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6. Fair Value Measurements, Level of Hierarchy (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Estimated Fair Value	$ 282,575us-gaap_AvailableForSaleSecurities	$ 281,099us-gaap_AvailableForSaleSecurities
Mortgage-backed securities
Estimated Fair Value	88,553us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesMember	90,210us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesMember
Level 1 valuation	0PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesMember	0PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesMember
Level 2 valuation	88,553PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesMember	90,210PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesMember
Level 3 valuation	0PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesMember	0PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesMember
U.S. Government sponsored enterprises
Estimated Fair Value	37,362us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember	34,048us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Level 1 valuation	0PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember	0PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Level 2 valuation	37,362PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember	34,048PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Level 3 valuation	0PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember	0PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
State and political subdivisions
Estimated Fair Value	152,474us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	152,246us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Level 1 valuation	0PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	0PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Level 2 valuation	152,474PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	152,246PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Level 3 valuation	0PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember	0PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember
Corporate bonds
Estimated Fair Value	1,963us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CorporateBondSecuritiesMember	2,467us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CorporateBondSecuritiesMember
Level 1 valuation	0PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CorporateBondSecuritiesMember	0PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CorporateBondSecuritiesMember
Level 2 valuation	1,963PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CorporateBondSecuritiesMember	2,467PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CorporateBondSecuritiesMember
Level 3 valuation	0PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CorporateBondSecuritiesMember	0PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CorporateBondSecuritiesMember
Trust preferred securities
Estimated Fair Value	750us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember	750us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember
Level 1 valuation	0PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember	0PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember
Level 2 valuation	0PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember	0PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember
Level 3 valuation	750PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember	750PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember
Equity securities
Estimated Fair Value	1,473us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember	1,378us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember
Level 1 valuation	1,473PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember	1,378PEBK_AvailableforsaleSecuritiesLevelOneValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember
Level 2 valuation	0PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember	0PEBK_AvailableforsaleSecuritiesLevelTwoValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember
Level 3 valuation	$ 0PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember	$ 0PEBK_AvailableforsaleSecuritiesLevelThreeValuation / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember

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