v3.26.3
MARKETABLE DEBT SECURITIES - Schedule of Marketable Debt Securities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 1,892,866 $ 1,271,511
Gross Unrealized Gains 32 3,448
Gross Unrealized Losses (15,770) (88)
Fair Value 1,877,128 1,274,871
U.S. treasury securities    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 890,175 670,566
Gross Unrealized Gains 17 1,736
Gross Unrealized Losses (7,248) (9)
Fair Value 882,944 672,293
Corporate notes    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 518,707 332,104
Gross Unrealized Gains 11 1,152
Gross Unrealized Losses (4,423) (15)
Fair Value 514,295 333,241
U.S. government-sponsored enterprise securities    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 455,852 254,829
Gross Unrealized Gains 4 559
Gross Unrealized Losses (4,051) (64)
Fair Value 451,805 255,324
Commercial paper    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 28,132 9,012
Gross Unrealized Gains 0 0
Gross Unrealized Losses (48) 0
Fair Value $ 28,084 9,012
Municipal securities    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost   5,000
Gross Unrealized Gains   1
Gross Unrealized Losses   0
Fair Value   $ 5,001