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Marketable Securities - Summary of Cash Equivalents and Marketable Securities Recorded at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Cash equivalents, amortized cost	$ 104,308	$ 191,721
Cash equivalents, gross unrealized gains	0	0
Cash equivalents, gross unrealized losses	(9)	0
Cash equivalents, fair value	104,299	191,721
Marketable securities, amortized cost	1,589,245	1,304,304
Total marketable securities, amortized cost	1,599,632
Marketable securities, gross unrealized gains	3,960	3,821
Total marketable securities, gross unrealized gains	8,560
Marketable securities, gross unrealized losses	(2,128)	(1,937)
Total marketable securities, gross unrealized losses	(2,623)
Marketable securities, fair value	1,591,077	1,306,188
Total marketable securities, fair value	1,605,569
Cash equivalents and marketable securities, amortized cost	1,703,940	1,496,025
Cash equivalents and marketable securities, gross unrealized gains	8,560	3,821
Cash equivalents and marketable securities, gross unrealized losses	(2,632)	(1,937)
Cash equivalents and marketable securities, fair value	1,709,868	1,497,909
Money Market Funds [Member]
Marketable Securities [Line Items]
Cash equivalents, amortized cost	74,155	185,990
Cash equivalents, gross unrealized gains	0	0
Cash equivalents, gross unrealized losses	0	0
Cash equivalents, fair value	74,155	185,990
US Treasury Securities [Member]
Marketable Securities [Line Items]
Cash equivalents, amortized cost		5,731
Cash equivalents, gross unrealized gains		0
Cash equivalents, gross unrealized losses		0
Cash equivalents, fair value		5,731
Marketable securities, amortized cost	5,936	22,963
Marketable securities, gross unrealized gains	2	45
Marketable securities, gross unrealized losses	0	0
Marketable securities, fair value	5,938	23,008
Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Cash equivalents, amortized cost	882
Cash equivalents, gross unrealized gains	0
Cash equivalents, gross unrealized losses	0
Cash equivalents, fair value	882
Marketable securities, amortized cost	1,136,255	883,550
Marketable securities, gross unrealized gains	3,442	3,367
Marketable securities, gross unrealized losses	(1,592)	(1,559)
Marketable securities, fair value	1,138,105	885,358
Certificates of Deposit [Member]
Marketable Securities [Line Items]
Marketable securities, amortized cost	52,372	47,282
Marketable securities, gross unrealized gains	0	0
Marketable securities, gross unrealized losses	0	0
Marketable securities, fair value	52,372	47,282
Government-sponsored Enterprise Securities [Member]
Marketable Securities [Line Items]
Marketable securities, amortized cost	266,877	195,106
Marketable securities, gross unrealized gains	482	377
Marketable securities, gross unrealized losses	(497)	(352)
Marketable securities, fair value	266,862	195,131
Commercial Paper [Member]
Marketable Securities [Line Items]
Cash equivalents, amortized cost	29,271
Cash equivalents, gross unrealized gains	0
Cash equivalents, gross unrealized losses	(9)
Cash equivalents, fair value	29,262
Marketable securities, amortized cost	127,805	155,403
Marketable securities, gross unrealized gains	34	32
Marketable securities, gross unrealized losses	(39)	(26)
Marketable securities, fair value	127,800	$ 155,409
Corporate Equity Securities [Member]
Marketable Securities [Line Items]
Total marketable securities, amortized cost	10,387
Total marketable securities, gross unrealized gains	4,600
Total marketable securities, gross unrealized losses	(495)
Total marketable securities, fair value	$ 14,492

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