Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2025	Apr. 30, 2025
Document and Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2025
Document Transition Report	false
Securities Act File Number	0-14237
Entity Registrant Name	First United Corporation
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	52-1380770
Entity Address, Address Line One	19 South Second Street
Entity Address, City or Town	Oakland
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	21550-0009
City Area Code	800
Local Phone Number	470-4356
Title of 12(b) Security	Common Stock
Trading Symbol	FUNC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		6,478,634
Entity Central Index Key	0000763907
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q1
Amendment Flag	false