Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Net property	$ 2,917,283		$ 2,966,005
Other assets	178,903		176,747
Other liabilities	45,942		47,573
Debt, net	1,888,591
Equity	1,751,053	$ 1,782,254	1,804,648	$ 1,570,849	$ 1,603,814	$ 1,688,303
Investment In Nonconsolidated Real Estate
Schedule of Equity Method Investments [Line Items]
Net property	1,559,984		1,520,804
Other assets	455,093		488,805
Other liabilities	324,936		333,049
Debt, net	955,310		956,688
Equity	$ 734,831		$ 719,872