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FINANCIAL INSTRUMENTS (Tables)
 3 Months Ended
Mar. 31, 2023
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:
March 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$279,268 $— $— $279,268 $279,268 $— $— 
Level 2:
Money market instruments300,806 — — 300,806 300,806 — — 
Corporate debt securities427,594 189 (8,333)419,450 — 262,700 156,750 
U.S. government agency securities410,940 411 (2,376)408,975 — 290,059 118,916 
Commercial paper15,325 2 (9)15,318 — 15,318 — 
Asset-backed securities69,314 42 (447)68,909 — 3,940 64,969 
Subtotal1,223,979 644 (11,165)1,213,458 300,806 572,017 340,635 
Total$1,503,247 $644 $(11,165)$1,492,726 $580,074 $572,017 $340,635 
December 31, 2022
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$463,248 $— $— $463,248 $463,248 $— $— 
Level 2:
Money market instruments248,933 — — 248,933 248,933 — — 
Corporate debt securities504,984 34 (11,541)493,477 1,881 299,153 192,443 
U.S. government agency securities312,720 45 (3,771)308,994 — 229,846 79,148 
Commercial paper48,103 11 (22)48,092 10,469 37,623 — 
Asset-backed securities63,151 69 (592)62,628 — 384 62,244 
Subtotal1,177,891 159 (15,926)1,162,124 261,283 567,006 333,835 
Total$1,641,139 $159 $(15,926)$1,625,372 $724,531 $567,006 $333,835 
(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.