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Investments in Partially Owned Entities - Summary of Information on Total Unconsolidated Development Joint Ventures (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) ApartmentUnit JointVenture | Dec. 31, 2022 USD ($) ApartmentUnit JointVenture | Dec. 31, 2021 USD ($)
Variable Interest Entity [Line Items] |  |  |
Investments in unconsolidated entities - acquisitions | $ 2,800 | $ 49,855 | $ 48,534
Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Number of unconsolidated joint ventures | JointVenture | 2 | 3 |
Apartment units | ApartmentUnit | 638 | 1,019 |
Variable Interest Entity, Not Primary Beneficiary [Member] | Equity Residential [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Investments in unconsolidated entities - acquisitions | $ 2,800 | $ 49,855 |

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