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Segment Information - Summary of Revenues by Business Lines (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Revenues	$ 1,554,360	$ 1,535,676
Federal Solution Segment
Segment Reporting Information [Line Items]
Revenues	842,557	909,608
Federal Solution Segment | Defense And Intelligence
Segment Reporting Information [Line Items]
Revenues	443,323	408,388
Federal Solution Segment | Engineered Systems
Segment Reporting Information [Line Items]
Revenues	399,234	501,220
Critical Infrastructure
Segment Reporting Information [Line Items]
Revenues	711,803	626,068
Critical Infrastructure | Infrastructure - North America
Segment Reporting Information [Line Items]
Revenues	444,908	365,282
Critical Infrastructure | Infrastructure - Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Revenues	$ 266,895	$ 260,786

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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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