Cash, Cash Equivalents and Marketable Securities - Summary of Company Cash, Cash Equivalents and Short-term Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents, Amortized cost	$ 1,377,887	$ 1,675,305
Available for sale debt securities, Gross unrealized gains	2,307	1,124
Cash, cash equivalents and investments, Gross unrealized gains	2,307	1,124
Available for sale debt securities, Gross unrealized losses	(35)	(179)
Cash, cash equivalents and investments, Gross unrealized losses	(35)	(179)
Cash and cash equivalents, Fair value	197,855	428,430	$ 541,932
Cash, cash equivalents and investments, Fair value	1,380,159	1,676,250
Cash and Money Market Funds [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents, Amortized cost	193,524	374,750
Cash and cash equivalents, Fair value	193,524	374,750
Commercial Paper [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents, Amortized cost	34,995	113,362
Available for sale debt securities, Fair value	34,995	113,362
Government and Government Agency Bonds [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents, Amortized cost	898,726	1,000,302
Available for sale debt securities, Gross unrealized gains	1,704	1,006
Available for sale debt securities, Gross unrealized losses	(23)	(171)
Available for sale debt securities, Fair value	900,407	1,001,137
Corporate Bond [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents, Amortized cost	232,654	130,270
Available for sale debt securities, Gross unrealized gains	603	118
Available for sale debt securities, Gross unrealized losses	(12)	(8)
Available for sale debt securities, Fair value	233,245	130,380
Certificates of Deposit [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents, Amortized cost	17,988	56,621
Available for sale debt securities, Fair value	17,988	56,621
Cash and Cash Equivalents [Member]
Cash and Cash Equivalents [Line Items]
Cash, cash equivalents and investments, Amortized cost	197,854	428,430
Cash and cash equivalents, Gross unrealized gains	1
Cash and cash equivalents, Fair value	197,855	428,430
Short-term Investments [Member]
Cash and Cash Equivalents [Line Items]
Available for sale debt securities, Amortized cost	998,884	1,246,875
Available for sale debt securities, Gross unrealized gains	1,667	1,124
Available for sale debt securities, Gross unrealized losses	(17)	(179)
Available for sale debt securities current, Fair value	1,000,534	$ 1,247,820
Non-current investments [Member]
Cash and Cash Equivalents [Line Items]
Other Non-Current Assets Amortized Cost	181,149
Available for sale debt securities, Gross unrealized gains	639
Available for sale debt securities, Gross unrealized losses	(18)
Available for sale debt securities, Fair value	$ 181,770

Cash and cash equivalents amortized cost basis.

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Cash and cash equivalents gross unrealized gain before tax.

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Cash cash equivalents and investments.

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Cash cash equivalents and investments gross unrealized gain before tax.

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Cash cash equivalents and investments gross unrealized loss before tax.

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Other Non-Current Assets Amortized Cost

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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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Amount, before tax, of unrealized loss 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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Amount 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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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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