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Schedule of loan category and loans individually evaluated and considered impaired (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Financing Receivable, Past Due [Line Items]      
Impaired Financing Receivable, Related Allowance $ 1 $ 2
Impaired Financing Receivable, Recorded Investment 4,983 1,694 6,113
Impaired Financing Receivable, Unpaid Principal Balance 5,508 3,705 8,649
Impaired Financing Receivable, Average Recorded Investment 4,975 1,918 6,375
Impaired Financing Receivable, Interest Income, Accrual Method 478 234 403
Commercial, Financial And Agricultural Loan [Member]      
Financing Receivable, Past Due [Line Items]      
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 29
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 29
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment 27
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 2
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 29
Impaired Financing Receivable, Unpaid Principal Balance 29
Impaired Financing Receivable, Average Recorded Investment 27
Impaired Financing Receivable, Interest Income, Accrual Method 2
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 34 133 440
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 51 151 499
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment 34 131 440
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 3 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 34 133 440
Impaired Financing Receivable, Unpaid Principal Balance 51 151 499
Impaired Financing Receivable, Average Recorded Investment 34 131 440
Impaired Financing Receivable, Interest Income, Accrual Method 3 6 1
Commercial Real Estate [Member]      
Financing Receivable, Past Due [Line Items]      
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 4,752 1,521 5,508
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 5,260 3,514 7,980
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment 4,747 1,748 5,770
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 464 223 388
Impaired Financing Receivable, with Related Allowance, Recorded Investment 40 123
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance 40 123
Impaired Financing Receivable, Related Allowance 1 2
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment 39 123
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method 5 11
Impaired Financing Receivable, Recorded Investment 4,752 1,561 5,631
Impaired Financing Receivable, Unpaid Principal Balance 5,260 3,554 8,103
Impaired Financing Receivable, Average Recorded Investment 4,747 1,787 5,893
Impaired Financing Receivable, Interest Income, Accrual Method 464 228 399
Home Equity Line of Credit [Member]      
Financing Receivable, Past Due [Line Items]      
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 168 42
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 168 47
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment 167 42
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 9 3
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 42
Impaired Financing Receivable, Unpaid Principal Balance 168 47
Impaired Financing Receivable, Average Recorded Investment 167 42
Impaired Financing Receivable, Interest Income, Accrual Method 9 3
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