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Provision Benefit For Domestic And Foreign Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Current income taxes:
Federal	$ 29,400	$ (2,026)	$ 13,087
State	2,863	1,207	3,271
Foreign	44,434	23,334	16,394
Current provision for income taxes	76,697	22,515	32,752
Deferred income taxes:
Federal	(3,530)	3,341	(5,334)
State	(317)	341	(1,838)
Foreign	(2,717)	2,907	(6,620)
Deferred (benefit) provision for income taxes	(6,564)	6,589	(13,792)
Total provision for income taxes	$ 70,133	$ 29,104	$ 18,960

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