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Basis of Presentation and Summary of Significant Accounting Policies - Redeemable Noncontrolling Interests (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]            
Net income allocable to redeemable noncontrolling interests $ 100 $ 532 $ 116      
Distributions declared to redeemable noncontrolling interests 0 0 0      
Redeemable Noncontrolling Interests            
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]            
Redeemable noncontrolling interests balance January 1 52,574 45,743 72,104      
Net income allocable to redeemable noncontrolling interests 100 532 116      
Distributions declared to redeemable noncontrolling interests (1,533) (3,191) (3,788)      
Acquisition of partners' interests in Territory joint venture 0 0 (22,461)      
Other, net including adjustments to redemption value (7,866) 9,490 (228)      
Total limited partners' interests in Operating Partnership and other redeemable noncontrolling interests balance at December 31 43,275 52,574 45,743      
Total limited partners' interests in Operating Partnership and other redeemable noncontrolling interests balance at December 31 52,574 45,743 45,743 $ 43,275 $ 52,574 $ 45,743
Redeemable Noncontrolling Interests | Partnership Interest            
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]            
Redeemable noncontrolling interests balance January 1 52,574 45,743        
Total limited partners' interests in Operating Partnership and other redeemable noncontrolling interests balance at December 31 43,275 52,574 45,743      
Limited partners' interests in Operating Partnership       33,205 42,504 35,673
Other redeemable noncontrolling interests in certain subsidiaries       10,070 10,070 10,070
Total limited partners' interests in Operating Partnership and other redeemable noncontrolling interests balance at December 31 $ 52,574 $ 45,743 $ 45,743 $ 43,275 $ 52,574 $ 45,743