Stock Based Compensation (Allocation Of Stock-Based Compensation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	$ 24,020	$ 29,010	$ 19,935
Net change in stock-based compensation capitalized into inventory	(83)	(116)	58
Cost Of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	983	1,802	1,168
Selling, General And Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	15,839	19,310	13,566
Product Development And Engineering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	$ 7,198	$ 7,898	$ 5,201