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Short-Term Borrowings (Narrative) (Details) (USD $)
Dec. 31, 2014
Sep. 30, 2014
Dec. 31, 2013
Short-term Borrowings      
Revolving Line of Credit $ 283,231,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity   $ 217,397,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Federal Funds Available from Correspondent Banks 20,000,000pebo_FederalFundsAvailableFromCorrespondentBanks    
Unused line of credit, fixed rate 3.50%us-gaap_DebtInstrumentInterestRateStatedPercentage 3.50%us-gaap_DebtInstrumentInterestRateStatedPercentage 3.80%us-gaap_DebtInstrumentInterestRateStatedPercentage
Holding Company      
Short-term Borrowings      
Revolving Line of Credit $ 10,000,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember		   $ 5,000,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Unused line of credit, fixed rate 3.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember