Discontinued Operations (Details) (USD $)	3 Months Ended			3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2013 Ameristar Lake Charles [Domain]	Mar. 31, 2014 Boomtown Reno [Member] acre	Sep. 30, 2013 Atlantic City [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total Purchase Price Per the Purchase Agreement	$ 260,000,000
Impairment of Long-Lived Assets to be Disposed of	4,700,000
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				25,000,000
Proceed From Divestiture of Business, Deferred Consideration				10,000,000
Reno additional land for sale (acres)					27
Number of acres held from discontinued operation					810
Percentage of Option to Purchase Company's Interest					100.00%
Number of Years, Option to Purchase Company's Membership Interest					1 year
Proceeds from Sale of Property Held-for-sale						29,500,000
Income (Loss) from Discontinued Operation Disclosures
Revenues	41,000,000	46,200,000
Operating loss	300,000	4,100,000
Income tax benefit	0	(1,700,000)
Assets:
Land, buildings, vessels and equipment, net	271,300,000		275,300,000
Other assets, net	50,800,000		47,200,000
Assets of discontinued operations held for sale	322,093,000		322,548,000
Liabilities:
Liabilities of discontinued operations held for sale	18,928,000		26,103,000
Net assets	$ 303,200,000		$ 296,400,000