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Basis of Presentation, Consolidation, Investments in Joint Ventures, and Noncontrolling Interests - Noncontrolling Interests (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]        
Beginning Balance     $ 698 $ 698
Net income allocable to noncontrolling interests,   excluding redeemable noncontrolling interests $ (40) $ (382) 148 (10)
Ending Balance $ 698 $ 698 698 698
Excluding Redeemable Non-Controlling Interests        
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]        
Net income allocable to noncontrolling interests,   excluding redeemable noncontrolling interests     $ 0 $ 0