Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 30, 2022	Jan. 31, 2021	Jan. 26, 2020
Net sales	$ 740,858	$ 595,117	$ 547,512
Cost of sales	274,777	231,568	210,828
Gross profit	466,081	363,549	336,684
Operating costs and expenses:
Selling, general and administrative	168,210	162,832	163,106
Product development and engineering	147,925	117,529	107,368
Intangible amortization	4,942	8,265	16,546
Changes in the fair value of contingent earn-out obligations	(13)	(33)	(2,345)
Total operating costs and expenses	321,064	288,593	284,675
Operating income	145,017	74,956	52,009
Interest expense	(5,091)	(5,336)	(9,106)
Non-operating income, net	480	124	2,893
Investment impairments and credit loss reserves	(1,337)	(6,769)	(1,211)
Income before taxes and equity in net gains of equity method investments	139,069	62,975	44,585
Provision for income taxes	15,539	3,437	12,828
Net income before equity in net gains of equity method investments	123,530	59,538	31,757
Equity in net gains of equity method investments	2,115	329	109
Net income	125,645	59,867	31,866
Net loss attributable to noncontrolling interest	(19)	(36)	(5)
Net income attributable to common stockholders	$ 125,664	$ 59,903	$ 31,871
Earnings per share:
Basic (in dollars per share)	$ 1.94	$ 0.92	$ 0.48
Diluted (in dollars per share)	$ 1.92	$ 0.91	$ 0.47
Weighted average number of shares used in computing earnings per share:
Basic (in shares)	64,662	65,208	66,263
Diluted (in shares)	65,565	66,059	67,418