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Derivatives (Table Text Block) | 12 Months Ended
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Mar. 31, 2025
Derivative Instrument Detail [Abstract] |
Schedule of Derivative Instruments Included in Trading Activities [Table Text Block] |
|  | March 31, 2025 |  |  | March 31, 2024 |
|  | (In thousands) |
Interest rate swaps designated as cash flow hedges |  |  |  |  |  |
Assets | $ |  | 4,381 |  | $ |  | 8,392 |
Liabilities | $ |  | 777 |  | $ |  | — |
Notional amount | $ |  | 376,887 |  | $ |  | 297,867 |
Schedule of Derivative Liabilities at Fair Value [Table Text Block] |
|  | Derivatives Fair Values as of |
|  | March 31, 2025 |  |  | March 31, 2024 |
|  | (In thousands) |
Equity market contracts as economic hedging instruments |  |  |  |  |  |
Assets | $ |  | 8,819 |  | $ |  | 10,538 |
Notional amount | $ |  | 326,218 |  | $ |  | 526,449 |

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