Inventories (Tables)
 12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Inventories
Inventories, net of reserves, as of December 31, 2016 and 2015 consist of the following (in thousands):
 
 
2016
 
2015
Finished goods
$
68,701

 
$
60,803

Raw materials
56,270

 
54,005

Work in process
10,673

 
11,595

 
$
135,644

 
$
126,403