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Acquisitions - Estimated Fair Values of Identifiable Intangible Assets and Related Weighted Average Amortization (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
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 |  |
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 | 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 | 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 | 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 | Non-compete agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated fair value at acquisition date |  | $ 0
Blattner | Patented rights, developed technology, and process certifications |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated fair value at acquisition date |  | 0
All Others |  |
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
All Others | 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
All Others | 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
All Others | 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
All Others | 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
All Others | 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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