Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
INTEREST INCOME
Interest and fees on loans	$ 39,392	$ 40,548	$ 48,834
Interest and dividends on securities available for sale
Taxable	6,627	4,733	4,743
Tax-exempt	2,363	2,514	2,944
Dividends	144	105	88
Interest on deposits in banks and federal funds sold	110	131	137
Total interest and dividend income	48,636	48,031	56,746
INTEREST EXPENSE
Interest on deposits	8,867	12,033	15,614
Interest on securities sold under agreements to repurchase	293	205	40
Interest on short-term borrowings	318	393	592
Interest on FHLB borrowings and other debt	1,213	1,544	2,836
Total interest expense	10,691	14,175	19,082
NET INTEREST INCOME	37,945	33,856	37,664
Provision for loan losses	2,884	12,005	4,551
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	35,061	21,851	33,113
NONINTEREST INCOME
Service charges on deposit accounts	2,095	1,884	1,905
Trust and investment advisory fee income	3,636	3,335	3,218
Gains on loans held for sale	17,992	17,158	11,860
Gains on securities available for sale, net	460	866	2,070
Total other-than-temporary impairment losses	(27)	(901)	(2,224)
Portion of (gain) loss recognized in other comprehensive income	2	(202)	1,152
Net impairment losses	(25)	(1,103)	(1,072)
Commissions on investment sales	755	622	580
Fees on mortgages held for sale	333	1,881	1,044
Other service charges, commissions and fees	452	467	507
Bank-owned life insurance	486	503	489
Other operating income	226	390	311
Total noninterest income	26,410	26,003	20,912
NONINTEREST EXPENSE
Salaries and employees' benefits	33,821	29,594	28,042
Net occupancy and equipment expense	6,748	6,249	5,904
Advertising	1,399	1,071	760
Computer operations	1,501	1,324	1,290
Other real estate owned	2,564	2,468	3,794
Other taxes	812	798	587
Federal deposit insurance expense	1,260	1,907	2,051
Other operating expenses	7,354	9,331	6,434
Total noninterest expense	55,459	52,742	48,862
Income (loss) before income taxes	6,012	(4,888)	5,163
Income tax expense (benefit)	1,350	(2,562)	64
NET INCOME (LOSS)	4,662	(2,326)	5,099
Net (income) loss attributable to non- controlling interest	298	(362)	(1,577)
Net income (loss) attributable to Middleburg Financial Corporation	4,960	(2,688)	3,522
Amortization of discount on preferred stock	0	0	429
Dividends on preferred stock	0	0	987
Net income (loss) available to common shareholders	$ 4,960	$ (2,688)	$ 2,106
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.71	$ (0.39)	$ 0.37
Diluted (in dollars per share)	$ 0.71	$ (0.39)	$ 0.37