Income Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Schedule of Components of Income Before Income Tax Expense (Benefit) [Line Items]
Domestic	$ 7,500	$ 900	$ 24,900
Foreign	33,500	28,100	19,200
Income before income taxes	$ 41,033	$ 29,038	$ 44,097