Document And Entity Information	6 Months Ended
	Jun. 30, 2013	Aug. 02, 2013
Impaired Financing Receivable With Related Allowance Related Allowance
Entity Registrant Name	SUMMIT FINANCIAL GROUP INC
Entity Central Index Key	0000811808
Document Type	10-Q
Amendment Flag	false
Entity Filer Category	Smaller Reporting Company
Current Fiscal Year End Date	--12-31
Document Period End Date	Jun. 30, 2013
Entity Common Stock, Shares Outstanding		7,443,422
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2013