RESTRUCTURING-RELATED ACTIVITIES (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	$ 7,701
GNP
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	6,999	$ 7,000
Expected future payments for restructuring		$ 5,400
40 North Foods
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	702
Expected future payments for restructuring	$ 600