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Pension and Other Postretirement Plans (Components of Net Periodic Benefit Income) (Details) (Other Postretirement Benefit Plans, Defined Benefit [Member], USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Nov. 29, 2014
Nov. 30, 2013
Dec. 01, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]      
Interest cost $ 10us-gaap_DefinedBenefitPlanInterestCost $ 9us-gaap_DefinedBenefitPlanInterestCost $ 17us-gaap_DefinedBenefitPlanInterestCost
Prior service cost (122)us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit (122)us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit (122)us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
Net actuarial gain (147)us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses (149)us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses (121)us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses
Net periodic benefit income $ (259)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost $ (262)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost $ (226)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Discount rate 3.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate 2.25%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate 3.50%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
Net Periodic Benefit Expense (Income) [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]      
Measurement date 11/30/2013 11/30/2012 11/30/2011