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FAIR VALUE MEASUREMENTS (Details) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Jun. 30, 2012
Mortgage Notes Payable      
Carrying Amount $ 133,867,404 $ 138,055,522 $ 139,691,783
Partnership Properties
     
Mortgage Notes Payable      
Carrying Amount 133,867,404 138,055,523  
Estimated Fair Value 148,516,305 155,942,880  
Investment Properties
     
Mortgage Notes Payable      
Carrying Amount 137,732,039 138,256,711  
Estimated Fair Value $ 154,828,019 $ 157,983,030