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Prepaid Expenses and Other Assets, net - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |  |  |
Unrealized loss on non-real estate investments | $ 1.1 | $ 2.2 | $ 3.0 | $ 2.2

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- Definition Non-Real Estate Investments, Unrealized Gain (Loss) On Change In Fair Value + References No definition available. + Details
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Namespace Prefix: | hpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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