Other Income (Expense), Net - Schedule of Other Income (Expense), Net (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Other (Expense) Income, Net [Abstract]
Foreign currency transaction (losses) gains	$ (5,883)	$ 2,538	$ (2,859)
Gain on investments	1,218	2,664	1,172
Gain on modification and early termination of loan payable		238
Gain on sales of buildings and other assets		11	197
Other	(35)	(68)	(277)
TOTAL	$ (4,700)	$ 5,383	$ (1,767)