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Future Minimum Rents and Lease Payments - Rental Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Leases [Abstract] |  |  |  |
Variable rental expense | $ 2,765 | $ 2,427 | $ 7,873 | $ 6,683
Minimum rental expense | $ 5,421 | $ 4,991 | $ 15,963 | $ 14,973

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- Definition Operating Lease, Expense, Minimum + References No definition available. + Details
Name: | hpp_OperatingLeaseExpenseMinimum
Namespace Prefix: | hpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Operating Lease, Expense, Minimum, Contingent + References No definition available. + Details
Name: | hpp_OperatingLeaseExpenseMinimumContingent
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_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration