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Consolidated Condensed Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 30, 2012	Dec. 31, 2011
Consolidated Condensed Balance Sheets [Abstract]
Property, plant and equipment, accumulated depreciation	$ 1,786,308	$ 1,665,983
Common stock, par value	$ 0.01	$ 0.01

- 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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