Summary of Share-Settled Restricted Stock Unit Activity (Detail) - Share-settled Restricted Stock Units - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Number of Shares/Units
Beginning Balance	120,000	105,000	74,000
Granted	123,000	60,000	58,000
Vested	(37,000)	(28,000)	(17,000)
Forfeited	(21,000)	(17,000)	(10,000)
Ending Balance	185,153	120,000	105,000
Expected to vest as of December 31, 2023	185,000
Aggregate Intrinsic Value
Vested	$ 14,817	$ 6,604	$ 13,803
Expected to vest as of December 31, 2023	$ 116,946