Fair Value Measurements - Summary of Companies unrealized and realized gains and losses on investments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	$ 1,719	$ (2,625)	$ 1,143
Realized gains/(losses)	(149)		89
Corporate Debt [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	(11)
Realized gains/(losses)	(11)		89
U.S. Treasuries [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	446	(534)	(111)
Mutual Funds Held In Rabbi Trust [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	1,284	$ (2,091)	1,254
Realized gains/(losses)	$ (138)		$ 0