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Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Securities Available For Sale: |  |
Securities available for sale | $ 685,720 us-gaap_AvailableForSaleSecurities | $ 685,991 us-gaap_AvailableForSaleSecurities
Trading Securities: |  |
Trading securities | 4,505 us-gaap_TradingSecurities | 4,127 us-gaap_TradingSecurities
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 1,002 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 985 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Trading Securities: |  |
Trading securities | 4,296 us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 3,923 us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Liabilities, |  |
Interest rate swaps | 0 us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 0 us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Significant Other Observable Inputs (Level 2) [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 683,813 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 684,345 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Trading Securities: |  |
Trading securities | 209 us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 204 us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Liabilities, |  |
Interest rate swaps | (946)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | (1,116)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Significant Unobservable Inputs (Level 3) [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 905 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 661 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Trading Securities: |  |
Trading securities | 0 us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 0 us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Liabilities, |  |
Interest rate swaps | 0 us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 0 us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Fair Value Measurement on Recurring Basis [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 685,720 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 685,991 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Trading Securities: |  |
Trading securities | 4,505 us-gaap_TradingSecurities / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 4,127 us-gaap_TradingSecurities / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | U.S. Treasury [Member] |  |
Securities Available For Sale: |  |
Securities available for sale |  | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | U.S. Government Sponsored Entities [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 155,564 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 181,625 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Trading Securities: |  |
Trading securities | 54 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 52 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | States and Political Subdivisions [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 181,002 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 177,943 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Residential and Multi-Family Mortgage [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 265,164 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_ResidentialAndMultiFamilyMortgageMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 242,607 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_ResidentialAndMultiFamilyMortgageMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Commercial Mortgage [Member] |  |
Securities Available For Sale: |  |
Securities available for sale |  | 374 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialMortgageBackedSecuritiesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Corporate Notes and Bonds [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 19,430 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CorporateNotesAndBondsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 14,075 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CorporateNotesAndBondsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Trading Securities: |  |
Trading securities | 157 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CorporateNotesAndBondsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 152 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CorporateNotesAndBondsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Pooled Trust Preferred [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 905 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_PooledTrustPreferredMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 661 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_PooledTrustPreferredMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Pooled SBA [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 62,653 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_PooledSbaMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 67,721 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_PooledSbaMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Other Securities [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 1,002 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_OtherSecuritiesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 985 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_OtherSecuritiesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Corporate Equity Securities [Member] |  |
Trading Securities: |  |
Trading securities | 3,044 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_EquitySecuritiesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 2,705 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_EquitySecuritiesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Certificates of Deposit [Member] |  |
Trading Securities: |  |
Trading securities | 253 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 253 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | International Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 265 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_InternationalMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 259 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_InternationalMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Large Cap Growth Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 186 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_LargeCapGrowthMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 197 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_LargeCapGrowthMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Money Market Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 132 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 124 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Large Cap Value Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 155 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_LargeCapValueMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 129 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_LargeCapValueMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Real Estate Investment Trust Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 46 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_RealEstateFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 39 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_RealEstateFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Small Cap Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 80 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_SmallCapMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 83 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_SmallCapMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Mid Cap Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 83 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_MidCapMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 84 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_MidCapMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Commodities Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 50 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CommodityLinkedMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 50 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CommodityLinkedMutualFundsMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Interest Rate Swaps [Member] |  |
Liabilities, |  |
Interest rate swaps | (946)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_InterestRateSwapMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | (1,116)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_InterestRateSwapMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 1,002 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 985 us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Trading Securities: |  |
Trading securities | 4,296 us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 3,923 us-gaap_TradingSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Treasury [Member] |  |
Securities Available For Sale: |  |
Securities available for sale |  | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Government Sponsored Entities [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Trading Securities: |  |
Trading securities | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | States and Political Subdivisions [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Residential and Multi-Family Mortgage [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_ResidentialAndMultiFamilyMortgageMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_ResidentialAndMultiFamilyMortgageMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Commercial Mortgage [Member] |  |
Securities Available For Sale: |  |
Securities available for sale |  | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialMortgageBackedSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate Notes and Bonds [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CorporateNotesAndBondsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CorporateNotesAndBondsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Trading Securities: |  |
Trading securities | 157 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CorporateNotesAndBondsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CorporateNotesAndBondsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Pooled Trust Preferred [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_PooledTrustPreferredMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_PooledTrustPreferredMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Pooled SBA [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_PooledSbaMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_PooledSbaMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Securities [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 1,002 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 985 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate Equity Securities [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Certificates of Deposit [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | International Mutual Funds [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Large Cap Growth Mutual Funds [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Money Market Mutual Funds [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Large Cap Value Mutual Funds [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Real Estate Investment Trust Mutual Funds [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Small Cap Mutual Funds [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mid Cap Mutual Funds [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Commodities Mutual Funds [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Interest Rate Swaps [Member] |  |
Liabilities, |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Securities Available For Sale: |  |
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Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasury [Member] |  |
Securities Available For Sale: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Sponsored Entities [Member] |  |
Securities Available For Sale: |  |
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Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | States and Political Subdivisions [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 181,002 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 177,943 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Residential and Multi-Family Mortgage [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 265,164 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_ResidentialAndMultiFamilyMortgageMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 242,607 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_ResidentialAndMultiFamilyMortgageMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commercial Mortgage [Member] |  |
Securities Available For Sale: |  |
Securities available for sale |  | 374 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialMortgageBackedSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Notes and Bonds [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 19,430 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CorporateNotesAndBondsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 14,075 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CorporateNotesAndBondsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Pooled Trust Preferred [Member] |  |
Securities Available For Sale: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Pooled SBA [Member] |  |
Securities Available For Sale: |  |
Securities available for sale | 62,653 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_PooledSbaMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 67,721 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_PooledSbaMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other Securities [Member] |  |
Securities Available For Sale: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Equity Securities [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Certificates of Deposit [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | International Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_InternationalMutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_InternationalMutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Large Cap Growth Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_LargeCapGrowthMutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_LargeCapGrowthMutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Money Market Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_MoneyMarketFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Large Cap Value Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 155 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_LargeCapValueMutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_LargeCapValueMutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Real Estate Investment Trust Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_RealEstateFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_RealEstateFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Small Cap Mutual Funds [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mid Cap Mutual Funds [Member] |  |
Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commodities Mutual Funds [Member] |  |
Trading Securities: |  |
Trading securities | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CommodityLinkedMutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | 0 us-gaap_TradingSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CommodityLinkedMutualFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Interest Rate Swaps [Member] |  |
Liabilities, |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Securities Available For Sale: |  |
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Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Treasury [Member] |  |
Securities Available For Sale: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Government Sponsored Entities [Member] |  |
Securities Available For Sale: |  |
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Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | States and Political Subdivisions [Member] |  |
Securities Available For Sale: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Residential and Multi-Family Mortgage [Member] |  |
Securities Available For Sale: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Commercial Mortgage [Member] |  |
Securities Available For Sale: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Corporate Notes and Bonds [Member] |  |
Securities Available For Sale: |  |
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Securities Available For Sale: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Pooled SBA [Member] |  |
Securities Available For Sale: |  |
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Securities Available For Sale: |  |
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Trading Securities: |  |
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Trading Securities: |  |
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Trading Securities: |  |
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Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Large Cap Growth Mutual Funds [Member] |  |
Trading Securities: |  |
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Trading Securities: |  |
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Trading Securities: |  |
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Trading Securities: |  |
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Trading Securities: |  |
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Trading Securities: |  |
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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