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Employee Benefit Plans (Schedule Of Valuation And Expense Information) (Details)
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3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
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Sep. 29, 2013
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Sep. 30, 2012
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Sep. 29, 2013
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Sep. 30, 2012
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term (in days) | 4 years 5 months 8 days | 4 years 4 months 24 days | 4 years 5 months 8 days | 4 years 4 months 24 days |
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | 1.14% | 0.48% | 0.71% | 0.64% |
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate | 46.40% | 52.30% | 48.10% | 52.20% |
| Dividend yield (in percentage) | 0.00% | 0.00% | 0.00% | 0.00% |