SEGMENT AND GEOGRAPHIC DATA Geographic Data Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 149,278	[1]	$ 139,287	[1]	$ 444,515	[1]	$ 422,573	[1]
Long-lived assets, net of accumulated depreciation and amortization	14,054	[2]	16,470	[2]	14,054	[2]	16,470	[2]
Net assets	58,287		85,847		58,287		85,847		74,385
United Kingdon [Member]
Segment Reporting Information [Line Items]
Revenue	45,959	[1]	45,975	[1]	139,348	[1]	134,289	[1]
Long-lived assets, net of accumulated depreciation and amortization	2,269	[2]	3,837	[2]	2,269	[2]	3,837	[2]
Net assets	15,072		22,836		15,072		22,836
Australia [Member]
Segment Reporting Information [Line Items]
Revenue	50,556	[1]	41,450	[1]	142,141	[1]	129,680	[1]
Long-lived assets, net of accumulated depreciation and amortization	6,306	[2]	6,746	[2]	6,306	[2]	6,746	[2]
Net assets	15,949		25,446		15,949		25,446
United States
Segment Reporting Information [Line Items]
Revenue	12,849	[1]	12,459	[1]	37,836	[1]	38,734	[1]
Long-lived assets, net of accumulated depreciation and amortization	1,707	[2]	1,189	[2]	1,707	[2]	1,189	[2]
Net assets	8,630		17,456		8,630		17,456
Europe
Segment Reporting Information [Line Items]
Revenue	23,293	[1]	22,277	[1]	78,208	[1]	71,431	[1]
Long-lived assets, net of accumulated depreciation and amortization	378	[2]	1,204	[2]	378	[2]	1,204	[2]
Net assets	8,558		6,635		8,558		6,635
Asia Pacific
Segment Reporting Information [Line Items]
Revenue	16,434	[1]	16,824	[1]	46,381	[1]	47,664	[1]
Long-lived assets, net of accumulated depreciation and amortization	3,367	[2]	3,447	[2]	3,367	[2]	3,447	[2]
Net assets	9,995		13,202		9,995		13,202
Other Americas
Segment Reporting Information [Line Items]
Revenue	187	[1]	302	[1]	601	[1]	775	[1]
Long-lived assets, net of accumulated depreciation and amortization	27	[2]	47	[2]	27	[2]	47	[2]
Net assets	$ 83		$ 272		$ 83		$ 272

[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.