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Equity and Other Investments and Fair Value Measurements - Reconciliation of Equity and Long-Term Investments Balances (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Fair Value Disclosures [Abstract] |  |  |  |  |
Equity and long-term investments |  |  | $ 341,664 | $ 444,432 | $ 444,432
Purchases of trading securities |  |  | 34,674 |  | 63,201
Proceeds from trading securities |  |  | (5,097) |  |
Net sales and purchases of investments managed by ISP Fund |  |  | (28,025) |  |
Changes in fair value, net | $ 11,280 | $ (30,556) | (54,019) | $ (43,891) | (59,161)
Reclassification of current portion |  |  | 7,334 |  | (107,532)
Other |  |  | 753 |  | 724
Equity and long-term investments | $ 297,284 |  | $ 297,284 |  | $ 341,664

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