Document and Entity Information - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Aug. 06, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Asset Types
Entity Registrant Name	F&M BANK CORP
Entity Central Index Key	0000740806
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding			3,173,741
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2019
[custom:GainOnSaleOfLoansHeldForSale]	$ 1,326	$ 1,105