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Allowance for credit losses for loans (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Commercial Real Estate Portfolio Segment [Member]        
Financing Receivable, Past Due [Line Items]        
Loans and Leases Receivable, Allowance $ 4,279 $ 1,593 $ 1,921 $ 1,811
Allowance for Loan and Lease Losses, Period Increase (Decrease) (427) 367 (516) 194
Allowance for Loan and Lease Losses, Writeoff (46)
Allowance for Loan and Lease Loss, Recovery of Bad Debts 1
Loans and Leases Receivable, Allowance 3,852 1,960 3,852 1,960
[custom:LoansAndLeasesReceivableAllowanceAccountingAdoptionImpact-1]     2,447  
[custom:LoansAndLeasesReceivableAllowanceSubtotal-1]     4,368  
Commercial Portfolio Segment [Member]        
Financing Receivable, Past Due [Line Items]        
Loans and Leases Receivable, Allowance 5,894 6,900 8,425 6,973
Allowance for Loan and Lease Losses, Period Increase (Decrease) (29) 35 676 296
Allowance for Loan and Lease Losses, Writeoff (39) (373)
Allowance for Loan and Lease Loss, Recovery of Bad Debts 1 1
Loans and Leases Receivable, Allowance 5,865 6,897 5,865 6,897
[custom:LoansAndLeasesReceivableAllowanceAccountingAdoptionImpact-1]     (3,236)  
[custom:LoansAndLeasesReceivableAllowanceSubtotal-1]     5,189  
Residential Portfolio Segment [Member]        
Financing Receivable, Past Due [Line Items]        
Loans and Leases Receivable, Allowance 5,226 3,253 4,108 3,020
Allowance for Loan and Lease Losses, Period Increase (Decrease) 15 598 301 851
Allowance for Loan and Lease Losses, Writeoff (239) (259)
Allowance for Loan and Lease Loss, Recovery of Bad Debts 1
Loans and Leases Receivable, Allowance 5,241 3,612 5,241 3,612
[custom:LoansAndLeasesReceivableAllowanceAccountingAdoptionImpact-1]     831  
[custom:LoansAndLeasesReceivableAllowanceSubtotal-1]     4,939  
Consumer Portfolio Segment [Member]        
Financing Receivable, Past Due [Line Items]        
Loans and Leases Receivable, Allowance 610 302 392 277
Allowance for Loan and Lease Losses, Period Increase (Decrease) 38 66 60 102
Allowance for Loan and Lease Losses, Writeoff (50) (39) (85) (56)
Allowance for Loan and Lease Loss, Recovery of Bad Debts 2 4 4 10
Loans and Leases Receivable, Allowance 600 333 600 333
[custom:LoansAndLeasesReceivableAllowanceAccountingAdoptionImpact-1]     229  
[custom:LoansAndLeasesReceivableAllowanceSubtotal-1]     621  
Finance Leases Portfolio Total Segment [Member]        
Financing Receivable, Past Due [Line Items]        
Loans and Leases Receivable, Allowance 16,009 12,915 14,846 12,962
Allowance for Loan and Lease Losses, Period Increase (Decrease) (403) 1,100 521 1,463
Allowance for Loan and Lease Losses, Writeoff (50) (317) (85) (734)
Allowance for Loan and Lease Loss, Recovery of Bad Debts 2 5 5 12
Loans and Leases Receivable, Allowance $ 15,558 13,703 15,558 13,703
[custom:LoansAndLeasesReceivableAllowanceAccountingAdoptionImpact-1]     271  
[custom:LoansAndLeasesReceivableAllowanceSubtotal-1]     $ 15,117  
Unallocated Financing Receivables [Member]        
Financing Receivable, Past Due [Line Items]        
Loans and Leases Receivable, Allowance   867   881
Allowance for Loan and Lease Losses, Period Increase (Decrease)   34   20
Allowance for Loan and Lease Losses, Writeoff    
Allowance for Loan and Lease Loss, Recovery of Bad Debts    
Loans and Leases Receivable, Allowance   $ 901   $ 901