Investments in Partially Owned Entities - Summary of Company's Consolidated Joint Ventures (Details)	Dec. 31, 2021 Property ApartmentUnit Project
Variable Interest Entity [Line Items]
Properties | Property	310
Apartment units	80,407
Consolidated VIE [Member] | Operating Properties [Member]
Variable Interest Entity [Line Items]
Properties | Property	16
Apartment units	3,546
Consolidated VIE [Member] | Project Under Development [Member]
Variable Interest Entity [Line Items]
Project | Project	1
Apartment units	312