v3.26.1
Goodwill and Other Intangible Assets - Summary of Changes in Carrying Amount of Goodwill (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 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         (561)  
Goodwill, Ending Balance 109,020       109,020  
Research Segment [Member]            
Goodwill [Line Items]            
Goodwill, Beginning Balance   112,080     112,080  
Impairment         (10,800)  
Translation adjustments         (522)  
Goodwill, Ending Balance 100,758       100,758  
Consulting Segment [Member]            
Goodwill [Line Items]            
Goodwill, Beginning Balance   $ 8,301     8,301  
Impairment         0  
Translation adjustments         (39)  
Goodwill, Ending Balance $ 8,262       $ 8,262