Cash, Cash Equivalents, Restricted Cash And Investments - Summary of Unrealized Gains and Losses and Estimated Fair Value of Cash Equivalents and Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Cash and Cash Equivalents [Line Items]
Amortized Cost	$ 699,823	$ 366,111
Gross Unrealized Gains	224	341
Gross Unrealized Losses	(221)	(171)
Estimated Fair Value	699,826	366,281
Cash and money market funds [Member]
Cash and Cash Equivalents [Line Items]
Amortized Cost	24,871	33,204
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	24,871	33,204
Corporate Notes And Bonds [Member]
Cash and Cash Equivalents [Line Items]
Amortized Cost	13,923	45,823
Gross Unrealized Gains	14	22
Gross Unrealized Losses	(5)	(53)
Estimated Fair Value	13,932	45,792
US Government Corporations and Agencies Securities [Member]
Cash and Cash Equivalents [Line Items]
Amortized Cost	661,029	287,084
Gross Unrealized Gains	210	319
Gross Unrealized Losses	(216)	(118)
Estimated Fair Value	$ 661,023	$ 287,285