Goodwill and Intangible Assets (Schedule Of Indefinite-Lived Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 28, 2012	Jan. 29, 2012
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross carrying amount	$ 34,870	$ 12,370
Accumulated impairment loss	(3,170)	(2,470)
Net carrying amount	31,700	9,900
In-Process Research And Development [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross carrying amount	34,870	12,370
Accumulated impairment loss	(3,170)	(2,470)
Net carrying amount	$ 31,700	$ 9,900