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FAIR VALUE - Additional Information (Details) - Loans Receivable [Member] - Property A [Member] | 12 Months Ended
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Dec. 31, 2020
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_
Data Type: | num:percentItemType
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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Balance Type: | na
Period Type: | duration

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

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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |