Discontinued Operations (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 acre	Mar. 31, 2012	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses, Net of Cash Divested	$ 10,800,000
Reno additional land for sale (acres)	27
Number of acres held from discontinued operation	783
Income (Loss) from Discontinued Operation Disclosures
Revenues	200,000	8,500,000
Operating loss	0	(800,000)
Income tax benefit	0	100,000
Loss from discontinued operations, net of income taxes	(45,000)	(683,000)
Assets:
Land	36,600,000		36,600,000
Other assets, net	2,000,000		2,000,000
Assets of Disposal Group, Including Discontinued Operation, Current	38,609,000		38,609,000
Liabilities:
Liabilities of Disposal Group, Including Discontinued Operation, Current	0		0
Net assets	38,600,000		38,600,000
Boomtown Reno [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Gross Amount of Proceeds	12,900,000
Gain on Sale of Discontinued Operation	1,100,000
Cash Sold to Buyer	2,100,000
Additional Proceeds From Sale of Divested Business	500,000
Discontinued Operation, Potential proceeds from sale of additional interest	3,800,000
Atlantic City [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Sale of Property Held-for-sale	$ 30,600,000
Boomtown Reno
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of Option to Purchase Company's Interest	100.00%
Number of Years, Option to Purchase Company's Membership Interest	1 year