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Pension Benefit Plans | 9 Months Ended
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Sep. 30, 2025
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 September 30, |  | For the Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Service cost | $ | 0.2 |  |  | $ | 0.4 |  |  | $ | 0.8 |  |  | $ | 1.2 |
Interest cost | 2.2 |  |  | 2.2 |  |  | 6.3 |  |  | 6.5 |
Expected return on plan assets | (1.8) |  |  | (1.9) |  |  | (5.4) |  |  | (5.7) |
Amortization of prior service cost | — |  |  | — |  |  | (0.1) |  |  | — |
Recognized actuarial loss | 0.4 |  |  | 0.3 |  |  | 1.3 |  |  | 0.7 |
Settlements and curtailments | 0.1 |  |  | 0.1 |  |  | 0.3 |  |  | 0.4 |
Net periodic benefit cost | $ | 1.1 |  |  | $ | 1.1 |  |  | $ | 3.2 |  |  | $ | 3.1 |

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