Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2022	Mar. 07, 2023	Jun. 30, 2022
Document Information [Line Items]
Entity Central Index Key	0000811808
Entity Registrant Name	SUMMIT FINANCIAL GROUP, INC.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2022
Entity File Number	0-16587
Entity Incorporation, State or Country Code	WV
Entity Tax Identification Number	55-0672148
Entity Address, Address Line One	300 N. Main Street
Entity Address, City or Town	Moorefield
Entity Address, State or Province	WV
Entity Address, Postal Zip Code	26836
City Area Code	304
Local Phone Number	530-1000
Title of 12(b) Security	Common
Trading Symbol	SMMF
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 305,343,000
Entity Common Stock, Shares Outstanding		12,784,168
Auditor Firm ID	613
Auditor Name	YOUNT, HYDE & BARBOUR, P.C.
Auditor Location	Winchester, Virginia