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Deferred Compensation Plans - Narrative (Details) | 12 Months Ended
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Dec. 31, 2024
Postemployment Benefits [Abstract] |
Maximum period for deferred compensation plan payment after individual's termination of service | 10 years

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- Definition Amount of fees or compensation deferred plus gains or net of losses over maximum period. + References No definition available. + Details
Name: | ccne_AmountOfFeesOrCompensationDeferredPlusGainsOrNetOfLossesOverMaximumPeriod
Namespace Prefix: | ccne_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_PostemploymentBenefitsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration