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Related Party Transactions - Narrative (Details) (FJM Investments, LLC, USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014 sqft
FJM Investments, LLC
Related Party Transaction
Area of real estate property	3,708
Lease term	1 year
Annual rental obligation under the lease	$ 148

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- Definition

Related Party, Lease Term

+ References

No definition available.

+ Details

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Namespace Prefix:	hpp_
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Balance Type:	na
Period Type:	duration

X

- Definition

Related Party Transaction, Annual Rent Obligation from Subtenant

+ References

No definition available.

+ Details

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Namespace Prefix:	hpp_
Data Type:	xbrli:monetaryItemType
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- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

X

- Details

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