Pension and Other Postretirement Plans (Amounts Affecting Accumulated Other Comprehensive Income Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 28, 2015	Nov. 29, 2014	Nov. 30, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total	$ (1,664)	$ 7,789	$ (21,029)
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Amortization of prior service (cost) credit, net of tax of $(2), $(5) and $(43), $(43), respectively	0	5
Amortization of actuarial (losses) gains, net of tax of $1,351, $1,063 and $(30), $(52), respectively	(2,324)	(1,821)
Current year actuarial losses (gains), net of tax of $(1,081), $(5,559) and $27, $(6), respectively	1,827	9,509
Curtailment gain, net of tax of $797, $0 and $0, $0, respectively	(1,396)	0
Effect of change in deferred tax rate	150	(78)
Total	(1,743)	7,615
Defined Benefit Plan, Tax Amounts
Amortization of prior service (cost) credit, tax amount	(2)	(5)
Amortization of actuarial (losses) gains, tax amount	1,351	1,063
Current year actuarial losses (gains), tax amount	(1,081)	(5,559)
Curtailment gain, tax amount	797	0
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Amortization of prior service (cost) credit, net of tax of $(2), $(5) and $(43), $(43), respectively	79	79
Amortization of actuarial (losses) gains, net of tax of $1,351, $1,063 and $(30), $(52), respectively	57	95
Current year actuarial losses (gains), net of tax of $(1,081), $(5,559) and $27, $(6), respectively	(51)	11
Curtailment gain, net of tax of $797, $0 and $0, $0, respectively	0	0
Effect of change in deferred tax rate	(6)	(11)
Total	79	174
Defined Benefit Plan, Tax Amounts
Amortization of prior service (cost) credit, tax amount	(43)	(43)
Amortization of actuarial (losses) gains, tax amount	(30)	(52)
Current year actuarial losses (gains), tax amount	27	(6)
Curtailment gain, tax amount	$ 0	$ 0