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Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Change in estimate of uncollectable revenues     $ 15,525 $ 41,955
Accounts Receivable        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Change in estimate of uncollectable revenues $ 6,704 $ 36,912 15,525 40,692
Straight line rent receivables $ 2,623 $ 1,088 $ 4,302 $ 2,557