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Financial Instruments with Off-Balance Sheet Risk (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Dec. 31, 2022
Dec. 31, 2021
Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Increase (decrease) in available commitments   $ (318) $ (993)  
Commercial lines of credit        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loan commitments and standby letters of credit, off-balance sheet   292,204 330,234  
Revolving home equity lines        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loan commitments and standby letters of credit, off-balance sheet   218,907 210,938  
Undisbursed construction loans        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loan commitments and standby letters of credit, off-balance sheet   43,179 78,381  
Personal and other lines of credit        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loan commitments and standby letters of credit, off-balance sheet   10,842 11,001  
Standby letters of credit        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loan commitments and standby letters of credit, off-balance sheet   1,738 3,657  
Total unfunded loan commitments and standby letters of credit        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loan commitments and standby letters of credit, off-balance sheet   $ 566,870 634,211  
Percentage of commitments expiring in 2023   42.00%    
Percentage of commitments expiring between 2024 and 2030   42.00%    
Percentage of commitments expiring 2030 and thereafter   16.00%    
Allowance for off-balance sheet commitments   $ 1,500 $ 1,800 $ 610
Increase (decrease) in available commitments $ 36,900      
Total unfunded loan commitments and standby letters of credit | Cumulative Effect, Period of Adoption, Adjusted Balance        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Allowance for off-balance sheet commitments 1,100      
Total unfunded loan commitments and standby letters of credit | Cumulative Effect, Period of Adoption, Adjustment        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Allowance for off-balance sheet commitments $ 550