Investments in Partially Owned Entities - Summary of Company's Unconsolidated Joint Ventures Deemed to be VIEs (Details)	Dec. 31, 2021 ApartmentUnit Project Entity
Variable Interest Entity [Line Items]
Apartment units	80,407
Unconsolidated VIE [Member] | Operating Property [Member]
Variable Interest Entity [Line Items]
Entity | Entity	1
Unconsolidated VIE [Member] | Projects Under Development [Member]
Variable Interest Entity [Line Items]
Project | Project	3
Apartment units	929
Unconsolidated VIE [Member] | Land Held For Development [Member]
Variable Interest Entity [Line Items]
Project | Project	3
Apartment units	1,005