Product Warranties - Product Warranty (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 30, 2013	Mar. 24, 2012
Product Warranty Activity [Abstract]
Balance at Beginning of Period	$ 6,179	$ 4,448
Provisions	5,328	3,738
Settlements/Adjustments	(4,965)	(3,341)
Balance at End of Period	$ 6,542	$ 4,845