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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2023
Notes To Financial Statements [Abstract] |
Summary of Goodwill by Reportable Segment | The change in the carrying value of goodwill for the six months ended June 30, 2023, categorized by reportable segments, is as follows (in thousands):
| Clear Aligner |  | Systems and Services |  | Total
Balance as of December 31, 2022 | $ | 109,480 |  |  | $ | 298,071 |  |  | $ | 407,551 |
Foreign currency translation adjustments | 959 |  |  | 6,255 |  |  | 7,214 |
Balance as of June 30, 2023 | $ | 110,439 |  |  | $ | 304,326 |  |  | $ | 414,765 |
Schedule of Amortized Intangible Assets | Acquired intangible long-lived assets were as follows, excluding intangibles that were fully amortized (in thousands):
| Weighted Average Amortization Period (in years) |  | Gross Carrying Amount as of June 30, 2023 |  | Accumulated Amortization |  | Accumulated Impairment Loss |  | Net Carrying Value as of June 30, 2023
Existing technology | 10 |  | $ | 112,051 |  |  | $ | (39,434) |  |  | $ | (4,328) |  |  | $ | 68,289 |
Customer relationships | 10 |  | 21,500 |  |  | (6,988) |  |  | — |  |  | 14,512 |
Trademarks and tradenames | 10 |  | 17,200 |  |  | (7,361) |  |  | (4,122) |  |  | 5,717 |
Patents | 8 |  | 6,511 |  |  | (5,685) |  |  | — |  |  | 826 |
|  |  | $ | 157,262 |  |  | $ | (59,468) |  |  | $ | (8,450) |  |  | 89,344 |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  | (48) |
Total intangible assets, net 1 |  |  |  |  |  |  |  |  | $ | 89,296 |
1 Also includes $33.5 million of fully amortized intangible assets related to customer relationships.
| Weighted Average Amortization Period (in years) |  | Gross Carrying Amount as of December 31, 2022 |  | Accumulated Amortization |  | Accumulated Impairment Loss |  | Net Carrying Value as of December 31, 2022
Existing technology | 10 |  | $ | 112,051 |  |  | $ | (33,537) |  |  | $ | (4,328) |  |  | $ | 74,186 |
Customer relationships | 10 |  | 21,500 |  |  | (5,913) |  |  | — |  |  | 15,587 |
Trademarks and tradenames | 10 |  | 17,200 |  |  | (6,442) |  |  | (4,122) |  |  | 6,636 |
Patents | 8 |  | 6,511 |  |  | (5,288) |  |  | — |  |  | 1,223 |
|  |  | $ | 157,262 |  |  | $ | (51,180) |  |  | $ | (8,450) |  |  | 97,632 |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  | (1,912) |
Total intangible assets, net 1 |  |  |  |  |  |  |  |  | $ | 95,720 |
1 Also includes $33.5 million of fully amortized intangible assets related to customer relationships.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | The total estimated annual future amortization expense for these acquired intangible assets as of June 30, 2023 is as follows (in thousands):
Fiscal Year Ending December 31, |  | Amortization
Remainder of 2023 |  | $ | 8,213 |
2024 |  | 15,335 |
2025 |  | 14,959 |
2026 |  | 14,353 |
2027 |  | 11,992 |
Thereafter |  | 24,492 |
Total |  | $ | 89,344 |

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