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