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Intangibles and Goodwill (Tables)
 3 Months Ended
Oct. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of intangible assets
The Company’s intangible assets consist of the following:
 
October 31, 2017
 
July 31, 2017
 
Gross
 
Accumulated Amortization
 
Net
 
Gross
 
Accumulated Amortization
 
Net
Intangible assets with finite lives:
 

 
 

 
 

 
 
 
 
 
 
Customer relationships
$
131,810

 
$
(37,403
)
 
$
94,407

 
$
119,576

 
$
(34,773
)
 
$
84,803

Technology(1)
44,744

 
(15,931
)
 
28,813

 
39,064

 
(15,260
)
 
23,804

Brand names
8,210

 
(3,426
)
 
4,784

 
8,188

 
(3,225
)
 
4,963

Non-compete agreements
3,092

 
(1,487
)
 
1,605

 
3,092

 
(1,428
)
 
1,664

Patents and other registrations
2,801

 
(1,092
)
 
1,709

 
2,783

 
(1,053
)
 
1,730

 
190,657

 
(59,339
)
 
131,318

 
172,703

 
(55,739
)
 
116,964

Trademarks and tradenames
7,519

 
—

 
7,519

 
7,548

 
—

 
7,548

Total intangible assets
$
198,176

 
$
(59,339
)
 
$
138,837

 
$
180,251

 
$
(55,739
)
 
$
124,512

_______________________________________________
(1)
The gross and accumulated amortization amounts previously reported as of July 31, 2017 have been revised to exclude the $3,730 fully amortized technology related intangible asset and associated accumulated amortization related to the Jet Prep business. This did not result in any change to the net technology related intangible asset as of July 31, 2017.
Schedule of changes in goodwill
Goodwill changed during the three months ended October 31, 2017 as follows:
 
Endoscopy
 
Water Purification and Filtration
 
Healthcare Disposables
 
Dialysis
 
Total
Goodwill
Balance, July 31, 2017
129,945

 
59,088

 
114,279

 
8,133

 
311,445

Acquisitions
41,509

 
—

 
—

 
—

 
41,509

Foreign currency translation
(968
)
 
(168
)
 
—

 
—

 
(1,136
)
Balance, October 31, 2017
$
170,486

 
$
58,920

 
$
114,279

 
$
8,133

 
$
351,818