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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Statement of Financial Position [Abstract]
Allowance for receivables	$ 0	$ 85
Accumulated depreciation on property, plant and equipment	626,732	635,450
Accumulated amortization on acquired intangibles assets	$ 104,822	$ 104,351

- 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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