Cash, Cash Equivalents and Investments - Gross Unrealized Losses and Fair Value for Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 225,222	$ 68,557
Unrealized Losses, Less than 12 months	(3,199)	(1,561)
Fair Value, Greater than 12 Months	93,582	233,304
Unrealized Losses, Greater than 12 Months	(2,118)	(8,994)
Fair Value	318,804	301,861
Unrealized Losses	(5,317)	(10,555)
Treasury Bills [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	42,149	20,725
Unrealized Losses, Less than 12 months	(425)	(153)
Fair Value, Greater than 12 Months	2,487	2,441
Unrealized Losses, Greater than 12 Months	(14)	(60)
Fair Value	44,636	23,166
Unrealized Losses	(439)	(213)
Asset-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	11,024	17,062
Unrealized Losses, Less than 12 months	(547)	(1,049)
Fair Value, Greater than 12 Months	2,290	2,252
Unrealized Losses, Greater than 12 Months	(10)	(47)
Fair Value	13,314	19,314
Unrealized Losses	(557)	(1,096)
Sovereign Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	0	0
Unrealized Losses, Less than 12 months	0	0
Fair Value, Greater than 12 Months	990	1,968
Unrealized Losses, Greater than 12 Months	(23)	(80)
Fair Value	990	1,968
Unrealized Losses	(23)	(80)
Corporate Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	172,049	30,770
Unrealized Losses, Less than 12 months	(2,227)	(359)
Fair Value, Greater than 12 Months	87,815	226,643
Unrealized Losses, Greater than 12 Months	(2,071)	(8,807)
Fair Value	259,864	257,413
Unrealized Losses	$ (4,298)	$ (9,166)