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Loans (Loans Individually Evaluated For Impairment By Class Of Loans) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance $ 82,224   $ 82,224   $ 95,358
Recorded investment 73,144 $ 90,844 73,144 $ 90,844 70,426
Allowance for loan losses allocated 4,145   4,145   548
Impaired Financing Receivable, Average Recorded Investment 67,672 81,825 67,479 80,544  
Impaired Financing Receivable, Interest Income, Cash Basis Method 437 848 1,248 3,244  
Commercial Financial And Agricultural [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 28,475 29,779 28,475 29,779  
Impaired Financing Receivable, Average Recorded Investment 23,320 28,600 21,789 29,319  
Impaired Financing Receivable, Interest Income, Cash Basis Method 120 308 340 546  
Commercial Financial And Agricultural [Member] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 17,871   17,871   41,075
Recorded investment 12,837   12,837   19,965
Allowance for loan losses allocated 0   0   0
Commercial Financial And Agricultural [Member] | Financing Receivable With A Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 17,505   17,505   810
Recorded investment 15,638   15,638   659
Allowance for loan losses allocated 3,774   3,774   152
Construction Real Estate Commercial [Domain]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 1,636 6,086 1,636 6,086  
Impaired Financing Receivable, Average Recorded Investment 1,843 6,395 1,960 6,564  
Impaired Financing Receivable, Interest Income, Cash Basis Method 16 15 31 28  
Construction Real Estate Commercial [Domain] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 1,457   1,457   3,662
Recorded investment 1,431   1,431   2,226
Allowance for loan losses allocated 0   0   0
Construction Real Estate Commercial [Domain] | Financing Receivable With A Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 1,592   1,592    
Recorded investment 205   205    
Allowance for loan losses allocated 44   44    
Residential Real Estate - Commercial [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 21,235 25,070 21,235 25,070  
Impaired Financing Receivable, Average Recorded Investment 20,732 24,648 21,220 24,795  
Impaired Financing Receivable, Interest Income, Cash Basis Method 61 340 406 2,305  
Residential Real Estate - Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 21,261   21,261   24,409
Recorded investment 20,873   20,873   22,687
Allowance for loan losses allocated 0   0   0
Residential Real Estate - Commercial [Member] | Financing Receivable With A Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 362   362   427
Recorded investment 362   362   415
Allowance for loan losses allocated 29   29   87
Commercial Real Estate [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 21,790 29,889 21,790 29,889  
Impaired Financing Receivable, Average Recorded Investment 21,768 22,177 22,504 19,863  
Impaired Financing Receivable, Interest Income, Cash Basis Method 240 185 471 365  
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 20,199   20,199   23,961
Recorded investment 20,014   20,014   23,474
Allowance for loan losses allocated 0   0   0
Commercial Real Estate [Member] | Financing Receivable With A Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 1,969   1,969   1,014
Recorded investment 1,776   1,776   1,000
Allowance for loan losses allocated 290   290   $ 309
Consumer [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 8 20 8 20  
Impaired Financing Receivable, Average Recorded Investment 9 $ 5 6 $ 3  
Consumer [Member] | Financing Receivable With A Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 8   8    
Recorded investment 8   8    
Allowance for loan losses allocated $ 8   $ 8