Summary of Significant Accounting Policies (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue recognition
Promotional allowances	$ 144,740,000	$ 141,816,000	$ 133,402,000
Cost of complimentary services	90,133,000	91,936,000	90,912,000
Gaming and Racing Taxes
Gaming expense	1,070,000,000	1,060,000,000	975,700,000
Rooms
Revenue recognition
Promotional allowances	26,612,000	24,646,000	23,980,000
Cost of complimentary services	9,814,000	9,149,000	9,188,000
Food and beverage
Revenue recognition
Promotional allowances	108,250,000	106,687,000	99,024,000
Cost of complimentary services	74,263,000	76,357,000	75,180,000
Other
Revenue recognition
Promotional allowances	9,878,000	10,483,000	10,398,000
Cost of complimentary services	$ 6,056,000	$ 6,430,000	$ 6,544,000