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Goodwill and Acquired Intangible Assets
 3 Months Ended
Mar. 31, 2019
Goodwill and Intangible Assets
O. GOODWILL AND ACQUIRED INTANGIBLE ASSETS
Goodwill
Teradyne performs its annual goodwill impairment test as required under the provisions of ASC 350-10,
“Intangibles—Goodwill and Other”
on December 31 of each fiscal year unless interim indicators of impairment exist. Goodwill is considered impaired when the net book value of a reporting unit exceeds its estimated fair value.
The changes in the carrying amount of goodwill by reportable segments for the three months ended March 31, 2019, were as follows:
 
 
 
Industrial

Automation
 
 
System

Test
 
 
Wireless

Test
 
 
Semiconductor

Test
 
 
Total
 
 
 
(in thousands)
 
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
 
Lemsys acquisition
 
 
—
 
 
 
—
 
 
 
—
 
 
 
1,145
 
 
 
1,145
 
Foreign currency translation adjustment
 
 
(3,494
)
 
 
—
 
 
 
—
 
 
 
12
 
 
 
(3,482
)
Balance at March 31, 2019
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Goodwill
 
 
359,864
 
 
 
158,699
 
 
 
361,819
 
 
 
261,697
 
 
 
1,142,079
 
Accumulated impairment losses
 
 
—
 
 
 
(148,183
)
 
 
(353,843
)
 
 
(260,540
)
 
 
(762,566
)
 
 
$
359,864
 
 
$
10,516
 
 
$
7,976
 
 
$
1,157
 
 
$
379,513
 
 
Intangible Assets
Teradyne reviews long-lived assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate.
Amortizable intangible assets consist of the following and are included in intangible assets, net on the balance sheet:
 
 
 
March 31, 2019
 
 
 
Gross

Carrying

Amount (1)
 
 
Accumulated

Amortization
 
 
Foreign
Currency

Translation

Adjustment
 
 
Net

Carrying

Amount
 
 
 
(in thousands)
 
Developed technology
 
$
337,218
 
 
$
(259,129
)
 
$
(4,812
)
 
$
73,277
 
Customer relationships
 
 
100,743
 
 
 
(85,469
)
 
 
(408
)
 
 
14,866
 
Tradenames and trademarks
 
 
64,670
 
 
 
(32,897
)
 
 
(973
)
 
 
30,800
 
Non-compete agreement
 
 
320
 
 
 
(320
)
 
 
—
 
 
 
—
 
Backlog
 
 
780
 
 
 
(349
)
 
 
(2
)
 
 
429
 
Total intangible assets
 
$
503,731
 
 
$
(378,164
)
 
$
(6,195
)
 
$
119,372
 
 
 
 
December 31, 2018
 
 
 
Gross

Carrying

Amount
 
 
Accumulated

Amortization
 
 
Foreign
Currency

Translation

Adjustment
 
 
Net

Carrying

Amount
 
 
 
(in thousands)
 
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
 
 
   
(1)
Includes $5.5 million of intangible assets
from Lemsys acquisition.
 
 
 
Aggregate intangible asset amortization expense was $10.6 million and $7.7 million, for the three months ended March 31, 2019 and April 1, 2018
, respectively.
Estimated intangible asset amortization expense for each of the five succeeding fiscal years is as follows:
 
Year
 
Amortization Expense
 
 
 
(in thousands)
 
2019 (remainder)
 
 
29,184
 
2020
 
 
24,852
 
2021
 
 
14,707
 
2022
 
 
13,815
 
2023
 
 
13,339
 
Thereafter
 
 
23,475