Commitments and Contingencies - Minimum Guranteed Royalties (Details) - USD ($) $ in Thousands	3 Months Ended							12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Future Minimum Guarantee Commitments
Total future minimum royalty payments	$ 26,433				$ 36,404			$ 26,433	$ 36,404
Future Minimum Developer Commitments
Impairment of prepaid royalties and minimum guarantees	123	$ 29,836	$ 105	$ 43	$ 858	$ 1,555	$ 89	30,107	$ 2,502	$ 257
Current and long-term liabilities
Future Minimum Developer Commitments
Licensor commitments	22,611							22,611
Current and long-term assets
Future Minimum Developer Commitments
Licensor commitments	22,611							22,611
Guaranteed royalty commitments
Future Minimum Guarantee Commitments
2017	21,097							21,097
2018	1,236							1,236
2019	4,100							4,100
Total future minimum royalty payments	26,433							26,433
Developer Commitments
Future Minimum Developer Commitments
2017	1,235							1,235
Total future minimum developer commitments	$ 1,235							$ 1,235