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	Mar. 31, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	$ 1,854,879	$ 1,606,865
Short-term investments	1,756,026	2,424,103
Long-term investments	921,588	1,012,223
Related Party
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	15,000	15,000
Long-term investments	50,000	20,000
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	1,854,879	1,606,865
Gross Unrealized Gains	6,726	4,127
Gross Unrealized Losses	(135)	(1,088)
Short-term investments	1,756,026	2,424,103
Long-term investments	921,588	1,012,223
Total, amortized cost	4,525,902	5,040,152
Total, estimated fair value	4,532,493	5,043,191
Fair Value, Recurring | Level 1:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	1,078,855	851,053
Amortized cost	2,586,524	2,988,250
Gross Unrealized Gains	4,094	2,820
Gross Unrealized Losses	(56)	(531)
Estimated Fair Value	2,590,562	2,990,539
Short-term investments	1,076,832	1,605,369
Long-term investments	434,875	534,117
Fair Value, Recurring | Level 1: | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	962,608	677,712
Amortized cost	962,608	677,712
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	962,608	677,712
Short-term investments	0	0
Long-term investments	0	0
Fair Value, Recurring | Level 1: | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	116,247	173,341
Amortized cost	1,623,916	2,310,538
Gross Unrealized Gains	4,094	2,820
Gross Unrealized Losses	(56)	(531)
Estimated Fair Value	1,627,954	2,312,827
Short-term investments	1,076,832	1,605,369
Long-term investments	434,875	534,117
Fair Value, Recurring | Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	120,344	145,611
Amortized cost	1,283,698	1,441,701
Gross Unrealized Gains	2,632	1,307
Gross Unrealized Losses	(79)	(557)
Estimated Fair Value	1,286,251	1,442,451
Short-term investments	679,194	818,734
Long-term investments	486,713	478,106
Fair Value, Recurring | Level 2: | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	0	0
Amortized cost	3,101	3,998
Gross Unrealized Gains	0	1
Gross Unrealized Losses	0	0
Estimated Fair Value	3,101	3,999
Short-term investments	3,101	3,999
Long-term investments	0	0
Fair Value, Recurring | Level 2: | Time deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	60,000	60,000
Amortized cost	515,000	515,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	515,000	515,000
Short-term investments	405,000	435,000
Long-term investments	50,000	20,000
Fair Value, Recurring | Level 2: | Time deposits | Related Party | GIB
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	15,000	15,000
Long-term investments	50,000	20,000
Fair Value, Recurring | Level 2: | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	44,688	75,442
Amortized cost	77,417	141,525
Gross Unrealized Gains	3	25
Gross Unrealized Losses	(8)	(4)
Estimated Fair Value	77,412	141,546
Short-term investments	32,724	66,104
Long-term investments	0	0
Fair Value, Recurring | Level 2: | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	15,656	10,169
Amortized cost	688,180	781,178
Gross Unrealized Gains	2,629	1,281
Gross Unrealized Losses	(71)	(553)
Estimated Fair Value	690,738	781,906
Short-term investments	238,369	313,631
Long-term investments	436,713	458,106
Cash | Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	655,680	610,201
Cash, estimated fair value	655,680	610,201
Short-term investments	0	0
Long-term investments	$ 0	$ 0