Financial Transactions with Off-Balance-Sheet Risk and Concentrations of Credit Risk - Schedule of Loan Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Concentration Risk [Line Items]
Loan commitments	$ 102,117	$ 254,401
Residential real estate
Concentration Risk [Line Items]
Loan commitments	12,298	55,852
Multifamily
Concentration Risk [Line Items]
Loan commitments	0	50,175
Commercial real estate
Concentration Risk [Line Items]
Loan commitments	7,203	17,621
Commercial business
Concentration Risk [Line Items]
Loan commitments	23,217	24,846
Construction
Concentration Risk [Line Items]
Loan commitments	54,082	100,430
Home equity loans and advances
Concentration Risk [Line Items]
Loan commitments	$ 5,317	$ 5,477