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Inventories
 6 Months Ended
Jun. 30, 2015
Inventories [Abstract]  
Inventories
6.Inventories

The components of inventory were as follows (in thousands):
 
 
 
June 30,
2015
  
December 31,
2014
 
Raw materials and supplies
 
$
127,879
  
$
124,103
 
Work in process
  
26,676
   
29,358
 
Finished products
  
75,850
   
79,184
 
Inventory reserves
  
(33,379
)
  
(38,879
)
 
 
$
197,026
  
$
193,766