Name:	pgre_IncomeLossFromUnconsolidatedRealEstateFund
Namespace Prefix:	pgre_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Ownership percentage in investment funds.

No definition available.

Name:	pgre_OwnershipPercentageInInvestmentFunds
Namespace Prefix:	pgre_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Ownership percentage in investment funds increased.

No definition available.

Name:	pgre_OwnershipPercentageInInvestmentFundsIncreased
Namespace Prefix:	pgre_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

The carrying amount of investments in unconsolidated real estate and other joint ventures not separately presented. This includes direct and indirect investments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

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

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 976
-SubTopic 310
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477332/976-310-50-1