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Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2011 | Dec. 25, 2010 | Dec. 26, 2009 | Aug. 16, 2011 | Aug. 23, 2010
Equity [Abstract] |  |  |  |  |
Shares authorized for repurchase |  |  |  | 1,000,000 | 2,000,000
Remaining shares available for repurchase under August 16, 2011 authorization | 516,551 |  |  |  |
Common stock repurchased during period, shares | 1,206,111 |  |  |  |
Total cost of repurchase of common stock | $ 50,450 | $ 102,736 | $ 55,757 |  |
Preferred stock, shares authorized and unissued | 2,000,000 |  |  |  |
Preferred stock, shares issued | 0 |  |  |  |

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