First Niagara Financial (FNFG) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 06, 2013
Entity Information [Line Items]	'	'
Entity Registrant Name	'FIRST NIAGARA FINANCIAL GROUP INC	'
Entity Central Index Key	'0001051741	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	353,969,354

Consolidated_Statements_of_Con

Consolidated Statements of Condition (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and cash equivalents	$558,086	$430,862
Investment securities:	'	'
Available for sale, at fair value (amortized cost of $7,485,106 and $10,658,220 in 2013 and 2012; includes pledged securities that can be sold or repledged of $299,854 and $585,967 in 2013 and 2012)	7,609,676	10,993,605
Held to maturity, at amortized cost (fair value of $3,839,863 and $1,373,971 in 2013 and 2012; includes pledged securities that can be sold or repledged of $405,150 and $31,139 in 2013 and 2012)	3,841,700	1,299,806
Federal Home Loan Bank and Federal Reserve Bank common stock, at amortized cost	437,534	420,277
Loans held for sale	80,468	154,745
Loans and leases (net of allowance for loan losses of $197,953 and $162,522 in 2013 and 2012)	20,891,118	19,547,490
Bank owned life insurance	413,555	404,321
Premises and equipment, net	417,878	410,561
Goodwill	2,448,506	2,483,787
Core deposit and other intangibles, net	101,425	134,023
Other assets	540,595	526,755
Total assets	37,340,541	36,806,232
Liabilities:	'	'
Deposits	26,969,002	27,676,531
Short-term borrowings	4,169,416	2,983,718
Long-term borrowings	732,547	732,425
Other	531,379	487,000
Total liabilities	32,402,344	31,879,674
Stockholders’ equity:	'	'
Preferred stock, $0.01 par value, 50,000,000 shares authorized; Series B, noncumulative perpetual preferred stock, $25 liquidation preference; 14,000,000 shares issued in 2013 and 2012	338,002	338,002
Common stock, $0.01 par value, 500,000,000 shares authorized; 366,002,045 shares issued in 2013 and 2012	3,660	3,660
Additional paid-in capital	4,231,720	4,230,574
Retained earnings	494,160	398,711
Accumulated other comprehensive income	52,085	157,303
Common stock held by employee stock ownership plan, 2,045,860 and 2,179,315 shares in 2013 and 2012	-16,892	-17,825
Treasury stock, at cost, 12,028,768 and 13,381,063 shares in 2013 and 2012	-164,538	-183,867
Total stockholders’ equity	4,938,197	4,926,558
Total liabilities and stockholders’ equity	$37,340,541	$36,806,232

Consolidated_Statements_of_Con1

Consolidated Statements of Condition (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Amortized cost for securities available for sale	$7,485,106	$10,658,220
Fair value of pledged securities that can be sold or repledged	299,854	585,967
Fair value for securities held-to-maturity	3,839,863	1,373,971
Amortized cost of pledged securities that can be sold or repledged	405,150	31,139
Allowance for credit losses on loans and leases	$197,953	$162,522
Preferred stock, par value (dollars per share)	$0.01	$0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	14,000,000	14,000,000
Liquidation preference (dollars per share)	$25	$25
Common stock, par value (dollars per share)	$0.01	$0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	366,002,045	366,002,045
Common stock held by employee stock ownership plan, shares	2,045,860	2,179,315
Treasury stock, shares	12,028,768	13,381,063

Consolidated_Statements_of_Inc

Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest income:	'	'	'	'
Loans and leases	$214,746	$211,767	$631,356	$601,877
Investment securities and other	91,996	90,101	269,067	290,612
Total interest income	306,742	301,868	900,423	892,489
Interest expense:	'	'	'	'
Deposits	12,931	18,358	40,175	49,747
Borrowings	16,271	13,905	47,135	71,753
Total interest expense	29,202	32,263	87,310	121,500
Net interest income	277,540	269,605	813,113	770,989
Provision for credit losses	27,600	22,200	73,000	70,300
Net interest income after provision for credit losses	249,940	247,405	740,113	700,689
Noninterest income:	'	'	'	'
Deposit service charges	27,115	26,422	78,397	64,892
Insurance commissions	17,854	18,764	51,901	52,669
Merchant and card fees	12,464	12,014	36,142	26,813
Wealth management services	15,189	11,069	42,979	29,315
Mortgage banking	2,268	10,974	15,574	23,797
Capital markets income	5,058	6,381	16,091	19,751
Lending and leasing	4,886	3,730	13,326	11,098
Bank owned life insurance	3,725	3,449	10,513	10,684
Gain on securities portfolio repositioning	0	5,337	0	21,232
Other	2,863	4,063	11,357	7,458
Total noninterest income	91,422	102,203	276,280	267,709
Noninterest expense:	'	'	'	'
Salaries and employee benefits	115,034	115,484	347,129	316,468
Occupancy and equipment	26,582	25,694	83,133	71,800
Technology and communications	28,999	28,110	85,715	72,257
Marketing and advertising	5,822	8,954	15,618	22,393
Professional services	9,820	11,193	29,205	29,351
Amortization of intangibles	7,702	14,506	32,671	30,811
Federal deposit insurance premiums	9,351	8,850	27,600	25,535
Merger and acquisition integration expenses	0	29,404	0	173,834
Restructuring charges	0	0	0	6,453
Other	27,883	24,347	82,958	63,457
Total noninterest expense	231,193	266,542	704,029	812,359
Income before income taxes	110,169	83,066	312,364	156,039
Income taxes	31,026	24,682	94,802	48,714
Net income	79,143	58,384	217,562	107,325
Preferred stock dividend	7,547	7,547	22,641	20,209
Net income available to common stockholders	$71,596	$50,837	$194,921	$87,116
Earnings per share:	'	'	'	'
Basic (dollars per share)	$0.20	$0.15	$0.55	$0.25
Diluted (dollars per share)	$0.20	$0.14	$0.55	$0.25
Weighted average common shares outstanding:	'	'	'	'
Basic	349,653	349,001	349,492	348,956
Diluted	350,896	349,371	350,368	349,248
Dividends per common share	$0.08	$0.08	$0.24	$0.24

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income	$79,143	$58,384	$217,562	$107,325
Securities available for sale:	'	'	'	'
Net unrealized (losses) gains arising during the period	-7,212	70,917	-96,224	106,371
Reclassification adjustment for realized gains included in net income	0	0	0	-9,798
Reclassification adjustment for net unrealized holding gains on securities transferred between available for sale and held to maturity during the period	0	0	-33,823	2,498
Net unrealized (losses) gains on securities available for sale, net of tax	-7,212	70,917	-130,047	99,071
Net unrealized holding gains on securities transferred between available for sale and held to maturity:	'	'	'	'
Reclassification adjustment for net unrealized holding gains on securities transferred	0	0	33,823	-2,498
Amortization of net unrealized holding gains to income during the period	-3,899	-422	-9,667	-1,262
Net unrealized holding (losses) gains on securities transferred during the period	-3,899	-422	24,156	-3,760
Net unrealized gains on interest rate swaps designated as cash flow hedges arising during the period	184	177	530	6,536
Pension and post-retirement plans:	'	'	'	'
Pension remeasurement	0	0	0	4,612
Amortization of net loss related to pension and post-retirement plans	48	223	143	544
Total pension and post-retirement plans	48	223	143	5,156
Total other comprehensive (loss) income	-10,879	70,895	-105,218	107,003
Total comprehensive income	$68,264	$129,279	$112,344	$214,328

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $)	Total	Preferred stock	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income	Common stock held by ESOP	Treasury stock
In Thousands
Beginning Balance at Dec. 31, 2011	$4,798,178	$338,002	$3,660	$4,228,477	$374,840	$67,812	($19,070)	($195,543)
Net income	107,325	'	'	'	107,325	'	'	'
Total other comprehensive income (loss), net	107,003	'	'	'	'	107,003	'	'
ESOP shares committed to be released (133,455 shares and 134,595 shares in 2013 and 2012, respectively)	953	'	'	13	'	'	940	'
Stock-based compensation expense	7,407	'	'	7,407	'	'	'	'
Net tax benefit (expense) from stock-based compensation	104	'	'	104	'	'	'	'
Restricted stock activity (1,352,295 shares and 798,106 shares in 2013 and 2012, respectively)	-1,335	'	'	-8,329	-4,347	'	'	11,341
Preferred stock dividends	-20,209	'	'	'	-20,209	'	'	'
Common stock dividends of $0.24 per share	-84,005	'	'	'	-84,005	'	'	'
Ending Balance at Sep. 30, 2012	4,915,421	338,002	3,660	4,227,672	373,604	174,815	-18,130	-184,202
Beginning Balance at Dec. 31, 2012	4,926,558	338,002	3,660	4,230,574	398,711	157,303	-17,825	-183,867
Net income	217,562	'	'	'	217,562	'	'	'
Total other comprehensive income (loss), net	-105,218	'	'	'	'	-105,218	'	'
ESOP shares committed to be released (133,455 shares and 134,595 shares in 2013 and 2012, respectively)	913	'	'	'	-20	'	933	'
Stock-based compensation expense	7,382	'	'	7,382	'	'	'	'
Net tax benefit (expense) from stock-based compensation	-779	'	'	-779	'	'	'	'
Restricted stock activity (1,352,295 shares and 798,106 shares in 2013 and 2012, respectively)	-1,289	'	'	-5,457	-15,161	'	'	19,329
Preferred stock dividends	-22,641	'	'	'	-22,641	'	'	'
Common stock dividends of $0.24 per share	-84,291	'	'	'	-84,291	'	'	'
Ending Balance at Sep. 30, 2013	$4,938,197	$338,002	$3,660	$4,231,720	$494,160	$52,085	($16,892)	($164,538)

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Statement of Stockholders' Equity [Abstract]	'	'
ESOP shares committed to be released	133,455	134,595
Restricted stock activity, shares	1,352,295	798,106
Common stock, dividend per share	$0.24	$0.24

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:	'	'
Net income	$217,562	$107,325
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Amortization (accretion) of fees and discounts, net	41,034	-4,030
Provision for credit losses	73,000	70,300
Depreciation of premises and equipment	40,030	30,905
Amortization of intangibles	32,671	30,811
Gain on securities portfolio repositioning	0	-21,232
Origination of loans held for sale	-1,113,338	-1,053,883
Proceeds from sales of loans held for sale	1,199,506	1,037,052
ESOP and stock based-compensation expense	8,295	8,360
Deferred income tax (benefit) expense	-3,348	18,362
Contributions to defined benefit pension plans	0	-110,575
Decrease (increase) in other assets	16,961	-40,023
Increase (decrease) in other liabilities	87,332	-65,877
Net cash provided by operating activities	599,705	7,495
Cash flows from investing activities:	'	'
Proceeds from sales of securities available for sale	478,352	3,170,966
Proceeds from maturities of securities available for sale	147,223	192,763
Principal payments received on securities available for sale	1,006,392	1,512,007
Purchases of securities available for sale	-1,460,637	-5,070,424
Principal payments received on securities held to maturity	697,058	400,909
Purchases of securities held to maturity	-225,426	0
Purchases of Federal Home Loan Bank and Federal Reserve Bank common stock	-17,257	-15,152
Net increase in loans and leases	-1,403,470	-1,183,896
Acquisitions, net of cash and cash equivalents	0	7,703,349
Purchases of premises and equipment	-51,411	-75,555
Other, net	-19,452	39,773
Net cash (used in) provided by investing activities	-848,628	6,674,740
Cash flows from financing activities:	'	'
Net decrease in deposits	-700,861	-1,627,490
Proceeds from (repayments of) short-term borrowings, net	1,185,698	-213,235
Repayments of long-term borrowings	-977	-5,126,447
Dividends paid on noncumulative preferred stock	-22,641	-20,209
Dividends paid on common stock	-84,291	-84,005
Other, net	-781	-317
Net cash provided by (used in) financing activities	376,147	-7,071,703
Net increase (decrease) in cash and cash equivalents	127,224	-389,468
Cash and cash equivalents at beginning of period	430,862	836,555
Cash and cash equivalents at end of period	558,086	447,087
Cash paid during the period for:	'	'
Income taxes	25,379	16,099
Interest expense	92,144	206,139
Acquisition of noncash assets and liabilities	'	'
Assets acquired	0	2,406,277
Liabilities assumed	0	10,109,626
Other noncash activity:	'	'
Securities transferred from available for sale to held to maturity (at fair value)	3,001,330	0
Securities available for sale purchased not settled	35,390	93,516
Securities held to maturity purchased not settled	16,385	0
Securities transferred from held to maturity to available for sale	$0	$860,674

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Acquisitions	'
	HSBC Bank Branches
	On May 18, 2012, the Bank acquired 137 full-service branches from HSBC Bank USA, National Association (“HSBC”) and its affiliates (the “HSBC Branch Acquisition”) in the Buffalo, Rochester, Syracuse, Albany, Downstate New York and Connecticut banking markets, as contemplated by the Purchase and Assumption Agreement, dated July 30, 2011, as amended and restated as of May 17, 2012. The purchase price, net of deposit premiums received of $122 million upon closing of the assignments from HSBC to KeyBank N.A. (“Key”), Five Star Bank (“Five Star”), and Community Bank System, Inc. (“Community Bank”), was $772 million. We also acquired certain wealth management relationships which included approximately $2.5 billion of assets under management. While the HSBC Branch Acquisition is considered a purchase of a business for accounting purposes, pro forma income statement information is not presented because the HSBC Branch Acquisition does not represent the acquisition of a business which has continuity both before and after the acquisition.
	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the date of acquisition:
	Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value:
	Cash and cash equivalents (1)	$	7,360,218
	Loans	1,599,712
	Core deposit and other intangibles	84,631
	Other assets	72,323
	Total assets acquired	9,116,884
	Deposits(2)	(9,854,589		)
	Other liabilities	(32,792		)
	Total liabilities assumed	(9,887,381		)
	Goodwill	$	770,497
	(1)	Amount is net of $772 million deposit premium paid to HSBC.
	(2)	Deposits reported exclude $0.5 billion in municipal deposits that were subject to a price concession.
	In connection with the regulatory process for the HSBC Branch Acquisition, we agreed with the U.S. Department of Justice to assign our purchase rights related to 26 HSBC branches in the Buffalo area. In January 2012, we entered into an agreement with Key assigning our right to purchase the 26 HSBC Buffalo branches as well as 11 additional HSBC branches in the Rochester area. On July 13, 2012, Key acquired these 37 branches with a total of $2.0 billion in deposits and approximately $256.5 million in loans, and paid us a deposit premium of $91.5 million.
	In January 2012, we also entered into separate agreements with Five Star Bank and Community Bank for them to purchase seven First Niagara branches and 20 HSBC branches, for which we had assigned our purchase rights.
	On June 22, 2012, Five Star acquired four First Niagara branches with $58.6 million in loans, assumed approximately $129.3 million in deposits, and paid us a deposit premium of $5.3 million. On August 17, 2012, Five Star acquired four of the HSBC branches, assumed approximately $18 million in loans, $157.2 million in deposits, and paid us a deposit premium of $6.5 million.
	On July 20, 2012, Community Bank acquired the remaining 16 HSBC branches, with a total of $107.0 million in loans, $696.6 million in deposits, and paid us a deposit premium of $23.8 million. On September 7, 2012, Community Bank acquired three First Niagara branches, assumed approximately $55.4 million in loans, $100.8 million in deposits, and paid us a deposit premium of $3.1 million.
	We estimated the fair value of loans acquired from HSBC by utilizing a methodology wherein similar loans were aggregated into pools. Cash flows for each pool were determined by estimating future credit losses and the rate of prepayments. Projected monthly cash flows were then discounted to present value based on a market rate for similar loans. There was no carryover of HSBC’s allowance for loan losses associated with the loans we acquired as the loans were initially recorded at fair value.
	Information about the acquired HSBC loan portfolio as of May 18, 2012 is in the following table, and excludes home equity lines of credit, credit card, and any other line of credit:
	Contractually required principal and interest at acquisition	$	758,449
	Contractual cash flows not expected to be collected (nonaccretable discount)	(16,497		)
	Expected cash flows at acquisition	741,952
	Interest component of expected cash flows (accretable discount)	(90,670		)
	Fair value of acquired loans (excluding lines of credit)	$	651,282
	The $41 million core deposit intangible asset recognized as part of the HSBC Branch Acquisition is being amortized over its estimated useful life of approximately three years using an accelerated method and the $9 million wealth management and $34 million purchased credit card relationships intangibles are being amortized over their useful lives of ten years using an accelerated method. The goodwill, which is not amortized for book purposes, was assigned to our banking segment and is deductible for tax purposes.
	The fair value of savings and transaction deposit accounts acquired from HSBC was assumed to approximate the carrying value as these accounts have no stated maturity and are payable on demand. Certificates of deposit were valued by projecting out the expected cash flows based on the remaining contractual terms of the certificate of deposit. These cash flows were discounted based on a market rate for a certificate of deposit with a corresponding remaining maturity.
	During the quarter ended March 31, 2013, we recorded a $36 million reduction to our goodwill balance related to the establishment of deferred tax assets in connection with the HSBC Branch Acquisition and our National City Bank branch acquisition.
	Direct costs related to the HSBC Branch Acquisition were expensed as incurred and amounted to $174 million for the nine months ended September 30, 2012. There were no such costs during the nine months ended September 30, 2013.

Investment_Securities

Investment Securities	9 Months Ended
	Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract]	'
Investment Securities	'
	Investment Securities
	The amortized cost, gross unrealized gains and losses, and fair value of our investment securities at the dates indicated are summarized as follows:
		Amortized		Unrealized			Unrealized			Fair
	30-Sep-13	cost		gains			losses			value
	Investment securities available for sale:
	Debt securities:
	States and political subdivisions	$	531,258	$	13,606		$	(320	)	$	544,544
	U.S. Treasury	19,956		555			—			20,511
	U.S. government agencies	4,181		7			(14		)	4,174
	U.S. government sponsored enterprises	317,836		8,229			(678		)	325,387
	Corporate	867,106		14,508			(16,726		)	864,888
	Trust preferred securities	5,966		—			(626		)	5,340
	Total debt securities	1,746,303		36,905			(18,364		)	1,764,844
	Mortgage-backed securities:
	Residential mortgage-backed securities:
	Government National Mortgage Association	43,352		777			(1,681		)	42,448
	Federal National Mortgage Association	145,427		4,845			(10		)	150,262
	Federal Home Loan Mortgage Corporation	167,114		4,502			—			171,616
	Collateralized mortgage obligations:
	Federal National Mortgage Association	817,057		552			(22,805		)	794,804
	Federal Home Loan Mortgage Corporation	403,730		777			(10,824		)	393,683
	Non-agency issued	15,513		728			(8		)	16,233
	Total collateralized mortgage obligations	1,236,300		2,057			(33,637		)	1,204,720
	Total residential mortgage-backed securities	1,592,193		12,181			(35,328		)	1,569,046
	Commercial mortgage-backed securities, non-agency issued	1,784,661		80,322			(1,867		)	1,863,116
	Total mortgage-backed securities	3,376,854		92,503			(37,195		)	3,432,162
	Collateralized loan obligations, non-agency issued	1,424,309		43,410			(1,594		)	1,466,125
	Asset-backed securities collateralized by:
	Student loans	311,532		6,363			(382		)	317,513
	Credit cards	73,051		380			(408		)	73,023
	Auto loans	333,248		3,812			(508		)	336,552
	Other	187,306		917			(1,067		)	187,156
	Total asset-backed securities	905,137		11,472			(2,365		)	914,244
	Other	32,503		57			(259		)	32,301
	Total securities available for sale	$	7,485,106	$	184,347		$	(59,777	)	$	7,609,676
	Investment securities held to maturity:
	Residential mortgage-backed securities:
	Government National Mortgage Association	$	18,333	$	222		$	(106	)	$	18,449
	Federal National Mortgage Association	154,141		180			(2,545		)	151,776
	Federal Home Loan Mortgage Corporation	85,975		203			(580		)	85,598
	Collateralized mortgage obligations:
	Government National Mortgage Association	1,459,691		34,950			(1,433		)	1,493,208
	Federal National Mortgage Association	1,105,058		1,116			(31,712		)	1,074,462
	Federal Home Loan Mortgage Corporation	1,018,502		18,753			(20,885		)	1,016,370
	Total collateralized mortgage obligations	3,583,251		54,819			(54,030		)	3,584,040
	Total securities held to maturity	$	3,841,700	$	55,424		$	(57,261	)	$	3,839,863
		Amortized		Unrealized			Unrealized			Fair
	31-Dec-12	cost		gains			losses			value
	Investment securities available for sale:
	Debt securities:
	States and political subdivisions	$	587,482	$	20,723		$	(144	)	$	608,061
	U.S. Treasury	19,944		763			—			20,707
	U.S. government agencies	4,641		13			(3		)	4,651
	U.S. government sponsored enterprises	390,421		13,471			—			403,892
	Corporate	811,720		28,390			(3,083		)	837,027
	Trust preferred securities	15,524		—			(1,329		)	14,195
	Total debt securities	1,829,732		63,360			(4,559		)	1,888,533
	Mortgage-backed securities:
	Residential mortgage-backed securities:
	Government National Mortgage Association	67,700		2,123			(197		)	69,626
	Federal National Mortgage Association	394,274		20,218			(30		)	414,462
	Federal Home Loan Mortgage Corporation	342,906		11,987			—			354,893
	Collateralized mortgage obligations:
Government National Mortgage Association	1,060,415		30,742			—			1,091,157
Federal National Mortgage Association	1,460,400		14,968			(940		)	1,474,428
Federal Home Loan Mortgage Corporation	1,036,308		11,204			(295		)	1,047,217
Non-agency issued	59,604		1,544			(25		)	61,123
Total collateralized mortgage obligations	3,616,727		58,458			(1,260		)	3,673,925
Total residential mortgage-backed securities	4,421,607		92,786			(1,487		)	4,512,906
Commercial mortgage-backed securities, non-agency issued	1,929,727		131,785			(1,291		)	2,060,221
Total mortgage-backed securities	6,351,334		224,571			(2,778		)	6,573,127
Collateralized loan obligations, non-agency issued	1,510,253		35,466			(854		)	1,544,865
Asset-backed securities collateralized by:
Student loans	377,923		11,952			(134		)	389,741
Credit cards	73,768		1,319			(12		)	75,075
Auto loans	366,501		5,708			(43		)	372,166
Other	117,885		781			(7		)	118,659
Total asset-backed securities	936,077		19,760			(196		)	955,641
Other	30,824		707			(92		)	31,439
Total securities available for sale	$	10,658,220	$	343,864		$	(8,479	)	$	10,993,605
Investment securities held to maturity:
Residential mortgage-backed securities:
Government National Mortgage Association	$	5,988	$	340		$	(28	)	$	6,300
Federal National Mortgage Association	5,223		168			—			5,391
Federal Home Loan Mortgage Corporation	6,753		326			—			7,079
Collateralized mortgage obligations:
Government National Mortgage Association	1,006,238		48,748			(91		)	1,054,895
Federal National Mortgage Association	18,463		657			—			19,120
Federal Home Loan Mortgage Corporation	257,141		24,045			—			281,186
Total collateralized mortgage obligations	1,281,842		73,450			(91		)	1,355,201
Total securities held to maturity	$	1,299,806	$	74,284		$	(119	)	$	1,373,971
The table below details certain information regarding our investment securities that were in an unrealized loss position at the dates indicated by the length of time those securities were in a continuous loss position:
	Less than 12 months								12 months or longer						Total
	Fair		Unrealized						Fair		Unrealized				Fair		Unrealized
30-Sep-13	value		losses			Count			value		losses			Count	value		losses			Count
Investment securities available for sale:
Debt securities:
States and political subdivisions	$	27,131	$	(313	)	46			$	274	$	(7	)	1	$	27,405	$	(320	)	47
U.S. government agencies	—		—			—			2,136		(14		)	3	2,136		(14		)	3
U.S. government sponsored enterprises	69,974		(678		)	6			—		—			—	69,974		(678		)	6
Corporate	354,076		(15,403		)	242			39,430		(1,323		)	11	393,506		(16,726		)	253
Trust preferred securities	—		—			—			5,340		(626		)	3	5,340		(626		)	3
Total debt securities	451,181		(16,394		)	294			47,180		(1,970		)	18	498,361		(18,364		)	312
Mortgage-backed securities:
Residential mortgage-backed securities:
Government National Mortgage Association	19,648		(1,681		)	6			—		—			—	19,648		(1,681		)	6
Federal National Mortgage Association	707		(10		)	7			—		—			—	707		(10		)	7
Collateralized mortgage obligations:
Federal National Mortgage Association	683,277		(22,805		)	37			—		—			—	683,277		(22,805		)	37
Federal Home Loan Mortgage Corporation	373,987		(10,824		)	18			—		—			—	373,987		(10,824		)	18
Non-agency issued	1,138		(8		)	4			—		—			—	1,138		(8		)	4
Total collateralized mortgage obligations	1,058,402		(33,637		)	59			—		—			—	1,058,402		(33,637		)	59
Total residential mortgage-backed securities	1,078,757		(35,328		)	72			—		—			—	1,078,757		(35,328		)	72
Commercial mortgage-backed securities, non-agency issued	144,576		(1,852		)	18			1,868		(15		)	1	146,444		(1,867		)	19
Total mortgage-backed securities	1,223,333		(37,180		)	90			1,868		(15		)	1	1,225,201		(37,195		)	91
Collateralized loan obligations, non-agency issued	177,557		(1,594		)	21			—		—			—	177,557		(1,594		)	21
Asset-backed securities collateralized by:
Student loans	65,470		(382		)	9			—		—			—	65,470		(382		)	9
Credit card	36,079		(408		)	4			—		—			—	36,079		(408		)	4
Auto loans	37,187		(508		)	9			—		—			—	37,187		(508		)	9
Other	73,477		(1,066		)	12			87		(1		)	1	73,564		(1,067		)	13
Total asset-backed securities	212,213		(2,364		)	34			87		(1		)	1	212,300		(2,365		)	35
Other	22,181		(259		)	5			—		—			—	22,181		(259		)	5
Total securities available for sale in an unrealized loss position	$	2,086,465	$	(57,791	)	444			$	49,135	$	(1,986	)	20	$	2,135,600	$	(59,777	)	464
	Less than 12 months								12 months or longer						Total
	Fair		Unrealized						Fair		Unrealized				Fair		Unrealized
30-Sep-13	value		losses			Count			value		losses			Count	value		losses			Count
Investment securities held to maturity:
Residential mortgage-backed securities:
Government National Mortgage Association	$	11,287	$	(106	)	4			$	—	$	—		—	$	11,287	$	(106	)	4
Federal National Mortgage Association	138,981		(2,545		)	39			—		—			—	138,981		(2,545		)	39
Federal Home Loan Mortgage Corporation	68,468		(580		)	18			—		—			—	68,468		(580		)	18
Collateralized mortgage obligation:
Government National Mortgage Association	104,281		(1,433		)	14			—		—			—	104,281		(1,433		)	14
Federal National Mortgage Association	913,806		(31,712		)	50			—		—			—	913,806		(31,712		)	50
Federal Home Loan Mortgage Corporation	609,355		(20,885		)	41			—		—			—	609,355		(20,885		)	41
Total collateralized mortgage obligations	1,627,442		(54,030		)	105			—		—			—	1,627,442		(54,030		)	105
Total securities held to maturity in an unrealized loss position	$	1,846,178	$	(57,261	)	166			$	—	$	—		—	$	1,846,178	$	(57,261	)	166
	Less than 12 months								12 months or longer						Total
	Fair		Unrealized						Fair		Unrealized				Fair		Unrealized
31-Dec-12	value		losses			Count			value		losses			Count	value		losses			Count
Investment securities available for sale:
Debt securities:
States and political subdivisions	$	21,373	$	(98	)	42			$	4,311	$	(46	)	5	$	25,684	$	(144	)	47
U.S. government agencies	—		—			—			2,237		(3		)	2	2,237		(3		)	2
Corporate	92,190		(2,168		)	27			44,085		(915		)	2	136,275		(3,083		)	29
Trust preferred securities	1,005		(13		)	1			13,190		(1,316		)	6	14,195		(1,329		)	7
Total debt securities	114,568		(2,279		)	70			63,823		(2,280		)	15	178,391		(4,559		)	85
Mortgage-backed securities:
Residential mortgage-backed securities:
Government National Mortgage Association	22,604		(197		)	6			—		—			—	22,604		(197		)	6
Federal National Mortgage Association	1,244		(22		)	7			315		(8		)	2	1,559		(30		)	9
Collateralized mortgage obligations:
Federal National Mortgage Association	232,290		(940		)	12			—		—			—	232,290		(940		)	12
Federal Home Loan Mortgage Corporation	118,020		(295		)	6			—		—			—	118,020		(295		)	6
Non-agency issued	—		—			—			4,123		(25		)	1	4,123		(25		)	1
Total collateralized mortgage obligations	350,310		(1,235		)	18			4,123		(25		)	1	354,433		(1,260		)	19
Total residential mortgage-backed securities	374,158		(1,454		)	31			4,438		(33		)	3	378,596		(1,487		)	34
Commercial mortgage-backed securities, non-agency issued	29,660		(613		)	5			31,567		(678		)	4	61,227		(1,291		)	9
Total mortgage-backed securities	403,818		(2,067		)	36			36,005		(711		)	7	439,823		(2,778		)	43
Collateralized loan obligations, non-agency issued	167,997		(854		)	25			—		—			—	167,997		(854		)	25
Asset-backed securities collateralized by:
Student loans	2,055		(53		)	1			25,641		(81		)	1	27,696		(134		)	2
Credit cards	5,987		(12		)	2			—		—			—	5,987		(12		)	2
Auto loans	41,605		(43		)	7			—		—			—	41,605		(43		)	7
Other	4,500		(3		)	2			97		(4		)	1	4,597		(7		)	3
Total asset-backed securities	54,147		(111		)	12			25,738		(85		)	2	79,885		(196		)	14
Other	—		—			—			7,936		(92		)	3	7,936		(92		)	3
Total securities available for sale in an unrealized loss position	$	740,530	$	(5,311	)	143			$	133,502	$	(3,168	)	27	$	874,032	$	(8,479	)	170
Investment securities held to maturity:
Residential mortgage-backed securities:
Government National Mortgage Association	$	1,959	$	(28	)	1			$	—	$	—		—	$	1,959	$	(28	)	1
Collateralized mortgage obligations:
Government National Mortgage Association	23,485		(91		)	2			—		—			—	23,485		(91		)	2
Total securities held to maturity in an unrealized loss position	$	25,444	$	(119	)	3			$	—	$	—		—	$	25,444	$	(119	)	3
We have assessed the securities in an unrealized loss position at September 30, 2013 and December 31, 2012 and determined that the declines in fair value below amortized cost were temporary. We also do not intend to sell these securities and it is not more likely than not that we will be required to sell these securities before the recovery of their amortized cost bases, which may be at maturity.
Scheduled contractual maturities of our investment securities at September 30, 2013 were as follows:
	Amortized cost		Fair value
Debt securities:
Within one year	$	224,911	$	227,171
After one year through five years	899,393		925,249
After five years through ten years	601,962		593,531
After ten years	20,037		18,893
Total debt securities	1,746,303		1,764,844
Mortgage-backed securities	7,218,554		7,272,025
Collateralized loan obligations	1,424,309		1,466,125
Asset-backed securities	905,137		914,244
Other	32,503		32,301
	$	11,326,806	$	11,449,539
While the contractual maturities of our mortgage-backed securities, collateralized loan obligations, asset-backed securities, and other securities generally exceed ten years, we expect the effective lives to be significantly shorter due to prepayments of the underlying loans and the nature of these securities. The duration of our investment securities portfolio increased to 3.2 years at September 30, 2013 from 2.4 years at December 31, 2012.
On March 29, 2013, we transferred $3 billion of residential mortgage-backed securities from available for sale to held to maturity. The amortized cost, unrealized gains and losses, and fair value of these transferred investment securities immediately prior to the transfer are as follows:
	Amortized		Unrealized			Unrealized			Fair
	cost		gains			losses			value
Residential mortgage-backed securities:
Government National Mortgage Association	$	14,615	$	748		$	—		$	15,363
Federal National Mortgage Association	173,196		11,716			(15		)	184,897
Federal Home Loan Mortgage Corporation	96,468		5,224			—			101,692
Collateralized mortgage obligations:
Government National Mortgage Association	884,677		25,759			—			910,436
Federal National Mortgage Association	1,019,254		9,244			(2,703		)	1,025,795
Federal Home Loan Mortgage Corporation	758,248		6,664			(1,765		)	763,147
Total collateralized mortgage obligations	2,662,179		41,667			(4,468		)	2,699,378
Total residential mortgage-backed securities	$	2,946,458	$	59,355		$	(4,483	)	$	3,001,330

Loans_and_Leases

Loans and Leases	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Loans and Leases	'
	Loans and Leases
	Overall Portfolio
	Our loan portfolio is made up of two segments, commercial loans and consumer loans. Those segments are further segregated between our loans initially accounted for under the amortized cost method (referred to as “originated” loans) and loans acquired (referred to as “acquired” loans). Our commercial loan portfolio segment includes both business and commercial real estate loans. Our consumer portfolio segment includes residential real estate, home equity, and other consumer loans.
	Our loans and leases receivable consisted of the following at the dates indicated:
		30-Sep-13										31-Dec-12
		Originated			Acquired			Total				Originated			Acquired			Total
	Commercial:
	Real estate	$	5,321,251		$	1,566,576		$	6,887,827			$	4,491,440		$	1,974,607		$	6,466,047
	Construction	772,362			37,218			809,580				552,265			74,881			627,146
	Business	4,741,050			463,622			5,204,672				4,286,331			666,992			4,953,323
	Total commercial	10,834,663			2,067,416			12,902,079				9,330,036			2,716,480			12,046,516
	Consumer:
	Residential real estate	1,882,628			1,636,605			3,519,233				1,724,134			2,037,433			3,761,567
	Home equity	1,536,935			1,169,668			2,706,603				1,286,243			1,365,648			2,651,891
	Indirect auto	1,339,449			—			1,339,449				601,456			—			601,456
	Credit cards	311,600			—			311,600				215,001			99,972			314,973
	Other consumer	306,230			3,877			310,107				215,487			118,122			333,609
	Total consumer	5,376,842			2,810,150			8,186,992				4,042,321			3,621,175			7,663,496
	Total loans and leases	16,211,505			4,877,566			21,089,071				13,372,357			6,337,655			19,710,012
	Allowance for loan losses	(194,992		)	(2,961		)	(197,953		)		(160,958		)	(1,564		)	(162,522		)
	Total loans and leases, net	$	16,016,513		$	4,874,605		$	20,891,118			$	13,211,399		$	6,336,091		$	19,547,490
	As of September 30, 2013, we had a liability for unfunded loan commitments of $13 million. For the nine months ended September 30, 2013, we recognized provision for credit losses related to our unfunded loan commitments of $1.2 million.
	Of the $2.7 billion home equity portfolio at both September 30, 2013 and December 31, 2012, $1.0 billion and $0.9 billion were in a first lien position at the respective period ends. We hold or service the first lien loan for approximately 10% of the remainder of the home equity portfolio that was in a second lien position as of September 30, 2013 and December 31, 2012.
	Acquired loan portfolios
	We have acquired loans in four acquisitions since January 1, 2009. All acquired loans were initially measured at fair value and subsequently accounted for under either Accounting Standards Codification Topic (“ASC”) 310-30 (Loans and Debt Securities Acquired with Deteriorated Credit Quality) or ASC 310-20 (Nonrefundable Fees and Other Costs.)
	The outstanding principal balance and the related carrying amount of our acquired loans included in our Consolidated Statements of Condition are as follows at the dates indicated:
		September 30,			December 31,
		2013			2012
	Credit impaired acquired loans evaluated individually for future credit losses
	Outstanding principal balance	$	20,286		$	31,032
	Carrying amount	13,800			24,157
	Acquired loans evaluated collectively for future credit losses
	Outstanding principal balance	3,602,822			4,773,965
	Carrying amount	3,533,103			4,690,143
	Other acquired loans
	Outstanding principal balance	1,381,794			1,695,979
	Carrying amount	1,330,663			1,623,355
	Total acquired loans
	Outstanding principal balance	5,004,902			6,500,976
	Carrying amount	4,877,566			6,337,655
	The following table presents changes in the accretable yield, which includes income recognized from contractual interest cash flows, for the dates indicated. Acquired lines of credit accounted for under ASC 310-20 are not included in this table.
	Balance at January 1, 2012	$	(1,186,900	)
	HSBC acquisition	(90,670		)
	Net reclassifications from nonaccretable yield	(28,095		)
	Accretion	248,533
	Balance at December 31, 2012	(1,057,132		)
	Reclassifications from nonaccretable yield	(14,362		)
	Accretion	156,497
	Other (1)	21,722
	Balance at September 30, 2013	$	(893,275	)
	(1)	Includes changes in expected cash flows from changes in interest rate and prepayment assumptions.
	During the first quarter of 2013, we reduced our estimate of future cash flows on acquired loans to reflect our current outlook for prepayment speeds on these balances.  The increase in prepayment speed assumptions reduced our accretable discount by $21.7 million.  This change did not materially impact our interest income or net interest margin in 2013.
	Allowance for loan losses
	We establish our allowance for loan losses through a provision for credit losses based on our evaluation of the credit quality of our loan portfolio. We determined our allowance for loan losses by portfolio segment as defined above. For our originated loans, our allowance for loan losses consists of the following elements: (i) specific valuation allowances based on probable losses on specifically identified impaired loans; and (ii) valuation allowances based on net historical loan loss experience for similar loans with similar inherent risk characteristics and performance trends, adjusted, as appropriate for qualitative risk factors specific to respective loan types.
	We also maintain an allowance for loan losses on acquired loans when: (i) for loans accounted for under ASC 310-30, there is deterioration in credit quality subsequent to acquisition, and (ii) for loans accounted for under ASC 310-20, the inherent losses in the loans exceed the remaining credit discount recorded at the time of acquisition.
	The following table presents the activity in our allowance for loan losses on originated loans and related recorded investment of the associated loans in our originated loan portfolio segment for the periods indicated:
		Commercial							Consumer
	Originated loans	Real estate			Business				Residential			Home equity			Other			Total
															consumer
	Nine months ended September 30, 2013
	Allowance for loan losses:
	Balance at beginning of period	$	37,550		$	99,188			$	4,515		$	4,716		$	14,989		$	160,958
	Provision for loan losses	5,637			41,897				(1,552		)	2,981			19,298			68,261
Charge-offs	(6,103		)	(23,477		)		(1,256		)	(2,072		)	(10,010		)	(42,918		)
Recoveries	3,851			1,706				401			232			2,501			8,691
Balance at end of period	$	40,935		$	119,314			$	2,108		$	5,857		$	26,778		$	194,992
Allowance for loan losses:
Individually evaluated for impairment	$	1,744		$	4,587			$	1,084		$	2,439		$	68		$	9,922
Collectively evaluated for impairment	39,191			114,727				1,024			3,418			26,710			185,070
Total	$	40,935		$	119,314			$	2,108		$	5,857		$	26,778		$	194,992
Loans receivable:
Balance at end of period
Individually evaluated for impairment	$	81,934		$	57,916			$	20,483		$	6,007		$	3,627		$	169,967
Collectively evaluated for impairment	6,011,679			4,683,134				1,862,145			1,530,928			1,953,652			16,041,538
Total	$	6,093,613		$	4,741,050			$	1,882,628		$	1,536,935		$	1,957,279		$	16,211,505
Nine months ended September 30, 2012
Allowance for loan losses:
Balance at beginning of period	$	50,007		$	57,348			$	4,101		$	4,374		$	2,362		$	118,192
Provision for loan losses	(8,021		)	56,634				2,409			2,604			8,669			62,295
Charge-offs	(5,518		)	(23,131		)		(1,965		)	(3,508		)	(3,035		)	(37,157		)
Recoveries	556			1,954				294			411			1,171			4,386
Allowance related to loans sold	(88		)	(187		)		(66		)	(121		)	(45		)	(507		)
Balance at end of period	$	36,936		$	92,618			$	4,773		$	3,760		$	9,122		$	147,209
Allowance for loan losses:
Individually evaluated for impairment	$	2,047		$	5,090			$	2,373		$	360		$	21		$	9,891
Collectively evaluated for impairment	34,889			87,528				2,400			3,400			9,101			137,318
Total	$	36,936		$	92,618			$	4,773		$	3,760		$	9,122		$	147,209
Loans receivable:
Balance at end of period
Individually evaluated for impairment	$	62,708		$	47,947			$	17,756		$	4,738		$	1,511		$	134,660
Collectively evaluated for impairment	4,644,029			3,833,198				1,684,031			1,226,818			709,832			12,097,908
Total	$	4,706,737		$	3,881,145			$	1,701,787		$	1,231,556		$	711,343		$	12,232,568
	Commercial							Consumer
Originated loans	Real estate			Business				Residential			Home equity			Other			Total
														consumer
Three months ended September 30, 2013
Allowance for loan losses:
Balance at beginning of period	$	43,258		$	106,597			$	2,630		$	5,505		$	24,460		$	182,450
Provision for loan losses	(3,327		)	22,411				(385		)	674			6,059			25,432
Charge-offs	(2,312		)	(10,163		)		(161		)	(395		)	(4,799		)	(17,830		)
Recoveries	3,316			469				24			73			1,058			4,940
Balance at end of period	$	40,935		$	119,314			$	2,108		$	5,857		$	26,778		$	194,992
Three months ended September 30, 2012
Allowance for loan losses:
Balance at beginning of period	$	44,927		$	75,708			$	5,076		$	4,971		$	4,514		$	135,196
Provision for loan losses	(6,536		)	23,147				107			(771		)	5,446			21,393
Charge-offs	(1,508		)	(6,500		)		(410		)	(545		)	(1,179		)	(10,142		)
Recoveries	123			424				14			145			368			1,074
Allowance related to loans sold	(70		)	(161		)		(14		)	(40		)	(27		)	(312		)
Balance at end of period	$	36,936		$	92,618			$	4,773		$	3,760		$	9,122		$	147,209
The following table presents the activity in our allowance for loan losses and related recorded investment of the associated loans in our acquired loan portfolio for the periods indicated:
	Commercial							Consumer
Acquired loans	Real estate			Business				Residential			Home equity			Other			Total
														consumer
Nine months ended September 30, 2013
Allowance for loan losses:
Balance at beginning of period	$	—		$	—			$	60		$	290		$	1,214		$	1,564
Provision for loan losses	1,724			—				859			1,700			(744		)	3,539
Charge-offs	(1,772		)	—				—			—			(547		)	(2,319		)
Recoveries	100			—				—			—			77			177
Balance at end of period	$	52		$	—			$	919		$	1,990		$	—		$	2,961
Allowance for loan losses:
Individually evaluated for impairment	$	—		$	—			$	—		$	—		$	—		$	—
Collectively evaluated for impairment	52			—				919			1,990			—			2,961
Total	$	52		$	—			$	919		$	1,990		$	—		$	2,961
Loans receivable:
Balance at end of period
Individually evaluated for impairment	$	999		$	9,430			$	—		$	3,324		$	—		$	13,753
Collectively evaluated for impairment	—			338,788				—			975,244			3,877			1,317,909
Loans acquired with deteriorated credit quality	1,602,795			115,404				1,636,605			191,100			—			3,545,904
Total	$	1,603,794		$	463,622			$	1,636,605		$	1,169,668		$	3,877		$	4,877,566
Nine months ended September 30, 2012
Allowance for loan losses:
Balance at beginning of period	$	—		$	—			$	60		$	50		$	1,798		$	1,908
Provision for loan losses	5,208			—				—			—			2,000			7,208
Charge-offs	(5,467		)	—				—			—			(1,359		)	(6,826		)
Recoveries	259			—				—			—			175			434
Balance at end of period	$	—		$	—			$	60		$	50		$	2,614		$	2,724
Allowance for loan losses:
Individually evaluated for impairment	$	—		$	—			$	—		$	—		$	—		$	—
Collectively evaluated for impairment	—			—				60			50			2,614			2,724
Total	$	—		$	—			$	60		$	50		$	2,614		$	2,724
Loans receivable:
Balance at end of period
Individually evaluated for impairment	$	1,356		$	7,998			$	—		$	2,341		$	—		$	11,695
Collectively evaluated for impairment	—			534,204				—			1,072,200			252,718			1,859,122
Loans acquired with deteriorated credit quality	2,127,878			258,807				2,168,969			355,332			92,155			5,003,141
Total	$	2,129,234		$	801,009			$	2,168,969		$	1,429,873		$	344,873		$	6,873,958
	Commercial							Consumer
Acquired loans	Real estate			Business				Residential			Home equity			Other			Total
														consumer
Three months ended September 30, 2013
Allowance for loan losses:
Balance at beginning of period	$	42		$	—			$	60		$	290		$	866		$	1,258
Provision for loan losses	—			—				859			1,700			(791		)	1,768
Charge-offs	—			—				—			—			(106		)	(106		)
Recoveries	10			—				—			—			31			41
Balance at end of period	$	52		$	—			$	919		$	1,990		$	—		$	2,961
Three months ended September 30, 2012
Allowance for loan losses:
Balance at beginning of period	$	—		$	—			$	60		$	50		$	3,210		$	3,320
Provision for loan losses	407			—				—			—			—			407
Charge-offs	(468		)	—				—			—			(658		)	(1,126		)
Recoveries	61			—				—			—			62			123
Balance at end of period	$	—		$	—			$	60		$	50		$	2,614		$	2,724
Credit Quality
We monitor credit quality as indicated by various factors and utilize such information in our evaluation of the adequacy of the allowance for loan losses. The following sections discuss the various credit quality indicators that we consider.
Nonperforming loans
Our nonperforming loans consisted of the following at the dates indicated:
	September 30, 2013										December 31, 2012
	Originated			Acquired			Total				Originated			Acquired			Total
Commercial:
Real estate	$	51,302		$	998		$	52,300			$	50,848		$	1,120		$	51,968
Business	35,854			11,172			47,026				47,066			8,932			55,998
Total commercial	87,156			12,170			99,326				97,914			10,052			107,966
Consumer:
Residential real estate	31,312			—			31,312				27,192			—			27,192
Home equity	15,709			17,901			33,610				14,233			19,205			33,438
Other consumer	10,667			317			10,984				3,737			391			4,128
Total consumer	57,688			18,218			75,906				45,162			19,596			64,758
Total	$	144,844		$	30,388		$	175,232			$	143,076		$	29,648		$	172,724
The table below provides information about the interest income that would have been recognized if our nonperforming loans had performed in accordance with terms for the periods indicated:
	Three months ended							Nine months ended
	September 30,							September 30,
	2013			2012				2013			2012
Additional interest income that would have been recorded if nonperforming loans had performed in accordance with original terms	$	1,860		$	2,157			$	5,398		$	5,287
Impaired loans
The following table provides information about our impaired originated loans including ending recorded investment, principal balance, and related allowance amount at the dates indicated. Loans with no related allowance for loan losses have adequate collateral securing their carrying value and in some circumstances have been charged down to their current carrying value based on the fair value of the collateral. The carrying value of our impaired loans, less any related allowance for loan losses, was 68% and 67% of the loans’ contractual principal balance at September 30, 2013 and December 31, 2012, respectively.
	30-Sep-13										31-Dec-12
Originated loans	Recorded			Unpaid			Related				Recorded			Unpaid			Related
	investment			principal			allowance				investment			principal			allowance
				balance										balance
With no related allowance recorded:
Commercial:
Real estate	$	62,495		$	84,613		$	—			$	41,964		$	54,926		$	—
Business	47,215			71,313			—				34,336			57,442			—
Total commercial	109,710			155,926			—				76,300			112,368			—
Consumer:
Residential real estate	15,573			18,762			—				6,315			6,473			—
Home equity	1,102			1,328			—				2,992			3,406			—
Other consumer	1,844			2,190			—				1,830			1,924			—
Total consumer	18,519			22,280			—				11,137			11,803			—
Total	$	128,229		$	178,206		$	—			$	87,437		$	124,171		$	—
With a related allowance recorded
Commercial:
Real estate	$	19,439		$	24,379		$	1,744			$	24,550		$	37,037		$	2,640
Business	10,701			20,190			4,587				23,873			31,271			4,755
Total commercial	30,140			44,569			6,331				48,423			68,308			7,395
Consumer:
Residential real estate	4,910			5,651			1,084				13,191			13,918			3,074
Home equity	4,905			5,664			2,439				2,406			2,583			801
Other consumer	1,783			1,963			68				79			99			10
Total consumer	11,598			13,278			3,591				15,676			16,600			3,885
Total	$	41,738		$	57,847		$	9,922			$	64,099		$	84,908		$	11,280
Total
Commercial:
Real estate	$	81,934		$	108,992		$	1,744			$	66,514		$	91,963		$	2,640
Business	57,916			91,503			4,587				58,209			88,713			4,755
Total commercial	139,850			200,495			6,331				124,723			180,676			7,395
Consumer:
Residential real estate	20,483			24,413			1,084				19,506			20,391			3,074
Home equity	6,007			6,992			2,439				5,398			5,989			801
Other consumer	3,627			4,153			68				1,909			2,023			10
Total consumer	30,117			35,558			3,591				26,813			28,403			3,885
Total	$	169,967		$	236,053		$	9,922			$	151,536		$	209,079		$	11,280
The following table provides information about our impaired acquired loans with no related allowance at the dates indicated. The remaining credit mark is considered adequate to cover any loss on these balances.
	30-Sep-13										31-Dec-12
Acquired loans	Recorded			Unpaid			Related				Recorded			Unpaid principal balance			Related
	investment			principal			allowance				investment						allowance
				balance
Commercial:
Real estate	$	999		$	4,447		$	—			$	1,130		$	4,652		$	—
Business	9,430			10,293			—				6,656			7,436			—
Total commercial	10,429			14,740			—				7,786			12,088			—
Consumer:
Residential real estate	—			—			—				—			—			—
Home equity	3,324			4,413			—				2,345			3,470			—
Other consumer	—			—			—				17			17			—
Total consumer	3,324			4,413			—				2,362			3,487			—
Total(1)	$	13,753		$	19,153		$	—			$	10,148		$	15,575		$	—
(1)Includes nonaccrual purchased credit impaired loans.
The following table provides information about our impaired originated loans including the average recorded investment and interest income recognized on impaired loans for the periods indicated:
	September 30,
	2013							2012
Originated loans	Average			Interest				Average			Interest
	recorded			income				recorded			income
	investment			recognized				investment			recognized
Nine months ended
Commercial:
Real estate	$	88,046		$	1,213			$	67,480		$	1,112
Business	59,391			689				49,318			597
Total commercial	147,437			1,902				116,798			1,709
Consumer:
Residential real estate	23,421			352				14,102			340
Home equity	6,096			47				2,558			74
Other consumer	3,836			33				556			31
Total consumer	33,353			432				17,216			445
Total	$	180,790		$	2,334			$	134,014		$	2,154
Three months ended
Commercial:
Real estate	$	87,903		$	410			$	63,721		$	548
Business	60,077			293				42,807			315
Total commercial	147,980			703				106,528			863
Consumer:
Residential real estate	20,755			182				17,789			134
Home equity	6,091			18				4,825			43
Other consumer	3,072			24				1,512			30
Total consumer	29,918			224				24,126			207
Total	$	177,898		$	927			$	130,654		$	1,070
The following table provides information about our impaired acquired loans including the average recorded investment and interest income recognized on impaired loans for the periods indicated:
	September 30,
	2013							2012
Acquired loans	Average			Interest				Average			Interest
	recorded			income				recorded			income
	investment			recognized				investment			recognized
Nine months ended
Commercial:
Real estate	$	1,139		$	—			$	1,605		$	—
Business	9,532			—				8,375			—
Total commercial	10,671			—				9,980			—
Consumer:
Residential real estate	—			—				—			—
Home equity	3,336			3				780			26
Other consumer	—			—				—			—
Total consumer	3,336			3				780			26
Total(1)	$	14,007		$	3			$	10,760		$	26
Three months ended
Commercial:
Real estate	$	1,065		$	—			$	678		$	—
Business	8,020			—				5,423			—
Total commercial	9,085			—				6,101			—
Consumer:
Residential real estate	—			—				—			—
Home equity	3,265			1				2,341			26
Other consumer	—			—				—			—
Total consumer	3,265			1				2,341			26
Total(1)	$	12,350		$	1			$	8,442		$	26
-1	Included nonaccrual purchased credit impaired loans.
Period end nonaccrual loans differed from the amount of total impaired loans as certain TDRs, which are considered impaired loans, were accruing interest because the borrower demonstrated its ability to satisfy the terms of the restructured loan for at least six consecutive payments. Also contributing to the difference are nonaccrual commercial loans less than $200 thousand and nonaccrual consumer loans, which are not considered impaired unless they have been modified in a TDR as they are evaluated collectively when determining the allowance for loan losses.
The following table is a reconciliation between nonaccrual loans and impaired loans at the dates indicated:
	Commercial			Consumer			Total
30-Sep-13
Nonaccrual loans	$	99,326		$	75,906		$	175,232
Plus: Accruing TDRs	61,893			7,984			69,877
Less: Smaller balance nonaccrual loans evaluated collectively when determining the allowance for loan losses	(10,940		)	(50,449		)	(61,389		)
Total impaired loans(1)	$	150,279		$	33,441		$	183,720
December 31, 2012:
Nonaccrual loans	$	107,966		$	64,758		$	172,724
Plus: Accruing TDRs	36,380			9,900			46,280
Less: Smaller balance nonaccrual loans evaluated collectively when determining the allowance for loan losses	(11,837		)	(45,483		)	(57,320		)
Total impaired loans(1)	$	132,509		$	29,175		$	161,684
(1)	Includes nonaccrual purchased credit impaired loans.
Credit Quality Indicators
The primary indicators of credit quality are delinquency status and our internal loan gradings for our commercial loan portfolio segment and delinquency status and current FICO scores for our consumer loan portfolio segment.
The following tables contain an aging analysis of our loans by class at the dates indicated:
	30-59 days			60-89 days			Greater than			Total			Current			Total loans			Greater than
	past due			past due			90 days			past due						receivable			90 days
							past due												and accruing (1)
30-Sep-13
Originated loans
Commercial:
Real estate	$	5,590		$	878		$	33,865		$	40,333		$	6,053,280		$	6,093,613		$	—
Business	8,094			5,135			23,232			36,461			4,704,589			4,741,050			27
Total commercial	13,684			6,013			57,097			76,794			10,757,869			10,834,663			27
Consumer:
Residential real estate	6,597			1,732			21,584			29,913			1,852,715			1,882,628			—
Home equity	3,413			1,688			10,685			15,786			1,521,149			1,536,935			—
Other consumer	11,827			4,021			7,513			23,361			1,933,918			1,957,279			2,407
Total consumer	21,837			7,441			39,782			69,060			5,307,782			5,376,842			2,407
Total	$	35,521		$	13,454		$	96,879		$	145,854		$	16,065,651		$	16,211,505		$	2,434
Acquired loans
Commercial:
Real estate	$	8,523		$	5,249		$	58,229		$	72,001		$	1,531,793		$	1,603,794		$	57,231
Business	5,575			418			10,638			16,631			446,991			463,622			5,165
Total commercial	14,098			5,667			68,867			88,632			1,978,784			2,067,416			62,396
Consumer:
Residential real estate	19,876			10,261			65,985			96,122			1,540,483			1,636,605			65,985
Home equity	7,459			2,761			18,507			28,727			1,140,941			1,169,668			5,433
Other consumer	439			146			317			902			2,975			3,877			—
Total consumer	27,774			13,168			84,809			125,751			2,684,399			2,810,150			71,418
Total	$	41,872		$	18,835		$	153,676		$	214,383		$	4,663,183		$	4,877,566		$	133,814
31-Dec-12
Originated loans
Commercial:
Real estate	$	4,346		$	2,584		$	40,454		$	47,384		$	4,996,321		$	5,043,705		$	3,791
Business	5,398			4,698			19,237			29,333			4,256,998			4,286,331			315
Total commercial	9,744			7,282			59,691			76,717			9,253,319			9,330,036			4,106
Consumer:
Residential real estate	7,590			2,414			19,241			29,245			1,694,889			1,724,134			—
Home equity	2,754			1,662			8,991			13,407			1,272,836			1,286,243			—
Other consumer	6,214			1,230			2,020			9,464			1,022,480			1,031,944			402
Total consumer	16,558			5,306			30,252			52,116			3,990,205			4,042,321			402
Total	$	26,302		$	12,588		$	89,943		$	128,833		$	13,243,524		$	13,372,357		$	4,508
Acquired loans
Commercial:
Real estate	$	10,651		$	18,066		$	80,374		$	109,091		$	1,940,397		$	2,049,488		$	79,255
Business	5,661			1,864			12,864			20,389			646,603			666,992			5,963
Total commercial	16,312			19,930			93,238			129,480			2,587,000			2,716,480			85,218
Consumer:
Residential real estate	24,104			11,917			69,106			105,127			1,932,306			2,037,433			69,106
Home equity	10,241			5,437			20,705			36,383			1,329,265			1,365,648			7,268
Other consumer	4,506			2,968			5,859			13,333			204,761			218,094			5,468
Total consumer	38,851			20,322			95,670			154,843			3,466,332			3,621,175			81,842
Total	$	55,163		$	40,252		$	188,908		$	284,323		$	6,053,332		$	6,337,655		$	167,060
(1)	Includes credit card loans, loans that have matured and are in the process of collection, and acquired loans that were originally recorded at fair value upon acquisition. Acquired loans are considered to be accruing as we can reasonably estimate future cash flows on these acquired loans and we expect to fully collect the carrying value of these loans net of the allowance for acquired loan losses. Therefore, we are accreting the difference between the carrying value of these loans and their expected cash flows into interest income.
Our internal loan risk assessment provides information about the financial health of our commercial borrowers and our risk of potential loss. The following tables present information about the credit quality of our commercial loan portfolio at the dates indicated:
	Real estate			Business			Total			Percent of total
30-Sep-13
Originated loans:
Pass	$	5,778,744		$	4,481,784		$	10,260,528		94.7	%
Criticized:(1)
Accrual	263,567			223,412			486,979			4.5
Nonaccrual	51,302			35,854			87,156			0.8
Total criticized	314,869			259,266			574,135			5.3
Total	$	6,093,613		$	4,741,050		$	10,834,663		100	%
Acquired loans:
Pass	$	1,413,615		$	399,869		$	1,813,484		87.7	%
Criticized:(1)
Accrual	189,181			52,581			241,762			11.7
Nonaccrual	998			11,172			12,170			0.6
Total criticized	190,179			63,753			253,932			12.3
Total	$	1,603,794		$	463,622		$	2,067,416		100	%
31-Dec-12
Originated loans:
Pass	$	4,745,600		$	4,069,410		$	8,815,010		94.5	%
Criticized:(1)
Accrual	247,257			169,855			417,112			4.5
Nonaccrual	50,848			47,066			97,914			1
Total criticized	298,105			216,921			515,026			5.5
Total	$	5,043,705		$	4,286,331		$	9,330,036		100	%
Acquired loans:
Pass	$	1,794,282		$	581,555		$	2,375,837		87.4	%
Criticized:(1)
Accrual	254,086			76,505			330,591			12.2
Nonaccrual	1,120			8,932			10,052			0.4
Total criticized	255,206			85,437			340,643			12.6
Total	$	2,049,488		$	666,992		$	2,716,480		100	%
(1)	Includes special mention, substandard, doubtful, and loss, which are consistent with regulatory definitions, and as described in Item 1, “Business,” under “Asset Quality Review” in our Annual Report on 10-K for the year ended December 31, 2012.
Borrower FICO scores provide information about the credit quality of our consumer loan portfolio as they provide an indication as to the likelihood that a debtor will repay their debts. The scores are obtained from a nationally recognized consumer rating agency and are presented in the table below at the dates indicated:
	Residential			Home equity			Other			Total			Percent of
	real estate						consumer						total
30-Sep-13
Originated loans by refreshed FICO score:
Over 700	$	1,607,573		$	1,266,686		$	1,236,344		$	4,110,603		76.5	%
660-700	136,743			150,454			379,540			666,737			12.4
620-660	56,261			61,125			190,880			308,266			5.7
580-620	33,621			26,741			70,612			130,974			2.4
Less than 580	38,037			28,327			55,138			121,502			2.3
No score(1)	10,393			3,602			24,765			38,760			0.7
Total	$	1,882,628		$	1,536,935		$	1,957,279		$	5,376,842		100	%
Acquired loans by refreshed FICO score:
Over 700	$	1,130,390		$	901,936		$	2,055		$	2,034,381		72.4	%
660-700	125,434			103,897			886			230,217			8.2
620-660	77,683			63,922			495			142,100			5.1
580-620	53,207			39,547			243			92,997			3.3
Less than 580	73,729			38,971			198			112,898			4
No score(1)	176,162			21,395			—			197,557			7
Total	$	1,636,605		$	1,169,668		$	3,877		$	2,810,150		100	%
31-Dec-12
Originated loans by refreshed FICO score:
Over 700	$	1,381,565		$	1,009,913		$	589,804		$	2,981,282		73.7	%
660-700	167,046			148,692			232,474			548,212			13.6
620-660	67,520			59,085			122,656			249,261			6.2
580-620	38,570			28,487			45,545			112,602			2.8
Less than 580	57,794			36,152			36,866			130,812			3.2
No score(1)	11,639			3,914			4,599			20,152			0.5
Total	$	1,724,134		$	1,286,243		$	1,031,944		$	4,042,321		100	%
Acquired loans by refreshed FICO score:
Over 700	$	1,353,416		$	998,443		$	120,305		$	2,472,164		68.3	%
660-700	176,620			136,160			35,255			348,035			9.6
620-660	103,628			83,857			19,380			206,865			5.7
580-620	72,627			53,708			9,967			136,302			3.8
Less than 580	109,337			69,664			13,594			192,595			5.3
No score(1)	221,805			23,816			19,593			265,214			7.3
Total	$	2,037,433		$	1,365,648		$	218,094		$	3,621,175		100	%
(1)	Primarily includes loans that are serviced by others for which refreshed FICO scores were not available as of the date indicated.
Troubled Debt Restructures
The following table details additional information on our TDRs at the dates indicated:
	September 30,			December 31,
	2013			2012
Aggregate recorded investment of impaired loans with terms modified through a troubled debt restructuring:
Accruing interest	$	69,877		$	46,280
Nonaccrual	53,405			42,244
Total troubled debt restructurings (1)	$	123,282		$	88,524
(1)	Includes 63 and 44 acquired loans that were restructured with a recorded investment of $3.3 million and $2.9 million at September 30, 2013 and December 31, 2012, respectively.
The modifications made to loans classified as TDRs typically consist of an extension of the payment terms, providing for a period with interest-only payments with deferred principal payments, rate reduction, or loans restructured in a Chapter 7 bankruptcy. We generally do not forgive principal when restructuring loans.
The financial effects of our modifications are as follows for the periods indicated:
Type of Concession	Count		Postmodification			Premodification			Postmodification
			recorded			allowance for			allowance for
			investment(1)			loan losses			loan losses
Nine months ended September 30, 2013
Commercial:
Commercial real estate
Extension of term	5		$	9,354		$	634		$	510
Extension of term and rate reduction	6		15,910			740			438
Deferral of principal	1		7,782			429			—
Commercial business
Extension of term	9		10,237			1,576			185
Extension of term and rate reduction	7		974			139			232
Total commercial	28		44,257			3,518			1,365
Consumer:
Residential real estate
Extension of term	2		$	291		$	—		$	23
Rate reduction	3		109			—			3
Deferral of principal and extension of term	4		151			—			7
Extension of term and rate reduction	10		1,930			1			78
Chapter 7 bankruptcy	12		760			—			11
Home equity
Rate reduction	2		126			—			11
Deferral of principal and extension of term	1		111			—			1
Extension of term and rate reduction	2		40			—			—
Chapter 7 Bankruptcy	50		1,866			5			22
Other consumer
Rate reduction	1		25			1			1
Extension of term and rate reduction	1		46			1			—
Chapter 7 Bankruptcy	112		2,008			31			1
Total consumer	200		7,463			39			158
Total	228		$	51,720		$	3,557		$	1,523
Type of Concession	Count		Postmodification			Premodification			Postmodification
			recorded			allowance for			allowance for
			investment(1)			loan losses			loan losses
Nine months ended September 30, 2012
Commercial:
Commercial real estate
Extension of term	8		$	10,970		$	993		$	—
Deferral of principal	1		259			14			—
Commercial business
Extension of term	7		3,643			428			4
Deferral of principal	1		187			—			—
Rate reduction	1		125			—			—
Combination of concession types	1		386			6			96
Total commercial	19		15,570			1,441			100
Consumer:
Residential real estate
Extension of term	1		$	91		$	2		$	7
Deferral of principal and extension of term	1		613			1			27
Extension of term and rate reduction	7		830			1			216
Chapter 7 Bankruptcy	74		5,417			—			—
Other	18		2,302			3			459
Home equity
Extension of term and rate reduction	2		124			—			25
Chapter 7 Bankruptcy	144		5,636			—			—
Other	2		69			—			12
Other consumer
Chapter 7 Bankruptcy	48		1,442			—			—
Total consumer	297		16,524			7			746
Total	316		$	32,094		$	1,448		$	846
(1)	Postmodification balances approximate premodification balances. The aggregate amount of charge-offs as a result of the restructurings was not significant.
Type of Concession	Count		Postmodification			Premodification			Postmodification
			recorded			allowance for			allowance for
			investment(1)			loan losses			loan losses
Three months ended September 30, 2013
Commercial:
Commercial real estate
Extension of term	1		$	3,104		$	252		$	—
Commercial business
Extension of term	5		2,998			429			15
Extension of term and rate reduction	6		862			123			223
Total commercial	12		6,964			804			238
Consumer:
Residential real estate
Extension of term	1		173			—			12
Deferral of principal and extension of term	2		102			—			7
Extension of term and rate reduction	4		401			—			34
Chapter 7 Bankruptcy	4		324			—			—
Home equity
Rate reduction	1		37			—			1
Deferral of principal and extension of term	1		111			—			1
Extension of term and rate reduction	1		18			—			—
Chapter 7 Bankruptcy	17		545			2			—
Other consumer
Rate reduction	1		25			1			1
Extension of term and rate reduction	1		46			1			—
Chapter 7 Bankruptcy	40		637			16			—
Total consumer	73		2,419			20			56
Total	85		$	9,383		$	824		$	294
Three months ended September 30, 2012
Commercial:
Commercial real estate
Extension of term	1		$	7,497		$	812		$	—
Consumer:
Residential real estate
Chapter 7 Bankruptcy	74		5,417			—			—
Other	12		1,625			2			255
Home equity
Chapter 7 Bankruptcy	144		5,636			—			—
Other	2		69			—			12
Other consumer
Chapter 7 Bankruptcy	48		1,442			—			—
Total consumer	280		14,189			2			267
Total	281		$	21,686		$	814		$	267
(1)	Postmodification balances approximate premodification balances. The aggregate amount of charge-offs as a result of the restructurings was not significant.
The recorded investment in loans modified as TDRs within 12 months of the balance sheet date and for which there was a payment default during the periods indicated are shown below:
	Three months ended September 30,							Nine months ended September 30,
	2013			2012				2013			2012
Commercial:
Real estate	$	—		$	239			$	—		$	638
Business	—			380				—			1,087
Total commercial	—			619				—			1,725
Consumer:
Residential real estate	—			—				—			—
Home equity	—			—				76			—
Other consumer	—			—				—			—
Total consumer	—			—				76			—
Total	$	—		$	619			$	76		$	1,725
Residential Mortgage Banking
The following table provides information about our residential mortgage banking activities at the dates indicated:
	September 30,
	2013			2012
Mortgages serviced for others	$	3,574,124		$	2,658,722
Mortgage servicing asset recorded for loans serviced for others, net	33,571			23,136

Derivative_Financial_Instrumen

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Financial Instruments	'
	Derivative Financial Instruments
	We are a party to derivative financial instruments in the normal course of business to manage our own exposure to fluctuations in interest rates and to meet the needs of our customers. These financial instruments have been limited to interest rate swap agreements, which are entered into with counterparties that meet established credit standards and, where appropriate, contain master netting and collateral provisions protecting the party at risk. We believe that the credit risk inherent in all of our derivative contracts is minimal based on our credit standards and the netting and collateral provisions of the interest rate swap agreements.
	Our derivative positions include both instruments that are designated as hedging instruments and instruments that are customer related and not designated in hedging relationships. The following table presents information regarding our derivative financial instruments at the dates indicated:
		Asset derivatives							Liability derivatives
		Notional			Fair value  (1)				Notional			Fair value  (2)
		amount							amount
	30-Sep-13
	Derivatives designated as hedging instruments:
	Interest rate swap agreements	$	6,776		$	172			$	26,379		$	1,225
	Derivatives not designated as hedging instruments:
	Interest rate swap agreements	2,925,073			72,173				2,915,576			71,810
	Total derivatives	$	2,931,849		$	72,345			$	2,941,955		$	73,035
	31-Dec-12
	Derivatives designated as hedging instruments:
	Interest rate swap agreements	$	—		$	—			$	14,607		$	1,983
	Derivatives not designated as hedging instruments:
	Interest rate swap agreements	2,195,025			102,069				2,195,025			102,714
	Total derivatives	$	2,195,025		$	102,069			$	2,209,632		$	104,697
	(1)	Represents gross amounts, included in Other Assets in our Consolidated Statements of Condition.
	(2)	Represents gross amounts, included in Other Liabilities in our Consolidated Statements of Condition.
	At September 30, 2013, some of our interest rate swaps for which we had master netting arrangements with the counterparty were in a net liability position of $49 million. We offset $72 million of liabilities with $23 million of assets in our Consolidated Statements of Financial Condition at September 30, 2013 related to these interest rate swaps and we did not include any cash collateral in the netting. We posted collateral for liability positions with a fair value of $7 million at September 30, 2013.
	At December 31, 2012, all of our interest rate swaps for which we had master netting arrangements with the counterparty were in a liability position. Accordingly, there was no offsetting in our Consolidated Statements of Financial Condition at December 31, 2012 related to these interest rate swaps. We posted collateral for these liability positions with a fair value of $125 million at December 31, 2012.
	Derivatives designated in hedging relationships
	We designate interest rate swap agreements used to manage changes in the fair value of loans due to interest rate changes as fair value hedges. We have designated the risk of changes in the fair value of loans attributable to changes in the benchmark rate as the hedged risk. Accordingly, changes to the fair value of the hedged items or derivatives attributable to a change in credit risk are excluded from our assessment of hedge effectiveness. The change in fair value of the derivatives, including both the effective and ineffective portions, is recognized in earnings and, so long as our fair value hedging relationships remain highly effective, such change is offset by the gain or loss due to the change in fair value of the loans. The net impact of the fair value hedging relationships on net income was not significant for the three and nine months ended September 30, 2013 and 2012.
	Historically, we have also entered into interest rate swaps to offset the variability in the interest cash outflows of LIBOR based borrowings. These derivative instruments have been designated as cash flow hedges. At September 30, 2013, we did not have any derivatives classified as cash flow hedges. At September 30, 2013, there was a $5.7 million loss recognized in accumulated other comprehensive income related to borrowings that were previously hedged using interest rate swaps that were classified as cash flow hedges. This amount will be reclassified out of accumulated other comprehensive income and into earnings over the remaining life of the hedged borrowings as an adjustment of yield.
	The following table presents information about amounts recognized for our derivative financial instruments designated in cash flow hedging relationships for the periods indicated:
		Three months ended September 30,								Nine months ended September 30,
	Cash Flow Hedges	2013				2012				2013				2012
	Interest rate swap agreements:
	Amount of gain on derivatives recognized in other comprehensive income, net of tax	$	184			$	177			$	530			$	6,536
	Amount of (loss) on derivatives reclassified from other comprehensive income to income	(286		)	(1)	(286		)	(1)	(848		)	(1)	(15,146		)	(2)
	(1)	Recognized in interest expense on borrowings in our Consolidated Statements of Income.
	(2)	Of this amount, $11.7 million was recognized in merger and acquisition integration expenses when the associated borrowings were repaid in connection with the HSBC Branch Acquisition and $3.4 million was recognized in interest expense on borrowings in our Consolidated Statements of Income.
	Derivatives not designated in hedging relationships
	In addition to our derivatives designated in hedge relationships, we act as an interest rate swap counterparty for certain commercial borrowers in the normal course of servicing our customers, which are accounted for at fair value. We manage our exposure to such interest rate swaps by entering into corresponding and offsetting interest rate swaps with third parties that mirror the terms of the interest rate swaps we have with the commercial borrowers. These positions (referred to as “customer swaps”) directly offset each other and our exposure is the positive fair value of the derivatives due to changes in credit risk of our commercial borrowers and third parties. We recognized revenue for this service that we provide our customers of $13.5 million and $18.1 million for the nine months ended September 30, 2013 and 2012, respectively, included in Capital Markets income in our Consolidated Statements of Income.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings Per Share
	The following table is a computation of our basic and diluted earnings per share using the two-class method for the periods indicated:
		Three months ended September 30,						Nine months ended September 30,
		2013			2012			2013			2012
	Net income available to common stockholders	$	71,596		$	50,837		$	194,921		$	87,116
	Less income allocable to unvested restricted stock awards	453			200			1,030			283
	Net income allocable to common stockholders	$	71,143		$	50,637		$	193,891		$	86,833
	Weighted average common shares outstanding:
	Total shares issued	366,002			366,002			366,002			366,002
	Unallocated employee stock ownership plan shares	(2,090		)	(2,267		)	(2,134		)	(2,289		)
	Unvested restricted stock awards	(2,224		)	(1,377		)	(1,818		)	(1,117		)
	Treasury shares	(12,035		)	(13,357		)	(12,558		)	(13,640		)
	Total basic weighted average common shares outstanding	349,653			349,001			349,492			348,956
	Incremental shares from assumed exercise of stock options	14			—			—			—
	Incremental shares from assumed vesting of restricted stock awards	1,229			370			876			292
	Total diluted weighted average common shares outstanding	350,896			349,371			350,368			349,248
	Basic earnings per common share	$	0.2		$	0.15		$	0.55		$	0.25
	Diluted earnings per common share	$	0.2		$	0.14		$	0.55		$	0.25
	Anti-dilutive stock options and restricted stock awards excluded from the diluted weighted average common share calculations	11,099			12,629			11,396			11,867

Other_Comprehensive_Income

Other Comprehensive Income	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Other Comprehensive Income	'
	Other Comprehensive Income
	The following table presents the activity in our Other Comprehensive Income for the periods indicated:
		Three months ended September 30,										Nine months ended September 30,
		Pretax			Income taxes			Net				Pretax			Income taxes			Net
	2013
	Securities available for sale:
	Net unrealized holding losses arising during the period	$	(11,514	)	$	(4,302	)	$	(7,212	)		$	(155,943	)	$	(59,719	)	$	(96,224	)
	Reclassification adjustment for net unrealized holding gains on securities transferred between available for sale and held to maturity	—			—			—				(54,872		)	(21,049		)	(33,823		)
	Net unrealized losses on securities available for sale	(11,514		)	(4,302		)	(7,212		)		(210,815		)	(80,768		)	(130,047		)
	Net unrealized holding gains on securities transferred between available for sale and held to maturity:
	Net unrealized holding gains transferred during the period	—			—			—				54,872			21,049			33,823
	Amortization of net unrealized holding gains to income during the period	(6,325		)	(2,426		)	(3,899		)	(1)	(15,673		)	(6,006		)	(9,667		)	(1)
	Net unrealized holding (losses) gains on securities transferred during the period	(6,325		)	(2,426		)	(3,899		)		39,199			15,043			24,156
	Interest rate swaps designated as cash flow hedges:
	Reclassification adjustment for realized losses included in net income	286			102			184			(2)	848			318			530			(2)
	Pension and post-retirement plans:
	Amortization of net loss related to pension and post-retirement plans	48			—			48				143			—			143
	Total other comprehensive loss	$	(17,505	)	$	(6,626	)	$	(10,879	)		$	(170,625	)	$	(65,407	)	$	(105,218	)
		Three months ended September 30,										Nine months ended September 30,
		Pretax			Income taxes			Net				Pretax			Income taxes			Net
	2012
	Securities available for sale:
	Net unrealized holding gains arising during the period	$	114,086		$	43,169		$	70,917			$	172,098		$	65,727		$	106,371
	Reclassification adjustment for realized (gains) included in net income	—			—			—				(15,895		)	(6,097		)	(9,798		)
	Reclassification adjustment for net unrealized holding gains on securities transferred between available for sale and held to maturity	—			—			—				4,054			1,556			2,498
	Net unrealized gains on securities available for sale	114,086			43,169			70,917				160,257			61,186			99,071
	Net unrealized holding gains on securities transferred between available for sale and held to maturity:
	Reclassification adjustment for net unrealized holding gains on securities transferred	—			—			—				(4,054		)	(1,556		)	(2,498		)
	Amortization of net unrealized holding gains to income during the period	(682		)	(260		)	(422		)	(1)	(2,011		)	(749		)	(1,262		)	(1)
	Net unrealized holding gains on securities transferred	(682		)	(260		)	(422		)		(6,065		)	(2,305		)	(3,760		)
	Interest rate swaps designated as cash flow hedges:
	Net unrealized gains arising during the period	—			—			—				(4,590		)	(1,789		)	(2,801		)
	Reclassification adjustment for realized losses included in net income	286			109			177			(2)	15,146			5,809			9,337			(2)
	Net unrealized losses on interest rate swaps designated as cash flow hedges	286			109			177				10,556			4,020			6,536
	Pension and postretirement plans:
	Pension remeasurement	—			—			—				7,461			2,849			4,612
	Amortization of net loss related to pension and post-retirement plans	362			139			223				1,128			584			544
	Total pension and post-retirement plans	362			139			223				8,589			3,433			5,156
	Total other comprehensive income	$	114,052		$	43,157		$	70,895			$	173,337		$	66,334		$	107,003
	(1) Included in Interest income on investment securities and other in our Consolidated Statement of Income.
	(2) Included in Interest expense on borrowings in our Consolidated Statement of Income.
	The following table presents the activity in our accumulated other comprehensive income for the periods indicated:
		Net unrealized gains on securities available for sale			Net unrealized (losses) gains on			Unrealized (losses)			Pension and postretirement plans			Total
					securities transferred from			gains on interest rate
					available for sale to			swaps designated as
					held to maturity			cash flow hedges
	Balance, January 1, 2013	$	206,733		$	(1,691	)	$	(6,262	)	$	(41,477	)	$	157,303
	Period change, net of tax	(130,047		)	24,156			530			143			(105,218		)
	Balance, September 30, 2013	$	76,686		$	22,465		$	(5,732	)	$	(41,334	)	$	52,085
	Balance, January 1, 2012	$	105,276		$	2,652		$	(13,003	)	$	(27,113	)	$	67,812
	Period change, net of tax	99,071			(3,760		)	6,536			5,156			107,003
	Balance, September 30, 2012	$	204,347		$	(1,108	)	$	(6,467	)	$	(21,957	)	$	174,815
	During the next twelve months, we expect to reclassify $1.1 million of pre-tax net loss on previous cash flow hedges from accumulated other comprehensive income to earnings.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Current accounting guidance establishes a fair value hierarchy based on the transparency of inputs participants use to price an asset or liability. The fair value hierarchy prioritizes these inputs into the following three levels:
	Level 1 Inputs—Unadjusted quoted prices in active markets for identical assets or liabilities that are available at the measurement date.
	Level 2 Inputs—Inputs, other than quoted prices included within Level 1, that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risks, etc.), or inputs that are derived principally from or corroborated by market data through correlation or other means.
	Level 3 Inputs—Unobservable inputs for determining the fair value of the asset or liability and are based on the entity’s own estimates about the assumptions that market participants would use to price the asset or liability.
	A financial instrument’s categorization within the valuation hierarchy is based on the lowest level of input that is significant to the fair value measurement. A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below.
	Our valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While we believe our valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value.
	Assets and Liabilities Measured at Fair Value on a Recurring Basis
	Securities Available for Sale
	The fair value estimates of available for sale securities are based on quoted market prices of identical securities, where available (Level 1). However, as quoted prices of identical securities are not often available, the fair value estimate for almost our entire investment portfolio is based on quoted market prices of similar securities, adjusted for differences between the securities (Level 2). Adjustments may include amounts to reflect differences in underlying collateral, interest rates, estimated prepayment speeds, and counterparty credit quality. Where sufficient information is not available from the pricing services to produce a reliable valuation, we estimate fair value based on either broker quotes or internally developed models. Due to the lack of observable market data, we have classified our trust preferred securities and collateralized loan obligations in Level 3 of the fair value hierarchy. We determined the fair value using third party pricing services, including brokers. As of September 30, 2013, $1.6 billion of our investment securities were priced utilizing broker quotes and none were internally priced. For details regarding our pricing process and sources, refer to Item 2, “Management’s Discussion and Analysis of Financial Condition and Results of Income-Critical Accounting Policies and Estimates.”
	Loans held for sale
	We have elected the fair value option for certain residential real estate loans held for sale as we believe the fair value measurement of such loans reduces certain timing differences in our Statement of Income and better aligns with our management of the portfolio from a business perspective. This election is made at the time of origination, on a loan by loan basis, and is irrevocable. The secondary market for securities backed by similar loan types is actively traded, which provides readily observable market pricing to be used as input for the estimate for the fair value of our loans. Accordingly, we have classified this fair value measurement as Level 2. Interest income on these loans is recognized in Interest Income—Loans and Leases in our Consolidated Statements of Income.
	There were no loans held for sale that were nonaccrual or 90 or more days past due as of September 30, 2013 or December 31, 2012. The table below presents information about our loans held for sale for which we elected the fair value option at the dates indicated:
		September 30,			December 31,
		2013			2012
	Fair value carrying amount	$	80,468		$	154,745
	Aggregate unpaid principal balance	77,427			149,412
	Fair value carrying amount less aggregate unpaid principal balance	$	3,041		$	5,333
	Derivatives
	We obtain fair value measurements of our interest rate swaps from a third party. The fair value measurements are determined using a market standard methodology of netting discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). Variable cash payments (or receipts) are based on an expectation of future interest rates derived from observable market interest rate curves. Credit valuation adjustments are incorporated to appropriately reflect our nonperformance risk as well as the counterparty’s nonperformance risk. The impact of netting and any applicable credit enhancements, such as bilateral collateral postings, thresholds, mutual puts, and guarantees are also considered in the fair value measurement.
	The fair value of our interest rate swaps was estimated using primarily Level 2 inputs. However, Level 3 inputs were used to determine credit valuation adjustments, such as estimates of current credit spreads to evaluate the likelihood of default. We have determined that the impact of these credit valuation adjustments was not significant to the overall valuation of our interest rate swaps. Therefore, we have classified the entire fair value of our interest rate swaps in Level 2 of the fair value hierarchy.
	Assets and Liabilities Measured at Fair Value on a Recurring Basis
	The following tables summarize our assets and liabilities measured at fair value on a recurring basis at the dates indicated:
		Fair Value Measurements
		Total			Level 1			Level 2			Level 3
	30-Sep-13
	Assets:
	Investment securities available for sale:
	Debt securities:
	States and political subdivisions	$	544,544		$	—		$	544,544		$	—
	U.S. Treasury	20,511			20,511			—			—
	U.S. government agencies	4,174			—			4,174			—
	U.S. government sponsored enterprises	325,387			—			325,387			—
	Corporate	864,888			—			864,888			—
	Trust preferred securities	5,340			—			—			5,340
	Total debt securities	1,764,844			20,511			1,738,993			5,340
	Mortgage-backed securities:
	Residential mortgage-backed securities:
	Government National Mortgage Association	42,448			—			42,448			—
	Federal National Mortgage Association	150,262			—			150,262			—
	Federal Home Loan Mortgage Corporation	171,616			—			171,616			—
	Collateralized mortgage obligations:
	Federal National Mortgage Association	794,804			—			794,804			—
	Federal Home Loan Mortgage Corporation	393,683			—			393,683			—
	Non-agency issued	16,233			—			16,233			—
	Total collateralized mortgage obligations	1,204,720			—			1,204,720			—
	Total residential mortgage-backed securities	1,569,046			—			1,569,046			—
	Commercial mortgage-backed securities, non-agency issued	1,863,116			—			1,863,116			—
	Total mortgage-backed securities	3,432,162			—			3,432,162			—
	Collateralized loan obligations, non-agency issued	1,466,125			—			—			1,466,125
	Asset-backed securities collateralized by:
	Student loans	317,513			—			317,513			—
	Credit cards	73,023			—			73,023			—
	Auto loans	336,552			—			336,552			—
	Other	187,156			—			187,156			—
	Total asset-backed securities	914,244			—			914,244			—
	Other	32,301			22,476			9,825			—
	Total securities available for sale	7,609,676			42,987			6,095,224			1,471,465
	Loans held for sale (1)	80,468			—			80,468			—
	Derivatives	49,259			—			49,259			—
	Total assets	$	7,739,403		$	42,987		$	6,224,951		$	1,471,465
	Liabilities:
	Derivatives	$	49,949		$	—		$	49,949		$	—
(1)	Represents loans for which we have elected the fair value option.
There were no significant transfers of assets or liabilities into or out of Level 1, Level 2, or Level 3 of the fair value hierarchy during the nine months ended September 30, 2013. During the first quarter of 2012, we transferred $158 million of collateralized loan obligations (“CLOs”) from level 2 to level 3 of the fair value hierarchy. We began purchasing the investments in the fourth quarter of 2011 and while our purchase price provided observable data regarding the fair value of the securities in the fourth quarter of 2011, observable market data was not available to incorporate into the pricing during 2012 and our purchase price became less relevant as time elapsed from the purchase date. As a result, the fair values utilized significant unobservable inputs and warranted classification as level 3 fair value measurements.
	Fair Value Measurements
	Total			Level 1			Level 2			Level 3
31-Dec-12
Assets:
Investment securities available for sale:
Debt securities:
States and political subdivisions	$	608,061		$	—		$	608,061		$	—
U.S. Treasury	20,707			20,707			—			—
U.S. government agencies	4,651			—			4,651			—
U.S. government sponsored enterprises	403,892			—			403,892			—
Corporate	837,027			—			837,027			—
Trust preferred securities	14,195			—			—			14,195
Total debt securities	1,888,533			20,707			1,853,631			14,195
Mortgage-backed securities:
Residential mortgage-backed securities:
Government National Mortgage Association	69,626			—			69,626			—
Federal National Mortgage Association	414,462			—			414,462			—
Federal Home Loan Mortgage Corporation	354,893			—			354,893			—
Collateralized mortgage obligations:
Government National Mortgage Association	1,091,157			—			1,091,157			—
Federal National Mortgage Association	1,474,428			—			1,474,428			—
Federal Home Loan Mortgage Corporation	1,047,217			—			1,047,217			—
Non-agency issued	61,123			—			61,123			—
Total collateralized mortgage obligations	3,673,925			—			3,673,925			—
Total residential mortgage-backed securities	4,512,906			—			4,512,906			—
Commercial mortgage-backed securities, non-agency issued	2,060,221			—			2,060,221			—
Total mortgage-backed securities	6,573,127			—			6,573,127			—
Collateralized loan obligations, non-agency issued	1,544,865			—			—			1,544,865
Asset-backed securities collateralized by:
Student loans	389,741			—			389,741			—
Credit cards	75,075			—			75,075			—
Auto loans	372,166			—			372,166			—
Other	118,659			—			118,659			—
Total asset-backed securities	955,641			—			955,641			—
Other	31,439			23,311			8,128			—
Total securities available for sale	10,993,605			44,018			9,390,527			1,559,060
Loans held for sale (1)	154,745			—			154,745			—
Derivatives	102,069			—			102,069			—
Total assets	$	11,250,419		$	44,018		$	9,647,341		$	1,559,060
Liabilities:
Derivatives	$	104,697		$	—		$	104,697		$	—
(1)	Represents loans for which we have elected the fair value option.
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
The following table summarizes our assets and liabilities measured at fair value on a nonrecurring basis for the periods indicated:
	Fair Value Measurements												Total gains
	Total			Level 1			Level 2			Level 3			(losses)
Nine months ended September 30, 2013
Collateral dependent impaired loans	$	23,694		$	—		$	13,708		$	9,986		$	(423	)
Nine months ended September 30, 2012
Collateral dependent impaired loans	$	35,651		$	—		$	20,490		$	15,161		$	(2,889	)
Collateral Dependent Impaired Loans
We record nonrecurring fair value adjustments to the carrying value of collateral dependent impaired loans when establishing the allowance for loan losses. Such amounts are generally based on the fair value of the underlying collateral supporting the loan less estimated costs to sell the collateral. When the fair value of such collateral, less costs to sell, is less than the carrying value of the loan, a specific allowance or charge off is recorded through a provision for credit losses. Real estate collateral is typically valued using independent appraisals that we review for acceptability, or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace and the related nonrecurring fair value measurements have been classified as Level 2. Under certain circumstances significant adjustments may be made to the appraised value due to the lack of direct marketplace information. Such adjustments are made as determined necessary in the judgment of our experienced senior credit officers to reflect current market conditions and current operating results for the specific collateral. When the fair value of collateral dependent impaired loans is based on appraisals containing significant adjustments, such collateral dependent impaired loans are classified as Level 3. We obtain new appraisals from an approved appraiser, in accordance with Interagency Appraisal and Evaluation Guidelines and internal policy. Appraisals or evaluations for assets securing substandard rated loans are usually completed within 90 days of the downgrade. An appraisal may be obtained more frequently when volatile or unusual market conditions exist that could affect the ultimate realization of the value of the real estate collateral.
During the nine months ended September 30, 2013, we recorded an increase of $0.4 million to our specific allowance as a result of adjusting the fair value of the collateral for certain collateral dependent impaired loans to $24 million at September 30, 2013, which is included in our provision for credit losses. During the nine months ended September 30, 2012 we recorded an increase of $2.9 million to our specific allowance as a result of adjusting the fair value of the collateral for certain collateral dependent impaired loans to $36 million at September 30, 2012, which is included in our provision for credit losses.
Level 3 Assets
The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis were as follows for the periods indicated:
	Nine months ended September 30,
	2013										2012
	Trust			Collateralized			Total				Trust			Collateralized		Total
	preferred			loan obligations							preferred			loan obligations
	securities										securities
Balance at beginning of period	$	14,195		$	1,544,865		$	1,559,060			$	25,032		$	—	$	25,032
Transfers from level 2(1)	—			—			—				—			157,999		157,999
Purchases	—			73,392			73,392				—			1,081,678		1,081,678
Settlements	(8,854		)	(159,295		)	(168,149		)		(12,199		)	—		(12,199		)
Gains included in other comprehensive income	703			7,204			7,907				2,923			30,904		33,827
Losses included in earnings	(704		)	(41		)	(745		)		(446		)	—		(446		)
Balance at end of period	$	5,340		$1,466,125			$	1,471,465			$	15,310		$	1,270,581	$	1,285,891
(1)	Our policy is to recognize the transfer at the beginning of the period.
Our CLOs are securitized products where payments from multiple middle sized and large business loans are pooled together and passed on to different classes of owners in various tranches. The markets for such securities are generally characterized by low trading volumes and wide bid-ask spreads, all driven by more limited market participants. Although estimated prices are generally obtained for such securities, the level of market observable assumptions used is limited in the valuation. Specifically, market assumptions regarding credit adjusted cash flows and liquidity influences on discount rates were difficult to observe at the individual bond level. Accordingly, the securities are valued either by a third party specialist using a discounted cash flow approach and proprietary pricing model or internally using similarly developed models. The models consider estimated prepayment speeds, losses, recoveries, default rates that are implied by the underlying performance of collateral in the structure or similar structures, and discount rates that are implied by market prices for similar securities and collateral structure types.
The table below provides a summary of our level 3 fair value measurements, valuation techniques, and the significant unobservable inputs at the date indicated:
	Fair			Valuation	Unobservable	Range (weighted average)
	Value			technique	input
31-Dec-12
Collateralized loan obligations	$	1,544,865		Internally modeled	Market spreads	150 - 550 bps (213 bps)
As of September 30, 2013, the fair values of our trust preferred securities and CLOs are all based upon third party pricing without adjustment and as a result, the assets are not included in the above table. As of December 31, 2012, the fair values of our trust preferred securities were based upon third party pricing without adjustment and as a result the assets are not included in the above table.
Significant changes in any of the unobservable inputs would result in changes in fair value of the related assets. The fair value of our CLOs is inversely related to the market spreads. Increases in market spreads would decrease the fair value of our CLOs while decreases in the market spreads would increase our fair value.
Fair Value of Financial Instruments
The carrying value and estimated fair value of our financial instruments, including those that are not measured and reported at fair value on a recurring basis or nonrecurring basis, at the dates indicated are as follows:
	30-Sep-13										31-Dec-12
	Carrying value			Estimated fair			Fair value				Carrying value			Estimated fair		Fair value
				value			level							value		level
Financial assets:
Cash and cash equivalents	$	558,086		$	558,086		1				$	430,862		$	430,862	1
Investment securities available for sale	7,609,676			7,609,676			1,2,3		(1)		10,993,605			10,993,605		1,2,3		(1)
Investment securities held to maturity	3,841,700			3,839,863			2				1,299,806			1,373,971		2
Federal Home Loan Bank and Federal Reserve Bank common stock	437,534			437,534			2				420,277			420,277		2
Loans held for sale	80,468			80,468			2				154,745			154,745		2
Loans and leases, net	20,891,118			21,307,115			2,3		(2)		19,547,490			20,213,465		2,3		(2)
Derivatives	49,259			49,259			2				102,069			102,069		2
Accrued interest receivable	108,345			108,345			2				107,757			107,757		2
Financial liabilities:
Deposits	$	26,969,002		27,121,761			2				$	27,676,531		$	27,852,175	2
Borrowings	4,901,963			4,860,013			2				3,716,143			3,773,787		2
Derivatives	49,949			49,949			2				104,697			104,697		2
Accrued interest payable	10,925			10,925			2				9,695			9,695		2
(1)	For a detailed breakout of our investment securities available for sale, refer to our table of recurring fair value measurements.
(2)	Loans and leases classified as level 2 are made up of $14 million and $31 million of collateral dependent impaired loans without significant adjustments made to appraised values at September 30, 2013 and December 31, 2012, respectively. All other loans and leases are classified as level 3.
Our fair value estimates are based on our existing on and off balance sheet financial instruments without attempting to estimate the value of any anticipated future business and the value of assets and liabilities that are not considered financial instruments. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on our fair value estimates and have not been considered in these estimates.
Our fair value estimates are made as of the dates indicated, based on relevant market information and information about the financial instruments, including our judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in our assumptions could significantly affect the estimates. Our fair value estimates, methods, and assumptions are set forth below for each type of financial instrument. The method of estimating the fair value of the financial instruments disclosed in the table above does not necessarily incorporate the exit price concept used to record financial instruments at fair value in our Consolidated Statements of Condition.
Cash and Cash Equivalents
The carrying value of our cash and cash equivalents approximates fair value because these instruments have original maturities of three months or less.
Investment Securities
The fair value estimates of securities are based on quoted market prices of identical securities, where available. However, as quoted prices of identical securities are not often available, the fair value estimate for almost our entire investment portfolio is based on quoted market prices of similar securities, adjusted for differences between the securities. Adjustments may include amounts to reflect differences in underlying collateral, interest rates, estimated prepayment speeds, and counterparty credit quality.
Federal Home Loan Bank and Federal Reserve Bank Common Stock
The carrying value of our Federal Home Loan Bank and Federal Reserve Bank common stock, which are non-marketable equity investments, approximates fair value.
Loans and Leases
Our variable rate loans reprice as the associated rate index changes. The calculation of fair value for our variable rate loans is driven by the comparison between the loan’s margin and the prevailing margin observed in the market at the time of the valuation. Any caps and floors embedded in the loan’s pricing structure are also incorporated into the fair value. We calculated the fair value of our fixed-rate loans and leases by discounting scheduled cash flows through the estimated maturity using credit adjusted period end origination rates. Our estimate of maturity is based on the contractual cash flows adjusted for prepayment estimates based on current economic and lending conditions.
Accrued Interest Receivable and Accrued Interest Payable
The carrying value of accrued interest receivable and accrued interest payable approximates fair value.
Deposits
The fair value of our deposits with no stated maturity, such as savings and checking, as well as mortgagors’ payments held in escrow, is equal to the amount payable on demand. The fair value of our certificates of deposit is based on the discounted value of contractual cash flows, using the period end rates offered for deposits of similar remaining maturities.
Borrowings
The fair value of our borrowings is calculated by discounting scheduled cash flows through the estimated maturity using period end market rates for borrowings of similar remaining maturities.
Commitments
The fair value of our commitments to extend credit, standby letters of credit, and financial guarantees are not included in the above table as the carrying value generally approximates fair value. These instruments generate fees that approximate those currently charged to originate similar commitments.

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	We have two business segments: banking and financial services. The banking segment includes all of our retail and commercial banking operations. The financial services segment includes our insurance operations. Substantially all of our assets relate to the banking segment. Transactions between our banking and financial services segments are eliminated in consolidation.
	Selected financial information for our segments follows for the periods indicated:
		Banking		Financial			Consolidated
				services			total
	Three months ended September 30, 2013
	Net interest income	$	277,540	$	—		$	277,540
	Provision for credit losses	27,600		—			27,600
	Net interest income after provision for credit losses	249,940		—			249,940
	Noninterest income	73,511		17,911			91,422
	Amortization of intangibles	6,856		846			7,702
	Other noninterest expense	210,256		13,235			223,491
	Income before income taxes	106,339		3,830			110,169
	Income tax expense	29,549		1,477			31,026
	Net income	$	76,790	$	2,353		$	79,143
	Three months ended September 30, 2012
	Net interest income	$	269,610	$	(5	)	$	269,605
	Provision for credit losses	22,200		—			22,200
	Net interest income after provision for credit losses	247,410		(5		)	247,405
	Noninterest income	83,472		18,731			102,203
	Amortization of core deposit and other intangibles	13,468		1,038			14,506
	Other noninterest expense	239,007		13,029			252,036
	Income before income taxes	78,407		4,659			83,066
	Income tax expense	22,895		1,787			24,682
	Net income	$	55,512	$	2,872		$	58,384
	Nine months ended September 30, 2013
	Net interest income	$	813,113	$	—		$	813,113
	Provision for credit losses	73,000		—			73,000
	Net interest income after provision for credit losses	740,113		—			740,113
	Noninterest income	224,309		51,971			276,280
	Amortization of intangibles	30,058		2,613			32,671
	Other noninterest expense	632,268		39,090			671,358
	Income before income taxes	302,096		10,268			312,364
	Income tax expense	90,855		3,947			94,802
	Net income	$	211,241	$	6,321		$	217,562
	Nine months ended September 30, 2012
	Net interest income	$	771,012	$	(23	)	$	770,989
	Provision for credit losses	70,300		—			70,300
	Net interest income after provision for credit losses	700,712		(23		)	700,689
	Noninterest income	215,305		52,404			267,709
	Amortization of core deposit and other intangibles	27,551		3,260			30,811
	Other noninterest expense	743,072		38,476			781,548
	Income before income taxes	145,394		10,645			156,039
	Income tax expense	44,631		4,083			48,714
	Net income	$	100,763	$	6,562		$	107,325

Loans_and_Leases_Policies

Loans and Leases (Policies)	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Acquired Loans	'
	We have acquired loans in four acquisitions since January 1, 2009. All acquired loans were initially measured at fair value and subsequently accounted for under either Accounting Standards Codification Topic (“ASC”) 310-30 (Loans and Debt Securities Acquired with Deteriorated Credit Quality) or ASC 310-20 (Nonrefundable Fees and Other Costs.

Acquisitions_Tables

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2013
Business Acquisition [Line Items]	'
Estimated fair values of the assets acquired and liabilities assumed at date of acquisition	'
	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the date of acquisition:
	Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value:
	Cash and cash equivalents (1)	$	7,360,218
	Loans	1,599,712
	Core deposit and other intangibles	84,631
	Other assets	72,323
	Total assets acquired	9,116,884
	Deposits(2)	(9,854,589		)
	Other liabilities	(32,792		)
	Total liabilities assumed	(9,887,381		)
	Goodwill	$	770,497
	(1)	Amount is net of $772 million deposit premium paid to HSBC.
	(2)	Deposits reported exclude $0.5 billion in municipal deposits that were subject to a price concession.
Information about the acquired loan portfolio	'
	Information about the acquired HSBC loan portfolio as of May 18, 2012 is in the following table, and excludes home equity lines of credit, credit card, and any other line of credit:
	Contractually required principal and interest at acquisition	$	758,449
	Contractual cash flows not expected to be collected (nonaccretable discount)	(16,497		)
	Expected cash flows at acquisition	741,952
	Interest component of expected cash flows (accretable discount)	(90,670		)
	Fair value of acquired loans (excluding lines of credit)	$	651,282

Investment_Securities_Tables

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract]	'
The amortized cost, gross unrealized gains and losses, and approximate fair value of investment securities	'
	The amortized cost, gross unrealized gains and losses, and fair value of our investment securities at the dates indicated are summarized as follows:
		Amortized		Unrealized			Unrealized			Fair
	30-Sep-13	cost		gains			losses			value
	Investment securities available for sale:
	Debt securities:
	States and political subdivisions	$	531,258	$	13,606		$	(320	)	$	544,544
	U.S. Treasury	19,956		555			—			20,511
	U.S. government agencies	4,181		7			(14		)	4,174
	U.S. government sponsored enterprises	317,836		8,229			(678		)	325,387
	Corporate	867,106		14,508			(16,726		)	864,888
	Trust preferred securities	5,966		—			(626		)	5,340
	Total debt securities	1,746,303		36,905			(18,364		)	1,764,844
	Mortgage-backed securities:
	Residential mortgage-backed securities:
	Government National Mortgage Association	43,352		777			(1,681		)	42,448
	Federal National Mortgage Association	145,427		4,845			(10		)	150,262
	Federal Home Loan Mortgage Corporation	167,114		4,502			—			171,616
	Collateralized mortgage obligations:
	Federal National Mortgage Association	817,057		552			(22,805		)	794,804
	Federal Home Loan Mortgage Corporation	403,730		777			(10,824		)	393,683
	Non-agency issued	15,513		728			(8		)	16,233
	Total collateralized mortgage obligations	1,236,300		2,057			(33,637		)	1,204,720
	Total residential mortgage-backed securities	1,592,193		12,181			(35,328		)	1,569,046
	Commercial mortgage-backed securities, non-agency issued	1,784,661		80,322			(1,867		)	1,863,116
	Total mortgage-backed securities	3,376,854		92,503			(37,195		)	3,432,162
	Collateralized loan obligations, non-agency issued	1,424,309		43,410			(1,594		)	1,466,125
	Asset-backed securities collateralized by:
	Student loans	311,532		6,363			(382		)	317,513
	Credit cards	73,051		380			(408		)	73,023
	Auto loans	333,248		3,812			(508		)	336,552
	Other	187,306		917			(1,067		)	187,156
	Total asset-backed securities	905,137		11,472			(2,365		)	914,244
	Other	32,503		57			(259		)	32,301
	Total securities available for sale	$	7,485,106	$	184,347		$	(59,777	)	$	7,609,676
	Investment securities held to maturity:
	Residential mortgage-backed securities:
	Government National Mortgage Association	$	18,333	$	222		$	(106	)	$	18,449
	Federal National Mortgage Association	154,141		180			(2,545		)	151,776
	Federal Home Loan Mortgage Corporation	85,975		203			(580		)	85,598
	Collateralized mortgage obligations:
	Government National Mortgage Association	1,459,691		34,950			(1,433		)	1,493,208
	Federal National Mortgage Association	1,105,058		1,116			(31,712		)	1,074,462
	Federal Home Loan Mortgage Corporation	1,018,502		18,753			(20,885		)	1,016,370
	Total collateralized mortgage obligations	3,583,251		54,819			(54,030		)	3,584,040
	Total securities held to maturity	$	3,841,700	$	55,424		$	(57,261	)	$	3,839,863
		Amortized		Unrealized			Unrealized			Fair
	31-Dec-12	cost		gains			losses			value
	Investment securities available for sale:
	Debt securities:
	States and political subdivisions	$	587,482	$	20,723		$	(144	)	$	608,061
	U.S. Treasury	19,944		763			—			20,707
	U.S. government agencies	4,641		13			(3		)	4,651
	U.S. government sponsored enterprises	390,421		13,471			—			403,892
	Corporate	811,720		28,390			(3,083		)	837,027
	Trust preferred securities	15,524		—			(1,329		)	14,195
	Total debt securities	1,829,732		63,360			(4,559		)	1,888,533
	Mortgage-backed securities:
	Residential mortgage-backed securities:
	Government National Mortgage Association	67,700		2,123			(197		)	69,626
	Federal National Mortgage Association	394,274		20,218			(30		)	414,462
	Federal Home Loan Mortgage Corporation	342,906		11,987			—			354,893
	Collateralized mortgage obligations:
	Government National Mortgage Association	1,060,415		30,742			—			1,091,157
Federal National Mortgage Association	1,460,400		14,968			(940		)	1,474,428
Federal Home Loan Mortgage Corporation	1,036,308		11,204			(295		)	1,047,217
Non-agency issued	59,604		1,544			(25		)	61,123
Total collateralized mortgage obligations	3,616,727		58,458			(1,260		)	3,673,925
Total residential mortgage-backed securities	4,421,607		92,786			(1,487		)	4,512,906
Commercial mortgage-backed securities, non-agency issued	1,929,727		131,785			(1,291		)	2,060,221
Total mortgage-backed securities	6,351,334		224,571			(2,778		)	6,573,127
Collateralized loan obligations, non-agency issued	1,510,253		35,466			(854		)	1,544,865
Asset-backed securities collateralized by:
Student loans	377,923		11,952			(134		)	389,741
Credit cards	73,768		1,319			(12		)	75,075
Auto loans	366,501		5,708			(43		)	372,166
Other	117,885		781			(7		)	118,659
Total asset-backed securities	936,077		19,760			(196		)	955,641
Other	30,824		707			(92		)	31,439
Total securities available for sale	$	10,658,220	$	343,864		$	(8,479	)	$	10,993,605
Investment securities held to maturity:
Residential mortgage-backed securities:
Government National Mortgage Association	$	5,988	$	340		$	(28	)	$	6,300
Federal National Mortgage Association	5,223		168			—			5,391
Federal Home Loan Mortgage Corporation	6,753		326			—			7,079
Collateralized mortgage obligations:
Government National Mortgage Association	1,006,238		48,748			(91		)	1,054,895
Federal National Mortgage Association	18,463		657			—			19,120
Federal Home Loan Mortgage Corporation	257,141		24,045			—			281,186
Total collateralized mortgage obligations	1,281,842		73,450			(91		)	1,355,201
Total securities held to maturity	$	1,299,806	$	74,284		$	(119	)	$	1,373,971
Investment securities in an unrealized loss position	'
	The table below details certain information regarding our investment securities that were in an unrealized loss position at the dates indicated by the length of time those securities were in a continuous loss position:
		Less than 12 months								12 months or longer						Total
		Fair		Unrealized						Fair		Unrealized				Fair		Unrealized
	30-Sep-13	value		losses			Count			value		losses			Count	value		losses			Count
	Investment securities available for sale:
	Debt securities:
	States and political subdivisions	$	27,131	$	(313	)	46			$	274	$	(7	)	1	$	27,405	$	(320	)	47
	U.S. government agencies	—		—			—			2,136		(14		)	3	2,136		(14		)	3
	U.S. government sponsored enterprises	69,974		(678		)	6			—		—			—	69,974		(678		)	6
	Corporate	354,076		(15,403		)	242			39,430		(1,323		)	11	393,506		(16,726		)	253
	Trust preferred securities	—		—			—			5,340		(626		)	3	5,340		(626		)	3
	Total debt securities	451,181		(16,394		)	294			47,180		(1,970		)	18	498,361		(18,364		)	312
	Mortgage-backed securities:
	Residential mortgage-backed securities:
	Government National Mortgage Association	19,648		(1,681		)	6			—		—			—	19,648		(1,681		)	6
	Federal National Mortgage Association	707		(10		)	7			—		—			—	707		(10		)	7
	Collateralized mortgage obligations:
	Federal National Mortgage Association	683,277		(22,805		)	37			—		—			—	683,277		(22,805		)	37
	Federal Home Loan Mortgage Corporation	373,987		(10,824		)	18			—		—			—	373,987		(10,824		)	18
	Non-agency issued	1,138		(8		)	4			—		—			—	1,138		(8		)	4
	Total collateralized mortgage obligations	1,058,402		(33,637		)	59			—		—			—	1,058,402		(33,637		)	59
	Total residential mortgage-backed securities	1,078,757		(35,328		)	72			—		—			—	1,078,757		(35,328		)	72
	Commercial mortgage-backed securities, non-agency issued	144,576		(1,852		)	18			1,868		(15		)	1	146,444		(1,867		)	19
	Total mortgage-backed securities	1,223,333		(37,180		)	90			1,868		(15		)	1	1,225,201		(37,195		)	91
	Collateralized loan obligations, non-agency issued	177,557		(1,594		)	21			—		—			—	177,557		(1,594		)	21
	Asset-backed securities collateralized by:
	Student loans	65,470		(382		)	9			—		—			—	65,470		(382		)	9
	Credit card	36,079		(408		)	4			—		—			—	36,079		(408		)	4
	Auto loans	37,187		(508		)	9			—		—			—	37,187		(508		)	9
	Other	73,477		(1,066		)	12			87		(1		)	1	73,564		(1,067		)	13
	Total asset-backed securities	212,213		(2,364		)	34			87		(1		)	1	212,300		(2,365		)	35
	Other	22,181		(259		)	5			—		—			—	22,181		(259		)	5
	Total securities available for sale in an unrealized loss position	$	2,086,465	$	(57,791	)	444			$	49,135	$	(1,986	)	20	$	2,135,600	$	(59,777	)	464
		Less than 12 months								12 months or longer						Total
		Fair		Unrealized						Fair		Unrealized				Fair		Unrealized
	30-Sep-13	value		losses			Count			value		losses			Count	value		losses			Count
	Investment securities held to maturity:
	Residential mortgage-backed securities:
	Government National Mortgage Association	$	11,287	$	(106	)	4			$	—	$	—		—	$	11,287	$	(106	)	4
	Federal National Mortgage Association	138,981		(2,545		)	39			—		—			—	138,981		(2,545		)	39
	Federal Home Loan Mortgage Corporation	68,468		(580		)	18			—		—			—	68,468		(580		)	18
	Collateralized mortgage obligation:
	Government National Mortgage Association	104,281		(1,433		)	14			—		—			—	104,281		(1,433		)	14
	Federal National Mortgage Association	913,806		(31,712		)	50			—		—			—	913,806		(31,712		)	50
	Federal Home Loan Mortgage Corporation	609,355		(20,885		)	41			—		—			—	609,355		(20,885		)	41
	Total collateralized mortgage obligations	1,627,442		(54,030		)	105			—		—			—	1,627,442		(54,030		)	105
	Total securities held to maturity in an unrealized loss position	$	1,846,178	$	(57,261	)	166			$	—	$	—		—	$	1,846,178	$	(57,261	)	166
		Less than 12 months								12 months or longer						Total
		Fair		Unrealized						Fair		Unrealized				Fair		Unrealized
	31-Dec-12	value		losses			Count			value		losses			Count	value		losses			Count
	Investment securities available for sale:
	Debt securities:
	States and political subdivisions	$	21,373	$	(98	)	42			$	4,311	$	(46	)	5	$	25,684	$	(144	)	47
	U.S. government agencies	—		—			—			2,237		(3		)	2	2,237		(3		)	2
	Corporate	92,190		(2,168		)	27			44,085		(915		)	2	136,275		(3,083		)	29
	Trust preferred securities	1,005		(13		)	1			13,190		(1,316		)	6	14,195		(1,329		)	7
	Total debt securities	114,568		(2,279		)	70			63,823		(2,280		)	15	178,391		(4,559		)	85
	Mortgage-backed securities:
	Residential mortgage-backed securities:
	Government National Mortgage Association	22,604		(197		)	6			—		—			—	22,604		(197		)	6
	Federal National Mortgage Association	1,244		(22		)	7			315		(8		)	2	1,559		(30		)	9
	Collateralized mortgage obligations:
	Federal National Mortgage Association	232,290		(940		)	12			—		—			—	232,290		(940		)	12
Federal Home Loan Mortgage Corporation	118,020		(295		)	6			—		—			—	118,020		(295		)	6
Non-agency issued	—		—			—			4,123		(25		)	1	4,123		(25		)	1
Total collateralized mortgage obligations	350,310		(1,235		)	18			4,123		(25		)	1	354,433		(1,260		)	19
Total residential mortgage-backed securities	374,158		(1,454		)	31			4,438		(33		)	3	378,596		(1,487		)	34
Commercial mortgage-backed securities, non-agency issued	29,660		(613		)	5			31,567		(678		)	4	61,227		(1,291		)	9
Total mortgage-backed securities	403,818		(2,067		)	36			36,005		(711		)	7	439,823		(2,778		)	43
Collateralized loan obligations, non-agency issued	167,997		(854		)	25			—		—			—	167,997		(854		)	25
Asset-backed securities collateralized by:
Student loans	2,055		(53		)	1			25,641		(81		)	1	27,696		(134		)	2
Credit cards	5,987		(12		)	2			—		—			—	5,987		(12		)	2
Auto loans	41,605		(43		)	7			—		—			—	41,605		(43		)	7
Other	4,500		(3		)	2			97		(4		)	1	4,597		(7		)	3
Total asset-backed securities	54,147		(111		)	12			25,738		(85		)	2	79,885		(196		)	14
Other	—		—			—			7,936		(92		)	3	7,936		(92		)	3
Total securities available for sale in an unrealized loss position	$	740,530	$	(5,311	)	143			$	133,502	$	(3,168	)	27	$	874,032	$	(8,479	)	170
Investment securities held to maturity:
Residential mortgage-backed securities:
Government National Mortgage Association	$	1,959	$	(28	)	1			$	—	$	—		—	$	1,959	$	(28	)	1
Collateralized mortgage obligations:
Government National Mortgage Association	23,485		(91		)	2			—		—			—	23,485		(91		)	2
Total securities held to maturity in an unrealized loss position	$	25,444	$	(119	)	3			$	—	$	—		—	$	25,444	$	(119	)	3
Scheduled contractual maturities of investment securities	'
	Scheduled contractual maturities of our investment securities at September 30, 2013 were as follows:
		Amortized cost		Fair value
	Debt securities:
	Within one year	$	224,911	$	227,171
	After one year through five years	899,393		925,249
	After five years through ten years	601,962		593,531
	After ten years	20,037		18,893
	Total debt securities	1,746,303		1,764,844
	Mortgage-backed securities	7,218,554		7,272,025
	Collateralized loan obligations	1,424,309		1,466,125
	Asset-backed securities	905,137		914,244
	Other	32,503		32,301
		$	11,326,806	$	11,449,539
Schedule of available for sale securities transferred to held to maturity securities	'
	On March 29, 2013, we transferred $3 billion of residential mortgage-backed securities from available for sale to held to maturity. The amortized cost, unrealized gains and losses, and fair value of these transferred investment securities immediately prior to the transfer are as follows:
		Amortized		Unrealized			Unrealized			Fair
		cost		gains			losses			value
	Residential mortgage-backed securities:
	Government National Mortgage Association	$	14,615	$	748		$	—		$	15,363
	Federal National Mortgage Association	173,196		11,716			(15		)	184,897
	Federal Home Loan Mortgage Corporation	96,468		5,224			—			101,692
	Collateralized mortgage obligations:
	Government National Mortgage Association	884,677		25,759			—			910,436
	Federal National Mortgage Association	1,019,254		9,244			(2,703		)	1,025,795
	Federal Home Loan Mortgage Corporation	758,248		6,664			(1,765		)	763,147
	Total collateralized mortgage obligations	2,662,179		41,667			(4,468		)	2,699,378
	Total residential mortgage-backed securities	$	2,946,458	$	59,355		$	(4,483	)	$	3,001,330

Loans_and_Leases_Tables

Loans and Leases (Tables)	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Summary of loans and leases	'
	Our loans and leases receivable consisted of the following at the dates indicated:
		30-Sep-13										31-Dec-12
		Originated			Acquired			Total				Originated			Acquired			Total
	Commercial:
	Real estate	$	5,321,251		$	1,566,576		$	6,887,827			$	4,491,440		$	1,974,607		$	6,466,047
	Construction	772,362			37,218			809,580				552,265			74,881			627,146
	Business	4,741,050			463,622			5,204,672				4,286,331			666,992			4,953,323
	Total commercial	10,834,663			2,067,416			12,902,079				9,330,036			2,716,480			12,046,516
	Consumer:
	Residential real estate	1,882,628			1,636,605			3,519,233				1,724,134			2,037,433			3,761,567
	Home equity	1,536,935			1,169,668			2,706,603				1,286,243			1,365,648			2,651,891
	Indirect auto	1,339,449			—			1,339,449				601,456			—			601,456
	Credit cards	311,600			—			311,600				215,001			99,972			314,973
	Other consumer	306,230			3,877			310,107				215,487			118,122			333,609
	Total consumer	5,376,842			2,810,150			8,186,992				4,042,321			3,621,175			7,663,496
	Total loans and leases	16,211,505			4,877,566			21,089,071				13,372,357			6,337,655			19,710,012
	Allowance for loan losses	(194,992		)	(2,961		)	(197,953		)		(160,958		)	(1,564		)	(162,522		)
	Total loans and leases, net	$	16,016,513		$	4,874,605		$	20,891,118			$	13,211,399		$	6,336,091		$	19,547,490
The outstanding principal balance and the related carrying amount of acquired loans	'
		September 30,			December 31,
		2013			2012
	Credit impaired acquired loans evaluated individually for future credit losses
	Outstanding principal balance	$	20,286		$	31,032
	Carrying amount	13,800			24,157
	Acquired loans evaluated collectively for future credit losses
	Outstanding principal balance	3,602,822			4,773,965
	Carrying amount	3,533,103			4,690,143
	Other acquired loans
	Outstanding principal balance	1,381,794			1,695,979
	Carrying amount	1,330,663			1,623,355
	Total acquired loans
	Outstanding principal balance	5,004,902			6,500,976
	Carrying amount	4,877,566			6,337,655
Changes in the accretable discount on loans acquired	'
	The following table presents changes in the accretable yield, which includes income recognized from contractual interest cash flows, for the dates indicated. Acquired lines of credit accounted for under ASC 310-20 are not included in this table.
	Balance at January 1, 2012	$	(1,186,900	)
	HSBC acquisition	(90,670		)
	Net reclassifications from nonaccretable yield	(28,095		)
	Accretion	248,533
	Balance at December 31, 2012	(1,057,132		)
	Reclassifications from nonaccretable yield	(14,362		)
	Accretion	156,497
	Other (1)	21,722
	Balance at September 30, 2013	$	(893,275	)
	(1)	Includes changes in expected cash flows from changes in interest rate and prepayment assumptions.
Activity in the allowance for credit losses	'
	The following table presents the activity in our allowance for loan losses on originated loans and related recorded investment of the associated loans in our originated loan portfolio segment for the periods indicated:
		Commercial							Consumer
	Originated loans	Real estate			Business				Residential			Home equity			Other			Total
															consumer
	Nine months ended September 30, 2013
	Allowance for loan losses:
	Balance at beginning of period	$	37,550		$	99,188			$	4,515		$	4,716		$	14,989		$	160,958
	Provision for loan losses	5,637			41,897				(1,552		)	2,981			19,298			68,261
	Charge-offs	(6,103		)	(23,477		)		(1,256		)	(2,072		)	(10,010		)	(42,918		)
	Recoveries	3,851			1,706				401			232			2,501			8,691
	Balance at end of period	$	40,935		$	119,314			$	2,108		$	5,857		$	26,778		$	194,992
	Allowance for loan losses:
	Individually evaluated for impairment	$	1,744		$	4,587			$	1,084		$	2,439		$	68		$	9,922
	Collectively evaluated for impairment	39,191			114,727				1,024			3,418			26,710			185,070
	Total	$	40,935		$	119,314			$	2,108		$	5,857		$	26,778		$	194,992
	Loans receivable:
	Balance at end of period
	Individually evaluated for impairment	$	81,934		$	57,916			$	20,483		$	6,007		$	3,627		$	169,967
	Collectively evaluated for impairment	6,011,679			4,683,134				1,862,145			1,530,928			1,953,652			16,041,538
	Total	$	6,093,613		$	4,741,050			$	1,882,628		$	1,536,935		$	1,957,279		$	16,211,505
	Nine months ended September 30, 2012
	Allowance for loan losses:
	Balance at beginning of period	$	50,007		$	57,348			$	4,101		$	4,374		$	2,362		$	118,192
	Provision for loan losses	(8,021		)	56,634				2,409			2,604			8,669			62,295
	Charge-offs	(5,518		)	(23,131		)		(1,965		)	(3,508		)	(3,035		)	(37,157		)
	Recoveries	556			1,954				294			411			1,171			4,386
	Allowance related to loans sold	(88		)	(187		)		(66		)	(121		)	(45		)	(507		)
	Balance at end of period	$	36,936		$	92,618			$	4,773		$	3,760		$	9,122		$	147,209
	Allowance for loan losses:
	Individually evaluated for impairment	$	2,047		$	5,090			$	2,373		$	360		$	21		$	9,891
	Collectively evaluated for impairment	34,889			87,528				2,400			3,400			9,101			137,318
	Total	$	36,936		$	92,618			$	4,773		$	3,760		$	9,122		$	147,209
	Loans receivable:
	Balance at end of period
	Individually evaluated for impairment	$	62,708		$	47,947			$	17,756		$	4,738		$	1,511		$	134,660
	Collectively evaluated for impairment	4,644,029			3,833,198				1,684,031			1,226,818			709,832			12,097,908
	Total	$	4,706,737		$	3,881,145			$	1,701,787		$	1,231,556		$	711,343		$	12,232,568
		Commercial							Consumer
	Originated loans	Real estate			Business				Residential			Home equity			Other			Total
															consumer
	Three months ended September 30, 2013
	Allowance for loan losses:
	Balance at beginning of period	$	43,258		$	106,597			$	2,630		$	5,505		$	24,460		$	182,450
	Provision for loan losses	(3,327		)	22,411				(385		)	674			6,059			25,432
	Charge-offs	(2,312		)	(10,163		)		(161		)	(395		)	(4,799		)	(17,830		)
	Recoveries	3,316			469				24			73			1,058			4,940
	Balance at end of period	$	40,935		$	119,314			$	2,108		$	5,857		$	26,778		$	194,992
	Three months ended September 30, 2012
	Allowance for loan losses:
	Balance at beginning of period	$	44,927		$	75,708			$	5,076		$	4,971		$	4,514		$	135,196
	Provision for loan losses	(6,536		)	23,147				107			(771		)	5,446			21,393
	Charge-offs	(1,508		)	(6,500		)		(410		)	(545		)	(1,179		)	(10,142		)
	Recoveries	123			424				14			145			368			1,074
	Allowance related to loans sold	(70		)	(161		)		(14		)	(40		)	(27		)	(312		)
	Balance at end of period	$	36,936		$	92,618			$	4,773		$	3,760		$	9,122		$	147,209
	The following table presents the activity in our allowance for loan losses and related recorded investment of the associated loans in our acquired loan portfolio for the periods indicated:
		Commercial							Consumer
	Acquired loans	Real estate			Business				Residential			Home equity			Other			Total
															consumer
	Nine months ended September 30, 2013
	Allowance for loan losses:
	Balance at beginning of period	$	—		$	—			$	60		$	290		$	1,214		$	1,564
	Provision for loan losses	1,724			—				859			1,700			(744		)	3,539
Charge-offs	(1,772		)	—				—			—			(547		)	(2,319		)
Recoveries	100			—				—			—			77			177
Balance at end of period	$	52		$	—			$	919		$	1,990		$	—		$	2,961
Allowance for loan losses:
Individually evaluated for impairment	$	—		$	—			$	—		$	—		$	—		$	—
Collectively evaluated for impairment	52			—				919			1,990			—			2,961
Total	$	52		$	—			$	919		$	1,990		$	—		$	2,961
Loans receivable:
Balance at end of period
Individually evaluated for impairment	$	999		$	9,430			$	—		$	3,324		$	—		$	13,753
Collectively evaluated for impairment	—			338,788				—			975,244			3,877			1,317,909
Loans acquired with deteriorated credit quality	1,602,795			115,404				1,636,605			191,100			—			3,545,904
Total	$	1,603,794		$	463,622			$	1,636,605		$	1,169,668		$	3,877		$	4,877,566
Nine months ended September 30, 2012
Allowance for loan losses:
Balance at beginning of period	$	—		$	—			$	60		$	50		$	1,798		$	1,908
Provision for loan losses	5,208			—				—			—			2,000			7,208
Charge-offs	(5,467		)	—				—			—			(1,359		)	(6,826		)
Recoveries	259			—				—			—			175			434
Balance at end of period	$	—		$	—			$	60		$	50		$	2,614		$	2,724
Allowance for loan losses:
Individually evaluated for impairment	$	—		$	—			$	—		$	—		$	—		$	—
Collectively evaluated for impairment	—			—				60			50			2,614			2,724
Total	$	—		$	—			$	60		$	50		$	2,614		$	2,724
Loans receivable:
Balance at end of period
Individually evaluated for impairment	$	1,356		$	7,998			$	—		$	2,341		$	—		$	11,695
Collectively evaluated for impairment	—			534,204				—			1,072,200			252,718			1,859,122
Loans acquired with deteriorated credit quality	2,127,878			258,807				2,168,969			355,332			92,155			5,003,141
Total	$	2,129,234		$	801,009			$	2,168,969		$	1,429,873		$	344,873		$	6,873,958
	Commercial							Consumer
Acquired loans	Real estate			Business				Residential			Home equity			Other			Total
														consumer
Three months ended September 30, 2013
Allowance for loan losses:
Balance at beginning of period	$	42		$	—			$	60		$	290		$	866		$	1,258
Provision for loan losses	—			—				859			1,700			(791		)	1,768
Charge-offs	—			—				—			—			(106		)	(106		)
Recoveries	10			—				—			—			31			41
Balance at end of period	$	52		$	—			$	919		$	1,990		$	—		$	2,961
Three months ended September 30, 2012
Allowance for loan losses:
Balance at beginning of period	$	—		$	—			$	60		$	50		$	3,210		$	3,320
Provision for loan losses	407			—				—			—			—			407
Charge-offs	(468		)	—				—			—			(658		)	(1,126		)
Recoveries	61			—				—			—			62			123
Balance at end of period	$	—		$	—			$	60		$	50		$	2,614		$	2,724
Summary of nonperforming loans	'
	Our nonperforming loans consisted of the following at the dates indicated:
		September 30, 2013										December 31, 2012
		Originated			Acquired			Total				Originated			Acquired			Total
	Commercial:
	Real estate	$	51,302		$	998		$	52,300			$	50,848		$	1,120		$	51,968
	Business	35,854			11,172			47,026				47,066			8,932			55,998
	Total commercial	87,156			12,170			99,326				97,914			10,052			107,966
	Consumer:
	Residential real estate	31,312			—			31,312				27,192			—			27,192
	Home equity	15,709			17,901			33,610				14,233			19,205			33,438
	Other consumer	10,667			317			10,984				3,737			391			4,128
	Total consumer	57,688			18,218			75,906				45,162			19,596			64,758
	Total	$	144,844		$	30,388		$	175,232			$	143,076		$	29,648		$	172,724
Additional interest income if loans were performing	'
	The table below provides information about the interest income that would have been recognized if our nonperforming loans had performed in accordance with terms for the periods indicated:
		Three months ended							Nine months ended
		September 30,							September 30,
		2013			2012				2013			2012
	Additional interest income that would have been recorded if nonperforming loans had performed in accordance with original terms	$	1,860		$	2,157			$	5,398		$	5,287
Summary of impaired loans	'
		30-Sep-13										31-Dec-12
	Originated loans	Recorded			Unpaid			Related				Recorded			Unpaid			Related
		investment			principal			allowance				investment			principal			allowance
					balance										balance
	With no related allowance recorded:
	Commercial:
	Real estate	$	62,495		$	84,613		$	—			$	41,964		$	54,926		$	—
	Business	47,215			71,313			—				34,336			57,442			—
	Total commercial	109,710			155,926			—				76,300			112,368			—
	Consumer:
	Residential real estate	15,573			18,762			—				6,315			6,473			—
	Home equity	1,102			1,328			—				2,992			3,406			—
	Other consumer	1,844			2,190			—				1,830			1,924			—
	Total consumer	18,519			22,280			—				11,137			11,803			—
	Total	$	128,229		$	178,206		$	—			$	87,437		$	124,171		$	—
	With a related allowance recorded
	Commercial:
	Real estate	$	19,439		$	24,379		$	1,744			$	24,550		$	37,037		$	2,640
	Business	10,701			20,190			4,587				23,873			31,271			4,755
	Total commercial	30,140			44,569			6,331				48,423			68,308			7,395
	Consumer:
	Residential real estate	4,910			5,651			1,084				13,191			13,918			3,074
	Home equity	4,905			5,664			2,439				2,406			2,583			801
	Other consumer	1,783			1,963			68				79			99			10
	Total consumer	11,598			13,278			3,591				15,676			16,600			3,885
	Total	$	41,738		$	57,847		$	9,922			$	64,099		$	84,908		$	11,280
	Total
	Commercial:
	Real estate	$	81,934		$	108,992		$	1,744			$	66,514		$	91,963		$	2,640
	Business	57,916			91,503			4,587				58,209			88,713			4,755
	Total commercial	139,850			200,495			6,331				124,723			180,676			7,395
	Consumer:
	Residential real estate	20,483			24,413			1,084				19,506			20,391			3,074
	Home equity	6,007			6,992			2,439				5,398			5,989			801
	Other consumer	3,627			4,153			68				1,909			2,023			10
	Total consumer	30,117			35,558			3,591				26,813			28,403			3,885
	Total	$	169,967		$	236,053		$	9,922			$	151,536		$	209,079		$	11,280
	The following table provides information about our impaired acquired loans with no related allowance at the dates indicated. The remaining credit mark is considered adequate to cover any loss on these balances.
		30-Sep-13										31-Dec-12
	Acquired loans	Recorded			Unpaid			Related				Recorded			Unpaid principal balance			Related
		investment			principal			allowance				investment						allowance
					balance
	Commercial:
	Real estate	$	999		$	4,447		$	—			$	1,130		$	4,652		$	—
	Business	9,430			10,293			—				6,656			7,436			—
	Total commercial	10,429			14,740			—				7,786			12,088			—
	Consumer:
	Residential real estate	—			—			—				—			—			—
	Home equity	3,324			4,413			—				2,345			3,470			—
	Other consumer	—			—			—				17			17			—
	Total consumer	3,324			4,413			—				2,362			3,487			—
	Total(1)	$	13,753		$	19,153		$	—			$	10,148		$	15,575		$	—
	(1)Includes nonaccrual purchased credit impaired loans.
	The following table provides information about our impaired originated loans including the average recorded investment and interest income recognized on impaired loans for the periods indicated:
		September 30,
		2013							2012
	Originated loans	Average			Interest				Average			Interest
		recorded			income				recorded			income
		investment			recognized				investment			recognized
	Nine months ended
	Commercial:
	Real estate	$	88,046		$	1,213			$	67,480		$	1,112
	Business	59,391			689				49,318			597
Total commercial	147,437			1,902				116,798			1,709
Consumer:
Residential real estate	23,421			352				14,102			340
Home equity	6,096			47				2,558			74
Other consumer	3,836			33				556			31
Total consumer	33,353			432				17,216			445
Total	$	180,790		$	2,334			$	134,014		$	2,154
Three months ended
Commercial:
Real estate	$	87,903		$	410			$	63,721		$	548
Business	60,077			293				42,807			315
Total commercial	147,980			703				106,528			863
Consumer:
Residential real estate	20,755			182				17,789			134
Home equity	6,091			18				4,825			43
Other consumer	3,072			24				1,512			30
Total consumer	29,918			224				24,126			207
Total	$	177,898		$	927			$	130,654		$	1,070
The following table provides information about our impaired acquired loans including the average recorded investment and interest income recognized on impaired loans for the periods indicated:
	September 30,
	2013							2012
Acquired loans	Average			Interest				Average			Interest
	recorded			income				recorded			income
	investment			recognized				investment			recognized
Nine months ended
Commercial:
Real estate	$	1,139		$	—			$	1,605		$	—
Business	9,532			—				8,375			—
Total commercial	10,671			—				9,980			—
Consumer:
Residential real estate	—			—				—			—
Home equity	3,336			3				780			26
Other consumer	—			—				—			—
Total consumer	3,336			3				780			26
Total(1)	$	14,007		$	3			$	10,760		$	26
Three months ended
Commercial:
Real estate	$	1,065		$	—			$	678		$	—
Business	8,020			—				5,423			—
Total commercial	9,085			—				6,101			—
Consumer:
Residential real estate	—			—				—			—
Home equity	3,265			1				2,341			26
Other consumer	—			—				—			—
Total consumer	3,265			1				2,341			26
Total(1)	$	12,350		$	1			$	8,442		$	26
-1	Included nonaccrual purchased credit impaired loans.
Reconciliation between nonaccrual loans and impaired loans	'
		Commercial			Consumer			Total
	30-Sep-13
	Nonaccrual loans	$	99,326		$	75,906		$	175,232
	Plus: Accruing TDRs	61,893			7,984			69,877
	Less: Smaller balance nonaccrual loans evaluated collectively when determining the allowance for loan losses	(10,940		)	(50,449		)	(61,389		)
	Total impaired loans(1)	$	150,279		$	33,441		$	183,720
	December 31, 2012:
	Nonaccrual loans	$	107,966		$	64,758		$	172,724
	Plus: Accruing TDRs	36,380			9,900			46,280
	Less: Smaller balance nonaccrual loans evaluated collectively when determining the allowance for loan losses	(11,837		)	(45,483		)	(57,320		)
	Total impaired loans(1)	$	132,509		$	29,175		$	161,684
	(1)	Includes nonaccrual purchased credit impaired loans.
Aging analysis of loans	'
		30-59 days			60-89 days			Greater than			Total			Current			Total loans			Greater than
		past due			past due			90 days			past due						receivable			90 days
								past due												and accruing (1)
	30-Sep-13
	Originated loans
	Commercial:
	Real estate	$	5,590		$	878		$	33,865		$	40,333		$	6,053,280		$	6,093,613		$	—
	Business	8,094			5,135			23,232			36,461			4,704,589			4,741,050			27
	Total commercial	13,684			6,013			57,097			76,794			10,757,869			10,834,663			27
	Consumer:
	Residential real estate	6,597			1,732			21,584			29,913			1,852,715			1,882,628			—
	Home equity	3,413			1,688			10,685			15,786			1,521,149			1,536,935			—
	Other consumer	11,827			4,021			7,513			23,361			1,933,918			1,957,279			2,407
	Total consumer	21,837			7,441			39,782			69,060			5,307,782			5,376,842			2,407
	Total	$	35,521		$	13,454		$	96,879		$	145,854		$	16,065,651		$	16,211,505		$	2,434
	Acquired loans
	Commercial:
	Real estate	$	8,523		$	5,249		$	58,229		$	72,001		$	1,531,793		$	1,603,794		$	57,231
	Business	5,575			418			10,638			16,631			446,991			463,622			5,165
	Total commercial	14,098			5,667			68,867			88,632			1,978,784			2,067,416			62,396
	Consumer:
	Residential real estate	19,876			10,261			65,985			96,122			1,540,483			1,636,605			65,985
	Home equity	7,459			2,761			18,507			28,727			1,140,941			1,169,668			5,433
	Other consumer	439			146			317			902			2,975			3,877			—
	Total consumer	27,774			13,168			84,809			125,751			2,684,399			2,810,150			71,418
	Total	$	41,872		$	18,835		$	153,676		$	214,383		$	4,663,183		$	4,877,566		$	133,814
	31-Dec-12
	Originated loans
	Commercial:
	Real estate	$	4,346		$	2,584		$	40,454		$	47,384		$	4,996,321		$	5,043,705		$	3,791
	Business	5,398			4,698			19,237			29,333			4,256,998			4,286,331			315
	Total commercial	9,744			7,282			59,691			76,717			9,253,319			9,330,036			4,106
	Consumer:
	Residential real estate	7,590			2,414			19,241			29,245			1,694,889			1,724,134			—
	Home equity	2,754			1,662			8,991			13,407			1,272,836			1,286,243			—
	Other consumer	6,214			1,230			2,020			9,464			1,022,480			1,031,944			402
	Total consumer	16,558			5,306			30,252			52,116			3,990,205			4,042,321			402
	Total	$	26,302		$	12,588		$	89,943		$	128,833		$	13,243,524		$	13,372,357		$	4,508
	Acquired loans
	Commercial:
	Real estate	$	10,651		$	18,066		$	80,374		$	109,091		$	1,940,397		$	2,049,488		$	79,255
	Business	5,661			1,864			12,864			20,389			646,603			666,992			5,963
	Total commercial	16,312			19,930			93,238			129,480			2,587,000			2,716,480			85,218
	Consumer:
	Residential real estate	24,104			11,917			69,106			105,127			1,932,306			2,037,433			69,106
	Home equity	10,241			5,437			20,705			36,383			1,329,265			1,365,648			7,268
	Other consumer	4,506			2,968			5,859			13,333			204,761			218,094			5,468
	Total consumer	38,851			20,322			95,670			154,843			3,466,332			3,621,175			81,842
	Total	$	55,163		$	40,252		$	188,908		$	284,323		$	6,053,332		$	6,337,655		$	167,060
	(1)	Includes credit card loans, loans that have matured and are in the process of collection, and acquired loans that were originally recorded at fair value upon acquisition. Acquired loans are considered to be accruing as we can reasonably estimate future cash flows on these acquired loans and we expect to fully collect the carrying value of these loans net of the allowance for acquired loan losses. Therefore, we are accreting the difference between the carrying value of these loans and their expected cash flows into interest income.
Information about the credit quality of our commercial loan portfolio	'
		Real estate			Business			Total			Percent of total
	30-Sep-13
	Originated loans:
	Pass	$	5,778,744		$	4,481,784		$	10,260,528		94.7	%
	Criticized:(1)
	Accrual	263,567			223,412			486,979			4.5
	Nonaccrual	51,302			35,854			87,156			0.8
	Total criticized	314,869			259,266			574,135			5.3
	Total	$	6,093,613		$	4,741,050		$	10,834,663		100	%
	Acquired loans:
	Pass	$	1,413,615		$	399,869		$	1,813,484		87.7	%
	Criticized:(1)
	Accrual	189,181			52,581			241,762			11.7
	Nonaccrual	998			11,172			12,170			0.6
	Total criticized	190,179			63,753			253,932			12.3
	Total	$	1,603,794		$	463,622		$	2,067,416		100	%
	31-Dec-12
	Originated loans:
	Pass	$	4,745,600		$	4,069,410		$	8,815,010		94.5	%
	Criticized:(1)
	Accrual	247,257			169,855			417,112			4.5
	Nonaccrual	50,848			47,066			97,914			1
	Total criticized	298,105			216,921			515,026			5.5
	Total	$	5,043,705		$	4,286,331		$	9,330,036		100	%
	Acquired loans:
	Pass	$	1,794,282		$	581,555		$	2,375,837		87.4	%
	Criticized:(1)
	Accrual	254,086			76,505			330,591			12.2
	Nonaccrual	1,120			8,932			10,052			0.4
	Total criticized	255,206			85,437			340,643			12.6
	Total	$	2,049,488		$	666,992		$	2,716,480		100	%
	(1)	Includes special mention, substandard, doubtful, and loss, which are consistent with regulatory definitions, and as described in Item 1, “Business,” under “Asset Quality Review” in our Annual Report on 10-K for the year ended December 31, 2012.
Information about the credit quality of our consumer loan portfolio	'
		Residential			Home equity			Other			Total			Percent of
		real estate						consumer						total
	30-Sep-13
	Originated loans by refreshed FICO score:
	Over 700	$	1,607,573		$	1,266,686		$	1,236,344		$	4,110,603		76.5	%
	660-700	136,743			150,454			379,540			666,737			12.4
	620-660	56,261			61,125			190,880			308,266			5.7
	580-620	33,621			26,741			70,612			130,974			2.4
	Less than 580	38,037			28,327			55,138			121,502			2.3
	No score(1)	10,393			3,602			24,765			38,760			0.7
	Total	$	1,882,628		$	1,536,935		$	1,957,279		$	5,376,842		100	%
	Acquired loans by refreshed FICO score:
	Over 700	$	1,130,390		$	901,936		$	2,055		$	2,034,381		72.4	%
	660-700	125,434			103,897			886			230,217			8.2
	620-660	77,683			63,922			495			142,100			5.1
	580-620	53,207			39,547			243			92,997			3.3
	Less than 580	73,729			38,971			198			112,898			4
	No score(1)	176,162			21,395			—			197,557			7
	Total	$	1,636,605		$	1,169,668		$	3,877		$	2,810,150		100	%
	31-Dec-12
	Originated loans by refreshed FICO score:
	Over 700	$	1,381,565		$	1,009,913		$	589,804		$	2,981,282		73.7	%
	660-700	167,046			148,692			232,474			548,212			13.6
	620-660	67,520			59,085			122,656			249,261			6.2
	580-620	38,570			28,487			45,545			112,602			2.8
	Less than 580	57,794			36,152			36,866			130,812			3.2
	No score(1)	11,639			3,914			4,599			20,152			0.5
	Total	$	1,724,134		$	1,286,243		$	1,031,944		$	4,042,321		100	%
	Acquired loans by refreshed FICO score:
	Over 700	$	1,353,416		$	998,443		$	120,305		$	2,472,164		68.3	%
	660-700	176,620			136,160			35,255			348,035			9.6
	620-660	103,628			83,857			19,380			206,865			5.7
	580-620	72,627			53,708			9,967			136,302			3.8
	Less than 580	109,337			69,664			13,594			192,595			5.3
	No score(1)	221,805			23,816			19,593			265,214			7.3
	Total	$	2,037,433		$	1,365,648		$	218,094		$	3,621,175		100	%
	(1)	Primarily includes loans that are serviced by others for which refreshed FICO scores were not available as of the date indicated.
Aggregate recorded investment of impaired loans with terms through troubled debt restructuring	'
		September 30,			December 31,
		2013			2012
	Aggregate recorded investment of impaired loans with terms modified through a troubled debt restructuring:
	Accruing interest	$	69,877		$	46,280
	Nonaccrual	53,405			42,244
	Total troubled debt restructurings (1)	$	123,282		$	88,524
	(1)	Includes 63 and 44 acquired loans that were restructured with a recorded investment of $3.3 million and $2.9 million at September 30, 2013 and December 31, 2012, respectively.
Financial effects of our modifications	'
	Type of Concession	Count		Postmodification			Premodification			Postmodification
				recorded			allowance for			allowance for
				investment(1)			loan losses			loan losses
	Nine months ended September 30, 2013
	Commercial:
	Commercial real estate
	Extension of term	5		$	9,354		$	634		$	510
	Extension of term and rate reduction	6		15,910			740			438
	Deferral of principal	1		7,782			429			—
	Commercial business
	Extension of term	9		10,237			1,576			185
	Extension of term and rate reduction	7		974			139			232
	Total commercial	28		44,257			3,518			1,365
	Consumer:
	Residential real estate
	Extension of term	2		$	291		$	—		$	23
	Rate reduction	3		109			—			3
	Deferral of principal and extension of term	4		151			—			7
	Extension of term and rate reduction	10		1,930			1			78
	Chapter 7 bankruptcy	12		760			—			11
	Home equity
	Rate reduction	2		126			—			11
	Deferral of principal and extension of term	1		111			—			1
	Extension of term and rate reduction	2		40			—			—
	Chapter 7 Bankruptcy	50		1,866			5			22
	Other consumer
	Rate reduction	1		25			1			1
	Extension of term and rate reduction	1		46			1			—
	Chapter 7 Bankruptcy	112		2,008			31			1
	Total consumer	200		7,463			39			158
	Total	228		$	51,720		$	3,557		$	1,523
	Type of Concession	Count		Postmodification			Premodification			Postmodification
				recorded			allowance for			allowance for
				investment(1)			loan losses			loan losses
	Nine months ended September 30, 2012
	Commercial:
	Commercial real estate
	Extension of term	8		$	10,970		$	993		$	—
	Deferral of principal	1		259			14			—
	Commercial business
	Extension of term	7		3,643			428			4
	Deferral of principal	1		187			—			—
	Rate reduction	1		125			—			—
	Combination of concession types	1		386			6			96
	Total commercial	19		15,570			1,441			100
	Consumer:
	Residential real estate
	Extension of term	1		$	91		$	2		$	7
	Deferral of principal and extension of term	1		613			1			27
	Extension of term and rate reduction	7		830			1			216
	Chapter 7 Bankruptcy	74		5,417			—			—
	Other	18		2,302			3			459
	Home equity
	Extension of term and rate reduction	2		124			—			25
	Chapter 7 Bankruptcy	144		5,636			—			—
	Other	2		69			—			12
	Other consumer
	Chapter 7 Bankruptcy	48		1,442			—			—
	Total consumer	297		16,524			7			746
	Total	316		$	32,094		$	1,448		$	846
	(1)	Postmodification balances approximate premodification balances. The aggregate amount of charge-offs as a result of the restructurings was not significant.
	Type of Concession	Count		Postmodification			Premodification			Postmodification
				recorded			allowance for			allowance for
investment(1)				loan losses			loan losses
Three months ended September 30, 2013
Commercial:
Commercial real estate
Extension of term	1		$	3,104		$	252		$	—
Commercial business
Extension of term	5		2,998			429			15
Extension of term and rate reduction	6		862			123			223
Total commercial	12		6,964			804			238
Consumer:
Residential real estate
Extension of term	1		173			—			12
Deferral of principal and extension of term	2		102			—			7
Extension of term and rate reduction	4		401			—			34
Chapter 7 Bankruptcy	4		324			—			—
Home equity
Rate reduction	1		37			—			1
Deferral of principal and extension of term	1		111			—			1
Extension of term and rate reduction	1		18			—			—
Chapter 7 Bankruptcy	17		545			2			—
Other consumer
Rate reduction	1		25			1			1
Extension of term and rate reduction	1		46			1			—
Chapter 7 Bankruptcy	40		637			16			—
Total consumer	73		2,419			20			56
Total	85		$	9,383		$	824		$	294
Three months ended September 30, 2012
Commercial:
Commercial real estate
Extension of term	1		$	7,497		$	812		$	—
Consumer:
Residential real estate
Chapter 7 Bankruptcy	74		5,417			—			—
Other	12		1,625			2			255
Home equity
Chapter 7 Bankruptcy	144		5,636			—			—
Other	2		69			—			12
Other consumer
Chapter 7 Bankruptcy	48		1,442			—			—
Total consumer	280		14,189			2			267
Total	281		$	21,686		$	814		$	267
(1)	Postmodification balances approximate premodification balances. The aggregate amount of charge-offs as a result of the restructurings was not significant.
Recorded investment in loan which have been modified and redefaulted	'
	The recorded investment in loans modified as TDRs within 12 months of the balance sheet date and for which there was a payment default during the periods indicated are shown below:
		Three months ended September 30,							Nine months ended September 30,
		2013			2012				2013			2012
	Commercial:
	Real estate	$	—		$	239			$	—		$	638
	Business	—			380				—			1,087
	Total commercial	—			619				—			1,725
	Consumer:
	Residential real estate	—			—				—			—
	Home equity	—			—				76			—
	Other consumer	—			—				—			—
	Total consumer	—			—				76			—
	Total	$	—		$	619			$	76		$	1,725
Information about residential mortgage banking activities	'
	The following table provides information about our residential mortgage banking activities at the dates indicated:
		September 30,
		2013			2012
	Mortgages serviced for others	$	3,574,124		$	2,658,722
	Mortgage servicing asset recorded for loans serviced for others, net	33,571			23,136

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative financial instruments	'
	Our derivative positions include both instruments that are designated as hedging instruments and instruments that are customer related and not designated in hedging relationships. The following table presents information regarding our derivative financial instruments at the dates indicated:
		Asset derivatives							Liability derivatives
		Notional			Fair value  (1)				Notional			Fair value  (2)
		amount							amount
	30-Sep-13
	Derivatives designated as hedging instruments:
	Interest rate swap agreements	$	6,776		$	172			$	26,379		$	1,225
	Derivatives not designated as hedging instruments:
	Interest rate swap agreements	2,925,073			72,173				2,915,576			71,810
	Total derivatives	$	2,931,849		$	72,345			$	2,941,955		$	73,035
	31-Dec-12
	Derivatives designated as hedging instruments:
	Interest rate swap agreements	$	—		$	—			$	14,607		$	1,983
	Derivatives not designated as hedging instruments:
	Interest rate swap agreements	2,195,025			102,069				2,195,025			102,714
	Total derivatives	$	2,195,025		$	102,069			$	2,209,632		$	104,697
	(1)	Represents gross amounts, included in Other Assets in our Consolidated Statements of Condition.
	(2)	Represents gross amounts, included in Other Liabilities in our Consolidated Statements of Condition.
Amounts recognized for derivative financial instruments	'
	The following table presents information about amounts recognized for our derivative financial instruments designated in cash flow hedging relationships for the periods indicated:
		Three months ended September 30,								Nine months ended September 30,
	Cash Flow Hedges	2013				2012				2013				2012
	Interest rate swap agreements:
	Amount of gain on derivatives recognized in other comprehensive income, net of tax	$	184			$	177			$	530			$	6,536
	Amount of (loss) on derivatives reclassified from other comprehensive income to income	(286		)	(1)	(286		)	(1)	(848		)	(1)	(15,146		)	(2)
	(1)	Recognized in interest expense on borrowings in our Consolidated Statements of Income.
	(2)	Of this amount, $11.7 million was recognized in merger and acquisition integration expenses when the associated borrowings were repaid in connection with the HSBC Branch Acquisition and $3.4 million was recognized in interest expense on borrowings in our Consolidated Statements of Income.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Computation of basic and diluted earnings per share using two-class method	'
	The following table is a computation of our basic and diluted earnings per share using the two-class method for the periods indicated:
		Three months ended September 30,						Nine months ended September 30,
		2013			2012			2013			2012
	Net income available to common stockholders	$	71,596		$	50,837		$	194,921		$	87,116
	Less income allocable to unvested restricted stock awards	453			200			1,030			283
	Net income allocable to common stockholders	$	71,143		$	50,637		$	193,891		$	86,833
	Weighted average common shares outstanding:
	Total shares issued	366,002			366,002			366,002			366,002
	Unallocated employee stock ownership plan shares	(2,090		)	(2,267		)	(2,134		)	(2,289		)
	Unvested restricted stock awards	(2,224		)	(1,377		)	(1,818		)	(1,117		)
	Treasury shares	(12,035		)	(13,357		)	(12,558		)	(13,640		)
	Total basic weighted average common shares outstanding	349,653			349,001			349,492			348,956
	Incremental shares from assumed exercise of stock options	14			—			—			—
	Incremental shares from assumed vesting of restricted stock awards	1,229			370			876			292
	Total diluted weighted average common shares outstanding	350,896			349,371			350,368			349,248
	Basic earnings per common share	$	0.2		$	0.15		$	0.55		$	0.25
	Diluted earnings per common share	$	0.2		$	0.14		$	0.55		$	0.25
	Anti-dilutive stock options and restricted stock awards excluded from the diluted weighted average common share calculations	11,099			12,629			11,396			11,867

Other_Comprehensive_Income_Tab

Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Schedule of Comprehensive Income (Loss)	'
	The following table presents the activity in our Other Comprehensive Income for the periods indicated:
		Three months ended September 30,										Nine months ended September 30,
		Pretax			Income taxes			Net				Pretax			Income taxes			Net
	2013
	Securities available for sale:
	Net unrealized holding losses arising during the period	$	(11,514	)	$	(4,302	)	$	(7,212	)		$	(155,943	)	$	(59,719	)	$	(96,224	)
	Reclassification adjustment for net unrealized holding gains on securities transferred between available for sale and held to maturity	—			—			—				(54,872		)	(21,049		)	(33,823		)
	Net unrealized losses on securities available for sale	(11,514		)	(4,302		)	(7,212		)		(210,815		)	(80,768		)	(130,047		)
	Net unrealized holding gains on securities transferred between available for sale and held to maturity:
	Net unrealized holding gains transferred during the period	—			—			—				54,872			21,049			33,823
	Amortization of net unrealized holding gains to income during the period	(6,325		)	(2,426		)	(3,899		)	(1)	(15,673		)	(6,006		)	(9,667		)	(1)
	Net unrealized holding (losses) gains on securities transferred during the period	(6,325		)	(2,426		)	(3,899		)		39,199			15,043			24,156
	Interest rate swaps designated as cash flow hedges:
	Reclassification adjustment for realized losses included in net income	286			102			184			(2)	848			318			530			(2)
	Pension and post-retirement plans:
	Amortization of net loss related to pension and post-retirement plans	48			—			48				143			—			143
	Total other comprehensive loss	$	(17,505	)	$	(6,626	)	$	(10,879	)		$	(170,625	)	$	(65,407	)	$	(105,218	)
		Three months ended September 30,										Nine months ended September 30,
		Pretax			Income taxes			Net				Pretax			Income taxes			Net
	2012
	Securities available for sale:
	Net unrealized holding gains arising during the period	$	114,086		$	43,169		$	70,917			$	172,098		$	65,727		$	106,371
	Reclassification adjustment for realized (gains) included in net income	—			—			—				(15,895		)	(6,097		)	(9,798		)
	Reclassification adjustment for net unrealized holding gains on securities transferred between available for sale and held to maturity	—			—			—				4,054			1,556			2,498
	Net unrealized gains on securities available for sale	114,086			43,169			70,917				160,257			61,186			99,071
	Net unrealized holding gains on securities transferred between available for sale and held to maturity:
	Reclassification adjustment for net unrealized holding gains on securities transferred	—			—			—				(4,054		)	(1,556		)	(2,498		)
	Amortization of net unrealized holding gains to income during the period	(682		)	(260		)	(422		)	(1)	(2,011		)	(749		)	(1,262		)	(1)
	Net unrealized holding gains on securities transferred	(682		)	(260		)	(422		)		(6,065		)	(2,305		)	(3,760		)
	Interest rate swaps designated as cash flow hedges:
	Net unrealized gains arising during the period	—			—			—				(4,590		)	(1,789		)	(2,801		)
	Reclassification adjustment for realized losses included in net income	286			109			177			(2)	15,146			5,809			9,337			(2)
	Net unrealized losses on interest rate swaps designated as cash flow hedges	286			109			177				10,556			4,020			6,536
	Pension and postretirement plans:
	Pension remeasurement	—			—			—				7,461			2,849			4,612
	Amortization of net loss related to pension and post-retirement plans	362			139			223				1,128			584			544
	Total pension and post-retirement plans	362			139			223				8,589			3,433			5,156
	Total other comprehensive income	$	114,052		$	43,157		$	70,895			$	173,337		$	66,334		$	107,003
	(1) Included in Interest income on investment securities and other in our Consolidated Statement of Income.
	(2) Included in Interest expense on borrowings in our Consolidated Statement of Income.
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	The following table presents the activity in our accumulated other comprehensive income for the periods indicated:
		Net unrealized gains on securities available for sale			Net unrealized (losses) gains on			Unrealized (losses)			Pension and postretirement plans			Total
					securities transferred from			gains on interest rate
					available for sale to			swaps designated as
					held to maturity			cash flow hedges
	Balance, January 1, 2013	$	206,733		$	(1,691	)	$	(6,262	)	$	(41,477	)	$	157,303
	Period change, net of tax	(130,047		)	24,156			530			143			(105,218		)
	Balance, September 30, 2013	$	76,686		$	22,465		$	(5,732	)	$	(41,334	)	$	52,085
	Balance, January 1, 2012	$	105,276		$	2,652		$	(13,003	)	$	(27,113	)	$	67,812
	Period change, net of tax	99,071			(3,760		)	6,536			5,156			107,003
	Balance, September 30, 2012	$	204,347		$	(1,108	)	$	(6,467	)	$	(21,957	)	$	174,815

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair value option quantitative disclosures	'
		September 30,			December 31,
		2013			2012
	Fair value carrying amount	$	80,468		$	154,745
	Aggregate unpaid principal balance	77,427			149,412
	Fair value carrying amount less aggregate unpaid principal balance	$	3,041		$	5,333
Summary of assets and liabilities measured at fair value on a recurring basis	'
		Fair Value Measurements
		Total			Level 1			Level 2			Level 3
	31-Dec-12
	Assets:
	Investment securities available for sale:
	Debt securities:
	States and political subdivisions	$	608,061		$	—		$	608,061		$	—
	U.S. Treasury	20,707			20,707			—			—
	U.S. government agencies	4,651			—			4,651			—
	U.S. government sponsored enterprises	403,892			—			403,892			—
	Corporate	837,027			—			837,027			—
	Trust preferred securities	14,195			—			—			14,195
	Total debt securities	1,888,533			20,707			1,853,631			14,195
	Mortgage-backed securities:
	Residential mortgage-backed securities:
	Government National Mortgage Association	69,626			—			69,626			—
	Federal National Mortgage Association	414,462			—			414,462			—
	Federal Home Loan Mortgage Corporation	354,893			—			354,893			—
	Collateralized mortgage obligations:
	Government National Mortgage Association	1,091,157			—			1,091,157			—
	Federal National Mortgage Association	1,474,428			—			1,474,428			—
	Federal Home Loan Mortgage Corporation	1,047,217			—			1,047,217			—
	Non-agency issued	61,123			—			61,123			—
	Total collateralized mortgage obligations	3,673,925			—			3,673,925			—
	Total residential mortgage-backed securities	4,512,906			—			4,512,906			—
	Commercial mortgage-backed securities, non-agency issued	2,060,221			—			2,060,221			—
	Total mortgage-backed securities	6,573,127			—			6,573,127			—
	Collateralized loan obligations, non-agency issued	1,544,865			—			—			1,544,865
	Asset-backed securities collateralized by:
	Student loans	389,741			—			389,741			—
	Credit cards	75,075			—			75,075			—
	Auto loans	372,166			—			372,166			—
	Other	118,659			—			118,659			—
	Total asset-backed securities	955,641			—			955,641			—
	Other	31,439			23,311			8,128			—
	Total securities available for sale	10,993,605			44,018			9,390,527			1,559,060
	Loans held for sale (1)	154,745			—			154,745			—
	Derivatives	102,069			—			102,069			—
	Total assets	$	11,250,419		$	44,018		$	9,647,341		$	1,559,060
	Liabilities:
	Derivatives	$	104,697		$	—		$	104,697		$	—
	(1)	Represents loans for which we have elected the fair value option
	The following tables summarize our assets and liabilities measured at fair value on a recurring basis at the dates indicated:
		Fair Value Measurements
		Total			Level 1			Level 2			Level 3
	30-Sep-13
	Assets:
	Investment securities available for sale:
	Debt securities:
	States and political subdivisions	$	544,544		$	—		$	544,544		$	—
	U.S. Treasury	20,511			20,511			—			—
	U.S. government agencies	4,174			—			4,174			—
	U.S. government sponsored enterprises	325,387			—			325,387			—
	Corporate	864,888			—			864,888			—
	Trust preferred securities	5,340			—			—			5,340
	Total debt securities	1,764,844			20,511			1,738,993			5,340
	Mortgage-backed securities:
	Residential mortgage-backed securities:
	Government National Mortgage Association	42,448			—			42,448			—
	Federal National Mortgage Association	150,262			—			150,262			—
	Federal Home Loan Mortgage Corporation	171,616			—			171,616			—
	Collateralized mortgage obligations:
	Federal National Mortgage Association	794,804			—			794,804			—
Federal Home Loan Mortgage Corporation	393,683			—			393,683			—
Non-agency issued	16,233			—			16,233			—
Total collateralized mortgage obligations	1,204,720			—			1,204,720			—
Total residential mortgage-backed securities	1,569,046			—			1,569,046			—
Commercial mortgage-backed securities, non-agency issued	1,863,116			—			1,863,116			—
Total mortgage-backed securities	3,432,162			—			3,432,162			—
Collateralized loan obligations, non-agency issued	1,466,125			—			—			1,466,125
Asset-backed securities collateralized by:
Student loans	317,513			—			317,513			—
Credit cards	73,023			—			73,023			—
Auto loans	336,552			—			336,552			—
Other	187,156			—			187,156			—
Total asset-backed securities	914,244			—			914,244			—
Other	32,301			22,476			9,825			—
Total securities available for sale	7,609,676			42,987			6,095,224			1,471,465
Loans held for sale (1)	80,468			—			80,468			—
Derivatives	49,259			—			49,259			—
Total assets	$	7,739,403		$	42,987		$	6,224,951		$	1,471,465
Liabilities:
Derivatives	$	49,949		$	—		$	49,949		$	—
(1)	Represents loans for which we have elected the fair value option
Summary of assets and liabilities measured at fair value on a nonrecurring basis	'
	The following table summarizes our assets and liabilities measured at fair value on a nonrecurring basis for the periods indicated:
		Fair Value Measurements												Total gains
		Total			Level 1			Level 2			Level 3			(losses)
	Nine months ended September 30, 2013
	Collateral dependent impaired loans	$	23,694		$	—		$	13,708		$	9,986		$	(423	)
	Nine months ended September 30, 2012
	Collateral dependent impaired loans	$	35,651		$	—		$	20,490		$	15,161		$	(2,889	)
Changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis	'
	The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis were as follows for the periods indicated:
		Nine months ended September 30,
		2013										2012
		Trust			Collateralized			Total				Trust			Collateralized		Total
		preferred			loan obligations							preferred			loan obligations
		securities										securities
	Balance at beginning of period	$	14,195		$	1,544,865		$	1,559,060			$	25,032		$	—	$	25,032
	Transfers from level 2(1)	—			—			—				—			157,999		157,999
	Purchases	—			73,392			73,392				—			1,081,678		1,081,678
	Settlements	(8,854		)	(159,295		)	(168,149		)		(12,199		)	—		(12,199		)
	Gains included in other comprehensive income	703			7,204			7,907				2,923			30,904		33,827
	Losses included in earnings	(704		)	(41		)	(745		)		(446		)	—		(446		)
	Balance at end of period	$	5,340		$1,466,125			$	1,471,465			$	15,310		$	1,270,581	$	1,285,891
Fair value measurements, valuation techniques and significant unobservable inputs	'
	The table below provides a summary of our level 3 fair value measurements, valuation techniques, and the significant unobservable inputs at the date indicated:
		Fair			Valuation	Unobservable	Range (weighted average)
		Value			technique	input
	31-Dec-12
	Collateralized loan obligations	$	1,544,865		Internally modeled	Market spreads	150 - 550 bps (213 bps)
Carrying value and estimated fair value of financial instruments	'
	The carrying value and estimated fair value of our financial instruments, including those that are not measured and reported at fair value on a recurring basis or nonrecurring basis, at the dates indicated are as follows:
		30-Sep-13										31-Dec-12
		Carrying value			Estimated fair			Fair value				Carrying value			Estimated fair		Fair value
					value			level							value		level
	Financial assets:
	Cash and cash equivalents	$	558,086		$	558,086		1				$	430,862		$	430,862	1
	Investment securities available for sale	7,609,676			7,609,676			1,2,3		(1)		10,993,605			10,993,605		1,2,3		(1)
	Investment securities held to maturity	3,841,700			3,839,863			2				1,299,806			1,373,971		2
	Federal Home Loan Bank and Federal Reserve Bank common stock	437,534			437,534			2				420,277			420,277		2
	Loans held for sale	80,468			80,468			2				154,745			154,745		2
	Loans and leases, net	20,891,118			21,307,115			2,3		(2)		19,547,490			20,213,465		2,3		(2)
	Derivatives	49,259			49,259			2				102,069			102,069		2
	Accrued interest receivable	108,345			108,345			2				107,757			107,757		2
	Financial liabilities:
	Deposits	$	26,969,002		27,121,761			2				$	27,676,531		$	27,852,175	2
	Borrowings	4,901,963			4,860,013			2				3,716,143			3,773,787		2
	Derivatives	49,949			49,949			2				104,697			104,697		2
	Accrued interest payable	10,925			10,925			2				9,695			9,695		2
	(1)	For a detailed breakout of our investment securities available for sale, refer to our table of recurring fair value measurements.
	(2)	Loans and leases classified as level 2 are made up of $14 million and $31 million of collateral dependent impaired loans without significant adjustments made to appraised values at September 30, 2013 and December 31, 2012, respectively. All other loans and leases are classified as level 3.

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Financial information of business segments	'
	Selected financial information for our segments follows for the periods indicated:
		Banking		Financial			Consolidated
				services			total
	Three months ended September 30, 2013
	Net interest income	$	277,540	$	—		$	277,540
	Provision for credit losses	27,600		—			27,600
	Net interest income after provision for credit losses	249,940		—			249,940
	Noninterest income	73,511		17,911			91,422
	Amortization of intangibles	6,856		846			7,702
	Other noninterest expense	210,256		13,235			223,491
	Income before income taxes	106,339		3,830			110,169
	Income tax expense	29,549		1,477			31,026
	Net income	$	76,790	$	2,353		$	79,143
	Three months ended September 30, 2012
	Net interest income	$	269,610	$	(5	)	$	269,605
	Provision for credit losses	22,200		—			22,200
	Net interest income after provision for credit losses	247,410		(5		)	247,405
	Noninterest income	83,472		18,731			102,203
	Amortization of core deposit and other intangibles	13,468		1,038			14,506
	Other noninterest expense	239,007		13,029			252,036
	Income before income taxes	78,407		4,659			83,066
	Income tax expense	22,895		1,787			24,682
	Net income	$	55,512	$	2,872		$	58,384
	Nine months ended September 30, 2013
	Net interest income	$	813,113	$	—		$	813,113
	Provision for credit losses	73,000		—			73,000
	Net interest income after provision for credit losses	740,113		—			740,113
	Noninterest income	224,309		51,971			276,280
	Amortization of intangibles	30,058		2,613			32,671
	Other noninterest expense	632,268		39,090			671,358
	Income before income taxes	302,096		10,268			312,364
	Income tax expense	90,855		3,947			94,802
	Net income	$	211,241	$	6,321		$	217,562
	Nine months ended September 30, 2012
	Net interest income	$	771,012	$	(23	)	$	770,989
	Provision for credit losses	70,300		—			70,300
	Net interest income after provision for credit losses	700,712		(23		)	700,689
	Noninterest income	215,305		52,404			267,709
	Amortization of core deposit and other intangibles	27,551		3,260			30,811
	Other noninterest expense	743,072		38,476			781,548
	Income before income taxes	145,394		10,645			156,039
	Income tax expense	44,631		4,083			48,714
	Net income	$	100,763	$	6,562		$	107,325

Acquisitions_Assets_Acquired_D

Acquisitions - Assets Acquired (Details) (HSBC Bank Branches [Member], USD $)	18-May-12
In Thousands, unless otherwise specified
HSBC Bank Branches [Member]	'
Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value:	'
Cash and cash equivalents	$7,360,218	[1]
Loans	1,599,712
Core deposit and other intangibles	84,631
Other assets	72,323
Total assets acquired	9,116,884
Deposits	-9,854,589	[2]
Other liabilities	-32,792
Total liabilities assumed	-9,887,381
Goodwill	$770,497
[1]	Amount is net of $772 million deposit premium paid to HSBC.
[2]	Deposits reported exclude $0.5 billion in municipal deposits that were subject to a price concession.

Acquisitions_Acquired_Loans_De

Acquisitions - Acquired Loans (Details) (HSBC Bank Branches [Member], USD $)	18-May-12
In Thousands, unless otherwise specified
HSBC Bank Branches [Member]	'
Information about the acquired HSBC loan portfolio	'
Contractually required principal and interest at acquisition	$758,449
Contractual cash flows not expected to be collected (nonaccretable discount)	-16,497
Expected cash flows at acquisition	741,952
Interest component of expected cash flows (accretable discount)	-90,670
Fair value of acquired loans (excluding lines of credit)	$651,282

Acquisitions_Details_Textual

Acquisitions (Details Textual) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

0 Months Ended

1 Months Ended

0 Months Ended

1 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Mar. 31, 2013

18-May-12

Dec. 31, 2012

18-May-12

Dec. 31, 2012

18-May-12

Dec. 31, 2012

18-May-12

Jul. 13, 2012

Jan. 31, 2012

Jul. 20, 2012

Sep. 07, 2012

Aug. 17, 2012

Jun. 22, 2012

Jun. 30, 2012

Jan. 31, 2012

Jan. 31, 2012

HSBC Bank Branches [Member]

HSBC Bank Branches [Member]

HSBC Bank Branches [Member]

HSBC Bank Branches [Member]

HSBC Bank Branches [Member]

HSBC Bank Branches [Member]

HSBC Bank Branches [Member]

KeyBank [Member]

KeyBank [Member]

Community Bank [Member]

Community Bank [Member]

Five Star [Member]

Five Star [Member]

Five Star [Member]

Community Bank and Five Star [Member]

Community Bank and Five Star [Member]

Branch

Core Deposits [Member]

Core Deposits [Member]

Wealth Management [Member]

Wealth Management [Member]

Purchased Credit Card [Member]

Purchased Credit Card [Member]

HSBC Bank Branches [Member]

HSBC Bank Branches [Member]

HSBC Bank Branches [Member]

FNFG Bank Branches [Member]

HSBC Bank Branches [Member]

FNFG Bank Branches [Member]

FNFG Bank Branches [Member]

HSBC Bank Branches [Member]

FNFG Bank Branches [Member]

Branch

Branch

Branch

Branch

Branch

Branch

Branch

Branch

Schedule of Business Acquisitions by Acquisition (Textual) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Branch locations acquired

'

'

'

'

'

'

137

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Premium received by company for purchase assignments

'

'

'

'

'

'

$122,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount of deposit premium for acquisition

'

'

'

'

'

'

772,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assets acquired under wealth management relationship

'

'

'

'

'

'

2,500,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquired deposits subject to price concession

'

'

'

'

500,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Branches to be transferred to purchaser

'

'

'

'

'

'

'

'

'

'

'

'

'

'

26

16

3

4

'

'

'

'

Number of branches for which purchase right to be assigned

'

'

'

'

'

'

'

'

'

'

'

'

'

'

26

'

'

'

4

'

20

7

Additional branches transferred to purchaser

'

'

'

'

'

'

'

'

'

'

'

'

'

'

11

'

'

'

'

'

'

'

Number of branches for which direct cost relates

'

'

'

'

'

'

'

'

'

'

'

'

'

37

'

'

'

'

'

'

'

'

Loans acquired by purchaser

'

'

'

'

'

'

'

'

'

'

'

'

'

256,500,000

'

107,000,000

55,400,000

18,000,000

58,600,000

'

'

'

Deposits acquired by purchaser

'

'

'

'

'

'

'

'

'

'

'

'

'

2,000,000,000

'

696,600,000

100,800,000

157,200,000

129,300,000

'

'

'

Deposit Premium Received on Sale of Branches

'

'

'

'

'

'

'

'

'

'

'

'

'

91,500,000

'

23,800,000

3,100,000

6,500,000

'

5,300,000

'

'

Core deposit intangible asset recognized

'

'

'

'

'

'

'

'

41,000,000

'

9,000,000

'

34,000,000

'

'

'

'

'

'

'

'

'

Estimated useful life intangible asset amortized

'

'

'

'

'

'

'

'3 years

'

'10 years

'

'10 years

'

'

'

'

'

'

'

'

'

'

Reduction to goodwill

'

'

'

'

'

36,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Merger and acquisition integration expenses

$0

$29,404,000

$0

$173,834,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investment_Securities_Availabl

Investment Securities - Available for Sale and Held to Maturity Securities (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	$7,485,106	$10,658,220
Securities available for sale, unrealized gains	184,347	343,864
Securities available for sale, unrealized losses	-59,777	-8,479
Securities available for sale, fair value	7,609,676	10,993,605
Securities held to maturity, amortized cost	3,841,700	1,299,806
Securities held to maturity, unrealized gains	55,424	74,284
Securities held to maturity, unrealized losses	-57,261	-119
Securities held to maturity, fair value	3,839,863	1,373,971
Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Securities held to maturity, amortized cost	3,583,251	1,281,842
Securities held to maturity, unrealized gains	54,819	73,450
Securities held to maturity, unrealized losses	-54,030	-91
Securities held to maturity, fair value	3,584,040	1,355,201
Government National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Securities held to maturity, amortized cost	18,333	5,988
Securities held to maturity, unrealized gains	222	340
Securities held to maturity, unrealized losses	-106	-28
Securities held to maturity, fair value	18,449	6,300
Government National Mortgage Association [Member] | Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Securities held to maturity, amortized cost	1,459,691	1,006,238
Securities held to maturity, unrealized gains	34,950	48,748
Securities held to maturity, unrealized losses	-1,433	-91
Securities held to maturity, fair value	1,493,208	1,054,895
Federal National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Securities held to maturity, amortized cost	154,141	5,223
Securities held to maturity, unrealized gains	180	168
Securities held to maturity, unrealized losses	-2,545	0
Securities held to maturity, fair value	151,776	5,391
Federal National Mortgage Association [Member] | Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Securities held to maturity, amortized cost	1,105,058	18,463
Securities held to maturity, unrealized gains	1,116	657
Securities held to maturity, unrealized losses	-31,712	0
Securities held to maturity, fair value	1,074,462	19,120
Federal Home Loan Mortgage Corporation [Member] | Residential mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Securities held to maturity, amortized cost	85,975	6,753
Securities held to maturity, unrealized gains	203	326
Securities held to maturity, unrealized losses	-580	0
Securities held to maturity, fair value	85,598	7,079
Federal Home Loan Mortgage Corporation [Member] | Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Securities held to maturity, amortized cost	1,018,502	257,141
Securities held to maturity, unrealized gains	18,753	24,045
Securities held to maturity, unrealized losses	-20,885	0
Securities held to maturity, fair value	1,016,370	281,186
Debt securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	1,746,303	1,829,732
Securities available for sale, unrealized gains	36,905	63,360
Securities available for sale, unrealized losses	-18,364	-4,559
Securities available for sale, fair value	1,764,844	1,888,533
Debt securities [Member] | States and political subdivisions [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	531,258	587,482
Securities available for sale, unrealized gains	13,606	20,723
Securities available for sale, unrealized losses	-320	-144
Securities available for sale, fair value	544,544	608,061
Debt securities [Member] | U.S. Treasury [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	19,956	19,944
Securities available for sale, unrealized gains	555	763
Securities available for sale, unrealized losses	0	0
Securities available for sale, fair value	20,511	20,707
Debt securities [Member] | U.S. government agencies debt securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	4,181	4,641
Securities available for sale, unrealized gains	7	13
Securities available for sale, unrealized losses	-14	-3
Securities available for sale, fair value	4,174	4,651
Debt securities [Member] | U.S. government sponsored enterprises [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	317,836	390,421
Securities available for sale, unrealized gains	8,229	13,471
Securities available for sale, unrealized losses	-678	0
Securities available for sale, fair value	325,387	403,892
Debt securities [Member] | Corporate [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	867,106	811,720
Securities available for sale, unrealized gains	14,508	28,390
Securities available for sale, unrealized losses	-16,726	-3,083
Securities available for sale, fair value	864,888	837,027
Debt securities [Member] | Trust preferred securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	5,966	15,524
Securities available for sale, unrealized gains	0	0
Securities available for sale, unrealized losses	-626	-1,329
Securities available for sale, fair value	5,340	14,195
Mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	3,376,854	6,351,334
Securities available for sale, unrealized gains	92,503	224,571
Securities available for sale, unrealized losses	-37,195	-2,778
Securities available for sale, fair value	3,432,162	6,573,127
Residential mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	1,592,193	4,421,607
Securities available for sale, unrealized gains	12,181	92,786
Securities available for sale, unrealized losses	-35,328	-1,487
Securities available for sale, fair value	1,569,046	4,512,906
Residential mortgage-backed securities [Member] | Government National Mortgage Association [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	43,352	67,700
Securities available for sale, unrealized gains	777	2,123
Securities available for sale, unrealized losses	-1,681	-197
Securities available for sale, fair value	42,448	69,626
Residential mortgage-backed securities [Member] | Federal National Mortgage Association [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	145,427	394,274
Securities available for sale, unrealized gains	4,845	20,218
Securities available for sale, unrealized losses	-10	-30
Securities available for sale, fair value	150,262	414,462
Residential mortgage-backed securities [Member] | Federal Home Loan Mortgage Corporation [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	167,114	342,906
Securities available for sale, unrealized gains	4,502	11,987
Securities available for sale, unrealized losses	0	0
Securities available for sale, fair value	171,616	354,893
Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	1,236,300	3,616,727
Securities available for sale, unrealized gains	2,057	58,458
Securities available for sale, unrealized losses	-33,637	-1,260
Securities available for sale, fair value	1,204,720	3,673,925
Collateralized mortgage obligations [Member] | Non-agency issued [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	15,513	59,604
Securities available for sale, unrealized gains	728	1,544
Securities available for sale, unrealized losses	-8	-25
Securities available for sale, fair value	16,233	61,123
Collateralized mortgage obligations [Member] | Government National Mortgage Association [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	'	1,060,415
Securities available for sale, unrealized gains	'	30,742
Securities available for sale, unrealized losses	'	0
Securities available for sale, fair value	'	1,091,157
Collateralized mortgage obligations [Member] | Federal National Mortgage Association [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	817,057	1,460,400
Securities available for sale, unrealized gains	552	14,968
Securities available for sale, unrealized losses	-22,805	-940
Securities available for sale, fair value	794,804	1,474,428
Collateralized mortgage obligations [Member] | Federal Home Loan Mortgage Corporation [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	403,730	1,036,308
Securities available for sale, unrealized gains	777	11,204
Securities available for sale, unrealized losses	-10,824	-295
Securities available for sale, fair value	393,683	1,047,217
Commercial mortgage-backed securities, non-agency issued [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	1,784,661	1,929,727
Securities available for sale, unrealized gains	80,322	131,785
Securities available for sale, unrealized losses	-1,867	-1,291
Securities available for sale, fair value	1,863,116	2,060,221
Collateralized loan obligations, non-agency issued [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	1,424,309	1,510,253
Securities available for sale, unrealized gains	43,410	35,466
Securities available for sale, unrealized losses	-1,594	-854
Securities available for sale, fair value	1,466,125	1,544,865
Asset-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	905,137	936,077
Securities available for sale, unrealized gains	11,472	19,760
Securities available for sale, unrealized losses	-2,365	-196
Securities available for sale, fair value	914,244	955,641
Asset-backed securities [Member] | Student Loans [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	311,532	377,923
Securities available for sale, unrealized gains	6,363	11,952
Securities available for sale, unrealized losses	-382	-134
Securities available for sale, fair value	317,513	389,741
Asset-backed securities [Member] | Credit cards [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	73,051	73,768
Securities available for sale, unrealized gains	380	1,319
Securities available for sale, unrealized losses	-408	-12
Securities available for sale, fair value	73,023	75,075
Asset-backed securities [Member] | Auto Loans [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	333,248	366,501
Securities available for sale, unrealized gains	3,812	5,708
Securities available for sale, unrealized losses	-508	-43
Securities available for sale, fair value	336,552	372,166
Asset-backed securities [Member] | Other [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	187,306	117,885
Securities available for sale, unrealized gains	917	781
Securities available for sale, unrealized losses	-1,067	-7
Securities available for sale, fair value	187,156	118,659
Other debt and equity securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Amortized cost for securities available for sale	32,503	30,824
Securities available for sale, unrealized gains	57	707
Securities available for sale, unrealized losses	-259	-92
Securities available for sale, fair value	$32,301	$31,439

Investment_Securities_Availabl1

Investment Securities - Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Security	Security
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	$2,086,465	$740,530
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-57,791	-5,311
Available for sale securities in unrealized loss position less than 12 months, count	444	143
Fair value of available for sale securities in unrealized loss position 12 months or longer	49,135	133,502
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	-1,986	-3,168
Available for sale securities in unrealized loss positions 12 months or longer, count	20	27
Total fair value available for sale securities	2,135,600	874,032
Total unrealized losses, available for sale securities	-59,777	-8,479
Available for sale securities in unrealized loss positions, count	464	170
Fair value of held to maturity securities in unrealized loss position less than 12 months	1,846,178	25,444
Unrealized losses of held to maturity securities in unrealized loss position less than 12 months	-57,261	-119
Held to maturity securities in unrealized loss position less than 12 months, count	166	3
Fair value of held to maturity securities in unrealized loss position 12 months or longer	0	0
Unrealized losses of held to maturity securities in unrealized loss position 12 months or longer	0	0
Held to maturity securities in unrealized loss positions longer than 12 months, count	0	0
Total fair value of held to maturity securities	1,846,178	25,444
Total unrealized losses of held to maturity securities	-57,261	-119
Held to maturity securities in unrealized loss positions, count	166	3
Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of held to maturity securities in unrealized loss position less than 12 months	1,627,442	'
Unrealized losses of held to maturity securities in unrealized loss position less than 12 months	-54,030	'
Held to maturity securities in unrealized loss position less than 12 months, count	105	'
Fair value of held to maturity securities in unrealized loss position 12 months or longer	0	'
Unrealized losses of held to maturity securities in unrealized loss position 12 months or longer	0	'
Held to maturity securities in unrealized loss positions longer than 12 months, count	0	'
Total fair value of held to maturity securities	1,627,442	'
Total unrealized losses of held to maturity securities	-54,030	'
Held to maturity securities in unrealized loss positions, count	105	'
Government National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of held to maturity securities in unrealized loss position less than 12 months	11,287	1,959
Unrealized losses of held to maturity securities in unrealized loss position less than 12 months	-106	-28
Held to maturity securities in unrealized loss position less than 12 months, count	4	1
Fair value of held to maturity securities in unrealized loss position 12 months or longer	0	0
Unrealized losses of held to maturity securities in unrealized loss position 12 months or longer	0	0
Held to maturity securities in unrealized loss positions longer than 12 months, count	0	0
Total fair value of held to maturity securities	11,287	1,959
Total unrealized losses of held to maturity securities	-106	-28
Held to maturity securities in unrealized loss positions, count	4	1
Government National Mortgage Association [Member] | Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of held to maturity securities in unrealized loss position less than 12 months	104,281	23,485
Unrealized losses of held to maturity securities in unrealized loss position less than 12 months	-1,433	-91
Held to maturity securities in unrealized loss position less than 12 months, count	14	2
Fair value of held to maturity securities in unrealized loss position 12 months or longer	0	0
Unrealized losses of held to maturity securities in unrealized loss position 12 months or longer	0	0
Held to maturity securities in unrealized loss positions longer than 12 months, count	0	0
Total fair value of held to maturity securities	104,281	23,485
Total unrealized losses of held to maturity securities	-1,433	-91
Held to maturity securities in unrealized loss positions, count	14	2
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] | Residential mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of held to maturity securities in unrealized loss position less than 12 months	138,981	'
Unrealized losses of held to maturity securities in unrealized loss position less than 12 months	-2,545	'
Held to maturity securities in unrealized loss position less than 12 months, count	39	'
Fair value of held to maturity securities in unrealized loss position 12 months or longer	0	'
Unrealized losses of held to maturity securities in unrealized loss position 12 months or longer	0	'
Held to maturity securities in unrealized loss positions longer than 12 months, count	0	'
Total fair value of held to maturity securities	138,981	'
Total unrealized losses of held to maturity securities	-2,545	'
Held to maturity securities in unrealized loss positions, count	39	'
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] | Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of held to maturity securities in unrealized loss position less than 12 months	913,806	'
Unrealized losses of held to maturity securities in unrealized loss position less than 12 months	-31,712	'
Held to maturity securities in unrealized loss position less than 12 months, count	50	'
Fair value of held to maturity securities in unrealized loss position 12 months or longer	0	'
Unrealized losses of held to maturity securities in unrealized loss position 12 months or longer	0	'
Held to maturity securities in unrealized loss positions longer than 12 months, count	0	'
Total fair value of held to maturity securities	913,806	'
Total unrealized losses of held to maturity securities	-31,712	'
Held to maturity securities in unrealized loss positions, count	50	'
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] | Residential mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of held to maturity securities in unrealized loss position less than 12 months	68,468	'
Unrealized losses of held to maturity securities in unrealized loss position less than 12 months	-580	'
Held to maturity securities in unrealized loss position less than 12 months, count	18	'
Fair value of held to maturity securities in unrealized loss position 12 months or longer	0	'
Unrealized losses of held to maturity securities in unrealized loss position 12 months or longer	0	'
Held to maturity securities in unrealized loss positions longer than 12 months, count	0	'
Total fair value of held to maturity securities	68,468	'
Total unrealized losses of held to maturity securities	-580	'
Held to maturity securities in unrealized loss positions, count	18	'
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] | Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of held to maturity securities in unrealized loss position less than 12 months	609,355	'
Unrealized losses of held to maturity securities in unrealized loss position less than 12 months	-20,885	'
Held to maturity securities in unrealized loss position less than 12 months, count	41	'
Fair value of held to maturity securities in unrealized loss position 12 months or longer	0	'
Unrealized losses of held to maturity securities in unrealized loss position 12 months or longer	0	'
Held to maturity securities in unrealized loss positions longer than 12 months, count	0	'
Total fair value of held to maturity securities	609,355	'
Total unrealized losses of held to maturity securities	-20,885	'
Held to maturity securities in unrealized loss positions, count	41	'
Debt securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	451,181	114,568
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-16,394	-2,279
Available for sale securities in unrealized loss position less than 12 months, count	294	70
Fair value of available for sale securities in unrealized loss position 12 months or longer	47,180	63,823
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	-1,970	-2,280
Available for sale securities in unrealized loss positions 12 months or longer, count	18	15
Total fair value available for sale securities	498,361	178,391
Total unrealized losses, available for sale securities	-18,364	-4,559
Available for sale securities in unrealized loss positions, count	312	85
Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	1,058,402	350,310
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-33,637	-1,235
Available for sale securities in unrealized loss position less than 12 months, count	59	18
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	4,123
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	-25
Available for sale securities in unrealized loss positions 12 months or longer, count	0	1
Total fair value available for sale securities	1,058,402	354,433
Total unrealized losses, available for sale securities	-33,637	-1,260
Available for sale securities in unrealized loss positions, count	59	19
Residential mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	1,078,757	374,158
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-35,328	-1,454
Available for sale securities in unrealized loss position less than 12 months, count	72	31
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	4,438
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	-33
Available for sale securities in unrealized loss positions 12 months or longer, count	0	3
Total fair value available for sale securities	1,078,757	378,596
Total unrealized losses, available for sale securities	-35,328	-1,487
Available for sale securities in unrealized loss positions, count	72	34
Commercial mortgage-backed securities, non-agency issued [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	144,576	29,660
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-1,852	-613
Available for sale securities in unrealized loss position less than 12 months, count	18	5
Fair value of available for sale securities in unrealized loss position 12 months or longer	1,868	31,567
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	-15	-678
Available for sale securities in unrealized loss positions 12 months or longer, count	1	4
Total fair value available for sale securities	146,444	61,227
Total unrealized losses, available for sale securities	-1,867	-1,291
Available for sale securities in unrealized loss positions, count	19	9
Mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	1,223,333	403,818
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-37,180	-2,067
Available for sale securities in unrealized loss position less than 12 months, count	90	36
Fair value of available for sale securities in unrealized loss position 12 months or longer	1,868	36,005
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	-15	-711
Available for sale securities in unrealized loss positions 12 months or longer, count	1	7
Total fair value available for sale securities	1,225,201	439,823
Total unrealized losses, available for sale securities	-37,195	-2,778
Available for sale securities in unrealized loss positions, count	91	43
Collateralized loan obligations, non-agency issued [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	177,557	167,997
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-1,594	-854
Available for sale securities in unrealized loss position less than 12 months, count	21	25
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	0
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	0
Available for sale securities in unrealized loss positions 12 months or longer, count	0	0
Total fair value available for sale securities	177,557	167,997
Total unrealized losses, available for sale securities	-1,594	-854
Available for sale securities in unrealized loss positions, count	21	25
Asset-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	212,213	54,147
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-2,364	-111
Available for sale securities in unrealized loss position less than 12 months, count	34	12
Fair value of available for sale securities in unrealized loss position 12 months or longer	87	25,738
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	-1	-85
Available for sale securities in unrealized loss positions 12 months or longer, count	1	2
Total fair value available for sale securities	212,300	79,885
Total unrealized losses, available for sale securities	-2,365	-196
Available for sale securities in unrealized loss positions, count	35	14
Other securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	22,181	0
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-259	0
Available for sale securities in unrealized loss position less than 12 months, count	5	0
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	7,936
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	-92
Available for sale securities in unrealized loss positions 12 months or longer, count	0	3
Total fair value available for sale securities	22,181	7,936
Total unrealized losses, available for sale securities	-259	-92
Available for sale securities in unrealized loss positions, count	5	3
Student Loans [Member] | Asset-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	65,470	2,055
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-382	-53
Available for sale securities in unrealized loss position less than 12 months, count	9	1
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	25,641
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	-81
Available for sale securities in unrealized loss positions 12 months or longer, count	0	1
Total fair value available for sale securities	65,470	27,696
Total unrealized losses, available for sale securities	-382	-134
Available for sale securities in unrealized loss positions, count	9	2
Credit cards [Member] | Asset-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	36,079	5,987
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-408	-12
Available for sale securities in unrealized loss position less than 12 months, count	4	2
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	0
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	0
Available for sale securities in unrealized loss positions 12 months or longer, count	0	0
Total fair value available for sale securities	36,079	5,987
Total unrealized losses, available for sale securities	-408	-12
Available for sale securities in unrealized loss positions, count	4	2
Auto Loans [Member] | Asset-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	37,187	41,605
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-508	-43
Available for sale securities in unrealized loss position less than 12 months, count	9	7
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	0
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	0
Available for sale securities in unrealized loss positions 12 months or longer, count	0	0
Total fair value available for sale securities	37,187	41,605
Total unrealized losses, available for sale securities	-508	-43
Available for sale securities in unrealized loss positions, count	9	7
Other [Member] | Asset-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	73,477	4,500
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-1,066	-3
Available for sale securities in unrealized loss position less than 12 months, count	12	2
Fair value of available for sale securities in unrealized loss position 12 months or longer	87	97
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	-1	-4
Available for sale securities in unrealized loss positions 12 months or longer, count	1	1
Total fair value available for sale securities	73,564	4,597
Total unrealized losses, available for sale securities	-1,067	-7
Available for sale securities in unrealized loss positions, count	13	3
States and political subdivisions [Member] | Debt securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	27,131	21,373
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-313	-98
Available for sale securities in unrealized loss position less than 12 months, count	46	42
Fair value of available for sale securities in unrealized loss position 12 months or longer	274	4,311
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	-7	-46
Available for sale securities in unrealized loss positions 12 months or longer, count	1	5
Total fair value available for sale securities	27,405	25,684
Total unrealized losses, available for sale securities	-320	-144
Available for sale securities in unrealized loss positions, count	47	47
US government agencies debt securities [Member] | Debt securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	0	0
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	0	0
Available for sale securities in unrealized loss position less than 12 months, count	0	0
Fair value of available for sale securities in unrealized loss position 12 months or longer	2,136	2,237
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	-14	-3
Available for sale securities in unrealized loss positions 12 months or longer, count	3	2
Total fair value available for sale securities	2,136	2,237
Total unrealized losses, available for sale securities	-14	-3
Available for sale securities in unrealized loss positions, count	3	2
US Government-sponsored Enterprises Debt Securities [Member] | Debt securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	69,974	'
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-678	'
Available for sale securities in unrealized loss position less than 12 months, count	6	'
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	'
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	'
Available for sale securities in unrealized loss positions 12 months or longer, count	0	'
Total fair value available for sale securities	69,974	'
Total unrealized losses, available for sale securities	-678	'
Available for sale securities in unrealized loss positions, count	6	'
Corporate [Member] | Debt securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	354,076	92,190
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-15,403	-2,168
Available for sale securities in unrealized loss position less than 12 months, count	242	27
Fair value of available for sale securities in unrealized loss position 12 months or longer	39,430	44,085
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	-1,323	-915
Available for sale securities in unrealized loss positions 12 months or longer, count	11	2
Total fair value available for sale securities	393,506	136,275
Total unrealized losses, available for sale securities	-16,726	-3,083
Available for sale securities in unrealized loss positions, count	253	29
Trust preferred securities [Member] | Debt securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	0	1,005
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	0	-13
Available for sale securities in unrealized loss position less than 12 months, count	0	1
Fair value of available for sale securities in unrealized loss position 12 months or longer	5,340	13,190
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	-626	-1,316
Available for sale securities in unrealized loss positions 12 months or longer, count	3	6
Total fair value available for sale securities	5,340	14,195
Total unrealized losses, available for sale securities	-626	-1,329
Available for sale securities in unrealized loss positions, count	3	7
Government National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	19,648	22,604
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-1,681	-197
Available for sale securities in unrealized loss position less than 12 months, count	6	6
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	0
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	0
Available for sale securities in unrealized loss positions 12 months or longer, count	0	0
Total fair value available for sale securities	19,648	22,604
Total unrealized losses, available for sale securities	-1,681	-197
Available for sale securities in unrealized loss positions, count	6	6
Federal National Mortgage Association [Member] | Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	683,277	232,290
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-22,805	-940
Available for sale securities in unrealized loss position less than 12 months, count	37	12
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	0
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	0
Available for sale securities in unrealized loss positions 12 months or longer, count	0	0
Total fair value available for sale securities	683,277	232,290
Total unrealized losses, available for sale securities	-22,805	-940
Available for sale securities in unrealized loss positions, count	37	12
Federal National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	707	1,244
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-10	-22
Available for sale securities in unrealized loss position less than 12 months, count	7	7
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	315
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	-8
Available for sale securities in unrealized loss positions 12 months or longer, count	0	2
Total fair value available for sale securities	707	1,559
Total unrealized losses, available for sale securities	-10	-30
Available for sale securities in unrealized loss positions, count	7	9
Federal Home Loan Mortgage Corporation [Member] | Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	373,987	118,020
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-10,824	-295
Available for sale securities in unrealized loss position less than 12 months, count	18	6
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	0
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	0
Available for sale securities in unrealized loss positions 12 months or longer, count	0	0
Total fair value available for sale securities	373,987	118,020
Total unrealized losses, available for sale securities	-10,824	-295
Available for sale securities in unrealized loss positions, count	18	6
Non-agency issued [Member] | Collateralized mortgage obligations [Member]	'	'
Schedule of available for sale securities [Line Items]	'	'
Fair value of available for sale securities in unrealized loss position less than 12 months	1,138	0
Unrealized losses of available for sale securities in unrealized loss position less than 12 months	-8	0
Available for sale securities in unrealized loss position less than 12 months, count	4	0
Fair value of available for sale securities in unrealized loss position 12 months or longer	0	4,123
Unrealized losses of available for sale securities in unrealized loss position 12 months or longer	0	-25
Available for sale securities in unrealized loss positions 12 months or longer, count	0	1
Total fair value available for sale securities	1,138	4,123
Total unrealized losses, available for sale securities	($8)	($25)
Available for sale securities in unrealized loss positions, count	4	1

Investment_Securities_Maturiti

Investment Securities - Maturities of Available for Sale and Held to Maturity Debt Securities (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Scheduled contractual maturies of investment securities [Line Items]	'	'
Debt securities, amortized cost within one year	$224,911	'
Debt securities, fair value within one year	227,171	'
Debt securities, amortized cost after one year through five years	899,393	'
Debt securities, fair value after one year through five years	925,249	'
Debt securities, amortized cost after five years through ten years	601,962	'
Debt securities, fair value after five years through ten years	593,531	'
Debt securities, amortized cost after ten years	20,037	'
Debt securities, fair value after ten years	18,893	'
Debt securities, amortized cost	1,746,303	'
Debt securities, fair value	1,764,844	'
Mortgage-backed securities, amortized cost	7,218,554	'
Mortgage-backed securities, fair value	7,272,025	'
Available for sale securities, amortized cost	7,485,106	10,658,220
Investment securities available for sale	7,609,676	10,993,605
Total available for sale and held to maturity securities, amortized cost	11,326,806	'
Total available for sale and held to maturity securities, fair value	11,449,539	'
Collateralized loan obligations, non-agency issued [Member]	'	'
Scheduled contractual maturies of investment securities [Line Items]	'	'
Available for sale securities, amortized cost	1,424,309	1,510,253
Investment securities available for sale	1,466,125	1,544,865
Asset-backed securities [Member]	'	'
Scheduled contractual maturies of investment securities [Line Items]	'	'
Available for sale securities, amortized cost	905,137	936,077
Investment securities available for sale	914,244	955,641
Other debt and equity securities [Member]	'	'
Scheduled contractual maturies of investment securities [Line Items]	'	'
Available for sale securities, amortized cost	32,503	30,824
Investment securities available for sale	$32,301	$31,439

Investment_Securities_Investme

Investment Securities Investment Securities - Available for Sale Securities Transferred to Held to Maturity Securities (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Schedule of available for sale securities [Line Items]	'	'	'
Available for sale securities transferred to held to maturity, amortized cost	'	$2,946,458	'
Available for sale securities transferred to held to maturity, unrealized gains	'	59,355	'
Available for sale securities transferred to held to maturity, unrealized loss	'	-4,483	'
Securities transferred from available for sale to held to maturity, fair value	3,001,330	3,001,330	0
Collateralized Mortgage Obligations [Member]	'	'	'
Schedule of available for sale securities [Line Items]	'	'	'
Available for sale securities transferred to held to maturity, amortized cost	'	2,662,179	'
Available for sale securities transferred to held to maturity, unrealized gains	'	41,667	'
Available for sale securities transferred to held to maturity, unrealized loss	'	-4,468	'
Securities transferred from available for sale to held to maturity, fair value	'	2,699,378	'
Government National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'	'	'
Schedule of available for sale securities [Line Items]	'	'	'
Available for sale securities transferred to held to maturity, amortized cost	'	14,615	'
Available for sale securities transferred to held to maturity, unrealized gains	'	748	'
Available for sale securities transferred to held to maturity, unrealized loss	'	0	'
Securities transferred from available for sale to held to maturity, fair value	'	15,363	'
Government National Mortgage Association [Member] | Collateralized Mortgage Obligations [Member]	'	'	'
Schedule of available for sale securities [Line Items]	'	'	'
Available for sale securities transferred to held to maturity, amortized cost	'	884,677	'
Available for sale securities transferred to held to maturity, unrealized gains	'	25,759	'
Available for sale securities transferred to held to maturity, unrealized loss	'	0	'
Securities transferred from available for sale to held to maturity, fair value	'	910,436	'
Federal National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'	'	'
Schedule of available for sale securities [Line Items]	'	'	'
Available for sale securities transferred to held to maturity, amortized cost	'	173,196	'
Available for sale securities transferred to held to maturity, unrealized gains	'	11,716	'
Available for sale securities transferred to held to maturity, unrealized loss	'	-15	'
Securities transferred from available for sale to held to maturity, fair value	'	184,897	'
Federal National Mortgage Association [Member] | Collateralized Mortgage Obligations [Member]	'	'	'
Schedule of available for sale securities [Line Items]	'	'	'
Available for sale securities transferred to held to maturity, amortized cost	'	1,019,254	'
Available for sale securities transferred to held to maturity, unrealized gains	'	9,244	'
Available for sale securities transferred to held to maturity, unrealized loss	'	-2,703	'
Securities transferred from available for sale to held to maturity, fair value	'	1,025,795	'
Federal Home Loan Mortgage Corporation [Member] | Residential mortgage-backed securities [Member]	'	'	'
Schedule of available for sale securities [Line Items]	'	'	'
Available for sale securities transferred to held to maturity, amortized cost	'	96,468	'
Available for sale securities transferred to held to maturity, unrealized gains	'	5,224	'
Available for sale securities transferred to held to maturity, unrealized loss	'	0	'
Securities transferred from available for sale to held to maturity, fair value	'	101,692	'
Federal Home Loan Mortgage Corporation [Member] | Collateralized Mortgage Obligations [Member]	'	'	'
Schedule of available for sale securities [Line Items]	'	'	'
Available for sale securities transferred to held to maturity, amortized cost	'	758,248	'
Available for sale securities transferred to held to maturity, unrealized gains	'	6,664	'
Available for sale securities transferred to held to maturity, unrealized loss	'	-1,765	'
Securities transferred from available for sale to held to maturity, fair value	'	$763,147	'

Investment_Securities_Details_

Investment Securities (Details Textual) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Mar. 31, 2013	Sep. 30, 2012
Investment Securities (Additional Textual) [Abstract]	'	'	'	'
Contractual maturity period of securities (in years)	'10 years	'	'	'
Weighted average duration investment securities portfolio (in years)	'3 years 2 months 0 days	'2 years 5 months 0 days	'	'
Securities transferred from available for sale to held to maturity (at fair value)	$3,001,330	'	$3,001,330	$0

Loans_and_Leases_Composition_D

Loans and Leases - Composition (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
In Thousands, unless otherwise specified
Summary of loans and leases	'	'	'
Loans receivable	$21,089,071	$19,710,012	'
Allowance for loan losses	-197,953	-162,522	'
Total loans and leases, net	20,891,118	19,547,490	'
Total commercial [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	12,902,079	12,046,516	'
Total commercial [Member] | Commercial real estate [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	6,887,827	6,466,047	'
Total commercial [Member] | Construction [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	809,580	627,146	'
Total commercial [Member] | Business [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	5,204,672	4,953,323	'
Total consumer [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	8,186,992	7,663,496	'
Total consumer [Member] | Residential real estate [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	3,519,233	3,761,567	'
Total consumer [Member] | Home equity [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	2,706,603	2,651,891	'
Total consumer [Member] | Indirect auto [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	1,339,449	601,456	'
Total consumer [Member] | Credit cards [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	311,600	314,973	'
Total consumer [Member] | Other consumer [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	310,107	333,609	'
Originated loans [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	16,211,505	13,372,357	12,232,568
Allowance for loan losses	-194,992	-160,958	'
Total loans and leases, net	16,016,513	13,211,399	'
Originated loans [Member] | Total commercial [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	10,834,663	9,330,036	'
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	5,321,251	4,491,440	'
Originated loans [Member] | Total commercial [Member] | Construction [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	772,362	552,265	'
Originated loans [Member] | Total commercial [Member] | Business [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	4,741,050	4,286,331	3,881,145
Originated loans [Member] | Total consumer [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	5,376,842	4,042,321	'
Originated loans [Member] | Total consumer [Member] | Residential real estate [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	1,882,628	1,724,134	1,701,787
Originated loans [Member] | Total consumer [Member] | Home equity [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	1,536,935	1,286,243	1,231,556
Originated loans [Member] | Total consumer [Member] | Indirect auto [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	1,339,449	601,456	'
Originated loans [Member] | Total consumer [Member] | Credit cards [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	311,600	215,001	'
Originated loans [Member] | Total consumer [Member] | Other consumer [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	306,230	215,487	'
Acquired loans [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	4,877,566	6,337,655	6,873,958
Allowance for loan losses	-2,961	-1,564	'
Total loans and leases, net	4,874,605	6,336,091	'
Acquired loans [Member] | Total commercial [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	2,067,416	2,716,480	'
Acquired loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	1,566,576	1,974,607	'
Acquired loans [Member] | Total commercial [Member] | Construction [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	37,218	74,881	'
Acquired loans [Member] | Total commercial [Member] | Business [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	463,622	666,992	801,009
Acquired loans [Member] | Total consumer [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	2,810,150	3,621,175	'
Acquired loans [Member] | Total consumer [Member] | Residential real estate [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	1,636,605	2,037,433	2,168,969
Acquired loans [Member] | Total consumer [Member] | Home equity [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	1,169,668	1,365,648	1,429,873
Acquired loans [Member] | Total consumer [Member] | Indirect auto [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	0	0	'
Acquired loans [Member] | Total consumer [Member] | Credit cards [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	0	99,972	'
Acquired loans [Member] | Total consumer [Member] | Other consumer [Member]	'	'	'
Summary of loans and leases	'	'	'
Loans receivable	$3,877	$118,122	'

Loans_and_Leases_Acquired_Loan

Loans and Leases - Acquired Loans (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
The outstanding principal balance and the related carrying amount of the acquired loans	'	'
Outstanding principal balance	$5,004,902	$6,500,976
Carrying amount	4,877,566	6,337,655
Credit impaired acquired loans evaluated individually for future credit losses [Member]	'	'
The outstanding principal balance and the related carrying amount of the acquired loans	'	'
Outstanding principal balance	20,286	31,032
Carrying amount	13,800	24,157
Acquired loans evaluated collectively for future credit losses [Member]	'	'
The outstanding principal balance and the related carrying amount of the acquired loans	'	'
Outstanding principal balance	3,602,822	4,773,965
Carrying amount	3,533,103	4,690,143
Other acquired loans [Member]	'	'
The outstanding principal balance and the related carrying amount of the acquired loans	'	'
Outstanding principal balance	1,381,794	1,695,979
Carrying amount	$1,330,663	$1,623,355

Loans_and_Leases_Accretable_Yi

Loans and Leases - Accretable Yield Rollforward(Details) (USD $)	9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Changes in the accretable discount on loans acquired	'		'
Beginning balance	($1,057,132)		($1,186,900)
HSBC acquisition	'		-90,670
Net reclassifications from nonaccretable yield	-14,362		-28,095
Accretion	156,497		248,533
Other changes in nonaccretable yield	21,722	[1]	'
Ending balance	($893,275)		($1,057,132)
[1]	Includes changes in expected cash flows from changes in interest rate and prepayment assumptions.

Loans_and_Leases_Allowance_for

Loans and Leases - Allowance for Loan Loss Rollforward (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Total	$21,089,071	'	$21,089,071	'	$19,710,012
Total commercial [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Total	12,902,079	'	12,902,079	'	12,046,516
Total commercial [Member] | Business [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Total	5,204,672	'	5,204,672	'	4,953,323
Total consumer [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Total	8,186,992	'	8,186,992	'	7,663,496
Total consumer [Member] | Residential real estate [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Total	3,519,233	'	3,519,233	'	3,761,567
Total consumer [Member] | Home equity [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Total	2,706,603	'	2,706,603	'	2,651,891
Originated loans [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	182,450	135,196	160,958	118,192	'
Provision for loan losses	25,432	21,393	68,261	62,295	'
Charge-offs	-17,830	-10,142	-42,918	-37,157	'
Recoveries	4,940	1,074	8,691	4,386	'
Allowance related to loans sold	'	-312	'	-507	'
Balance at end of period	194,992	147,209	194,992	147,209	'
Individually evaluated for impairment	9,922	9,891	9,922	9,891	'
Collectively evaluated for impairment	185,070	137,318	185,070	137,318	'
Total	194,992	147,209	194,992	147,209	'
Loans receivables, individually evaluated for impairment	169,967	134,660	169,967	134,660	'
Loans receivables, collectively evaluated for impairment	16,041,538	12,097,908	16,041,538	12,097,908	'
Total	16,211,505	12,232,568	16,211,505	12,232,568	13,372,357
Originated loans [Member] | Total commercial [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Total	10,834,663	'	10,834,663	'	9,330,036
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	43,258	44,927	37,550	50,007	'
Provision for loan losses	-3,327	-6,536	5,637	-8,021	'
Charge-offs	-2,312	-1,508	-6,103	-5,518	'
Recoveries	3,316	123	3,851	556	'
Allowance related to loans sold	'	-70	'	-88	'
Balance at end of period	40,935	36,936	40,935	36,936	'
Individually evaluated for impairment	1,744	2,047	1,744	2,047	'
Collectively evaluated for impairment	39,191	34,889	39,191	34,889	'
Total	40,935	36,936	40,935	36,936	'
Loans receivables, individually evaluated for impairment	81,934	62,708	81,934	62,708	'
Loans receivables, collectively evaluated for impairment	6,011,679	4,644,029	6,011,679	4,644,029	'
Total	6,093,613	4,706,737	6,093,613	4,706,737	5,043,705
Originated loans [Member] | Total commercial [Member] | Business [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	106,597	75,708	99,188	57,348	'
Provision for loan losses	22,411	23,147	41,897	56,634	'
Charge-offs	-10,163	-6,500	-23,477	-23,131	'
Recoveries	469	424	1,706	1,954	'
Allowance related to loans sold	'	-161	'	-187	'
Balance at end of period	119,314	92,618	119,314	92,618	'
Individually evaluated for impairment	4,587	5,090	4,587	5,090	'
Collectively evaluated for impairment	114,727	87,528	114,727	87,528	'
Total	119,314	92,618	119,314	92,618	'
Loans receivables, individually evaluated for impairment	57,916	47,947	57,916	47,947	'
Loans receivables, collectively evaluated for impairment	4,683,134	3,833,198	4,683,134	3,833,198	'
Total	4,741,050	3,881,145	4,741,050	3,881,145	4,286,331
Originated loans [Member] | Total consumer [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Total	5,376,842	'	5,376,842	'	4,042,321
Originated loans [Member] | Total consumer [Member] | Residential real estate [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	2,630	5,076	4,515	4,101	'
Provision for loan losses	-385	107	-1,552	2,409	'
Charge-offs	-161	-410	-1,256	-1,965	'
Recoveries	24	14	401	294	'
Allowance related to loans sold	'	-14	'	-66	'
Balance at end of period	2,108	4,773	2,108	4,773	'
Individually evaluated for impairment	1,084	2,373	1,084	2,373	'
Collectively evaluated for impairment	1,024	2,400	1,024	2,400	'
Total	2,108	4,773	2,108	4,773	'
Loans receivables, individually evaluated for impairment	20,483	17,756	20,483	17,756	'
Loans receivables, collectively evaluated for impairment	1,862,145	1,684,031	1,862,145	1,684,031	'
Total	1,882,628	1,701,787	1,882,628	1,701,787	1,724,134
Originated loans [Member] | Total consumer [Member] | Home equity [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	5,505	4,971	4,716	4,374	'
Provision for loan losses	674	-771	2,981	2,604	'
Charge-offs	-395	-545	-2,072	-3,508	'
Recoveries	73	145	232	411	'
Allowance related to loans sold	'	-40	'	-121	'
Balance at end of period	5,857	3,760	5,857	3,760	'
Individually evaluated for impairment	2,439	360	2,439	360	'
Collectively evaluated for impairment	3,418	3,400	3,418	3,400	'
Total	5,857	3,760	5,857	3,760	'
Loans receivables, individually evaluated for impairment	6,007	4,738	6,007	4,738	'
Loans receivables, collectively evaluated for impairment	1,530,928	1,226,818	1,530,928	1,226,818	'
Total	1,536,935	1,231,556	1,536,935	1,231,556	1,286,243
Originated loans [Member] | Total consumer [Member] | Other consumer [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	24,460	4,514	14,989	2,362	'
Provision for loan losses	6,059	5,446	19,298	8,669	'
Charge-offs	-4,799	-1,179	-10,010	-3,035	'
Recoveries	1,058	368	2,501	1,171	'
Allowance related to loans sold	'	-27	'	-45	'
Balance at end of period	26,778	9,122	26,778	9,122	'
Individually evaluated for impairment	68	21	68	21	'
Collectively evaluated for impairment	26,710	9,101	26,710	9,101	'
Total	26,778	9,122	26,778	9,122	'
Loans receivables, individually evaluated for impairment	3,627	1,511	3,627	1,511	'
Loans receivables, collectively evaluated for impairment	1,953,652	709,832	1,953,652	709,832	'
Total	1,957,279	711,343	1,957,279	711,343	1,031,944
Acquired loans [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	1,258	3,320	1,564	1,908	'
Provision for loan losses	1,768	407	3,539	7,208	'
Charge-offs	-106	-1,126	-2,319	-6,826	'
Recoveries	41	123	177	434	'
Balance at end of period	2,961	2,724	2,961	2,724	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	2,961	2,724	2,961	2,724	'
Total	2,961	2,724	2,961	2,724	'
Loans receivables, individually evaluated for impairment	13,753	11,695	13,753	11,695	'
Loans receivables, collectively evaluated for impairment	1,317,909	1,859,122	1,317,909	1,859,122	'
Loans acquired with deteriorated credit quality	3,545,904	5,003,141	3,545,904	5,003,141	'
Total	4,877,566	6,873,958	4,877,566	6,873,958	6,337,655
Acquired loans [Member] | Total commercial [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Total	2,067,416	'	2,067,416	'	2,716,480
Acquired loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	42	0	0	0	'
Provision for loan losses	0	407	1,724	5,208	'
Charge-offs	0	-468	-1,772	-5,467	'
Recoveries	10	61	100	259	'
Balance at end of period	52	0	52	0	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	52	0	52	0	'
Total	52	0	52	0	'
Loans receivables, individually evaluated for impairment	999	1,356	999	1,356	'
Loans receivables, collectively evaluated for impairment	0	0	0	0	'
Loans acquired with deteriorated credit quality	1,602,795	2,127,878	1,602,795	2,127,878	'
Total	1,603,794	2,129,234	1,603,794	2,129,234	2,049,488
Acquired loans [Member] | Total commercial [Member] | Business [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	0	0	0	0	'
Provision for loan losses	0	0	0	0	'
Charge-offs	0	0	0	0	'
Recoveries	0	0	0	0	'
Balance at end of period	0	0	0	0	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	0	0	0	0	'
Total	0	0	0	0	'
Loans receivables, individually evaluated for impairment	9,430	7,998	9,430	7,998	'
Loans receivables, collectively evaluated for impairment	338,788	534,204	338,788	534,204	'
Loans acquired with deteriorated credit quality	115,404	258,807	115,404	258,807	'
Total	463,622	801,009	463,622	801,009	666,992
Acquired loans [Member] | Total consumer [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Total	2,810,150	'	2,810,150	'	3,621,175
Acquired loans [Member] | Total consumer [Member] | Residential real estate [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	60	60	60	60	'
Provision for loan losses	859	0	859	0	'
Charge-offs	0	0	0	0	'
Recoveries	0	0	0	0	'
Balance at end of period	919	60	919	60	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	919	60	919	60	'
Total	919	60	919	60	'
Loans receivables, individually evaluated for impairment	0	0	0	0	'
Loans receivables, collectively evaluated for impairment	0	0	0	0	'
Loans acquired with deteriorated credit quality	1,636,605	2,168,969	1,636,605	2,168,969	'
Total	1,636,605	2,168,969	1,636,605	2,168,969	2,037,433
Acquired loans [Member] | Total consumer [Member] | Home equity [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	290	50	290	50	'
Provision for loan losses	1,700	0	1,700	0	'
Charge-offs	0	0	0	0	'
Recoveries	0	0	0	0	'
Balance at end of period	1,990	50	1,990	50	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	1,990	50	1,990	50	'
Total	1,990	50	1,990	50	'
Loans receivables, individually evaluated for impairment	3,324	2,341	3,324	2,341	'
Loans receivables, collectively evaluated for impairment	975,244	1,072,200	975,244	1,072,200	'
Loans acquired with deteriorated credit quality	191,100	355,332	191,100	355,332	'
Total	1,169,668	1,429,873	1,169,668	1,429,873	1,365,648
Acquired loans [Member] | Total consumer [Member] | Other consumer [Member]	'	'	'	'	'
Activity in the allowance for credit losses for the periods indicated	'	'	'	'	'
Balance at beginning of period	866	3,210	1,214	1,798	'
Provision for loan losses	-791	0	-744	2,000	'
Charge-offs	-106	-658	-547	-1,359	'
Recoveries	31	62	77	175	'
Balance at end of period	0	2,614	0	2,614	'
Individually evaluated for impairment	0	0	0	0	'
Collectively evaluated for impairment	0	2,614	0	2,614	'
Total	0	2,614	0	2,614	'
Loans receivables, individually evaluated for impairment	0	0	0	0	'
Loans receivables, collectively evaluated for impairment	3,877	252,718	3,877	252,718	'
Loans acquired with deteriorated credit quality	0	92,155	0	92,155	'
Total	$3,877	$344,873	$3,877	$344,873	$218,094

Loans_and_Leases_Nonperforming

Loans and Leases - Nonperforming Loans (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Summary of nonaccruing loans	'	'
Nonaccruing loans	$175,232	$172,724
Total commercial [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	99,326	107,966
Total commercial [Member] | Commercial real estate [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	52,300	51,968
Total commercial [Member] | Business [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	47,026	55,998
Total consumer [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	75,906	64,758
Total consumer [Member] | Residential real estate [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	31,312	27,192
Total consumer [Member] | Home equity [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	33,610	33,438
Total consumer [Member] | Other consumer [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	10,984	4,128
Originated loans [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	144,844	143,076
Originated loans [Member] | Total commercial [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	87,156	97,914
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	51,302	50,848
Originated loans [Member] | Total commercial [Member] | Business [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	35,854	47,066
Originated loans [Member] | Total consumer [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	57,688	45,162
Originated loans [Member] | Total consumer [Member] | Residential real estate [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	31,312	27,192
Originated loans [Member] | Total consumer [Member] | Home equity [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	15,709	14,233
Originated loans [Member] | Total consumer [Member] | Other consumer [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	10,667	3,737
Acquired loans [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	30,388	29,648
Acquired loans [Member] | Total commercial [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	12,170	10,052
Acquired loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	998	1,120
Acquired loans [Member] | Total commercial [Member] | Business [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	11,172	8,932
Acquired loans [Member] | Total consumer [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	18,218	19,596
Acquired loans [Member] | Total consumer [Member] | Residential real estate [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	0	0
Acquired loans [Member] | Total consumer [Member] | Home equity [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	17,901	19,205
Acquired loans [Member] | Total consumer [Member] | Other consumer [Member]	'	'
Summary of nonaccruing loans	'	'
Nonaccruing loans	$317	$391

Loans_and_Leases_Interest_Inco

Loans and Leases - Interest Income Foregone (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Details of additional information on loans	'	'	'	'
Additional interest income that would have been recorded if nonaccrual were performing in accordance with original terms	$1,860	$2,157	$5,398	$5,287

Loans_and_Leases_Impaired_Loan

Loans and Leases - Impaired Loans (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Summary of impaired loans	'	'	'	'	'
Recorded investment	$183,720	'	$183,720	'	$161,684
Total commercial [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	150,279	'	150,279	'	132,509
Total consumer [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	33,441	'	33,441	'	29,175
Originated loans [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	169,967	'	169,967	'	151,536
Unpaid principal balance	236,053	'	236,053	'	209,079
Related allowance	9,922	'	9,922	'	11,280
Average recorded investment	177,898	130,654	180,790	134,014	'
Interest income recognized	927	1,070	2,334	2,154	'
Originated loans [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	128,229	'	128,229	'	87,437
Unpaid principal balance	178,206	'	178,206	'	124,171
Related allowance	0	'	0	'	0
Originated loans [Member] | With a related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	41,738	'	41,738	'	64,099
Unpaid principal balance	57,847	'	57,847	'	84,908
Related allowance	9,922	'	9,922	'	11,280
Originated loans [Member] | Total commercial [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	139,850	'	139,850	'	124,723
Unpaid principal balance	200,495	'	200,495	'	180,676
Related allowance	6,331	'	6,331	'	7,395
Average recorded investment	147,980	106,528	147,437	116,798	'
Interest income recognized	703	863	1,902	1,709	'
Originated loans [Member] | Total commercial [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	109,710	'	109,710	'	76,300
Unpaid principal balance	155,926	'	155,926	'	112,368
Related allowance	0	'	0	'	0
Originated loans [Member] | Total commercial [Member] | With a related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	30,140	'	30,140	'	48,423
Unpaid principal balance	44,569	'	44,569	'	68,308
Related allowance	6,331	'	6,331	'	7,395
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	81,934	'	81,934	'	66,514
Unpaid principal balance	108,992	'	108,992	'	91,963
Related allowance	1,744	'	1,744	'	2,640
Average recorded investment	87,903	63,721	88,046	67,480	'
Interest income recognized	410	548	1,213	1,112	'
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	62,495	'	62,495	'	41,964
Unpaid principal balance	84,613	'	84,613	'	54,926
Related allowance	0	'	0	'	0
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member] | With a related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	19,439	'	19,439	'	24,550
Unpaid principal balance	24,379	'	24,379	'	37,037
Related allowance	1,744	'	1,744	'	2,640
Originated loans [Member] | Total commercial [Member] | Business [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	57,916	'	57,916	'	58,209
Unpaid principal balance	91,503	'	91,503	'	88,713
Related allowance	4,587	'	4,587	'	4,755
Average recorded investment	60,077	42,807	59,391	49,318	'
Interest income recognized	293	315	689	597	'
Originated loans [Member] | Total commercial [Member] | Business [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	47,215	'	47,215	'	34,336
Unpaid principal balance	71,313	'	71,313	'	57,442
Related allowance	0	'	0	'	0
Originated loans [Member] | Total commercial [Member] | Business [Member] | With a related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	10,701	'	10,701	'	23,873
Unpaid principal balance	20,190	'	20,190	'	31,271
Related allowance	4,587	'	4,587	'	4,755
Originated loans [Member] | Total consumer [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	30,117	'	30,117	'	26,813
Unpaid principal balance	35,558	'	35,558	'	28,403
Related allowance	3,591	'	3,591	'	3,885
Average recorded investment	29,918	24,126	33,353	17,216	'
Interest income recognized	224	207	432	445	'
Originated loans [Member] | Total consumer [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	18,519	'	18,519	'	11,137
Unpaid principal balance	22,280	'	22,280	'	11,803
Related allowance	0	'	0	'	0
Originated loans [Member] | Total consumer [Member] | With a related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	11,598	'	11,598	'	15,676
Unpaid principal balance	13,278	'	13,278	'	16,600
Related allowance	3,591	'	3,591	'	3,885
Originated loans [Member] | Total consumer [Member] | Residential real estate [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	20,483	'	20,483	'	19,506
Unpaid principal balance	24,413	'	24,413	'	20,391
Related allowance	1,084	'	1,084	'	3,074
Average recorded investment	20,755	17,789	23,421	14,102	'
Interest income recognized	182	134	352	340	'
Originated loans [Member] | Total consumer [Member] | Residential real estate [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	15,573	'	15,573	'	6,315
Unpaid principal balance	18,762	'	18,762	'	6,473
Related allowance	0	'	0	'	0
Originated loans [Member] | Total consumer [Member] | Residential real estate [Member] | With a related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	4,910	'	4,910	'	13,191
Unpaid principal balance	5,651	'	5,651	'	13,918
Related allowance	1,084	'	1,084	'	3,074
Originated loans [Member] | Total consumer [Member] | Home equity [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	6,007	'	6,007	'	5,398
Unpaid principal balance	6,992	'	6,992	'	5,989
Related allowance	2,439	'	2,439	'	801
Average recorded investment	6,091	4,825	6,096	2,558	'
Interest income recognized	18	43	47	74	'
Originated loans [Member] | Total consumer [Member] | Home equity [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	1,102	'	1,102	'	2,992
Unpaid principal balance	1,328	'	1,328	'	3,406
Related allowance	0	'	0	'	0
Originated loans [Member] | Total consumer [Member] | Home equity [Member] | With a related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	4,905	'	4,905	'	2,406
Unpaid principal balance	5,664	'	5,664	'	2,583
Related allowance	2,439	'	2,439	'	801
Originated loans [Member] | Total consumer [Member] | Other consumer [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	3,627	'	3,627	'	1,909
Unpaid principal balance	4,153	'	4,153	'	2,023
Related allowance	68	'	68	'	10
Average recorded investment	3,072	1,512	3,836	556	'
Interest income recognized	24	30	33	31	'
Originated loans [Member] | Total consumer [Member] | Other consumer [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	1,844	'	1,844	'	1,830
Unpaid principal balance	2,190	'	2,190	'	1,924
Related allowance	0	'	0	'	0
Originated loans [Member] | Total consumer [Member] | Other consumer [Member] | With a related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	1,783	'	1,783	'	79
Unpaid principal balance	1,963	'	1,963	'	99
Related allowance	68	'	68	'	10
Acquired loans [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Average recorded investment	12,350	8,442	14,007	10,760	'
Interest income recognized	1	26	3	26	'
Acquired loans [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	13,753	'	13,753	'	10,148
Unpaid principal balance	19,153	'	19,153	'	15,575
Related allowance	0	'	0	'	0
Acquired loans [Member] | Total commercial [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Average recorded investment	9,085	6,101	10,671	9,980	'
Interest income recognized	0	0	0	0	'
Acquired loans [Member] | Total commercial [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	10,429	'	10,429	'	7,786
Unpaid principal balance	14,740	'	14,740	'	12,088
Related allowance	0	'	0	'	0
Acquired loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Average recorded investment	1,065	678	1,139	1,605	'
Interest income recognized	0	0	0	0	'
Acquired loans [Member] | Total commercial [Member] | Commercial real estate [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	999	'	999	'	1,130
Unpaid principal balance	4,447	'	4,447	'	4,652
Related allowance	0	'	0	'	0
Acquired loans [Member] | Total commercial [Member] | Business [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Average recorded investment	8,020	5,423	9,532	8,375	'
Interest income recognized	0	0	0	0	'
Acquired loans [Member] | Total commercial [Member] | Business [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	9,430	'	9,430	'	6,656
Unpaid principal balance	10,293	'	10,293	'	7,436
Related allowance	0	'	0	'	0
Acquired loans [Member] | Total consumer [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Average recorded investment	3,265	2,341	3,336	780	'
Interest income recognized	1	26	3	26	'
Acquired loans [Member] | Total consumer [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	3,324	'	3,324	'	2,362
Unpaid principal balance	4,413	'	4,413	'	3,487
Related allowance	0	'	0	'	0
Acquired loans [Member] | Total consumer [Member] | Residential real estate [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Average recorded investment	0	0	0	0	'
Interest income recognized	0	0	0	0	'
Acquired loans [Member] | Total consumer [Member] | Residential real estate [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	0	'	0	'	0
Unpaid principal balance	0	'	0	'	0
Related allowance	0	'	0	'	0
Acquired loans [Member] | Total consumer [Member] | Home equity [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Average recorded investment	3,265	2,341	3,336	780	'
Interest income recognized	1	26	3	26	'
Acquired loans [Member] | Total consumer [Member] | Home equity [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	3,324	'	3,324	'	2,345
Unpaid principal balance	4,413	'	4,413	'	3,470
Related allowance	0	'	0	'	0
Acquired loans [Member] | Total consumer [Member] | Other consumer [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Average recorded investment	0	0	0	0	'
Interest income recognized	0	0	0	0	'
Acquired loans [Member] | Total consumer [Member] | Other consumer [Member] | With no related allowance recorded [Member]	'	'	'	'	'
Summary of impaired loans	'	'	'	'	'
Recorded investment	0	'	0	'	17
Unpaid principal balance	0	'	0	'	17
Related allowance	$0	'	$0	'	$0

Loans_and_Leases_Reconciliatio

Loans and Leases - Reconciliation of Nonperforming Loans to Impaired Loans (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Reconciliation between nonaccrual loans and impaired loans [Line Items]	'	'
Nonaccrual loans	$175,232	$172,724
Plus: Accruing TDRs	69,877	46,280
Less : Smaller balance nonaccrual loans evaluated collectively when determining the allowance for loan losses	-61,389	-57,320
Total impaired loans	183,720	161,684
Total commercial [Member]	'	'
Reconciliation between nonaccrual loans and impaired loans [Line Items]	'	'
Nonaccrual loans	99,326	107,966
Plus: Accruing TDRs	61,893	36,380
Less : Smaller balance nonaccrual loans evaluated collectively when determining the allowance for loan losses	-10,940	-11,837
Total impaired loans	150,279	132,509
Total consumer [Member]	'	'
Reconciliation between nonaccrual loans and impaired loans [Line Items]	'	'
Nonaccrual loans	75,906	64,758
Plus: Accruing TDRs	7,984	9,900
Less : Smaller balance nonaccrual loans evaluated collectively when determining the allowance for loan losses	-50,449	-45,483
Total impaired loans	$33,441	$29,175

Loans_and_Leases_Past_Due_Agin

Loans and Leases - Past Due Aging Analysis (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
In Thousands, unless otherwise specified
Aging analysis of loans	'		'		'
Total	$21,089,071		$19,710,012		'
Greater than 90 days and accruing	0		0		'
Total commercial [Member]	'		'		'
Aging analysis of loans	'		'		'
Total	12,902,079		12,046,516		'
Total commercial [Member] | Business [Member]	'		'		'
Aging analysis of loans	'		'		'
Total	5,204,672		4,953,323		'
Total consumer [Member]	'		'		'
Aging analysis of loans	'		'		'
Total	8,186,992		7,663,496		'
Total consumer [Member] | Residential real estate [Member]	'		'		'
Aging analysis of loans	'		'		'
Total	3,519,233		3,761,567		'
Total consumer [Member] | Home equity [Member]	'		'		'
Aging analysis of loans	'		'		'
Total	2,706,603		2,651,891		'
Originated loans [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	35,521		26,302		'
60-89 days past due	13,454		12,588		'
Greater than 90 days past due	96,879		89,943		'
Total past due	145,854		128,833		'
Current	16,065,651		13,243,524		'
Total	16,211,505		13,372,357		12,232,568
Greater than 90 days and accruing	2,434	[1]	4,508	[1]	'
Originated loans [Member] | Total commercial [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	13,684		9,744		'
60-89 days past due	6,013		7,282		'
Greater than 90 days past due	57,097		59,691		'
Total past due	76,794		76,717		'
Current	10,757,869		9,253,319		'
Total	10,834,663		9,330,036		'
Greater than 90 days and accruing	27	[1]	4,106	[1]	'
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	5,590		4,346		'
60-89 days past due	878		2,584		'
Greater than 90 days past due	33,865		40,454		'
Total past due	40,333		47,384		'
Current	6,053,280		4,996,321		'
Total	6,093,613		5,043,705		4,706,737
Greater than 90 days and accruing	0	[1]	3,791	[1]	'
Originated loans [Member] | Total commercial [Member] | Business [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	8,094		5,398		'
60-89 days past due	5,135		4,698		'
Greater than 90 days past due	23,232		19,237		'
Total past due	36,461		29,333		'
Current	4,704,589		4,256,998		'
Total	4,741,050		4,286,331		3,881,145
Greater than 90 days and accruing	27	[1]	315	[1]	'
Originated loans [Member] | Total consumer [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	21,837		16,558		'
60-89 days past due	7,441		5,306		'
Greater than 90 days past due	39,782		30,252		'
Total past due	69,060		52,116		'
Current	5,307,782		3,990,205		'
Total	5,376,842		4,042,321		'
Greater than 90 days and accruing	2,407	[1]	402	[1]	'
Originated loans [Member] | Total consumer [Member] | Residential real estate [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	6,597		7,590		'
60-89 days past due	1,732		2,414		'
Greater than 90 days past due	21,584		19,241		'
Total past due	29,913		29,245		'
Current	1,852,715		1,694,889		'
Total	1,882,628		1,724,134		1,701,787
Greater than 90 days and accruing	0	[1]	0	[1]	'
Originated loans [Member] | Total consumer [Member] | Home equity [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	3,413		2,754		'
60-89 days past due	1,688		1,662		'
Greater than 90 days past due	10,685		8,991		'
Total past due	15,786		13,407		'
Current	1,521,149		1,272,836		'
Total	1,536,935		1,286,243		1,231,556
Greater than 90 days and accruing	0	[1]	0	[1]	'
Originated loans [Member] | Total consumer [Member] | Other consumer [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	11,827		6,214		'
60-89 days past due	4,021		1,230		'
Greater than 90 days past due	7,513		2,020		'
Total past due	23,361		9,464		'
Current	1,933,918		1,022,480		'
Total	1,957,279		1,031,944		711,343
Greater than 90 days and accruing	2,407	[1]	402	[1]	'
Acquired loans [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	41,872		55,163		'
60-89 days past due	18,835		40,252		'
Greater than 90 days past due	153,676		188,908		'
Total past due	214,383		284,323		'
Current	4,663,183		6,053,332		'
Total	4,877,566		6,337,655		6,873,958
Greater than 90 days and accruing	133,814	[1]	167,060	[1]	'
Acquired loans [Member] | Total commercial [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	14,098		16,312		'
60-89 days past due	5,667		19,930		'
Greater than 90 days past due	68,867		93,238		'
Total past due	88,632		129,480		'
Current	1,978,784		2,587,000		'
Total	2,067,416		2,716,480		'
Greater than 90 days and accruing	62,396	[1]	85,218	[1]	'
Acquired loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	8,523		10,651		'
60-89 days past due	5,249		18,066		'
Greater than 90 days past due	58,229		80,374		'
Total past due	72,001		109,091		'
Current	1,531,793		1,940,397		'
Total	1,603,794		2,049,488		2,129,234
Greater than 90 days and accruing	57,231	[1]	79,255	[1]	'
Acquired loans [Member] | Total commercial [Member] | Business [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	5,575		5,661		'
60-89 days past due	418		1,864		'
Greater than 90 days past due	10,638		12,864		'
Total past due	16,631		20,389		'
Current	446,991		646,603		'
Total	463,622		666,992		801,009
Greater than 90 days and accruing	5,165	[1]	5,963	[1]	'
Acquired loans [Member] | Total consumer [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	27,774		38,851		'
60-89 days past due	13,168		20,322		'
Greater than 90 days past due	84,809		95,670		'
Total past due	125,751		154,843		'
Current	2,684,399		3,466,332		'
Total	2,810,150		3,621,175		'
Greater than 90 days and accruing	71,418	[1]	81,842	[1]	'
Acquired loans [Member] | Total consumer [Member] | Residential real estate [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	19,876		24,104		'
60-89 days past due	10,261		11,917		'
Greater than 90 days past due	65,985		69,106		'
Total past due	96,122		105,127		'
Current	1,540,483		1,932,306		'
Total	1,636,605		2,037,433		2,168,969
Greater than 90 days and accruing	65,985	[1]	69,106	[1]	'
Acquired loans [Member] | Total consumer [Member] | Home equity [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	7,459		10,241		'
60-89 days past due	2,761		5,437		'
Greater than 90 days past due	18,507		20,705		'
Total past due	28,727		36,383		'
Current	1,140,941		1,329,265		'
Total	1,169,668		1,365,648		1,429,873
Greater than 90 days and accruing	5,433	[1]	7,268	[1]	'
Acquired loans [Member] | Total consumer [Member] | Other consumer [Member]	'		'		'
Aging analysis of loans	'		'		'
30-59 days past due	439		4,506		'
60-89 days past due	146		2,968		'
Greater than 90 days past due	317		5,859		'
Total past due	902		13,333		'
Current	2,975		204,761		'
Total	3,877		218,094		344,873
Greater than 90 days and accruing	$0	[1]	$5,468	[1]	'
[1]	Includes credit card loans, loans that have matured and are in the process of collection, and acquired loans that were originally recorded at fair value upon acquisition. Acquired loans are considered to be accruing as we can reasonably estimate future cash flows on these acquired loans and we expect to fully collect the carrying value of these loans net of the allowance for acquired loan losses. Therefore, we are accreting the difference between the carrying value of these loans and their expected cash flows into interest income.

Loans_and_Leases_Commercial_Cr

Loans and Leases - Commercial Credit Quality Indicators (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
In Thousands, unless otherwise specified
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	$21,089,071		$19,710,012		'
Total commercial [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	12,902,079		12,046,516		'
Total commercial [Member] | Business [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	5,204,672		4,953,323		'
Originated loans [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	16,211,505		13,372,357		12,232,568
Originated loans [Member] | Total commercial [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	10,834,663		9,330,036		'
Percent of total	100.00%		100.00%		'
Originated loans [Member] | Total commercial [Member] | Criticized [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	574,135	[1]	515,026	[1]	'
Percent of total	5.30%	[1]	5.50%	[1]	'
Originated loans [Member] | Total commercial [Member] | Criticized [Member] | Accrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	486,979	[1]	417,112	[1]	'
Percent of total	4.50%	[1]	4.50%	[1]	'
Originated loans [Member] | Total commercial [Member] | Criticized [Member] | Nonaccrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	87,156	[1]	97,914	[1]	'
Percent of total	0.80%	[1]	1.00%	[1]	'
Originated loans [Member] | Total commercial [Member] | Pass [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	10,260,528		8,815,010		'
Percent of total	94.70%		94.50%		'
Originated loans [Member] | Total commercial [Member] | Business [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	4,741,050		4,286,331		3,881,145
Originated loans [Member] | Total commercial [Member] | Business [Member] | Criticized [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	259,266	[1]	216,921	[1]	'
Originated loans [Member] | Total commercial [Member] | Business [Member] | Criticized [Member] | Accrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	223,412	[1]	169,855	[1]	'
Originated loans [Member] | Total commercial [Member] | Business [Member] | Criticized [Member] | Nonaccrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	35,854	[1]	47,066	[1]	'
Originated loans [Member] | Total commercial [Member] | Business [Member] | Pass [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	4,481,784		4,069,410		'
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	6,093,613		5,043,705		4,706,737
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member] | Criticized [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	314,869	[1]	298,105	[1]	'
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member] | Criticized [Member] | Accrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	263,567	[1]	247,257	[1]	'
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member] | Criticized [Member] | Nonaccrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	51,302	[1]	50,848	[1]	'
Originated loans [Member] | Total commercial [Member] | Commercial real estate [Member] | Pass [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	5,778,744		4,745,600		'
Acquired loans [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	4,877,566		6,337,655		6,873,958
Acquired loans [Member] | Total commercial [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	2,067,416		2,716,480		'
Percent of total	100.00%		100.00%		'
Acquired loans [Member] | Total commercial [Member] | Criticized [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	253,932	[1]	340,643	[1]	'
Percent of total	12.30%	[1]	12.60%	[1]	'
Acquired loans [Member] | Total commercial [Member] | Criticized [Member] | Accrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	241,762	[1]	330,591	[1]	'
Percent of total	11.70%	[1]	12.20%	[1]	'
Acquired loans [Member] | Total commercial [Member] | Criticized [Member] | Nonaccrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	12,170	[1]	10,052	[1]	'
Percent of total	0.60%	[1]	0.40%	[1]	'
Acquired loans [Member] | Total commercial [Member] | Pass [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	1,813,484		2,375,837		'
Percent of total	87.70%		87.40%		'
Acquired loans [Member] | Total commercial [Member] | Business [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	463,622		666,992		801,009
Acquired loans [Member] | Total commercial [Member] | Business [Member] | Criticized [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	63,753	[1]	85,437	[1]	'
Acquired loans [Member] | Total commercial [Member] | Business [Member] | Criticized [Member] | Accrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	52,581	[1]	76,505	[1]	'
Acquired loans [Member] | Total commercial [Member] | Business [Member] | Criticized [Member] | Nonaccrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	11,172	[1]	8,932	[1]	'
Acquired loans [Member] | Total commercial [Member] | Business [Member] | Pass [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	399,869		581,555		'
Acquired loans [Member] | Total commercial [Member] | Commercial real estate [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	1,603,794		2,049,488		2,129,234
Acquired loans [Member] | Total commercial [Member] | Commercial real estate [Member] | Criticized [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	190,179	[1]	255,206	[1]	'
Acquired loans [Member] | Total commercial [Member] | Commercial real estate [Member] | Criticized [Member] | Accrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	189,181	[1]	254,086	[1]	'
Acquired loans [Member] | Total commercial [Member] | Commercial real estate [Member] | Criticized [Member] | Nonaccrual [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	998	[1]	1,120	[1]	'
Acquired loans [Member] | Total commercial [Member] | Commercial real estate [Member] | Pass [Member]	'		'		'
Information about the credit quality of our commercial loan portfolio	'		'		'
Loans receivable	$1,413,615		$1,794,282		'
[1]	Includes special mention, substandard, doubtful, and loss, which are consistent with regulatory definitions, and as described in Item 1, “Business,” under “Asset Quality Review” in our Annual Report on 10-K for the year ended December 31, 2012.

Loans_and_Leases_Consumer_Cred

Loans and Leases - Consumer Credit Quality Indicators - FICO Score(Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
In Thousands, unless otherwise specified
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	$21,089,071		$19,710,012		'
Originated loans [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	16,211,505		13,372,357		12,232,568
Acquired loans [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	4,877,566		6,337,655		6,873,958
Total consumer [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	8,186,992		7,663,496		'
Total consumer [Member] | Residential real estate [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	3,519,233		3,761,567		'
Total consumer [Member] | Home equity [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	2,706,603		2,651,891		'
Total consumer [Member] | Originated loans [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	5,376,842		4,042,321		'
Percent of total	100.00%		100.00%		'
Total consumer [Member] | Originated loans [Member] | Over 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	4,110,603		2,981,282		'
Percent of total	76.50%		73.70%		'
Total consumer [Member] | Originated loans [Member] | 660 - 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	666,737		548,212		'
Percent of total	12.40%		13.60%		'
Total consumer [Member] | Originated loans [Member] | 620 - 660 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	308,266		249,261		'
Percent of total	5.70%		6.20%		'
Total consumer [Member] | Originated loans [Member] | 580 - 620 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	130,974		112,602		'
Percent of total	2.40%		2.80%		'
Total consumer [Member] | Originated loans [Member] | Less Than 580 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	121,502		130,812		'
Percent of total	2.30%		3.20%		'
Total consumer [Member] | Originated loans [Member] | No Score [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	38,760	[1]	20,152	[1]	'
Percent of total	0.70%	[1]	0.50%	[1]	'
Total consumer [Member] | Originated loans [Member] | Residential real estate [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	1,882,628		1,724,134		1,701,787
Total consumer [Member] | Originated loans [Member] | Residential real estate [Member] | Over 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	1,607,573		1,381,565		'
Total consumer [Member] | Originated loans [Member] | Residential real estate [Member] | 660 - 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	136,743		167,046		'
Total consumer [Member] | Originated loans [Member] | Residential real estate [Member] | 620 - 660 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	56,261		67,520		'
Total consumer [Member] | Originated loans [Member] | Residential real estate [Member] | 580 - 620 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	33,621		38,570		'
Total consumer [Member] | Originated loans [Member] | Residential real estate [Member] | Less Than 580 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	38,037		57,794		'
Total consumer [Member] | Originated loans [Member] | Residential real estate [Member] | No Score [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	10,393	[1]	11,639	[1]	'
Total consumer [Member] | Originated loans [Member] | Home equity [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	1,536,935		1,286,243		1,231,556
Total consumer [Member] | Originated loans [Member] | Home equity [Member] | Over 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	1,266,686		1,009,913		'
Total consumer [Member] | Originated loans [Member] | Home equity [Member] | 660 - 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	150,454		148,692		'
Total consumer [Member] | Originated loans [Member] | Home equity [Member] | 620 - 660 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	61,125		59,085		'
Total consumer [Member] | Originated loans [Member] | Home equity [Member] | 580 - 620 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	26,741		28,487		'
Total consumer [Member] | Originated loans [Member] | Home equity [Member] | Less Than 580 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	28,327		36,152		'
Total consumer [Member] | Originated loans [Member] | Home equity [Member] | No Score [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	3,602	[1]	3,914	[1]	'
Total consumer [Member] | Originated loans [Member] | Other consumer [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	1,957,279		1,031,944		711,343
Total consumer [Member] | Originated loans [Member] | Other consumer [Member] | Over 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	1,236,344		589,804		'
Total consumer [Member] | Originated loans [Member] | Other consumer [Member] | 660 - 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	379,540		232,474		'
Total consumer [Member] | Originated loans [Member] | Other consumer [Member] | 620 - 660 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	190,880		122,656		'
Total consumer [Member] | Originated loans [Member] | Other consumer [Member] | 580 - 620 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	70,612		45,545		'
Total consumer [Member] | Originated loans [Member] | Other consumer [Member] | Less Than 580 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	55,138		36,866		'
Total consumer [Member] | Originated loans [Member] | Other consumer [Member] | No Score [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	24,765	[1]	4,599	[1]	'
Total consumer [Member] | Acquired loans [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	2,810,150		3,621,175		'
Percent of total	100.00%		100.00%		'
Total consumer [Member] | Acquired loans [Member] | Over 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	2,034,381		2,472,164		'
Percent of total	72.40%		68.30%		'
Total consumer [Member] | Acquired loans [Member] | 660 - 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	230,217		348,035		'
Percent of total	8.20%		9.60%		'
Total consumer [Member] | Acquired loans [Member] | 620 - 660 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	142,100		206,865		'
Percent of total	5.10%		5.70%		'
Total consumer [Member] | Acquired loans [Member] | 580 - 620 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	92,997		136,302		'
Percent of total	3.30%		3.80%		'
Total consumer [Member] | Acquired loans [Member] | Less Than 580 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	112,898		192,595		'
Percent of total	4.00%		5.30%		'
Total consumer [Member] | Acquired loans [Member] | No Score [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	197,557	[1]	265,214	[1]	'
Percent of total	7.00%	[1]	7.30%	[1]	'
Total consumer [Member] | Acquired loans [Member] | Residential real estate [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	1,636,605		2,037,433		2,168,969
Total consumer [Member] | Acquired loans [Member] | Residential real estate [Member] | Over 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	1,130,390		1,353,416		'
Total consumer [Member] | Acquired loans [Member] | Residential real estate [Member] | 660 - 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	125,434		176,620		'
Total consumer [Member] | Acquired loans [Member] | Residential real estate [Member] | 620 - 660 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	77,683		103,628		'
Total consumer [Member] | Acquired loans [Member] | Residential real estate [Member] | 580 - 620 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	53,207		72,627		'
Total consumer [Member] | Acquired loans [Member] | Residential real estate [Member] | Less Than 580 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	73,729		109,337		'
Total consumer [Member] | Acquired loans [Member] | Residential real estate [Member] | No Score [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	176,162	[1]	221,805	[1]	'
Total consumer [Member] | Acquired loans [Member] | Home equity [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	1,169,668		1,365,648		1,429,873
Total consumer [Member] | Acquired loans [Member] | Home equity [Member] | Over 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	901,936		998,443		'
Total consumer [Member] | Acquired loans [Member] | Home equity [Member] | 660 - 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	103,897		136,160		'
Total consumer [Member] | Acquired loans [Member] | Home equity [Member] | 620 - 660 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	63,922		83,857		'
Total consumer [Member] | Acquired loans [Member] | Home equity [Member] | 580 - 620 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	39,547		53,708		'
Total consumer [Member] | Acquired loans [Member] | Home equity [Member] | Less Than 580 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	38,971		69,664		'
Total consumer [Member] | Acquired loans [Member] | Home equity [Member] | No Score [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	21,395	[1]	23,816	[1]	'
Total consumer [Member] | Acquired loans [Member] | Other consumer [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	3,877		218,094		344,873
Total consumer [Member] | Acquired loans [Member] | Other consumer [Member] | Over 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	2,055		120,305		'
Total consumer [Member] | Acquired loans [Member] | Other consumer [Member] | 660 - 700 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	886		35,255		'
Total consumer [Member] | Acquired loans [Member] | Other consumer [Member] | 620 - 660 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	495		19,380		'
Total consumer [Member] | Acquired loans [Member] | Other consumer [Member] | 580 - 620 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	243		9,967		'
Total consumer [Member] | Acquired loans [Member] | Other consumer [Member] | Less Than 580 [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	198		13,594		'
Total consumer [Member] | Acquired loans [Member] | Other consumer [Member] | No Score [Member]	'		'		'
Information about the credit quality of our consumer loan portfolio	'		'		'
Loans receivable	$0	[1]	$19,593	[1]	'
[1]	Primarily includes loans that are serviced by others for which refreshed FICO scores were not available as of the date indicated.

Loans_and_Leases_Summary_of_Tr

Loans and Leases - Summary of Troubled Debt Restructurings (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Aggregate recorded investment of impaired loans with terms through troubled debt restructuring	'		'
Accruing interest	$69,877		$46,280
Nonaccrual	53,405		42,244
Total troubled debt restructurings	$123,282	[1]	$88,524	[1]
[1]	Includes 63 and 44 acquired loans that were restructured with a recorded investment of $3.3 million and $2.9 million at September 30, 2013 and December 31, 2012

Loans_and_Leases_Troubled_Debt

Loans and Leases - Troubled Debt Restructuring by Concession Type (Details) (USD $)	3 Months Ended			9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
	Contract		Contract	Contract		Contract
Financing effects of our modifications	'		'	'		'
Count	85		281	228		316
Postmodification recorded investment	$9,383		$21,686	$51,720	[1]	$32,094	[1]
Premodification allowance for loan losses	824		814	3,557		1,448
Postmodification allowance for loan losses	294		267	1,523		846
Total commercial [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	12		'	28		19
Postmodification recorded investment	6,964		'	44,257	[1]	15,570	[1]
Premodification allowance for loan losses	804		'	3,518		1,441
Postmodification allowance for loan losses	238		'	1,365		100
Total commercial [Member] | Commercial real estate [Member] | Extension of term [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	1		1	5		8
Postmodification recorded investment	3,104		7,497	9,354	[1]	10,970	[1]
Premodification allowance for loan losses	252		812	634		993
Postmodification allowance for loan losses	0		0	510		0
Total commercial [Member] | Commercial real estate [Member] | Deferral of principal [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	'		'	1		1
Postmodification recorded investment	'		'	7,782	[1]	259
Premodification allowance for loan losses	'		'	429		14
Postmodification allowance for loan losses	'		'	0		0
Total commercial [Member] | Commercial real estate [Member] | Extension of term and rate reduction [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	'		'	6		'
Postmodification recorded investment	'		'	15,910	[1]	'
Premodification allowance for loan losses	'		'	740		'
Postmodification allowance for loan losses	'		'	438		'
Total commercial [Member] | Business [Member] | Extension of term [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	5		'	9		7
Postmodification recorded investment	2,998		'	10,237	[1]	3,643	[1]
Premodification allowance for loan losses	429		'	1,576		428
Postmodification allowance for loan losses	15		'	185		4
Total commercial [Member] | Business [Member] | Deferral of principal [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	'		'	'		1
Postmodification recorded investment	'		'	'		187
Premodification allowance for loan losses	'		'	'		0
Postmodification allowance for loan losses	'		'	'		0
Total commercial [Member] | Business [Member] | Rate reduction [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	'		'	'		1
Postmodification recorded investment	'		'	'		125
Premodification allowance for loan losses	'		'	'		0
Postmodification allowance for loan losses	'		'	'		0
Total commercial [Member] | Business [Member] | Combination of concession types [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	'		'	'		1
Postmodification recorded investment	'		'	'		386
Premodification allowance for loan losses	'		'	'		6
Postmodification allowance for loan losses	'		'	'		96
Total commercial [Member] | Business [Member] | Extension of term and rate reduction [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	6		'	7		'
Postmodification recorded investment	862		'	974	[1]	'
Premodification allowance for loan losses	123		'	139		'
Postmodification allowance for loan losses	223		'	232		'
Total consumer [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	73		280	200		297
Postmodification recorded investment	2,419		14,189	7,463	[1]	16,524	[1]
Premodification allowance for loan losses	20		2	39		7
Postmodification allowance for loan losses	56		267	158		746
Total consumer [Member] | Residential real estate [Member] | Extension of term [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	1		'	2		1
Postmodification recorded investment	173		'	291	[1]	91	[1]
Premodification allowance for loan losses	0		'	0		2
Postmodification allowance for loan losses	12		'	23		7
Total consumer [Member] | Residential real estate [Member] | Rate reduction [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	'		'	3		'
Postmodification recorded investment	'		'	109	[1]	'
Premodification allowance for loan losses	'		'	0		'
Postmodification allowance for loan losses	'		'	3		'
Total consumer [Member] | Residential real estate [Member] | Extension of term and rate reduction [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	4		'	10		7
Postmodification recorded investment	401		'	1,930	[1]	830	[1]
Premodification allowance for loan losses	0		'	1		1
Postmodification allowance for loan losses	34		'	78		216
Total consumer [Member] | Residential real estate [Member] | Chapter 7 bankruptcy [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	4		74	12		74
Postmodification recorded investment	324		5,417	760	[1]	5,417	[1]
Premodification allowance for loan losses	0		0	0		0
Postmodification allowance for loan losses	0		0	11		0
Total consumer [Member] | Residential real estate [Member] | Deferral of principal and extension of term [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	2		'	4		1
Postmodification recorded investment	102		'	151	[1]	613	[1]
Premodification allowance for loan losses	0		'	0		1
Postmodification allowance for loan losses	7		'	7		27
Total consumer [Member] | Residential real estate [Member] | Other [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	'		12	'		18
Postmodification recorded investment	'		1,625	'		2,302
Premodification allowance for loan losses	'		2	'		3
Postmodification allowance for loan losses	'		255	'		459
Total consumer [Member] | Home equity [Member] | Rate reduction [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	1		'	2		'
Postmodification recorded investment	37		'	126	[1]	'
Premodification allowance for loan losses	0		'	0		'
Postmodification allowance for loan losses	1		'	11		'
Total consumer [Member] | Home equity [Member] | Extension of term and rate reduction [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	1		'	2		2
Postmodification recorded investment	18		'	40	[1]	124	[1]
Premodification allowance for loan losses	0		'	0		0
Postmodification allowance for loan losses	0		'	0		25
Total consumer [Member] | Home equity [Member] | Chapter 7 bankruptcy [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	17		144	50		144
Postmodification recorded investment	545		5,636	1,866	[1]	5,636	[1]
Premodification allowance for loan losses	2		0	5		0
Postmodification allowance for loan losses	0		0	22		0
Total consumer [Member] | Home equity [Member] | Deferral of principal and extension of term [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	1		'	1		'
Postmodification recorded investment	111		'	111	[1]	'
Premodification allowance for loan losses	0		'	0		'
Postmodification allowance for loan losses	1		'	1		'
Total consumer [Member] | Home equity [Member] | Other [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	'		2	'		2
Postmodification recorded investment	'		69	'		69	[1]
Premodification allowance for loan losses	'		0	'		0
Postmodification allowance for loan losses	'		12	'		12
Total consumer [Member] | Other consumer [Member] | Chapter 7 bankruptcy [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	40		48	112		48
Postmodification recorded investment	637		1,442	2,008	[1]	1,442	[1]
Premodification allowance for loan losses	16		0	31		0
Postmodification allowance for loan losses	0		0	1		0
Total consumer [Member] | Other consumer [Member] | Rate reduction [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	1		'	1		'
Postmodification recorded investment	25	[1]	'	25	[1]	'
Premodification allowance for loan losses	1		'	1		'
Postmodification allowance for loan losses	1		'	1		'
Total consumer [Member] | Other consumer [Member] | Extension of term and rate reduction [Member]	'		'	'		'
Financing effects of our modifications	'		'	'		'
Count	1		'	1		'
Postmodification recorded investment	46	[1]	'	46	[1]	'
Premodification allowance for loan losses	1		'	1		'
Postmodification allowance for loan losses	$0		'	$0		'
[1]	Postmodification balances approximate premodification balances. The aggregate amount of charge-offs as a result of the restructurings was not significant.

Loans_and_Leases_Troubled_Debt1

Loans and Leases - Troubled Debt Restructurings which have Redefaulted (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Recorded investment in loans which have been modified	'	'	'	'
Recorded investment in TDRs	$0	$619	$76	$1,725
Total commercial [Member]	'	'	'	'
Recorded investment in loans which have been modified	'	'	'	'
Recorded investment in TDRs	0	619	0	1,725
Total commercial [Member] | Commercial real estate [Member]	'	'	'	'
Recorded investment in loans which have been modified	'	'	'	'
Recorded investment in TDRs	0	239	0	638
Total commercial [Member] | Business [Member]	'	'	'	'
Recorded investment in loans which have been modified	'	'	'	'
Recorded investment in TDRs	0	380	0	1,087
Total consumer [Member]	'	'	'	'
Recorded investment in loans which have been modified	'	'	'	'
Recorded investment in TDRs	0	0	76	0
Total consumer [Member] | Residential real estate [Member]	'	'	'	'
Recorded investment in loans which have been modified	'	'	'	'
Recorded investment in TDRs	0	0	0	0
Total consumer [Member] | Home equity [Member]	'	'	'	'
Recorded investment in loans which have been modified	'	'	'	'
Recorded investment in TDRs	0	0	76	0
Total consumer [Member] | Other consumer [Member]	'	'	'	'
Recorded investment in loans which have been modified	'	'	'	'
Recorded investment in TDRs	$0	$0	$0	$0

Loans_and_Leases_Information_a

Loans and Leases - Information about Residential Mortgage Banking (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Information about residential mortgage loans	'	'
Mortgages serviced for others	$3,574,124	$2,658,722
Mortgage servicing asset recorded for loans serviced for others, net	$33,571	$23,136

Loans_and_Leases_Details_Textu

Loans and Leases (Details Textual) (USD $)	9 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
	Segment		Contract
	payment
	Contract
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Number of segments in portfolio	2		'
Liability for Unfunded Commitments	$13,000,000		'
Provision for Credit Losses for Unfunded Commitments	1,200,000		'
Home equity portfolio	2,700,000,000		2,700,000,000
Portion of Home Equity Portfolio in First Lien Position	1,000,000,000		900,000,000
Percentage of home equity portfolio first lien loan hold and service	10.00%		10.00%
Other changes in nonaccretable yield	21,722,000	[1]	'
Carrying value of impaired loans, less related allowance, as percent of principal	68.00%		67.00%
Minimum number of payments of restructured loan	6		'
Nonaccrual loans not modified in TDR minimum	'less than $200 thousand		'
Troubled debt restructures acquired loan portfolio count	63		44
Troubled debt restructures acquired loan portfolio	$3,300,000		$2,900,000
[1]	Includes changes in expected cash flows from changes in interest rate and prepayment assumptions.

Derivative_Financial_Instrumen2

Derivative Financial Instruments - Notional Amount and Fair Value of Derivative Instruments (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Derivative financial instruments	'		'
Asset Derivatives, Notional Amount	$2,931,849		$2,195,025
Asset Derivatives, Fair Value	72,345	[1]	102,069	[1]
Liability Derivatives, Notional Amount	2,941,955		2,209,632
Liability Derivatives, Fair Value	73,035	[2]	104,697	[2]
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]	'		'
Derivative financial instruments	'		'
Asset Derivatives, Notional Amount	6,776		0
Asset Derivatives, Fair Value	172	[1]	0	[1]
Liability Derivatives, Notional Amount	26,379		14,607
Liability Derivatives, Fair Value	1,225	[2]	1,983	[2]
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]	'		'
Derivative financial instruments	'		'
Asset Derivatives, Notional Amount	2,925,073		2,195,025
Asset Derivatives, Fair Value	72,173	[1]	102,069	[1]
Liability Derivatives, Notional Amount	2,915,576		2,195,025
Liability Derivatives, Fair Value	$71,810	[2]	$102,714	[2]
[1]	Represents gross amounts, included in Other Assets in our Consolidated Statements of Condition.
[2]	Represents gross amounts, included in Other Liabilities in our Consolidated Statements of Condition.

Derivative_Financial_Instrumen3

Derivative Financial Instruments - Amount of Gain/Loss Recognized for Derivative Instruments (Details) (Interest Rate Swap [Member], Cash Flow Hedging [Member], USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Interest Rate Swap [Member] | Cash Flow Hedging [Member]	'		'		'		'
Interest rate swap agreements:	'		'		'		'
Amount of gain on derivatives recognized in other comprehensive income, net of tax	$184		$177		$530		$6,536
Amount of (loss) on derivatives reclassified from other comprehensive income to income	($286)	[1]	($286)	[1]	($848)	[1]	($15,146)	[2]
[1]	Recognized in interest expense on borrowings in our Consolidated Statements of Income.
[2]	Of this amount, $11.7 million was recognized in merger and acquisition integration expenses when the associated borrowings were repaid in connection with the HSBC Branch Acquisition and $3.4 million was recognized in interest expense on borrowings in our Consolidated Statements of Income.

Derivative_Financial_Instrumen4

Derivative Financial Instruments (Details Textual) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2012
					Customer swap [Member]	Customer swap [Member]	Merger and Acquisition expense [Member]	Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'	'	'	'	'
Net liability positions with counterparties	$49,000,000	'	'	'	'	'	'	'
Gross amounts of recognized liabilities to be offset with asset	72,000,000	'	'	'	'	'	'	'
Gross amount of asset offsetting liabilities in the Statement of Condition	23,000,000	'	'	'	'	'	'	'
Amount recognized in merger and acquisition integration expenses and interest expense	'	'	'	'	'	'	11,700,000	3,400,000
Collateral posted for net liability positions	7,000,000	125,000,000	'	'	'	'	'	'
Loss in accumulated other comprehensive income borrowings previously hedged	5,732,000	6,262,000	6,467,000	13,003,000	'	'	'	'
Derivative revenue	'	'	'	'	$13,500,000	$18,100,000	'	'

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Computation of basic and diluted earnings per share using two-class method	'	'	'	'
Net income available to common stockholders	$71,596	$50,837	$194,921	$87,116
Less income allocable to unvested restricted stock awards	453	200	1,030	283
Net income allocable to common stockholders	$71,143	$50,637	$193,891	$86,833
Weighted average common shares outstanding:	'	'	'	'
Total shares issued	366,002	366,002	366,002	366,002
Unallocated employee stock ownership plan shares	-2,090	-2,267	-2,134	-2,289
Unvested restricted stock awards	-2,224	-1,377	-1,818	-1,117
Treasury shares	-12,035	-13,357	-12,558	-13,640
Total basic weighted average common shares outstanding	349,653	349,001	349,492	348,956
Incremental shares from assumed exercise of stock options	14	0	0	0
Incremental shares from assumed vesting of restricted stock awards	1,229	370	876	292
Total diluted weighted average common shares outstanding	350,896	349,371	350,368	349,248
Basic earnings per common share	$0.20	$0.15	$0.55	$0.25
Diluted earnings per common share	$0.20	$0.14	$0.55	$0.25
Anti-dilutive stock options and restricted stock awards excluded from the diluted weighted average common share calculations	11,099	12,629	11,396	11,867

Other_Comprehensive_Income_Com

Other Comprehensive Income - Comprehensive Income (Loss) (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Securities available for sale:	'		'		'		'
Net unrealized holding (losses) gains arising during the period, pretax	($11,514)		$114,086		($155,943)		$172,098
Reclassification adjustment for realized (gains) included in net income, pretax	'		0		'		-15,895
Reclassification adjustment for net unrealized holding gains on securities transferred between available for sale and held to maturity, pretax	0		0		-54,872		4,054
Net unrealized (losses) gains on securities available for sale, pretax	-11,514		114,086		-210,815		160,257
Net unrealized holding (losses) gains arising during the period, tax	-4,302		43,169		-59,719		65,727
Reclassification adjustment for realized (gains) included in net income, tax	'		0		'		-6,097
Reclassification adjustment for net unrealized holding gains on securities transferred between available for sale and held to maturity, tax	0		0		-21,049		1,556
Net unrealized (losses) gains on securities available for sale, tax	-4,302		43,169		-80,768		61,186
Net unrealized holding (losses) gains arising during the period, net of tax	-7,212		70,917		-96,224		106,371
Reclassification adjustment for realized (gains) included in net income, net of tax	0		0		0		-9,798
Reclassification adjustment for net unrealized holding gains on securities transferred between available for sale and held to maturity, net of tax	0		0		-33,823		2,498
Net unrealized (losses) gains on securities available for sale, net of tax	-7,212		70,917		-130,047		99,071
Net unrealized holding gains on securities transferred between available for sale and held to maturity:	'		'		'		'
Net unrealized holding gains transferred during the period, pretax	0		0		54,872		-4,054
Amortization of net unrealized holding gains to income during the period, pre-tax	-6,325	[1]	-682	[1]	-15,673	[1]	-2,011	[1]
Net unrealized holding (losses) gains on securities transferred during the period, pre-tax	-6,325		-682		39,199		-6,065
Net unrealized holding gains transferred during the period, tax	0		0		21,049		-1,556
Amortization of net unrealized holding gains to income during the period, tax	-2,426	[1]	-260	[1]	-6,006	[1]	-749	[1]
Net unrealized holding (losses) gains on securities transferred during the period, tax	-2,426		-260		15,043		-2,305
Net unrealized holding gains transferred during the period, net of tax	0		0		33,823		-2,498
Amortization of net unrealized holding gains to income during the period, net of tax	-3,899	[1]	-422	[1]	-9,667	[1]	-1,262	[1]
Net unrealized holding (losses) gains on securities transferred during the period	-3,899		-422		24,156		-3,760
Interest rate swaps designated as cash flow hedges:	'		'		'		'
Net unrealized losses (gains) arising during the period, pretax	'		0		'		-4,590
Reclassification adjustment for realized losses included in net income, pretax	286	[2]	286	[2]	848	[2]	15,146	[2]
Net unrealized losses on interest rate swaps designated as cash flow hedges, pretax	'		286		'		10,556
Net unrealized losses (gains) arising during the period, tax	'		0		'		-1,789
Reclassification adjustment for realized losses included in net income, tax	102	[2]	109	[2]	318	[2]	5,809	[2]
Net unrealized losses on interest rate swaps designated as cash flow hedges, tax	'		109		'		4,020
Net unrealized losses (gains) arising during the period, net	'		0		'		-2,801
Reclassification adjustment for realized losses included in net income, net	184	[2]	177	[2]	530	[2]	9,337	[2]
Net unrealized losses on interest rate swaps designated as cash flow hedges, net	184		177		530		6,536
Pension and post-retirement plans:	'		'		'		'
Pension remeasurement, pretax	'		0		'		7,461
Amortization of net loss related to pension and post-retirement plans, pretax	'		362		'		1,128
Pension and post-retirement plans, pretax	48		362		143		8,589
Pension remeasurement, tax	'		0		'		2,849
Amortization of net loss related to pension and post-retirement plans, tax	'		139		'		584
Pension and post-retirement plans, tax	0		139		0		3,433
Pension remeasurement, net	0		0		0		4,612
Amortization of net loss related to pension and post-retirement plans, net	48		223		143		544
Total pension and post-retirement plans	48		223		143		5,156
Total other comprehensive (loss) income, pretax	-17,505		114,052		-170,625		173,337
Total other comprehensive (loss) income, tax	-6,626		43,157		-65,407		66,334
Total other comprehensive (loss) income	($10,879)		$70,895		($105,218)		$107,003
[1]	Included in Interest income on investment securities and other in our Consolidated Statement of Income.
[2]	Included in Interest expense on borrowings in our Consolidated Statement of Income.

Other_Comprehensive_Income_Cha

Other Comprehensive Income - Change in Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated other comprehensive income	'	'	'	'
Net unrealized gains on securities available for sale, beginning balance	'	'	$206,733,000	$105,276,000
Net unrealized (losses) gains on securities transferred from available for sale and held to maturity, beginning balance	'	'	-1,691,000	2,652,000
Unrealized (losses) gains on interest rate swaps designated as cash flow hedges, beginning balance	'	'	-6,262,000	-13,003,000
Pension and postretirement plans, beginning balance	'	'	-41,477,000	-27,113,000
Accumulated other comprehensive income, total, beginning balance	'	'	157,303,000	67,812,000
Net unrealized gains on securities available for sale, period change, net of tax	-7,212,000	70,917,000	-130,047,000	99,071,000
Net unrealized (losses) gains on securities transferred from available for sale and held to maturity, period change, net of tax	-3,899,000	-422,000	24,156,000	-3,760,000
Unrealized (losses) gains on interest rate swaps designated as cash flow hedges, period change, net of tax	184,000	177,000	530,000	6,536,000
Pension and post-retirement plans, period change, net of tax	48,000	223,000	143,000	5,156,000
Accumulated other comprehensive (loss) income, period change, net of tax	-10,879,000	70,895,000	-105,218,000	107,003,000
Net unrealized gains on securities available for sale, ending balance	76,686,000	204,347,000	76,686,000	204,347,000
Net unrealized (losses) gains on securities transferred from available for sale and held to maturity, ending balance	22,465,000	-1,108,000	22,465,000	-1,108,000
Unrealized (losses) gains on interest rate swaps designated as cash flow hedges, ending balance	-5,732,000	-6,467,000	-5,732,000	-6,467,000
Pension and postretirement plans, ending balance	-41,334,000	-21,957,000	-41,334,000	-21,957,000
Accumulated other comprehensive income, total, ending balance	52,085,000	174,815,000	52,085,000	174,815,000
Pre-tax net loss on cash flow hedges from accumulated other comprehensive income to earnings	'	'	$1,100,000	'

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Value, Option, Loans Held for Sale (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Loans held for sale	'	'
Fair value carrying amount	$80,468	$154,745
Aggregate unpaid principal balance	77,427	149,412
Fair value carrying amount less aggregate unpaid principal balance	$3,041	$5,333

Fair_Value_Measurements_Fair_V1

Fair Value Measurements - Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Assets:	'		'
Investment securities available for sale	$7,609,676		$10,993,605
Loans held for sale	80,468		154,745
Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,764,844		1,888,533
Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,569,046		4,512,906
Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,204,720		3,673,925
Commercial mortgage-backed securities, non-agency issued [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,863,116		2,060,221
Mortgage Backed Securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	3,432,162		6,573,127
Collateralized loan obligations, non-agency issued [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,466,125		1,544,865
States and political subdivisions [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	544,544		608,061
U.S. Treasury [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	20,511		20,707
U.S. government sponsored enterprises [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	325,387		403,892
Corporate [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	864,888		837,027
Trust preferred securities [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	5,340		14,195
Government National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	42,448		69,626
Government National Mortgage Association [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	'		1,091,157
Federal National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	150,262		414,462
Federal National Mortgage Association [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	794,804		1,474,428
Federal Home Loan Mortgage Corporation [Member] | Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	171,616		354,893
Federal Home Loan Mortgage Corporation [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	393,683		1,047,217
Non-agency issued [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	16,233		61,123
Fair Value, Measurements, Recurring [Member]	'		'
Assets:	'		'
Investment securities available for sale	7,609,676		10,993,605
Loans held for sale	80,468	[1]	154,745	[1]
Derivatives	49,259		102,069
Total assets	7,739,403		11,250,419
Liabilities:	'		'
Derivatives	49,949		104,697
Fair Value, Measurements, Recurring [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,764,844		1,888,533
Fair Value, Measurements, Recurring [Member] | Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,569,046		4,512,906
Fair Value, Measurements, Recurring [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,204,720		3,673,925
Fair Value, Measurements, Recurring [Member] | Mortgage Backed Securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	3,432,162		6,573,127
Fair Value, Measurements, Recurring [Member] | Collateralized loan obligations, non-agency issued [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,466,125		1,544,865
Fair Value, Measurements, Recurring [Member] | States and political subdivisions [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	544,544		608,061
Fair Value, Measurements, Recurring [Member] | U.S. Treasury [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	20,511		20,707
Fair Value, Measurements, Recurring [Member] | U.S. government agencies [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	4,174		4,651
Fair Value, Measurements, Recurring [Member] | U.S. government sponsored enterprises [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	325,387		403,892
Fair Value, Measurements, Recurring [Member] | Corporate [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	864,888		837,027
Fair Value, Measurements, Recurring [Member] | Trust preferred securities [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	5,340		14,195
Fair Value, Measurements, Recurring [Member] | Government National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	42,448		69,626
Fair Value, Measurements, Recurring [Member] | Government National Mortgage Association [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	'		1,091,157
Fair Value, Measurements, Recurring [Member] | Federal National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	150,262		414,462
Fair Value, Measurements, Recurring [Member] | Federal National Mortgage Association [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	794,804		1,474,428
Fair Value, Measurements, Recurring [Member] | Federal Home Loan Mortgage Corporation [Member] | Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	171,616		354,893
Fair Value, Measurements, Recurring [Member] | Federal Home Loan Mortgage Corporation [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	393,683		1,047,217
Fair Value, Measurements, Recurring [Member] | Collateralized mortgage obliations, non-agency issued [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	16,233		61,123
Fair Value, Measurements, Recurring [Member] | Non-agency issued [Member] | Commercial mortgage-backed securities, non-agency issued [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,863,116		2,060,221
Fair Value, Measurements, Recurring [Member] | Asset-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	914,244		955,641
Fair Value, Measurements, Recurring [Member] | Asset-backed securities [Member] | Student Loans [Member]	'		'
Assets:	'		'
Investment securities available for sale	317,513		389,741
Fair Value, Measurements, Recurring [Member] | Asset-backed securities [Member] | Credit cards [Member]	'		'
Assets:	'		'
Investment securities available for sale	73,023		75,075
Fair Value, Measurements, Recurring [Member] | Asset-backed securities [Member] | Auto Loans [Member]	'		'
Assets:	'		'
Investment securities available for sale	336,552		372,166
Fair Value, Measurements, Recurring [Member] | Asset-backed securities [Member] | Other Loans [Member]	'		'
Assets:	'		'
Investment securities available for sale	187,156		118,659
Fair Value, Measurements, Recurring [Member] | Other securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	32,301		31,439
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]	'		'
Assets:	'		'
Investment securities available for sale	42,987		44,018
Total assets	42,987		44,018
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	20,511		20,707
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | U.S. Treasury [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	20,511		20,707
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	22,476		23,311
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]	'		'
Assets:	'		'
Investment securities available for sale	6,095,224		9,390,527
Loans held for sale	80,468	[1]	154,745	[1]
Derivatives	49,259		102,069
Total assets	6,224,951		9,647,341
Liabilities:	'		'
Derivatives	49,949		104,697
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,738,993		1,853,631
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,569,046		4,512,906
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,204,720		3,673,925
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Mortgage Backed Securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	3,432,162		6,573,127
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | States and political subdivisions [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	544,544		608,061
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. government agencies [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	4,174		4,651
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. government sponsored enterprises [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	325,387		403,892
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Corporate [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	864,888		837,027
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Government National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	42,448		69,626
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Government National Mortgage Association [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	'		1,091,157
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Federal National Mortgage Association [Member] | Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	150,262		414,462
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Federal National Mortgage Association [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	794,804		1,474,428
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Federal Home Loan Mortgage Corporation [Member] | Residential mortgage-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	171,616		354,893
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Federal Home Loan Mortgage Corporation [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	393,683		1,047,217
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Collateralized mortgage obliations, non-agency issued [Member] | Collateralized mortgage obligations [Member]	'		'
Assets:	'		'
Investment securities available for sale	16,233		61,123
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Non-agency issued [Member] | Commercial mortgage-backed securities, non-agency issued [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,863,116		2,060,221
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Asset-backed securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	914,244		955,641
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Asset-backed securities [Member] | Student Loans [Member]	'		'
Assets:	'		'
Investment securities available for sale	317,513		389,741
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Asset-backed securities [Member] | Credit cards [Member]	'		'
Assets:	'		'
Investment securities available for sale	73,023		75,075
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Asset-backed securities [Member] | Auto Loans [Member]	'		'
Assets:	'		'
Investment securities available for sale	336,552		372,166
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Asset-backed securities [Member] | Other Loans [Member]	'		'
Assets:	'		'
Investment securities available for sale	187,156		118,659
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	9,825		8,128
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,471,465		1,559,060
Total assets	1,471,465		1,559,060
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	5,340		14,195
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Collateralized loan obligations, non-agency issued [Member]	'		'
Assets:	'		'
Investment securities available for sale	1,466,125		1,544,865
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Trust preferred securities [Member] | Debt securities [Member]	'		'
Assets:	'		'
Investment securities available for sale	$5,340		$14,195
[1]	Represents loans for which we have elected the fair value option.

Fair_Value_Measurements_Fair_V2

Fair Value Measurements - Fair Value, Assets and Liabilities Measured on Nonrecurring Basis (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified			Level 1 [Member]	Level 1 [Member]	Level 2 [Member]	Level 2 [Member]	Level 2 [Member]	Level 3 [Member]	Level 3 [Member]	Collateral Dependent Impaired Loans [Member]	Collateral Dependent Impaired Loans [Member]
Summary of assets and liabilities measured at fair value on a nonrecurring basis	'	'	'	'	'	'	'	'	'	'	'
Collateral dependent impaired loans	$23,694	$35,651	$0	$0	$13,708	$31,000	$20,490	$9,986	$15,161	'	'
Total gains (losses)	'	'	'	'	'	'	'	'	'	($423)	($2,889)

Fair_Value_Measurements_Change

Fair Value Measurements - Change in Level 3 Assets Measured on Recurring Basis (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Changes in Level 3 assets and liabilities measurerd at estimated fair value on a recurring basis [Roll Forward]	'	'
Balance at beginning of period	$1,559,060	$25,032
Transfers from level 2	'	157,999	[1]
Purchases	73,392	1,081,678
Settlements	-168,149	-12,199
Gains included in other comprehensive income	7,907	33,827
Losses included in earnings	-745	-446
Balance at end of period	1,471,465	1,285,891
Trust preferred securities [Member]	'	'
Changes in Level 3 assets and liabilities measurerd at estimated fair value on a recurring basis [Roll Forward]	'	'
Balance at beginning of period	14,195	25,032
Settlements	-8,854	-12,199
Gains included in other comprehensive income	703	2,923
Losses included in earnings	-704	-446
Balance at end of period	5,340	15,310
Collateralized loan obligations [Member]	'	'
Changes in Level 3 assets and liabilities measurerd at estimated fair value on a recurring basis [Roll Forward]	'	'
Balance at beginning of period	1,544,865	0
Transfers from level 2	0	157,999	[1]
Purchases	73,392	1,081,678
Settlements	-159,295	0
Gains included in other comprehensive income	7,204	30,904
Losses included in earnings	-41	0
Balance at end of period	$1,466,125	$1,270,581
[1]	Our policy is to recognize the transfer at the beginning of the period.

Fair_Value_Measurements_Levle_

Fair Value Measurements - Levle 3 Fair Value Measurements Valuation Techniques and Inputs (Details) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
	Spreads	Spreads
Collateralized loan obligations, non-agency issued [Member] | Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Valuation techniques	'	'Internally modeled
Unobservable input	'	'Market spreads
Collateralized loan obligations, non-agency issued [Member] | Level 3 [Member] | Weighted Average [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Spreads	0	213
Collateralized loan obligations, non-agency issued [Member] | Level 3 [Member] | Minimum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Spreads	0	150
Collateralized loan obligations, non-agency issued [Member] | Level 3 [Member] | Maximum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Spreads	0	550
Collateralized loan obligations, non-agency issued [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available for sale securities broker price adjusted	'	1,544,865

Fair_Value_Measurements_Fair_V3

Fair Value Measurements - Fair Value of Financial Instruments by Balance Sheet Grouping (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Financial assets:	'		'		'	'
Cash and cash equivalents	$558,086		$430,862		$447,087	$836,555
Investment securities available for sale	7,609,676		10,993,605		'	'
Investment securities held to maturity	3,839,863		1,373,971		'	'
Federal Home Loan Bank and Federal Reserve Bank common stock	437,534		420,277		'	'
Loans held for sale	80,468		154,745		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Level 1 [Member]	'		'		'	'
Financial assets:	'		'		'	'
Cash and cash equivalents	558,086		430,862		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair value inputs level 1, 2, 3 [Member]	'		'		'	'
Financial assets:	'		'		'	'
Investment securities available for sale	7,609,676	[1]	10,993,605	[1]	'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Level 2 [Member]	'		'		'	'
Financial assets:	'		'		'	'
Investment securities held to maturity	3,841,700		1,299,806		'	'
Federal Home Loan Bank and Federal Reserve Bank common stock	437,534		420,277		'	'
Loans held for sale	80,468		154,745		'	'
Derivatives	49,259		102,069		'	'
Accrued interest receivable	108,345		107,757		'	'
Financial liabilities:	'		'		'	'
Deposits	26,969,002		27,676,531		'	'
Borrowings	4,901,963		3,716,143		'	'
Derivatives	49,949		104,697		'	'
Accrued interest payable	10,925		9,695		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair value inputs level 2, 3 [Member]	'		'		'	'
Financial assets:	'		'		'	'
Loans and leases, net	20,891,118	[2]	19,547,490	[2]	'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 [Member]	'		'		'	'
Financial assets:	'		'		'	'
Cash and cash equivalents	558,086		430,862		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair value inputs level 1, 2, 3 [Member]	'		'		'	'
Financial assets:	'		'		'	'
Investment securities available for sale	7,609,676	[1]	10,993,605	[1]	'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 [Member]	'		'		'	'
Financial assets:	'		'		'	'
Investment securities held to maturity	3,839,863		1,373,971		'	'
Federal Home Loan Bank and Federal Reserve Bank common stock	437,534		420,277		'	'
Loans held for sale	80,468		154,745		'	'
Derivatives	49,259		102,069		'	'
Accrued interest receivable	108,345		107,757		'	'
Financial liabilities:	'		'		'	'
Deposits	27,121,761		27,852,175		'	'
Borrowings	4,860,013		3,773,787		'	'
Derivatives	49,949		104,697		'	'
Accrued interest payable	10,925		9,695		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair value inputs level 2, 3 [Member]	'		'		'	'
Financial assets:	'		'		'	'
Loans and leases, net	$21,307,115	[2]	$20,213,465	[2]	'	'
[1]	For a detailed breakout of our investment securities available for sale, refer to our table of recurring fair value measurements.
[2]	Loans and leases classified as level 2 are made up of $14 million and $31 million of collateral dependent impaired loans without significant adjustments made to appraised values at September 30, 2013 and December 31, 2012, respectively. All other loans and leases are classified as level 3.

Fair_Value_Measurements_Detail

Fair Value Measurements (Details Textual) (USD $)

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Mar. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Collateralized loan obligations [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Collateral Dependent Impaired Loans [Member]

Collateral Dependent Impaired Loans [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Investment securities price at broker quotes

$1,600,000,000

'

'

'

'

'

'

'

'

'

'

Investment securities internally priced

0

'

'

'

'

'

'

'

'

'

'

Loans held for sale, nonaccrual or 90 or more days past due

0

'

0

'

'

'

'

'

'

'

'

Transfers from level 2

'

157,999,000

[1]

'

158,000,000

'

'

'

'

'

'

'

Transfers of assets or liabilities

0

'

'

'

'

'

'

'

'

'

'

Maximum days for completion of appraisals or evaluations for assets

'90 days

'

'

'

'

'

'

'

'

'

'

Net increase in allowance for credit losses

'

'

'

'

'

'

400,000

2,900,000

'

'

'

Collateral dependent impaired loans fair value disclosure

'

'

'

'

$23,694,000

$35,651,000

'

'

$13,708,000

$31,000,000

$20,490,000

Original maturity period for cash and cash equivalents (3 months or less)

'3 months

'

'

'

'

'

'

'

'

'

'

[1]

Our policy is to recognize the transfer at the beginning of the period.

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
			Segment
Segment Reporting Information [Line Items]	'	'	'	'
Number of Reportable Segments	'	'	2	'
Financial information of business segments	'	'	'	'
Net interest income	$277,540	$269,605	$813,113	$770,989
Provision for credit losses	27,600	22,200	73,000	70,300
Net interest income after provision for credit losses	249,940	247,405	740,113	700,689
Noninterest income	91,422	102,203	276,280	267,709
Amortization of core deposits and other intangibles	7,702	14,506	32,671	30,811
Other noninterest expense	223,491	252,036	671,358	781,548
Income before income taxes	110,169	83,066	312,364	156,039
Income tax expense (benefit)	31,026	24,682	94,802	48,714
Net income	79,143	58,384	217,562	107,325
Banking [Member]	'	'	'	'
Financial information of business segments	'	'	'	'
Net interest income	277,540	269,610	813,113	771,012
Provision for credit losses	27,600	22,200	73,000	70,300
Net interest income after provision for credit losses	249,940	247,410	740,113	700,712
Noninterest income	73,511	83,472	224,309	215,305
Amortization of core deposits and other intangibles	6,856	13,468	30,058	27,551
Other noninterest expense	210,256	239,007	632,268	743,072
Income before income taxes	106,339	78,407	302,096	145,394
Income tax expense (benefit)	29,549	22,895	90,855	44,631
Net income	76,790	55,512	211,241	100,763
Financial services [Member]	'	'	'	'
Financial information of business segments	'	'	'	'
Net interest income	0	-5	0	-23
Provision for credit losses	0	0	0	0
Net interest income after provision for credit losses	0	-5	0	-23
Noninterest income	17,911	18,731	51,971	52,404
Amortization of core deposits and other intangibles	846	1,038	2,613	3,260
Other noninterest expense	13,235	13,029	39,090	38,476
Income before income taxes	3,830	4,659	10,268	10,645
Income tax expense (benefit)	1,477	1,787	3,947	4,083
Net income	$2,353	$2,872	$6,321	$6,562