XML 185 R116.htm IDEA: XBRL DOCUMENT
v3.22.0.1

REGULATORY MATTERS - Capital Amounts and Ratios (Details) $ in Thousands | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | ---
Total capital to risk-weighted assets - actual amount | $ 287,614 | $ 260,015
Total capital to risk-weighted assets - actual ratio | 18.21 | 17.49
Total capital to risk-weighted assets - minimum to meet the corporation's policy thresholds amount | $ 165,846 | $ 156,113
Total capital to risk-weighted assets - minimum to meet the corporation's policy thresholds ratio | 10.50% | 10.50%
Tier 1 capital to risk-weighted assets - actual amount | $ 240,433 | $ 231,577
Tier 1 capital to risk-weighted assets - actual ratio | 15.22 | 15.58
Tier 1 capital to risk-weighted assets - minimum to meet the corporation's policy thresholds amount | $ 134,256 | $ 126,377
Tier 1 capital to risk-weighted assets - minimum to meet the corporation's policy thresholds ratio | 8.50% | 8.50%
Tier 1 capital to risk-weighted assets - minimum capital requirement with conservation buffer ratio | 8.50% |
Common equity Tier 1 - amount | $ 240,433 | $ 231,577
Common equity Tier 1 - ratio | 15.22 | 15.58
Common equity Tier 1 - minimum to meet the corporation's policy thresholds amount | $ 110,564 | $ 104,075
Common equity Tier 1 - minimum to meet the corporation's policy thresholds ratio | 7.00% | 7.00%
Tier 1 capital average - amount | $ 240,433 | $ 231,577
Tier 1 capital average - ratio | 10.53 | 10.34
Tier 1 capital average - minimum to meet the corporation's policy threshold amount | $ 182,683 | $ 179,206
Tier 1 capital average - minimum to meet the corporation's policy threshold ratio | 8.00% | 8.00%
Citizens and Northern Bank |  |
Total capital to risk-weighted assets - actual amount | $ 252,606 | $ 236,943
Total capital to risk-weighted assets - actual ratio | 16.04 | 15.98
Total capital to risk-weighted assets - minimum to meet the corporation's policy thresholds amount | $ 165,390 | $ 155,665
Total capital to risk-weighted assets - minimum to meet the corporation's policy thresholds ratio | 10.50% | 10.50%
Total capital to risk-weighted assets - minimum capital requirement amount | $ 126,012 | $ 118,602
Minimum total capital ratio | 8 | 8
Total capital to risk-weighted assets - minimum capital requirement with conservation buffer amount | $ 165,390 | $ 155,665
Total capital to risk-weighted assets - minimum capital requirement with conservation buffer ratio | 10.50% | 10.50%
Total capital to risk-weighted assets - minimum to be well capitalized under prompt corrective action provisions amount | $ 157,514 | $ 148,252
Total capital to risk-weighted assets - minimum to be well capitalized under prompt corrective action provisions ratio | 10 | 10
Tier 1 capital to risk-weighted assets - actual amount | $ 238,434 | $ 225,058
Tier 1 capital to risk-weighted assets - actual ratio | 15.14 | 15.18
Tier 1 capital to risk-weighted assets - minimum to meet the corporation's policy thresholds amount | $ 133,887 | $ 126,015
Tier 1 capital to risk-weighted assets - minimum to meet the corporation's policy thresholds ratio | 8.50% | 8.50%
Tier 1 capital to risk-weighted assets - minimum capital requirement amount | $ 94,509 | $ 88,951
Minimum tier 1 capital ratio | 6 | 6
Tier 1 capital to risk-weighted assets - minimum capital requirement with conservation buffer amount | $ 133,887 | $ 126,015
Tier 1 capital to risk-weighted assets - minimum capital requirement with conservation buffer ratio |  | 8.50%
Tier 1 capital to risk-weighted assets - minimum to be well capitalized under prompt corrective action provisions amount | $ 126,012 | $ 118,602
Tier 1 capital to risk-weighted assets - minimum to be well capitalized under prompt corrective action provisions ratio | 8 | 8
Common equity Tier 1 - amount | $ 238,434 | $ 225,058
Common equity Tier 1 - ratio | 15.14 | 15.18
Common equity Tier 1 - minimum to meet the corporation's policy thresholds amount | $ 110,260 | $ 103,777
Common equity Tier 1 - minimum to meet the corporation's policy thresholds ratio | 7.00% | 7.00%
Common equity Tier 1 - minimum capital requirement amount | $ 70,881 | $ 66,714
Minimum common equity tier 1 capital ratio | 4.50% | 4.50%
Common equity Tier 1 - capital conservation buffer amount | $ 110,260 | $ 103,777
Common equity Tier 1 - capital conservation buffer ratio | 7.00% | 7.00%
Common equity Tier 1 Capital - minimum to be well capitalized under prompt corrective action provisions amount | $ 102,384 | $ 96,364
Common equity Tier 1 Capital - minimum to be well capitalized under prompt corrective action provisions ratio | 6.50% | 6.50%
Tier 1 capital average - amount | $ 238,434 | $ 225,058
Tier 1 capital average - ratio | 10.52 | 10.12
Tier 1 capital average - minimum to meet the corporation's policy threshold amount | $ 181,376 | $ 177,919
Tier 1 capital average - minimum to meet the corporation's policy threshold ratio | 8.00% | 8.00%
Tier 1 capital average - minimum capital amount | $ 90,688 | $ 88,959
Tier 1 capital average - minimum capital ratio | 4 | 4
Tier 1 capital average - minimum to be well capitalized amount | $ 113,360 | $ 111,199
Tier 1 capital average - minimum to be well capitalized ratio | 5 | 5

X
- Definition The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action and including the current capital conservation buffer. + References No definition available. + Details
Name: | cznc_CapitalRequiredForCapitalAdequacyIncludingConservationBuffer
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action including the capital conservation buffer. + References No definition available. + Details
Name: | cznc_CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsIncludingCapitalConservationBuffer
Namespace Prefix: | cznc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of Total Capital required to be categorized as well as capitalized under the corporation's policy thresholds. + References No definition available. + Details
Name: | cznc_CapitalRequiredToMeetTheCorporationsPolicyThresholds
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The Total risk based capital ratio (total capital divided by risk weighted assets) required to meet the corporation's policy thresholds. + References No definition available. + Details
Name: | cznc_CapitalRequiredToMeetTheCorporationsPolicyThresholdsToRiskWeightedAssets
Namespace Prefix: | cznc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The minimum amount of Common Equity Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action including capital conservation buffer. + References No definition available. + Details
Name: | cznc_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyIncludingCapitalConservationBuffer
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum Common Equity Tier 1 Risk Based Capital Ratio (Common Equity Tier 1 Capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References No definition available. + Details
Name: | cznc_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | cznc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The minimum Common Equity Tier 1 Risk Based Capital Ratio (Common Equity Tier 1 Capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action including capital conservation buffer. + References No definition available. + Details
Name: | cznc_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsIncludingCapitalConservationBuffer
Namespace Prefix: | cznc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The Common Equity Tier 1 Risk Based Capital ratio (Common Equity Tier 1 Capital divided by risk-weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. + References No definition available. + Details
Name: | cznc_CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAsset
Namespace Prefix: | cznc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The minimum amount of Common Equity Tier 1 Risk Based Capital required to meet the Corporation's policy thresholds. + References No definition available. + Details
Name: | cznc_CommonEquityTierOneRiskBasedCapitalRequiredToMeetTheCorporationsPolicyThresholds
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum Common Equity Tier 1 Risk Based Capital Ratio (Common Equity Tier 1 Capital divided by risk-weighted assets) required to meet the Corporation's policy thresholds. + References No definition available. + Details
Name: | cznc_CommonEquityTierOneRiskBasedCapitalRequiredToMeetTheCorporationsPolicyThresholdsToRiskWeightedAssets
Namespace Prefix: | cznc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The minimum amount of Tier 1 Risk Based Capital required for to meet the corporation's policy thresholds. + References No definition available. + Details
Name: | cznc_TierOneCapitalRequiredToMeetTheCorporationsPolicyThresholds
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required to meet the corporation's policy thresholds. + References No definition available. + Details
Name: | cznc_TierOneCapitalRequiredToMeetTheCorporationsPolicyThresholdsToRiskWeightedAssets
Namespace Prefix: | cznc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The minimum amount of Tier 1 Leverage Capital required to meet Corporation's policy threshold. + References No definition available. + Details
Name: | cznc_TierOneLeverageCapitalRequiredToMeetCorporationsPolicyThreshold
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount of Tier 1 Leverage Capital to meet Corporation's policy threshold divided by average assets as defined in the regulations. + References No definition available. + Details
Name: | cznc_TierOneLeverageCapitalRequiredToMeetCorporationsPolicyThresholdToAverageAssets
Namespace Prefix: | cznc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The minimum amount of Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action including the conservation buffer. + References No definition available. + Details
Name: | cznc_TierOneRiskBasedCapitalRequiredForCapitalAdequacyIncludingConservationBuffer
Namespace Prefix: | cznc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action including the capital conservation buffer. + References No definition available. + Details
Name: | cznc_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsIncludingCapitalConservationBuffer
Namespace Prefix: | cznc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of total capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_Capital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum total risk-based capital required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 + Details
Name: | us-gaap_CapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum total risk-based capital to risk-weighted assets required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of minimum total risk-based capital categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalRequiredToBeWellCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum total risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ratio of total risk-based capital to risk-weighted assets as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_CapitalToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of Common Equity Tier 1 risk-based capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_CommonEquityTierOneCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of Common Equity Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_CommonEquityTierOneCapitalRatio
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of minimum Common Equity Tier 1 risk-based capital required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 + Details
Name: | us-gaap_CommonEquityTierOneCapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum Common Equity Tier 1 risk-based capital categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_CommonEquityTierOneCapitalRequiredToBeWellCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of Tier 1 leverage capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum Tier 1 leverage capital required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum Tier 1 leverage capital to average assets required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of minimum Tier 1 leverage capital categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum Tier 1 leverage capital to average assets categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ratio of Tier 1 capital to average assets as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneLeverageCapitalToAverageAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of Tier 1 risk-based capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of minimum Tier 1 risk-based capital required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum Tier 1 risk-based capital to risk-weighted assets required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of minimum Tier 1 risk-based capital categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of minimum Tier 1 risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ratio of Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=cznc_CitizensAndNorthernBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |