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Inventories (Tables)
6 Months Ended
Jun. 25, 2021
Inventory, Net [Abstract]  
Components of Inventories
Major components of inventories were as follows (in thousands):
June 25,
2021
December 25,
2020
Finished products and components$153,876 $133,122 
Products and components in various stages of completion95,695 83,791 
Raw materials and purchased components152,657 129,319 
Subtotal402,228 346,232 
Reduction to LIFO cost(64,703)(60,528)
Total$337,525 $285,704