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BENEFIT PLANS (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Enhanced benefit in defined benefit plan   $ 850pgc_DefinedBenefitPlanEnhancedBenefit $ 856pgc_DefinedBenefitPlanEnhancedBenefit
401(K) Plan [Member]      
Contributions to the plan 1,400us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
/ us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis
= pgc_Retirement401KPlanMember		 1,900us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
/ us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis
= pgc_Retirement401KPlanMember		 1,800us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
/ us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis
= pgc_Retirement401KPlanMember
Profit Sharing [Member]      
Contributions to the plan   $ 200us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
/ us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis
= us-gaap_DeferredProfitSharingMember		 $ 200us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
/ us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis
= us-gaap_DeferredProfitSharingMember