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Employee Benefit Plans (Schedule Of Changes In The Accumulated Benefit Obligation Of Unfunded Plan) (Details) - Postretirement Benefit Plan - USD ($)
$ in Thousands
12 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 30, 2017
Change in Accumulated Postretirement Benefit Obligation (APBO):      
Projected benefit obligation at prior year measurement date $ 8,857 $ 10,513  
Service cost 68 84 $ 118
Interest cost 315 281 288
Contributions by plan participants 644 629  
Benefits paid (1,134) (1,402)  
Actuarial (gains) losses 60 (1,248)  
Projected benefit obligation at measurement date 8,810 8,857 $ 10,513
Funded status (8,810) (8,857)  
Accrued postretirement benefit liability 8,810 8,857  
Prior service credit 259 729  
Actuarial gains 4,142 4,915  
Amount recognized in AOCIL, before taxes $ 4,401 $ 5,644