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FINANCIAL INSTRUMENTS - Summary of Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 876,816 | $ 777,083
Gross unrealized gains | 916 | 16
Gross unrealized losses | (2,840) | (4,781)
Fair Value | 874,892 | 772,318
Short-term restricted cash | 300 | 300
Long-term restricted cash | 2,922 | 2,922
Cash and cash equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 353,837 | 325,144
Gross unrealized gains | 24 | 6
Gross unrealized losses | (27) | (61)
Fair Value | 353,834 | 325,089
Investments: |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 522,979 | 451,939
Gross unrealized gains | 892 | 10
Gross unrealized losses | (2,813) | (4,720)
Fair Value | 521,058 | 447,229
Commercial paper |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 110,009 | 127,626
Gross unrealized gains | 17 | 9
Gross unrealized losses | (153) | (333)
Fair Value | 109,873 | 127,302
Corporate debt securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 87,426 | 49,998
Gross unrealized gains | 299 | 0
Gross unrealized losses | (344) | (507)
Fair Value | 87,381 | 49,491
U.S. government & agency securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 325,544 | 274,315
Gross unrealized gains | 576 | 1
Gross unrealized losses | (2,316) | (3,880)
Fair Value | $ 323,804 | $ 270,436

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