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Inventories (Tables)
 9 Months Ended
Sep. 30, 2016
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following: 
 
September 30, 2016
 
December 31, 2015
Raw materials
$
46,297

 
$
52,647

Work in process
8,222

 
8,776

Finished goods
13,424

 
14,235

 
$
67,943

 
$
75,658