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Goodwill - Summary of Changes in Carrying Value of Goodwill by Reporting Segment (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2023
USD ($)
Goodwill [Line Items]  
Beginning Balance $ 1,661,850
Foreign Exchange 63
Ending Balance 1,661,913
Federal Solutions  
Goodwill [Line Items]  
Beginning Balance 1,591,563
Ending Balance 1,591,563
Critical Infrastructure  
Goodwill [Line Items]  
Beginning Balance 70,287
Foreign Exchange 63
Ending Balance $ 70,350