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Deferred Leasing Costs and Intangible Assets, net and Intangible Liabilities, net- Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Deferred Leasing Costs and In-place Lease Intangibles | Foothill Research Center Property |  |  |
Finite-Lived Intangible Assets |  |  |
Impairment loss | $ 2.7 |  |
Trade name |  |  |
Finite-Lived Intangible Assets |  |  |
Impairment loss |  | $ 8.5 |
Below-market Ground Leases | Del Amo |  |  |
Finite-Lived Intangible Assets |  |  |
Impairment loss |  | $ 2.4 | $ 0.4

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