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FAIR VALUE MEASUREMENTS - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Assets:    
Marketable securities $ 1,628,458 $ 1,541,229
Certificates of deposit    
Assets:    
Marketable securities 26,375 55,912
Commercial paper    
Assets:    
Marketable securities 77,239 71,437
Corporate notes and bonds    
Assets:    
Marketable securities 459,647 406,096
U.S. Treasuries    
Assets:    
Marketable securities 222,585 327,891
U.S. Government agency securities    
Assets:    
Marketable securities 748,367 547,856
Recurring | Level 1    
Assets:    
Investments in debt securities 0 0
Total assets measured at fair value 94,245 132,037
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:    
Marketable securities 0 0
Recurring | Level 1 | Commercial paper    
Assets:    
Marketable securities 0 0
Recurring | Level 1 | Corporate notes and bonds    
Assets:    
Marketable securities 0 0
Recurring | Level 1 | U.S. Treasuries    
Assets:    
Marketable securities 0 0
Recurring | Level 1 | U.S. Government agency securities    
Assets:    
Marketable securities 0 0
Recurring | Level 1 | Money market funds    
Assets:    
Cash and cash equivalents 94,245 132,037
Recurring | Level 1 | Certificates of deposit    
Assets:    
Cash and cash equivalents 0 0
Recurring | Level 1 | Commercial paper    
Assets:    
Cash and cash equivalents 0 0
Recurring | Level 1 | Corporate notes and bonds    
Assets:    
Cash and cash equivalents 0
Recurring | Level 2    
Assets:    
Investments in debt securities 0 0
Total assets measured at fair value 1,534,213 1,409,192
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:    
Marketable securities 26,375 55,162
Recurring | Level 2 | Commercial paper    
Assets:    
Marketable securities 53,325 69,743
Recurring | Level 2 | Corporate notes and bonds    
Assets:    
Marketable securities 459,647 405,634
Recurring | Level 2 | U.S. Treasuries    
Assets:    
Marketable securities 222,585 327,891
Recurring | Level 2 | U.S. Government agency securities    
Assets:    
Marketable securities 748,367 547,856
Recurring | Level 2 | Money market funds    
Assets:    
Cash and cash equivalents 0 0
Recurring | Level 2 | Certificates of deposit    
Assets:    
Cash and cash equivalents 750
Recurring | Level 2 | Commercial paper    
Assets:    
Cash and cash equivalents 23,914 1,694
Recurring | Level 2 | Corporate notes and bonds    
Assets:    
Cash and cash equivalents 0 462
Recurring | Level 3    
Assets:    
Investments in debt securities 61,137 79,855
Total assets measured at fair value 61,137 79,855
Warranty obligations:    
Current 26,087 28,667
Non-current 130,633 133,126
Total warranty obligations measured at fair value 156,720 161,793
Total liabilities measured at fair value 156,720 161,793
Recurring | Level 3 | Certificates of deposit    
Assets:    
Marketable securities 0 0
Recurring | Level 3 | Commercial paper    
Assets:    
Marketable securities 0 0
Recurring | Level 3 | Corporate notes and bonds    
Assets:    
Marketable securities 0 0
Recurring | Level 3 | U.S. Treasuries    
Assets:    
Marketable securities 0 0
Recurring | Level 3 | U.S. Government agency securities    
Assets:    
Marketable securities 0 0
Recurring | Level 3 | Money market funds    
Assets:    
Cash and cash equivalents 0 0
Recurring | Level 3 | Certificates of deposit    
Assets:    
Cash and cash equivalents 0 0
Recurring | Level 3 | Commercial paper    
Assets:    
Cash and cash equivalents 0 0
Recurring | Level 3 | Corporate notes and bonds    
Assets:    
Cash and cash equivalents $ 0 $ 0