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Summary of Estimated Fair Values of Bonds Held on Deposit (Detail) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |  |
Estimated Fair Value | [1] | $ 177,506 | $ 170,058
On Deposit With Governmental Authorities |  |  |
Schedule Of Available For Sale Securities [Line Items] |  |  |
Estimated Fair Value |  | 19,627 | 19,262
Held In Trust Pursuant To Third Party Requirements |  |  |
Schedule Of Available For Sale Securities [Line Items] |  |  |
Estimated Fair Value |  | $ 157,879 | $ 150,796
[1] | Includes cash and cash equivalents o f $3.9 mi llion and $9.0 million at September 30, 2024 and December 31, 2023, respectively, with the remainder related to bonds available for sale.

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