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Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) (Designated as Hedging Instrument, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Derivatives, Fair Value    
Asset Derivatives $ 3us-gaap_DerivativeFairValueOfDerivativeAsset $ 192us-gaap_DerivativeFairValueOfDerivativeAsset
Liability Derivatives 1,750us-gaap_DerivativeFairValueOfDerivativeLiability 0us-gaap_DerivativeFairValueOfDerivativeLiability
Interest Rate Contract | Interest Rate Contracts
    
Derivatives, Fair Value    
Asset Derivatives 3us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= hpp_InterestRateContractsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 192us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= hpp_InterestRateContractsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Liability Derivatives $ 1,750us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_BalanceSheetLocationAxis
= hpp_InterestRateContractsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 $ 0us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_BalanceSheetLocationAxis
= hpp_InterestRateContractsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember