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Other Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2020
Other Intangible Assets [Abstract]  
Indefinite Life Intangible Assets
Other intangible assets consist of the following (U.S. dollars in thousands):

 
Carrying Amount at December 31,
 
   
2020
   
2019
 
Indefinite life intangible assets:
           
Trademarks and trade names
 
$
24,599
   
$
24,599
 
Other indefinite lived intangibles
   
3,763
     
3,763
 
   
$
28,362
   
$
28,362
 
Finite Life Intangible Assets
 
December 31, 2020
   
December 31, 2019
   
Finite life intangible assets:
 
Gross Carrying
Amount
   
Accumulated
Amortization
   
Gross Carrying
Amount
   
Accumulated
Amortization
 
Weighted-average
Amortization Period
Scanner technology
 
$
40,716
   
$
40,716
   
$
46,482
   
$
45,724
 
18 years
Developed technology
   
32,546
     
21,680
     
22,500
     
20,856
 
16 years
Sales force network
   
11,598
     
11,598
     
11,598
     
11,598
 
15 years
Trademarks
   
6,145
     
2,938
     
5,938
     
2,462
 
11 years
Other
   
71,095
     
23,998
     
92,331
     
46,250
 
10 years
   
$
162,100
   
$
100,930
   
$
178,849
   
$
126,890
 
14 years
Future Amortization Expense
The estimated annual amortization expense for each of the five succeeding fiscal years are as follows (U.S. dollars in thousands):

Year Ending December 31,
     
2021
 
$
11,227
 
2022
   
10,090
 
2023
   
9,495
 
2024
   
8,512
 
2025
   
7,420