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, 2026	Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost	$ 700,356	$ 997,827
Short-Term Investments	0	631,093
Long-Term Investments	13,615	512,241
Related Party
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0	50,000
Long-Term Investments	13,615	24,259
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost		997,827
Gross Unrealized Gains		7,097
Gross Unrealized Losses		0
Short-Term Investments		631,093
Long-Term Investments		487,982
Total, amortized cost		2,109,805
Total, estimated fair value	700,356	2,116,902
Fair Value, Recurring \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost		235,750
Amortized cost		810,909
Gross Unrealized Gains		3,655
Gross Unrealized Losses		0
Estimated Fair Value		814,564
Short-Term Investments		398,011
Long-Term Investments		180,803
Fair Value, Recurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost		0
Amortized cost		536,819
Gross Unrealized Gains		3,442
Gross Unrealized Losses		0
Estimated Fair Value		540,261
Short-Term Investments		233,082
Long-Term Investments		307,179
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		235,750
Amortized cost		235,750
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Estimated Fair Value	129,189	235,750
Short-Term Investments		0
Long-Term Investments		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		0
Amortized cost		575,159
Gross Unrealized Gains		3,655
Gross Unrealized Losses		0
Estimated Fair Value		578,814
Short-Term Investments		398,011
Long-Term Investments		180,803
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		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
Fair Value, Recurring \| 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
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
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, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, amortized cost		762,077
Cash, estimated fair value	$ 571,167	762,077
Short-Term Investments		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