Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Net property	$ 2,916,395	$ 2,966,005
Other assets	185,844	176,747
Other liabilities	49,796	47,573
Debt, net	1,843,593
Equity	1,782,254	1,804,648	$ 1,603,814	$ 1,688,303
Investment In Nonconsolidated Real Estate
Schedule of Equity Method Investments [Line Items]
Net property	1,550,425	1,520,804
Other assets	473,771	488,805
Other liabilities	325,162	333,049
Debt, net	956,208	956,688
Equity	$ 742,826	$ 719,872