Segment Information - Summary of Revenues by Business Lines (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Revenues	$ 1,491,176	$ 1,554,360
Federal Solution Segment
Segment Reporting Information [Line Items]
Revenues	758,348	842,557
Federal Solution Segment \| Defense And Intelligence
Segment Reporting Information [Line Items]
Revenues	503,747	443,323
Federal Solution Segment \| Engineered Systems
Segment Reporting Information [Line Items]
Revenues	254,601	399,234
Critical Infrastructure
Segment Reporting Information [Line Items]
Revenues	732,828	711,803
Critical Infrastructure \| Infrastructure - North America
Segment Reporting Information [Line Items]
Revenues	458,412	444,908
Critical Infrastructure \| Infrastructure - Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Revenues	$ 274,416	$ 266,895

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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+ Details