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Description of Business and Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Apr. 30, 2016
Jul. 31, 2015
Cumulative Translation Adjustment Summary [Roll Forward]    
Cumulative loss on foreign currency translation, Begining balance $ (68,510) $ (18,992)
Loss on foreign currency translation (15,281) (49,518)
Cumulative loss on foreign currency translation, Ending balance $ (83,791) $ (68,510)