Summary of Significant Accounting Policies (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenue recognition
Promotional allowances	$ 141,816,000	$ 133,402,000	$ 142,775,000
Cost of complimentary services	91,936,000	90,912,000	93,440,000
Gaming and Racing Taxes
Gaming expense	1,060,000,000	975,700,000	947,100,000
Rooms
Revenue recognition
Promotional allowances	24,646,000	23,980,000	23,316,000
Cost of complimentary services	9,149,000	9,188,000	9,406,000
Food and beverage
Revenue recognition
Promotional allowances	106,687,000	99,024,000	108,473,000
Cost of complimentary services	76,357,000	75,180,000	77,444,000
Other
Revenue recognition
Promotional allowances	10,483,000	10,398,000	10,986,000
Cost of complimentary services	$ 6,430,000	$ 6,544,000	$ 6,590,000