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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, 2022 | Sep. 30, 2022 | Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  | $ 1,520,000 |
Construction Contracting Services Business Acquisition |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date | $ 13,109 |  |
Weighted average amortization period at acquisition date | 6 years 4 months 24 days |  |
Construction Contracting Services Business Acquisition | Customer relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date | $ 11,565 |  |
Weighted average amortization period at acquisition date | 6 years |  |
Construction Contracting Services Business Acquisition | Backlog |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date | $ 557 |  |
Weighted average amortization period at acquisition date | 6 months |  |
Construction Contracting Services Business Acquisition | Trade names |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date | $ 850 |  |
Weighted average amortization period at acquisition date | 15 years |  |
Construction Contracting Services Business Acquisition | Non-compete agreements |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date | $ 137 |  |
Weighted average amortization period at acquisition date | 5 years |  |
Construction Contracting Services Business Acquisition | Patented rights, developed technology, and process certifications |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date | $ 0 |  |
Blattner Holding Company |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | $ 1,425,000
Weighted average amortization period at acquisition date |  |  | 7 years 9 months 18 days
Blattner Holding Company | Customer relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | $ 1,045,000
Weighted average amortization period at acquisition date |  |  | 7 years
Blattner Holding Company | Backlog |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | $ 130,000
Weighted average amortization period at acquisition date |  |  | 8 months 12 days
Blattner Holding Company | Trade names |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | $ 250,000
Weighted average amortization period at acquisition date |  |  | 15 years
Blattner Holding Company | Non-compete agreements |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | $ 0
Blattner Holding Company | Patented rights, developed technology, and process certifications |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | 0
Acquisitions In 2021 Excluding Blattner |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | $ 104,143
Weighted average amortization period at acquisition date |  |  | 6 years 4 months 24 days
Acquisitions In 2021 Excluding Blattner | Customer relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | $ 77,563
Weighted average amortization period at acquisition date |  |  | 6 years 8 months 12 days
Acquisitions In 2021 Excluding Blattner | Backlog |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | $ 6,431
Weighted average amortization period at acquisition date |  |  | 1 year 2 months 12 days
Acquisitions In 2021 Excluding Blattner | Trade names |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | $ 5,298
Weighted average amortization period at acquisition date |  |  | 14 years 10 months 24 days
Acquisitions In 2021 Excluding Blattner | Non-compete agreements |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | $ 5,823
Weighted average amortization period at acquisition date |  |  | 5 years
Acquisitions In 2021 Excluding Blattner | Patented rights, developed technology, and process certifications |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated fair value at acquisition date |  |  | $ 9,028
Weighted average amortization period at acquisition date |  |  | 3 years 6 months

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