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Shareholders' Equity / Partners' Capital - Common Stock Offerings (Details) - USD ($)
1 Months Ended 3 Months Ended 8 Months Ended 9 Months Ended
May 31, 2021
Sep. 30, 2021
Sep. 30, 2020
May 21, 2022
Sep. 30, 2021
Sep. 30, 2020
Jun. 30, 2020
Class of Stock [Line Items]              
Proceeds from issuance of Class A common shares         $ 593,040,000 $ 414,100,000  
Offering cost         $ 200,000 $ 600,000  
Class A common shares/units              
Class of Stock [Line Items]              
Number of shares sold (in shares)   11,400,000          
Proceeds from sale of stock   $ 399,000,000          
Remaining shares available (in shares)   1,845,000     1,845,000    
Public Stock Offering | Class A common shares/units              
Class of Stock [Line Items]              
Number of shares sold (in shares) 18,745,000            
Par value (in dollars per share) $ 0.01            
Public Stock Offering - Issued Directly By The Company | Class A common shares/units              
Class of Stock [Line Items]              
Number of shares sold (in shares) 5,500,000            
Proceeds from sale of stock $ 194,000,000            
Offering cost $ 200,000            
Public Stock Offering - Forward Sales Agreement | Class A common shares/units              
Class of Stock [Line Items]              
Number of shares sold (in shares) 13,245,000            
Public Stock Offering - Forward Sales Agreement | Class A common shares/units | Forecast              
Class of Stock [Line Items]              
Proceeds from sale of stock       $ 64,600,000      
At the Market - Common Share Offering Program | Class A common shares/units              
Class of Stock [Line Items]              
Shares authorized for future issuance, value             $ 500,000,000
Shares issued (in shares)   86,130,000,000 86,130   86,130,000,000 86,130  
Proceeds from issuance of Class A common shares     $ 2,400,000     $ 2,400,000  
Offering cost     $ 400,000     $ 400,000  
Shares available for future issuance, value   $ 497,600,000     $ 497,600,000