Acquisitions (Details) (USD $)	3 Months Ended
	Feb. 04, 2012	Jul. 30, 2011	Jun. 09, 2011
Acquisitions (Textual) [Abstract]
Fair value of the consideration transferred totaled			$ 27,800,000
Initial cash payments			14,000,000
Contingent consideration	12,244,000		13,800,000
Goodwill	18,900,000
Current portion of contingent consideration liablility	7,700,000
Noncurrent portion of contingent consideration liablility	4,500,000
Payments for contingent consideration	2,000,000
In-process research and development	12,200,000
Deferred tax liabilities	3,300,000
Goodwill deductible for tax purposes	0
Obligated to pay royalties on revenue recognized from the sale of Lyric products and licenses	25,000,000
Obligation payment period	20 years
Royalty payments	0
Acquisition related costs		$ 200,000
Period of cash payments related to contingent consideration	Payable during the period from June 2011 through June 2016