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FINANCIAL INSTRUMENTS - Schedule of Cash, Cash Equivalents and Available-for-Sale Securities by Significant Investment Category (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 1,523,467 | $ 1,345,801
Gross Unrealized Gains | 719 | 5,069
Gross Unrealized Losses | (2,518) | (11)
Aggregate Fair Value | 1,521,668 | 1,350,859
Cash and Cash Equivalents | 587,276 | 649,158
Short-term Marketable Securities | 426,599 | 416,228
Long-term Marketable Securities | $ 507,793 | $ 285,473
Maximum |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Short-term marketable securities maturity period | 1 year | 1 year
Long-term marketable securities maturity period | 5 years | 5 years
Minimum |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Long-term marketable securities maturity period | 1 year | 1 year
Quoted Price in Active Markets For Identical Assets (Level 1) | Cash |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cash | $ 301,177 | $ 370,325
Cash aggregate fair value | 301,177 | 370,325
Cash and Cash Equivalents | 301,177 | 370,325
Level 2 |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 1,222,290 | 975,476
Gross Unrealized Gains | 719 | 5,069
Gross Unrealized Losses | (2,518) | (11)
Aggregate Fair Value | 1,220,491 | 980,534
Cash and Cash Equivalents | 286,099 | 278,833
Short-term Marketable Securities | 426,599 | 416,228
Long-term Marketable Securities | 507,793 | 285,473
Level 2 | Money Market Instruments |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 285,099 | 264,833
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Aggregate Fair Value | 285,099 | 264,833
Cash and Cash Equivalents | 285,099 | 264,833
Short-term Marketable Securities | 0 | 0
Long-term Marketable Securities | 0 | 0
Level 2 | Corporate Debt Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 584,000 | 413,137
Gross Unrealized Gains | 386 | 3,261
Gross Unrealized Losses | (2,086) | (8)
Aggregate Fair Value | 582,300 | 416,390
Cash and Cash Equivalents | 0 | 0
Short-term Marketable Securities | 200,304 | 220,551
Long-term Marketable Securities | 381,996 | 195,839
Level 2 | U.S. Government Agency Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 224,774 | 265,298
Gross Unrealized Gains | 182 | 1,555
Gross Unrealized Losses | (325) | (1)
Aggregate Fair Value | 224,631 | 266,852
Cash and Cash Equivalents | 0 | 14,000
Short-term Marketable Securities | 146,421 | 192,488
Long-term Marketable Securities | 78,210 | 60,364
Level 2 | Commercial Paper |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 68,384 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | 0 |
Aggregate Fair Value | 68,384 |
Cash and Cash Equivalents | 1,000 |
Short-term Marketable Securities | 67,384 |
Long-term Marketable Securities | 0 |
Level 2 | Asset-backed Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 56,936 | 31,659
Gross Unrealized Gains | 10 | 85
Gross Unrealized Losses | (95) | (2)
Aggregate Fair Value | 56,851 | 31,742
Cash and Cash Equivalents | 0 | 0
Short-term Marketable Securities | 9,451 | 3,189
Long-term Marketable Securities | 47,400 | 28,553
Level 2 | Foreign and Other |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 3,097 | 549
Gross Unrealized Gains | 141 | 168
Gross Unrealized Losses | (12) | 0
Aggregate Fair Value | 3,226 | 717
Cash and Cash Equivalents | 0 | 0
Short-term Marketable Securities | 3,039 | 0
Long-term Marketable Securities | $ 187 | $ 717

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