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Earnings per Share | 3 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Earnings per Share | Earnings per Share Basic earnings per share attributable to MSA Safety Incorporated common shareholders is computed by dividing net income, after the deduction of preferred stock dividends and undistributed earnings allocated to participating securities, by the weighted average number of common shares outstanding during the period. Diluted earnings per share attributable to MSA Safety Incorporated common shareholders assumes the issuance of common stock for all potentially dilutive share equivalents outstanding not classified as participating securities. Participating securities are defined as unvested stock-based payment awards that contain nonforfeitable rights to dividends.
Amounts attributable to MSA Safety Incorporated common shareholders: |  | Three Months Ended March 31,
(In thousands, except per share amounts) |  | 2018 |  | 2017
Net income |  | $ | 32,371 |  |  | $ | 14,413 |
Preferred stock dividends |  | (10 | ) |  | (10 | )
Net income available to common equity |  | 32,361 |  |  | 14,403 |
Dividends and undistributed earnings allocated to participating securities |  | (32 | ) |  | (17 | )
Net income available to common shareholders |  | 32,329 |  |  | 14,386 |
Basic weighted-average shares outstanding |  | 38,216 |  |  | 37,766 |
Stock options and other stock compensation |  | 562 |  |  | 827 |
Diluted weighted-average shares outstanding |  | 38,778 |  |  | 38,593 |
Antidilutive stock options |  | — |  |  | — |
Earnings per share: |  |  |  |
Basic |  | $ | 0.85 |  |  | $ | 0.38 |
Diluted |  | $ | 0.83 |  |  | $ | 0.37 |

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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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