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Redeemable Noncontrolling Interests in Operating Partnership (Units Redeemed) (Details) - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Temporary Equity [Line Items]      
Fair value of common units converted $ (3,454) $ (2,201)  
Historical cost $ 3,500    
Operating Partnership Units      
Temporary Equity [Line Items]      
Common units converted to common stock (in shares) 339 165 0
Fair value of common units converted $ 390 $ 2,201 $ 0