Investment in and Advances to Unconsolidated Affiliates Equity Method Investment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	$ 4.8	$ 2.9	$ 8.6	$ 5.9
Casino revenue	36.6	33.2	72.6	65.1
Non-casino revenue	2.0	1.8	4.0	3.8
Net revenue	38.6	35.0	76.6	68.9
Operating and SG&A expense	26.5	25.0	53.3	49.6
Depreciation & amortization expense	3.3	3.2	6.5	6.3
Operating income	8.8	6.8	16.8	13.0
Interest and other expense, net	(0.9)	(1.1)	(1.8)	(2.2)
Net income	7.9	5.7	15.0	10.8
Miami Valley Gaming and Racing [Member]
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	$ 3.9	$ 2.8	$ 7.5	$ 5.4