XML 87 R54.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Summary of Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($) Segment shares | Dec. 31, 2014 USD ($) shares | Dec. 31, 2013 USD ($) shares
Summary Of Significant Accounting Policies [Line Items] |  |  |
Number of reportable operating segment | Segment | 1 |  |
Maturity period of Interest bearing deposits in other financial institutions | 1 year |  |
Period of delinquent loan | 90 days |  |
Loss history of portfolio segment determination period | 2 years |  |
Advertising costs | $ 1,580,000 | $ 1,455,000 | $ 939,000
Number of nonqualified options or restricted stock for key employees and independent director | shares | 500,000 |  |
Description of award terms | For key employees, the plan vesting schedule is one-fourth of granted stock-based awards per year beginning one year after the grant date with 100% vested on the fourth anniversary. For independent directors, the vesting schedule is one-third of granted stock-based awards per year beginning one year after the grant date with 100% vested on the third anniversary. |  |
Unrecognized compensation cost related to nonvested stock options granted under this plan | $ 0 | $ 0 |
Stock options, granted | shares | 0 | 0 | 0
Shares granted, restricted common stock | shares | 48,300 | 35,400 | 31,500
Compensation expense restricted stock awards | $ 621,000 | $ 548,000 | $ 390,000
Average amount of non interest bearing reserve with federal reserve bank | $ 50,000 | $ 50,000 |
Independent Directors [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Starting period of vesting of stock based award | 1 year |  |
Aggregate percentage of stock based awards to be matured | 100.00% |  |
Key Employees [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Starting period of vesting of stock based award | 1 year |  |
Aggregate percentage of stock based awards to be matured | 100.00% |  |
Minimum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage of tax benefit realized | 50.00% |  |
Maximum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Period of Consumer loans charged off | 180 days |  |
Premises and Equipment [Member] | Minimum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Useful lives of premises and equipment | 3 years |  |
Premises and Equipment [Member] | Maximum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Useful lives of premises and equipment | 39 years |  |
Furniture, Fixtures and Equipment [Member] | Minimum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Useful lives of premises and equipment | 3 years |  |
Furniture, Fixtures and Equipment [Member] | Maximum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Useful lives of premises and equipment | 10 years |  |
Buildings and Building Improvements [Member] | Minimum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Useful lives of premises and equipment | 15 years |  |
Buildings and Building Improvements [Member] | Maximum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Useful lives of premises and equipment | 39 years |  |
Core Deposit [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Amortization of intangible assets | 7 years |  |

X
- Definition Aggregate percentage of stock based awards to me matured. + References No definition available. + Details
Name: | ccne_AggregatePercentageOfStockBasedAwardsToBeMatured
Namespace Prefix: | ccne_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Average amount of non interest bearing reserve with federal reserve bank. + References No definition available. + Details
Name: | ccne_AverageAmountOfNonInterestBearingReserveWithFederalReserveBank
Namespace Prefix: | ccne_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Delinquent period. + References No definition available. + Details
Name: | ccne_DelinquentPeriod
Namespace Prefix: | ccne_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss history of portfolio segment determination period. + References No definition available. + Details
Name: | ccne_LossHistoryOfPortfolioSegmentDeterminationPeriod
Namespace Prefix: | ccne_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maturity period of interest bearing deposits in other financial institutions. + References No definition available. + Details
Name: | ccne_MaturityPeriodOfInterestBearingDepositsInOtherFinancialInstitutions
Namespace Prefix: | ccne_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of nonqualified options or restricted stock for key employees and independent director. + References No definition available. + Details
Name: | ccne_NumberOfNonqualifiedOptionsOrRestrictedStockForKeyEmployeesAndIndependentDirector
Namespace Prefix: | ccne_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of tax benefit realized. + References No definition available. + Details
Name: | ccne_PercentageOfTaxBenefitRealized
Namespace Prefix: | ccne_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of consumer loans charged off. + References No definition available. + Details
Name: | ccne_PeriodOfConsumerLoansChargedOff
Namespace Prefix: | ccne_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Starting period of vesting of share based award. + References No definition available. + Details
Name: | ccne_StartingPeriodOfVestingOfShareBasedAward
Namespace Prefix: | ccne_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary Of Significant Accounting Policies [Line Items] + References No definition available. + Details
Name: | ccne_SummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix: | ccne_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
Name: | us-gaap_AdvertisingExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Unrecognized cost of unvested options awarded to employees as compensation. + References No definition available. + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
Name: | us-gaap_RestrictedStockExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=ccne_IndependentDirectorsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=ccne_KeyEmployeesMember
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_PropertyPlantAndEquipmentByTypeAxis=ccne_PremisesAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CoreDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |