Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statements of Comprehensive Income (Loss) Unaudited [Abstract]
Net income	$ 1,233	$ 997
Other comprehensive income, net of tax:
Unrealized holding gains arising during the period (net of tax of $358 for 2012 and $265 for 2011)	695	514
Reclassification adjustment for gains included in net income (net of tax of $48 for 2012 and $12 for 2011)	(92)	(23)
Unrealized losses on securities for which other-than-temporary impairment has been recognized in earnings (net of tax of $0 for 2011)	0	1
Unrealized gain on interest rate swap (net of tax of $27 for 2012 and $20 for 2011)	53	40
Total other comprehensive income	656	532
Total comprehensive income	1,889	1,529
Comprehensive loss attributable to non-controlling interest	349	230
Comprehensive income attributable to Middleburg Financial Corporation	$ 2,238	$ 1,759