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Summary of Significant Accounting Policies - Schedule of variable interest entities (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Variable Interest Entity [Line Items]    
Property, net $ 6,432,877 $ 6,694,579
Total assets 8,643,452 9,184,005
Mortgage notes payable 4,518,108 4,560,810
Total liabilities 5,516,506 6,738,745
Operating Partnership    
Variable Interest Entity [Line Items]    
Property, net 475,184 551,062
Other assets 100,635 97,713
Total assets 575,819 648,775
Mortgage notes payable 413,879 420,233
Other liabilities 59,715 81,266
Total liabilities $ 473,594 $ 501,499