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Real Estate (Impairments) (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Property, Plant and Equipment [Line Items]        
Asset Impairment Charges $ 3,300,000 $ 0 $ 6,279,000 $ 0
Net Lease
       
Property, Plant and Equipment [Line Items]        
Impairment of long-lived assets to be disposed of     3,000,000  
Residential Operating Properties [Member]
       
Property, Plant and Equipment [Line Items]        
Asset Impairment Charges     $ 3,300,000