PENSION AND OTHER POSTRETIREMENT BENEFITS (Schedule of Net Periodic Benefit Cost (Income)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Interest cost	$ 6,673	$ 5,463	$ 5,571
Estimated return on plan assets	(6,921)	(6,065)	(5,254)
Settlement loss (gain)	3,538	0	0
Other	(62)	0	0
Amortization of net loss	1,313	1,203	932
Net cost	4,541	601	1,249
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Interest cost	52	46	51
Estimated return on plan assets	0	0	0
Settlement loss (gain)	7	(3)	2
Other	0	0	0
Amortization of net loss	0	0	0
Net cost	$ 59	$ 43	$ 53