Related Party Transactions (Details) (FJM Investments, LLC [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014 sqft
FJM Investments, LLC [Member]
Related Party Transaction [Line Items]
Area of real estate property	3,708
Lease term	1 year
Annual rental obligation under the lease	$ 148

Related Party Transaction, Annual Rent Obligation from Subtenant

No definition available.

Name:	hpp_RelatedPartyTransactionAnnualRentObligationFromSubtenant
Namespace Prefix:	hpp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration