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credit quality segments of loans receivable and the allowance for loan losses (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Financing Receivable, Past Due [Line Items]    
Totals $ 1,032,345 $ 1,027,738
Allowance For Loan And Lease Losses Collectively Evaluated Loans Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 998,869 1,011,757
Potential problem loans 1 36,847 18,198
Impaired loans
Unallocated allowance
Totals 1,035,716 1,029,955
Allowance For Loan And Lease Losses Collectively Evaluated Allowance Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 8,644 10,424
Potential problem loans 1 2,753 1,460
Impaired loans
Unallocated allowance 1,148 1,207
Totals 12,545 13,091
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 10,226 11,909
Unallocated allowance
Totals 10,226 11,909
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 163 663
Unallocated allowance
Totals 163 663
Allowance For Loan And Lease Losses Total Portfolio Loans Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 998,869 1,011,757
Potential problem loans 1 36,847 18,198
Impaired loans 10,226 11,909
Unallocated allowance
Totals 1,045,942 1,041,864
Allowance For Loan And Lease Losses Total Portfolio Allowance Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 8,644 10,424
Potential problem loans 1 2,753 1,460
Impaired loans 163 663
Unallocated allowance 1,148 1,207
Totals $ 12,708 $ 13,754