Investments in Partially Owned Entities - Summary of Company's Investment in Unconsolidated Entities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	$ 79,429	$ 52,782
Real Estate Technology [Member]
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	18,127	14,866
Other [Member]
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	(277)	(372)
Unconsolidated VIE [Member] | Operating Property [Member]
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	$ 36,652	$ 38,288
Ownership Percentage	33.30%
Unconsolidated VIE [Member] | Projects Under Development [Member]
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	$ 24,927