Pension, Postretirement, and Postemployement Obligations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 25, 2017	Jun. 26, 2016	Jun. 25, 2017	Jun. 26, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Contributions			$ 0	$ 2,314
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Service Cost	$ 21	$ 49	63	147
Defined Benefit Plan, Interest Cost	1,349	1,515	4,047	4,545
Defined Benefit Plan, Expected Return on Plan Assets	(1,969)	(2,174)	(5,907)	(6,522)
Defined Benefit Plan, Amortization of Net Gains (Losses)	736	599	2,208	1,797
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	34	34	102	102
Defined Benefit Plan, Net Periodic Benefit Cost	103	(45)	309	(135)
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	0	16	12	48
Defined Benefit Plan, Interest Cost	91	156	323	468
Defined Benefit Plan, Expected Return on Plan Assets	(264)	(331)	(792)	(993)
Defined Benefit Plan, Amortization of Net Gains (Losses)	(254)	(273)	(734)	(819)
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	365	365	1,095	1,095
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0	0	(3,741)	0
Defined Benefit Plan, Net Periodic Benefit Cost	$ (792)	$ (797)	$ (6,027)	$ (2,391)