Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue recognition
Promotional allowances	$ 43,169,000	$ 35,864,000	$ 87,755,000	$ 72,233,000
Cost of complimentary services	25,623,000	21,911,000	52,485,000	44,269,000
Gaming and Racing Taxes
Gaming expense	267,000,000	266,600,000	549,000,000	543,500,000
Rooms
Revenue recognition
Promotional allowances	8,993,000	6,265,000	18,312,000	12,559,000
Cost of complimentary services	3,121,000	2,307,000	6,360,000	4,663,000
Food and beverage
Revenue recognition
Promotional allowances	31,232,000	27,236,000	63,722,000	54,715,000
Cost of complimentary services	21,119,000	18,175,000	43,098,000	36,655,000
Other
Revenue recognition
Promotional allowances	2,944,000	2,363,000	5,721,000	4,959,000
Cost of complimentary services	$ 1,383,000	$ 1,429,000	$ 3,027,000	$ 2,951,000