Investments - Schedule of Contractual Maturities of Held to Maturity Investments (Detail) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized cost basis, due in one year or less	[1]	$ 115,263	$ 152,862
Amortized cost basis due after one year through five years		7,155	1,961
Amortized cost basis, total		122,418	154,823
Aggregate fair value, due in one year or less	[1]	115,374	156,976
Aggregate fair value, due after one year through five years		7,197	1,948
Aggregate fair value, total		$ 122,571	$ 158,924

[1] The investments due in one year or less include cash equivalents of $58.6 million as of December 31, 2023 and $51.8 million as of December 31, 2022.