Pension and Other Postretirement Plans (Details 6) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 01, 2012	Dec. 03, 2011	Nov. 27, 2010	Jan. 01, 2007
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Defined Contribution Plan, Cost Recognized	$ 4,377	$ 3,933	$ 3,597
Pension Plans, Defined Benefit [Member]
Components of net periodic benefit cost (income):
Service cost	2,126	1,968	2,119
Interest cost	7,715	8,133	8,108
Expected return on plan assets	(9,181)	(7,674)	(7,123)
Settlement cost	0	1,368	0
Amortization of unrecognized:
Prior service cost	(10)	(395)	(394)
Net actuarial loss (gain)	8,323	5,110	5,006
Net periodic benefit cost (income)	8,973	8,510	7,716
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.50%	7.50%	7.75%
Defined Benefit Plan Weighted Average Next Fiscal Year Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Net prior service cost (credit)	(21)	(30)
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	6,694
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2012	28,821
2013	8,069
2014	8,424
2015	8,769
2016	9,225
2017-2021	54,131
Pension Plans, Defined Benefit [Member] | Prior Service Cost (Credit) [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	(10)
Pension Plans, Defined Benefit [Member] | Actuarial Loss (Gain) [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	6,704
Pension Plans, Defined Benefit [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.50%	5.25%	5.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.00%	4.00%	4.00%
Defined Benefit Plan Weighted Average Next Fiscal Year Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan Next Fiscal Year Assumptions For Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets	7.50%
Defined Benefit Plan, Next Fiscal Year Assumptions for Calculating Net Periodic Benefit Cost, Discount Rate	3.50%
Defined Benefit Plan Next Fiscal Year Assumptions For Calculating Net Periodic Benefit Cost Rate Of Compensation Increase	4.00%
Defined Benefit Plan Effect on Next Fiscal Year Net Periodic Benefit Cost From Changes in Assumptions	(774)
Pension Plans, Defined Benefit [Member] | Qualified Pension Plans [Member] | Net Periodic Benefit Expense (Income) [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Measurement Date	11/30/2011	11/30/2010	11/30/2009
Pension Plans, Defined Benefit [Member] | U.S. Combined Nonqualified Plans [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	1.75%	2.75%	2.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.00%	4.00%	4.00%
Defined Benefit Plan Weighted Average Next Fiscal Year Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Next Fiscal Year Assumptions for Calculating Net Periodic Benefit Cost, Discount Rate	1.75%
Defined Benefit Plan Next Fiscal Year Assumptions For Calculating Net Periodic Benefit Cost Rate Of Compensation Increase	4.00%
Defined Benefit Plan Effect on Next Fiscal Year Net Periodic Benefit Cost From Changes in Assumptions	(838)
Pension Plans, Defined Benefit [Member] | U.S. Combined Nonqualified Plans [Member] | Net Periodic Benefit Expense (Income) [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Measurement Date	11/30/2012	11/30/2011	11/30/2010
Other Postretirement Benefit Plans, Defined Benefit [Member]
Components of net periodic benefit cost (income):
Service cost	0	0
Interest cost	17	23	32
Amortization of unrecognized:
Prior service cost	(122)	(122)	(123)
Net actuarial loss (gain)	(121)	(130)	(129)
Net periodic benefit cost (income)	(226)	(229)	(220)
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.50%	3.75%	4.25%
Defined Benefit Plan Weighted Average Next Fiscal Year Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Next Fiscal Year Assumptions for Calculating Net Periodic Benefit Cost, Discount Rate	2.25%
Net prior service cost (credit)	(718)	(840)		1,708
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	(272)
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2012	70
2013	64
2014	59
2015	47
2016	39
2017-2021	129
Other Postretirement Benefit Plans, Defined Benefit [Member] | Prior Service Cost (Credit) [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	(123)
Other Postretirement Benefit Plans, Defined Benefit [Member] | Actuarial Loss (Gain) [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	$ (149)
Other Postretirement Benefit Plans, Defined Benefit [Member] | Net Periodic Benefit Expense (Income) [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Measurement Date	11/30/2011	11/30/2010	11/30/2009