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Inventories
 6 Months Ended
Jun. 27, 2020
Inventory Disclosure [Abstract]  
Inventories Inventories
 
The components of inventories at June 27, 2020 and December 28, 2019 are as follows:
 
(in thousands)June 27, 2020December 28, 2019
Raw materials$82,133  $76,732  
Work in process92,681  84,561  
Finished goods106,904  110,388  
Inventory Reserves(33,698) (34,174) 
Total$248,020  $237,507