Income Taxes (Details) (USD $)	3 Months Ended	9 Months Ended
Sep. 23, 2012	Jun. 24, 2012	Sep. 25, 2011	Sep. 23, 2012	Sep. 25, 2011	Dec. 26, 2010
Income Taxes [Abstract]
Valuation Allowance, Amount	$ 2,700,000		$ 34,700,000	$ 2,700,000	$ 34,700,000	$ 43,300,000
Income tax benefit (provision)	5,174,000		(896,000)	(981,000)	(2,954,000)
Effective Income Tax Rate, Continuing Operations	(52.00%)		17.00%	(3.00%)	(10.00%)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	21,700,000
Deferred tax assets, decrease	12,700,000
Income Tax Benefit, Reduction of Deferred Tax Assets Valuation Allowance					(8,600,000)
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations		$ 6,300,000

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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- Definition

The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.

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