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Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

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Investments - Narrative (Details) ft² in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) ft² home community investor	Dec. 31, 2020 USD ($) community	Dec. 31, 2019 USD ($) home community	Dec. 31, 2018 community ft² home
Schedule of Equity Method Investments [Line Items]
Number of real estate properties \| community	278
Preferred interest obligation redemption and dividends	$ (1,340)	$ (1,000)	$ (1,400)
Number of units in real estate property \| home	81,803
Number of communities acquired \| community	7	0	5
Gain on sale of communities	$ 602,235	$ 340,444	$ 166,105
Number of apartment homes acquired \| home			1,175
Payments to acquire other real estate	$ 771,692	$ 0	$ 420,517
AVA North Point
Schedule of Equity Method Investments [Line Items]
Payments to acquire other real estate			71,280
Avalon Arundel Crossing East
Schedule of Equity Method Investments [Line Items]
Number of apartment homes acquired \| home	384
Payments to acquire other real estate	$ 119,000
Avalon Lakeside
Schedule of Equity Method Investments [Line Items]
Number of apartment homes acquired \| home	425
Payments to acquire other real estate	$ 117,000
Commercial square feet \| ft²	18
Hub South End
Schedule of Equity Method Investments [Line Items]
Number of apartment homes acquired \| home	265
Payments to acquire other real estate	$ 104,350
Commercial square feet \| ft²	23
Three30Five
Schedule of Equity Method Investments [Line Items]
Number of apartment homes acquired \| home	164
Payments to acquire other real estate	$ 52,650
Avalon Fort Lauderdale
Schedule of Equity Method Investments [Line Items]
Number of apartment homes acquired \| home	243
Payments to acquire other real estate	$ 150,000
Commercial square feet \| ft²	49
Avalon Miramar
Schedule of Equity Method Investments [Line Items]
Number of apartment homes acquired \| home	380
Payments to acquire other real estate	$ 133,000
Hawk
Schedule of Equity Method Investments [Line Items]
Number of apartment homes acquired \| home	71
Payments to acquire other real estate	$ 48,500
2019 Acquisitions
Schedule of Equity Method Investments [Line Items]
Payments to acquire other real estate			$ 345,450
US Fund
Schedule of Equity Method Investments [Line Items]
Ownership percentage of equity method investment	28.60%
Number of apartment communities sold \| community		1	1
Number of real estate properties \| community	3
Equity method investments	$ 18,706
US Fund \| Avalon Venice on Rose
Schedule of Equity Method Investments [Line Items]
Realized gain (loss) on disposal of equity method investment		$ 5,157
US Fund \| Avalon Marina Bay
Schedule of Equity Method Investments [Line Items]
Realized gain (loss) on disposal of equity method investment			$ 5,788
ACJV
Schedule of Equity Method Investments [Line Items]
Ownership percentage of equity method investment	20.00%
Equity method investments	$ 2,579
Proceeds from sale of real estate	325,000
ACJV \| Avalon North Point and Avalon North Point Lofts
Schedule of Equity Method Investments [Line Items]
Realized gain (loss) on disposal of equity method investment	$ 23,305
Number of apartment homes sold \| home	529
Legacy JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage of equity method investment	40.00%
Preferred interest obligation liquidation value	$ 34,468
AVA North Point
Schedule of Equity Method Investments [Line Items]
Ownership percentage of equity method investment			55.00%
Number of units in real estate property \| home	265
AVA North Point \| Joint Venture Partner
Schedule of Equity Method Investments [Line Items]
Ownership percentage of equity method investment			45.00%
NYC JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage of equity method investment	20.00%
Equity method investments	$ 61,307
MVPI LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage of equity method investment	25.00%
Number of units in real estate property \| home	313
Long-term debt, gross	$ 103,000
Brandywine
Schedule of Equity Method Investments [Line Items]
Ownership percentage of equity method investment	28.70%
Equity method investments	$ 16,010
Number of units in real estate property \| home	305
Long-term debt, gross	$ 20,379
Number of members who hold various interests in joint venture \| investor	5
Avalon Alderwood Mall
Schedule of Equity Method Investments [Line Items]
Ownership percentage of equity method investment	50.00%
Equity method investments	$ 55,054
Number of units in real estate property \| home	328
AVA Arts District
Schedule of Equity Method Investments [Line Items]
Ownership percentage of equity method investment	25.00%
Equity method investments	$ 30,436
Number of units in real estate property \| home	475
Percent of development funded by borrowing	60.00%
Long-term construction loan	$ 167,147
Proceeds from construction loans payable	$ 11,581
Commercial square feet \| ft²	56
Property Technology Investments
Schedule of Equity Method Investments [Line Items]
Other commitment	$ 39,890
Gain (loss) on equity securities	(15,908)
Equity Method Investments and Equity Securities	$ 17,277
NYC JV
Schedule of Equity Method Investments [Line Items]
Retail square feet sold \| ft²				58
ACJV
Schedule of Equity Method Investments [Line Items]
Number of apartment communities sold \| community	2
NYC JV
Schedule of Equity Method Investments [Line Items]
Number of apartment communities sold \| community				5
Number of apartment homes sold \| home				1,301
Notes Payable Maturities 2021 \| Secured notes \| Avalon North Point and Avalon North Point Lofts
Schedule of Equity Method Investments [Line Items]
Repayments of secured debt	$ 111,653