Postretirement Obligations (Details) (USD $)	3 Months Ended			12 Months Ended
	Sep. 25, 2011	Jun. 26, 2011	Mar. 27, 2011	Sep. 29, 2013	Sep. 30, 2012	Sep. 25, 2011	Sep. 26, 2010	Dec. 26, 2010
Defined Benefit Plan Disclosure [Line Items]
Net Actuarial Gains/Losses, Amortization Next Twelve Months				$ 1,819,000
Curtailment gains				0	0	16,137,000
Postretirement assets, net				14,956,000	7,551,000
Prior Service Cost, Amortization Next Twelve Months				1,459,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Curtailment gains	10,172,000	3,974,000	1,991,000
Defined Benefit Plan, Effect of Plan Amendment and Curtailment on Net Periodic Benefit Cost		82,000						769,000
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months				2,990,000
Prescription Drug Subsidy Receipts, Next Twelve Months				(250,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Next Twelve Months				2,740,000
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components				56,000
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year				7.50%	9.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate				4.00%	4.00%	5.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate				4.00%	4.00%
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax				21,899,000	16,570,000
Postretirement assets, net				14,956,000	7,551,000
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent				4,468,000	4,016,000
Defined Benefit Plan, Benefit Obligation	26,472,000			23,432,000	30,728,000	26,472,000
Defined Benefit Plan, Service Cost				728,000	728,000		927,000
Defined Benefit Plan, Interest Cost				1,125,000	1,109,000		1,600,000
Defined Benefit Plan, Expected Return on Plan Assets				(1,474,000)	(2,129,000)		(2,248,000)
Defined Benefit Plan, Amortization of Net Gains (Losses)				(1,324,000)	2,451,000		2,467,000
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)				(1,459,000)	(1,459,000)		(1,455,000)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments				0	0		(16,137,000)
Defined Benefit Plan, Net Periodic Benefit Cost				(2,404,000)	(4,202,000)		(19,780,000)
Defined Benefit Plan, Actuarial Gain (Loss)				(7,338,000)	5,269,000
Defined Benefit Plan, Benefits Paid				(2,102,000)	(2,965,000)
Defined Benefit Plan, Benefits Paid For Non-Participants				(706,000)	(2,852,000)
Prescription Drug Benefit, Effect of Subsidy on Net Periodic Postretirement Benefit Cost				291,000	115,000
Defined Benefit Plan, Fair Value of Plan Assets	38,529,000			33,920,000	34,263,000	38,529,000
Defined Benefit Plan, Actual Return on Plan Assets				1,495,000	2,127,000
Defined Benefit Plan, Contributions by Employer				679,000	(690,000)
Defined Benefit Plan, Benefits Paid Net Of Subsidy				(1,811,000)	(2,851,000)
Defined Benefit Plan, Funded Status of Plan				(10,488,000)	(3,535,000)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax				34,214,000	30,344,000
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax				12,315,000	13,774,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax				34,214,000	30,344,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Long-term Return on Assets				4.50%	4.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets				5.00%	6.00%	6.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate				5.00%	5.00%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate				2018	2020
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components				(52,000)
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation				894,000
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation				(811,000)
Defined Benefit Plan, Expected Future Benefit Payments, Year Two				2,480,000
Prescription Drug Subsidy Receipts, Year Two				(250,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 2				2,230,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Three				2,460,000
Prescription Drug Subsidy Receipts, Year Three				(240,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 3				2,220,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Four				2,410,000
Prescription Drug Subsidy Receipts, Year Four				(240,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 4				2,170,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Five				2,330,000
Prescription Drug Subsidy Receipts, Year Five				(230,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 5				2,100,000
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter				10,770,000
Prescription Drug Subsidy Receipts, after Year Five				(970,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, After Year 5				9,800,000
Defined Benefit Plan, Effect of Plan Amendment or Curtailment on the Accumulated Benefit Obligation		3,371,000	3,030,000					15,065,000
Defined Benefit Plan, Litigation Settlement				3,000,000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations				2000.00%
Defined Benefit Plan, Actual Plan Asset Allocations				22.00%	21.00%
Other Postretirement Benefit Plans, Defined Benefit [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations				8000.00%
Defined Benefit Plan, Actual Plan Asset Allocations				75.00%	75.00%
Other Postretirement Benefit Plans, Defined Benefit [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				0.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				25,276,000.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				0.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations				0.00%
Defined Benefit Plan, Actual Plan Asset Allocations				4.00%	2.00%
Other Postretirement Benefit Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				1,227,000.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				0.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				0.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Plan Assets- Receivables, net [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations				0.00%
Defined Benefit Plan, Actual Plan Asset Allocations				0.00%	2.00%
LTD Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded Status of Plan				2,785,000	3,143,000
Domestic Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				4,013,000.000
Domestic Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				1,858,000.000
Domestic Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				0.000
International Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				707,000.000
International Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				839,000.000
International Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets				$ 0.000