Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Cumulative Translation Adjustment Summary [Roll Forward]
Cumulative loss on foreign currency translation, Beginning balance	$ (68,510)	$ (18,992)
Gain (loss) on foreign currency translation	(40,684)	(49,518)	$ 26,428
Cumulative loss on foreign currency translation, Ending balance	$ (109,194)	$ (68,510)	$ (18,992)