SEGMENT AND GEOGRAPHIC DATA Geographic Data Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenue	$ 163,587	[1]	$ 187,873	[1]	$ 500,624	[1]	$ 593,301	[1]
Long-lived assets, net of accumulated depreciation and amortization	18,448	[2]	22,850	[2]	18,448	[2]	22,850	[2]
Net assets	85,847		106,710		85,847		106,710		106,541
United Kingdon [Member]
Segment Reporting Information [Line Items]
Revenue	47,518	[1]	52,097	[1]	140,281	[1]	157,749	[1]
Long-lived assets, net of accumulated depreciation and amortization	3,837	[2]	3,413	[2]	3,837	[2]	3,413	[2]
Net assets	22,836		23,931		22,836		23,931
Australia [Member]
Segment Reporting Information [Line Items]
Revenue	41,450	[1]	55,449	[1]	129,680	[1]	172,096	[1]
Long-lived assets, net of accumulated depreciation and amortization	6,746	[2]	9,550	[2]	6,746	[2]	9,550	[2]
Net assets	25,446		30,073		25,446		30,073
United States
Segment Reporting Information [Line Items]
Revenue	34,540	[1]	38,461	[1]	108,615	[1]	128,033	[1]
Long-lived assets, net of accumulated depreciation and amortization	3,170	[2]	4,217	[2]	3,170	[2]	4,217	[2]
Net assets	17,456		27,030		17,456		27,030
Europe
Segment Reporting Information [Line Items]
Revenue	22,953	[1]	23,237	[1]	73,608	[1]	80,963	[1]
Long-lived assets, net of accumulated depreciation and amortization	1,204	[2]	1,528	[2]	1,204	[2]	1,528	[2]
Net assets	6,635		8,075		6,635		8,075
Asia Pacific
Segment Reporting Information [Line Items]
Revenue	16,824	[1]	17,988	[1]	47,664	[1]	52,735	[1]
Long-lived assets, net of accumulated depreciation and amortization	3,447	[2]	4,081	[2]	3,447	[2]	4,081	[2]
Net assets	13,202		17,088		13,202		17,088
Other Americas
Segment Reporting Information [Line Items]
Revenue	302	[1]	641	[1]	776	[1]	1,725	[1]
Long-lived assets, net of accumulated depreciation and amortization	44	[2]	61	[2]	44	[2]	61	[2]
Net assets	$ 272		$ 513		$ 272		$ 513

[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 intangibles. Corporate assets are included in the United States.