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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The change in the carrying value of goodwill for the years ended December 31, 2025 and 2024, categorized by reportable segment, is as follows (in thousands):
|  | Clear Aligner |  | Systems and Services |  | Total
Balance as of December 31, 2023 |  | $ | 111,086 |  |  | $ | 308,444 |  |  | $ | 419,530 |
Additions from acquisition |  | 47,576 |  |  | — |  |  | 47,576 |
Foreign currency translation adjustments |  | (6,017) |  |  | (18,459) |  |  | (24,476) |
Balance as of December 31, 2024 |  | 152,645 |  |  | 289,985 |  |  | 442,630 |
Foreign currency translation adjustments |  | 11,610 |  |  | 37,593 |  |  | 49,203 |
Balance as of December 31, 2025 |  | $ | 164,255 |  |  | $ | 327,578 |  |  | $ | 491,833 |
Schedule of Amortized Intangible Assets | Acquired finite-lived intangible assets, excluding intangibles that were fully amortized, are as follows (in thousands):
|  | Weighted Average Amortization Period (in years) |  | Gross Carrying Amount as of December 31, 2025 |  | Accumulated Amortization |  | Accumulated Impairment Loss |  | Net Carrying Value as of December 31, 2025
Existing technology |  | 11 |  | $ | 146,651 |  |  | $ | (67,138) |  |  | $ | — |  |  | $ | 79,513 |
Customer relationships |  | 10 |  | 21,500 |  |  | (12,363) |  |  | — |  |  | 9,137 |
Trademarks and tradenames 1 |  | 7 |  | 9,800 |  |  | (8,050) |  |  | — |  |  | 1,750 |
Patents |  | 12 |  | 480 |  |  | (320) |  |  | — |  |  | 160 |
|  |  |  | $ | 178,431 |  |  | $ | (87,871) |  |  | $ | — |  |  | $ | 90,560 |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  |  | 3,373 |
Total intangible assets, net |  |  |  |  |  |  |  |  |  | $ | 93,933 |
1 The Weighted Average Amortization Period decreased from 10 years to 7 years due to an intangible asset with a useful life of 15 years becoming fully amortized in 2025.
|  | Weighted Average Amortization Period (in years) |  | Gross Carrying Amount as of December 31, 2024 |  | Accumulated Amortization |  | Accumulated Impairment Loss |  | Net Carrying Value as of December 31, 2024
Existing technology |  | 11 |  | $ | 146,651 |  |  | $ | (52,238) |  |  | $ | — |  |  | $ | 94,413 |
Customer relationships |  | 10 |  | 21,500 |  |  | (10,079) |  |  | — |  |  | 11,421 |
Trademarks and tradenames |  | 10 |  | 16,600 |  |  | (9,255) |  |  | (4,122) |  |  | 3,223 |
Patents |  | 12 |  | 480 |  |  | (280) |  |  | — |  |  | 200 |
|  |  |  | $ | 185,231 |  |  | $ | (71,852) |  |  | $ | (4,122) |  |  | $ | 109,257 |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  |  | (5,769) |
Total intangible assets, net |  |  |  |  |  |  |  |  |  | $ | 103,488 |
Schedule of Future Amortization for Finite-Lived Intangible Assets | The total estimated future amortization expense for these acquired finite-lived intangible assets as of December 31, 2025 is as follows (in thousands):
Fiscal Year |  | Amortization
2026 |  | $ | 17,922 |
2027 |  | 15,607 |
2028 |  | 14,505 |
2029 |  | 14,505 |
2030 |  | 6,328 |
Thereafter |  | 21,693 |
Total |  | $ | 90,560 |

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