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Recent Real Estate Transactions (Disposals of Properties) (Details)
3 Months Ended
Mar. 31, 2016
USD ($)
Property
Dec. 31, 2015
USD ($)
Real Estate Properties [Line Items]    
Promissory note issued for property acquired $ 146,922,765 $ 142,638,401
Residential Properties [Member]    
Real Estate Properties [Line Items]    
Number of properties | Property 84  
Purchase price of property acquired $ 7,399,545  
Residential Properties [Member] | Twenty Four Dubos Model Homes [Member]    
Real Estate Properties [Line Items]    
Number of properties | Property 24  
Purchase price of property acquired $ 7,399,545  
Cash payment for the properties acquired 2,200,000  
Promissory note issued for property acquired $ 5,200,000  
Residential Properties [Member] | Four Dubos Model Homes [Member]    
Real Estate Properties [Line Items]    
Number of properties | Property 4  
Proceeds from sale of property $ 1,300,000  
Mortgage notes payable retired 460,000  
Gain (loss) on sale of property $ 175,000