Guarantees (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 29, 2012	Oct. 01, 2011
Limited warranty liability, beginning balance	$ 5,453	$ 4,055
Accruals for warranties issued during the period	649	1,714
Settlements (in cash or in kind) during the period	(957)	(316)
Limited warranty liability, ending balance	$ 5,145	$ 5,453
Minimum [Member]
Product warranty specification period, months	12
Maximum [Member]
Product warranty specification period, months	24