Acquisitions And New Ventures Acquisitions And New Ventures (Details) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended	12 Months Ended				3 Months Ended		3 Months Ended	9 Months Ended		1 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2012 Miami Valley Gaming and Racing [Member]	Dec. 31, 2012 Miami Valley Gaming and Racing [Member] acre sqft mi	Dec. 21, 2012 Notes Payable, Other Payables [Member] Miami Valley Gaming and Racing [Member] mi	Dec. 31, 2012 Minimum Miami Valley Gaming and Racing [Member] terminal	Dec. 31, 2012 Maximum Miami Valley Gaming and Racing [Member] terminal	Sep. 30, 2013 Oxford Acquisition [Member]	Jul. 17, 2013 Oxford Acquisition [Member] SlotMachines Tables sqft	Sep. 30, 2013 Riverwalk Acquisition [Member]	Sep. 30, 2013 Riverwalk Acquisition [Member]	Oct. 23, 2012 Riverwalk Acquisition [Member] sqft hotel_rooms acre	Mar. 31, 2012 Ohio Joint Venture [Member]	Sep. 30, 2013 Ohio Joint Venture [Member]	Dec. 31, 2012 License Fee Payable [Member] Miami Valley Gaming and Racing [Member]
Schedule of Equity Method Investments [Line Items]
Purchase price, net of cash acquired											$ 154,872,000			$ 145,600,000
Future Business Acquisition, Cost Of Acquired Entity, Purchase Price											168,600,000				60,000,000
Business acquisition, cash that was paid at close															10,000,000
Square footage of Casino						186,000					25,000			25,000
Race Track, Length						0.625
Square Footage of Event Center														5,600
Acres						120								22
Number of Hotel rooms														80
Revenues	0	0	0	0						17,700,000		12,600,000	40,900,000
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	12,323,000	7,069,000	95,020,000	90,106,000						4,000,000		1,600,000	8,200,000
Ownership In Joint Venture															50.00%
Maximum Amount Of Contributions Needed To Fund Asset Purchase For Existing Racing Licenses And Racetrack Assets, License Fees and Acquisition Costs For Land						222,000,000
Future Business Acquisition, Cost of Acquired Entity, Cash That Will Be Paid															10,000,000
Equity Method Investments							50,000,000
Distance to nearest gaming facility							50
Contingent condiseration payment term					P5Y
Number of Lottery Terminals								1,600	1,800
Equity Method Investments, Facility Cost						212,000,000											50,000,000
Payments to Acquire Interest in Joint Venture			27,000,000	6,525,000												27,000,000
Number Slot Machines											800
Number of tables games											22
Cash Acquired from Acquisition											$ 13,700,000