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Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2020
Accounting Policies [Abstract]  
Components of inventories
Inventories consisted of the following:
 
March 31,
2020
 
December 31,
2019
Raw materials and parts
$
133,634

 
$
129,294

Work-in-progress
49,583

 
43,202

Finished goods
108,893

 
101,789

 
$
292,110

 
$
274,285
Components of other intangible assets
Other intangible assets consisted of the following:
 
March 31, 2020
 
December 31, 2019
 
Gross
Amount
 
Accumulated
Amortization
 
Intangibles, Net
 
Gross
Amount
 
Accumulated
Amortization
 
Intangibles, Net
Customer relationships
$
199,969

 
$
(60,750
)
 
$
139,219

 
$
197,764

 
$
(58,851
)
 
$
138,913

Proven technology and patents
75,791

 
(47,789
)
 
28,002

 
75,170

 
(46,532
)
 
28,638

Tradename (finite life)
4,586

 
(3,154
)
 
1,432

 
4,594

 
(3,124
)
 
1,470

Tradename (indefinite life)
35,465

 
—

 
35,465

 
35,474

 
—

 
35,474

Other
5,703

 
(4,126
)
 
1,577

 
5,462

 
(3,715
)
 
1,747

 
$
321,514

 
$
(115,819
)
 
$
205,695

 
$
318,464

 
$
(112,222
)
 
$
206,242