BUSINESS REORGANIZATION EXPENSES EMPLOYMENT TERMINATION BENEFITS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Business reorganization	$ 1,580	$ 5,828	$ 3,789
Hudson Americas
Restructuring Cost and Reserve [Line Items]
Business reorganization	(39)	1,108	94
Hudson Asia Pacific
Restructuring Cost and Reserve [Line Items]
Business reorganization	248	669	1,322
Hudson Europe
Restructuring Cost and Reserve [Line Items]
Business reorganization	1,387	2,883	1,407
Corporate
Restructuring Cost and Reserve [Line Items]
Business reorganization	(16)	1,168	966
One-time Termination Benefits
Restructuring Cost and Reserve [Line Items]
Business reorganization	316	2,109	2,765
One-time Termination Benefits | Hudson Americas
Restructuring Cost and Reserve [Line Items]
Business reorganization	(8)	350	3
One-time Termination Benefits | Hudson Asia Pacific
Restructuring Cost and Reserve [Line Items]
Business reorganization	273	(2)	510
One-time Termination Benefits | Hudson Europe
Restructuring Cost and Reserve [Line Items]
Business reorganization	77	792	1,285
One-time Termination Benefits | Corporate
Restructuring Cost and Reserve [Line Items]
Business reorganization	(26)	969	967
2015 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Business reorganization	$ 1,098	$ 0	$ 0