Other Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of definite-lived intangible assets	$ 52,900,000	$ 56,100,000	$ 13,300,000
Indefinite-lived intangible assets impairment	0
Additional payments not included in future estimated amortization expense	2,300,000
Strategic development
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, period increase (decrease)	(5,500,000)
Table games license
Finite-Lived Intangible Assets [Line Items]
Definite-lived license agreements, gross	$ 200,000
Finite-lived intangible asset useful life	20 years
Calder
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 2,300,000	2,300,000
TwinSpires | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, period increase (decrease)	(4,600,000)	$ (14,000,000)
Big Fish Games | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, period increase (decrease)	(16,700,000)
Casinos | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, period increase (decrease)	$ (10,800,000)