Accumulated Other Comprehensive Loss - Summary of Changes in Accumulated Other Comprehensive (Loss) Income, Net of Tax, from Unrealized Gains (Losses) on Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Loss [Line Items]
Balance, Value	$ 108,932	$ 136,598	$ 158,779	$ 204,422	$ 204,115	$ 227,522	$ 158,779	$ 227,522
Amount reclassified from accumulated other comprehensive loss	0			0			0	0
Net current period other comprehensive income (loss)	291	371	571	(101)	(324)	(1,365)
Balance, Value	85,642	108,932	136,598	184,820	204,422	204,115	85,642	184,820
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss [Line Items]
Balance, Value	(730)	(1,101)	(1,672)	(2,047)	(1,723)	(358)	(1,672)	(358)
Other comprehensive income (loss) before reclassifications							1,233	(1,790)
Net current period other comprehensive income (loss)	291	371	571	(101)	(324)	(1,365)	1,233	(1,790)
Balance, Value	$ (439)	$ (730)	$ (1,101)	$ (2,148)	$ (2,047)	$ (1,723)	$ (439)	$ (2,148)