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Inventories
9 Months Ended
Sep. 26, 2020
Inventory Disclosure [Abstract]  
Inventories
4. Inventories
Inventories consist of the following (in thousands):
September 26,
2020
December 28,
2019
Raw materials$119,450 $55,913 
Work-in-process18,297 10,966 
Finished goods67,032 48,992 
     Total inventories$204,779 $115,871