Investments and Acquisition Activities (Details) (USD $)	3 Months Ended				12 Months Ended	3 Months Ended			3 Months Ended				3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Aug. 12, 2013	Dec. 31, 2013 ACDL [Member]	Mar. 31, 2014 Farmworks	Mar. 31, 2014 Midwest [Member]	Mar. 31, 2014 Ameristar [Member]	Mar. 31, 2013 Retama Partners	Mar. 31, 2014 Retama Partners	Mar. 31, 2014 South Segment [Member]	Mar. 31, 2014 West [Member]	Mar. 31, 2014 Ameristar [Member]	Sep. 30, 2013 Ameristar [Member]	Mar. 31, 2013 Ameristar [Member]	Aug. 12, 2013 Ameristar [Member]
Schedule of Equity Method Investments
Increase to Depreciation and Amortization Expense, Pro Forma		$ 30,200,000
Increase to Interest Expense, Pro Forma		36,100,000
Equity Method Investment, Other than Temporary Impairment					92,200,000
Business Acquisition Costs Excluding Assumption Of Long Term Debt																1,800,000,000
Business Acquisition Transaction, Consideration for Equity Acquired																962,428,000
Repayments of Debt														878,828,000
Current and other assets	575,485,000		602,178,000													152,165,000
Property, Plant and Equipment, Net	3,055,375,000		3,036,515,000													1,783,735,000
Goodwill	919,282,000		919,282,000				551,100,000	860,000,000			231,500,000	78,200,000				860,805,000
Intangible Assets	504,951,000		500,084,000													524,200,000
Other non-current assets	89,797,000		87,800,000													39,496,000
Total assets	5,152,557,000		5,159,426,000													3,360,401,000
Current liabilities	366,109,000		372,406,000													179,493,000
Deferred tax liabilities																218,646,000
Other long-term liabilities	35,105,000		31,321,000													8,109,000
Long-term Debt	4,349,500,000		4,380,100,000													1,112,897,000
Total liabilities	4,902,849,000		4,934,256,000													1,519,145,000
Business Acquisition, Net Assets Acquired																1,841,256,000
Land and land improvements	391,700,000		391,700,000													162,770,000
Buildings, vessels and improvements	2,494,200,000		2,492,200,000													1,308,151,000
Furniture, fixtures and equipment	644,100,000		633,100,000													158,999,000
Construction in Progress	232,900,000		175,600,000													153,815,000
Business Acquisition, Total Property and Equipment Acquired																1,783,735,000
Trade names																187,000,000
Gaming licenses																258,800,000
Player relationships																74,000,000
Favorable leasehold interests																4,400,000
Acquired Intangible Assets																524,200,000
Net revenues													279,910,000
Net Income (Loss) Attributable to Parent	19,047,000	(85,391,000)											54,894,000
Pro Forma Net Revenue															561,697,000
Pro Forma Net Income (Loss)															(61,192,000)
Pro Forma Earnings Per Share, Basic															$ (1.37)
Pro Forma Earnings Per Share, Diluted															$ (1.37)
Long Term Purchase Commitment, Invested Amount						2,000,000
Business Acquisition, Percentage of Voting Interests Acquired										75.50%
Goodwill, Acquired During Period									3,300,000
Intangible Asset, Acquired During Period									5,000,000
Promissory Notes	10,200,000		9,500,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount				176,900,000
Held-to-maturity, Corporate Bonds	$ 11,400,000