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Related Party Transactions - Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Related Party Transaction
Related Party Transaction, Monthly Rent Obligation from Subtenant	$ 0.012hpp_RelatedPartyTransactionMonthlyRentObligationfromSubtenant
FJM Investments, LLC
Related Party Transaction
Area of real estate property	3,707us-gaap_AreaOfRealEstateProperty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = hpp_FjmInvestmentsLlcMember

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- Definition

Related Party Transaction, Monthly Rent Obligation from Subtenant

+ References

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+ Details

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- Definition

Area of a real estate property.

+ References

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+ Details

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Balance Type:	na
Period Type:	instant

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- Details

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- Details

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