Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Revenues:
Interest income	$ 10,352	$ 10,941	$ 21,051	$ 22,048
Trust and investment fee income	1,398	1,203	2,745	2,391
Other income	1,029	3,070	2,689	7,764
Total operating income	12,779	15,214	26,485	32,203
Expenses:
Interest expense	1,039	1,431	2,107	2,826
Salaries and employee benefits	4,973	5,993	9,821	13,026
Provision for (recovery of) loan losses	(425)	72	25	960
Other	4,097	5,138	8,148	10,241
Total operating expenses	9,684	12,634	20,101	27,053
Income before income taxes	3,095	2,580	6,384	5,150
Income tax expense	815	667	1,656	1,415
NET INCOME	2,280	1,913	4,728	3,735
Non-controlling interest in income of consolidated subsidiary	0	(58)	0	98
Net income attributable to Middleburg Financial Corporation	2,280	1,855	4,728	3,833
Total assets	1,241,985	1,252,735	1,241,985	1,252,735	$ 1,222,857
Capital expenditures	2,320	303	2,471	454
Goodwill and other intangibles	3,722	3,893	3,722	3,893	$ 3,807
Commercial & Retail Banking [Member]
Revenues:
Interest income	10,350	10,865	21,046	21,879
Trust and investment fee income	155	146	284	286
Other income	1,029	1,083	2,689	2,690
Total operating income	11,534	12,094	24,019	24,855
Expenses:
Interest expense	1,039	1,415	2,107	2,810
Salaries and employee benefits	4,367	4,168	8,681	8,119
Provision for (recovery of) loan losses	(425)	0	25	926
Other	3,850	4,334	7,661	8,092
Total operating expenses	8,831	9,917	18,474	19,947
Income before income taxes	2,703	2,177	5,545	4,908
Income tax expense	667	568	1,341	1,211
NET INCOME	2,036	1,609	4,204	3,697
Non-controlling interest in income of consolidated subsidiary	0	0	0	0
Net income attributable to Middleburg Financial Corporation	2,036	1,609	4,204	3,697
Total assets	1,238,148	1,365,914	1,238,148	1,365,914
Capital expenditures	2,320	298	2,471	441
Goodwill and other intangibles	0	0	0	0
Wealth Management [Member]
Revenues:
Interest income	2	3	5	7
Trust and investment fee income	1,284	1,095	2,543	2,181
Other income	0	0	0	0
Total operating income	1,286	1,098	2,548	2,188
Expenses:
Interest expense	0	0	0	0
Salaries and employee benefits	606	566	1,140	1,135
Provision for (recovery of) loan losses	0	0	0	0
Other	288	287	569	550
Total operating expenses	894	853	1,709	1,685
Income before income taxes	392	245	839	503
Income tax expense	148	99	315	204
NET INCOME	244	146	524	299
Non-controlling interest in income of consolidated subsidiary	0	0	0	0
Net income attributable to Middleburg Financial Corporation	244	146	524	299
Total assets	6,532	12,547	6,532	12,547
Capital expenditures	0	2	0	10
Goodwill and other intangibles	3,722	3,893	3,722	3,893
Mortgage Banking [Member]
Revenues:
Interest income	0	163	0	450
Trust and investment fee income	0	0	0	0
Other income	0	2,008	0	5,121
Total operating income	0	2,171	0	5,571
Expenses:
Interest expense	0	106	0	304
Salaries and employee benefits	0	1,259	0	3,772
Provision for (recovery of) loan losses	0	72	0	34
Other	0	576	0	1,722
Total operating expenses	0	2,013	0	5,832
Income before income taxes	0	158	0	(261)
Income tax expense	0	0	0	0
NET INCOME	0	158	0	(261)
Non-controlling interest in income of consolidated subsidiary	0	(58)	0	98
Net income attributable to Middleburg Financial Corporation	0	100	0	(163)
Total assets	0	0	0	0
Capital expenditures	0	3	0	3
Goodwill and other intangibles	0	0	0	0
Intercompany Eliminations [Member]
Revenues:
Interest income	0	(90)	0	(288)
Trust and investment fee income	(41)	(38)	(82)	(76)
Other income	0	(21)	0	(47)
Total operating income	(41)	(149)	(82)	(411)
Expenses:
Interest expense	0	(90)	0	(288)
Salaries and employee benefits	0	0	0	0
Provision for (recovery of) loan losses	0	0	0	0
Other	(41)	(59)	(82)	(123)
Total operating expenses	(41)	(149)	(82)	(411)
Income before income taxes	0	0	0	0
Income tax expense	0	0	0	0
NET INCOME	0	0	0	0
Non-controlling interest in income of consolidated subsidiary	0	0	0	0
Net income attributable to Middleburg Financial Corporation	0	0	0	0
Total assets	(2,695)	(125,726)	(2,695)	(125,726)
Capital expenditures	0	0	0	0
Goodwill and other intangibles	$ 0	$ 0	$ 0	$ 0