XML 103 R87.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Real Estate Impairment Loss - Additional Information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Real Estate [Abstract] |  |
Real estate non-cash impairment loss | $ 42,000,000 | $ 46,000,000

X
- Definition Real estate non-cash impairment loss. + References No definition available. + Details
Name: | pgre_RealEstateNonCashImpairmentLoss
Namespace Prefix: | pgre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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