XML 135 R103.htm IDEA: XBRL DOCUMENT
v3.25.0.1

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Plan Assets Allocation (Details) | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS |  |
Percentage of plan assets | 100.00% | 100.00%
Cash and Cash Equivalents |  |
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS |  |
Percentage of plan assets | 100.00% | 54.00%
Debt Securities |  |
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS |  |
Percentage of plan assets | 0.00% | 18.00%
Equity Securities |  |
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS |  |
Percentage of plan assets | 0.00% | 24.00%
Alternative Funds |  |
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS |  |
Percentage of plan assets | 0.00% | 4.00%

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_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cznc_AlternativeFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |