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Goodwill (Tables)
 12 Months Ended
Jul. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of change in carrying amount of goodwill
The change in the carrying amount of goodwill was as follows:
 
July 31,
(In thousands)
2015
 
2014
Beginning balance
$
283,780

 
$
267,463

Goodwill recorded during the period
(790
)
 
7,724

Effect of foreign currency exchange rates
(11,140
)
 
8,593

Ending balance
$
271,850

 
$
283,780