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Long-Term Borrowings (Narrative) (Details) (USD $)
 12 Months Ended 9 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Dec. 31, 2013
Long-term borrowings      
Proceeds from Issuance of Unsecured Debt $ 24,000,000us-gaap_ProceedsFromIssuanceOfUnsecuredDebt    
Maturity Period of Long-Term Borrowing 5 years    
Total Risk-Based Capital Ratio Minimum Under Debt Covenant     12.50%pebo_TotalRiskBasedCapitalRatioMinimumUnderDebtCovenant
Nonperforming Assets to Tangible Capital plus Allowance for Loan Losses Maximum Under Debt Covenant   20.00%pebo_NonperformingAssetsToTangibleCapitalPlusAllowanceForLoanLossesMaximumUnderDebtCovenant  
Allowance for Loan Losses to Nonperforming Loans Minimum Under Debt Covenant   70.00%pebo_AllowanceForLoanLossesToNonperformingLoansMinimumUnderDebtCovenant  
Fixed charge coverage ratio minimum required by debt covenant   125.00%pebo_Fixedchargecoverageratiominimumrequiredbydebtcovenant  
Other Restricted Assets   2,000,000us-gaap_OtherRestrictedAssets  
Callable national market repurchase agreements, Weighted-Average Rate 3.63%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate   3.63%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate
Minimum      
Long-term borrowings      
Repurchase agreements, maturities period   5 years  
Repurchase agreements, call option features at buyer discretion, initial call period   3 months  
Maximum      
Long-term borrowings      
Repurchase agreements, maturities period   10 years  
Repurchase agreements, call option features at buyer discretion, initial call period   5 years  
FHLB putable non-amortizing, fixed rate advances      
Long-term borrowings      
Long-term Federal Home Loan Bank Advances 83,995,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= pebo_FederalHomeLoanBankAdvancesFixedRatePutableNonAmortizingMember		   50,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= pebo_FederalHomeLoanBankAdvancesFixedRatePutableNonAmortizingMember
FHLB putable non-amortizing, fixed rate advances | Minimum      
Long-term borrowings      
FHLB advances, maturities period   10 years  
FHLB putable non-amortizing, fixed rate advances | Maximum      
Long-term borrowings      
FHLB advances, maturities period   20 years  
FHLB convertible rate advances | Minimum      
Long-term borrowings      
FHLB advances,fixed rate intial period   3 months  
FHLB convertible rate advances | Maximum      
Long-term borrowings      
FHLB advances,fixed rate intial period   5 years  
FHLB amortizing, fixed rate advances      
Long-term borrowings      
Long-term Federal Home Loan Bank Advances 40,719,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= pebo_FederalHomeLoanBankAdvancesFixedRateAmortizingMember		   12,679,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_LongtermDebtTypeAxis
= pebo_FederalHomeLoanBankAdvancesFixedRateAmortizingMember
FHLB amortizing, fixed rate advances | Minimum      
Long-term borrowings      
FHLB advances, maturities period   10 years  
FHLB amortizing, fixed rate advances | Maximum      
Long-term borrowings      
FHLB advances, maturities period   20 years  
Obtained in Third Quarter of 2014 [Member] | FHLB amortizing, fixed rate advances | Maximum      
Long-term borrowings      
Long-term Federal Home Loan Bank Advances   30,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_DebtInstrumentAxis
= pebo_ObtainedinThirdQuarterof2014Member
/ us-gaap_LongtermDebtTypeAxis
= pebo_FederalHomeLoanBankAdvancesFixedRateAmortizingMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember