PROPERTY, PLANT AND EQUIPMENT (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Property, Plant and Equipment [Abstract]
Depreciation	$ 77,700	$ 66,200	$ 231,600	$ 193,400
Payments for capital projects			242,603	258,725
Transfer of property, plant and equipment			190,100	189,900
Property, Plant and Equipment [Line Items]
Proceeds from property disposals			21,715	15,168
Gain (loss) on property disposals			8,009	9,546
Idled assets, carrying amount	41,900		41,900
Idled assets, depreciable value	185,000		185,000
Idled assets, accumulated depreciation	143,100		143,100
Equipment
Property, Plant and Equipment [Line Items]
Proceeds from property disposals	11,800	13,400	21,700	15,200
Gain (loss) on property disposals	$ 6,400	$ (9,800)	$ 8,000	$ (9,500)