Acquisitions, Goodwill and Other Intangible Assets, Net - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended			24 Months Ended
	May 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Acquisition consideration
Cash, net of cash acquired		$ 635,763	$ 1,244,603	$ 24,971
Identifiable assets acquired and liabilities assumed:
Goodwill		$ 2,045,041	1,520,575	1,243,000	$ 2,045,041
Business Combination Bargain Purchase Gain Recognized Statement of Income or Comprehensive Income Extensible Enumeration not Disclosed Flag		Bargain purchase gain
Power Delivery
Identifiable assets acquired and liabilities assumed:
Goodwill		$ 270,100	303,400	$ 150,100	270,100
2022 Acquisitions
Acquisition consideration
Cash, net of cash acquired		612,000
Shares transferred		173,700
Estimated fair value of warrants		10,300
Estimated fair value of contingent consideration		2,800			2,800
Total consideration		798,800
Identifiable assets acquired and liabilities assumed:
Accounts receivable and contract assets		599,700			599,700
Current assets		36,100			36,100
Property and equipment		243,200			243,200
Long-term assets, primarily operating lease right-of-use assets		37,000			37,000
Amortizing intangible assets		368,100			368,100
Accounts payable		(141,100)			(141,100)
Current liabilities, including current portion of operating lease liabilities		(425,100)			(425,100)
Long-term debt, including finance lease obligations		(331,000)			(331,000)
Long-term debt, including finance lease obligations		(132,800)			(132,800)
Total identifiable net assets		254,100			254,100
Goodwill		544,700			544,700
Total net assets acquired, including goodwill		798,800			798,800
Business combinations, contingent consideration, earn-out liabilities		2,800			2,800
IEA
Acquisition consideration
Cash, net of cash acquired		564,500
Shares transferred		173,700
Estimated fair value of warrants		10,300
Estimated fair value of contingent consideration		0			0
Total consideration		748,500
Identifiable assets acquired and liabilities assumed:
Accounts receivable and contract assets		593,600			593,600
Current assets		34,500			34,500
Property and equipment		213,000			213,000
Long-term assets, primarily operating lease right-of-use assets		36,900			36,900
Amortizing intangible assets		362,200			362,200
Accounts payable		(136,400)			(136,400)
Current liabilities, including current portion of operating lease liabilities		(422,500)			(422,500)
Long-term debt, including finance lease obligations		(330,800)			(330,800)
Long-term debt, including finance lease obligations		(132,600)			(132,600)
Total identifiable net assets		217,900			217,900
Goodwill		530,600			530,600
Total net assets acquired, including goodwill		748,500			748,500
Business combinations, contingent consideration, earn-out liabilities		0			0
All other
Acquisition consideration
Cash, net of cash acquired		47,500
Shares transferred		0
Estimated fair value of warrants		0
Estimated fair value of contingent consideration		2,800			2,800
Total consideration		50,300
Identifiable assets acquired and liabilities assumed:
Accounts receivable and contract assets		6,100			6,100
Current assets		1,600			1,600
Property and equipment		30,200			30,200
Long-term assets, primarily operating lease right-of-use assets		100			100
Amortizing intangible assets		5,900			5,900
Accounts payable		(4,700)			(4,700)
Current liabilities, including current portion of operating lease liabilities		(2,600)			(2,600)
Long-term debt, including finance lease obligations		(200)			(200)
Long-term debt, including finance lease obligations		(200)			(200)
Total identifiable net assets		36,200			36,200
Goodwill		14,100			14,100
Total net assets acquired, including goodwill		50,300			50,300
Business combinations, contingent consideration, earn-out liabilities		2,800			2,800
2021 Acquisitions
Acquisition consideration
Cash, net of cash acquired		1,279,100
Shares transferred		181,700
Estimated fair value of contingent consideration		104,900	105,000		104,900
Total consideration		1,565,700
Identifiable assets acquired and liabilities assumed:
Accounts receivable and contract assets		675,200			675,200
Current assets		46,200			46,200
Property and equipment		499,200			499,200
Long-term assets, primarily operating lease right-of-use assets		166,800			166,800
Amortizing intangible assets		608,600			608,600
Accounts payable		(157,300)			(157,300)
Current liabilities, including current portion of operating lease liabilities		(297,900)			(297,900)
Long-term debt, including finance lease obligations		(4,600)			(4,600)
Long-term debt, including finance lease obligations		(224,900)			(224,900)
Total identifiable net assets		1,311,300			1,311,300
Goodwill		258,000			258,000
Total net assets acquired, including goodwill		1,569,300			1,569,300
Bargain purchase gain		(3,600)
Business combinations, contingent consideration, earn-out liabilities		104,900	105,000		104,900
2021 Acquisitions | Power Delivery
Identifiable assets acquired and liabilities assumed:
Bargain purchase gain		(200)			(3,600)
HMG
Acquisition consideration
Cash, net of cash acquired		402,400
Shares transferred		181,700	182,000
Estimated fair value of contingent consideration		0			0
Total consideration		584,100
Identifiable assets acquired and liabilities assumed:
Accounts receivable and contract assets		409,000			409,000
Current assets		19,500			19,500
Property and equipment		248,600			248,600
Long-term assets, primarily operating lease right-of-use assets		84,900			84,900
Amortizing intangible assets		164,400			164,400
Accounts payable		(108,000)			(108,000)
Current liabilities, including current portion of operating lease liabilities		(157,200)			(157,200)
Long-term debt, including finance lease obligations		(200)			(200)
Long-term debt, including finance lease obligations		(148,300)			(148,300)
Total identifiable net assets		512,700			512,700
Goodwill		71,400			71,400
Total net assets acquired, including goodwill		584,100			584,100
Bargain purchase gain		0
Business combinations, contingent consideration, earn-out liabilities		0			0
HMG | Contingent Consideration, Value Of Additional Payments
Acquisition consideration
Estimated fair value of contingent consideration		65,000			65,000
Total consideration	$ 29,400
Identifiable assets acquired and liabilities assumed:
Business combinations, contingent consideration, earn-out liabilities		65,000			65,000
All other
Acquisition consideration
Cash, net of cash acquired		876,700	$ 78,000
Shares transferred		0
Estimated fair value of contingent consideration		104,900			104,900
Total consideration		981,600
Identifiable assets acquired and liabilities assumed:
Accounts receivable and contract assets		266,200			266,200
Current assets		26,700			26,700
Property and equipment		250,600			250,600
Long-term assets, primarily operating lease right-of-use assets		81,900			81,900
Amortizing intangible assets		444,200			444,200
Accounts payable		(49,300)			(49,300)
Current liabilities, including current portion of operating lease liabilities		(140,700)			(140,700)
Long-term debt, including finance lease obligations		(4,400)			(4,400)
Long-term debt, including finance lease obligations		(76,600)			(76,600)
Total identifiable net assets		798,600			798,600
Goodwill		186,600			186,600
Total net assets acquired, including goodwill		985,200			985,200
Bargain purchase gain		(3,600)
Business combinations, contingent consideration, earn-out liabilities		$ 104,900			$ 104,900