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Noncontrolling and Redeemable Noncontrolling Interests - Noncontrolling Interests (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Noncontrolling Interest [Line Items] |  |  |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | $ 224 | $ (1,715) |
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest | (793) | 2,543 | $ (634)
Income attributable to noncontrolling interests | 569 | (4,258) |
Nonredeemable Noncontrolling Interest | 459,890 |  | 468,577
Stagwell Global |  |  |
Noncontrolling Interest [Line Items] |  |  |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | 823 | 248 |
Income attributable to noncontrolling interests | (1,616) | (2,295) |
Nonredeemable Noncontrolling Interest | 22,991 |  | 32,362
Stagwell Media |  |  |
Noncontrolling Interest [Line Items] |  |  |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | (1,047) | (1,963) |
Income attributable to noncontrolling interests | 1,047 | $ (1,963) |
Nonredeemable Noncontrolling Interest | $ 436,899 |  | $ 436,215

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