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Significant Transactions During the Nine Months Ended September 30, 2025 - Narrative (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Aug. 31, 2025 USD ($) | Jul. 31, 2025 USD ($) apartment extensionOption | May 31, 2025 USD ($) extensionOption | Aug. 31, 2022 USD ($) | Sep. 30, 2025 USD ($) investment | Jun. 30, 2025 USD ($) | Mar. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) apartment | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) investment | Sep. 30, 2024 USD ($) | Apr. 30, 2025 USD ($) | Feb. 28, 2025 USD ($)
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equity method investments |  |  |  |  |  |  |  |  |  | $ 31,024 | $ 4,977 |  |
Cash proceeds |  |  |  |  | $ 71,400 |  |  |  |  |  |  |  |
Number of investments with a commitment to fund | investment |  |  |  |  | 3 |  |  |  |  | 3 |  |  |
Proceeds from preferred equity investment |  |  |  |  |  | $ 14,100 | $ 9,900 |  |  | $ 64,125 | 35,096 |  |
Co-investments |  |  |  |  | $ 808,238 |  |  | $ 935,014 |  | 808,238 |  |  |
Gain on remeasurement of co-investment |  |  |  |  | 0 |  |  |  | $ 31,583 | 330 | 169,909 |  |
Debt instrument face amount |  |  |  |  | 550,000 |  |  |  |  | 550,000 |  |  |
Long-term debt |  |  |  |  | 6,448,334 |  |  |  |  | $ 6,448,334 |  |  |
Related Party |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notes receivable |  |  |  | $ 11,200 |  |  |  |  |  |  |  |  |
Notes receivable, interest rate |  |  |  | 9.50% |  |  |  |  |  |  |  |  |
Related Party Bridge Loan On Property Acquired By Wesco I | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notes receivable | $ 81,200 |  |  |  |  |  |  |  |  |  |  |  |
Notes receivable, interest rate | 5.50% |  |  |  |  |  |  |  |  |  |  |  |
Wesco VII LLC |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equity method investments |  | $ 50,000 |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  | 50.00% |  |  |  |  |  |  |  |  |  |  |
Preferred equity investment |  | $ 42,600 |  |  |  |  |  |  |  |  |  |  |
Number of units in real estate property | apartment |  | 480 |  |  |  |  |  |  |  |  |  |  |
Preferred return rate |  | 13.50% |  |  |  |  |  |  |  |  |  |  |
Stabilized Apartment Home Community Located In Oakland |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured notes at maturity |  |  |  |  |  |  |  | 72,000 |  |  |  |  |
Co-investments |  |  |  |  |  |  |  | $ 22,700 |  |  |  |  |
Apartment homes | apartment |  |  |  |  |  |  |  | 241 |  |  |  |  |
Value of property held |  |  |  |  |  |  |  | $ 95,000 |  |  |  |  |
Gain on remeasurement of co-investment |  |  |  |  |  |  |  | 300 |  |  |  |  |
Preferred Equity Investment Property In Southern California And Washington |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Early redemption fee |  |  |  |  | $ 100 |  |  |  |  |  |  |  |
Number of investments with a commitment to fund | investment |  |  |  |  | 1 |  |  |  |  | 1 |  |  |
Essex Portfolio, L.P. |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equity method investments |  |  |  |  |  |  |  |  |  | $ 31,024 | 4,977 |  |
Proceeds from preferred equity investment |  |  |  |  |  |  |  |  |  | 64,125 | 35,096 |  |
Co-investments |  |  |  |  | $ 808,238 |  |  | 935,014 |  | 808,238 |  |  |
Gain on remeasurement of co-investment |  |  |  |  | 0 |  |  |  | $ 31,583 | 330 | $ 169,909 |  |
Interest Rate Swap |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative hedged item |  |  | $ 247,500 |  |  |  |  |  |  |  |  |  |
Interest rate |  |  | 4.10% |  |  |  |  |  |  |  |  |  |
Commercial Paper |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term |  |  | 397 days |  |  |  |  |  |  |  |  |  |
Maximum amount authorized |  |  | $ 750,000 |  |  |  |  |  |  |  |  |  |
Unsecured Term Loan 0.850%, Due May 2028 | Unsecured debt |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  | 0.85% |  |  |  |  |  |  |  |  |  |
Number of extensions | extensionOption |  |  | 2 |  |  |  |  |  |  |  |  |  |
Option term |  |  | 1 year |  |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  | 250,000 |  |  |  |  | 250,000 |  |  |
Unsecured Term Loan 0.850%, Due May 2028 | Unsecured debt | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  | $ 600,000 |  |  |  |  |  |  |  |  |  |
Unsecured Bonds 5.375%, Due April 2035 | Unsecured debt | Essex Portfolio, L.P. |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured notes at maturity |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 |
Interest rate |  |  |  |  |  |  |  |  |  |  |  |  | 5.375%
Debt instrument face amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000
Debt instrument, debt offering price, percentage of principal |  |  |  |  |  |  |  |  |  |  |  |  | 99.604%
Lines of credit | New Credit Facility | Unsecured debt |  |  |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate borrowing capacity |  | $ 1,200,000 |  |  | 1,500,000 |  |  |  |  | 1,500,000 |  |  |
Interest rate |  | 0.775% |  |  |  |  |  |  |  |  |  |  |
Number of extensions | extensionOption |  | 2 |  |  |  |  |  |  |  |  |  |  |
Option term |  | 6 months |  |  |  |  |  |  |  |  |  |  |
Option to increase |  | $ 2,500,000 |  |  |  |  |  |  |  |  |  |  |
Line of credit facility increase amount |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  |  |  | $ 1,580,000 |  |  | $ 1,280,000 |  | $ 1,580,000 |  |  |

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