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Goodwill and Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2018
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, 2018 and 2017 are as follows:
 
 
 
Industrial
Automation
 
 
System

Test
 
 
Wireless

Test
 
 
Semiconductor

Test
 
 
Total
 
 
 
(in thousands)
 
Balance at December 31, 2016:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Goodwill
 
$
204,851
 
 
$
158,699
 
 
$
361,819
 
 
$
260,540
 
 
$
985,909
 
Accumulated impairment losses
 
 
 
 
 
(148,183
)
 
 
(353,843
)
 
 
(260,540
)
 
 
(762,566
)
 
 
 
204,851
 
 
 
10,516
 
 
 
7,976
 
 
 
 
 
 
223,343
 
Foreign currency translation adjustment
 
 
28,668
 
 
 
 
 
 
 
 
 
 
 
 
28,668
 
Balance at December 31, 2017:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Goodwill
 
 
233,519
 
 
 
158,699
 
 
 
361,819
 
 
 
260,540
 
 
 
1,014,577
 
Accumulated impairment losses
 
 
 
 
 
(148,183
)
 
 
(353,843
)
 
 
(260,540
)
 
 
(762,566
)
 
 
 
233,519
 
 
 
10,516
 
 
 
7,976
 
 
 
 
 
 
252,011
 
MiR acquisition
 
 
135,976
 
 
 
 
 
 
 
 
 
 
 
 
135,976
 
Energid acquisition
 
 
14,394
 
 
 
 
 
 
 
 
 
 
 
 
14,394
 
Foreign currency translation adjustment
 
 
(20,531
)
 
 
 
 
 
 
 
 
 
 
 
(20,531
)
Balance at December 31, 2018:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Goodwill
 
 
363,358
 
 
 
158,699
 
 
 
361,819
 
 
 
260,540
 
 
 
1,144,416
 
Accumulated impairment losses
 
 
 
 
 
(148,183
)
 
 
(353,843
)
 
 
(260,540
)
 
 
(762,566
)
 
 
$
363,358
 
 
$
10,516
 
 
$
7,976
 
 
$
 
 
$
381,850
 
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, 2018
 
 
 
Gross
Carryin
g
Amount (1)(2)
 
 
Accumulated
Amortization (2)
 
 
Foreign
Currency
Translation
Adjustment
 
 
Net
Carrying
Amount
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(in thousan
ds)
 
Developed technology
 
$
336,308
 
 
$
(252,080
)
 
$
(4,079
)
 
$
80,149
 
Customer relationships
 
 
97,153
 
 
 
(83,448
)
 
 
(340
)
 
 
13,365
 
Tradenames and trademarks
 
 
64,420
 
 
 
(31,653
)
 
 
(799
)
 
 
31,968
 
Non-compete agreement
 
 
320
 
 
 
(320
)
 
 
 
 
 
 
Backlog
 
 
30
 
 
 
(30
)
 
 
 
 
 
 
Total intangible assets
 
$
498,231
 
 
$
(367,531
)
 
$
(5,218
)
 
$
125,482
 
 
 
 
 
December 31, 2017
 
 
 
Gross
Carrying
Amount
 
 
Accumulated
Amortization
 
 
Foreign
Currency
Translation
Adjustment
 
 
Net
Carrying
Amount
 
 
 
(in thousands)
 
Developed technology
 
$
270,877
 
 
$
(226,190
)
 
$
1,618
 
 
$
46,305
 
Customer relationships
 
 
92,741
 
 
 
(83,585
)
 
 
171
 
 
 
9,327
 
Tradenames and trademarks
 
 
50,100
 
 
 
(27,120
)
 
 
416
 
 
 
23,396
 
Non-compete agreement
 
 
320
 
 
 
(260
)
 
 
 
 
 
60
 
Total intangible assets
 
$
414,038
 
 
$
(337,155
)
 
$
2,205
 
 
$
79,088
 
 
              
Wireless Test  
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)
 
2019
  
$
38,496
 
2020
  
 
24,186
 
2021
  
 
13,945
 
2022
  
 
13,052
 
2023
  
 
12,785
 
Thereafter
  
 
23,018