Summary of Long-term Debt Outstanding (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified			12 Months Ended
Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013 Unsecured term loan, 6.70% due in one installment of $6.25 payable in fiscal year 2014 Installment	Sep. 27, 2013 Secured Debt
Debt Instrument [Line Items]
Debt instrument stated interest rate			6.70%	1.31%
Current maturities of long-term debt	$ 56,250	$ 0	$ 6,250
Debt Instrument Maturity Dates			2014	2018
Unsecured term loan, number of installment payments			1

Carrying amount of long-term debt, net of unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19,20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Article 5

Name:	us-gaap_LongTermDebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant