Natural Disasters (Details) (USD $)	9 Months Ended			0 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Churchill Downs Hail	Feb. 24, 2011 Harlows Casino hotel_rooms	Feb. 24, 2011 Harlows Casino Wind	Mar. 31, 2012 Harlows Casino Wind	Sep. 30, 2012 Harlows Casino Wind	Dec. 31, 2011 Harlows Casino Wind	Sep. 30, 2012 Harlows Casino Flood	Dec. 31, 2011 Harlows Casino Flood	May 12, 2011 Harlows Casino Flood seats
Business Interruption Loss [Line Items]
Number Of Seats In Entertainment Center										2,600
Insurance Deductible		$ 500,000				$ 100,000		$ 1,300,000
Reduction To Property And Equipment Due To Natural Disaster				1,400,000				8,500,000
Repair expenditures				400,000				2,000,000
Insurance Settlements, Partial Settlement Received		600,000							3,500,000
Insurance Settlements Receivable					3,400,000			12,000,000
Unusual or Infrequent Item, Net of Insurance Proceeds	(6,514,000)				1,500,000			5,000,000
Number Of Hotels Rooms Damaged			61
Preliminary Claim For Damages Incurred				1,000,000
Insurance Settlements Received, Reduction Of Selling And Administrative Expenses Related To The Interruption Of Business							400,000
Casualty Losses	12,342,000
Insurance Recoveries	$ (18,856,000)