PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Long-lived assets
Property, plant and equipment, at cost	$ 1,245,261	$ 1,160,865
Land and improvements
Long-lived assets
Property, plant and equipment, at cost	111,091	99,797
Buildings and improvements
Long-lived assets
Property, plant and equipment, at cost	364,396	348,836
Machinery and equipment
Long-lived assets
Property, plant and equipment, at cost	584,447	549,311
Transportation equipment
Long-lived assets
Property, plant and equipment, at cost	23,650	24,380
Office furniture and equipment
Long-lived assets
Property, plant and equipment, at cost	85,130	85,239
Construction in progress
Long-lived assets
Property, plant and equipment, at cost	$ 76,547	$ 53,302