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Equity - Narrative (Details) (USD $) | 1 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended |  |  |  |
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Oct. 31, 2013 common_unit_holder | Dec. 31, 2012 common_unit_holder | Feb. 28, 2012 common_unit_holder | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jan. 28, 2014 | Feb. 12, 2013 | May 03, 2012 | Dec. 31, 2013 | Jan. 23, 2012 | Dec. 31, 2010 | May 18, 2012 | Jan. 02, 2014 | Feb. 29, 2012 | Oct. 30, 2013 | Sep. 30, 2013 | Dec. 31, 2011
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, common units outstanding (in shares) |  |  |  | 2,382,563 hpp_NoncontrollingInterestOwnershipByNoncontrollingOwnersAmount |  |  |  |  |  |  |  |  |  |  | 2,610,941 hpp_NoncontrollingInterestOwnershipByNoncontrollingOwnersAmount |  |  |
Number of common unit holders | 1 hpp_NumberofCommonUnitHolders | 1 hpp_NumberofCommonUnitHolders | 1 hpp_NumberofCommonUnitHolders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, decrease from redemptions or purchase of interests (in shares) |  | 72,500 hpp_NoncontrollingInterestDecreaseFromRedemptionsOrPurchaseOfInterestsAmount | 155,878 hpp_NoncontrollingInterestDecreaseFromRedemptionsOrPurchaseOfInterestsAmount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative value of shares sold under program to date |  |  |  | 14,500,000 hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardSharesSoldUnderProgramtoDateValue |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock |  |  |  | $ 197,468,000 us-gaap_ProceedsFromIssuanceOfCommonStock | $ 202,542,000 us-gaap_ProceedsFromIssuanceOfCommonStock | $ 190,798,000 us-gaap_ProceedsFromIssuanceOfCommonStock |  |  |  |  |  |  |  |  |  |  |  |
Conversion of convertible securities (in shares) |  | 72,500 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities | 155,878 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common dividends declared (dollars per share) |  |  |  | $ 0.5 us-gaap_CommonStockDividendsPerShareDeclared |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash compensation expense recognized as additional paid-in capital |  |  |  | 7,979,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 6,682,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 4,314,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  |  |  |  |  |  |  |  |  |  |
Series A Cumulative Redeemable Preferred Units of the Operating Partnership |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, decrease from redemptions or purchase of interests (in shares) | 80,000 hpp_NoncontrollingInterestDecreaseFromRedemptionsOrPurchaseOfInterestsAmount / us-gaap_StatementClassOfStockAxis = hpp_SeriesCumulativeRedeemablePreferredUnitsOfOperatingPartnershipMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares outstanding of preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 419,014 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = hpp_SeriesCumulativeRedeemablePreferredUnitsOfOperatingPartnershipMember | 407,066 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = hpp_SeriesCumulativeRedeemablePreferredUnitsOfOperatingPartnershipMember |
Interest rate of preferred stock |  |  |  | 6.25%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = hpp_SeriesCumulativeRedeemablePreferredUnitsOfOperatingPartnershipMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidation preference of preferred stock (dollars per share) | 25 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = hpp_SeriesCumulativeRedeemablePreferredUnitsOfOperatingPartnershipMember |  |  | $ 25.00 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = hpp_SeriesCumulativeRedeemablePreferredUnitsOfOperatingPartnershipMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred dividends declared (dollars per share) |  |  |  | $ 1.5625 us-gaap_PreferredStockDividendsPerShareDeclared / us-gaap_StatementClassOfStockAxis = hpp_SeriesCumulativeRedeemablePreferredUnitsOfOperatingPartnershipMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series B Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares outstanding of preferred stock |  |  |  | 5,800,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 5,800,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  | 5,800,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |  |  |
Interest rate of preferred stock |  |  |  | 8.375%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 8.375%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidation preference of preferred stock (dollars per share) |  |  |  | $ 25 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | $ 25 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  | $ 25 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |  |  |
Par value of preferred stock |  |  |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |  |  |
Liquidation preference of preferred stock, per annum (dollars per share) |  |  |  | $ 2.0938 hpp_PreferredStockLiquidationPreferencePerAnnumPerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, redemption period after change in control |  |  |  | 90 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred dividends declared (dollars per share) |  |  |  | $ 2.09375 us-gaap_PreferredStockDividendsPerShareDeclared / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock |  |  |  |  |  |  | 195,800,000 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 189,900,000 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 190,800,000 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share price |  |  |  | $ 22.07 us-gaap_SharesIssuedPricePerShare / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 22.27 us-gaap_SharesIssuedPricePerShare / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  | $ 22.27 us-gaap_SharesIssuedPricePerShare / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share price |  |  |  | $ 21.92 us-gaap_SharesIssuedPricePerShare / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 20.55 us-gaap_SharesIssuedPricePerShare / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  | $ 20.55 us-gaap_SharesIssuedPricePerShare / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |
At-the-Market |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of stock sold (in shares) |  |  |  | 76,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_PlanNameAxis = hpp_AttheMarketMember | 613,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_PlanNameAxis = hpp_AttheMarketMember |  |  |  |  |  |  |  |  |  |  |  |  |
Value of shares authorized |  |  |  |  |  |  |  |  |  | 125,000,000 hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorizedValue / us-gaap_PlanNameAxis = hpp_AttheMarketMember |  |  |  |  |  |  |  |
Existing and Newly Elected Board Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Award hold post vesting period |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change of Control | Series B Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate of preferred stock |  |  |  | 12.375%us-gaap_PreferredStockDividendRatePercentage / hpp_LiquidationPreferenceAxis = hpp_ChangeOfControlMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidation preference of preferred stock, per annum (dollars per share) |  |  |  | $ 3.09375 hpp_PreferredStockLiquidationPreferencePerAnnumPerShare / hpp_LiquidationPreferenceAxis = hpp_ChangeOfControlMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pinnacle JV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of buildings in property |  |  |  | 2 hpp_NumberOfBuildingsInProperty / us-gaap_BusinessAcquisitionAxis = hpp_PinnacleJvMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of real estate property |  |  |  | 625,640 us-gaap_AreaOfRealEstateProperty / us-gaap_BusinessAcquisitionAxis = hpp_PinnacleJvMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in property |  |  |  | 65.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = hpp_PinnacleJvMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pinnacle I |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in property |  |  |  | 98.25%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = hpp_PinnacleIMember | 98.25%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = hpp_PinnacleIMember |  |  |  |  | 98.25%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = hpp_PinnacleIMember |  |  |  |  |  |  |  |
Business acquisition, area of real estate property (in sqft) |  |  |  | 393,776 hpp_BusinessAcquisitionAreaOfRealEstateProperty / us-gaap_BusinessAcquisitionAxis = hpp_PinnacleIMember | 393,776 hpp_BusinessAcquisitionAreaOfRealEstateProperty / us-gaap_BusinessAcquisitionAxis = hpp_PinnacleIMember |  |  |  |  | 393,776 hpp_BusinessAcquisitionAreaOfRealEstateProperty / us-gaap_BusinessAcquisitionAxis = hpp_PinnacleIMember |  |  |  |  |  |  |  |
Pinnacle II |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, area of real estate property (in sqft) |  |  |  |  | 231,864 hpp_BusinessAcquisitionAreaOfRealEstateProperty / us-gaap_BusinessAcquisitionAxis = hpp_PinnacleIIMember |  |  |  |  | 231,864 hpp_BusinessAcquisitionAreaOfRealEstateProperty / us-gaap_BusinessAcquisitionAxis = hpp_PinnacleIIMember |  |  |  |  |  |  |  |
Public Offering | Series B Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of stock sold (in shares) |  |  |  |  |  |  |  |  |  |  | 2,300,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / hpp_SaleOfStockAxis = hpp_PublicOfferingMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 3,500,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / hpp_SaleOfStockAxis = hpp_PublicOfferingMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |
Proceeds from the offering before transaction costs |  |  |  |  |  |  |  |  |  |  | 57,500,000 hpp_ProceedsFromIssuanceOfRedeemablePreferredStockNetOfIssuanceCostsBeforeTransactionCosts1 / hpp_SaleOfStockAxis = hpp_PublicOfferingMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |  | 83,900,000 hpp_ProceedsFromIssuanceOfRedeemablePreferredStockNetOfIssuanceCostsBeforeTransactionCosts1 / hpp_SaleOfStockAxis = hpp_PublicOfferingMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
Public Offering | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of stock sold (in shares) |  |  |  |  |  |  | 8,250,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / hpp_SaleOfStockAxis = hpp_PublicOfferingMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 8,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / hpp_SaleOfStockAxis = hpp_PublicOfferingMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  | 13,225,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / hpp_SaleOfStockAxis = hpp_PublicOfferingMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |
Public offering price (dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 15.00 hpp_StockIssuedDuringPeriodPricePerShare / hpp_SaleOfStockAxis = hpp_PublicOfferingMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |
Exercise of Over-allotment Option | Series B Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of stock sold (in shares) |  |  |  |  |  |  |  |  |  |  | 300,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / hpp_SaleOfStockAxis = hpp_PublicOfferingExerciseOfOverAllotmentOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 300,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / hpp_SaleOfStockAxis = hpp_PublicOfferingExerciseOfOverAllotmentOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |
Exercise of Over-allotment Option | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of stock sold (in shares) |  |  |  |  |  |  | 1,237,500 us-gaap_StockIssuedDuringPeriodSharesNewIssues / hpp_SaleOfStockAxis = hpp_PublicOfferingExerciseOfOverAllotmentOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 1,200,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / hpp_SaleOfStockAxis = hpp_PublicOfferingExerciseOfOverAllotmentOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  | 1,725,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / hpp_SaleOfStockAxis = hpp_PublicOfferingExerciseOfOverAllotmentOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |
Public offering price (dollars per share) |  |  |  |  |  |  | $ 21.50 hpp_StockIssuedDuringPeriodPricePerShare / hpp_SaleOfStockAxis = hpp_PublicOfferingExerciseOfOverAllotmentOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 21.50 hpp_StockIssuedDuringPeriodPricePerShare / hpp_SaleOfStockAxis = hpp_PublicOfferingExerciseOfOverAllotmentOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Private Placement | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of stock sold (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / hpp_SaleOfStockAxis = us-gaap_PrivatePlacementMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |
General and Administrative Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  |  | 7,559,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember | 6,454,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Leasing Costs and Lease Intangibles, Net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  |  | 420,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = hpp_DeferredLeasingCostsAndLeaseIntatngiblesNetMember | 228,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = hpp_DeferredLeasingCostsAndLeaseIntatngiblesNetMember |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |
Additional Paid in Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash compensation expense recognized as additional paid-in capital |  |  |  | $ 7,979,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 6,682,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 4,314,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Business Acquisition, Area of Real Estate Property + References No definition available. + Details
Name: | hpp_BusinessAcquisitionAreaOfRealEstateProperty
Namespace Prefix: | hpp_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

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- Definition Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Amount + References No definition available. + Details
Name: | hpp_NoncontrollingInterestDecreaseFromRedemptionsOrPurchaseOfInterestsAmount
Namespace Prefix: | hpp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Noncontrolling Interest, Ownership by Noncontrolling Owners Amount + References No definition available. + Details
Name: | hpp_NoncontrollingInterestOwnershipByNoncontrollingOwnersAmount
Namespace Prefix: | hpp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of Buildings in Property + References No definition available. + Details
Name: | hpp_NumberOfBuildingsInProperty
Namespace Prefix: | hpp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of Common Unit Holders + References No definition available. + Details
Name: | hpp_NumberofCommonUnitHolders
Namespace Prefix: | hpp_
Data Type: | xbrli:integerItemType
Balance Type: | na
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