Segment Information - Revenue Information by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Total revenues	$ 664,860	$ 530,488
U.S. Customers [Member]
Segment Reporting Information [Line Items]
Total revenues	567,486	498,515
Non U.S. Customers [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 97,374	$ 31,973