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Goodwill and Intangible Assets
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Goodwill and Intangible Assets
Goodwill

The change in the carrying value of goodwill for the year ended December 31, 2024 and 2023, categorized by reportable segment, is as follows (in thousands):
Clear AlignerSystems and ServicesTotal
Balance as of December 31, 2022
$109,480 $298,071 $407,551 
Foreign currency translation adjustments1,606 10,373 11,979 
Balance as of December 31, 2023
111,086 308,444 419,530 
Additions from acquisition47,576 — 47,576 
Foreign currency translation adjustments(6,017)(18,459)(24,476)
Balance as of December 31, 2024
$152,645 $289,985 $442,630 

We completed our annual goodwill impairment assessment in 2024 and 2023 and determined there were no impairments.

Finite-Lived Intangible Assets

Acquired finite-lived intangible assets were as follows, excluding intangible assets that were fully amortized (in thousands):
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 technology11$146,651 $(52,238)$— $94,413 
Customer relationships1021,500 (10,079)— 11,421 
Trademarks and tradenames1016,600 (9,255)(4,122)3,223 
Patents 12480 (280)— 200 
$185,231 $(71,852)$(4,122)109,257 
Foreign currency translation adjustments(5,769)
Total intangible assets, net $103,488 


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 technology10$112,051 $(45,331)$(4,328)$62,392 
Customer relationships1021,500 (8,063)— 13,437 
Trademarks and tradenames1016,600 (7,605)(4,122)4,873 
Patents86,511 (6,082)— 429 
$156,662 $(67,081)$(8,450)81,131 
Foreign currency translation adjustments987 
Total intangible assets, net $82,118 

Of the $146.7 million recorded as Existing technology intangible assets as of December 31, 2024, $47.0 million was acquired during the first quarter of 2024 as part of the Cubicure Acquisition. The existing technology acquired in the Cubicure Acquisition had an estimated useful life of 13 years, which had the effect of increasing the weighted average amortization period from approximately 10 years as of December 31, 2023 to approximately 11 years as of December 31, 2024. Refer to Note 5. “Business Combination”.

For the year ended December 31, 2024 and 2023, we did not identify any impairment triggering events that would indicate that the carrying value of our finite-lived intangible assets was not recoverable.
The total estimated future amortization expense for these acquired finite-lived intangible assets as of December 31, 2024 is as follows (in thousands):

Fiscal YearAmortization
2025$18,651 
202617,969 
202715,607 
202814,505 
202914,505 
Thereafter28,020 
Total amortization
$109,257 
Amortization expense was $18.9 million, $16.4 million and $16.0 million for the year ended December 31, 2024, 2023 and 2022, respectively.