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v3.25.1

DEPOSITS (Details of Total Deposits) (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
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Deposits: |  |
Interest-bearing checking, reciprocal balances | $ 1,750.0 | $ 1,570.0
Money market, reciprocal balances | $ 101.7 | $ 85.3

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- Definition Deposits + References No definition available. + Details
Name: | pgc_DepositsDetailsAbstract
Namespace Prefix: | pgc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Interest Bearing Deposit, Reciprocal Program. + References No definition available. + Details
Name: | pgc_InterestBearingForeignDepositReciprocalProgram
Namespace Prefix: | pgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Money market deposit, reciprocal program + References No definition available. + Details
Name: | pgc_MoneyMarketForeignDepositReciprocalProgram
Namespace Prefix: | pgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant