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Revenue Recognition and Related Balance Sheet Accounts - Additional Information (Details) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2021 USD ($) unit numberOfProjects	Jun. 30, 2021 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2021 USD ($) unit numberOfProjects	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Revenue Recognition [Line Items]
Revenues recognized related to change orders and claims	$ 367,800			$ 367,800	$ 141,200
Number of delayed transmission projects due to changes orders and claims | numberOfProjects	2			2
Number of projects that experienced a significant impact due accelerated timeline | unit	1			1
Change in contract estimates, (favorable) unfavorable impact on operating results, percent					5.00%	5.00%
Percent of total revenues recognized associated with revenue recognition method				45.90%	47.90%	50.00%
Change in contract estimates, favorable (unfavorable) impact on revenues				$ 130,200	$ 27,000	$ 60,200
Revenue recognized related to amounts in contract liabilities outstanding at the beginning of period				433,300	491,500	370,000
Stockholders' equity	$ 5,116,921			5,116,921	4,348,972	4,053,831	$ 3,605,453
Allowances for doubtful accounts on current receivables	49,749			49,749	16,546
Deferred income taxes	(191,098)			(191,098)	(166,407)
Provision for credit losses				34,890	3,656	11,249
Current retainage balances	406,700			406,700	306,300
Non-current retainage balances	93,900			93,900	88,200
Unbilled receivables	679,000			679,000	472,300	524,300
Limetree Bay Refining, LLC
Revenue Recognition [Line Items]
Accounts receivable, before allowance for credit loss	31,300			31,300
Limetree Bay Terminals, LLC
Revenue Recognition [Line Items]
Accounts receivable, before allowance for credit loss	400			400
Limetree Bay Refining, LLC And Limetree Bay Terminals, LLC
Revenue Recognition [Line Items]
Provision for credit losses	8,100	$ 23,600
Retained Earnings
Revenue Recognition [Line Items]
Stockholders' equity	3,714,843			3,714,843	3,264,967	2,854,271	$ 2,477,291
Cumulative Effect, Period of Adoption, Adjustment
Revenue Recognition [Line Items]
Stockholders' equity						(3,841)
Allowances for doubtful accounts on current receivables						5,100
Deferred income taxes						1,300
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings
Revenue Recognition [Line Items]
Stockholders' equity						(3,841)
Accounts payable and accrued expenses
Revenue Recognition [Line Items]
Unearned revenues	$ 51,800			$ 51,800	53,600	33,200
Two Larger Pipleline Projects - Canada
Revenue Recognition [Line Items]
Change in contract estimates, (favorable) unfavorable impact on operating results, amount					10,000
Larger Electric Transmission Project
Revenue Recognition [Line Items]
Change in contract estimates, (favorable) unfavorable impact on operating results, amount					(20,800)
Several Projects
Revenue Recognition [Line Items]
Change in contract estimates, (favorable) unfavorable impact on operating results, amount					$ 35,500
EPC Electric Transmission Project
Revenue Recognition [Line Items]
Change in contract estimates, (favorable) unfavorable impact on operating results, amount			$ (30,100)
Larger Pipeline Transmission Project
Revenue Recognition [Line Items]
Change in contract estimates, (favorable) unfavorable impact on operating results, amount						(22,900)
Larger Natural Gas Transmission Project
Revenue Recognition [Line Items]
Change in contract estimates, (favorable) unfavorable impact on operating results, amount						(16,200)
Electric Transmission Project - Southern California
Revenue Recognition [Line Items]
Change in contract estimates, (favorable) unfavorable impact on operating results, amount						21,100
Percentage of project completion	99.00%			99.00%
Peru Telecommunications Project | Correction of Total Estimated Project Costs | Restatement Adjustment
Revenue Recognition [Line Items]
Change in contract estimates, (favorable) unfavorable impact on operating results, amount						9,600
Processing Facility Project
Revenue Recognition [Line Items]
Change in contract estimates, (favorable) unfavorable impact on operating results, amount						$ 29,400
Projects In Progress
Revenue Recognition [Line Items]
Change in contract estimates, (favorable) unfavorable impact on operating results, amount				$ (111,500)
Change in contract estimates, (favorable) unfavorable impact on operating results, percent				(5.70%)

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