Quarterly Financial Data - Unaudited - Schedule of Quarterly Financial Data - Unaudited (Parenthetical) (Detail) (USD $)	3 Months Ended	12 Months Ended
Sep. 28, 2013	Sep. 28, 2013	Sep. 29, 2012	Sep. 24, 2011
Quarterly Financial Information Disclosure [Abstract]
Goodwill impairment	$ 7,709,000	$ 7,709,000	$ 0	$ 0
Charge related to new products	$ 11,200,000	$ 11,200,000

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration