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FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Assets [Abstract] |  |
Marketable securities: | $ 1,606,468 | $ 1,359,864
Certificates of deposit |  |
Assets [Abstract] |  |
Marketable securities: | 53,378 | 31,757
Commercial paper |  |
Assets [Abstract] |  |
Marketable securities: | 90,653 | 148,671
Corporate notes and bonds |  |
Assets [Abstract] |  |
Marketable securities: | 357,389 | 165,576
U.S. Treasuries |  |
Assets [Abstract] |  |
Marketable securities: | 464,843 | 301,225
U.S. Government agency securities |  |
Assets [Abstract] |  |
Marketable securities: | 527,546 | 547,228
Recurring | Level 1 |  |
Assets [Abstract] |  |
Investments in debt securities | 0 | 0
Total assets measured at fair value | 112,659 | 165,407
Warranty obligations |  |
Current | 0 | 0
Non-current | 0 | 0
Total warranty obligations measured at fair value | 0 | 0
Total liabilities measured at fair value | 0 | 0
Recurring | Level 1 | Certificates of deposit |  |
Assets [Abstract] |  |
Marketable securities: | 0 | 0
Recurring | Level 1 | Commercial paper |  |
Assets [Abstract] |  |
Marketable securities: | 0 | 0
Recurring | Level 1 | Corporate notes and bonds |  |
Assets [Abstract] |  |
Marketable securities: | 0 | 0
Recurring | Level 1 | U.S. Treasuries |  |
Assets [Abstract] |  |
Marketable securities: | 0 | 0
Recurring | Level 1 | U.S. Government agency securities |  |
Assets [Abstract] |  |
Marketable securities: | 0 | 0
Recurring | Level 1 | Money market funds |  |
Assets [Abstract] |  |
Cash and cash equivalents | 112,659 | 165,407
Recurring | Level 1 | Commercial paper |  |
Assets [Abstract] |  |
Cash and cash equivalents | 0 | 0
Recurring | Level 1 | U.S. Treasuries |  |
Assets [Abstract] |  |
Cash and cash equivalents | 0 | 0
Recurring | Level 2 |  |
Assets [Abstract] |  |
Investments in debt securities | 0 | 0
Total assets measured at fair value | 1,493,809 | 1,194,457
Warranty obligations |  |
Current | 0 | 0
Non-current | 0 | 0
Total warranty obligations measured at fair value | 0 | 0
Total liabilities measured at fair value | 0 | 0
Recurring | Level 2 | Certificates of deposit |  |
Assets [Abstract] |  |
Marketable securities: | 53,378 | 31,757
Recurring | Level 2 | Commercial paper |  |
Assets [Abstract] |  |
Marketable securities: | 90,653 | 97,907
Recurring | Level 2 | Corporate notes and bonds |  |
Assets [Abstract] |  |
Marketable securities: | 357,389 | 165,576
Recurring | Level 2 | U.S. Treasuries |  |
Assets [Abstract] |  |
Marketable securities: | 464,843 | 297,131
Recurring | Level 2 | U.S. Government agency securities |  |
Assets [Abstract] |  |
Marketable securities: | 527,546 | 547,228
Recurring | Level 2 | Money market funds |  |
Assets [Abstract] |  |
Cash and cash equivalents | 0 | 0
Recurring | Level 2 | Commercial paper |  |
Assets [Abstract] |  |
Cash and cash equivalents | 0 | 50,764
Recurring | Level 2 | U.S. Treasuries |  |
Assets [Abstract] |  |
Cash and cash equivalents | 0 | 4,094
Recurring | Level 3 |  |
Assets [Abstract] |  |
Investments in debt securities | 77,185 | 56,777
Total assets measured at fair value | 77,185 | 56,777
Warranty obligations |  |
Current | 31,693 | 30,740
Non-current | 127,197 | 75,749
Total warranty obligations measured at fair value | 158,890 | 106,489
Total liabilities measured at fair value | 158,890 | 106,489
Recurring | Level 3 | Certificates of deposit |  |
Assets [Abstract] |  |
Marketable securities: | 0 | 0
Recurring | Level 3 | Commercial paper |  |
Assets [Abstract] |  |
Marketable securities: | 0 | 0
Recurring | Level 3 | Corporate notes and bonds |  |
Assets [Abstract] |  |
Marketable securities: | 0 | 0
Recurring | Level 3 | U.S. Treasuries |  |
Assets [Abstract] |  |
Marketable securities: | 0 | 0
Recurring | Level 3 | U.S. Government agency securities |  |
Assets [Abstract] |  |
Marketable securities: | 0 | 0
Recurring | Level 3 | Money market funds |  |
Assets [Abstract] |  |
Cash and cash equivalents | 0 | 0
Recurring | Level 3 | Commercial paper |  |
Assets [Abstract] |  |
Cash and cash equivalents | 0 | 0
Recurring | Level 3 | U.S. Treasuries |  |
Assets [Abstract] |  |
Cash and cash equivalents | $ 0 | $ 0

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