Product Warranties - Product Warranty (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 29, 2012	Dec. 24, 2011
Product Warranty Liability [Line Items]
Balance at Beginning of Period	$ 6,179	$ 4,448
Provisions	3,131	2,063
Settlements/ Adjustments	(2,739)	(1,624)
Balance at End of Period	$ 6,571	$ 4,887