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Inventories
 3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories are as follows (in thousands):
 
March 31, 2017
 
December 31, 2016
Raw materials
$
31,637

 
$
28,626

Work-in-process
3,013

 
2,918

Finished goods
30,027

 
26,739

Inventories
$
64,677

 
$
58,283