XML 110 R75.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Loans - Loans by Class Modified as Troubled Debt Restructurings (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) Loans | Dec. 31, 2016 USD ($) Loans | Dec. 31, 2015 USD ($) Loans
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 19 | 15 |
Commercial, Industrial, and Agricultural [Member] |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 10 | 7 |
Commercial Mortgages [Member] |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 9 | 8 |
Residential Real Estate [Member] |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 0 | 0 |
Consumer [Member] |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 0 | 0 |
Credit Cards [Member] |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 0 | 0 |
Trouble Debt Restructuring [Member] |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 6 | 1 | 1
Pre-Modification Outstanding Recorded Investment | $ | $ 9,171 | $ 109 | $ 1,327
Post-Modification Outstanding Recorded Investment | $ | $ 9,171 | $ 109 | $ 1,327
Trouble Debt Restructuring [Member] | Commercial, Industrial, and Agricultural [Member] |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 4 | 1 | 1
Pre-Modification Outstanding Recorded Investment | $ | $ 2,750 | $ 109 | $ 1,327
Post-Modification Outstanding Recorded Investment | $ | $ 2,750 | $ 109 | $ 1,327
Trouble Debt Restructuring [Member] | Commercial Mortgages [Member] |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 2 | 0 | 0
Pre-Modification Outstanding Recorded Investment | $ | $ 6,421 | $ 0 | $ 0
Post-Modification Outstanding Recorded Investment | $ | $ 6,421 | $ 0 | $ 0
Trouble Debt Restructuring [Member] | Residential Real Estate [Member] |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 0 | 0 | 0
Pre-Modification Outstanding Recorded Investment | $ | $ 0 | $ 0 | $ 0
Post-Modification Outstanding Recorded Investment | $ | $ 0 | $ 0 | $ 0
Trouble Debt Restructuring [Member] | Consumer [Member] |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 0 | 0 | 0
Pre-Modification Outstanding Recorded Investment | $ | $ 0 | $ 0 | $ 0
Post-Modification Outstanding Recorded Investment | $ | $ 0 | $ 0 | $ 0
Trouble Debt Restructuring [Member] | Credit Cards [Member] |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | Loans | 0 | 0 | 0
Pre-Modification Outstanding Recorded Investment | $ | $ 0 | $ 0 | $ 0
Post-Modification Outstanding Recorded Investment | $ | $ 0 | $ 0 | $ 0

X
- Definition Schedule Of Financial Receivables [Line Items] + References No definition available. + Details
Name: | ccne_ScheduleOfFinancialReceivablesLineItems
Namespace Prefix: | ccne_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Pre-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ccne_CommercialIndustrialAndAgriculturalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ccne_CommercialMortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CreditCardReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TroubledDebtRestructuringDebtorSubsequentPeriodsAxis=ccne_TroubleDebtRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |