Condensed Financial Information - Parent Corporation Only STATEMENTS OF OPERATIONS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
INCOME:
Interest and dividends from investments	$ 44,272	$ 47,023	$ 48,636
EXPENSES:
Salaries and employee benefits	30,627	30,417	27,373
Amortization	171	171	171
Interest expense	6,567	8,824	10,691
Other	9,300	8,602	7,354
Income before income taxes	8,094	9,956	6,012
Income tax (benefit)	1,931	1,966	1,350
Net income attributable to Middleburg Financial Corporation	6,154	6,486	4,960
Middleburg Financial Corporation [Member]
INCOME:
Dividends from subsidiaries	2,670	1,880	1,047
Interest and dividends from investments	0	0	5
Other income (loss)	41	37	(2)
Total income	2,711	1,917	1,050
EXPENSES:
Salaries and employee benefits	671	517	540
Amortization	171	171	171
Legal and professional fees	20	27	177
Directors fees	279	251	192
Interest expense	279	280	280
Other	190	245	221
Total expenses	1,610	1,491	1,581
Income before income taxes	1,101	426	(531)
Income tax (benefit)	(542)	(559)	(539)
Income before equity in undistributed income of subsidiaries	1,643	985	8
Equity in undistributed income of subsidiaries	4,511	5,501	4,952
Net income attributable to Middleburg Financial Corporation	$ 6,154	$ 6,486	$ 4,960