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Goodwill and Acquired Intangible Assets | 3 Months Ended
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Apr. 02, 2023
Goodwill and Acquired Intangible Assets | L . 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. In the three months ended April 2, 2023, there were no interim indicators of impairment. 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 April 2, 2023, were as follows:
|  | Robotics |  |  | Wireless Test |  |  | Semiconductor Test |  |  | System Test |  |  | Total |
|  | (in thousands) |
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 |
Foreign currency translation adjustment |  |  | 6,609 |  |  |  | — |  |  |  | 24 |  |  |  | — |  |  |  | 6,633 |
Balance at April 2, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 389,775 |  |  |  | 361,819 |  |  |  | 262,101 |  |  |  | 158,699 |  |  |  | 1,172,394 |
Accumulated impairment losses |  |  | — |  |  |  | (353,843 | ) |  |  | (260,540 | ) |  |  | (148,183 | ) |  |  | (762,566 | )
|  | $ | 389,775 |  |  | $ | 7,976 |  |  | $ | 1,561 |  |  | $ | 10,516 |  |  | $ | 409,828 |
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:
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Foreign Currency Translation Adjustment |  |  | Net Carrying Amount |
|  | (in thousands) |
Balance at April 2, 2023 |  |  |  |
Developed technology |  | $ | 270,967 |  |  | $ | (237,269 | ) |  | $ | (5,560 | ) |  | $ | 28,138 |
Customer relationships |  |  | 57,739 |  |  |  | (51,756 | ) |  |  | 184 |  |  |  | 6,167 |
Tradenames and trademarks |  |  | 59,387 |  |  |  | (43,101 | ) |  |  | (1,345 | ) |  |  | 14,941 |
Total intangible assets |  | $ | 388,093 |  |  | $ | (332,126 | ) |  | $ | (6,721 | ) |  | $ | 49,246 |
Balance, December 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |
Aggregate intangible asset amortization expense for the three months ended April 2, 2023 and April 3, 2022 was $4.8 million and $5.1 million, respectively. Estimated intangible asset amortization expense for each of the five succeeding fiscal years and thereafter is as follows:
Year |  | Amortization Expense |
|  | (in thousands) |
2023 |  | $ | 14,219 |
2024 |  |  | 18,749 |
2025 |  |  | 11,320 |
2026 |  |  | 2,371 |
2027 |  |  | 1,155 |
Thereafter |  |  | 1,432 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI https://asc.fasb.org/topic&trid=2144416 + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration