BUSINESS REORGANIZATION EXPENSES EMPLOYMENT TERMINATION BENEFITS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	$ 7,782	$ 720	$ 1,694
Hudson Americas
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	1,007	0	307
Hudson Asia Pacific
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	1,285	0	(15)
Hudson Europe
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	5,131	720	1,402
Corporate
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	359	0	0
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	4,383	0	223
Employee termination benefits | Hudson Americas
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	811	0	173
Employee termination benefits | Hudson Asia Pacific
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	674	0	(17)
Employee termination benefits | Hudson Europe
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	2,539	0	67
Employee termination benefits | Corporate
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	$ 359	$ 0	$ 0