XML 142 R109.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Deferred Compensation Plans - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2015
Compensation Related Costs [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_CompensationRelatedCostsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration