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Contracts with Customers - Summary of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation Of Revenue [Line Items]
Revenues	$ 1,810,116	$ 1,418,571	$ 5,016,259	$ 3,948,523
Fixed-Price
Disaggregation Of Revenue [Line Items]
Revenues	790,820	452,606	2,129,274	1,233,712
Time-and-Materials
Disaggregation Of Revenue [Line Items]
Revenues	354,114	355,689	1,052,040	998,037
Cost-Plus
Disaggregation Of Revenue [Line Items]
Revenues	$ 665,182	$ 610,276	$ 1,834,945	$ 1,716,774

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