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LOANS - Loans Modified Under Covid-19 Program (Details) $ in Thousands | Sep. 30, 2020 USD ($) loan
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LOANS |
Loans Modified, Number of Loans | loan | 44
Loans Modified, Recorded Investment | $ | $ 41,639
Residential mortgage |
LOANS |
Loans Modified, Number of Loans | loan | 16
Loans Modified, Recorded Investment | $ | $ 1,727
Commercial |
LOANS |
Loans Modified, Number of Loans | loan | 28
Loans Modified, Recorded Investment | $ | $ 39,912

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- Definition Number of principal payment deferrals on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19. + References No definition available. + Details
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Namespace Prefix: | cznc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Deferred amounts of principal payments on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19. + References No definition available. + Details
Name: | cznc_FinancingReceivablePrincipalDeferredPayments
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |