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CASH EQUIVALENTS AND MARKETABLE SECURITIES - Schedule of Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 1,612,464 | $ 1,370,384
Gross Unrealized Gains | 288 | 33
Gross Unrealized Losses | (6,284) | (10,553)
Fair Value | 1,606,468 | 1,359,864
Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 112,659 | 220,265
Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 1,493,809 | 1,139,599
Money market funds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 112,659 | 165,407
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 112,659 | 165,407
Money market funds | Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 112,659 | 165,407
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 | 53,415 | 31,874
Gross Unrealized Gains | 14 | 13
Gross Unrealized Losses | (51) | (130)
Fair Value | 53,378 | 31,757
Certificates of deposit | Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
Certificates of deposit | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 53,378 | 31,757
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 90,886 | 148,832
Gross Unrealized Gains | 0 | 10
Gross Unrealized Losses | (233) | (171)
Fair Value | 90,653 | 148,671
Commercial paper | Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 50,764
Commercial paper | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 90,653 | 97,907
Corporate notes and bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 360,042 | 168,887
Gross Unrealized Gains | 43 | 2
Gross Unrealized Losses | (2,696) | (3,313)
Fair Value | 357,389 | 165,576
Corporate notes and bonds | Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
Corporate notes and bonds | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 357,389 | 165,576
U.S. Treasuries |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 465,322 | 301,349
Gross Unrealized Gains | 22 | 8
Gross Unrealized Losses | (501) | (132)
Fair Value | 464,843 | 301,225
U.S. Treasuries | Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 4,094
U.S. Treasuries | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 464,843 | 297,131
U.S. Government agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 530,140 | 554,035
Gross Unrealized Gains | 209 | 0
Gross Unrealized Losses | (2,803) | (6,807)
Fair Value | 527,546 | 547,228
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 | $ 527,546 | $ 547,228

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