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credit quality segments of loans receivable and the allowance for loan losses (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Financing Receivable, Past Due [Line Items]    
Totals $ 1,041,185 $ 1,027,738
Allowance For Loan And Lease Losses Collectively Evaluated Loans Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 1,007,513 1,011,757
Potential problem loans 1 37,519 18,198
Impaired loans
Unallocated allowance
Totals 1,045,032 1,029,955
Allowance For Loan And Lease Losses Collectively Evaluated Allowance Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 9,131 10,424
Potential problem loans 1 3,129 1,460
Impaired loans
Unallocated allowance 1,275 1,207
Totals 13,535 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 11,404 11,909
Unallocated allowance
Totals 11,404 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 351 663
Unallocated allowance
Totals 351 663
Allowance For Loan And Lease Losses Total Portfolio Loans Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 1,007,513 1,011,757
Potential problem loans 1 37,519 18,198
Impaired loans 11,404 11,909
Unallocated allowance
Totals 1,056,436 1,041,864
Allowance For Loan And Lease Losses Total Portfolio Allowance Credit Quality Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Performing loans 9,131 10,424
Potential problem loans 1 3,129 1,460
Impaired loans 351 663
Unallocated allowance 1,275 1,207
Totals $ 13,886 $ 13,754