Write-downs, reserves and recoveries, net (Details) (USD $)	3 Months Ended		12 Months Ended	1 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012 US Army Corp of Engineers [Member]	Jan. 31, 2012 Federated Sports and Gaming	Mar. 31, 2013 Slot and Other Equipment [Member]
Write-downs, Reserves and Recoveries [Line Items]
Loss (gain) on disposal of assets	$ 309,000	$ (1,993,000)	$ 2,500,000		$ 309,000
Reserve on uncollectable loan receivable	0	2,000,000
Gain on collection of loan receivables	(200,000)	0
Impairment of assets	200,000	0
Write-downs, reserves and recoveries, net	314,000	8,000
Proceeds from Collection of Other Receivables				$ (2,000,000)