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Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Goodwill by Reportable Segment | The change in the carrying value of goodwill for the nine months ended September 30, 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 | 963 |  |  | 3,443 |  |  | 4,406 |
Balance as of September 30, 2024 | $ | 159,625 |  |  | $ | 311,887 |  |  | $ | 471,512 |
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 September 30, 2024 |  | Accumulated Amortization |  | Accumulated Impairment Loss |  | Net Carrying Value as of September 30, 2024
Existing technology | 11 |  | $ | 146,651 |  |  | $ | (48,581) |  |  | $ | — |  |  | $ | 98,070 |
Customer relationships | 10 |  | 21,500 |  |  | (9,675) |  |  | — |  |  | 11,825 |
Trademarks and tradenames | 10 |  | 16,600 |  |  | (8,759) |  |  | (4,122) |  |  | 3,719 |
Patents | 12 |  | 480 |  |  | (270) |  |  | — |  |  | 210 |
|  |  | $ | 185,231 |  |  | $ | (67,285) |  |  | $ | (4,122) |  |  | 113,824 |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  | 2,081 |
Total intangible assets, net |  |  |  |  |  |  |  |  | $ | 115,905 |
| Weighted Average Amortization Period (in years) |  | Gross Carrying Amount as of December 31, 2023 |  | Accumulated Amortization |  | Accumulated Impairment Loss |  | Net Carrying Value as of December 31, 2023
Existing technology | 10 |  | $ | 112,051 |  |  | $ | (45,331) |  |  | $ | (4,328) |  |  | $ | 62,392 |
Customer relationships | 10 |  | 21,500 |  |  | (8,063) |  |  | — |  |  | 13,437 |
Trademarks and tradenames | 10 |  | 16,600 |  |  | (7,605) |  |  | (4,122) |  |  | 4,873 |
Patents | 8 |  | 6,511 |  |  | (6,082) |  |  | — |  |  | 429 |
|  |  | $ | 156,662 |  |  | $ | (67,081) |  |  | $ | (8,450) |  |  | 81,131 |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  | 987 |
Total intangible assets, net |  |  |  |  |  |  |  |  | $ | 82,118 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | The total estimated annual future amortization expense for these acquired intangible assets as of September 30, 2024, is as follows (in thousands):
Fiscal Year Ending December 31, |  | Amortization
Remainder of 2024 |  | $ | 4,643 |
2025 |  | 18,574 |
2026 |  | 17,969 |
2027 |  | 15,607 |
2028 |  | 14,505 |
2029 |  | 14,505 |
Thereafter |  | 28,021 |
Total |  | $ | 113,824 |

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