Fair Value Measurements - Summary of Companies unrealized and realized gains and losses on investments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	$ 19	$ 1,719	$ (2,625)
Realized gains/(losses)	(324)	(149)	0
Securities sold, not yet purchased gross realized gains	174	0	0
Corporate Debt [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	(328)	(11)	0
Realized gains/(losses)	4	(11)	0
U.S. Treasuries [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	(1,025)	446	(534)
Mutual Funds Held In Rabbi Trust [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	1,372	1,284	(2,091)
Realized gains/(losses)	$ (328)	$ (138)	$ 0