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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure |  |  |  |
Pay vs Performance Disclosure, Table | The following table summarizes the total compensation paid to our principal executive officer (i.e., our President and Chief Executive Officer) (“PEO”) and Non-PEO NEOs versus the performance of the Company for the fiscal years ended December 31, 2023, 2022, 2021 and 2020.
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​ |  | ​ |  | ​ |  |  |  | ​ |  | Value of Initial Fixed $100 |  | ​ |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | Investment Based On | ​ | ​ | ​ | ​
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​ |  | ​ |  | ​ |  | Average |  | ​ |  | ​ |  | ​ |  | ​ |  | Selected
​ | ​ | ​ | ​ |  | ​ | Summary | ​ | Average | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Measure–
​ | ​ | Summary | ​ | ​ | ​ | Compensation | ​ | Compensation | ​ | Total | ​ | Peer Group | ​ |  | ​ | Operating
​ | ​ | Compensation | ​ | Compensation | ​ | Table Total for | ​ | Actually Paid | ​ | Shareholder | ​ | Total | ​ | ​ | ​ | Net Income
​ | ​ | Table Total | ​ | Actually Paid to | ​ | Non-PEO NEOs | ​ | to Non-PEO | ​ | Return | ​ | Shareholder | ​ | Net Income ($) | ​ | ($) (in
Year | ​ | PEO ($) | ​ | PEO ($)(1) | ​ | ($)(2) | ​ | NEOs ($)(1) (2) | ​ | ($) | ​ | Return ($)(3) | ​ | (in thousands) | ​ | thousands)(4)
2023 |  | 1,086,938 |  | 693,099 |  | 496,148 |  | 369,775 |  | 108.57 |  | 114.99 |  | 28,593 |  | 34,405
2022 |  | 1,011,283 |  | 958,814 |  | 491,425 |  | 455,800 |  | 120.22 |  | 114.38 |  | 43,022 |  | 43,332
2021 | ​ | 1,029,608 |  | 1,002,074 |  | 541,249 |  | 649,473 |  | 118.35 |  | 121.05 |  | 34,790 |  | 37,502
2020 |  | 809,352 |  | 632,857 |  | 478,478 |  | 338,936 |  | 77.69 |  | 84.99 |  | 24,332 |  | 27,355
​
(1) | Compensation Actually Paid (“CAP”) amounts include total compensation as reported in the Summary Compensation Table, less the grant date fair value of stock awards (RSA), plus the change in fair value of equity awards during the reported year. A reconciliation of CAP to total compensation as reported in the Summary Compensation Table is shown in the table below.
| (2) | William (“Billy”) Carroll, Jr. was the PEO for each of 2023, 2022, 2021 and 2020. The non-PEO NEOs included in the average calculations for 2023 are Wesley M. Welborn, Ronald J. Gorczynski, Rhett D. Jordan and Cynthia A. Cain, average calculations for 2022 are Wesley M. Welborn, Ronald J. Gorczynski, Gregory L. Davis and Rhett D. Jordan and for 2021 and 2020, Wesley M. Welborn and Ronald J. Gorczynski.
| (3) | Peer group total shareholder return reflects the S&P SmallCap Bank Index, which is a market-capitalization-weighted index that tracks the performance of NYSE and NASDAQ-listed banks, insurance underwriters and specialty lenders in S&P's coverage universe with $250 million to $1 billion market capitalization as of most recent pricing data. The S&P SmallCap Bank Index is the same index used for our performance graph disclosed in our Annual Report on Form 10-K for the year ended December 31, 2023.
| (4) | We selected operating net income, which is a non-GAAP measure, as the most important performance measurement for 2023. Operating net income is calculated by excluding the following from net income: securities gains and losses, merger related and restructuring expenses and other noncore operating items.
Company Selected Measure Name | operating net income |  |  |
Named Executive Officers, Footnote |
| (2) | William (“Billy”) Carroll, Jr. was the PEO for each of 2023, 2022, 2021 and 2020. The non-PEO NEOs included in the average calculations for 2023 are Wesley M. Welborn, Ronald J. Gorczynski, Rhett D. Jordan and Cynthia A. Cain, average calculations for 2022 are Wesley M. Welborn, Ronald J. Gorczynski, Gregory L. Davis and Rhett D. Jordan and for 2021 and 2020, Wesley M. Welborn and Ronald J. Gorczynski.
Peer Group Issuers, Footnote |
| (3) | Peer group total shareholder return reflects the S&P SmallCap Bank Index, which is a market-capitalization-weighted index that tracks the performance of NYSE and NASDAQ-listed banks, insurance underwriters and specialty lenders in S&P's coverage universe with $250 million to $1 billion market capitalization as of most recent pricing data. The S&P SmallCap Bank Index is the same index used for our performance graph disclosed in our Annual Report on Form 10-K for the year ended December 31, 2023.
PEO Total Compensation Amount | $ 1,086,938 | $ 1,011,283 | $ 1,029,608 | $ 809,352
PEO Actually Paid Compensation Amount | $ 693,099 | 958,814 | 1,002,074 | 632,857
Adjustment To PEO Compensation, Footnote |
(1) | Compensation Actually Paid (“CAP”) amounts include total compensation as reported in the Summary Compensation Table, less the grant date fair value of stock awards (RSA), plus the change in fair value of equity awards during the reported year. A reconciliation of CAP to total compensation as reported in the Summary Compensation Table is shown in the table below.
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​ | ​ | ​ | ​ | ​ | ​ | Add: | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Change in | ​ | ​ | ​ | Add: | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Value of | ​ | Add: Change in | ​ | Dividends on | ​ | ​
​ | ​ | Summary | ​ | ​ | ​ | Stock Awards | ​ | Value of Options | ​ | Restricted | ​ | Compensation
​ | ​ | Compensation | ​ | Deduct: | ​ | during FY | ​ | during FY | ​ | Stock | ​ | Actually Paid
Year | ​ | Table Total ($) | ​ | Stock Awards ($) | ​ | ($) | ​ | ($) | ​ | ($) | ​ | ($)
William (“Billy”) Y. Carroll, PEO |  |  |  |  |  |  |  |  |  |  |  |
2023 |  | 1,086,938 |  | (315,000) |  | (89,497) |  | — |  | 10,658 |  | 693,099
2022 |  | 1,011,283 |  | (50,013) |  | (10,418) |  | — |  | 7,962 |  | 958,814
2021 |  | 1,029,608 |  | (175,617) |  | 140,523 |  | — |  | 7,560 |  | 1,002,074
2020 |  | 809,352 |  | (98,735) |  | (82,760) |  | — |  | 5,000 |  | 632,857
Average Non-PEO NEO's |  |  |  |  |  |  |  |  |  |  |  |
2023 |  | 496,148 |  | (98,658) |  | (31,441) |  | — |  | 3,726 |  | 369,775
2022 |  | 491,425 |  | — |  | (13,013) |  | (25,461) |  | 2,849 |  | 455,800
2021 |  | 541,249 |  | (93,219) |  | 131,175 |  | 67,076 |  | 3,192 |  | 649,473
2020 |  | 478,478 |  | (52,406) |  | (48,505) |  | (40,085) |  | 1,454 |  | 338,936
​ |  |  |
Non-PEO NEO Average Total Compensation Amount | $ 496,148 | 491,425 | 541,249 | 478,478
Non-PEO NEO Average Compensation Actually Paid Amount | $ 369,775 | 455,800 | 649,473 | 338,936
Adjustment to Non-PEO NEO Compensation Footnote |
(1) | Compensation Actually Paid (“CAP”) amounts include total compensation as reported in the Summary Compensation Table, less the grant date fair value of stock awards (RSA), plus the change in fair value of equity awards during the reported year. A reconciliation of CAP to total compensation as reported in the Summary Compensation Table is shown in the table below.
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​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​
​ | ​ | ​ | ​ | ​ | ​ | Add: | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Change in | ​ | ​ | ​ | Add: | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Value of | ​ | Add: Change in | ​ | Dividends on | ​ | ​
​ | ​ | Summary | ​ | ​ | ​ | Stock Awards | ​ | Value of Options | ​ | Restricted | ​ | Compensation
​ | ​ | Compensation | ​ | Deduct: | ​ | during FY | ​ | during FY | ​ | Stock | ​ | Actually Paid
Year | ​ | Table Total ($) | ​ | Stock Awards ($) | ​ | ($) | ​ | ($) | ​ | ($) | ​ | ($)
William (“Billy”) Y. Carroll, PEO |  |  |  |  |  |  |  |  |  |  |  |
2023 |  | 1,086,938 |  | (315,000) |  | (89,497) |  | — |  | 10,658 |  | 693,099
2022 |  | 1,011,283 |  | (50,013) |  | (10,418) |  | — |  | 7,962 |  | 958,814
2021 |  | 1,029,608 |  | (175,617) |  | 140,523 |  | — |  | 7,560 |  | 1,002,074
2020 |  | 809,352 |  | (98,735) |  | (82,760) |  | — |  | 5,000 |  | 632,857
Average Non-PEO NEO's |  |  |  |  |  |  |  |  |  |  |  |
2023 |  | 496,148 |  | (98,658) |  | (31,441) |  | — |  | 3,726 |  | 369,775
2022 |  | 491,425 |  | — |  | (13,013) |  | (25,461) |  | 2,849 |  | 455,800
2021 |  | 541,249 |  | (93,219) |  | 131,175 |  | 67,076 |  | 3,192 |  | 649,473
2020 |  | 478,478 |  | (52,406) |  | (48,505) |  | (40,085) |  | 1,454 |  | 338,936
Compensation Actually Paid vs. Total Shareholder Return | Relationship Between PEO and Average Non-PEO NEOs Compensation Actually Paid and Company Total Shareholder Return (“TSR”) The following chart sets forth the relationship between Compensation Actually Paid to our PEO, the average of Compensation Actually Paid to our other NEOs. In addition, the graph compares our cumulative TSR and our Peer cumulative TSR for the indicated years. The cumulative TSR assumes an initial investment of $100 at the market close on December 31, 2019, in SMBK common stock and in the common stock of companies within our Peer group. A $100 investment in SMBK stock on December 31, 2019, would be valued at $108.57 at December 31, 2023, which slightly underperformed the TSR of a $100 investment in our Peer index, which would be valued at $112.03, invested over the same time period. ​ |  |  |
Compensation Actually Paid vs. Net Income | Relationship Between PEO and Average Non-PEO NEOs Compensation Actually Paid and Net Income The following chart sets forth the relationship between Compensation Actually Paid to our PEOs, the average of Compensation Actually Paid to our other NEOs, and our Net Income each of the four most recently completed fiscal years. |  |  |
Compensation Actually Paid vs. Company Selected Measure | Relationship Between PEO and Average Non-PEO NEOs Compensation Actually Paid and Operating Net Income The following chart sets forth the relationship between Compensation Actually Paid to our PEOs, the average of Compensation Actually Paid to our other NEOs, and our operating net income during the four most recently completed fiscal years. |  |  |
Tabular List, Table | ​ Tabular List of Important Financial Measures The most important financial performance measures used by the Company in 2023 to set the compensation for its principal executive officer, or PEO and all of its non-PEO Named Executive Officers are listed below:
| ● | Operating Net Income
| ● | Net Balance Loan Growth
| ● | Noninterest Deposit Growth
| ● | Noninterest Income / Revenue
| ● | Operating Return on Average Tangible Common Equity
| ● | Operating Earnings per Diluted Common Share Growth
Total Shareholder Return Amount | $ 108.57 | 120.22 | 118.35 | 77.69
Peer Group Total Shareholder Return Amount | 114.99 | 114.38 | 121.05 | 84.99
Net Income (Loss) | $ 28,593,000 | $ 43,022,000 | $ 34,790,000 | $ 24,332,000
Company Selected Measure Amount | 34,405,000 | 43,332,000 | 37,502,000 | 27,355,000
PEO Name | William (“Billy”) Carroll, Jr. | William (“Billy”) Carroll, Jr. | William (“Billy”) Carroll, Jr. | William (“Billy”) Carroll, Jr.
Market Capitalization Amt Maximum | $ 1,000,000,000 |  |  |
Market Capitalization Amt Minimum | $ 250,000,000 |  |  |
Measure:: 1 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Operating Net Income |  |  |
Non-GAAP Measure Description |
| (4) | We selected operating net income, which is a non-GAAP measure, as the most important performance measurement for 2023. Operating net income is calculated by excluding the following from net income: securities gains and losses, merger related and restructuring expenses and other noncore operating items.
Measure:: 2 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Net Balance Loan Growth |  |  |
Measure:: 3 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Noninterest Deposit Growth |  |  |
Measure:: 4 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Noninterest Income / Revenue |  |  |
Measure:: 5 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Operating Return on Average Tangible Common Equity |  |  |
Measure:: 6 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Operating Earnings per Diluted Common Share Growth |  |  |
PEO | Stock Awards [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | $ (315,000) | $ (50,013) | $ (175,617) | $ (98,735)
PEO | Change In Value Of Stock Awards During FY [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (89,497) | (10,418) | 140,523 | (82,760)
PEO | Dividends On Restricted Stock [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 10,658 | 7,962 | 7,560 | 5,000
Non-PEO NEO | Stock Awards [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (98,658) |  | (93,219) | (52,406)
Non-PEO NEO | Change In Value Of Stock Awards During FY [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (31,441) | (13,013) | 131,175 | (48,505)
Non-PEO NEO | Change In Value Of Options During FY [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  | (25,461) | 67,076 | (40,085)
Non-PEO NEO | Dividends On Restricted Stock [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | $ 3,726 | $ 2,849 | $ 3,192 | $ 1,454

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