Quarterly report pursuant to Section 13 or 15(d)

Properties, net (Details 2)

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Properties, net (Details 2) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Properties    
Projects in development or held for future development $ 521,991 $ 545,426
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 221,655 214,977
Projects in development or held for future development | Construction in progress, excluding land    
Properties    
Projects in development or held for future development $ 300,336 $ 330,449