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Inventories (Tables)
 12 Months Ended
Dec. 27, 2014
Inventories [Abstract]  
Inventories
(In thousands)
 
2014
  
2013
 
         
Raw materials and supplies
 
$
53,586
  
$
54,613
 
Work-in-process
  
39,707
   
43,796
 
Finished goods
  
168,481
   
159,422
 
Valuation reserves
  
(5,189
)
  
(6,115
)
         
Inventories
 
$
256,585
  
$
251,716