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DISPOSITIONS AND IMPAIRMENT CHARGES - Additional Information (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Oct. 24, 2023 USD ($) ft² | Dec. 31, 2023 USD ($) ft² lease | Dec. 31, 2022 USD ($) ft² | Dec. 31, 2021 USD ($) groundLease
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Impairment charges |  | $ 477 | $ 0 | $ 0
Number of properties subject to ground leases | lease |  | 12 |  |
Net proceeds from sales of operating properties |  | $ 137,687 | $ 75,699 | $ 26,556
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Gain on sales of operating properties, net
Disposal Group, Held-for-Sale, Not Discontinued Operations | Eastside |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Impairment charges |  | $ 500 |  |
Square footage | ft² |  | 43,640 |  |
Real estate investment, fair value |  | $ 14,100 |  |
Disposed of by sale |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Square footage | ft² |  | 578,495 | 100,016 |
Sales price |  | $ 142,050 | $ 75,550 |
Number of properties subject to ground leases | groundLease |  |  |  | 17
Net proceeds from sales of operating properties |  |  |  | $ 42,000
Gain on disposal |  | $ 22,601 | $ 27,069 | $ 27,600
Disposed of by sale | Eastside |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Square footage | ft² | 43,640 |  |  |
Sales price | $ 14,425 |  |  |
Gain on disposal | $ 0 |  |  |

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