Loans And Allowance For Loan Losses (Summary Of Loans, Net Of Unearned Income) (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
Loans, net of unearned income	7,802,792	6,856,667
Commercial Real Estate [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Total commercial loans and leases	2,521,571	2,341,646
Loans, net of unearned income	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
Loans, net of unearned income	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
Loans, net of unearned income	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
Loans, net of unearned income	118,050	110,795
Direct Installment [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Loans, net of unearned income	1,082,964	1,029,187
Residential Mortgages [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Loans, net of unearned income	1,187,448	670,936
Indirect Installment [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Loans, net of unearned income	563,929	540,789
Consumer Lines Of Credit [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Loans, net of unearned income	704,773	607,280
Other [Member]
Accounts, Notes, Loans And Financing Receivable [Line Items]
Loans, net of unearned income	$ 37,366	$ 38,261