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Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investments - Investments Measured at Fair Value On A Recurring Basis (Details) - Fair value measurements on recurring basis - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Fair value of marketable securities |  |
Cash and cash equivalents (including restricted) | $ 1,443,318 | $ 2,182,155
Total | 163,634 | 1,153,851
Cash |  |
Fair value of marketable securities |  |
Cash and cash equivalents (including restricted) | 405,271 | 420,971
Cash equivalents |  |
Fair value of marketable securities |  |
Cash and cash equivalents (including restricted) | 1,038,047 | 1,761,184
Commercial paper |  |
Fair value of marketable securities |  |
Total |  | 370,755
Corporate securities |  |
Fair value of marketable securities |  |
Total | 106,994 | 731,195
Other |  |
Fair value of marketable securities |  |
Total | 8,368 | 14,523
Equity securities |  |
Fair value of marketable securities |  |
Equity securities | 48,272 | 37,378
Level 1 |  |
Fair value of marketable securities |  |
Cash and cash equivalents (including restricted) | 691,419 | 828,325
Total | 48,272 | 37,378
Level 1 | Cash |  |
Fair value of marketable securities |  |
Cash and cash equivalents (including restricted) | 405,271 | 420,971
Level 1 | Cash equivalents |  |
Fair value of marketable securities |  |
Cash and cash equivalents (including restricted) | 286,148 | 407,354
Level 1 | Equity securities |  |
Fair value of marketable securities |  |
Equity securities | 48,272 | 37,378
Level 2 |  |
Fair value of marketable securities |  |
Cash and cash equivalents (including restricted) | 751,899 | 1,353,830
Total | 115,311 | 1,116,422
Level 2 | Cash equivalents |  |
Fair value of marketable securities |  |
Cash and cash equivalents (including restricted) | 751,899 | 1,353,830
Level 2 | Commercial paper |  |
Fair value of marketable securities |  |
Total |  | 370,755
Level 2 | Corporate securities |  |
Fair value of marketable securities |  |
Total | 106,994 | 731,195
Level 2 | Other |  |
Fair value of marketable securities |  |
Total | 8,317 | 14,472
Level 3 |  |
Fair value of marketable securities |  |
Total | 51 | 51
Level 3 | Other |  |
Fair value of marketable securities |  |
Total | $ 51 | $ 51

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