Accumulated Other Comprehensive Loss ("AOCL") - Schedule of Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		$ 230,931	$ 240,265	$ 222,746	$ 221,656	$ 240,265	$ 221,656
Foreign currency translation		(211)		746		(2,179)	1,952
Unrealized gain (loss), net of tax		(6)	(8)	4	(7)
Ending Balance		237,054	230,931	231,645	222,746	237,054	231,645
Marketable Investments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(54)	(60)	(126)	(159)	(60)	(159)
Foreign currency translation	[1]	0		0		0	0
Unrealized gain (loss), net of tax		18		(11)		24	22
Ending Balance		(36)	(54)	(137)	(126)	(36)	(137)
Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(6,479)	(4,511)	(6,553)	(7,759)	(4,511)	(7,759)
Foreign currency translation	[1]	(211)		746		(2,179)	1,952
Unrealized gain (loss), net of tax		0		0		0	0
Ending Balance		(6,690)	(6,479)	(5,807)	(6,553)	(6,690)	(5,807)
Total AOCL [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(6,533)	(4,571)	(6,679)	(7,918)	(4,571)	(7,918)
Foreign currency translation	[1]	(211)		746		(2,179)	1,952
Unrealized gain (loss), net of tax		18		(11)		24	22
Ending Balance		$ (6,726)	$ (6,533)	$ (5,944)	$ (6,679)	$ (6,726)	$ (5,944)

[1] The Company does not record tax provisions or benefits for the net changes in foreign currency translation adjustments as it intends to permanently reinvest undistributed earnings of its foreign subsidiaries.