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Leases - Schedule of Rental Revenues (Parenthetical) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020
Disaggregation Of Revenue [Abstract] |  |
Non-cash write-offs, primarily for straight-line rent receivables | $ 11,309,000 | $ 11,309,000
Uncollectible accounts receivable | $ 2,051,000 | $ 2,051,000

X
- Definition Accounts receivable reserve expense. + References No definition available. + Details
Name: | pgre_AccountsReceivableReserveExpense
Namespace Prefix: | pgre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Writeoff of straight line rent receivable. + References No definition available. + Details
Name: | pgre_WriteoffOfStraightLineRentReceivable
Namespace Prefix: | pgre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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