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This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The amount of noncurrent liabilities reported by an equity method investment of the entity.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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The number of units in a real estate property owned as of the balance sheet date.

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The cash outflow for a borrowing supported by a written promise to pay an obligation.

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Investment in and Advances to Unconsolidated Affiliates (Details) $ in Millions			3 Months Ended
	Oct. 02, 2015 USD ($) terminal	Dec. 21, 2012 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Jan. 03, 2017 USD ($)	Dec. 31, 2016	Nov. 21, 2016 USD ($) slot_machine dining_facility gaming_table lounges	Aug. 31, 2016	Jul. 06, 2016 ft² rooms	Dec. 31, 2012 USD ($)
Investments in and Advances to Affiliates [Line Items]
Other liabilities										$ 50.0
Distributed earnings from equity investments			$ 4.3	$ 4.0
Saratoga Casino Black Hawk [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage							25.00%
Equity Method Investments							$ 6.5
Equity Method Investments, Number of Slot Machines \| slot_machine							500
Equity Method Investments, Number of Table Games \| gaming_table							7
Equity Method Investments, Number of Lounges \| lounges							3
Equity Method Investments, Number of Dining Facilities \| dining_facility							2
Old Bay Gaming and Racing LLC [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage								50.00%
Ocean Downs [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage					25.00%
Equity Method Investments					$ 24.0
Miami Valley Gaming LLC [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
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate			5.00%
Repayments of Notes Payable			$ 27.1
Distributed earnings from equity investments			$ 4.0	$ 4.0
Saratoga Casino Holdings, LLC [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage	25.00%
Equity Method Investments	$ 24.5
Number of Lottery Terminals \| terminal	1,700
Ocean Downs LLC and Racing Services LLC [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage Through Other Investments					12.50%
Equity Method Investment, Effective Ownership Percentage					62.50%
Funded at Closing [Member] \| Miami Valley Gaming LLC [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investments		$ 10.0
Saratoga Casino and Raceway [Member] \| DNC [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Saratoga Casino and Raceway [Member] \| Saratoga Casino Holdings, LLC [Member]
Investments in and Advances to Affiliates [Line Items]
Management Fee Agreement, Term	5 years
Saratoga Casino Holdings, LLC [Member]
Investments in and Advances to Affiliates [Line Items]
Number of Units in Real Estate Property \| rooms									117
Area of Event Space \| ft²									3,000