Fair Value (Details 2) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended		9 Months Ended	12 Months Ended
	May 05, 2012		Aug. 04, 2012	Oct. 29, 2011
Business acquisition contingent consideration at fair value
Contingent consideration, Ending balance			$ 12,316	$ 13,973
Level 3 [Member]
Business acquisition contingent consideration at fair value
Contingent consideration, Beginning balance	13,973		13,973	0
Contingent consideration liability recorded				13,790
Payment made	(2,000)	[1]
Fair value adjustment			343	183	[2]
Contingent consideration, Ending balance			$ 12,316	$ 13,973

[1] The payment is reflected in the statements of cash flows as cash used in financing activities related to the liability recognized at fair value as of the acquisition date and as cash provided by operating activities related to the fair value adjustments previously recognized in earnings.

[2] Recorded in research and development expense in the condensed consolidated statements of income.