Goodwill and Intangible Assets - Change in Carrying Value of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2025 USD ($)
Goodwill [Roll Forward]
Balance as of December 31, 2024	$ 442,630
Foreign currency translation adjustments	48,886
Balance as of September 30, 2025	491,516
Clear Aligner
Goodwill [Roll Forward]
Balance as of December 31, 2024	152,645
Foreign currency translation adjustments	11,547
Balance as of September 30, 2025	164,192
Systems and Services
Goodwill [Roll Forward]
Balance as of December 31, 2024	289,985
Foreign currency translation adjustments	37,339
Balance as of September 30, 2025	$ 327,324