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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The change in the carrying value of goodwill for the year ended December 31, 2022 and 2021, categorized by reportable segments, is as follows (in thousands):
|  | Clear Aligner |  | Systems and Services |  | Total
Balance as of December 31, 2020 |  | $ | 112,691 |  |  | $ | 332,126 |  |  | $ | 444,817 |
Additions from acquisition |  | 3,646 |  |  | — |  |  | 3,646 |
Foreign currency translation adjustments |  | (4,129) |  |  | (25,787) |  |  | (29,916) |
Balance as of December 31, 2021 |  | 112,208 |  |  | 306,339 |  |  | 418,547 |
Additions from acquisition |  | — |  |  | 8,729 |  |  | 8,729 |
Foreign currency translation adjustments |  | (2,728) |  |  | (16,997) |  |  | (19,725) |
Balance as of December 31, 2022 |  | $ | 109,480 |  |  | $ | 298,071 |  |  | $ | 407,551 |
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 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.
|  | Weighted Average Amortization Period (in years) |  | Gross Carrying Amount as of December 31, 2021 |  | Accumulated Amortization |  | Accumulated Impairment Loss |  | Net Carrying Value as of December 31, 2021
Existing technology |  | 10 |  | $ | 104,531 |  |  | $ | (22,495) |  |  | $ | (4,328) |  |  | $ | 77,708 |
Customer relationships |  | 11 |  | 55,000 |  |  | (25,891) |  |  | (10,751) |  |  | 18,358 |
Trademarks and tradenames |  | 10 |  | 17,200 |  |  | (4,547) |  |  | (4,179) |  |  | 8,474 |
Patents |  | 8 |  | 6,511 |  |  | (4,495) |  |  | — |  |  | 2,016 |
|  |  |  | $ | 183,242 |  |  | $ | (57,428) |  |  | $ | (19,258) |  |  | 106,556 |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  |  | 3,153 |
Total intangible assets, net |  |  |  |  |  |  |  |  |  | $ | 109,709 |
Schedule of Future Amortization for Finite-Lived Intangible Assets | The total estimated annual future amortization expense for these acquired intangible assets as of December 31, 2022 is as follows (in thousands):
Fiscal Year |  | Amortization
2023 |  | $ | 16,501 |
2024 |  | 15,335 |
2025 |  | 14,959 |
2026 |  | 14,353 |
2027 |  | 11,992 |
Thereafter |  | 24,492 |
Total |  | $ | 97,632 |

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