Long-Term Debt (Details) (USD $)	12 Months Ended			0 Months Ended	12 Months Ended				0 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012	Oct. 02, 2012 Secured credit facility	Dec. 31, 2012 Secured credit facility	Dec. 31, 2012 Secured credit facility Minimum	Dec. 31, 2012 Secured credit facility Maximum	Dec. 31, 2012 Secured credit facility March 31, 2013	Jul. 21, 2010 SWIDA bonds Midwest Racing, Inc. Gateway facility	Dec. 31, 2010 SWIDA bonds Midwest Racing, Inc. Gateway facility	Dec. 31, 1996 SWIDA bonds Midwest Racing, Inc. Gateway facility
Long-Term Debt
Maximum borrowing capacity under the credit facility					$ 60,000,000			$ 55,000,000
Amount outstanding under the credit facility	29,160,000		19,700,000		19,700,000
Interest rate at the end of the period (as a percent)					2.21%
Reference rate					LIBOR
Interest rate added to the reference rate (as a percent)					2.00%	2.00%	3.25%
Maximum amount allowed to pay dividends and repurchase shares of common stock under modified debt agreement				2,500,000
Remaining maximum borrowings available pursuant to the credit facility					20,371,000
Amount to be borrowed to maintain compliance with the quarterly debt covenant calculation					18,691,000
Aggregate principal amount											21,500,000
Interest expense										100,000
Amount of bonds redeemed									1,751,000
Redemption amount		2,986,000							1,909,000
Premium on redemption of debt									158,000
Loss on extinguishment of debt	$ 67,000								$ 208,000