RESTRUCTURING-RELATED ACTIVITIES - Schedule of Restructuring Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017
GNP
Restructuring Cost and Reserve [Line Items]
Beginning liability or reserve	$ 2,251
Restructuring charges incurred	692	$ 4,832
Payments and disposals	(2,707)	(2,581)
Ending liability or reserve	236	2,251
GNP | Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Beginning liability or reserve	800
Restructuring charges incurred	936	3,381
Payments and disposals	(1,500)	(2,581)
Ending liability or reserve	236	800
GNP | Inventory impairments
Restructuring Cost and Reserve [Line Items]
Beginning liability or reserve	699
Restructuring charges incurred	(227)	699
Payments and disposals	(472)	0
Ending liability or reserve	0	699
GNP | Other
Restructuring Cost and Reserve [Line Items]
Beginning liability or reserve	752
Restructuring charges incurred	(17)	752
Payments and disposals	(735)	0
Ending liability or reserve	0	752
40 North Foods
Restructuring Cost and Reserve [Line Items]
Beginning liability or reserve	0
Restructuring charges incurred	564	0
Payments and disposals	(478)	0
Ending liability or reserve	86	0
40 North Foods | Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Beginning liability or reserve	0
Restructuring charges incurred	449	0
Payments and disposals	(449)	0
Ending liability or reserve	0	0
40 North Foods | Other
Restructuring Cost and Reserve [Line Items]
Beginning liability or reserve	0
Restructuring charges incurred	115	0
Payments and disposals	(29)	0
Ending liability or reserve	$ 86	$ 0