Loans Receivable and ACL Text Tags (Details)	6 Months Ended
Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Mar. 31, 2025 USD ($)
Loans and Leases Receivable Disclosure [Abstract]
Unamortized premiums, deferred costs and fees, net	$ (2,400,000)		$ (2,600,000)
Financing Receivable, Nonaccrual, Interest Income	0
Other Real Estate Owned	$ 52,000		$ 52,000
Number of Real Estate Properties	1		1
Financing Receivable, Held-for-Sale	$ 0		$ 0
Financing Receivable, Modified, Subsequent Default	0	$ 0
Financing Receivable, Modified in Period, Amount	0	$ 0
Loans and Leases Receivable, Related Parties	0
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Accumulated	1,400,000
Nonperforming
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Accumulated	412,000
Performing
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Accumulated	$ 900,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty.

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Accumulated amortized cost of financing receivable modified for debtor experiencing financial difficulty.

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Amount of interest income on financing receivable on nonaccrual status.

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For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.

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Amount, before valuation allowance, of financing receivable classified as held-for-sale.

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The number of real estate properties owned as of the balance sheet date.

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Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings.

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Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

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