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Subsequent Events Maples on 97th (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Feb. 28, 2013
Dec. 31, 2011
Subsequent Event [Line Items]      
Long-term Debt $ 39,119,507 $ 7,500,000 $ 35,464,455
Debt Instrument, Interest Rate, Stated Percentage   9.00%  
Long Term Debt, Maturity date at a point in time Apr. 01, 2050    
Maples on 97th [Member]
     
Subsequent Event [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage   3.55%  
Long Term Debt, Maturity date at a point in time Feb. 10, 2016