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Note 12 - Segment Information - Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Apr. 01, 2017
Revenue |  | $ 417,813 | $ 285,441
Depreciation and amortization |  | 23,612 | 15,072
Operating income |  | 37,571 | 48,852
Interest expense |  | 5,423 | 3,120
Foreign exchange loss (gain) |  | (10,555) | (1,557)
Other income, net |  | (1,943) | (139)
Income before income taxes |  | 44,646 | 47,428
Electronics [Member] |  |  |
Revenue |  | 264,411 | 153,767
Depreciation and amortization |  | 13,678 | 8,387
Operating income |  | 53,964 | 35,206
Automotive [Member] |  |  |
Revenue |  | 126,131 | 107,839
Depreciation and amortization |  | 5,970 | 5,371
Operating income |  | 18,390 | 15,065
Industrial [Member] |  |  |
Revenue |  | 27,271 | 23,835
Depreciation and amortization |  | 1,460 | 1,314
Operating income |  | 4,709 | 106
Other Segments [Member] |  |  |
Depreciation and amortization |  | 2,504 |
Operating income | [1] | $ (39,492) | $ (1,525)
[1] | For the first quarter of 2018, "Other" Operating income (loss) of $39.5 million consists of $38.6 million in acquisition and integration costs associated with the Company's 2018 acquisition of IXYS ($18.4 million included in Cost of sales ("COS"), of which $17.9 million relates to fair value inventory adjustments, $16.1 million included in Selling, general, and administrative expenses ("SG&A), $1.6 million in Research and development ("R&D") $2.5 million in backlog amortization expense), $0.8 million in restructuring costs ($0.5 million included in COS and $0.3 million in SG&A) and $0.1 million in year acquisition and integration costs associated with the Company's 2017 acquisitions in SG&A.

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