Summary of Significant Accounting Policies - Accounts Receivable Reserve Activity (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 24, 2011
Accounting Policies [Abstract]
Balance at Beginning of Period	$ 6,396	$ 6,516	$ 7,769
Charged to Costs and Expenses	4,296	3,270	1,614
Write- offs and Payments	(1,894)	(3,390)	(2,867)
Balance at End of Period	$ 8,798	$ 6,396	$ 6,516