Income Taxes - Summary of Activity Related to Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Balance, beginning of fiscal year	$ 92,962	$ 80,591	$ 68,156
Increase (decrease) related to prior year tax positions	(7,486)	(828)	(949)
Increases related to current year tax positions	12,358	13,199	13,384
Balance, end of fiscal year	$ 112,806	$ 92,962	$ 80,591