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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Changes in the Carrying Value of Goodwill by Segment | The following is a summary of changes in the carrying value of Goodwill by segment (in thousands):
Carrying value of Goodwill | Engineering & Consulting |  | Installation & Maintenance |  | Total
Balance, December 31, 2023 | $ | 327,950 |  |  | $ | 348,084 |  |  | $ | 676,034 |
Acquisitions | 124,784 |  |  | — |  |  | 124,784 |
Measurement period adjustments | (1,853) |  |  | 33 |  |  | (1,820) |
Impairment | (17,804) |  |  | — |  |  | (17,804) |
Balance, December 31, 2024 | 433,077 |  |  | 348,117 |  |  | 781,194 |
Acquisitions | 3,139 |  |  | 3,232 |  |  | 6,371 |
Measurement period adjustments | 1,737 |  |  | — |  |  | 1,737 |
Impairment | (24,966) |  |  | — |  |  | (24,966) |
Balance, December 31, 2025 | $ | 412,987 |  |  | $ | 351,349 |  |  | $ | 764,336 |
Accumulated goodwill impairment |  |  |  |  |
Balance, December 31, 2023 | $ | 5,051 |  |  | $ | 47,407 |  |  | $ | 52,458 |
Balance, December 31, 2024 | $ | 22,855 |  |  | $ | 47,407 |  |  | $ | 70,262 |
Balance, December 31, 2025 | $ | 47,821 |  |  | $ | 47,407 |  |  | $ | 95,228 |
Schedule of Identifiable Intangible Assets | The Company’s identifiable intangible assets consist of the following (in thousands, except weighted-average remaining lives):
| December 31, 2025
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Weighted-average Remaining Life (in years)
Customer relationships | $ | 658,798 |  |  | $ | (209,054) |  |  | $ | 449,744 |  |  | 8.3
Trade names | 180,428 |  |  | (80,068) |  |  | 100,360 |  |  | 5.4
Contract backlog | 1,570 |  |  | (254) |  |  | 1,316 |  |  | 1.4
| $ | 840,796 |  |  | $ | (289,376) |  |  | $ | 551,420 |  |  |
| December 31, 2024
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Weighted-average Remaining Life (in years)
Customer relationships | $ | 652,315 |  |  | $ | (153,262) |  |  | $ | 499,053 |  |  | 9.3
Trade names | 178,970 |  |  | (61,137) |  |  | 117,833 |  |  | 6.4
Contract backlog | 18,745 |  |  | (11,381) |  |  | 7,364 |  |  | 0.6
| $ | 850,030 |  |  | $ | (225,780) |  |  | $ | 624,250 |  |  |
Schedule of Future Amortization of Intangible Assets | Future amortization of intangible assets as of December 31, 2025 was as follows (in thousands):
Year ending December 31: |
2026 | $ | 78,407 |
2027 | 74,063 |
2028 | 73,763 |
2029 | 73,737 |
2030 | 72,475 |
Thereafter | 178,975 |
| $ | 551,420 |

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