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Consolidated Condensed Statements Of Income (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Apr. 29, 2012
May 01, 2011
Consolidated Condensed Statements Of Income [Abstract]    
Net sales $ 116,642 $ 122,371
Cost of sales 61,305 48,517
Gross profit 55,337 73,854
Operating costs and expenses:    
Selling, general and administrative 44,818 26,705
Product development and engineering 24,083 18,525
Intangible amortization and impairments 5,578 2,102
Total operating costs and expenses 74,479 47,332
Operating (loss) income (19,142) 26,522
Interest and other expense, net (1,629) (440)
(Loss) income before taxes (20,771) 26,082
(Benefit) provision for taxes (22,980) 3,500
Net Income $ 2,209 $ 22,582
Earnings per share:    
Basic $ 0.03 $ 0.35
Diluted $ 0.03 $ 0.34
Weighted average number of shares used in computing earnings per share:    
Basic 65,282 64,552
Diluted 67,233 67,123