Significant Transactions - Narrative (Details)	2 Months Ended	12 Months Ended
	Feb. 15, 2024 USD ($) apartment property	Dec. 31, 2023 USD ($) property	Dec. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($) property	Dec. 31, 2020 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net income (loss) attributable to nonredeemable noncontrolling interest		$ 5,185,000	$ 458,000	$ (3,243,000)
Provision for real estate impairment loss		0	0	0
Interest income		$ 8,314,000	50,264,000	58,651,000
AIMCO
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss					$ 534,000,000
AIMCO | The Note
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Debt instrument, interest rate, stated percentage					5.20%
Interest Income
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Interest income			13,800,000	27,800,000
Other Real Estate
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of apartment communities | property		12
Provision for real estate impairment loss		$ 23,600,000	0	0
Lease Cancellation
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net income (loss) attributable to nonredeemable noncontrolling interest		$ 0	$ 17,300,000	$ 26,000,000
Wholly And Partially Owned Consolidated Properties | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of apartment communities | property		3	18	16
Raleigh North Carolina
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of apartment communities | property		1
Raleigh North Carolina | Subsequent Event
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of apartment communities | property	1
Number of apartment homes | apartment	384
Purchase price	$ 86,500,000
Durham, North Carolina
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of apartment communities | property		1