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Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]  
Components of inventories
Inventories consisted of the following:
 
March 31,
2019
 
December 31,
2018
Raw materials and parts
$
128,100

 
$
122,945

Work-in-progress
50,911

 
47,098

Finished goods
103,076

 
98,778

 
$
282,087

 
$
268,821
Components of other intangible assets
Other intangible assets consisted of the following:
 
March 31, 2019
 
December 31, 2018
 
Gross
Amount
 
Accumulated
Amortization
 
Intangibles, Net
 
Gross
Amount
 
Accumulated
Amortization
 
Intangibles, Net
Customer relationships
$
197,916

 
$
(52,318
)
 
$
145,598

 
$
197,942

 
$
(49,887
)
 
$
148,055

Proven technology and patents
73,906

 
(43,518
)
 
30,388

 
73,880

 
(42,750
)
 
31,130

Tradename (finite life)
4,580

 
(2,914
)
 
1,666

 
4,504

 
(2,874
)
 
1,630

Tradename (indefinite life)
35,479

 
—

 
35,479

 
35,500

 
—

 
35,500

Other
3,708

 
(2,862
)
 
846

 
3,684

 
(2,691
)
 
993

 
$
315,589

 
$
(101,612
)
 
$
213,977

 
$
315,510

 
$
(98,202
)
 
$
217,308