Off-Balance Sheet Risk - Schedule of Loan Commitments and Standby Letters of Credit (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Loan commitments	$ 1,363,976	$ 1,198,239
Standby letters of credit	14,318	15,451
Home equity lines of credit
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Loan commitments	244,367	197,995
Unadvanced construction loans
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Loan commitments	349,850	270,229
Other loan commitments
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Loan commitments	$ 769,759	$ 730,015