Discontinued Operations (Details) (USD $)	3 Months Ended		9 Months Ended			3 Months Ended	1 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Lumiere Place [Member]	Aug. 31, 2014 Ameristar Lake Charles [Domain]	Dec. 31, 2013 Ameristar Lake Charles [Domain]	Aug. 31, 2014 Boomtown Reno [Member] acre	Sep. 30, 2014 Boomtown Reno [Member] acre	Sep. 30, 2014 Atlantic City [Member]	Sep. 30, 2014 Springfield, Massachusetts [Domain] acre
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of Long-Lived Assets to be Disposed of		$ 144,600,000
Disposal Group, Divestiture of Business, Purchase price, Net						252,300,000
Cash Divested from Deconsolidation						11,000,000
Cash Refund to Buyer from Divestiture of Business, Working Capital Adjustment						2,000,000
Proceeds from Divestiture of Businesses								180,000,000
Proceed From Divestiture of Business, Retained Cash Deposit								35,000,000
Proceed From Divestiture of Business, Additional Cash Consideration, Subsequent Release From Escrow							4,800,000	25,000,000
Adjustment to Sale Estimate, Due to Recoveries, Gain Recognized							2,300,000
Number of Acres Sold From Discontinued Operations									27
Proceeds From Sale of Land, Discontinued Operations									3,500,000
Gain From Sale of Land, Discontinued Operations									2,400,000
Proceed From Divestiture of Business, Deferred Consideration								10,000,000
Reno additional land for sale (acres)												40
Number of acres held from discontinued operation										783
Proceeds from Sale of Property Held-for-sale											29,500,000
Income (Loss) from Discontinued Operation Disclosures
Revenues	0	44,200,000	41,000,000	139,200,000
Operating loss	4,900,000	(140,900,000)	5,200,000	(131,800,000)
Income tax benefit	(100,000)	7,600,000	100,000	2,900,000
Assets:
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	11,800,000		11,800,000		275,300,000
Other assets, net	8,900,000		8,900,000		47,200,000
Assets of discontinued operations held for sale	20,687,000		20,687,000		322,548,000
Liabilities:
Liabilities of discontinued operations held for sale	277,000		277,000		26,103,000
Net assets	$ 20,400,000		$ 20,400,000		$ 296,400,000