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Notes Payable - Schedule of Long-term Debt Instruments (Details) (USD $) | 3 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Jun. 14, 2013 | Mar. 04, 2015 | Sep. 23, 2014 | Dec. 31, 2014 | Apr. 10, 2015 | Oct. 29, 2012 | Nov. 24, 2014 | Nov. 23, 2014 | Aug. 22, 2013 | Jan. 11, 2012 | Mar. 16, 2011 | Feb. 11, 2011 | Jul. 31, 2013
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount | $ 784,571,000 us-gaap_DebtInstrumentCarryingAmount |  |  |  |  |  | $ 915,003,000 us-gaap_DebtInstrumentCarryingAmount |  |  |  |  |  |  |  |  |  |  |
Unamortized loan premium, net | 2,619,000 us-gaap_DebtInstrumentUnamortizedPremium | [1] |  |  |  |  | 3,056,000 us-gaap_DebtInstrumentUnamortizedPremium | [1] |  |  |  |  |  |  |  |  |  |
Notes payable, carrying value | 787,190,000 us-gaap_NotesPayable |  |  |  |  |  | 918,059,000 us-gaap_NotesPayable |  |  |  |  |  |  |  |  |  |  |
Total | 787,190,000 us-gaap_LongTermDebt |  |  |  |  |  | 960,508,000 us-gaap_LongTermDebt |  |  |  |  |  |  |  |  |  |  |
Duration used in interest rate calculation | 360 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Notes Payable | 173,200,000 us-gaap_RepaymentsOfNotesPayable |  | 156,147,000 us-gaap_RepaymentsOfNotesPayable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
275 Brannan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount | 15,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_Location275BrannanMember | [2] |  |  |  |  | 15,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_Location275BrannanMember | [2] |  |  |  |  |  |  |  |  |  |
275 Brannan | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 2.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = hpp_Location275BrannanMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember | [3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pinnacle II |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount | 87,111,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_LocationPinnacleTwoMember | [4] |  |  |  |  | 87,421,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_LocationPinnacleTwoMember | [4] |  |  |  |  |  |  |  |  |  |
Interest Rate | 6.313%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = hpp_LocationPinnacleTwoMember | [3],[4] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest only term of loan |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic payment, debt service payment term |  |  |  | 30 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
901 Market |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount | 49,600,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_Location901MarketMember | [5] |  |  |  |  | 49,600,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_Location901MarketMember | [5] |  |  | 49,600,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_Location901MarketMember |  |  |  |  |  |  |
Unused borrowing capacity |  |  |  |  |  |  |  |  |  |  | 11,900,000 us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount / us-gaap_DebtInstrumentAxis = hpp_Location901MarketMember |  |  |  |  |  |  |
901 Market | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = hpp_Location901MarketMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember | [3],[5] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Element LA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount | 59,809,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_ElementLAPropertyMember | [6] |  |  |  |  | 59,490,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_ElementLAPropertyMember | [6] |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  |  |  |  | 102,400,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = hpp_ElementLAPropertyMember | 65,500,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = hpp_ElementLAPropertyMember |  |  |  |  |
Element LA | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.95%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = hpp_ElementLAPropertyMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember | [3],[6] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sunset Gower Sunset Bronson |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount | 97,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_SunsetGowerSunsetBronsonMember | [7] |  |  |  |  | 97,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_SunsetGowerSunsetBronsonMember | [7] |  |  |  |  |  | 97,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_SunsetGowerSunsetBronsonMember |  |  | 92,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_SunsetGowerSunsetBronsonMember |
Interest rate cap |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00%us-gaap_DerivativeCapInterestRate / us-gaap_DebtInstrumentAxis = hpp_SunsetGowerSunsetBronsonMember | 3.715%us-gaap_DerivativeCapInterestRate / us-gaap_DebtInstrumentAxis = hpp_SunsetGowerSunsetBronsonMember |  |
Notional amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 42,000,000 invest_DerivativeNotionalAmount / us-gaap_DebtInstrumentAxis = hpp_SunsetGowerSunsetBronsonMember | 50,000,000 invest_DerivativeNotionalAmount / us-gaap_DebtInstrumentAxis = hpp_SunsetGowerSunsetBronsonMember |  |
Increase in borrowing capacity |  |  |  |  | 160,000,000 hpp_DebtInstrumentIncreaseInBorrowingCapacity / us-gaap_DebtInstrumentAxis = hpp_SunsetGowerSunsetBronsonMember |  |  |  |  |  |  |  |  |  |  |  |  |
Sunset Gower Sunset Bronson | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = hpp_SunsetGowerSunsetBronsonMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember | [3],[8] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rincon Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount | 103,803,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_RinconCenterMember | [8] |  |  |  |  | 104,126,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_RinconCenterMember | [8] |  |  |  |  |  |  |  |  |  |
Interest Rate | 5.134%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = hpp_RinconCenterMember | [3],[8] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic payment, debt service payment term | 30 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First and King |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount |  |  |  |  |  | 95,000,000.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_FirstandKingMember |  |  |  |  |  |  |  |  |  |  |  |
First and King | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.60%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = hpp_FirstandKingMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember | [3],[9] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Met Park North |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount | 64,500,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_MetParkNorthMember | [9] |  |  |  |  | 64,500,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_MetParkNorthMember | [9] |  |  |  |  |  |  |  |  |  | 64,500,000.0 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_MetParkNorthMember
Basis spread on variable rate | 1.55%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = hpp_MetParkNorthMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate | 2.1644%us-gaap_DerivativeFixedInterestRate / us-gaap_DebtInstrumentAxis = hpp_MetParkNorthMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Met Park North | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.55%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = hpp_MetParkNorthMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember | [10],[3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
10950 Washington |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount | 28,748,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_Location10950WashingtonMember | [10] |  |  |  |  | 28,866,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_Location10950WashingtonMember | [10] |  |  |  |  |  |  |  |  |  |
Interest Rate | 5.316%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = hpp_Location10950WashingtonMember | [10],[3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic payment, debt service payment term | 30 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pinnacle I |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount | 129,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_LocationPinnacleOneMember | [11] |  |  |  |  | 129,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = hpp_LocationPinnacleOneMember | [11] |  |  |  |  |  |  |  |  |  |
Interest Rate | 3.954%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = hpp_LocationPinnacleOneMember | [11],[3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest only term of loan | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic payment, debt service payment term | 30 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual debt service | 7,349 us-gaap_DebtInstrumentAnnualPrincipalPayment / us-gaap_DebtInstrumentAxis = hpp_LocationPinnacleOneMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First Financial |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate | 4.58%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = hpp_FirstFinancialMember | [12],[3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving Credit Facility 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term line of credit | 0 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  |  |  |  |  | 130,000,000 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving Credit Facility 2014 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, commitment fee percentage |  |  |  |  |  | 0.20%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, potential commitment fee percentage, post credit rating |  |  |  |  |  | 0.125%hpp_LineOfCreditFacilityPotentialCommitmentFeePercentagePostCreditRating / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving Credit Facility 2014 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, commitment fee percentage |  |  |  |  |  | 0.35%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, potential commitment fee percentage, post credit rating |  |  |  |  |  | 0.30%hpp_LineOfCreditFacilityPotentialCommitmentFeePercentagePostCreditRating / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving Credit Facility 2014 | LIBOR | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  | 1.15%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, potential basis spread on LIBOR plus 87.5 to 165 basis points, post credit rating |  |  |  |  |  | 0.875%hpp_DebtInstrumentPotentialBasisSpreadOnVariableRatePostCreditRating / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving Credit Facility 2014 | LIBOR | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  | 1.55%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, potential basis spread on LIBOR plus 87.5 to 165 basis points, post credit rating |  |  |  |  |  | 1.65%hpp_DebtInstrumentPotentialBasisSpreadOnVariableRatePostCreditRating / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving Credit Facility 2014 | Base Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  | 0.15%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, potential basis spread on LIBOR plus 87.5 to 165 basis points, post credit rating |  |  |  |  |  | 0.00%hpp_DebtInstrumentPotentialBasisSpreadOnVariableRatePostCreditRating / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving Credit Facility 2014 | Base Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  | 0.55%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, potential basis spread on LIBOR plus 87.5 to 165 basis points, post credit rating |  |  |  |  |  | 0.65%hpp_DebtInstrumentPotentialBasisSpreadOnVariableRatePostCreditRating / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving Credit Facility 2012 | LIBOR | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.55%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2012Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember | [3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving Credit Facility 2012 | LIBOR | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 2.20%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = hpp_RevolvingCreditFacility2012Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember | [3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument carrying amount | 150,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |  |  |  |  |  | 150,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  | 150,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |  |  |  |  |  |  |  |  |  |  |  |
Term Loan | LIBOR | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Term Loan | LIBOR | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Term Loan | Base Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Line of credit facility, potential basis spread on LIBOR plus 87.5 to 165 basis points, post credit rating |  |  |  |  |  | 0.00%hpp_DebtInstrumentPotentialBasisSpreadOnVariableRatePostCreditRating / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |  |  |  |  |  |  |  |  |  |  |  |
Term Loan | Base Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Disposal Group, Not Discontinued Operations | First Financial |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Subsequent Event | 901 Market |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Repayments of Notes Payable |  |  |  |  |  |  |  |  | $ 19,600,000 us-gaap_RepaymentsOfNotesPayable / us-gaap_DebtInstrumentAxis = hpp_Location901MarketMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |  |  |  |  |  |
[1] | Represents unamortized amount of the non-cash mark-to-market adjustment on debt associated with Pinnacle II.
[2] | Subsequent to March 31, 2015 the loan was fully repaid.
[3] | Interest rate with respect to indebtedness is calculated on the basis of a 360-day year for the actual days elapsed, excluding the amortization of loan fees and costs.
[4] | This loan was assumed on June 14, 2013 in connection with the contribution of the Pinnacle II building to the Company’s joint venture with M. David Paul & Associates/Worthe Real Estate Group. This loan bore interest only for the first five years. Beginning with the payment due October 6, 2011, monthly debt service includes annual debt amortization payments based on a 30-year amortization schedule.
[5] | On October 29, 2012, we obtained a loan for our 901 Market property pursuant to which we borrowed $49.6 million upon closing, with the ability to draw up to an additional $11.9 million for budgeted base building, tenant improvements, and other costs associated with the renovation and lease-up of that property.
[6] | On November 24, 2014 we amended our construction loan for Element LA to, among other things, increase availability from $65.5 million to $102.4 million for budgeted site-work, construction of a parking garage, base building, tenant improvement, and leasing commission costs associated with the renovation and lease-up of the property.
[7] | On March 16, 2011, we purchased an interest rate cap in order to cap one-month LIBOR at 3.715% with respect to $50.0 million of the loan through February 11, 2016. On January 11, 2012 we purchased an interest rate cap in order to cap one-month LIBOR at 2.00% with respect to $42.0 million of the loan through February 11, 2016. Effective March 4, 2015, the terms of this loan were amended and restated to introduce the ability to draw up to an additional $160.0 million for budgeted construction costs associated with our ICON development and to extend the maturity date from February 11, 2018 to March 4, 2019.
[8] | This loan is amortizing based on 30-year amortization schedule.
[9] | This loan bears interest only at a rate equal to one-month LIBOR plus 1.55%. The full loan amount is subject to an interest rate contract that swapped one-month LIBOR to a fixed rate of 2.1644% through the loan’s maturity on August 1, 2020.
[10] | This loan is amortizing based on a 30-year amortization schedule.
[11] | This loan bears interest only for the first five years. Beginning with the payment due December 6, 2017, monthly debt service will include annual debt amortization payments based on a 30-year amortization schedule, for total annual debt service of $7,349.
[12] | This note has been recorded as part of the liabilities associated with real estate held for sale (see note 3).

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