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MARKETABLE SECURITIES - Available for Sale (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Short-term AFS securities |  |
Amortized cost, short-term AFS securities | $ 367,041 | $ 365,600
Gross unrealized gains, short-term AFS securities | 994 | 926
Gross unrealized losses, short-term AFS securities | (22) | (52)
Fair value, short-term AFS securities | 368,013 | 366,474
Long-term AFS securities |  |
Amortized cost, long-term AFS securities | 477,573 | 345,708
Gross unrealized gains, long-term AFS securities | 1,946 | 802
Gross unrealized losses, long-term AFS securities | (90) | (564)
Fair value, long-term AFS securities | 479,429 | 345,946
Corporate debt securities |  |
Short-term AFS securities |  |
Amortized cost, short-term AFS securities | 191,583 | 153,988
Gross unrealized gains, short-term AFS securities | 531 | 415
Gross unrealized losses, short-term AFS securities | (17) | (28)
Fair value, short-term AFS securities | 192,097 | 154,375
Long-term AFS securities |  |
Amortized cost, long-term AFS securities | 195,984 | 190,772
Gross unrealized gains, long-term AFS securities | 685 | 544
Gross unrealized losses, long-term AFS securities | (46) | (303)
Fair value, long-term AFS securities | 196,623 | 191,013
U.S. Treasury securities |  |
Short-term AFS securities |  |
Amortized cost, short-term AFS securities | 171,058 | 203,238
Gross unrealized gains, short-term AFS securities | 463 | 511
Gross unrealized losses, short-term AFS securities | (5) | (20)
Fair value, short-term AFS securities | 171,516 | 203,729
Long-term AFS securities |  |
Amortized cost, long-term AFS securities | 279,007 | 154,936
Gross unrealized gains, long-term AFS securities | 1,261 | 258
Gross unrealized losses, long-term AFS securities | (41) | (261)
Fair value, long-term AFS securities | 280,227 | 154,933
Certificates of deposit |  |
Short-term AFS securities |  |
Amortized cost, short-term AFS securities | 4,400 | 4,400
Gross unrealized gains, short-term AFS securities | 0 | 0
Gross unrealized losses, short-term AFS securities | 0 | 0
Fair value, short-term AFS securities | 4,400 | 4,400
U.S. governmental agency securities |  |
Short-term AFS securities |  |
Amortized cost, short-term AFS securities |  | 3,974
Gross unrealized gains, short-term AFS securities |  | 0
Gross unrealized losses, short-term AFS securities |  | (4)
Fair value, short-term AFS securities |  | $ 3,970
Long-term AFS securities |  |
Amortized cost, long-term AFS securities | 2,582 |
Gross unrealized gains, long-term AFS securities | 0 |
Gross unrealized losses, long-term AFS securities | (3) |
Fair value, long-term AFS securities | $ 2,579 |

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