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Goodwill and Intangible Assets
 6 Months Ended
Jan. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets NOTE 4 – Goodwill and Intangible Assets
The following table sets forth amortizable intangible assets by major asset class:
(In thousands)
 
January 31, 2019
 
July 31, 2018
Amortized intangibles:
 
 
 
 
Supply contracts & customer relationships
 
$
49,206

 
$
71,787

Trade name
 
23,573

 
24,173

Licenses and databases
 
7,706

 
9,291

Covenants not to compete
 
—

 
1,666

Accumulated amortization
 
(20,220
)
 
(42,025
)
Net intangibles
 
$
60,265

 
$
64,892


Aggregate amortization expense on amortizable intangible assets was $2.6 million and $3.5 million for the three months ended January 31, 2019 and 2018, respectively, and $5.5 million and $7.4 million for the six months ended January 31, 2019 and 2018, respectively. During the six months ended January 31, 2019, the Company retired fully amortized intangible assets of $28.0 million, which were no longer being utilized.
The change in the carrying amount of goodwill was as follows (in thousands):
Balance as of July 31, 2018
 
$
337,235

Effect of foreign currency exchange rates
 
810

Balance as of January 31, 2019
 
$
338,045