Property and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 1,248	[1]	$ 486	[1]	$ 2,517	[1]	$ 1,461	[1]
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment					5 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment					5 years
Office and Computer Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment					3 years
Office and Computer Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment					5 years
Software [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment					3 years

[1] Amounts are included in the cost of services and selling, general and administrative expense line items of the condensed consolidated statements of operations.