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v3.25.3

Retirement Plans (Tables) | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs [Table Text Block] | The components of net periodic pension cost and net periodic benefit cost for the RAP and Postretirement Plan were as follows:
| Three Months Ended Sep 30, | Nine Months Ended Sep 30,
(in thousands) | 2025 | 2024 | 2025 | 2024
RAP |  |  |  |
Service cost | $ | 636 |  | $ | 508 |  | $ | 2,255 |  | $ | 2,263 |
Interest cost | 3,027 |  | 2,943 |  | 8,655 |  | 8,380 |
Expected return on plan assets | (9,832) |  | (8,649) |  | (29,450) |  | (25,949) |
Amortization of prior service cost | (44) |  | (54) |  | (133) |  | (161) |
Total net periodic pension cost | $ | (6,213) |  | $ | (5,252) |  | $ | (18,673) |  | $ | (15,467) |
Postretirement Plan |  |  |  |
Interest cost | $ | 26 |  | $ | 18 |  | $ | 78 |  | $ | 54 |
Amortization of prior service cost | (19) |  | (19) |  | (56) |  | (56) |
Amortization of actuarial loss (gain) | 4 |  | (7) |  | 12 |  | (21) |
Total net periodic benefit (cost) | $ | 11 |  | $ | (8) |  | $ | 34 |  | $ | (23) |

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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://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: 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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