Pension and Other Postretirement Plans (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 01, 2013	Jun. 02, 2012	Jun. 01, 2013	Jun. 02, 2012
Defined Benefit Plan Disclosure [Line Items]
Cash contributions	$ 1,583		$ 16,543
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash contributions	1,565	1,575	16,507	14,928
Components of net periodic benefit cost (income):
Service cost	621	530	1,243	1,060
Interest cost	1,726	1,980	3,456	3,959
Expected return on plan assets	(2,693)	(2,105)	(5,392)	(4,208)
Amortization of unrecognized:
Prior service cost	(2)	(3)	(5)	(6)
Net actuarial loss (gain)	1,515	1,909	3,031	3,818
Net periodic benefit cost (income)	1,167	2,311	2,333	4,623
Postretirement Healthcare Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash contributions	18	25	36	50
Components of net periodic benefit cost (income):
Interest cost	2	4	4	8
Amortization of unrecognized:
Prior service cost	(31)	(31)	(62)	(62)
Net actuarial loss (gain)	(37)	(30)	(74)	(60)
Net periodic benefit cost (income)	$ (66)	$ (57)	$ (132)	$ (114)