Schedule of Disaggregated Revenue by Major Business Line (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Total revenue	$ 1,031,753	$ 847,522	$ 840,883
United States [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	837,613	691,579	705,409
Europe [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	131,909	105,320	94,266
Japan [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	51,694	42,868	35,215
Rest of world [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	10,537	7,755	5,993
Outside the U.S Member
Disaggregation Of Revenue [Line Items]
Total revenue	194,140	155,943	135,474
Product Member
Disaggregation Of Revenue [Line Items]
Total revenue	984,541	806,322	806,824
Service and Other
Disaggregation Of Revenue [Line Items]
Total revenue	$ 47,212	$ 41,200	$ 34,059