Capital Requirements (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Consolidated [Member]
Total Capital (to Risk- Weighted Assets), Amount [Abstract]
Actual	$ 139,419	$ 132,481
Minimum Capital Requirement	$ 62,436	$ 60,495
Total Capital (to Risk- Weighted Assets), Ratio [Abstract]
Actual, Ratio (in hundredths)	17.90%	17.50%
Minimum Capital Requirement, Ratio (in hundredths)	8.00%	8.00%
Tier 1 Capital (to Risk- Weighted Assets), Amount [Abstract]
Actual	$ 129,642	$ 123,008
Minimum Capital Requirement	$ 46,827	$ 45,371
Tier 1 Capital (to Risk- Weighted Assets), Ratio [Abstract]
Actual, Ratio (in hundredths)	16.60%	16.30%
Minimum Capital Requirement, Ratio (in hundredths)	6.00%	6.00%
Tier 1 Common Equity Capital (to Risk- Weighted Assets), Amount [Abstract]
Actual	$ 124,642	$ 118,008
Minimum Capital Requirement	$ 35,121	$ 34,028
Tier 1 Common Equity Capital (to Risk- Weighted Assets), Ratio [Abstract]
Actual, Ratio (in hundredths)	16.00%	15.60%
Minimum Capital Requirement, Ratio (in hundredths)	4.50%	4.50%
Tier 1 Capital (to Average Assets), Amount [Abstract]
Actual	$ 129,642	$ 123,008
Minimum Capital Requirement	$ 52,142	$ 51,301
Tier 1 Capital (to Average Assets), Ratio [Abstract]
Actual, Ratio (in hundredths)	10.00%	9.60%
Minimum Capital Requirement, Ratio (in hundredths)	4.00%	4.00%
Middleburg Bank [Member]
Total Capital (to Risk- Weighted Assets), Amount [Abstract]
Actual	$ 131,725	$ 127,418
Minimum Capital Requirement	61,994	60,055
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 77,492	$ 75,068
Total Capital (to Risk- Weighted Assets), Ratio [Abstract]
Actual, Ratio (in hundredths)	17.00%	17.00%
Minimum Capital Requirement, Ratio (in hundredths)	8.00%	8.00%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (in hundredths)	10.00%	10.00%
Tier 1 Capital (to Risk- Weighted Assets), Amount [Abstract]
Actual	$ 122,016	$ 118,013
Minimum Capital Requirement	46,495	45,041
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 61,994	$ 60,055
Tier 1 Capital (to Risk- Weighted Assets), Ratio [Abstract]
Actual, Ratio (in hundredths)	15.80%	15.70%
Minimum Capital Requirement, Ratio (in hundredths)	6.00%	6.00%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (in hundredths)	8.00%	8.00%
Tier 1 Common Equity Capital (to Risk- Weighted Assets), Amount [Abstract]
Actual	$ 122,016	$ 118,013
Minimum Capital Requirement	34,872	33,781
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 50,370	$ 48,794
Tier 1 Common Equity Capital (to Risk- Weighted Assets), Ratio [Abstract]
Actual, Ratio (in hundredths)	15.80%	15.70%
Minimum Capital Requirement, Ratio (in hundredths)	4.50%	4.50%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (in hundredths)	6.50%	6.50%
Tier 1 Capital (to Average Assets), Amount [Abstract]
Actual	$ 122,016	$ 118,013
Minimum Capital Requirement	51,909	51,067
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 64,886	$ 63,834
Tier 1 Capital (to Average Assets), Ratio [Abstract]
Actual, Ratio (in hundredths)	9.40%	9.20%
Minimum Capital Requirement, Ratio (in hundredths)	4.00%	4.00%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (in hundredths)	5.00%	5.00%