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Subsequent Events (Details)		1 Months Ended	6 Months Ended
	Aug. 03, 2022 USD ($)	Jul. 31, 2022 USD ($) home community	Jun. 30, 2022 USD ($) community	Jun. 30, 2021 USD ($)	Aug. 01, 2022	Dec. 31, 2021 USD ($)
Subsequent Event [Line Items]
Number of communities held for sale | community			3
Payments to acquire other real estate			$ 165,117,000	$ 118,572,000
Commercial paper			$ 0			$ 0
Subsequent Event
Subsequent Event [Line Items]
Number of communities sold | community		3
Commercial paper	$ 100,000,000
Subsequent Event | Subsequent Event Dispositions
Subsequent Event [Line Items]
Number of communities held for sale | community		1
Number of apartment homes held-for-sale | home		156
Net real estate		$ 20,362,000
Subsequent Event | Notes payable maturing in 2022 | Secured Debt
Subsequent Event [Line Items]
Fixed interest rate		3.74%			3.73%
Subsequent Event | Avalon Green I, Avalon Green II and Avalon Green III
Subsequent Event [Line Items]
Gross sales price of real estate		$ 306,000,000
Number of apartment homes sold | home		617
Subsequent Event | Avalon Miramar Park Place
Subsequent Event [Line Items]
Number of apartment homes acquired | home		650
Payments to acquire other real estate		$ 295,000,000
Subsequent Event | Avalon Grosvenor Tower | Notes payable maturing in 2022 | Secured Debt
Subsequent Event [Line Items]
Repayments of secured debt		39,060,000
Subsequent Event | Avalon Grosvenor Tower | US Fund
Subsequent Event [Line Items]
Gross sales price of real estate		$ 95,250,000
Number of apartment homes sold | home		237
Subsequent Event | Avalon Station 250 | Notes payable maturing in 2022 | Secured Debt
Subsequent Event [Line Items]
Repayments of secured debt	$ 50,385,000

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