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Inventories (Tables)
 12 Months Ended
Dec. 31, 2015
Inventories [Abstract]  
Inventories
The components of inventories at December 31 were as follows (in thousands):

 
 
2015
  
2014
 
Raw materials and supplies
 
$
120,811
  
$
124,103
 
Work in process
  
22,979
   
29,358
 
Finished products
  
80,118
   
79,184
 
Inventory reserves
  
(34,040
)
  
(38,879
)
 
 
$
189,868
  
$
193,766