Pension and Other Postretirement Plans (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 03, 2011	Nov. 27, 2010	Nov. 28, 2009
Fair Value Disclosures [Abstract]
Defined Benefit Plan Fair Value Of Plan Assets Before Reconciling Items	$ 112,114	$ 100,446
Defined Benefit Plan Fair Value Of Plan Assets Reconciling Items to Fair Value of Plan Assets	434	420
Defined Benefit Plan, Fair Value of Plan Assets	112,548	100,866
Level 1 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	7,407	7,277
Level 2 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	100,925	89,966
Level 3 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	3,782	3,203
U.S. equity securities funds [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	68,481	60,386
U.S. equity securities funds [Member] | Level 1 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
U.S. equity securities funds [Member] | Level 2 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	68,481	60,386
U.S. equity securities funds [Member] | Level 3 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Non-U.S. equity securities funds [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	12,613	11,747
Non-U.S. equity securities funds [Member] | Level 1 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	5,424	5,475
Non-U.S. equity securities funds [Member] | Level 2 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	7,189	6,272
Non-U.S. equity securities funds [Member] | Level 3 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fixed income securities funds [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	27,171	25,094
Fixed income securities funds [Member] | Level 1 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	1,916	1,786
Fixed income securities funds [Member] | Level 2 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	25,255	23,308
Fixed income securities funds [Member] | Level 3 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Real estate funds [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	3,782	3,203
Real estate funds [Member] | Level 1 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Real estate funds [Member] | Level 2 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Real estate funds [Member] | Level 3 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	3,782	3,203	3,053
Cash and equivalents [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	67	16
Cash and equivalents [Member] | Level 1 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	67	16
Cash and equivalents [Member] | Level 2 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Cash and equivalents [Member] | Level 3 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	$ 0	$ 0