Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Dec. 28, 2019
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense, Net	$ 25,510	$ 26,594
Operating Leases, Future Minimum Payments Due, Next Twelve Months	20,993
Operating Leases, Future Minimum Payments, Due in Two Years	19,118
Operating Leases, Future Minimum Payments, Due in Three Years	15,636
Operating Leases, Future Minimum Payments, Due in Four Years	11,344
Operating Leases, Future Minimum Payments, Due in Five Years	7,151
Operating Leases, Future Minimum Payments, Due Thereafter	$ 41,670
Standby letters of credit			$ 35,728