Employee Benefit Plans (Schedule Of Cost Of The Postretirement Benefit Plan) (Details) - Postretirement Benefit Plan - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 68	$ 84	$ 118
Interest cost	315	281	288
Amortization of prior service credit	(471)	(470)	0
Amortization of actuarial gain	(713)	(511)	(488)
Net periodic postretirement benefit cost (income)	$ (801)	$ (616)	$ (82)