Income Taxes (Details) (USD $)	3 Months Ended	6 Months Ended
Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011	Dec. 31, 2011
Income Taxes (Textual) [Abstract]
Income tax expense	$ 3,670,000	$ 10,739,000	$ 11,790,000	$ 19,145,000
Effective income tax rate on income from continuing operations before taxes	8.00%		15.00%
Applicable statutory United States tax rate			35.00%
Reduction in valuation allowance associated with net operating loss	10,700,000		10,400,000
Deferred tax asset valuation allowance	$ 13,300,000		$ 13,300,000		$ 24,900,000

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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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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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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- Definition

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 amount of the change in the period in the valuation allowance for a specified deferred tax asset.

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