Income Taxes - Components of Loss Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Domestic	$ (663,740)	$ (292,730)	$ (221,212)
Foreign	(2,891)	(21,698)	242
Loss before income taxes	$ (666,631)	$ (314,428)	$ (220,970)

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details