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Noncontrolling Interests - Variable interest entity (Details) - Accounting Standards Update ("ASU") 2015-02 - Consolidation (Topic 810): Amendments to the Consolidation Analysis - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Variable interest entity    
Net real estate $ 3,041,765 $ 3,033,180
Total assets 3,525,643 3,529,667
Total debt 241,044 389,105
Total liabilities $ 342,149 $ 478,955