XML 132 R80.htm IDEA: XBRL DOCUMENT
v3.24.0.1

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Additional information (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) item | Dec. 31, 2022 USD ($)
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total | $ 4,459,000 | $ 4,725,000
Interest income on nonaccrual loans | $ 932,000 |
Financing Receivable, Individually Evaluated for Impairment, Number of Extension for Credit Graded | item | 1 |
Estimated loss amount of financing receivables | $ 100,000 |
Allowance for credit losses on off-balance sheet exposures | 690,000 | $ 425,000
Commercial |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |
Threshold amount of financing receivables for credit losses | $ 200,000 |
Threshold amount of financing receivables of TDR | 200,000 |
Residential mortgage |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |
Threshold amount of financing receivables for credit losses | $ 400,000 |
Consumer |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |
Threshold amount of financing receivables for credit losses | $ 400,000 |
Other Loans |  |
LOANS AND ALLOWANCE FOR CREDIT LOSSES |  |
Threshold amount of financing receivables of TDR | 400,000 |

X
- Definition Estimated loss amount of financing receivables for credit losses review that were individually evaluated for impairment and classified as trouble debt restructuring. + References No definition available. + Details
Name: | cznc_FinancingReceivableIndividuallyEvaluatedForImpairmentClassifiedAsTroubleDebtRestructuringEstimatedLossAmount
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The threshold amount of financing receivables for credit losses review that were individually evaluated for impairment and classified as trouble debt restructuring. + References No definition available. + Details
Name: | cznc_FinancingReceivableIndividuallyEvaluatedForImpairmentClassifiedAsTroubleDebtRestructuringThresholdAmount
Namespace Prefix: | cznc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of extensions of credit grade financing receivables for credit losses review that were individually evaluated for impairment. + References No definition available. + Details
Name: | cznc_FinancingReceivableIndividuallyEvaluatedForImpairmentNumberOfExtensionForCreditGraded
Namespace Prefix: | cznc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The threshold amount of financing receivables for credit losses review that were individually evaluated for impairment. + References No definition available. + Details
Name: | cznc_FinancingReceivableIndividuallyEvaluatedForImpairmentThresholdAmount
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of interest income on financing receivable on nonaccrual status. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 + Details
Name: | us-gaap_FinancingReceivableNonaccrualInterestIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unamortized loan commitment, origination, and other costs (fees) and purchase premium (discount) on financing receivable recognized as adjustment to yield. Excludes financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481598/310-20-45-1 Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 3 -SubTopic 20 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481569/310-20-50-3 + Details
Name: | us-gaap_FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482454/460-10-45-1 + Details
Name: | us-gaap_OffBalanceSheetCreditLossLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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

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

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