Business Combinations - Cie Games, Inc. (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
	Aug. 20, 2014	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016	Dec. 31, 2014
Business Acquisition, Date of Acquisition [Abstract]
Share price		$ 1.94
Residual value of goodwill		$ 116,832	$ 87,890		$ 87,964
Intangible assets:
Goodwill		$ 116,832	87,890		$ 87,964
Minimum
Business Acquisition, Date of Acquisition [Abstract]
Intangible assets estimated useful life		1 year
Maximum
Business Acquisition, Date of Acquisition [Abstract]
Intangible assets estimated useful life		9 years
Cie Games, Inc.
Business Acquisition, Date of Acquisition [Abstract]
Shares of the Company's common stock	9,983
Share price	$ 5.09
Value of shares transferred in purchase price consideration	$ 50,813
Cash paid	29,495		1,914
Total Consideration	$ 80,308
Share consideration held back to satisfy indemnification claims				2,139
Held back period	579 days
Acquired intangible assets	$ 23,500
Business acquisition, transitional costs		$ 0	$ 0
Intangible assets:
Intangible assets	$ 23,500
Cie Games, Inc. | Minimum
Business Acquisition, Date of Acquisition [Abstract]
Intangible assets estimated useful life		3 years
Cie Games, Inc. | Maximum
Business Acquisition, Date of Acquisition [Abstract]
Intangible assets estimated useful life		5 years