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Goodwill and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets The changes in the carrying amount of goodwill were as follows:
| Balance at January 1, 2025 |  | Goodwill Acquired During the Year |  | Measurement Period Adjustments |  | Balance at December 31, 2025
| (In thousands)
West | $ | 123,674 |  |  | $ | 11,904 |  |  | $ | 1,997 |  |  | $ | 137,575 |
Mountain | 26,816 |  |  | — |  |  | — |  |  | 26,816 |
Central | 115,322 |  |  | 212,962 |  |  | (4,381) |  |  | 323,903 |
Energy Services | 31,413 |  |  | — |  |  | (39) |  |  | 31,374 |
Total | $ | 297,225 |  |  | $ | 224,866 |  |  | $ | (2,423) |  |  | $ | 519,668 |
| Balance at January 1, 2024 |  | Goodwill Acquired During the Year |  | Measurement Period Adjustments |  | Balance at December 31, 2024
| (In thousands)
West | $ | 123,599 |  |  | $ | 75 |  |  | $ | — |  |  | $ | 123,674 |
Mountain | 26,816 |  |  | — |  |  | — |  |  | 26,816 |
Central | 114,587 |  |  | 735 |  |  | — |  |  | 115,322 |
Energy Services | 9,476 |  |  | 21,937 |  |  | — |  |  | 31,413 |
Total | $ | 274,478 |  |  | $ | 22,747 |  |  | $ | — |  |  | $ | 297,225 |
Other amortizable intangible assets at December 31, were as follows:
| Average Useful Life In Years |  | 2025 |  | 2024
|  |  | (In thousands)
Customer relationships | 1-9 |  | $ | 34,699 |  |  | $ | 30,703 |
Less accumulated amortization |  |  | 15,789 |  |  | 11,060 |
|  |  | 18,910 |  |  | 19,643 |
Noncompete agreements | 1-4 |  | 3,107 |  |  | 3,950 |
Less accumulated amortization |  |  | 2,904 |  |  | 3,524 |
|  |  | 203 |  |  | 426 |
Tradename | 9 |  | 7,470 |  |  | 7,470 |
Less accumulated amortization |  |  | 871 |  |  | 124 |
|  |  | 6,599 |  |  | 7,346 |
Backlog | 1-2 |  | 10,395 |  |  | 390 |
Less accumulated amortization |  |  | 9,052 |  |  | 22 |
|  |  | 1,343 |  |  | 368 |
Other | 10-15 |  | 5,968 |  |  | 3,310 |
Less accumulated amortization |  |  | 343 |  |  | 1,679 |
|  |  | 5,625 |  |  | 1,631 |
Total |  |  | $ | 32,680 |  |  | $ | 29,414 |
The previous tables include goodwill and intangible assets associated with the business combinations completed during 2025 and 2024. For acquisitions in 2025, the weighted average useful life for customer relationships was two years and other intangible assets was four years. For acquisitions in 2024, the weighted average useful life for customer relationships was ten years, noncompete agreements was three years, tradename was ten years and other intangible assets was 11 years. For more information related to these business combinations, see Note 3. Amortization expense for amortizable intangible assets for the years ended December 31, 2025, 2024 and 2023, was $14.8 million, $2.5 million and $2.6 million, respectively. Estimated amortization expense for identifiable intangible assets as of December 31, 2025, was:
|  | 2026 |  | 2027 |  | 2028 |  | 2029 |  | 2030 |  | Thereafter
|  | (In thousands)
Amortization expense |  | $6,587 |  | $5,336 |  | $4,071 |  | $3,466 |  | $2,676 |  | $10,544

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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