Segment Information - Summary of Revenues by Business Lines (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 1,535,676	$ 1,173,466
Federal Solution Segment
Segment Reporting Information [Line Items]
Revenues	909,608	634,546
Federal Solution Segment | Defense And Intelligence
Segment Reporting Information [Line Items]
Revenues	408,388	364,360
Federal Solution Segment | Engineered Systems
Segment Reporting Information [Line Items]
Revenues	501,220	270,186
Critical Infrastructure
Segment Reporting Information [Line Items]
Revenues	626,068	538,920
Critical Infrastructure | Infrastructure-North America
Segment Reporting Information [Line Items]
Revenues	365,282	319,559
Critical Infrastructure | Infrastructure - Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Revenues	$ 260,786	$ 219,361