Business Acquisitions (Schedule of Finite-Lived Intangible Assets Acquired, Future Amortization Expense) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 28, 2012
2013 (remaining)	$ 19,436
2014	32,860
2015	28,770
2016	27,063
2017	25,319
Thereafter	163,767
Business Acquisition, Acquiree - Duarte Business [Member]
2013 (remaining)	4,316
2014	5,588
2015	4,003
2016	3,663
2017	3,663
Thereafter	55,910
Total amount of acquired intangible assets	$ 77,143	$ 79,300

The aggregate amount assigned to a major class of finite-lived intangible assets acquired 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 Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 44

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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

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-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

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