Fair Value Measurements - Summary of Companies Unrealized and Realized Gains and Losses on Investments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	$ 2,409	$ 19	$ 1,719
Realized gains/(losses)	1,264	(324)	(149)
Securities sold, not yet purchased gross realized gains	0	174	0
Corporate Debt [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	669	(328)	(11)
Realized gains/(losses)	5	4	(11)
U.S. Treasuries [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	1,733	(1,025)	446
Mutual Funds Held In Rabbi Trust [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	7	1,372	1,284
Realized gains/(losses)	$ 1,259	$ (328)	$ (138)