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FINANCIAL INSTRUMENTS (Tables)
 9 Months Ended
Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]  
Schedule of Cash, Cash Equivalents and Available-for-Sale Securities by Significant Investment Category
The following tables show the Company’s cash, cash equivalents and available-for-sale securities by significant investment category for each period presented:
September 30, 2024
Amortized CostGross
Unrealized
Gains		Gross
Unrealized
Losses		Aggregate Fair ValueCash and Cash Equivalents
Short-term
Marketable
Securities (1)
Long-term
Marketable
Securities (2)
Level 1:
Cash$381,781 $— $— $381,781 $381,781 $— $— 
Level 2:
Money market instruments288,687 — — 288,687 288,687 — — 
Corporate debt securities551,545 6,154 (114)557,585 — 178,968 378,617 
U.S. government agency securities172,606 1,372 (49)173,929 4,980 75,134 93,815 
Asset-backed securities89,866 588 (7)90,447 — 894 89,553 
Subtotal1,102,704 8,114 (170)1,110,648 293,667 254,996 561,985 
Total$1,484,485 $8,114 $(170)$1,492,429 $675,448 $254,996 $561,985 
December 31, 2023
Amortized CostGross
Unrealized
Gains		Gross
Unrealized
Losses		Aggregate Fair ValueCash and Cash Equivalents
Short-term
Marketable
Securities (1)
Long-term
Marketable
Securities (2)
Level 1:
Cash$229,676 $— $— $229,676 $229,676 $— $— 
Level 2:
Money market instruments499,483 — — 499,483 499,483 — — 
Corporate debt securities587,896 3,476 (1,996)589,376 — 193,251 396,125 
U.S. government agency securities251,952 556 (1,140)251,368 19,976 111,343 120,049 
Commercial paper20,076 5 — 20,081 5,992 14,089 — 
Asset-backed securities94,744 351 (134)94,961 — — 94,961 
Subtotal1,454,151 4,388 (3,270)1,455,269 525,451 318,683 611,135 
Total$1,683,827 $4,388 $(3,270)$1,684,945 $755,127 $318,683 $611,135 
(1)    The Company’s short-term marketable securities mature in one year or less.
(2)    The Company’s long-term marketable securities mature between one and five years.