Acquisitions And New Ventures Acquisitions And New Ventures (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended		1 Months Ended	12 Months Ended					3 Months Ended		6 Months Ended			1 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 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	Jul. 17, 2013 Oxford Acquisition [Member] sqft	Jun. 30, 2013 Riverwalk Acquisition [Member]	Jun. 30, 2012 Riverwalk Acquisition [Member]	Jun. 30, 2013 Riverwalk Acquisition [Member]	Jun. 30, 2012 Riverwalk Acquisition [Member]	Oct. 23, 2012 Riverwalk Acquisition [Member] sqft hotel_rooms acre	Mar. 31, 2012 Ohio Joint Venture [Member]	Jun. 30, 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												$ 284,641,000		$ 437,546,000
Square Footage of Event Center															5,600
Acres						120									22
Revenues											14,100,000		28,200,000
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	81,327,000	80,709,000	82,697,000	83,037,000							3,300,000		6,500,000
Purchase price of the entity to be acquired															145,600,000
Square footage of Casino						186,000				25,000					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																		142,000,000
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			12,500,000	5,400,000													12,500,000
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax												$ 50,302,000		$ 54,188,000
Business Acquisition, Pro Forma Earnings Per Share, Basic												$ 2.92		$ 3.15
Business Acquisition, Pro Forma Earnings Per Share, Diluted												$ 2.87		$ 3.11
Weighted Average Basic Shares Outstanding, Pro Forma												16,978		16,940
Pro Forma Weighted Average Shares Outstanding, Diluted												17,502		17,443