Income Taxes - Schedule of Income Taxes Paid Net of Refunds Received (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Income Tax Paid, by Individual Jurisdiction [Line Items]
Federal	$ 10,103
State	1,472
Total cash paid for income taxes, net	80,701	$ 196,290	$ 200,561
United Kingdom [Member]
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	49,443
Brazil [Member]
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	5,928
Other foreign jurisdictions [Member]
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	$ 13,755