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Regulatory Matters (FY) (Tables) | 12 Months Ended
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Dec. 31, 2017
Banking and Thrift [Abstract] |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations | Actual and required capital levels at December 31, 2017 and 2016 are presented below (dollars in thousands):
|  | Actual |  | Minimum for capital adequacy purposes |  | Minimum to be well capitalized under prompt corrective action provisions (1)
|  | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SmartFinancial, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk-Weighted Assets) |  | $ | 163,683 |  |  | 10.98 | % |  | $ | 119,257 |  |  | 8.00 | % |  |  |  |
Tier 1 Capital (to Risk-Weighted Assets) |  | 157,823 |  |  | 10.59 | % |  | 89,442 |  |  | 6.00 | % |  |  |  |
Common Equity Tier 1 Capital (to Risk-Weighted Assets) |  | 157,823 |  |  | 10.59 | % |  | 67,082 |  |  | 4.50 | % |  |  |  |
Tier 1 Capital (to Average Assets) |  | 157,823 |  |  | 10.78 | % |  | 58,562 |  |  | 4.00 | % |  |  |  |
SmartBank |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk-Weighted Assets) |  | $ | 168,148 |  |  | 11.29 | % |  | $ | 119,111 |  |  | 8.00 | % |  | $ | 148,889 |  |  | 10.00 | %
Tier 1 Capital (to Risk-Weighted Assets) |  | 162,288 |  |  | 10.90 | % |  | 89,333 |  |  | 6.00 | % |  | 119,111 |  |  | 8.00 | %
Common Equity Tier 1 Capital (to Risk-Weighted Assets) |  | 162,288 |  |  | 10.90 | % |  | 67,000 |  |  | 4.50 | % |  | 96,778 |  |  | 6.50 | %
Tier 1 Capital (to Average Assets) |  | 162,288 |  |  | 11.26 | % |  | 57,656 |  |  | 4.00 | % |  | 72,070 |  |  | 5.00 | %
(1) The prompt corrective action provisions are applicable at the Bank level only.
|  | Actual |  | Minimum for capital adequacy purposes |  | Minimum to be well capitalized under prompt corrective action provisions (1)
|  | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SmartFinancial, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk-Weighted Assets) |  | $ | 105,756 |  |  | 11.99 | % |  | $ | 70,553 |  |  | 8.00 | % |  |  |  |
Tier 1 Capital (to Risk-Weighted Assets) |  | 100,651 |  |  | 11.42 | % |  | 52,915 |  |  | 6.00 | % |  |  |  |
Common Equity Tier 1 Capital (to Risk-Weighted Assets) |  | 88,651 |  |  | 10.05 | % |  | 39,686 |  |  | 4.50 | % |  |  |  |
Tier 1 Capital (to Average Assets) |  | 100,651 |  |  | 9.81 | % |  | 41,052 |  |  | 4.00 | % |  |  |  |
SmartBank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk-Weighted Assets) |  | $ | 104,705 |  |  | 11.88 | % |  | $ | 70,535 |  |  | 8.00 | % |  | $ | 88,169 |  |  | 10.00 | %
Tier 1 Capital (to Risk-Weighted Assets) |  | 99,600 |  |  | 11.30 | % |  | 52,901 |  |  | 6.00 | % |  | 70,535 |  |  | 8.00 | %
Common Equity Tier 1 Capital (to Risk-Weighted Assets) |  | 99,600 |  |  | 11.30 | % |  | 39,676 |  |  | 4.50 | % |  | 57,310 |  |  | 6.50 | %
Tier 1 Capital (to Average Assets) |  | 99,600 |  |  | 9.71 | % |  | 41,041 |  |  | 4.00 | % |  | 51,301 |  |  | 5.00 | %
(1) The prompt corrective action provisions are applicable at the Bank level only.

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