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Summary of Significant Accounting Policies - Schedule of Costs Capitalized (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Accounting Policies [Abstract] |  |  |
Capitalized personnel costs | $ 13,692 | $ 16,496 | $ 18,098
Capitalized interest | $ 40,367 | $ 32,253 | $ 18,031

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- Definition Capitalized Costs, Personnel + References No definition available. + Details
Name: | hpp_CapitalizedCostsPersonnel
Namespace Prefix: | hpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- Definition Amount of interest costs capitalized disclosed as an adjusting item to interest costs incurred. + References No definition available. + Details
Name: | us-gaap_InterestCostsCapitalizedAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration