Condensed Financial Information - Parent Corporation Only - BALANCE SHEETS (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Balance Sheet Statements, Captions [Line Items]
Cash on deposit with subsidiary bank	$ 6,989	$ 5,489
Investment in subsidiaries	155	155
TOTAL ASSETS	1,272,643	1,294,863	$ 1,222,857
Subordinated notes	5,155	5,155
TOTAL LIABILITIES	1,145,964	1,171,309
Common stock	17,636	17,330
Capital surplus	45,688	44,155
Retained earnings	64,755	60,392
Accumulated other comprehensive income (loss), net	(1,400)	1,677	3,794	$ 232
TOTAL SHAREHOLDERS' EQUITY	126,679	123,554	$ 122,034	$ 115,073
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,272,643	1,294,863
Middleburg Financial Corporation [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash on deposit with subsidiary bank	2,154	1,403
Investment in subsidiaries	126,694	125,900
Other assets	3,199	1,686
TOTAL ASSETS	132,047	128,989
Subordinated notes	5,155	5,155
Other liabilities	213	280
TOTAL LIABILITIES	5,368	5,435
Common stock	17,636	17,330
Capital surplus	45,688	44,155
Retained earnings	64,755	60,392
Accumulated other comprehensive income (loss), net	(1,400)	1,677
TOTAL SHAREHOLDERS' EQUITY	126,679	123,554
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 132,047	$ 128,989