Investment Securities-Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	$ 5,540
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost	26,553
Debt Securities, Available-for-sale, Amortized Cost	65,200	$ 66,058
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	5,157
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	20,801
Available-for-sale	$ 52,192	53,843
Available-for-Sale Securities, Debt Maturities, Weighted Average Yield
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Weighted Average Rate	4.63%
Available-for-sale Securities, Debt Maturities, after Ten Years, Weighted Average Rate	3.47%
Available-for-sale Securities, Debt Maturities, Weighted Average Rate	2.66%
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount
Held-to-maturity	$ 2,237	2,318
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity
Held-to-maturity, Fair Value	$ 2,107	$ 2,221