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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 | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment | $ 61,750 | $ 73,144 | $ 61,750 | $ 73,144 | $ 56,564
Nonaccrual loans | 81,124 |  | 81,124 |  | 72,056
Accruing restructured loans | 16,400 |  | 16,400 |  | 20,177
Loans past due 90 days or more and accruing | 1,478 |  | 1,478 |  | 1,845
Total nonperforming loans | 99,002 |  | 99,002 |  | 94,078
Impaired Financing Receivable, Average Recorded Investment | 52,511 | 67,672 | 51,883 | 67,479 |
Impaired Financing Receivable, Interest Income, Cash Basis Method | 386 | 437 | 807 | 1,248 |
Commercial Financial And Agricultural [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment | 29,943 | 28,475 | 29,943 | 28,475 |
Nonaccrual loans | 29,847 |  | 29,847 |  | 16,773
Accruing restructured loans | 187 |  | 187 |  | 1,291
Loans past due 90 days or more and accruing | 6 |  | 6 |  |
Total nonperforming loans | 30,040 |  | 30,040 |  | 18,064
Impaired Financing Receivable, Average Recorded Investment | 27,637 | 23,320 | 23,402 | 21,789 |
Impaired Financing Receivable, Interest Income, Cash Basis Method | 145 | 120 | 319 | 340 |
Construction Real Estate Commercial [Domain] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment | 2,529 | 1,636 | 2,529 | 1,636 |
Nonaccrual loans | 2,187 |  | 2,187 |  | 986
Accruing restructured loans | 342 |  | 342 |  | 338
Loans past due 90 days or more and accruing | 0 |  | 0 |  | 0
Total nonperforming loans | 2,529 |  | 2,529 |  | 1,324
Impaired Financing Receivable, Average Recorded Investment | 1,510 | 1,843 | 1,451 | 1,960 |
Impaired Financing Receivable, Interest Income, Cash Basis Method | 13 | 16 | 27 | 31 |
Construction Real Estate - Mortgage [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Nonaccrual loans | 0 |  | 0 |  | 8
Accruing restructured loans | 16 |  | 16 |  | 92
Loans past due 90 days or more and accruing | 0 |  | 0 |  | 0
Total nonperforming loans | 16 |  | 16 |  | 100
Construction Real Estate - Installment [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Nonaccrual loans | 42 |  | 42 |  | 52
Accruing restructured loans | 15 |  | 15 |  | 0
Loans past due 90 days or more and accruing | 0 |  | 0 |  | 0
Total nonperforming loans | 57 |  | 57 |  | 52
Residential Real Estate - Commercial [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment | 2,750 | 21,235 | 2,750 | 21,235 |
Nonaccrual loans | 2,531 |  | 2,531 |  | 18,835
Accruing restructured loans | 219 |  | 219 |  | 224
Loans past due 90 days or more and accruing | 0 |  | 0 |  |
Total nonperforming loans | 2,750 |  | 2,750 |  | 19,059
Impaired Financing Receivable, Average Recorded Investment | 2,653 | 20,732 | 7,511 | 21,220 |
Impaired Financing Receivable, Interest Income, Cash Basis Method | 27 | 61 | 58 | 406 |
Residential Real Estate - Mortgage [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Nonaccrual loans | 17,508 |  | 17,508 |  | 16,841
Accruing restructured loans | 9,644 |  | 9,644 |  | 10,766
Loans past due 90 days or more and accruing | 399 |  | 399 |  | 568
Total nonperforming loans | 27,551 |  | 27,551 |  | 28,175
Residential Real Estate - HELOC [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Nonaccrual loans | 1,772 |  | 1,772 |  | 1,593
Accruing restructured loans | 1,230 |  | 1,230 |  | 1,025
Loans past due 90 days or more and accruing | 60 |  | 60 |  | 14
Total nonperforming loans | 3,062 |  | 3,062 |  | 2,632
Residential Real Estate - Installment [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Nonaccrual loans | 464 |  | 464 |  | 586
Accruing restructured loans | 808 |  | 808 |  | 616
Loans past due 90 days or more and accruing | 103 |  | 103 |  | 7
Total nonperforming loans | 1,375 |  | 1,375 |  | 1,209
Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment | 26,528 | 21,790 | 26,528 | 21,790 |
Nonaccrual loans | 23,313 |  | 23,313 |  | 12,979
Accruing restructured loans | 3,215 |  | 3,215 |  | 5,163
Loans past due 90 days or more and accruing | 0 |  | 0 |  |
Total nonperforming loans | 26,528 |  | 26,528 |  | 18,142
Impaired Financing Receivable, Average Recorded Investment | 20,711 | 21,768 | 19,519 | 22,504 |
Impaired Financing Receivable, Interest Income, Cash Basis Method | 201 | 240 | 403 | 471 |
Consumer [Member] |  |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  | 8 |  | 8 |
Nonaccrual loans | 3,460 |  | 3,460 |  | 3,403
Accruing restructured loans | 724 |  | 724 |  | 662
Loans past due 90 days or more and accruing | 910 |  | 910 |  | 1,256
Total nonperforming loans | $ 5,094 |  | $ 5,094 |  | $ 5,321
Impaired Financing Receivable, Average Recorded Investment |  | $ 9 |  | $ 6 |

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