v3.26.1
Goodwill and Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Goodwill [Roll Forward]    
Goodwill beginning of period $ 1,242,777  
Foreign currency translation adjustment (3,024)  
Goodwill end of period 1,239,753  
Corporate Finance    
Goodwill [Roll Forward]    
Goodwill beginning of period 543,243  
Foreign currency translation adjustment (1,021)  
Goodwill end of period 542,222  
Accumulated impairment loss 0 $ 0
FLC    
Goodwill [Roll Forward]    
Goodwill beginning of period 215,174  
Foreign currency translation adjustment (647)  
Goodwill end of period 214,527  
Accumulated impairment loss 0 0
Economic Consulting    
Goodwill [Roll Forward]    
Goodwill beginning of period 268,920  
Foreign currency translation adjustment (174)  
Goodwill end of period 268,746  
Accumulated impairment loss 0 0
Technology    
Goodwill [Roll Forward]    
Goodwill beginning of period 96,887  
Foreign currency translation adjustment (29)  
Goodwill end of period 96,858  
Accumulated impairment loss 0 0
Strategic Communications    
Goodwill [Roll Forward]    
Goodwill beginning of period 118,553  
Foreign currency translation adjustment (1,153)  
Goodwill end of period 117,400  
Accumulated impairment loss 194,100 194,100
Goodwill $ 311,500 $ 312,700