Postretirement Obligations (Details) (USD $) | 3 Months Ended | 12 Months Ended |
Sep. 30, 2012 | Jun. 26, 2011 | Mar. 27, 2011 | Dec. 26, 2010 | Mar. 28, 2010 | Dec. 27, 2009 | Sep. 29, 2013 | Sep. 30, 2012 | Sep. 25, 2011 | Sep. 26, 2010 |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Curtailment gains | | $3,974,000 | $1,991,000 | $10,172,000 | | | | $0 | $16,137,000 | $45,012,000 |
Postretirement assets, net | 7,551,000 | | | | | | | 7,551,000 | 14,934,000 | |
Other Postretirement Benefit Plans, Defined Benefit [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Curtailment gains | | 3,974,000 | 1,991,000 | 10,172,000 | 11,878,000 | 31,130,000 | | | | |
Defined Benefit Plan, Effect of Plan Amendment and Curtailment on Net Periodic Benefit Cost | | 82,000 | | 769,000 | | 1,460,000 | | | | |
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months | 3,280,000 | | | | | | | 3,280,000 | | |
Prescription Drug Subsidy Receipts, Next Twelve Months | -220,000 | | | | | | | -220,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Next Twelve Months | 3,060,000 | | | | | | | 3,060,000 | | |
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components | | | | | | | | 53,000 | | |
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year | | | | | | | | 9.00% | 9.00% | |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate | | | | | | | 4.00% | | 5.00% | 6.00% |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 4.00% | | | | | | | 4.00% | 4.00% | |
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax | | | | | | | | 16,570,000 | 27,000 | |
Postretirement assets, net | 7,551,000 | | | | | | | 7,551,000 | 15,000 | |
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent | 4,016,000 | | | | | | | 4,016,000 | 3,000 | |
Defined Benefit Plan, Benefit Obligation | 30,728,000 | | | | | | | 30,728,000 | 26,472,000 | 50,482,000 |
Defined Benefit Plan, Service Cost | 728,000 | | | | | | | -728,000 | -927,000 | -361,000 |
Defined Benefit Plan, Interest Cost | -1,109,000 | | | | | | | 1,109,000 | -1,600,000 | -2,971,000 |
Defined Benefit Plan, Expected Return on Plan Assets | | | | | | | | -2,129,000 | -2,248,000 | -2,274,000 |
Defined Benefit Plan, Amortization of Net Gains (Losses) | | | | | | | | -2,451,000 | 2,467,000 | 2,447,000 |
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) | | | | | | | | -1,459,000 | -1,455,000 | -1,994,000 |
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments | | | | | | | | 0 | -16,137,000 | -43,008,000 |
Defined Benefit Plan, Net Periodic Benefit Cost | | | | | | | | -4,202,000 | -19,780,000 | -46,391,000 |
Defined Benefit Plan, Actuarial Gain (Loss) | | | | | | | | 5,269,000 | -2,311,000 | |
Defined Benefit Plan, Benefits Paid | | | | | | | | -2,965,000 | -2,922,000 | |
Defined Benefit Plan, Benefits Paid For Non-Participants | | | | | | | | -2,852,000 | -1,524,000 | |
Defined Benefit Plan, Plan Amendments | | | | | | | | 0 | -5,931,000 | |
Defined Benefit Plan, Curtailments | | | | | | | | 0 | -15,535,000 | |
Prescription Drug Benefit, Effect of Subsidy on Net Periodic Postretirement Benefit Cost | | | | | | | | 115,000 | 162,000 | |
Defined Benefit Plan, Fair Value of Plan Assets | 34,263,000 | | | | | | | 34,263,000 | 38,529,000 | 41,447,000 |
Defined Benefit Plan, Actual Return on Plan Assets | | | | | | | | 2,127,000 | 19,000 | |
Defined Benefit Plan, Contributions by Employer | | | | | | | | -690,000 | 1,347,000 | |
Defined Benefit Plan, Benefits Paid Net Of Subsidy | | | | | | | | -2,851,000 | -2,760,000 | |
Defined Benefit Plan, Funded Status of Plan | -3,535,000 | | | | | | | -3,535,000 | -12,057,000 | |
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax | 30,344,000 | | | | | | | 30,344,000 | 42,000 | |
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax | | | | | | | | 13,774,000 | 15,000 | |
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax | | | | | | | | 30,344,000 | 42,000 | |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Long-term Return on Assets | 4.50% | | | | | | | 4.50% | 5.75% | |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets | | | | | | | 6.00% | | 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 | 2020 | | | | | | | 2020 | 2019 | |
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components | | | | | | | | -48,000 | | |
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation | | | | | | | | 1,452,000 | | |
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation | | | | | | | | -1,306,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments, Year Two | 3,080,000 | | | | | | | 3,080,000 | | |
Prescription Drug Subsidy Receipts, Year Two | -230,000 | | | | | | | -230,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 2 | 2,850,000 | | | | | | | 2,850,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments, Year Three | 2,980,000 | | | | | | | 2,980,000 | | |
Prescription Drug Subsidy Receipts, Year Three | -230,000 | | | | | | | -230,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 3 | 2,750,000 | | | | | | | 2,750,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments, Year Four | 2,960,000 | | | | | | | 2,960,000 | | |
Prescription Drug Subsidy Receipts, Year Four | -230,000 | | | | | | | -230,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 4 | 2,730,000 | | | | | | | 2,730,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments, Year Five | 2,900,000 | | | | | | | 2,900,000 | | |
Prescription Drug Subsidy Receipts, Year Five | -230,000 | | | | | | | -230,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, Year 5 | 2,670,000 | | | | | | | 2,670,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter | 13,280,000 | | | | | | | 13,280,000 | | |
Prescription Drug Subsidy Receipts, after Year Five | -1,100,000 | | | | | | | -1,100,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments Net of Subsidy, After Year 5 | 12,180,000 | | | | | | | 12,180,000 | | |
Defined Benefit Plan, Effect of Plan Amendment or Curtailment on the Accumulated Benefit Obligation | | 3,371,000 | 3,030,000 | 15,065,000 | 6,576,000 | 28,750,000 | | | | |
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, Actual Plan Asset Allocations | 21.00% | | | | | | | 21.00% | 8.00% | |
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum | | | | | | | | 10.00% | | |
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum | | | | | | | | 30.00% | | |
Other Postretirement Benefit Plans, Defined Benefit [Member] | Fixed Income Securities [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Actual Plan Asset Allocations | 75.00% | | | | | | | 75.00% | 85.00% | |
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum | | | | | | | | 70.00% | | |
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum | | | | | | | | 90.00% | | |
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 | | | | | | | 0 | | |
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 | 25,642,660 | | | | | | | 25,642,660 | | |
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 | | | | | | | 0 | | |
Other Postretirement Benefit Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Actual Plan Asset Allocations | 2.00% | | | | | | | 2.00% | 7.00% | |
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 | 691,905 | | | | | | | 691,905 | | |
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 | | | | | | | 0 | | |
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 | | | | | | | 0 | | |
Other Postretirement Benefit Plans, Defined Benefit [Member] | Plan Assets- Receivables, net [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Actual Plan Asset Allocations | 2.00% | | | | | | | 2.00% | 0.00% | |
Other Postretirement Benefit Plans, Defined Benefit [Member] | Plan Assets- Receivables, net [Member] | Fair Value, Inputs, Level 1 [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Fair Value of Plan Assets | 802,801 | | | | | | | 802,801 | | |
Other Postretirement Benefit Plans, Defined Benefit [Member] | Plan Assets- Receivables, net [Member] | Fair Value, Inputs, Level 2 [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | | | | | | | 0 | | |
Other Postretirement Benefit Plans, Defined Benefit [Member] | Plan Assets- Receivables, net [Member] | Fair Value, Inputs, Level 3 [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | | | | | | | 0 | | |
Pension Plans, Defined Benefit [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Curtailment gains | | | | | 2,004,000 | | | | | |
Defined Benefit Plan, Effect of Plan Amendment and Curtailment on Net Periodic Benefit Cost | | 188,000 | | | 668,000 | | | | | |
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months | 11,000 | | | | | | | 11,000 | | |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate | | | | | | | | 4.00% | 5.00% | 6.00% |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 4.00% | | | | | | | 4.00% | 4.00% | |
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax | | | | | | | 2,287,000 | -51,871,000 | -51,459,000 | |
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent | 66,319,000 | | | | | | | 66,319,000 | 71,230,000 | |
Defined Benefit Plan, Benefit Obligation | 201,219,000 | | | | | | | 201,219,000 | 186,826,000 | 178,179,000 |
Defined Benefit Plan, Service Cost | 30,000 | | | | | | | -30,000 | -169,000 | -792,000 |
Defined Benefit Plan, Interest Cost | -7,975,000 | | | | | | | 7,975,000 | -8,354,000 | -8,888,000 |
Defined Benefit Plan, Expected Return on Plan Assets | | | | | | | | -8,891,000 | -9,733,000 | -9,568,000 |
Defined Benefit Plan, Amortization of Net Gains (Losses) | -201,219,000 | | | | | | | 2,370,000 | -812,000 | -453,000 |
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) | | | | | | | | -136,000 | -137,000 | -136,000 |
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments | | | | | | | | 0 | 0 | -2,004,000 |
Defined Benefit Plan, Net Periodic Benefit Cost | | | | | | | | 1,348,000 | -535,000 | -1,575,000 |
Defined Benefit Plan, Actuarial Gain (Loss) | | | | | | | | 17,268,000 | 12,299,000 | |
Defined Benefit Plan, Benefits Paid | | | | | | | | -10,880,000 | -11,584,000 | |
Defined Benefit Plan, Curtailments | | | | | | | | 0 | -591,000 | |
Defined Benefit Plan, Fair Value of Plan Assets | 134,900,000 | | | | | | | 134,900,000 | 115,596,000 | 125,464,000 |
Defined Benefit Plan, Actual Return on Plan Assets | | | | | | | | 24,849,000 | 1,007,000 | |
Defined Benefit Plan, Contributions by Employer | | | | | | | 2,733,000 | 6,807,000 | 2,137,000 | |
Defined Benefit Plan, Funded Status of Plan | 66,319,000 | | | | | | | 66,319,000 | 71,230,000 | |
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax | -50,945,000 | | | | | | | -50,945,000 | -50,396,000 | |
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax | | | | | | | -137,000 | 926,000 | 1,063,000 | |
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax | | | | | | | | -50,945,000 | -50,396,000 | |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets | | | | | | | 0.00% | 8.00% | 8.00% | 8.00% |
Defined Benefit Plan, Expected Future Benefit Payments, Year Two | 11,000 | | | | | | | 11,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments, Year Three | 11,000 | | | | | | | 11,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments, Year Four | 11,000 | | | | | | | 11,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments, Year Five | 11,000 | | | | | | | 11,000 | | |
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter | 58,000 | | | | | | | 58,000 | | |
Defined Benefit Plan, Effect of Plan Amendment or Curtailment on the Accumulated Benefit Obligation | | 592,000 | | | 2,004,000 | | | | | |
Pension Plans, Defined Benefit [Member] | Equity Securities [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Actual Plan Asset Allocations | 63.00% | | | | | | | 63.00% | 66.00% | |
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum | | | | | | | | 50.00% | | |
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum | | | | | | | | 75.00% | | |
Pension Plans, Defined Benefit [Member] | Fixed Income Securities [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Actual Plan Asset Allocations | 29.00% | | | | | | | 29.00% | 33.00% | |
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum | | | | | | | | 25.00% | | |
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum | | | | | | | | 35.00% | | |
Pension 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 | 32,169,494 | | | | | | | 32,169,494 | | |
Pension 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 | 7,759,444 | | | | | | | 7,759,444 | | |
Pension 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 | | | | | | | 0 | | |
Pension Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Actual Plan Asset Allocations | 2.00% | | | | | | | 2.00% | 1.00% | |
Pension 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 | 2,028,505 | | | | | | | 2,028,505 | | |
Pension 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 | | | | | | | 0 | | |
Pension 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 | | | | | | | 0 | | |
Pension Plans, Defined Benefit [Member] | Plan Assets- Receivables, net [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Actual Plan Asset Allocations | 6.00% | | | | | | | 6.00% | 0.00% | |
Pension Plans, Defined Benefit [Member] | Plan Assets- Receivables, net [Member] | Fair Value, Inputs, Level 1 [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Fair Value of Plan Assets | 8,117,459 | | | | | | | 8,117,459 | | |
Pension Plans, Defined Benefit [Member] | Plan Assets- Receivables, net [Member] | Fair Value, Inputs, Level 2 [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | | | | | | | 0 | | |
Pension Plans, Defined Benefit [Member] | Plan Assets- Receivables, net [Member] | Fair Value, Inputs, Level 3 [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | | | | | | | 0 | | |
LTD Plan [Member] | | | | | | | | | | |
Defined Benefit Plan Disclosure [Line Items] | | | | | | | | | | |
Defined Benefit Plan, Funded Status of Plan | 3,143,000 | | | | | | | 3,143,000 | 3,227,000 | |
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 | 4,384,746 | | | | | | | 4,384,746 | | |
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 | 2,068,890 | | | | | | | 2,068,890 | | |
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 | | | | | | | 0 | | |
Domestic Equity Securities [Member] | Pension 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 | 27,499,395 | | | | | | | 27,499,395 | | |
Domestic Equity Securities [Member] | Pension 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 | 47,713,917 | | | | | | | 47,713,917 | | |
Domestic Equity Securities [Member] | Pension 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 | | | | | | | 0 | | |
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 | 0 | | | | | | | 0 | | |
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 | 671,069 | | | | | | | 671,069 | | |
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 | | | | | | | 0 | | |
International Equity Securities [Member] | Pension 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 | 0 | | | | | | | 0 | | |
International Equity Securities [Member] | Pension 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 | 9,612,986 | | | | | | | 9,612,986 | | |
International Equity Securities [Member] | Pension 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 | | | | | | | $0 | | |