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Allowance for Credit Losses (Impaired Loans) (Details)
Oct. 31, 2022
USD ($)
loan
Sep. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Loan loss allowances      
Total troubled debt restructuring   $ 2,811,000 $ 3,253,000
Amount of loans with some degree of payment deferral $ 54,405,000    
Period of charge off for past due unsecured commercial loans   90 days  
Paycheck protection program loans (COVID-19 program)      
Loan loss allowances      
Number of loans | loan 223    
Amount of loans outstanding $ 9,292,000    
Real estate - mortgage | Domestic | Residential: first lien      
Loan loss allowances      
Total troubled debt restructuring   $ 1,658,000 2,254,000
Real estate - mortgage | Domestic | Residential Junior Lien      
Loan loss allowances      
Total troubled debt restructuring   323,000 105,000
Consumer | Domestic      
Loan loss allowances      
Total troubled debt restructuring   773,000 878,000
Foreign. | Foreign      
Loan loss allowances      
Total troubled debt restructuring   $ 57,000 $ 16,000