Off-Balance Sheet Financial Instruments and Guarantees (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Loss Contingencies [Line Items]
Financial instrument commitments	$ 243,068	$ 224,760
Commitments to grant loans [Member]
Loss Contingencies [Line Items]
Financial instrument commitments	82,432	82,444
Unfunded commitments under lines of credit [Member]
Loss Contingencies [Line Items]
Financial instrument commitments	151,759	136,710
Standby letters of credit [Member]
Loss Contingencies [Line Items]
Financial instrument commitments	$ 8,877	$ 5,606