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	Jun. 30, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	$ 1,795,719	$ 1,606,865
Short-term investments	1,030,140	2,424,103
Long-term investments	776,677	1,012,223
Related Party
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	35,000	15,000
Long-term investments	30,000	20,000
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	1,795,719	1,606,865
Gross Unrealized Gains	6,930	4,127
Gross Unrealized Losses	(46)	(1,088)
Short-term investments	1,030,140	2,424,103
Long-term investments	776,677	1,012,223
Total, amortized cost	3,595,652	5,040,152
Total, estimated fair value	3,602,536	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	1,013,780	851,053
Amortized cost	1,909,873	2,988,250
Gross Unrealized Gains	3,769	2,820
Gross Unrealized Losses	(33)	(531)
Estimated Fair Value	1,913,609	2,990,539
Short-term investments	555,793	1,605,369
Long-term investments	344,036	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	858,305	677,712
Amortized cost	858,305	677,712
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	858,305	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	155,475	173,341
Amortized cost	1,051,568	2,310,538
Gross Unrealized Gains	3,769	2,820
Gross Unrealized Losses	(33)	(531)
Estimated Fair Value	1,055,304	2,312,827
Short-term investments	555,793	1,605,369
Long-term investments	344,036	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	97,376	145,611
Amortized cost	1,001,216	1,441,701
Gross Unrealized Gains	3,161	1,307
Gross Unrealized Losses	(13)	(557)
Estimated Fair Value	1,004,364	1,442,451
Short-term investments	474,347	818,734
Long-term investments	432,641	478,106
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	75,000	60,000
Amortized cost	405,000	515,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	405,000	515,000
Short-term investments	300,000	435,000
Long-term investments	30,000	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	35,000	15,000
Long-term investments	30,000	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	22,376	75,442
Amortized cost	27,863	141,525
Gross Unrealized Gains	0	25
Gross Unrealized Losses	(3)	(4)
Estimated Fair Value	27,860	141,546
Short-term investments	5,484	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	0	10,169
Amortized cost	568,353	781,178
Gross Unrealized Gains	3,161	1,281
Gross Unrealized Losses	(10)	(553)
Estimated Fair Value	571,504	781,906
Short-term investments	168,863	313,631
Long-term investments	402,641	458,106
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
Amortized cost		3,998
Gross Unrealized Gains		1
Gross Unrealized Losses		0
Estimated Fair Value		3,999
Short-term investments		3,999
Long-term investments		0
Cash | Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	684,563	610,201
Cash, estimated fair value	684,563	610,201
Short-term investments	0	0
Long-term investments	$ 0	$ 0