Equity - Tax Effects Related to the Change in Each Component of Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Equity [Abstract]
Unrealized (loss) gain on available-for-sale securities, Before-Tax Amount	$ (13)			$ 836					$ (181)	$ 964
Unrealized (loss) gain on available-for-sale securities, Tax (Expense) Benefit	3			(201)					47	(231)
Unrealized (loss) gain on available-for-sale securities, Net-of-Tax Amount	(10)			635					(134)	733
Reclassification adjustment for amounts related to available-for-sale investments included in net gain (loss), Before-Tax Amount	13			(321)					181	(367)
Reclassification adjustment for amounts related to available-for-sale investments included in net gain (loss), Tax (Expense) Benefit	(3)			77					(47)	88
Reclassification adjustment for amounts related to available-for-sale investments included in net gain (loss), Net-of-Tax Amount	10			(244)					134	(279)
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net (loss) gain, Before-Tax Amount	158			(120)					61	(36)
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net (loss) gain, Tax (Expense) Benefit	(49)			37					(19)	11
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net (loss) gain, Net-of-Tax Amount	109			(83)					42	(25)
Foreign currency translation adjustment, Before-Tax Amount	18,988			(29,715)					(130)	(14,095)
Foreign currency translation adjustment, Net-of-Tax Amount	18,988	$ (1,374)	$ (17,744)	(29,715)	$ 6,941	$ 8,679	$ (19,118)	$ 15,620	(130)	(14,095)	$ 22,757
Total Other Comprehensive (Loss) Income, Before-Tax Amount	19,146			(29,320)					(69)	(13,534)
Total Other Comprehensive (Loss) Income, Tax (Expense) Benefit	(49)			(87)					(19)	(132)
Other Comprehensive Income (Loss), net of tax	$ 19,097	$ (1,381)	$ (17,804)	$ (29,407)	$ 6,958	$ 8,783	$ (19,185)	$ 15,741	$ (88)	$ (13,666)	$ 21,721

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