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Operating Segment and Enterprise Wide Reporting (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Net long-lived tangible assets by location
Net long-lived tangible assets	$ 46,300	$ 50,448
United States [Member]
Schedule of Net long-lived tangible assets by location
Net long-lived tangible assets	41,928	46,928
United Kingdom [Member]
Schedule of Net long-lived tangible assets by location
Net long-lived tangible assets	2,626	2,997
Europe (excluding United Kingdom) [Member]
Schedule of Net long-lived tangible assets by location
Net long-lived tangible assets	313	521
Other [Member]
Schedule of Net long-lived tangible assets by location
Net long-lived tangible assets	$ 1,263	$ 2

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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