Prepaid Expenses and Other Assets, net - Narrative (Details) - USD ($)	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Unrealized gain on non-real estate investments	$ 900,000	$ 2,600,000
Gain (loss) recognized on stock purchase warrant	$ 20,800	$ 900,000

Non-Real Estate Investments, Unrealized Gain (Loss) On Change In Fair Value

No definition available.

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