BUSINESS REORGANIZATION EXPENSES OTHER ASSOCIATED COSTS (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
Other associated costs
Restructuring Cost and Reserve [Line Items]
Business reorganization	25	272	1,052
Other associated costs | Hudson Americas
Restructuring Cost and Reserve [Line Items]
Business reorganization	0	(15)	255
Other associated costs | Hudson Asia Pacific
Restructuring Cost and Reserve [Line Items]
Business reorganization	0	0	47
Other associated costs | Hudson Europe
Restructuring Cost and Reserve [Line Items]
Business reorganization	25	287	733
Other associated costs | Corporate
Restructuring Cost and Reserve [Line Items]
Business reorganization	$ 0	$ 0	$ 17