Acres of land

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Number of Lottery Terminals

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Square footage of Casino

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Investment in and Advances to Unconsolidated Affiliates (Details) $ in Millions		3 Months Ended	9 Months Ended
	Dec. 21, 2012 USD ($)	Sep. 30, 2016 USD ($) terminal	Sep. 30, 2016 USD ($) terminal	Sep. 30, 2015 USD ($)	Aug. 02, 2016	Dec. 31, 2015 USD ($) ft² a mi	Dec. 31, 2012 USD ($)
Investments in and Advances to Affiliates [Line Items]
Long-term debt, excluding current portion		$ 15.7	$ 15.7			$ 20.5	$ 50.0
Dividend from investment in unconsolidated affiliates			$ 12.3	$ 11.0
Ocean Downs [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage					50.00%
Miami Valley Gaming and Racing [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage						50.00%
Equity Method Investments	$ 60.0
Note Payable, Term	6 years
Equity Method Investments, Contingent Payable	$ 10.0
Financial Performance Period To Determine Potential Contingent Consideration Payment	7 years
Acres \| a						120
Race Track, Length \| mi						0.625
Square footage of Casino \| ft²						186,000
Number of Lottery Terminals \| terminal		1,680	1,680
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		5.00%	5.00%
Dividend from investment in unconsolidated affiliates		$ 3.8	$ 11.5
Funded at Closing [Member] \| Miami Valley Gaming and Racing [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investments	$ 10.0
Notes Payable, Other Payables [Member] \| Miami Valley Gaming and Racing [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investments	$ 50.0