Stock-Based Employee Compensation (Summary Of Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 24, 2015
Stock-Based Employee Compensation [Abstract]
Outstanding at beginning of year, Shares	1,429,000
Exercised, Shares
Forfeited, Shares	(6,000)
Outstanding at end of period, Shares	1,423,000
Options exercisable at end of period, Shares	463,875
Outstanding at beginning of year, Weighted average exercise price	$ 17.45
Exercised, Weighted average exercise price
Forfeited, Weighted average exercise price	$ 19.90
Outstanding at end of period, Weighted average exercise price	$ 17.44
Options exercisable at end of period, Weighted average exercise price	$ 16.29
Outstanding at end of period, Weighted average Remaining Contractual Term	7 years 10 months 24 days
Options exercisable at end of period, Weighted average Remaining Contractual Term	7 years 9 months 18 days
Outstanding at end of period, Aggregate Intrinsic Value	$ 4,550
Options exercisable at end of period, Aggregate Intrinsic Value	$ 1,927

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Number of share options (or share units) exercised during the current period.

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