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Acquisitions - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
May 31, 2022
Jul. 30, 2021
Jul. 06, 2021
Nov. 19, 2020
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Business Acquisition [Line Items]              
Amortization of intangible assets         $ 78,200 $ 103,200 $ 87,800
Revenues         4,195,272 3,660,771 3,918,946
Goodwill         1,661,850 1,412,690 1,261,978
Xator Corporation              
Business Acquisition [Line Items]              
Percentage of ownership interest acquired 100.00%            
Cash paid to acquire $ 388,300            
Borrowed under credit agreement to partially fund the acquisition 300,000            
Amortization of intangible assets         11,900    
Revenues         157,800    
Goodwill $ 253,190            
Xator Corporation | Selling, General and Administrative Expense              
Business Acquisition [Line Items]              
Acquisition related expenses           7,700  
BlackHorse Solutions, Inc.              
Business Acquisition [Line Items]              
Percentage of ownership interest acquired     100.00%        
Cash paid to acquire     $ 205,000        
Amortization of intangible assets         14,000 5,400  
Revenues           35,300  
Goodwill     143,086        
Goodwill deductible for tax purposes     $ 10,600        
BlackHorse Solutions, Inc. | Selling, General and Administrative Expense              
Business Acquisition [Line Items]              
Acquisition related expenses           3,100  
Echo Ridge LLC              
Business Acquisition [Line Items]              
Percentage of ownership interest acquired   100.00%          
Cash paid to acquire   $ 9,000          
Revenues           2,900  
Goodwill   $ 7,200          
Echo Ridge LLC | Selling, General and Administrative Expense              
Business Acquisition [Line Items]              
Acquisition related expenses           300  
Braxton Science & Technology Group              
Business Acquisition [Line Items]              
Percentage of ownership interest acquired       100.00%      
Cash paid to acquire       $ 310,900      
Amortization of intangible assets         $ 16,100 $ 16,200  
Revenues             10,100
Goodwill       212,185      
Goodwill deductible for tax purposes       $ 200,500      
Braxton Science & Technology Group | Selling, General and Administrative Expense              
Business Acquisition [Line Items]              
Acquisition related expenses             $ 5,500