SEGMENT AND GEOGRAPHIC DATA Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014 Segment		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of reportable segments											3
Revenue, from external customers											$ 581,192		$ 562,572		$ 655,875
Revenue from Related Parties											0		0		0
Total revenue	136,677		149,278	151,070	144,167	139,999		139,287	145,383	137,903	581,192	[1]	562,572	[1]	655,875	[1]
Gross margin, from external customers											222,845		209,429		257,793
Inter-segment gross margin											0		0		0
Gross margin	53,258		55,687	59,871	54,029	52,838		50,491	55,106	50,994	222,845		209,429		257,793
Business reorganization expenses (recovery)											3,789		5,440		7,506
Impairment of long-lived assets											662		1,336		0
EBITDA (loss) (a)											(11,725)	[2]	(20,471)	[2]	(3,788)	[2]
Depreciation and amortization											5,559		5,922		5,982
Intercompany interest income (expense), net											0		0		0
Interest income (expense), net											(661)		(554)		(561)
Income (loss) from continuing operations before provision for income taxes											(17,945)		(26,947)		(10,331)
Provision for (benefit from) income taxes from continuing operations											(2,159)		3,264		(3,109)
Accounts receivable, net	74,079					76,467					74,079		76,467		88,592
Long-lived assets, net of accumulated depreciation and amortization	11,842	[3]				14,040	[3]				11,842	[3]	14,040	[3]	19,556	[3]
Total assets	139,672					158,829					139,672		158,829		193,468
Hudson Americas
Segment Reporting Information [Line Items]
Revenue, from external customers											50,146		51,857		60,015
Revenue from Related Parties											60		(2)		0
Total revenue											50,206		51,855		60,015
Gross margin, from external customers											20,757		18,692		22,026
Inter-segment gross margin											35		(4)		(14)
Gross margin											20,792		18,688		22,012
Business reorganization expenses (recovery)											94		448		877
Impairment of long-lived assets											0		0		0
EBITDA (loss) (a)											117	[2]	(717)	[2]	(1,124)	[2]
Depreciation and amortization											485		494		694
Intercompany interest income (expense), net											0		0		0
Interest income (expense), net											(90)		16		11
Income (loss) from continuing operations before provision for income taxes											(458)		(1,195)		(1,807)
Provision for (benefit from) income taxes from continuing operations											(2,201)		61		(3,858)
Accounts receivable, net	6,695					5,923					6,695		5,923		8,040
Long-lived assets, net of accumulated depreciation and amortization	860					604					860		604		966
Total assets	10,553					18,338					10,553		18,338		31,399
Hudson Asia Pacific
Segment Reporting Information [Line Items]
Revenue, from external customers											246,873		232,748		288,144
Revenue from Related Parties											0		0		117
Total revenue											246,873		232,748		288,261
Gross margin, from external customers											93,014		87,162		117,428
Inter-segment gross margin											(143)		(71)		12
Gross margin											92,871		87,091		117,440
Business reorganization expenses (recovery)											1,322		989		1,285
Impairment of long-lived assets											314		257		0
EBITDA (loss) (a)											(890)	[2]	(3,227)	[2]	5,354	[2]
Depreciation and amortization											3,287		3,192		3,197
Intercompany interest income (expense), net											0		(1,254)		(3,988)
Interest income (expense), net											(199)		(183)		(235)
Income (loss) from continuing operations before provision for income taxes											(4,376)		(7,856)		(2,066)
Provision for (benefit from) income taxes from continuing operations											11		3,489		(527)
Accounts receivable, net	26,745					24,647					26,745		24,647		32,835
Long-lived assets, net of accumulated depreciation and amortization	8,227					9,179					8,227		9,179		12,909
Total assets	54,141					55,234					54,141		55,234		72,517
Hudson Europe
Segment Reporting Information [Line Items]
Revenue, from external customers											284,173		277,967		307,716
Revenue from Related Parties											198		107		86
Total revenue											284,371		278,074		307,802
Gross margin, from external customers											109,074		103,575		118,339
Inter-segment gross margin											108		87		2
Gross margin											109,182		103,662		118,341
Business reorganization expenses (recovery)											1,407		3,214		4,986
Impairment of long-lived assets											348		1,079		0
EBITDA (loss) (a)											(1,187)	[2]	(9,197)	[2]	(4,406)	[2]
Depreciation and amortization											1,247		1,592		1,450
Intercompany interest income (expense), net											(439)		(532)		(435)
Interest income (expense), net											(37)		27		57
Income (loss) from continuing operations before provision for income taxes											(2,910)		(11,294)		(6,234)
Provision for (benefit from) income taxes from continuing operations											35		(415)		858
Accounts receivable, net	40,639					45,897					40,639		45,897		47,717
Long-lived assets, net of accumulated depreciation and amortization	2,171					3,494					2,171		3,494		5,046
Total assets	65,105					74,877					65,105		74,877		76,381
Corporate
Segment Reporting Information [Line Items]
Revenue, from external customers											0		0		0
Revenue from Related Parties											0		0		0
Total revenue											0		0		0
Gross margin, from external customers											0		0		0
Inter-segment gross margin											0		0		0
Gross margin											0		0		0
Business reorganization expenses (recovery)											966		789		358
Impairment of long-lived assets											0		0		0
EBITDA (loss) (a)											(9,765)	[2]	(7,330)	[2]	(3,612)	[2]
Depreciation and amortization											540		644		641
Intercompany interest income (expense), net											439		1,784		4,424
Interest income (expense), net											(335)		(414)		(394)
Income (loss) from continuing operations before provision for income taxes											(10,201)		(6,604)		(223)
Provision for (benefit from) income taxes from continuing operations											(4)		129		418
Accounts receivable, net	0					0					0		0		0
Long-lived assets, net of accumulated depreciation and amortization	584					763					584		763		635
Total assets	9,873					10,380					9,873		10,380		13,171
Inter- segment elimination
Segment Reporting Information [Line Items]
Revenue, from external customers											0		0		0
Revenue from Related Parties											(258)		(105)		(203)
Total revenue											(258)		(105)		(203)
Gross margin, from external customers											0		0		0
Inter-segment gross margin											0		(12)		0
Gross margin											0		(12)		0
Business reorganization expenses (recovery)											0		0		0
Impairment of long-lived assets											0		0		0
EBITDA (loss) (a)											0	[2]	0	[2]	0	[2]
Depreciation and amortization											0		0		0
Intercompany interest income (expense), net											0		2		(1)
Interest income (expense), net											0		0		0
Income (loss) from continuing operations before provision for income taxes											0		2		(1)
Provision for (benefit from) income taxes from continuing operations											0		0		0
Accounts receivable, net	0					0					0		0		0
Long-lived assets, net of accumulated depreciation and amortization	0					0					0		0		0
Total assets	$ 0					$ 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 goodwill, net of accumulated depreciation and amortization. Corporate assets are included in the United States.