Fulton Financial (FULT) 10-Q 7 Aug 15 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 31, 2015
Document and Entity Information
Entity Registrant Name	FULTON FINANCIAL CORP
Entity Central Index Key	700,564
Trading Symbol	fult
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		174,944,000

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$ 100,455	$ 105,702
Interest-bearing deposits with other banks	322,218	358,130
Federal Reserve Bank and Federal Home Loan Bank stock	65,106	64,953
Loans held for sale	33,980	17,522
Available for sale investment securities	2,440,492	2,323,371
Loans, net of unearned income	13,244,230	13,111,716
Less: Allowance for loan losses	(167,485)	(184,144)
Net Loans	13,076,745	12,927,572
Premises and equipment	226,794	226,027
Accrued interest receivable	41,193	41,818
Goodwill and intangible assets	531,567	531,803
Other assets	526,923	527,869
Total Assets	17,365,473	17,124,767
LIABILITIES
Noninterest-bearing	3,805,165	3,640,623
Interest-bearing	9,700,544	9,726,883
Total Deposits	13,505,709	13,367,506
Short-term borrowings:
Federal funds purchased	5,058	6,219
Other short-term borrowings	403,977	323,500
Total Short-Term Borrowings	409,035	329,719
Accrued interest payable	15,172	18,045
Other liabilities	278,099	273,419
Federal Home Loan Bank advances and long-term debt	1,132,641	1,139,413
Total Liabilities	15,340,656	15,128,102
SHAREHOLDERS’ EQUITY
Common stock, $2.50 par value, 600 million shares authorized, 218.5 million shares issued in 2015 and 218.2 million shares issued in 2014	546,219	545,555
Additional paid-in capital	1,445,315	1,420,523
Retained earnings	603,597	558,810
Accumulated other comprehensive loss	(22,877)	(17,722)
Treasury stock, at cost, 42.5 million shares in 2015 and 39.3 million shares in 2014	(547,437)	(510,501)
Total Shareholders’ Equity	2,024,817	1,996,665
Total Liabilities and Shareholders’ Equity	$ 17,365,473	$ 17,124,767

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Common stock, par value	$ 2.5	$ 2.5
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares issued	218,500,000	218,200,000
Treasury stock, shares	42,500,000	39,300,000

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
INTEREST INCOME
Loans, including fees	$ 129,910	$ 131,440	$ 259,687	$ 263,270
Investment securities:
Taxable	10,944	12,418	22,226	25,684
Tax-exempt	1,881	2,298	3,968	4,646
Dividends	296	325	644	657
Loans held for sale	265	214	438	348
Other interest income	933	1,207	3,038	2,089
Total Interest Income	144,229	147,902	290,001	296,694
INTEREST EXPENSE
Deposits	10,053	8,685	19,876	16,581
Short-term borrowings	103	540	180	1,173
Long-term debt	11,153	10,779	23,444	21,477
Total Interest Expense	21,309	20,004	43,500	39,231
Net Interest Income	122,920	127,898	246,501	257,463
Provision for credit losses	2,200	3,500	(1,500)	6,000
Net Interest Income After Provision for Credit Losses	120,720	124,398	248,001	251,463
NON-INTEREST INCOME
Service charges on deposit accounts	12,637	12,552	24,206	24,263
Investment management and trust services	11,011	11,339	21,900	22,297
Other service charges and fees	10,988	10,526	20,351	19,453
Mortgage banking income	5,339	5,741	10,027	9,346
Investment securities gains, net:
Net gains on sales of investment securities	2,415	1,124	6,560	1,124
Other-than-temporary impairment losses	0	12	0	12
Investment securities gains, net	2,415	1,112	6,560	1,112
Other	4,099	3,602	8,182	6,907
Total Non-Interest Income	46,489	44,872	91,226	83,378
NON-INTEREST EXPENSE
Salaries and employee benefits	65,067	63,623	130,057	123,189
Net occupancy expense	11,809	11,464	25,501	25,067
Other outside services	8,125	7,240	13,875	11,052
Data processing	4,894	4,331	9,662	8,127
Software	3,376	3,209	6,694	6,134
Equipment expense	3,335	3,360	7,293	6,962
Marketing	2,885	2,615	5,707	5,304
Supplies and postage	2,731	3,559	5,602	6,463
Telecommunications	2,726	2,451	5,095	4,777
Marketing	2,235	2,337	3,468	3,921
Telecommunications	1,617	1,787	3,333	3,606
Operating risk loss	674	716	1,501	2,544
Other real estate owned and repossession expense	129	748	1,491	1,731
Intangible amortization	106	315	236	630
Other	8,645	8,419	17,317	16,221
Total Non-Interest Expense	118,354	116,174	236,832	225,728
Income Before Income Taxes	48,855	53,096	102,395	109,113
Income taxes	12,175	13,500	25,679	27,734
Net Income	$ 36,680	$ 39,596	$ 76,716	$ 81,379
PER SHARE:
Net Income (Basic) (in dollars per share)	$ 0.21	$ 0.21	$ 0.43	$ 0.43
Net Income (Diluted) (in dollars per share)	0.21	0.21	0.43	0.43
Cash Dividends (in dollars per share)	$ 0.09	$ 0.08	$ 0.18	$ 0.16

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net Income	$ 36,680	$ 39,596	$ 76,716	$ 81,379
Other Comprehensive Income (Loss), net of tax:
Unrealized gain (loss) on securities	(12,008)	12,990	(2,016)	26,923
Reclassification adjustment for postretirement amendment gains included in net income	0	0	0	(944)
Reclassification adjustment for securities gains included in net income	(1,569)	(723)	(4,264)	(723)
Non-credit related unrealized gain on other-than-temporarily impaired debt securities	0	323	125	512
Unrealized gain on derivative financial instruments	34	34	68	68
Unrecognized postretirement income arising due to plan amendment	0	0	0	2,144
Amortization of net unrecognized pension and postretirement items	466	104	932	200
Other Comprehensive Income (Loss)	(13,077)	12,728	(5,155)	28,180
Total Comprehensive Income	$ 23,603	$ 52,324	$ 71,561	$ 109,559

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Share Repurchase Program [Member]	Accelerated Stock Repurchase Program [Member]	Common Stock [Member]	Common Stock [Member]Share Repurchase Program [Member]	Common Stock [Member]Accelerated Stock Repurchase Program [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member]Accelerated Stock Repurchase Program [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Treasury Stock [Member]Share Repurchase Program [Member]	Treasury Stock [Member]Accelerated Stock Repurchase Program [Member]
Beginning Balance at Dec. 31, 2013	$ 2,063,187			$ 544,568			$ 1,432,974		$ 463,843	$ (37,341)	$ (340,857)
Beginning Balance (in shares) at Dec. 31, 2013				192,652
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	81,379								81,379
Other comprehensive loss	28,180									28,180
Stock issued, including related tax benefits	4,070			$ 498			763				2,809
Stock issued, including related tax benefits (in shares)				381
Stock-based compensation awards	3,022						3,022
Acquisition of treasury stock (in shares)				(4,000)
Acquisition of treasury stock	(49,804)										(49,804)
Common stock cash dividends	(30,234)								(30,234)
Ending Balance at Jun. 30, 2014	2,099,800			$ 545,066			1,436,759		514,988	(9,161)	(387,852)
Ending Balance (in shares) at Jun. 30, 2014				189,033
Beginning Balance at Dec. 31, 2014	1,996,665			$ 545,555			1,420,523		558,810	(17,722)	(510,501)
Beginning Balance (in shares) at Dec. 31, 2014				178,924
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	76,716								76,716
Other comprehensive loss	(5,155)									(5,155)
Stock issued, including related tax benefits	4,695			$ 664			1,954				2,077
Stock issued, including related tax benefits (in shares)				423
Stock-based compensation awards	$ 2,838						2,838
Acquisition of treasury stock (in shares)	(1,500)				(1,538)	(1,790)
Acquisition of treasury stock		$ (19,013)	$ 0					$ 20,000				$ (19,013)	$ (20,000)
Common stock cash dividends	$ (31,929)								(31,929)
Ending Balance at Jun. 30, 2015	$ 2,024,817			$ 546,219			$ 1,445,315		$ 603,597	$ (22,877)	$ (547,437)
Ending Balance (in shares) at Jun. 30, 2015				176,019

Consolidated Statements of Sha7

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends per share	$ 0.09	$ 0.08	$ 0.18	$ 0.16

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 76,716	$ 81,379
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	(1,500)	6,000
Depreciation and amortization of premises and equipment	13,920	12,354
Net amortization of investment securities premiums	3,288	2,908
Net gains on sales of investment securities	(6,560)	(1,112)
Net increase in loans held for sale	(16,458)	(14,728)
Amortization of intangible assets	236	630
Stock-based compensation	2,838	3,022
Excess tax benefits from stock-based compensation	(63)	(52)
Decrease in accrued interest receivable	625	1,921
Decrease (increase) in other assets	9,818	(3,039)
(Decrease) increase in accrued interest payable	(2,873)	1,429
(Decrease) increase in other liabilities	(2,959)	3,646
Total adjustments	312	12,979
Net cash provided by operating activities	77,028	94,358
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities available for sale	18,815	15,189
Proceeds from maturities of securities available for sale	205,620	174,619
Purchase of securities available for sale	(346,322)	(60,952)
Decrease (increase) in short-term investments	35,759	(57,357)
Net increase in loans	(147,492)	(74,766)
Net purchases of premises and equipment	(14,687)	(11,501)
Net cash used in investing activities	(248,307)	(14,768)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand and savings deposits	205,901	104,390
Net (decrease) increase in time deposits	(67,698)	98,083
Increase (decrease) in short-term borrowings	79,316	(250,322)
Additions to long-term debt	148,099	90,000
Repayments of long-term debt	(154,871)	(5,189)
Net proceeds from issuance of common stock	4,632	4,018
Excess tax benefits from stock-based compensation	63	52
Dividends paid	(30,397)	(30,521)
Acquisition of treasury stock	(19,013)	(49,804)
Net cash provided by (used in) financing activities	166,032	(39,293)
Net (Decrease) Increase in Cash and Due From Banks	(5,247)	40,297
Cash and Due From Banks at Beginning of Period	105,702	218,540
Cash and Due From Banks at End of Period	100,455	258,837
Cash paid during the period for:
Interest	46,373	37,802
Income taxes	$ 11,051	$ 16,407

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements of Fulton Financial Corporation (the "Corporation") have been prepared in conformity with U.S. generally accepted accounting principles ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and notes required by U.S. GAAP for complete financial statements. The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the amounts of assets and liabilities as of the date of the financial statements as well as revenues and expenses during the period. Actual results could differ from those estimates. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2014. Operating results for the three and six months ended June 30, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015 . The Corporation evaluates subsequent events through the date of filing of this Form 10-Q with the Securities and Exchange Commission ("SEC"). Recent Accounting Standards Effective January 1, 2015, the Corporation adopted the Financial Accounting Standards Board's ("FASB") Accounting Standards Codification ("ASC") Update 2014-01, "Accounting for Investments in Qualified Affordable Housing Projects." ASC Update 2014-01 provides guidance on accounting for investments made by a reporting entity in flow-through limited liability entities that manage or invest in affordable housing projects that qualify for the low income housing tax credit. The Corporation has made certain investments in partnerships that generate tax credits under various federal programs which promote investment in low and moderate income housing and local economic development. The net income tax benefit associated with these investments, which consists of the amortization of the investments net of tax benefits, and the income tax credits earned on the investments recorded in income taxes on the consolidated income statements was $2.4 million and $2.8 million for the three months ended June 30, 2015 and 2014, respectively and $4.8 million and $5.3 million for the six months ended June 30, 2015 and 2014, respectively. As of June 30, 2015 and December 31, 2014, the Corporation’s tax credit investments, included in other assets on the consolidated balance sheets, totaled $156.8 million and $155.6 million , respectively. The adoption of this ASC update did not have a material impact on the Corporation's consolidated financial statements for the three or six months ended June 30, 2015 or 2014. In February 2015, the FASB issued ASC Update 2015-02, "Consolidation: Amendments to the Consolidation Analysis." ASC Update 2015-02 changes the way reporting enterprises evaluate whether: (a) they should consolidate limited partnerships and similar entities, (b) fees paid to a decision maker or service provider are variable interests in a variable interest entity ("VIE"), and (c) variable interests in a VIE held by related parties of the reporting enterprise require the reporting enterprise to consolidate the VIE. ASC Update 2015-02 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q, and does not expect the adoption of ASC Update 2015-02 to have a material impact on its consolidated financial statements. In April 2015, the FASB issued ASC Update 2015-03, "Interest - Imputation of Interest." ASC Update 2015-03 simplifies the presentation of debt issuances costs. Debt issuance costs related to a recognized debt liability will be presented on the balance sheet as a direct deduction from the debt liability, similar to the presentation of debt discounts. Under current U.S. GAAP, debt issuance costs are reported on the balance sheet as assets. The costs will continue to be amortized to interest expense using the effective interest method. ASC Update 2015-03 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q and does not expect the adoption of ASC Update 2015-03 to have a material impact on its consolidated financial statements. In April 2015, the FASB issued ASC Update 2015-05, "Customer's Accounting for Fees Paid in a Cloud Computing Arrangement." ASC Update 2015-05 provides explicit guidance to determine when a customer's fees paid in a cloud computing arrangement is for the acquisition of software licenses, services, or both. ASC Update 2015-05 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q and does not expect the adoption of ASC Update 2015-05 to have a material impact on its consolidated financial statements.

Net Income Per Share

Net Income Per Share	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Net Income Per Share	Net Income Per Share Basic net income per share is calculated as net income divided by the weighted average number of shares outstanding. Diluted net income per share is calculated as net income divided by the weighted average number of shares outstanding plus the incremental number of shares added as a result of converting common stock equivalents, calculated using the treasury stock method. The Corporation’s common stock equivalents consist of outstanding stock options, restricted stock, restricted stock units ("RSUs") and performance based restricted stock units ("PSUs"). PSUs are required to be included in weighted average shares outstanding if performance measures, as defined in each PSU award agreement, are met as of the end of the period. A reconciliation of weighted average shares outstanding used to calculate basic net income per share and diluted net income per share follows: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Weighted average shares outstanding (basic) 176,433 188,139 177,446 188,799 Impact of common stock equivalents 1,098 1,043 1,042 1,033 Weighted average shares outstanding (diluted) 177,531 189,182 178,488 189,832 For the three and six months ended June 30, 2015 , 1.8 million and 2.0 million stock options, respectively, were excluded from the diluted net income per share computation as their effect would have been anti-dilutive. For the three and six months ended June 30, 2014 , 3.3 million and 3.2 million stock options, respectively, were excluded from the diluted net income per share computation as their effect would have been anti-dilutive.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income The following table presents changes in other comprehensive income: Before-Tax Amount Tax Effect Net of Tax Amount (in thousands) Three months ended June 30, 2015 Unrealized loss on securities $ (18,474 ) $ 6,466 $ (12,008 ) Reclassification adjustment for securities gains included in net income (1) (2,413 ) 844 (1,569 ) Unrealized gain on derivative financial instruments 52 (18 ) 34 Amortization of net unrecognized pension and postretirement items (2) 717 (251 ) 466 Total Other Comprehensive Loss $ (20,118 ) $ 7,041 $ (13,077 ) Three months ended June 30, 2014 Unrealized gain on securities $ 19,984 $ (6,994 ) $ 12,990 Reclassification adjustment for securities gains included in net income (1) (1,112 ) 389 (723 ) Non-credit related unrealized gains on other-than-temporarily impaired debt securities 497 (174 ) 323 Unrealized gain on derivative financial instruments 52 (18 ) 34 Amortization of net unrecognized pension and postretirement items (2) 160 (56 ) 104 Total Other Comprehensive Income $ 19,581 $ (6,853 ) $ 12,728 Six months ended June 30, 2015 Unrealized loss on securities $ (3,103 ) $ 1,087 $ (2,016 ) Reclassification adjustment for securities gains included in net income (1) (6,558 ) 2,294 (4,264 ) Non-credit related unrealized gains (losses) on other-than-temporarily impaired debt securities 192 (67 ) 125 Unrealized gain on derivative financial instruments 104 (36 ) 68 Amortization of net unrecognized pension and postretirement items (2) 1,434 (502 ) 932 Total Other Comprehensive Loss $ (7,931 ) $ 2,776 $ (5,155 ) Six months ended June 30, 2014 Unrealized gain on securities $ 41,419 $ (14,496 ) $ 26,923 Reclassification adjustment for securities gains included in net income (1) (1,112 ) 389 (723 ) Reclassification adjustment for postretirement gains included in net income (2) (1,452 ) 508 (944 ) Non-credit related unrealized gains (losses) on other-than-temporarily impaired debt securities 788 (276 ) 512 Unrealized gain on derivative financial instruments 105 (37 ) 68 Unrecognized pension and postretirement income 3,291 (1,147 ) 2,144 Amortization of net unrecognized pension and postretirement items (2) 309 (109 ) 200 Total Other Comprehensive Income $ 43,348 $ (15,168 ) $ 28,180 (1) Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included within "Investment securities gains, net" on the consolidated statements of income. See Note 4, "Investment Securities," for additional details. (2) Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included within "Salaries and employee benefits" on the consolidated statements of income. See Note 8, "Employee Benefit Plans," for additional details. The following table presents changes in each component of accumulated other comprehensive income, net of tax: Unrealized Gains (Losses) on Investment Securities Not Other-Than-Temporarily Impaired Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities Unrealized Effective Portions of Losses on Forward-Starting Interest Rate Swaps Unrecognized Pension and Postretirement Plan Income (Costs) Total (in thousands) Three months ended June 30, 2015 Balance at March 31, 2015 $ 14,311 $ 440 $ (2,512 ) $ (22,039 ) $ (9,800 ) Other comprehensive loss before reclassifications (12,008 ) — — — (12,008 ) Amounts reclassified from accumulated other comprehensive income (loss) (1,473 ) (96 ) 34 466 (1,069 ) Balance at June 30, 2015 $ 830 $ 344 $ (2,478 ) $ (21,573 ) $ (22,877 ) Three months ended June 30, 2014 Balance at March 31, 2014 $ (13,577 ) $ 1,841 $ (2,648 ) $ (7,505 ) $ (21,889 ) Other comprehensive income before reclassifications 12,990 323 — — 13,313 Amounts reclassified from accumulated other comprehensive income (loss) 7 (730 ) 34 104 (585 ) Balance at June 30, 2014 $ (580 ) $ 1,434 $ (2,614 ) $ (7,401 ) $ (9,161 ) Six months ended June 30, 2015 Balance at December 31, 2014 $ 5,980 $ 1,349 $ (2,546 ) $ (22,505 ) $ (17,722 ) Other comprehensive income (loss) before reclassifications (2,016 ) 125 — — (1,891 ) Amounts reclassified from accumulated other comprehensive income (loss) (3,134 ) (1,130 ) 68 932 (3,264 ) Balance at June 30, 2015 $ 830 $ 344 $ (2,478 ) $ (21,573 ) $ (22,877 ) Six months ended June 30, 2014 Balance at December 31, 2013 $ (27,510 ) $ 1,652 $ (2,682 ) $ (8,801 ) $ (37,341 ) Other comprehensive income before reclassifications 26,923 512 — 2,144 29,579 Amounts reclassified from accumulated other comprehensive income (loss) 7 (730 ) 68 (744 ) (1,399 ) Balance at June 30, 2014 $ (580 ) $ 1,434 $ (2,614 ) $ (7,401 ) $ (9,161 )

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The following table presents the amortized cost and estimated fair values of investment securities, which were all classified as available for sale: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) June 30, 2015 Equity securities $ 23,981 $ 9,072 $ (12 ) $ 33,041 U.S. Government sponsored agency securities 48,333 57 (130 ) 48,260 State and municipal securities 231,592 5,312 (387 ) 236,517 Corporate debt securities 98,756 3,183 (4,767 ) 97,172 Collateralized mortgage obligations 931,093 4,932 (17,793 ) 918,232 Mortgage-backed securities 998,418 14,112 (3,866 ) 1,008,664 Auction rate securities 106,504 — (7,898 ) 98,606 $ 2,438,677 $ 36,668 $ (34,853 ) $ 2,440,492 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) December 31, 2014 Equity securities $ 33,469 $ 14,167 $ (13 ) $ 47,623 U.S. Government securities 200 — — 200 U.S. Government sponsored agency securities 209 5 — 214 State and municipal securities 238,250 7,231 (266 ) 245,215 Corporate debt securities 99,016 5,126 (6,108 ) 98,034 Collateralized mortgage obligations 917,395 5,705 (20,787 ) 902,313 Mortgage-backed securities 914,797 16,978 (2,944 ) 928,831 Auction rate securities 108,751 — (7,810 ) 100,941 $ 2,312,087 $ 49,212 $ (37,928 ) $ 2,323,371 Securities carried at $1.6 billion as of June 30, 2015 and $1.7 billion as of December 31, 2014 were pledged as collateral to secure public and trust deposits and customer repurchase agreements. Equity securities include common stocks of financial institutions (estimated fair value of $27.2 million at June 30, 2015 and $41.8 million at December 31, 2014 ) and other equity investments (estimated fair value of $5.8 million at both June 30, 2015 and December 31, 2014 ). As of June 30, 2015 , the financial institutions stock portfolio had a cost basis of $18.2 million and an estimated fair value of $27.2 million , including an investment in a single financial institution with a cost basis of $10.7 million and an estimated fair value of $15.7 million . The estimated fair value of this investment accounted for 57.7% of the estimated fair value of the Corporation's investments in the common stocks of publicly traded financial institutions. No other investment within the financial institutions stock portfolio exceeded 5% of the portfolio's estimated fair value. The amortized cost and estimated fair values of debt securities as of June 30, 2015 , by contractual maturity, are shown in the following table. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Estimated (in thousands) Due in one year or less $ 57,382 $ 58,372 Due from one year to five years 104,022 106,663 Due from five years to ten years 148,682 151,430 Due after ten years 175,099 164,090 485,185 480,555 Collateralized mortgage obligations 931,093 918,232 Mortgage-backed securities 998,418 1,008,664 $ 2,414,696 $ 2,407,451 The following table presents information related to the gross realized gains and losses on the sales of equity and debt securities: Gross Gross Other-than- Net Gains (Losses) Three months ended June 30, 2015 (in thousands) Equity securities $ 2,290 $ — $ — $ 2,290 Debt securities 125 — — 125 Total $ 2,415 $ — $ — $ 2,415 Three months ended June 30, 2014 Equity securities $ — $ — $ (12 ) $ (12 ) Debt securities 1,124 — — 1,124 Total $ 1,124 $ — $ (12 ) $ 1,112 Six months ended June 30, 2015 Equity securities $ 4,260 $ — $ — $ 4,260 Debt securities 2,300 — — 2,300 Total $ 6,560 $ — $ — $ 6,560 Six months ended June 30, 2014 Equity securities $ 1 $ — $ (12 ) $ (11 ) Debt securities 1,446 (323 ) — 1,123 Total $ 1,447 $ (323 ) $ (12 ) $ 1,112 The following table presents a summary of the cumulative credit related other-than-temporary impairment charges, recognized as components of earnings, for debt securities held by the Corporation at June 30, 2015 and 2014: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Balance of cumulative credit losses on debt securities, beginning of period $ (12,302 ) $ (19,961 ) $ (16,242 ) $ (20,691 ) Reductions for securities sold during the period 792 2,746 4,730 3,472 Reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security — 1 2 5 Balance of cumulative credit losses on debt securities, end of period $ (11,510 ) $ (17,214 ) $ (11,510 ) $ (17,214 ) The following table presents the gross unrealized losses and estimated fair values of investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at June 30, 2015 : Less than 12 months 12 months or longer Total Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses (in thousands) U.S. Government sponsored agency securities $ 28,051 $ (130 ) $ — $ — $ 28,051 $ (130 ) State and municipal securities 34,107 (387 ) — — 34,107 (387 ) Corporate debt securities 7,965 (13 ) 35,229 (4,754 ) 43,194 (4,767 ) Collateralized mortgage obligations 95,315 (651 ) 517,338 (17,142 ) 612,653 (17,793 ) Mortgage-backed securities 306,980 (2,498 ) 69,029 (1,368 ) 376,009 (3,866 ) Auction rate securities — — 98,606 (7,898 ) 98,606 (7,898 ) Total debt securities 472,418 (3,679 ) 720,202 (31,162 ) 1,192,620 (34,841 ) Equity securities — — 78 (12 ) 78 (12 ) $ 472,418 $ (3,679 ) $ 720,280 $ (31,174 ) $ 1,192,698 $ (34,853 ) The Corporation’s collateralized mortgage obligations and mortgage-backed securities have contractual terms that generally do not permit the issuer to settle the securities at a price less than the amortized cost of the investment. Because the decline in market value of these securities is attributable to changes in interest rates and not credit quality, and because the Corporation does not have the intent to sell and does not believe it will more likely than not be required to sell any of these securities prior to a recovery of their fair value to amortized cost, the Corporation does not consider these investments to be other-than-temporarily impaired as of June 30, 2015 . The unrealized holding losses on auction rate securities (auction rate certificates, or "ARCs"), are attributable to liquidity issues resulting from the failure of periodic auctions. The Corporation had previously purchased ARCs for investment management and trust customers as short-term investments with fair values that could be derived based on periodic auctions under normal market conditions. During 2008 and 2009, the Corporation purchased ARCs from these customers due to the failure of these periodic auctions, which made these previously short-term investments illiquid. As of June 30, 2015 , all of the ARCs were rated above investment grade, with approximately $6 million , or 6% , "AAA" rated and $93 million , or 94% , "AA" rated. All of the loans underlying the ARCs have principal payments which are guaranteed by the federal government. As of June 30, 2015 , all ARCs were current and making scheduled interest payments. Based on management’s evaluations, ARCs with an estimated fair value of $98.6 million were not subject to any other-than-temporary impairment charges as of June 30, 2015 . The Corporation does not have the intent to sell and does not believe it will more likely than not be required to sell any of these securities prior to a recovery of their fair value to amortized cost, which may be at maturity. For its investments in equity securities, particularly its investments in stocks of financial institutions, management evaluates the near-term prospects of the issuers in relation to the severity and duration of the impairment. Based on that evaluation and the Corporation’s ability and intent to hold those investments for a reasonable period of time sufficient for a recovery of fair value, the Corporation does not consider those investments with unrealized holding losses as of June 30, 2015 to be other-than-temporarily impaired. The majority of the Corporation's available for sale corporate debt securities are issued by financial institutions. The following table presents the amortized cost and estimated fair value of corporate debt securities: June 30, 2015 December 31, 2014 Amortized cost Estimated fair value Amortized cost Estimated fair value (in thousands) Single-issuer trust preferred securities $ 47,613 $ 43,378 $ 47,569 $ 42,016 Subordinated debt 47,595 49,716 47,530 50,023 Pooled trust preferred securities — 530 2,010 4,088 Corporate debt securities issued by financial institutions 95,208 93,624 97,109 96,127 Other corporate debt securities 3,548 3,548 1,907 1,907 Available for sale corporate debt securities $ 98,756 $ 97,172 $ 99,016 $ 98,034 The Corporation’s investments in single-issuer trust preferred securities had an unrealized loss of $4.2 million at June 30, 2015 . The Corporation did not record any other-than-temporary impairment charges for single-issuer trust preferred securities during the three or six months ended June 30, 2015 or 2014 . Seven of the Corporation's 19 single-issuer trust preferred securities were rated below investment grade by at least one ratings agency, with an amortized cost of $14.5 million and an estimated fair value of $13.1 million at June 30, 2015 . All of the single-issuer trust preferred securities rated below investment grade were rated "BB" or "Ba". Three single-issuer trust preferred securities with an amortized cost of $4.7 million and an estimated fair value of $3.8 million at June 30, 2015 were not rated by any ratings agency. During the six months ended June 30, 2015 , the Corporation sold three pooled trust preferred securities with a total amortized cost of $1.9 million , for a gain of $2.3 million . As of June 30, 2015 , both of the Corporation's remaining pooled trust preferred securities, with an amortized cost of $0 and an estimated fair value of $530,000 , were rated below investment grade by at least one ratings agency, with ratings ranging from "C" to "Ca". The class of securities held by the Corporation was below the most senior tranche, with the Corporation’s interests being subordinate to other investors in the pool. The Corporation determines the fair value of pooled trust preferred securities based on quotes provided by third-party brokers. The amortized cost of pooled trust preferred securities is the purchase price of the securities, net of cumulative credit related other-than-temporary impairment charges, determined using an expected cash flows model. The most significant input to the expected cash flows model is the expected payment deferral rate for each pooled trust preferred security. The Corporation evaluates the financial metrics, such as capital ratios and non-performing assets ratios, of the individual financial institution issuers that comprise each pooled trust preferred security to estimate its expected deferral rate. Based on management’s evaluations, corporate debt securities with a fair value of $97.2 million were not subject to any other-than-temporary impairment charges as of June 30, 2015 . The Corporation does not have the intent to sell and does not believe it will more likely than not be required to sell any of these securities prior to a recovery of their fair value to amortized cost, which may be at maturity.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	6 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Loans and Allowance for Credit Losses Loans, Net of Unearned Income Loans, net of unearned income are summarized as follows: June 30, December 31, 2014 (in thousands) Real-estate - commercial mortgage $ 5,237,800 $ 5,197,155 Commercial - industrial, financial and agricultural 3,806,699 3,725,567 Real-estate - home equity 1,689,688 1,736,688 Real-estate - residential mortgage 1,369,103 1,377,068 Real-estate - construction 731,925 690,601 Consumer 272,494 265,431 Leasing and other 147,960 127,562 Overdrafts 2,642 4,021 Loans, gross of unearned income 13,258,311 13,124,093 Unearned income (14,081 ) (12,377 ) Loans, net of unearned income $ 13,244,230 $ 13,111,716 Allowance for Credit Losses The allowance for credit losses consists of the allowance for loan losses and the reserve for unfunded lending commitments. The allowance for loan losses represents management’s estimate of incurred losses in the loan portfolio as of the balance sheet date and is recorded as a reduction to loans. The reserve for unfunded lending commitments represents management’s estimate of incurred losses in its unfunded loan commitments and is recorded in other liabilities on the consolidated balance sheet. The allowance for credit losses is increased by charges to expense, through the provision for credit losses, and decreased by charge-offs, net of recoveries. The Corporation’s allowance for credit losses includes: (1) specific allowances allocated to loans evaluated for impairment under the FASB's ASC Section 310-10-35; and (2) allowances calculated for pools of loans measured for impairment under FASB ASC Subtopic 450-20. The Corporation segments its loan portfolio by general loan type, or "portfolio segments," as presented in the table under the heading, "Loans, Net of Unearned Income," above. Certain portfolio segments are further disaggregated and evaluated collectively for impairment based on "class segments," which are largely based on the type of collateral underlying each loan. Commercial loans include loans secured by collateral and unsecured loans. Construction loan class segments include loans secured by commercial real estate, loans to commercial borrowers secured by residential real estate and loans to individuals secured by residential real estate. Consumer loan class segments include direct consumer installment loans and indirect automobile loans. The following table presents the components of the allowance for credit losses: June 30, December 31, (in thousands) Allowance for loan losses $ 167,485 $ 184,144 Reserve for unfunded lending commitments 1,968 1,787 Allowance for credit losses $ 169,453 $ 185,931 The following table presents the activity in the allowance for credit losses: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Balance at beginning of period $ 179,658 $ 199,006 $ 185,931 $ 204,917 Loans charged off (15,372 ) (11,476 ) (21,136 ) (21,744 ) Recoveries of loans previously charged off 2,967 2,412 6,158 4,269 Net loans charged off (12,405 ) (9,064 ) (14,978 ) (17,475 ) Provision for credit losses 2,200 3,500 (1,500 ) 6,000 Balance at end of period $ 169,453 $ 193,442 $ 169,453 $ 193,442 The following table presents the activity in the allowance for loan losses by portfolio segment: Real Estate - Commercial Mortgage Commercial - Industrial, Financial and Agricultural Real Estate - Home Equity Real Estate - Residential Mortgage Real Estate - Construction Consumer Leasing and other and overdrafts Unallocated Total (in thousands) Three months ended June 30, 2015 Balance at March 31, 2015 $ 52,860 $ 57,150 $ 23,481 $ 23,235 $ 8,487 $ 2,527 $ 1,653 $ 8,308 $ 177,701 Loans charged off (1,642 ) (11,166 ) (870 ) (783 ) (87 ) (357 ) (467 ) — (15,372 ) Recoveries of loans previously charged off 451 1,471 189 187 231 368 70 — 2,967 Net loans charged off (1,191 ) (9,695 ) (681 ) (596 ) 144 11 (397 ) — (12,405 ) Provision for loan losses (1) (989 ) 1,715 (294 ) 148 (882 ) 70 359 2,062 2,189 Balance at June 30, 2015 $ 50,680 $ 49,170 $ 22,506 $ 22,787 $ 7,749 $ 2,608 $ 1,615 $ 10,370 $ 167,485 Three months ended June 30, 2014 Balance at March 31, 2014 $ 53,757 $ 50,563 $ 32,460 $ 33,329 $ 9,842 $ 3,324 $ 2,011 $ 11,803 $ 197,089 Loans charged off (2,141 ) (5,512 ) (1,234 ) (1,089 ) (218 ) (449 ) (833 ) — (11,476 ) Recoveries of loans previously charged off 430 775 177 108 158 402 362 — 2,412 Net loans charged off (1,711 ) (4,737 ) (1,057 ) (981 ) (60 ) (47 ) (471 ) — (9,064 ) Provision for loan losses (1) (2,204 ) 3,258 638 396 1,549 29 311 (317 ) 3,660 Balance at June 30, 2014 $ 49,842 $ 49,084 $ 32,041 $ 32,744 $ 11,331 $ 3,306 $ 1,851 $ 11,486 $ 191,685 Six months ended June 30, 2015 Balance at December 31, 2014 $ 53,493 $ 51,378 $ 28,271 $ 29,072 $ 9,756 $ 3,015 $ 1,799 $ 7,360 $ 184,144 Loans charged off (2,351 ) (13,029 ) (1,638 ) (2,064 ) (87 ) (1,137 ) (830 ) — (21,136 ) Recoveries of loans previously charged off 887 2,257 440 346 1,378 609 241 — 6,158 Net loans charged off (1,464 ) (10,772 ) (1,198 ) (1,718 ) 1,291 (528 ) (589 ) — (14,978 ) Provision for loan losses (1) (1,349 ) 8,564 (4,567 ) (4,567 ) (3,298 ) 121 405 3,010 (1,681 ) Balance at June 30, 2015 $ 50,680 $ 49,170 $ 22,506 $ 22,787 $ 7,749 $ 2,608 $ 1,615 $ 10,370 $ 167,485 Six months ended June 30, 2014 Balance at December 31, 2013 $ 55,659 $ 50,330 $ 28,222 $ 33,082 $ 12,649 $ 3,260 $ 3,370 $ 16,208 $ 202,780 Loans charged off (3,527 ) (10,637 ) (2,885 ) (1,935 ) (432 ) (1,200 ) (1,128 ) — (21,744 ) Recoveries of loans previously charged off 474 1,519 533 224 382 611 526 — 4,269 Net loans charged off (3,053 ) (9,118 ) (2,352 ) (1,711 ) (50 ) (589 ) (602 ) — (17,475 ) Provision for loan losses (1) (2,764 ) 7,872 6,171 1,373 (1,268 ) 635 (917 ) (4,722 ) 6,380 Balance at June 30, 2014 $ 49,842 $ 49,084 $ 32,041 $ 32,744 $ 11,331 $ 3,306 $ 1,851 $ 11,486 $ 191,685 (1) The provision for loan losses excluded an $11,000 and $181,000 increase, respectively, in the reserve for unfunded lending commitments for the three and six months ended June 30, 2015 and a $160,000 and $ 380,000 decrease, respectively, in the reserve for unfunded lending commitments for the three and six months ended June 30, 2014 . The total provision for credit losses, comprised of allocations for both funded and unfunded loans, was $2.2 million and negative $1.5 million , respectively, for the three and six months ended June 30, 2015 and $3.5 million and $6.0 million , respectively, for the three and six months ended June 30, 2014 . The following table presents loans, net of unearned income and their related allowance for loan losses, by portfolio segment: Real Estate - Commercial Mortgage Commercial - Industrial, Financial and Agricultural Real Estate - Home Equity Real Estate - Residential Mortgage Real Estate - Construction Consumer Leasing and other and overdrafts Unallocated (1) Total (in thousands) Allowance for loan losses at June 30, 2015: Measured for impairment under FASB ASC Subtopic 450-20 $ 37,228 $ 38,090 $ 15,838 $ 8,763 $ 5,430 $ 2,588 $ 1,615 $ 10,370 $ 119,922 Evaluated for impairment under FASB ASC Section 310-10-35 13,452 11,080 6,668 14,024 2,319 20 — N/A 47,563 $ 50,680 $ 49,170 $ 22,506 $ 22,787 $ 7,749 $ 2,608 $ 1,615 $ 10,370 $ 167,485 Loans, net of unearned income at June 30, 2015: Measured for impairment under FASB ASC Subtopic 450-20 $ 5,172,333 $ 3,764,999 $ 1,676,410 $ 1,315,908 $ 712,975 $ 272,463 $ 136,521 N/A $ 13,051,609 Evaluated for impairment under FASB ASC Section 310-10-35 65,467 41,700 13,278 53,195 18,950 31 — N/A 192,621 $ 5,237,800 $ 3,806,699 $ 1,689,688 $ 1,369,103 $ 731,925 $ 272,494 $ 136,521 N/A $ 13,244,230 Allowance for loan losses at June 30, 2014: Measured for impairment under FASB ASC Subtopic 450-20 $ 33,388 $ 36,603 $ 22,234 $ 11,450 $ 7,163 $ 3,285 $ 1,851 $ 11,486 $ 127,460 Evaluated for impairment under FASB ASC Section 310-10-35 16,454 12,481 9,807 21,294 4,168 21 — N/A 64,225 $ 49,842 $ 49,084 $ 32,041 $ 32,744 $ 11,331 $ 3,306 $ 1,851 $ 11,486 $ 191,685 Loans, net of unearned income at June 30, 2014: Measured for impairment under FASB ASC Subtopic 450-20 $ 5,067,400 $ 3,558,788 $ 1,715,953 $ 1,309,739 $ 606,221 $ 280,534 $ 102,008 N/A $ 12,640,643 Evaluated for impairment under FASB ASC Section 310-10-35 61,334 42,933 14,544 52,237 27,797 23 — N/A 198,868 $ 5,128,734 $ 3,601,721 $ 1,730,497 $ 1,361,976 $ 634,018 $ 280,557 $ 102,008 N/A $ 12,839,511 (1) The unallocated allowance, which was approximately 6% of the total allowance for credit losses as of both June 30, 2015 and June 30, 2014 , was, in the opinion of management, reasonable and appropriate given that the estimates used in the allocation process are inherently imprecise. N/A Not applicable. Impaired Loans A loan is considered to be impaired if it is probable that all amounts will not be collected according to the contractual terms of the loan agreement. Impaired loans consist of all loans on non-accrual status and accruing troubled debt restructurings ("TDRs"). An allowance for loan losses is established for an impaired loan if its carrying value exceeds its estimated fair value. Impaired loans to borrowers with total outstanding commitments greater than or equal to $1.0 million are evaluated individually for impairment. Impaired loans to borrowers with total outstanding commitments less than $1.0 million are pooled and measured for impairment collectively. Based on an evaluation of all relevant credit quality factors, the Corporation recorded a $1.5 million negative provision for credit losses during the six months ended June 30, 2015, compared to a $6.0 million provision for credit losses for the same period in 2014. The $7.5 million improvement in the provision for credit losses was driven by an improvement in net charge-off levels, particularly among pooled impaired loans across all loan portfolio segments. All loans individually evaluated for impairment under FASB ASC Section 310-10-35 are measured for losses on a quarterly basis. As of June 30, 2015 and December 31, 2014 , substantially all of the Corporation’s individually evaluated impaired loans with total outstanding balances greater than or equal to $1.0 million were measured based on the estimated fair value of each loan’s collateral. Collateral could be in the form of real estate, in the case of impaired commercial mortgages and construction loans, or business assets, such as accounts receivable or inventory, in the case of commercial and industrial loans. Commercial and industrial loans may also be secured by real property. As of June 30, 2015 and 2014 , approximately 72% and 79% , respectively, of impaired loans with principal balances greater than or equal to $1.0 million , whose primary collateral is real estate, were measured at estimated fair value using state certified third-party appraisals that had been updated within the preceding 12 months. When updated appraisals are not obtained for loans evaluated for impairment under FASB ASC Section 310-10-35 that are secured by real estate, fair values are estimated based on the original appraisal values, as long as the original appraisal indicated an acceptable loan-to-value position and, in the opinion of the Corporation's internal loan evaluation staff, there has not been a significant deterioration in the collateral value since the original appraisal was performed. Original appraisals are typically used only when the estimated collateral value, as adjusted for the age of the appraisal, results in a current loan-to-value ratio that is lower than the Corporation's loan-to-value requirements for new loans, generally less than 70% . The following table presents total impaired loans by class segment: June 30, 2015 December 31, 2014 Unpaid Principal Balance Recorded Investment Related Allowance Unpaid Principal Balance Recorded Investment Related Allowance (in thousands) With no related allowance recorded: Real estate - commercial mortgage $ 29,836 $ 24,357 $ — $ 25,802 $ 23,236 $ — Commercial - secured 24,250 17,557 — 17,599 14,582 — Real estate - residential mortgage 6,630 6,223 — 4,873 4,873 — Construction - commercial residential 13,581 10,699 — 18,041 14,801 — Construction - commercial 1,299 1,156 — 1,707 1,581 — 75,596 59,992 68,022 59,073 With a related allowance recorded: Real estate - commercial mortgage 49,792 41,110 13,452 49,619 40,023 16,715 Commercial - secured 26,694 21,239 10,020 24,824 19,335 12,165 Commercial - unsecured 3,062 2,904 1,060 1,241 1,089 865 Real estate - home equity 18,752 13,278 6,668 19,392 13,458 9,224 Real estate - residential mortgage 56,048 46,972 14,024 56,607 46,478 18,592 Construction - commercial residential 11,976 5,472 1,771 14,007 7,903 2,675 Construction - commercial 1,879 1,342 445 1,501 1,023 459 Construction - other 452 281 103 452 281 137 Consumer - direct 15 15 10 19 19 17 Consumer - indirect 16 16 10 20 19 18 168,686 132,629 47,563 167,682 129,628 60,867 Total $ 244,282 $ 192,621 $ 47,563 $ 235,704 $ 188,701 $ 60,867 As of June 30, 2015 and December 31, 2014 , there were $60.0 million and $59.1 million , respectively, of impaired loans that did not have a related allowance for loan loss. The estimated fair values of the collateral securing these loans exceeded their carrying amount, or they were previously charged down to realizable collateral values. Accordingly, no specific valuation allowance was considered to be necessary. The following table presents average impaired loans by class segment: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 Average Interest Average Interest Average Interest Average Interest (in thousands) With no related allowance recorded: Real estate - commercial mortgage $ 27,410 $ 87 $ 23,162 $ 80 $ 26,018 $ 178 $ 23,606 166 Commercial - secured 16,163 24 21,695 34 15,636 45 21,591 69 Real estate - home equity — — 300 1 — — 300 1 Real estate - residential mortgage 5,541 32 857 5 5,318 60 571 6 Construction - commercial residential 12,171 40 17,853 62 13,048 95 16,482 122 Construction - commercial 925 — 1,418 — 1,144 — 1,604 — 62,210 183 65,285 182 61,164 378 64,154 364 With a related allowance recorded: Real estate - commercial mortgage 40,204 126 38,455 132 40,143 259 37,580 264 Commercial - secured 25,902 38 21,652 33 23,713 74 21,876 71 Commercial - unsecured 2,082 2 757 1 1,751 3 854 2 Real estate - home equity 13,016 33 14,049 28 13,163 64 14,145 48 Real estate - residential mortgage 47,020 270 51,153 300 46,839 543 51,134 594 Construction - commercial residential 6,031 21 7,676 27 6,655 49 9,977 62 Construction - commercial 960 — 723 — 981 — 547 — Construction - other 281 — 413 — 281 — 458 — Consumer - direct 17 — 16 — 18 — 14 — Consumer - indirect 17 — 4 — 17 — 3 — 135,530 490 134,898 521 133,561 992 136,588 1,041 Total $ 197,740 $ 673 $ 200,183 $ 703 $ 194,725 $ 1,370 $ 200,742 1,405 (1) All impaired loans, excluding accruing TDRs, were non-accrual loans. Interest income recognized for the three and six months ended June 30, 2015 and 2014 represents amounts earned on accruing TDRs. Credit Quality Indicators and Non-performing Assets The following table presents internal credit risk ratings for real estate - commercial mortgages, commercial - secured loans, commercial - unsecured loans, construction - commercial residential loans and construction - commercial loans: Pass Special Mention Substandard or Lower Total June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 (dollars in thousands) Real estate - commercial mortgage $ 4,943,773 $ 4,899,016 $ 114,385 $ 127,302 $ 179,642 $ 170,837 $ 5,237,800 $ 5,197,155 Commercial - secured 3,419,331 3,333,486 123,663 120,584 110,666 110,544 3,653,660 3,564,614 Commercial - unsecured 141,431 146,680 3,667 7,463 7,941 6,810 153,039 160,953 Total commercial - industrial, financial and agricultural 3,560,762 3,480,166 127,330 128,047 118,607 117,354 3,806,699 3,725,567 Construction - commercial residential 138,834 136,109 17,526 27,495 30,588 40,066 186,948 203,670 Construction - commercial 469,515 409,631 13,314 12,202 5,587 5,586 488,416 427,419 Total construction (excluding Construction - other) 608,349 545,740 30,840 39,697 36,175 45,652 675,364 631,089 $ 9,112,884 $ 8,924,922 $ 272,555 $ 295,046 $ 334,424 $ 333,843 $ 9,719,863 $ 9,553,811 % of Total 93.8 % 93.4 % 2.8 % 3.1 % 3.4 % 3.5 % 100.0 % 100.0 % The following is a summary of the Corporation's internal risk rating categories: • Pass : These loans do not currently pose undue credit risk and can range from the highest to average quality, depending on the degree of potential risk. • Special Mention : These loans constitute an undue and unwarranted credit risk, but not to a point of justifying a classification of substandard. Loans in this category are currently acceptable, but are nevertheless potentially weak. • Substandard or Lower : These loans are inadequately protected by current sound worth and paying capacity of the borrower. There exists a well-defined weakness or weaknesses that jeopardize the normal repayment of the debt. The risk rating process allows management to identify riskier credits in a timely manner and to allocate resources to managing troubled accounts. The Corporation believes that internal risk ratings are the most relevant credit quality indicator for the class segments presented above. The migration of loans through the various internal risk rating categories is a significant component of the allowance for credit loss methodology, which bases the probability of default on this migration. Assigning risk ratings involves judgment. Risk ratings are initially assigned to loans by loan officers and are reviewed on a regular basis by credit administration staff. The Corporation's loan review officers provide a separate assessment of risk rating accuracy. Ratings may be changed based on the ongoing monitoring procedures performed by loan officers or credit administration staff, or if specific loan review activities identify a deterioration or an improvement in the loan. The Corporation does not assign internal risk ratings to smaller balance, homogeneous loans, such as home equity, residential mortgage, consumer, lease receivables and construction loans to individuals secured by residential real estate. For these loans, the most relevant credit quality indicator is delinquency status. The migration of loans through the various delinquency status categories is a significant component of the allowance for credit losses methodology for those loans, which bases the probability of default on this migration. The following table presents a summary of delinquency and non-performing status for home equity, real estate - residential mortgages, construction loans to individuals and consumer, leasing and other loans by class segment: Performing Delinquent (1) Non-performing (2) Total June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 (dollars in thousands) Real estate - home equity $ 1,665,771 $ 1,711,017 $ 9,285 $ 10,931 $ 14,632 $ 14,740 $ 1,689,688 $ 1,736,688 Real estate - residential mortgage 1,316,650 1,321,139 20,891 26,934 31,562 28,995 1,369,103 1,377,068 Construction - other 55,864 59,180 — — 697 332 56,561 59,512 Consumer - direct 103,985 104,018 2,886 2,891 2,326 2,414 109,197 109,323 Consumer - indirect 161,201 153,358 1,839 2,574 257 176 163,297 156,108 Total consumer 265,186 257,376 4,725 5,465 2,583 2,590 272,494 265,431 Leasing and other and overdrafts 135,895 118,550 553 523 73 133 136,521 119,206 $ 3,439,366 $ 3,467,262 $ 35,454 $ 43,853 $ 49,547 $ 46,790 $ 3,524,367 $ 3,557,905 % of Total 97.6 % 97.5 % 1.0 % 1.2 % 1.4 % 1.3 % 100.0 % 100.0 % (1) Includes all accruing loans 31 days to 89 days past due. (2) Includes all accruing loans 90 days or more past due and all non-accrual loans. The following table presents non-performing assets: June 30, December 31, (in thousands) Non-accrual loans $ 129,152 $ 121,080 Accruing loans 90 days or more past due 20,353 17,402 Total non-performing loans 149,505 138,482 Other real estate owned (OREO) 12,763 12,022 Total non-performing assets $ 162,268 $ 150,504 The following table presents TDRs, by class segment: June 30, December 31, (in thousands) Real-estate - residential mortgage $ 31,584 $ 31,308 Real-estate - commercial mortgage 17,482 18,822 Commercial - secured 6,417 5,170 Construction - commercial residential 4,482 9,241 Real estate - home equity 3,299 2,975 Commercial - unsecured 174 67 Consumer - indirect 16 19 Consumer - direct 15 19 Total accruing TDRs 63,469 67,621 Non-accrual TDRs (1) 27,230 24,616 Total TDRs $ 90,699 $ 92,237 (1) Included within non-accrual loans in the preceding table detailing non-performing assets. As of June 30, 2015 and December 31, 2014 , there were $6.0 million and $3.9 million , respectively, of commitments to lend additional funds to borrowers whose loans were modified under TDRs. The following table presents TDRs, by class segment as of June 30, 2015 and 2014 that were modified during the three and six months ended June 30, 2015 and 2014 : Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 Number of Loans Recorded Investment Number of Loans Recorded Investment Number of Loans Recorded Investment Number of Loans Recorded Investment (dollars in thousands) Commercial - secured 3 $ 1,047 1 $ 143 11 $ 7,823 1 $ 143 Real estate - home equity 15 739 10 334 25 1,231 20 863 Real estate - residential mortgage 4 456 9 1,130 8 1,066 15 1,836 Real estate - commercial mortgage 1 132 2 2,334 4 2,627 9 9,804 Construction - commercial residential — — 1 1,366 1 889 2 1,914 Commercial - unsecured — — — — 1 42 — — Consumer - indirect — — 1 6 1 13 4 7 Consumer - direct — — 2 4 — — 6 8 Total 23 $ 2,374 26 $ 5,317 51 $ 13,691 57 $ 14,575 The following table presents TDRs, by class segment, as of June 30, 2015 and 2014 that were modified within the previous 12 months and had a post-modification payment default during the six months ended June 30, 2015 and 2014 . The Corporation defines a payment default as a single missed payment. 2015 2014 Number of Loans Recorded Investment Number of Loans Recorded Investment (dollars in thousands) Commercial - secured 8 $ 4,779 1 $ 10 Real estate - residential mortgage 6 652 9 1,204 Real estate - home equity 7 614 9 777 Real estate - commercial mortgage 2 191 2 35 Construction - commercial residential — — 1 619 Total 23 $ 6,236 22 $ 2,645 The following table presents past due status and non-accrual loans by portfolio segment and class segment: June 30, 2015 31-59 Days Past Due 60-89 Days Past Due ≥ 90 Days Past Due and Accruing Non- accrual Total ≥ 90 Days Total Past Due Current Total (in thousands) Real estate - commercial mortgage $ 16,139 $ 1,848 $ 1,947 $ 47,985 $ 49,932 $ 67,919 $ 5,169,881 $ 5,237,800 Commercial - secured 6,489 1,463 730 32,379 33,109 41,061 3,612,599 3,653,660 Commercial - unsecured 307 80 — 2,730 2,730 3,117 149,922 153,039 Total commercial - industrial, financial and agricultural 6,796 1,543 730 35,109 35,839 44,178 3,762,521 3,806,699 Real estate - home equity 7,161 2,124 4,653 9,979 14,632 23,917 1,665,771 1,689,688 Real estate - residential mortgage 16,835 4,056 9,951 21,611 31,562 52,453 1,316,650 1,369,103 Construction - commercial residential 151 — — 11,689 11,689 11,840 175,108 186,948 Construction - commercial — — — 2,498 2,498 2,498 485,918 488,416 Construction - other — — 416 281 697 697 55,864 56,561 Total real estate - construction 151 — 416 14,468 14,884 15,035 716,890 731,925 Consumer - direct 2,159 727 2,326 — 2,326 5,212 103,985 109,197 Consumer - indirect 1,719 120 257 — 257 2,096 161,201 163,297 Total consumer 3,878 847 2,583 — 2,583 7,308 265,186 272,494 Leasing and other and overdrafts 468 85 73 — 73 626 135,895 136,521 Total $ 51,428 $ 10,503 $ 20,353 $ 129,152 $ 149,505 $ 211,436 $ 13,032,794 $ 13,244,230 December 31, 2014 31-59 Days Past Due 60-89 Days Past Due ≥ 90 Days Past Due and Accruing Non- accrual Total ≥ 90 Days Total Past Due Current Total (in thousands) Real estate - commercial mortgage $ 14,399 $ 3,677 $ 800 $ 44,437 $ 45,237 $ 63,313 $ 5,133,842 $ 5,197,155 Commercial - secured 4,839 958 610 28,747 29,357 35,154 3,529,460 3,564,614 Commercial - unsecured 395 65 9 1,022 1,031 1,491 159,462 160,953 Total commercial - industrial, financial and agricultural 5,234 1,023 619 29,769 30,388 36,645 3,688,922 3,725,567 Real estate - home equity 8,048 2,883 4,257 10,483 14,740 25,671 1,711,017 1,736,688 Real estate - residential mortgage 18,789 8,145 8,952 20,043 28,995 55,929 1,321,139 1,377,068 Construction - commercial residential 160 — — 13,463 13,463 13,623 190,047 203,670 Construction - commercial — — — 2,604 2,604 2,604 424,815 427,419 Construction - other — — 51 281 332 332 59,180 59,512 Total real estate - construction 160 — 51 16,348 16,399 16,559 674,042 690,601 Consumer - direct 2,034 857 2,414 — 2,414 5,305 104,018 109,323 Consumer - indirect 2,156 418 176 — 176 2,750 153,358 156,108 Total consumer 4,190 1,275 2,590 — 2,590 8,055 257,376 265,431 Leasing and other and overdrafts 357 166 133 — 133 656 118,550 119,206 Total $ 51,177 $ 17,169 $ 17,402 $ 121,080 $ 138,482 $ 206,828 $ 12,904,888 $ 13,111,716

Mortgage Servicing Rights

Mortgage Servicing Rights	6 Months Ended
	Jun. 30, 2015
Transfers and Servicing [Abstract]
Mortgage Servicing Rights	Mortgage Servicing Rights The following table summarizes the changes in mortgage servicing rights ("MSRs"), which are included in other assets on the consolidated balance sheets: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Amortized cost: Balance at beginning of period $ 41,803 $ 41,668 $ 42,148 $ 42,452 Originations of mortgage servicing rights 1,956 1,236 3,513 2,351 Amortization (2,161 ) (318 ) (4,063 ) (2,217 ) Balance at end of period $ 41,598 $ 42,586 $ 41,598 $ 42,586 MSRs represent the economic value of existing contractual rights to service mortgage loans that have been sold. Accordingly, actual and expected prepayments of the underlying mortgage loans can impact the value of MSRs. The Corporation estimates the fair value of its MSRs by discounting the estimated cash flows from servicing income, net of expense, over the expected life of the underlying loans at a discount rate commensurate with the risk associated with these assets. Expected life is based on the contractual terms of the loans, as adjusted for prepayment projections. No valuation allowance was necessary as of June 30, 2015 or 2014. The Corporation accounts for MSRs at the lower of amortized cost or fair value. As of June 30, 2015 , the estimated fair value of MSRs was $45.7 million , which exceeded their book value.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Corporation grants equity awards to employees, consisting of stock options, restricted stock, RSUs and PSUs under its Amended and Restated Equity and Cash Incentive Compensation Plan ("Employee Equity Plan"). In addition, employees may purchase stock under the Corporation’s Employee Stock Purchase Plan. The fair value of equity awards granted to employees is recognized as compensation expense over the period during which employees are required to provide service in exchange for such awards. Compensation expense for PSUs is also recognized over the period during which employees are required to provide service in exchange for such awards, however, compensation expense may vary based on the expectations for actual performance relative to defined performance measures. The Corporation also grants equity awards to non-employee members of its board of directors under the 2011 Directors’ Equity Participation Plan ("Directors’ Plan"). Under the Directors’ Plan, the Corporation can grant equity awards to non-employee holding company and subsidiary bank directors in the form of stock options, restricted stock or common stock. Equity awards issued under the Employee Equity Plan are generally granted annually and become fully vested over or after a three -year vesting period. The vesting period for non-performance based awards represents the period during which employees are required to provide service in exchange for such awards. Equity awards under the Directors' Plan generally vest immediately upon grant. Certain events, as defined in the Employee Equity Plan and the Directors' Plan, result in the acceleration of the vesting of equity awards. The following table presents compensation expense and the related tax benefits for equity awards recognized in the consolidated statements of income: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Stock-based compensation expense $ 1,767 $ 1,989 $ 2,838 $ 3,022 Tax benefit (622 ) (446 ) (914 ) (709 ) Stock-based compensation expense, net of tax $ 1,145 $ 1,543 $ 1,924 $ 2,313 Stock option fair values are estimated through the use of the Black-Scholes valuation methodology as of the date of grant. Stock options carry terms of up to ten years. Fair values for restricted stock, RSUs and a majority of PSUs are based on the trading price of the Corporation’s stock on the date of grant and earn dividends during the vesting period, which are forfeitable if the awards do not vest. The fair value of certain PSUs are estimated through the use of the Monte Carlo valuation methodology as of the date of grant. As of June 30, 2015 , the Employee Equity Plan had 11.6 million shares reserved for future grants through 2023 and the Directors’ Plan had approximately 396,000 shares reserved for future grants through 2021 . On April 1, 2015, the Corporation granted approximately 403,000 PSUs and 139,500 RSUs under its Employee Equity Plan.

Employee Benefit Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Corporation maintains a defined benefit pension plan ("Pension Plan") for certain employees, which was curtailed effective January 1, 2008 . Contributions to the Pension Plan are actuarially determined and funded annually, if required. Pension Plan assets are invested in: money markets; fixed income securities, including corporate bonds, U.S. Treasury securities and common trust funds; and equity securities, including common stocks and common stock mutual funds. The net periodic benefit cost for the Corporation’s Pension Plan consisted of the following components: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Service cost (1) $ 145 $ 92 $ 290 $ 184 Interest cost 851 853 1,702 1,706 Expected return on plan assets (752 ) (810 ) (1,504 ) (1,621 ) Net amortization and deferral 782 244 1,564 488 Net periodic benefit cost $ 1,026 $ 379 $ 2,052 $ 757 (1) The Pension Plan service cost recorded for the six months ended June 30, 2015 and 2014 was related to administrative costs associated with the plan and was not due to the accrual of additional participant benefits. The Corporation currently provides medical and life insurance benefits under a postretirement benefits plan ("Postretirement Plan") to certain retired full-time employees who were employees of the Corporation prior to January 1, 1998 . Effective February 1, 2014, the Corporation amended the Postretirement Plan, making all active full-time employees ineligible for benefits under this plan. As a result of this amendment, the Corporation recorded a $1.5 million gain during the six months ended June 30, 2014, as a reduction to salaries and employee benefits on the consolidated statements of income. The gain resulted from the recognition of the remaining prior service cost prior to the amendment date as of December 31, 2013. In addition, this amendment resulted in a $3.4 million decrease in the accumulated postretirement benefit obligation and a corresponding increase in unrecognized prior service cost credits. The net periodic cost (benefit) of the Corporation’s Postretirement Plan consisted of the following components, excluding the $1.5 million plan amendment gain in 2014: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Service cost (1) $ — $ — $ — $ 15 Interest cost 52 48 104 109 Net accretion and deferral (65 ) (84 ) (130 ) (179 ) Net periodic benefit $ (13 ) $ (36 ) $ (26 ) $ (55 ) (1) As a result of the plan amendment, additional participant benefits are not accrued under the Postretirement Plan after February 1, 2014. The Corporation recognizes the funded status of its Pension Plan and Postretirement Plan on the consolidated balance sheets and recognizes the change in that funded status through other comprehensive income.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Corporation manages its exposure to certain interest rate and foreign currency risks through the use of derivatives. None of the Corporation's outstanding derivative contracts are designated as hedges and none are entered into for speculative purposes. Derivative instruments are carried at fair value, with changes in fair values recognized in earnings as components of non-interest income and non-interest expense on the consolidated statements of income. Derivative contracts create counterparty credit risk with both the Corporation's customers and with institutional derivative counterparties. The Corporation manages counterparty credit risk through its credit approval processes, monitoring procedures and obtaining adequate collateral, when the Corporation determines it is appropriate to do so and in accordance with counterparty contracts. Mortgage Banking Derivatives In connection with its mortgage banking activities, the Corporation enters into commitments to originate certain fixed rate residential mortgage loans for customers, also referred to as interest rate locks. In addition, the Corporation enters into forward commitments for the future sales or purchases of mortgage-backed securities to or from third-party counterparties to hedge the effect of changes in interest rates on the values of both the interest rate locks and mortgage loans held for sale. Forward sales commitments may also be in the form of commitments to sell individual mortgage loans at a fixed price at a future date. The amount necessary to settle each interest rate lock is based on the price that secondary market investors would pay for loans with similar characteristics, including interest rate and term, as of the date fair value is measured. Gross derivative assets and liabilities are recorded within other assets and other liabilities, respectively, on the consolidated balance sheets, with changes in fair values during the period recorded within mortgage banking income on the consolidated statements of income. Interest Rate Swaps The Corporation enters into interest rate swaps with certain qualifying commercial loan customers to meet their interest rate risk management needs. The Corporation simultaneously enters into interest rate swaps with dealer counterparties, with identical notional amounts and terms. The net result of these interest rate swaps is that the customer pays a fixed rate of interest and the Corporation receives a floating rate. These interest rate swaps are derivative financial instruments that are recorded at their fair value within other assets and other liabilities on the consolidated balance sheets. Changes in fair value during the period are recorded within other non-interest expense on the consolidated statements of income. Foreign Exchange Contracts The Corporation enters into foreign exchange contracts to accommodate the needs of its customers. Foreign exchange contracts are commitments to buy or sell foreign currency on a future date at a contractual price. The Corporation offsets its foreign exchange contract exposure with customers by entering into contracts with third-party correspondent financial institutions to mitigate its exposure to fluctuations in foreign currency exchange rates. The Corporation also holds certain amounts of foreign currency with international correspondent banks. The Corporation's policy limits the total net foreign currency open positions, which includes all outstanding contracts and foreign account balances, to $500,000 . Gross derivative assets and liabilities are recorded within other assets and other liabilities, respectively, on the consolidated balance sheets, with changes in fair values during the period recorded within other service charges and fees on the consolidated statements of income. The following table presents a summary of the notional amounts and fair values of derivative financial instruments: June 30, 2015 December 31, 2014 Notional Asset Notional Asset (in thousands) Interest Rate Locks with Customers Positive fair values $ 126,063 $ 1,268 $ 89,655 $ 1,391 Negative fair values 2,240 (48 ) 301 (6 ) Net interest rate locks with customers 1,220 1,385 Forward Commitments Positive fair values 111,387 1,705 — — Negative fair values 27,107 (24 ) 93,802 (1,164 ) Net forward commitments 1,681 (1,164 ) Interest Rate Swaps with Customers Positive fair values 558,750 19,317 468,080 19,716 Negative fair values 46,937 (234 ) 25,418 (198 ) Net interest rate swaps with customers 19,083 19,518 Interest Rate Swaps with Dealer Counterparties Positive fair values 46,937 234 25,418 198 Negative fair values 558,750 (19,317 ) 468,080 (19,716 ) Net interest rate swaps with dealer counterparties (19,083 ) (19,518 ) Foreign Exchange Contracts with Customers Positive fair values 8,200 572 11,616 810 Negative fair values 7,128 (384 ) 5,250 (441 ) Net foreign exchange contracts with customers 188 369 Foreign Exchange Contracts with Correspondent Banks Positive fair values 9,296 629 5,287 446 Negative fair values 9,824 (672 ) 13,572 (876 ) Net foreign exchange contracts with correspondent banks (43 ) (430 ) Net derivative fair value asset $ 3,046 $ 160 The following table presents a summary of the fair value gains and losses on derivative financial instruments: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Interest rate locks with customers $ (1,287 ) $ 1,203 $ (165 ) $ 1,592 Forward commitments 2,291 (1,503 ) 2,845 (3,001 ) Interest rate swaps with customers (9,839 ) 6,135 (435 ) 10,340 Interest rate swaps with dealer counterparties 9,839 (6,135 ) 435 (10,340 ) Foreign exchange contracts with customers (748 ) 105 (181 ) 297 Foreign exchange contracts with correspondent banks 711 (98 ) 387 (366 ) Net fair value gains (losses) on derivative financial instruments $ 967 $ (293 ) $ 2,886 $ (1,478 )

Fair Value Option

Fair Value Option	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Option	Fair Value Option U.S. GAAP permits entities to measure many financial instruments and certain other items at fair value and requires certain disclosures for amounts for which the fair value option is applied. The Corporation has elected to measure mortgage loans held for sale at fair value to more accurately reflect the financial results of its mortgage banking activities in its consolidated financial statements. Derivative financial instruments related to these activities are also recorded at fair value, as noted within Note 9, "Derivative Financial Instruments." The Corporation determines fair value for its mortgage loans held for sale based on the price that secondary market investors would pay for loans with similar characteristics, including interest rate and term, as of the date fair value is measured. Changes in fair values during the period are recorded as components of mortgage banking income on the consolidated statements of income. Interest income earned on mortgage loans held for sale is classified within interest income on the consolidated statements of income. The following table presents a summary of the Corporation’s mortgage loans held for sale: June 30, December 31, (in thousands) Cost $ 33,760 $ 17,080 Fair value 33,980 17,522 During the three and six months ended June 30, 2015 , the Corporation recorded losses related to changes in fair values of mortgage loans held for sale of $483,000 and $222,000 , respectively. During the three and six months ended June 30, 2014 , the Corporation recorded gains related to changes in fair values of mortgage loans held for sale of $518,000 and $815,000 , respectively.

Balance Sheet Offsetting

Balance Sheet Offsetting	6 Months Ended
	Jun. 30, 2015
Offsetting [Abstract]
Balance Sheet Offsetting	Balance Sheet Offsetting Certain financial assets and liabilities may be eligible for offset on the consolidated balance sheets as they are subject to master netting arrangements or similar agreements. The Corporation elects to not offset assets and liabilities subject to such arrangements on the consolidated financial statements. The Corporation is a party to interest rate swap transactions with financial institution counterparties and customers, disclosed in detail within Note 9, "Derivative Financial Instruments." Under these agreements, the Corporation has the right to net settle multiple contracts with the same counterparty in the event of default on, or termination of, any one contract. Cash collateral is posted by the party with a net liability position in accordance with contract thresholds and can be used to settle the fair value of the interest rate swap agreements in the event of default. The Corporation is also a party to foreign currency exchange contracts with financial institution counterparties, under which the Corporation has the right to net settle multiple contracts with the same counterparty in the event of default on, or termination of, any one contract. As with interest rate swap contracts, cash collateral is posted by the party with a net liability position in accordance with contract thresholds and can be used to settle the fair value of the foreign currency exchange contracts in the event of default. For additional details, see Note 9, "Derivative Financial Instruments." The Corporation also enters into agreements with customers in which it sells securities subject to an obligation to repurchase the same or similar securities, referred to as repurchase agreements. Under these agreements, the Corporation may transfer legal control over the assets but still maintain effective control through agreements that both entitle and obligate the Corporation to repurchase the assets. Therefore, repurchase agreements are reported as secured borrowings, classified within short-term borrowings on the consolidated balance sheets, while the securities underlying the repurchase agreements remain classified with investment securities on the consolidated balance sheets. The Corporation has no intention of setting off these amounts, therefore, these repurchase agreements are not eligible for offset. The following table presents the Corporation's financial instruments that are eligible for offset, and the effects of offsetting, on the consolidated balance sheets: Gross Amounts Gross Amounts Not Offset Recognized on the Consolidated on the Balance Sheets Consolidated Financial Cash Net Balance Sheets Instruments (1) Collateral (2) Amount (in thousands) June 30, 2015 Interest rate swap derivative assets $ 19,551 $ (235 ) $ — $ 19,316 Foreign exchange derivative assets with correspondent banks 629 (629 ) — — Total $ 20,180 $ (864 ) $ — $ 19,316 Interest rate swap derivative liabilities $ 19,551 $ (235 ) $ (19,290 ) $ 26 Foreign exchange derivative liabilities with correspondent banks 672 (629 ) — 43 Total $ 20,223 $ (864 ) $ (19,290 ) $ 69 December 31, 2014 Interest rate swap derivative assets $ 19,914 $ (206 ) $ — $ 19,708 Foreign exchange derivative assets with correspondent banks 446 (446 ) — — Total $ 20,360 $ (652 ) $ — $ 19,708 Interest rate swap derivative liabilities $ 19,914 $ (206 ) $ (19,210 ) $ 498 Foreign exchange derivative liabilities with correspondent banks 876 (446 ) (310 ) 120 Total $ 20,790 $ (652 ) $ (19,520 ) $ 618 (1) For interest rate swap and foreign exchange derivative assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default. For interest rate swap and foreign exchange derivative liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default. (2) Amounts represent cash collateral posted on interest rate swap transactions with financial institution counterparties. Interest rate swaps with customers are collateralized by the underlying loans to those borrowers.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Commitments The Corporation is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. Those financial instruments include commitments to extend credit and letters of credit, which involve, to varying degrees, elements of credit risk and interest rate risk in excess of the amounts recognized on the Corporation’s consolidated balance sheets. Exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and letters of credit is represented by the outstanding amount of those instruments. The outstanding amounts of commitments to extend credit and letters of credit were as follows: June 30, December 31, 2014 (in thousands) Commitments to extend credit $ 5,071,983 $ 4,389,064 Standby letters of credit 387,996 382,465 Commercial letters of credit 35,769 32,304 The Corporation records a reserve for unfunded lending commitments, which represents management’s estimate of losses associated with unused commitments to extend credit. See Note 5, "Loans and Allowance for Credit Losses," for additional details. Residential Lending Residential mortgages originated and sold by the Corporation consist primarily of conforming, prime loans sold to government sponsored agencies, such as the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Mortgage Corporation ("Freddie Mac"). The Corporation also sells a portion of prime loans to non-government sponsored agency investors. The Corporation provides customary representations and warranties to investors that specify, among other things, that the loans have been underwritten to the standards established by the investor. The Corporation may be required to repurchase a loan, or reimburse the investor for a credit loss incurred on a loan, if it is determined that the representations and warranties have not been met. Such repurchases or reimbursements generally result from an underwriting or documentation deficiency. As of June 30, 2015 and December 31, 2014 , total outstanding repurchase requests were $918,000 and $543,000 , respectively. From 2000 to 2011 , the Corporation sold loans to the Federal Home Loan Bank of Pittsburgh under its Mortgage Partnership Finance Program ("MPF Program"). No loans were sold under this program during the six months ended June 30, 2015 or 2014. The Corporation provided a "credit enhancement" for residential mortgage loans sold under the MPF Program whereby it would assume credit losses in excess of a defined "First Loss Account," or "FLA" balance, up to specified amounts. The FLA is funded by the Federal Home Loan Bank of Pittsburgh based on a percentage of the outstanding principal balance of loans sold. As of June 30, 2015 , the unpaid principal balance of loans sold under the MPF Program was approximately $140 million . As of June 30, 2015 and December 31, 2014 , the reserve for estimated credit losses related to loans sold under the MPF Program was $2.1 million and $2.3 million , respectively. Required reserves are calculated based on delinquency status and estimated loss rates established through the Corporation's existing allowance for credit losses methodology for residential mortgage loans. As of June 30, 2015 and December 31, 2014 , the total reserve for losses on residential mortgage loans sold was $2.9 million and $3.2 million , respectively, including both reserves for credit losses under the MPF Program and reserves for representation and warranty exposures. Management believes that the reserves recorded as of June 30, 2015 are adequate. However, declines in collateral values, the identification of additional loans to be repurchased, or a deterioration in the credit quality of loans sold under the MPF Program could necessitate additional reserves, established through charges to earnings, in the future. Other Contingencies The Corporation and its subsidiaries are involved in various legal proceedings in the ordinary course of business of the Corporation. The Corporation periodically evaluates the possible impact of pending litigation matters based on, among other factors, the advice of counsel, available insurance coverage and recorded liabilities and reserves for probable legal liabilities and costs. In addition, from time to time, the Corporation is the subject of investigations or other forms of regulatory or governmental inquiry covering a range of possible issues and, in some cases, these may be part of similar reviews of the specified activities of other industry participants. These inquiries could lead to administrative, civil or criminal proceedings, and could possibly result in fines, penalties, restitution or the need to alter the Corporation’s business practices, and cause the Corporation to incur additional costs. The Corporation’s practice is to cooperate fully with regulatory and governmental investigations. Refer also to Part II. Other Information, Item 1. Legal Proceedings.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements FASB ASC Topic 820 establishes a fair value hierarchy for the inputs to valuation techniques used to measure assets and liabilities at fair value using the following three categories (from highest to lowest priority): • Level 1 – Inputs that represent quoted prices for identical instruments in active markets. • Level 2 – Inputs that represent quoted prices for similar instruments in active markets, or quoted prices for identical instruments in non-active markets. Also includes valuation techniques whose inputs are derived principally from observable market data other than quoted prices, such as interest rates or other market-corroborated means. • Level 3 – Inputs that are largely unobservable, as little or no market data exists for the instrument being valued. The Corporation has categorized all assets and liabilities measured at fair value on both a recurring and nonrecurring basis into the above three levels. The following tables present summaries of the Corporation’s assets and liabilities measured at fair value on a recurring basis and reported on the consolidated balance sheets: June 30, 2015 Level 1 Level 2 Level 3 Total (in thousands) Mortgage loans held for sale $ — $ 33,980 $ — $ 33,980 Available for sale investment securities: Equity securities 33,041 — — 33,041 U.S. Government sponsored agency securities — 48,260 — 48,260 State and municipal securities — 236,517 — 236,517 Corporate debt securities — 92,822 4,350 97,172 Collateralized mortgage obligations — 918,232 — 918,232 Mortgage-backed securities — 1,008,664 — 1,008,664 Auction rate securities — — 98,606 98,606 Total available for sale investments 33,041 2,304,495 102,956 2,440,492 Other assets 18,002 22,524 — 40,526 Total assets $ 51,043 $ 2,360,999 $ 102,956 $ 2,514,998 Other liabilities $ 17,848 $ 19,622 $ — $ 37,470 December 31, 2014 Level 1 Level 2 Level 3 Total (in thousands) Mortgage loans held for sale $ — $ 17,522 $ — $ 17,522 Available for sale investment securities: Equity securities 47,623 — — 47,623 U.S. Government securities — 200 — 200 U.S. Government sponsored agency securities — 214 — 214 State and municipal securities — 245,215 — 245,215 Corporate debt securities — 90,126 7,908 98,034 Collateralized mortgage obligations — 902,313 — 902,313 Mortgage-backed securities — 928,831 — 928,831 Auction rate securities — — 100,941 100,941 Total available for sale investments 47,623 2,166,899 108,849 2,323,371 Other assets 17,682 21,305 — 38,987 Total assets $ 65,305 $ 2,205,726 $ 108,849 $ 2,379,880 Other liabilities $ 17,737 $ 21,084 $ — $ 38,821 The valuation techniques used to measure fair value for the items in the preceding tables are as follows: • Mortgage loans held for sale – This category consists of mortgage loans held for sale that the Corporation has elected to measure at fair value. Fair values as of June 30, 2015 and December 31, 2014 were measured based on the price that secondary market investors were offering for loans with similar characteristics. See Note 10, "Fair Value Option" for details related to the Corporation’s election to measure assets and liabilities at fair value. • Available for sale investment securities – Included within this asset category are both equity and debt securities. Level 2 available for sale debt securities are valued by a third-party pricing service commonly used in the banking industry. The pricing service uses pricing models that vary based on asset class and incorporate available market information, including quoted prices of investment securities with similar characteristics. Because many fixed income securities do not trade on a daily basis, pricing models use available information, as applicable, through processes such as benchmark yield curves, benchmarking of like securities, sector groupings, and matrix pricing. Standard market inputs include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data, including market research publications. For certain security types, additional inputs may be used, or some of the standard market inputs may not be applicable. Management tests the values provided by the pricing service by obtaining securities prices from an alternative third-party source and comparing the results. This test is done for approximately 80% of the securities valued by the pricing service. Generally, differences by security in excess of 5% are researched to reconcile the difference. • Equity securities – Equity securities consist of common stocks of financial institutions ( $27.2 million at June 30, 2015 and $41.8 million at December 31, 2014 ) and other equity investments ( $5.8 million at both June 30, 2015 and December 31, 2014 ). These Level 1 investments are measured at fair value based on quoted prices for identical securities in active markets. • U.S. Government securities/U.S. Government sponsored agency securities/State and municipal securities/Collateralized mortgage obligations/Mortgage-backed securities – These debt securities are classified as Level 2 investments. Fair values are determined by a third-party pricing service, as detailed above. • Corporate debt securities – This category consists of subordinated debt issued by financial institutions ( $49.7 million at June 30, 2015 and $50.0 million at December 31, 2014 ), single-issuer trust preferred securities issued by financial institutions ( $43.4 million at June 30, 2015 and $42.0 million at December 31, 2014 ), pooled trust preferred securities issued by financial institutions ( $530,000 at June 30, 2015 and $4.1 million at December 31, 2014 ) and other corporate debt issued by non-financial institutions ( $3.5 million at June 30, 2015 and $1.9 million at December 31, 2014 ). Level 2 investments include the Corporation’s holdings of subordinated debt, other corporate debt issued by non-financial institutions and $39.6 million and $38.2 million of single-issuer trust preferred securities held at June 30, 2015 and December 31, 2014 , respectively. The fair values for these corporate debt securities are determined by a third-party pricing service, as detailed above. Level 3 investments include the Corporation’s investments in pooled trust preferred securities and certain single-issuer trust preferred securities ( $3.8 million at June 30, 2015 and December 31, 2014 ). The fair values of these securities were determined based on quotes provided by third-party brokers who determined fair values based predominantly on internal valuation models which were not indicative prices or binding offers. The Corporation’s third-party pricing service cannot derive fair values for these securities primarily due to inactive markets for similar investments. Level 3 values are tested by management primarily through trend analysis, by comparing current values to those reported at the end of the preceding calendar quarter, and determining if they are reasonable based on price and spread movements for this asset class. • Auction rate securities – Due to their illiquidity, ARCs are classified as Level 3 investments and are valued through the use of an expected cash flows model prepared by a third-party valuation expert. The assumptions used in preparing the expected cash flows model include estimates for coupon rates, time to maturity and market rates of return. The most significant unobservable input to the expected cash flows model is an assumed return to market liquidity sometime within the next five years. If the assumed return to market liquidity was lengthened beyond the next five years, this would result in a decrease in the fair value of these ARCs. The Corporation believes that the trusts underlying the ARCs will self-liquidate as student loans are repaid. Level 3 values are tested by management through the performance of a trend analysis of the market price and discount rate. Changes in the price and discount rates are compared to changes in market data, including bond ratings, parity ratios, balances and delinquency levels. Other assets – Included within this category are the following: • Level 1 assets include mutual funds that are held in trust for employee deferred compensation plans ( $16.8 million at June 30, 2015 and $16.4 million at December 31, 2014 ) and the fair value of foreign currency exchange contracts ( $1.2 million at June 30, 2015 and $1.3 million at December 31, 2014 ). The mutual funds and foreign exchange prices used to measure these items at fair value are based on quoted prices for identical instruments in active markets. • Level 2 assets include the fair value of mortgage banking derivatives in the form of interest rate locks and forward commitments with secondary market investors ( $3.0 million at June 30, 2015 and $1.4 million at December 31, 2014 ) and the fair value of interest rate swaps ( $19.6 million at June 30, 2015 and $19.9 million at December 31, 2014 ). The fair values of the Corporation’s interest rate locks, forward commitments and interest rate swaps represent the amounts that would be required to settle the derivative financial instruments at the balance sheet date. See Note 9, "Derivative Financial Instruments," for additional information. • Other liabilities – Included within this category are the following: • Level 1 liabilities include employee deferred compensation liabilities which represent amounts due to employees under deferred compensation plans ( $16.8 million at June 30, 2015 and $16.4 million at December 31, 2014 ) and the fair value of foreign currency exchange contracts ( $1.0 million at June 30, 2015 and $1.3 million at December 31, 2014 ). The fair value of these liabilities are determined in the same manner as the related assets, as described under the heading "Other assets" above. • Level 2 liabilities include the fair value of mortgage banking derivatives in the form of interest rate locks and forward commitments with secondary market investors ( $72,000 at June 30, 2015 and $1.2 million at December 31, 2014 ) and the fair value of interest rate swaps ( $19.6 million at June 30, 2015 and $19.9 million at December 31, 2014 ). The fair values of these liabilities are determined in the same manner as the related assets, as described under the heading "Other assets" above. The following table presents the changes in the Corporation’s available for sale investment securities measured at fair value on a recurring basis using unobservable inputs (Level 3): Three months ended June 30, 2015 Pooled Trust Single-issuer ARCs (in thousands) Balance at March 31, 2015 $ 1,084 $ 3,820 $ 98,932 Sales (554 ) — — Unrealized adjustment to fair value (1) — (2 ) (420 ) Discount accretion (2) — 2 94 Balance at June 30, 2015 $ 530 $ 3,820 $ 98,606 Three months ended June 30, 2014 Balance at March 31, 2014 $ 5,659 $ 3,820 $ 147,713 Sales (1,394 ) — — Unrealized adjustment to fair value (1) 38 (2 ) 124 Settlements - calls (28 ) — (1,081 ) Discount accretion (2) — 2 175 Balance at June 30, 2014 $ 4,275 $ 3,820 $ 146,931 Six months ended June 30, 2015 Pooled Trust Single-issuer ARCs (in thousands) Balance at December 31, 2014 $ 4,088 $ 3,820 $ 100,941 Sales (3,633 ) — — Unrealized adjustment to fair value (2) 190 (4 ) (88 ) Settlements - calls (117 ) — (2,446 ) Discount accretion (3) 2 4 199 Balance at June 30, 2015 $ 530 $ 3,820 $ 98,606 Six months ended June 30, 2014 Balance at December 31, 2013 $ 5,306 $ 3,781 $ 159,274 Sales (1,394 ) — (11,912 ) Unrealized adjustment to fair value (2) 559 36 248 Settlements - calls (200 ) — (1,081 ) Discount accretion (3) 4 3 402 Balance at June 30, 2014 $ 4,275 $ 3,820 $ 146,931 (1) Pooled trust preferred securities, single-issuer trust preferred securities and ARCs are classified as available for sale investment securities; as such, the unrealized adjustment to fair value was recorded as an unrealized holding gain (loss) and included as a component of available for sale investment securities on the consolidated balance sheets. (2) Included as a component of net interest income on the consolidated statements of income. Certain financial assets are not measured at fair value on an ongoing basis, but are subject to fair value measurement in certain circumstances, such as upon their acquisition or when there is evidence of impairment. The following table presents the Corporation’s financial assets measured at fair value on a nonrecurring basis and reported on the Corporation’s consolidated balance sheets: June 30, 2015 Level 1 Level 2 Level 3 Total (in thousands) Net loans $ — $ — $ 145,058 $ 145,058 Other financial assets — — 54,361 54,361 Total assets $ — $ — $ 199,419 $ 199,419 December 31, 2014 Level 1 Level 2 Level 3 Total (in thousands) Net loans $ — $ — $ 127,834 $ 127,834 Other financial assets — — 54,170 54,170 Total assets $ — $ — $ 182,004 $ 182,004 The valuation techniques used to measure fair value for the items in the table above are as follows: • Net loans – This category consists of loans that were evaluated for impairment under FASB ASC Section 310-10-35 and have been classified as Level 3 assets. The amount shown is the balance of impaired loans, net of the related allowance for loan losses. See Note 5, "Loans and Allowance for Credit Losses," for additional details. • Other financial assets – This category includes OREO ( $12.8 million at June 30, 2015 and $12.0 million at December 31, 2014 ) and MSRs ( $41.6 million at June 30, 2015 and $42.1 million at December 31, 2014 ), both classified as Level 3 assets. Fair values for OREO were based on estimated selling prices less estimated selling costs for similar assets in active markets. MSRs are initially recorded at fair value upon the sale of residential mortgage loans to secondary market investors. MSRs are amortized as a reduction to servicing income over the estimated lives of the underlying loans. MSRs are stratified and evaluated for impairment by comparing each stratum's carrying amount to its estimated fair value. Fair values are determined at the end of each quarter through a discounted cash flows valuation performed by a third-party valuation expert. Significant inputs to the valuation included expected net servicing income, the discount rate and the expected life of the underlying loans. Expected life is based on the contractual terms of the loans, as adjusted for prepayment projections. The weighted average annual constant prepayment rate and the weighted average discount rate used in the June 30, 2015 valuation were 11.3% and 9.6% , respectively. Management tests the reasonableness of the significant inputs to the third-party valuation in comparison to market data. As required by FASB ASC Section 825-10-50, the following table details the book values and estimated fair values of the Corporation’s financial instruments as of June 30, 2015 and December 31, 2014 . In addition, a general description of the methods and assumptions used to estimate such fair values is also provided. June 30, 2015 December 31, 2014 Book Value Estimated Book Value Estimated (in thousands) FINANCIAL ASSETS Cash and due from banks $ 100,455 $ 100,455 $ 105,702 $ 105,702 Interest-bearing deposits with other banks 322,218 322,218 358,130 358,130 Federal Reserve Bank and Federal Home Loan Bank stock 65,106 65,106 64,953 64,953 Loans held for sale (1) 33,980 33,980 17,522 17,522 Available for sale investment securities (1) 2,440,492 2,440,492 2,323,371 2,323,371 Loans, net of unearned income (1) 13,244,230 13,129,521 13,111,716 13,030,543 Accrued interest receivable 41,193 41,193 41,818 41,818 Other financial assets (1) 157,792 157,792 169,764 169,764 FINANCIAL LIABILITIES Demand and savings deposits $ 10,501,956 $ 10,501,956 $ 10,296,055 $ 10,296,055 Time deposits 3,003,753 2,999,352 3,071,451 3,069,883 Short-term borrowings 409,035 409,035 329,719 329,719 Accrued interest payable 15,172 15,172 18,045 18,045 Other financial liabilities (1) 175,220 175,220 172,786 172,786 Federal Home Loan Bank advances and long-term debt 1,132,641 1,152,810 1,139,413 1,142,980 (1) These financial instruments, or certain financial instruments within these categories, are measured at fair value on the Corporation’s consolidated balance sheets. Descriptions of the fair value determinations for these financial instruments are disclosed above. Fair values of financial instruments are significantly affected by the assumptions used, principally the timing of future cash flows and discount rates. Because assumptions are inherently subjective in nature, the estimated fair values cannot be substantiated by comparison to independent market quotes and, in many cases, the estimated fair values could not necessarily be realized in an immediate sale or settlement of the instrument. The aggregate fair value amounts presented do not necessarily represent management’s estimate of the underlying value of the Corporation. For short-term financial instruments, defined as those with remaining maturities of 90 days or less, and excluding those recorded at fair value on the Corporation’s consolidated balance sheets, book value was considered to be a reasonable estimate of fair value. The following instruments are predominantly short-term: Assets Liabilities Cash and due from banks Demand and savings deposits Interest bearing deposits with other banks Short-term borrowings Accrued interest receivable Accrued interest payable Federal Reserve Bank and Federal Home Loan Bank stock represent restricted investments and are carried at cost on the consolidated balance sheets. Each of the Corporation’s subsidiary banks is a member of the Federal Home Loan Bank for the region encompassing the headquarters of the subsidiary bank. Memberships are maintained with the Atlanta, New York and Pittsburgh regional Federal Home Loan Banks (collectively referred to as the "FHLB"). Fair values for loans and time deposits were estimated by discounting future cash flows using the current rates at which similar loans would be made to borrowers and similar deposits would be issued to customers for the same remaining maturities. Fair values estimated in this manner do not fully incorporate an exit price approach to fair value, as defined in FASB ASC Topic 820. The fair values of FHLB advances and long-term debt were estimated by discounting the remaining contractual cash flows using a rate at which the Corporation could issue debt with similar remaining maturities as of the balance sheet date. These borrowings would be categorized within Level 2 liabilities under FASB ASC Topic 820.

Common Stock Repurchase Plans

Common Stock Repurchase Plans	6 Months Ended
	Jun. 30, 2015
Stockholders' Equity Note [Abstract]
Common Stock Repurchase Plan	In November 2014 , the Corporation entered into an accelerated share repurchase agreement ("ASR") with a third party to repurchase $100.0 million of shares of its common stock. Under the terms of the ASR, the Corporation paid $100.0 million to the third party in November 2014 and received an initial delivery of 6.5 million shares, representing 80% of the shares expected to be delivered under the ASR, based on the closing price for the Corporation’s shares on November 13, 2014. In April 2015, the third party delivered an additional 1.8 million shares of common stock pursuant to the terms of the ASR, thereby completing the $100.0 million ASR. The Corporation repurchased a total of 8.3 million shares of common stock under the ASR at an average price of $12.05 per share. In April 2015, the Corporation announced that its board of directors had approved a share repurchase program pursuant to which the Corporation is authorized to repurchase up to $50.0 million of its outstanding shares of common stock, or approximately 2.3% of its outstanding shares, through December 31, 2015. Repurchased shares may be added to treasury stock, at cost, and will be used for general corporate purposes. As permitted by securities laws and other legal requirements and subject to market conditions and other factors, purchases may be made from time to time in open market or privately negotiated transactions, including, without limitation, through accelerated share repurchase transactions. The share repurchase program may be discontinued at any time. Through June 30, 2015, 1.5 million shares had been repurchased under this program for a total cost of $19.0 million , or $12.36 per share.

Subsequent Event

Subsequent Event	6 Months Ended
	Jun. 30, 2015
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event In June 2015, the Corporation issued $150 million of ten -year subordinated notes, which mature on November 15, 2024 and carry a fixed rate of 4.50% and an effective rate of approximately 4.70% as a result of issuance costs. Interest is paid semi-annually in May and November. The proceeds from the issuance of the subordinated notes were used to redeem $150 million of trust preferred securities in July 2015. The redeemed securities carried a fixed interest rate of 6.29% and an effective rate of 6.52% , and had a scheduled maturity of February 1, 2036. As a result of this transaction, the Corporation recorded a $5.6 million loss on redemption, included as a component of non-interest expense, in July 2015.

Basis of Presentation Basis of

Basis of Presentation Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New Accounting Pronouncements, Policy	Recent Accounting Standards Effective January 1, 2015, the Corporation adopted the Financial Accounting Standards Board's ("FASB") Accounting Standards Codification ("ASC") Update 2014-01, "Accounting for Investments in Qualified Affordable Housing Projects." ASC Update 2014-01 provides guidance on accounting for investments made by a reporting entity in flow-through limited liability entities that manage or invest in affordable housing projects that qualify for the low income housing tax credit. The Corporation has made certain investments in partnerships that generate tax credits under various federal programs which promote investment in low and moderate income housing and local economic development. The net income tax benefit associated with these investments, which consists of the amortization of the investments net of tax benefits, and the income tax credits earned on the investments recorded in income taxes on the consolidated income statements was $2.4 million and $2.8 million for the three months ended June 30, 2015 and 2014, respectively and $4.8 million and $5.3 million for the six months ended June 30, 2015 and 2014, respectively. As of June 30, 2015 and December 31, 2014, the Corporation’s tax credit investments, included in other assets on the consolidated balance sheets, totaled $156.8 million and $155.6 million , respectively. The adoption of this ASC update did not have a material impact on the Corporation's consolidated financial statements for the three or six months ended June 30, 2015 or 2014. In February 2015, the FASB issued ASC Update 2015-02, "Consolidation: Amendments to the Consolidation Analysis." ASC Update 2015-02 changes the way reporting enterprises evaluate whether: (a) they should consolidate limited partnerships and similar entities, (b) fees paid to a decision maker or service provider are variable interests in a variable interest entity ("VIE"), and (c) variable interests in a VIE held by related parties of the reporting enterprise require the reporting enterprise to consolidate the VIE. ASC Update 2015-02 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q, and does not expect the adoption of ASC Update 2015-02 to have a material impact on its consolidated financial statements. In April 2015, the FASB issued ASC Update 2015-03, "Interest - Imputation of Interest." ASC Update 2015-03 simplifies the presentation of debt issuances costs. Debt issuance costs related to a recognized debt liability will be presented on the balance sheet as a direct deduction from the debt liability, similar to the presentation of debt discounts. Under current U.S. GAAP, debt issuance costs are reported on the balance sheet as assets. The costs will continue to be amortized to interest expense using the effective interest method. ASC Update 2015-03 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q and does not expect the adoption of ASC Update 2015-03 to have a material impact on its consolidated financial statements. In April 2015, the FASB issued ASC Update 2015-05, "Customer's Accounting for Fees Paid in a Cloud Computing Arrangement." ASC Update 2015-05 provides explicit guidance to determine when a customer's fees paid in a cloud computing arrangement is for the acquisition of software licenses, services, or both. ASC Update 2015-05 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q and does not expect the adoption of ASC Update 2015-05 to have a material impact on its consolidated financial statements.

Net Income Per Share (Tables)

Net Income Per Share (Tables)	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Reconciliation of Weighted Average Common Shares Outstanding	A reconciliation of weighted average shares outstanding used to calculate basic net income per share and diluted net income per share follows: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Weighted average shares outstanding (basic) 176,433 188,139 177,446 188,799 Impact of common stock equivalents 1,098 1,043 1,042 1,033 Weighted average shares outstanding (diluted) 177,531 189,182 178,488 189,832

Accumulated Other Comprehensi26

Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Changes in other comprehensive income [Table Text Block]	The following table presents changes in other comprehensive income: Before-Tax Amount Tax Effect Net of Tax Amount (in thousands) Three months ended June 30, 2015 Unrealized loss on securities $ (18,474 ) $ 6,466 $ (12,008 ) Reclassification adjustment for securities gains included in net income (1) (2,413 ) 844 (1,569 ) Unrealized gain on derivative financial instruments 52 (18 ) 34 Amortization of net unrecognized pension and postretirement items (2) 717 (251 ) 466 Total Other Comprehensive Loss $ (20,118 ) $ 7,041 $ (13,077 ) Three months ended June 30, 2014 Unrealized gain on securities $ 19,984 $ (6,994 ) $ 12,990 Reclassification adjustment for securities gains included in net income (1) (1,112 ) 389 (723 ) Non-credit related unrealized gains on other-than-temporarily impaired debt securities 497 (174 ) 323 Unrealized gain on derivative financial instruments 52 (18 ) 34 Amortization of net unrecognized pension and postretirement items (2) 160 (56 ) 104 Total Other Comprehensive Income $ 19,581 $ (6,853 ) $ 12,728 Six months ended June 30, 2015 Unrealized loss on securities $ (3,103 ) $ 1,087 $ (2,016 ) Reclassification adjustment for securities gains included in net income (1) (6,558 ) 2,294 (4,264 ) Non-credit related unrealized gains (losses) on other-than-temporarily impaired debt securities 192 (67 ) 125 Unrealized gain on derivative financial instruments 104 (36 ) 68 Amortization of net unrecognized pension and postretirement items (2) 1,434 (502 ) 932 Total Other Comprehensive Loss $ (7,931 ) $ 2,776 $ (5,155 ) Six months ended June 30, 2014 Unrealized gain on securities $ 41,419 $ (14,496 ) $ 26,923 Reclassification adjustment for securities gains included in net income (1) (1,112 ) 389 (723 ) Reclassification adjustment for postretirement gains included in net income (2) (1,452 ) 508 (944 ) Non-credit related unrealized gains (losses) on other-than-temporarily impaired debt securities 788 (276 ) 512 Unrealized gain on derivative financial instruments 105 (37 ) 68 Unrecognized pension and postretirement income 3,291 (1,147 ) 2,144 Amortization of net unrecognized pension and postretirement items (2) 309 (109 ) 200 Total Other Comprehensive Income $ 43,348 $ (15,168 ) $ 28,180 (1) Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included within "Investment securities gains, net" on the consolidated statements of income. See Note 4, "Investment Securities," for additional details. (2) Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included within "Salaries and employee benefits" on the consolidated statements of income. See Note 8, "Employee Benefit Plans," for additional details.
Changes in each component of accumulated other comprehensive income [Table Text Block]	The following table presents changes in each component of accumulated other comprehensive income, net of tax: Unrealized Gains (Losses) on Investment Securities Not Other-Than-Temporarily Impaired Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities Unrealized Effective Portions of Losses on Forward-Starting Interest Rate Swaps Unrecognized Pension and Postretirement Plan Income (Costs) Total (in thousands) Three months ended June 30, 2015 Balance at March 31, 2015 $ 14,311 $ 440 $ (2,512 ) $ (22,039 ) $ (9,800 ) Other comprehensive loss before reclassifications (12,008 ) — — — (12,008 ) Amounts reclassified from accumulated other comprehensive income (loss) (1,473 ) (96 ) 34 466 (1,069 ) Balance at June 30, 2015 $ 830 $ 344 $ (2,478 ) $ (21,573 ) $ (22,877 ) Three months ended June 30, 2014 Balance at March 31, 2014 $ (13,577 ) $ 1,841 $ (2,648 ) $ (7,505 ) $ (21,889 ) Other comprehensive income before reclassifications 12,990 323 — — 13,313 Amounts reclassified from accumulated other comprehensive income (loss) 7 (730 ) 34 104 (585 ) Balance at June 30, 2014 $ (580 ) $ 1,434 $ (2,614 ) $ (7,401 ) $ (9,161 ) Six months ended June 30, 2015 Balance at December 31, 2014 $ 5,980 $ 1,349 $ (2,546 ) $ (22,505 ) $ (17,722 ) Other comprehensive income (loss) before reclassifications (2,016 ) 125 — — (1,891 ) Amounts reclassified from accumulated other comprehensive income (loss) (3,134 ) (1,130 ) 68 932 (3,264 ) Balance at June 30, 2015 $ 830 $ 344 $ (2,478 ) $ (21,573 ) $ (22,877 ) Six months ended June 30, 2014 Balance at December 31, 2013 $ (27,510 ) $ 1,652 $ (2,682 ) $ (8,801 ) $ (37,341 ) Other comprehensive income before reclassifications 26,923 512 — 2,144 29,579 Amounts reclassified from accumulated other comprehensive income (loss) 7 (730 ) 68 (744 ) (1,399 ) Balance at June 30, 2014 $ (580 ) $ 1,434 $ (2,614 ) $ (7,401 ) $ (9,161 )

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost and Fair Values of Investment Securities	The following table presents the amortized cost and estimated fair values of investment securities, which were all classified as available for sale: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) June 30, 2015 Equity securities $ 23,981 $ 9,072 $ (12 ) $ 33,041 U.S. Government sponsored agency securities 48,333 57 (130 ) 48,260 State and municipal securities 231,592 5,312 (387 ) 236,517 Corporate debt securities 98,756 3,183 (4,767 ) 97,172 Collateralized mortgage obligations 931,093 4,932 (17,793 ) 918,232 Mortgage-backed securities 998,418 14,112 (3,866 ) 1,008,664 Auction rate securities 106,504 — (7,898 ) 98,606 $ 2,438,677 $ 36,668 $ (34,853 ) $ 2,440,492 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (in thousands) December 31, 2014 Equity securities $ 33,469 $ 14,167 $ (13 ) $ 47,623 U.S. Government securities 200 — — 200 U.S. Government sponsored agency securities 209 5 — 214 State and municipal securities 238,250 7,231 (266 ) 245,215 Corporate debt securities 99,016 5,126 (6,108 ) 98,034 Collateralized mortgage obligations 917,395 5,705 (20,787 ) 902,313 Mortgage-backed securities 914,797 16,978 (2,944 ) 928,831 Auction rate securities 108,751 — (7,810 ) 100,941 $ 2,312,087 $ 49,212 $ (37,928 ) $ 2,323,371
Schedule of Amortized Cost and Fair Values of Debt Securities by Contractual Maturities	The amortized cost and estimated fair values of debt securities as of June 30, 2015 , by contractual maturity, are shown in the following table. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Estimated (in thousands) Due in one year or less $ 57,382 $ 58,372 Due from one year to five years 104,022 106,663 Due from five years to ten years 148,682 151,430 Due after ten years 175,099 164,090 485,185 480,555 Collateralized mortgage obligations 931,093 918,232 Mortgage-backed securities 998,418 1,008,664 $ 2,414,696 $ 2,407,451
Summary of Gains and Losses from Equity and Debt Securities, and Losses Recognized from Other-than-Temporary Impairment	The following table presents information related to the gross realized gains and losses on the sales of equity and debt securities: Gross Gross Other-than- Net Gains (Losses) Three months ended June 30, 2015 (in thousands) Equity securities $ 2,290 $ — $ — $ 2,290 Debt securities 125 — — 125 Total $ 2,415 $ — $ — $ 2,415 Three months ended June 30, 2014 Equity securities $ — $ — $ (12 ) $ (12 ) Debt securities 1,124 — — 1,124 Total $ 1,124 $ — $ (12 ) $ 1,112 Six months ended June 30, 2015 Equity securities $ 4,260 $ — $ — $ 4,260 Debt securities 2,300 — — 2,300 Total $ 6,560 $ — $ — $ 6,560 Six months ended June 30, 2014 Equity securities $ 1 $ — $ (12 ) $ (11 ) Debt securities 1,446 (323 ) — 1,123 Total $ 1,447 $ (323 ) $ (12 ) $ 1,112
Summary Of Other Than Temporary Impairment Charges Recorded In Statement Of Operations [Table Text Block]	The following table presents a summary of the cumulative credit related other-than-temporary impairment charges, recognized as components of earnings, for debt securities held by the Corporation at June 30, 2015 and 2014: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Balance of cumulative credit losses on debt securities, beginning of period $ (12,302 ) $ (19,961 ) $ (16,242 ) $ (20,691 ) Reductions for securities sold during the period 792 2,746 4,730 3,472 Reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security — 1 2 5 Balance of cumulative credit losses on debt securities, end of period $ (11,510 ) $ (17,214 ) $ (11,510 ) $ (17,214 )
Gross Unrealized Losses and Fair Values of Investments by Category and Length of Time in Continuous Unrealized Loss Position	The following table presents the gross unrealized losses and estimated fair values of investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at June 30, 2015 : Less than 12 months 12 months or longer Total Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses (in thousands) U.S. Government sponsored agency securities $ 28,051 $ (130 ) $ — $ — $ 28,051 $ (130 ) State and municipal securities 34,107 (387 ) — — 34,107 (387 ) Corporate debt securities 7,965 (13 ) 35,229 (4,754 ) 43,194 (4,767 ) Collateralized mortgage obligations 95,315 (651 ) 517,338 (17,142 ) 612,653 (17,793 ) Mortgage-backed securities 306,980 (2,498 ) 69,029 (1,368 ) 376,009 (3,866 ) Auction rate securities — — 98,606 (7,898 ) 98,606 (7,898 ) Total debt securities 472,418 (3,679 ) 720,202 (31,162 ) 1,192,620 (34,841 ) Equity securities — — 78 (12 ) 78 (12 ) $ 472,418 $ (3,679 ) $ 720,280 $ (31,174 ) $ 1,192,698 $ (34,853 )
Summary of Amortized Cost and Fair Values of Corporate Debt Securities	The following table presents the amortized cost and estimated fair value of corporate debt securities: June 30, 2015 December 31, 2014 Amortized cost Estimated fair value Amortized cost Estimated fair value (in thousands) Single-issuer trust preferred securities $ 47,613 $ 43,378 $ 47,569 $ 42,016 Subordinated debt 47,595 49,716 47,530 50,023 Pooled trust preferred securities — 530 2,010 4,088 Corporate debt securities issued by financial institutions 95,208 93,624 97,109 96,127 Other corporate debt securities 3,548 3,548 1,907 1,907 Available for sale corporate debt securities $ 98,756 $ 97,172 $ 99,016 $ 98,034

Loans and Allowance for Credi28

Loans and Allowance for Credit Losses (Tables)	6 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Summary of Gross Loans by Type	Loans, net of unearned income are summarized as follows: June 30, December 31, 2014 (in thousands) Real-estate - commercial mortgage $ 5,237,800 $ 5,197,155 Commercial - industrial, financial and agricultural 3,806,699 3,725,567 Real-estate - home equity 1,689,688 1,736,688 Real-estate - residential mortgage 1,369,103 1,377,068 Real-estate - construction 731,925 690,601 Consumer 272,494 265,431 Leasing and other 147,960 127,562 Overdrafts 2,642 4,021 Loans, gross of unearned income 13,258,311 13,124,093 Unearned income (14,081 ) (12,377 ) Loans, net of unearned income $ 13,244,230 $ 13,111,716
Schedule of Allowance for Credit Losses	The following table presents the components of the allowance for credit losses: June 30, December 31, (in thousands) Allowance for loan losses $ 167,485 $ 184,144 Reserve for unfunded lending commitments 1,968 1,787 Allowance for credit losses $ 169,453 $ 185,931
Activity in the Allowance for Credit Losses	The following table presents the activity in the allowance for credit losses: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Balance at beginning of period $ 179,658 $ 199,006 $ 185,931 $ 204,917 Loans charged off (15,372 ) (11,476 ) (21,136 ) (21,744 ) Recoveries of loans previously charged off 2,967 2,412 6,158 4,269 Net loans charged off (12,405 ) (9,064 ) (14,978 ) (17,475 ) Provision for credit losses 2,200 3,500 (1,500 ) 6,000 Balance at end of period $ 169,453 $ 193,442 $ 169,453 $ 193,442 The following table presents the activity in the allowance for loan losses by portfolio segment: Real Estate - Commercial Mortgage Commercial - Industrial, Financial and Agricultural Real Estate - Home Equity Real Estate - Residential Mortgage Real Estate - Construction Consumer Leasing and other and overdrafts Unallocated Total (in thousands) Three months ended June 30, 2015 Balance at March 31, 2015 $ 52,860 $ 57,150 $ 23,481 $ 23,235 $ 8,487 $ 2,527 $ 1,653 $ 8,308 $ 177,701 Loans charged off (1,642 ) (11,166 ) (870 ) (783 ) (87 ) (357 ) (467 ) — (15,372 ) Recoveries of loans previously charged off 451 1,471 189 187 231 368 70 — 2,967 Net loans charged off (1,191 ) (9,695 ) (681 ) (596 ) 144 11 (397 ) — (12,405 ) Provision for loan losses (1) (989 ) 1,715 (294 ) 148 (882 ) 70 359 2,062 2,189 Balance at June 30, 2015 $ 50,680 $ 49,170 $ 22,506 $ 22,787 $ 7,749 $ 2,608 $ 1,615 $ 10,370 $ 167,485 Three months ended June 30, 2014 Balance at March 31, 2014 $ 53,757 $ 50,563 $ 32,460 $ 33,329 $ 9,842 $ 3,324 $ 2,011 $ 11,803 $ 197,089 Loans charged off (2,141 ) (5,512 ) (1,234 ) (1,089 ) (218 ) (449 ) (833 ) — (11,476 ) Recoveries of loans previously charged off 430 775 177 108 158 402 362 — 2,412 Net loans charged off (1,711 ) (4,737 ) (1,057 ) (981 ) (60 ) (47 ) (471 ) — (9,064 ) Provision for loan losses (1) (2,204 ) 3,258 638 396 1,549 29 311 (317 ) 3,660 Balance at June 30, 2014 $ 49,842 $ 49,084 $ 32,041 $ 32,744 $ 11,331 $ 3,306 $ 1,851 $ 11,486 $ 191,685 Six months ended June 30, 2015 Balance at December 31, 2014 $ 53,493 $ 51,378 $ 28,271 $ 29,072 $ 9,756 $ 3,015 $ 1,799 $ 7,360 $ 184,144 Loans charged off (2,351 ) (13,029 ) (1,638 ) (2,064 ) (87 ) (1,137 ) (830 ) — (21,136 ) Recoveries of loans previously charged off 887 2,257 440 346 1,378 609 241 — 6,158 Net loans charged off (1,464 ) (10,772 ) (1,198 ) (1,718 ) 1,291 (528 ) (589 ) — (14,978 ) Provision for loan losses (1) (1,349 ) 8,564 (4,567 ) (4,567 ) (3,298 ) 121 405 3,010 (1,681 ) Balance at June 30, 2015 $ 50,680 $ 49,170 $ 22,506 $ 22,787 $ 7,749 $ 2,608 $ 1,615 $ 10,370 $ 167,485 Six months ended June 30, 2014 Balance at December 31, 2013 $ 55,659 $ 50,330 $ 28,222 $ 33,082 $ 12,649 $ 3,260 $ 3,370 $ 16,208 $ 202,780 Loans charged off (3,527 ) (10,637 ) (2,885 ) (1,935 ) (432 ) (1,200 ) (1,128 ) — (21,744 ) Recoveries of loans previously charged off 474 1,519 533 224 382 611 526 — 4,269 Net loans charged off (3,053 ) (9,118 ) (2,352 ) (1,711 ) (50 ) (589 ) (602 ) — (17,475 ) Provision for loan losses (1) (2,764 ) 7,872 6,171 1,373 (1,268 ) 635 (917 ) (4,722 ) 6,380 Balance at June 30, 2014 $ 49,842 $ 49,084 $ 32,041 $ 32,744 $ 11,331 $ 3,306 $ 1,851 $ 11,486 $ 191,685 (1) The provision for loan losses excluded an $11,000 and $181,000 increase, respectively, in the reserve for unfunded lending commitments for the three and six months ended June 30, 2015 and a $160,000 and $ 380,000 decrease, respectively, in the reserve for unfunded lending commitments for the three and six months ended June 30, 2014 . The total provision for credit losses, comprised of allocations for both funded and unfunded loans, was $2.2 million and negative $1.5 million , respectively, for the three and six months ended June 30, 2015 and $3.5 million and $6.0 million , respectively, for the three and six months ended June 30, 2014 . The following table presents loans, net of unearned income and their related allowance for loan losses, by portfolio segment: Real Estate - Commercial Mortgage Commercial - Industrial, Financial and Agricultural Real Estate - Home Equity Real Estate - Residential Mortgage Real Estate - Construction Consumer Leasing and other and overdrafts Unallocated (1) Total (in thousands) Allowance for loan losses at June 30, 2015: Measured for impairment under FASB ASC Subtopic 450-20 $ 37,228 $ 38,090 $ 15,838 $ 8,763 $ 5,430 $ 2,588 $ 1,615 $ 10,370 $ 119,922 Evaluated for impairment under FASB ASC Section 310-10-35 13,452 11,080 6,668 14,024 2,319 20 — N/A 47,563 $ 50,680 $ 49,170 $ 22,506 $ 22,787 $ 7,749 $ 2,608 $ 1,615 $ 10,370 $ 167,485 Loans, net of unearned income at June 30, 2015: Measured for impairment under FASB ASC Subtopic 450-20 $ 5,172,333 $ 3,764,999 $ 1,676,410 $ 1,315,908 $ 712,975 $ 272,463 $ 136,521 N/A $ 13,051,609 Evaluated for impairment under FASB ASC Section 310-10-35 65,467 41,700 13,278 53,195 18,950 31 — N/A 192,621 $ 5,237,800 $ 3,806,699 $ 1,689,688 $ 1,369,103 $ 731,925 $ 272,494 $ 136,521 N/A $ 13,244,230 Allowance for loan losses at June 30, 2014: Measured for impairment under FASB ASC Subtopic 450-20 $ 33,388 $ 36,603 $ 22,234 $ 11,450 $ 7,163 $ 3,285 $ 1,851 $ 11,486 $ 127,460 Evaluated for impairment under FASB ASC Section 310-10-35 16,454 12,481 9,807 21,294 4,168 21 — N/A 64,225 $ 49,842 $ 49,084 $ 32,041 $ 32,744 $ 11,331 $ 3,306 $ 1,851 $ 11,486 $ 191,685 Loans, net of unearned income at June 30, 2014: Measured for impairment under FASB ASC Subtopic 450-20 $ 5,067,400 $ 3,558,788 $ 1,715,953 $ 1,309,739 $ 606,221 $ 280,534 $ 102,008 N/A $ 12,640,643 Evaluated for impairment under FASB ASC Section 310-10-35 61,334 42,933 14,544 52,237 27,797 23 — N/A 198,868 $ 5,128,734 $ 3,601,721 $ 1,730,497 $ 1,361,976 $ 634,018 $ 280,557 $ 102,008 N/A $ 12,839,511 (1) The unallocated allowance, which was approximately 6% of the total allowance for credit losses as of both June 30, 2015 and June 30, 2014 , was, in the opinion of management, reasonable and appropriate given that the estimates used in the allocation process are inherently imprecise. N/A Not applicable
Total Impaired Loans by Class Segment	The following table presents total impaired loans by class segment: June 30, 2015 December 31, 2014 Unpaid Principal Balance Recorded Investment Related Allowance Unpaid Principal Balance Recorded Investment Related Allowance (in thousands) With no related allowance recorded: Real estate - commercial mortgage $ 29,836 $ 24,357 $ — $ 25,802 $ 23,236 $ — Commercial - secured 24,250 17,557 — 17,599 14,582 — Real estate - residential mortgage 6,630 6,223 — 4,873 4,873 — Construction - commercial residential 13,581 10,699 — 18,041 14,801 — Construction - commercial 1,299 1,156 — 1,707 1,581 — 75,596 59,992 68,022 59,073 With a related allowance recorded: Real estate - commercial mortgage 49,792 41,110 13,452 49,619 40,023 16,715 Commercial - secured 26,694 21,239 10,020 24,824 19,335 12,165 Commercial - unsecured 3,062 2,904 1,060 1,241 1,089 865 Real estate - home equity 18,752 13,278 6,668 19,392 13,458 9,224 Real estate - residential mortgage 56,048 46,972 14,024 56,607 46,478 18,592 Construction - commercial residential 11,976 5,472 1,771 14,007 7,903 2,675 Construction - commercial 1,879 1,342 445 1,501 1,023 459 Construction - other 452 281 103 452 281 137 Consumer - direct 15 15 10 19 19 17 Consumer - indirect 16 16 10 20 19 18 168,686 132,629 47,563 167,682 129,628 60,867 Total $ 244,282 $ 192,621 $ 47,563 $ 235,704 $ 188,701 $ 60,867 As of June 30, 2015 and December 31, 2014 , there were $60.0 million and $59.1 million , respectively, of impaired loans that did not have a related allowance for loan loss. The estimated fair values of the collateral securing these loans exceeded their carrying amount, or they were previously charged down to realizable collateral values. Accordingly, no specific valuation allowance was considered to be necessary. The following table presents average impaired loans by class segment: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 Average Interest Average Interest Average Interest Average Interest (in thousands) With no related allowance recorded: Real estate - commercial mortgage $ 27,410 $ 87 $ 23,162 $ 80 $ 26,018 $ 178 $ 23,606 166 Commercial - secured 16,163 24 21,695 34 15,636 45 21,591 69 Real estate - home equity — — 300 1 — — 300 1 Real estate - residential mortgage 5,541 32 857 5 5,318 60 571 6 Construction - commercial residential 12,171 40 17,853 62 13,048 95 16,482 122 Construction - commercial 925 — 1,418 — 1,144 — 1,604 — 62,210 183 65,285 182 61,164 378 64,154 364 With a related allowance recorded: Real estate - commercial mortgage 40,204 126 38,455 132 40,143 259 37,580 264 Commercial - secured 25,902 38 21,652 33 23,713 74 21,876 71 Commercial - unsecured 2,082 2 757 1 1,751 3 854 2 Real estate - home equity 13,016 33 14,049 28 13,163 64 14,145 48 Real estate - residential mortgage 47,020 270 51,153 300 46,839 543 51,134 594 Construction - commercial residential 6,031 21 7,676 27 6,655 49 9,977 62 Construction - commercial 960 — 723 — 981 — 547 — Construction - other 281 — 413 — 281 — 458 — Consumer - direct 17 — 16 — 18 — 14 — Consumer - indirect 17 — 4 — 17 — 3 — 135,530 490 134,898 521 133,561 992 136,588 1,041 Total $ 197,740 $ 673 $ 200,183 $ 703 $ 194,725 $ 1,370 $ 200,742 1,405 (1) All impaired loans, excluding accruing TDRs, were non-accrual loans. Interest income recognized for the three and six months ended June 30, 2015 and 2014 represents amounts earned on accruing TDRs.
Financing Receivable Credit Quality Indicators	The following table presents internal credit risk ratings for real estate - commercial mortgages, commercial - secured loans, commercial - unsecured loans, construction - commercial residential loans and construction - commercial loans: Pass Special Mention Substandard or Lower Total June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 (dollars in thousands) Real estate - commercial mortgage $ 4,943,773 $ 4,899,016 $ 114,385 $ 127,302 $ 179,642 $ 170,837 $ 5,237,800 $ 5,197,155 Commercial - secured 3,419,331 3,333,486 123,663 120,584 110,666 110,544 3,653,660 3,564,614 Commercial - unsecured 141,431 146,680 3,667 7,463 7,941 6,810 153,039 160,953 Total commercial - industrial, financial and agricultural 3,560,762 3,480,166 127,330 128,047 118,607 117,354 3,806,699 3,725,567 Construction - commercial residential 138,834 136,109 17,526 27,495 30,588 40,066 186,948 203,670 Construction - commercial 469,515 409,631 13,314 12,202 5,587 5,586 488,416 427,419 Total construction (excluding Construction - other) 608,349 545,740 30,840 39,697 36,175 45,652 675,364 631,089 $ 9,112,884 $ 8,924,922 $ 272,555 $ 295,046 $ 334,424 $ 333,843 $ 9,719,863 $ 9,553,811 % of Total 93.8 % 93.4 % 2.8 % 3.1 % 3.4 % 3.5 % 100.0 % 100.0 % The following is a summary of the Corporation's internal risk rating categories: • Pass : These loans do not currently pose undue credit risk and can range from the highest to average quality, depending on the degree of potential risk. • Special Mention : These loans constitute an undue and unwarranted credit risk, but not to a point of justifying a classification of substandard. Loans in this category are currently acceptable, but are nevertheless potentially weak. • Substandard or Lower : These loans are inadequately protected by current sound worth and paying capacity of the borrower. There exists a well-defined weakness or weaknesses that jeopardize the normal repayment of the debt. The risk rating process allows management to identify riskier credits in a timely manner and to allocate resources to managing troubled accounts. The Corporation believes that internal risk ratings are the most relevant credit quality indicator for the class segments presented above. The migration of loans through the various internal risk rating categories is a significant component of the allowance for credit loss methodology, which bases the probability of default on this migration. Assigning risk ratings involves judgment. Risk ratings are initially assigned to loans by loan officers and are reviewed on a regular basis by credit administration staff. The Corporation's loan review officers provide a separate assessment of risk rating accuracy. Ratings may be changed based on the ongoing monitoring procedures performed by loan officers or credit administration staff, or if specific loan review activities identify a deterioration or an improvement in the loan. The Corporation does not assign internal risk ratings to smaller balance, homogeneous loans, such as home equity, residential mortgage, consumer, lease receivables and construction loans to individuals secured by residential real estate. For these loans, the most relevant credit quality indicator is delinquency status. The migration of loans through the various delinquency status categories is a significant component of the allowance for credit losses methodology for those loans, which bases the probability of default on this migration. The following table presents a summary of delinquency and non-performing status for home equity, real estate - residential mortgages, construction loans to individuals and consumer, leasing and other loans by class segment: Performing Delinquent (1) Non-performing (2) Total June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 (dollars in thousands) Real estate - home equity $ 1,665,771 $ 1,711,017 $ 9,285 $ 10,931 $ 14,632 $ 14,740 $ 1,689,688 $ 1,736,688 Real estate - residential mortgage 1,316,650 1,321,139 20,891 26,934 31,562 28,995 1,369,103 1,377,068 Construction - other 55,864 59,180 — — 697 332 56,561 59,512 Consumer - direct 103,985 104,018 2,886 2,891 2,326 2,414 109,197 109,323 Consumer - indirect 161,201 153,358 1,839 2,574 257 176 163,297 156,108 Total consumer 265,186 257,376 4,725 5,465 2,583 2,590 272,494 265,431 Leasing and other and overdrafts 135,895 118,550 553 523 73 133 136,521 119,206 $ 3,439,366 $ 3,467,262 $ 35,454 $ 43,853 $ 49,547 $ 46,790 $ 3,524,367 $ 3,557,905 % of Total 97.6 % 97.5 % 1.0 % 1.2 % 1.4 % 1.3 % 100.0 % 100.0 % (1) Includes all accruing loans 31 days to 89 days past due. (2) Includes all accruing loans 90 days or more past due and all non-accrual loans.
Non-Performing Assets	The following table presents non-performing assets: June 30, December 31, (in thousands) Non-accrual loans $ 129,152 $ 121,080 Accruing loans 90 days or more past due 20,353 17,402 Total non-performing loans 149,505 138,482 Other real estate owned (OREO) 12,763 12,022 Total non-performing assets $ 162,268 $ 150,504
Troubled Debt Restructurings on Financing Receivables	The following table presents TDRs, by class segment: June 30, December 31, (in thousands) Real-estate - residential mortgage $ 31,584 $ 31,308 Real-estate - commercial mortgage 17,482 18,822 Commercial - secured 6,417 5,170 Construction - commercial residential 4,482 9,241 Real estate - home equity 3,299 2,975 Commercial - unsecured 174 67 Consumer - indirect 16 19 Consumer - direct 15 19 Total accruing TDRs 63,469 67,621 Non-accrual TDRs (1) 27,230 24,616 Total TDRs $ 90,699 $ 92,237 (1) Included within non-accrual loans in the preceding table detailing non-performing assets
Loan Terms Modified Under Troubled Debt Restructurings	The following table presents TDRs, by class segment as of June 30, 2015 and 2014 that were modified during the three and six months ended June 30, 2015 and 2014 : Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 Number of Loans Recorded Investment Number of Loans Recorded Investment Number of Loans Recorded Investment Number of Loans Recorded Investment (dollars in thousands) Commercial - secured 3 $ 1,047 1 $ 143 11 $ 7,823 1 $ 143 Real estate - home equity 15 739 10 334 25 1,231 20 863 Real estate - residential mortgage 4 456 9 1,130 8 1,066 15 1,836 Real estate - commercial mortgage 1 132 2 2,334 4 2,627 9 9,804 Construction - commercial residential — — 1 1,366 1 889 2 1,914 Commercial - unsecured — — — — 1 42 — — Consumer - indirect — — 1 6 1 13 4 7 Consumer - direct — — 2 4 — — 6 8 Total 23 $ 2,374 26 $ 5,317 51 $ 13,691 57 $ 14,575 The following table presents TDRs, by class segment, as of June 30, 2015 and 2014 that were modified within the previous 12 months and had a post-modification payment default during the six months ended June 30, 2015 and 2014 . The Corporation defines a payment default as a single missed payment. 2015 2014 Number of Loans Recorded Investment Number of Loans Recorded Investment (dollars in thousands) Commercial - secured 8 $ 4,779 1 $ 10 Real estate - residential mortgage 6 652 9 1,204 Real estate - home equity 7 614 9 777 Real estate - commercial mortgage 2 191 2 35 Construction - commercial residential — — 1 619 Total 23 $ 6,236 22 $ 2,645
Past due Loan Status and Non-Accrual Loans by Portfolio Segment	The following table presents past due status and non-accrual loans by portfolio segment and class segment: June 30, 2015 31-59 Days Past Due 60-89 Days Past Due ≥ 90 Days Past Due and Accruing Non- accrual Total ≥ 90 Days Total Past Due Current Total (in thousands) Real estate - commercial mortgage $ 16,139 $ 1,848 $ 1,947 $ 47,985 $ 49,932 $ 67,919 $ 5,169,881 $ 5,237,800 Commercial - secured 6,489 1,463 730 32,379 33,109 41,061 3,612,599 3,653,660 Commercial - unsecured 307 80 — 2,730 2,730 3,117 149,922 153,039 Total commercial - industrial, financial and agricultural 6,796 1,543 730 35,109 35,839 44,178 3,762,521 3,806,699 Real estate - home equity 7,161 2,124 4,653 9,979 14,632 23,917 1,665,771 1,689,688 Real estate - residential mortgage 16,835 4,056 9,951 21,611 31,562 52,453 1,316,650 1,369,103 Construction - commercial residential 151 — — 11,689 11,689 11,840 175,108 186,948 Construction - commercial — — — 2,498 2,498 2,498 485,918 488,416 Construction - other — — 416 281 697 697 55,864 56,561 Total real estate - construction 151 — 416 14,468 14,884 15,035 716,890 731,925 Consumer - direct 2,159 727 2,326 — 2,326 5,212 103,985 109,197 Consumer - indirect 1,719 120 257 — 257 2,096 161,201 163,297 Total consumer 3,878 847 2,583 — 2,583 7,308 265,186 272,494 Leasing and other and overdrafts 468 85 73 — 73 626 135,895 136,521 Total $ 51,428 $ 10,503 $ 20,353 $ 129,152 $ 149,505 $ 211,436 $ 13,032,794 $ 13,244,230 December 31, 2014 31-59 Days Past Due 60-89 Days Past Due ≥ 90 Days Past Due and Accruing Non- accrual Total ≥ 90 Days Total Past Due Current Total (in thousands) Real estate - commercial mortgage $ 14,399 $ 3,677 $ 800 $ 44,437 $ 45,237 $ 63,313 $ 5,133,842 $ 5,197,155 Commercial - secured 4,839 958 610 28,747 29,357 35,154 3,529,460 3,564,614 Commercial - unsecured 395 65 9 1,022 1,031 1,491 159,462 160,953 Total commercial - industrial, financial and agricultural 5,234 1,023 619 29,769 30,388 36,645 3,688,922 3,725,567 Real estate - home equity 8,048 2,883 4,257 10,483 14,740 25,671 1,711,017 1,736,688 Real estate - residential mortgage 18,789 8,145 8,952 20,043 28,995 55,929 1,321,139 1,377,068 Construction - commercial residential 160 — — 13,463 13,463 13,623 190,047 203,670 Construction - commercial — — — 2,604 2,604 2,604 424,815 427,419 Construction - other — — 51 281 332 332 59,180 59,512 Total real estate - construction 160 — 51 16,348 16,399 16,559 674,042 690,601 Consumer - direct 2,034 857 2,414 — 2,414 5,305 104,018 109,323 Consumer - indirect 2,156 418 176 — 176 2,750 153,358 156,108 Total consumer 4,190 1,275 2,590 — 2,590 8,055 257,376 265,431 Leasing and other and overdrafts 357 166 133 — 133 656 118,550 119,206 Total $ 51,177 $ 17,169 $ 17,402 $ 121,080 $ 138,482 $ 206,828 $ 12,904,888 $ 13,111,716

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	6 Months Ended
	Jun. 30, 2015
Transfers and Servicing [Abstract]
Summary of Changes in Mortgage Servicing Rights	The following table summarizes the changes in mortgage servicing rights ("MSRs"), which are included in other assets on the consolidated balance sheets: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Amortized cost: Balance at beginning of period $ 41,803 $ 41,668 $ 42,148 $ 42,452 Originations of mortgage servicing rights 1,956 1,236 3,513 2,351 Amortization (2,161 ) (318 ) (4,063 ) (2,217 ) Balance at end of period $ 41,598 $ 42,586 $ 41,598 $ 42,586

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Compensation Expense and Related Tax Benefits	The following table presents compensation expense and the related tax benefits for equity awards recognized in the consolidated statements of income: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Stock-based compensation expense $ 1,767 $ 1,989 $ 2,838 $ 3,022 Tax benefit (622 ) (446 ) (914 ) (709 ) Stock-based compensation expense, net of tax $ 1,145 $ 1,543 $ 1,924 $ 2,313

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	The net periodic benefit cost for the Corporation’s Pension Plan consisted of the following components: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Service cost (1) $ 145 $ 92 $ 290 $ 184 Interest cost 851 853 1,702 1,706 Expected return on plan assets (752 ) (810 ) (1,504 ) (1,621 ) Net amortization and deferral 782 244 1,564 488 Net periodic benefit cost $ 1,026 $ 379 $ 2,052 $ 757 (1) The Pension Plan service cost recorded for the six months ended June 30, 2015 and 2014 was related to administrative costs associated with the plan and was not due to the accrual of additional participant benefits. The net periodic cost (benefit) of the Corporation’s Postretirement Plan consisted of the following components, excluding the $1.5 million plan amendment gain in 2014: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Service cost (1) $ — $ — $ — $ 15 Interest cost 52 48 104 109 Net accretion and deferral (65 ) (84 ) (130 ) (179 ) Net periodic benefit $ (13 ) $ (36 ) $ (26 ) $ (55 ) (1) As a result of the plan amendment, additional participant benefits are not accrued under the Postretirement Plan after February 1, 2014.

Derivative Financial Instrume32

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Notional Amounts and Fair Values of Derivative Financial Instruments	The following table presents a summary of the notional amounts and fair values of derivative financial instruments: June 30, 2015 December 31, 2014 Notional Asset Notional Asset (in thousands) Interest Rate Locks with Customers Positive fair values $ 126,063 $ 1,268 $ 89,655 $ 1,391 Negative fair values 2,240 (48 ) 301 (6 ) Net interest rate locks with customers 1,220 1,385 Forward Commitments Positive fair values 111,387 1,705 — — Negative fair values 27,107 (24 ) 93,802 (1,164 ) Net forward commitments 1,681 (1,164 ) Interest Rate Swaps with Customers Positive fair values 558,750 19,317 468,080 19,716 Negative fair values 46,937 (234 ) 25,418 (198 ) Net interest rate swaps with customers 19,083 19,518 Interest Rate Swaps with Dealer Counterparties Positive fair values 46,937 234 25,418 198 Negative fair values 558,750 (19,317 ) 468,080 (19,716 ) Net interest rate swaps with dealer counterparties (19,083 ) (19,518 ) Foreign Exchange Contracts with Customers Positive fair values 8,200 572 11,616 810 Negative fair values 7,128 (384 ) 5,250 (441 ) Net foreign exchange contracts with customers 188 369 Foreign Exchange Contracts with Correspondent Banks Positive fair values 9,296 629 5,287 446 Negative fair values 9,824 (672 ) 13,572 (876 ) Net foreign exchange contracts with correspondent banks (43 ) (430 ) Net derivative fair value asset $ 3,046 $ 160
Summary of Fair Value Gains and Losses on Derivative Financial Instruments	The following table presents a summary of the fair value gains and losses on derivative financial instruments: Three months ended June 30 Six months ended June 30 2015 2014 2015 2014 (in thousands) Interest rate locks with customers $ (1,287 ) $ 1,203 $ (165 ) $ 1,592 Forward commitments 2,291 (1,503 ) 2,845 (3,001 ) Interest rate swaps with customers (9,839 ) 6,135 (435 ) 10,340 Interest rate swaps with dealer counterparties 9,839 (6,135 ) 435 (10,340 ) Foreign exchange contracts with customers (748 ) 105 (181 ) 297 Foreign exchange contracts with correspondent banks 711 (98 ) 387 (366 ) Net fair value gains (losses) on derivative financial instruments $ 967 $ (293 ) $ 2,886 $ (1,478 )

Fair Value Option (Tables)

Fair Value Option (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Summary of Corporation's Mortgage Loans Held for Sale	The following table presents a summary of the Corporation’s mortgage loans held for sale: June 30, December 31, (in thousands) Cost $ 33,760 $ 17,080 Fair value 33,980 17,522

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	6 Months Ended
	Jun. 30, 2015
Offsetting [Abstract]
Balance Sheet Offsetting	The following table presents the Corporation's financial instruments that are eligible for offset, and the effects of offsetting, on the consolidated balance sheets: Gross Amounts Gross Amounts Not Offset Recognized on the Consolidated on the Balance Sheets Consolidated Financial Cash Net Balance Sheets Instruments (1) Collateral (2) Amount (in thousands) June 30, 2015 Interest rate swap derivative assets $ 19,551 $ (235 ) $ — $ 19,316 Foreign exchange derivative assets with correspondent banks 629 (629 ) — — Total $ 20,180 $ (864 ) $ — $ 19,316 Interest rate swap derivative liabilities $ 19,551 $ (235 ) $ (19,290 ) $ 26 Foreign exchange derivative liabilities with correspondent banks 672 (629 ) — 43 Total $ 20,223 $ (864 ) $ (19,290 ) $ 69 December 31, 2014 Interest rate swap derivative assets $ 19,914 $ (206 ) $ — $ 19,708 Foreign exchange derivative assets with correspondent banks 446 (446 ) — — Total $ 20,360 $ (652 ) $ — $ 19,708 Interest rate swap derivative liabilities $ 19,914 $ (206 ) $ (19,210 ) $ 498 Foreign exchange derivative liabilities with correspondent banks 876 (446 ) (310 ) 120 Total $ 20,790 $ (652 ) $ (19,520 ) $ 618 (1) For interest rate swap and foreign exchange derivative assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default. For interest rate swap and foreign exchange derivative liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default. (2) Amounts represent cash collateral posted on interest rate swap transactions with financial institution counterparties. Interest rate swaps with customers are collateralized by the underlying loans to those borrowers.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Summary of Outstanding Commitments to Extend Credit and Letters of Credit	The outstanding amounts of commitments to extend credit and letters of credit were as follows: June 30, December 31, 2014 (in thousands) Commitments to extend credit $ 5,071,983 $ 4,389,064 Standby letters of credit 387,996 382,465 Commercial letters of credit 35,769 32,304

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables present summaries of the Corporation’s assets and liabilities measured at fair value on a recurring basis and reported on the consolidated balance sheets: June 30, 2015 Level 1 Level 2 Level 3 Total (in thousands) Mortgage loans held for sale $ — $ 33,980 $ — $ 33,980 Available for sale investment securities: Equity securities 33,041 — — 33,041 U.S. Government sponsored agency securities — 48,260 — 48,260 State and municipal securities — 236,517 — 236,517 Corporate debt securities — 92,822 4,350 97,172 Collateralized mortgage obligations — 918,232 — 918,232 Mortgage-backed securities — 1,008,664 — 1,008,664 Auction rate securities — — 98,606 98,606 Total available for sale investments 33,041 2,304,495 102,956 2,440,492 Other assets 18,002 22,524 — 40,526 Total assets $ 51,043 $ 2,360,999 $ 102,956 $ 2,514,998 Other liabilities $ 17,848 $ 19,622 $ — $ 37,470 December 31, 2014 Level 1 Level 2 Level 3 Total (in thousands) Mortgage loans held for sale $ — $ 17,522 $ — $ 17,522 Available for sale investment securities: Equity securities 47,623 — — 47,623 U.S. Government securities — 200 — 200 U.S. Government sponsored agency securities — 214 — 214 State and municipal securities — 245,215 — 245,215 Corporate debt securities — 90,126 7,908 98,034 Collateralized mortgage obligations — 902,313 — 902,313 Mortgage-backed securities — 928,831 — 928,831 Auction rate securities — — 100,941 100,941 Total available for sale investments 47,623 2,166,899 108,849 2,323,371 Other assets 17,682 21,305 — 38,987 Total assets $ 65,305 $ 2,205,726 $ 108,849 $ 2,379,880 Other liabilities $ 17,737 $ 21,084 $ — $ 38,821
Schedule of Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis using Level 3 Inputs	The following table presents the changes in the Corporation’s available for sale investment securities measured at fair value on a recurring basis using unobservable inputs (Level 3): Three months ended June 30, 2015 Pooled Trust Single-issuer ARCs (in thousands) Balance at March 31, 2015 $ 1,084 $ 3,820 $ 98,932 Sales (554 ) — — Unrealized adjustment to fair value (1) — (2 ) (420 ) Discount accretion (2) — 2 94 Balance at June 30, 2015 $ 530 $ 3,820 $ 98,606 Three months ended June 30, 2014 Balance at March 31, 2014 $ 5,659 $ 3,820 $ 147,713 Sales (1,394 ) — — Unrealized adjustment to fair value (1) 38 (2 ) 124 Settlements - calls (28 ) — (1,081 ) Discount accretion (2) — 2 175 Balance at June 30, 2014 $ 4,275 $ 3,820 $ 146,931 Six months ended June 30, 2015 Pooled Trust Single-issuer ARCs (in thousands) Balance at December 31, 2014 $ 4,088 $ 3,820 $ 100,941 Sales (3,633 ) — — Unrealized adjustment to fair value (2) 190 (4 ) (88 ) Settlements - calls (117 ) — (2,446 ) Discount accretion (3) 2 4 199 Balance at June 30, 2015 $ 530 $ 3,820 $ 98,606 Six months ended June 30, 2014 Balance at December 31, 2013 $ 5,306 $ 3,781 $ 159,274 Sales (1,394 ) — (11,912 ) Unrealized adjustment to fair value (2) 559 36 248 Settlements - calls (200 ) — (1,081 ) Discount accretion (3) 4 3 402 Balance at June 30, 2014 $ 4,275 $ 3,820 $ 146,931 (1) Pooled trust preferred securities, single-issuer trust preferred securities and ARCs are classified as available for sale investment securities; as such, the unrealized adjustment to fair value was recorded as an unrealized holding gain (loss) and included as a component of available for sale investment securities on the consolidated balance sheets. (2) Included as a component of net interest income on the consolidated statements of income.
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis	The following table presents the Corporation’s financial assets measured at fair value on a nonrecurring basis and reported on the Corporation’s consolidated balance sheets: June 30, 2015 Level 1 Level 2 Level 3 Total (in thousands) Net loans $ — $ — $ 145,058 $ 145,058 Other financial assets — — 54,361 54,361 Total assets $ — $ — $ 199,419 $ 199,419 December 31, 2014 Level 1 Level 2 Level 3 Total (in thousands) Net loans $ — $ — $ 127,834 $ 127,834 Other financial assets — — 54,170 54,170 Total assets $ — $ — $ 182,004 $ 182,004
Details of Book Value and Fair Value of Financial Instruments	As required by FASB ASC Section 825-10-50, the following table details the book values and estimated fair values of the Corporation’s financial instruments as of June 30, 2015 and December 31, 2014 . In addition, a general description of the methods and assumptions used to estimate such fair values is also provided. June 30, 2015 December 31, 2014 Book Value Estimated Book Value Estimated (in thousands) FINANCIAL ASSETS Cash and due from banks $ 100,455 $ 100,455 $ 105,702 $ 105,702 Interest-bearing deposits with other banks 322,218 322,218 358,130 358,130 Federal Reserve Bank and Federal Home Loan Bank stock 65,106 65,106 64,953 64,953 Loans held for sale (1) 33,980 33,980 17,522 17,522 Available for sale investment securities (1) 2,440,492 2,440,492 2,323,371 2,323,371 Loans, net of unearned income (1) 13,244,230 13,129,521 13,111,716 13,030,543 Accrued interest receivable 41,193 41,193 41,818 41,818 Other financial assets (1) 157,792 157,792 169,764 169,764 FINANCIAL LIABILITIES Demand and savings deposits $ 10,501,956 $ 10,501,956 $ 10,296,055 $ 10,296,055 Time deposits 3,003,753 2,999,352 3,071,451 3,069,883 Short-term borrowings 409,035 409,035 329,719 329,719 Accrued interest payable 15,172 15,172 18,045 18,045 Other financial liabilities (1) 175,220 175,220 172,786 172,786 Federal Home Loan Bank advances and long-term debt 1,132,641 1,152,810 1,139,413 1,142,980 (1) These financial instruments, or certain financial instruments within these categories, are measured at fair value on the Corporation’s consolidated balance sheets. Descriptions of the fair value determinations for these financial instruments are disclosed above.

Basis of Presentation Basis o37

Basis of Presentation Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Tax Credit Carryforward [Line Items]
Income Tax Expense (Benefit)	$ 12,175	$ 13,500	$ 25,679	$ 27,734
Other Assets
Tax Credit Carryforward [Line Items]
Investments, low income housing	156,800		156,800		$ 155,600
LIH Low Income Housing
Tax Credit Carryforward [Line Items]
Income Tax Expense (Benefit)	$ (2,400)	$ (2,800)	$ (4,800)	$ (5,300)

Net Income Per Share Reconcilia

Net Income Per Share Reconciliation of Weighted Average Common Shares Outstanding (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted average shares outstanding (basic)	176,433	188,139	177,446	188,799
Impact of common stock equivalents	1,098	1,043	1,042	1,033
Weighted average shares outstanding (diluted)	177,531	189,182	178,488	189,832

Net Income Per Share Narrative

Net Income Per Share Narrative (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1.8	3.3	2	3.2

Accumulated Other Comprehensi40

Accumulated Other Comprehensive Income Changes in Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Equity [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	$ (18,474)	$ 19,984	$ (3,103)	$ 41,419
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	6,466	(6,994)	1,087	(14,496)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(12,008)	12,990	(2,016)	26,923
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax	(2,413)	(1,112)	(6,558)	(1,112)
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Tax	844	389	2,294	389
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	(1,569)	(723)	(4,264)	(723)
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Income (Loss), before Tax, Including Portion Attributable to Noncontrolling Interest		497	192	788
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent		(174)	(67)	(276)
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	323	125	512
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	52	52	104	105
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	(18)	(18)	(36)	(37)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	34	34	68	68
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax	717	160	1,434	309
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Tax Effect	(251)	(56)	(502)	(109)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax	466	104	932	200
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax				(1,452)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Tax				508
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Net of Tax	0	0	0	(944)
Other comprehensive income, pension and other postretirement benefit plans, net unamortized gain (loss) arising during period, before tax				3,291
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax				(1,147)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0	0	0	2,144
Other Comprehensive Income (Loss), before Tax	(20,118)	19,581	(7,931)	43,348
Other Comprehensive Income (Loss), Tax	7,041	(6,853)	2,776	(15,168)
Other Comprehensive Income (Loss)	$ (13,077)	$ 12,728	$ (5,155)	$ 28,180

Accumulated Other Comprehensi41

Accumulated Other Comprehensive Income Components of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ (9,800)	$ (21,889)	$ (17,722)	$ (37,341)
Other comprehensive loss before reclassifications	(12,008)	13,313	(1,891)	29,579
Amounts reclassified from accumulated other comprehensive income (loss)	(1,069)	(585)	(3,264)	(1,399)
Ending Balance	(22,877)	(9,161)	(22,877)	(9,161)
Unrealized Gains on Investment Securities Not Other-Than-Temporarily Impaired [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	14,311	(13,577)	5,980	(27,510)
Other comprehensive loss before reclassifications	(12,008)	12,990	(2,016)	26,923
Amounts reclassified from accumulated other comprehensive income (loss)	(1,473)	7	(3,134)	7
Ending Balance	830	(580)	830	(580)
Unrealized Non-Credit Losses on Other-Than-Temporarily Impaired Debt Securities [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	440	1,841	1,349	1,652
Other comprehensive loss before reclassifications	0	323	125	512
Amounts reclassified from accumulated other comprehensive income (loss)	(96)	(730)	(1,130)	(730)
Ending Balance	344	1,434	344	1,434
Unrealized Effective Portions of Losses on Forward-Starting Interest Rate Swaps [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(2,512)	(2,648)	(2,546)	(2,682)
Other comprehensive loss before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	34	34	68	68
Ending Balance	(2,478)	(2,614)	(2,478)	(2,614)
Unrecognized Pension and Postretirement Plan Income (Costs) [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(22,039)	(7,505)	(22,505)	(8,801)
Other comprehensive loss before reclassifications	0	0	0	2,144
Amounts reclassified from accumulated other comprehensive income (loss)	466	104	932	(744)
Ending Balance	$ (21,573)	$ (7,401)	$ (21,573)	$ (7,401)

Investment Securities Schedule

Investment Securities Schedule of Amortized Cost and Fair Values of Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Investments [Line Items]
Amortized Cost	$ 2,438,677	$ 2,312,087
Gross Unrealized Gains	36,668	49,212
Gross Unrealized Losses	(34,853)	(37,928)
Estimated Fair Value	2,440,492	2,323,371
Equity Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	23,981	33,469
Gross Unrealized Gains	9,072	14,167
Gross Unrealized Losses	(12)	(13)
Estimated Fair Value	33,041	47,623
U.S. Government Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost		200
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Estimated Fair Value		200
U.S. Government-Sponsored Agency Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	48,333	209
Gross Unrealized Gains	57	5
Gross Unrealized Losses	(130)	0
Estimated Fair Value	48,260	214
State and Municipal Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	231,592	238,250
Gross Unrealized Gains	5,312	7,231
Gross Unrealized Losses	(387)	(266)
Estimated Fair Value	236,517	245,215
Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	98,756	99,016
Gross Unrealized Gains	3,183	5,126
Gross Unrealized Losses	(4,767)	(6,108)
Estimated Fair Value	97,172	98,034
Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost	931,093	917,395
Gross Unrealized Gains	4,932	5,705
Gross Unrealized Losses	(17,793)	(20,787)
Estimated Fair Value	918,232	902,313
Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	998,418	914,797
Gross Unrealized Gains	14,112	16,978
Gross Unrealized Losses	(3,866)	(2,944)
Estimated Fair Value	1,008,664	928,831
Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	106,504	108,751
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(7,898)	(7,810)
Estimated Fair Value	$ 98,606	$ 100,941

Investment Securities Schedul43

Investment Securities Schedule of Amortized Cost and Fair Values of Debt Securities by Contractual Maturities (Details) $ in Thousands	Jun. 30, 2015USD ($)
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis	$ 57,382
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value	58,372
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis	104,022
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value	106,663
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis	148,682
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value	151,430
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	175,099
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	164,090
Available for Sale Securities, Debt Securities, Amortized Cost, Before Securities Without Debt Maturities	485,185
Available for Sale Securities, Debt Maturities, Before Securities Without Single Maturities	480,555
Available-for-sale Debt Securities, Amortized Cost Basis	2,414,696
Available for Sale, Estimated Fair Value	2,407,451
Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	931,093
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	918,232
Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	998,418
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 1,008,664

Investment Securities Summary o

Investment Securities Summary of Gains and Losses from Equity and Debt Securities, and Losses from Other-than-Temporary Impairment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	$ 2,415	$ 1,124	$ 6,560	$ 1,447
Gross Realized Losses	0	0	0	(323)
Other-than- temporary Impairment Losses	0	12	0	12
Net Gains (Losses)	2,415	1,112	6,560	1,112
Equity Securities [Member]
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	2,290	0	4,260	1
Gross Realized Losses	0	0	0	0
Other-than- temporary Impairment Losses	0	12	0	12
Net Gains (Losses)	2,290	(12)	4,260	(11)
Debt Securities [Member]
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	125	1,124	2,300	1,446
Gross Realized Losses	0	0	0	(323)
Other-than- temporary Impairment Losses	0	0	0	0
Net Gains (Losses)	$ 125	$ 1,124	$ 2,300	$ 1,123

Investment Securities Summary45

Investment Securities Summary of Cumulative Other-than-Temporary Impairment Charges Recognized as Components of Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance of cumulative credit losses on debt securities, beginning of period	$ (12,302)	$ (19,961)	$ (16,242)	$ (20,691)
Reductions for securities sold during the period	792	2,746	4,730	3,472
Reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security	0	1	2	5
Balance of cumulative credit losses on debt securities, end of period	$ (11,510)	$ (17,214)	$ (11,510)	$ (17,214)

Investment Securities Gross Unr

Investment Securities Gross Unrealized Losses and Fair Values of Investments by Category and Length of Time in a Continuous Unrealized Loss Position (Details) $ in Thousands	Jun. 30, 2015USD ($)
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 472,418
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3,679)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	720,280
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(31,174)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,192,698
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(34,853)
US Government Agencies Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(130)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(130)
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	34,107
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(387)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	34,107
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(387)
Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	7,965
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(13)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	35,229
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(4,754)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	43,194
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(4,767)
Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	95,315
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(651)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	517,338
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(17,142)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	612,653
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(17,793)
Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	306,980
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(2,498)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	69,029
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,368)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	376,009
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(3,866)
Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	98,606
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(7,898)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	98,606
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(7,898)
Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	472,418
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3,679)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	720,202
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(31,162)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,192,620
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(34,841)
Equity Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	78
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(12)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	78
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(12)
U.S. Government-Sponsored Agency Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	28,051
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	$ 28,051

Investment Securities Summary47

Investment Securities Summary of Amortized Cost and Fair Values of Corporate Debt Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	$ 2,414,696
Corporate debt securities	2,407,451
Corporate Debt Securities Issued by Financial Institutions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	95,208	$ 97,109
Corporate debt securities	93,624	96,127
Single-issuer Trust Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	47,613	47,569
Corporate debt securities	43,378	42,016
Subordinated Debt
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	47,595	47,530
Corporate debt securities	49,716	50,023
Pooled Trust Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	0	2,010
Corporate debt securities	530	4,088
Other Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	3,548	1,907
Corporate debt securities	3,548	1,907
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	98,756	99,016
Corporate debt securities	$ 97,172	$ 98,034

Investment Securities Narrative

Investment Securities Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)Security	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)Security	Jun. 30, 2014USD ($)	Dec. 31, 2014USD ($)
Schedule of Investments [Line Items]
Available-for-sale Securities Pledged as Collateral	$ 1,600,000		$ 1,600,000		$ 1,700,000
Amortized cost	2,438,677		2,438,677		2,312,087
Available-for-sale Securities, Gross Realized Gain (Loss)	2,415	$ 1,112	6,560	$ 1,112
Available-for-sale Securities, Fair Value Disclosure	2,440,492		2,440,492		2,323,371
Single Bank Stock Investment, cost basis	10,700		10,700
Single Bank Stock Investment, Fair Value	$ 15,700		$ 15,700
Percent Ownership In An Individual Financial Institution	57.70%		57.70%
IndividualBankStockInvestmentPercenttoTotalPortfolio	5.00%		5.00%
Auction Rate Certificates Not Subject To Any Additional Other Than Temporary Impairment Charges Fair Value	$ 98,600		$ 98,600
Domestic Corporate debt securities	97,200		97,200
Equity Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	23,981		23,981		33,469
Available-for-sale Securities, Gross Realized Gain (Loss)	2,290	$ (12)	4,260	$ (11)
Available-for-sale Securities, Fair Value Disclosure	33,041		33,041		47,623
Equity Securities Financial Institution [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Equity Securities	27,200		27,200		41,800
Amortized cost	18,200		18,200
Available-for-sale Securities, Fair Value Disclosure	27,200		27,200
Equity Securities, Other [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Equity Securities	5,800		5,800
Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	106,504		106,504		108,751
Available-for-sale Securities, Fair Value Disclosure	98,606		98,606		$ 100,941
Pooled Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	$ 1,900		1,900
Available-for-sale Securities, Gross Realized Gain (Loss)			$ 2,300
Number of Securities Sold | Security			3
Single-issuer Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Unrealized Loss on Securities			$ 4,200
Number of Trust Preferred Securities | Security	19		19
Number of Trust Preferred Securities Not Rated | Security	3		3
Moody's, A2 Rating [Member] | Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Carrying Value Auction Rate Securities Rated Investment Grade	$ 93,000		$ 93,000
Percentage Auction Rate Securities Investment Grade	94.00%		94.00%
Moody's, A3 Rating [Member] | Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Carrying Value Auction Rate Securities Rated Investment Grade	$ 6,000		$ 6,000
Percentage Auction Rate Securities Investment Grade	6.00%		6.00%
External Credit Rating, BBB [Member] | Single-issuer Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	$ 4,700		$ 4,700
Available-for-sale Securities, Fair Value Disclosure	3,800		3,800
External Credit Rating, Rated Below Investment Grade [Member] | Pooled Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	0		0
Available-for-sale Securities, Fair Value Disclosure	530		530
External Credit Rating, Rated Below Investment Grade [Member] | Single-issuer Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	14,500		14,500
Available-for-sale Securities, Fair Value Disclosure	$ 13,100		$ 13,100
Number of Trust Preferred Securities | Security	7		7

Loans and Allowance for Credi49

Loans and Allowance for Credit Losses Summary Of Gross Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	$ 13,258,311	$ 13,124,093
Unearned income	(14,081)	(12,377)
Loans, net of unearned income	13,244,230	13,111,716	$ 12,839,511
Real-estate commercial mortage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	5,237,800	5,197,155
Loans, net of unearned income	5,237,800	5,197,155	5,128,734
Commercial - industrial, financial, and agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	3,806,699	3,725,567
Loans, net of unearned income	3,806,699	3,725,567	3,601,721
Real-estate - home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	1,689,688	1,736,688
Loans, net of unearned income	1,689,688	1,736,688	1,730,497
Real-estate - residential mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	1,369,103	1,377,068
Loans, net of unearned income	1,369,103	1,377,068	1,361,976
Real-estate - construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	731,925	690,601
Loans, net of unearned income	731,925	690,601	634,018
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	272,494	265,431
Loans, net of unearned income	272,494	265,431	$ 280,557
Leasing and other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	147,960	127,562
Overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	$ 2,642	$ 4,021

Loans and Allowance for Credi50

Loans and Allowance for Credit Losses Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
Allowance for loan losses	$ 167,485	$ 177,701	$ 184,144	$ 191,685	$ 197,089	$ 202,780
Reserve for unfunded lending commitments	1,968		1,787
Allowance for credit losses	$ 169,453	$ 179,658	$ 185,931	$ 193,442	$ 199,006	$ 204,917

Loans and Allowance for Credi51

Loans and Allowance for Credit Losses Activity in the Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 179,658	$ 199,006	$ 185,931	$ 204,917
Loans charged off	(15,372)	(11,476)	(21,136)	(21,744)
Recoveries of loans previously charged off	2,967	2,412	6,158	4,269
Net loans charged off	(12,405)	(9,064)	(14,978)	(17,475)
Provision for credit losses	2,200	3,500	(1,500)	6,000
Balance at end of period	$ 169,453	$ 193,442	$ 169,453	$ 193,442

Loans and Allowance for Credi52

Loans and Allowance for Credit Losses Allowance for Loan Losses by Portfolio Segment (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance		$ 177,701,000	$ 197,089,000	$ 184,144,000	$ 202,780,000
Loans charged off		(15,372,000)	(11,476,000)	(21,136,000)	(21,744,000)
Recoveries of loans previously charged off		2,967,000	2,412,000	6,158,000	4,269,000
Net loans charged off		(12,405,000)	(9,064,000)	(14,978,000)	(17,475,000)
Provision for loan losses	[1]	2,189,000	3,660,000	(1,681,000)	6,380,000
Ending Balance		167,485,000	191,685,000	167,485,000	191,685,000
Provision for loan losses gross		(11,000)	160,000	(180,000)	380,000
Provision for Loan and Lease Losses		2,200,000	3,500,000	(1,500,000)	6,000,000
Real-estate commercial mortage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance		52,860,000	53,757,000	53,493,000	55,659,000
Loans charged off		(1,642,000)	(2,141,000)	(2,351,000)	(3,527,000)
Recoveries of loans previously charged off		451,000	430,000	887,000	474,000
Net loans charged off		(1,191,000)	(1,711,000)	(1,464,000)	(3,053,000)
Provision for loan losses	[1]	(989,000)	(2,204,000)	(1,349,000)	(2,764,000)
Ending Balance		50,680,000	49,842,000	50,680,000	49,842,000
Commercial - industrial, financial, and agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance		57,150,000	50,563,000	51,378,000	50,330,000
Loans charged off		(11,166,000)	(5,512,000)	(13,029,000)	(10,637,000)
Recoveries of loans previously charged off		1,471,000	775,000	2,257,000	1,519,000
Net loans charged off		(9,695,000)	(4,737,000)	(10,772,000)	(9,118,000)
Provision for loan losses	[1]	1,715,000	3,258,000	8,564,000	7,872,000
Ending Balance		49,170,000	49,084,000	49,170,000	49,084,000
Real-estate - home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance		23,481,000	32,460,000	28,271,000	28,222,000
Loans charged off		(870,000)	(1,234,000)	(1,638,000)	(2,885,000)
Recoveries of loans previously charged off		189,000	177,000	440,000	533,000
Net loans charged off		(681,000)	(1,057,000)	(1,198,000)	(2,352,000)
Provision for loan losses	[1]	(294,000)	638,000	(4,567,000)	6,171,000
Ending Balance		22,506,000	32,041,000	22,506,000	32,041,000
Real-estate - residential mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance		23,235,000	33,329,000	29,072,000	33,082,000
Loans charged off		(783,000)	(1,089,000)	(2,064,000)	(1,935,000)
Recoveries of loans previously charged off		187,000	108,000	346,000	224,000
Net loans charged off		(596,000)	(981,000)	(1,718,000)	(1,711,000)
Provision for loan losses	[1]	148,000	396,000	(4,567,000)	1,373,000
Ending Balance		22,787,000	32,744,000	22,787,000	32,744,000
Real-estate - construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance		8,487,000	9,842,000	9,756,000	12,649,000
Loans charged off		(87,000)	(218,000)	(87,000)	(432,000)
Recoveries of loans previously charged off		231,000	158,000	1,378,000	382,000
Net loans charged off		144,000	(60,000)	1,291,000	(50,000)
Provision for loan losses	[1]	(882,000)	1,549,000	(3,298,000)	(1,268,000)
Ending Balance		7,749,000	11,331,000	7,749,000	11,331,000
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance		2,527,000	3,324,000	3,015,000	3,260,000
Loans charged off		(357,000)	(449,000)	(1,137,000)	(1,200,000)
Recoveries of loans previously charged off		368,000	402,000	609,000	611,000
Net loans charged off		11,000	(47,000)	(528,000)	(589,000)
Provision for loan losses	[1]	70,000	29,000	121,000	635,000
Ending Balance		2,608,000	3,306,000	2,608,000	3,306,000
Leasing and other and overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance		1,653,000	2,011,000	1,799,000	3,370,000
Loans charged off		(467,000)	(833,000)	(830,000)	(1,128,000)
Recoveries of loans previously charged off		70,000	362,000	241,000	526,000
Net loans charged off		(397,000)	(471,000)	(589,000)	(602,000)
Provision for loan losses	[1]	359,000	311,000	405,000	(917,000)
Ending Balance		1,615,000	1,851,000	1,615,000	1,851,000
Unallocated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance		8,308,000	11,803,000	7,360,000	16,208,000
Loans charged off		0	0	0	0
Recoveries of loans previously charged off		0	0	0	0
Net loans charged off		0	0	0	0
Provision for loan losses	[1]	2,062,000	(317,000)	3,010,000	(4,722,000)
Ending Balance	[2]	$ 10,370,000	$ 11,486,000	$ 10,370,000	$ 11,486,000
[1]	The provision for loan losses excluded an $11,000 and $181,000 increase, respectively, in the reserve for unfunded lending commitments for the three and six months ended June 30, 2015 and a $160,000 and $380,000 decrease, respectively, in the reserve for unfunded lending commitments for the three and six months ended June 30, 2014. The total provision for credit losses, comprised of allocations for both funded and unfunded loans, was $2.2 million and negative $1.5 million, respectively, for the three and six months ended June 30, 2015 and $3.5 million and $6.0 million, respectively, for the three and six months ended June 30, 2014.
[2]	The unallocated allowance, which was approximately 6% of the total allowance for credit losses as of both June 30, 2015 and June 30, 2014, was, in the opinion of management, reasonable and appropriate given that the estimates used in the allocation process are inherently imprecise.

Loans and Allowance for Credi53

Loans and Allowance for Credit Losses Present Loans, Net of Unearned Income and Their Related Allowance for Loan Losses, by Portfolio Segment (Details) - USD ($) $ in Thousands		Jun. 30, 2015		Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014		Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20		$ 119,922				$ 127,460
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35		47,563				64,225
Allowance for loan losses		167,485		$ 177,701	$ 184,144	191,685		$ 197,089	$ 202,780
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20		13,051,609				12,640,643
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35		192,621				198,868
Loans, net of unearned income		$ 13,244,230			13,111,716	$ 12,839,511
Percentage of unallocated allowance		6.00%				6.00%
Real-estate commercial mortage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20		$ 37,228				$ 33,388
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35		13,452				16,454
Allowance for loan losses		50,680		52,860	53,493	49,842		53,757	55,659
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20		5,172,333				5,067,400
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35		65,467				61,334
Loans, net of unearned income		5,237,800			5,197,155	5,128,734
Commercial - industrial, financial, and agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20		38,090				36,603
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35		11,080				12,481
Allowance for loan losses		49,170		57,150	51,378	49,084		50,563	50,330
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20		3,764,999				3,558,788
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35		41,700				42,933
Loans, net of unearned income		3,806,699			3,725,567	3,601,721
Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20		15,838				22,234
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35		6,668				9,807
Allowance for loan losses		22,506		23,481	28,271	32,041		32,460	28,222
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20		1,676,410				1,715,953
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35		13,278				14,544
Loans, net of unearned income		1,689,688			1,736,688	1,730,497
Real-estate - residential mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20		8,763				11,450
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35		14,024				21,294
Allowance for loan losses		22,787		23,235	29,072	32,744		33,329	33,082
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20		1,315,908				1,309,739
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35		53,195				52,237
Loans, net of unearned income		1,369,103			1,377,068	1,361,976
Real-estate - construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20		5,430				7,163
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35		2,319				4,168
Allowance for loan losses		7,749		8,487	9,756	11,331		9,842	12,649
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20		712,975				606,221
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35		18,950				27,797
Loans, net of unearned income		731,925			690,601	634,018
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20		2,588				3,285
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35		20				21
Allowance for loan losses		2,608		2,527	3,015	3,306		3,324	3,260
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20		272,463				280,534
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35		31				23
Loans, net of unearned income		272,494			265,431	280,557
Leasing and other and overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20		1,615				1,851
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35		0				0
Allowance for loan losses		1,615		1,653	1,799	1,851		2,011	3,370
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20		136,521				102,008
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35		0				0
Loans, net of unearned income		136,521			119,206	102,008
Unallocated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	[1]	10,370				11,486
Allowance for loan losses		$ 10,370	[1]	$ 8,308	$ 7,360	$ 11,486	[1]	$ 11,803	$ 16,208
[1]	The unallocated allowance, which was approximately 6% of the total allowance for credit losses as of both June 30, 2015 and June 30, 2014, was, in the opinion of management, reasonable and appropriate given that the estimates used in the allocation process are inherently imprecise.

Loans and Allowance for Credi54

Loans and Allowance for Credit Losses Total Impaired Loans by Class Segments (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	$ 75,596	$ 68,022
Unpaid principal balance, with related allowance	168,686	167,682
Unpaid Principal Balance	244,282	235,704
Recorded investment, with no related allowance	59,992	59,073
Recorded investment, with related allowance	132,629	129,628
Recorded Investment	192,621	188,701
Related Allowance	47,563	60,867
Real-estate commercial mortage [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	29,836	25,802
Unpaid principal balance, with related allowance	49,792	49,619
Recorded investment, with no related allowance	24,357	23,236
Recorded investment, with related allowance	41,110	40,023
Related Allowance	13,452	16,715
Commercial - Secured [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	24,250	17,599
Unpaid principal balance, with related allowance	26,694	24,824
Recorded investment, with no related allowance	17,557	14,582
Recorded investment, with related allowance	21,239	19,335
Related Allowance	10,020	12,165
Commercial - unsecured [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with related allowance	3,062	1,241
Recorded investment, with related allowance	2,904	1,089
Related Allowance	1,060	865
Real-estate - home equity [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with related allowance	18,752	19,392
Recorded investment, with related allowance	13,278	13,458
Related Allowance	6,668	9,224
Real-estate - residential mortgage [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	6,630	4,873
Unpaid principal balance, with related allowance	56,048	56,607
Recorded investment, with no related allowance	6,223	4,873
Recorded investment, with related allowance	46,972	46,478
Related Allowance	14,024	18,592
Construction - commercial residential [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	13,581	18,041
Unpaid principal balance, with related allowance	11,976	14,007
Recorded investment, with no related allowance	10,699	14,801
Recorded investment, with related allowance	5,472	7,903
Related Allowance	1,771	2,675
Construction - Commercial [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	1,299	1,707
Unpaid principal balance, with related allowance	1,879	1,501
Recorded investment, with no related allowance	1,156	1,581
Recorded investment, with related allowance	1,342	1,023
Related Allowance	445	459
Construction other [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with related allowance	452	452
Recorded investment, with related allowance	281	281
Related Allowance	103	137
Consumer - direct [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with related allowance	15	19
Recorded investment, with related allowance	15	19
Related Allowance	10	17
Consumer - Indirect [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with related allowance	16	20
Recorded investment, with related allowance	16	19
Related Allowance	$ 10	$ 18

Loans and Allowance for Credi55

Loans and Allowance for Credit Losses Average Impaired Loans by Class Segment (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2015		Jun. 30, 2014
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	$ 62,210		$ 65,285		$ 61,164		$ 64,154
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	183	[1]	182	[1]	378	[1]	364
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	135,530		134,898		133,561		136,588
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	490	[1]	521	[1]	992	[1]	1,041
Impaired Financing Receivable, Average Recorded Investment	197,740		200,183		194,725		200,742
Impaired Financing Receivable, Interest Income, Accrual Method	673	[1]	703	[1]	1,370	[1]	1,405
Real-estate commercial mortage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	27,410		23,162		26,018		23,606
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	87	[1]	80	[1]	178	[1]	166
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	40,204		38,455		40,143		37,580
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	126	[1]	132	[1]	259	[1]	264
Commercial - Secured [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	16,163		21,695		15,636		21,591
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	24	[1]	34	[1]	45	[1]	69
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	25,902		21,652		23,713		21,876
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	38	[1]	33	[1]	74	[1]	71
Commercial - unsecured [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	2,082		757		1,751		854
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	2	[1]	1	[1]	3	[1]	2
Real-estate - home equity [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0		300		0		300
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0	[1]	1	[1]	0	[1]	1
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	13,016		14,049		13,163		14,145
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	33	[1]	28	[1]	64	[1]	48
Real-estate - residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	5,541		857		5,318		571
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	32	[1]	5	[1]	60	[1]	6
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	47,020		51,153		46,839		51,134
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	270	[1]	300	[1]	543	[1]	594
Construction - Commercial Residential [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	12,171		17,853		13,048		16,482
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	40	[1]	62	[1]	95	[1]	122
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	6,031		7,676		6,655		9,977
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	21	[1]	27	[1]	49	[1]	62
Construction - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	925		1,418		1,144		1,604
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0	[1]	0	[1]	0	[1]	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	960		723		981		547
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0	[1]	0	[1]	0	[1]	0
Construction other [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	281		413		281		458
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0	[1]	0	[1]	0	[1]	0
Consumer - direct [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	17		16		18		14
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0	[1]	0	[1]	0	[1]	0
Consumer - Indirect [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	17		4		17		3
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	$ 0	[1]	$ 0	[1]	$ 0	[1]	$ 0
[1]	All impaired loans, excluding accruing TDRs, were non-accrual loans. Interest income recognized for the three and six months ended June 30, 2015 and 2014 represents amounts earned on accruing TDRs.

Loans and Allowance for Credi56

Loans and Allowance for Credit Losses Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 13,244,230	$ 13,111,716	$ 12,839,511
Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 9,719,863	$ 9,553,811
Percentage of total loans rated	100.00%	100.00%
Real-estate commercial mortage [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 5,237,800	$ 5,197,155	5,128,734
Commercial - industrial, financial, and agricultural [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,806,699	3,725,567	$ 3,601,721
Commercial - Secured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,653,660	3,564,614
Commercial - Unsecured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	153,039	160,953
Construction, Excluding Contstruction Other [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	675,364	631,089
Construction - Commercial Residential [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	186,948	203,670
Construction - Commercial [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	488,416	427,419
Pass [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 9,112,884	$ 8,924,922
Percentage of total loans rated	93.80%	93.40%
Pass [Member] | Real-estate commercial mortage [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 4,943,773	$ 4,899,016
Pass [Member] | Commercial - industrial, financial, and agricultural [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,560,762	3,480,166
Pass [Member] | Commercial - Secured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,419,331	3,333,486
Pass [Member] | Commercial - Unsecured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	141,431	146,680
Pass [Member] | Construction, Excluding Contstruction Other [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	608,349	545,740
Pass [Member] | Construction - Commercial Residential [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	138,834	136,109
Pass [Member] | Construction - Commercial [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	469,515	409,631
Special Mention [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 272,555	$ 295,046
Percentage of total loans rated	2.80%	3.10%
Special Mention [Member] | Real-estate commercial mortage [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 114,385	$ 127,302
Special Mention [Member] | Commercial - industrial, financial, and agricultural [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	127,330	128,047
Special Mention [Member] | Commercial - Secured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	123,663	120,584
Special Mention [Member] | Commercial - Unsecured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,667	7,463
Special Mention [Member] | Construction, Excluding Contstruction Other [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	30,840	39,697
Special Mention [Member] | Construction - Commercial Residential [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	17,526	27,495
Special Mention [Member] | Construction - Commercial [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,314	12,202
Substandard [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 334,424	$ 333,843
Percentage of total loans rated	3.40%	3.50%
Substandard [Member] | Real-estate commercial mortage [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 179,642	$ 170,837
Substandard [Member] | Commercial - industrial, financial, and agricultural [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	118,607	117,354
Substandard [Member] | Commercial - Secured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	110,666	110,544
Substandard [Member] | Commercial - Unsecured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,941	6,810
Substandard [Member] | Construction, Excluding Contstruction Other [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	36,175	45,652
Substandard [Member] | Construction - Commercial Residential [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	30,588	40,066
Substandard [Member] | Construction - Commercial [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 5,587	$ 5,586

Loans and Allowance for Credi57

Loans and Allowance for Credit Losses Summary of Delinquency and Non-Performing Status by Portfolio Segment (Details) $ in Thousands		6 Months Ended
		Jun. 30, 2015USD ($)	Dec. 31, 2014USD ($)	Jun. 30, 2014USD ($)
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		$ 13,244,230	$ 13,111,716	$ 12,839,511
Real-estate - home equity [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		1,689,688	1,736,688	1,730,497
Real-estate - residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		1,369,103	1,377,068	1,361,976
Construction other [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		56,561	59,512
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		272,494	265,431	280,557
Consumer - direct [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		109,197	109,323
Consumer - Indirect [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		163,297	156,108
Leasing and other and overdrafts [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		136,521	119,206	$ 102,008
Real Estate, Home Equity, Construction, Other, Consumer and Leasing [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		3,524,367	3,557,905
Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		$ 9,719,863	$ 9,553,811
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans		100.00%	100.00%
Performing Financing Receivable [Member] | Real-estate - home equity [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		$ 1,665,771	$ 1,711,017
Performing Financing Receivable [Member] | Real-estate - residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		1,316,650	1,321,139
Performing Financing Receivable [Member] | Construction other [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		55,864	59,180
Performing Financing Receivable [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		265,186	257,376
Performing Financing Receivable [Member] | Consumer - direct [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		103,985	104,018
Performing Financing Receivable [Member] | Consumer - Indirect [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		161,201	153,358
Performing Financing Receivable [Member] | Leasing and other and overdrafts [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		135,895	118,550
Performing Financing Receivable [Member] | Real Estate, Home Equity, Construction, Other, Consumer and Leasing [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income		$ 3,439,366	$ 3,467,262
Performing Financing Receivable [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans		97.60%	97.50%
Delinquent [Member] | Real-estate - home equity [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[1]	$ 9,285	$ 10,931
Delinquent [Member] | Real-estate - residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[1]	20,891	26,934
Delinquent [Member] | Construction other [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[1]	0	0
Delinquent [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[1]	4,725	5,465
Delinquent [Member] | Consumer - direct [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[1]	2,886	2,891
Delinquent [Member] | Consumer - Indirect [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[1]	1,839	2,574
Delinquent [Member] | Leasing and other and overdrafts [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[1]	553	523
Delinquent [Member] | Real Estate, Home Equity, Construction, Other, Consumer and Leasing [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[1]	$ 35,454	$ 43,853
Delinquent [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans	[1]	1.00%	1.20%
Nonperforming Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Days past due		90
Nonperforming Financing Receivable [Member] | Real-estate - home equity [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[2]	$ 14,632	$ 14,740
Nonperforming Financing Receivable [Member] | Real-estate - residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[2]	31,562	28,995
Nonperforming Financing Receivable [Member] | Construction other [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[2]	697	332
Nonperforming Financing Receivable [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[2]	2,583	2,590
Nonperforming Financing Receivable [Member] | Consumer - direct [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[2]	2,326	2,414
Nonperforming Financing Receivable [Member] | Consumer - Indirect [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[2]	257	176
Nonperforming Financing Receivable [Member] | Leasing and other and overdrafts [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[2]	73	133
Nonperforming Financing Receivable [Member] | Real Estate, Home Equity, Construction, Other, Consumer and Leasing [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	[2]	$ 49,547	$ 46,790
Nonperforming Financing Receivable [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans	[2]	1.40%	1.30%
Minimum [Member] | Delinquent [Member]
Financing Receivable, Impaired [Line Items]
Days past due		31
Maximum [Member] | Delinquent [Member]
Financing Receivable, Impaired [Line Items]
Days past due		89
[1]	)Includes all accruing loans 31 days to 89 days past due
[2]	Includes all accruing loans 90 days or more past due and all non-accrual loans.

Loans and Allowance for Credi58

Loans and Allowance for Credit Losses Non-Performing Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Receivables [Abstract]
Non-accrual loans	$ 129,152	$ 121,080
Accruing loans 90 days or more past due	20,353	17,402
Total non-performing loans	149,505	138,482
Other real estate owned (OREO)	12,763	12,022
Total non-performing assets	$ 162,268	$ 150,504

Loans and Allowance for Credi59

Loans and Allowance for Credit Losses Loans Modified Under Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Accruing TDRs	$ 63,469	$ 67,621
Non-accrual TDRs	27,230	24,616	[1]
Total TDRs	90,699	92,237
Real-estate - residential mortgage [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	31,584	31,308
Real-estate commercial mortage [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	17,482	18,822
Construction - Commercial Residential [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	4,482	9,241
Commercial - Secured [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	6,417	5,170
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	3,299	2,975
Commercial - unsecured [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	174	67
Consumer - direct [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	15	19
Consumer Other Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	$ 16	$ 19
[1]	Included within non-accrual loans in the preceding table detailing non-performing assets.

Loans and Allowance for Credi60

Loans and Allowance for Credit Losses Troubled Debt Restructuring Modification (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)loans	Jun. 30, 2014USD ($)loans	Jun. 30, 2015USD ($)loans	Jun. 30, 2014USD ($)loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	23	26	51	57
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 2,374	$ 5,317	$ 13,691	$ 14,575
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	23	22
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 6,236	$ 2,645
Real-estate commercial mortage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	2	4	9
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 132	$ 2,334	$ 2,627	$ 9,804
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 191	$ 35
Real-estate - residential mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	4	9	8	15
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 456	$ 1,130	$ 1,066	$ 1,836
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	6	9
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 652	$ 1,204
Construction - commercial residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	1	1	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 1,366	$ 889	$ 1,914
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 619
Real-estate - home equity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	15	10	25	20
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 739	$ 334	$ 1,231	$ 863
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	7	9
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 614	$ 777
Commercial - Secured [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	3	1	11	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 1,047	$ 143	$ 7,823	$ 143
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	8	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 4,779	$ 10
Commercial - unsecured [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	0	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 0	$ 42	$ 0
Consumer - direct [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	2	0	6
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 4	$ 0	$ 8
Consumer - Indirect [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	1	1	4
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 6	$ 13	$ 7

Loans and Allowance for Credi61

Loans and Allowance for Credit Losses Past Due Loan Status and Non-Accrual Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	$ 51,428	$ 51,177
60-89 Days Past Due	10,503	17,169
>90 Days Past Due and Accruing	20,353	17,402
Non-accrual	129,152	121,080
Total >90 Days	149,505	138,482
Total Past Due	211,436	206,828
Current	13,032,794	12,904,888
Loans, net of unearned income	13,244,230	13,111,716	$ 12,839,511
Real-estate commercial mortage [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	16,139	14,399
60-89 Days Past Due	1,848	3,677
>90 Days Past Due and Accruing	1,947	800
Non-accrual	47,985	44,437
Total >90 Days	49,932	45,237
Total Past Due	67,919	63,313
Current	5,169,881	5,133,842
Loans, net of unearned income	5,237,800	5,197,155	5,128,734
Commercial - industrial, financial, and agricultural [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	6,796	5,234
60-89 Days Past Due	1,543	1,023
>90 Days Past Due and Accruing	730	619
Non-accrual	35,109	29,769
Total >90 Days	35,839	30,388
Total Past Due	44,178	36,645
Current	3,762,521	3,688,922
Loans, net of unearned income	3,806,699	3,725,567	3,601,721
Commercial - Secured [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	6,489	4,839
60-89 Days Past Due	1,463	958
>90 Days Past Due and Accruing	730	610
Non-accrual	32,379	28,747
Total >90 Days	33,109	29,357
Total Past Due	41,061	35,154
Current	3,612,599	3,529,460
Loans, net of unearned income	3,653,660	3,564,614
Commercial - unsecured [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	307	395
60-89 Days Past Due	80	65
>90 Days Past Due and Accruing	0	9
Non-accrual	2,730	1,022
Total >90 Days	2,730	1,031
Total Past Due	3,117	1,491
Current	149,922	159,462
Loans, net of unearned income	153,039	160,953
Real-estate - construction [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	151	160
60-89 Days Past Due	0	0
>90 Days Past Due and Accruing	416	51
Non-accrual	14,468	16,348
Total >90 Days	14,884	16,399
Total Past Due	15,035	16,559
Current	716,890	674,042
Loans, net of unearned income	731,925	690,601	634,018
Real-estate - home equity [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	7,161	8,048
60-89 Days Past Due	2,124	2,883
>90 Days Past Due and Accruing	4,653	4,257
Non-accrual	9,979	10,483
Total >90 Days	14,632	14,740
Total Past Due	23,917	25,671
Current	1,665,771	1,711,017
Loans, net of unearned income	1,689,688	1,736,688	1,730,497
Real-estate - residential mortgage [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	16,835	18,789
60-89 Days Past Due	4,056	8,145
>90 Days Past Due and Accruing	9,951	8,952
Non-accrual	21,611	20,043
Total >90 Days	31,562	28,995
Total Past Due	52,453	55,929
Current	1,316,650	1,321,139
Loans, net of unearned income	1,369,103	1,377,068	1,361,976
Construction - Commercial Residential [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	151	160
60-89 Days Past Due	0	0
>90 Days Past Due and Accruing	0	0
Non-accrual	11,689	13,463
Total >90 Days	11,689	13,463
Total Past Due	11,840	13,623
Current	175,108	190,047
Loans, net of unearned income	186,948	203,670
Construction - Commercial [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	0	0
60-89 Days Past Due	0	0
>90 Days Past Due and Accruing	0	0
Non-accrual	2,498	2,604
Total >90 Days	2,498	2,604
Total Past Due	2,498	2,604
Current	485,918	424,815
Loans, net of unearned income	488,416	427,419
Construction other [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	0	0
60-89 Days Past Due	0	0
>90 Days Past Due and Accruing	416	51
Non-accrual	281	281
Total >90 Days	697	332
Total Past Due	697	332
Current	55,864	59,180
Loans, net of unearned income	56,561	59,512
Consumer [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	3,878	4,190
60-89 Days Past Due	847	1,275
>90 Days Past Due and Accruing	2,583	2,590
Non-accrual	0	0
Total >90 Days	2,583	2,590
Total Past Due	7,308	8,055
Current	265,186	257,376
Loans, net of unearned income	272,494	265,431	280,557
Consumer - direct [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	2,159	2,034
60-89 Days Past Due	727	857
>90 Days Past Due and Accruing	2,326	2,414
Non-accrual	0	0
Total >90 Days	2,326	2,414
Total Past Due	5,212	5,305
Current	103,985	104,018
Loans, net of unearned income	109,197	109,323
Consumer - Indirect [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	1,719	2,156
60-89 Days Past Due	120	418
>90 Days Past Due and Accruing	257	176
Non-accrual	0	0
Total >90 Days	257	176
Total Past Due	2,096	2,750
Current	161,201	153,358
Loans, net of unearned income	163,297	156,108
Leasing and other and overdrafts [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	468	357
60-89 Days Past Due	85	166
>90 Days Past Due and Accruing	73	133
Non-accrual	0	0
Total >90 Days	73	133
Total Past Due	626	656
Current	135,895	118,550
Loans, net of unearned income	$ 136,521	$ 119,206	$ 102,008

Loans and Allowance for Credi62

Loans and Allowance for Credit Losses Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Loan and Lease Losses	$ 2,200	$ 3,500	$ (1,500)	$ 6,000
Allowance for Loan and Lease Losses, Period Increase (Decrease)			$ 7,500
Impaired loans with principal balances approximately in percentage			72.00%	79.00%
Loan to value ratio in the Corporation's policy	70.00%		70.00%
Recorded investment, with no related allowance	$ 59,992		$ 59,992		$ 59,073
TDR additional commitments to lend	6,000		6,000		$ 3,900
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum balance of loans evaluated individually for impairment			1,000
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum balance of loans evaluated individually for impairment			1,000
Impaired loans balances, real estate as collateral	$ 1,000		$ 1,000

Mortgage Servicing Rights Summa

Mortgage Servicing Rights Summary of Changes in Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Amortized Cost:
Servicing Asset at Fair Value, Amount	$ 45,700		$ 45,700
Mortgages [Member]
Amortized Cost:
Valuation Allowance for Impairment of Recognized Servicing Assets, Period Increase (Decrease)			0	$ 0
Residential Mortgage [Member]
Amortized Cost:
Balance at beginning of period	41,803	$ 41,668	42,148	42,452
Originations of mortgage servicing rights	1,956	1,236	3,513	2,351
Amortization	(2,161)	(318)	(4,063)	(2,217)
Balance at end of period	$ 41,598	$ 42,586	$ 41,598	$ 42,586

Stock-Based Compensation Compen

Stock-Based Compensation Compensation Expense and Related Tax Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation expense	$ 1,767	$ 1,989	$ 2,838	$ 3,022
Tax benefit	(622)	(446)	(914)	(709)
Stock-based compensation expense, net of tax	$ 1,145	$ 1,543	$ 1,924	$ 2,313

Stock-Based Compensation Narrat

Stock-Based Compensation Narrative (Details) - Jun. 30, 2015 - shares	Total	Total
Statement [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Options Expiration Term		10 years
Directors' Plan [Member]
Statement [Line Items]
Shares reserved for future grants under the stock option and compensation plan	396,000	396,000
Employee Stock Option [Member]
Statement [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1		3 years
Shares reserved for future grants under the stock option and compensation plan	11,600,000	11,600,000
Performance Shares [Member]
Statement [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	403,000
Restricted Stock Units (RSUs) [Member]
Statement [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	139,500

Employee Benefit Plans Summary

Employee Benefit Plans Summary of Pension Plan and Postretirement Plan Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands		Feb. 01, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pension Plan [Member]
Define Benefit Plan Disclosure [Line Items]
Service cost	[1]		$ 145	$ 92	$ 290	$ 184
Interest cost			851	853	1,702	1,706
Expected return on plan assets			(752)	(810)	(1,504)	(1,621)
Net amortization and deferral			782	244	1,564	488
Net periodic benefit cost			1,026	379	2,052	757
Postretirement Plan [Member]
Define Benefit Plan Disclosure [Line Items]
Service cost	[2]		0	0	0	15
Interest cost			52	48	104	109
Net accretion and deferral			(65)	(84)	(130)	(179)
Net periodic benefit cost			(13)	$ (36)	$ (26)	$ (55)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments		$ 1,500
Defined Benefit Plan, Curtailments			$ 3,400
[1]	The Pension Plan service cost recorded for the six months ended June 30, 2015 and 2014 was related to administrative costs associated with the plan and was not due to the accrual of additional participant benefits.
[2]	As a result of the plan amendment, additional participant benefits are not accrued under the Postretirement Plan after February 1, 2014.

Derivative Financial Instrume67

Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Foreign Currency Open Position	$ 500,000
Derivative asset, fair value	20,180	$ 20,360
Derivative liability, fair value	20,223	20,790
Derivative asset (liability), net	3,046	160
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	126,063	89,655
Derivative liability, notional amount	2,240	301
Derivative asset, fair value	1,268	1,391
Derivative liability, fair value	48	6
Derivative asset (liability), net	1,220	1,385
Forward Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	111,387	0
Derivative liability, notional amount	27,107	93,802
Derivative asset, fair value	1,705	0
Derivative liability, fair value	24	1,164
Derivative asset (liability), net	1,681	(1,164)
Interest Rate Swap with Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	558,750	468,080
Derivative liability, notional amount	46,937	25,418
Derivative asset, fair value	19,317	19,716
Derivative liability, fair value	234	198
Derivative asset (liability), net	19,083	19,518
Interest Rate Swap with Counterparty [Member]
Derivative [Line Items]
Derivative asset, notional amount	46,937	25,418
Derivative liability, notional amount	558,750	468,080
Derivative asset, fair value	234	198
Derivative liability, fair value	19,317	19,716
Derivative asset (liability), net	(19,083)	(19,518)
Foreign Exchange Contracts With Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	8,200	11,616
Derivative liability, notional amount	7,128	5,250
Derivative asset, fair value	572	810
Derivative liability, fair value	384	441
Derivative asset (liability), net	188	369
Foreign Exchange Contracts With Correspondent Banks [Member]
Derivative [Line Items]
Derivative asset, notional amount	9,296	5,287
Derivative liability, notional amount	9,824	13,572
Derivative asset, fair value	629	446
Derivative liability, fair value	672	876
Derivative asset (liability), net	$ (43)	$ (430)

Derivative Financial Instrume68

Derivative Financial Instruments Fair Value Gains and Losses on Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Mortgage Banking Income [Member] | Interest rate lock with customers [Member]
Derivative [Line Items]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	$ (1,287)	$ 1,203	$ (165)	$ 1,592
Mortgage Banking Income [Member] | Forward Commitments [Member]
Derivative [Line Items]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	2,291	(1,503)	2,845	(3,001)
Other Income [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	967	(293)	2,886	(1,478)
Other Income [Member] | Interest Rate Swap with Customer [Member]
Derivative [Line Items]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	(9,839)	6,135	(435)	10,340
Other Income [Member] | Interest Rate Swap with Counterparty [Member]
Derivative [Line Items]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	9,839	(6,135)	435	(10,340)
Other Income [Member] | Foreign Exchange Contracts With Customer [Member]
Derivative [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	(748)	105	(181)	297
Other Income [Member] | Foreign Exchange Contracts With Correspondent Banks [Member]
Derivative [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	$ 711	$ (98)	$ 387	$ (366)

Fair Value Option Summary of Co

Fair Value Option Summary of Corporation's Mortgage Loans Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Mortgages	$ 33,980		$ 33,980		$ 17,522
Mortgage Loans Held For Sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gain (loss) in fair values of mortgage loans held for sale	(483)	$ 518	(222)	$ 815
Mortgage Loans Held For Sale [Member] | Cost [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Mortgages	33,760		33,760		17,080
Mortgage Loans Held For Sale [Member] | Fair Value [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Mortgages	$ 33,980		$ 33,980		$ 17,522

Balance Sheet Offsetting (Detai

Balance Sheet Offsetting (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Offsetting Assets [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets		$ 20,180	$ 20,360
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	[1]	(864)	(652)
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	[2]	0	0
Net Amount		19,316	19,708
Offsetting Liabilities [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets		20,223	20,790
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	[1]	(864)	(652)
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	[2]	(19,290)	(19,520)
Net Amount		69	618
Foreign Exchange Contract [Member]
Offsetting Assets [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets		629	446
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	[1]	(629)	(446)
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	[2]	0
Net Amount		0
Offsetting Liabilities [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets		672	876
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	[1]	(629)	(446)
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	[2]	0	(310)
Net Amount		43	120
Interest Rate Swap [Member]
Offsetting Assets [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets		19,551	19,914
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	[1]	(235)	(206)
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	[2]	0	0
Net Amount		19,316	19,708
Offsetting Liabilities [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets		19,551	19,914
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	[1]	(235)	(206)
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	[2]	(19,290)	(19,210)
Net Amount		$ 26	$ 498
[1]	For interest rate swap and foreign exchange derivative assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default. For interest rate swap and foreign exchange derivative liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default.
[2]	Amounts represent cash collateral posted on interest rate swap transactions with financial institution counterparties. Interest rate swaps with customers are collateralized by the underlying loans to those borrowers.

Commitments and Contingencies O

Commitments and Contingencies Outstanding Commitments to Extend Credit and Letters of Credit (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Residential Mortgage Principal Balance Repurchase Request Received	$ 918	$ 543
Residential Mortgage Principal Balance FHLB Credit Enhancement	140,000
Residential Mortgage Repurchase Reserves FHLB Credit Enhancement	2,100	2,300
Commitments to Extend Credit [Member] | Reserve for Off-balance Sheet Activities [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation allowances and Reserves, Balance	5,071,983	4,389,064
Standby Letters of Credit [Member] | Reserve for Off-balance Sheet Activities [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation allowances and Reserves, Balance	387,996	382,465
Commercial Letters of Credit [Member] | Reserve for Off-balance Sheet Activities [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation allowances and Reserves, Balance	35,769	32,304
Residential Mortgage [Member] | Reserve for Off-balance Sheet Activities [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation allowances and Reserves, Balance	$ 2,900	$ 3,200

Fair Value Measurements Assets

Fair Value Measurements Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 2,440,492	$ 2,323,371
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	33,980	17,522
Available-for-sale Securities, Fair Value Disclosure	2,440,492	2,323,371
Other Assets, Fair Value Disclosure	40,526	38,987
Assets, Fair Value Disclosure	2,514,998	2,379,880
Liabilities, Fair Value Disclosure	37,470	38,821
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	33,041	47,623
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	33,041	47,623
U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure		200
U.S. Government Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure		200
U.S. Government-Sponsored Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	48,260	214
U.S. Government-Sponsored Agency Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	48,260	214
State and Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	236,517	245,215
State and Municipal Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	236,517	245,215
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	97,172	98,034
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	97,172	98,034
Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	918,232	902,313
Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	918,232	902,313
Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	1,008,664	928,831
Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	1,008,664	928,831
Auction Rate Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	98,606	100,941
Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	98,606	100,941
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0	0
Available-for-sale Securities, Fair Value Disclosure	33,041	47,623
Other Assets, Fair Value Disclosure	18,002	17,682
Assets, Fair Value Disclosure	51,043	65,305
Liabilities, Fair Value Disclosure	17,848	17,737
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	33,041	47,623
Fair Value, Inputs, Level 1 [Member] | U.S. Government Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 1 [Member] | U.S. Government-Sponsored Agency Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | State and Municipal Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	33,980	17,522
Available-for-sale Securities, Fair Value Disclosure	2,304,495	2,166,899
Other Assets, Fair Value Disclosure	22,524	21,305
Assets, Fair Value Disclosure	2,360,999	2,205,726
Liabilities, Fair Value Disclosure	19,622	21,084
Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | U.S. Government Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure		200
Fair Value, Inputs, Level 2 [Member] | U.S. Government-Sponsored Agency Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	48,260	214
Fair Value, Inputs, Level 2 [Member] | State and Municipal Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	236,517	245,215
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	92,822	90,126
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	918,232	902,313
Fair Value, Inputs, Level 2 [Member] | Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	1,008,664	928,831
Fair Value, Inputs, Level 2 [Member] | Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0	0
Available-for-sale Securities, Fair Value Disclosure	102,956	108,849
Other Assets, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	102,956	108,849
Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | U.S. Government Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 3 [Member] | U.S. Government-Sponsored Agency Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | State and Municipal Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	4,350	7,908
Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 98,606	$ 100,941

Fair Value Measurements Changes

Fair Value Measurements Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Level 3 Inputs (Details) - Fair Value, Measurements, Recurring [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pooled Trust Preferred Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period		$ 1,084	$ 5,659	$ 4,088	$ 5,306
Sales		(554)	(1,394)	(3,633)	(1,394)
Unrealized adjustment to fair value	[1]	0	38	190	559
Settlements - calls			(28)	(117)	(200)
(Premium amortization) discount accretion	[2]	0	0	2	4
Balance, end of period		530	4,275	530	4,275
Single-issuer Trust Preferred Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period		3,820	3,820	3,820	3,781
Sales		0	0	0	0
Unrealized adjustment to fair value	[1]	(2)	(2)	(4)	36
Settlements - calls			0	0	0
(Premium amortization) discount accretion	[2]	2	2	4	3
Balance, end of period		3,820	3,820	3,820	3,820
Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period		98,932	147,713	100,941	159,274
Sales		0	0	0	(11,912)
Unrealized adjustment to fair value	[1]	(420)	124	(88)	248
Settlements - calls			(1,081)	(2,446)	(1,081)
(Premium amortization) discount accretion	[2]	94	175	199	402
Balance, end of period		$ 98,606	$ 146,931	$ 98,606	$ 146,931
[1]	Pooled trust preferred securities, single-issuer trust preferred securities and ARCs are classified as available for sale investment securities; as such, the unrealized adjustment to fair value was recorded as an unrealized holding gain (loss) and included as a component of available for sale investment securities on the consolidated balance sheets.
[2]	Included as a component of net interest income on the consolidated statements of income.

Fair Value Measurements Asset74

Fair Value Measurements Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	$ 145,058	$ 127,834
Other financial assets	54,361	54,170
Assets, Fair Value Disclosure	199,419	182,004
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	0	0
Other financial assets	0	0
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	0	0
Other financial assets	0	0
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	145,058	127,834
Other financial assets	54,361	54,170
Assets, Fair Value Disclosure	$ 199,419	$ 182,004

Fair Value Measurements Details

Fair Value Measurements Details of Book Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
Available for sale investment securities		$ 2,440,492	$ 2,323,371
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
Cash and Cash Equivalents		100,455	105,702
Interest-Rate Deposits with Other Banks		322,218	358,130
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure		65,106	64,953
Loans Held-for-sale	[1]	33,980	17,522
Available for sale investment securities	[1]	2,440,492	2,323,371
Loans, net of unearned income	[1]	13,244,230	13,111,716
Accrued Interest Receivable		41,193	41,818
Other Financial Assets	[1]	157,792	169,764
Demand and Savings Deposit Liabilities, Fair Value Disclosure		10,501,956	10,296,055
Time Deposit Liabilities, Fair Value Disclosure		3,003,753	3,071,451
Short-term borrowings		409,035	329,719
Accrued interest payable		15,172	18,045
Other Financial Liabilities	[1]	175,220	172,786
Federal Home Loan Bank Advances And Debt Long Term, Fair Value Disclosre		1,132,641	1,139,413
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
Cash and Cash Equivalents		100,455	105,702
Interest-Rate Deposits with Other Banks		322,218	358,130
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure		65,106	64,953
Loans Held-for-sale	[1]	33,980	17,522
Available for sale investment securities	[1]	2,440,492	2,323,371
Loans, net of unearned income	[1]	13,129,521	13,030,543
Accrued Interest Receivable		41,193	41,818
Other Financial Assets	[1]	157,792	169,764
Demand and Savings Deposit Liabilities, Fair Value Disclosure		10,501,956	10,296,055
Time Deposit Liabilities, Fair Value Disclosure		2,999,352	3,069,883
Short-term borrowings		409,035	329,719
Accrued interest payable		15,172	18,045
Other Financial Liabilities	[1]	175,220	172,786
Federal Home Loan Bank Advances And Debt Long Term, Fair Value Disclosre		$ 1,152,810	$ 1,142,980
[1]	These financial instruments, or certain financial instruments within these categories, are measured at fair value on the Corporation’s consolidated balance sheets. Descriptions of the fair value determinations for these financial instruments are disclosed above.

Fair Value Measurements Narrati

Fair Value Measurements Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Equity Securities, Value Test Coverage, Percent	80.00%
Fair Value, Equity Securities, Fair Value Price Difference Threshold, Percent	5.00%
Corporate debt securities	$ 2,407,451
Significant Input, Assumed Market Return to Liquidity, Years	5 years
Other real estate owned (OREO)	$ 12,763	$ 12,022
Short Term Borrowings, Reprice Period, In Days	90
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed	11.30%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate	9.60%
Equity Securities Financial Institution [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Equity Securities	$ 27,200	41,800
Other Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Equity Securities	5,800
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	97,172	98,034
Single-issuer Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	43,378	42,016
Pooled Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	530	4,088
Fair Value, Measurements, Recurring [Member] | Single-issuer Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	43,400	42,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities Financial Institution [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Equity Securities	27,200	41,800
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Equity Securities	5,800	5,800
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Institutions Subordinated Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	49,700	50,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Single-issuer Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	39,600	38,200
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Corporate Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	3,500	1,900
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Single-issuer Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	3,800	3,800
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Pooled Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	500	4,100
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned (OREO)	12,800	12,000
Servicing Asset at Amortized Value, Fair Value	41,600	42,100
Trust for Benefit of Employees [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial assets	16,800	16,400
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial assets	1,200	1,300
Forward Contracts [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial assets	3,000	1,400
Other financial liabilities	72	1,200
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial assets	19,600	19,900
Other financial liabilities	19,600	19,900
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial liabilities	1,000	1,300
Trust for Benefit of Employees [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial liabilities	$ 16,800	$ 16,400

Common Stock Repurchase Plans (

Common Stock Repurchase Plans (Details) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended		6 Months Ended
	Apr. 30, 2015	Nov. 30, 2014	Jun. 30, 2015	Apr. 30, 2015	Jun. 30, 2014
Stockholders' Equity Note [Abstract]
Stock repurchase program, authorized amount	$ 50,000,000	$ 100,000,000		$ 50,000,000
Payments for repurchase of common stock		$ 100,000,000	$ 19,013,000		$ 49,804,000
Acquisition of treasury stock (in shares)	1.8	6.5	1.5	8.3
Share repurchase plan, percent of common shares outstanding, expected to be delivered		80.00%
Treasury stock aquired, average cost per share	$ 12.05		$ 12.36
Stock repurchase program, Number of shares authorized to be repurchased, percent of shares outstanding	2.30%

Subsequent Event (Details)

Subsequent Event (Details) - USD ($)	1 Months Ended
	Jul. 31, 2015	Jun. 30, 2015
Subordinated Debt
Subsequent Event [Line Items]
Debt instrument, face amount		$ 150,000,000
Debt instrument, term		10 years
Subordinated borrowing, interest rate		4.50%
Debt instrument, effective interest rate		4.70%
Junior Subordinated Debt | Fulton Capital Trust I | Subsequent Event
Subsequent Event [Line Items]
Subordinated borrowing, interest rate	6.29%
Debt instrument, effective interest rate	6.52%
Repayments of subordinated debt	$ 150,000,000
Loss on extinguishment of debt	$ 5,600,000