Equity Method Investments (Details) (USD $)	3 Months Ended								12 Months Ended				12 Months Ended	3 Months Ended	5 Months Ended	12 Months Ended				12 Months Ended			12 Months Ended											12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 12, 2013	Dec. 31, 2013 ACDL	Sep. 30, 2013 Ameristar	Dec. 31, 2013 Ameristar	Dec. 31, 2013 Ameristar	Dec. 31, 2012 Ameristar	Aug. 12, 2013 Ameristar	Dec. 31, 2012 Federated Sports and Gaming	Dec. 31, 2013 Retama Partners	Dec. 31, 2012 Retama Partners	Sep. 30, 2012 Retama Partners	Dec. 31, 2012 Lumiere Place	Dec. 31, 2012 Farmworks	Dec. 31, 2013 Midwest [Member]	Dec. 31, 2012 Midwest [Member]	Dec. 31, 2013 Midwest [Member] Ameristar	Dec. 31, 2013 South Segment [Domain] Ameristar	Dec. 31, 2013 West [Member]		Dec. 31, 2012 West [Member]		Dec. 31, 2013 West [Member] Ameristar	Dec. 31, 2013 Retama Partners
Schedule of Equity Method Investments
Increase to Depreciation and Amortization Expense, Pro Forma									$ 72,700,000	$ 120,800,000
Increase to Interest Expense, Pro Forma									105,200,000	147,900,000
Business Acquisition, Pro Forma Revenue																2,209,143,000	2,198,057,000
Revenue, Net															425,767,000
Indefinite-Lived Trade Names																		187,000,000
Land and land improvements	395,100,000				241,200,000				395,100,000	241,200,000								162,770,000
Assets, Current	598,819,000				595,407,000				598,819,000	595,407,000								152,165,000
Business Acquisition Costs Excluding Assumption Of Long Term Debt																		1,800,000,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount												176,900,000
Equity Method Investment, Other than Temporary Impairment													92,200,000
Loans and Leases Receivable, Related Parties, Additions													1,800,000
Gain (Loss) on Sale of Property Plant Equipment									(2,800,000)	1,200,000	(2,400,000)
Long-term Purchase Commitment, Amount																								2,000,000
Long Term Purchase Commitment, Invested Amount																							2,000,000
Business Acquisition, Contratual rights																						50.00%												50.00%
Long-term Investments																					7,800,000
Business Acquisition, Percentage of Voting Interests Acquired																																		75.50%
Goodwill, Acquired During Period									864,100,000																									3,300,000
Indefinite-lived Intangible Assets Acquired									529,200,000																									5,000,000
Notes, Loans and Financing Receivable, Net, Noncurrent	9,500,000				4,000,000				9,500,000	4,000,000
Held-to-maturity, Corporate Bonds	11,400,000								11,400,000
Payments to Acquire Businesses, Gross																				16,700,000
Capital Funding, Future Commitment																				2,000,000
Cost of Acquired Entity															2,800,000,000	2,800,000,000		962,428,000	4,600,000
Held-to-maturity securities	0				4,428,000				0	4,428,000
Repayments of Debt														878,828,000
Business Acquisition, Net Assets Acquired																		1,841,256,000
Property and equipment, net	3,039,874,000				1,285,871,000				3,039,874,000	1,285,871,000								1,783,735,000
Goodwill	919,282,000				55,157,000				919,282,000	55,157,000					860,800,000	860,800,000		860,805,000									551,100,000	231,500,000					78,200,000
Intangible Assets, Net (Excluding Goodwill)	500,084,000				20,833,000				500,084,000	20,833,000								524,200,000
Other Assets, Noncurrent	87,800,000				54,635,000				87,800,000	54,635,000								39,496,000
Assets	5,159,426,000				2,108,994,000				5,159,426,000	2,108,994,000								3,360,401,000							2,310,700,000	542,800,000			436,000,000	[1]	0	[1]
Liabilities, Current	372,406,000				199,527,000				372,406,000	199,527,000								179,493,000
Deferred Tax Liabilities, Net	(158,800,000)				(6,700,000)				(158,800,000)	(6,700,000)								218,646,000
Other Liabilities, Noncurrent	31,321,000				21,606,000				31,321,000	21,606,000								8,109,000
Long-term Debt	4,380,100,000				1,440,500,000				4,380,100,000	1,440,500,000								1,112,897,000
Liabilities	4,934,256,000				1,661,877,000				4,934,256,000	1,661,877,000								1,519,145,000
Buildings, vessels and improvements	2,492,200,000				1,113,300,000				2,492,200,000	1,113,300,000								1,308,151,000
Furniture, fixtures and equipment	633,100,000				428,300,000				633,100,000	428,300,000								158,999,000
Construction in Progress, Gross	175,600,000				46,400,000				175,600,000	46,400,000								153,815,000
Business Acquisition, Total Property and Equipment Acquired																		1,783,735,000
Business Acquisition, Indefinite-Lived Intangible, Gaming Licenses																		258,800,000
Business Acquisition, Definite-Lived Intangible, Player Relationship																		74,000,000
Business acquisition, definite-lived intangible assets, Favorable leasehold interests																		4,400,000
Buisness Acquisition, Acquired Definite-Lived Intangible Assets																		524,200,000
Net income (loss)	15,000,000	(180,400,000)	(5,100,000)	(85,400,000)	(42,400,000)	(400,000)	12,000,000	(1,000,000)	(255,870,000)	(31,805,000)	(2,539,000)				34,495,000
Business Acquisition, Pro Forma Net Income (Loss)																(59,792,000)	34,529,000
Business Acquisition, Pro Forma Earnings Per Share, Basic																$ (1.02)	$ 0.56
Business Acquisition, Pro Forma Earnings Per Share, Diluted																$ (1.02)	$ 0.56
Goodwill, Gross					55,200,000					55,200,000
Impairment of Equity Method Investment, Decline In Value										25,000,000
Decrease in Goodwill Due to Purchase Price Allocation Adjustment	$ 2,300,000								$ 2,300,000

[1] (a) Our Midwest segment consists of Ameristar Council Bluffs located in Iowa, Ameristar East Chicago located in Indiana, Ameristar Kansas City located in Missouri, Ameristar St. Charles located in Missouri, Belterra located in Indiana, Belterra Park (formerly River Downs) located in Ohio and River City located in Missouri.