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Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) | 10 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Oct. 31, 2024 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Product Information [Line Items] |  |  |  |  |
Advertising expenses |  | $ 1,500,000 | $ 1,100,000 | $ 900,000 |
Selling, general and administrative expenses |  | 189,338,000 | 149,544,000 | 131,375,000 |
Other income, net |  |  |  | 3,981,000 |
Operating revenue |  | 3,746,387,000 | 2,849,685,000 | 2,854,390,000 |
Income from equity method investments |  | 16,270,000 | 12,185,000 | 4,946,000 |
Interest in assets of joint venture |  | 0 |  |  |
Investment in equity method investments |  | 19,500,000 | 14,300,000 |  |
Income from equity method investments |  | 16,300,000 | 12,200,000 | 5,000,000.0 |
Cash, cash equivalents and restricted cash |  | 170,500,000 | 86,012,000 | 1,567,000 | $ 2,112,000
Restricted cash |  | 17,800,000 | 16,100,000 |  |
Impairment of intangible assets, excluding goodwill |  | $ 0 | 0 | 0 |
Minimum |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Performance measure target (as a percent) |  | 0.00% |  |  |
Minimum | Various Joint Ventures |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Investment in joint venture (as a percent) |  | 25.00% |  |  |
Maximum |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Performance measure target (as a percent) |  | 200.00% |  |  |
Maximum | Various Joint Ventures |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Investment in joint venture (as a percent) |  | 50.00% |  |  |
RSUs |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Award vesting period |  | 3 years |  |  |
MDU Resources | RSUs |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Award vesting period | 3 years |  |  |  |
Related party |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Other income, net |  | $ 0 | 0 |  |
Related party | Allocated corporate expenses |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
General corporate expenses |  |  | 30,400,000 | 27,100,000 |
Joint ventures |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Operating revenue |  |  | 600,000 | 7,800,000 |
Income from equity method investments |  |  | $ 200,000 | $ 2,100,000 |

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