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Interest and Other Income, net - Schedule of Interest and Other Income, net (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Interest And Other Income [Abstract] |  |
Interest income, net | $ 231 | $ 390
Mark-to-market of investments in our deferred compensation plans |  | 912
Total interest and other income, net | $ 231 | $ 1,302

X
- Definition This element represents interest and other investment loss income net of tax including interest income, mark-to-market investments in deferred compensation, and income (loss) generated from investee accounted for on the cost method. + References No definition available. + Details
Name: | pgre_InterestAndOtherIncomeLossNet
Namespace Prefix: | pgre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of interest income and dividend income including unrealized gains and losses on investments, net of any investment expenses on the investments held under the deferred compensation plan on behalf of the employees. + References No definition available. + Details
Name: | pgre_InvestmentIncomeLossOnInvestmentsInDeferredCompensationPlan
Namespace Prefix: | pgre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business). + References No definition available. + Details
Name: | us-gaap_InterestAndOtherIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InterestAndOtherIncomeAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration