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Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]  
Components of inventories
Inventories consisted of the following:
 
September 30,
2018
 
December 31,
2017
Raw materials and parts
$
125,197

 
$
118,790

Work-in-progress
50,546

 
43,035

Finished goods
101,523

 
93,565

 
$
277,266

 
$
255,390
Components of other intangible assets
Other intangible assets consisted of the following:
 
September 30, 2018
 
December 31, 2017
 
Gross
Amount
 
Accumulated
Amortization
 
Intangibles, Net
 
Gross
Amount
 
Accumulated
Amortization
 
Intangibles, Net
Customer relationships
$
198,042

 
$
(48,173
)
 
$
149,869

 
$
198,527

 
$
(41,794
)
 
$
156,733

Proven technology and patents
74,732

 
(42,036
)
 
32,696

 
70,311

 
(38,890
)
 
31,421

Tradenames (finite life)
4,557

 
(2,904
)
 
1,653

 
4,518

 
(2,807
)
 
1,711

Tradenames (indefinite life)
35,536

 
—

 
35,536

 
35,562

 
—

 
35,562

Other
3,668

 
(2,518
)
 
1,150

 
3,490

 
(2,199
)
 
1,291

 
$
316,535

 
$
(95,631
)
 
$
220,904

 
$
312,408

 
$
(85,690
)
 
$
226,718