Fair Value of Financial Instruments - Summary of Composition of Short and Long Term Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,286,649	$ 1,204,247
Unrealized Gains	428	24
Unrealized Losses	(5,716)	(9,818)
Aggregate Fair Value	1,281,361	1,194,453
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	20,325	16,036
Aggregate Fair Value	20,325	16,036
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	250,920	265,875
Unrealized Gains	96	9
Unrealized Losses	(2,523)	(3,966)
Aggregate Fair Value	248,493	261,918
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	55,791	40,908
Unrealized Gains	13	1
Unrealized Losses	(629)	(944)
Aggregate Fair Value	55,175	39,965
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	959,613	881,428
Unrealized Gains	319	14
Unrealized Losses	(2,564)	(4,908)
Aggregate Fair Value	$ 957,368	$ 876,534

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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Amortized cost of 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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