XML 80 R64.htm IDEA: XBRL DOCUMENT v3.10.0.1

Securities Available for Sale (Details 3) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	$ 37,766	$ 79,328
Unrealized Losses, Less Than 12 Months	(322)	(679)
Fair Value, 12 Months or Longer	222,033	111,378
Unrealized Losses, 12 Months or Longer	(6,995)	(2,818)
Fair Value, Total	259,799	190,706
Unrealized Losses, Total	(7,317)	(3,497)
Corporate bonds
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	516	397
Unrealized Losses, Less Than 12 Months	(4)	(3)
Fair Value, 12 Months or Longer	672	383
Unrealized Losses, 12 Months or Longer	(14)	(5)
Fair Value, Total	1,188	780
Unrealized Losses, Total	(18)	(8)
Small Business Administration
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	11	0
Unrealized Losses, Less Than 12 Months	0	0
Fair Value, 12 Months or Longer	11,919	14,182
Unrealized Losses, 12 Months or Longer	(362)	(396)
Fair Value, Total	11,930	14,182
Unrealized Losses, Total	(362)	(396)
U.S. Treasury and U.S. government sponsored entities
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	648	3,970
Unrealized Losses, Less Than 12 Months	(2)	(34)
Fair Value, 12 Months or Longer	5,065	1,912
Unrealized Losses, 12 Months or Longer	(100)	(35)
Fair Value, Total	5,713	5,882
Unrealized Losses, Total	(102)	(69)
State and political subdivisions
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	23,569	33,188
Unrealized Losses, Less Than 12 Months	(201)	(220)
Fair Value, 12 Months or Longer	64,174	25,721
Unrealized Losses, 12 Months or Longer	(1,692)	(423)
Fair Value, Total	87,743	58,909
Unrealized Losses, Total	(1,893)	(643)
Mortgage-backed securities - residential
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	13,002	40,072
Unrealized Losses, Less Than 12 Months	(114)	(400)
Fair Value, 12 Months or Longer	126,200	53,760
Unrealized Losses, 12 Months or Longer	(4,053)	(1,204)
Fair Value, Total	139,202	93,832
Unrealized Losses, Total	(4,167)	(1,604)
Collateralized mortgage obligations
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	20	1,701
Unrealized Losses, Less Than 12 Months	(1)	(22)
Fair Value, 12 Months or Longer	14,003	15,420
Unrealized Losses, 12 Months or Longer	(774)	(755)
Fair Value, Total	14,023	17,121
Unrealized Losses, Total	$ (775)	$ (777)

X

- References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=fmnb_SmallBusinessAdministrationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CollateralizedMortgageObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: