Quarterly report pursuant to Section 13 or 15(d)

Properties, net (Details 2)

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Properties, net (Details 2) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Properties    
Projects in development or held for future development $ 495,625 $ 511,608
Projects in development or held for future development | Land in development or held for future development
   
Properties    
Projects in development or held for future development 238,904 245,676
Projects in development or held for future development | Construction in progress, excluding land
   
Properties    
Projects in development or held for future development $ 256,721 $ 265,932