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Description of Business and Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jan. 31, 2017
Accounting Policies [Abstract]  
Schedule of foreign currency translation
The cumulative effects of foreign currency exchange rate fluctuations were as follows (in thousands):
Cumulative loss on foreign currency translation as of July 31, 2015
 
$
(68,510
)
Loss on foreign currency translation
 
(40,684
)
Cumulative loss on foreign currency translation as of July 31, 2016
 
$
(109,194
)
Loss on foreign currency translation
 
(10,355
)
Cumulative loss on foreign currency translation as of January 31, 2017
 
$
(119,549
)