Loans (Accruing And Non-Accruing Loans By Class) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 15,812,017,000		$ 15,389,074,000		$ 15,408,556,000
Commercial Financial And Industrial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	8,435,947,000				7,644,217,000
Total Non-Accruing	41,382,000				102,725,000
Loans, net of unearned income	8,477,329,000		7,923,576,000		7,746,942,000
Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	5,007,477,000				5,336,090,000
Total Non-Accruing	123,511,000				121,957,000
Loans, net of unearned income	5,130,988,000	[1]	5,333,371,000	[1]	5,458,047,000	[1]
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	1,264,207,000				1,148,723,000
Total Non-Accruing	14,187,000				24,988,000
Loans, net of unearned income	1,278,394,000		1,133,279,000		1,173,711,000
Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	538,815,000				660,721,000
Total Non-Accruing	33,974,000				36,973,000
Loans, net of unearned income	572,789,000		662,242,000	[2]	697,694,000	[2]
Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	351,825,000				330,763,000
Total Non-Accruing	692,000				1,399,000
Loans, net of unearned income	352,517,000		336,606,000		332,162,000
General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	7,147,478,000				6,568,097,000
Total Non-Accruing	28,377,000				65,526,000
Loans, net of unearned income	7,175,855,000				6,633,623,000
Loans To Mortgage Companies [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	957,511,000				732,366,000
Total Non-Accruing	130,000				335,000
Loans, net of unearned income	957,641,000				732,701,000
TRUPs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	325,882,000	[3]			336,042,000	[4]
Total Non-Accruing	12,875,000	[3]			36,864,000	[4]
Loans, net of unearned income	338,757,000	[3]			372,906,000	[4]
LOCOM valuation allowance	26,200,000				29,400,000
Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	1,189,376,000				1,077,712,000
Total Non-Accruing	11,781,000				20,593,000
Loans, net of unearned income	1,201,157,000				1,098,305,000
Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	40,438,000				31,366,000
Total Non-Accruing	2,406,000				4,395,000
Loans, net of unearned income	42,844,000				35,761,000
Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	2,473,443,000				2,815,049,000
Total Non-Accruing	84,852,000				81,483,000
Loans, net of unearned income	2,558,295,000				2,896,532,000
R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	2,533,391,000				2,520,153,000
Total Non-Accruing	38,659,000				40,474,000
Loans, net of unearned income	2,572,050,000				2,560,627,000
Credit Card Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	188,372,000				189,487,000
Total Non-Accruing	0				0
Loans, net of unearned income	188,372,000				189,487,000
Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	163,442,000				141,261,000
Total Non-Accruing	692,000				1,399,000
Loans, net of unearned income	164,134,000				142,660,000
C I Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	5,076,000				7,712,000
Total Non-Accruing	0				0
Loans, net of unearned income	5,076,000				7,712,000
C R E Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	34,393,000				39,645,000
Total Non-Accruing	0				0
Loans, net of unearned income	34,393,000				39,645,000
R E Installment Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	643,000				888,000
Total Non-Accruing	0				0
Loans, net of unearned income	643,000				888,000
Other Purchased Credit-Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	11,000				15,000
Total Non-Accruing	0				0
Loans, net of unearned income	11,000				15,000
Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	15,511,957,000				15,026,344,000
30-89 Days Past Due	57,432,000				60,324,000
90+ Days Past Due	28,882,000				33,846,000
Total Accruing	15,598,271,000				15,120,514,000
Accruing [Member] | Commercial Financial And Industrial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	8,427,699,000				7,635,506,000
30-89 Days Past Due	6,531,000				8,464,000
90+ Days Past Due	1,717,000				247,000
Accruing [Member] | Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,954,330,000				5,278,746,000
30-89 Days Past Due	36,537,000				38,228,000
90+ Days Past Due	16,610,000				19,116,000
Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,260,029,000				1,141,623,000
30-89 Days Past Due	3,639,000				6,252,000
90+ Days Past Due	539,000				848,000
Accruing [Member] | Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	523,150,000				643,385,000
30-89 Days Past Due	7,635,000				5,097,000
90+ Days Past Due	8,030,000				12,239,000
Accruing [Member] | Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	346,749,000				327,084,000
30-89 Days Past Due	3,090,000				2,283,000
90+ Days Past Due	1,986,000				1,396,000
Accruing [Member] | General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	7,140,246,000				6,560,688,000
30-89 Days Past Due	5,515,000				7,314,000
90+ Days Past Due	1,717,000				95,000
Accruing [Member] | Loans To Mortgage Companies [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	956,861,000				731,684,000
30-89 Days Past Due	650,000				682,000
90+ Days Past Due	0				0
Accruing [Member] | TRUPs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	325,882,000	[3]			336,042,000	[4]
30-89 Days Past Due	0	[3]			0	[4]
90+ Days Past Due	0	[3]			0	[4]
Accruing [Member] | Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,186,595,000				1,071,839,000
30-89 Days Past Due	2,781,000				5,438,000
90+ Days Past Due	0				435,000
Accruing [Member] | Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	40,249,000				31,189,000
30-89 Days Past Due	189,000				177,000
90+ Days Past Due	0				0
Accruing [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	2,437,982,000				2,778,336,000
30-89 Days Past Due	23,816,000				24,072,000
90+ Days Past Due	11,645,000				12,641,000
Accruing [Member] | R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	2,515,705,000				2,499,522,000
30-89 Days Past Due	12,721,000				14,156,000
90+ Days Past Due	4,965,000				6,475,000
Accruing [Member] | Credit Card Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	184,650,000				186,749,000
30-89 Days Past Due	1,900,000				1,480,000
90+ Days Past Due	1,822,000				1,258,000
Accruing [Member] | Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	162,088,000				140,320,000
30-89 Days Past Due	1,190,000				803,000
90+ Days Past Due	164,000				138,000
Accruing [Member] | C I Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,710,000				7,092,000
30-89 Days Past Due	366,000				468,000
90+ Days Past Due	0				152,000
Accruing [Member] | C R E Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	33,185,000				38,595,000
30-89 Days Past Due	669,000				637,000
90+ Days Past Due	539,000				413,000
Accruing [Member] | R E Installment Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	643,000				888,000
30-89 Days Past Due	0				0
90+ Days Past Due	0				0
Accruing [Member] | Other Purchased Credit-Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	11,000				15,000
30-89 Days Past Due	0				0
90+ Days Past Due	0				0
Non Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	133,255,000				146,857,000
30-89 Days Past Due	14,969,000				13,500,000
90+ Days Past Due	65,522,000				127,685,000
Total Non-Accruing	213,746,000				288,042,000
Non Accruing [Member] | Commercial Financial And Industrial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	18,478,000				33,582,000
30-89 Days Past Due	1,469,000				3,610,000
90+ Days Past Due	21,435,000				65,533,000
Non Accruing [Member] | Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	98,091,000				91,282,000
30-89 Days Past Due	8,369,000				8,569,000
90+ Days Past Due	17,051,000				22,106,000
Non Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,471,000				7,076,000
30-89 Days Past Due	1,068,000				0
90+ Days Past Due	11,648,000				17,912,000
Non Accruing [Member] | Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	15,215,000				13,518,000
30-89 Days Past Due	4,063,000				1,321,000
90+ Days Past Due	14,696,000				22,134,000
Non Accruing [Member] | Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0				1,399,000
30-89 Days Past Due	0				0
90+ Days Past Due	692,000				0
Non Accruing [Member] | General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	5,603,000				33,582,000
30-89 Days Past Due	1,469,000				3,610,000
90+ Days Past Due	21,305,000				28,334,000
Non Accruing [Member] | Loans To Mortgage Companies [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0				0
30-89 Days Past Due	0				0
90+ Days Past Due	130,000				335,000
Non Accruing [Member] | TRUPs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	12,875,000	[3]			0	[4]
30-89 Days Past Due	0	[3]			0	[4]
90+ Days Past Due	0	[3]			36,864,000	[4]
Non Accruing [Member] | Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	217,000				6,791,000
30-89 Days Past Due	1,068,000				0
90+ Days Past Due	10,496,000				13,802,000
Non Accruing [Member] | Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,254,000				285,000
30-89 Days Past Due	0				0
90+ Days Past Due	1,152,000				4,110,000
Non Accruing [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	68,785,000				61,733,000
30-89 Days Past Due	5,784,000				5,521,000
90+ Days Past Due	10,283,000				14,229,000
Non Accruing [Member] | R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	29,306,000				29,549,000
30-89 Days Past Due	2,585,000				3,048,000
90+ Days Past Due	6,768,000				7,877,000
Non Accruing [Member] | Credit Card Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0				0
30-89 Days Past Due	0				0
90+ Days Past Due	0				0
Non Accruing [Member] | Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0				1,399,000
30-89 Days Past Due	0				0
90+ Days Past Due	692,000				0
Non Accruing [Member] | C I Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0				0
30-89 Days Past Due	0				0
90+ Days Past Due	0				0
Non Accruing [Member] | C R E Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0				0
30-89 Days Past Due	0				0
90+ Days Past Due	0				0
Non Accruing [Member] | R E Installment Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0				0
30-89 Days Past Due	0				0
90+ Days Past Due	0				0
Non Accruing [Member] | Other Purchased Credit-Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0				0
30-89 Days Past Due	0				0
90+ Days Past Due	$ 0				$ 0

[1] Balances as of September 30, 2014 and 2013, and December 31, 2013 include $81.1 million, $349.3 million, and $333.8 million of restricted and secured real estate loans, respectively. See Note 14 - Variable Interest Entities for additional information.

[2] Balances as of September 30, 2013, and December 31, 2013 include $11.7 million and $11.2 million of restricted and secured real estate loans, respectively. See Note 14 - Variable Interest Entities for additional information.

[3] Total TRUPS includes LOCOM valuation allowance of $26.2 million.

[4] Total TRUPS includes LOCOM valuation allowance of $29.4 million.