PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	Dec. 25, 2021	Dec. 26, 2020
Long-lived assets
Property, plant and equipment, at cost	$ 1,422,101	$ 1,341,380
Land and improvements
Long-lived assets
Property, plant and equipment, at cost	112,236	114,831
Buildings and improvements
Long-lived assets
Property, plant and equipment, at cost	413,884	373,271
Machinery and equipment
Long-lived assets
Property, plant and equipment, at cost	672,319	616,765
Transportation equipment
Long-lived assets
Property, plant and equipment, at cost	27,020	28,610
Office furniture and equipment
Long-lived assets
Property, plant and equipment, at cost	117,757	101,487
Construction in progress
Long-lived assets
Property, plant and equipment, at cost	$ 78,885	$ 106,416