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Summary of Critical and Significant Accounting Policies - Narrative (Details) | 12 Months Ended |
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Dec. 31, 2023 USD ($) community partnership investment property shares | Dec. 31, 2022 USD ($) community property partnership investment shares | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Accounting Policies [Abstract] |  |  |  |
Limited partner - ownership percentage | 3.40% | 3.40% |  |
Threshold useful life of assets for capitalization | 1 year |  |  |
Acquired in-place lease value, net | $ 6,100,000 | $ 7,400,000 |  |
Number of properties held-for-sale | property | 0 | 0 |  |
Casualty loss | $ 0 | $ 0 | $ 0 |
Lease term, minimum | 9 months |  |  |
Lease term, maximum | 12 months |  |  |
Original maturities highly liquid investments term classification as cash equivalents, maximum | 3 months |  |  |
Equity securities, FV-NI | $ 100,000 | 200,000 |  |
Capitalized internal costs related to development and redevelopment projects | 19,500,000 | 20,400,000 | 23,600,000 |
Fixed rate debt carrying amount | 5,700,000,000 | 5,700,000,000 |  |
Fixed rate debt fair value | 5,300,000,000 | 5,200,000,000 |  |
Variable rate debt carrying amount | 520,000,000 | 274,200,000 |  |
Variable rate debt fair value | 519,000,000 | 273,200,000 |  |
Redeemable noncontrolling interest | $ 32,205,000 | $ 27,150,000 | 34,666,000 | $ 32,239,000
DownREIT limited partnerships consolidated by company (in partnerships) | partnership | 18 | 18 |  |
Communities within DownREIT partnerships (in communities) | community | 9 | 9 |  |
Number of consolidated co-investments that now meet the definition of a VIE | investment | 6 | 6 |  |
Assets related to variable interest entities net of intercompany eliminations | $ 956,700,000 | $ 939,400,000 |  |
Liabilities related to variable interest entities net of intercompany eliminations | 324,500,000 | 324,300,000 |  |
Noncontrolling interests in VIE | $ 121,100,000 | $ 121,500,000 |  |
Number of common stock shares per unit basis (in shares) | shares | 1 |  |  |
Units of limited partnership interest amount (in shares) | shares | 936,343 | 938,513 |  |
Redemption value of variable interest entities | $ 232,200,000 | $ 198,900,000 |  |
Redeemable noncontrolling interest, units of limited partners' interests in DownREIT VIEs | 12,100,000 | 9,200,000 |  |
Noncontrolling interest in limited partnerships | 97,000,000 | 97,000,000 |  |
Employee retention credit | $ 0 | $ 4,100,000 | $ 4,200,000 |

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