Commitments, Contingencies and Credit Risk - Financial Instruments Whose Contractual Amounts Represent Credit Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]
Contractual amounts represent credit risk	$ 507,266	$ 281,311
Commitments to Grant Mortgage Loans
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]
Contractual amounts represent credit risk	445,152	207,105
Commitments to Sell Loans at Lock-In Rates
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]
Contractual amounts represent credit risk		1,676
Unfunded Commitments Under Lines of Credit
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]
Contractual amounts represent credit risk	$ 62,114	$ 72,530