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FINANCIAL INSTRUMENTS (Tables) | 12 Months Ended
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Dec. 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 as of December 31, 2023 and 2022, respectively:
| December 31, 2023
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Aggregate Fair Value |  | Cash 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 instruments | 499,483 |  |  | — |  |  | — |  |  | 499,483 |  |  | 499,483 |  |  | — |  |  | — |
Corporate debt securities | 587,896 |  |  | 3,476 |  |  | (1,996) |  |  | 589,376 |  |  | — |  |  | 193,251 |  |  | 396,125 |
U.S. government agency securities | 251,952 |  |  | 556 |  |  | (1,140) |  |  | 251,368 |  |  | 19,976 |  |  | 111,343 |  |  | 120,049 |
Commercial paper | 20,076 |  |  | 5 |  |  | — |  |  | 20,081 |  |  | 5,992 |  |  | 14,089 |  |  | — |
Asset-backed securities | 94,744 |  |  | 351 |  |  | (134) |  |  | 94,961 |  |  | — |  |  | — |  |  | 94,961 |
Subtotal | 1,454,151 |  |  | 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 |
| December 31, 2022
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Aggregate Fair Value |  | Cash 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 instruments | 248,933 |  |  | — |  |  | — |  |  | 248,933 |  |  | 248,933 |  |  | — |  |  | — |
Corporate debt securities | 504,984 |  |  | 34 |  |  | (11,541) |  |  | 493,477 |  |  | 1,881 |  |  | 299,153 |  |  | 192,443 |
U.S. government agency securities | 312,720 |  |  | 45 |  |  | (3,771) |  |  | 308,994 |  |  | — |  |  | 229,846 |  |  | 79,148 |
Commercial paper | 48,103 |  |  | 11 |  |  | (22) |  |  | 48,092 |  |  | 10,469 |  |  | 37,623 |  |  | — |
Asset-backed securities | 63,151 |  |  | 69 |  |  | (592) |  |  | 62,628 |  |  | — |  |  | 384 |  |  | 62,244 |
Subtotal | 1,177,891 |  |  | 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.

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