Summary of Operations and Significant Accounting Policies - Schedule of Reconciles of Cash, Cash Equivalents and Restricted Cash Balances (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	$ 71,168	$ 91,423	$ 69,405
Restricted cash, included in restricted cash and investments	3,673	15,955	9,224
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 74,841	$ 107,378	$ 78,629