Variable Interest Entities (VIEs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Variable Interest Entity [Line Items]
Assets, current	$ 3,568,691		$ 3,568,691		$ 3,678,771
Liabilities, current	2,036,570		2,036,570		1,967,527
Revenue	$ 1,060,705	$ 1,070,926	$ 2,858,756	$ 2,884,107
Purple Line Extension Section 2 And Section 3
Variable Interest Entity [Line Items]
Percent interest in the joint venture			75.00%
Newark Airport Terminal One Design Build Project
Variable Interest Entity [Line Items]
Percent interest in the joint venture			80.00%
Related Party | Purple Line Extension Section 2 And Section 3
Variable Interest Entity [Line Items]
Revenue			$ 2,800,000
O&G | Purple Line Extension Section 2 And Section 3
Variable Interest Entity [Line Items]
Noncontrolling interest, ownership percentage by noncontrolling owners	25.00%		25.00%
Joint Venture With Parsons | Newark Airport Terminal One Design Build Project
Variable Interest Entity [Line Items]
Revenue			$ 1,400,000
Parsons Corporation | Newark Airport Terminal One Design Build Project
Variable Interest Entity [Line Items]
Noncontrolling interest, ownership percentage by noncontrolling owners	20.00%		20.00%
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets, current	$ 600		$ 600		400
Liabilities, current	200		200
VIEs
Variable Interest Entity [Line Items]
Assets, current	482,100		482,100		527,300
Liabilities, current	513,100		513,100		567,300
Assets, noncurrent	$ 36,900		$ 36,900		$ 22,400