Investments - Gains and Losses Recognized in Gain (Loss) on Securities, Net (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| (Loss) Gain on Securities [Line Items] | ||||
| Net Unrealized Gains (Losses) | $ 7,316 | $ 8,943 | ||
| Gain (Loss) on Securities, net | $ 10,605 | $ 11,213 | 11,019 | 12,175 |
| Investments | Investments—Consolidated Investment Companies | ||||
| (Loss) Gain on Securities [Line Items] | ||||
| Net Unrealized Gains (Losses) | 2,514 | 6,380 | 2,227 | 6,753 |
| Net Realized Gains (Losses) | 606 | 1,445 | 910 | 1,951 |
| Gain (Loss) on Securities, net | 3,120 | 7,825 | 3,137 | 8,704 |
| Investments | Investments—Affiliates and Other | ||||
| (Loss) Gain on Securities [Line Items] | ||||
| Net Unrealized Gains (Losses) | 6,663 | 3,131 | 5,089 | 2,190 |
| Net Realized Gains (Losses) | 822 | 257 | 2,793 | 1,281 |
| Gain (Loss) on Securities, net | $ 7,485 | $ 3,388 | $ 7,882 | $ 3,471 |