MARKETABLE SECURITIES - Available for Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Short-term AFS securities
Amortized cost, short-term AFS securities	$ 428,134	$ 385,611
Gross unrealized gains, short-term AFS securities	275	1,111
Gross unrealized losses, short-term AFS securities	(254)	(10)
Fair value, short-term AFS securities	428,155	386,712
Long-term AFS securities
Amortized cost, long-term AFS securities	558,374	523,640
Gross unrealized gains, long-term AFS securities	37	2,101
Gross unrealized losses, long-term AFS securities	(2,914)	(46)
Fair value, long-term AFS securities	555,497	525,695
U.S. Treasury securities
Short-term AFS securities
Amortized cost, short-term AFS securities	242,529	200,604
Gross unrealized gains, short-term AFS securities	150	660
Gross unrealized losses, short-term AFS securities	(162)	(1)
Fair value, short-term AFS securities	242,517	201,263
Long-term AFS securities
Amortized cost, long-term AFS securities	280,636	289,530
Gross unrealized gains, long-term AFS securities	0	1,372
Gross unrealized losses, long-term AFS securities	(1,697)	(3)
Fair value, long-term AFS securities	278,939	290,899
Corporate debt securities
Short-term AFS securities
Amortized cost, short-term AFS securities	185,605	185,007
Gross unrealized gains, short-term AFS securities	125	451
Gross unrealized losses, short-term AFS securities	(92)	(9)
Fair value, short-term AFS securities	185,638	185,449
Long-term AFS securities
Amortized cost, long-term AFS securities	270,860	227,235
Gross unrealized gains, long-term AFS securities	37	724
Gross unrealized losses, long-term AFS securities	(1,169)	(43)
Fair value, long-term AFS securities	269,728	227,916
U.S. governmental agency securities
Long-term AFS securities
Amortized cost, long-term AFS securities	6,878	6,875
Gross unrealized gains, long-term AFS securities	0	5
Gross unrealized losses, long-term AFS securities	(48)	0
Fair value, long-term AFS securities	$ 6,830	$ 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
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