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Inventories (Tables)
9 Months Ended
Sep. 30, 2017
Inventory Disclosure [Abstract]  
Components of Inventory
Inventories consist of the following (in thousands):
 
September 30,
2017
 
December 31,
2016
Raw materials
$
42,023

 
$
32,647

Work-in-process
8,217

 
7,701

Finished goods
48,838

 
32,194

     Total inventories
$
99,078

 
$
72,542