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Deferred Compensation Plans (Details Textual)	12 Months Ended
	Dec. 31, 2012
Deferred Compensation Plans (Textual) [Abstract]
Amount of fees or compensation deferred plus gains or net of losses over maximum period	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

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- Details

Name:	ccne_DeferredCompensationPlansTextualAbstract
Namespace Prefix:	ccne_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration