Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements of Comprehensive Income (Loss) Unaudited [Abstract]
Net income	$ 2,190	$ 1,078	$ 3,423	$ 2,075
Other comprehensive income, net of tax:
Unrealized holding gains arising during the period (net of tax of $389, $1,828, $748 and $2,093 respectively for the periods presented)	756	3,549	1,451	4,063
Reclassification adjustment for gains included in net income (net of tax of $50, $30, $98, and $42 respectively for the periods presented)	(98)	(57)	(190)	(80)
Unrealized losses on securities for which other-than-temporary impairment has been recognized in earnings (net of tax)	0	0	0	1
Unrealized gain on interest rate swap (net of tax of $72, $$54, $45, and $33 respectively for the periods presented)	(140)	(104)	(87)	(64)
Total other comprehensive income	518	3,388	1,174	3,920
Total comprehensive income	2,708	4,466	4,597	5,995
Comprehensive loss attributable to non-controlling interest	(421)	121	(72)	351
Comprehensive income attributable to Middleburg Financial Corporation	$ 2,287	$ 4,587	$ 4,525	$ 6,346