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Other Income (Expense), Net (Tables)
3 Months Ended
Oct. 31, 2015
Other Income (Expense), Net [Abstract]  
Schedule of other income (expense) , net
        
   Three Months Ended
October 31,
 
  2015   2014 
   (in thousands) 
Foreign currency transaction (losses) gains $(1,162) $768 
Gain (loss) on marketable securities  543   (40)
(Loss) gain on investments  (156)  1,897 
Other  165   (1,302)
         
Total other (expense) income, net $(610) $1,323