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VARIABLE INTEREST ENTITIES BORROWINGS (Mortgage Payable) (Details) RSO (USD $)
In Millions, unless otherwise specified
7 Months Ended 12 Months Ended
Aug. 01, 2011
Dec. 31, 2012
Dec. 31, 2011
RCC Real Estate [Member] | Mortgages [Member]
     
Debt Instrument [Line Items]      
Number of multi family units 504    
Payment to acquire rental property $ 18.1    
Percentage of units occupied at acquisition 95.00%    
RSO [Member]
     
Debt Instrument [Line Items]      
Weighted-average borrowing rate   1.62% 1.38%
RSO [Member] | Mortgages [Member]
     
Debt Instrument [Line Items]      
Debt instrument term 7 years    
Principal outstanding $ 13.6 $ 13.6 $ 13.6
Description of variable rate basis   one-month LIBOR  
Basis spread on variable rate   3.95%  
Weighted-average borrowing rate   4.17% 4.23%