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

X

- 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

X

- References

No definition available.

+ Details

Name:	us-gaap_PostemploymentBenefitsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration