XML 157 R124.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Fair Value - Quantitative Information about Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on Non Recurring Basis (Detail) - Impaired Loans - Commercial Mortgages [Member] - Sales Comparison Valuation Technique [Member] - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair value | $ 2,067 | $ 2,247
Minimum [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Sales comparison approach | 14.00% | 25.00%
Maximum [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Sales comparison approach | 98.00% | 69.00%
Weighted Average [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Sales comparison approach | (34.00%) | (36.00%)

X
- Definition Fair value valuation techniques negative adjustments for market conditions. + References No definition available. + Details
Name: | ccne_FairValueValuationTechniquesNegativeAdjustmentsForMarketConditions
Namespace Prefix: | ccne_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureNonrecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=ccne_ImpairedLoansCommercialMortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=ccne_SalesComparisonValuationTechniqueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |