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Schedule III - Real Estate and Accumulated Depreciation (Parenthetical) (Details) $ in Billions | Dec. 31, 2019 USD ($)
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Real Estate And Accumulated Depreciation Disclosure [Abstract] |
Assets and liabilities for tax purposes | $ 2.5

X
- Definition This amount represents the difference between the tax basis and the GAAP basis in the net carrying value of real estate. + References No definition available. + Details
Name: | pgre_NetBasisDifferenceOfAssetsAndLiabilitiesBetweenTaxBasisAndGaapBasis
Namespace Prefix: | pgre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | srt_RealEstateAndAccumulatedDepreciationDisclosureAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration