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Segments Information - Summary of Revenues by Business Lines (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 4,195,272	$ 3,660,771	$ 3,918,946
Federal Solution Segment
Segment Reporting Information [Line Items]
Revenues	2,212,987	1,888,050	1,911,910
Federal Solution Segment | Defense And Intelligence
Segment Reporting Information [Line Items]
Revenues	1,368,779	1,269,030	1,205,152
Federal Solution Segment | Engineered Systems
Segment Reporting Information [Line Items]
Revenues	844,208	619,020	706,758
Critical Infrastructure
Segment Reporting Information [Line Items]
Revenues	1,982,285	1,772,721	2,007,036
Critical Infrastructure | Mobility Solutions
Segment Reporting Information [Line Items]
Revenues	1,291,088	1,164,718	1,280,535
Critical Infrastructure | Connected Communities
Segment Reporting Information [Line Items]
Revenues	$ 691,197	$ 608,003	$ 726,501

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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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