Special Charges (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended	12 Months Ended			36 Months Ended	3 Months Ended	6 Months Ended
	May 04, 2013	May 05, 2012	May 04, 2013	May 05, 2012	May 04, 2013 Reduction of Operating Costs [Member]	Feb. 02, 2013 Reduction of Operating Costs [Member]	May 04, 2013 Reduction of Operating Costs [Member]	Nov. 03, 2012 Reduction of Operating Costs [Member]	Oct. 29, 2011 Reduction of Operating Costs [Member]	Oct. 30, 2010 Reduction of Operating Costs [Member]	Nov. 03, 2012 Reduction of Operating Costs 2008-2010 [Member] Person	Feb. 02, 2013 Reduction of Operating Costs 2011 [Member]	May 04, 2013 Reduction of Operating Costs 2011 [Member] Person
Summary of the Company's special charges, Income Statement
Workforce reductions							$ 14,071,000	$ 7,966,000	$ 2,239,000	$ 10,908,000
Facility closure costs							0	186,000	0	0
Non-cash impairment charge							0	219,000	0	487,000
Other items							0	60,000	0	24,000
Total Charges	0	0	14,071,000	2,595,000		14,071,000	14,071,000	8,431,000	2,239,000	11,419,000	22,100,000	14,100,000
Summary of the Company's special charges and accruals related to ongoing actions, Balance Sheet
Accrued Restructuring, Beginning Balance					12,824,000	2,993,000	2,993,000
Total Charges	0	0	14,071,000	2,595,000		14,071,000	14,071,000	8,431,000	2,239,000	11,419,000	22,100,000	14,100,000
Severance payments					(4,311,000)	(4,276,000)
Effect of foreign currency on accrual					19,000	(36,000)
Accrued Restructuring, Ending Balance					8,494,000	12,824,000	8,494,000	2,993,000
Special Charges (Textual) [Abstract]
Charge related to lease obligation costs for facilities ceased using by Company											200,000
Write-off of property, plant and equipment no longer used											200,000
Contract termination costs											100,000
Total Charges	0	0	14,071,000	2,595,000		14,071,000	14,071,000	8,431,000	2,239,000	11,419,000	22,100,000	14,100,000
Charge related to the severance and fringe benefit costs											21,100,000
Number Of Manufacturing Engineering And Selling Marketing General And Administrative Employees Related to Action											269		137
Number Of Employees Still Employed Who Are Planned To Be Separated													6
Impairment of intellectual property, related to the Company's decision to abandon efforts to develop a particular expertise in power management											$ 500,000