Allowance For Loan Losses, Allowance For Losses On Lending-Related Commitments And Impaired Loans (Summary Of Recorded Investment Based On Performance Of Loans By Class, Excluding Covered Loans) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Loans, net of unearned income, excluding covered loans	$ 9,925,077	$ 9,599,886	$ 9,324,163
Commercial Loans [Member] | Commercial and Industrial [Member]
Loans, net of unearned income, excluding covered loans	1,362,662	1,310,753	1,230,502
Commercial Loans [Member] | Commercial and Industrial [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	1,340,373	1,294,353	1,213,947
Commercial Loans [Member] | Commercial and Industrial [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	22,289	16,400	16,555
Commercial Loans [Member] | Franchise [Member]
Loans, net of unearned income, excluding covered loans	114,134	119,488	138,687
Commercial Loans [Member] | Franchise [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	112,342	119,488	138,687
Commercial Loans [Member] | Franchise [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	1,792
Commercial Loans [Member] | Mortgage Warehouse Lines of Credit [Member]
Loans, net of unearned income, excluding covered loans	68,477	131,306	118,823
Commercial Loans [Member] | Mortgage Warehouse Lines of Credit [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	68,477	131,306	118,823
Commercial Loans [Member] | Community Advanatage - Homeowners Association [Member]
Loans, net of unearned income, excluding covered loans	73,929	75,542	62,452
Commercial Loans [Member] | Community Advanatage - Homeowners Association [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	73,929	75,542	62,452
Commercial Loans [Member] | Aircraft [Member]
Loans, net of unearned income, excluding covered loans	21,231	24,618	38,574
Commercial Loans [Member] | Aircraft [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	21,231	24,618	38,574
Commercial Loans [Member] | Asset-Based Lending [Member]
Loans, net of unearned income, excluding covered loans	366,096	288,979	180,486
Commercial Loans [Member] | Asset-Based Lending [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	364,009	288,562	179,267
Commercial Loans [Member] | Asset-Based Lending [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	2,087	417	1,219
Commercial Loans [Member] | Municipal [Member]
Loans, net of unearned income, excluding covered loans	63,296	56,343	35,797
Commercial Loans [Member] | Municipal [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	63,296	56,343	35,797
Commercial Loans [Member] | Leases [Member]
Loans, net of unearned income, excluding covered loans	62,535	41,541	22,295
Commercial Loans [Member] | Leases [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	62,535	41,498	22,229
Commercial Loans [Member] | Leases [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans		43	66
Commercial Loans [Member] | Other [Member]
Loans, net of unearned income, excluding covered loans	76	756	2
Commercial Loans [Member] | Other [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	76	756	2
Commercial Real-Estate Loans [Member] | Residential Construction [Member]
Loans, net of unearned income, excluding covered loans	90,755	95,947	129,462
Commercial Real-Estate Loans [Member] | Residential Construction [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	87,744	85,937	113,994
Commercial Real-Estate Loans [Member] | Residential Construction [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	3,011	10,010	15,468
Commercial Real-Estate Loans [Member] | Commercial Construction [Member]
Loans, net of unearned income, excluding covered loans	137,647	131,672	188,176
Commercial Real-Estate Loans [Member] | Commercial Construction [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	135,194	129,852	182,036
Commercial Real-Estate Loans [Member] | Commercial Construction [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	2,453	1,820	6,140
Commercial Real-Estate Loans [Member] | Land [Member]
Loans, net of unearned income, excluding covered loans	212,934	260,189	269,556
Commercial Real-Estate Loans [Member] | Land [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	178,954	222,587	247,857
Commercial Real-Estate Loans [Member] | Land [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	33,980	37,602	21,699
Commercial Real-Estate Loans [Member] | Office [Member]
Loans, net of unearned income, excluding covered loans	532,382	535,331	535,541
Commercial Real-Estate Loans [Member] | Office [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	514,879	522,613	531,356
Commercial Real-Estate Loans [Member] | Office [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	17,503	12,718	4,185
Commercial Real-Estate Loans [Member] | Industrial [Member]
Loans, net of unearned income, excluding covered loans	514,534	500,301	472,715
Commercial Real-Estate Loans [Member] | Industrial [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	512,064	496,821	467,175
Commercial Real-Estate Loans [Member] | Industrial [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	2,470	3,480	5,540
Commercial Real-Estate Loans [Member] | Retail [Member]
Loans, net of unearned income, excluding covered loans	524,788	510,527	484,537
Commercial Real-Estate Loans [Member] | Retail [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	516,624	507,262	479,363
Commercial Real-Estate Loans [Member] | Retail [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	8,164	3,265	5,174
Commercial Real-Estate Loans [Member] | Multi-Family [Member]
Loans, net of unearned income, excluding covered loans	316,151	290,954	276,881
Commercial Real-Estate Loans [Member] | Multi-Family [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	311,204	286,160	265,807
Commercial Real-Estate Loans [Member] | Multi-Family [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	4,947	4,794	11,074
Commercial Real-Estate Loans [Member] | Mixed Use and Other [Member]
Loans, net of unearned income, excluding covered loans	1,045,477	1,013,086	990,955
Commercial Real-Estate Loans [Member] | Mixed Use and Other [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	1,028,212	992,812	975,003
Commercial Real-Estate Loans [Member] | Mixed Use and Other [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	17,265	20,274	15,952
Commercial Loans [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	2,106,268	2,032,466	1,809,778
Commercial Real-Estate Loans [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	3,284,875	3,244,044	3,262,591
Home Equity [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	864,849	906,987	915,156
Residential Real Estate [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	322,002	347,251	328,237
Commercial Insurance [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	1,414,681	1,248,817	1,329,246
Life Insurance [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	965,935	826,119	588,465
Indirect Consumer [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	57,345	50,638	67,994
Consumer and Other [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	100,311	106,019	99,026
Purchased Life Insurance [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	652,739	695,413	788,269
Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	9,769,005	9,457,754	9,188,762
Commercial Loans [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	26,168	16,860	17,840
Commercial Real-Estate Loans [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	89,793	93,963	85,232
Home Equity [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	15,853	7,425	7,149
Residential Real Estate [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	7,379	6,085	4,436
Commercial Insurance [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	14,755	16,683	17,739
Life Insurance [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	994	180	1,923
Indirect Consumer [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	373	509	1,017
Consumer and Other [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	757	253	65
Purchased Life Insurance [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans		174
Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	156,072	142,132	135,401
Commercial Loans [Member]
Loans, net of unearned income, excluding covered loans	2,132,436	2,049,326	1,827,618
Commercial Real-Estate Loans [Member]
Loans, net of unearned income, excluding covered loans	3,374,668	3,338,007	3,347,823
Home Equity [Member]
Loans, net of unearned income, excluding covered loans	880,702	914,412	922,305
Residential Real Estate [Member]
Loans, net of unearned income, excluding covered loans	329,381	353,336	332,673
Commercial Insurance [Member]
Loans, net of unearned income, excluding covered loans	1,429,436	1,265,500	1,346,985
Life Insurance [Member]
Loans, net of unearned income, excluding covered loans	966,929	826,299	590,388
Purchased Life Insurance [Member]
Loans, net of unearned income, excluding covered loans	652,739	695,587	788,269
Indirect Consumer [Member]
Loans, net of unearned income, excluding covered loans	57,718	51,147	69,011
Consumer and Other [Member]
Loans, net of unearned income, excluding covered loans	$ 101,068	$ 106,272	$ 99,091