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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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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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