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Inventories (Tables)
6 Months Ended
Jun. 26, 2021
Inventory Disclosure [Abstract]  
Inventories
(In thousands)June 26,
2021
December 26,
2020
Raw materials and supplies$122,931 $85,927 
Work-in-process73,336 49,361 
Finished goods197,006 186,785 
Valuation reserves(8,291)(7,071)
Inventories$384,982 $315,002