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Allowance for Loan Losses - Narrative (Details)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
loan_class
Dec. 31, 2021
USD ($)
Jun. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Number of loan classes | loan_class 8          
Percent of related loans 0.65% 0.69%        
Increase (decrease) in qualitative portion $ 832          
Allowance for loan losses $ 16,387 $ 15,521 $ 16,201 $ 17,507 $ 17,034 $ 16,253
Allowance for loan losses as a percent of total loans 0.88% 0.94%   1.08%    
Number of classes in the commercial loan portfolio | loan_class 3          
Loan-to-value percent, commercial real estate 80.00%          
Number of classes in the residential loan portfolio | loan_class 2          
Construction loans, percent of capital 67.90%          
Construction loans, maximum percent of capital 100.00%          
Construction loans and non-owner-occupied commercial real estate loans, percent of capital 221.40%          
Construction loans and non-owner-occupied commercial real estate loans, maximum percent of capital 300.00%          
Outstanding loans and commitments subject by independent consulting firm 60.00%          
Residential loans, loan to value percent minimum 75.00%          
Residential loans, loan to value percent, maximum 80.00%          
Consumer loans, loan to value percent, minimum 80.00%          
Consumer loans, loan to value percent, maximum 90.00%          
Consumer            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Allowance for loan losses $ 872 $ 833 866 $ 867 892 778
Delinquent period before consumer loans are charged off 120 days          
Residential            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loan to value ratio 0.80          
Amortization term (in years) 30 years          
Delinquent period before residential loans are placed on non-accrual status 90 days          
Delinquent period for loans charged off 180 days          
Delinquent period for loans charged off after receipt of notification 60 days          
Residential |    Construction            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Allowance for loan losses $ 168 148 191 142 160 102
Loan maturities 1 year          
Home equity line of credit            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Allowance for loan losses $ 993 925 966 956 959 1,211
Loan maturities 300 months          
Loan to value ratio 0.80          
Commercial |    Construction            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Allowance for loan losses $ 1,121 746 $ 1,151 879 $ 750 $ 662
Loan maturities 2 years          
Unallocated Reserves            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Allowance for loan losses $ 1,937 $ 1,782   1,487    
Percent of total allowance reserve 11.80% 11.50%        
Unallocated Reserves | Consumer            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Allowance for loan losses $ 0 $ 0   0    
Unallocated Reserves | Residential |    Construction            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Allowance for loan losses 0 0   0    
Unallocated Reserves | Home equity line of credit            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Allowance for loan losses 0 0   0    
Unallocated Reserves | Commercial |    Construction            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Allowance for loan losses $ 0 $ 0   $ 0