Real Estate Disposition Activities (Details) ft² in Thousands, $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2024 USD ($) ft² home residential_condominium community	Sep. 30, 2024 USD ($) home	Jun. 30, 2024 USD ($) home	Dec. 31, 2024 USD ($) ft² community residential_condominium home	Dec. 31, 2023 USD ($) residential_condominium home ft²	Dec. 31, 2022 USD ($) home residential_condominium ft²
Summary of income from discontinued operations
Gain on sale of communities				$ 363,300	$ 287,424	$ 555,558
Number of communities held for sale | community	1			1
Number of residential condominiums sold | residential_condominium				1	6	40
Other selling, general and administrative expense				$ 30	$ 389	$ 2,129
Number of residential condominiums remaining to be sold | residential_condominium	1			1
Inventory, real estate	$ 2,743			$ 2,743	6,603
The Park Loggia Commercial
Summary of income from discontinued operations
Net cash proceeds				$ 4,166	25,387	126,848
Commercial square feet | ft²	66			66
Number of residential units in development | residential_condominium	172			172
Gain on for-sale condominiums				$ (76)	$ (73)	$ 2,217
AVA Belltown
Summary of income from discontinued operations
Number of apartment homes sold | home			100
Gross sales price			$ 34,000
Net cash proceeds			$ 32,343
Commercial square feet | ft²	1			1
AVA North Hollywood
Summary of income from discontinued operations
Number of apartment homes sold | home			156
Gross sales price			$ 62,100
Net cash proceeds			$ 57,215
Commercial square feet | ft²	11			11
Avalon Hackensack at Riverside
Summary of income from discontinued operations
Number of apartment homes sold | home			226
Gross sales price			$ 85,600
Net cash proceeds			$ 83,878
AVA Theater District
Summary of income from discontinued operations
Number of apartment homes sold | home		398
Gross sales price		$ 212,000
Net cash proceeds		$ 209,893
Avalon Darien
Summary of income from discontinued operations
Number of apartment homes sold | home		189
Gross sales price		$ 120,000
Net cash proceeds		$ 118,029
Avalon New Canaan
Summary of income from discontinued operations
Number of apartment homes sold | home	104
Gross sales price	$ 75,000
Net cash proceeds	$ 74,113
Avalon Berkeley
Summary of income from discontinued operations
Number of apartment homes sold | home	94
Gross sales price	$ 32,000
Net cash proceeds	$ 31,033
AVA Ballard
Summary of income from discontinued operations
Number of apartment homes sold | home	265
Gross sales price	$ 105,500
Net cash proceeds	$ 100,115
Commercial square feet | ft²	12			12
Other real estate
Summary of income from discontinued operations
Gross sales price				$ 0
Net cash proceeds				$ 784
Wholly owned properties
Summary of income from discontinued operations
Number of apartment homes sold | home				1,532	987	2,062
Gross sales price				$ 726,200	$ 446,000	$ 953,135
Net cash proceeds				$ 707,403	$ 440,209	$ 934,117
Commercial square feet | ft²	24			24	27	0