Document and Entity Information	3 Months Ended
	Mar. 31, 2014	May 01, 2014
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q1
Trading Symbol	FCBC
Entity Registrant Name	FIRST COMMUNITY BANCSHARES INC /NV/
Entity Central Index Key	0000859070
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		18,392,020