FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Schedule of Financial Assets Subject to Fair Value Measurements on a Recurring Basis by Level Within the Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	$ 1,606,865	$ 1,369,947
Short-term investments	2,424,103	2,489,798
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	1,012,223	461,029
Related Party
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	15,000	0
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	20,000	0
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	1,606,865	1,369,947
Gross Unrealized Gains	4,127	3,869
Gross Unrealized Losses	(1,088)	(2,772)
Short-term investments	2,424,103	2,489,798
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	1,012,223	461,029
Total, amortized cost	5,040,152	4,319,677
Total, estimated fair value	5,043,191	4,320,774
Fair Value, Recurring | Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	610,201	516,673
Cash, estimated fair value	610,201	516,673
Short-term investments	0	0
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	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	851,053	803,274
Amortized cost	2,988,250	2,732,413
Gross Unrealized Gains	2,820	2,480
Gross Unrealized Losses	(531)	(2,073)
Estimated Fair Value	2,990,539	2,732,820
Short-term investments	1,605,369	1,638,537
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	534,117	291,009
Fair Value, Recurring | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	145,611	50,000
Amortized cost	1,441,701	1,070,591
Gross Unrealized Gains	1,307	1,389
Gross Unrealized Losses	(557)	(699)
Estimated Fair Value	1,442,451	1,071,281
Short-term investments	818,734	851,261
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	478,106	170,020
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	677,712	698,702
Amortized cost	677,712	698,702
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	677,712	698,702
Short-term investments	0	0
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	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	173,341	104,572
Amortized cost	2,310,538	2,033,711
Gross Unrealized Gains	2,820	2,480
Gross Unrealized Losses	(531)	(2,073)
Estimated Fair Value	2,312,827	2,034,118
Short-term investments	1,605,369	1,638,537
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	534,117	291,009
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	3,998	105,993
Gross Unrealized Gains	1	97
Gross Unrealized Losses	0	(22)
Estimated Fair Value	3,999	106,068
Short-term investments	3,999	106,068
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	0	0
Fair Value, Recurring | Time deposits | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	60,000	50,000
Amortized cost	515,000	50,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	515,000	50,000
Short-term investments	435,000	0
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	20,000	0
Fair Value, Recurring | Time deposits | Level 2: | Related Party
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	35,000
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	75,442	0
Amortized cost	141,525	299,248
Gross Unrealized Gains	25	191
Gross Unrealized Losses	(4)	(8)
Estimated Fair Value	141,546	299,431
Short-term investments	66,104	299,431
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	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	10,169	0
Amortized cost	781,178	615,350
Gross Unrealized Gains	1,281	1,101
Gross Unrealized Losses	(553)	(669)
Estimated Fair Value	781,906	615,782
Short-term investments	313,631	445,762
Long-term investments (including $20,000 and nil associated with a related party as of December 31, 2024 and 2023, respectively)	$ 458,106	$ 170,020