Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended				3 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Boomtown New Orleans Room	Jun. 30, 2014 River Downs	Jul. 31, 2013 River Downs	Jun. 30, 2014 Indiana Income Tax	Jun. 30, 2014 Minimum Indiana Income Tax	Jun. 30, 2014 Maximum [Member] Indiana Income Tax
Long-term Purchase Commitment [Line Items]
Income Tax Examination, Year under Examination							2005	2007
Amended Guaranteed Maximum Price					$ 119.6
Guaranteed Maximum Construction Costs			14.2	20.1
Self Insurance Reserve	21.7	26.2
Long-term Contract, Number of Guest Rooms			150
Income Tax Examination, Proposed Adjustment Excluding Interest and Penalties						$ 7.3