Discontinued Operations (Details) (USD $)	3 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
Additional Disclosures
Total Invested Capital Related to the Project	$ 260,000,000								$ 260,000,000
Impairment of Long-Lived Assets to be Disposed of									144,600,000
Impairment of indefinite-lived intangible									10,000,000	0	0
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Revenues									181,300,000	213,100,000	240,000,000
Operating loss									(123,500,000)	(19,000,000)	(31,600,000)
Other non-operating income, net									(300,000)	100,000	100,000
Income (loss) before income taxes									(123,800,000)	(18,900,000)	(31,600,000)
Income tax benefit (expense)									1,200,000	300,000	200,000
Income (loss) from discontinued operations	6,400,000	(133,300,000)	2,000,000	2,400,000	(11,300,000)	(7,100,000)	(1,200,000)	1,000,000	(122,540,000)	(18,568,000)	(31,442,000)
Assets:
Property and equipment, net	272,000,000				446,700,000				272,000,000	446,700,000
Other assets, net	47,200,000				13,100,000				47,200,000	13,100,000
Assets of discontinued operations held for sale	319,189,000				459,841,000				319,189,000	459,841,000
Liabilities:
Liabilities of discontinued operations held for sale	26,103,000				21,429,000				26,103,000	21,429,000
Net assets	293,100,000				438,400,000				293,100,000	438,400,000
Gaming Licenses
Additional Disclosures
Impairment of indefinite-lived intangible									(31,100,000)	(21,100,000)
Ameristar Lake Charles [Domain]
Additional Disclosures
Proceed From Divestiture of Business, Retained Cash Deposit									35,000,000
Proceed From Divestiture of Business, Additional Cash Consideration, Subsequent Release From Escrow									25,000,000
Proceed From Divestiture of Business, Deferred Consideration									10,000,000
Expected amount of proceeds									180,000,000
Boomtown Reno
Additional Disclosures
Expected amount of proceeds										12,900,000
Potential proceeds from sale of additional interest										1,100,000
Number of acres held from discontinued operation									810
Atlantic City
Additional Disclosures
Discontinued Operations, Potential Proceeds from Sale of Land									$ 29,500,000