Stock-Based Compensation (Details 6) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Apr. 26, 2013
Apr. 27, 2012
Apr. 29, 2011
Footnote Stock Based Compensation Plans [Abstract]      
Total Intrinsic Value of Options $ 2,921 $ 2,907 $ 2,140
Cash Received from Exercise of Stock Options 7,027 13,347 7,132
Tax Benefit Realized from Exercise of Stock Options 2,641 1,671 2,389
Total Excess Tax Benefits 2,390 791 236
Number of Shares Available for Grant 1,775,000    
Total Fair Value of Vested Shares 8,268 4,999 5,973
Actual Tax Benefit Realized For Tax Deductions $ 934 $ 700 $ 404