Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified																																	12 Months Ended
	Nov. 30, 2013	Dec. 01, 2012	Nov. 30, 2013 Mutual fund investments - equities [Member]	Dec. 01, 2012 Mutual fund investments - equities [Member]	Nov. 30, 2013 Mutual fund investments - bonds [Member]	Dec. 01, 2012 Mutual fund investments - bonds [Member]	Nov. 30, 2013 Cash and equivalents [Member]	Dec. 01, 2012 Cash and equivalents [Member]	Nov. 30, 2013 Level 1 [Member]	Dec. 01, 2012 Level 1 [Member]	Nov. 30, 2013 Level 1 [Member] Mutual fund investments - equities [Member]	Dec. 01, 2012 Level 1 [Member] Mutual fund investments - equities [Member]	Nov. 30, 2013 Level 1 [Member] Mutual fund investments - bonds [Member]	Dec. 01, 2012 Level 1 [Member] Mutual fund investments - bonds [Member]	Nov. 30, 2013 Level 1 [Member] Cash and equivalents [Member]	Dec. 01, 2012 Level 1 [Member] Cash and equivalents [Member]	Nov. 30, 2013 Level 2 [Member]	Dec. 01, 2012 Level 2 [Member]	Nov. 30, 2013 Level 2 [Member] Mutual fund investments - equities [Member]	Dec. 01, 2012 Level 2 [Member] Mutual fund investments - equities [Member]	Nov. 30, 2013 Level 2 [Member] Mutual fund investments - bonds [Member]	Dec. 01, 2012 Level 2 [Member] Mutual fund investments - bonds [Member]	Nov. 30, 2013 Level 2 [Member] Cash and equivalents [Member]	Dec. 01, 2012 Level 2 [Member] Cash and equivalents [Member]	Nov. 30, 2013 Level 3 [Member]	Dec. 01, 2012 Level 3 [Member]	Nov. 30, 2013 Level 3 [Member] Mutual fund investments - equities [Member]	Dec. 01, 2012 Level 3 [Member] Mutual fund investments - equities [Member]	Nov. 30, 2013 Level 3 [Member] Mutual fund investments - bonds [Member]	Dec. 01, 2012 Level 3 [Member] Mutual fund investments - bonds [Member]	Nov. 30, 2013 Level 3 [Member] Cash and equivalents [Member]	Dec. 01, 2012 Level 3 [Member] Cash and equivalents [Member]	Nov. 30, 2013 TransWeb [Member]	Dec. 29, 2010 TransWeb [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted trust, included in other noncurrent assets	$ 1,024	$ 1,070	$ 593	$ 614	$ 400	$ 425	$ 31	$ 31	$ 1,024	$ 1,070	$ 593	$ 614	$ 400	$ 425	$ 31	$ 31	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
TransWeb contingent earn-out, included in other long-term liabilities	0	1,292							0	0							0	0							0	1,292								1,018
Change in fair value of TransWeb contingent earn-out																																	$ 0