SECURITIES - Debt Securities (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
SECURITIES
Unrealized gain (loss)	$ (71,857,000)	$ 6,087,000
Unrealized gain (loss), as percent to amortized cost	(12.80%)	1.20%

The percentage of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) to its amortized cost.

No definition available.

Name:	cznc_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossPercent
Namespace Prefix:	cznc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant