Marketable Securities - Summary of Available -for-sale Marketable Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Marketable Securities [Line Items]
Amortized Cost	$ 579,163	$ 671,945
Gross Unrealized Gains	1,323	1,281
Gross Unrealized Losses	(266)	(678)
Estimated Fair Value	580,220	672,548
U.S. Treasury and Other Government - Backed Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	293,344	352,309
Gross Unrealized Gains	479	580
Gross Unrealized Losses	(112)	(273)
Estimated Fair Value	293,711	352,616
Financial Institution Debt Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	185,661	217,544
Gross Unrealized Gains	660	528
Gross Unrealized Losses	(78)	(245)
Estimated Fair Value	186,243	217,827
Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	100,158	94,924
Gross Unrealized Gains	184	163
Gross Unrealized Losses	(76)	(160)
Estimated Fair Value	$ 100,266	94,927
Other Asset Backed Securities [Member]
Marketable Securities [Line Items]
Amortized Cost		7,168
Gross Unrealized Gains		10
Gross Unrealized Losses		0
Estimated Fair Value		$ 7,178