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Loans (Recorded Investment In Nonaccrual Restructured And Loans Past Due 90 Days Or More And Accruing) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans $ 136,470 $ 155,536
Accruing restructured loans 24,473 29,946
Loans past due 90 days or more and accruing 1,696 3,030
Total nonperforming loans 162,639 188,512
Commercial Financial And Agricultural [Member]
    
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans 16,965 17,324
Accruing restructured loans 2,916 5,277
Loans past due 90 days or more and accruing 0 37
Total nonperforming loans 19,881 22,638
Construction Real Estate - SEPH Commercial Land And Development [Member]
    
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans 6,517 13,939
Accruing restructured loans 0 0
Loans past due 90 days or more and accruing 0 0
Total nonperforming loans 6,517 13,939
Construction Real Estate - Remaining Commercial [Member]
    
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans 13,130 14,977
Accruing restructured loans 2,476 6,597
Loans past due 90 days or more and accruing 0 0
Total nonperforming loans 15,606 21,574
Construction Real Estate - Mortgage [Member]
    
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans 75 158
Accruing restructured loans 98 100
Loans past due 90 days or more and accruing 0 0
Total nonperforming loans 173 258
Construction Real Estate - Installment [Member]
    
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans 39 149
Accruing restructured loans 182 175
Loans past due 90 days or more and accruing 0 0
Total nonperforming loans 221 324
Residential Real Estate - Commercial [Member]
    
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans 33,343 33,961
Accruing restructured loans 1,134 1,661
Loans past due 90 days or more and accruing 0 94
Total nonperforming loans 34,477 35,716
Residential Real Estate - Mortgage [Member]
    
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans 21,607 28,260
Accruing restructured loans 11,434 9,425
Loans past due 90 days or more and accruing 711 950
Total nonperforming loans 33,752 38,635
Residential Real Estate - HELOC [Member]
    
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans 1,863 1,689
Accruing restructured loans 879 736
Loans past due 90 days or more and accruing 0 0
Total nonperforming loans 2,742 2,425
Residential Real Estate - Installment [Member]
    
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans 943 1,670
Accruing restructured loans 989 780
Loans past due 90 days or more and accruing 3 54
Total nonperforming loans 1,935 2,504
Commercial Real Estate [Member]
    
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans 38,405 40,983
Accruing restructured loans 2,604 3,295
Loans past due 90 days or more and accruing 204 1,007
Total nonperforming loans 41,213 45,285
Consumer [Member]
    
Financing Receivable, Recorded Investment [Line Items]    
Nonaccrual loans 3,583 2,426
Accruing restructured loans 1,761 1,900
Loans past due 90 days or more and accruing 778 888
Total nonperforming loans $ 6,122 $ 5,214