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Investments - Schedule of Contractual Maturities of Held to Maturity Investments (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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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.

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