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Accumulated Other Comprehensive Loss (Amounts reclassified from accumulated other comprehensive loss) (Details) (USD $) | 12 Months Ended
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Nov. 30, 2014 | Nov. 30, 2013 | Nov. 30, 2012
Equity [Abstract] |  |  |  |  |  |
Amortization of net actuarial loss | $ 357,000 us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses |  | $ 1,803,000 us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses |  | $ 1,403,000 us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses |
Amortization of prior service cost | 1,556,000 us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax |  | 1,556,000 us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax |  | 1,556,000 us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | (1,913,000)us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax | [1] | (3,359,000)us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax | [1] | (2,959,000)us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax | [1]
Defined Benefit Plan, Future Amortization of Gain (Loss) | 800,000 us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss |  |  |  |  |
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit) | $ 1,600,000 us-gaap_DefinedBenefitPlanFutureAmortizationOfPriorServiceCostCredit |  |  |  |  |
[1] | The accumulated other comprehensive loss components are included in the computation of net periodic benefit costs as further discussed in Note 20. Postretirement Benefits.

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- Definition The amount of gains or losses recognized in net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
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- Definition Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
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- Details
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- Definition Amount before tax of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 + Details
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- Definition Amount before tax of reclassification adjustments of other comprehensive income (loss). + References No definition available. + Details
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