Postretirement Obligations (Details) (USD $)	12 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Net Actuarial Gains/Losses, Amortization Next Twelve Months	$ 1,443,000
Postretirement assets, net	14,136,000	14,956,000
Prior Service Cost, Amortization Next Twelve Months	1,459,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	3,070,000
Prescription Drug Subsidy Receipts, Next Twelve Months	(220,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Next Twelve Months	2,850,000
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components	36,000
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year	7.50%	7.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.00%	4.00%	4.00%
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	16,394,000	21,899,000
Postretirement assets, net	14,136,000	14,956,000
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	6,761,000	4,468,000
Defined Benefit Plan, Benefit Obligation	25,506,000	23,432,000	30,728,000
Defined Benefit Plan, Service Cost	596,000	728,000	728,000
Defined Benefit Plan, Interest Cost	911,000	1,125,000	1,109,000
Defined Benefit Plan, Expected Return on Plan Assets	(1,483,000)	(1,474,000)	(2,129,000)
Defined Benefit Plan, Amortization of Net Gains (Losses)	(1,819,000)	1,324,000	2,451,000
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	(1,459,000)	(1,459,000)	(1,459,000)
Defined Benefit Plan, Net Periodic Benefit Cost	(3,254,000)	(2,404,000)	(4,202,000)
Defined Benefit Plan, Actuarial Gain (Loss)	2,298,000	(7,338,000)
Defined Benefit Plan, Benefits Paid	(1,905,000)	(2,102,000)
Defined Benefit Plan, Benefits Paid For Non-Participants	(1,072,000)	(706,000)
Prescription Drug Benefit, Effect of Subsidy on Net Periodic Postretirement Benefit Cost	174,000	291,000
Defined Benefit Plan, Fair Value of Plan Assets	32,881,000	33,920,000	34,263,000
Defined Benefit Plan, Actual Return on Plan Assets	1,167,000	1,495,000
Defined Benefit Plan, Contributions by Employer	597,000	679,000
Defined Benefit Plan, Benefits Paid Net Of Subsidy	(1,731,000)	(1,811,000)
Defined Benefit Plan, Funded Status of Plan	(7,375,000)	(10,488,000)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax	27,250,000	34,214,000
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax	10,856,000	12,315,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	27,250,000	34,214,000
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%	5.00%	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	2018
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components	(32,000)
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation	742,000
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	(673,000)
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	2,130,000
Prescription Drug Subsidy Receipts, Year Two	(220,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 2	1,910,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	2,090,000
Prescription Drug Subsidy Receipts, Year Three	(210,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 3	1,880,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	2,010,000
Prescription Drug Subsidy Receipts, Year Four	(200,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 4	1,810,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	2,000,000
Prescription Drug Subsidy Receipts, Year Five	(210,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 5	1,790,000
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	9,010,000
Prescription Drug Subsidy Receipts, after Year Five	(860,000)
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, After Year 5	8,150,000
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%	22.00%
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	74.00%	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	24,200,084.000
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%	4.00%
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	1,294,408.000
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
LTD Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded Status of Plan	3,597,000	2,785,000
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	4,111,852.000
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	1,676,480.000
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	719,162.000
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	879,405.000
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