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Goodwill and Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2022
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, 2022, categorized by reportable segments, is as follows (in thousands):
Clear AlignerSystems and ServicesTotal
Balance as of December 31, 2021$112,208 $306,339 $418,547 
Foreign currency translation adjustments
(3,804)(24,643)(28,447)
Balance as of June 30, 2022$108,404 $281,696 $390,100 
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, 2022
Accumulated
Amortization
Accumulated
Impairment Loss
Net Carrying
Value as of
June 30, 2022
Existing technology10$104,531 $(27,640)$(4,328)$72,563 
Customer relationships1021,500 (4,838)— 16,662 
Trademarks and tradenames1017,200 (5,466)(4,179)7,555 
Patents 86,511 (4,891)— 1,620 
$149,742 $(42,835)$(8,507)98,400 
Foreign currency translation adjustments(4,583)
Total intangible assets, net 1
$93,817 
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 LossNet Carrying
Value as of
December 31, 2021
Existing technology10$104,531 $(22,495)$(4,328)$77,708 
Customer relationships1155,000 (25,891)(10,751)18,358 
Trademarks and tradenames1017,200 (4,547)(4,179)8,474 
Patents86,511 (4,495)— 2,016 
$183,242 $(57,428)$(19,258)106,556 
Foreign currency translation adjustments3,153 
Total intangible assets, net$109,709 
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, 2022 is as follows (in thousands):

Fiscal Year Ending December 31,Amortization
Remainder of 2022$7,536 
202314,997 
202413,831 
202513,455 
202612,849 
Thereafter35,732 
Total$98,400