Investment in Mesquite (Details) - Mesquite - USD ($)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Schedule of Equity Method Investments [Line Items]
Net operating revenues	$ 28,294,000	$ 26,476,000
Operating income	5,389,000	3,166,000
Net income	$ 4,392,000	$ 2,201,000