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FINANCIAL INSTRUMENTS - Schedule of Cash, Cash Equivalents, Restricted Cash Equivalents and Available-for-Sale Securities by Significant Investment Category (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Mar. 31, 2026
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 2,047,956 | $ 3,072,435
Gross Unrealized Gains | 4,903 | 0
Gross Unrealized Losses | (8) | 0
Aggregate Fair Value | 2,052,851 | 3,072,435
Cash and Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 1,311,679 | 2,222,435
Restricted Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value |  | 850,000
Short-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 248,930 |
Long-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | $ 492,242 |
Maximum |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Short term marketable securities maturity period | 1 year |
Long term marketable securities maturity period | 5 years |
Minimum |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Long term marketable securities maturity period | 1 year |
Level 1: |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cash | $ 415,760 | 352,248
Cash, aggregate fair value | 415,760 | 352,248
Level 1: | Cash and Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cash, aggregate fair value | 415,760 | 352,248
Level 1: | Restricted Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cash, aggregate fair value |  | 0
Level 1: | Short-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cash, aggregate fair value | 0 |
Level 1: | Long-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cash, aggregate fair value | 0 |
Level 2: |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 1,632,196 |
Gross Unrealized Gains | 4,903 |
Gross Unrealized Losses | (8) |
Aggregate Fair Value | 1,637,091 |
Level 2: | Cash and Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 895,919 |
Level 2: | Short-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 248,930 |
Level 2: | Long-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 492,242 |
Level 2: | Money market instruments |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 895,919 | 2,720,187
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Aggregate Fair Value | 895,919 | 2,720,187
Level 2: | Money market instruments | Cash and Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 895,919 | 1,870,187
Level 2: | Money market instruments | Restricted Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value |  | $ 850,000
Level 2: | Money market instruments | Short-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 0 |
Level 2: | Money market instruments | Long-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 0 |
Level 2: | Corporate debt securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 472,572 |
Gross Unrealized Gains | 3,286 |
Gross Unrealized Losses | (3) |
Aggregate Fair Value | 475,855 |
Level 2: | Corporate debt securities | Cash and Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 0 |
Level 2: | Corporate debt securities | Short-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 189,566 |
Level 2: | Corporate debt securities | Long-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 286,289 |
Level 2: | U.S. government agency securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 206,018 |
Gross Unrealized Gains | 1,197 |
Gross Unrealized Losses | (1) |
Aggregate Fair Value | 207,214 |
Level 2: | U.S. government agency securities | Cash and Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 0 |
Level 2: | U.S. government agency securities | Short-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 59,115 |
Level 2: | U.S. government agency securities | Long-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 148,099 |
Level 2: | Asset-backed securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 57,687 |
Gross Unrealized Gains | 420 |
Gross Unrealized Losses | (4) |
Aggregate Fair Value | 58,103 |
Level 2: | Asset-backed securities | Cash and Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 0 |
Level 2: | Asset-backed securities | Short-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | 249 |
Level 2: | Asset-backed securities | Long-term Marketable Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Aggregate Fair Value | $ 57,854 |

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