v3.25.2
Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Goodwill [Roll Forward]    
Goodwill beginning of period $ 1,226,556  
Foreign currency translation adjustment 16,344  
Goodwill end of period 1,242,900  
Corporate Finance    
Goodwill [Roll Forward]    
Goodwill beginning of period 535,328  
Foreign currency translation adjustment 6,631  
Goodwill end of period 541,959  
Accumulated impairment loss 0 $ 0
FLC    
Goodwill [Roll Forward]    
Goodwill beginning of period 212,367  
Foreign currency translation adjustment 3,221  
Goodwill end of period 215,588  
Accumulated impairment loss 0 0
Economic Consulting    
Goodwill [Roll Forward]    
Goodwill beginning of period 268,294  
Foreign currency translation adjustment 676  
Goodwill end of period 268,970  
Accumulated impairment loss 0 0
Technology    
Goodwill [Roll Forward]    
Goodwill beginning of period 96,784  
Foreign currency translation adjustment 128  
Goodwill end of period 96,912  
Accumulated impairment loss 0 0
Strategic Communications    
Goodwill [Roll Forward]    
Goodwill beginning of period 113,783  
Foreign currency translation adjustment 5,688  
Goodwill end of period 119,471  
Accumulated impairment loss 194,100 194,100
Goodwill $ 313,600 $ 307,900