SHORT-TERM INVESTMENTS (Details) $ in Thousands	3 Months Ended
Mar. 31, 2023 USD ($) position	Dec. 31, 2022 USD ($) position
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 957,554	$ 905,346
Unrealized Gains	176	258
Unrealized Losses	(146)	(454)
Fair Value	957,584	$ 905,150
Realized gains or losses on investments	$ 0
Loss position, less than 12 months \| position	17	12
Loss position, greater than 12 months \| position	0	0
Allowance for credit loss	$ 0	$ 0
U.S. treasury bills (due within 1 year)
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	9,904	63,971
Unrealized Gains	6
Unrealized Losses		(164)
Fair Value	9,910	63,807
U.S. agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	207,370	14,733
Unrealized Gains	121	11
Fair Value	207,491	14,744
Commercial paper (due within 1 year)
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	728,286	814,772
Unrealized Gains	46	247
Unrealized Losses	(146)	(287)
Fair Value	728,186	814,732
Corporate notes (due within 1 year)
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	11,994	11,870
Unrealized Gains	3
Unrealized Losses		(3)
Fair Value	$ 11,997	$ 11,867

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).

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