Loans And Allowance For Loan Losses (Summary Of Commercial Loans By Credit Quality) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	$ 4,226,312	$ 3,970,214
Commercial Real Estate [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	2,521,571	2,341,646
Commercial Real Estate - FL [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	135,547	154,081
Commercial And Industrial [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	1,451,144	1,363,692
Commercial Leases [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	118,050	110,795
Pass [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	3,818,004	3,578,997
Pass [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	2,278,693	2,127,334
Pass [Member] | Commercial Real Estate - FL [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	69,723	70,802
Pass [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	1,353,573	1,275,230
Pass [Member] | Commercial Leases [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	116,015	105,631
Special Mention [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	146,667	142,347
Special Mention [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	81,587	73,701
Special Mention [Member] | Commercial Real Estate - FL [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	12,921	16,002
Special Mention [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	52,008	49,282
Special Mention [Member] | Commercial Leases [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	151	3,362
Substandard [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	251,316	246,828
Substandard [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	152,581	139,578
Substandard [Member] | Commercial Real Estate - FL [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	52,903	67,277
Substandard [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	43,948	38,171
Substandard [Member] | Commercial Leases [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	1,884	1,802
Doubtful [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	10,325	2,042
Doubtful [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	8,710	1,033
Doubtful [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	$ 1,615	$ 1,009