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Variable Interest Entities ("VIEs") - Summary of Investments in Unconsolidated Real Estate Funds and Maximum Risk of Loss from Investments (Details) - Unconsolidated Real Estate Funds [Member] - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Carrying Value of Investments [Member] |  |
Variable Interest Entity [Line Items] |  |
Investments in unconsolidated real estate funds | $ 12,867 | $ 10,317
Asset Management Fees and Other Receivables [Member] |  |
Variable Interest Entity [Line Items] |  |
Investments in unconsolidated real estate funds | 842 | 37,563
Maximum Risk of Loss [Member] |  |
Variable Interest Entity [Line Items] |  |
Investments in unconsolidated real estate funds | $ 13,709 | $ 47,880

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- Definition Variable interest entity unconsolidated carrying amount assets and liabilities net. + References No definition available. + Details
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Namespace Prefix: | pgre_
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Balance Type: | debit
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- Definition The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5747-111685 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5728-111685 + Details
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Balance Type: | credit
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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- Details
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- Details
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