Summary of Company Financial Assets with Maturities of Less Than 90 Days Included in Cash Equivalents (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Cash and Cash Equivalents [Line Items]
Cash equivalents	$ 506,997	$ 1,562,358
Money Market Funds [Member]
Cash and Cash Equivalents [Line Items]
Cash equivalents	464,060
Government and Government Agency Bonds [Member]
Cash and Cash Equivalents [Line Items]
Cash equivalents	$ 42,937	1,562,358
Corporate Bond [Member]
Cash and Cash Equivalents [Line Items]
Cash equivalents		$ 0