Pension and Other Postretirement Plans (Details 4) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2013	Dec. 01, 2012	Dec. 03, 2011
Fair Value Disclosures [Abstract]
Defined Benefit Plan Fair Value Of Plan Assets Before Reconciling Items	$ 156,384	$ 146,166
Defined Benefit Plan Fair Value Of Plan Assets Reconciling Items to Fair Value of Plan Assets	0	141
Defined Benefit Plan, Fair Value of Plan Assets	156,384	146,307
Level 1 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	156,384	146,166
Level 2 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Level 3 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
U.S. equity securities funds [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	55,129	61,272
U.S. equity securities funds [Member] | Level 1 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	55,129	61,272
U.S. equity securities funds [Member] | Level 2 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
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	24,587	27,422
Non-U.S. equity securities funds [Member] | Level 1 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	24,587	27,422
Non-U.S. equity securities funds [Member] | Level 2 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
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	76,121	56,854
Fixed income securities funds [Member] | Level 1 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	76,121	56,854
Fixed income securities funds [Member] | Level 2 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
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] | Level 3 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	0	0	3,782
Cash and equivalents [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	547	618
Cash and equivalents [Member] | Level 1 [Member]
Fair Value Disclosures [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	547	618
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