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Allowance for Credit Losses and Credit Quality of Loans, Amortized Cost Basis of Loans Modified to Borrowers Experiencing Financial Difficulty (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2023
Term Extension [Member]    
Modified Loans Disaggregated by Class of Financing Receivable and Type of Concession Granted [Abstract]    
Amortized cost $ 199 $ 242
Combination - Term Extension and Interest Rate Reduction [Member]    
Modified Loans Disaggregated by Class of Financing Receivable and Type of Concession Granted [Abstract]    
Amortized cost 171 171
Residential [Member] | Term Extension [Member]    
Modified Loans Disaggregated by Class of Financing Receivable and Type of Concession Granted [Abstract]    
Amortized cost $ 199 $ 242
% of total class of financing receivables 0.009% 0.011%
Residential [Member] | Combination - Term Extension and Interest Rate Reduction [Member]    
Modified Loans Disaggregated by Class of Financing Receivable and Type of Concession Granted [Abstract]    
Amortized cost $ 171 $ 171
% of total class of financing receivables 0.008% 0.008%