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CONSOLIDATED ENTITIES - ISP Fund LP (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Dec. 11, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
CONSOLIDATED ENTITIES |  |  |  |
Total assets |  | $ 999,570 | $ 724,826 |
Initial contribution |  | 387,981 | 0 | $ 0
Unrealized loss on equity investments |  | 50,277 | $ 0 | $ 0
ISP Fund LP |  |  |  |
CONSOLIDATED ENTITIES |  |  |  |
Total assets |  | $ 299,300 |  |
Economic interest (in percent) |  | 100.00% |  |
Net investment-related expense |  | $ 400 |  |
Unrealized loss on equity investments |  | $ 400 |  |
Contributed to partnership for investing | $ 300,000 |  |  |
Lock-up period | 36 months |  |  |
ISP Fund LP | General Partner |  |  |  |
CONSOLIDATED ENTITIES |  |  |  |
Percentage of annual performance allocation based on net profits | 10.00% |  |  |

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