Investments - Other Investments (Details) - USD ($) $ in Thousands |
Jun. 30, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Schedule of Investments [Line Items] | ||
| Carrying value | $ 51,752 | $ 30,439 |
| % of Total | 58.60% | 45.40% |
| Other investments | $ 88,238 | $ 67,010 |
| % of Total | 100.00% | 100.00% |
| Private equity investments | ||
| Schedule of Investments [Line Items] | ||
| Carrying value | $ 27,544 | $ 23,294 |
| % of Total | 31.20% | 34.80% |
| Private credit lending investments | ||
| Schedule of Investments [Line Items] | ||
| Carrying value | $ 8,451 | $ 1,301 |
| % of Total | 9.60% | 1.90% |
| Investment in limited partnerships | ||
| Schedule of Investments [Line Items] | ||
| Carrying value | $ 13,957 | $ 3,044 |
| % of Total | 15.80% | 4.50% |
| Other investments | ||
| Schedule of Investments [Line Items] | ||
| Carrying value | $ 1,800 | $ 2,800 |
| % of Total | 2.00% | 4.20% |
| Investments in direct lending entities | ||
| Schedule of Investments [Line Items] | ||
| Other investments | $ 36,486 | $ 36,571 |
| % of Total | 41.40% | 54.60% |