XML 69 R58.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Troubled Debt Restructurings (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 USD ($) Loan | Mar. 31, 2016 USD ($) Loan
Financing Receivable Modifications [Line Items] |  |
Number of Loans | Loan | 16 | 12
Pre-Modification Outstanding Recorded Investment | $ 451 | $ 157
Post-Modification Outstanding Recorded Investment | $ 454 | $ 158
Originated Loans |  |
Financing Receivable Modifications [Line Items] |  |
Number of Loans | Loan | 15 | 11
Pre-Modification Outstanding Recorded Investment | $ 394 | $ 124
Post-Modification Outstanding Recorded Investment | $ 397 | $ 125
Originated Loans | Consumer |  |
Financing Receivable Modifications [Line Items] |  |
Number of Loans | Loan |  | 0
Pre-Modification Outstanding Recorded Investment |  | $ 0
Post-Modification Outstanding Recorded Investment |  | $ 0
Originated Loans | Residential real estate, 1-4 family residential |  |
Financing Receivable Modifications [Line Items] |  |
Number of Loans | Loan | 6 | 3
Pre-Modification Outstanding Recorded Investment | $ 284 | $ 47
Post-Modification Outstanding Recorded Investment | $ 287 | $ 48
Originated Loans | Residential real estate, Home equity lines of credit |  |
Financing Receivable Modifications [Line Items] |  |
Number of Loans | Loan | 5 |
Pre-Modification Outstanding Recorded Investment | $ 94 |
Post-Modification Outstanding Recorded Investment | $ 94 |
Originated Loans | Consumer, Indirect |  |
Financing Receivable Modifications [Line Items] |  |
Number of Loans | Loan | 4 | 8
Pre-Modification Outstanding Recorded Investment | $ 16 | $ 77
Post-Modification Outstanding Recorded Investment | $ 16 | $ 77
Acquired Loans |  |
Financing Receivable Modifications [Line Items] |  |
Number of Loans | Loan | 1 | 1
Pre-Modification Outstanding Recorded Investment | $ 57 | $ 33
Post-Modification Outstanding Recorded Investment | $ 57 | $ 33
Acquired Loans | Consumer |  |
Financing Receivable Modifications [Line Items] |  |
Number of Loans | Loan |  | 1
Pre-Modification Outstanding Recorded Investment |  | $ 33
Post-Modification Outstanding Recorded Investment |  | $ 33
Acquired Loans | Residential real estate, Home equity lines of credit |  |
Financing Receivable Modifications [Line Items] |  |
Number of Loans | Loan | 1 |
Pre-Modification Outstanding Recorded Investment | $ 57 |
Post-Modification Outstanding Recorded Investment | $ 57 |

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 No definition available. + Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Pre-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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_ConsumerPortfolioSegmentMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fmnb_ConsumerIndirectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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