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Property, Plant, and Equipment, Net (Tables)
12 Months Ended
Dec. 26, 2020
Property, Plant and Equipment [Abstract]  
Property, plant, and equipment, net
(In thousands)20202019
Land and land improvements$33,602 $31,987 
Buildings218,319 203,762 
Machinery and equipment658,613 640,642 
Construction in progress28,631 18,920 
 939,165 895,311 
Less accumulated depreciation(562,593)(532,183)
Property, plant, and equipment, net$376,572 $363,128