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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Numerator |  |  |
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest | $ 30,626 | $ 25,044 | $ 41,642
Net Income (Loss) Attributable to Noncontrolling Interest | (1,525) | (22,785) | (41,508)
Net Income (Loss) Attributable to Parent | $ 29,101 | $ 2,259 | $ 134
Denominator |  |  |
Basic weighted average number of common shares outstanding (in shares) | 220,608 | 110,890 | 117,259
Diluted weighted average number of common shares outstanding (in shares) | 264,523 | 115,752 | 122,170
Class of Stock [Line Items] |  |  |
Basic (in dollars per share) | $ 0.13 | $ 0.02 | $ 0
Diluted (in dollars per share) | $ (0.08) | $ (0.02) | $ 0
Antidilutive securities excluded from computation of earnings per share (shares) | 3,500 | 3,100 | 2,900
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest | $ 30,626 | $ 25,044 | $ 41,642
Income attributable to noncontrolling interests | 1,525 | 22,785 | 41,508
Net income available to stockholders, diluted | 22,464 |  |
Net Income (Loss) Attributable to Parent | $ 29,101 | $ 2,259 | $ 134
Weighted Average Number of Shares Outstanding, Basic | 220,608 | 110,890 | 117,259
Weighted average number diluted shares outstanding adjustment | 43,915 | 4,862 | 4,911
Diluted weighted average number of common shares outstanding (in shares) | 264,523 | 115,752 | 122,170
Stagwell Media |  |  |
Numerator |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest | $ (6,637) | $ (17,144) | $ (39,066)
Class of Stock [Line Items] |  |  |
Income attributable to noncontrolling interests | 6,637 | 17,144 | 39,066
Stagwell Global |  |  |
Numerator |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest | 8,162 | (5,641) | (2,442)
Class of Stock [Line Items] |  |  |
Income attributable to noncontrolling interests | $ (8,162) | $ 5,641 | $ 2,442
Common Class C |  |  |
Class of Stock [Line Items] |  |  |
Antidilutive securities excluded from computation of earnings per share (shares) |  | 151,649 | 154,972
Weighted average number diluted shares outstanding adjustment | 39,055 |  |
Employee Stock |  |  |
Class of Stock [Line Items] |  |  |
Weighted average number diluted shares outstanding adjustment | 5 | 6 | 5
Class A Shares to settle Deferred Acquisition Obligations |  |  |
Class of Stock [Line Items] |  |  |
Antidilutive securities excluded from computation of earnings per share (shares) | 5,748 | 6,236 | 5,127
Stock Appreciation Rights and Restricted Awards |  |  |
Class of Stock [Line Items] |  |  |
Weighted average number diluted shares outstanding adjustment | 4,855 |  |
Restricted Stock Units (RSUs) |  |  |
Class of Stock [Line Items] |  |  |
Weighted average number diluted shares outstanding adjustment |  | 4,395 | 4,485
Stock Appreciation Rights (SARs) |  |  |
Class of Stock [Line Items] |  |  |
Weighted average number diluted shares outstanding adjustment |  | 461 | 421

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