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Loans and Asset Quality Information (Schedule of Information of Loans Modified in Troubled Debt Restructuring) (Details) - All Total Loans [Member] $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) N | Dec. 31, 2017 USD ($) N
Information related to loans modified in a troubled debt restructuring: |  |
Number of contracts, TDRs | 6 | 10
TDRs arising during period Pre-Modification | $ 655 | $ 4,452
TDRs arising during period Post-Modification | $ 684 | $ 4,414
Commercial, financial, and agricultural [Member] |  |
Information related to loans modified in a troubled debt restructuring: |  |
Number of contracts, TDRs Accruing | N |  |
TDRs arising during period - Accruing Pre-Modification |  |
TDRs arising during period - Accruing Post-Modification |  |
Number of contracts, TDRs Nonaccrual | N |  | 1
TDRs arising during period - Nonaccrual Pre-Modification |  | $ 38
TDRs arising during period - Nonaccrual Post-Modification |  | $ 25
Real estate - construction, land development & other land loans [Member] |  |
Information related to loans modified in a troubled debt restructuring: |  |
Number of contracts, TDRs Accruing | N |  |
TDRs arising during period - Accruing Pre-Modification |  |
TDRs arising during period - Accruing Post-Modification |  |
Number of contracts, TDRs Nonaccrual | N | 1 | 1
TDRs arising during period - Nonaccrual Pre-Modification | $ 61 | $ 32
TDRs arising during period - Nonaccrual Post-Modification | $ 61 | $ 32
Real estate - mortgage - residential (1-4 family) first mortgages [Member] |  |
Information related to loans modified in a troubled debt restructuring: |  |
Number of contracts, TDRs Accruing | N | 2 |
TDRs arising during period - Accruing Pre-Modification | $ 254 |
TDRs arising during period - Accruing Post-Modification | $ 273 |
Number of contracts, TDRs Nonaccrual | N | 3 | 2
TDRs arising during period - Nonaccrual Pre-Modification | $ 340 | $ 262
TDRs arising during period - Nonaccrual Post-Modification | $ 350 | $ 262
Real estate - mortgage - home equity loans / lines of credit [Member] |  |
Information related to loans modified in a troubled debt restructuring: |  |
Number of contracts, TDRs Accruing | N |  |
TDRs arising during period - Accruing Pre-Modification |  |
TDRs arising during period - Accruing Post-Modification |  |
Number of contracts, TDRs Nonaccrual | N |  |
TDRs arising during period - Nonaccrual Pre-Modification |  |
TDRs arising during period - Nonaccrual Post-Modification |  |
Real estate - mortgage - commercial and other [Member] |  |
Information related to loans modified in a troubled debt restructuring: |  |
Number of contracts, TDRs Accruing | N |  | 6
TDRs arising during period - Accruing Pre-Modification |  | $ 4,120
TDRs arising during period - Accruing Post-Modification |  | $ 4,095
Number of contracts, TDRs Nonaccrual | N |  |
TDRs arising during period - Nonaccrual Pre-Modification |  |
TDRs arising during period - Nonaccrual Post-Modification |  |
Installment loans to individuals [Member] |  |
Information related to loans modified in a troubled debt restructuring: |  |
Number of contracts, TDRs Accruing | N |  |
TDRs arising during period - Accruing Pre-Modification |  |
TDRs arising during period - Accruing Post-Modification |  |
Number of contracts, TDRs Nonaccrual | N |  |
TDRs arising during period - Nonaccrual Pre-Modification |  |
TDRs arising during period - Nonaccrual Post-Modification |  |

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