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Loans - TDR Number of Contracts Modified And Recorded Investment (Details) | 12 Months Ended
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Dec. 31, 2016 USD ($) contracts | Dec. 31, 2015 USD ($) contracts | Dec. 31, 2014 USD ($) contracts
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 97 | 67 | 86
Recorded Investment | $ 3,798,000 | $ 2,854,000 | $ 2,009,000
Number of Contracts | contracts | 405 | 424 | 450
Total Recorded Investment Modified as TDRs During Period | $ 21,258,000 | $ 23,324,000 | $ 8,395,000
Leases |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 0 | 0 | 0
Recorded Investment | $ 0 |  |
Commercial, financial and agricultural |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 7 | 1 | 4
Recorded Investment | $ 419,000 | $ 1,000 | $ 206,000
Number of Contracts | contracts | 32 | 39 | 30
Total Recorded Investment Modified as TDRs During Period | $ 8,641,000 | $ 12,588,000 | $ 723,000
Commercial real estate |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 5 | 1 | 1
Recorded Investment | $ 843,000 | $ 626,000 | $ 302,000
Number of Contracts | contracts | 14 | 14 | 11
Total Recorded Investment Modified as TDRs During Period | $ 6,381,000 | $ 4,160,000 | $ 2,438,000
SEPH commercial land and development |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 0 |  |
SEPH commercial land and development |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 0 | 0 | 0
Number of Contracts | contracts |  | 0 | 0
Remaining commercial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 0 | 0 | 0
Number of Contracts | contracts | 2 | 2 | 2
Total Recorded Investment Modified as TDRs During Period | $ 1,143,000 | $ 513,000 | $ 206,000
Mortgage |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 0 | 0 | 0
Recorded Investment | $ 0 |  |
Number of Contracts | contracts | 0 | 1 | 0
Total Recorded Investment Modified as TDRs During Period |  | $ 19,000 |
Installment |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 0 | 0 | 0
Recorded Investment | $ 0 |  |
Number of Contracts | contracts | 1 | 0 | 2
Total Recorded Investment Modified as TDRs During Period |  |  | $ 56,000
Commercial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 7 | 3 | 1
Recorded Investment | $ 848,000 | $ 1,005,000 | $ 3,000
Number of Contracts | contracts | 11 | 11 | 9
Total Recorded Investment Modified as TDRs During Period | $ 1,122,000 | $ 1,185,000 | $ 866,000
Mortgage |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 15 | 12 | 14
Recorded Investment | $ 1,201,000 | $ 682,000 | $ 810,000
Number of Contracts | contracts | 34 | 39 | 46
Total Recorded Investment Modified as TDRs During Period | $ 2,406,000 | $ 3,254,000 | $ 2,357,000
HELOC |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 0 | 1 | 2
Recorded Investment |  | $ 5,000 | $ 160,000
Number of Contracts | contracts | 13 | 26 | 10
Total Recorded Investment Modified as TDRs During Period | $ 282,000 | $ 360,000 | $ 326,000
Installment |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 1 | 2 | 2
Recorded Investment | $ 3,000 | $ 101,000 | $ 12,000
Number of Contracts | contracts | 5 | 9 | 10
Total Recorded Investment Modified as TDRs During Period | $ 105,000 | $ 155,000 | $ 121,000
Consumer |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | contracts | 293 | 283 | 330
Total Recorded Investment Modified as TDRs During Period | $ 1,178,000 | $ 1,090,000 | $ 1,302,000
Accruing |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Recorded Investment | 111,000 | 44,000 | 314,000
Total Recorded Investment Modified as TDRs During Period | 4,628,000 | 11,766,000 | 1,946,000
Accruing | Commercial, financial and agricultural |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 191,000 | 8,948,000 | 292,000
Accruing | Commercial real estate |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 3,844,000 | 637,000 | 1,184,000
Accruing | Remaining commercial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period |  | 513,000 |
Accruing | Mortgage |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 0 | 19,000 | 0
Accruing | Installment |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 0 | 0 | 0
Accruing | Commercial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 89,000 |  |
Accruing | Mortgage |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 114,000 | 1,132,000 | 32,000
Accruing | HELOC |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 104,000 | 315,000 | 85,000
Accruing | Installment |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 102,000 |  | 109,000
Accruing | Consumer |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 184,000 | 202,000 | 244,000
Nonaccrual |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Recorded Investment | 3,700,000 | 2,800,000 | 1,700,000
Total Recorded Investment Modified as TDRs During Period | 16,630,000 | 11,558,000 | 6,449,000
Nonaccrual | Commercial, financial and agricultural |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 8,450,000 | 3,640,000 | 431,000
Nonaccrual | Commercial real estate |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 2,537,000 | 3,523,000 | 1,254,000
Nonaccrual | Remaining commercial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 1,143,000 |  | 206,000
Nonaccrual | Installment |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period |  |  | 56,000
Nonaccrual | Commercial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 1,033,000 | 1,185,000 | 866,000
Nonaccrual | Mortgage |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 2,292,000 | 2,122,000 | 2,325,000
Nonaccrual | HELOC |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 178,000 | 45,000 | 241,000
Nonaccrual | Installment |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | 3,000 | 155,000 | 12,000
Nonaccrual | Consumer |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Recorded Investment Modified as TDRs During Period | $ 994,000 | $ 888,000 | $ 1,058,000

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