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Related Party Transactions (Details) $ in Millions	Oct. 09, 2018 USD ($)
Ferry Building Property
Related Party Transaction [Line Items]
Payments to acquire new property	$ 291.0

X

- Definition

Asset Acquisition, Consideration Transferred

+ References

No definition available.

+ Details

Name:	hpp_AssetAcquisitionConsiderationTransferred
Namespace Prefix:	hpp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=hpp_FerryBuildingPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: