XML 31 R28.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Securities Available For Sale:    
Securities available for sale $ 655,400us-gaap_AvailableForSaleSecurities $ 685,720us-gaap_AvailableForSaleSecurities
Trading Securities:    
Trading securities 4,502us-gaap_TradingSecurities 4,505us-gaap_TradingSecurities
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Securities Available For Sale:    
Securities available for sale 1,005us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 1,002us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Trading Securities:    
Trading securities 4,290us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 4,296us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Liabilities,    
Interest rate swaps 0us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 0us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Significant Other Observable Inputs (Level 2) [Member]    
Securities Available For Sale:    
Securities available for sale 653,490us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 683,813us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Trading Securities:    
Trading securities 212us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 209us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Liabilities,    
Interest rate swaps (974)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 (946)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Significant Unobservable Inputs (Level 3) [Member]    
Securities Available For Sale:    
Securities available for sale 905us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 905us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Trading Securities:    
Trading securities 0us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 0us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Liabilities,    
Interest rate swaps 0us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 0us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Fair Value Measurement on Recurring Basis [Member]    
Securities Available For Sale:    
Securities available for sale 655,400us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 685,720us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 4,502us-gaap_TradingSecurities
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 4,505us-gaap_TradingSecurities
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Liabilities,    
Interest rate swaps (974)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 (946)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ 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 148,633us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 155,564us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 55us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 54us-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 180,697us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 181,002us-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 242,952us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_ResidentialAndMultiFamilyMortgageMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 265,164us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_ResidentialAndMultiFamilyMortgageMember
/ 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 19,536us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 19,430us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 157us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 157us-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 905us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_PooledTrustPreferredMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 905us-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 61,672us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_PooledSbaMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 62,653us-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 1,005us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_OtherSecuritiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 1,002us-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 3,034us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 3,044us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Mutual Funds [Member]    
Trading Securities:    
Trading securities 1,000us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_MutualFundMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 997us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_MutualFundMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Certificates of Deposit [Member]    
Trading Securities:    
Trading securities 256us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CertificatesOfDepositMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 253us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CertificatesOfDepositMember
/ 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 1,005us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 1,002us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 4,290us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 4,294us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Liabilities,    
Interest rate swaps 0us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ 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 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-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 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-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 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_ResidentialAndMultiFamilyMortgageMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-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] | Corporate Notes and Bonds [Member]    
Securities Available For Sale:    
Securities available for sale 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-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 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_PooledTrustPreferredMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-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 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_PooledSbaMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-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 1,005us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_OtherSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 1,002us-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:    
Trading securities 3,034us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 3,044us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember
/ 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] | Mutual Funds [Member]    
Trading Securities:    
Trading securities 1,000us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_MutualFundMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 997us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_MutualFundMember
/ 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] | Certificates of Deposit [Member]    
Trading Securities:    
Trading securities 256us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CertificatesOfDepositMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 253us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CertificatesOfDepositMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Securities Available For Sale:    
Securities available for sale 653,490us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 683,813us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 212us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 211us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Liabilities,    
Interest rate swaps (974)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 (946)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ 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] | U.S. Government Sponsored Entities [Member]    
Securities Available For Sale:    
Securities available for sale 148,633us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 155,564us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 55us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 54us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ 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] | States and Political Subdivisions [Member]    
Securities Available For Sale:    
Securities available for sale 180,697us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 181,002us-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 242,952us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_ResidentialAndMultiFamilyMortgageMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 265,164us-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] | Corporate Notes and Bonds [Member]    
Securities Available For Sale:    
Securities available for sale 19,536us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 19,430us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 157us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 157us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ 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] | Pooled Trust Preferred [Member]    
Securities Available For Sale:    
Securities available for sale 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_PooledTrustPreferredMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_PooledTrustPreferredMember
/ 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] | Pooled SBA [Member]    
Securities Available For Sale:    
Securities available for sale 61,672us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_PooledSbaMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 62,653us-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:    
Securities available for sale 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_OtherSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_OtherSecuritiesMember
/ 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 Equity Securities [Member]    
Trading Securities:    
Trading securities 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember
/ 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] | Mutual Funds [Member]    
Trading Securities:    
Trading securities 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_MutualFundMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_MutualFundMember
/ 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] | Certificates of Deposit [Member]    
Trading Securities:    
Trading securities 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CertificatesOfDepositMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CertificatesOfDepositMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Securities Available For Sale:    
Securities available for sale 905us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 905us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 0us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_TradingSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Liabilities,    
Interest rate swaps 0us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Government Sponsored Entities [Member]    
Securities Available For Sale:    
Securities available for sale 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | States and Political Subdivisions [Member]    
Securities Available For Sale:    
Securities available for sale 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Residential and Multi-Family Mortgage [Member]    
Securities Available For Sale:    
Securities available for sale 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_ResidentialAndMultiFamilyMortgageMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_ResidentialAndMultiFamilyMortgageMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Corporate Notes and Bonds [Member]    
Securities Available For Sale:    
Securities available for sale 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Trading Securities:    
Trading securities 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_CorporateNotesAndBondsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Pooled Trust Preferred [Member]    
Securities Available For Sale:    
Securities available for sale 905us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_PooledTrustPreferredMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 905us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_PooledTrustPreferredMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Pooled SBA [Member]    
Securities Available For Sale:    
Securities available for sale 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_PooledSbaMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_PooledSbaMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other Securities [Member]    
Securities Available For Sale:    
Securities available for sale 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_OtherSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_AvailableForSaleSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_OtherSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Corporate Equity Securities [Member]    
Trading Securities:    
Trading securities 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mutual Funds [Member]    
Trading Securities:    
Trading securities 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_MutualFundMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= ccne_MutualFundMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurement on Recurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Certificates of Deposit [Member]    
Trading Securities:    
Trading securities $ 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CertificatesOfDepositMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 $ 0us-gaap_TradingSecurities
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CertificatesOfDepositMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember