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Investment in Real Estate (Details) (Disposal Group, Not Discontinued Operations, First Financial, USD $) In Millions, unless otherwise specified | Mar. 06, 2015
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Disposal Group, Not Discontinued Operations | First Financial |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations |
Discontinued operations, sales price | $ 89.0 us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration / us-gaap_DisposalGroupClassificationAxis = us-gaap_DisposalGroupNotDiscontinuedOperationsMember / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = hpp_FirstFinancialMember

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- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration