XML 149 R126.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Note 18 - Regulatory Matters - Transition Schedule for New Ratios, Including the Capital Conservation Buffer (Details) - Phased in Beginning 2018 [Member] | Dec. 31, 2019
--- | ---
Minimum common equity tier 1 capital ratio | 4.50%
Minimum common equity tier 1 capital ratio plus capital conservation buffer | 7.00%
Minimum tier 1 capital ratio | 6.00%
Minimum tier 1 capital ratio plus capital conservation buffer | 8.50%
Minimum total capital ratio | 8.00%
Minimum total capital ratio plus capital conservation buffer | 10.50%

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: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The total of the minimum Common Equity Tier One Capital Ratio (Common Equity Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action and the capital conservation buffer. + References No definition available. + Details
Name: | cznc_MinimumCommonEquityTier1CapitalRatioPlusCapitalConservationBuffer
Namespace Prefix: | cznc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The total of 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 and the capital conservation buffer. + References No definition available. + Details
Name: | cznc_MinimumTierOneCapitalRatioPlusCapitalConservationBuffer
Namespace Prefix: | cznc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The total of 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 and the capital conservation buffer. + References No definition available. + Details
Name: | cznc_MinimumTotalCapitalRatioPlusCapitalConservationBuffer
Namespace Prefix: | cznc_
Data Type: | num:percentItemType
Balance Type: | na
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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=117337116&loc=d3e65071-112826 + Details
Name: | us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=117337116&loc=d3e65071-112826 + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_StatementScenarioAxis=cznc_PhasedInBeginning2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |