Goodwill and Intangible Assets - Change in Carrying Value of Goodwill (Details) $ in Thousands	9 Months Ended
Sep. 30, 2022 USD ($)
Goodwill [Roll Forward]
Balance as of December 31, 2021	$ 418,547
Additions from acquisition	8,729
Foreign currency translation adjustments	(49,660)
Balance as of September 30, 2022	377,616
Clear Aligner
Goodwill [Roll Forward]
Balance as of December 31, 2021	112,208
Additions from acquisition	0
Foreign currency translation adjustments	(6,694)
Balance as of September 30, 2022	105,514
Systems and Services
Goodwill [Roll Forward]
Balance as of December 31, 2021	306,339
Additions from acquisition	8,729
Foreign currency translation adjustments	(42,966)
Balance as of September 30, 2022	$ 272,102

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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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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