Commitments and Contingencies Operating Lease (Details) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 25, 2011	Sep. 26, 2010
Long-term Purchase Commitment [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 4,000,000
Operating Leases, Future Minimum Payments, Due in Two Years	1,897,000
Operating Leases, Future Minimum Payments, Due in Three Years	1,647,000
Operating Leases, Future Minimum Payments, Due in Four Years	1,557,000
Operating Leases, Future Minimum Payments, Due in Five Years	1,246,000
Operating Leases, Future Minimum Payments, Due Thereafter	4,000,000
Operating Leases, Rent Expense	4,135,000	4,527,000	4,549,000
Contractual Obligation	$ 900,000