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LOANS - Components of Purchase Account Adjustments on PCI Loans acquired (Details) $ in Thousands | Jul. 01, 2020 USD ($)
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LOANS |
Contractually required principal at acquisition | $ 10,114
Non-accretable discount | (2,910)
Expected cash flows | $ 7,204

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- Definition The amount of contractually required principal at acquisition. + References No definition available. + Details
Name: | cznc_ContractuallyRequiredPrincipalAtAcquisition
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of expected cash flows. + References No definition available. + Details
Name: | cznc_ExpectedCashFlows
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of the loan's contractually required payments receivable in excess of the amount of its cash flows expected to be collected. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References No definition available. + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNonaccretableDifference
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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