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Loans, net and allowance for credit losses - Information Concerning Nonaccrual Loans by Major Loan Classification (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due.    
Nonaccrual loans, Total $ 1,798 $ 2,035
Commercial    
Financing Receivable, Recorded Investment, Past Due.    
Nonaccrual loans, Total 14 86
Commercial real estate    
Financing Receivable, Recorded Investment, Past Due.    
Nonaccrual loans, Total 867 1,155
Residential real estate    
Financing Receivable, Recorded Investment, Past Due.    
Nonaccrual loans, Total 723 562
Consumer    
Financing Receivable, Recorded Investment, Past Due.    
Nonaccrual loans, Total $ 194 $ 232