Acquisitions - Estimated Fair Values of Identifiable Intangible Assets and Related Weighted Average Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
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 Other
Finite-Lived Intangible Assets [Line Items]
Estimated fair value at acquisition date	$ 105,128
Weighted average amortization period at acquisition date	6 years 6 months
All Other | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated fair value at acquisition date	$ 77,293
Weighted average amortization period at acquisition date	6 years 8 months 12 days
All Other | Backlog
Finite-Lived Intangible Assets [Line Items]
Estimated fair value at acquisition date	$ 6,436
Weighted average amortization period at acquisition date	1 year 2 months 12 days
All Other | Trade names
Finite-Lived Intangible Assets [Line Items]
Estimated fair value at acquisition date	$ 5,698
Weighted average amortization period at acquisition date	14 years 10 months 24 days
All Other | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Estimated fair value at acquisition date	$ 6,673
Weighted average amortization period at acquisition date	5 years
All Other | 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
2020 Acquisitions
Finite-Lived Intangible Assets [Line Items]
Estimated fair value at acquisition date		$ 96,826
Weighted average amortization period at acquisition date		6 years 6 months
2020 Acquisitions | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated fair value at acquisition date		$ 81,154
Weighted average amortization period at acquisition date		6 years 1 month 6 days
2020 Acquisitions | Backlog
Finite-Lived Intangible Assets [Line Items]
Estimated fair value at acquisition date		$ 4,022
Weighted average amortization period at acquisition date		1 year 4 months 24 days
2020 Acquisitions | Trade names
Finite-Lived Intangible Assets [Line Items]
Estimated fair value at acquisition date		$ 7,654
Weighted average amortization period at acquisition date		14 years 4 months 24 days
2020 Acquisitions | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Estimated fair value at acquisition date		$ 3,996
Weighted average amortization period at acquisition date		5 years
2020 Acquisitions | Patented rights, developed technology, and process certifications
Finite-Lived Intangible Assets [Line Items]
Estimated fair value at acquisition date		$ 0