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Earnings Per Share | 3 Months Ended
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Mar. 31, 2024
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Basic earnings per share is based on the weighted average number of common shares outstanding. Diluted earnings per share is based on the weighted average number of common shares outstanding and all dilutive potential common shares outstanding. The following table sets forth the computation of basic and diluted earnings per share:
(Dollars and shares in millions, except per share amounts) | Three Months Ended |  |
March 31, 2024 |  | March 31, 2023 |  |  |  |
Numerator: |  |  |  |  |  |  |
Net income (loss) | $ | 7.8 |  |  | $ | (3.5) |  |  |  |  |
Denominator: |  |  |  |  |  |  |
Weighted-average shares outstanding - basic | 18.6 |  |  | 18.6 |  |  |  |  |
Effect of dilutive shares | 0.1 |  |  | — |  |  |  |  |
Weighted-average shares outstanding - diluted | 18.7 |  |  | 18.6 |  |  |  |  |
Basic earnings (loss) per share | $ | 0.42 |  |  | $ | (0.19) |  |  |  |  |
Diluted earnings (loss) per share | $ | 0.42 |  |  | $ | (0.19) |  |  |  |  |
Dilutive shares are calculated using the treasury stock method and primarily include unvested restricted stock units. Anti-dilutive shares are excluded from the calculation of diluted shares and diluted earnings per share. For the three months ended March 31, 2024 and 2023,

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