Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Net property	$ 2,912,468			$ 2,966,005
Other assets	131,230			176,747
Other liabilities	48,090			47,573
Debt, net	1,830,589
Equity	1,725,477	$ 1,751,053	$ 1,782,254	1,804,648	$ 1,815,782	$ 1,570,849	$ 1,603,814	$ 1,688,303
Investment In Nonconsolidated Real Estate
Schedule of Equity Method Investments [Line Items]
Net property	1,573,569			1,520,804
Other assets	443,610			488,805
Other liabilities	328,446			333,049
Debt, net	954,213			956,688
Equity	$ 734,520			$ 719,872