Intangible Assets and Intangible Liabilities - Schedule of Estimated Annual Amortization of Acquired Below-Market Leases, Net of Acquired Above-Market Leases and In Place Leases (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Finite Lived Intangible Assets [Line Items]
2021	$ (3,567)
2022	(1,629)
2023	(5,056)
2024	(5,994)
2025	(4,633)
Leases, Acquired-in-Place [Member]
Finite Lived Intangible Assets [Line Items]
2021	26,375
2022	21,878
2023	17,811
2024	14,342
2025	$ 10,435

Intangible Assets and Intangible Liabilities - Schedule of Estimated Annual Amortization of Acquired Below-Market Leases, Net of Acquired Above-Market Leases and In Place Leases (Details)
$ in Thousands

Dec. 31, 2020

USD ($)

Finite Lived Intangible Assets [Line Items]

$ (3,567)

(1,629)

(5,056)

(5,994)

(4,633)

Leases, Acquired-in-Place [Member]

Finite Lived Intangible Assets [Line Items]

26,375

21,878

17,811

14,342

$ 10,435

Amount of non-cash amortization of intangible asset (liability) for above and below market leases expected to be recognized during the next fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	pgre_AmortizationOfAboveAndBelowMarketLeasesNextTwelveMonths
Namespace Prefix:	pgre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of non-cash amortization of intangible asset (liability) for above and below market leases expected to be recognized during the fifth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	pgre_AmortizationOfAboveAndBelowMarketLeasesYearFive
Namespace Prefix:	pgre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of non-cash amortization of intangible asset (liability) for above and below market leases expected to be recognized during the fourth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	pgre_AmortizationOfAboveAndBelowMarketLeasesYearFour
Namespace Prefix:	pgre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of non-cash amortization of intangible asset (liability) for above and below market leases expected to be recognized during the third fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	pgre_AmortizationOfAboveAndBelowMarketLeasesYearThree
Namespace Prefix:	pgre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of non-cash amortization of intangible asset (liability) for above and below market leases expected to be recognized during the second fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	pgre_AmortizationOfAboveAndBelowMarketLeasesYearTwo
Namespace Prefix:	pgre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LeasesAcquiredInPlaceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: