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LEASES - Additional Information (Details)	Sep. 30, 2025 renewal
Leases [Abstract]
Number of renewal options (at least)	1

X

- Definition

Lease, Number Of Renewal Options

+ References

No definition available.

+ Details

Name:	ccne_LeaseNumberOfRenewalOptions
Namespace Prefix:	ccne_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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