Marketable Securities - Summary of Company Marketable Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost / Cost	$ 584,010	$ 505,846
Unrealized Gains	6	64
Unrealized Losses	(11,096)	(1,773)
Fair Value	572,920	504,137
U.S. Government and Agency Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost / Cost	175,578	60,118
Unrealized Losses	(2,041)	(229)
Fair Value	173,537	59,889
Certificates of Deposit [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost / Cost	3,664	2,936
Unrealized Gains		2
Unrealized Losses	(73)	(11)
Fair Value	3,591	2,927
Corporate Bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost / Cost	404,768	442,792
Unrealized Gains	6	62
Unrealized Losses	(8,982)	(1,533)
Fair Value	$ 395,792	$ 441,321

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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