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Earnings (Loss) Per Share | 12 Months Ended
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Dec. 31, 2023
Earnings Per Share [Abstract] |
Earnings (Loss) Per Share | Earnings (Loss) Per Share The reconciliation of basic earnings (loss) per share on common stock for 2023, 2022 and 2021 follows (in millions of dollars except per share data):
| 2023 |  | 2022 |  | 2021
Net earnings (loss) | $ | 36.4 |  |  | $ | (62.5) |  |  | $ | 156.1 |
Less: Earnings allocated to participating securities | (0.7) |  |  | — |  |  | (1.4) |
Net earnings (loss) available to common shareholders | $ | 35.7 |  |  | $ | (62.5) |  |  | $ | 154.7 |
Average common shares outstanding (millions): |  |  |  |  |
Basic | 35.9 |  |  | 38.1 |  |  | 39.4 |
Dilutive share awards | 0.4 |  |  | — |  |  | 0.1 |
Diluted | 36.3 |  |  | 38.1 |  |  | 39.5 |
Basic earnings (loss) per share | $ | 0.99 |  |  | $ | (1.64) |  |  | $ | 3.93 |
Diluted earnings (loss) per share | $ | 0.98 |  |  | $ | (1.64) |  |  | $ | 3.91 |
Potentially dilutive shares outstanding for 2023 are primarily related to deferred common stock related to the non-employee directors deferred compensation plan and performance shares (see Stock-Based Compensation footnote for a description of performance shares). Due to our net loss in 2022, potentially dilutive shares outstanding, primarily related to deferred common stock associated with the non-employee directors deferred compensation plan, of 0.2 million shares in 2022, had an anti-dilutive effect on diluted earnings per share and were excluded from the computation. Potentially dilutive shares outstanding for 2021 are primarily related to deferred common stock related to the non-employee directors deferred compensation plan. We have presented earnings per share for our two classes of common stock on a combined basis. This presentation is consistent with the earnings per share computations that result for each class of common stock utilizing the two-class method as described in ASC Topic 260, “Earnings Per Share.” The two-class method is an earnings allocation formula which determines earnings per share for each class of common stock according to the dividends declared (or accumulated) and participation rights in the undistributed earnings. In applying the two-class method, we have determined that the undistributed earnings should be allocated to each class on a pro rata basis after consideration of all of the participation rights of the Class B shares (including voting and conversion rights) and our history of paying dividends equally to each class of common stock on a per share basis. The Company’s certificate of incorporation allows the board of directors to declare a cash dividend to Class A shares without declaring equal dividends to the Class B shares. Class B shares’ voting and conversion rights, however, effectively allow the Class B shares to participate in dividends equally with Class A shares on a per share basis. The Class B shares are the only shares with voting rights. The Class B shareholders are therefore able to exercise voting control with respect to all matters requiring stockholder approval, including the election of or removal of directors. The board of directors has historically declared and the Company historically has paid equal per share dividends on both the Class A and Class B shares. Each class has participated equally in all dividends declared since 1987. In addition, Class B shares are convertible, at the option of the holder, into Class A shares on a one-for-one basis. As a result, Class B shares can participate equally in any dividends declared on the Class A shares by exercising their conversion rights. Dividends paid per share for Class A and Class B common stock were $0.30 for 2023, $0.275 for 2022 and $0.10 for 2021.

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