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Goodwill and Intangible Assets - Change in the Carrying Value of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning Balance	$ 407,551	$ 418,547
Additions from acquisition		8,729
Foreign currency translation adjustments	11,979	(19,725)
Ending Balance	419,530	407,551
Clear Aligner
Goodwill [Roll Forward]
Beginning Balance	109,480	112,208
Additions from acquisition		0
Foreign currency translation adjustments	1,606	(2,728)
Ending Balance	111,086	109,480
Systems and Services
Goodwill [Roll Forward]
Beginning Balance	298,071	306,339
Additions from acquisition		8,729
Foreign currency translation adjustments	10,373	(16,997)
Ending Balance	$ 308,444	$ 298,071

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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