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Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Change in estimate of uncollectable revenues     $ 8,362 $ 55,369
Accounts Receivable        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Change in estimate of uncollectable revenues $ 6,593 $ 13,771 8,362 54,463
Straight line rent receivables $ 2,635 $ 2,581 $ 1,666 $ 5,137