Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2012	Mar. 11, 2013	Jun. 29, 2012
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2012
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2012
Entity Registrant Name	SUSSEX BANCORP
Entity Central Index Key	0001028954
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Trading Symbol	sbbx
Entity Common Stock, Shares Outstanding		3,423,713
Entity Well-known Seasoned Issuer	No
Entity Public Float			$ 14,449,062
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No