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Interest Capitalized (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Interest Capitalized        
Capitalized interest during the development and redevelopment of real estate assets $ 14,567 $ 17,279 $ 27,731 $ 35,100