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Redeemable Noncontrolling Interests in Operating Partnership (Units Redeemed) (Details) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Temporary Equity [Line Items]        
Fair value of common units converted $ (17)   $ (17) $ (3,454)
Historical cost       $ 3,500
Operating Partnership Units        
Temporary Equity [Line Items]        
Common units converted to common stock (in shares) 2 0 2 339
Fair value of common units converted $ 15 $ 0 $ 15 $ 390