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Earnings Per Share | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Earnings Per Share | EARNINGS PER SHARE The Company computes earnings per share (“EPS”) in accordance with ASC 260, Earnings per Share, which requires that non-vested restricted stock containing non-forfeitable dividend rights should be treated as participating securities pursuant to the two-class method. Under the two-class method, net income is reduced by the amount of dividends declared in the period for common stock and participating securities. The remaining undistributed earnings are then allocated to common stock and participating securities as if all of the net income for the period had been distributed. The amounts of distributed and undistributed earnings allocated to participating securities for the three and nine months ended September 30, 2018 and 2017 were insignificant and did not materially impact the calculation of basic or diluted EPS. Basic EPS is computed by dividing income or loss available to common stockholders by the weighted average number of shares of common stock and non-vested restricted stock awards outstanding for the period. Diluted EPS is computed using the weighted average number of shares of common stock and non-vested restricted stock awards outstanding for the year plus the effect of dilutive potential common shares outstanding during the period. The dilutive effect of common stock equivalents is determined using the more dilutive of the two-class method or alternative methods. The Company uses the treasury stock method to determine the potentially dilutive impact of our employee stock options and restricted stock units, and the contingently issuable method for our performance-based restricted stock unit awards. For the three and nine months ended September 30, 2018, options to purchase 0.3 million shares of the Company’s common stock had an anti-dilutive effect on EPS, and accordingly, are excluded from the calculation of diluted EPS. For the three and nine months ended September 30, 2017, options to purchase 0.4 million and 0.8 million shares, respectively, of the Company’s common stock had an anti-dilutive effect on EPS, and accordingly, are excluded from the calculation of diluted EPS. The following table reconciles Net income to basic and diluted EPS:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in millions, except per share data) | 2018 |  | 2017 |  | 2018 |  | 2017
Net income | $ | 21.7 |  |  | $ | 12.5 |  |  | $ | 61.5 |  |  | $ | 31.2 |
Weighted average shares outstanding – Basic | 60.0 |  |  | 59.8 |  |  | 59.9 |  |  | 59.7 |
Dilutive effect of common stock equivalents | 1.1 |  |  | 0.8 |  |  | 1.1 |  |  | 0.7 |
Weighted average shares outstanding – Diluted | 61.1 |  |  | 60.6 |  |  | 61.0 |  |  | 60.4 |
Earnings per share: |  |  |  |  |  |  |
Basic | $ | 0.36 |  |  | $ | 0.21 |  |  | $ | 1.03 |  |  | $ | 0.52 |
Diluted | 0.36 |  |  | 0.21 |  |  | 1.01 |  |  | 0.52 |

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