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EARNINGS PER-SHARE | 3 Months Ended
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Mar. 31, 2019
EARNINGS PER-SHARE |
EARNINGS PER-SHARE | 10. EARNINGS PER SHARE Basic earnings per share is determined by dividing net income by the weighted-average common shares outstanding during the period. The calculation of diluted earnings per share includes the dilutive effect of unexercised non-qualified stock options and non-vested restricted stock units. The denominator used to compute basic and diluted earnings per share for the three months ended March 31, 2019 and 2018, are as follows:
|  | Three Months Ended March 31, 2019 |  | Three Months Ended March 31, 2018 |
|  |  |  |  | Weighted |  | Per |  |  |  |  | Weighted |  | Per |
|  |  |  |  | Average |  | Common |  |  |  |  | Average |  | Common |
|  | Net |  | Common |  | Share |  | Net |  | Common |  | Share |
(In millions, except per share amounts) |  | Income |  | Shares |  | Amount |  | Income |  | Shares |  | Amount |
Basic: |  | $ | 12.5 |  | 42.8 |  | $ | 0.29 |  | $ | 14.2 |  | 42.6 |  | $ | 0.33 |
Effect of Dilutive Securities: |  |  |  |  | 0.3 |  |  | — |  |  |  |  | 0.3 |  |  | — |
Diluted: |  | $ | 12.5 |  | 43.1 |  | $ | 0.29 |  | $ | 14.2 |  | 42.9 |  | $ | 0.33 |
The computation of weighted-average common shares outstanding excludes a nominal amount of anti-dilutive non-qualified stock options for each period ended March 31, 2019 and 2018.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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