XML 100 R123.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Fair Value - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Impaired loans, recorded investment | $ 24,657 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance | $ 19,808 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Impaired loans allowance | 3,415 us-gaap_ImpairedFinancingReceivableRelatedAllowance | 1,882 us-gaap_ImpairedFinancingReceivableRelatedAllowance
Pooled SBA [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Residential mortgage and asset backed securities |  | 52,631 us-gaap_FairValueAssetsLevel1ToLevel2TransfersAmount / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = ccne_PooledSbaMember
Collateral Dependent Loans [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Impaired loans, recorded investment | 7,423 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CollateralDependentLoansMember | 8,161 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CollateralDependentLoansMember
Impaired loans allowance | 2,250 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CollateralDependentLoansMember | 1,455 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CollateralDependentLoansMember
Impaired loans, additional provisions | $ 801 ccne_ImpairedFinancingReceivableAdditionalProvisions / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CollateralDependentLoansMember | $ 1,455 ccne_ImpairedFinancingReceivableAdditionalProvisions / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ccne_CollateralDependentLoansMember

X
- Definition Impaired financing receivable additional provisions. + References No definition available. + Details
Name: | ccne_ImpairedFinancingReceivableAdditionalProvisions
Namespace Prefix: | ccne_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsLevel1ToLevel2TransfersAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableRelatedAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_EligibleItemOrGroupForFairValueOptionAxis=ccne_CollateralDependentLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=ccne_PooledSbaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |