Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended								3 Months Ended
	Sep. 30, 2011 weeks years	Oct. 01, 2010 weeks	Oct. 02, 2009 years	Sep. 30, 2011 Accumulated Other Comprehensive Income (Loss) [Member]	Oct. 01, 2010 Accumulated Other Comprehensive Income (Loss) [Member]	Oct. 02, 2009 Accumulated Other Comprehensive Income (Loss) [Member]	Oct. 01, 2010 Accumulated Defined Benefit Plans Adjustment [Member]	Sep. 30, 2011 Accumulated Defined Benefit Plans Adjustment [Member]	Sep. 30, 2011 Building and Building Improvements [Member]	Sep. 30, 2011 Machinery and Equipment [Member]
Maturity Number of Days	90 days
Property, Plant and Equipment, Useful Life, Minimum									5	3
Property, Plant and Equipment, Useful Life, Maximum									30	10
Fiscal Period Number Of Weeks	52	52	52
Accumulated Other Comprehensive Loss Rollforward [Roll Forward]
Pension Adjustments, Beginning Balance							$ (468)	$ (419)
Auction Rate Securities Adjustment, Beginning Balance	(912)	(912)
Accumulated Other Comprehensive Loss, Beginning Balance	(1,297)	(1,380)
Penison adjustment							83
Pension adjustment	34	(83)	200	34	(83)	200
Pension adjustment	(34)	83	(200)	(34)	83	(200)
Pension Adjustments, Ending Balance							(385)	(419)
Auction Rate Securities Adjustment, Ending Balance	(912)	(912)	(912)
Accumulated Other Comprehensive Loss, Ending Balance	$ (1,331)	$ (1,297)	$ (1,380)