Segment Information - Revenues by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Total revenues	$ 4,519,571	$ 4,283,758	$ 2,556,158
U.S. Customers [Member]
Segment Reporting Information [Line Items]
Total revenues	3,117,233	3,029,303	2,147,651
Non U.S. Customers [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 1,402,338	$ 1,254,455	$ 408,507