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Stock- Based Compensation (Details 3) (USD $)
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12 Months Ended |
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Apr. 29, 2011
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| Footnote Stock Based Compensation Plans [Abstract] | |
| Per share fair value of options | $ 7.60 |
| Expected Dividend Yield | 2.57% |
| Expected Volatility | 45.64% |
| Risk-free Interest Rate | 1.18% |
| Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Term | 3 years 6 months |