Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 segment	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting [Abstract]
Number of reportable segments	3
Revenues:
Interest income	$ 11,106	$ 11,212
Trust services income	1,048	960
Other income	4,833	4,968
Total operating income	16,987	17,140
Expenses:
Interest expense	1,395	1,777
Salaries and employee benefits	7,033	7,799
Provision for (recovery of) loan losses	888	(188)
Other expense	5,102	6,129
Total operating expenses	14,418	15,517
Income before income taxes	2,569	1,623
Income tax expense	749	363
NET INCOME	1,820	1,260
Non-controlling interest in consolidated subsidiary	157	67
Net income attributable to Middleburg Financial Corporation	1,977	1,327
Total assets	1,208,412	1,213,756	1,227,753
Capital expenditures	154	248
Goodwill and other intangibles	5,303	5,975	5,346
Commercial & Retail Banking [Member]
Revenues:
Interest income	11,013	11,089
Trust services income	0	0
Other income	1,746	1,012
Total operating income	12,759	12,101
Expenses:
Interest expense	1,395	1,748
Salaries and employee benefits	3,951	4,275
Provision for (recovery of) loan losses	926	(189)
Other expense	3,757	4,635
Total operating expenses	10,029	10,469
Income before income taxes	2,730	1,632
Income tax expense	644	291
NET INCOME	2,086	1,341
Non-controlling interest in consolidated subsidiary	0	0
Net income attributable to Middleburg Financial Corporation	2,086	1,341
Total assets	1,204,499	1,208,288
Capital expenditures	143	248
Goodwill and other intangibles	0	0
Wealth Management [Member]
Revenues:
Interest income	4	3
Trust services income	1,086	1,001
Other income	0	0
Total operating income	1,090	1,004
Expenses:
Interest expense	0	0
Salaries and employee benefits	569	527
Provision for (recovery of) loan losses	0	0
Other expense	263	309
Total operating expenses	832	836
Income before income taxes	258	168
Income tax expense	105	72
NET INCOME	153	96
Non-controlling interest in consolidated subsidiary	0	0
Net income attributable to Middleburg Financial Corporation	153	96
Total assets	6,458	6,232
Capital expenditures	8	0
Goodwill and other intangibles	3,936	4,108
Mortgage Banking [Member]
Revenues:
Interest income	287	469
Trust services income	0	0
Other income	3,113	4,112
Total operating income	3,400	4,581
Expenses:
Interest expense	198	378
Salaries and employee benefits	2,513	2,997
Provision for (recovery of) loan losses	(38)	1
Other expense	1,146	1,382
Total operating expenses	3,819	4,758
Income before income taxes	(419)	(177)
Income tax expense	0	0
NET INCOME	(419)	(177)
Non-controlling interest in consolidated subsidiary	157	67
Net income attributable to Middleburg Financial Corporation	(262)	(110)
Total assets	40,284	59,623
Capital expenditures	3	0
Goodwill and other intangibles	1,367	1,867
Intercompany Eliminations [Member]
Revenues:
Interest income	(198)	(349)
Trust services income	(38)	(41)
Other income	(26)	(156)
Total operating income	(262)	(546)
Expenses:
Interest expense	(198)	(349)
Salaries and employee benefits	0	0
Provision for (recovery of) loan losses	0	0
Other expense	(64)	(197)
Total operating expenses	(262)	(546)
Income before income taxes	0	0
Income tax expense	0	0
NET INCOME	0	0
Non-controlling interest in consolidated subsidiary	0	0
Net income attributable to Middleburg Financial Corporation	0	0
Total assets	(42,829)	(60,387)
Capital expenditures	0	0
Goodwill and other intangibles	$ 0	$ 0