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LOANS - (Schedule of Loans Modifications as Subsequent Default, By Payment Status (Details) - Not Past Due [Member] $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($)
Loans modified | $ 3,254
Consumer Loan [Member] | Commercial and Industrial [Member] |
Loans modified | $ 3,254

X
- Definition Financing receivable excluding accrued interest modified in period amount. + References No definition available. + Details
Name: | pgc_FinancingReceivableExcludingAccruedInterestModifiedInPeriodAmount
Namespace Prefix: | pgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CommercialAndIndustrialSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |