Investment in Eldorado Financial Information (Details) (Eldorado, USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Eldorado
Schedule of Equity Method Investments [Line Items]
Net operating revenues	$ 62,179	$ 63,375
Operating income	6,991	6,599
Net income	3,053	2,529
Net income attributable to non-controlling interest	0	0
Net income attributable to Eldorado	$ 3,053	$ 2,529