Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Mar. 31, 2025
Operating Loss Carryforwards [Line Items]
Provision for (benefit from) income taxes	$ 58,670	$ (11,798)	$ 76,142	$ (4,699)
Effective income tax rate	63.00%	7.00%		2.00%
Valuation allowance	$ 481,900		481,900		$ 430,500
Increase (decrease) in gross unrecognized tax benefits	(8,400)		(1,100)
Increase (decrease) in unrecognized tax benefits income tax penalties and interest expense	6,400		7,800
Impact on effective tax rate	13,700		13,700
Unrecognized tax benefits	187,100		187,100
One Big Beautiful Bill Act [Member]
Operating Loss Carryforwards [Line Items]
Incremental non-cash tax expense	$ 1,500		$ 8,000