Fair Value of Financial Instruments - Summary of Fair Value Measurement of Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring - Estimated Fair Value - USD ($) $ in Thousands |
Sep. 30, 2026 |
Mar. 31, 2026 |
|---|---|---|
| Assets, Fair Value Disclosure [Abstract] | ||
| Individually evaluated loans | $ 65 | |
| Other real estate owned | $ 74 | |
| Total assets at fair value | 65 | 74 |
| Level 3 | ||
| Assets, Fair Value Disclosure [Abstract] | ||
| Individually evaluated loans | 65 | |
| Other real estate owned | 74 | |
| Total assets at fair value | $ 65 | $ 74 |