SEGMENT AND GEOGRAPHIC DATA Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014 segments		Jun. 30, 2013		Dec. 31, 2013
Segment Reporting Information [Line Items]
Number of Reportable Segments					3
Revenue, from external customers	$ 167,365		$ 171,360		$ 329,226		$ 337,037
Inter-segment revenue	0		0		0		0
Total revenue	167,365	[1]	171,360	[1]	329,226	[1]	337,037	[1]
Gross margin, from external customer	62,811		60,504		120,341		117,180
Inter-segment gross margin	0		0		0		0
Gross margin	62,811		60,504		120,341		117,180
Business reorganization expenses (recovery)	1,117		1,249		1,231		3,231
EBITDA (loss)	(2,239)	[2]	(3,862)	[2]	(4,627)	[2]	(10,487)	[2]
Depreciation and amortization	1,514		1,656		3,002		3,304
Intercompany interest income (expense), net	0		0		0		0
Interest income (expense), net	(206)		(155)		(350)		(300)
Income (loss) before provision for income taxes	(3,959)		(5,673)		(7,979)		(14,091)
Accounts receivable, net	100,508		103,586		100,508		103,586		85,901
Long-lived assets, net of accumulated depreciation and amortization	16,902	[3]	18,737	[3]	16,902	[3]	18,737	[3]
Total assets	155,920		175,361		155,920		175,361		158,829
Hudson Americas
Segment Reporting Information [Line Items]
Revenue, from external customers	26,263		37,327		53,126		74,549
Inter-segment revenue	38		0		37		(1)
Total revenue	26,301		37,327		53,163		74,548
Gross margin, from external customer	7,066		9,245		13,731		17,389
Inter-segment gross margin	34		0		31		(2)
Gross margin	7,100		9,245		13,762		17,387
Business reorganization expenses (recovery)	3		325		93		308
EBITDA (loss)	(882)	[2]	386	[2]	(1,993)	[2]	(560)	[2]
Depreciation and amortization	202		249		426		501
Intercompany interest income (expense), net	0		0		0		0
Interest income (expense), net	(1)		(8)		(8)		(17)
Income (loss) before provision for income taxes	(1,085)		129		(2,427)		(1,078)
Accounts receivable, net	16,819		25,284		16,819		25,284
Long-lived assets, net of accumulated depreciation and amortization	1,453		1,913		1,453		1,913
Total assets	20,067		30,669		20,067		30,669
Hudson Asia Pacific
Segment Reporting Information [Line Items]
Revenue, from external customers	65,101		62,869		121,532		119,070
Inter-segment revenue	0		0		0		0
Total revenue	65,101		62,869		121,532		119,070
Gross margin, from external customer	24,519		24,276		45,430		45,768
Inter-segment gross margin	1		(18)		(67)		(43)
Gross margin	24,520		24,258		45,363		45,725
Business reorganization expenses (recovery)	1,114		0		1,115		102
EBITDA (loss)	(581)	[2]	223	[2]	(884)	[2]	(644)	[2]
Depreciation and amortization	803		826		1,548		1,657
Intercompany interest income (expense), net	0		(601)		0		(1,266)
Interest income (expense), net	(37)		(51)		(80)		(92)
Income (loss) before provision for income taxes	(1,421)		(1,255)		(2,512)		(3,659)
Accounts receivable, net	30,505		30,602		30,505		30,602
Long-lived assets, net of accumulated depreciation and amortization	10,762		10,690		10,762		10,690
Total assets	61,631		66,093		61,631		66,093
Hudson Europe
Segment Reporting Information [Line Items]
Revenue, from external customers	76,001		71,164		154,568		143,418
Inter-segment revenue	27		17		107		42
Total revenue	76,028		71,181		154,675		143,460
Gross margin, from external customer	31,226		26,983		61,180		54,023
Inter-segment gross margin	(35)		32		37		58
Gross margin	31,191		27,015		61,217		54,081
Business reorganization expenses (recovery)	0		556		23		2,427
EBITDA (loss)	1,621	[2]	(2,155)	[2]	2,773	[2]	(5,607)	[2]
Depreciation and amortization	372		420		729		825
Intercompany interest income (expense), net	(132)		(110)		(262)		(217)
Interest income (expense), net	(24)		10		(13)		17
Income (loss) before provision for income taxes	1,093		(2,675)		1,769		(6,632)
Accounts receivable, net	53,184		47,700		53,184		47,700
Long-lived assets, net of accumulated depreciation and amortization	3,292		4,485		3,292		4,485
Total assets	71,148		71,052		71,148		71,052
Corporate
Segment Reporting Information [Line Items]
Revenue, from external customers	0		0		0		0
Inter-segment revenue	0		0		0		0
Total revenue	0		0		0		0
Gross margin, from external customer	0		0		0		0
Inter-segment gross margin	0		0		0		0
Gross margin	0		0		0		0
Business reorganization expenses (recovery)	0		368		0		394
EBITDA (loss)	(2,397)	[2]	(2,316)	[2]	(4,523)	[2]	(3,676)	[2]
Depreciation and amortization	137		161		299		321
Intercompany interest income (expense), net	132		711		262		1,483
Interest income (expense), net	(144)		(106)		(249)		(208)
Income (loss) before provision for income taxes	(2,546)		(1,872)		(4,809)		(2,722)
Accounts receivable, net	0		0		0		0
Long-lived assets, net of accumulated depreciation and amortization	1,395		1,649		1,395		1,649
Total assets	3,074		7,547		3,074		7,547
Inter-segment elimination
Segment Reporting Information [Line Items]
Revenue, from external customers	0		0		0		0
Inter-segment revenue	(65)		(17)		(144)		(41)
Total revenue	(65)		(17)		(144)		(41)
Gross margin, from external customer	0		0		0		0
Inter-segment gross margin	0		(14)		(1)		(13)
Gross margin	0		(14)		(1)		(13)
Business reorganization expenses (recovery)	0		0		0		0
EBITDA (loss)	0	[2]	0	[2]	0	[2]	0	[2]
Depreciation and amortization	0		0		0		0
Intercompany interest income (expense), net	0		0		0		0
Interest income (expense), net	0		0		0		0
Income (loss) before provision for income taxes	0		0		0		0
Accounts receivable, net	0		0		0		0
Long-lived assets, net of accumulated depreciation and amortization	0		0		0		0
Total assets	$ 0		$ 0		$ 0		$ 0

[1] Revenue by geographic region disclosed above is net of any inter-segment revenue and, therefore, represents only revenue from external customers according to the location of the operating subsidiary.

[2] SEC") Regulation S-K 229.10(e)1(ii)(A) defines EBITDA as earnings before interest, taxes, depreciation and amortization. EBITDA is presented to provide additional information to investors about the Company's operations on a basis consistent with the measures that the Company uses to manage its operations and evaluate its performance. Management also uses this measurement to evaluate working capital requirements. EBITDA should not be considered in isolation or as a substitute for operating income and net income prepared in accordance with U.S. GAAP or as a measure of the Company's profitability.

[3] Comprised of property and equipment and intangibles. Corporate assets are included in the United States.