v3.26.1
Regulatory Matters (Regulatory Capital Levels) (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
SmartFinancial, Inc.    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total Capital (to Risk-Weighted Assets), Actual Amount $ 606,158 $ 470,635
Tier 1 Capital (to Risk-Weighted Assets), Actual Amount 468,641 413,616
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Amount 468,641 413,616
Tier 1 Capital (to Average Assets), Actual Amount $ 468,641 $ 413,616
Total Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) 0.1271 0.111
Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) 0.0983 0.0976
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Ration (as percent) 0.0983 0.0976
Tier 1 Capital (to Average Assets), Actual Ratio (as a percent) 0.083 0.0829
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount $ 381,470 $ 339,044
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount 286,103 254,283
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount 214,577 190,712
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Amount $ 225,852 $ 199,585
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) 0.08 0.08
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) 0.06 0.06
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) 0.045 0.045
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Ratio (as a percent) 0.04 0.04
Smart Bank    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total Capital (to Risk-Weighted Assets), Actual Amount $ 586,675 $ 478,368
Tier 1 Capital (to Risk-Weighted Assets), Actual Amount 547,820 445,159
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Amount 547,820 445,159
Tier 1 Capital (to Average Assets), Actual Amount $ 547,820 $ 445,159
Total Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) 0.1232 0.113
Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) 0.1151 0.1051
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Ration (as percent) 0.1151 0.1051
Tier 1 Capital (to Average Assets), Actual Ratio (as a percent) 0.0971 0.0894
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount $ 380,891 $ 338,774
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount 285,668 254,080
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount 214,251 190,560
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Amount $ 225,566 $ 199,214
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) 0.08 0.08
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) 0.06 0.06
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) 0.045 0.045
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Ratio (as a percent) 0.04 0.04
Total Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Amount $ 476,114 $ 423,467
Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Amount 380,891 338,774
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Amount 309,474 275,253
Tier 1 Capital (to Average Assets), Minimum to be well capitalized under prompt corrective action provisions Amount $ 281,957 $ 249,017
Total Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent) 0.10 0.10
Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent) 0.08 0.08
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent) 0.065 0.065
Tier 1 Capital (to Average Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent) 0.05 0.05