PROPERTY, PLANT AND EQUIPMENT (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2021	Mar. 29, 2020
Property, Plant and Equipment [Abstract]
Depreciation	$ 80,700	$ 74,500
Payments for capital projects	102,167	77,168
Transfer of property, plant and equipment	68,300	87,200
Property, Plant and Equipment [Line Items]
Proceeds from property disposals	13,074	632
Gain (loss) on property disposals	2,396	521
Idled assets, carrying amount	45,000
Idled assets, depreciable value	234,700
Idled assets, accumulated depreciation	189,700
Equipment
Property, Plant and Equipment [Line Items]
Proceeds from property disposals	13,100	600
Gain (loss) on property disposals	$ 2,400	$ (500)