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Inventories (Tables)
12 Months Ended
Dec. 26, 2020
Inventory Disclosure [Abstract]  
Inventories
(In thousands)20202019
Raw materials and supplies$85,927 $85,769 
Work-in-process49,361 48,814 
Finished goods186,785 163,842 
Valuation reserves(7,071)(6,318)
Inventories$315,002 $292,107