Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Revenues:
Interest income	$ 10,941	$ 10,992	$ 22,048	$ 22,204
Trust and investment fee income	1,203	1,124	2,391	2,178
Other income	3,070	5,956	7,764	10,830
Total operating income	15,214	18,072	32,203	35,212
Expenses:
Interest expense	1,431	1,651	2,826	3,428
Salaries and employee benefits	5,993	7,692	13,026	15,492
Provision for loan losses	72	184	960	(4)
Other	5,138	5,416	10,241	11,544
Total operating expenses	12,634	14,943	27,053	30,460
Income before income taxes	2,580	3,129	5,150	4,752
Income tax expense	667	774	1,415	1,137
NET INCOME	1,913	2,355	3,735	3,615
Non-controlling interest in income of consolidated subsidiary	(58)	(262)	98	(195)
Net income attributable to Middleburg Financial Corporation	1,855	2,093	3,833	3,420
Total assets	1,252,735	1,217,200	1,252,735	1,217,200	1,227,753
Capital expenditures	303	212	454	460
Goodwill and other intangibles	3,893	5,932	3,893	5,932	5,346
Commercial & Retail Banking [Member]
Revenues:
Interest income	10,865	10,903	21,879	21,992
Trust and investment fee income	146	110	286	204
Other income	1,083	1,342	2,690	2,260
Total operating income	12,094	12,355	24,855	24,456
Expenses:
Interest expense	1,415	1,634	2,810	3,382
Salaries and employee benefits	4,168	4,198	8,119	8,474
Provision for loan losses	0	180	926	(9)
Other	4,334	4,056	8,092	8,690
Total operating expenses	9,917	10,068	19,947	20,537
Income before income taxes	2,177	2,287	4,908	3,919
Income tax expense	568	672	1,211	963
NET INCOME	1,609	1,615	3,697	2,956
Non-controlling interest in income of consolidated subsidiary	0		0	0
Net income attributable to Middleburg Financial Corporation	1,609	1,615	3,697	2,956
Total assets	1,365,914	1,203,277	1,365,914	1,203,277
Capital expenditures	298	203	441	451
Goodwill and other intangibles	0	0	0	0
Wealth Management [Member]
Revenues:
Interest income	3	4	7	7
Trust and investment fee income	1,095	1,051	2,181	2,052
Other income	0	0	0	0
Total operating income	1,098	1,055	2,188	2,059
Expenses:
Interest expense	0	0	0	0
Salaries and employee benefits	566	531	1,135	1,058
Provision for loan losses	0	0	0	0
Other	287	378	550	687
Total operating expenses	853	909	1,685	1,745
Income before income taxes	245	146	503	314
Income tax expense	99	102	204	174
NET INCOME	146	44	299	140
Non-controlling interest in income of consolidated subsidiary	0		0	0
Net income attributable to Middleburg Financial Corporation	146	44	299	140
Total assets	12,547	6,355	12,547	6,355
Capital expenditures	2	0	10	0
Goodwill and other intangibles	3,893	4,065	3,893	4,065
Mortgage Banking [Member]
Revenues:
Interest income	163	409	450	878
Trust and investment fee income	0	0	0	0
Other income	2,008	4,691	5,121	8,803
Total operating income	2,171	5,100	5,571	9,681
Expenses:
Interest expense	106	341	304	719
Salaries and employee benefits	1,259	2,963	3,772	5,960
Provision for loan losses	72	4	34	5
Other	576	1,096	1,722	2,478
Total operating expenses	2,013	4,404	5,832	9,162
Income before income taxes	158	696	(261)	519
Income tax expense	0	0	0	0
NET INCOME	158	696	(261)	519
Non-controlling interest in income of consolidated subsidiary	(58)	(262)	98	(195)
Net income attributable to Middleburg Financial Corporation	100	434	(163)	324
Total assets	0	75,257	0	75,257
Capital expenditures	3	9	3	9
Goodwill and other intangibles	0	1,867	0	1,867
Intercompany Eliminations [Member]
Revenues:
Interest income	(90)	(324)	(288)	(673)
Trust and investment fee income	(38)	(37)	(76)	(78)
Other income	(21)	(77)	(47)	(233)
Total operating income	(149)	(438)	(411)	(984)
Expenses:
Interest expense	(90)	(324)	(288)	(673)
Salaries and employee benefits	0	0	0	0
Provision for loan losses	0	0	0	0
Other	(59)	(114)	(123)	(311)
Total operating expenses	(149)	(438)	(411)	(984)
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
Net income attributable to Middleburg Financial Corporation	0	0	0	0
Total assets	(125,726)	(67,689)	(125,726)	(67,689)
Capital expenditures	0	0	0	0
Goodwill and other intangibles	$ 0	$ 0	$ 0	$ 0