v3.26.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2026
May 08, 2026
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Securities Act File Number 001-37661  
Entity Registrant Name SMARTFINANCIAL INC.  
Entity Incorporation, State or Country Code TN  
Entity Tax Identification Number 62-1173944  
Entity Address, Address Line One 5401 Kingston Pike, Suite 600  
Entity Address, City or Town Knoxville  
Entity Address, State or Province TN  
Entity Address, Postal Zip Code 37919  
City Area Code 865  
Local Phone Number 437-5700  
Title of 12(b) Security Common Stock, par value $1.00  
Trading Symbol SMBK  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   17,098,473
Entity Central Index Key 0001038773  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false