Goodwill and Intangible Assets (Future Amortization Expense For Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 28, 2012		Jan. 29, 2012
Remainder of fiscal year 2013	$ 8,418
Fiscal year 2014	29,655
Fiscal year 2015	28,981
Fiscal year 2016	28,399
Fiscal year 2017	28,062
Thereafter	56,828
Total expected amortization expense	180,343		56,820
Technology Licenses [Member]
Remainder of fiscal year 2013	250
Fiscal year 2014	1,000
Fiscal year 2015	972
Fiscal year 2016	936
Fiscal year 2017	686
Thereafter	1,072
Total expected amortization expense	4,916	[1]	2,750	[1]
Sierra Monolithics [Member]
Remainder of fiscal year 2013	2,218
Fiscal year 2014	8,870
Fiscal year 2015	8,870
Fiscal year 2016	8,870
Fiscal year 2017	8,870
Thereafter	16,650
Total expected amortization expense	54,348
Gennum [Member]
Remainder of fiscal year 2013	5,698
Fiscal year 2014	18,778
Fiscal year 2015	18,132
Fiscal year 2016	17,586
Fiscal year 2017	17,499
Thereafter	38,017
Total expected amortization expense	115,710
Cycleo [Member]
Remainder of fiscal year 2013	252
Fiscal year 2014	1,007
Fiscal year 2015	1,007
Fiscal year 2016	1,007
Fiscal year 2017	1,007
Thereafter	1,089
Total expected amortization expense	$ 5,369

[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.