Document And Entity Information
Mar. 29, 2022
Document Information [Line Items]  
Entity, Registrant Name FIRST COMMUNITY BANKSHARES, INC.
Document, Type 8-K
Document, Period End Date Mar. 29, 2022
Entity, Incorporation, State or Country Code VA
Entity, File Number 000-19297
Entity, Tax Identification Number 55-0694814
Entity, Address, Address Line One P.O. Box 989
Entity, Address, City or Town Bluefield
Entity, Address, State or Province VA
Entity, Address, Postal Zip Code 24605-0989
City Area Code 276
Local Phone Number 326-9000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock
Trading Symbol FCBC
Security Exchange Name NASDAQ
Entity, Emerging Growth Company false
Amendment Flag false
Entity, Central Index Key 0000859070