The calculated weighted-average amortization period of a major class of finite-lived intangible assets acquired during the current period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 44

-Subparagraph a(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16265-109275

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

Business Acquisitions, Investments and Redeemable Noncontrolling Interests (Details 3) (USD $) In Thousands, unless otherwise specified				12 Months Ended		12 Months Ended		12 Months Ended				12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 03, 2011	Nov. 27, 2010	Dec. 29, 2010 TransWeb [Member]	Dec. 03, 2011 TransWeb [Member] Customer relationships [Member] years	Dec. 29, 2010 TransWeb [Member] Customer relationships [Member]	Dec. 03, 2011 TransWeb [Member] Developed technology [Member] years	Dec. 29, 2010 TransWeb [Member] Developed technology [Member]	Dec. 03, 2011 TransWeb [Member] Non-compete agreements [Member] years	Dec. 29, 2010 TransWeb [Member] Non-compete agreements [Member]	Dec. 29, 2010 TransWeb [Member] Trade names and trademarks - indefinite lived [Member]	Dec. 29, 2008 Keddeg [Member]	Nov. 28, 2009 Keddeg [Member] Customer relationships [Member] years	Dec. 29, 2008 Keddeg [Member] Customer relationships [Member]	Nov. 28, 2009 Keddeg [Member] Developed technology [Member] years	Dec. 29, 2008 Keddeg [Member] Developed technology [Member]	Nov. 28, 2009 Keddeg [Member] Non-compete agreements [Member] years	Dec. 29, 2008 Keddeg [Member] Non-compete agreements [Member]	Dec. 29, 2008 Keddeg [Member] Trade names and trademarks - indefinite lived [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Trade names and trademarks - indefinite lived	$ 42,525	$ 41,625								$ 900								$ 553
Acquired Finite-lived Intangible Asset, Amount			$ 12,100		$ 8,500		$ 3,500		$ 100		$ 2,217		$ 875		$ 1,256		$ 86
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life				12		12		2				12		10		5