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Immaterial Restatement Not Restated (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended			12 Months Ended
	Jul. 01, 2012	Jun. 26, 2011	Jul. 01, 2012	Jun. 26, 2011	Jul. 01, 2012	Jun. 26, 2011	Dec. 31, 2011	Dec. 31, 2011 Pro Forma [Member]	Dec. 31, 2010 Pro Forma [Member]	Dec. 31, 2009 Pro Forma [Member]
Net income (loss)	$ 36,322	$ 4,282	$ (29,093)	$ (80,644)	$ 122,297	$ (68,891)		$ 1,400	$ 1,500	$ 1,200
Provision (benefit) for taxes	11,221	3,528	(10,318)	(16,071)	16,970	37,418		600	600	400
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 1,111,530	$ 1,010,392	$ 1,111,530	$ 1,010,392	$ 1,111,530	$ 1,010,392	$ 1,063,188

- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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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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