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Note 4 - Goodwill and Other Intangible Assets | 3 Months Ended
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Mar. 31, 2018
Notes to Financial Statements |
Goodwill and Intangible Assets Disclosure [Text Block] | 4. Goodwill and Other Intangible Assets The amounts for goodwill and changes in the carrying value by segment for the three months ended March 31, 2018 are as follows:
(in thousands) |  | Electronics |  |  | Automotive |  |  | Industrial |  |  | Total |
As of December 30, 2017 |  | $ | 278,959 |  |  | $ | 135,829 |  |  | $ | 38,626 |  |  | $ | 453,414 |
Additions (a ) |  |  | 381,599 |  |  |  | — |  |  |  | — |  |  |  | 381,599 |
Currency translation |  |  | 2,455 |  |  |  | 3,195 |  |  |  | (89 | ) |  |  | 5,561 |
As of March 31, 2018 |  | $ | 663,013 |  |  | $ | 139,024 |  |  | $ | 38,537 |  |  | $ | 840,574 |
| (a) | The additions resulted from the acquisition of IXYS.
The components of other intangible assets at March 31, 2018 are as follows:
(in thousands, except weighted average useful life) |  | Weighted Average Useful Life |  |  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Book Value |
Patents, licenses and software |  | 10.6 |  |  |  | $ | 193,622 |  |  | $ | 64,012 |  |  | $ | 129,610 |
Distribution network |  | 12.6 |  |  |  |  | 44,473 |  |  |  | 33,434 |  |  |  | 11,039 |
Customer relationships, trademarks, and tradenames |  | 18.1 |  |  |  |  | 314,452 |  |  |  | 59,591 |  |  |  | 254,861 |
Order backlog |  | 1.0 |  |  |  |  | 12,400 |  |  |  | 2,504 |  |  |  | 9,896 |
Total |  |  |  |  |  | $ | 564,947 |  |  | $ | 159,541 |  |  | $ | 405,406 |
During the three months ended March 31, 2018, the Company recorded additions to other intangible assets of $211.6 million, related to the IXYS acquisition, the components of which were as follows:
(in thousands , except weighted average useful life ) |  | Weighted Average Useful Life |  |  | Amount |
Patents, licenses and software |  | 8.0 |  |  |  | $ | 51,500 |
Customer relationships, trademarks,and tradenames |  | 17.2 |  |  |  |  | 147,700 |
Order backlog |  | 1.0 |  |  |  |  | 12,400 |
Total |  |  |  |  |  | $ | 211,600 |
During the three months ended March 31, 2018 and April 1, 2017, the Company recorded amortization expense of $12.0 million and $5.9 million, respectively for intangible assets with definite lives. Estimated annual amortization expense related to intangible assets with definite lives as of March 31, 2018 is as follows:
(in thousands) |  | Amount |
2018 |  | $ | 54,938 |
2019 |  |  | 42,005 |
2020 |  |  | 41,747 |
2021 |  |  | 39,928 |
2022 |  |  | 38,918 |
2023 and thereafter |  |  | 197,914 |
Total |  | $ | 415,450 |

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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 http://asc.fasb.org/topic&trid=2144416 + Details
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