Summary of Operations and Significant Accounting Policies - Schedule of Reconciles of Cash, Cash Equivalents and Restricted Cash Balances (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	$ 91,423	$ 69,405	$ 68,688
Restricted cash, included in restricted cash and investments	15,955	9,224	165,149
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 107,378	$ 78,629	$ 233,837