XML 17 R1.htm IDEA: XBRL DOCUMENT v3.20.4
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Mar. 01, 2021
Jun. 30, 2020
Cover [Abstract]      
Entity Registrant Name Farmers National Banc Corp.    
Entity Central Index Key 0000709337    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Document Type 10-K    
Document Period End Date Dec. 31, 2020    
Amendment Flag false    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Title of 12(b) Security Common Stock, No Par Value    
Trading Symbol FMNB    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Common Stock, Shares Outstanding   28,312,557  
Entity Public Float     $ 334.2
Document Annual Report true    
Document Transition Report false    
Entity Shell Company false    
Entity File Number 001-35296    
Entity Tax Identification Number 34-1371693    
Entity Address, Address Line One 20 South Broad Street    
Entity Address, City or Town Canfield    
Entity Address, State or Province OH    
Entity Address, Postal Zip Code 44406    
City Area Code 330    
Local Phone Number 533-3341    
Entity Incorporation, State or Country Code OH    
ICFR Auditor Attestation Flag false    
Documents Incorporated by Reference

Document

  

Part of Form 10-K

into which
Document is Incorporated

Portions of the registrant’s definitive proxy statement for the 2021

  

III

Annual Meeting of Shareholders