Fair Value Measurements - Summary of Companies Unrealized and Realized Gains and Losses on Investments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Gain (Loss) on Securities [Line Items]
Realized gains/(losses)	$ (59)		$ (76)
Unrealized gains/(losses)	(414)	$ (1,520)	536	$ (2,567)
Corporate Debt [Member]
Gain (Loss) on Securities [Line Items]
Realized gains/(losses)			(17)
Unrealized gains/(losses)	(168)		(223)
U.S. Treasuries [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	(766)	(125)	(346)	(445)
Mutual Funds Held In Rabbi Trust [Member]
Gain (Loss) on Securities [Line Items]
Realized gains/(losses)	(59)		(59)
Unrealized gains/(losses)	$ 520	$ (1,395)	$ 1,105	$ (2,122)