Condensed Financial Information - Parent Corporation Only BALANCE SHEETS (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Condensed Balance Sheet Statements, Captions [Line Items]
Cash on deposit with subsidiary bank	$ 6,648	$ 7,139
Investment securities available for sale	328,423	319,457
Investment in subsidiaries	155	155
TOTAL ASSETS	1,227,753	1,236,781	1,192,860
Trust-preferred capital notes	5,155	5,155
TOTAL LIABILITIES	1,112,680	1,119,659
Common stock	17,403	17,357
Capital surplus	44,251	43,869
Retained earnings	50,689	46,235
Accumulated other comprehensive income, net	232	6,467	3,926	(1,012)
TOTAL SHAREHOLDERS' EQUITY	115,073	117,122	108,013	99,993
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,227,753	1,236,781
Middleburg Financial Corporation [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash on deposit with subsidiary bank	638	353
Money market fund	8	7
Investment securities available for sale	44	33
Investment in subsidiaries	110,098	112,145
Goodwill	4,789	5,289
Intangible assets, net	557	728
Other assets	1,650	580
TOTAL ASSETS	117,784	119,135
Trust-preferred capital notes	5,155	5,155
Other liabilities	54	52
TOTAL LIABILITIES	5,209	5,207
Common stock	17,403	17,357
Capital surplus	44,251	43,869
Retained earnings	50,689	46,235
Accumulated other comprehensive income, net	232	6,467
TOTAL SHAREHOLDERS' EQUITY	112,575	113,928
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 117,784	$ 119,135