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Goodwill and Intangible Assets (Tables)
 6 Months Ended
Jan. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of aggregate amortization expense on intangible assets
The following table sets forth amortizable intangible assets by major asset class:
(In thousands)
 
January 31, 2017
 
July 31, 2016
Amortized intangibles:
 
 
 
 
Covenants not to compete
 
$
1,708

 
$
1,702

Supply contracts & customer relationships
 
26,689

 
26,471

Trade name
 
5,095

 
5,163

Licenses and databases
 
2,469

 
2,488

Accumulated amortization
 
(27,023
)
 
(24,063
)
Net intangibles
 
$
8,938

 
$
11,761
Schedule of change in carrying amount of goodwill (in thousands)
The change in the carrying amount of goodwill was as follows (in thousands):
Balance as of July 31, 2016
 
$
260,198

Effect of foreign currency exchange rates
 
(3,331
)
Balance as of January 31, 2017
 
$
256,867