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Description of Business and Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Apr. 30, 2014
Jul. 31, 2013
Cumulative Translation Adjustment Summary [Roll Forward]    
Cumulative loss on foreign currency translation, Begining balance $ (45,420) $ (34,933)
Gain (Loss) on foreign currency translation 25,015 (10,487)
Cumulative loss on foreign currency translation, Ending balance $ (20,405) $ (45,420)