Off-Balance Sheet Risk - Schedule of Loan Commitments and Standby Letters of Credit (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Loan commitments	$ 1,198,239	$ 981,567
Standby letters of credit	15,451	12,805
Home equity lines of credit
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Loan commitments	197,995	177,262
Unadvanced construction loans
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Loan commitments	270,229	227,135
Other loan commitments
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Loan commitments	$ 730,015	$ 577,170