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Acquisitions - Estimated Fair Values of Identifiable Intangible Assets and Related Weighted Average Amortization (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2024
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value |  | $ 947,000
CEI |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 656,000 |
Amortization Period in Years | 9 years 2 months 12 days |
CEI | Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 396,000 |
Amortization Period in Years | 8 years |
CEI | Backlog |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 90,000 |
Amortization Period in Years | 3 years 3 months 18 days |
CEI | Trade names |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 170,000 |
Amortization Period in Years | 15 years |
CEI | Non-compete agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 0 |
CEI | Patented rights, developed technology, process certifications and other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | 0 |
All Others |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 213,573 |
Amortization Period in Years | 7 years 4 months 24 days |
All Others | Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 167,486 |
Amortization Period in Years | 7 years |
All Others | Backlog |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 20,125 |
Amortization Period in Years | 2 years 9 months 18 days |
All Others | Trade names |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 20,242 |
Amortization Period in Years | 14 years 10 months 24 days |
All Others | Non-compete agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 3,444 |
Amortization Period in Years | 5 years |
All Others | Patented rights, developed technology, process certifications and other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 2,276 |
Amortization Period in Years | 15 years |

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