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Pension, Postretirement, and Postemployement Obligations (Details) - USD ($)
 3 Months Ended 9 Months Ended
Jun. 28, 2015
Jun. 29, 2014
Jun. 28, 2015
Jun. 29, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year     $ 2,818,000  
Pension Plans, Defined Benefit [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Defined Benefit Plan, Service Cost $ 226,000 $ 39,000 678,000 $ 117,000
Defined Benefit Plan, Interest Cost 1,859,000 1,999,000 5,577,000 5,997,000
Defined Benefit Plan, Expected Return on Plan Assets 2,466,000 2,483,000 (7,398,000) (7,449,000)
Defined Benefit Plan, Amortization of Net Gains (Losses) 420,000 106,000 1,260,000 318,000
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) 34,000 34,000 (102,000) (102,000)
Defined Benefit Plan, Net Periodic Benefit Cost 5,000 (373,000) 15,000 (1,119,000)
Other Postretirement Benefit Plans, Defined Benefit [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year     0  
Defined Benefit Plan, Service Cost 39,000 149,000 117,000 447,000
Defined Benefit Plan, Interest Cost 211,000 228,000 633,000 684,000
Defined Benefit Plan, Expected Return on Plan Assets (361,000) (371,000) (1,083,000) (1,113,000)
Defined Benefit Plan, Amortization of Net Gains (Losses) (347,000) (455,000) (1,041,000) (1,365,000)
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) (365,000) (365,000) (1,095,000) (1,095,000)
Defined Benefit Plan, Net Periodic Benefit Cost $ (823,000) $ (814,000) $ (2,469,000) $ (2,442,000)