Property and Equipment and Intangible Assets (Details 3) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Intangible Assets
Intangible Assets	$ 65,690,000		$ 65,690,000		$ 75,551,000
Accumulated Amortization	(29,726,000)		(29,726,000)		(28,115,000)
Amortization expense	4,000,000	6,000,000	11,000,000	12,000,000
Estimated future amortization of identifiable intangible assets
2013 (remaining three months)	2,278,000		2,278,000
2014	9,096,000		9,096,000
2015	8,983,000		8,983,000
2016	8,362,000		8,362,000
2017	3,138,000		3,138,000
Thereafter	4,107,000		4,107,000
Total	35,964,000		35,964,000
Goodwill
Goodwill	126,000,000		126,000,000		126,000,000
Minimum
Intangible Assets
Useful life			1 year
Maximum
Intangible Assets
Useful life			10 years
Technology-based
Intangible Assets
Intangible Assets	34,078,000		34,078,000		39,066,000
Accumulated Amortization	(10,537,000)		(10,537,000)		(8,345,000)
Trademarks
Intangible Assets
Intangible Assets	18,236,000		18,236,000		18,236,000
Accumulated Amortization	(5,813,000)		(5,813,000)		(3,907,000)
Contract-based
Intangible Assets
Intangible Assets	9,082,000		9,082,000		11,275,000
Accumulated Amortization	(9,082,000)		(9,082,000)		(10,127,000)
Customer relationships
Intangible Assets
Intangible Assets	4,294,000		4,294,000		6,974,000
Accumulated Amortization	$ (4,294,000)		$ (4,294,000)		$ (5,736,000)