Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 27, 2019	Jan. 28, 2018	Jan. 29, 2017
Net sales	$ 627,196	$ 587,847	$ 544,272
Cost of sales	250,174	235,876	219,410
Gross profit	377,022	351,971	324,862
Operating costs and expenses:
Selling, general and administrative	151,397	146,303	138,708
Product development and engineering	109,918	104,798	102,500
Intangible amortization	26,649	27,867	25,301
Loss (gain) on disposition of business operations	0	375	(25,513)
Changes in the fair value of contingent earn-out obligations	(9,419)	3,892	(215)
Total operating costs and expenses	278,545	283,235	240,781
Operating income	98,477	68,736	84,081
Interest expense, net	(9,202)	(7,963)	(9,300)
Non-operating income (expense), net	3,823	3,348	(1,721)
Investment impairments	(30,000)	(4,250)	0
Income before taxes and equity in net losses of equity method investments	63,098	59,871	73,060
(Benefit) provision for income taxes	(84)	23,191	18,399
Net income before equity in net losses of equity method investments	63,182	36,680	54,661
Equity in net losses of equity method investments	(126)	(254)	0
Net income	$ 63,056	$ 36,426	$ 54,661
Earnings per share:
Basic (in dollars per share)	$ 0.96	$ 0.55	$ 0.84
Diluted (in dollars per share)	$ 0.92	$ 0.54	$ 0.83
Weighted average number of shares used in computing earnings per share:
Basic (in shares)	65,982	66,027	65,427
Diluted (in shares)	68,481	67,605	66,109