Investments in Partially Owned Entities - Summary of Information on Total Unconsolidated Development Joint Ventures (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($) JointVenture Apartment	Sep. 30, 2021 USD ($)
Variable Interest Entity [Line Items]
Investments in unconsolidated entities - acquisitions	$ 49,330	$ 21,787
Unconsolidated VIE [Member]
Variable Interest Entity [Line Items]
Number of unconsolidated joint ventures | JointVenture	2
Apartment units | Apartment	797
Unconsolidated VIE [Member] | Equity Residential [Member]
Variable Interest Entity [Line Items]
Investments in unconsolidated entities - acquisitions	$ 49,330