Stock-Based Compensation (Allocation Of Stock-Based Compensation) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 29, 2012	May 01, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	$ 5,326	$ 7,487
Net change in stock-based compensation capitalized into inventory	66	(84)
Cost Of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	231	279
Selling, General And Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	3,224	5,618
Product Development And Engineering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	$ 1,871	$ 1,590