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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2025
Share-Based Payment Arrangement [Abstract] |
Schedule of Nonvested Restricted Stock Units Activity | A summary of time-vesting RSUs activity for the years ended December 31, 2025 and 2024, including the conversion to Everus RSUs in 2024, was as follows:
|  |  | RSUs |
|  |  |  |  | Number of Shares |  | Weighted-Average Grant-Date Fair Value Per Share 2 |
Nonvested pre-Separation |  |  |  |  | 243,327 |  |  | $ | 21.37 |  |
Conversion to Everus RSUs 1 |  |  |  |  | (109,596) |  |  |  |
Vested shares |  |  |  |  | (30,939) |  |  | 40.72 |  |
Nonvested as of December 31, 2024 |  |  |  |  | 102,792 |  |  | 38.33 |  |
Granted shares |  |  |  |  | 67,369 |  |  | 52.38 |  |
Vested shares |  |  |  |  | (45,419) |  |  | 38.82 |  |
Nonvested as of December 31, 2025 |  |  |  |  | 124,742 |  |  | $ | 45.74 |  |
__________________ 1.Includes the conversion adjustments to preserve the intrinsic value of the awards. 2.Weighted-average grant-date fair value per share represented post-separations of Knife River and the Company from MDU Resources in 2023 and 2024, respectively, as applicable.
Schedule of Nonvested Performance-Based Units Activity | A summary of PSAs activity for the year ended December 31, 2025 was as follows:
|  |  | PSAs |
|  |  |  |  | Number of Shares |  | Weighted Average Grant-Date Fair Value Per Share |
Nonvested as of December 31, 2024 |  |  |  |  | — |  |  | $ | — |  |
Granted shares |  |  |  |  | 55,092 |  |  | 52.10 |  |
Nonvested as of December 31, 2025 |  |  |  |  | 55,092 |  |  | $ | 52.10 |  |
Schedule of Valuation Assumptions | The weighted-average grant-date fair value per share and the assumptions used for grants applicable to PSAs with a market condition granted during the year ended December 31, 2025 were:
| Annual Award |  | Off-Cycle Award |  |
Weighted-average grant-date fair value per share | $ | 55.82 |  |  | $ | 72.20 |  |  |
Assumptions: |  |  |  |  |
Performance period | January 1, 2025 to December 31, 2027 |  | January 1, 2025 to December 31, 2027 |  |
Grant date closing stock price | $ | 46.54 |  |  | $ | 57.39 |  |  |
Blended volatility range | 44.33% - 47.07% |  | 46.31% - 52.10% |  |
Risk-free interest rate range | 4.37% - 4.46% |  | 4.08% - 4.24% |  |
Dividend yield | 0.00 | % |  | 0.00 | % |  |

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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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