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Earnings per share (Q2) (Tables) | 6 Months Ended | 12 Months Ended
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Jun. 30, 2018 | Dec. 31, 2017
Earnings Per Share [Abstract] |  |
Schedule of Earnings Per Share, Basic and Diluted | The following is a summary of the basic and diluted earnings per share for the three and six months ended June 30, 2018 and 2017.
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Net income available to common shareholders | $ | 3,931,556 |  |  | $ | 1,648,286 |  |  | $ | 7,346,326 |  |  | $ | 3,097,138 |
Weighted average common shares outstanding | 12,201,185 |  |  | 8,216,567 |  |  | 11,708,746 |  |  | 7,872,609 |
Effect of dilutive stock options | 119,313 |  |  | 108,971 |  |  | 113,751 |  |  | 104,673 |
Diluted shares | 12,320,498 |  |  | 8,325,538 |  |  | 11,822,497 |  |  | 7,977,282 |
Basic earnings per common share | $ | 0.32 |  |  | $ | 0.20 |  |  | $ | 0.63 |  |  | $ | 0.39 |
Diluted earnings per common share | $ | 0.32 |  |  | $ | 0.20 |  |  | $ | 0.62 |  |  | $ | 0.39 |
| The effect from the stock options on incremental shares from the assumed conversions for net income per share-basic and net income per share-diluted are presented below. There were antidilutive shares of 13,166 and 17,649 for the years ended December 31, 2017 and 2016, respectively.
(Dollars in thousands, except share amounts) |  | 2017 |  | 2016
Basic earnings per share computation: |  |  |  |  |  |
Net income available to common stockholders |  | $ | 4,820 |  |  | $ | 4,777 |
Average common shares outstanding – basic |  | 8,639,212 |  |  | 5,838,574 |
Basic earnings per share |  | $ | 0.56 |  |  | $ | 0.82 |
Diluted earnings per share computation: |  |  |  |  |  |
Net income available to common stockholders |  | $ | 4,820 |  |  | $ | 4,777 |
Average common shares outstanding – basic |  | 8,639,212 |  |  | 5,838,574 |
Incremental shares from assumed conversions: |  |  |  |  |  |
Stock options |  | 154,315 |  |  | 280,369 |
Average common shares outstanding - diluted |  | 8,793,527 |  |  | 6,118,943 |
Diluted earnings per share |  | $ | 0.55 |  |  | $ | 0.78 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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