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Investments - Gains and Losses Recognized in Gain (Loss) on Securities, Net (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
(Loss) Gain on Securities [Line Items] |  |
Net Unrealized Gains (Losses) | $ (568) | $ 1,334
Gain (Loss) on Securities, net | 962 | 1,747
Investments | Investments—Consolidated Investment Companies |  |
(Loss) Gain on Securities [Line Items] |  |
Net Unrealized Gains (Losses) | 373 | (7)
Net Realized Gains (Losses) | 507 | (186)
Gain (Loss) on Securities, net | 880 | (193)
Investments | Investments—Affiliates and Other |  |
(Loss) Gain on Securities [Line Items] |  |
Net Unrealized Gains (Losses) | (941) | 1,341
Net Realized Gains (Losses) | 1,023 | 599
Gain (Loss) on Securities, net | $ 82 | $ 1,940

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