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Mortgage Indebtedness (Details Textual)
 6 Months Ended
Jun. 30, 2012
Crestmont Apartments [Member]
  
Mortgage Indebtedness (Textual) [Abstract]  
Interest payment period monthly
Principal date May 01, 2013
Amortization schedule 30-year amortization schedule
Cumberland Glen Apartments [Member]
  
Mortgage Indebtedness (Textual) [Abstract]  
Interest payment period monthly
Principal date May 01, 2013
Amortization schedule 30-year amortization schedule
Copper Mill Apartments [Member]
  
Mortgage Indebtedness (Textual) [Abstract]  
Interest payment period monthly
Principal date May 01, 2013
Amortization schedule 30-year amortization schedule
Heritage Trace Apartments [Member]
  
Mortgage Indebtedness (Textual) [Abstract]  
Interest payment period monthly
Principal date May 01, 2013
Amortization schedule 30-year amortization schedule
Belle Creek Apartments [Member]
  
Mortgage Indebtedness (Textual) [Abstract]  
Fixed rate of interest 2.50%
Floating rate 2.25%
Debt Number Of Days Of Libor Against Interest Rate Basis 30-day LIBOR
Tresa At Arrowhead [Member]
  
Mortgage Indebtedness (Textual) [Abstract]  
Fixed rate of interest 2.50%
Floating rate 2.25%
Debt Number Of Days Of Libor Against Interest Rate Basis 30-day LIBOR
Centrepoint Apartments [Member]
  
Mortgage Indebtedness (Textual) [Abstract]  
Interest payment period monthly
Principal date Feb. 01, 2015
Amortization schedule 30-year amortization schedule