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Loans (Loans Individually Evaluated For Impairment By Class Of Loans) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance $ 57,767   $ 57,767   $ 66,585
Recorded investment 46,760 $ 73,609 46,760 $ 73,609 56,564
Allowance for loan losses allocated 1,846   1,846   684
Impaired Financing Receivable, Average Recorded Investment 54,679 72,580 52,015 68,953  
Impaired Financing Receivable, Interest Income, Cash Basis Method 485 654 1,292 1,902  
Commercial Financial And Agricultural [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 16,026 29,848 16,026 29,848  
Impaired Financing Receivable, Average Recorded Investment 23,247 28,412 22,686 23,770  
Impaired Financing Receivable, Interest Income, Cash Basis Method 187 398 506 738  
Commercial Financial And Agricultural [Member] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 18,067   18,067   19,899
Recorded investment 12,801   12,801   14,704
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 5,317   5,317   5,394
Recorded investment 3,225   3,225   3,335
Allowance for loan losses allocated 1,716   1,716   681
Construction Real Estate Commercial [Domain]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 2,016 1,460 2,016 1,460  
Impaired Financing Receivable, Average Recorded Investment 2,246 1,554 1,661 1,830  
Impaired Financing Receivable, Interest Income, Cash Basis Method 4 18 31 49  
Construction Real Estate Commercial [Domain] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 4,829   4,829   2,788
Recorded investment 2,016   2,016   1,324
Allowance for loan losses allocated 0   0   0
Residential Real Estate Commercial [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 2,913 19,298 2,913 19,298  
Impaired Financing Receivable, Average Recorded Investment 2,758 20,365 6,086 20,876  
Impaired Financing Receivable, Interest Income, Cash Basis Method 26 46 84 452  
Residential Real Estate Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 3,004   3,004   19,346
Recorded investment 2,716   2,716   19,012
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 200   200   47
Recorded investment 197   197   47
Allowance for loan losses allocated 59   59   1
Commercial Real Estate [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 25,805 22,995 25,805 22,995  
Impaired Financing Receivable, Average Recorded Investment 26,428 22,241 21,582 22,470  
Impaired Financing Receivable, Interest Income, Cash Basis Method 268 192 671 663  
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 24,518   24,518   18,974
Recorded investment 24,004   24,004   18,060
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 1,832   1,832   137
Recorded investment 1,801   1,801   82
Allowance for loan losses allocated $ 71   $ 71   $ 2
Consumer [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment   8   8  
Impaired Financing Receivable, Average Recorded Investment   $ 8   $ 7