Acquisition And Goodwill (Schedule Of Unaudited Pro Forma Financial Information) (Details) (USD $) In Thousands	3 Months Ended	9 Months Ended
Oct. 02, 2011	Sep. 26, 2010	Oct. 02, 2011	Sep. 26, 2010
Acquisition And Goodwill
Total revenues	$ 211,805	$ 195,448	$ 629,716	$ 558,301
Net income (loss)	$ 704	$ (9,242)	$ (6,302)	$ (22,842)

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=6909870&loc=d3e1392-128463

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration