Investments and Acquisition Activities (Details) (USD $)				3 Months Ended						3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Commercial Paper	Mar. 31, 2013 ACDL [Member] member game	Dec. 31, 2012 ACDL [Member]	Mar. 31, 2013 Farmworks	Mar. 31, 2013 Lumiere Place	Mar. 31, 2013 Pinnacle Retama Partners	Jul. 02, 2012 Federated Sports and Gaming	Mar. 31, 2013 Pinnacle Retama Partners	Mar. 31, 2013 Line of Credit ACDL [Member]	Mar. 31, 2013 Non-controlling Interest ACDL [Member]
Schedule of Equity Method Investments
Equity Method Investment, Aggregate Cost				$ 95,000,000
Equity Method Investment, Ownership Percentage												25.00%
Equity method investments	(424,000)	(91,424,000)		(111,800,000)
Long-term Contract, Number of Guest Rooms				541
Number of table games				90
Number of electronic games				500
Equity Method Investment, Aggregate Cost, Additional Amount				16,800,000
Equity Method Investment, Aggregate Cost, Funded Raised Capital				66,500,000
Equity Method Investment, Capital Raise, Majority Shareholders					30,000,000
Line of Credit Facility, Maximum Borrowing Capacity											175,000,000
Line of Credit Facility, Amount Outstanding	1,440,000,000	1,440,500,000									83,700,000
Equity Method Investment, Other than Temporary Impairment				92,200,000	25,000,000
Long-term Purchase Commitment, Amount						2,000,000	50,000,000
Long Term Purchase Commitment, Invested Amount							0
Long Term Purchase Commitment, Investment Credits							10,000,000
Business Acquisition, Contratual rights										50.00%
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred										7,800,000
Business Acquisition, Cost of Acquired Entity, Cash Paid										16,700,000
Capital Funding, Future Commitment										2,000,000
Business Acquisition, Purchase Price Allocation, Goodwill Amount	58,476,000	55,157,000
Notes, Loans and Financing Receivable, Net, Noncurrent	9,000,000	4,000,000
Purchase price									4,600,000
Held-to-maturity Securities			4,500,000
Held-to-maturity, Corporate Bonds	11,400,000
Goodwill, Acquired During Period								3,300,000
Acquired Indefinite-lived Intangible Asset, Amount								$ 5,000,000