Loans - Purchased Credit Deteriorated Loans (Details) $ in Thousands	Jul. 17, 2020 USD ($)
Receivables [Abstract]
Purchase price of loans at acquisition	$ 21,768
Allowance for credit losses at acquisition	980
Non-credit discount / (premium) at acquisition	1,063
Par value of acquired loans at acquisition	$ 23,811

Financing Receivable Purchase Price of Loans At Acquisition

No definition available.

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Namespace Prefix:	ccne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant