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Interest and Other Income, net - Schedule of Interest and Other Income, Net (Parenthetical) (Details) | Mar. 01, 2019
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PGRESS Equity Holdings L.P. [Member] |
Schedule Of Investment Income Reported Amounts By Category [Line Items] |
Preferred equity redeemed percentage | 100.00%

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- Definition Preferred equity redeemed percentage. + References No definition available. + Details
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Namespace Prefix: | pgre_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=pgre_PGRESSFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |