BUSINESS REORGANIZATION EXPENSES REORGANIZATION EXPENSES BY PLAN (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Business reorganization	$ 712	$ 1,580	$ 5,828
Previous Years Reorganization Plan [Member]
Restructuring Cost and Reserve [Line Items]
Business reorganization	$ 712	$ 1,580	$ 5,828