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Real Estate (Real Estate Available and Held for Sale) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Real Estate Properties [Line Items]    
Real estate available and held for sale $ 334,691 $ 360,517
Residential Operating Properties
   
Real Estate Properties [Line Items]    
Real estate available and held for sale 197,700 221,000
Land
   
Real Estate Properties [Line Items]    
Real estate available and held for sale $ 130,038 $ 132,189