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Debt - Schedule of Future Mortgage Debt Maturities (Detail) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Debt Disclosure [Abstract]    
June 30, 2014 $ 9,031,123  
June 30, 2015 30,706,188  
June 30, 2016 15,262,169  
June 30, 2017 53,659,368  
June 30, 2018 19,920,622  
Thereafter 6,314,219  
Total future maturities $ 134,893,689 $ 135,674,432