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Regulatory Matters (Regulatory Capital Levels) (Details) $ in Thousands | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
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SmartFinancial, Inc. [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital (to Risk-Weighted Assets), Actual Amount | $ 407,413 | $ 386,627
Tier 1 Capital (to Risk-Weighted Assets), Actual Amount | 343,502 | 325,345
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Amount | 343,502 | 325,345
Tier 1 Capital (to Average Assets), Actual Amount | $ 343,502 | $ 325,345
Total Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 11.80 | 12.55
Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 9.95 | 10.56
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 9.95% | 10.56%
Tier 1 Capital (to Average Assets), Actual Ratio (as a percent) | 7.48 | 7.45
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | $ 276,136 | $ 246,483
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | 207,102 | 184,862
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | 155,326 | 138,647
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Amount | $ 183,749 | $ 174,578
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) | 8.00 | 8.00
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) | 6.00 | 6.00
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) | 4.50% | 4.50%
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Ratio (as a percent) | 4.00 | 4.00
Smart Bank [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital (to Risk-Weighted Assets), Actual Amount | $ 404,412 | $ 378,055
Tier 1 Capital (to Risk-Weighted Assets), Actual Amount | 382,474 | 358,703
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Amount | 382,474 | 358,703
Tier 1 Capital (to Average Assets), Actual Amount | $ 382,474 | $ 358,703
Total Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 11.72 | 12.29
Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 11.08 | 11.66
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 11.08% | 11.66%
Tier 1 Capital (to Average Assets), Actual Ratio (as a percent) | 8.33 | 8.23
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | $ 276,138 | $ 246,053
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | 207,104 | 184,539
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | 155,328 | 138,405
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Amount | $ 183,745 | $ 174,384
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) | 8.00 | 8.00
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) | 6.00 | 6.00
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent) | 4.50% | 4.50%
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Ratio (as a percent) | 4.00 | 4.00
Total Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Amount | $ 345,173 | $ 307,566
Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Amount | 276,138 | 246,053
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Amount | 224,362 | 199,918
Tier 1 Capital (to Average Assets), Minimum to be well capitalized under prompt corrective action provisions Amount | $ 229,682 | $ 217,980
Total Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent) | 10.00 | 10.00
Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent) | 8.00 | 8.00
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent) | 6.50% | 6.50%
Tier 1 Capital (to Average Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent) | 5.00 | 5.00

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