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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, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance $ 83,496   $ 83,496   $ 95,358
Recorded investment 73,609 $ 77,998 73,609 $ 77,998 70,426
Allowance for loan losses allocated 5,102   5,102   548
Impaired Financing Receivable, Average Recorded Investment 72,580 84,736 68,953 81,191  
Impaired Financing Receivable, Interest Income, Cash Basis Method 654 767 1,902 4,011  
Commercial Financial And Agricultural [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 29,848 23,856 29,848 23,856  
Impaired Financing Receivable, Average Recorded Investment 28,412 26,679 23,770 28,217  
Impaired Financing Receivable, Interest Income, Cash Basis Method 398 194 738 740  
Commercial Financial And Agricultural [Member] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 22,233   22,233   41,075
Recorded investment 16,980   16,980   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 14,735   14,735   810
Recorded investment 12,868   12,868   659
Allowance for loan losses allocated 4,761   4,761   152
Construction Real Estate Commercial [Domain]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 1,460 4,377 1,460 4,377  
Impaired Financing Receivable, Average Recorded Investment 1,554 5,643 1,830 6,244  
Impaired Financing Receivable, Interest Income, Cash Basis Method 18 16 49 44  
Construction Real Estate Commercial [Domain] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 2,923   2,923   3,662
Recorded investment 1,460   1,460   2,226
Allowance for loan losses allocated 0   0   0
Residential Real Estate - Commercial [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 19,298 23,700 19,298 23,700  
Impaired Financing Receivable, Average Recorded Investment 20,365 24,422 20,876 24,618  
Impaired Financing Receivable, Interest Income, Cash Basis Method 46 314 452 2,619  
Residential Real Estate - Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 19,393   19,393   24,409
Recorded investment 19,009   19,009   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 289   289   427
Recorded investment 289   289   415
Allowance for loan losses allocated 13   13   87
Commercial Real Estate [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 22,995 26,065 22,995 26,065  
Impaired Financing Receivable, Average Recorded Investment 22,241 27,982 22,470 22,108  
Impaired Financing Receivable, Interest Income, Cash Basis Method 192 243 663 608  
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid principal balance 18,558   18,558   23,961
Recorded investment 18,158   18,158   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 5,357   5,357   1,014
Recorded investment 4,837   4,837   1,000
Allowance for loan losses allocated 320   320   $ 309
Consumer [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded investment 8   8    
Impaired Financing Receivable, Average Recorded Investment 8 $ 10 7 $ 4  
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