Commitments and Contingencies - Future Payments (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating lease obligations
Total	$ 4,503
Less than 1 Year	2,565
1-3 Years	1,938
3-5 Years	0
More than 5 Years	0
Contractual Obligation, Fiscal Year Maturity [Abstract]
Total	13,706
Less than 1 Year	8,717
1-3 Years	3,766
3-5 Years	0
More than 5 Years	1,223
Income Tax Uncertainties [Abstract]
Total	1,223	[1]	1,126	891	668
Less than 1 Year	0	[1]
1-3 Years	0	[1]
3-5 Years	0	[1]
More than 5 Years	1,223	[1]
Royalty and Content License Fee [Member]
Contractual Obligation, Fiscal Year Maturity [Abstract]
Total	7,980
Less than 1 Year	6,152
1-3 Years	1,828
3-5 Years	0
More than 5 Years	$ 0

[1] Represents uncertain tax positions for which we could not make a reasonable estimate of the amount or the exact period of related future payments. Refer to Note 9. Income Taxes.