Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			12 Months Ended	1 Months Ended	12 Months Ended		12 Months Ended			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 L'Auberge Baton Rouge	Dec. 31, 2012 Lumiere Place	Mar. 31, 2010 River City Casino	Dec. 31, 2012 River City Casino	Dec. 31, 2012 River Downs	Dec. 31, 2012 Indiana Income Tax	Dec. 31, 2010 Indiana Income Tax	Mar. 31, 2010 Indiana Income Tax	Dec. 31, 2012 Maximum Indiana Income Tax	Dec. 31, 2012 Minimum Indiana Income Tax
Long-term Purchase Commitment
Number of Acres Committed to Lease						56
Income Tax Examination, Year under Examination											2007	2005
Total guaranteed maximum price			$ 249				$ 20
Long-term Purchase Commitment, Amount				50.0	375.0	82.0
Number of years in Redevelopment Agreement				5 years
Long Term Purchase Commitment, Invesment Credits	13.0			10.0
Annual fee				1.0
Future annual minimum rent amount					4.0
Future annual minimum rent, percentage of annual adjusted gross receipts					2.50%
Minimum square footage of meeting space required						10,000
Minimum number of parking spaces required						1,600
Term of lease agreement						99
Purchase commitment, additional amount						75
Liquidated damages, annual increase						1.0
Liquidated damages, year one						2.0
Liquidated damages, year two						3.0
Liquidated damages, year three						4.0
Liquidated damages, year four						5.0
Liquidated damages, year five						6.0
Liquidated damages, maximum amount						20.0
Self insurance accruals	16.5	14.8
Income Tax Exmination Tax dispute, additional fact review period								60 days
Income Tax Examination Proposed Adjustment Excluding Interest And Penalties										7.3
Income Tax Examination Proposed Penalties and Interest Expense									$ 2.3