Components of Provision (Benefit from) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Current income taxes provision (benefit):
Federal	$ (200)	$ 2,500	$ (2,800)
State	200	(200)
Non-U.S.	2,900	6,400	6,000
Current income tax provision	2,900	8,700	3,200
Deferred income taxes provision (benefit):
Federal	2,700	(2,900)	1,900
State		(100)	200
Non-U.S.	2,400	2,500	2,300
Deferred income taxes provision (benefit)	5,070	(457)	4,404
Provision for income taxes	$ 7,974	$ 8,189	$ 7,552