Stock-based Compensation (Summary Of Stock Option Activity) (Details) (Stock Options [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
Jun. 29, 2014
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Balance, December 30, 2013	1,493
Options, Granted	79
Options, Exercised	(92)
Options, Cancelled	(257)
Options, Balance, June 29, 2014	1,223
Options, Vested and expected to vest at June 29, 2014	1,183
Options, Exercisable, June 29, 2014	874
Options, Weighted Average Exercise Price, Balance, December 30, 2013	$ 41.93
Options, Weighted Average Exercise Price, Granted	$ 33.00
Options, Weighted Average Exercise Price, Exercised	$ 24.42
Options, Weighted Average Exercise Price, Cancelled	$ 54.40
Options, Weighted Average Exercise Price, Balance, June 29, 2014	$ 40.05
Options, Weighted Average Exercise Price, Vested and expected to vest at June 29, 2014	$ 40.27
Options, Weighted Average Exercise Price, Exercisable, June 29, 2014	$ 42.40
Options, Weighted Average Remaining Contractual Term (in years), Balance, June 29, 2014	6 years 0 months 22 days
Options, Weighted Average Remaining Contractual Term (in years), Vested and expected to vest, June 29, 2014	5 years 11 months 23 days
Options, Weighted Average Remaining Contractual Term (in years), Exercisable, June 29, 2014	5 years 2 months 5 days
Options, Aggregate Intrinsic Value, Balance, June 29, 2014	$ 363
Options, Aggregate Intrinsic Value, Vested and expected to vest at June 29, 2014	363
Options, Aggregate Intrinsic Value, Exercisable, June 29, 2014	$ 361

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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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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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Net number of share options (or share units) granted during the period.

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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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Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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Weighted average remaining contractual term for fully vested and expected to vest options 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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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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

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