Acquisitions And New Ventures Acquisitions And New Ventures (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		1 Months Ended	12 Months Ended					3 Months Ended		1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2012 Miami Valley Gaming and Racing [Member]	Dec. 31, 2012 Miami Valley Gaming and Racing [Member] sqft mi acre	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	Mar. 29, 2013 Oxford Acquisition [Member]	Mar. 31, 2012 Riverwalk Acquisition [Member]	Oct. 23, 2012 Riverwalk Acquisition [Member] acre sqft hotel_rooms	Mar. 31, 2012 Ohio Joint Venture [Member]	Mar. 31, 2013 Ohio Joint Venture [Member]	Dec. 31, 2012 Ohio Joint Venture [Member]	Dec. 31, 2012 License Fee Payable [Member] Miami Valley Gaming and Racing [Member]
Schedule of Equity Method Investments [Line Items]
Race Track, Length				0.625
Business Acquisition, Pro Forma Revenue									$ 152,905,000
Square Footage of Event Center										5,600
Acres				120						22
Purchase price of the entity to be acquired										145,600,000
Business Acquisition, Contingent Consideration, Potential Cash Payment								8,000,000
Square footage of Casino				186,000						25,000
Number of Hotel rooms										80
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				80,000,000
FutureCapital ExpendituresOnDevelopingAndConstructingFacility													132,000,000
Future Business Acquisition, Cost Of Acquired Entity, Purchase Price								160,000,000			60,000,000
Future Business Acquisition, Cost of Acquired Entity, Cash That Will Be Paid											10,000,000
Equity Method Investments					50,000,000
Fair value of earn-out liability and accrued purchase price	0	(2,331,000)									10,000,000
Distance to nearest gaming facility					50
Contingent condiseration payment term			5 years
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	3,500,000	4,275,000										3,500,000
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax									$ 6,445,000
Business Acquisition, Pro Forma Earnings Per Share, Basic									$ 0.23
Business Acquisition, Pro Forma Earnings Per Share, Diluted									$ 0.22
Weighted Average Basic Shares Outstanding, Pro Forma									16,903
Pro Forma Weighted Average Shares Outstanding, Diluted									17,433