Real Estate Disposition Activities (Details) ft² in Thousands, $ in Thousands	3 Months Ended			12 Months Ended			36 Months Ended
	Dec. 31, 2022 USD ($) residential_condominium ft² home community	Sep. 30, 2022 USD ($) home	Mar. 31, 2022 USD ($) home	Dec. 31, 2022 USD ($) residential_condominium home ft² community	Dec. 31, 2021 USD ($) ft² home residential_condominium	Dec. 31, 2020 USD ($) residential_condominium ft² home	Dec. 31, 2022 USD ($) residential_condominium ft² community
Summary of income from discontinued operations
Gain on sale of communities				$ 555,558	$ 602,235	$ 340,444
Number of communities held for sale | community	0			0			0
Commercial square feet | ft²	16			16	90	0	16
Number of residential condominiums sold | residential_condominium				40	53	70	163
Gain on for-sale condominiums				$ 2,217	$ 3,110	$ 8,213
Number of residential condominiums remaining to be sold | residential_condominium	9			9			9
Other selling, general and administrative expense				$ 2,129	4,087	$ 5,662
For-sale condominium inventory	$ 32,532			32,532	$ 146,535		$ 32,532
Avalon West Long Branch
Summary of income from discontinued operations
Number of apartment homes sold | home			180
Gross sales price			$ 75,000
Net cash proceeds			$ 73,286
Avalon Ossining
Summary of income from discontinued operations
Number of apartment homes sold | home			168
Gross sales price			$ 70,000
Net cash proceeds			$ 69,298
Avalon East Norwalk
Summary of income from discontinued operations
Number of apartment homes sold | home			240
Gross sales price			$ 90,000
Net cash proceeds			$ 87,996
Avalon Green I/Avalon Green II/Avalon Green III
Summary of income from discontinued operations
Number of apartment homes sold | home		617
Gross sales price		$ 306,000
Net cash proceeds		$ 303,209
Avalon Del Mar Station
Summary of income from discontinued operations
Number of apartment homes sold | home		347
Gross sales price		$ 172,300
Net cash proceeds		$ 170,226
Avalon Sharon
Summary of income from discontinued operations
Number of apartment homes sold | home		156
Gross sales price		$ 65,650
Net cash proceeds		$ 64,671
Avalon Park Crest
Summary of income from discontinued operations
Number of apartment homes sold | home	354
Gross sales price	$ 145,500
Net cash proceeds	$ 143,340
Other real estate
Summary of income from discontinued operations
Gross sales price				28,685
Net cash proceeds				22,091
Wholly owned properties
Summary of income from discontinued operations
Gain on sale of communities				$ 555,558
Number of apartment homes sold | home				2,062	2,404	1,817
Gross sales price				$ 953,135	$ 875,058	$ 634,250
Net cash proceeds				934,117	850,230	619,773
The Park Loggia
Summary of income from discontinued operations
Net cash proceeds				$ 126,848	135,458	216,372
Number of residential units in development | residential_condominium	172			172			172
Commercial square feet | ft²	66			66			66
Gain on for-sale condominiums				$ 2,217	$ 3,110	$ 8,213