v3.26.3
Goodwill and Other Intangible Assets - Summary of Changes in Carrying Amount of Goodwill (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Goodwill [Line Items]            
Goodwill, Beginning Balance   $ 120,381     $ 120,381  
Impairment $ 0 (10,800) $ 0 $ (83,900) (10,800) $ (83,895)
Translation adjustments         (637)  
Goodwill, Ending Balance 108,944       108,944  
Research Segment [Member]            
Goodwill [Line Items]            
Goodwill, Beginning Balance   112,080     112,080  
Impairment         (10,800)  
Translation adjustments         (593)  
Goodwill, Ending Balance 100,687       100,687  
Consulting Segment [Member]            
Goodwill [Line Items]            
Goodwill, Beginning Balance   $ 8,301     8,301  
Impairment         0  
Translation adjustments         (44)  
Goodwill, Ending Balance $ 8,257       $ 8,257