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Loans and Asset Quality Information (Schedule of Accruing Restructured Loans Defaulted in Period) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($)
All Total Loans [Member] |  |  |  |
Accruing TDRs that subsequently defaulted |  |  |  |
Number of Contracts - Subsequently defaulted |  |  | 2 | 2
Recorded Investment - Subsequently defaulted |  |  | $ 880 | $ 65
All Total Loans [Member] | Commercial, financial, and agricultural [Member] |  |  |  |
Accruing TDRs that subsequently defaulted |  |  |  |
Number of Contracts - Subsequently defaulted |  |  |  | 1
Recorded Investment - Subsequently defaulted |  |  |  | $ 44
All Total Loans [Member] | Real estate - mortgage - residential (1-4 family) first mortgages [Member] |  |  |  |
Accruing TDRs that subsequently defaulted |  |  |  |
Number of Contracts - Subsequently defaulted |  |  | 2 |
Recorded Investment - Subsequently defaulted |  |  | $ 880 |
All Total Loans [Member] | Real estate - mortgage - commercial and other [Member] |  |  |  |
Accruing TDRs that subsequently defaulted |  |  |  |
Number of Contracts - Subsequently defaulted |  |  |  | 1
Recorded Investment - Subsequently defaulted |  |  |  | $ 21
Covered [Member] |  |  |  |
Accruing TDRs that subsequently defaulted |  |  |  |
Number of Contracts - Subsequently defaulted |  |  |  | 1
Recorded Investment - Subsequently defaulted |  |  |  | $ 44

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