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Investments in Unconsolidated Joint Ventures - Acquisition, Development and Construction Arrangements/Sale of Joint Venture Interest or Property (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Oct. 31, 2016
Schedule of Equity Method Investments [Line Items]        
Equity method investments $ 2,848,363   $ 2,912,842  
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate $ 0 $ 17,166    
Stonehenge Portfolio        
Schedule of Equity Method Investments [Line Items]        
Ownership Interest       90.00%