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Goodwill (Tables)
 12 Months Ended
Jul. 31, 2018
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)
 
2018
 
2017
Beginning balance
 
$
340,243

 
$
260,198

Goodwill recorded during the period
 
(1,839
)
 
79,256

Effect of foreign currency exchange rates
 
(1,169
)
 
789

Ending balance
 
$
337,235

 
$
340,243