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Inventories
 3 Months Ended
Apr. 04, 2021
Inventory Disclosure [Abstract]  
Inventories Inventories
The following table presents the major classes of inventories as of April 4, 2021 and December 31, 2020, respectively:
April 4, 2021December 31, 2020
 (In thousands)
Raw materials$122,210 $106,514 
Work-in-process38,204 32,011 
Finished goods149,860 141,042 
Gross inventories310,274 279,567 
Excess and obsolete reserves(34,869)(32,269)
Net inventories$275,405 $247,298