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BENEFIT PLANS - Additional Information (Details) - 401(K) Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Contributions to the plan	$ 2.4	$ 3.5	$ 3.7
Defined Contribution Plan partially match Employee Contribution Percent	3.00%

X

- Definition

Defined contribution plan partially match employee contribution percent.

+ References

No definition available.

+ Details

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Namespace Prefix:	pgc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- Details

Name:	us-gaap_RetirementPlanNameAxis=pgc_Retirement401KPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: