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Investments and Fair Value Measurements- Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Debt Securities, Available-for-sale [Line Items] |  |  |
Investments held and classified as restricted trading securities | $ 104,139 |  |
Interest income from cash, cash equivalents, and investments | 38,700 | $ 11,100 | $ 200
Mutual funds |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Investments held and classified as restricted trading securities | $ 102 |  |

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