XML 54 R59.htm IDEA: XBRL DOCUMENT
v3.20.1

Note 7 - Loans - Troubled Debt Restructurings (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($)
Troubled debt restructurings, number of contracts | 1 | 11
Troubled debt restructurings, post-modification recorded investment | $ 30 | $ 550
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Senior Lien [Member] | Monthly Payment Reduction and Extended Maturity Date [Member] |  |
Troubled debt restructurings, number of contracts | 0 | 1
Troubled debt restructurings, post-modification recorded investment | $ 0 | $ 271
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Junior Lien [Member] | Monthly Payment Reduction and Extended Maturity Date [Member] |  |
Troubled debt restructurings, number of contracts | 0 | 1
Troubled debt restructurings, post-modification recorded investment | $ 0 | $ 18
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Junior Lien [Member] | New Loan at Lower Than Risk-adjusted Market Rate to Borrower [Member] |  |
Troubled debt restructurings, number of contracts | 1 | 0
Troubled debt restructurings, post-modification recorded investment | $ 30 | $ 0
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Monthly Payment Reduction and Extended Maturity Date [Member] |  |
Troubled debt restructurings, number of contracts | 0 | 8
Troubled debt restructurings, post-modification recorded investment | $ 0 | $ 177
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Monthly Payment Reduction and Extended Maturity Date [Member] |  |
Troubled debt restructurings, number of contracts | 0 | 1
Troubled debt restructurings, post-modification recorded investment | $ 0 | $ 84

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LienCategoryAxis=us-gaap_SeniorLienMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=cznc_MonthlyPaymentReductionAndExtendedMaturityDateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LienCategoryAxis=us-gaap_JuniorLienMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=cznc_NewLoanAtLowerThanRiskAdjustedMarketRateToBorrowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cznc_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cznc_AgriculturalLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |