
Financing Receivable, Recorded Investment, Past Due	839	876
Total originated loans	24,356	21,862
Accruing TDRs | Home Equity Line of Credit | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	6,511	6,239
Financing Receivable, Recorded Investment, Past Due	114	269
Total originated loans	6,625	6,508
Accruing TDRs | Home Equity Line of Credit | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	6,941	6,186
Financing Receivable, Recorded Investment, Past Due	655	607
Total originated loans	7,596	6,793
Accruing TDRs | Home Equity Line of Credit | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	10,065	8,561
Financing Receivable, Recorded Investment, Past Due	70	0
Total originated loans	10,135	8,561
Accruing TDRs | Credit Card Receivable
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	575	775
Financing Receivable, Recorded Investment, Past Due	140	60
Total originated loans	715	835
Accruing TDRs | Credit Card Receivable | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	575	775
Financing Receivable, Recorded Investment, Past Due	140	60
Total originated loans	715	835
Accruing TDRs | Reserve on residential mortgage loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	14,147	14,642
Financing Receivable, Recorded Investment, Past Due	3,152	3,538
Total originated loans	17,299	18,180
Accruing TDRs | Reserve on residential mortgage loans | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	12,869	13,440
Financing Receivable, Recorded Investment, Past Due	2,896	3,538
Total originated loans	15,765	16,978
Accruing TDRs | Reserve on residential mortgage loans | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,096	868
Financing Receivable, Recorded Investment, Past Due	256	0
Total originated loans	1,352	868
Accruing TDRs | Reserve on residential mortgage loans | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	182	334
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	182	334
Accruing TDRs | Consumer Loan
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	74,108	59,498
Financing Receivable, Recorded Investment, Past Due	5,051	5,287
Total originated loans	79,159	64,785
Accruing TDRs | Consumer Loan | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	54,857	42,708
Financing Receivable, Recorded Investment, Past Due	3,944	4,593
Total originated loans	58,801	47,301
Accruing TDRs | Consumer Loan | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	9,004	7,895
Financing Receivable, Recorded Investment, Past Due	1,037	694
Total originated loans	10,041	8,589
Accruing TDRs | Consumer Loan | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	10,247
Financing Receivable, Recorded Investment, Past Due	70
Total originated loans	10,317
Nonaccruing TDRs
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	12,713	9,892
Financing Receivable, Recorded Investment, Past Due	11,605	9,174
Total originated loans	24,318	19,066
Nonaccruing TDRs | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	11,110	7,949
Financing Receivable, Recorded Investment, Past Due	11,262	7,292
Total originated loans	22,372	15,241
Nonaccruing TDRs | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,597	1,614
Financing Receivable, Recorded Investment, Past Due	269	1,882
Total originated loans	1,866	3,496
Nonaccruing TDRs | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current		329
Financing Receivable, Recorded Investment, Past Due		0
Total originated loans		329
Nonaccruing TDRs | Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	6	329
Financing Receivable, Recorded Investment, Past Due	74	0
Total originated loans	80	329
Nonaccruing TDRs | Commercial and Industrial Financing Receivable
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	4,229	3
Financing Receivable, Recorded Investment, Past Due	6,185	383
Total originated loans	10,414	386
Nonaccruing TDRs | Commercial and Industrial Financing Receivable | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	4,229	0
Financing Receivable, Recorded Investment, Past Due	6,185	383
Total originated loans	10,414	383
Nonaccruing TDRs | Commercial and Industrial Financing Receivable | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	3
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	0	3
Nonaccruing TDRs | Commercial and Industrial Financing Receivable | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	0	0
Nonaccruing TDRs | Commercial Real Estate
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,405	1,372
Financing Receivable, Recorded Investment, Past Due	1,666	4,940
Total originated loans	3,071	6,312
Nonaccruing TDRs | Commercial Real Estate | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	746	394
Financing Receivable, Recorded Investment, Past Due	1,407	3,376
Total originated loans	2,153	3,770
Nonaccruing TDRs | Commercial Real Estate | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	659	978
Financing Receivable, Recorded Investment, Past Due	259	1,564
Total originated loans	918	2,542
Nonaccruing TDRs | Commercial Real Estate | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	0	0
Nonaccruing TDRs | Construction Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	0	0
Nonaccruing TDRs | Construction Loans | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	0	0
Nonaccruing TDRs | Construction Loans | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0
Financing Receivable, Recorded Investment, Past Due	0
Total originated loans	0
Nonaccruing TDRs | Construction Loans | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	0	0
Nonaccruing TDRs | Commercial Loan
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	5,634	1,375
Financing Receivable, Recorded Investment, Past Due	7,851	5,323
Total originated loans	13,485	6,698
Nonaccruing TDRs | Commercial Loan | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	4,975	394
Financing Receivable, Recorded Investment, Past Due	7,592	3,759
Total originated loans	12,567	4,153
Nonaccruing TDRs | Commercial Loan | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	659	981
Financing Receivable, Recorded Investment, Past Due	259	1,564
Total originated loans	918	2,545
Nonaccruing TDRs | Commercial Loan | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	0	0
Nonaccruing TDRs | Installment
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,139	1,687
Financing Receivable, Recorded Investment, Past Due	93	285
Total originated loans	1,232	1,972
Nonaccruing TDRs | Installment | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	1,125	1,663
Financing Receivable, Recorded Investment, Past Due	83	262
Total originated loans	1,208	1,925
Nonaccruing TDRs | Installment | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	14	24
Financing Receivable, Recorded Investment, Past Due	10	23
Total originated loans	24	47
Nonaccruing TDRs | Home Equity Line of Credit
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	527	1,339
Financing Receivable, Recorded Investment, Past Due	130	0
Total originated loans	657	1,339
Nonaccruing TDRs | Home Equity Line of Credit | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	399	871
Financing Receivable, Recorded Investment, Past Due	56	0
Total originated loans	455	871
Nonaccruing TDRs | Home Equity Line of Credit | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	122	139
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	122	139
Nonaccruing TDRs | Home Equity Line of Credit | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	6	329
Financing Receivable, Recorded Investment, Past Due	74	0
Total originated loans	80	329
Nonaccruing TDRs | Credit Card Receivable
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	15
Financing Receivable, Recorded Investment, Past Due	2	4
Total originated loans	2	19
Nonaccruing TDRs | Credit Card Receivable | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	15
Financing Receivable, Recorded Investment, Past Due	2	4
Total originated loans	2	19
Nonaccruing TDRs | Reserve on residential mortgage loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	5,413	5,476
Financing Receivable, Recorded Investment, Past Due	3,529	3,562
Total originated loans	8,942	9,038
Nonaccruing TDRs | Reserve on residential mortgage loans | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	4,611	5,006
Financing Receivable, Recorded Investment, Past Due	3,529	3,267
Total originated loans	8,140	8,273
Nonaccruing TDRs | Reserve on residential mortgage loans | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	802	470
Financing Receivable, Recorded Investment, Past Due	0	295
Total originated loans	802	765
Nonaccruing TDRs | Reserve on residential mortgage loans | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Total originated loans	0	0
Nonaccruing TDRs | Consumer Loan
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	7,079	8,517
Financing Receivable, Recorded Investment, Past Due	3,754	3,851
Total originated loans	10,833	12,368
Nonaccruing TDRs | Consumer Loan | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	6,135	7,555
Financing Receivable, Recorded Investment, Past Due	3,670	3,533
Total originated loans	9,805	11,088
Nonaccruing TDRs | Consumer Loan | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	938	633
Financing Receivable, Recorded Investment, Past Due	10	318
Total originated loans	948	951
Nonaccruing TDRs | Consumer Loan | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Financing Receivable, Recorded Investment, Current	6
Financing Receivable, Recorded Investment, Past Due	74
Total originated loans	80
Total Tdr Allowance
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Impaired Financing Receivable, Related Allowance	11,128
Total Tdr Allowance | Originated Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		83,119
Troubled Debt Restructuring, Recorded Investment	116,364
Impaired Financing Receivable, Related Allowance	8,456	3,195
Total Tdr Allowance | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		12,100
Troubled Debt Restructuring, Recorded Investment	19,518
Impaired Financing Receivable, Related Allowance	316	228
Total Tdr Allowance | Covered TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	25,046
Impaired Financing Receivable, Related Allowance	2,356
Total Tdr Allowance | Commercial and Industrial Financing Receivable
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	40,698
Impaired Financing Receivable, Related Allowance	6,052
Total Tdr Allowance | Commercial and Industrial Financing Receivable | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		7,123
Troubled Debt Restructuring, Recorded Investment	33,087
Impaired Financing Receivable, Related Allowance	6,052	72
Total Tdr Allowance | Commercial and Industrial Financing Receivable | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		18
Troubled Debt Restructuring, Recorded Investment	7,611
Impaired Financing Receivable, Related Allowance	0	18
Total Tdr Allowance | Commercial and Industrial Financing Receivable | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	0
Impaired Financing Receivable, Related Allowance	0
Total Tdr Allowance | Commercial Real Estate
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	29,645
Impaired Financing Receivable, Related Allowance	2,554
Total Tdr Allowance | Commercial Real Estate | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		17,607
Troubled Debt Restructuring, Recorded Investment	14,671
Impaired Financing Receivable, Related Allowance	20	159
Total Tdr Allowance | Commercial Real Estate | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		2,542
Troubled Debt Restructuring, Recorded Investment	918
Impaired Financing Receivable, Related Allowance	201	134
Total Tdr Allowance | Commercial Real Estate | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	14,056
Impaired Financing Receivable, Related Allowance	2,333
Total Tdr Allowance | Construction Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	593
Impaired Financing Receivable, Related Allowance	0
Total Tdr Allowance | Construction Loans | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		0
Troubled Debt Restructuring, Recorded Investment	0
Impaired Financing Receivable, Related Allowance	0	0
Total Tdr Allowance | Construction Loans | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	0
Impaired Financing Receivable, Related Allowance	0
Total Tdr Allowance | Construction Loans | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	593
Impaired Financing Receivable, Related Allowance	0
Total Tdr Allowance | Commercial Loan
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	70,936
Impaired Financing Receivable, Related Allowance	8,606
Total Tdr Allowance | Commercial Loan | Originated Loans Commercial
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		24,730
Troubled Debt Restructuring, Recorded Investment	47,758
Impaired Financing Receivable, Related Allowance	6,072	231
Total Tdr Allowance | Commercial Loan | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		2,560
Troubled Debt Restructuring, Recorded Investment	8,529
Impaired Financing Receivable, Related Allowance	201	152
Total Tdr Allowance | Commercial Loan | Covered Commercial TDR Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	14,649
Impaired Financing Receivable, Related Allowance	2,333
Total Tdr Allowance | Installment
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	38,021
Impaired Financing Receivable, Related Allowance	1,054
Total Tdr Allowance | Installment | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		24,905
Troubled Debt Restructuring, Recorded Investment	36,904
Impaired Financing Receivable, Related Allowance	1,009	1,178
Total Tdr Allowance | Installment | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		975
Troubled Debt Restructuring, Recorded Investment	1,117
Impaired Financing Receivable, Related Allowance	45	65
Total Tdr Allowance | Home Equity Line of Credit
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	25,013
Impaired Financing Receivable, Related Allowance	281
Total Tdr Allowance | Home Equity Line of Credit | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		7,379
Troubled Debt Restructuring, Recorded Investment	7,080
Impaired Financing Receivable, Related Allowance	188	207
Total Tdr Allowance | Home Equity Line of Credit | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		6,932
Troubled Debt Restructuring, Recorded Investment	7,718
Impaired Financing Receivable, Related Allowance	70	9
Total Tdr Allowance | Home Equity Line of Credit | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	10,215
Impaired Financing Receivable, Related Allowance	23
Total Tdr Allowance | Credit Card Receivable
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	717
Impaired Financing Receivable, Related Allowance	243
Total Tdr Allowance | Credit Card Receivable | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		854
Troubled Debt Restructuring, Recorded Investment	717
Impaired Financing Receivable, Related Allowance	243	296
Total Tdr Allowance | Reserve on residential mortgage loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	26,241
Impaired Financing Receivable, Related Allowance	944
Total Tdr Allowance | Reserve on residential mortgage loans | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		25,251
Troubled Debt Restructuring, Recorded Investment	23,905
Impaired Financing Receivable, Related Allowance	944	1,283
Total Tdr Allowance | Reserve on residential mortgage loans | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		1,633
Troubled Debt Restructuring, Recorded Investment	2,154
Impaired Financing Receivable, Related Allowance	0	2
Total Tdr Allowance | Reserve on residential mortgage loans | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	182
Impaired Financing Receivable, Related Allowance	0
Total Tdr Allowance | Consumer Loan
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	89,992
Impaired Financing Receivable, Related Allowance	2,522
Total Tdr Allowance | Consumer Loan | Originated Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		58,389
Troubled Debt Restructuring, Recorded Investment	68,606
Impaired Financing Receivable, Related Allowance	2,384	2,964
Total Tdr Allowance | Consumer Loan | Acquired Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Total originated loans		9,540
Troubled Debt Restructuring, Recorded Investment	10,989
Impaired Financing Receivable, Related Allowance	115	$ 76
Total Tdr Allowance | Consumer Loan | Covered Consumer Loans
Accruing and Nonaccruing Troubled Debt Restructurings [Line Items]
Troubled Debt Restructuring, Recorded Investment	10,397
Impaired Financing Receivable, Related Allowance	$ 23

Allowance for Loan Losses (Sc77

Allowance for Loan Losses (Schedule of Debtor Troubled Debt Restructuring, Current Period) (Details) $ in Thousands	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	22	51
Subsequent default, recorded investment at period end	$ 573	$ 6,338
Commercial and Industrial Financing Receivable
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	4
Subsequent default, recorded investment at period end	$ 0	$ 5,357
Commercial and Industrial Financing Receivable | Originated Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	3
Subsequent default, recorded investment at period end	$ 0	$ 4,930
Commercial and Industrial Financing Receivable | Covered Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	1
Subsequent default, recorded investment at period end	$ 0	$ 427
Commercial Real Estate
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	1
Subsequent default, recorded investment at period end	$ 0	$ 363
Commercial Real Estate | Originated Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	1
Subsequent default, recorded investment at period end	$ 0	$ 363
Commercial Real Estate | Covered Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	0
Subsequent default, recorded investment at period end	$ 0	$ 0
Construction Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	0
Subsequent default, recorded investment at period end	$ 0	$ 0
Construction Loans | Originated Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	0
Subsequent default, recorded investment at period end	$ 0	$ 0
Construction Loans | Covered Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	0
Subsequent default, recorded investment at period end	$ 0	$ 0
Consumer Loan
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	22	46
Subsequent default, recorded investment at period end	$ 573	$ 618
Consumer Loan | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	18	43
Subsequent default, recorded investment at period end	$ 164	$ 392
Consumer Loan | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	3	3
Subsequent default, recorded investment at period end	$ 166	$ 226
Reserve on residential mortgage loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	3
Subsequent default, recorded investment at period end	$ 0	$ 183
Reserve on residential mortgage loans | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	3
Subsequent default, recorded investment at period end	$ 0	$ 183
Reserve on residential mortgage loans | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	0
Subsequent default, recorded investment at period end	$ 0	$ 0
Credit Card Receivable
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	10	28
Subsequent default, recorded investment at period end	$ 51	$ 140
Credit Card Receivable | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	10	28
Subsequent default, recorded investment at period end	$ 51	$ 140
Home Equity Line of Credit
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	2	2
Subsequent default, recorded investment at period end	$ 348	$ 90
Home Equity Line of Credit | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	1
Subsequent default, recorded investment at period end	$ 0	$ 29
Home Equity Line of Credit | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	1	1
Subsequent default, recorded investment at period end	$ 105	$ 61
Commercial Loan
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	5
Subsequent default, recorded investment at period end	$ 0	$ 5,720
Commercial Loan | Originated Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	4
Subsequent default, recorded investment at period end	$ 0	$ 5,293
Commercial Loan | Covered Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	0	1
Subsequent default, recorded investment at period end	$ 0	$ 427
Installment
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	10	13
Subsequent default, recorded investment at period end	$ 174	$ 205
Installment | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	8	11
Subsequent default, recorded investment at period end	$ 113	$ 40
Installment | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Subsequent default, number of contracts at period end	2	2
Subsequent default, recorded investment at period end	$ 61	$ 165

Allowance for Loan Losses (Narr

Allowance for Loan Losses (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum non-performing substandard loans outstanding for allowance for credit losses	$ 300
Minimum non-performing substandard doubtful loans outstanding for allowance for credit losses	100
Allowance for credit losses, write-downs	6,500	$ 14,700
Impaired financing receivable, interest income, cash basis method	600	900	$ 1,300
Loans and leases receivable, impaired, interest lost on nonaccrual loans	3,200	2,800	$ 5,500
Loan commitments	6,385,147	6,136,313
Total impaired loans with no related allowance
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan commitments	$ 7,000	$ 200

Goodwill and Other Intangible79

Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 741,740	$ 741,740
Amortization of intangible assets	$ 10,392	$ 11,735	$ 8,392

Goodwill and Other Intangible80

Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill	$ 741,740	$ 741,740
Commercial
Goodwill [Line Items]
Goodwill	527,406	527,406
Retail
Goodwill [Line Items]
Goodwill	193,961	193,961
Wealth
Goodwill [Line Items]
Goodwill	$ 20,373	$ 20,373

Goodwill and Other Intangible81

Goodwill and Other Intangible Assets (Accumulated Amortization of Intangible Asset Schedule) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accumulated amortization of intangible assets
Gross Carrying Amount	$ 96,561	$ 96,561
Accumulated Amortization	(35,933)	(25,541)
Net Carrying Amount	60,628	71,020
Core Deposits
Accumulated amortization of intangible assets
Gross Carrying Amount	82,323	82,323
Accumulated Amortization	(28,304)	(19,996)
Net Carrying Amount	54,019	62,327
Lease Agreements
Accumulated amortization of intangible assets
Gross Carrying Amount	238	238
Accumulated Amortization	(212)	(176)
Net Carrying Amount	26	62
Customer Relationships
Accumulated amortization of intangible assets
Gross Carrying Amount	14,000	14,000
Accumulated Amortization	(7,417)	(5,369)
Net Carrying Amount	$ 6,583	$ 8,631
Estimated useful life	12 years
Minimum | Core Deposits
Accumulated amortization of intangible assets
Estimated useful life	10 years
Maximum | Core Deposits
Accumulated amortization of intangible assets
Estimated useful life	15 years

Goodwill and Other Intangible82

Goodwill and Other Intangible Assets (Schedule of Expected Amortization Expense) (Details) $ in Thousands	Dec. 31, 2015USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
December 31, 2016	$ 9,209
December 31, 2017	8,161
December 31, 2018	7,273
December 31, 2019	6,500
December 31, 2020	5,214
Total estimated future amortization	$ 36,357

Mortgage Servicing Rights and83

Mortgage Servicing Rights and Mortgage Servicing Activity (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Servicing Assets at Fair Value [Line Items]
Principal Amount Outstanding of Loans Held-in-portfolio	$ 76.7	$ 356.5
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale, Gain (Loss) on Sale	1.2	7.2
Qualitative and Quantitative Information, Transferor's Continuing Involvement, Principal Amount Outstanding, Continued Recognition, Amount	$ 60.3	314.4
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%
Reserve on residential mortgage loans
Servicing Assets at Fair Value [Line Items]
Servicing Asset	$ 2,400	2,600
Contractually Specified Servicing Fees, Amount	$ 6.3	$ 6.6	$ 6.4

Mortgage Servicing Rights and84

Mortgage Servicing Rights and Mortgage Servicing Activity (Changes in the Carrying Amount of Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Mortage Servicing Rights Amortized Value [Roll Forward]
Mortgage Servicing Rights Beginning of Period	$ 22,011	$ 22,760	$ 21,316
Mortgage Servicing Rights Additions	619	3,049	4,952
Amortization of Mortgage Servicing Rights (MSRs)	(3,693)	(3,798)	(4,573)
Mortgage Servicing Rights, End of Period	18,937	22,011	22,760
Mortage Servicing Rights Valuation Rollforward [Roll Forward]
Mortgage Servicing rights Valuation Allowance Beginning of Period	(955)	(282)	(2,564)
Mortgage Servicing Rights (MSR) Impairment (Recovery)	556	(673)	2,282
Mortgage Servicing rights Valuation Allowance, End of Period	(399)	(955)	(282)
MSRs, net carrying balance	18,538	21,056	22,478
Fair value at end of period	19,149	21,228	23,041
Mortgage Servicing Rights | Citizens Republic Bancorp
Mortage Servicing Rights Amortized Value [Roll Forward]
Addition of Citizens' MSR's on Acquisition Date	$ 0	$ 0	$ 1,065

Mortgage Servicing Rights and85

Mortgage Servicing Rights and Mortgage Servicing Activity (Changes In Key Economic Assumptions) (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2015USD ($)
Transfers and Servicing [Abstract]
Prepayment speed assumption (annual CPR)	10.93%
Decrease in fair value from 10% adverse change	$ 1,032	$ 1,032
Decrease in fair value from 25% adverse change	$ 1,292	1,292
Discount rate assumption	9.39%
Decrease in fair value from 100 basis point adverse change	$ 599	599
Decrease in fair value from 200 basis point adverse change	$ 1,155	$ 1,155
Expected weighted-average life		97 months 18 days

Mortgage Servicing Rights and86

Mortgage Servicing Rights and Mortgage Servicing Activity (Estimated Amortization Expense for Mortgage Servicing Rights) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Transfers and Servicing [Abstract]
2,016	$ 3,075
2,017	2,723
2,018	2,281
2,019	1,917
2,020	1,608
more than 5 years	6,934
Total estimated future amortization	$ 18,538

Restrictions on Cash and Divi87

Restrictions on Cash and Dividends (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Restrictions on Cash and Dividends [Abstract]
Average Balance On Deposit To Satisfy Reserve Requirements	$ 15.3	$ 5.9
Cash And Due Deposited With The Federal Reserve Bank	$ 0.3

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Depreciation, Amortization and Accretion, Net	$ 40,700	$ 37,600	$ 32,200
Premises and Equipment [Line Items]
Premises and Equipment, gross	690,224	674,380
Less accumulated depreciation and amortization	370,736	342,083
Premises and Equipment, net	319,488	332,297
Land
Premises and Equipment [Line Items]
Premises and Equipment, gross	57,040	60,397
Buildings
Premises and Equipment [Line Items]
Premises and Equipment, gross	$ 309,754	308,144
Buildings | Minimum
Premises and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	10 years
Buildings | Maximum
Premises and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	35 years
Equipment
Premises and Equipment [Line Items]
Premises and Equipment, gross	$ 182,385	176,906
Equipment | Minimum
Premises and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3 years
Equipment | Maximum
Premises and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	15 years
Leasehold improvements
Premises and Equipment [Line Items]
Premises and Equipment, gross	$ 24,765	25,151
Leasehold improvements | Minimum
Premises and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	1 year
Leasehold improvements | Maximum
Premises and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	20 years
Software
Premises and Equipment [Line Items]
Premises and Equipment, gross	$ 116,280	$ 103,782
Software | Minimum
Premises and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3 years
Software | Maximum
Premises and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	7 years

Certificates and Other Time D89

Certificates and Other Time Deposits (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Certificates and Other Deposits [Abstract]
Time Deposits, $100,000 or More	$ 794.8	$ 716.5	$ 882.4
Interest Expense, Time Deposits, $100,000 or More	$ 3.1	$ 3.8	$ 4.5

Certificates and Other Time D90

Certificates and Other Time Deposits (Maturities of Certificates and Other Time Deposits) (Details) $ in Thousands	Dec. 31, 2015USD ($)
Time Deposits [Abstract]
2,016	$ 1,525,838
2,017	407,919
2,018	124,610
2,019	103,921
2,020	73,131
2021 and after	3,484
Total certificates and other time deposits	$ 2,238,903

Federal Funds Purchased and S91

Federal Funds Purchased and Securities Sold Under Agreements to Repurchase (Schedule of Federal Funds Purchased and Securities Sold Under Agreements to Repurchase and Wholesale Borrowings) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Federal funds purchased and securities sold under agreements to repurchase	$ 1,037,075	$ 1,272,591

Federal Funds Purchased and S92

Federal Funds Purchased and Securities Sold Under Agreements to Repurchase (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	$ 813.3	$ 888.4

Federal Funds Purchased and S93

Federal Funds Purchased and Securities Sold Under Agreements to Repurchase (Schedule of Select Financial Data Federal Funds Purchased and Securities Sold Under Agreements to Repurchase) (Details) - Federal Funds Purchased and Securities Sold under Agreements to Repurchase - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Average balance during the year	$ 1,138,307	$ 1,084,532	$ 949,068
Weighted-average annual interest rate during the year	0.10%	0.09%	0.13%
Maximum month-end balance	$ 1,519,250	$ 1,289,460	$ 1,123,795

Borrowed Funds (Narrative) (Det

Borrowed Funds (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Nov. 25, 2014
Debt Instrument [Line Items]
Collateral pledged	$ 5,100	$ 5,100
Interest Rate, Range from	0.34%
Interest Rate, Range to	4.12%
Subordinate debentures | Subordinated Notes Due 2026
Debt Instrument [Line Items]
Face amount			$ 250
Stated percentage			4.27%
Citizens Republic Bancorp
Debt Instrument [Line Items]
Aggregate liquidation amount outstanding		74.5
Citizens Republic Bancorp | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate	11.75%
VIE 2
Debt Instrument [Line Items]
Stated percentage	3.10%
VIE 2 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Description of variable rate basis	LIBOR
Aggregate liquidation amount outstanding		25.8
VIE 1
Debt Instrument [Line Items]
Stated percentage	7.50%
Aggregate liquidation amount outstanding		$ 48.7

Borrowed Funds (Wholesale Borro

Borrowed Funds (Wholesale Borrowings and Long-term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total	$ 1,085,821	$ 933,263
FHLB advances
Debt Instrument [Line Items]
Total	580,501	427,857
Subordinate debentures
Debt Instrument [Line Items]
Total	505,173	505,192
Wholesale Borrowings
Debt Instrument [Line Items]
Total	$ 147	$ 214

Borrowed Funds (Selected Inform

Borrowed Funds (Selected Information Pertaining to the Corporation's Borrowed Funds) (Details) - Wholesale Borrowings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Average balance during the year	$ 885,478	$ 715,383	$ 474,473
Weighted-average annual interest rate during the year	2.35%	2.80%	3.62%
Maximum month-end balance	$ 1,189,093	$ 973,453	$ 527,155

Borrowed Funds (Wholesale Bor97

Borrowed Funds (Wholesale Borrowings Schedule of Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
One year or less	$ 310,787
One to three years	230,269
Three to five years	0
Over five years	544,765
Total	1,085,821	$ 933,263
FHLB advances
Debt Instrument [Line Items]
One year or less	310,716
One to three years	230,193
Three to five years	0
Over five years	39,592
Total	580,501	427,857
Subordinate debentures
Debt Instrument [Line Items]
One year or less	0
One to three years	0
Three to five years	0
Over five years	505,173
Total	505,173	505,192
Wholesale Borrowings
Debt Instrument [Line Items]
One year or less	71
One to three years	76
Three to five years	0
Over five years	0
Total	$ 147	$ 214

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax [Line Items]
Income tax expense	$ 97,019,000	$ 101,943,000	$ 79,507,000
Federal NOL carryforwards	102,194,000	131,195,000
General business tax credit carryforward	2,924,000	1,982,000
Alternative minimum tax credit carryforward	112,861,000	83,428,000
State and local income taxes, amount	$ 450,000
Decrease resulting from current period tax positions	15.00%
Effective tax rate If fully recognized	29.71%
Expiration of Statues of Limitation
Income Tax [Line Items]
Significant change in unrecognized tax benefits is Reasonably possible, amount of unrecorded benefits	$ 50,000
2013 Tax Filings
Income Tax [Line Items]
Significant change in unrecognized tax benefits is Reasonably possible, amount of unrecorded benefits	200,000
Net-worth Taxes
Income Tax [Line Items]
Income tax expense	8,100,000	$ 8,200,000	$ 9,900,000
Federal
Income Tax [Line Items]
Federal NOL carryforwards	$ 292,000,000

Income Taxes (Schedule of Compo

Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal	$ 52,869	$ 52,514	$ 24,426
State	(3,119)	4,763	3,496
Deferred expense	47,269	44,666	51,585
Total income tax expense	$ 97,019	$ 101,943	$ 79,507

Income Taxes (Schedule of Effec

Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Statutory rate	35.00%	35.00%	35.00%
Increase (decrease) in rate due to:
Interest on tax-exempt securities and tax-free loans, net	(2.75%)	(2.77%)	(3.16%)
Merger expenses at acquisition	0.00%	0.00%	0.54%
Reduction in excess tax reserves	0.00%	0.00%	0.11%
Bank owned life insurance	(1.76%)	(2.10%)	(2.53%)
State income tax (net)	0.59%	0.91%	0.87%
Tax credits	(0.82%)	(0.96%)	(1.06%)
ESOP Dividends	(0.14%)	(0.13%)	(0.14%)
Nondeductible meals and entertainment	0.25%	0.22%	0.27%
Other	(0.66%)	(0.18%)	0.31%
Effective tax rates	29.71%	29.99%	30.21%

Income Taxes (Schedule of Defer

Income Taxes (Schedule of Deferred Income Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets, Gross [Abstract]
Allowance for credit losses	$ 40,069	$ 35,760
Employee benefits	50,868	51,584
Real Estate Mortgage Investment Credit	3,791	4,831
Acquired liabilities	5,931	6,296
Acquired loans	25,388	51,701
Available for sale securities	11,475	3,862
Loan fees and expenses	0	0
Federal NOL carryforwards	102,194	131,195
Alternative minimum tax credit carryforward	112,861	83,428
General business tax credit carryforward	2,924	1,982
State income tax (net of federal benefit)	2,441	1,970
Other	1,789	467
Total deferred tax assets	359,731	373,076
Deferred tax liabilities:
Leased assets and depreciation	(41,649)	(24,699)
FHLB stock	(18,641)	(18,165)
Loan fees and expenses	(1,480)	(2,537)
Goodwill	(26,885)	(16,580)
Core deposit intangibles	(18,697)	(22,013)
Other	0	0
Total deferred tax liabilities	(107,352)	(83,994)
Total net deferred tax asset	$ 252,379	$ 289,082

Income Taxes (Change in Deferre

Income Taxes (Change in Deferred Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Period Change in Deferred Taxes [Line Items]
Deferred tax changes reflected in other comprehensive income	$ (10,565)	$ (2,698)	$ (27,285)
Deferred tax changes reflected in Federal income tax expense	47,269	44,666
Net decrease/(increase) in DTA	$ 36,704	$ 41,968

Income Taxes (Summary of Income

Income Taxes (Summary of Income Tax Contingencies) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of period	$ 324	$ 1,265
Additions for tax provisions related to prior year	316	812
Reduction for tax positions related to prior year due closed tax years	0	(34)
Reduction for tax positions related to prior tax years	(134)	(1,719)
State income tax exposure	506	324
Balance at end of period	506	324
Federal and State Tax
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of period	305	1,003
Additions for tax provisions related to prior year	299	798
Reduction for tax positions related to prior year due closed tax years	0	(31)
Reduction for tax positions related to prior tax years	(134)	(1,465)
State income tax exposure	470	305
Balance at end of period	470	305
Accrued Interest and Penalties
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of period	19	262
Additions for tax provisions related to prior year	17	14
Reduction for tax positions related to prior year due closed tax years	0	(3)
Reduction for tax positions related to prior tax years	0	(254)
State income tax exposure	36	19
Balance at end of period	$ 36	$ 19

Benefit Plans (Narratives) (Det

Benefit Plans (Narratives) (Details)	May. 13, 2015USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Jan. 01, 2016USD ($)
Defined Benefit Plan Disclosure [Line Items]
Pension plan transition contribution		$ 900,000	$ 700,000
Employer limit to medical contributions, percent		200.00%
Age limit for subsidized retiree coverage		65
Sunset period of subsidized coverage		3 years
Participating executive election to defer, percent		1.00%
Noncurrent deferred compensation liability		$ 18,600,000	$ 19,000,000
Employer matching contribution, percent of match for first three percent		100.00%	100.00%
Employer matching contribution, percent of match for subsequent two percent		50.00%	50.00%
Repurchase of common stock warrant	$ (12,200,000)	$ (12,150,000)	$ 0	$ 0
Postretirement Life Insurance | Subsequent Event | Maximum
Defined Benefit Plan Disclosure [Line Items]
Amended life insurance cap					$ 10,000
FirstMerit | Savings Plan, 401k
Defined Benefit Plan Disclosure [Line Items]
Employer contributions		7,600,000	$ 7,700,000	$ 4,400,000
Citizens Republic Bancorp | Savings Plan, 401k
Defined Benefit Plan Disclosure [Line Items]
Employer contributions		$ 1,100,000
Employer matching contribution, percent of match for first two percent		50.00%
Employer matching contribution, percent of match for subsequent six percent		25.00%

Benefit Plans (Schedule of Net

Benefit Plans (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Total recognized in AOCI, before income taxes	$ (6,308)	$ 44,255	$ (52,375)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	830	728	2,339
Interest cost	14,069	14,337	12,814
Expected return on assets	(15,607)	(16,035)	(14,938)
Amortization of prior service cost/(credit)	2,279	2,599	467
Amortization of actuarial (gains)/losses	4,227	2,930	4,693
Curtailment gain	0	0	(524)
Net periodic cost (benefit)	5,798	4,559	4,851
Current year actuarial losses/(gains)	7,987	49,488	(47,257)
Cumulative net loss	(4,227)	(2,930)	(4,169)
Amortization of prior service cost/(credit)	(2,279)	(2,599)	(467)
Total recognized in AOCI, before income taxes	1,481	43,959	(51,893)
Total recognized in net periodic cost and AOCI	7,279	48,518	(47,042)
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	165	65	99
Interest cost	575	655	563
Expected return on assets	0	0	0
Amortization of prior service cost/(credit)	(639)	(468)	(468)
Amortization of actuarial (gains)/losses	325	236	268
Curtailment gain	0	0	0
Net periodic cost (benefit)	426	488	462
Current year actuarial losses/(gains)	(8,103)	64	(682)
Cumulative net loss	(325)	(236)	(268)
Amortization of prior service cost/(credit)	639	468	468
Total recognized in AOCI, before income taxes	(7,789)	296	(482)
Total recognized in net periodic cost and AOCI	$ (7,363)	$ 784	$ (20)

(Schedule of Net Funded Status)

(Schedule of Net Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in plan assets, at fair value:
Fair value of plan assets, ending balance	$ 236,781
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation, end of year		$ 339,661	$ 354,402
Change in projected benefit obligation:
Projected Benefit Obligation, Beginning Balance	355,642	308,834
Service cost	830	728	2,339
Interest cost	14,069	14,337	12,814
Plan amendments	0	0
Participant contributions	0	0
Actuarial gains/losses and changes in assumptions	(10,469)	50,115
Benefits paid	(19,252)	(18,372)
Projected Benefit Obligation, Ending Balance	340,820	355,642	308,834
Change in plan assets, at fair value:
Fair value of plan assets, beginning balance	257,355	257,510
Actual return on plan assets	(2,849)	16,663
Participant contributions	0	0
Employer contributions	1,527	1,554
Benefits paid	(19,252)	(18,372)
Fair value of plan assets, ending balance	236,781	257,355	257,510
Defined Benefit Plan, Funded Status of Plan [Abstract]
Funded Status	(104,039)	(98,287)
Amounts recognized in AOCI before income taxes:
Prior service cost (credit)	308	2,587
Net actuarial loss	103,477	99,715
Amount recognized in AOCI	103,785	102,302
Postretirement Benefits
Change in projected benefit obligation:
Projected Benefit Obligation, Beginning Balance	15,164	15,544
Service cost	165	65	99
Interest cost	575	655	563
Plan amendments	(7,657)	(1,979)
Participant contributions	1,805	1,851
Actuarial gains/losses and changes in assumptions	(446)	2,046
Benefits paid	(2,765)	(3,018)
Projected Benefit Obligation, Ending Balance	6,841	15,164	15,544
Change in plan assets, at fair value:
Fair value of plan assets, beginning balance	0	0
Actual return on plan assets	0	0
Participant contributions	1,805	1,851
Employer contributions	960	1,167
Benefits paid	(2,765)	(3,018)
Fair value of plan assets, ending balance	0	0	$ 0
Defined Benefit Plan, Funded Status of Plan [Abstract]
Funded Status	(6,841)	(15,164)
Amounts recognized in AOCI before income taxes:
Prior service cost (credit)	(12,389)	(5,370)
Net actuarial loss	4,364	5,138
Amount recognized in AOCI	$ (8,025)	$ (232)

(Schedule of Assumptions Used)

(Schedule of Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
End of year | Supplemental Executive Retirement Nonqualified Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	3.99%	3.61%	4.12%
Nonqualified pensions	3.75%	3.75%	3.75%
End of year | Medical Trend Rates, Non-Medicare Risk, Under Age 65, Percent
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Initial trend		7.00%	7.50%
Ultimate trend		5.00%	5.00%
Year ultimate trend reached		2,019	2,019
End of year | Medical Trend Rates, Non-Medicare Risk, After Age 65, Percent
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Initial trend		11.00%	11.50%
Ultimate trend		5.00%	5.00%
Year ultimate trend reached		2,027	2,027
End of year | Prescription Drugs
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Initial trend		7.00%	7.50%
Ultimate trend		5.00%	5.00%
Year ultimate trend reached		2,019	2,019
Beginning of year | Supplemental Executive Retirement Nonqualified Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	3.61%	4.12%	4.21%
Nonqualified pensions	3.75%	3.75%	3.75%
Beginning of year | Medical Trend Rates, Non-Medicare Risk, Under Age 65, Percent
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Initial trend	7.00%	7.50%	8.00%
Ultimate trend	5.00%	5.00%	5.00%
Year ultimate trend reached	2,019	2,019	2,019
Beginning of year | Medical Trend Rates, Non-Medicare Risk, After Age 65, Percent
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Initial trend	11.50%	11.50%	12.00%
Ultimate trend	5.00%	5.00%	5.00%
Year ultimate trend reached	2,027	2,027	2,027
Beginning of year | Prescription Drugs
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Initial trend	7.50%	7.50%	8.00%
Ultimate trend	5.00%	5.00%	5.00%
Year ultimate trend reached	2,019	2,019	2,019
Pension Benefits | End of year
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	4.57%	4.19%	4.99%
Expected long-term rate of return	6.00%	6.50%	6.75%
Pension Benefits | Beginning of year
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	4.19%	4.99%	4.21%
Postretirement Benefits | End of year
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	1.76%	3.50%	4.01%
Postretirement Benefits | End of year | Citizens Republic Bancorp
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	1.77%	3.61%	3.98%
Postretirement Benefits | Beginning of year
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	3.50%	4.01%	3.18%
Postretirement Life Insurance | End of year
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	4.79%	4.36%	5.08%
Postretirement Life Insurance | Beginning of year
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	4.36%	5.08%	4.30%
Expected long-term rate of return	6.50%	6.75%	7.00%

(Schedule of Amounts in Accumul

(Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year) (Details) $ in Thousands	Dec. 31, 2015USD ($)
Defined Benefit Plan Disclosure [Line Items]
Prior service cost/(credit)	$ (2,242)
Cumulative net loss	4,302
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service cost/(credit)	300
Cumulative net loss	3,321
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service cost/(credit)	(2,542)
Cumulative net loss	$ 981

Benefit Plans (Estimated Future

Benefit Plans (Estimated Future Benefit Payments) (Details) $ in Thousands	Dec. 31, 2015USD ($)
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2,016	$ 31,328
2,017	25,366
2,018	24,653
2,019	21,567
2,020	19,463
2021 through 2025	95,975
Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2,016	982
2,017	903
2,018	843
2,019	225
2,020	228
2021 through 2025	$ 1,210

Benefit Plans (Investment Alloc

Benefit Plans (Investment Allocation Strategy) (Details) - Return Seeking Investments	12 Months Ended
	Dec. 31, 2015
≤97%
Minimum	36.00%
Target	40.00%
Maximum	44.00%
98%
Minimum	34.00%
Target	38.00%
Maximum	42.00%
99%
Minimum	31.00%
Target	35.00%
Maximum	39.00%
100%
Minimum	30.00%
Target	33.00%
Maximum	36.00%
101%
Minimum	28.00%
Target	31.00%
Maximum	34.00%
102%
Minimum	26.00%
Target	29.00%
Maximum	32.00%
103%
Minimum	23.00%
Target	26.00%
Maximum	29.00%
104%
Minimum	21.00%
Target	24.00%
Maximum	27.00%
105%
Minimum	18.00%
Target	21.00%
Maximum	24.00%
106%
Minimum	16.00%
Target	18.00%
Maximum	20.00%
107%
Minimum	12.00%
Target	14.00%
Maximum	16.00%
≥108%
Minimum	8.00%
Target	10.00%
Maximum	12.00%

Benefit Plans (Schedule of Allo

Benefit Plans (Schedule of Allocation of Plan Assets) (Details)	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets on Measurement Date	100.00%	100.00%
Cash and domestic money market funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets on Measurement Date	1.95%	1.49%
U.S. Treasury obligations
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets on Measurement Date	2.40%	1.97%
U.S. Government agencies
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets on Measurement Date	1.08%	1.12%
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets on Measurement Date	2.74%	2.79%
Common stocks
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets on Measurement Date	14.30%	13.54%
Equity mutual funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets on Measurement Date	17.61%	18.85%
Fixed income mutual funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets on Measurement Date	49.62%	50.11%
Foreign mutual funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets on Measurement Date	10.30%	10.13%

Benefit Plans (Schedule of Fair

Benefit Plans (Schedule of Fair Value of Plan Assets by Measurement) (Details) $ in Thousands	Dec. 31, 2015USD ($)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 236,781
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	222,039
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14,742
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Cash and domestic money market funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,620
Cash and domestic money market funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,620
Cash and domestic money market funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Cash and domestic money market funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
U.S. Treasury obligations
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,675
U.S. Treasury obligations | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
U.S. Treasury obligations | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,675
U.S. Treasury obligations | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
U.S. Government agencies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,588
U.S. Government agencies | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
U.S. Government agencies | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,588
U.S. Government agencies | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,479
Corporate bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Corporate bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,479
Corporate bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Common stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	33,851
Common stock | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	33,851
Common stock | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Common stock | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Equity mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	41,706
Equity mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	41,706
Equity mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Equity mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fixed income mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	117,485
Fixed income mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	117,485
Fixed income mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fixed income mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Foreign mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	24,377
Foreign mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	24,377
Foreign mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Foreign mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details)	12 Months Ended
	Dec. 31, 2015USD ($)shares	Dec. 31, 2014USD ($)shares	Dec. 31, 2013USD ($)shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Authorized | shares	5,298,056
Share-based compensation expense	$ 14,200,000	$ 13,900,000	$ 10,900,000
Share-based compensation expense, tax benefit	$ 5,000,000	$ 4,900,000	$ 3,800,000
Share-based compensation, share-based award, participant age, minimum	55
Share-based compensation, share-based payment award, participant period of service	15 years
Treasury stock, shares, acquired | shares	(312,427)	(262,140)	(217,674)
Total compensation cost not yet recognized	$ 16,400,000
Total compensation cost not yet recognized, period for recognition	1 year 5 months 19 days
Restricted stock vested in period, total fair value	$ 13,500,000	$ 10,800,000	$ 9,100,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Award requisite service period	10 years
Total compensation cost not yet recognized	$ 0

Share-Based Compensation (Stock

Share-Based Compensation (Stock Option Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Balance Outstanding (shares) Beginning Balance	838	1,396	1,820
Acquired (shares)			63
Exercised (shares)	0	0	0
Forfeited (shares)	0	0	(8)
Expired (shares)	(582)	(558)	(479)
Balance Outstanding (shares) Ending Balance	256	838	1,396	1,820
Outstanding, Weighted-Average Exercise Price (dollars per share) Beginning	$ 26.64	$ 28.84	$ 24.73
Acquired, Weighted-Average Exercise Price (dollars per share)			218.01
Exercised, Weighted-Average Exercise Price (dollars per share)	0	0	0
Forfeited, Weighted-Average Exercise Price (dollars per share)	0	0	23.93
Expired, Weighted-Average Exercise Price (dollars per share)	28.25	31.91	36.64
Outstanding, Weighted-Average Exercise Price (dollars per share) Ending	$ 23	$ 26.64	$ 28.84	$ 24.73
Exercisable (shares)	256
Exercisable, Weighted-Average Exercise Price (dollars per share)	$ 23
Outstanding, Weighted-Average Remaining Contractual Term	6 months 7 days	7 months 13 days	1 year 1 month 21 days	1 year 9 months 26 days
Outstanding, Aggregate Intrinsic Value	$ 0	$ 0	$ 87	$ 0

Share-Based Compensation (Restr

Share-Based Compensation (Restricted Stock Activity) (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Nonvested Balance Outstanding (shares) Beginning Balance	1,413	1,342	1,079
Granted (shares)	792	777	823
Vested (shares)	(711)	(664)	(508)
Forfeited or expired (shares)	(88)	(42)	(52)
Nonvested Balance Outstanding (shares) Ending Balance	1,406	1,413	1,342
Nonvested, Outstanding, Weighted-Average Grant Date Fair Value (dollars per share) Beginning	$ 18.16	$ 16.34	$ 17
Granted, Weighted-Average Grant Date Fair Value (dollars per share)	19.48	19.67	16.47
Vested, Weighted-Average Grant Date Fair Value (dollars per share)	18.95	16.30	17.90
Forfeited or expired, Weighted-Average Grant Date Fair Value (dollars per share)	18.99	18.16	16.89
Nonvested, Outstanding, Weighted-Average Grant Date Fair Value (dollars per share) Ending	$ 19.10	$ 18.16	$ 16.34

Parent Company (Schedule of Con

Parent Company (Schedule of Condensed Financial Statements-Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets:
Cash and due from banks	$ 380,799	$ 480,998
Other assets	1,218,071	1,216,748
Total assets	25,524,604	24,902,347
Liabilities and Shareholders' Equity:
Long-term debt	505,173	505,192
Shareholders' equity	2,940,095	2,834,281	$ 2,702,894	$ 1,645,202
Total liabilities and shareholders’ equity	25,524,604	24,902,347
Parent
Assets:
Cash and due from banks	99,638	142,950
Investment securities	1,553	1,553
Investment in subsidiaries, at equity in underlying value of their net assets	3,087,651	2,936,865
Other assets	16,565	20,479
Total assets	3,205,407	3,101,847
Liabilities and Shareholders' Equity:
Long-term debt	248,443	249,935
Accrued and other liabilities	16,869	17,631
Shareholders' equity	2,940,095	2,834,281
Total liabilities and shareholders’ equity	$ 3,205,407	$ 3,101,847

Parent Company (Schedule of 117

Parent Company (Schedule of Condensed Financial Statements-Income Statement ) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Income before income tax expense	$ 326,503	$ 339,894	$ 263,191
Income tax expense	97,019	101,943	79,507
Net income	229,484	237,951	183,684
Parent
Condensed Financial Statements, Captions [Line Items]
Cash dividends from subsidiaries	103,500	82,642	81,715
Other income	480	437	483
Total Income	103,980	83,079	82,198
Interest and other expenses	27,096	30,613	29,684
Income before income tax expense	76,884	52,466	52,514
Income tax expense	(9,451)	(10,324)	(9,341)
Income before undistributed income of subsidiaries	86,335	62,790	61,855
Equity in undistributed income of subsidiaries	143,149	175,161	121,829
Net income	$ 229,484	$ 237,951	$ 183,684

Parent Company (Schedule of 118

Parent Company (Schedule of Condensed Financial Statements-Cash Flows) (Details) - USD ($) $ in Thousands	May. 13, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities:
Net income		$ 229,484	$ 237,951	$ 183,684
Adjustments to reconcile net income to net cash provided by operating activities
NET CASH PROVIDED BY OPERATING ACTIVITIES		313,700	284,637	309,366
Investing activities:
NET CASH PROVIDED (USED) BY INVESTING ACTIVITIES		(936,398)	(1,189,920)	641,219
Financing activities:
Proceeds from issuance of preferred stock		0	0	96,550
Cash dividends - common		(108,887)	(105,333)	(96,222)
Cash dividends - preferred		(5,876)	(5,876)	(5,337)
Purchase of treasury shares		(4,395)	(4,261)	(9,521)
Repurchase of common stock warrant	$ (12,200)	(12,150)	0	0
NET CASH PROVIDED (USED) BY FINANCING ACTIVITIES		389,091	684,885	(290,777)
(Decrease) increase in cash and cash equivalents		(233,607)	(220,398)	659,808
Cash and cash equivalents at beginning of year		697,424	917,822	258,014
Cash and cash equivalents at end of year		463,817	697,424	917,822
Parent
Operating activities:
Net income		229,484	237,951	183,684
Adjustments to reconcile net income to net cash provided by operating activities
Equity in undistributed income of subsidiaries		(143,149)	(175,161)	(121,829)
Decrease (increase) in Federal income tax receivable		4,863	35,672	(30,399)
Decrease (increase) in deferred Federal tax asset		1,776	(1,449)	27,032
Increase in interest payable		0	0	4,618
Other		(4,978)	(552)	924
NET CASH PROVIDED BY OPERATING ACTIVITIES		87,996	96,461	64,030
Investing activities:
Loans to subsidiaries		0	0	(50)
Repayment of loans to or investment in subsidiaries		0	110,675	0
Cash paid for acquisition, net of cash received		0	0	(315,069)
Sale of investment securities		0	784	0
Purchases of investment securities		0	(81)	(215)
NET CASH PROVIDED (USED) BY INVESTING ACTIVITIES		0	111,378	(315,334)
Financing activities:
Proceeds from issuance of subordinated debt		0	0	249,927
Proceeds from issuance of preferred stock		0	0	96,550
Repayment of long-term debt		0	(74,451)	0
Cash dividends - common		(108,887)	(105,333)	(96,222)
Cash dividends - preferred		(5,876)	(5,876)	(5,337)
Purchase of treasury shares		(4,395)	(4,261)	(9,521)
Repurchase of common stock warrant		(12,150)	0	0
NET CASH PROVIDED (USED) BY FINANCING ACTIVITIES		(131,308)	(189,921)	235,397
(Decrease) increase in cash and cash equivalents		(43,312)	17,918	(15,907)
Cash and cash equivalents at beginning of year		142,950	125,032	140,939
Cash and cash equivalents at end of year		$ 99,638	$ 142,950	$ 125,032

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
OPERATIONS:
Net interest income	$ 741,295	$ 775,568	$ 710,785
Provision for loan losses	45,100	52,279	33,684
Other income	268,998	281,524	270,343
Other expenses	638,690	664,919	684,253
Net income	229,484	237,951	183,684
AVERAGES :
Assets	25,155,792	24,418,211	21,489,775
Loans	15,673,200	14,891,315	12,948,666
Earnings assets	22,439,516	21,502,747	18,492,995
Deposits	19,858,850	19,528,435	17,301,588
Economic Capital	2,903,160	2,790,139	2,408,865
Commercial Loan
OPERATIONS:
Net interest income	406,520	417,788	408,006
Provision for loan losses	16,373	2,898	17,072
Other income	88,384	91,483	83,933
Other expenses	240,634	247,258	209,936
Net income	154,632	171,560	172,206
AVERAGES :
Assets	9,464,876	9,265,088	8,397,357
Loans	9,550,421	9,262,224	8,292,805
Earnings assets	9,868,378	9,549,341	8,480,005
Deposits	7,071,238	6,679,007	5,572,287
Economic Capital	1,309,589	1,318,357	602,561
Retail
OPERATIONS:
Net interest income	370,781	383,151	349,433
Provision for loan losses	28,152	39,618	16,151
Other income	96,979	106,716	114,679
Other expenses	345,827	359,848	330,875
Net income	60,957	58,760	76,105
AVERAGES :
Assets	6,022,529	5,641,517	4,746,277
Loans	5,775,543	5,305,071	4,367,701
Earnings assets	5,783,272	5,328,107	4,392,937
Deposits	11,035,639	11,484,763	10,749,725
Economic Capital	807,150	741,165	256,362
Wealth
OPERATIONS:
Net interest income	22,403	20,330	17,192
Provision for loan losses	94	1,895	(692)
Other income	57,995	55,800	48,289
Other expenses	54,681	54,204	54,196
Net income	16,654	13,021	7,784
AVERAGES :
Assets	298,435	271,975	259,601
Loans	289,044	261,321	226,152
Earnings assets	289,044	261,321	226,179
Deposits	1,215,174	1,089,068	826,794
Economic Capital	115,447	100,327	72,244
Other
OPERATIONS:
Net interest income	(58,409)	(45,701)	(63,846)
Provision for loan losses	481	7,868	1,153
Other income	25,640	27,525	23,442
Other expenses	(2,452)	3,609	89,246
Net income	(2,759)	(5,390)	(72,411)
AVERAGES :
Assets	9,369,952	9,239,631	8,086,540
Loans	58,192	62,699	62,008
Earnings assets	6,498,822	6,363,978	5,393,874
Deposits	536,799	275,597	152,782
Economic Capital	$ 670,974	$ 630,290	$ 1,477,698

Fair Value Measurement (Narrati

Fair Value Measurement (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2012USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage Servicing Rights	$ 18,937	$ 22,011	$ 22,760	$ 21,316
Mortgage Servicing rights Valuation Allowance	(399)	(955)	(282)	$ (2,564)
MSRs, net carrying balance	18,538	21,056	22,478
Mortgage Servicing Rights (MSR) Impairment (Recovery)	(556)	673	$ (2,282)
Impaired Collateral Dependant Loans, Recorded Investment	84,300	60,300
Determination Of Specific Allowance For Loan Losses	(12,900)	(4,300)
Collateral Dependant Impaired and Non Accrual Loans Carrying Amount	71,400	56,000
Impairment of Other Real Estate Owned	4,500	2,600
Impairment of Covered Other Real Esate Owned	$ 600	$ 1,200
Percent of available for sale securities classified as level 2	91.00%
Percentage of Level 3 investments in available for sale investment portfolio	9.00%
True up liability, discount period	10 years
True-up Liabitlity Discount Rate	3.77%	3.36%
True-up Liability Effect of Change in Discount Rate Increase By One Percent	$ 600	$ (700)
Number of loans that were 90 days or more past due, or were any on nonaccrual status	0
Time period for non-payment of loans that are placed on non-accrual status	90 days
Midwest
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
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
Percent of cumulative shared loss payments under loss sharing agreements	25.00%
Estimated fair value of true up liability	$ 9,300	8,500
George Washington
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percent of cumulative shared loss payments under loss sharing agreements	25.00%
Estimated fair value of true up liability	$ 5,500	$ 4,800
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

Fair Value Measurement (Recurri

Fair Value Measurement (Recurring and Nonrecurring Table) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Recurring Fair Value Measurements
Available-for-sale	$ 3,967,735	$ 3,545,288
Accumulated Gross Unrealized Loss	57,027	52,631
Loans held for sale, Fair Value	5,472	13,428
Derivative Asset, Fair Value, Gross Asset	58,107	55,197
Total Assets, Fair Value Disclosure, Recurring	4,031,314	3,613,913
Derivative Liability, Fair Value, Gross Liability	52,745	55,439
True Up Liability	14,750	13,294
Total liabilities at fair value on a recurring basis	67,495	68,733
Nonrecurring Fair Value Measurements [Abstract]
Fair Value of Mortgage Servicing Rights	19,149	21,228	$ 23,041
Impaired and Non Accrual Loans Fair Value Disclosure	71,428	56,041
Other Real Estate, Non Covered	18,576	12,510
Other Real Estate Covered by Loss Share	365	3,614
Nonrecurring Fair Value	109,518	93,393
Mortgage Servicing Rights	18,937	22,011	22,760	$ 21,316
Mortgage Servicing rights Valuation Allowance	(399)	(955)	(282)	$ (2,564)
MSRs, net carrying balance	18,538	21,056	22,478
Mortgage Servicing Rights (MSR) Impairment (Recovery)	(556)	673	$ (2,282)
Impaired Collateral Dependant Loans, Recorded Investment	84,300	60,300
Determination Of Specific Allowance For Loan Losses	(12,900)	(4,300)
Collateral Dependant Impaired and Non Accrual Loans Carrying Amount	71,400	56,000
Impairment of Other Real Estate Owned	4,500	2,600
Impairment of Covered Other Real Esate Owned	600	1,200
Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	49,368	49,941
Derivative Liability, Fair Value, Gross Liability	49,209	48,756
Interest Rate Swap | Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	8,739	5,256
Derivative Liability, Fair Value, Gross Liability	3,536	6,683
Interest Rate Swap | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	48,920	48,366
Derivative Liability, Fair Value, Gross Liability	48,920	48,366
Mortgage Loan Commitments | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	149	1,408
Derivative Liability, Fair Value, Gross Liability	0	0
Forward Contracts | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	5	272
Foreign Exchange | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	299	167
Derivative Liability, Fair Value, Gross Liability	284	118
Marketable equity securities
Recurring Fair Value Measurements
Available-for-sale	2,821	2,974
Accumulated Gross Unrealized Loss	0	0
Total equity securities
Recurring Fair Value Measurements
Available-for-sale	2,821	2,974
Accumulated Gross Unrealized Loss	0
U.S. Treasury obligations
Recurring Fair Value Measurements
Available-for-sale	5,000
Accumulated Gross Unrealized Loss	1
U.S. Government agencies
Recurring Fair Value Measurements
Available-for-sale	2,498	2,482
Accumulated Gross Unrealized Loss	2	18
U.S. States and political subdivisions
Recurring Fair Value Measurements
Available-for-sale	192,795	227,342
Accumulated Gross Unrealized Loss	204	466
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	906,229	970,998
Accumulated Gross Unrealized Loss	5,454	3,218
Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	172,109	103,403
Accumulated Gross Unrealized Loss	2,023	1,371
Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	2,128,320	1,676,567
Accumulated Gross Unrealized Loss	30,147	26,225
Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency
Recurring Fair Value Measurements
Available-for-sale	4	7
Accumulated Gross Unrealized Loss	0	0
Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	216,319	222,334
Accumulated Gross Unrealized Loss	1,269	1,405
Corporate bonds
Recurring Fair Value Measurements
Available-for-sale	52,229	51,337
Accumulated Gross Unrealized Loss	9,481	10,315
Collateralized Loan Obligations
Recurring Fair Value Measurements
Available-for-sale	289,411	287,844
Accumulated Gross Unrealized Loss	8,446	9,613
Level 1
Recurring Fair Value Measurements
Available-for-sale	2,821	2,974
Loans held for sale, Fair Value	0	0
Derivative Asset, Fair Value, Gross Asset	0	0
Total Assets, Fair Value Disclosure, Recurring	2,821	2,974
Derivative Liability, Fair Value, Gross Liability	0	0
True Up Liability	0	0
Total liabilities at fair value on a recurring basis	0	0
Nonrecurring Fair Value Measurements [Abstract]
Fair Value of Mortgage Servicing Rights	0	0
Impaired and Non Accrual Loans Fair Value Disclosure	0	0
Other Real Estate, Non Covered	0	0
Other Real Estate Covered by Loss Share	0	0
Nonrecurring Fair Value	0	0
Level 1 | Interest Rate Swap | Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Level 1 | Interest Rate Swap | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Level 1 | Mortgage Loan Commitments | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	0	0
Level 1 | Forward Contracts | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Liability, Fair Value, Gross Liability	0	0
Level 1 | Foreign Exchange | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Level 1 | Marketable equity securities
Recurring Fair Value Measurements
Available-for-sale	2,821
Level 1 | Total equity securities
Recurring Fair Value Measurements
Available-for-sale		2,974
Level 1 | U.S. Government agencies
Recurring Fair Value Measurements
Available-for-sale	0
Level 1 | U.S. States and political subdivisions
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 1 | Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 1 | Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 1 | Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 1 | Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 1 | Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 1 | Corporate bonds
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 1 | Collateralized Loan Obligations
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 2
Recurring Fair Value Measurements
Available-for-sale	3,623,270	3,203,127
Loans held for sale, Fair Value	5,472	13,428
Derivative Asset, Fair Value, Gross Asset	58,107	55,197
Total Assets, Fair Value Disclosure, Recurring	3,686,849	3,271,752
Derivative Liability, Fair Value, Gross Liability	52,745	55,439
True Up Liability	0	0
Total liabilities at fair value on a recurring basis	52,745	55,439
Nonrecurring Fair Value Measurements [Abstract]
Fair Value of Mortgage Servicing Rights	0	0
Impaired and Non Accrual Loans Fair Value Disclosure	0	0
Other Real Estate, Non Covered	0	0
Other Real Estate Covered by Loss Share	0	0
Nonrecurring Fair Value	0	0
Level 2 | Interest Rate Swap | Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	8,739	5,256
Derivative Liability, Fair Value, Gross Liability	3,536	6,683
Level 2 | Interest Rate Swap | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	48,920	48,366
Derivative Liability, Fair Value, Gross Liability	48,920	48,366
Level 2 | Mortgage Loan Commitments | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	149	1,408
Level 2 | Forward Contracts | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Liability, Fair Value, Gross Liability	5	272
Level 2 | Foreign Exchange | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	299	167
Derivative Liability, Fair Value, Gross Liability	284	118
Level 2 | Marketable equity securities
Recurring Fair Value Measurements
Available-for-sale	0
Level 2 | Total equity securities
Recurring Fair Value Measurements
Available-for-sale		0
Level 2 | U.S. Treasury obligations
Recurring Fair Value Measurements
Available-for-sale	5,000
Level 2 | U.S. Government agencies
Recurring Fair Value Measurements
Available-for-sale	2,498	2,482
Level 2 | U.S. States and political subdivisions
Recurring Fair Value Measurements
Available-for-sale	192,795	227,342
Level 2 | Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	906,229	970,998
Level 2 | Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	172,109	103,403
Level 2 | Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	2,128,320	1,676,567
Level 2 | Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency
Recurring Fair Value Measurements
Available-for-sale	0	1
Level 2 | Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	216,319	222,334
Level 2 | Corporate bonds
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 2 | Collateralized Loan Obligations
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 3
Recurring Fair Value Measurements
Available-for-sale	341,644	339,187
Loans held for sale, Fair Value	0	0
Derivative Asset, Fair Value, Gross Asset	0	0
Total Assets, Fair Value Disclosure, Recurring	341,644	339,187
Derivative Liability, Fair Value, Gross Liability	0	0
True Up Liability	14,750	13,294
Total liabilities at fair value on a recurring basis	14,750	13,294
Nonrecurring Fair Value Measurements [Abstract]
Fair Value of Mortgage Servicing Rights	19,149	21,228
Impaired and Non Accrual Loans Fair Value Disclosure	71,428	56,041
Other Real Estate, Non Covered	18,576	12,510
Other Real Estate Covered by Loss Share	365	3,614
Nonrecurring Fair Value	109,518	93,393
Level 3 | Interest Rate Swap | Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Level 3 | Interest Rate Swap | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Level 3 | Mortgage Loan Commitments | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	0	0
Level 3 | Forward Contracts | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Liability, Fair Value, Gross Liability	0	0
Level 3 | Foreign Exchange | Not Designated as Hedging Instrument
Recurring Fair Value Measurements
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Level 3 | Marketable equity securities
Recurring Fair Value Measurements
Available-for-sale	0
Level 3 | Total equity securities
Recurring Fair Value Measurements
Available-for-sale		0
Level 3 | U.S. Government agencies
Recurring Fair Value Measurements
Available-for-sale	0
Level 3 | U.S. States and political subdivisions
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 3 | Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 3 | Commercial Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 3 | Residential Collateralized Mortgage-Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 3 | Residential Collateralized Mortgage-Backed Securities Issued by Non-US Government Agency
Recurring Fair Value Measurements
Available-for-sale	4	6
Level 3 | Commercial Collateralized Mortgage Backed Securities Issued by US Government Sponsored Enterprises
Recurring Fair Value Measurements
Available-for-sale	0	0
Level 3 | Corporate bonds
Recurring Fair Value Measurements
Available-for-sale		51,337
Level 3 | Collateralized Loan Obligations
Recurring Fair Value Measurements
Available-for-sale	$ 289,411	$ 287,844

Fair Value Measurement (Fair Va

Fair Value Measurement (Fair Value, Assets Measured on a Recurring Basis, Unobservable Inputs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Available-for-sale securities, Beginning balance	$ 339,187	$ 347,611
True-up liability, Beginning balance	13,294	11,463
Fair value of assets acquired	0	0
Available-for-sale securities, (Gains) losses included in earnings	0	0
True-up liability, (Gains) loses included in earnings	1,456	1,831
Available-for-sale securities, Unrealized gains (losses)	2,653	(6,030)
True-up liability, , Unrealized gains (losses)	0	0
Available-for-sale securities, Purchases	79,446	0
True-up liability, Purchases	0	0
Available-for-sale securities, Sales	(71,832)	0
True-up liability, Available-for-sale securities	0	0
Available-for-sale securities, Settlements	(7,810)	(2,394)
True-up liability, Settlements	0	0
Available-for-sale securities, Ending balance	341,644	339,187
True-up liability, Ending balance	$ 14,750	$ 13,294

Fair Value Measurement (Changes

Fair Value Measurement (Changes in Fair Value Carrying Amount of Residential Mortgages) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]
Loans held for sale, Fair Value	$ 5,472	$ 13,428
Aggregate Fair Value
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]
Loans held for sale, Fair Value		13,428
Contractual Balance
Fair Value of Assets Loans Receivable Aggregate Unpaid Principal [Line Items]
Loans held for sale, Fair Value	5,320	12,912
Carrying amount over aggregate unpaid principal	$ 152	$ 516

Fair Value Measurement (Fair124

Fair Value Measurement (Fair Value, by Balance Sheet Grouping) (Details) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 463,817	$ 697,424	$ 917,822	$ 258,014
Cash and Cash Equivalents, Fair Value Disclosure	463,817	697,424
Available-for-sale	3,967,735	3,545,288
Held-to-maturity	2,674,093	2,903,609
Held-to-maturity Securities, Fair Value	2,659,119	2,875,920
Other Investments and Securities, at Cost	148,172	148,654
Other Investments, Fair Value	148,172	148,654
Loans held for sale, Carrying Amount		13,428
Loans held for sale, Fair Value	5,472	13,428
Net originated and acquired loans, Carrying Amount	15,923,254	15,182,498
Covered Loans and Leases Receivable Fair Value Disclosure	170,690	312,659
Accrued interest receivable, Carrying Amount	67,887	63,657
Accrued Interest Receivable, Fair Value	67,887	63,657
Derivatives, Carrying Amount	58,107	55,197
Derivative Asset, Fair Value, Gross Asset	58,107	55,197
Deposits, Carrying Amount	20,108,003	19,504,665
Deposits, Fair Value	20,116,298	19,510,192
Federal funds purchased and securities sold under agreements to repurchase, Carrying Amount	1,037,075	1,272,591
Federal funds purchased and securities sold under agreements to repurchase, Fair Value	1,037,075	1,272,591
Wholesale borrowings, Carrying Amount	580,648	428,071
Wholesale borrowings, Fair Value	582,120	430,676
Long-term debt, Carrying Amount	505,173	505,192
Long-term Debt, Fair Value	503,675	516,476
Accrued Interest payable, Carrying Amount	10,758	9,820
Accrued interest payable, Fair Value	10,758	9,820
Derivatives, Carrying Amount	52,745	55,439
Derivatives, Fair Value	52,745	55,439
Originated Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net originated and acquired loans, Carrying Amount	14,013,370	12,398,116
Net originated and acquired loans, Fair Value	13,795,058	12,235,530
Acquired Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net originated and acquired loans, Carrying Amount	1,739,194	2,471,723
Net originated and acquired loans, Fair Value	1,796,314	2,564,842
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure		697,424
Available-for-sale	2,821	2,974
Held-to-maturity Securities, Fair Value	0	0
Other Investments, Fair Value	0	0
Loans held for sale, Fair Value	0	0
Covered Loans and Leases Receivable Fair Value Disclosure	0	0
Accrued Interest Receivable, Fair Value	0	0
Derivative Asset, Fair Value, Gross Asset	0	0
Deposits, Fair Value	0	0
Federal funds purchased and securities sold under agreements to repurchase, Fair Value	0	0
Wholesale borrowings, Fair Value	0	0
Long-term Debt, Fair Value	0	0
Accrued interest payable, Fair Value	0	0
Derivatives, Fair Value	0	0
Level 1 | Originated Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net originated and acquired loans, Fair Value	0	0
Level 1 | Acquired Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net originated and acquired loans, Fair Value	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Available-for-sale	3,623,270	3,203,127
Held-to-maturity Securities, Fair Value		2,875,920
Other Investments, Fair Value		148,654
Loans held for sale, Fair Value	5,472	13,428
Covered Loans and Leases Receivable Fair Value Disclosure	0	0
Accrued Interest Receivable, Fair Value	67,887	63,657
Derivative Asset, Fair Value, Gross Asset	58,107	55,197
Deposits, Fair Value	20,116,298	19,510,192
Federal funds purchased and securities sold under agreements to repurchase, Fair Value		1,272,591
Wholesale borrowings, Fair Value	582,120	430,676
Long-term Debt, Fair Value	503,675	516,476
Accrued interest payable, Fair Value	10,758	9,820
Derivatives, Fair Value	52,745	55,439
Level 2 | Originated Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net originated and acquired loans, Fair Value	0	0
Level 2 | Acquired Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net originated and acquired loans, Fair Value	0	0
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Available-for-sale	341,644	339,187
Held-to-maturity Securities, Fair Value	0	0
Other Investments, Fair Value	0	0
Loans held for sale, Fair Value	0	0
Accrued Interest Receivable, Fair Value	0	0
Derivative Asset, Fair Value, Gross Asset	0	0
Deposits, Fair Value	0	0
Federal funds purchased and securities sold under agreements to repurchase, Fair Value	0	0
Wholesale borrowings, Fair Value	0	0
Long-term Debt, Fair Value	0	0
Accrued interest payable, Fair Value	0	0
Derivatives, Fair Value	0	0
Level 3 | Originated Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net originated and acquired loans, Fair Value	13,795,058	12,235,530
Level 3 | Acquired Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net originated and acquired loans, Fair Value	$ 1,796,314	$ 2,564,842

Derivatives and Hedging Acti125

Derivatives and Hedging Activity (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Term of written loan commitments, days	60 days
Default Assumptions Percentage	100.00%
Credit Derivative, Maximum Exposure, Undiscounted	$ 4,700
Government Agency Issued Bonds or MBS
Derivative [Line Items]
Fair value of investment securities posted as collateral against derivative liabilities	47,200	$ 53,500
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative Asset, Notional/Contract Amount	$ 250,000	$ 250,000

Derivatives and Hedging Acti126

Derivatives and Hedging Activity (Derivative Instruments Designated as Hedging Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Derivatives designated in hedge relationships
Derivative Asset, Fair Value	$ 58,107	$ 55,197
Derivative Liability, Fair Value, Gross Liability	52,745	55,439
Designated as Hedging Instrument | Commercial Loan Swaps (FRAPS)
Derivatives designated in hedge relationships
Derivative Asset, Notional/Contract Amount	0	0
Derivative Asset, Fair Value	0	0
Derivative Liability, Notional/Contract Amount	55,689	93,313
Derivative Liability, Fair Value, Gross Liability	3,536	6,683
Designated as Hedging Instrument | Sub Debt Swap
Derivatives designated in hedge relationships
Derivative Asset, Notional/Contract Amount	250,000	250,000
Derivative Asset, Fair Value	8,739	5,256
Derivative Liability, Notional/Contract Amount	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Designated as Hedging Instrument | Fair value hedges
Derivatives designated in hedge relationships
Derivative Asset, Notional/Contract Amount	250,000	250,000
Derivative Asset, Fair Value	8,739	5,256
Derivative Liability, Notional/Contract Amount	55,689	93,313
Derivative Liability, Fair Value, Gross Liability	$ 3,536	$ 6,683

Derivatives and Hedging Acti127

Derivatives and Hedging Activity (Derivative Instruments not Designated as Hedging Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Derivatives not designated in hedge relationships
Derivative Asset, Fair Value	$ 58,107	$ 55,197
Derivative Liability, Fair Value, Gross Liability	52,745	55,439
Not Designated as Hedging Instrument
Derivatives not designated in hedge relationships
Derivative Asset, Notional/Contract Amount	1,858,882	1,807,942
Derivative Asset, Fair Value	49,368	49,941
Derivative Liability, Notional/Contract Amount	1,956,287	1,821,674
Derivative Liability, Fair Value, Gross Liability	49,209	48,756
Not Designated as Hedging Instrument | Interest Rate Swap
Derivatives not designated in hedge relationships
Derivative Asset, Notional/Contract Amount	1,824,576	1,673,012
Derivative Asset, Fair Value	48,920	48,366
Derivative Liability, Notional/Contract Amount	1,824,576	1,673,012
Derivative Liability, Fair Value, Gross Liability	48,920	48,366
Not Designated as Hedging Instrument | Mortgage Loan Commitments
Derivatives not designated in hedge relationships
Derivative Asset, Notional/Contract Amount	20,635	102,523
Derivative Asset, Fair Value	149	1,408
Derivative Liability, Notional/Contract Amount	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument | Forward 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	9,659	47,657
Derivative Liability, Fair Value, Gross Liability	5	272
Not Designated as Hedging Instrument | Credit contracts
Derivatives not designated in hedge relationships
Derivative Asset, Notional/Contract Amount	0	10,001
Derivative Asset, Fair Value	0	0
Derivative Liability, Notional/Contract Amount	73,715	69,227
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument | Foreign Exchange
Derivatives not designated in hedge relationships
Derivative Asset, Notional/Contract Amount	13,671	22,406
Derivative Asset, Fair Value	299	167
Derivative Liability, Notional/Contract Amount	11,706	6,580
Derivative Liability, Fair Value, Gross Liability	284	118
Not Designated as Hedging Instrument | Equity swap
Derivatives not designated in hedge relationships
Derivative Asset, Notional/Contract Amount	0	0
Derivative Asset, Fair Value	0	0
Derivative Liability, Notional/Contract Amount	36,631	25,198
Derivative Liability, Fair Value, Gross Liability	$ 0	$ 0

Derivatives and Hedging Acti128

Derivatives and Hedging Activity (Derivative Instruments, Gain (Loss)) (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Gains and losses recognized in income on non-designated hedging instruments
Amount of Gain / (Loss) Recognized in Income on Derivatives	$ (3,147)	$ (864)	$ (3,296)
Mortgage Loan Commitments | Other income
Gains and losses recognized in income on non-designated hedging instruments
Amount of Gain / (Loss) Recognized in Income on Derivatives	(1,260)	517	(3,509)
Forward Contracts | Other income
Gains and losses recognized in income on non-designated hedging instruments
Amount of Gain / (Loss) Recognized in Income on Derivatives	267	(656)	446
Credit contracts | Other income
Gains and losses recognized in income on non-designated hedging instruments
Amount of Gain / (Loss) Recognized in Income on Derivatives	(2,154)	(210)	(233)
Other | Other Expenses
Gains and losses recognized in income on non-designated hedging instruments
Amount of Gain / (Loss) Recognized in Income on Derivatives	$ 0	$ (515)	$ 0

Derivatives and Hedging Acti129

Derivatives and Hedging Activity (Offsetting Disclosure for Derivative Contracts) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Derivative Asset [Abstract]
Gross amounts recognized	$ 8,894	$ 5,742
Gross amounts offset in the consolidated balance sheet	0	0
Net amounts presented in the consolidated balance sheet	8,894	5,742
Gross amounts not offset in the consolidated balance sheet, Financial Instruments	(155)	(380)
Gross amounts not offset in the consolidated balance sheet, Collateral	0	(106)
Net Amount, net amount total, derivative asset, fair value	8,739	5,256
Derivative Liability [Abstract]
Gross amounts recognized	52,301	54,725
Gross amounts offset in the consolidated balance sheet	0	0
Net amounts presented in the consolidated balance sheet	52,301	54,725
Gross amounts not offset in the consolidated balance sheet, Financial Instruments	(155)	(380)
Gross amounts not offset in the consolidated balance sheet, Collateral	(52,146)	(54,345)
Net Amount, net amount total, derivative liability, fair value	0	0
Designated as Hedging Instrument | Interest Rate Swap
Derivative Asset [Abstract]
Gross amounts recognized	8,739	5,256
Gross amounts offset in the consolidated balance sheet	0	0
Net amounts presented in the consolidated balance sheet	8,739	5,256
Gross amounts not offset in the consolidated balance sheet, Financial Instruments	0	0
Gross amounts not offset in the consolidated balance sheet, Collateral	0	0
Net Amount, net amount total, derivative asset, fair value	8,739	5,256
Derivative Liability [Abstract]
Gross amounts recognized	3,536	6,683
Gross amounts offset in the consolidated balance sheet	0	0
Net amounts presented in the consolidated balance sheet	3,536	6,683
Gross amounts not offset in the consolidated balance sheet, Financial Instruments	0	0
Gross amounts not offset in the consolidated balance sheet, Collateral	(3,536)	(6,683)
Net Amount, net amount total, derivative liability, fair value	0	0
Not Designated as Hedging Instrument | Interest Rate Swap
Derivative Asset [Abstract]
Gross amounts recognized	155	352
Gross amounts offset in the consolidated balance sheet	0	0
Net amounts presented in the consolidated balance sheet	155	352
Gross amounts not offset in the consolidated balance sheet, Financial Instruments	(155)	(352)
Gross amounts not offset in the consolidated balance sheet, Collateral	0	0
Net Amount, net amount total, derivative asset, fair value	0	0
Derivative Liability [Abstract]
Gross amounts recognized	48,765	48,014
Gross amounts offset in the consolidated balance sheet	0	0
Net amounts presented in the consolidated balance sheet	48,765	48,014
Gross amounts not offset in the consolidated balance sheet, Financial Instruments	(155)	(352)
Gross amounts not offset in the consolidated balance sheet, Collateral	(48,610)	(47,662)
Net Amount, net amount total, derivative liability, fair value	0	0
Not Designated as Hedging Instrument | Foreign Exchange
Derivative Asset [Abstract]
Gross amounts recognized	0	134
Gross amounts offset in the consolidated balance sheet	0	0
Net amounts presented in the consolidated balance sheet	0	134
Gross amounts not offset in the consolidated balance sheet, Financial Instruments	0	(28)
Gross amounts not offset in the consolidated balance sheet, Collateral	0	(106)
Net Amount, net amount total, derivative asset, fair value	0	0
Derivative Liability [Abstract]
Gross amounts recognized	0	28
Gross amounts offset in the consolidated balance sheet	0	0
Net amounts presented in the consolidated balance sheet	0	28
Gross amounts not offset in the consolidated balance sheet, Financial Instruments	0	(28)
Gross amounts not offset in the consolidated balance sheet, Collateral	0	0
Net Amount, net amount total, derivative liability, fair value	$ 0	$ 0

Commitments and Contingencie130

Commitments and Contingencies (Narratives) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Loss Contingencies [Line Items]
Allowance for unfunded lending commitments	$ 4,100	$ 5,800
Short-term guarantees	131,700
Repurchase Reserve	2,725	8,374	$ 9,851
Reserve on residential mortgage loans
Loss Contingencies [Line Items]
Financing Receivable, Loans Sold to Third Party Investors	10,100	38,100
Repurchase Reserve	2,725	7,250	8,737
Reserve on manufactured housing loans
Loss Contingencies [Line Items]
Financing Receivable, Loans Sold to Third Party Investors		3,700
Repurchase Reserve	$ 0	$ 1,124	$ 1,114

Commitments and Contingencie131

Commitments and Contingencies (Schedule of Future Minimum Rental Payments for Operating Leases) (Details) $ in Thousands	Dec. 31, 2015USD ($)
Operating Leases, Future Minimum Payments Due [Abstract]
2,016	$ 11,942
2,017	11,288
2,018	9,842
2,019	7,870
2,020	6,605
2021-2034	18,521
Total minimum future rental payments	$ 66,068

Commitments and Contingencie132

Commitments and Contingencies (Schedule of Commitments to Extend Credit) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan commitments	$ 6,385,147	$ 6,136,313
Commercial Loan
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan commitments	3,992,089	3,748,690
Consumer Loan
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan commitments	$ 2,393,058	$ 2,387,623

Commitments and Contingencie133

Commitments and Contingencies (Schedule of Guarantor Obligations) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Guarantor Obligations [Line Items]
Total financial guarantees	$ 267,605	$ 287,461
Standby letters of credit
Guarantor Obligations [Line Items]
Total financial guarantees	254,703	242,390
Loans sold with recourse
Guarantor Obligations [Line Items]
Total financial guarantees	$ 12,902	$ 45,071

Commitments and Contingencie134

Commitments and Contingencies (Changes in Repurchase Reserve) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 8,374	$ 9,851
Net realized gains/(losses)	(4,768)	(4,554)
Net increase/(decrease) to reserve	(881)	3,077
Balance at end of period	2,725	8,374
Reserve on residential mortgage loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	7,250	8,737
Net realized gains/(losses)	(3,638)	(4,564)
Net increase/(decrease) to reserve	(887)	3,077
Balance at end of period	2,725	7,250
Reserve on manufactured housing loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	1,124	1,114
Net realized gains/(losses)	(1,130)	10
Net increase/(decrease) to reserve	6	0
Balance at end of period	$ 0	$ 1,124

Commitments and Contingencie135

Commitments and Contingencies (Litigation) (Details) - Pending Litigation - lawsuit	Feb. 17, 2016	Feb. 11, 2016	Dec. 31, 2010
Overdraft Litigation
Loss Contingencies [Line Items]
Number of pending claims			2
Subsequent Event | Merger Litigation
Loss Contingencies [Line Items]
Number of pending claims	2	2

Shareholders' Equity (Narrative

Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	May. 13, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Feb. 04, 2013
Business Acquisition [Line Items]
Payments for repurchase of warrants	$ 12,200	$ 12,150	$ 0	$ 0
Reduction in capital surplus		$ (9,200)
Preferred stock shares authorized		7,000,000
Non-cumulative perpetual preferred stock, series A		115,000
Non-cumulative perpetual preferred stock, oustanding					100,000
Antidilutive common stock equivalents		800,000	800,000	1,400,000
Citizens Republic Bancorp
Business Acquisition [Line Items]
Interest rate of non-cumulative perpetual preferred stock, series A					5.875%
FirstMerit | Citizens Republic Bancorp
Business Acquisition [Line Items]
Number of securities called by warrants	2,571,998.380
Citizens Republic Bancorp | Citizens Republic Bancorp
Business Acquisition [Line Items]
Adjusted strike price	$ 17.50

Shareholders' Equity (Earnings

Shareholders' Equity (Earnings Per Share Reconciliation) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net income	$ 229,484	$ 237,951	$ 183,684
Preferred Stock dividends	5,876	5,876	5,337
Less: Net income allocated to participating shareholders	1,836	1,930	1,545
Net income attributable to common shareholders	$ 221,772	$ 230,145	$ 176,802
Weighted average number of common shares outstanding - basic	165,669	165,296	149,607
Basic earnings per common share	$ 1.34	$ 1.39	$ 1.18
Weighted average number of common shares outstanding - basic	165,669	165,296	149,607
Employee stock award plans	166,127	166,054	150,421
Diluted earnings per common share	$ 1.33	$ 1.39	$ 1.18
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock award plans	458	758	814

Changes and Reclassification138

Changes and Reclassifications Out of Other Comprehensive Income (Changes in AOCI by Components of Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance at the beginning of the Period, Pre-tax		$ (110,599)
Balance at the beginning of the period, Tax		(38,707)
Balance at the beginning of the period, After-tax		(71,892)
Changes in unrealized securities' holding gains/(losses), Pre-Tax	$ (130,947)		$ 38,864
Changes in unrealized securities' holding gains/(losses), Tax	(45,833)		13,602
Changes in unrealized securities' holding gains/(losses), After-tax	(85,114)		25,262
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity, Pre-tax	(2,187)		(2,157)
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity, Tax	(765)		(753)
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity, After-tax	(1,422)		(1,404)
Net losses/(gains) realized on sale of securities reclassified to noninterest income, Pre-Tax	2,803		(166)
Net losses/(gains) realized on sale of securities reclassified to noninterest income, Tax	981		(58)
Reclassified amount, net of tax	(1,822)		108
Balance at the beginning and end of the period, Pre-tax	(102,068)		(102,068)	$ (57,813)
Accumulated other comprehensive income reclassifications, benefit plan, tax			(35,722)	20,233
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(66,346)		(66,346)	(37,580)
Net gains/(losses) arising during the period, Pre-Tax			(49,552)	47,939
Net gains/(losses) arising during the period, Tax			(17,344)	16,779
Net gains/(losses) arising during the period, After-tax			(32,208)	31,160
Amortization of actuarial gain, Pre-Tax			(3,166)	(4,437)
Amortization of actuarial gain, Tax			(1,108)	(1,553)
Amortization of actuarial gain, After-tax			(2,058)	(2,884)
Amortization of prior service cost reclassified to other noninterest expense, Pre-Tax			(2,131)	1
Amortization of prior service cost reclassified to other noninterest expense, Tax			(747)	0
Amortization of prior service cost reclassified to other noninterest expense, After-tax			1,384	(1)
Balance at the end of the Period, Pre-tax	(110,599)	(128,546)	(110,599)
Balance at the end of the period, Tax	(38,707)	(49,272)	(38,707)
Balance at the end of the period, After-tax	(71,892)	(79,274)	(71,892)
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	(8,531)	(8,531)	(45,072)
Balance at the beginning of the period, Tax	(2,985)	(2,985)	(15,776)
Balance at the beginning of the period, After-tax	(5,546)	(5,546)	(29,296)
Changes in unrealized securities' holding gains/(losses), Pre-Tax		(19,842)
Changes in unrealized securities' holding gains/(losses), Tax		(11,253)
Changes in unrealized securities' holding gains/(losses), After-tax		(8,589)
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity, Pre-tax		(3,456)
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity, Tax		(1,254)
Changes in unrealized securities' holding gains/(losses) that result from securities being transferred into available-for-sale from held-to-maturity, After-tax		(2,202)
Net losses/(gains) realized on sale of securities reclassified to noninterest income, Pre-Tax		(957)
Net losses/(gains) realized on sale of securities reclassified to noninterest income, Tax		(348)
Reclassified amount, net of tax		609
Balance at the end of the Period, Pre-tax	(8,531)	(32,786)	(8,531)	(45,072)
Balance at the end of the period, Tax	(2,985)	(15,840)	(2,985)	(15,776)
Balance at the end of the period, After-tax	(5,546)	(16,946)	(5,546)	$ (29,296)
Pension plans and other postretirement benefits
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance at the beginning and end of the period, Pre-tax	(102,068)	(95,760)	(102,068)
Accumulated other comprehensive income reclassifications, benefit plan, tax		(33,432)	35,722
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	$ (66,346)	(62,328)	$ (66,346)
Net gains/(losses) arising during the period, Pre-Tax		116
Net gains/(losses) arising during the period, Tax		42
Net gains/(losses) arising during the period, After-tax		74
Amortization of actuarial gain, Pre-Tax		(4,552)
Amortization of actuarial gain, Tax		(1,652)
Amortization of actuarial gain, After-tax		(2,900)
Amortization of prior service cost reclassified to other noninterest expense, Pre-Tax		(1,640)
Amortization of prior service cost reclassified to other noninterest expense, Tax		(596)
Amortization of prior service cost reclassified to other noninterest expense, After-tax		$ 1,044

Changes and Reclassification139

Changes and Reclassifications Out of Other Comprehensive Income (Current Period Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014
Changes and Reclassifications Out of Comprehensive Income [Abstract]
Realized (gains) losses on sale of securities	$ (2,803)	$ 166
Tax expense (benefit)	(981)	58
Reclassified amount, net of tax	$ (1,822)	$ 108

Regulatory Matters (Narrative)

Regulatory Matters (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Regulatory Capital Requirements [Abstract]
Minimum net worth requirement of HUD	$ 1	$ 1

Regulatory Matters (Schedule of

Regulatory Matters (Schedule of Compliance with Regulatory Capital Requirements Under Banking Regulations) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Consolidated
Total Capital (to Risk Weighted Assets) [Abstract]
Total Capital	$ 2,733,143	$ 2,653,893
Total Capital to Risk Weighted Assets (Ratio)	13.74%	15.26%
Capital Required for Capital Adequacy	$ 1,591,341	$ 1,391,282
Capital Required for Capital Adequacy to Risk Weighted Assets (Ratio)	8.00%	8.00%
Capital Required to be Well Capitalized	$ 1,989,176	$ 1,739,102
Capital Required to be Well Capitalized to Risk Weighted Assets (Ratio)	10.00%	10.00%
Tier I Capital (to Average Assets) [Abstract]
Tier One Leverage Capital		$ 2,004,461
Tier One Leverage Capital to Average Assets (Ratio)	8.63%	8.43%
Tier One Leverage Capital Required for Capital Adequacy	$ 981,690	$ 951,430
Tier One Leverage Capital Required for Capital Adequacy to Average Assets (Ratio)	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 1,227,113	$ 1,189,287
Tier One Leverage Capital Required to be Well Capitalized to Average Assets (Ratio)	5.00%	5.00%
Bank Only
Total Capital (to Risk Weighted Assets) [Abstract]
Total Capital	$ 2,668,419	$ 2,521,412
Total Capital to Risk Weighted Assets (Ratio)	13.42%	14.49%
Capital Required for Capital Adequacy	$ 1,590,382	$ 1,391,988
Capital Required for Capital Adequacy to Risk Weighted Assets (Ratio)	8.00%	8.00%
Capital Required to be Well Capitalized	$ 1,987,978	$ 1,739,986
Capital Required to be Well Capitalized to Risk Weighted Assets (Ratio)	10.00%	10.00%
Tier I Capital (to Average Assets) [Abstract]
Tier One Leverage Capital		$ 2,127,065
Tier One Leverage Capital to Average Assets (Ratio)	9.23%	8.94%
Tier One Leverage Capital Required for Capital Adequacy	$ 980,975	$ 951,455
Tier One Leverage Capital Required for Capital Adequacy to Average Assets (Ratio)	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 1,226,219	$ 1,189,319
Tier One Leverage Capital Required to be Well Capitalized to Average Assets (Ratio)	5.00%	5.00%
Basel III | Consolidated
Tier I Capital (to Risk Weighted Assets) [Abstract]
Tier One Risk Based Capital	$ 2,119,025
Tier One Risk Based Capital to Risk Weighted Assets (Ratio)	10.65%
Tier One Risk Based Capital Required for Capital Adequacy	$ 895,129
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets (Ratio)	4.50%
Tier One Risk Based Capital Required to be Well Capitalized	$ 1,292,964
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets (Ratio)	6.50%
Basel III | Bank Only
Tier I Capital (to Risk Weighted Assets) [Abstract]
Tier One Risk Based Capital	$ 2,262,669
Tier One Risk Based Capital to Risk Weighted Assets (Ratio)	11.38%
Tier One Risk Based Capital Required for Capital Adequacy	$ 894,590
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets (Ratio)	4.50%
Tier One Risk Based Capital Required to be Well Capitalized	$ 1,292,185
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets (Ratio)	6.50%
Basel I | Consolidated
Tier I Capital (to Risk Weighted Assets) [Abstract]
Tier One Risk Based Capital	$ 2,119,025	$ 2,004,461
Tier One Risk Based Capital to Risk Weighted Assets (Ratio)	10.65%	11.53%
Tier One Risk Based Capital Required for Capital Adequacy	$ 1,193,506	$ 695,641
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets (Ratio)	6.00%	4.00%
Tier One Risk Based Capital Required to be Well Capitalized	$ 1,591,341	$ 1,043,461
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets (Ratio)	8.00%	6.00%
Tier I Capital (to Average Assets) [Abstract]
Tier One Leverage Capital	$ 2,119,025
Basel I | Bank Only
Tier I Capital (to Risk Weighted Assets) [Abstract]
Tier One Risk Based Capital	$ 2,262,669	$ 2,127,065
Tier One Risk Based Capital to Risk Weighted Assets (Ratio)	11.38%	12.22%
Tier One Risk Based Capital Required for Capital Adequacy	$ 1,192,787	$ 695,994
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets (Ratio)	6.00%	4.00%
Tier One Risk Based Capital Required to be Well Capitalized	$ 1,590,382	$ 1,043,991
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets (Ratio)	8.00%	6.00%
Tier I Capital (to Average Assets) [Abstract]
Tier One Leverage Capital	$ 2,262,669

Subsequent Events (Details)

Subsequent Events (Details) - FirstMerit - The Huntington National Bank - Subsequent Event $ / shares in Units, $ in Millions	Jan. 25, 2016USD ($)$ / shares
Subsequent Event [Line Items]
Share Price	$ 8.80
Consideration transferred in business combination | $	$ 3,400
Number of shares received in business combination	$ 1.72
Cash consideration received in business combination	5
Per share consideration value	$ 20.14