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v3.23.3

Comprehensive Income (Loss) (Accumulated other comprehensive income (loss) components of net of tax) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward] |  |  |  |
Balance as of March 31, 2023 |  |  | $ (285,623) |
Foreign currency translation | $ (2,849) | $ (739) | (2,380) | $ (542)
Unrealized net gain on investments | (13,297) | (108,444) | 7,047 | (244,826)
Change in fair value of cash flow hedges | 3,333 | 6,289 | 7,175 | 6,417
Amount reclassified from AOCI | (1,015) | 19 | (1,883) | 446
Other comprehensive income (loss) | (13,828) | (102,875) | 9,959 | (238,505)
Balance as of September 30, 2023 | (275,664) |  | (275,664) |
Foreign Currency Translation [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward] |  |  |  |
Balance as of March 31, 2023 |  |  | (56,539) |
Foreign currency translation |  |  | (2,380) |
Unrealized net gain on investments |  |  | 0 |
Change in fair value of cash flow hedges |  |  | 0 |
Amount reclassified from AOCI |  |  | 0 |
Other comprehensive income (loss) |  |  | (2,380) |
Balance as of September 30, 2023 | (58,919) |  | (58,919) |
Unrealized Net Gain on Investments [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward] |  |  |  |
Balance as of March 31, 2023 |  |  | (232,740) |
Foreign currency translation |  |  | 0 |
Unrealized net gain on investments |  |  | 7,047 |
Change in fair value of cash flow hedges |  |  | 0 |
Amount reclassified from AOCI |  |  | 0 |
Other comprehensive income (loss) |  |  | 7,047 |
Balance as of September 30, 2023 | (225,693) |  | (225,693) |
Fair Market Value of Cash Flow Hedges [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward] |  |  |  |
Balance as of March 31, 2023 |  |  | 4,007 |
Foreign currency translation |  |  | 0 |
Unrealized net gain on investments |  |  | 0 |
Change in fair value of cash flow hedges |  |  | 7,175 |
Amount reclassified from AOCI |  |  | (1,883) |
Other comprehensive income (loss) |  |  | 5,292 |
Balance as of September 30, 2023 | 9,299 |  | 9,299 |
Postretirement Benefit Obligation Gain [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward] |  |  |  |
Balance as of March 31, 2023 |  |  | (351) |
Foreign currency translation |  |  | 0 |
Unrealized net gain on investments |  |  | 0 |
Change in fair value of cash flow hedges |  |  | 0 |
Amount reclassified from AOCI |  |  | 0 |
Other comprehensive income (loss) |  |  | 0 |
Balance as of September 30, 2023 | (351) |  | (351) |
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) Components, Net of Tax [Roll Forward] |  |  |  |
Balance as of March 31, 2023 |  |  | (285,623) |
Foreign currency translation | (2,849) | (739) | (2,380) | (542)
Unrealized net gain on investments | (13,297) | (108,444) | 7,047 | (244,826)
Change in fair value of cash flow hedges | 3,333 | 6,289 | 7,175 | 6,417
Amount reclassified from AOCI | (1,015) | $ 19 | (1,883) | $ 446
Other comprehensive income (loss) |  |  | 9,959 |
Balance as of September 30, 2023 | $ (275,664) |  | $ (275,664) |

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