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Pension, Postretirement, and Postemployement Obligations (Details) - USD ($)
 12 Months Ended
Sep. 27, 2015
Sep. 28, 2014
Sep. 29, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Projected Benefit Obligation $ 7,109,000    
Pension Plans, Defined Benefit [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Service Cost 232,000 $ 156,000 $ 216,000
Defined Benefit Plan, Interest Cost 8,122,000 7,996,000 7,529,000
Defined Benefit Plan, Expected Return on Plan Assets (9,863,000) (9,932,000) (9,838,000)
Defined Benefit Plan, Amortization of Net Gains (Losses) (1,682,000) 423,000 2,287,000
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) 136,000 136,000 136,000
Defined Benefit Plan, Net Periodic Benefit Cost 37,000 (1,493,000) 58,000
Other Postretirement Benefit Plans, Defined Benefit [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Service Cost 76,000 596,000 1,000
Defined Benefit Plan, Interest Cost 922,000 911,000 1,000
Defined Benefit Plan, Expected Return on Plan Assets (1,445,000) (1,483,000) (1,000)
Defined Benefit Plan, Amortization of Net Gains (Losses) 1,386,000 (1,819,000) (1,000)
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) 1,459,000 1,459,000 1,000
Defined Benefit Plan, Net Periodic Benefit Cost $ (3,292,000) $ (3,254,000) $ (2,000)