Marketable Securities - Summary of Fair Values and Unrealized Losses of Marketable Securities Held by the Company in an Unrealized Loss Position for Less Than 12 months and 12 Months or Greater (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 45,381	$ 202,689
Less than 12 Months, Unrealized Losses	(605)	(6,024)
12 Months or Greater, Fair Value	356,370	263,824
12 Months or Greater, Unrealized Losses	(10,163)	(8,519)
Total, Fair Value	401,751	466,513
Total, Unrealized Losses	(10,768)	(14,543)
U.S. Government and Agency Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	33,920	91,498
Less than 12 Months, Unrealized Losses	(386)	(2,014)
12 Months or Greater, Fair Value	64,689	38,495
12 Months or Greater, Unrealized Losses	(2,181)	(1,478)
Total, Fair Value	98,609	129,993
Total, Unrealized Losses	(2,567)	(3,492)
Certificates of Deposit [Member]
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	3,379	4,484
Less than 12 Months, Unrealized Losses	(51)	(144)
12 Months or Greater, Fair Value	3,484	2,087
12 Months or Greater, Unrealized Losses	(170)	(104)
Total, Fair Value	6,863	6,571
Total, Unrealized Losses	(221)	(248)
Corporate Bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	8,082	106,707
Less than 12 Months, Unrealized Losses	(168)	(3,866)
12 Months or Greater, Fair Value	288,197	223,242
12 Months or Greater, Unrealized Losses	(7,812)	(6,937)
Total, Fair Value	296,279	329,949
Total, Unrealized Losses	$ (7,980)	$ (10,803)