Goodwill and Intangible Assets (Schedule Of Finite-Lived Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified					9 Months Ended				9 Months Ended						9 Months Ended				9 Months Ended
	Oct. 28, 2012	Jan. 29, 2012	Oct. 28, 2012 Core Technologies [Member]	Jan. 29, 2012 Core Technologies [Member]	Oct. 28, 2012 Core Technologies [Member] Minimum [Member]	Oct. 28, 2012 Core Technologies [Member] Maximum [Member]	Oct. 28, 2012 Customer Relationships [Member]	Jan. 29, 2012 Customer Relationships [Member]	Oct. 28, 2012 Customer Relationships [Member] Minimum [Member]	Oct. 28, 2012 Customer Relationships [Member] Maximum [Member]	Oct. 28, 2012 Technology Licenses [Member]		Jan. 29, 2012 Technology Licenses [Member]		Oct. 28, 2012 Technology Licenses [Member] Minimum [Member]	Oct. 28, 2012 Technology Licenses [Member] Maximum [Member]	Oct. 28, 2012 Other Intangible Assets [Member]	Jan. 29, 2012 Other Intangible Assets [Member]	Oct. 28, 2012 Other Intangible Assets [Member] Minimum [Member]	Oct. 28, 2012 Other Intangible Assets [Member] Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 226,118	$ 81,030	$ 173,724	$ 65,900			$ 40,130	$ 12,130			$ 5,664	[1]	$ 3,000	[1]			$ 6,600	$ 0
Accumulated amortization	(45,775)	(24,210)	(35,362)	(21,031)			(6,397)	(2,929)			(748)	[1]	(250)	[1]			(3,268)	0
Net carrying amount	$ 180,343	$ 56,820	$ 138,362	$ 44,869			$ 33,733	$ 9,201			$ 4,916	[1]	$ 2,750	[1]			$ 3,332	$ 0
Estimated useful life					2 years	10 years			7 years	10 years					5 years	10 years			1 year	5 years

[1] Technology licenses relate to licensing agreements entered into by the Company. Amortization expense related to technology licenses is reported as “Product development and engineering” in the Unaudited Consolidated Condensed Statements of Income.