Investments - Other Investments (Details) - USD ($) $ in Thousands |
Mar. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Schedule of Investments [Line Items] | ||
| Carrying value | $ 61,986 | $ 54,687 |
| % of Total | 57.30% | 56.00% |
| Other investments | $ 108,161 | $ 97,663 |
| % of Total | 100.00% | 100.00% |
| Private equity funds | ||
| Schedule of Investments [Line Items] | ||
| Carrying value | $ 27,608 | $ 23,324 |
| % of Total | 25.50% | 23.90% |
| Private credit funds | ||
| Schedule of Investments [Line Items] | ||
| Carrying value | $ 21,781 | $ 20,863 |
| % of Total | 20.10% | 21.30% |
| Other privately held investments | ||
| Schedule of Investments [Line Items] | ||
| Carrying value | $ 12,597 | $ 10,500 |
| % of Total | 11.70% | 10.80% |
| Investments in direct lending entities (at cost) | ||
| Schedule of Investments [Line Items] | ||
| Other investments | $ 46,175 | $ 42,976 |
| % of Total | 42.70% | 44.00% |