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Loans Receivable and ACL Text Tags (Details) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($)
Loans and Leases Receivable Disclosure [Abstract] |  |  |  |
Unamortized premiums, deferred costs and fees, net | $ (3,000) |  | $ (2,800) |
Number of Loans Originated Under the Paycheck Protection Program |  |  |  | 420
Loans Originated Under the Paycheck Protection Program, Amount |  |  |  | $ 57,100
Financing Receivable, Nonaccrual, Interest Income | 0 |  |  |
Other Real Estate Owned | $ 60 |  | $ 60 |
Number of Real Estate Properties | 1 |  | 1 |
Financing Receivable, Held-for-Sale | $ 0 |  | $ 0 |
Financing Receivable, 90 Days or More Past Due, Still Accruing | $ 0 |  | $ 0 |
Financing Receivable, Modified in Period, Amount |  | $ 1,000 |  |
Number of Modified Loan Subsequently Defaulted | 0 | 0 |  |
Loans and Leases Receivable, Related Parties | $ 0 |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | 0 | 2 |  |
Financing Receivable, Modified, Accumulated | $ 7,400 |  |  |
Nonperforming |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Financing Receivable, Modified, Accumulated | $ 1,600 |  |  |
Performing |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | 4 |  |  |
Financing Receivable, Modified, Accumulated | $ 5,800 |  |  |
Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing Receivable, Purchase | 6,700 |  |  |
Business |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing Receivable, Purchase | $ 300 |  |  |

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