English
Segment disclosures
Company overviewFARMERS NATIONAL BANC CORP /OH/
Each reported dimension combination stays separate. Revenue and operating income are shown as reported, with their dates and sources.
Revenue · Reported segment facts
Counts describe retained dimensioned rows only. Periods and members can change across reports, and this view does not infer missing values or expected segment totals.
Operating Segments · Debit Card And Electronic Funds Transfer Fees · Bank Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=fmnb:DebitCardAndElectronicFundsTransferFeesMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-04-01 – 2023-06-30 | 1810000 | USD | 20230808 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 1463000 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 4407000 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 2944000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 1416000 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 5144000 | USD | 20230309 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 1322000 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 2493000 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 4264000 | USD | 20230309 | Open filing evidence |
Operating Segments · Debit Card And Electronic Funds Transfer Fees · Trust Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=fmnb:DebitCardAndElectronicFundsTransferFeesMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 0 | USD | 20230505 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20230309 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 0 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20230309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20230309 | Open filing evidence |
Operating Segments · Insurance Agency Commissions · Trust Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=fmnb:InsuranceAgencyCommissionsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 0 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20230309 | Open filing evidence |
Operating Segments · Investment Commissions · Trust Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=fmnb:InvestmentCommissionsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 0 | USD | 20230505 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20230309 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 0 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20230309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20230309 | Open filing evidence |
Operating Segments · Retirement Plan Consulting Fees · Trust Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=fmnb:RetirementPlanConsultingFeesMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 334000 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1406000 | USD | 20240307 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 360000 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 1049000 | USD | 20231108 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 382000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 689000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 307000 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 1389000 | USD | 20240307 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 332000 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 1052000 | USD | 20231108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 323000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 720000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 397000 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 1421000 | USD | 20240307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 334000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 1043000 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 389000 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 709000 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 1523000 | USD | 20230309 | Open filing evidence |
Operating Segments · Retirement Plan Consulting · Bank Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=fmnb:RetirementPlanConsultingMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 0 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20260305 | Open filing evidence |
Operating Segments · Retirement Plan Consulting · Trust Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=fmnb:RetirementPlanConsultingMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 954000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 1840000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 886000 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 3650000 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1060000 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 2641000 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 783000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1581000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 798000 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 2637000 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 677000 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1918000 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 623000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1241000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 617000 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 2467000 | USD | 20260305 | Open filing evidence |
Operating Segments · Deposit Account · Bank Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:DepositAccountMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 1712000 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 4646000 | USD | 20231108 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 1501000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 2933000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 1432000 | USD | 20230505 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 4716000 | USD | 20230309 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 1229000 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 3513000 | USD | 20231108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 1139000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 2284000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 1145000 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 3660000 | USD | 20230309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 924000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 2522000 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 790000 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 1598000 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 3682000 | USD | 20230309 | Open filing evidence |
Operating Segments · Deposit Account · Trust Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:DepositAccountMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 0 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20230309 | Open filing evidence |
Operating Segments · Fiduciary And Trust · Bank Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:FiduciaryAndTrustMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 0 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20230309 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20230309 | Open filing evidence |
Operating Segments · Fiduciary And Trust · Trust Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:FiduciaryAndTrustMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 3089000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 6119000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 3030000 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 11061000 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 2745000 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 7982000 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 2596000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 5237000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 2641000 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 10099000 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 2544000 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 7398000 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2345000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 4854000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 2510000 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 9047000 | USD | 20260305 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 2617000 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 7453000 | USD | 20231108 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 2248000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 4835000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 2587000 | USD | 20230505 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 9638000 | USD | 20230309 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 2370000 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 7265000 | USD | 20231108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 2376000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 4895000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 2519000 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 9438000 | USD | 20230309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 2335000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 6930000 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 2358000 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 4594000 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 7632000 | USD | 20230309 | Open filing evidence |
Operating Segments · Bank Segment
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 84493000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 150146000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 65653000 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 229940000 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 58412000 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 171413000 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 56779000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 113001000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 56221000 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 222385000 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 56164000 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 165918000 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 55735000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 109755000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 54018000 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 208677000 | USD | 20260305 | Open filing evidence |
Operating Segments · Bank Segment · Debit Card And Electronic Funds Transfer Fees
Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=fmnb:DebitCardAndElectronicFundsTransferFeesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 1567000 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 7059000 | USD | 20240307 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 1763000 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 5362000 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 3599000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 1789000 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 5814000 | USD | 20240307 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 4407000 | USD | 20221108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 1528000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 2944000 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 5144000 | USD | 20240307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 1227000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 3720000 | USD | 20221108 | Open filing evidence |
Operating Segments · Bank Segment · Insurance Agency Commissions
Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=fmnb:InsuranceAgencyCommissionsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 1528000 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 5444000 | USD | 20240307 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 1116000 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 3904000 | USD | 20231108 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 1332000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 2788000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 1456000 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 4402000 | USD | 20240307 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 1136000 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 3269000 | USD | 20231108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 1086000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 2133000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 1047000 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 3456000 | USD | 20240307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 799000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 2750000 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 948000 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 1951000 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 3124000 | USD | 20230309 | Open filing evidence |
Operating Segments · Bank Segment · Investment Commissions
Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=fmnb:InvestmentCommissionsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 432000 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1978000 | USD | 20240307 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 520000 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 1389000 | USD | 20231108 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 476000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 869000 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 393000 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 2183000 | USD | 20240307 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 424000 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 1675000 | USD | 20231108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 557000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 1251000 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 694000 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 2276000 | USD | 20240307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 638000 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 1665000 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 523000 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 1027000 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 1530000 | USD | 20230309 | Open filing evidence |
Operating Segments · Bank Segment · Retirement Plan Consulting Fees
Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=fmnb:RetirementPlanConsultingFeesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 0 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20230309 | Open filing evidence |
Operating Segments · Bank Segment · Deposit Account
Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=us-gaap:DepositAccountMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 1583000 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 6322000 | USD | 20240307 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 1432000 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 4716000 | USD | 20240307 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 3660000 | USD | 20240307 | Open filing evidence |
Operating Segments · Bank Segment · Fiduciary And Trust
Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=us-gaap:FiduciaryAndTrustMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20230808 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 0 | USD | 20231108 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 0 | USD | 20230505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20221108 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20220804 | Open filing evidence |
Operating Segments · Trust Segment
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 4043000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 7959000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 3916000 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 14711000 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 3805000 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 10623000 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 3379000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 6818000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 3439000 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 12736000 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 3221000 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 9316000 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2968000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 6095000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 3127000 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 11514000 | USD | 20260305 | Open filing evidence |
Operating Segments · Trust Segment · Debit Card And Electronic Funds Transfer Fees
Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ProductOrServiceAxis=fmnb:DebitCardAndElectronicFundsTransferFeesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20240307 | Open filing evidence |
Operating Segments · Trust Segment · Investment Commissions
Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ProductOrServiceAxis=fmnb:InvestmentCommissionsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 0 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20240307 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20240307 | Open filing evidence |
Operating Segments · Trust Segment · Fiduciary And Trust
Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ProductOrServiceAxis=us-gaap:FiduciaryAndTrustMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 2793000 | USD | 20240509 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 10108000 | USD | 20240307 | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 2587000 | USD | 20240509 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 9638000 | USD | 20240307 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 9438000 | USD | 20240307 | Open filing evidence |
Insurance Agency Commissions · Bank Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=fmnb:InsuranceAgencyCommissionsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 1485000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 3168000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 1683000 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 6531000 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1395000 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 4964000 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1828000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 3569000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1741000 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 5472000 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1416000 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 4199000 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 1255000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 2783000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 1528000 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 5444000 | USD | 20260305 | Open filing evidence |
Insurance Agency Commissions · Trust Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=fmnb:InsuranceAgencyCommissionsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 0 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20260305 | Open filing evidence |
Investment Commissions · Bank Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=fmnb:InvestmentCommissionsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 1044000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 1915000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 871000 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 2614000 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 658000 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 1908000 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 721000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1250000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 529000 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 2007000 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 476000 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1386000 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 478000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 910000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 432000 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1978000 | USD | 20260305 | Open filing evidence |
Investment Commissions · Trust Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=fmnb:InvestmentCommissionsMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 0 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20260305 | Open filing evidence |
Retirement Plan Consulting Fees · Bank Segment · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=fmnb:RetirementPlanConsultingFeesMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20250306 | Open filing evidence |
Retirement Plan Consulting Fees · Trust Segment · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=fmnb:RetirementPlanConsultingFeesMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 2637000 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 677000 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1918000 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 330000 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 664000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 2467000 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 650000 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 1837000 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 382000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 689000 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 2567000 | USD | 20250306 | Open filing evidence |
Retirement Plan Consulting · Bank Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=fmnb:RetirementPlanConsultingMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 0 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20260305 | Open filing evidence |
Retirement Plan Consulting · Trust Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=fmnb:RetirementPlanConsultingMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 954000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 1840000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 886000 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 3650000 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1060000 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 2641000 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 783000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1581000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 798000 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 2637000 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 677000 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1918000 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 623000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1241000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 617000 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 2467000 | USD | 20260305 | Open filing evidence |
Debit Card · Bank Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=us-gaap:DebitCardMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 2561000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 4584000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 2023000 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 7907000 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 2068000 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 5951000 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 2017000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 3882000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1866000 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 7484000 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1993000 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 5320000 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 1760000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 3327000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 1567000 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 7059000 | USD | 20260305 | Open filing evidence |
Debit Card · Trust Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=us-gaap:DebitCardMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 0 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20260305 | Open filing evidence |
Deposit Account · Bank Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=us-gaap:DepositAccountMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 2434000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 4400000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 1966000 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 7212000 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1874000 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 5381000 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1749000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 3507000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1758000 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 7311000 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1992000 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 5421000 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 1846000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 3429000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 1583000 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 6322000 | USD | 20260305 | Open filing evidence |
Deposit Account · Bank Segment · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=us-gaap:DepositAccountMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 7311000 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1992000 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 5421000 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 1846000 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 3429000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 6322000 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 1712000 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 4646000 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 1501000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 2933000 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 4716000 | USD | 20250306 | Open filing evidence |
Deposit Account · Trust Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=us-gaap:DepositAccountMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 0 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20260305 | Open filing evidence |
Deposit Account · Trust Segment · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=us-gaap:DepositAccountMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20250306 | Open filing evidence |
Fiduciary And Trust · Bank Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=us-gaap:FiduciaryAndTrustMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 0 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20260305 | Open filing evidence |
Fiduciary And Trust · Trust Segment
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=us-gaap:FiduciaryAndTrustMember;us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 3089000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 6119000 | USD | 20260806 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 3030000 | USD | 20260507 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 11061000 | USD | 20260305 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 2745000 | USD | 20251106 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 7982000 | USD | 20251106 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 2596000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 5237000 | USD | 20260806 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 2641000 | USD | 20260507 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 10099000 | USD | 20260305 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 2544000 | USD | 20251106 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 7398000 | USD | 20251106 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2345000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 4854000 | USD | 20250807 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 2510000 | USD | 20250508 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 9047000 | USD | 20260305 | Open filing evidence |
Bank Segment · Operating Segments
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 222385000 | USD | 20250306 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 208677000 | USD | 20250306 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 140355000 | USD | 20250306 | Open filing evidence |
Bank Segment · Operating Segments · Debit Card And Electronic Funds Transfer Fees
Statement Business Segments · Consolidation Items · Product Or Service
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=fmnb:DebitCardAndElectronicFundsTransferFeesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 7484000 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1993000 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 5320000 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 1760000 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 3327000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 7059000 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 1763000 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 5362000 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 1810000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 3599000 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 5814000 | USD | 20250306 | Open filing evidence |
Bank Segment · Operating Segments · Investment Commissions
Statement Business Segments · Consolidation Items · Product Or Service
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=fmnb:InvestmentCommissionsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 2007000 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 476000 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1386000 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 478000 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 910000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1978000 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 520000 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 1389000 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 476000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 869000 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 2183000 | USD | 20250306 | Open filing evidence |
Bank Segment · Operating Segments · Fiduciary And Trust
Statement Business Segments · Consolidation Items · Product Or Service
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:FiduciaryAndTrustMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20250306 | Open filing evidence |
Bank Segment · Debit Card And Electronic Funds Transfer Fees · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=fmnb:DebitCardAndElectronicFundsTransferFeesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-03-31 | 1416000 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 5144000 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 1128000 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 3438000 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 1226000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 2310000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 1171000 Restated | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 4264000 Restated | USD | 20220309 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 1048000 | USD | 20211104 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 2866000 | USD | 20211104 | Open filing evidence |
Bank Segment · Insurance Agency Commissions · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=fmnb:InsuranceAgencyCommissionsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 5472000 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1416000 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 4199000 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 1255000 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 2783000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 5444000 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 1116000 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 3904000 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 1332000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 2788000 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 4402000 | USD | 20250306 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 1047000 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 3456000 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 799000 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 2748000 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 948000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 1949000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 1003000 Restated | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 3124000 | USD | 20220309 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 784000 | USD | 20211104 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 2348000 | USD | 20211104 | Open filing evidence |
Bank Segment · Investment Commissions · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=fmnb:InvestmentCommissionsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-03-31 | 694000 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 2276000 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 638000 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 1665000 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 523000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 1027000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 504000 | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 1530000 | USD | 20220309 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 353000 | USD | 20211104 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 1080000 | USD | 20211104 | Open filing evidence |
Bank Segment · Retirement Plan Consulting Fees · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=fmnb:RetirementPlanConsultingFeesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20220309 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 0 | USD | 20211104 | Open filing evidence |
Bank Segment · Deposit Account · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=us-gaap:DepositAccountMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-03-31 | 1145000 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 3660000 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 924000 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 2522000 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 790000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 1598000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 808000 | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 3682000 | USD | 20220309 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 904000 | USD | 20211104 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 2752000 | USD | 20211104 | Open filing evidence |
Bank Segment · Fiduciary And Trust · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=us-gaap:FiduciaryAndTrustMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20220309 | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 0 | USD | 20211104 | Open filing evidence |
Bank Segment · Financial Service Other · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:BankSegmentMember;srt:ProductOrServiceAxis=us-gaap:FinancialServiceOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-07-01 – 2020-09-30 | 4064000 | USD | 20201105 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 10616000 | USD | 20201105 | Open filing evidence |
Trust Segment · Operating Segments
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 12736000 | USD | 20250306 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 11514000 | USD | 20250306 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 11027000 | USD | 20250306 | Open filing evidence |
Trust Segment · Operating Segments · Debit Card And Electronic Funds Transfer Fees
Statement Business Segments · Consolidation Items · Product Or Service
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=fmnb:DebitCardAndElectronicFundsTransferFeesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20250306 | Open filing evidence |
Trust Segment · Operating Segments · Investment Commissions
Statement Business Segments · Consolidation Items · Product Or Service
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=fmnb:InvestmentCommissionsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20250306 | Open filing evidence |
Trust Segment · Operating Segments · Fiduciary And Trust
Statement Business Segments · Consolidation Items · Product Or Service
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:FiduciaryAndTrustMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 10099000 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 2544000 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 7398000 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2638000 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 5431000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 9047000 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 2327000 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 6665000 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 2248000 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 4835000 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 8460000 | USD | 20250306 | Open filing evidence |
Trust Segment · Debit Card And Electronic Funds Transfer Fees · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ProductOrServiceAxis=fmnb:DebitCardAndElectronicFundsTransferFeesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20220309 | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 0 | USD | 20211104 | Open filing evidence |
Trust Segment · Insurance Agency Commissions · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ProductOrServiceAxis=fmnb:InsuranceAgencyCommissionsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 0 | USD | 20241107 | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 0 | USD | 20240808 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 0 | USD | 20250306 | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20220309 | Open filing evidence |
Trust Segment · Investment Commissions · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ProductOrServiceAxis=fmnb:InvestmentCommissionsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20220309 | Open filing evidence |
Trust Segment · Retirement Plan Consulting Fees · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ProductOrServiceAxis=fmnb:RetirementPlanConsultingFeesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-03-31 | 397000 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 1421000 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 334000 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 1043000 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 389000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 709000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 320000 | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 1523000 | USD | 20220309 | Open filing evidence |
Trust Segment · Deposit Account · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ProductOrServiceAxis=us-gaap:DepositAccountMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 0 | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 20220309 | Open filing evidence |
Trust Segment · Fiduciary And Trust · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=fmnb:TrustSegmentMember;srt:ProductOrServiceAxis=us-gaap:FiduciaryAndTrustMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-03-31 | 2519000 | USD | 20220505 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 9438000 | USD | 20220309 | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 2335000 | USD | 20211104 | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 6929000 | USD | 20211104 | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 2358000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 4594000 | USD | 20210805 | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 2236000 | USD | 20220505 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 7632000 | USD | 20220309 | Open filing evidence |