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NET INVESTMENT IN SALES-TYPE LEASES (Schedule of Future Minimum Rentals) (Details) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Investments [Abstract]    
2014 $ 39,630,307  
2015 31,985,296  
2016 31,952,927  
2017 31,952,927  
2018 31,952,927  
Thereafter 284,121,468  
Total $ 451,595,852 $ 380,608,263