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Organization and Basis of Presentation - Narrative (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 USD ($) apartment community building partnership investment shares | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) apartment community building partnership investment shares | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) partnership community investment shares
Real Estate Properties [Line Items] |  |  |  |  |
Apartment communities owned (in communities) | community | 255 |  | 255 |  |
Apartment units owned (in apartments) | apartment | 62,510 |  | 62,510 |  |
Ownership interest, number of commercial buildings (in commercial buildings) | building | 3 |  | 3 |  |
Marketable securities | $ 100 |  | $ 100 |  | $ 100
DownREIT limited partnerships consolidated by company (in partnerships) | partnership | 18 |  | 18 |  | 18
Communities within DownREIT partnerships (in communities) | community | 9 |  | 9 |  | 9
Number of previously consolidated co-investments considered VIE (in investments) | investment | 6 |  | 6 |  | 6
Assets related to variable interest entities net of intercompany eliminations | $ 964,300 |  | $ 964,300 |  | $ 956,700
Liabilities related to variable interest entities net of intercompany eliminations | 322,600 |  | 322,600 |  | 324,500
Noncontrolling interest in variable interest entity | 120,700 |  | 120,700 |  | 121,100
Fixed rate debt carrying amount | 5,600,000 |  | 5,600,000 |  | 5,700,000
Fixed rate debt fair value | 5,200,000 |  | 5,200,000 |  | 5,300,000
Variable rate debt, carrying amount | 649,300 |  | 649,300 |  | 520,000
Variable rate debt fair value | 647,300 |  | 647,300 |  | 519,000
Capitalized internal costs related to development and redevelopment projects | 4,900 | $ 4,600 | 10,200 | $ 9,400 |
Redeemable noncontrolling interest | $ 33,889 |  | 33,889 |  | $ 32,205
Gain contingencies from legal settlements |  |  | $ 42,500 | $ 7,700 |
Minimum |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Apartment lease term | 9 months |  | 9 months |  |
Maximum |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Apartment lease term | 12 months |  | 12 months |  |
Essex Portfolio, L.P. |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Operating partnership units outstanding (in shares) | shares | 2,258,812 |  | 2,258,812 |  | 2,258,812
Redemption value of operating partnership units outstanding | $ 614,800 |  | $ 614,800 |  | $ 560,000
Redeemable noncontrolling interest | $ 33,889 |  | $ 33,889 |  | $ 32,205
Partnership Interest |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Ownership interest in partnership |  |  | 96.60% |  | 96.60%

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