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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Accounting Policies [Line Items]    
Other real estate owned $ 179 $ 517
Allowance for credit losses 37,423 35,066
Total shareholders' equity attributable to SmartFinancial Inc. and Subsidiary 491,348 459,886
Accrued interest receivables for loans $ 14,200 $ 12,500
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Other Assets Other Assets
Allowance for off balance sheet credit $ 2,500 $ 2,400
Residential Real Estate [Member]    
Accounting Policies [Line Items]    
Other real estate owned   $ 279