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Pension Benefit Plans | 6 Months Ended
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Jun. 30, 2024
Retirement Benefits [Abstract] |
Pension Benefit Plans | 8. Pension Benefit Plans: The components of net periodic benefit cost for pension benefits were as follows (in millions):
| For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
Service cost | $ | 0.4 |  |  | $ | 0.5 |  |  | $ | 0.8 |  |  | $ | 1.1 |
Interest cost | 2.2 |  |  | 2.2 |  |  | 4.3 |  |  | 4.5 |
Expected return on plan assets | (1.9) |  |  | (2.4) |  |  | (3.8) |  |  | (4.7) |
Recognized actuarial loss | 0.2 |  |  | 0.2 |  |  | 0.4 |  |  | 0.4 |
Other | — |  |  | — |  |  | — |  |  | (0.3) |
Settlements and curtailments | 0.3 |  |  | 0.1 |  |  | 0.3 |  |  | 0.3 |
Net periodic benefit cost | $ | 1.2 |  |  | $ | 0.6 |  |  | $ | 2.0 |  |  | $ | 1.3 |

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