v3.26.1
Noncontrolling and Redeemable Noncontrolling Interests - Noncontrolling Interests (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Apr. 04, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Noncontrolling Interest [Line Items]            
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest   $ 718 $ 624 $ (338) $ (6,011)  
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest   (1,303) 3 (1,897) 4,230 $ (7,246)
Income attributable to noncontrolling interests   (585) 627 (1,559) (1,781)  
Common Class C            
Noncontrolling Interest [Line Items]            
Conversion of Stock, Shares Converted 151,648,741          
Stagwell Global            
Noncontrolling Interest [Line Items]            
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest   718 624 338 626  
Income attributable to noncontrolling interests     627   4,856  
Stagwell Media            
Noncontrolling Interest [Line Items]            
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest   $ 0 $ 0 $ 0 (6,637)  
Income attributable to noncontrolling interests         $ (6,637)