PENSION AND OTHER POSTRETIREMENT BENEFITS - Schedule of Net Defined Benefit Pension and Other Postretirement Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Interest cost	$ 1,468	$ 1,366	$ 4,402	$ 4,097
Estimated return on plan assets	(1,349)	(1,516)	(4,047)	(4,549)
Settlement loss	1,134	0	3,064	0
Amortization of net loss	328	300	984	902
Net costs	1,581	150	4,403	450
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Interest cost	13	12	39	35
Estimated return on plan assets	0	0	0	0
Settlement loss	0	0	0	0
Amortization of net loss	0	0	0	0
Net costs	$ 13	$ 12	$ 39	$ 35