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Loans (Details 3) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Financing Receivable, Past Due [Line Items]      
Impaired Financing Receivable, Related Allowance $ 2 $ 1
Impaired Financing Receivable, Recorded Investment 1,541 6,035 1,694
Impaired Financing Receivable, Unpaid Principal Balance 3,549 8,755 3,705
Impaired Financing Receivable, Average Recorded Investment 1,779 6,286 1,918
Impaired Financing Receivable, Interest Income, Accrual Method 47 107 234
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 42 436 133
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 57 496 151
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment 42 434 131
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 1 5 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 42 436 133
Impaired Financing Receivable, Unpaid Principal Balance 57 496 151
Impaired Financing Receivable, Average Recorded Investment 42 434 131
Impaired Financing Receivable, Interest Income, Accrual Method 1 5 6
Commercial Real Estate [Member]      
Financing Receivable, Past Due [Line Items]      
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 1,499 5,474 1,521
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 3,492 8,129 3,514
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment 1,737 5,728 1,748
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 46 99 223
Impaired Financing Receivable, with Related Allowance, Recorded Investment 104 40
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance 104 40
Impaired Financing Receivable, Related Allowance 2 1
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment 103 39
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method 2 5
Impaired Financing Receivable, Recorded Investment 1,499 5,578 1,561
Impaired Financing Receivable, Unpaid Principal Balance 3,492 8,233 3,554
Impaired Financing Receivable, Average Recorded Investment 1,737 5,831 1,787
Impaired Financing Receivable, Interest Income, Accrual Method 46 101 228
Home Equity Line of Credit [Member]      
Financing Receivable, Past Due [Line Items]      
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 21
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 26
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment 21
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 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 21
Impaired Financing Receivable, Unpaid Principal Balance 26
Impaired Financing Receivable, Average Recorded Investment 21
Impaired Financing Receivable, Interest Income, Accrual Method 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