SEGMENT AND GEOGRAPHIC DATA Geographic Data Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 167,365	[1]	$ 171,360	[1]	$ 329,226	[1]	$ 337,037	[1]
Long-lived assets, net of accumulated depreciation and amortization	16,902	[2]	18,737	[2]	16,902	[2]	18,737	[2]
Net assets	68,609		88,208		68,609		88,208		74,385
United Kingdon [Member]
Segment Reporting Information [Line Items]
Revenue	47,506	[1]	45,685	[1]	98,366	[1]	92,763	[1]
Long-lived assets, net of accumulated depreciation and amortization	2,825	[2]	3,457	[2]	2,825	[2]	3,457	[2]
Net assets	22,557		22,113		22,557		22,113
Australia [Member]
Segment Reporting Information [Line Items]
Revenue	49,137	[1]	46,188	[1]	91,585	[1]	88,230	[1]
Long-lived assets, net of accumulated depreciation and amortization	7,188	[2]	7,144	[2]	7,188	[2]	7,144	[2]
Net assets	17,875		25,579		17,875		25,579
United States
Segment Reporting Information [Line Items]
Revenue	26,073	[1]	37,124	[1]	52,711	[1]	74,076	[1]
Long-lived assets, net of accumulated depreciation and amortization	2,824	[2]	3,523	[2]	2,824	[2]	3,523	[2]
Net assets	7,303		20,213		7,303		20,213
Europe
Segment Reporting Information [Line Items]
Revenue	28,495	[1]	25,480	[1]	56,203	[1]	50,655	[1]
Long-lived assets, net of accumulated depreciation and amortization	459	[2]	1,020	[2]	459	[2]	1,020	[2]
Net assets	9,740		6,184		9,740		6,184
Asia Pacific
Segment Reporting Information [Line Items]
Revenue	15,964	[1]	16,680	[1]	29,946	[1]	30,840	[1]
Long-lived assets, net of accumulated depreciation and amortization	3,574	[2]	3,546	[2]	3,574	[2]	3,546	[2]
Net assets	10,976		13,652		10,976		13,652
Other Americas
Segment Reporting Information [Line Items]
Revenue	190	[1]	203	[1]	415	[1]	473	[1]
Long-lived assets, net of accumulated depreciation and amortization	32	[2]	47	[2]	32	[2]	47	[2]
Net assets	$ 158		$ 467		$ 158		$ 467

[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.