XML 97 R87.htm IDEA: XBRL DOCUMENT
v3.23.2

Regulatory Capital Matters (Details Textual) | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Regulatory Matters (Additional Textual) [Abstract] |  |
Common equity tier 1 capital to risk-weighted assets, capital conservation buffer ratio | 2.50% |
Tier 1 capital to risk-weighted assets, capital conservation buffer ratio | 2.50% |
Total capital to risk-weighted assets, capital conservation buffer ratio | 2.50% |
Minimum ratio of common equity tier 1 capital to risk-weighted assets | 4.50% | 4.50%
Minimum ratio of tier 1 capital to risk-weighted assets | 0.060 | 0.060
Minimum ratio of total capital to risk-weighted assets | 0.080 | 0.080
Minimum leverage ratio | 0.040 | 0.040
Farmers National Banc Corp |  |
Regulatory Matters (Additional Textual) [Abstract] |  |
Minimum ratio of common equity tier 1 capital to risk-weighted assets | 4.50% | 4.50%
Minimum ratio of tier 1 capital to risk-weighted assets | 0.060 | 0.060
Minimum ratio of total capital to risk-weighted assets | 0.080 | 0.080
Minimum leverage ratio | 0.040 | 0.040

X
- Definition Capital required for capital adequacy to risk weighted assets capital conservation buffer ratio. + References No definition available. + Details
Name: | fmnb_CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsCapitalConservationBufferRatio
Namespace Prefix: | fmnb_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Regulatory Matters (Additional Textual) [Abstract] + References No definition available. + Details
Name: | fmnb_RegulatoryMattersAdditionalTextualAbstract
Namespace Prefix: | fmnb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tier one risk based capital required for capital adequacy to risk weighted assets capital conservation buffer ratio. + References No definition available. + Details
Name: | fmnb_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsCapitalConservationBufferRatio
Namespace Prefix: | fmnb_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Tier one risk based common capital required for capital adequacy to risk weighted assets. + References No definition available. + Details
Name: | fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | fmnb_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Tier one risk based common capital required for capital adequacy to risk weighted assets capital conservation buffer ratio. + References No definition available. + Details
Name: | fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsCapitalConservationBufferRatio
Namespace Prefix: | fmnb_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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 -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1B + Details
Name: | us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
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 -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1B + Details
Name: | us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
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 -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1B + Details
Name: | us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |