Stockholders' Equity (Roll Forward Of Class A Common Shares Outstanding) (Details)	9 Months Ended
Oct. 01, 2011	Oct. 02, 2010
Stockholders' Equity [Abstract]
Balance at the beginning of the year	55,711,325	58,318,983
Repurchases	(3,924,910)	(2,449,286)
Stock option, rights and ESPP issuances	453,728	296,512
Restricted share issuances	214,324	375,279
Restricted share forfeitures	(14,013)	(14,627)
Shares withheld for tax obligations	(51,944)	(7,198)
Balance at the end of the period	52,388,510	56,519,663

Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any.

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The number of restricted shares issued as compensation, net of shares for the payment of withholding taxes. This element is to be used only if shares are used in lieu of cash to satisfy all or a portion of withholding taxes.

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Number of shares related to Restricted Stock Award forfeited during the period.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Stock Issued During Period, Shares, Stock Options and Employee Stock Purchase Plan

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