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Loans and Allowance for Loan Losses (Details 4) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Financing Receivable, Impaired [Line Items]      
Recorded Investment, With no related allowance recorded $ 1,748 $ 2,114  
Unpaid Principal Balance, With no related allowance recorded 1,959 2,263  
Recorded Investment, With an allowance recorded 7,972 7,030 $ 4,700
Unpaid Principal Balance, With an allowance recorded 8,187 7,228  
Specific Reserves, With an allowance recorded 1,125 1,080 $ 1,600
Total impaired loans, Recorded Investment 9,720 9,144  
Total impaired loans, Unpaid Principal Balance 10,146 9,491  
Commercial, financial, and agricultural      
Financing Receivable, Impaired [Line Items]      
Recorded Investment, With no related allowance recorded 587 564  
Unpaid Principal Balance, With no related allowance recorded 751 706  
Recorded Investment, With an allowance recorded 1,200 1,053  
Unpaid Principal Balance, With an allowance recorded 1,234 1,078  
Specific Reserves, With an allowance recorded 393 469  
Real estate - residential      
Financing Receivable, Impaired [Line Items]      
Recorded Investment, With no related allowance recorded 795 1,550  
Unpaid Principal Balance, With no related allowance recorded 813 1,557  
Recorded Investment, With an allowance recorded 4,992 3,921  
Unpaid Principal Balance, With an allowance recorded 5,062 3,990  
Specific Reserves, With an allowance recorded 450 319  
Real estate - commercial      
Financing Receivable, Impaired [Line Items]      
Recorded Investment, With no related allowance recorded 366    
Unpaid Principal Balance, With no related allowance recorded 395    
Recorded Investment, With an allowance recorded 1,680 1,918  
Unpaid Principal Balance, With an allowance recorded 1,767 1,988  
Specific Reserves, With an allowance recorded 264 277  
Real estate - commercial | Construction      
Financing Receivable, Impaired [Line Items]      
Recorded Investment, With an allowance recorded 48 49  
Unpaid Principal Balance, With an allowance recorded 55 56  
Specific Reserves, With an allowance recorded 7 7  
Installment Loans to Individuals      
Financing Receivable, Impaired [Line Items]      
Recorded Investment, With an allowance recorded 52 89  
Unpaid Principal Balance, With an allowance recorded 69 116  
Specific Reserves, With an allowance recorded $ 11 $ 8