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Noncontrolling and Redeemable Noncontrolling Interests - Noncontrolling Interests (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Noncontrolling Interest [Line Items] |  |  |
Income attributable to noncontrolling interests | $ 38,573 | $ 14,884 | $ 15,105
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | 30,438 | 15,296 | 18,231
Nonredeemable Noncontrolling Interest | 462,097 | 508,287 |
Stagwell Global |  |  |
Noncontrolling Interest [Line Items] |  |  |
Income attributable to noncontrolling interests | 14,121 |  |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | 5,986 | 9,170 | $ 18,231
Nonredeemable Noncontrolling Interest | 33,691 | 32,914 |
Stagwell Media |  |  |
Noncontrolling Interest [Line Items] |  |  |
Income attributable to noncontrolling interests | 24,452 |  |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | 24,452 | 6,126 |
Nonredeemable Noncontrolling Interest | $ 428,406 | $ 475,373 |

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