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Share Transactions - Issuance of preferred shares (Details) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
 1 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Class of Stock [Line Items]      
Proceeds from issuance of preferred shares, net   $ 0 $ 485,821
Depositary Series G Preferred Stock      
Class of Stock [Line Items]      
Preferred shares issued $ 500,000    
Preferred shares, dividend rate (as a percent) 4.55%    
Preferred shares, par value per share $ 0.01   $ 0.01
Liquidation preference per share 25,000   25,000
Preferred shares, redemption price per share $ 25,000   25,000
Series G Depositary Share Equivalent      
Class of Stock [Line Items]      
Preferred shares issued $ 500,000    
Preference shares, number of shares issued 20.0    
Liquidation preference per share $ 25   25
Preferred shares, redemption price per share $ 25   $ 25
Proportionate interest of preference shares (per depositary share) 0.10%   0.10%