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Goodwill and Intangible Assets - Change in Carrying Value of Goodwill (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2022
USD ($)
Goodwill [Roll Forward]  
Balance as of December 31, 2021 $ 418,547
Foreign currency translation adjustments (28,447)
Balance as of June 30, 2022 390,100
Clear Aligner  
Goodwill [Roll Forward]  
Balance as of December 31, 2021 112,208
Foreign currency translation adjustments (3,804)
Balance as of June 30, 2022 108,404
Systems and Services  
Goodwill [Roll Forward]  
Balance as of December 31, 2021 306,339
Foreign currency translation adjustments (24,643)
Balance as of June 30, 2022 $ 281,696