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Investment in Mesquite (Tables)
 3 Months Ended
May. 31, 2015
Mesquite  
Schedule of Equity Method Investments [Line Items]  
Equity method investment financial information
The following table presents unaudited condensed financial information of Mesquite for the three months ended March 31, 2015 and 2014 (in thousands):
 
Three Months Ended
 
March 31,
 
2015
 
2014
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