Discontinued Operations - Additional Information (Details) - USD ($)		12 Months Ended
	Jan. 09, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Nov. 29, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of Big Fish Games		$ 0	$ 970,700,000	$ 0
Big Fish Games | Earnout Liability
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liabilities measured at fair value on a recurring basis				34,200,000
Big Fish Games | Deferred Payments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liabilities measured at fair value on a recurring basis				28,400,000
Big Fish Games | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate consideration	$ 990,000,000.0
Proceeds from sale of Big Fish Games	970,700,000
Working capital adjustments	5,200,000
Transaction expense, net	14,100,000	0	0	4,700,000
Gain on sale of Big Fish Games	219,500,000	$ 0	219,500,000	0
Carrying Value of Disposal Group	751,200,000
Income tax provision on gain from sale of business	51,200,000
After tax gain	$ 168,300,000
Previously recognized compensation expense					$ 0
Compensation expense recognized due to acceleration of vesting				3,400,000
Stock-based compensation expense			$ 3,400,000	$ 11,100,000