XML 77 R57.htm IDEA: XBRL DOCUMENT v3.7.0.1

Business Combinations (Details 2) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Business Combinations [Abstract]
Net interest income	$ 68,120	$ 62,524
Net income	$ 20,557	$ 12,750
Basic and diluted earnings per share	$ 0.76	$ 0.47

X

- Definition

Business acquisition pro forma earnings per share basic and diluted.

+ References

No definition available.

+ Details

Name:	fmnb_BusinessAcquisitionProFormaEarningsPerShareBasicAndDiluted
Namespace Prefix:	fmnb_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Business acquisitions pro forma interest income expense net.

+ References

No definition available.

+ Details

Name:	fmnb_BusinessAcquisitionsProFormaInterestIncomeExpenseNet
Namespace Prefix:	fmnb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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