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Property, Plant And Equipment (Narrative) (Details) (USD $)
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Dec. 31, 2011
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Jan. 01, 2011
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| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, at cost | $ 1,830,039,000 | $ 1,663,299,000 |
| Accumulated depreciation | 1,092,588,000 | 1,060,391,000 |
| Purchase price obligation for assets | 38,300,000 | |
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Capital Leases And Other [Member]
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| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, at cost | 43,600,000 | 45,300,000 |
| Accumulated depreciation | 16,200,000 | 15,400,000 |
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Mortgage [Member]
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| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, at cost | 21,200,000 | |
| Accumulated depreciation | 2,000,000 | 1,500,000 |
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Asset Under Construction [Member]
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| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, at cost | $ 22,600,000 |
| X | ||||||||||
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- 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Gross amount, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The carrying amount of the long-term purchase obligation as of the balance sheet date, which equals the sum of all payments due. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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