Pension, Postretirement, and Postemployement Obligations (Details) (USD $)	3 Months Ended				9 Months Ended
	Jun. 24, 2012	Jun. 26, 2011	Mar. 27, 2011	Dec. 26, 2010	Jun. 24, 2012	Jun. 26, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Curtailment gains	$ 0	$ 3,974,000			$ 0	$ 16,137,000
Pension 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	3,458,000				3,458,000
Defined Benefit Plan, Effect of Plan Amendment and Curtailment on Net Periodic Benefit Cost		188,000				188,000
Defined Benefit Plan, Effect of Plan Amendment or Curtailment on the Accumulated Benefit Obligation		592,000				592,000
Defined Benefit Plan, Service Cost	7,000	42,000			21,000	163,000
Defined Benefit Plan, Interest Cost	1,994,000	2,088,000			5,982,000	6,229,000
Defined Benefit Plan, Expected Return on Plan Assets	(2,223,000)	(2,433,000)			(6,669,000)	(7,226,000)
Defined Benefit Plan, Amortization of Net Gains (Losses)	593,000	203,000			1,779,000	629,000
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	(34,000)	(34,000)			(102,000)	(103,000)
Defined Benefit Plan, Net Periodic Benefit Cost	337,000	(134,000)			1,011,000	(308,000)
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				0
Curtailment gains		3,974,000	1,991,000	10,172,000
Defined Benefit Plan, Effect of Plan Amendment and Curtailment on Net Periodic Benefit Cost		82,000		769,000		82,000
Defined Benefit Plan, Effect of Plan Amendment or Curtailment on the Accumulated Benefit Obligation		3,371,000	3,030,000	15,065,000		3,371,000
Defined Benefit Plan, Service Cost	182,000	232,000			546,000	715,000
Defined Benefit Plan, Interest Cost	277,000	350,000			831,000	1,278,000
Defined Benefit Plan, Expected Return on Plan Assets	(532,000)	(563,000)			(1,596,000)	(1,675,000)
Defined Benefit Plan, Amortization of Net Gains (Losses)	(613,000)	(598,000)			(1,839,000)	(1,872,000)
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	(365,000)	(380,000)			(1,095,000)	(1,091,000)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0	(3,974,000)			0	(16,137,000)
Defined Benefit Plan, Net Periodic Benefit Cost	$ (1,051,000)	$ (4,933,000)			$ (3,153,000)	$ (18,782,000)