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Inventories (Tables)
 3 Months Ended
Mar. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventories Inventories included in the Condensed Consolidated Balance Sheets consisted of the following (in thousands):
 
March 30,
2019
 
December 29,
2018
 
Finished products
$
108,590

 
$
97,398

Materials and work in process
95,927

 
94,161

LIFO allowance
(33,928
)
 
(34,381
)
Total inventories
$
170,589

 
$
157,178