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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified | Dec. 26, 2012 | Dec. 28, 2011
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Statement of Financial Position [Abstract] |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, authorized (in shares) | 135,000 | 135,000
Common stock, issued (in shares) | 103,764 | 102,668
Common stock, outstanding (in shares) | 92,229 | 95,972
Treasury stock, at cost (in shares) | 11,535 | 6,696

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