Accumulated Other Comprehensive (Loss) Income - 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, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, Value	$ 204,422	$ 204,115	$ 227,522	$ 203,466	$ 230,459	$ 249,001	$ 227,522	$ 249,001
Amount reclassified from accumulated other comprehensive income (loss)								(39)
Net current period other comprehensive loss	(101)	(324)	(1,365)	6	(17)	(61)
Balance, Value	184,820	204,422	204,115	207,191	203,466	230,459	184,820	207,191
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, Value	(2,047)	(1,723)	(358)	(5)	12	73	(358)	73
Other comprehensive loss before reclassifications							(1,790)	(33)
Amount reclassified from accumulated other comprehensive income (loss)								(39)
Net current period other comprehensive loss	(101)	(324)	(1,365)	6	(17)	(61)	(1,790)	(72)
Balance, Value	$ (2,148)	$ (2,047)	$ (1,723)	$ 1	$ (5)	$ 12	$ (2,148)	$ 1