MARKETABLE SECURITIES - Available for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Short-term AFS securities
Amortized cost, short-term AFS securities	$ 407,242	$ 385,611
Gross unrealized gains, short-term AFS securities	648	1,111
Gross unrealized losses, short-term AFS securities	(100)	(10)
Fair value, short-term AFS securities	407,790	386,712
Long-term AFS securities
Amortized cost, long-term AFS securities	513,835	523,640
Gross unrealized gains, long-term AFS securities	310	2,101
Gross unrealized losses, long-term AFS securities	(1,479)	(46)
Fair value, long-term AFS securities	512,666	525,695
U.S. Treasury securities
Short-term AFS securities
Amortized cost, short-term AFS securities	225,581	200,604
Gross unrealized gains, short-term AFS securities	435	660
Gross unrealized losses, short-term AFS securities	(37)	(1)
Fair value, short-term AFS securities	225,979	201,263
Long-term AFS securities
Amortized cost, long-term AFS securities	279,132	289,530
Gross unrealized gains, long-term AFS securities	199	1,372
Gross unrealized losses, long-term AFS securities	(654)	(3)
Fair value, long-term AFS securities	278,677	290,899
Corporate debt securities
Short-term AFS securities
Amortized cost, short-term AFS securities	181,661	185,007
Gross unrealized gains, short-term AFS securities	213	451
Gross unrealized losses, short-term AFS securities	(63)	(9)
Fair value, short-term AFS securities	181,811	185,449
Long-term AFS securities
Amortized cost, long-term AFS securities	227,827	227,235
Gross unrealized gains, long-term AFS securities	111	724
Gross unrealized losses, long-term AFS securities	(798)	(43)
Fair value, long-term AFS securities	227,140	227,916
U.S. governmental agency securities
Long-term AFS securities
Amortized cost, long-term AFS securities	6,876	6,875
Gross unrealized gains, long-term AFS securities	0	5
Gross unrealized losses, long-term AFS securities	(27)	0
Fair value, long-term AFS securities	$ 6,849	$ 6,880

Debt Securities, Available-for-sale Securities, Current

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Debt Securities, Available-for-sale, Gross Unrealized Gains, Current

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
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