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CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 1,622,744 | $ 1,541,584
Gross Unrealized Gains | 6,096 | 1,863
Gross Unrealized Losses | (382) | (2,218)
Fair Value | 1,628,458 | 1,541,229
Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 118,159 | 134,943
Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 1,510,299 | 1,406,286
Money market funds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 94,245 | 132,037
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 94,245 | 132,037
Money market funds | Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 94,245 | 132,037
Money market funds | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
Certificates of deposit |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 26,356 | 55,863
Gross Unrealized Gains | 19 | 58
Gross Unrealized Losses | 0 | (9)
Fair Value | 26,375 | 55,912
Certificates of deposit | Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 750
Certificates of deposit | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 26,375 | 55,162
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 77,139 | 71,427
Gross Unrealized Gains | 101 | 29
Gross Unrealized Losses | (1) | (19)
Fair Value | 77,239 | 71,437
Commercial paper | Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 23,914 | 1,694
Commercial paper | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 53,325 | 69,743
Corporate notes and bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 456,985 | 406,093
Gross Unrealized Gains | 2,807 | 934
Gross Unrealized Losses | (145) | (931)
Fair Value | 459,647 | 406,096
Corporate notes and bonds | Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 462
Corporate notes and bonds | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 459,647 | 405,634
U.S. Treasuries |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 222,450 | 327,773
Gross Unrealized Gains | 151 | 152
Gross Unrealized Losses | (16) | (34)
Fair Value | 222,585 | 327,891
U.S. Treasuries | Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
U.S. Treasuries | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 222,585 | 327,891
U.S. Government agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 745,569 | 548,391
Gross Unrealized Gains | 3,018 | 690
Gross Unrealized Losses | (220) | (1,225)
Fair Value | 748,367 | 547,856
U.S. Government agency securities | Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
U.S. Government agency securities | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | $ 748,367 | $ 547,856

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