| Components of net periodic benefit cost |
Table 10.1 and 10.2 provide the components of net periodic benefit cost for our pension, supplemental executive retirement and other postretirement benefit plans for the three and six months ended June 30, 2026 and 2025. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Components of Net Periodic Benefit Cost | | Table | 10.1 | | | | | | | | | | | Three Months Ended June 30, | | | Pension and Supplemental Executive Retirement Plans | | Other Postretirement Benefit Plans | | (In thousands) | | 2026 | | 2025 | | 2026 | | 2025 | Company service cost (1) | | $ | 500 | | | $ | — | | | $ | 209 | | | $ | 235 | | | Interest cost | | 3,013 | | | 3,297 | | | 283 | | | 311 | | | Expected return on plan assets | | (3,079) | | | (3,442) | | | (3,395) | | | (2,911) | | | Amortization of: | | | | | | | | | | Net actuarial losses (gains) | | 948 | | | 546 | | | (962) | | | (693) | | | Prior service cost (credit) | | 87 | | | 87 | | | 119 | | | 117 | | | Cost of settlements and curtailments | | — | | | 3,680 | | | — | | | — | | | Net periodic benefit cost (benefit) | | $ | 1,469 | | | $ | 4,168 | | | $ | (3,746) | | | $ | (2,941) | | | | | | | | | | | | | Components of net periodic benefit cost | | Table | 10.2 | | | | | | | | | | | Six Months Ended June 30, | | | Pension and Supplemental Executive Retirement Plans | | Other Postretirement Benefit Plans | | (In thousands) | | 2026 | | 2025 | | 2026 | | 2025 | Company service cost (1) | | $ | 1,000 | | | $ | — | | | $ | 418 | | | $ | 469 | | | Interest cost | | 6,026 | | | 6,596 | | | 566 | | | 622 | | | Expected return on plan assets | | (6,157) | | | (6,884) | | | (6,789) | | | (5,822) | | | Amortization of: | | | | | | | | | | Net actuarial losses (gains) | | 1,895 | | | 1,092 | | | (1,923) | | | (1,385) | | | Prior service cost (credit) | | 173 | | | 173 | | | 236 | | | 235 | | | Cost of settlements and curtailments | | — | | | 3,680 | | | — | | | — | | | Net periodic benefit cost (benefit) | | $ | 2,937 | | | $ | 4,657 | | | $ | (7,492) | | | $ | (5,881) | |
(1)Effective January 1, 2026, company service cost includes expected administrative expenses of the defined benefit pension plan.
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