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Cash and Investments in Marketable Securities - Cash and Investments in Marketable Securities, Including Cash Equivalents (Detail) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]    
Cash and cash equivalents $ 77,545 $ 25,218
Short-term investments 541,771 708,737
Long-term investments 8,928 64,828
Total cash and investments in marketable securities $ 628,244 $ 798,783