FAIR VALUE MEASUREMENTS - SECURITIES WITH UNREALIZED LOSSES (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months - Estimated Fair Value	$ 198,312	$ 75,721
Less Than 12 Months - Gross Unrealized Losses	(257)	(165)
12 Months or Longer - Estimated Fair Value	10,979	28,435
12 Months or Longer - Gross Unrealized Losses	(23)	(82)
Total - Estimated Fair Value	209,291	104,156
Total - Gross Unrealized Losses	(280)	(247)
U.S. Treasury securities (due in less than one year)
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months - Estimated Fair Value		11,424
Less Than 12 Months - Gross Unrealized Losses		(57)
12 Months or Longer - Estimated Fair Value		1,497
12 Months or Longer - Gross Unrealized Losses		(5)
Total - Estimated Fair Value		12,921
Total - Gross Unrealized Losses		(62)
Municipal securities (due in less than one year)
Schedule Of Available For Sale Securities [Line Items]
12 Months or Longer - Estimated Fair Value		2,976
12 Months or Longer - Gross Unrealized Losses		(24)
Total - Estimated Fair Value		2,976
Total - Gross Unrealized Losses		(24)
Government-sponsored enterprise securities (due in less than one year)
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months - Estimated Fair Value	22,718	9,845
Less Than 12 Months - Gross Unrealized Losses	(15)	(14)
Total - Estimated Fair Value	22,718	9,845
Total - Gross Unrealized Losses	(15)	(14)
Commercial paper (due in less than one year)
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months - Estimated Fair Value	162,072	52,454
Less Than 12 Months - Gross Unrealized Losses	(204)	(92)
Total - Estimated Fair Value	162,072	52,454
Total - Gross Unrealized Losses	(204)	(92)
Corporate notes (due in less than one year)
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months - Estimated Fair Value	3,976	1,998
Less Than 12 Months - Gross Unrealized Losses	(6)	(2)
12 Months or Longer - Estimated Fair Value	10,979	23,962
12 Months or Longer - Gross Unrealized Losses	(23)	(53)
Total - Estimated Fair Value	14,955	25,960
Total - Gross Unrealized Losses	(29)	$ (55)
Corporate notes (due in one to two years)
Schedule Of Available For Sale Securities [Line Items]
Less Than 12 Months - Estimated Fair Value	9,546
Less Than 12 Months - Gross Unrealized Losses	(32)
Total - Estimated Fair Value	9,546
Total - Gross Unrealized Losses	$ (32)