Consolidation, less than wholly owned subsidiary, parent ownership percentage.

No definition available.

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Namespace Prefix:	pgre_
Data Type:	num:percentItemType
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Period Type:	instant

- Definition

Consolidation, less than wholly owned subsidiary, third party ownership percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	pgre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Economic interest percentage.

+ References

No definition available.

+ Details

Name:	pgre_EconomicInterestPercentage
Namespace Prefix:	pgre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Economic interest percentage including indirect interest.

+ References

No definition available.

+ Details

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Namespace Prefix:	pgre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Indirect interest percentage.

+ References

No definition available.

+ Details

Name:	pgre_IndirectInterestPercentage
Namespace Prefix:	pgre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Ownership interest in real estate funds.

+ References

No definition available.

+ Details

Name:	pgre_OwnershipInterestInRealEstateFunds
Namespace Prefix:	pgre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of interest acquired.

+ References

No definition available.

+ Details

Name:	pgre_PercentageOfInterestAcquired
Namespace Prefix:	pgre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of interest transferred to new joint venture.

+ References

No definition available.

+ Details

Name:	pgre_PercentageOfInterestTransferredToNewJointVenture
Namespace Prefix:	pgre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Third party economic interest.

+ References

No definition available.

+ Details

Name:	pgre_ThirdPartyEconomicInterest
Namespace Prefix:	pgre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Third party ownership interest in real estate funds.

+ References

No definition available.

+ Details

Name:	pgre_ThirdPartyOwnershipInterestInRealEstateFunds
Namespace Prefix:	pgre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_InvestmentTypeAxis=pgre_ResidentialDevelopmentFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=pgre_OneSteuartLaneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OwnershipAxis=pgre_NewJointVentureMember
Namespace Prefix:
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Investments in Unconsolidated Joint Ventures - Additional Information (Details)		6 Months Ended
	Mar. 14, 2018	Jun. 30, 2018	Mar. 13, 2018
RDF [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership percentage in residential fund		7.40%
Percentage of interest third party ownership		92.60%
One Steuart Lane [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage		25.00%
Property funds, ownership percentage		1.85%
One Steuart Lane [Member] \| RDF [Member]
Schedule Of Equity Method Investments [Line Items]
Percentage of interest acquired	10.00%
Indirect interest percentage	15.00%
Property funds, ownership percentage	25.00%
New Joint Venture [Member] \| RDF [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage			20.00%
Percentage of interest owned	75.00%	75.00%
Percentage of interest owned by third party		25.00%
New Joint Venture [Member] \| One Steuart Lane [Member] \| RDF [Member]
Schedule Of Equity Method Investments [Line Items]
Percentage of interest transferred to new joint venture	20.00%
Property funds, ownership percentage		20.00%
Property funds, ownership percentage		5.00%