Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity (Common Stock And Units And Equity Stock) (Narrative) (Details)

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Shareholders' Equity (Common Stock And Units And Equity Stock) (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Shareholders' Equity [Abstract]      
Distributions paid to common shareholders $ 28,872 $ 28,817  
Dividends paid per common share $ 1.05 $ 1.05  
Distributions paid to noncontrolling interests — common units $ 7,671 $ 7,671  
Dividends paid per common unit $ 1.05 $ 1.05  
Equity stock, shares authorized 100,000,000.0    
Equity stock, shares issued 0   0