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MARKETABLE SECURITIES - Schedule of Cash and Cash Equivalents (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023
--- | --- | --- | ---
Marketable securities |  |  |
Cash and money market | $ 329,357 | $ 530,100 |
Cash equivalents | 18,130 | 75,278 |
Total cash, cash equivalents and restricted cash | 347,487 | 605,378 | $ 421,365
Estimated Fair Value | 320,150 | 243,703 |
Equity securities | 2,586 | 3,841 |
Marketable securities | 304,606 | 172,266 |
Total cash, cash equivalents and marketable securities | 652,093 | 777,644 |
Marketable securities |  |  |
Marketable securities |  |  |
Estimated Fair Value | 302,020 | 168,425 |
Available-for-sale debt securities | $ 302,020 | $ 168,425 |

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