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Loans (Recorded Investment In Nonaccrual Restructured And Loans Past Due 90 Days Or More And Accruing) (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, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment | $ 46,760 | $ 73,609 | $ 46,760 | $ 73,609 | $ 56,564
Nonaccrual loans | 66,654 |  | 66,654 |  | 72,056
Accruing restructured loans | 14,707 |  | 14,707 |  | 20,177
Loans past due 90 days or more and accruing | 2,083 |  | 2,083 |  | 1,845
Total nonperforming loans | 83,444 |  | 83,444 |  | 94,078
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, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment | 16,026 | 29,848 | 16,026 | 29,848 |
Nonaccrual loans | 15,837 |  | 15,837 |  | 16,773
Accruing restructured loans | 264 |  | 264 |  | 1,291
Loans past due 90 days or more and accruing | 16 |  | 16 |  |
Total nonperforming loans | 16,117 |  | 16,117 |  | 18,064
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 |
Construction Real Estate Commercial [Domain] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment | 2,016 | 1,460 | 2,016 | 1,460 |
Nonaccrual loans | 2,016 |  | 2,016 |  | 986
Accruing restructured loans | 0 |  | 0 |  | 338
Loans past due 90 days or more and accruing | 0 |  | 0 |  | 0
Total nonperforming loans | 2,016 |  | 2,016 |  | 1,324
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 - Mortgage [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Nonaccrual loans | 16 |  | 16 |  | 8
Accruing restructured loans | 16 |  | 16 |  | 92
Loans past due 90 days or more and accruing | 0 |  | 0 |  | 0
Total nonperforming loans | 32 |  | 32 |  | 100
Construction Real Estate - Installment [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Nonaccrual loans | 21 |  | 21 |  | 52
Accruing restructured loans | 12 |  | 12 |  | 0
Loans past due 90 days or more and accruing | 0 |  | 0 |  | 0
Total nonperforming loans | 33 |  | 33 |  | 52
Residential Real Estate Commercial [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment | 2,913 | 19,298 | 2,913 | 19,298 |
Nonaccrual loans | 2,786 |  | 2,786 |  | 18,835
Accruing restructured loans | 127 |  | 127 |  | 224
Loans past due 90 days or more and accruing | 0 |  | 0 |  |
Total nonperforming loans | 2,913 |  | 2,913 |  | 19,059
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 - Mortgage [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Nonaccrual loans | 17,411 |  | 17,411 |  | 16,841
Accruing restructured loans | 8,175 |  | 8,175 |  | 10,766
Loans past due 90 days or more and accruing | 720 |  | 720 |  | 568
Total nonperforming loans | 26,306 |  | 26,306 |  | 28,175
Residential Real Estate - HELOC [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Nonaccrual loans | 1,901 |  | 1,901 |  | 1,593
Accruing restructured loans | 1,251 |  | 1,251 |  | 1,025
Loans past due 90 days or more and accruing | 144 |  | 144 |  | 14
Total nonperforming loans | 3,296 |  | 3,296 |  | 2,632
Residential Real Estate - Installment [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Nonaccrual loans | 410 |  | 410 |  | 586
Accruing restructured loans | 1,074 |  | 1,074 |  | 616
Loans past due 90 days or more and accruing | 0 |  | 0 |  | 7
Total nonperforming loans | 1,484 |  | 1,484 |  | 1,209
Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment | 25,805 | 22,995 | 25,805 | 22,995 |
Nonaccrual loans | 22,806 |  | 22,806 |  | 12,979
Accruing restructured loans | 2,999 |  | 2,999 |  | 5,163
Loans past due 90 days or more and accruing | 0 |  | 0 |  |
Total nonperforming loans | 25,805 |  | 25,805 |  | 18,142
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 |
Consumer [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  | 8 |  | 8 |
Nonaccrual loans | 3,450 |  | 3,450 |  | 3,403
Accruing restructured loans | 789 |  | 789 |  | 662
Loans past due 90 days or more and accruing | 1,203 |  | 1,203 |  | 1,256
Total nonperforming loans | $ 5,442 |  | $ 5,442 |  | $ 5,321
Impaired Financing Receivable, Average Recorded Investment |  | $ 8 |  | $ 7 |

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