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Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2025
Supplemental Cash Flow Information [Abstract] |
Schedule of Cash Flow Information | Cash expenditures for interest and income taxes for the years ended December 31 were as follows:
| 2025 |  | 2024 |  | 2023
| (In thousands)
Interest paid, net | $ | 78,780 |  |  | $ | 56,916 |  |  | $ | 54,925 |
Income taxes paid, net | $ | 41,765 |  |  | $ | 62,181 |  |  | $ | 76,689 |
Noncash investing and financing transactions at December 31 were as follows:
| 2025 |  | 2024 |  | 2023
| (In thousands)
Property, plant and equipment additions in accounts payable | $ | 25,840 |  |  | $ | 22,167 |  |  | $ | 12,672 |
Right-of-use assets obtained in exchange for new operating lease liabilities | $ | 15,811 |  |  | $ | 20,777 |  |  | $ | 14,967 |
Equity contribution from Centennial related to the Separation | $ | — |  |  | $ | — |  |  | $ | 64,724 |
Equity contribution to MDU Resources for asset/liability transfers related to the Separation | $ | — |  |  | $ | — |  |  | $ | (1,537) |
MDU Resources’ stock issued in connection with a business combination | $ | — |  |  | $ | — |  |  | $ | 383 |
Accrual for holdback payment related to a business combination | $ | 5,686 |  |  | $ | — |  |  | $ | — |
The following table provides cash taxes paid (net of refunds) for the year end December 31 were as follows:
Jurisdiction |  | 2025 |  | 2024
|  | (In thousands)
Federal |  | $ | 26,500 |  |  | $ | 40,736 |
Oregon |  | 6,350 |  |  | 7,229 |
Minnesota |  | 1,300 |  |  | 4,396 |
Other States/Cities |  | 7,615 |  |  | 9,820 |
Total |  | $ | 41,765 |  |  | $ | 62,181 |

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