Contingencies (Details 1) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended
	Dec. 29, 2010 TransWeb [Member]	Dec. 01, 2012 TransWeb [Member]	Dec. 03, 2011 TransWeb [Member]	Dec. 01, 2012 TransWeb [Member] Purchase Price Withheld Remaining Current [Member]	Mar. 03, 2012 Legal Contingency - Antitrust [Member]	Dec. 01, 2012 TransWeb [Member]
Business Acquisition, Purchase Price Withheld Disclosures [Line Items]
Litigation Settlement, Expense					$ 625
Business Acquisition, Effective Date of Acquisition	Dec. 29, 2010
Business Acquisition, Purchase Price Withheld	17,000
Business Acquisition, Legal Charges Paid and Applied Against Purchase Price Withheld		10,140	6,329
Business Acquisition, Purchase Price Withheld Remaining Balance				531
Loss Contingency [Abstract]
Litigation Settlement, Gross						$ 34