Discontinued Operations (Summary Of The Net Income (Loss) And Earnings (Loss) Per Common Share From Discontinued Operations) (Details) (USD $)	3 Months Ended	12 Months Ended
Dec. 31, 2012	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Dec. 31, 2011	Sep. 25, 2011	Jun. 26, 2011	Mar. 27, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Discontinued Operation, Additional Disclosures [Abstract]
Revenue									$ 0	$ 0	$ 48,563,000
Loss before income taxes									0	(407,000)	(131,034,000)
Net income (loss)	$ 0	$ 0	$ 0	$ 0	$ 51,000	$ 0	$ 0	$ 0	$ 0	$ 51,036,000	$ (113,124,000)
Earning (loss) per common share	$ 0.00	$ 0.0	$ 0.0	$ 0.0	$ 0.22	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.22	$ (0.48)

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Research Bulletin (ARB)

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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- Definition

The amount of net income or loss derived from discontinued operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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