Guarantees (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013
Limited warranty liability, beginning balance	$ 5,942	$ 5,145
Accruals for warranties issued during the period	4,331	1,168
Settlements (in cash or in kind) during the period	(3,470)	(371)
Limited warranty liability, ending balance	$ 6,803	$ 5,942
Minimum [Member]
Product warranty specification period, months	12
Maximum [Member]
Product warranty specification period, months	24