Loans Receivable and the Allowance for Loan Losses - Summary of credit risk profile by internally assigned grade (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loans Receivable and the Allowance for Loan Losses
Loans receivable	$ 1,117,417	$ 972,851
Pass
Loans Receivable and the Allowance for Loan Losses
Loans receivable	1,117,417	972,105
Substandard
Loans Receivable and the Allowance for Loan Losses
Loans receivable		746
Residential real estate
Loans Receivable and the Allowance for Loan Losses
Loans receivable	116,941	120,358
Residential real estate | Pass
Loans Receivable and the Allowance for Loan Losses
Loans receivable	116,941	120,358
Non-residential real estate
Loans Receivable and the Allowance for Loan Losses
Loans receivable	25,587	50,016
Non-residential real estate | Pass
Loans Receivable and the Allowance for Loan Losses
Loans receivable	25,587	49,270
Non-residential real estate | Substandard
Loans Receivable and the Allowance for Loan Losses
Loans receivable		746
Construction
Loans Receivable and the Allowance for Loan Losses
Loans receivable	862,450	683,830
Construction | Pass
Loans Receivable and the Allowance for Loan Losses
Loans receivable	862,450	683,830
Commercial and industrial
Loans Receivable and the Allowance for Loan Losses
Loans receivable	111,416	118,378
Commercial and industrial | Pass
Loans Receivable and the Allowance for Loan Losses
Loans receivable	111,416	118,378
Consumer
Loans Receivable and the Allowance for Loan Losses
Loans receivable	1,023	269
Consumer | Pass
Loans Receivable and the Allowance for Loan Losses
Loans receivable	$ 1,023	$ 269