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Earnings per share (Tables) | 9 Months Ended
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Sep. 30, 2018
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 nine months ended September 30, 2018 and 2017.
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Net income available to common shareholders | $ | 4,323,960 |  |  | $ | 1,684,869 |  |  | $ | 11,670,286 |  |  | $ | 4,782,007 |
Weighted average common shares outstanding | 12,718,861 |  |  | 8,234,783 |  |  | 12,049,151 |  |  | 7,994,661 |
Effect of dilutive stock options | 98,695 |  |  | 85,991 |  |  | 94,687 |  |  | 79,185 |
Diluted shares | 12,817,556 |  |  | 8,320,774 |  |  | 12,143,838 |  |  | 8,073,846 |
Basic earnings per common share | $ | 0.34 |  |  | $ | 0.20 |  |  | $ | 0.97 |  |  | $ | 0.60 |
Diluted earnings per common share | $ | 0.34 |  |  | $ | 0.20 |  |  | $ | 0.96 |  |  | $ | 0.59 |

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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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