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Loans and allowance for loan losses (Summary Of Loans, Net) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]    
Principal balance $ 583,384 $ 609,090
Less allowance for loan losses 6,915 7,156
Net loans 576,469 601,934
Net deferred (fees) and costs/premiums (372) (18)
Commercial [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Principal balance 105,067 145,145
Less allowance for loan losses 1,471 2,001
Commercial Real Estate [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Principal balance 338,149 309,563
Less allowance for loan losses 3,637 3,550
Consumer [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Principal balance 89,102 92,344
Less allowance for loan losses 860 868
Residential [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Principal balance 51,066 62,038
Less allowance for loan losses $ 947 $ 737