Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenue recognition
Promotional allowances	$ 44,586,000	$ 36,369,000
Cost of complimentary services	26,862,000	22,358,000
Gaming and Racing Taxes
Gaming expense	282,000,000	276,900,000
Rooms
Revenue recognition
Promotional allowances	9,319,000	6,294,000
Cost of complimentary services	3,239,000	2,356,000
Food and beverage
Revenue recognition
Promotional allowances	32,490,000	27,479,000
Cost of complimentary services	21,979,000	18,480,000
Other
Revenue recognition
Promotional allowances	2,777,000	2,596,000
Cost of complimentary services	$ 1,644,000	$ 1,522,000