Immaterial Restatement Restated Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Jul. 01, 2012	Dec. 31, 2011	Jun. 26, 2011
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 1,111,530	$ 1,063,188	$ 1,010,392
Assets	2,141,898	2,055,958	2,156,311
Deferred Tax Liability	137,288	133,767	128,203
Limited Partners' Capital Account	93,946	165,518	59,400
Equity	67,509	141,800	36,082
As previously filed [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment		(1,044,589)	(992,971)
Assets		2,074,557	2,173,732
Deferred Tax Liability		135,446	129,499
Limited Partners' Capital Account		182,438	75,525
Correction [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment		(18,599)	(17,421)
Assets		(18,599)	(17,421)
Deferred Tax Liability		(1,679)	(1,296)
Limited Partners' Capital Account		$ (16,920)	$ (16,125)

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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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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- Definition

Represents the noncurrent portion of deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A noncurrent taxable temporary difference is a difference between the tax basis and the carrying amount of a noncurrent asset or liability in the financial statements prepared in accordance with generally accepted accounting principles. In a classified statement of financial position, an enterprise separates deferred tax liabilities and assets into a current amount and a noncurrent amount. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, are classified according to the expected reversal date of the temporary difference.

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- Definition

The amount of the limited partners' ownership interests.

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- Definition

The amount of ownership interest of different classes of partners in limited partnership.

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