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Regulatory Matters (Regulatory Capital Levels) (Details) $ in Thousands | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
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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 | $ 386,627 | $ 329,431
Tier 1 Capital (to Risk-Weighted Assets), Actual Amount | 325,345 | 271,739
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Amount | 325,345 | 271,739
Tier 1 Capital (to Average Assets), Actual Amount | $ 325,345 | $ 271,739
Total Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 12.55 | 14.07
Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 10.56 | 11.61
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 10.56% | 11.61%
Tier 1 Capital (to Average Assets), Actual Ratio (as a percent) | 7.45 | 8.70
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | $ 246,483 | $ 187,303
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | 184,862 | 140,477
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | 138,647 | 105,358
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Amount | $ 174,578 | $ 125,002
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 | $ 378,055 | $ 317,660
Tier 1 Capital (to Risk-Weighted Assets), Actual Amount | 358,703 | 299,314
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Amount | 358,703 | 299,314
Tier 1 Capital (to Average Assets), Actual Amount | $ 358,703 | $ 299,314
Total Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 12.29 | 13.57
Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 11.66 | 12.78
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent) | 11.66% | 12.78%
Tier 1 Capital (to Average Assets), Actual Ratio (as a percent) | 8.23 | 9.58
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | $ 246,053 | $ 187,294
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | 184,539 | 140,470
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount | 138,405 | 105,353
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Amount | $ 174,384 | $ 124,969
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 | $ 307,566 | $ 234,117
Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Amount | 246,053 | 187,294
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Amount | 199,918 | 152,176
Tier 1 Capital (to Average Assets), Minimum to be well capitalized under prompt corrective action provisions Amount | $ 217,980 | $ 156,212
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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- Definition The minimum common equity Tier One Capital Ratio (Common equity Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References No definition available. + Details
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- Definition Amount of total capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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