MARKETABLE SECURITIES (Amortized Cost and Estimated Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 248,135	$ 247,384
Gross Unrealized Gains	1,023	967
Gross Unrealized Losses	(135)	(711)
Estimated Fair Market Value	249,023	247,640
Investments due in 3 months or less:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,972	10,688
Gross Unrealized Gains	4	0
Gross Unrealized Losses	(3)	(42)
Estimated Fair Market Value	10,973	10,646
Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	87,346	49,398
Gross Unrealized Gains	159	15
Gross Unrealized Losses	(19)	(347)
Estimated Fair Market Value	87,486	49,066
Investments due in 12 months or greater:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	149,817	187,298
Gross Unrealized Gains	860	952
Gross Unrealized Losses	(113)	(322)
Estimated Fair Market Value	150,564	187,928
Commercial paper | Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		718
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Estimated Fair Market Value		718
Corporate securities | Investments due in 3 months or less:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,972	10,688
Gross Unrealized Gains	4	0
Gross Unrealized Losses	(3)	(42)
Estimated Fair Market Value	10,973	10,646
Corporate securities | Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	87,346	48,680
Gross Unrealized Gains	159	15
Gross Unrealized Losses	(19)	(347)
Estimated Fair Market Value	87,486	48,348
Corporate securities | Investments due in 12 months or greater:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	149,817	187,298
Gross Unrealized Gains	860	952
Gross Unrealized Losses	(113)	(322)
Estimated Fair Market Value	$ 150,564	$ 187,928