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Inventories
 3 Months Ended
Mar. 31, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories

(In thousands)
 
March 31,
2018
 
December 30, 2017
 
 
 
 
 
Raw materials and supplies
 
$
94,633

 
$
108,397

Work-in-process
 
63,254

 
46,158

Finished goods
 
178,115

 
180,143

Valuation reserves
 
(6,771
)
 
(6,797
)
 
 
 
 
 
Inventories
 
$
329,231

 
$
327,901