Debt instrument, maturity date in month and year.

No definition available.

Name:	pgre_DebtInstrumentMaturityDateInMonthAndYear
Namespace Prefix:	pgre_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Defeasance costs incurred with relation to repayment.

+ References

No definition available.

+ Details

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Namespace Prefix:	pgre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Payment of costs related to refinancing including prepayment penalties and swap breakage.

+ References

No definition available.

+ Details

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

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

+ Details

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

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Total amount of new mortgage loans on real estate during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29.6)
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04.(c) Schedule IV)
-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of mortgage loan on real estate that was renewed or extended.

+ References

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateRenewedAndExtendedAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_NotesAndLoansPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

Name:	us-gaap_ProceedsFromRepaymentsOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_RealEstatePropertiesAxis=pgre_ThreeOneWestFiftySecondStreetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=pgre_OfficeBuildingOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LoansPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=pgre_MortgagesAndNotesPayableWithFixedRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=pgre_OneThreeZeroOneAvenueOfAmericasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=pgre_TrancheAMember
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Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=pgre_TrancheBMember
Namespace Prefix:
Data Type:	na
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=pgre_NineZeroZeroThirdAvenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=pgre_WaterviewMember
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Debt - Additional Information (Details)				1 Months Ended	12 Months Ended
Debt - Additional Information (Details)	Oct. 07, 2016 USD ($) ft²	Oct. 06, 2016 USD ($) ft²	May 03, 2016 USD ($) ft²	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($) ft²	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Area of office properties \| ft²					10,800,000
Notes and mortgages payable, interest rate					4.10%
Notes and mortgages payable					$ 3,408,179,000	$ 2,941,524,000
Payment of swap breakage costs			$ 21,972,000
Repayment / defeasance of mortgage loan				$ 1,704,330,000	$ 689,269,000	927,633,000
31 West 52nd Street [Member]
Debt Instrument [Line Items]
Mortgage refinancing extended amount			$ 500,000,000
Debt instrument term of notes			10 years
Notes and mortgages payable, interest rate					3.80%
Proceeds after repayment of existing loan			$ 64,538,000
Notes and mortgages payable					$ 500,000,000	413,490,000
31 West 52nd Street [Member] \| Office Building One [Member]
Debt Instrument [Line Items]
Area of office properties \| ft²			786,647
31 West 52nd Street [Member] \| Existing Loan [Member]
Debt Instrument [Line Items]
Notes and mortgages payable					$ 413,490,000
31 West 52nd Street [Member] \| Mortgages and Notes Payable with Fixed Rate [Member]
Debt Instrument [Line Items]
Notes and mortgages payable, interest rate			3.80%		3.80%
Notes and mortgages payable					$ 500,000,000	237,600,000
Maturity date of debt					2026-05
1301 Avenue of Americas [Member]
Debt Instrument [Line Items]
Area of office properties \| ft²		1,800,000
Debt instrument term of notes		5 years
Notes and mortgages payable, interest rate		2.77%			2.79%
Proceeds after repayment of existing loan		$ 827,187,000
Notes and mortgages payable					$ 850,000,000
Mortgage financing amount		850,000,000
Maturity date of debt					2021-10
1301 Avenue of Americas [Member] \| Tranche A [Member]
Debt Instrument [Line Items]
Mortgage financing amount		500,000,000
1301 Avenue of Americas [Member] \| Tranche B [Member]
Debt Instrument [Line Items]
Mortgage financing amount		$ 350,000,000
1301 Avenue of Americas [Member] \| London Interbank Offered Rate (LIBOR) \| Tranche B [Member]
Debt Instrument [Line Items]
Notes and mortgages payable, interest rate		2.36%
Debt instrument basis spread on variable rate, description					$350,000,000 tranche at a floating rate of LIBOR plus 180 basis points (2.36% at closing).
Debt instrument basis spread on variable rate		1.80%
1301 Avenue of Americas [Member] \| Mortgages and Notes Payable with Fixed Rate [Member]
Debt Instrument [Line Items]
Notes and mortgages payable, interest rate					3.05%
Notes and mortgages payable					$ 500,000,000
Maturity date of debt					2021-11
1301 Avenue of Americas [Member] \| Mortgages and Notes Payable with Fixed Rate [Member] \| Tranche A [Member]
Debt Instrument [Line Items]
Notes and mortgages payable, interest rate		3.05%
900 Third Avenue [Member]
Debt Instrument [Line Items]
Notes and mortgages payable						274,337,000
Payment of swap breakage costs		$ 7,614,000
Repayment / defeasance of mortgage loan		$ 274,337,000
900 Third Avenue [Member] \| Office Building One [Member]
Debt Instrument [Line Items]
Area of office properties \| ft²		596,270
900 Third Avenue [Member] \| Mortgages and Notes Payable with Fixed Rate [Member]
Debt Instrument [Line Items]
Notes and mortgages payable						162,000,000
Waterview [Member]
Debt Instrument [Line Items]
Repayment / defeasance of mortgage loan	$ 210,000,000
Defeasance costs incurred with relation to repayment	$ 4,608,000
Waterview [Member] \| Office Building One [Member]
Debt Instrument [Line Items]
Area of office properties \| ft²	647,243
Waterview [Member] \| Mortgages and Notes Payable with Fixed Rate [Member]
Debt Instrument [Line Items]
Notes and mortgages payable						$ 210,000,000