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Contracts with Customers - Summary of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation Of Revenue [Line Items]
Revenues	$ 1,621,748	$ 1,810,116	$ 4,760,431	$ 5,016,259
Fixed-Price
Disaggregation Of Revenue [Line Items]
Revenues	535,901	790,820	1,642,609	2,129,274
Time-and-Materials
Disaggregation Of Revenue [Line Items]
Revenues	394,076	354,114	1,114,111	1,052,040
Cost-Plus
Disaggregation Of Revenue [Line Items]
Revenues	$ 691,771	$ 665,182	$ 2,003,711	$ 1,834,945

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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