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Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2019
Accounting Policies [Abstract]  
Components of inventories
Inventories consisted of the following:
 
September 30,
2019
 
December 31,
2018
Raw materials and parts
$
128,371

 
$
122,945

Work-in-progress
45,843

 
47,098

Finished goods
106,764

 
98,778

 
$
280,978

 
$
268,821
Components of other intangible assets
Other intangible assets consisted of the following:
 
September 30, 2019
 
December 31, 2018
 
Gross
Amount
 
Accumulated
Amortization
 
Intangibles, Net
 
Gross
Amount
 
Accumulated
Amortization
 
Intangibles, Net
Customer relationships
$
197,467

 
$
(56,508
)
 
$
140,959

 
$
197,942

 
$
(49,887
)
 
$
148,055

Proven technology and patents
75,482

 
(46,076
)
 
29,406

 
73,880

 
(42,750
)
 
31,130

Tradenames (finite life)
4,482

 
(2,981
)
 
1,501

 
4,504

 
(2,874
)
 
1,630

Tradenames (indefinite life)
35,442

 
—

 
35,442

 
35,500

 
—

 
35,500

Other
5,455

 
(3,392
)
 
2,063

 
3,684

 
(2,691
)
 
993

 
$
318,328

 
$
(108,957
)
 
$
209,371

 
$
315,510

 
$
(98,202
)
 
$
217,308