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Loans and Allowance for Credit Losses - Summary of Loans Individually Evaluated (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
ACL Allocation | $ 4 | $ 116
Other Consumer |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
ACL Allocation | 0 | 9
Land Development and SIDs |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
ACL Allocation | 4 | 39
Real Estate |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Individually evaluated, Recorded investment in loans | 344 | 1,316
Real Estate | Real Estate - Commercial |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Individually evaluated, Recorded investment in loans | 329 | 359
Real Estate | Real Estate - Residential |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Individually evaluated, Recorded investment in loans | 11 | 150
ACL Allocation |  | 68
Real Estate | Land Development and SIDs |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Individually evaluated, Recorded investment in loans | 4 | 807
Other |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Individually evaluated, Recorded investment in loans | 0 | 13
Other | Other Consumer |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Individually evaluated, Recorded investment in loans | $ 0 | $ 13

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