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Inventories, Net
 3 Months Ended
Mar. 27, 2021
Inventory Disclosure [Abstract]  
Inventories, Net INVENTORIES, NET
Inventories are summarized as follows:
March 27,
2021		December 26,
2020
Raw materials$33,877 $31,167 
Work-in-process15,653 13,305 
Finished goods61,826 59,271 
Supplies and other169 167 
LIFO reserve(21,817)(18,511)
Inventories, net$89,708 $85,399