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Inventories (Tables)
 9 Months Ended
Oct. 01, 2016
Inventories [Abstract]  
Inventories
(In thousands)
 
October 1, 2016
  
December 26, 2015
 
    
       
Raw materials and supplies
 
$
63,915
  
$
58,987
 
Work-in-process
  
37,131
   
25,161
 
Finished goods
  
157,128
   
161,410
 
Valuation reserves
  
(7,044
)
  
(6,180
)
         
Inventories
 
$
251,130
  
$
239,378