Income Taxes - Provision (Benefit) for Domestic and Foreign Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Current income taxes:
Federal	$ 16,913	$ 14,336	$ 6,152
State	4,719	4,974	9,097
Foreign	40,646	33,965	42,091
Current provision for income taxes	62,278	53,275	57,340
Deferred income taxes:
Federal	(5,809)	(6,862)	(16,211)
State	(5,025)	(784)	(7,682)
Foreign	(3,306)	(1,684)	(3,903)
Deferred benefit for income taxes	(14,140)	(9,330)	(27,796)
Total provision for income taxes	$ 48,138	$ 43,945	$ 29,544