FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Schedule of Fair Value Measurements on a Recurring Basis by Level within the Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	$ 1,164,391	$ 1,735,765
Short-term investments	3,258,206	2,177,231
Long-term investments	479,727	529,974
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	1,164,391	1,735,765
Gross Unrealized Gains	396	535
Gross Unrealized Losses	(9,378)	(12,107)
Short-term investments	3,258,206	2,177,231
Long-term investments	479,727	529,974
Total, amortized cost	4,911,306	4,454,542
Total, estimated fair value	4,902,324	4,442,970
Fair Value, Recurring | Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	522,195	321,667
Cash, estimated fair value	522,195	321,667
Short-term investments	0	0
Long-term investments	0	0
Fair Value, Recurring | Level 1:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	617,243	1,377,540
Amortized cost	3,080,366	3,238,989
Gross Unrealized Gains	59	151
Gross Unrealized Losses	(6,232)	(9,431)
Estimated Fair Value	3,074,193	3,229,709
Short-term investments	2,205,811	1,570,591
Long-term investments	251,139	281,578
Fair Value, Recurring | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	24,953	36,558
Amortized cost	1,308,745	893,886
Gross Unrealized Gains	337	384
Gross Unrealized Losses	(3,146)	(2,676)
Estimated Fair Value	1,305,936	891,594
Short-term investments	1,052,395	606,640
Long-term investments	228,588	248,396
Fair Value, Recurring | Money market funds | Level 1:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	557,476	1,377,540
Amortized cost	557,476	1,377,540
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	557,476	1,377,540
Short-term investments	0	0
Long-term investments	0	0
Fair Value, Recurring | U.S. Treasury securities | Level 1:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	59,767	0
Amortized cost	2,522,890	1,861,449
Gross Unrealized Gains	59	151
Gross Unrealized Losses	(6,232)	(9,431)
Estimated Fair Value	2,516,717	1,852,169
Short-term investments	2,205,811	1,570,591
Long-term investments	251,139	281,578
Fair Value, Recurring | U.S. government agency securities | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	0	0
Amortized cost	45,005	43,477
Gross Unrealized Gains	0	46
Gross Unrealized Losses	(26)	(18)
Estimated Fair Value	44,979	43,505
Short-term investments	44,979	43,505
Long-term investments	0	0
Fair Value, Recurring | Certificates of deposit | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	0	0
Amortized cost	144,180	174,037
Gross Unrealized Gains	49	67
Gross Unrealized Losses	(107)	(132)
Estimated Fair Value	144,122	173,972
Short-term investments	144,122	173,972
Long-term investments	0	0
Fair Value, Recurring | Commercial paper | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	24,953	19,761
Amortized cost	447,969	238,224
Gross Unrealized Gains	14	63
Gross Unrealized Losses	(210)	(122)
Estimated Fair Value	447,773	238,165
Short-term investments	422,820	218,404
Long-term investments	0	0
Fair Value, Recurring | Corporate debt securities | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	0	16,797
Amortized cost	671,591	438,148
Gross Unrealized Gains	274	208
Gross Unrealized Losses	(2,803)	(2,404)
Estimated Fair Value	669,062	435,952
Short-term investments	440,474	170,759
Long-term investments	$ 228,588	$ 248,396