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Equity - Outperformance Program (Details) (USD $) | 0 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 0 Months Ended |  |
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Jan. 02, 2014 | Mar. 31, 2015 | Dec. 31, 2014 | Mar. 31, 2014 | Jan. 02, 2012 | Jan. 02, 2013 | Jan. 02, 2015 | Dec. 31, 2012 | Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Performance period | 3 years |  | 3 years |  |  |  |  |  |
Amortization of stock-based compensation |  | $ 2,251,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | $ 7,979,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  |  |  |  |
General and Administrative Expense |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Allocated Share-based Compensation Expense |  | 2,100,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember |  | 1,300,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember |  |  |  |  |
Deferred Leasing Costs and Lease Intatngibles, Net |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Allocated Share-based Compensation Expense |  | 200,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = hpp_DeferredLeasingCostsAndLeaseIntatngiblesNetMember |  | 100,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = hpp_DeferredLeasingCostsAndLeaseIntatngiblesNetMember |  |  |  |  |
Additional Paid in Capital |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Amortization of stock-based compensation |  | 2,251,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 7,979,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 1,400,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Award vesting period | 2 years |  |  |  |  |  |  |  |
2012 Outperformance Program |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Maximum share value authorized under plan |  |  |  |  |  |  |  | 10,000,000 hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumShareValueAuthorizedUnderPlan / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |
Share-based Compensation Arrangement by Share-based Payment Award, Participation Interests Remaining, Percent |  | 75.00%hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardParticipationInterestsRemainingPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |  |  |  |  |  |  |
Performance period |  | 3 years |  |  |  |  |  |  |
Percentage Amount TSR Exceeds Simple Annual TSR |  | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountTotalShareholderReturnExceedsSimpleAnnualTotalShareholderReturnPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |  |  |  |  |  |  |
Simple Annual TSR |  | 9.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardSimpleAnnualTotalShareholderReturnPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |  |  |  |  |  |  |
Percent TSR Exceeds SNL Equity REIT Index |  | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountTotalShareholderReturnExceedsSnlEquityReitIndexPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |  |  |  |  |  |  |
Percent of Underperformance of SNL Equity REIT Index |  | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountOfUnderperformanceOfSnlEquityReitIndexPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |  |  |  |  |  |  |
Underperformance of SNL Equity REIT Index per Year |  | 3.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardUnderperformanceOfSnlEquityReitIndexPerYearPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |  |  |  |  |  |  |
Award vesting period |  | 2 years |  |  |  |  |  |  |
Stock settled awards |  |  |  |  | 2,620,000 us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |  |  |  |
Forfeiture adjustment as percent of total cost |  |  |  |  | 6.00%hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardForfeitureAdjustmentasPercentofTotalCost / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |  |  |  |
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent |  |  |  |  |  |  |  | 3,490,000 us-gaap_DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |
Risk free interest rate |  |  |  |  | 0.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |  |  |  |
Expected dividend payment per share |  |  |  |  | $ 1.62 hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardFairValueAssumptionsExpectedDividendPaymentPerShare / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |  |  |  |
2012 Outperformance Program | The Company |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Expected volatility rate |  |  |  |  | 36.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member / hpp_ValuationMethodAxis = hpp_TheCompanyMember |  |  |  |
2012 Outperformance Program | SNL Equity REIT Index |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Expected volatility rate |  |  |  |  | 35.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member / hpp_ValuationMethodAxis = hpp_SNLEquityREITIndexMember |  |  |  |
2012 Outperformance Program | Maximum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Absolute TSR Reduced on a Linear Basis |  | 100.00%hpp_AbsoluteTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |
Simple TSR Reduced on a Linear Basis |  | 7.00%hpp_SimpleTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |
2012 Outperformance Program | Minimum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Absolute TSR Reduced on a Linear Basis |  | 0.00%hpp_AbsoluteTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |
Simple TSR Reduced on a Linear Basis |  | 0.00%hpp_SimpleTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |
2012 Outperformance Program | Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Shares granted under OPP |  | 125,475 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member |  |  |  |  |  |  |
2013 Outperformance Program |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Maximum share value authorized under plan |  |  |  |  |  | 11,000,000.0 hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumShareValueAuthorizedUnderPlan / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember |  |  | 11,000,000.0 hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumShareValueAuthorizedUnderPlan / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember
Performance period |  | 3 years |  |  |  |  |  |  |
Percentage Amount TSR Exceeds Simple Annual TSR |  | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountTotalShareholderReturnExceedsSimpleAnnualTotalShareholderReturnPercent / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember |  |  |  |  |  |  |
Simple Annual TSR |  | 9.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardSimpleAnnualTotalShareholderReturnPercent / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember |  |  |  |  |  |  |
Percent TSR Exceeds SNL Equity REIT Index |  | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountTotalShareholderReturnExceedsSnlEquityReitIndexPercent / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember |  |  |  |  |  |  |
Percent of Underperformance of SNL Equity REIT Index |  | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountOfUnderperformanceOfSnlEquityReitIndexPercent / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember |  |  |  |  |  |  |
Underperformance of SNL Equity REIT Index per Year |  | 3.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardUnderperformanceOfSnlEquityReitIndexPerYearPercent / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember |  |  |  |  |  |  |
Award vesting period |  | 2 years |  |  |  |  |  |  |
Stock settled awards |  |  |  |  |  | 3,520,000 us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember |  |  |
Forfeiture adjustment as percent of total cost |  |  |  |  |  | 6.00%hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardForfeitureAdjustmentasPercentofTotalCost / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember |  |  |
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent |  |  |  |  |  |  |  |  | 4,140,000 us-gaap_DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember
Risk free interest rate |  |  |  |  |  | 0.38%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember |  |  |
Expected dividend payment per share |  |  |  |  |  | $ 1.50 hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardFairValueAssumptionsExpectedDividendPaymentPerShare / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember |  |  |
2013 Outperformance Program | The Company |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Expected volatility rate |  |  |  |  |  | 33.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember / hpp_ValuationMethodAxis = hpp_TheCompanyMember |  |  |
2013 Outperformance Program | SNL Equity REIT Index |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Expected volatility rate |  |  |  |  |  | 25.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember / hpp_ValuationMethodAxis = hpp_SNLEquityREITIndexMember |  |  |
2013 Outperformance Program | Maximum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Absolute TSR Reduced on a Linear Basis |  | 100.00%hpp_AbsoluteTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |
Simple TSR Reduced on a Linear Basis |  | 7.00%hpp_SimpleTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |
Hypothetical bonus pool for stock settled award |  |  |  |  |  | 4,000,000 hpp_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmountHypotheticalBonus / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |
2013 Outperformance Program | Minimum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Absolute TSR Reduced on a Linear Basis |  | 0.00%hpp_AbsoluteTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |
Simple TSR Reduced on a Linear Basis |  | 0.00%hpp_SimpleTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |
Hypothetical bonus pool for stock settled award |  |  |  |  |  | 2,000,000 hpp_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmountHypotheticalBonus / us-gaap_PlanNameAxis = hpp_TwoThousandThirteenOutperformanceProgramMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |
2014 Outperformance Program |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Maximum share value authorized under plan |  |  | 12,000,000 hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumShareValueAuthorizedUnderPlan / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Performance Based Award, Total |  | 2,400,000 hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardPerformanceBasedAwardTotal / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Performance Measurement, Total Shareholder Return, Percent |  | 10.50%hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardPerformanceMeasurementTotalShareholderReturnPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |  |
Percentage Amount TSR Exceeds Simple Annual TSR | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountTotalShareholderReturnExceedsSimpleAnnualTotalShareholderReturnPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |  |  |
Simple Annual TSR | 9.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardSimpleAnnualTotalShareholderReturnPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |  |  |
Percent TSR Exceeds SNL Equity REIT Index | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountTotalShareholderReturnExceedsSnlEquityReitIndexPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |  |  |
Percent of Underperformance of SNL Equity REIT Index | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountOfUnderperformanceOfSnlEquityReitIndexPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |  |  |
Underperformance of SNL Equity REIT Index per Year | 3.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardUnderperformanceOfSnlEquityReitIndexPerYearPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |  |  |
Stock settled awards | 3,210,000 us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |  |  |
Forfeiture adjustment as percent of total cost | 10.00%hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardForfeitureAdjustmentasPercentofTotalCost / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |  |  |
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent |  |  | 3,210,000 us-gaap_DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |
Risk free interest rate | 0.77%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |  |  |
Expected dividend payment per share | 1.50 hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardFairValueAssumptionsExpectedDividendPaymentPerShare / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member |  |  |  |  |  |  |  |
2014 Outperformance Program | The Company |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Expected volatility rate | 28.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member / hpp_ValuationMethodAxis = hpp_TheCompanyMember |  |  |  |  |  |  |  |
2014 Outperformance Program | SNL Equity REIT Index |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Expected volatility rate | 26.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member / hpp_ValuationMethodAxis = hpp_SNLEquityREITIndexMember |  |  |  |  |  |  |  |
2014 Outperformance Program | Maximum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Absolute TSR Reduced on a Linear Basis | 100.00%hpp_AbsoluteTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |
Simple TSR Reduced on a Linear Basis | 7.00%hpp_SimpleTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |
2014 Outperformance Program | Minimum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Absolute TSR Reduced on a Linear Basis | 0.00%hpp_AbsoluteTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |
Simple TSR Reduced on a Linear Basis | 0.00%hpp_SimpleTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2014Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |
2015 Outperformance Program |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Maximum share value authorized under plan |  | 15,000,000 hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumShareValueAuthorizedUnderPlan / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |  |  |  |  |  |
Performance period |  | 3 years |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Performance Based Award, Total |  | 3,800,000 hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardPerformanceBasedAwardTotal / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Performance Measurement, Total Shareholder Return, Percent |  | 10.50%hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardPerformanceMeasurementTotalShareholderReturnPercent / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |  |  |  |  |  |
Percentage Amount TSR Exceeds Simple Annual TSR |  | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountTotalShareholderReturnExceedsSimpleAnnualTotalShareholderReturnPercent / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |  |  |  |  |  |
Simple Annual TSR |  | 9.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardSimpleAnnualTotalShareholderReturnPercent / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |  |  |  |  |  |
Percent TSR Exceeds SNL Equity REIT Index |  | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountTotalShareholderReturnExceedsSnlEquityReitIndexPercent / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |  |  |  |  |  |
Percent of Underperformance of SNL Equity REIT Index |  | 4.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAmountOfUnderperformanceOfSnlEquityReitIndexPercent / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |  |  |  |  |  |
Underperformance of SNL Equity REIT Index per Year |  | 3.00%hpp_ShareBasedCompensationArrangementByShareBasedPaymentAwardUnderperformanceOfSnlEquityReitIndexPerYearPercent / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |  |  |  |  |  |
Award vesting period |  | 2 years |  |  |  |  |  |  |
Stock settled awards | 3,980,000 us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |  |  |  |  |  |  |
Forfeiture adjustment as percent of total cost |  |  |  |  |  |  | 6.00%hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardForfeitureAdjustmentasPercentofTotalCost / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent |  | $ 4,270,000 us-gaap_DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |  |  |  |  |  |
Risk free interest rate |  |  |  |  |  |  | 1.13%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |
Expected dividend payment per share |  |  |  |  |  |  | $ 1.50 hpp_SharebasedCompensationArrangementbySharebasedPaymentAwardFairValueAssumptionsExpectedDividendPaymentPerShare / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember |  |
2015 Outperformance Program | The Company |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Expected volatility rate |  |  |  |  |  |  | 22.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember / hpp_ValuationMethodAxis = hpp_TheCompanyMember |  |
2015 Outperformance Program | SNL Equity REIT Index |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Expected volatility rate |  |  |  |  |  |  | 22.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember / hpp_ValuationMethodAxis = hpp_SNLEquityREITIndexMember |  |
2015 Outperformance Program | Maximum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Absolute TSR Reduced on a Linear Basis |  | 100.00%hpp_AbsoluteTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |
Simple TSR Reduced on a Linear Basis |  | 7.00%hpp_SimpleTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |
2015 Outperformance Program | Minimum |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Absolute TSR Reduced on a Linear Basis |  | 0.00%hpp_AbsoluteTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |
Simple TSR Reduced on a Linear Basis |  | 0.00%hpp_SimpleTotalShareholderReturnReducedOnLinearBasisPercent / us-gaap_PlanNameAxis = hpp_A2015OutperformanceProgramMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |
Common Units | 2012 Outperformance Program |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |
Shares granted under OPP |  | 125,477 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted / us-gaap_PlanNameAxis = hpp_OutperformanceProgram2012Member / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Amount of Underperformance of SNL Equity REIT Index, Percent + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Amount Total Shareholder Return Exceeds Simple Annual Total Shareholder Return, Percent + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Amount Total Shareholder Return Exceeds SNL Equity REIT Index, Percent + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Payment Per Share + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Underperformance of SNL Equity REIT Index per Year, Percent + References No definition available. + Details
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- Definition This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415241&loc=d3e4534-113899 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11149-113907 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11178-113907 + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements. + References No definition available. + Details
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- Definition Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Net number of non-option equity instruments granted to participants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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