Acquisitions and Divestitures Divestitures (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jan. 25, 2014	Oct. 29, 2016	Oct. 31, 2015	Nov. 01, 2014	Jan. 17, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Disposal Group, Gain (Loss) on Disposal		$ 0	$ 0	$ 4,884
Network Adapter Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Disposal Group, Description and Timing of Disposal	On January 17, 2014, the Company completed the sale of its network adapter business to QLogic Corporation (subsequently acquired by Cavium, Inc.) as part of the Company’s business strategy to focus on its portfolio of high-performance networking hardware and software-based products and services.
Disposal Group, Including Discontinued Operation, Assets					$ 5,100
Disposal Group, Including Discontinued Operation, Goodwill					$ 4,100
Disposal Group, Gain (Loss) on Disposal				$ 4,900