Consolidated Condensed Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended
May 01, 2011	May 02, 2010
Consolidated Condensed Statements of Operations
Net sales	$ 122,371	$ 101,880
Cost of sales	48,517	44,833
Gross profit	73,854	57,047
Operating costs and expenses:
Selling, general and administrative	26,705	26,351
Product development and engineering	18,525	15,303
Intangible amortization	2,102	2,405
Total operating costs and expenses	47,332	44,059
Operating income	26,522	12,988
Interest and other (expense) income, net	(440)	197
Income before taxes	26,082	13,185
Provision for taxes	3,500	2,383
Net Income	$ 22,582	$ 10,802
Earnings per share:
Basic	$ 0.35	$ 0.18
Diluted	$ 0.34	$ 0.17
Weighted average number of shares used in computing earnings per share:
Basic	64,552	61,420
Diluted	67,123	63,181

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