Schedule I - Condensed Statements of Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items]
Equity in net income of subsidiary	$ 234,196	$ 291,190	$ 256,513
Net income	234,196	291,190	256,513
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Equity in net income of subsidiary	234,196	291,190	256,513
Net income	234,196	291,190	256,513
Parent Company [Member] | Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Condensed Financial Statements, Captions [Line Items]
Equity in net income of subsidiary	$ 234,196	$ 291,190	$ 256,513