XML 70 R59.htm IDEA: XBRL DOCUMENT v3.8.0.1

Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) Loan	Sep. 30, 2016 USD ($) Loan	Sep. 30, 2017 USD ($) Loan	Sep. 30, 2016 USD ($) Loan
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	13	10	46	32
Pre-Modification Outstanding Recorded Investment	$ 373	$ 158	$ 1,027	$ 608
Post-Modification Outstanding Recorded Investment	$ 373	$ 158	$ 1,030	$ 609
Originated Loans
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	12	8	41	27
Pre-Modification Outstanding Recorded Investment	$ 347	$ 134	$ 891	$ 483
Post-Modification Outstanding Recorded Investment	$ 347	$ 134	$ 894	$ 484
Originated Loans | Residential real estate, 1-4 family residential
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	3	1	10	7
Pre-Modification Outstanding Recorded Investment	$ 235	$ 93	$ 535	$ 328
Post-Modification Outstanding Recorded Investment	$ 235	$ 93	$ 538	$ 329
Originated Loans | Residential real estate, Home equity lines of credit
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	1		9
Pre-Modification Outstanding Recorded Investment	$ 61		$ 225
Post-Modification Outstanding Recorded Investment	$ 61		$ 225
Originated Loans | Consumer, Indirect
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	8	7	22	20
Pre-Modification Outstanding Recorded Investment	$ 51	$ 41	$ 131	$ 155
Post-Modification Outstanding Recorded Investment	$ 51	$ 41	$ 131	$ 155
Acquired Loans
Financing Receivable Modifications [Line Items]
Number of Loans | Loan		2	5	5
Pre-Modification Outstanding Recorded Investment		$ 24	$ 136	$ 125
Post-Modification Outstanding Recorded Investment		$ 24	$ 136	$ 125
Acquired Loans | Residential real estate, 1-4 family residential
Financing Receivable Modifications [Line Items]
Number of Loans | Loan			2	2
Pre-Modification Outstanding Recorded Investment			$ 24	$ 68
Post-Modification Outstanding Recorded Investment			$ 24	$ 68
Acquired Loans | Residential real estate, Home equity lines of credit
Financing Receivable Modifications [Line Items]
Number of Loans | Loan		1	1	1
Pre-Modification Outstanding Recorded Investment		$ 18	$ 57	$ 18
Post-Modification Outstanding Recorded Investment		$ 18	$ 57	$ 18
Acquired Loans | Consumer
Financing Receivable Modifications [Line Items]
Number of Loans | Loan	1	1	2	2
Pre-Modification Outstanding Recorded Investment	$ 26	$ 6	$ 55	$ 39
Post-Modification Outstanding Recorded Investment	$ 26	$ 6	$ 55	$ 39

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=84173941&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=84173941&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=84173941&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_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:

X

- Details

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