Loans and Allowance for Credit Losses - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
Jun. 30, 2026	Mar. 31, 2026
Financing Receivable, Past Due [Line Items]
Loans receivable from related parties	$ 447,520,000	$ 448,406,000
Loans excludes allowance for off-balance sheet	215,000	215,000
60 Days Past Due
Financing Receivable, Past Due [Line Items]
Residential real estate loan outstanding balance	1,700,000
Directors and Officers
Financing Receivable, Past Due [Line Items]
Loans receivable from related parties	1,700,000	1,700,000
Federal Home Loan Mortgage Corp
Financing Receivable, Past Due [Line Items]
Loans receivable from related parties	$ 841,000	$ 861,000

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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- Definition

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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