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Loans (Aging Of Recorded Investment In Past Due Loans) (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, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | $ 26,729 |  |  | $ 26,729 |  |  | $ 25,241 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 29,158 | [1] |  | 29,158 | [1] |  | 17,776 | [2]
Total loans past due |  | 55,887 |  |  | 55,887 |  |  | 43,017 |
Total current |  | 5,285,668 |  |  | 5,285,668 |  |  | 5,346,125 |
Recorded Investment |  | 5,341,555 |  |  | 5,341,555 |  |  | 5,389,142 |
Loans past due 90 days or more and accruing |  | 1,478 |  |  | 1,478 |  |  | 1,845 |
Impaired Financing Receivable, Recorded Investment, Nonaccrual loans which are current in regards to contractual P&I payments |  | 53,400 |  |  | 53,400 |  |  | 56,100 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 2,374 |  | $ 3,036 | 3,767 |  | $ 7,569 |  |
Construction Real Estate Commercial [Domain] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 41 |  |  | 41 |  |  | 29 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | [1] | 1,821 |  |  | 1,821 |  |  |  |
Total loans past due |  | 1,862 |  |  | 1,862 |  |  | 29 |
Total current |  | 134,619 |  |  | 134,619 |  |  | 125,761 |
Recorded Investment |  | 136,481 |  |  | 136,481 |  |  | 125,790 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  | 0 |
Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 3,556 |  |  | 3,556 |  |  | 145 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 12,913 | [1] |  | 12,913 | [1] |  | 1,043 | [2]
Total loans past due |  | 16,469 |  |  | 16,469 |  |  | 1,188 |
Total current |  | 1,002,920 |  |  | 1,002,920 |  |  | 1,056,678 |
Loans past due 90 days or more and accruing |  | 6 |  |  | 6 |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 149 |  | 164 | 193 |  | 3,052 |  |
Construction Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 506 |  |  | 506 |  |  | 256 |
Total loans past due |  | 506 |  |  | 506 |  |  | 256 |
Total current |  | 52,516 |  |  | 52,516 |  |  | 52,080 |
Recorded Investment |  | 53,022 |  |  | 53,022 |  |  | 52,336 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  | 0 |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  | 8 |  |  | 8 |  |
Construction Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 39 |  |  | 39 |  |  | 54 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 17 | [1] |  | 17 | [1] |  | 19 | [2]
Total loans past due |  | 56 |  |  | 56 |  |  | 73 |
Total current |  | 2,918 |  |  | 2,918 |  |  | 3,818 |
Recorded Investment |  | 2,974 |  |  | 2,974 |  |  | 3,891 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  | 0 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 14 |  |  | 14 |  |  |  |
Residential Real Estate - Commercial [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  |  |  |  |  |  |  | 16 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 1,112 | [1] |  | 1,112 | [1] |  | 1,586 | [2]
Total loans past due |  | 1,112 |  |  | 1,112 |  |  | 1,602 |
Total current |  | 390,608 |  |  | 390,608 |  |  | 392,521 |
Recorded Investment |  | 391,720 |  |  | 391,720 |  |  | 394,123 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  | 282 |  |  | 282 |  |
Residential Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 12,214 |  |  | 12,214 |  |  | 11,515 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 8,169 | [1] |  | 8,169 | [1] |  | 9,232 | [2]
Total loans past due |  | 20,383 |  |  | 20,383 |  |  | 20,747 |
Total current |  | 1,075,632 |  |  | 1,075,632 |  |  | 1,091,195 |
Recorded Investment |  | 1,096,015 |  |  | 1,096,015 |  |  | 1,111,942 |
Loans past due 90 days or more and accruing |  | 399 |  |  | 399 |  |  | 568 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 317 |  | 944 | 961 |  | 1,548 |  |
Residential Real Estate - HELOC [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 500 |  |  | 500 |  |  | 616 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 768 | [1] |  | 768 | [1] |  | 876 | [2]
Total loans past due |  | 1,268 |  |  | 1,268 |  |  | 1,492 |
Total current |  | 188,316 |  |  | 188,316 |  |  | 202,660 |
Recorded Investment |  | 189,584 |  |  | 189,584 |  |  | 204,152 |
Loans past due 90 days or more and accruing |  | 60 |  |  | 60 |  |  | 14 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 452 |  | 208 | 791 |  | 406 |  |
Residential Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 190 |  |  | 190 |  |  | 239 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 322 | [1] |  | 322 | [1] |  | 253 | [2]
Total loans past due |  | 512 |  |  | 512 |  |  | 492 |
Total current |  | 16,136 |  |  | 16,136 |  |  | 18,087 |
Recorded Investment |  | 16,648 |  |  | 16,648 |  |  | 18,579 |
Loans past due 90 days or more and accruing |  | 103 |  |  | 103 |  |  | 7 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 75 |  | 40 | 121 |  | 73 |  |
Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Recorded Investment | [3] | 1,019,389 |  |  | 1,019,389 |  |  | 1,057,866 |
Commercial Real Estate [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 156 |  |  | 156 |  |  | 856 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 2,104 | [1] |  | 2,104 | [1] |  | 2,360 | [2]
Total loans past due |  | 2,260 |  |  | 2,260 |  |  | 3,216 |
Total current |  | 1,152,826 |  |  | 1,152,826 |  |  | 1,168,674 |
Recorded Investment | [3] | 1,155,086 |  |  | 1,155,086 |  |  | 1,171,890 |
Loans past due 90 days or more and accruing |  | 0 |  |  | 0 |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 589 |  | 802 | 720 |  | 1,183 |  |
Consumer [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 9,527 |  |  | 9,527 |  |  | 11,515 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 1,932 | [1] |  | 1,932 | [1] |  | 2,407 | [2]
Total loans past due |  | 11,459 |  |  | 11,459 |  |  | 13,922 |
Total current |  | 1,266,487 |  |  | 1,266,487 |  |  | 1,231,622 |
Recorded Investment |  | 1,277,946 |  |  | 1,277,946 |  |  | 1,245,544 |
Loans past due 90 days or more and accruing |  | 910 |  |  | 910 |  |  | 1,256 |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 778 |  | 588 | 967 |  | 1,017 |  |
Leases [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Accruing loans past due 30-89 days |  | 0 |  |  | 0 |  |  | 0 |
Past due nonaccrual loans and loans past due 90 days or more and accruing |  | 0 | [1] |  | 0 | [1] |  | 0 | [2]
Total loans past due |  | 0 |  |  | 0 |  |  | 0 |
Total current |  | 2,690 |  |  | 2,690 |  |  | 3,029 |
Recorded Investment |  | 2,690 |  |  | 2,690 |  |  | $ 3,029 |
Accruing Financing Receivable Modifications [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 1,223 |  | 1,477 | 1,511 |  | 1,725 |  |
Accruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 123 |  |  | 123 |  |  |  |
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 0 |  | 0 | 0 |  | 0 |  |
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 14 |  | 0 | 14 |  | 0 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 93 |  | 438 | 93 |  | 438 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 409 |  | 160 | 661 |  | 359 |  |
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 71 |  | 40 | 104 |  | 73 |  |
Accruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 455 |  | 802 | 455 |  | 803 |  |
Accruing Financing Receivable Modifications [Member] | Consumer [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 58 |  | 37 | 61 |  | 52 |  |
Nonaccruing Financing Receivable Modifications [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 1,151 |  | 1,559 | 2,256 |  | 5,844 |  |
Nonaccruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 26 |  | 164 | 70 |  | 3,052 |  |
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  | 8 |  |  | 8 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Commercial [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  |  |  | 282 |  |  | 282 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 224 |  | 506 | 868 |  | 1,110 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 43 |  | 48 | 130 |  | 47 |  |
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 4 |  |  | 17 |  |  |  |
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | 134 |  |  | 265 |  | 380 |  |
Nonaccruing Financing Receivable Modifications [Member] | Consumer [Member] |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period |  | $ 720 |  | $ 551 | $ 906 |  | $ 965 |  |
[1] | 1) Includes $1.5 million of loans past due 90 days or more and accruing. The remaining loans were past due nonaccrual loans.(2) Includes $53.4 million of nonaccrual loans which were current in regards to contractual principal and interest payments
[2] | 1) Includes $1.8 million of loans past due 90 days or more and accruing. The remaining loans were past due nonaccrual loans.(2) Includes $56.1 million of nonaccrual loans which were current in regards to contractual principal and interest payments.
[3] | Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class.

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