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Pension, Postretirement, and Postemployement Obligations (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 30, 2018
Dec. 24, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined Benefit Plan, Plan Assets, Contributions by Employer 650  
Pension Plans, Defined Benefit [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined Benefit Plan, Service Cost $ 9 $ 12
Defined Benefit Plan, Interest Cost 1,641 1,438
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (2,018) (1,983)
Defined Benefit Plan, Amortization of Gain (Loss) 284 506
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (25) (34)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) (109) (61)
Other Postretirement Benefit Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined Benefit Plan, Service Cost 0 0
Defined Benefit Plan, Interest Cost 103 90
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (270) (270)
Defined Benefit Plan, Amortization of Gain (Loss) (244) (246)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (181) (196)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) $ (592) $ (622)