Acquisitions, Goodwill and Other Intangible Assets, Net - 2021 Acquisitions (Details) $ in Thousands	1 Months Ended		3 Months Ended	12 Months Ended			24 Months Ended
	May 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) yr shares	Jun. 30, 2022 USD ($) shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) yr acquisition shares	Dec. 31, 2020 USD ($)	Dec. 31, 2022 USD ($)
Business Combinations [Line Items]
Goodwill		$ 1,520,575		$ 2,045,041	$ 1,520,575	$ 1,243,000	$ 2,045,041
Decrease in contingent consideration				(1,682)	0	0
Cash, net of cash acquired				635,763	1,244,603	24,971
Power Delivery
Business Combinations [Line Items]
Goodwill		303,400		270,100	$ 303,400	$ 150,100	270,100
2021 Acquisitions
Business Combinations [Line Items]
Business combinations, number of acquisitions | acquisition					14
Amortizing intangible assets				608,600			608,600
Goodwill				258,000			258,000
Business combinations, goodwill, expected tax deductible amount				164,000			164,000
Bargain purchase gain				(3,600)
Total consideration				1,565,700
Cash, net of cash acquired				1,279,100
Business combinations, contingent consideration, earn-out liabilities		$ 105,000		104,900	$ 105,000		104,900
Shares transferred				181,700
Business combinations, contingent consideration liabilities, range of potential undiscounted earn-out liabilities, low				18,000			18,000
Business combinations, contingent consideration liabilities, range of potential undiscounted earn-out liabilities, high				118,000			118,000
2021 Acquisitions | Minimum | Expected Term
Business Combinations [Line Items]
Business combinations, contingent consideration, earn-out period (in years) | yr		1			1
2021 Acquisitions | Maximum | Expected Term
Business Combinations [Line Items]
Business combinations, contingent consideration, earn-out period (in years) | yr		5			5
2021 Acquisitions | Power Delivery
Business Combinations [Line Items]
Bargain purchase gain				(200)			(3,600)
HMG
Business Combinations [Line Items]
Amortizing intangible assets				164,400			164,400
Business combinations, acquired finite-lived intangible assets, weighted average lives (in years)					11 years
Goodwill				71,400			71,400
Bargain purchase gain				0
Total consideration				584,100
Business acquisition, number of shares issued (in shares) | shares		1,975,000	133,000		2,000,000
Cash, net of cash acquired				402,400
Business combinations, contingent consideration, earn-out liabilities				0			0
Shares transferred				181,700	$ 182,000
HMG | Contingent Consideration, Value Of Additional Payments
Business Combinations [Line Items]
Total consideration	$ 29,400
Payments to acquire businesses, gross	$ 18,000
Business acquisition, number of shares issued (in shares) | shares	133,157
Business combinations, contingent consideration, realized gain (loss)				1,000
Decrease in contingent consideration			$ 15,000
Business combination, contingent consideration, current				37,000			37,000
Business combinations, contingent consideration, earn-out liabilities				$ 65,000			65,000
HMG | Contingent Consideration, Collections From Acquired Receivables
Business Combinations [Line Items]
Business acquisition, number of shares issued (in shares) | shares				98,800
Contingent consideration, unrealized gain (loss)				$ 8,400
Business combinations, contingent consideration, earn-out liabilities				$ 21,800			21,800
HMG | Power Delivery | Contingent Consideration, Value Of Additional Payments
Business Combinations [Line Items]
Business acquisition, number of shares issued (in shares) | shares				170,000
Contingent consideration, unrealized gain (loss)				$ 1,200
HMG | Customer Relationships
Business Combinations [Line Items]
Amortizing intangible assets		$ 132,000			$ 132,000
Business combinations, acquired finite-lived intangible assets, weighted average lives (in years)					12 years
All other
Business Combinations [Line Items]
Amortizing intangible assets				444,200			444,200
Business combinations, acquired finite-lived intangible assets, weighted average lives (in years)					17 years
Goodwill				186,600			186,600
Bargain purchase gain				(3,600)
Total consideration				981,600
Cash, net of cash acquired				876,700	$ 78,000
Business combinations, contingent consideration, earn-out liabilities				104,900			$ 104,900
Shares transferred				$ 0
All other | Power Delivery | Minimum | Expected Term
Business Combinations [Line Items]
Business combinations, contingent consideration, earn-out period (in years) | yr		1			1
All other | Customer Relationships
Business Combinations [Line Items]
Business combinations, acquired finite-lived intangible assets, weighted average lives (in years)					17 years
All other | Trade Names
Business Combinations [Line Items]
Business combinations, acquired finite-lived intangible assets, weighted average lives (in years)					17 years
All other, INTREN acquisition | Power Delivery
Business Combinations [Line Items]
Goodwill		$ 49,000			$ 49,000
Total consideration					455,000
All other, INTREN acquisition | Customer Relationships And Trade Names | Power Delivery
Business Combinations [Line Items]
Amortizing intangible assets		$ 281,000			$ 281,000
Business combinations, acquired finite-lived intangible assets, weighted average lives (in years)					20 years