BUSINESS REORGANIZATION EXPENSES LEASE TERMINATION PAYMENTS (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
Hudson Americas
Restructuring Cost and Reserve [Line Items]
Business reorganization	(82)	(39)	1,108
Hudson Asia Pacific
Restructuring Cost and Reserve [Line Items]
Business reorganization	1	248	669
Hudson Europe
Restructuring Cost and Reserve [Line Items]
Business reorganization	815	1,387	2,883
Corporate
Restructuring Cost and Reserve [Line Items]
Business reorganization	(22)	(16)	1,168
Facility Closing
Restructuring Cost and Reserve [Line Items]
Business reorganization	698	992	2,667
Facility Closing | Hudson Americas
Restructuring Cost and Reserve [Line Items]
Business reorganization	(105)	(16)	503
Facility Closing | Hudson Asia Pacific
Restructuring Cost and Reserve [Line Items]
Business reorganization	0	(24)	625
Facility Closing | Hudson Europe
Restructuring Cost and Reserve [Line Items]
Business reorganization	803	1,022	1,358
Facility Closing | Corporate
Restructuring Cost and Reserve [Line Items]
Business reorganization	$ 0	$ 10	$ 181