Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 30, 2016	Oct. 25, 2015	Oct. 30, 2016	Oct. 25, 2015
Net sales	$ 137,185	$ 115,810	$ 404,241	$ 371,610
Cost of sales	56,120	46,226	162,877	148,050
Gross profit	81,065	69,584	241,364	223,560
Operating costs and expenses:
Selling, general and administrative	35,116	30,747	101,654	102,383
Product development and engineering	25,600	26,855	77,097	84,771
Intangible amortization	6,286	6,308	19,017	18,648
Gain on disposition of business operations	(25,036)	0	(25,036)	0
Changes in the fair value of contingent earn-out obligations	0	(14,186)	(162)	(13,618)
Restructuring charge	0	962	0	4,526
Total operating costs and expenses	41,966	50,686	172,570	196,710
Operating income	39,099	18,898	68,794	26,850
Interest expense, net	(1,890)	(1,964)	(5,857)	(5,698)
Non-operating expense, net	(690)	(777)	(871)	(1,152)
Income before taxes	36,519	16,157	62,066	20,000
Provision for taxes	5,743	5,453	15,424	9,750
Net income	$ 30,776	$ 10,704	$ 46,642	$ 10,250
Earnings per share:
Basic (in dollars per share)	$ 0.47	$ 0.16	$ 0.71	$ 0.16
Diluted (in dollars per share)	$ 0.46	$ 0.16	$ 0.71	$ 0.15
Weighted average number of shares used in computing earnings per share:
Basic (in shares)	65,549	65,117	65,331	65,920
Diluted (in shares)	66,206	65,217	65,899	66,251