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Loans (Details 3) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Financing Receivable, Past Due [Line Items]          
Impaired Financing Receivable, Related Allowance $ 1 $ 1 $ 1
Impaired Financing Receivable, Recorded Investment 4,966 1,832 4,966 1,832 1,694
Impaired Financing Receivable, Unpaid Principal Balance 9,178 4,220 9,178 4,220 3,705
Impaired Financing Receivable, Average Recorded Investment 4,954 1,991 5,009 2,560 1,918
Impaired Financing Receivable, Interest Income, Accrual Method 120 61 355 197 234
Commercial, Financial And Agricultural Loan [Member]          
Financing Receivable, Past Due [Line Items]          
Impaired Financing Receivable, with No Related Allowance, Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method
Impaired Financing Receivable, with Related Allowance, Recorded Investment
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance
Impaired Financing Receivable, Related Allowance
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method
Impaired Financing Receivable, Recorded Investment
Impaired Financing Receivable, Unpaid Principal Balance
Impaired Financing Receivable, Average Recorded Investment
Impaired Financing Receivable, Interest Income, Accrual Method
Construction Loans [Member]          
Financing Receivable, Past Due [Line Items]          
Impaired Financing Receivable, with No Related Allowance, Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method
Impaired Financing Receivable, with Related Allowance, Recorded Investment    
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance
Impaired Financing Receivable, Related Allowance
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method
Impaired Financing Receivable, Recorded Investment
Impaired Financing Receivable, Unpaid Principal Balance
Impaired Financing Receivable, Average Recorded Investment
Impaired Financing Receivable, Interest Income, Accrual Method
Residential Mortgage [Member]          
Financing Receivable, Past Due [Line Items]          
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 39 207 39 207 133
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 55 259 55 259 151
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment 39 133 45 196 131
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 1 3 2 8 6
Impaired Financing Receivable, with Related Allowance, Recorded Investment
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance
Impaired Financing Receivable, Related Allowance
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method  
Impaired Financing Receivable, Recorded Investment 39 207 39 207 133
Impaired Financing Receivable, Unpaid Principal Balance 55 259 55 259 151
Impaired Financing Receivable, Average Recorded Investment 39 133 45 196 131
Impaired Financing Receivable, Interest Income, Accrual Method 1 3 2 8 6
Commercial Real Estate [Member]          
Financing Receivable, Past Due [Line Items]          
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 4,759 1,538 4,759 1,538 1,521
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 8,955 3,869 8,955 3,869 3,514
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment 4,747 1,772 4,795 2,239 1,748
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 117 57 347 183 223
Impaired Financing Receivable, with Related Allowance, Recorded Investment 67 67 40
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance 67 67 40
Impaired Financing Receivable, Related Allowance 1 1 1
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment 67 104 39
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method 1 5 5
Impaired Financing Receivable, Recorded Investment 4,759 1,605 4,759 1,605 1,561
Impaired Financing Receivable, Unpaid Principal Balance 8,955 3,936 8,955 3,936 3,554
Impaired Financing Receivable, Average Recorded Investment 4,747 1,839 4,795 2,343 1,787
Impaired Financing Receivable, Interest Income, Accrual Method 117 58 347 188 228
Home Equity Line of Credit [Member]          
Financing Receivable, Past Due [Line Items]          
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 168 20 168 20
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 168 25 168 25
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment 168 19 169 21
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 2 6 1
Impaired Financing Receivable, with Related Allowance, Recorded Investment
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance
Impaired Financing Receivable, Related Allowance
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method
Impaired Financing Receivable, Recorded Investment 168 20 168 20
Impaired Financing Receivable, Unpaid Principal Balance 168 25 168 25
Impaired Financing Receivable, Average Recorded Investment 168 19 169 21
Impaired Financing Receivable, Interest Income, Accrual Method 2 6 1
Consumer Portfolio Segment [Member]          
Financing Receivable, Past Due [Line Items]          
Impaired Financing Receivable, with No Related Allowance, Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method
Impaired Financing Receivable, with Related Allowance, Recorded Investment
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance
Impaired Financing Receivable, Related Allowance
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method
Impaired Financing Receivable, Recorded Investment
Impaired Financing Receivable, Unpaid Principal Balance
Impaired Financing Receivable, Average Recorded Investment
Impaired Financing Receivable, Interest Income, Accrual Method