XML 152 R124.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Revenue from Contracts with Customers - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2018
Revenue from Contract with Customer [Abstract] |
Percentage of primary source of revenue | 90.70%

X
- Definition Contract with Customer, Percentage of Primary Source of Revenue + References No definition available. + Details
Name: | ccne_ContractwithCustomerPercentageofPrimarySourceofRevenue
Namespace Prefix: | ccne_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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