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Employee benefit plans (Tables) | 6 Months Ended
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Jun. 30, 2024
Retirement Benefits [Abstract] |
Schedule of net benefit costs | Components of net periodic benefit cost (credit) for the Company's pension benefit plans were as follows:
| Three Months Ended | Six Months Ended
| June 30, | June 30,
| 2024 | 2023 | 2024 | 2023
| (In thousands)
Components of net periodic benefit cost (credit): |  |  |  |
Interest cost | $ | 3,200 |  | $ | 3,380 |  | $ | 6,400 |  | $ | 7,169 |
Expected return on assets | (4,028) |  | (4,299) |  | (8,056) |  | (9,048) |
Amortization of net actuarial loss | 1,037 |  | 773 |  | 2,074 |  | 1,674 |
Net periodic benefit cost (credit) | $ | 209 |  | $ | (146) |  | $ | 418 |  | $ | (205) |
Components of net periodic benefit credit for the Company's other postretirement benefit plans were as follows:
| Three Months Ended | Six Months Ended
| June 30, | June 30,
| 2024 | 2023 | 2024 | 2023
| (In thousands)
Components of net periodic benefit credit: |  |  |  |
Service cost | $ | 126 |  | $ | 136 |  | $ | 252 |  | $ | 274 |
Interest cost | 459 |  | 489 |  | 918 |  | 978 |
Expected return on assets | (1,329) |  | (1,334) |  | (2,658) |  | (2,668) |
Amortization of prior service credit | (330) |  | (329) |  | (660) |  | (659) |
Amortization of net actuarial gain | (72) |  | (70) |  | (144) |  | (126) |
Net periodic benefit credit, including amount capitalized | (1,146) |  | (1,108) |  | (2,292) |  | (2,201) |
Less amount capitalized | 47 |  | 53 |  | 69 |  | 77 |
Net periodic benefit credit | $ | (1,193) |  | $ | (1,161) |  | $ | (2,361) |  | $ | (2,278) |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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