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Equity Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Class of Stock [Line Items]        
Income attributable to noncontrolling interests $ (1,880) $ (3,518) $ (5,445) $ (7,148)
Series D Cumulative Redeemable Preferred Stock        
Class of Stock [Line Items]        
Depositary shares outstanding (in shares) 3.0   3.0  
Depository shares to cumulative redeemable preferred stock ratio     1.00%  
Cumulative redeemable preferred stock liquidation preference (in usd per share) $ 25.00   $ 25.00  
Annual dividend on depositary shares (in usd per share)     $ 1.53125  
Percentage of redeemable preferred stock     6.125%  
Series E Cumulative Redeemable Preferred Stock        
Class of Stock [Line Items]        
Depositary shares outstanding (in shares) 4.4   4.4  
Depository shares to cumulative redeemable preferred stock ratio     1.00%  
Cumulative redeemable preferred stock liquidation preference (in usd per share) $ 25.00   $ 25.00  
Annual dividend on depositary shares (in usd per share)     $ 1.50  
Percentage of redeemable preferred stock     6.00%