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Inventories
 9 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories

Inventories consist of the following:
 
September 30,
2018
 
December 31,
2017
Raw materials
$
43,474

 
$
41,844

Work-in-process
15,837

 
14,666

Finished goods
94,307

 
84,926

Total
$
153,618

 
$
141,436