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Earnings Per Common Share | 3 Months Ended
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Mar. 31, 2023
Earnings Per Share [Abstract] |
Earnings per Common Share | Earnings Per Common Share Basic earnings per common share is computed by dividing net income remaining after allocation to participating unvested restricted shares, which includes unvested restricted shares of Arcosa stock held by employees of our former parent, Trinity Industries, Inc., by the weighted average number of basic common shares outstanding for the period. Except when the effect would be antidilutive, the calculation of diluted earnings per common share includes the weighted average net impact of nonparticipating unvested restricted shares. Total weighted average restricted shares were 1.3 million and 1.6 million shares for the three months ended March 31, 2023 and 2022, respectively. The computation of basic and diluted earnings per share follows.
| Three Months Ended March 31, 2023 |  | Three Months Ended March 31, 2022
| Income (Loss) |  | Average Shares |  | EPS |  | Income (Loss) |  | Average Shares |  | EPS
| (in millions, except per share amounts)
Net income | $ | 55.7 |  |  |  |  |  |  | $ | 20.2 |  |  |  |  |
Unvested restricted share participation | (0.2) |  |  |  |  |  |  | (0.1) |  |  |  |  |
Net income per common share – basic | 55.5 |  |  | 48.3 |  |  | $ | 1.15 |  |  | 20.1 |  |  | 48.2 |  |  | $ | 0.42 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Nonparticipating unvested restricted shares | — |  |  | 0.5 |  |  |  |  | — |  |  | 0.6 |  |  |
Net income per common share – diluted | $ | 55.5 |  |  | 48.8 |  |  | $ | 1.14 |  |  | $ | 20.1 |  |  | 48.8 |  |  | $ | 0.41 |

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