XML 103 R77.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Loans (Details 9) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable Recorded Investment [Line Items] |  |
Loans | $ 3,268,346 | $ 3,198,127
Originated Loans |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 3,258,121 | 3,189,370
Residential real estate |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 845,539 | 843,561
Residential real estate | Performing Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 840,969 | 839,744
Residential real estate | Nonperforming Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 4,570 | 3,817
Residential real estate | Residential real estate, 1-4 family residential |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 845,539 | 843,561
Residential real estate | Residential real estate, 1-4 family residential | Originated Loans |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 845,081 | 843,697
Residential real estate | Residential real estate, 1-4 family residential | Performing Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 840,969 | 839,744
Residential real estate | Residential real estate, 1-4 family residential | Nonperforming Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 4,570 | 3,817
Residential real estate | Residential real estate, Home equity lines of credit |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 158,139 | 142,471
Residential real estate | Residential real estate, Home equity lines of credit | Originated Loans |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 158,014 | 142,441
Residential real estate | Residential real estate, Home equity lines of credit | Performing Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 157,636 | 141,952
Residential real estate | Residential real estate, Home equity lines of credit | Nonperforming Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 503 | 519
Consumer | Consumer, Indirect |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 241,355 | 234,886
Consumer | Consumer, Indirect | Originated Loans |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 232,822 | 226,815
Consumer | Consumer, Indirect | Performing Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 240,855 | 234,439
Consumer | Consumer, Indirect | Nonperforming Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 500 | 447
Consumer | Consumer, Direct |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 19,185 | 23,825
Consumer | Consumer, Direct | Originated Loans |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 19,143 | 23,805
Consumer | Consumer, Direct | Performing Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 19,085 | 23,690
Consumer | Consumer, Direct | Nonperforming Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 100 | 135
Consumer | Consumer, Other |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 7,993 | 9,164
Consumer | Consumer, Other | Originated Loans |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 7,989 | 9,164
Consumer | Consumer, Other | Performing Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | 7,993 | 9,159
Consumer | Consumer, Other | Nonperforming Financing Receivable |  |
Financing Receivable Recorded Investment [Line Items] |  |
Loans | $ 0 | $ 5

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 Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 29 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-29 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-13 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-7A Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 29 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-29 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (1) -Publisher SEC Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (2) -Publisher SEC Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph a -Publisher SEC Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-80 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-14 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fmnb_OriginatedLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_PerformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_NonperformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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