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LOANS (Narrative) (Details) (USD $)
1 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
LOANS [Abstract]        
Unamortized discount on loans     $ 396,000pgc_FinancingReceivablesUnamortizedDiscountsOrPremiums  
Impaired non-accrual loans   6,850,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus 6,630,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus  
Impaired non-accrual loans performing troubled debt restructured   13,600,000pgc_ImpairedNonAccrualLoansPerformingTroubledDebtRestructuring 11,100,000pgc_ImpairedNonAccrualLoansPerformingTroubledDebtRestructuring  
Allowance allocated to troubled debt restructured loans   892,000pgc_AllowanceOnTroubledDebtRestructuring 1,700,000pgc_AllowanceOnTroubledDebtRestructuring  
Allowance allocated to non accrual loans   204,000pgc_AllowanceOnNonAccrualLoansTroubledDebtRestructuring 740,000pgc_AllowanceOnNonAccrualLoansTroubledDebtRestructuring  
Impaired loans   20,451,000us-gaap_ImpairedFinancingReceivableRecordedInvestment 17,744,000us-gaap_ImpairedFinancingReceivableRecordedInvestment  
Troubled debt restructurings specific reserves to customers   892,000pgc_FinancingReceivableModificationsSpecificReservesRecordedInvestment 1,600,000pgc_FinancingReceivableModificationsSpecificReservesRecordedInvestment  
Amount of loans sold 67,000,000pgc_LoansAndLeasesReceivableAmountOfLoansSold      
Gain on loans held for sale at lower of cost or fair value $ 166,000pgc_GainLossOnLoansHeldForSaleAtLowerOfCostOrFairValue $ 166,000pgc_GainLossOnLoansHeldForSaleAtLowerOfCostOrFairValue $ 522,000pgc_GainLossOnLoansHeldForSaleAtLowerOfCostOrFairValue