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Intangibles and Goodwill (Tables)
 9 Months Ended
Apr. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of intangible assets
Our intangible assets consist of the following:
 
April 30, 2019
 
July 31, 2018
 
Gross
 
Accumulated Amortization
 
Net
 
Gross
 
Accumulated Amortization
 
Net
Intangible assets with finite lives:
 

 
 

 
 

 
 
 
 
 
 
Customer relationships(1)
$
144,003

 
$
(49,042
)
 
$
94,961

 
$
133,347

 
$
(45,618
)
 
$
87,729

Technology(1)
59,652

 
(21,722
)
 
37,930

 
54,585

 
(19,836
)
 
34,749

Brand names(1)
8,462

 
(3,116
)
 
5,346

 
8,141

 
(3,857
)
 
4,284

Non-compete agreements(1)
2,880

 
(1,604
)
 
1,276

 
3,060

 
(1,628
)
 
1,432

Patents and other registrations
3,103

 
(1,236
)
 
1,867

 
2,826

 
(1,179
)
 
1,647

 
218,100

 
(76,720
)
 
141,380

 
201,959

 
(72,118
)
 
129,841

Trademarks and tradenames
6,695

 
—

 
6,695

 
7,520

 
—

 
7,520

Total intangible assets
$
224,795

 
$
(76,720
)
 
$
148,075

 
$
209,479

 
$
(72,118
)
 
$
137,361

_______________________________________________
(1)
During the nine months ended April 30, 2019, we wrote off $10,127 of fully amortized intangible assets.
Schedule of changes in goodwill
Goodwill changed during the nine months ended April 30, 2019 as follows:
 
Medical
 
Life Sciences
 
Dental
 
Dialysis
 
Total
Goodwill
Balance, July 31, 2018
$
186,690

 
$
58,925

 
$
114,279

 
$
8,133

 
$
368,027

Acquisitions
—

 
6,137

 
9,101

 
—

 
15,238

Divestitures
—

 
(491
)
 
—

 
—

 
(491
)
Foreign currency translation
(4,244
)
 
(176
)
 
(210
)
 
—

 
(4,630
)
Balance, April 30, 2019
$
182,446

 
$
64,395

 
$
123,170

 
$
8,133

 
$
378,144