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Basis of Presentation and Significant Accounting Policies - Summary of Characterization of Dividend Distributions for Federal Income Tax Purposes (Parenthetical) (Details) - $ / shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022
Income Taxes [Line Items] |  |  |  |
Cash dividend | $ 0.035 | $ 0.0775 |  |
Split year dividend per share |  |  | $ 0.007075 | $ 0.070425

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- Definition Aggregate dividend paid per share that is attributable to the current period for federal income tax purposes. + References No definition available. + Details
Name: | pgre_DividendPerShareAttributableToCurrentPeriod
Namespace Prefix: | pgre_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Income taxes . + References No definition available. + Details
Name: | pgre_IncomeTaxesLineItems
Namespace Prefix: | pgre_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Aggregate split year cash dividend paid per share that is attributable to the current period for federal income tax purposes. + References No definition available. + Details
Name: | pgre_SplitYearDividendPerShareAttributableToCurrentPeriod
Namespace Prefix: | pgre_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration