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Earnings per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2019
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings per Share | The following table sets forth the computation of basic and diluted earnings per share for the three and nine month periods ended September 30, 2019 and 2018:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 | 2018 |  | 2019 | 2018
Net income | $ | 49.1 |  | $ | 41.4 |  |  | $ | 128.6 |  | $ | 119.8 |
Weighted average common shares outstanding for basic earnings per share computation | 64,832,324 |  | 58,254,575 |  |  | 63,232,575 |  | 56,951,029 |
Dilutive effects of stock-based compensation | 211,162 |  | 385,900 |  |  | 238,708 |  | 378,998 |
Weighted average common shares outstanding for diluted earnings per common share computation | 65,043,486 |  | 58,640,475 |  |  | 63,471,283 |  | 57,330,027 |
Basic earnings per common share | $ | 0.76 |  | $ | 0.71 |  |  | $ | 2.03 |  | $ | 2.10 |
Diluted earnings per common share | $ | 0.76 |  | $ | 0.71 |  |  | $ | 2.03 |  | $ | 2.09 |
Anti-dilutive unvested time restricted stock | 4,808 |  | 4,376 |  |  | 5,569 |  | 120,553 |

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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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