Marketable Securities - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Marketable Securities [Line Items]
Marketable securities	$ 188,000,000		$ 188,000,000		$ 197,800,000
Marketable securities unrealized loss, Less than twelve months	995,500,000		995,500,000		463,500,000
Marketable securities unrealized loss, more than twelve months	229,200,000		229,200,000		138,400,000
Marketable securities totaling	11,216,000		11,216,000		1,973,000
Marketable securities unrealized loss	2,900,000		2,900,000
Marketable securities unrealized gain					$ 1,900,000
Available-for-sale debt securities remaining maturities greater than thirty months	0		0
Other Comprehensive Income (Loss) [Member]
Marketable Securities [Line Items]
Unrealized loss, net	$ (1,300,000)	$ 500,000	$ (4,800,000)	$ 6,700,000