Segment Reporting (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Interest income	$ 43,375	$ 42,281	$ 43,325
Trust services income	4,643	4,785	4,362
Other income	6,095	5,605	10,424
Total operating income	54,113	52,671	58,111
Expenses:
Interest expense	4,424	4,207	5,243
Salaries and employee benefits	18,757	18,435	22,601
Provision for loan losses	1,853	2,293	1,960
Other expense	18,202	17,191	18,480
Total operating expenses	43,236	42,126	48,284
Income before income taxes	10,877	10,545	9,827
Income tax expense	2,813	2,715	2,341
NET INCOME	8,064	7,830	7,486
Non-controlling interest in consolidated subsidiary	0	0	98
Net income attributable to Middleburg Financial Corporation	8,064	7,830	7,584
Total assets	1,272,643	1,294,863	1,222,857
Capital expenditures	978	2,137	920
Goodwill and other intangibles	3,465	3,636	3,807
Operating Segments [Member] | Commercial & Retail Banking [Member]
Revenues:
Interest income	43,365	42,270	43,149
Trust services income	0	0	0
Other income	6,204	5,605	5,349
Total operating income	49,569	47,875	48,498
Expenses:
Interest expense	4,424	4,207	5,227
Salaries and employee benefits	16,473	16,130	16,567
Provision for loan losses	1,853	2,293	1,926
Other expense	17,556	16,237	15,818
Total operating expenses	40,306	38,867	39,538
Income before income taxes	9,263	9,008	8,960
Income tax expense	2,203	2,131	1,894
NET INCOME	7,060		7,066
Non-controlling interest in consolidated subsidiary			0
Net income attributable to Middleburg Financial Corporation		6,877	7,066
Total assets	1,270,222	1,291,708	1,218,452
Capital expenditures	978	2,137	911
Goodwill and other intangibles	0	0	0
Operating Segments [Member] | Wealth Management [Member]
Revenues:
Interest income	10	11	14
Trust services income	4,806	4,951	4,516
Other income	0	0	0
Total operating income	4,816	4,962	4,530
Expenses:
Interest expense	0	0	0
Salaries and employee benefits	2,284	2,305	2,262
Provision for loan losses	0	0	0
Other expense	918	1,120	1,140
Total operating expenses	3,202	3,425	3,402
Income before income taxes	1,614	1,537	1,128
Income tax expense	610	584	447
NET INCOME	1,004		681
Non-controlling interest in consolidated subsidiary			0
Net income attributable to Middleburg Financial Corporation		953	681
Total assets	6,693	6,700	7,152
Capital expenditures	0	0	6
Goodwill and other intangibles	3,465	3,636	3,807
Operating Segments [Member] | Mortgage Banking [Member]
Revenues:
Interest income	0	0	450
Trust services income	0	0	0
Other income	0	0	5,121
Total operating income	0	0	5,571
Expenses:
Interest expense	0	0	304
Salaries and employee benefits	0	0	3,772
Provision for loan losses	0	0	34
Other expense	0	0	1,722
Total operating expenses	0	0	5,832
Income before income taxes	0	0	(261)
Income tax expense	0	0	0
NET INCOME	0		(261)
Non-controlling interest in consolidated subsidiary			98
Net income attributable to Middleburg Financial Corporation		0	(163)
Total assets	0	0	0
Capital expenditures	0	0	3
Goodwill and other intangibles	0	0	0
Intercompany Eliminations [Member]
Revenues:
Interest income	0	0	(288)
Trust services income	(163)	(166)	(154)
Other income	(109)	0	(46)
Total operating income	(272)	(166)	(488)
Expenses:
Interest expense	0	0	(288)
Salaries and employee benefits	0	0	0
Provision for loan losses	0	0	0
Other expense	(272)	(166)	(200)
Total operating expenses	(272)	(166)	(488)
Income before income taxes	0	0	0
Income tax expense	0	0	0
NET INCOME	0		0
Non-controlling interest in consolidated subsidiary			0
Net income attributable to Middleburg Financial Corporation		0	0
Total assets	(4,272)	(3,545)	(2,747)
Capital expenditures	0	0	0
Goodwill and other intangibles	$ 0	$ 0	$ 0