Financial Instruments with Off-Balance Sheet Risk, Commitments and Contingencies - Schedule of Notional Amounts of Financial Instruments with Off-Balance Sheet Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Unadvanced portions of loans [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Unadvanced portions of loans	$ 44,929	$ 42,781
Commitments to originate loans [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Unadvanced portions of loans	16,134	15,103
Standby letters of credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Unadvanced portions of loans	$ 302	$ 318