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FAIR VALUE - Additional Information (Details) | 9 Months Ended
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Sep. 30, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Fair value transfers between level 1 and level 2 | $ 0
Loans Receivable [Member] | Property A [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Discount rate | 15.00%
Age of appraisal | 12 months

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- Definition Fair value inputs, discount rate. + References No definition available. + Details
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Namespace Prefix: | pgc_
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Balance Type: | na
Period Type: | duration

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- Definition Fair Value Inputs, Age Of Appraisal. + References No definition available. + Details
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- 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_
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- Definition Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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Balance Type: | credit
Period Type: | instant

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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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Balance Type: |
Period Type: |