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Inventories (Tables)
 12 Months Ended
Dec. 31, 2016
Inventories [Abstract]  
Inventories
(In thousands)
 
2016
  
2015
 
 
      
Raw materials and supplies
 
$
57,387
  
$
58,987
 
Work-in-process
  
42,227
   
25,161
 
Finished goods
  
149,288
   
161,410
 
Valuation reserves
  
(6,889
)
  
(6,180
)
 
        
Inventories
 
$
242,013
  
$
239,378