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Goodwill and Acquired Intangible Assets (Tables) | 3 Months Ended
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Mar. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Carrying Amount of Goodwill by Segment | The changes in the carrying amount of goodwill by reportable segments for the three months ended March 30, 2025, were as follows:
|  | Robotics |  |  | Semiconductor Test |  |  | Product Test |  |  | Total |
|  | (in thousands) |
Balance at December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ | 375,298 |  |  | $ | 262,117 |  |  | $ | 520,518 |  |  | $ | 1,157,933 |
Accumulated impairment losses |  |  | — |  |  |  | (260,540 | ) |  |  | (502,026 | ) |  |  | (762,566 | )
Total Goodwill |  |  | 375,298 |  |  |  | 1,577 |  |  |  | 18,492 |  |  |  | 395,367 |
AET acquisition |  |  | — |  |  |  | 1,257 |  |  |  | — |  |  |  | 1,257 |
Foreign currency translation adjustment |  |  | 12,648 |  |  |  | 41 |  |  |  | — |  |  |  | 12,689 |
Balance at March 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 387,946 |  |  |  | 263,415 |  |  |  | 520,518 |  |  |  | 1,171,879 |
Accumulated impairment losses |  |  | — |  |  |  | (260,540 | ) |  |  | (502,026 | ) |  |  | (762,566 | )
Total Goodwill |  |  | 387,946 |  |  |  | 2,875 |  |  |  | 18,492 |  |  |  | 409,313 |
Schedule of Amortizable Intangible Assets | Amortizable intangible assets consist of the following and are included in intangible assets, net on the balance sheet:
|  | Gross Carrying Amount |  |  | Acquired Assets |  |  | Accumulated Amortization |  |  | Foreign Currency Translation Adjustment |  |  | Net Carrying Amount |
|  | (in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at March 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed technology |  | $ | 267,705 |  |  | $ | 2,619 |  |  | $ | (258,444 | ) |  | $ | (5,650 | ) |  | $ | 6,230 |
Customer relationships |  |  | 52,109 |  |  |  | 3,771 |  |  |  | (50,114 | ) |  |  | 204 |  |  | $ | 5,970 |
Tradenames and trademarks |  |  | 59,007 |  |  |  | — |  |  |  | (51,828 | ) |  |  | (1,408 | ) |  | $ | 5,771 |
Total intangible assets |  | $ | 378,821 |  |  | $ | 6,390 |  |  | $ | (360,386 | ) |  | $ | (6,854 | ) |  | $ | 17,971 |
Balance at December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed technology |  | $ | 267,706 |  |  | $ | — |  |  | $ | (255,448 | ) |  | $ | (5,820 | ) |  | $ | 6,438 |
Customer relationships |  |  | 52,109 |  |  |  | — |  |  |  | (49,562 | ) |  |  | 204 |  |  |  | 2,751 |
Tradenames and trademarks |  |  | 59,007 |  |  |  | — |  |  |  | (50,805 | ) |  |  | (1,464 | ) |  |  | 6,738 |
Total intangible assets |  | $ | 378,822 |  |  | $ | — |  |  | $ | (355,815 | ) |  | $ | (7,080 | ) |  | $ | 15,927 |
Schedule of Estimated Intangible Assets Amortization Expense | Estimated intangible asset amortization expense for each of the five succeeding fiscal years and thereafter is as follows:
Year |  | Amortization Expense |
|  | (in thousands) |
2025 |  | $ | 7,940 |
2026 |  |  | 3,773 |
2027 |  |  | 2,556 |
2028 |  |  | 2,475 |
2029 |  |  | 1,164 |
Thereafter |  |  | 63 |

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