Business Segments and Geographic Information - Additional Information (Detail) (USD $)	3 Months Ended
	Dec. 29, 2012 Customer Segment	Dec. 24, 2011 Customer	Sep. 29, 2012 Customer
Segment Reporting Disclosure [Line Items]
Number of reportable segments	4
Intersegment revenues	$ 0	$ 0
Customers with balances greater than 10% of accounts receivable	0		0
Customer represented greater than 10% of product revenues	0	0
Total revenue attributed to foreign countries	$ 175,400,000	$ 117,500,000
More than 10% country wise revenue, description	Other than the United States, no single country accounted for more than 10% of consolidated revenues.