Condensed Financial Information - Parent Corporation Only - STATEMENTS OF INCOME (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
INCOME:
Interest and dividends from investments	$ 43,375	$ 42,281	$ 43,325
EXPENSES:
Salaries and employee benefits	18,757	18,435	22,601
Legal and advisory fees	1,202	1,029	1,324
Interest expense	4,424	4,207	5,243
Other	4,190	4,091	4,776
Income before income taxes	10,877	10,545	9,827
Income tax benefit	2,813	2,715	2,341
Net income attributable to Middleburg Financial Corporation	8,064	7,830	7,584
Middleburg Financial Corporation [Member]
INCOME:
Dividends from subsidiaries	6,870	5,383	3,440
Interest and dividends from investments	0	0	15
Other income	2	17	0
Total income	6,872	5,400	3,455
EXPENSES:
Salaries and employee benefits	1,240	919	746
Legal and advisory fees	1,506	164	91
Directors fees	352	274	280
Interest expense	280	279	279
Other	426	416	366
Total expenses	3,804	2,052	1,762
Income before income taxes	3,068	3,348	1,693
Income tax benefit	(1,081)	(715)	(753)
Income before equity in undistributed income of subsidiaries	4,149	4,063	2,446
Equity in undistributed income of subsidiaries	3,915	3,767	5,138
Net income attributable to Middleburg Financial Corporation	$ 8,064	$ 7,830	$ 7,584