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Inventories
 6 Months Ended
Jun. 26, 2021
Inventory Disclosure [Abstract]  
Inventories Inventories
 
The components of inventories at June 26, 2021 and December 26, 2020 are as follows:
 
(in thousands)June 26, 2021December 26, 2020
Raw materials$111,769 $85,394 
Work in process106,552 92,783 
Finished goods142,777 114,641 
Inventory Reserves(35,324)(34,816)
Total$325,774 $258,002