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Loans And Allowance For Loan Losses (Summary Of Changes In The Allowance For Loan Losses By Class) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period $ 100,662 $ 106,120
Charge-Offs (6,026) (7,333)
Recoveries 885 597
Net Charge-Offs (5,141) (6,736)
Provision for Loan Losses 6,572 8,228
Balance at End of Period 102,093 107,612
Commercial Real Estate [Member]
    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period 30,337 32,439
Charge-Offs (1,357) (1,181)
Recoveries 150 82
Net Charge-Offs (1,207) (1,099)
Provision for Loan Losses 2,312 3,003
Balance at End of Period 31,442 34,343
Commercial Real Estate - FL [Member]
    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period 12,946 17,485
Charge-Offs   (1,147)
Recoveries 9  
Net Charge-Offs 9 (1,147)
Provision for Loan Losses   1,599
Balance at End of Period 12,955 17,937
Commercial And Industrial [Member]
    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period 25,476 24,682
Charge-Offs (1,080) (961)
Recoveries 109 58
Net Charge-Offs (971) (903)
Provision for Loan Losses 2,369 349
Balance at End of Period 26,874 24,128
Commercial Leases [Member]
    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period 1,556 1,070
Charge-Offs (135) (85)
Recoveries 66 17
Net Charge-Offs (69) (68)
Provision for Loan Losses 182 252
Balance at End of Period 1,669 1,254
Total Commercial Loans And Leases [Member]
    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period 70,315 75,676
Charge-Offs (2,572) (3,374)
Recoveries 334 157
Net Charge-Offs (2,238) (3,217)
Provision for Loan Losses 4,863 5,203
Balance at End of Period 72,940 77,662
Direct Installment [Member]
    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period 14,814 14,941
Charge-Offs (2,124) (2,228)
Recoveries 267 229
Net Charge-Offs (1,857) (1,999)
Provision for Loan Losses 793 1,825
Balance at End of Period 13,750 14,767
Residential Mortgages [Member]
    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period 4,437 4,578
Charge-Offs (147) (238)
Recoveries 77 8
Net Charge-Offs (70) (230)
Provision for Loan Losses 132 166
Balance at End of Period 4,499 4,514
Indirect Installment [Member]
    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period 5,503 5,941
Charge-Offs (725) (933)
Recoveries 132 138
Net Charge-Offs (593) (795)
Provision for Loan Losses 475 615
Balance at End of Period 5,385 5,761
Consumer Lines Of Credit [Member]
    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period 5,447 4,743
Charge-Offs (299) (396)
Recoveries 75 43
Net Charge-Offs (224) (353)
Provision for Loan Losses 138 222
Balance at End of Period 5,361 4,612
Other [Member]
    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period 146 241
Charge-Offs (159) (164)
Recoveries   22
Net Charge-Offs (159) (142)
Provision for Loan Losses 171 197
Balance at End of Period 158 296
Purchased Credit-Impaired Loans [Member]
    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Balance at Beginning of Period     
Charge-Offs     
Recoveries     
Net Charge-Offs     
Provision for Loan Losses     
Balance at End of Period