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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Numerator |  |  |  |
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest | $ (10,245) | $ 24,519 | $ (15,262) | $ 58,141
Net Income (Loss) Attributable to Noncontrolling Interest | 5,552 | (14,056) | 11,012 | (35,003)
Net Income (Loss) Attributable to Parent | $ (4,693) | 10,463 | $ (4,250) | 23,138
Net income available to stockholders, diluted |  | $ 24,483 |  | $ 54,879
Denominator |  |  |  |
Basic weighted average number of common shares outstanding (in shares) | 115,400 | 126,425 | 120,272 | 124,367
Diluted weighted average number of common shares outstanding (in shares) | 115,400 | 296,414 | 120,272 | 298,843
Class of Stock [Line Items] |  |  |  |
Basic (in dollars per share) | $ (0.04) | $ 0.08 | $ (0.04) | $ 0.19
Diluted (in dollars per share) | $ (0.04) | $ 0.08 | $ (0.04) | $ 0.18
Antidilutive securities excluded from computation of earnings per share (shares) |  |  | 3,700 | 1,000
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest | $ (10,245) | $ 24,519 | $ (15,262) | $ 58,141
Income attributable to noncontrolling interests | (5,552) | 14,056 | (11,012) | 35,003
Net Income (Loss) Attributable to Parent | $ (4,693) | $ 10,463 | $ (4,250) | $ 23,138
Weighted Average Number of Shares Outstanding, Basic | 115,400 | 126,425 | 120,272 | 124,367
Net income available to stockholders, diluted |  | $ 24,483 |  | $ 54,879
Diluted weighted average number of common shares outstanding (in shares) | 115,400 | 296,414 | 120,272 | 298,843
Stagwell Media |  |  |  |
Numerator |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest | $ (4,552) | $ (14,020) | $ (7,717) | $ (31,741)
Class of Stock [Line Items] |  |  |  |
Income attributable to noncontrolling interests | 4,552 | 14,020 | 7,717 | 31,741
Stagwell Global |  |  |  |
Numerator |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest | (1,000) | (36) | (3,295) | (3,262)
Class of Stock [Line Items] |  |  |  |
Income attributable to noncontrolling interests | $ 1,000 | $ 36 | $ 3,295 | $ 3,262
Common Class C |  |  |  |
Class of Stock [Line Items] |  |  |  |
Weighted average number diluted shares outstanding adjustment |  | 164,811 |  | 167,576
Antidilutive securities excluded from computation of earnings per share (shares) | 155,821 |  | 158,351 |
Stock Appreciation Rights (SARs) |  |  |  |
Class of Stock [Line Items] |  |  |  |
Weighted average number diluted shares outstanding adjustment |  | 1,966 |  | 1,941
Restricted Stock Units (RSUs) |  |  |  |
Class of Stock [Line Items] |  |  |  |
Weighted average number diluted shares outstanding adjustment |  | 3,212 |  | 4,959
Common Class A |  |  |  |
Class of Stock [Line Items] |  |  |  |
Weighted average number diluted shares outstanding adjustment |  | 131,603 |  | 131,267
Stock Appreciation Rights and Restricted Awards |  |  |  |
Class of Stock [Line Items] |  |  |  |
Antidilutive securities excluded from computation of earnings per share (shares) | 4,416 |  | 4,736 |
Class A Shares for Instruments with Share Settlement |  |  |  |
Class of Stock [Line Items] |  |  |  |
Antidilutive securities excluded from computation of earnings per share (shares) | 4,719 |  | 4,620 |

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