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Inventories (Tables)
3 Months Ended
Apr. 01, 2022
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories on the Consolidated Balance Sheets are summarized as follows:
April 1,December 31,
(Thousands)20222021
Raw materials and supplies$106,625 $93,518 
Work in process228,194 221,638 
Finished goods52,173 45,959 
Inventories, net$386,992 $361,115