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Goodwill and Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2022
Changes in Carrying Amount of Goodwill by Segment
The changes in the carrying amount of goodwill by reportable segments for the years ended December 31, 2022 and 2021 are as follows:
 
    
Robotics
    
Wireless

Test
    
Semiconductor

Test
    
System

Test
    
Total
  
                
(in thousands)
              
Balance at December 31, 2020:
                                         
Goodwill
    $ 433,752     $ 361,819     $ 262,155     $ 158,699     $ 1,216,425  
Accumulated impairment losses
      —         (353,843 )      (260,540 )      (148,183 )      (762,566 ) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
       433,752       7,976       1,615       10,516       453,859  
Foreign currency translation adjustment
      (27,781 )      —         (54 )      —         (27,835 ) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
Balance at December 31, 2021:
                                         
Goodwill
      405,971       361,819       262,101       158,699       1,188,590  
Accumulated impairment losses
      —         (353,843 )      (260,540 )      (148,183 )      (762,566 ) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
       405,971       7,976       1,561       10,516       426,024  
Foreign currency translation adjustment
      (22,805 )      —         (24 )      —         (22,829 ) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
Balance at December 31, 2022:
                                         
Goodwill
      383,166       361,819       262,077       158,699       1,165,761  
Accumulated impairment losses
      —         (353,843 )      (260,540 )      (148,183 )      (762,566 ) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
     $ 383,166     $ 7,976     $ 1,537     $ 10,516     $ 403,195  
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
Schedule of Amortizable Intangible Assets
Amortizable intangible assets consist of the following and are included in intangible assets, net on the balance sheets:
 
    
December 31, 2022
  
    
Gross

Carrying

Amount (1)
     
Accumulated

Amortization (1)
     
Foreign
Currency
Translation
Adjustment
     
Net

Carrying

Amount
  
    
(in thousands)
  
Developed technology
    $ 270,967      $ (234,208 )     $ (5,935 )     $ 30,824  
Customer relationships
      57,739        (51,186 )       172        6,725  
Tradenames and trademarks
      59,387        (41,930 )       (1,528 )       15,929  
    
 
 
     
 
 
     
 
 
     
 
 
  
Total intangible assets
    $ 388,093      $ (327,324 )     $ (7,291 )     $ 53,478  
    
 
 
     
 
 
     
 
 
     
 
 
  
 
    
December 31, 2021
  
    
Gross

Carrying

Amount
     
Accumulated

Amortization
     
Foreign Currency
Translation
Adjustment
     
Net

Carrying

Amount
  
    
(in thousands)
  
Developed technology
    $ 272,547      $ (223,413 )     $ (4,093 )     $ 45,041  
Customer relationships
      57,739        (48,921 )       209        9,027  
Tradenames and trademarks
      59,387        (37,237 )       (583 )       21,567  
    
 
 
     
 
 
     
 
 
     
 
 
  
Total intangible assets
    $ 389,673      $ (309,571 )     $ (4,467 )     $ 75,635  
    
 
 
     
 
 
     
 
 
     
 
 
  
 
(1)
In 2022, $1.6 million of amortizable intangible assets became fully amortized and have been eliminated from the gross carrying amount and accumulated amortization.
Schedule of Estimated Intangible Assets Amortization Expense Estimated intangible assets amortization expense for each of the five succeeding fiscal years is as follows:
 
Year
   
Amortization Expense
  
    
(in thousands)
  
2023
    $ 18,835  
2024
      18,527  
2025
      11,230  
2026
      2,350  
2027
      1,134  
Thereafter
      1,402