Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Nov. 07, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	MIDDLEBURG FINANCIAL CORP
Entity Central Index Key	0000914138
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		7,123,914
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2014