Other (Expense) Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Other Income (Expense), Net [Abstract]
Foreign currency transaction (losses) gains	$ (1,162)	$ 768
Gain (loss) on marketable securities	543	(40)
(Loss) gain on investments	(156)	1,897
Other	165	(1,302)
Total other (expense) income, net	$ (610)	$ 1,323