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Accumulated Other Comprehensive Income (Loss) (Table Text Block) | 12 Months Ended
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Mar. 31, 2025
Table Text Block [Abstract] |
Summary of Accumulated Other Comprehensive Income (Loss) Components, Net of Tax | A summary of our AOCI components, net of tax, were as follows:
|  | Foreign Currency Translation |  |  | Unrealized Net Gains (Losses) on Investments and Impact of LFPB Discount Rates (a) |  |  | Fair Value of Cash Flow Hedges |  |  | Postretirement Benefit Obligation Net Loss |  |  | Accumulated Other Comprehensive Income (Loss) |
|  | (In thousands) |
Balance as of March 31, 2022 | $ |  | (55,757 | ) | $ |  | 56,737 |  | $ |  | (444 | ) | $ |  | (2,442 | ) | $ |  | (1,906 | )
Foreign currency translation |  |  | (782 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (782 | )
Unrealized net gains (losses) on investments and future policy benefits discount rate remeasurement gains (losses) |  |  | — |  |  |  | (289,477 | ) |  |  | — |  |  |  | — |  |  |  | (289,477 | )
Change in fair value of cash flow hedges |  |  | — |  |  |  | — |  |  |  | 5,033 |  |  |  | — |  |  |  | 5,033 |
Amounts reclassified into earnings on hedging activities |  |  | — |  |  |  | — |  |  |  | (582 | ) |  |  | — |  |  |  | (582 | )
Change in post retirement benefit obligations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,091 |  |  |  | 2,091 |
Other comprehensive income (loss) |  |  | (782 | ) |  |  | (289,477 | ) |  |  | 4,451 |  |  |  | 2,091 |  |  |  | (283,717 | )
Balance as of March 31, 2023 | $ |  | (56,539 | ) | $ |  | (232,740 | ) | $ |  | 4,007 |  | $ |  | (351 | ) | $ |  | (285,623 | )
Foreign currency translation |  |  | 2,832 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,832 |
Unrealized net gains (losses) on investments and future policy benefits discount rate remeasurement gains (losses) |  |  | — |  |  |  | 55,857 |  |  |  | — |  |  |  | — |  |  |  | 55,857 |
Change in fair value of cash flow hedges |  |  | — |  |  |  | — |  |  |  | 6,410 |  |  |  | — |  |  |  | 6,410 |
Amounts reclassified into earnings on hedging activities |  |  | — |  |  |  | — |  |  |  | (4,087 | ) |  |  | — |  |  |  | (4,087 | )
Change in post retirement benefit obligations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,395 |  |  |  | 1,395 |
Other comprehensive income (loss) |  |  | 2,832 |  |  |  | 55,857 |  |  |  | 2,323 |  |  |  | 1,395 |  |  |  | 62,407 |
Balance as of March 31, 2024 | $ |  | (53,707 | ) | $ |  | (176,883 | ) | $ |  | 6,330 |  | $ |  | 1,044 |  | $ |  | (223,216 | )
Foreign currency translation |  |  | (3,833 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (3,833 | )
Unrealized net gains (losses) on investments and future policy benefits discount rate remeasurement gains (losses) |  |  | — |  |  |  | 2,563 |  |  |  | — |  |  |  | — |  |  |  | 2,563 |
Change in fair value of cash flow hedges |  |  | — |  |  |  | — |  |  |  | 3,705 |  |  |  | — |  |  |  | 3,705 |
Amounts reclassified into earnings on hedging activities |  |  | — |  |  |  | — |  |  |  | (10,091 | ) |  |  | — |  |  |  | (10,091 | )
Change in post retirement benefit obligations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,558 |  |  |  | 1,558 |
Other comprehensive income (loss) |  |  | (3,833 | ) |  |  | 2,563 |  |  |  | (6,386 | ) |  |  | 1,558 |  |  |  | (6,098 | )
Balance as of March 31, 2025 | $ |  | (57,540 | ) | $ |  | (174,320 | ) | $ |  | (56 | ) | $ |  | 2,602 |  | $ |  | (229,314 | )
(a) Liability for future policy benefits

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