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, 2026	Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	$ 732,601	$ 997,827
Gross Unrealized Gains	0	7,097
Gross Unrealized Losses	(13)	0
Short-Term Investments	28,712	631,093
Long-Term Investments		487,982
Total, amortized cost	761,326	2,109,805
Total, estimated fair value	761,313	2,116,902
Related Party
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0	50,000
Level 1:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	289,329	235,750
Amortized cost	313,247	810,909
Gross Unrealized Gains	0	3,655
Gross Unrealized Losses	(2)	0
Estimated Fair Value	313,245	814,564
Short-Term Investments	23,916	398,011
Long-Term Investments		180,803
Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	65,144	0
Amortized cost	69,951	536,819
Gross Unrealized Gains	0	3,442
Gross Unrealized Losses	(11)	0
Estimated Fair Value	69,940	540,261
Short-Term Investments	4,796	233,082
Long-Term Investments		307,179
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	198,616	0
Amortized cost	222,534	575,159
Gross Unrealized Gains	0	3,655
Gross Unrealized Losses	(2)	0
Estimated Fair Value	222,532	578,814
Short-Term Investments	23,916	398,011
Long-Term Investments		180,803
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
Amortized cost	4,803
Gross Unrealized Gains	0
Gross Unrealized Losses	(7)
Estimated Fair Value	4,796
Short-Term Investments	4,796
Time deposits \| Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost		0
Amortized cost		65,000
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Estimated Fair Value		65,000
Short-Term Investments		65,000
Long-Term Investments		0
Time deposits \| Level 2: \| Related Party \| GIB
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	50,000
Commercial paper \| Level 2:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	65,144
Amortized cost	65,148
Gross Unrealized Gains	0
Gross Unrealized Losses	(4)
Estimated Fair Value	65,144
Short-Term Investments	0
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
Amortized cost		471,819
Gross Unrealized Gains		3,442
Gross Unrealized Losses		0
Estimated Fair Value		475,261
Short-Term Investments		168,082
Long-Term Investments		307,179
Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	378,128	762,077
Cash, estimated fair value	378,128	762,077
Short-Term Investments	0	0
Long-Term Investments		0
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	90,713	235,750
Cash, estimated fair value	90,713	235,750
Short-Term Investments	$ 0	0
Long-Term Investments		$ 0

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