CASH EQUIVALENTS AND MARKETABLE SECURITIES - Schedule of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,197,483	$ 969,740
Gross Unrealized Gains	2	0
Gross Unrealized Losses	(12,211)	(2,859)
Fair Value	1,185,274	966,881
Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	432,946	69,546
Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	752,328	897,335
Money market funds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	432,946	35,789
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	432,946	35,789
Money market funds \| Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	432,946	35,789
Money market funds \| Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	0
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,126	16,001
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(24)	(2)
Fair Value	3,102	15,999
Certificates of deposit \| Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	6,000
Certificates of deposit \| Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	3,102	9,999
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	121,294	215,964
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(224)	(114)
Fair Value	121,070	215,850
Commercial paper \| Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	26,997
Commercial paper \| Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	121,070	188,853
Corporate notes and bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	144,438	199,244
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(3,189)	(872)
Fair Value	141,250	198,372
Corporate notes and bonds \| Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	760
Corporate notes and bonds \| Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	141,250	197,612
U.S. Treasuries
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	39,551	14,999
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(8)	(1)
Fair Value	39,544	14,998
U.S. Treasuries \| Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	0
U.S. Treasuries \| Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	39,544	14,998
U.S. Government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	456,128	487,743
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(8,766)	(1,870)
Fair Value	447,362	485,873
U.S. Government agencies \| Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	0
U.S. Government agencies \| Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 447,362	$ 485,873

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).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

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Amount, before tax, of unrealized loss 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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

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Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

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Amount excluding accrued interest, of 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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