Summary of Cash, Cash Equivalents and Restricted Cash Reported In Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect [Abstract]
Cash and cash equivalents		$ 119,439	$ 102,818	$ 115,301
Restricted cash	[1]	$ 95,031	$ 98,019	$ 63,633
Restricted Cash and Cash Equivalents, Noncurrent, Asset, Statement of Financial Position [Extensible List]		Other Assets, Noncurrent	Other Assets, Noncurrent	Other Assets, Noncurrent
Total cash, cash equivalents and restricted cash		$ 214,470	$ 200,837	$ 178,934

[1] (a) Restricted cash is included in other assets on the accompanying consolidated balance sheets and consists of statutorily required capital reserves related to our commercial insurance subsidiary. The fair value of our restricted cash was computed based upon quotes received from financial institutions. We consider these to be “level 1” in the fair value hierarchy as outlined in the authoritative guidance for disclosures in connection with financial securities.