Contingencies (Details 1) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended			12 Months Ended
	Dec. 29, 2010 TransWeb [Member]	Nov. 30, 2013 TransWeb [Member]	Nov. 30, 2013 TransWeb [Member]	Sep. 24, 2013 TransWeb [Member]	Nov. 30, 2013 Pending Litigation [Member] TransWeb [Member]	Dec. 01, 2012 Pending Litigation [Member] TransWeb [Member]	Dec. 03, 2011 Pending Litigation [Member] TransWeb [Member]
Loss Contingency [Abstract]
Litigation settlement			$ 34
Gain contingency not yet recognized				26,147
Business acquisition, effective date of acquisition	Dec. 29, 2010
Purchase price excluding cash acquired	30,017
Business acquisition, purchase price withheld		17,000
Business acquisition, legal charges paid and applied against purchase price withheld		$ 17,000			$ 531	$ 10,140	$ 6,329