Non-interest Revenue and Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	$ 2,899	$ 4,982
Revenue Not from Contract with Customer	696	2,372
Total non-interest income	3,595	7,354
Deposit Account
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	2,197	2,141
Mortgage Banking
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	466	225
Financial Service, Other
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	$ 236	$ 2,616