Summary of Significant Accounting Policies - Schedule of Fixed Assets and Computer Software (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Total cost	$ 274,879	$ 260,437
Less accumulated depreciation and amortization	(169,800)	(108,892)
Net fixed assets and computer software	105,079	151,545
Computer software
Property, Plant and Equipment [Line Items]
Total cost	200,587	181,488
Computer equipment
Property, Plant and Equipment [Line Items]
Total cost	2,156	2,161
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total cost	32,645	31,646
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total cost	11,607	13,930
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total cost	18,995	19,896
Land and buildings
Property, Plant and Equipment [Line Items]
Total cost	1,775	1,775
Construction in Process – Computer software and equipment
Property, Plant and Equipment [Line Items]
Total cost	$ 7,114	$ 9,541