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Balance Sheet Details (Restructuring and Related Costs) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Restructuring Reserve [Roll Forward]
Restructuring charges, beginning balance	$ 634	$ 2,232
Provisions		898
Payments and other	(634)	(1,067)
Restructuring charges, ending balance	0	2,063
Severance Related [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges, beginning balance	0	912
Provisions		218
Payments and other	0	(562)
Restructuring charges, ending balance	0	568
Facilities-related Charges [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges, beginning balance	0	17
Provisions		0
Payments and other	0	(17)
Restructuring charges, ending balance	0	0
Other Restructuring Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges, beginning balance	634	1,303
Provisions		680
Payments and other	(634)	(488)
Restructuring charges, ending balance	$ 0	$ 1,495

Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Net total Increase or Decrease in the accrual for restructuring costs during the reporting period.

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