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credit quality segments of loans receivable and the allowance for loan losses (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Past Due [Line Items]    
Totals $ 1,027,738 $ 927,413
Allowance For Loan And Lease Losses Collectively Evaluated Loans Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 1,011,757 913,648
Potential problem loans 1 18,198 9,903
Impaired loans
Unallocated allowance
Totals 1,029,955 923,551
Allowance For Loan And Lease Losses Collectively Evaluated Allowance Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 10,424 7,251
Potential problem loans 1 1,460 382
Impaired loans
Unallocated allowance 1,207 569
Totals 13,091 8,202
Allowance For Loan And Lease Losses Individually Evaluated Loans Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans
Potential problem loans 1
Impaired loans 11,909 11,395
Unallocated allowance
Totals 11,909 11,395
Allowance For Loan And Lease Losses Individually Evaluated Allowance Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans
Potential problem loans 1
Impaired loans 663 693
Unallocated allowance
Totals 663 693
Allowance For Loan And Lease Losses Total Portfolio Loans Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 1,011,757 913,648
Potential problem loans 1 18,198 9,903
Impaired loans 11,909 11,395
Unallocated allowance
Totals 1,041,864 934,946
Allowance For Loan And Lease Losses Total Portfolio Allowance Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 10,424 7,251
Potential problem loans 1 1,460 382
Impaired loans 663 693
Unallocated allowance 1,207 569
Totals $ 13,754 $ 8,895