Equity Investments in Unconsolidated Joint Ventures - Total Aggregate Fair Value of Acquisitions Allocated and Reflected in Accordance with Accounting Guidance for Business Combinations (Details) - Level 3 - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 10, 2019
Schedule of Equity Method Investments [Line Items]
Land	$ 43,305
Buildings and improvements	97,635
Lease origination costs	26,666
Below market leases	(6,442)
Net assets acquired	187,452
Equity Method Investments | R2G Venture LLC
Schedule of Equity Method Investments [Line Items]
Land		$ 31,578
Buildings and improvements		123,384
Above market leases		6,135
Lease origination costs		18,965
Below market leases		(5,010)
Net assets acquired		$ 175,052
Equity Method Investments | RGMZ Venture REIT LLC
Schedule of Equity Method Investments [Line Items]
Land	62,606
Buildings and improvements	23,120
Above market leases	27,170
Lease origination costs	7,207
Below market leases	(296)
Net assets acquired	$ 119,807