Goodwill - Summary of Changes in Carrying Value of Goodwill by Reporting Segment (Details) $ in Thousands	6 Months Ended
Jun. 30, 2022 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 1,412,690
Acquisitions	260,015
Foreign Exchange	(1,037)
Ending Balance	1,671,668
Federal Solutions
Goodwill [Line Items]
Beginning Balance	1,339,117
Acquisitions	260,015
Ending Balance	1,599,132
Critical Infrastructure
Goodwill [Line Items]
Beginning Balance	73,573
Foreign Exchange	(1,037)
Ending Balance	$ 72,536

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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