SEGMENT AND GEOGRAPHIC DATA Segment Information (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 USD ($) segments	Dec. 31, 2015 USD ($) Segment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments										3	3
Revenue, from external customers									$ 463,197			$ 581,192	$ 562,572
Revenue from Related Parties									0			0	0
Total revenue	$ 106,109	$ 110,028	$ 122,743	$ 124,317	$ 136,677	$ 149,278	$ 151,070	$ 144,167	463,197			581,192	562,572
Gross margin, from external customers									187,710			222,845	209,429
Inter-segment gross margin									0			0	0
Gross margin	44,439	$ 45,145	$ 50,222	$ 47,904	53,258	$ 55,687	$ 59,871	$ 54,029	187,710			222,845	209,429
Proceeds from Divestiture of Businesses									19,837			0	0
Business reorganization expenses (recovery)									5,828			3,789	5,440
Impairment of long-lived assets									0			662	1,336
EBITDA (loss) (a)									6,820			(11,725)	(20,471)
Depreciation and amortization									3,845			5,559	5,922
Intercompany interest income (expense), net									0			0	0
Interest income (expense), net									(722)			(661)	(554)
Income (loss) from continuing operations before provision for income taxes									2,253			(17,945)	(26,947)
Provision for (benefit from) income taxes from continuing operations									646			(2,159)	3,264
Accounts receivable, net	62,420				74,079				62,420	$ 62,420	$ 62,420	74,079	76,467
Long-lived assets, net of accumulated depreciation and amortization	9,951				11,842				9,951	9,951	9,951	11,842	14,040
Total assets	124,949				139,672				124,949	124,949	124,949	139,672	158,829
Hudson Americas
Segment Reporting Information [Line Items]
Revenue, from external customers									28,627			50,146	51,857
Revenue from Related Parties									41			60	(2)
Total revenue									28,668			50,206	51,855
Gross margin, from external customers									16,111			20,757	18,692
Inter-segment gross margin									25			35	(4)
Gross margin									16,136			20,792	18,688
Proceeds from Divestiture of Businesses									15,918			0	0
Business reorganization expenses (recovery)									1,108			94	448
Impairment of long-lived assets									0			0	0
EBITDA (loss) (a)									13,354			117	(717)
Depreciation and amortization									604			485	494
Intercompany interest income (expense), net									0			0	0
Interest income (expense), net									(342)			(90)	16
Income (loss) from continuing operations before provision for income taxes									12,408			(458)	(1,195)
Provision for (benefit from) income taxes from continuing operations									58			(2,201)	61
Accounts receivable, net	3,155				6,695				3,155	3,155	3,155	6,695	5,923
Long-lived assets, net of accumulated depreciation and amortization	36				860				36	36	36	860	604
Total assets	7,766				10,553				7,766	7,766	7,766	10,553	18,338
Hudson Asia Pacific
Segment Reporting Information [Line Items]
Revenue, from external customers									219,391			246,873	232,748
Revenue from Related Parties									0			0	0
Total revenue									219,391			246,873	232,748
Gross margin, from external customers									89,682			93,014	87,162
Inter-segment gross margin									(477)			(143)	(71)
Gross margin									89,205			92,871	87,091
Proceeds from Divestiture of Businesses									0			0	0
Business reorganization expenses (recovery)									669			1,322	989
Impairment of long-lived assets									0			314	257
EBITDA (loss) (a)									2,851			(890)	(3,227)
Depreciation and amortization									1,951			3,287	3,192
Intercompany interest income (expense), net									0			0	(1,254)
Interest income (expense), net									(276)			(199)	(183)
Income (loss) from continuing operations before provision for income taxes									624			(4,376)	(7,856)
Provision for (benefit from) income taxes from continuing operations									776			11	3,489
Accounts receivable, net	29,824				26,745				29,824	29,824	29,824	26,745	24,647
Long-lived assets, net of accumulated depreciation and amortization	7,382				8,227				7,382	7,382	7,382	8,227	9,179
Total assets	49,246				54,141				49,246	49,246	49,246	54,141	55,234
Hudson Europe
Segment Reporting Information [Line Items]
Revenue, from external customers									215,179			284,173	277,967
Revenue from Related Parties									498			198	107
Total revenue									215,677			284,371	278,074
Gross margin, from external customers									81,917			109,074	103,575
Inter-segment gross margin									451			108	87
Gross margin									82,368			109,182	103,662
Proceeds from Divestiture of Businesses									3,919			0	0
Business reorganization expenses (recovery)									2,883			1,407	3,214
Impairment of long-lived assets									0			348	1,079
EBITDA (loss) (a)									(207)			(1,187)	(9,197)
Depreciation and amortization									802			1,247	1,592
Intercompany interest income (expense), net									(526)			(439)	(532)
Interest income (expense), net									(94)			(37)	27
Income (loss) from continuing operations before provision for income taxes									(1,629)			(2,910)	(11,294)
Provision for (benefit from) income taxes from continuing operations									(176)			35	(415)
Accounts receivable, net	29,441				40,639				29,441	29,441	29,441	40,639	45,897
Long-lived assets, net of accumulated depreciation and amortization	1,859				2,171				1,859	1,859	1,859	2,171	3,494
Total assets	53,557				65,105				53,557	53,557	53,557	65,105	74,877
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
Proceeds from Divestiture of Businesses									0			0	0
Business reorganization expenses (recovery)									1,168			966	789
Impairment of long-lived assets									0			0	0
EBITDA (loss) (a)									(9,178)			(9,765)	(7,330)
Depreciation and amortization									488			540	644
Intercompany interest income (expense), net									526			439	1,784
Interest income (expense), net									(10)			(335)	(414)
Income (loss) from continuing operations before provision for income taxes									(9,150)			(10,201)	(6,604)
Provision for (benefit from) income taxes from continuing operations									(12)			(4)	129
Accounts receivable, net	0				0				0	0	0	0	0
Long-lived assets, net of accumulated depreciation and amortization	674				584				674	674	674	584	763
Total assets	14,380				9,873				14,380	14,380	14,380	9,873	10,380
Inter- segment elimination
Segment Reporting Information [Line Items]
Revenue, from external customers									0			0	0
Revenue from Related Parties									(539)			(258)	(105)
Total revenue									(539)			(258)	(105)
Gross margin, from external customers									0			0	0
Inter-segment gross margin									1			0	(12)
Gross margin									1			0	(12)
Proceeds from Divestiture of Businesses												0	0
Business reorganization expenses (recovery)									0			0	0
Impairment of long-lived assets									0			0	0
EBITDA (loss) (a)									0			0	0
Depreciation and amortization									0			0	0
Intercompany interest income (expense), net									0			0	2
Interest income (expense), net									0			0	0
Income (loss) from continuing operations before provision for income taxes									0			$ 0	2
Provision for (benefit from) income taxes from continuing operations									0				0
Accounts receivable, net	0				0				0	0	0	$ 0	0
Long-lived assets, net of accumulated depreciation and amortization	0				0				0	0	0	0	0
Total assets	$ 0				$ 0				$ 0	$ 0	$ 0	$ 0	$ 0