STOCKHOLDERS' EQUITY (Schedule of Changes in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	$ 2,536,060	$ 2,019,585
Other comprehensive income (loss) before reclassifications	(100,738)	38,965
Amounts reclassified from accumulated other comprehensive loss to net income	1,025	(74)
Currency translation	(75)	17
Total other comprehensive income (loss), net of tax	(99,788)	38,908
Balance, end of period	2,476,491	2,144,500
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	(75,129)	(127,834)
Total other comprehensive income (loss), net of tax	(99,788)	38,908
Balance, end of period	(174,917)	(88,926)
Losses Related to Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	(1,108)	(55,770)
Other comprehensive income (loss) before reclassifications	(96,765)	37,442
Amounts reclassified from accumulated other comprehensive loss to net income	0	0
Currency translation	0	0
Total other comprehensive income (loss), net of tax	(96,765)	37,442
Balance, end of period	(97,873)	(18,328)
Unrealized Gains on Derivative Financial Instruments Classified as Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	(2,406)	(683)
Other comprehensive income (loss) before reclassifications	4,123	(915)
Amounts reclassified from accumulated other comprehensive loss to net income	742	(221)
Currency translation	(75)	17
Total other comprehensive income (loss), net of tax	4,790	(1,119)
Balance, end of period	2,384	(1,802)
Losses Related to Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	(71,615)	(71,463)
Other comprehensive income (loss) before reclassifications	(8,105)	2,421
Amounts reclassified from accumulated other comprehensive loss to net income	283	248
Currency translation	0	0
Total other comprehensive income (loss), net of tax	(7,822)	2,669
Balance, end of period	(79,437)	(68,794)
Unrealized Holding Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	0	82
Other comprehensive income (loss) before reclassifications	9	17
Amounts reclassified from accumulated other comprehensive loss to net income	0	(101)
Currency translation	0	0
Total other comprehensive income (loss), net of tax	9	(84)
Balance, end of period	$ 9	$ (2)