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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Restructuring Charges - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Jun. 28, 2013	Dec. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Jun. 28, 2013	Jun. 29, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,407	$ 194				$ 575
Restructuring reserve	2,649				2,649
Net restructuring charges	2,407		0		2,601	518
Revisions to original estimate				57
Estimated present value of remaining lease payments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,103
Reductions in carrying amounts of leasehold improvements
Restructuring Cost and Reserve [Line Items]
Restructuring charges	304
Existing lease related liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 546				$ 546