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ACQUISITIONS AND DISPOSITIONS - Additional Information (Details) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Apr. 30, 2025 USD ($) property jointVenture | Mar. 31, 2025 property | Jun. 30, 2025 USD ($) property | Mar. 31, 2025 USD ($) property | Jun. 30, 2024 USD ($) | Mar. 31, 2024 USD ($) | Jun. 30, 2025 USD ($) property land_parcel store | Jun. 30, 2024 USD ($)
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Total transaction value |  |  | $ 448,928 | $ 248,221 | $ 27,741 | $ 35,255 | $ 697,149 | $ 62,996
Assumed debt |  |  | $ 258,000 | $ 0 | 0 | $ 0 | $ 258,000 | 0
Number of operating properties sold |  |  | 1 |  |  |  | 12 |
Proceeds from sale of real estate |  |  | $ 8,900 |  |  |  | $ 133,755 |
Gain (loss) on disposition of assets |  |  | (864) |  |  |  | 38,656 |
Loss on real estate assets held for sale and sold, net |  |  | $ 864 |  | $ 54,659 |  | $ (34,897) | $ 54,659
Number of land parcels sold | land_parcel |  |  |  |  |  |  | 3 |
Number of properties listed for sale | property |  |  |  |  |  |  | 3 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Loss on real estate assets held for sale and sold, net |  |  |  |  |  |  | $ 3,759 |
PR II EXR JV LLC |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Equity Ownership % |  | 25.00% |  | 25.00% |  |  |  |
Number of properties acquired | property |  | 6 |  | 6 |  |  |  |
Number of properties exchanged | property |  | 17 |  | 17 |  |  |  |
Number of properties in portfolio | property |  | 23 |  | 23 |  |  |  |
Ownership percentage after transaction |  | 100.00% |  |  |  |  |  |
PR II EXR JV LLC | Partner |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Number of properties acquired | property |  | 17 |  | 17 |  |  |  |
Number of properties exchanged | property |  | 6 |  | 6 |  |  |  |
Equity ownership percentage exchanged |  | 75.00% |  | 75.00% |  |  |  |
ESS-NYFL JV LP and ESS-CA TIVS JV LP |  |  |  |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |  |  |  |
Value of real estate asset acquired | $ 436,797 |  |  |  |  |  |  |
Assumed debt | $ 258,000 |  |  |  |  |  |  |
Equity Ownership % | 100.00% |  |  |  |  |  |  |
Number of properties acquired | property | 27 |  |  |  |  |  |  |
Number of joint ventures | jointVenture | 2 |  |  |  |  |  |  |

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