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Stock-Based Compensation (Details 6) (USD $)	3 Months Ended
Stock-Based Compensation (Details 6) (USD $)	Jul. 01, 2012	Jul. 03, 2011
Weighted average assumptions to calculate fair values of options granted
Expected term of options (years)	4 years 2 months 12 days	4 years 3 months 18 days
Risk-free interest rate	0.60%	1.50%
Expected volatility	42.00%	41.00%
Expected dividend yield
Weighted average estimated fair value	$ 2.75	$ 2.15

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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