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INVESTMENTS IN DEBT SECURITIES - Short-Term and Long-Term Investments (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 626,241 |
Fair Value | 628,455 |
Short-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 354,234 | $ 402,814
Gross Unrealized Gains | 616 | 713
Gross Unrealized Losses | (9) | (101)
Fair Value | 354,841 | 403,426
Long-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 272,007 | 470,808
Gross Unrealized Gains | 1,821 | 1,938
Gross Unrealized Losses | (214) | (769)
Fair Value | 273,614 | 471,977
U.S. agency securities | Short-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 31,999 | 34,454
Gross Unrealized Gains | 1 | 15
Gross Unrealized Losses | (4) | (1)
Fair Value | 31,996 | 34,468
U.S. agency securities | Long-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 39,017 | 49,017
Gross Unrealized Gains | 64 | 23
Gross Unrealized Losses | 0 | (10)
Fair Value | 39,081 | 49,030
Corporate bonds | Short-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 99,096 | 160,238
Gross Unrealized Gains | 191 | 248
Gross Unrealized Losses | (4) | (96)
Fair Value | 99,283 | 160,390
Corporate bonds | Long-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 72,364 | 195,035
Gross Unrealized Gains | 340 | 693
Gross Unrealized Losses | (27) | (384)
Fair Value | 72,677 | 195,344
Commercial paper | Short-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 585 | 333
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 585 | 333
Municipal securities | Short-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 305 | 398
Gross Unrealized Gains | 0 | 1
Gross Unrealized Losses | 0 | 0
Fair Value | 305 | 399
Municipal securities | Long-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 4,445 | 4,592
Gross Unrealized Gains | 29 | 4
Gross Unrealized Losses | (161) | (251)
Fair Value | 4,313 | 4,345
Certificates of deposit | Short-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,188 | 1,051
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 1,188 | 1,051
U.S. government securities | Short-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 221,061 | 206,340
Gross Unrealized Gains | 424 | 449
Gross Unrealized Losses | (1) | (4)
Fair Value | 221,484 | 206,785
U.S. government securities | Long-term debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 156,181 | 222,164
Gross Unrealized Gains | 1,388 | 1,218
Gross Unrealized Losses | (26) | (124)
Fair Value | $ 157,543 | $ 223,258

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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