Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Oct. 01, 2010
Accounting Policies [Line Items]
Fiscal Period Number Of Weeks In Fiscal Year	P52W	P52W	P52W
Maturity Number of Days	90 days
Accumulated Other Comprehensive Loss Rollforward [Roll Forward]
Auction Rate Securities Adjustment, Beginning Balance	$ (912)	$ (912)
Period adjustments	(6)	0
Auction Rate Securities Adjustment, Ending Balance	(918)	(912)	(912)
Accumulated Other Comprehensive Loss, Beginning Balance	(1,331)	(1,297)
Period adjustment	(262)	(34)	83
Accumulated Other Comprehensive Loss, Ending Balance	(1,593)	(1,331)	(1,297)
Building and Building Improvements [Member]
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life, Minimum	5
Property, Plant and Equipment, Useful Life, Maximum	30
Machinery and Equipment [Member]
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life, Minimum	3
Property, Plant and Equipment, Useful Life, Maximum	10
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Loss Rollforward [Roll Forward]
Period adjustment	256
Period adjustment	(262)	(34)	83
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Loss Rollforward [Roll Forward]
Pension Adjustments, Beginning Balance		(385)
Period adjustment		34
Pension Adjustments, Ending Balance	$ (675)	$ (419)