Segment Information - Revenues by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Total revenues	$ 1,140,893	$ 1,122,262	$ 2,311,947	$ 2,248,722
U.S. Customers [Member]
Segment Reporting Information [Line Items]
Total revenues	779,662	776,785	1,594,995	1,553,280
Non U.S. Customers [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 361,231	$ 345,477	$ 716,952	$ 695,442