Loans (Accruing And Non-Accruing Loans By Class) (Details) (USD $)	Jun. 30, 2013		Dec. 31, 2012	Jun. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 16,197,046,000		$ 16,708,582,000	$ 16,185,763,000
TRUPs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
LOCOM valuation allowance	29,900,000			34,200,000
Commercial Financial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	8,367,161,000			7,981,365,000
Commercial Financial And Industrial [Member] | General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	6,594,077,000			6,294,391,000
Commercial Financial And Industrial [Member] | Loans To Mortgage Companies [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,387,022,000			1,274,001,000
Commercial Financial And Industrial [Member] | TRUPs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	382,476,000	[1]		412,973,000	[2]
Commercial Financial And Industrial [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,586,000
Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,549,440,000			5,855,564,000
Consumer Real Estate Portfolio Segment [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,015,880,000			3,488,330,000
Consumer Real Estate Portfolio Segment [Member] | R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,532,878,000			2,367,234,000
Consumer Real Estate Portfolio Segment [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	682,000
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,218,206,000			1,314,169,000
Commercial Real Estate Portfolio Segment [Member] | Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,134,554,000			1,224,944,000
Commercial Real Estate Portfolio Segment [Member] | Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	46,305,000			89,225,000
Commercial Real Estate Portfolio Segment [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	37,347,000
Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	746,154,000			755,707,000
Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	316,085,000			278,958,000
Credit Card And Other Portfolio Segment [Member] | Credit Card Portfolio Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	187,378,000			184,647,000
Credit Card And Other Portfolio Segment [Member] | Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	128,689,000			94,311,000
Credit Card And Other Portfolio Segment [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	18,000
Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	15,782,784,000			15,724,802,000
30-89 Days Past Due	69,081,000			92,542,000
90+ Days Past Due	31,047,000			39,999,000
Total Accruing	15,882,912,000			15,857,343,000
Accruing [Member] | Commercial Financial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	8,235,546,000			7,801,196,000
30-89 Days Past Due	9,812,000			21,152,000
90+ Days Past Due	650,000			1,735,000
Total Accruing	8,246,008,000			7,824,083,000
Accruing [Member] | Commercial Financial And Industrial [Member] | General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	6,509,238,000			6,189,015,000
30-89 Days Past Due	9,812,000			21,152,000
90+ Days Past Due	650,000			1,735,000
Total Accruing	6,519,700,000			6,211,902,000
Accruing [Member] | Commercial Financial And Industrial [Member] | Loans To Mortgage Companies [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,386,679,000			1,274,001,000
30-89 Days Past Due	0			0
90+ Days Past Due	0			0
Total Accruing	1,386,679,000			1,274,001,000
Accruing [Member] | Commercial Financial And Industrial [Member] | TRUPs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	336,043,000	[1]		338,180,000	[2]
30-89 Days Past Due	0	[1]		0	[2]
90+ Days Past Due	0	[1]		0	[2]
Total Accruing	336,043,000	[1]		338,180,000	[2]
Accruing [Member] | Commercial Financial And Industrial [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	3,586,000
30-89 Days Past Due	0
90+ Days Past Due	0
Total Accruing	3,586,000
Accruing [Member] | Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	5,368,746,000			5,733,546,000
30-89 Days Past Due	39,152,000			50,196,000
90+ Days Past Due	22,008,000			30,989,000
Total Accruing	5,429,906,000			5,814,731,000
Accruing [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	2,896,298,000			3,410,676,000
30-89 Days Past Due	24,339,000			31,603,000
90+ Days Past Due	15,830,000			20,401,000
Total Accruing	2,936,467,000			3,462,680,000
Accruing [Member] | Consumer Real Estate Portfolio Segment [Member] | R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	2,471,921,000			2,322,870,000
30-89 Days Past Due	14,658,000			18,593,000
90+ Days Past Due	6,178,000			10,588,000
Total Accruing	2,492,757,000			2,352,051,000
Accruing [Member] | Consumer Real Estate Portfolio Segment [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	527,000
30-89 Days Past Due	155,000
90+ Days Past Due	0
Total Accruing	682,000
Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,178,218,000			1,205,622,000
30-89 Days Past Due	6,060,000			12,481,000
90+ Days Past Due	546,000			0
Total Accruing	1,184,824,000			1,218,103,000
Accruing [Member] | Commercial Real Estate Portfolio Segment [Member] | Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,105,815,000			1,161,209,000
30-89 Days Past Due	5,001,000			6,508,000
90+ Days Past Due	463,000			0
Total Accruing	1,111,279,000			1,167,717,000
Accruing [Member] | Commercial Real Estate Portfolio Segment [Member] | Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	35,995,000			44,413,000
30-89 Days Past Due	203,000			5,973,000
90+ Days Past Due	0			0
Total Accruing	36,198,000			50,386,000
Accruing [Member] | Commercial Real Estate Portfolio Segment [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	36,408,000
30-89 Days Past Due	856,000
90+ Days Past Due	83,000
Total Accruing	37,347,000
Accruing [Member] | Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	689,059,000			711,111,000
30-89 Days Past Due	12,211,000			6,775,000
90+ Days Past Due	6,529,000			5,650,000
Total Accruing	707,799,000			723,536,000
Accruing [Member] | Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	311,215,000			273,327,000
30-89 Days Past Due	1,846,000			1,938,000
90+ Days Past Due	1,314,000			1,625,000
Total Accruing	314,375,000			276,890,000
Accruing [Member] | Credit Card And Other Portfolio Segment [Member] | Credit Card Portfolio Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	184,687,000			181,792,000
30-89 Days Past Due	1,475,000			1,569,000
90+ Days Past Due	1,216,000			1,286,000
Total Accruing	187,378,000			184,647,000
Accruing [Member] | Credit Card And Other Portfolio Segment [Member] | Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	126,511,000			91,535,000
30-89 Days Past Due	370,000			369,000
90+ Days Past Due	98,000			339,000
Total Accruing	126,979,000			92,243,000
Accruing [Member] | Credit Card And Other Portfolio Segment [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	17,000
30-89 Days Past Due	1,000
90+ Days Past Due	0
Total Accruing	18,000
Non Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	147,429,000			116,259,000
30-89 Days Past Due	18,734,000			15,229,000
90+ Days Past Due	147,971,000			196,932,000
Total Non-Accruing	314,134,000			328,420,000
Non Accruing [Member] | Commercial Financial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	33,855,000			43,834,000
30-89 Days Past Due	8,398,000			7,752,000
90+ Days Past Due	78,900,000			105,696,000
Total Non-Accruing	121,153,000			157,282,000
Non Accruing [Member] | Commercial Financial And Industrial [Member] | General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	33,855,000			43,834,000
30-89 Days Past Due	8,398,000			7,752,000
90+ Days Past Due	32,124,000			30,903,000
Total Non-Accruing	74,377,000			82,489,000
Non Accruing [Member] | Commercial Financial And Industrial [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	343,000			0
Total Non-Accruing	343,000			0
Non Accruing [Member] | Commercial Financial And Industrial [Member] | TRUPs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0	[1]		0	[2]
30-89 Days Past Due	0	[1]		0	[2]
90+ Days Past Due	46,433,000	[1]		74,793,000	[2]
Total Non-Accruing	46,433,000	[1]		74,793,000	[2]
Non Accruing [Member] | Commercial Financial And Industrial [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0
30-89 Days Past Due	0
90+ Days Past Due	0
Total Non-Accruing	0
Non Accruing [Member] | Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	91,557,000			22,149,000
30-89 Days Past Due	8,910,000			3,327,000
90+ Days Past Due	19,067,000			15,357,000
Total Non-Accruing	119,534,000			40,833,000
Non Accruing [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	62,663,000			13,852,000
30-89 Days Past Due	5,549,000			1,906,000
90+ Days Past Due	11,201,000			9,892,000
Total Non-Accruing	79,413,000			25,650,000
Non Accruing [Member] | Consumer Real Estate Portfolio Segment [Member] | R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	28,894,000			8,297,000
30-89 Days Past Due	3,361,000			1,421,000
90+ Days Past Due	7,866,000			5,465,000
Total Non-Accruing	40,121,000			15,183,000
Non Accruing [Member] | Consumer Real Estate Portfolio Segment [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0
30-89 Days Past Due	0
90+ Days Past Due	0
Total Non-Accruing	0
Non Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	5,151,000			36,954,000
30-89 Days Past Due	0			1,851,000
90+ Days Past Due	28,231,000			57,261,000
Total Non-Accruing	33,382,000			96,066,000
Non Accruing [Member] | Commercial Real Estate Portfolio Segment [Member] | Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	4,403,000			17,449,000
30-89 Days Past Due	0			930,000
90+ Days Past Due	18,872,000			38,848,000
Total Non-Accruing	23,275,000			57,227,000
Non Accruing [Member] | Commercial Real Estate Portfolio Segment [Member] | Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	748,000			19,505,000
30-89 Days Past Due	0			921,000
90+ Days Past Due	9,359,000			18,413,000
Total Non-Accruing	10,107,000			38,839,000
Non Accruing [Member] | Commercial Real Estate Portfolio Segment [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0
30-89 Days Past Due	0
90+ Days Past Due	0
Total Non-Accruing	0
Non Accruing [Member] | Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	15,161,000			13,054,000
30-89 Days Past Due	1,421,000			2,299,000
90+ Days Past Due	21,773,000			16,818,000
Total Non-Accruing	38,355,000			32,171,000
Non Accruing [Member] | Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,705,000			268,000
30-89 Days Past Due	5,000			0
90+ Days Past Due	0			1,800,000
Total Non-Accruing	1,710,000			2,068,000
Non Accruing [Member] | Credit Card And Other Portfolio Segment [Member] | Credit Card Portfolio 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
Total Non-Accruing	0			0
Non Accruing [Member] | Credit Card And Other Portfolio Segment [Member] | Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,705,000			268,000
30-89 Days Past Due	5,000			0
90+ Days Past Due	0			1,800,000
Total Non-Accruing	1,710,000			2,068,000
Non Accruing [Member] | Credit Card And Other Portfolio Segment [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0
30-89 Days Past Due	0
90+ Days Past Due	0
Total Non-Accruing	$ 0

[1] Total TRUPs includes LOCOM valuation allowance of $29.9 million.

[2] Total TRUPs includes LOCOM valuation allowance of $34.2 million.