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Fair Value of Financial Instruments - Narrative (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($)
Fair Value Disclosures [Abstract] |
Remeasurement to fair value | $ 4,300

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- Definition Contingent Liability, Remeasurement + References No definition available. + Details
Name: | hpp_ContingentLiabilityRemeasurement
Namespace Prefix: | hpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration