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Investments - Schedule of Investments (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Available-for-sale Securities | $ 0 | $ 93,239
Corporate Securities [Member] |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Available-for-sale Securities | 57,878 | 61,385
US Treasury Securities [Member] |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Available-for-sale Securities | 22,674 | 10,205
Municipal Debt Securities [Member] |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Available-for-sale Securities | 14,649 | 14,377
Federal Home Loan Securities [Member] |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Available-for-sale Securities | 5,670 | 3,562
Certificates of Deposit [Member] |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Available-for-sale Securities | $ 3,614 | $ 3,710

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