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Segment Information - Income by Segment and Reconciliation to Income Before Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 29, 2018 | Apr. 30, 2017
Segment Reporting Information [Line Items] |  |
Operating income | $ (3,097) | $ 18,256
Items to reconcile segment operating income to consolidated income before taxes |  |
Share-based compensation | 35,516 | 13,286
Intangible amortization | 6,961 | 6,286
Interest expense, net | 2,190 | 2,046
Non-operating expense, net | (190) | 632
(Loss) income before taxes and equity in net losses of equity method investments | (5,097) | 15,578
Corporate, Non-Segment [Member] |  |
Items to reconcile segment operating income to consolidated income before taxes |  |
Share-based compensation | 35,516 | 13,286
Intangible amortization | 6,961 | 6,286
Other non-segment related expenses | 1,432 | 1,204
Amortization of fair value adjustments related to acquired property, plant and equipment | 0 | 190
Interest expense, net | 2,190 | 2,046
Non-operating expense, net | (190) | 632
Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Operating income | 40,812 | 39,222
Semiconductor Products Group [Member] |  |
Segment Reporting Information [Line Items] |  |
Operating income | $ 40,812 | $ 39,222

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