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Short-Term Borrowings (Short Term Borrowing) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Short-term Borrowings      
Short-term borrowings $ 88,277us-gaap_ShortTermBorrowings $ 113,590us-gaap_ShortTermBorrowings  
Interest on short-term borrowings 146us-gaap_InterestExpenseShortTermBorrowings 114us-gaap_InterestExpenseShortTermBorrowings 74us-gaap_InterestExpenseShortTermBorrowings
Retail Repurchase Agreements      
Short-term Borrowings      
Short-term borrowings 73,277us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 42,590us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 32,769us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember
Average balance 59,324us-gaap_ShorttermDebtAverageOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 37,077us-gaap_ShorttermDebtAverageOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 37,386us-gaap_ShorttermDebtAverageOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember
Highest month-end balance 76,459us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 46,850us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 44,905us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember
Interest on short-term borrowings 99us-gaap_InterestExpenseShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 58us-gaap_InterestExpenseShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 57us-gaap_InterestExpenseShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember
Weighted Average Interest Rate, End of Year 0.17%us-gaap_ShortTermDebtWeightedAverageInterestRate
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 0.16%us-gaap_ShortTermDebtWeightedAverageInterestRate
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 0.15%us-gaap_ShortTermDebtWeightedAverageInterestRate
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember
Weighted Average Interest Rate, During the Year 0.17%pebo_ShortTermDebtWeightedAverageInterestRatePeriod
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 0.16%pebo_ShortTermDebtWeightedAverageInterestRatePeriod
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember		 0.15%pebo_ShortTermDebtWeightedAverageInterestRatePeriod
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_RepurchaseAgreementsMember
FHLB Advances      
Short-term Borrowings      
Short-term borrowings 15,000us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 71,000us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 15,000us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember
Average balance 36,678us-gaap_ShorttermDebtAverageOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 44,127us-gaap_ShorttermDebtAverageOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 13,240us-gaap_ShorttermDebtAverageOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember
Highest month-end balance 108,000us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 92,500us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 39,900us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember
Interest on short-term borrowings 47us-gaap_InterestExpenseShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 55us-gaap_InterestExpenseShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 17us-gaap_InterestExpenseShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember
Weighted Average Interest Rate, End of Year 0.14%us-gaap_ShortTermDebtWeightedAverageInterestRate
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 0.14%us-gaap_ShortTermDebtWeightedAverageInterestRate
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 0.15%us-gaap_ShortTermDebtWeightedAverageInterestRate
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember
Weighted Average Interest Rate, During the Year 0.13%pebo_ShortTermDebtWeightedAverageInterestRatePeriod
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 0.12%pebo_ShortTermDebtWeightedAverageInterestRatePeriod
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember		 0.12%pebo_ShortTermDebtWeightedAverageInterestRatePeriod
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalHomeLoanBankAdvancesMember
Other Short-Term Borrowings      
Short-term Borrowings      
Short-term borrowings 0us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 0us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 0us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember
Average balance 38us-gaap_ShorttermDebtAverageOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 90us-gaap_ShorttermDebtAverageOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 15us-gaap_ShorttermDebtAverageOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember
Highest month-end balance 0us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 0us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 0us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember
Interest on short-term borrowings $ 0us-gaap_InterestExpenseShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 $ 1us-gaap_InterestExpenseShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 $ 0us-gaap_InterestExpenseShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember
Weighted Average Interest Rate, End of Year 0.00%us-gaap_ShortTermDebtWeightedAverageInterestRate
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 0.00%us-gaap_ShortTermDebtWeightedAverageInterestRate
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 0.00%us-gaap_ShortTermDebtWeightedAverageInterestRate
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember
Weighted Average Interest Rate, During the Year 0.75%pebo_ShortTermDebtWeightedAverageInterestRatePeriod
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 0.74%pebo_ShortTermDebtWeightedAverageInterestRatePeriod
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember		 0.74%pebo_ShortTermDebtWeightedAverageInterestRatePeriod
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_FederalFundsPurchasedMember