Other Income (Expense), Net - Schedule of Other Income (Expense), Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Other Operating Gains (Loss) and Other (Expense) Income, Net [Abstract]
Foreign currency transaction (losses) gains	$ (478)	$ 1,521	$ (4,840)	$ 3,566
Gain on investments	581	960	1,434	1,565
Other	56	(48)	(49)	2
Total other income (expense), net	$ 159	$ 2,433	$ (3,455)	$ 5,133