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Segment Information - Income by Segment and Reconciliation to Income Before Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	May 02, 2021	Apr. 26, 2020
Segment Reporting Information [Line Items]
Operating income (loss)	$ 27,969	$ 15,768
Items to reconcile segment operating income to consolidated income before taxes:
Share-based compensation	11,839	9,379
Intangible amortization	1,298	2,840
Investment impairments and credit loss reserves	246	3,630
Changes in the fair value of contingent earn-out obligations	0	(33)
Interest expense	1,199	1,559
Non-operating income, net	(94)	(423)
Income before taxes and equity in net gains (losses) of equity method investments	26,618	11,002
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	41,469	28,098
Corporate, Non-Segment
Items to reconcile segment operating income to consolidated income before taxes:
Share-based compensation	11,839	9,379
Intangible amortization	1,298	2,840
Investment impairments and credit loss reserves	246	3,630
Changes in the fair value of contingent earn-out obligations	0	(33)
Litigation cost, net of recoveries	540	146
Transaction and integration related	(177)	(2)
Interest expense	1,199	1,559
Non-operating income, net	(94)	(423)
Semiconductor Products Group
Segment Reporting Information [Line Items]
Operating income (loss)	$ 41,469	$ 28,098

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