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Goodwill and Intangible Assets
 9 Months Ended
Apr. 30, 2019
Text Block [Abstract]  
Goodwill and Intangible Assets
Other Intangible Assets
Other intangible assets include patents, trademarks, and customer relationships with finite lives being amortized in accordance with the accounting guidance for other intangible assets. The Company also has unamortized indefinite-lived trademarks that are classified as other intangible assets.
The net book value of these assets was as follows:
 
April 30, 2019
 
July 31, 2018
 
Weighted
Average
Amortization
Period
(Years)
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net Book
Value
 
Weighted
Average
Amortization
Period
(Years)
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net Book
Value
Amortized other intangible assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
      Customer relationships and other
8
 
$
52,203

 
$
(33,487
)
 
$
18,716

 
9
 
$
61,944

 
$
(38,872
)
 
$
23,072

Unamortized other intangible assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Trademarks
N/A
 
19,419

 
—

 
19,419

 
N/A
 
19,516

 
—

 
19,516

Total
 
 
$
71,622

 
$
(33,487
)
 
$
38,135

 
 
 
$
81,460

 
$
(38,872
)
 
$
42,588


Amortization expense of intangible assets was $1,443 and $1,620 for the three months ended April 30, 2019 and 2018, respectively, and $4,314 and $4,930 for the nine months ended April 30, 2019 and 2018, respectively. The amortization over each of the next five fiscal years is projected to be $5,708, $5,183, $5,144, $5,002 and $2,025 for the fiscal years ending July 31, 2019, 2020, 2021, 2022 and 2023, respectively.