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INVESTMENTS (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Available-for-sale
Amortized Cost	$ 992,898	$ 1,032,810
Gross Unrealized Holding Gains	82	546
Gross Unrealized Holding Losses	617	1,320
Fair Value	992,363	1,032,036
Continuous Unrealized Loss Position less than 12 Months	617	1,320
Continuous Unrealized Loss Position greater than 12 Months	0	0
Short-term | Commercial paper
Available-for-sale
Amortized Cost	157,074	163,775
Gross Unrealized Holding Gains	11	0
Gross Unrealized Holding Losses	0	1
Fair Value	157,085	163,774
Continuous Unrealized Loss Position less than 12 Months	0	1
Continuous Unrealized Loss Position greater than 12 Months	0	0
Short-term | Certificates of deposit
Available-for-sale
Amortized Cost	24,831	15,590
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	0
Fair Value	24,831	15,590
Continuous Unrealized Loss Position less than 12 Months	0	0
Continuous Unrealized Loss Position greater than 12 Months	0	0
Short-term | Municipal securities
Available-for-sale
Amortized Cost		361
Gross Unrealized Holding Gains		0
Gross Unrealized Holding Losses		0
Fair Value		361
Continuous Unrealized Loss Position less than 12 Months		0
Continuous Unrealized Loss Position greater than 12 Months		0
Short-term | U.S. government agency securities
Available-for-sale
Amortized Cost	101,893	116,524
Gross Unrealized Holding Gains	16	90
Gross Unrealized Holding Losses	54	66
Fair Value	101,855	116,548
Continuous Unrealized Loss Position less than 12 Months	54	66
Continuous Unrealized Loss Position greater than 12 Months	0	0
Short-term | U.S. treasuries
Available-for-sale
Amortized Cost	530,697	412,936
Gross Unrealized Holding Gains	23	205
Gross Unrealized Holding Losses	390	1,084
Fair Value	530,330	412,057
Continuous Unrealized Loss Position less than 12 Months	390	1,084
Continuous Unrealized Loss Position greater than 12 Months	0	0
Short-term | Corporate bonds
Available-for-sale
Amortized Cost	170,198	247,340
Gross Unrealized Holding Gains	32	89
Gross Unrealized Holding Losses	130	154
Fair Value	170,100	247,275
Continuous Unrealized Loss Position less than 12 Months	130	154
Continuous Unrealized Loss Position greater than 12 Months	0	0
Long-term | U.S. government agency securities
Available-for-sale
Amortized Cost		23,485
Gross Unrealized Holding Gains		51
Gross Unrealized Holding Losses		5
Fair Value		23,531
Continuous Unrealized Loss Position less than 12 Months		5
Continuous Unrealized Loss Position greater than 12 Months		0
Long-term | U.S. treasuries
Available-for-sale
Amortized Cost		35,896
Gross Unrealized Holding Gains		79
Gross Unrealized Holding Losses		8
Fair Value		35,967
Continuous Unrealized Loss Position less than 12 Months		8
Continuous Unrealized Loss Position greater than 12 Months		0
Long-term | Corporate bonds
Available-for-sale
Amortized Cost	8,205	16,903
Gross Unrealized Holding Gains	0	32
Gross Unrealized Holding Losses	43	2
Fair Value	8,162	16,933
Continuous Unrealized Loss Position less than 12 Months	43	2
Continuous Unrealized Loss Position greater than 12 Months	$ 0	$ 0

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