SEGMENT AND GEOGRAPHIC DATA Geographic Data Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Segment Reporting Information [Line Items]
Revenue	$ 159,503		$ 163,587	$ 171,360	$ 165,678	$ 184,276		$ 187,873	$ 204,838	$ 200,590	$ 660,128	[1]	$ 777,577	[1]	$ 933,736	[1]
Long-lived assets, net of accumulated depreciation and amortization	15,873	[2]				22,158	[2]				15,873	[2]	22,158	[2]	20,029	[2]
Total assets	158,829					193,468					158,829		193,468		216,546
Net assets	74,385					106,541					74,385		106,541		107,357		93,278
Hudson Americas
Segment Reporting Information [Line Items]
Revenue											139,001		169,216		192,237
Long-lived assets, net of accumulated depreciation and amortization	1,509					2,230					1,509		2,230		2,557
Total assets	18,338					31,399					18,338		31,399		29,818
Hudson Asia Pacific
Segment Reporting Information [Line Items]
Revenue											232,748		288,235		359,147
Long-lived assets, net of accumulated depreciation and amortization	9,179					12,909					9,179		12,909		9,997
Total assets	55,234					72,517					55,234		72,517		81,161
Hudson Europe
Segment Reporting Information [Line Items]
Revenue											288,484		320,305		382,546
Long-lived assets, net of accumulated depreciation and amortization	3,492					5,048					3,492		5,048		4,939
Total assets	74,877					76,381					74,877		76,381		86,156
Corporate
Segment Reporting Information [Line Items]
Revenue											0		0		0
Long-lived assets, net of accumulated depreciation and amortization	1,693					1,971					1,693		1,971		2,536
Total assets	10,380					13,171					10,380		13,171		19,411
Inter- segment elimination
Segment Reporting Information [Line Items]
Revenue											(105)		(179)		(194)
Long-lived assets, net of accumulated depreciation and amortization	0					0					0		0		0
Total assets	0					0					0		0		0
United Kingdom
Segment Reporting Information [Line Items]
Revenue											187,413	[1]	210,933	[1]	258,766	[1]
Long-lived assets, net of accumulated depreciation and amortization	2,890	[2]				3,629	[2]				2,890	[2]	3,629	[2]	3,122	[2]
Net assets	21,479					26,750					21,479		26,750		29,290
Australia
Segment Reporting Information [Line Items]
Revenue											169,998	[1]	218,537	[1]	277,646	[1]
Long-lived assets, net of accumulated depreciation and amortization	5,838	[2]				9,015	[2]				5,838	[2]	9,015	[2]	5,972	[2]
Net assets	18,938					31,036					18,938		31,036		30,521
United States
Segment Reporting Information [Line Items]
Revenue											138,005	[1]	167,196	[1]	190,094	[1]
Long-lived assets, net of accumulated depreciation and amortization	3,171	[2]				4,152	[2]				3,171	[2]	4,152	[2]	5,067	[2]
Net assets	15,819					26,404					15,819		26,404		22,223
Continental Europe
Segment Reporting Information [Line Items]
Revenue											100,964	[1]	109,100	[1]	121,935	[1]
Long-lived assets, net of accumulated depreciation and amortization	593	[2]				1,411	[2]				593	[2]	1,411	[2]	1,805	[2]
Net assets	7,169					7,975					7,169		7,975		10,933
Other Asia Pacific
Segment Reporting Information [Line Items]
Revenue											62,750	[1]	69,791	[1]	83,172	[1]
Long-lived assets, net of accumulated depreciation and amortization	3,341	[2]				3,895	[2]				3,341	[2]	3,895	[2]	4,029	[2]
Net assets	10,791					14,122					10,791		14,122		14,028
Other Americas
Segment Reporting Information [Line Items]
Revenue											998	[1]	2,020	[1]	2,123	[1]
Long-lived assets, net of accumulated depreciation and amortization	40	[2]				56	[2]				40	[2]	56	[2]	34	[2]
Net assets	$ 189					$ 254					$ 189		$ 254		$ 362

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