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Acquisitions (Pro Forma Results of Operations) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 07, 2012	Sep. 09, 2011	Sep. 07, 2012	Sep. 09, 2011
Business Combinations [Abstract]
Revenues	$ 195,496	$ 183,882	$ 530,595	$ 493,992
(Loss) income from continuing operations	(27,996)	4,740	(24,806)	(3,286)
Net (loss) income	$ (42,086)	$ 4,492	$ (25,711)	$ (3,485)
Basic and diluted (loss) earnings per share:
Continuing operations	$ (0.14)	$ 0.02	$ (0.13)	$ (0.02)
Net (loss) income	$ (0.22)	$ 0.02	$ (0.13)	$ (0.02)

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Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic And Diluted

+ References

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Business Acquisition, Pro Forma Net Income (Loss), Net of Tax, Per Share, Basic And Diluted

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

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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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

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