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Investments (Tables) | 9 Months Ended
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Sep. 30, 2023
Investments [Abstract] |
Summary of investments | The following tables summarize our investments as of September 30, 2023 and December 31, 2022 (in thousands):
| September 30, 2023
| Cost |  | Unrealized Gains |  | Unrealized Losses |  | Carrying Amount
Publicly traded companies | $ | 197,822 |  |  | $ | 41,225 |  |  | $ | (109,461) |  |  | $ | 129,586 |
Entities that report NAV | 492,151 |  |  | 191,378 |  |  | (24,740) |  |  | 658,789 |
Entities that do not report NAV: |  |  |  |  |  |  |
Entities with observable price changes | 104,105 |  |  | 78,845 |  |  | (1,224) |  |  | 181,726 |
Entities without observable price changes | 387,755 |  |  | — |  |  | — |  |  | 387,755 |
Investments accounted for under the equity method | N/A |  | N/A |  | N/A |  | 73,910 |
Total investments | $ | 1,181,833 |  |  | $ | 311,448 |  |  | $ | (135,425) |  |  | $ | 1,431,766 |
| December 31, 2022
| Cost |  | Unrealized Gains |  | Unrealized Losses |  | Carrying Amount
Publicly traded companies | $ | 210,986 |  |  | $ | 96,271 |  |  | $ | (100,118) |  |  | $ | 207,139 |
Entities that report NAV | 452,391 |  |  | 315,071 |  |  | (7,710) |  |  | 759,752 |
Entities that do not report NAV: |  |  |  |  |  |  |
Entities with observable price changes | 100,296 |  |  | 95,062 |  |  | (1,574) |  |  | 193,784 |
Entities without observable price changes | 388,940 |  |  | — |  |  | — |  |  | 388,940 |
Investments accounted for under the equity method | N/A |  | N/A |  | N/A |  | 65,459 |
Total investments | $ | 1,152,613 |  |  | $ | 506,404 |  |  | $ | (109,402) |  |  | $ | 1,615,074 |
Schedule of net investment income | Our investment loss for the three and nine months ended September 30, 2023 and 2022 consisted of the following (in thousands):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
Realized (losses) gains |  | $ | (3,470) |  | (1) | $ | 24,210 |  |  | $ | 16,903 |  | (1) | $ | 75,971 |
Unrealized losses |  | (77,202) |  |  | (56,515) |  |  | (220,954) |  |  | (388,076) |
Investment loss |  | $ | (80,672) |  |  | $ | (32,305) |  |  | $ | (204,051) |  |  | $ | (312,105) |
(1)Consists of realized gains of $25.0 million and $68.4 million, offset by impairment charges of $28.5 million and $51.5 million during the three and nine months ended September 30, 2023, respectively.

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